Energy-storage rapid pre-tightening tourniquet

Abstract

An energy storage rapid pre-tightening tourniquet comprises a shell, a spring energy storage device is installed in the shell and comprises a fixing shaft fixedly arranged in the shell, the fixing shaft is sleeved with a cylinder, the inner end of a constant-force clockwork spring is fixedly connected to the fixing shaft, and the outer end of the constant-force clockwork spring is fixedly connected to the cylinder. The energy-storage rapid pre-tightening tourniquet further comprises a cylinder rotating locking and unlocking mechanism, one or two spring energy storage devices are arranged, when the number of the spring energy storage devices is two, the two ends of the bandage are fixed to cylinders of the two spring energy storage devices respectively, and when the number of the spring energy storage devices is one, the two ends of the bandage are fixed to the cylinders of the two spring energy storage devices respectively. One end of the bandage is fixed to the cylinder of the spring energy storage device, the other end of the bandage is fixed to the shell, and a long hole for the bandage to pass through is formed in the shell. The tourniquet is high in hemostasis speed.

Description

TECHNICAL FIELD

[0001] The present application relates to a tourniquet, in particular to a tourniquet with energy storage and rapid pre-tightening, and belongs to the technical field of rescue equipment. BACKGROUND

[0002] Tourniquets are widely used in medical rescue, field rescue, emergency rescue and disaster relief. The common tourniquets include inflatable type, tape type, cloth strip type and rotary pressure type. The inflatable type needs corresponding power and is mainly used in medical field. The tape type and cloth strip type are simple and low in cost, and are generally used for short-term and simple hemostasis, such as blood drawing, and often need the assistance of others. The rotary pressure type tourniquet can be used for field rescue, self-help of wounded in battlefield, emergency rescue and disaster relief, and can achieve hemostasis by rotating the button with the assistance of others or by self-rotation of the button under the condition of convenient body condition and hemostatic site. However, the rotary pressure button has certain requirements for force, and the hemostasis is gradually achieved during the rotation of the button, so there is a process of hemostasis, and the amount of bleeding will be large in the case of fast bleeding. SUMMARY

[0003] The present application aims to provide a tourniquet with energy storage and rapid pre-tightening, which can achieve simple operation and rapid hemostasis.

[0004] In order to achieve the purpose of the present application, the following technical scheme is adopted: a tourniquet with energy storage and rapid pre-tightening, comprising a shell, a spring energy storage device is installed in the shell, the spring energy storage device comprises a fixed shaft fixedly arranged in the shell, a cylinder is sleeved on the fixed shaft, an inner end of a constant force clockwork spring is fixedly connected to the fixed shaft, and an outer end of the constant force clockwork spring is fixedly connected to the cylinder, the tourniquet with energy storage and rapid pre-tightening further comprises a cylinder rotation locking and unlocking mechanism, the spring energy storage device is one set or two sets, when the spring energy storage device is two sets, two ends of the bandage are fixedly connected to the cylinders of the two sets of spring energy storage devices, when the spring energy storage device is one set, one end of the bandage is fixedly connected to the cylinder of the spring energy storage device, and the other end of the bandage is fixedly connected to the shell, and an elongated hole is formed in the shell for the bandage to pass through.

[0005] Further, the spring energy storage device is two sets.

[0006] Further, an end plate with a middle hole is fixedly connected to one end of the cylinder, the periphery of the middle hole is provided with a ratchet, a long slot is formed in the fixed shaft, one end of the elastic sheet is fixedly connected to the fixed shaft, the elastic sheet is located in the long slot, and the elastic sheet and the ratchet form a ratchet mechanism in a natural state. An inclined surface of the elastic sheet is inclined to the fixed shaft, a unlocking sleeve is slidably arranged on the fixed shaft near the outer end of the elastic sheet, the unlocking sleeve is fixedly connected to the fixed sheet, the inner end of the tension return spring is arranged on the spring seat, the spring seat is fixedly connected to the shell, a button is fixedly connected to the fixed sheet, the outer end of the tension return spring is arranged on the fixed sheet or the button, the button extends to the outside of the shell through the hole of the shell, and when the button moves to the shell, the unlocking sleeve drives the elastic sheet to move radially along the fixed shaft through the inclined surface, and the elastic sheet is out of the range of the ratchet.

[0007] Further, the cylinder rotation locking and unlocking mechanism is that a face tooth A is fixedly connected to one end of the cylinder, a face tooth B is slidably arranged on the fixed shaft, the face tooth A is in engagement with the face tooth B, a compression spring is arranged on the fixed shaft outside the face tooth B, the inner end of the compression spring is in abutment with the face tooth B, and the outer end of the compression spring is in abutment with a spring limiting portion, the spring limiting portion is directly or indirectly fixedly connected to the fixed shaft, an outward extending radial sheet is fixedly connected to the face tooth B, a pull ring shaft is fixedly connected to the radial sheet, the pull ring shaft extends to the outside of the shell through the hole of the shell, and a pull ring is connected to the pull ring shaft, and the pull ring is pulled to drive the face tooth B to move outward and out of engagement with the face tooth A.

[0008] Further, the cylinder rotation locking and unlocking mechanism is that an outer gear ring is fixedly connected to the cylinder, the outer gear ring is coaxial with the cylinder, a rack that can be engaged with the outer gear ring is arranged at the lower portion of the outer gear ring, a tension spring is arranged below the rack, the upper end of the tension spring is arranged on the rack, and the lower end of the tension spring is arranged on the shell. A guide hole is formed in the rack, a guide column is fixedly arranged in the shell, the guide column is arranged in the guide hole, an upward pressing rod is fixedly connected to the rack, the pressing rod extends to the upper end face of the shell through the upper end face, and the engagement state of the outer gear ring and the rack is released by pressing the pressing rod downward.

[0009] Further, a protection sheet or a protection ring is fixedly connected to the periphery of the button.

[0010] Further, the fixed shaft on which the face tooth B is arranged is a spline shaft, and the face tooth B is slidably arranged on the spline shaft through internal splines.

[0011] Further, the bottom surface of the shell is a concave surface.

[0012] Further, the bandage is a length-adjustable bandage.

[0013] The positive and beneficial technical effects of this invention are as follows: This hemostatic bandage utilizes the rotation of a cylinder to drive a constant force spring to store energy. After energy storage, the cylinder is locked. When hemostasis is needed, the locking is released, and the bandage tightens around the area to be hemostatic under the action of the constant force spring. After testing, the constant force spring can fully meet the pressure requirements for hemostasis of the upper and lower limbs. Moreover, this hemostatic bandage can be operated by one person with one hand, and the locking can be released instantly. It has a fast hemostasis speed and is suitable for use in various occasions such as wilderness rescue, natural disaster rescue, first aid, and self-rescue of the wounded. Attached Figure Description

[0014] Figure 1 This is an overall schematic diagram of the first embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the first embodiment after the shell has been removed.

[0016] Figure 3 This is a schematic diagram of the first embodiment with some components removed.

[0017] Figure 4 This is a schematic diagram of a cross-section along a fixed axis in the first embodiment.

[0018] Figure 5 This is a schematic diagram of another cross-section along the fixed axis in the first embodiment.

[0019] Figure 6 It is a cross-sectional schematic diagram along the fixed axis.

[0020] Figure 7 This is a schematic diagram of the second embodiment of the cylindrical rotation locking and unlocking mechanism.

[0021] Figure 8 This is a schematic diagram of the third embodiment of the cylindrical rotation locking and unlocking mechanism. Detailed Implementation

[0022] To more fully explain the implementation of the present invention, implementation examples are provided. These implementation examples are merely illustrative of the present invention and do not limit the scope of the present invention.

[0023] The invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1: housing; 2: strap; 3: concave surface; 4: button; 5: protective plate; 6: fixing shaft; 7: cylinder; 8: ratchet; 9: spring piece; 10: inclined surface; 11: unlocking sleeve; 12: tightening and resetting spring; 13: spring seat; 14: constant force spring; 15: long slit; 16: fixing piece; 17: face tooth A; 18: face tooth B; 19: deposit spring; 20: pull ring shaft; 21: pull ring; 22: external gear ring; 23: rack; 24: tightening spring; 25: guide post; 26: pressing rod; 27: radial piece.

[0024] As shown in the attached figure, an energy-storing, rapid pre-tightening tourniquet includes a housing 1, which can be a modular housing. The bottom surface of the housing is concave 3, which can better adapt to the contour of the limb. A spring energy-storing device is installed inside the housing. The spring energy-storing device includes a fixed shaft 6 fixedly installed inside the housing, and a cylinder 7 is sleeved on the fixed shaft. The inner end of a constant-force spring 14 is fixedly connected to the fixed shaft, and the outer end is fixedly connected to the cylinder. The energy-storing, rapid pre-tightening tourniquet also includes a cylinder rotation locking and unlocking mechanism. The spring energy-storing device can be one or two sets. When there are two sets of spring energy-storing devices, both ends of the bandage 2 are fixed to the cylinders of the two sets of spring energy-storing devices, respectively. When there is one set of spring energy-storing devices, one end of the bandage is fixed to the cylinder of the spring energy-storing device, and the other end is fixed to the housing. An elongated hole is provided on the housing for the bandage to pass through. In this embodiment, the bandage is an adjustable length bandage. Adjustable length bandages are easy to implement. They can be made using the current adjustable length backpack strap with a rectangular buckle or a square buckle with Velcro.

[0025] The embodiment shown in the figure has two sets of spring energy storage devices. It is easy to understand that the technical solution of the present invention can also be achieved with only one set. Compared with two sets of spring energy storage devices, if one set of spring energy storage devices is used, a more powerful constant force spring is required to achieve the required pressure (pressure). The size of the housing may also need to be increased. Moreover, when pulling out the preload, a greater pulling force is required, and when releasing, a greater force is required.

[0026] As an embodiment 1, the cylindrical rotation locking and unlocking mechanism is as follows: an end plate with a central hole is fixedly connected to one end of the cylinder, the periphery of the central hole is a ratchet tooth 8, a long slot 15 is opened on the fixed shaft, one end of a spring piece 9 is fixedly connected to the fixed shaft, the spring piece is located in the long slot, in the natural state, the spring piece and the ratchet tooth form a ratchet mechanism, the outer end of the spring piece is an inclined surface 10 inclined towards the fixed shaft, an unlocking sleeve 11 is slidably passed through the fixed shaft near the outer end of the spring piece, the unlocking sleeve is fixedly connected to the fixed plate 16, and the inner end of the push-tightening return spring is pushed against the fixed plate 16. On the spring seat, the spring seat 13 is fixedly connected to the housing, and the button 4 is fixedly connected to the fixing plate 16. The outer end of the pressing and resetting spring is set on the fixing plate or the button. In this embodiment, the button is cylindrical, and the pressing and resetting spring is located inside the cylindrical shape. The button 4 extends out of the housing through the hole in the housing. When the button moves towards the housing, the unlocking sleeve presses the spring piece radially along the fixed axis through the inclined surface. The spring piece is disengaged from the ratchet range. At this time, the cylinder rotates under the action of the spring to tighten the bandage. The constant force spring tightens the bandage to generate pressure that meets the requirements of the hemostatic bandage.

[0027] A protective plate or ring is fixedly connected around the button. In this embodiment, a protective plate 5 is used. The protective plate 5 is to prevent accidental triggering. When the button is accidentally triggered, the end face of the protective plate 5 is blocked and the button cannot be unlocked.

[0028] As an embodiment 2, the cylindrical rotation locking and unlocking mechanism is as follows: a face tooth A17 is fixedly connected to one end of the cylinder, and a face tooth B18 is slidably sleeved on a fixed shaft. Face tooth A can mesh with face tooth B. A compression spring 19 is sleeved on the fixed shaft outside face tooth B. The inner end of the compression spring 19 abuts against face tooth B, and the outer end abuts against the spring limiting part. The spring limiting part is directly or indirectly fixedly connected to the fixed shaft. An outwardly extending radial plate 27 is fixedly connected to face tooth B, and a pull ring shaft 20 is fixedly connected to the radial plate. The pull ring shaft extends through a hole in the housing and extends outside the housing. A pull ring 21 is connected to the pull ring shaft. Pulling the pull ring drives face tooth B to move outward and disengage from face tooth A. After face tooth A and face tooth B separate, the cylinder rotates and tightens the bandage under the energy storage of the constant force spring, generating pressure that meets the requirements of the hemostatic bandage. In this embodiment, the fixed shaft where tooth surface B is fitted is a spline shaft. Tooth surface B is slidably fitted onto the spline shaft via an internal spline, which can prevent relative rotation between tooth surface B and tooth surface A.

[0029] As an example 3, the terms "upper" and "lower" in Example 3 are for reference only. Figure 8 This is a more detailed explanation and does not represent the actual location in use. The cylinder rotation locking and unlocking mechanism is as follows: an external gear ring 22 is fixedly connected to the cylinder, and the external gear ring is coaxial with the cylinder. A rack 23 that can mesh with the external gear ring is provided at the lower part of the external gear ring. A pressing spring 24 is provided below the rack. The upper end of the pressing spring rests on the lower part of the rack, and the lower end is fixed on the housing. A guide hole is opened on the rack. A guide post 25 is fixedly installed inside the housing. The guide post passes through the guide hole. In order to prevent relative rotation between the rack and the guide post, the guide post and the guide hole can be made of... The non-rotating body, such as the guide post, can be square, and the guide hole is also square. An upward pressing rod 26 is fixedly connected to the rack. In this embodiment, the pressing rod 26 is a hollow rod, and the guide post is located in the hollow rod. The pressing rod can pass through the upper end face and extend to the outside of the upper end face of the shell. Pressing the pressing rod downward releases the engagement state between the outer gear ring and the rack. After the engagement state is released, the cylinder rotates and tightens the bandage under the energy storage of the constant force spring, generating pressure that meets the requirements of the hemostatic bandage.

[0030] In this application, three different cylindrical rotation locking and unlocking mechanisms are disclosed in the three embodiments. Of course, from a mechanical design perspective, there are many other designs that can realize cylindrical rotation locking and unlocking mechanisms. All other specific cylindrical rotation locking and unlocking mechanisms should be included within the scope of the cylindrical rotation locking and unlocking mechanisms in this application.

[0031] When using this hemostatic bandage, pull the bandage outwards to a certain length and place it on the upper or lower limb, locking the cylinder. In this state, the spring does not exert tension on the bandage. When hemostasis is needed, simply release the locking state of the cylinder through the unlocking mechanism, causing the constant-force spring to rotate the cylinder, thus generating the pressure required for hemostasis. Two sets of spring energy storage devices are used; both devices store energy when the bandage is pulled outwards. After the locking is released, the cylinders on both spring energy storage devices pull the bandage in their respective directions.

[0032] The parameters of the constant force spring, bandage, outer cylinder, and fixed shaft in this application are as follows: 1. Constant force spring: Material: 301 stainless steel, or titanium alloy and nickel-based alloy. Specifications: Width 30mm, Length 250mm, Thickness 0.2mm; 2. The outer diameter of the cylinder is 13mm, and the diameter of the fixed shaft is 5mm; 3. Bandages: Material: Nylon With a width of 25mm and a thickness of 0.5mm, a 25mm bandage can generate a pressure of 40 kPa or more. The pressure can be increased or decreased by adjusting the bandage width or the number of turns of the constant-force spring.

[0033] The width of the Velcro straps on the bandage is the same as the width of the bandage itself.

[0034] When using a bandage with a width of 25mm, the upper limb tourniquet produced by the solution of the present invention has a shell length of no more than 65mm, a width of no more than 40mm, and a thickness of no more than 23mm, making it very easy to carry.

[0035] After a detailed description of the embodiments of the present invention, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. An energy-storing rapid-pre-tensioning tourniquet comprising a housing, characterized in that: The spring energy storage device is installed in the shell, and includes a fixed shaft fixedly arranged in the shell, a cylinder sleeved on the fixed shaft, an inner end of a constant force clockwork spring fixedly connected to the fixed shaft, and an outer end of the constant force clockwork spring fixedly connected to the cylinder.

2. The energy-storing rapid-pre-tensioning tourniquet according to claim 1, characterized in that: The spring energy storage device is two sets.

3. The energy-storing rapid-pre-tensioning tourniquet of claim 1, wherein: The cylinder rotation locking and unlocking mechanism is that an end plate with a middle hole is fixedly connected to one end of the cylinder, the periphery of the middle hole is a ratchet, a long slot is formed in the fixed shaft, one end of a spring plate is fixedly connected to the fixed shaft, the spring plate is located in the long slot, and the spring plate and the ratchet form a ratchet and pawl mechanism in a natural state.

4. The energy-storing rapid-pre-tensioning tourniquet of claim 1, wherein: The cylinder rotation locking and unlocking mechanism is that a face tooth A is fixedly connected to one end of the cylinder, a face tooth B is slidably sleeved on the fixed shaft, the face tooth A is engaged with the face tooth B, a compression spring is sleeved on the fixed shaft outside the face tooth B, an inner end of the compression spring is abutted against the face tooth B, and an outer end of the compression spring is abutted against a spring limiting portion which is directly or indirectly fixedly connected to the fixed shaft.

5. The energy-storing rapid-pre-tensioning tourniquet of claim 1, wherein: The cylinder rotation locking and unlocking mechanism is that an outer gear ring is fixedly connected to the cylinder, the outer gear ring is coaxial with the cylinder, a gear rack which can be engaged with the outer gear ring is arranged at a lower portion of the outer gear ring, a tension spring is arranged below the gear rack, an upper end of the tension spring is abutted against the gear rack, and a lower end of the tension spring is fixed to the shell, a guide hole is formed in the gear rack, a guide column is fixedly arranged in the shell, the guide column passes through the guide hole, an upward pressing rod is fixedly connected to the gear rack, the pressing rod extends to an upper end face of the shell outside the upper end face, and the engagement state of the outer gear ring and the gear rack is released by pressing the pressing rod downward.

6. The energy-storing rapid-pre-tensioning tourniquet of claim 2, wherein: A guard plate or a guard ring is fixedly connected to the periphery of the button.

7. The energy-storing rapid-pre-tensioning tourniquet of claim 1, wherein: The fixed shaft on which the face tooth B is sleeved is a spline shaft, and the face tooth B is slidably sleeved on the spline shaft through internal splines.

8. The energy-storing rapid-pre-tensioning tourniquet of claim 1, wherein: The bottom surface of the shell is concave.

9. The energy-storing rapid-pre-tensioning tourniquet of claim 1, wherein: The bandage is a length-adjustable bandage. The bottom surface of the shell is concave.

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