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 hemostasis speed is high.

Description

Technical Field

[0001] The utility model relates to a tourniquet, in particular to an energy-storage fast pre-tightening tourniquet, and belongs to the technical field of rescue equipment. Background Art

[0002] Hemostatic bandages are widely used in medical rescue, field rescue, emergency and disaster relief, etc. Currently, common tourniquets include inflatable, cassette, cloth and spin-type. The inflatable type requires corresponding power and is mainly used in medical occasions. The cassette and cloth tourniquets are simple and low-cost, and are generally used for short-term and simple hemostasis. For example, in blood drawing occasions, assistance from others is often required. The spin-type tourniquet tightens the part that needs hemostasis by rotating the button component. This type of tourniquet can be used for field rescue, self-rescue of wounded on the battlefield, emergency and disaster relief, etc. Bleeding can be achieved by rotating the button with the help of others. If the person's physical condition is good and the bleeding site is convenient, hemostasis can also be achieved by self-rotating the button. This method of rotating the button has certain requirements on strength, and hemostasis is gradually achieved during the rotation of the button. Hemostasis is a process, and the amount of bleeding will be large if the bleeding rate is fast. Summary of the Invention

[0003] The purpose of the utility model is to provide an energy storage fast pre-tightening tourniquet, which can realize simple operation and fast hemostasis.

[0004] To achieve the purpose of the present utility model, the following technical solutions are adopted: an energy-storage, rapid pre-tightening tourniquet, comprising a shell, in which a spring energy-storage device is installed, the spring energy-storage device comprising a fixed shaft fixedly arranged in the shell, a cylinder being sleeved on the fixed shaft, the inner end of the constant force spring being fixedly connected to the fixed shaft, and the outer end being fixedly connected to the cylinder, the energy-storage, rapid pre-tightening tourniquet also comprising a cylinder rotation locking and unlocking mechanism, the spring energy-storage device being one set or two sets, when the spring energy-storage device being two sets, the two ends of the bandage being respectively fixed on the cylinders of the two sets of spring energy-storage devices, when the spring energy-storage device being one set, one end of the bandage being fixed on the cylinder of the spring energy-storage device, and the other end being fixed on the shell, and the shell being provided with an elongated hole for the bandage to pass through.

[0005] Furthermore, there are two sets of spring energy storage devices.

[0006] Furthermore, an end plate with a central hole is fixedly connected to one end of the cylinder, and the periphery of the central hole is a ratchet. A long slot is opened on the fixed shaft, and one end of the spring piece is fixedly connected to the fixed shaft, and the spring piece is located in the long slot. In the natural state, the spring piece and the ratchet constitute a ratchet mechanism. The outer end of the spring piece is an inclined surface inclined toward the fixed shaft, and an unlocking sleeve is slidably penetrated on the fixed shaft near the outer end of the spring piece. The unlocking sleeve is fixedly connected to the fixed piece, and the inner end of the tightening return spring is pressed on the spring seat, and the spring seat is fixedly connected to the shell. A button is fixedly connected to the fixed piece, and the outer end of the tightening return spring is pressed on the fixed piece or the button. The button passes through the hole of the shell and extends outside the shell. When the button moves toward the shell, the unlocking sleeve presses the spring piece radially along the fixed shaft through the inclined surface, and the spring piece leaves the range of the ratchet.

[0007] Furthermore; the cylinder rotation locking and unlocking mechanism is: a face tooth A is fixedly connected to one end of the cylinder, and a face tooth B is slidably sleeved on the fixed shaft, the face tooth A can engage with the face tooth B, and a compression spring is sleeved on the fixed shaft outside the face tooth B, the inner end of the compression spring abuts on the face tooth B, and the outer end abuts on the spring limiting part, the spring limiting part is directly or indirectly fixedly connected to the fixed shaft, the face tooth B is fixedly connected to a radial piece extending outward, and the radial piece is fixedly connected to a pull ring shaft, the pull ring shaft extends through the hole on the shell to the outside of the shell, and a pull ring is connected to the pull ring shaft, and pulling the pull ring drives the face tooth B to move outward and disengage from the face tooth A.

[0008] Furthermore; the cylinder rotation locking and unlocking mechanism is: an outer gear ring is fixedly connected to the cylinder, the outer gear ring is coaxial with the cylinder, a rack that can engage with it is provided at the lower part of the outer gear ring, a tightening spring is provided under the rack, the upper end of the tightening spring is pressed under the rack, and the lower end is fixed on the shell, a guide hole is opened on the rack, a guide column is fixedly installed in the shell, the guide column is passed through the guide hole, and an upward pressing rod is fixedly connected to the rack, the pressing rod passes through the upper end surface and extends to the outside of the upper end surface of the shell, and the pressing rod is pressed downward to release the meshing state of the outer gear ring and the rack.

[0009] Furthermore, a guard sheet or a guard ring is fixedly connected around the button.

[0010] Furthermore, the fixed shaft on which the tooth surface B is sleeved is a spline shaft, and the tooth surface B is slidably sleeved on the spline shaft through an internal spline.

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

[0012] Furthermore, the bandage is a bandage with adjustable length.

[0013] The positive and beneficial technical effect of the present invention is that the hemostatic bandage utilizes the rotation of the cylinder to drive the constant force spring to store energy, and the cylinder is locked after energy storage. When hemostasis is needed, the lock is released and then the bandage is tightened under the action of the constant force spring to stop bleeding. After testing, the constant force spring is fully capable of meeting the pressure requirements for hemostasis of the upper and lower limbs, and the tourniquet shell can be operated by one person with one hand, can be unlocked instantly, and has a fast hemostasis speed. It is suitable for use in various occasions such as field rescue, natural disaster rescue, first aid, and self-rescue of the wounded. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall schematic diagram of the first embodiment of the present utility model.

[0015] Figure 2 It is a schematic diagram of the first embodiment with the housing removed.

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

[0017] Figure 4 It is a schematic diagram of a cross section along the radial direction of the fixed axis of the first embodiment.

[0018] Figure 5 It is a schematic diagram of another cross section along the radial direction of the fixed axis of the first embodiment.

[0019] Figure 6 It is a cross-sectional schematic diagram along the axial direction of the fixed shaft.

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

[0021] Figure 8 It is a schematic diagram of the third embodiment of the cylinder rotation locking and unlocking mechanism. DETAILED DESCRIPTION

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

[0023] The present invention is further explained in detail in conjunction with the accompanying drawings, in which the marks are: 1: shell; 2: strap; 3: concave surface; 4: button; 5: guard plate; 6: fixed shaft; 7: cylinder; 8: ratchet; 9: spring piece; 10: inclined surface; 11: unlocking sleeve; 12: tightening return spring; 13: spring seat; 14: constant force spring; 15: long slit; 16: fixing plate; 17: face tooth A; 18: face tooth B; 19: deposit spring; 20: pull ring shaft; 21: pull ring; 22: outer gear ring; 23: rack; 24: tightening spring; 25: guide column; 26: pressing rod; 27: radial plate.

[0024] As shown in the accompanying drawings, an energy storage fast pre-tightening tourniquet includes a shell 1, which can be a combined shell. The bottom surface of the shell is a concave surface 3, which can better adapt to the contour of the limb. A spring energy storage device is installed in the shell. The spring energy storage device includes a fixed shaft 6 fixedly arranged in the shell, and a cylinder 7 is sleeved on the fixed shaft. The inner end of the constant force spring 14 is fixedly connected to the fixed shaft, and the outer end is fixedly connected to the cylinder. The energy storage fast pre-tightening tourniquet also includes 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, the two ends of the bandage 2 are respectively fixed on 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 fixed on the cylinder of the spring energy storage device and the other end is fixed on the shell. The shell is provided with a long hole for the bandage to pass through. In this embodiment, the bandage is an adjustable length bandage, which is easy to implement. It can be implemented by using the technical solution of the Japanese-shaped buckle on the current adjustable length backpack strap, or by using a U-shaped buckle in combination with Velcro.

[0025] The embodiment 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 implemented in the case of one set. Compared with two sets of spring energy storage devices, using one set of spring energy storage devices requires a constant force spring with greater strength to achieve the required pressure (pressure), and may also require increasing the size of the shell. Moreover, when pulling out the pre-tightening, a greater pulling force is required, and a greater force is required when releasing it.

[0026] As an embodiment 1, the cylinder 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 central hole is surrounded by ratchet teeth 8, a long slit 15 is opened on the fixed shaft, one end of the spring piece 9 is fixedly connected to the fixed shaft, the spring piece is located in the long slit, and in the natural state, the spring piece and the ratchet constitute a ratchet ratchet mechanism, the outer end of the spring piece is an inclined surface 10 inclined toward the fixed shaft, an unlocking sleeve 11 is slidably penetrated on the fixed shaft near the outer end of the spring piece, the unlocking sleeve is fixedly connected to the fixed piece 16, and the inner end of the reset spring is set on the top On the spring seat, the spring seat 13 is fixedly connected to the housing, and a button 4 is fixedly connected to the fixing plate 16. The outer end of the tightening reset spring is placed on the fixing plate or the button. In this embodiment, the button is cylindrical, and the tightening reset spring is located inside the cylinder. The button 4 extends through the hole of the housing to the outside of the housing. When the button moves toward the housing, the unlocking sleeve presses the spring piece radially along the fixed axis through the inclined surface, and the spring piece is out of the range of the ratchet. At this time, the cylinder rotates under the action of the clockwork spring to tighten the bandage, and the constant force clockwork spring tightens the bandage to generate a pressure that meets the requirements of the hemostatic bandage.

[0027] A guard plate or a guard ring is fixedly connected around the button. In this embodiment, a guard plate 5 is used to prevent accidental triggering. When an accidental triggering occurs, the end surface of the guard plate 5 is blocked and the button cannot be unlocked.

[0028] As an embodiment 2; the cylinder 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 the fixed shaft. The face tooth A can mesh with the face tooth B, and a compression spring 19 is sleeved on the fixed shaft outside the face tooth B. The inner end of the compression spring 19 abuts on the face tooth B, and the outer end abuts on the spring limiting part. The spring limiting part is directly or indirectly fixedly connected to the fixed shaft, and an outwardly extending radial piece 27 is fixedly connected to the face tooth B, and a pull ring shaft 20 is fixedly connected to the radial piece. The pull ring shaft extends outside the shell through the hole on the shell, and a pull ring 21 is connected to the pull ring shaft. Pulling the pull ring drives the face tooth B to move outward and disengage from the face tooth A. After the face teeth A and B are separated, the cylinder rotates and tightens the bandage under the action of the energy stored in the constant force spring, generating a pressure that meets the requirements of the hemostatic bandage. In this embodiment, the fixed shaft on which the tooth surface B is sleeved is a spline shaft, and the tooth surface B is slidably sleeved on the spline shaft through an internal spline, which can prevent relative rotation between the tooth surface B and the tooth surface A.

[0029] As an example 3, the upper and lower parts in the example 3 are only for reference. Figure 8 For a clearer explanation, it does not represent the actual orientation in use. The cylinder rotation locking and unlocking mechanism is as follows: an outer gear ring 22 is fixedly connected to the cylinder, the outer gear ring is coaxial with the cylinder, a rack 23 that can mesh with it is provided at the lower part of the outer gear ring, a tensioning spring 24 is provided under the rack, the upper end of the tensioning spring is placed under 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 in the housing, the guide post is passed through the guide hole, in order to prevent the relative rotation between the rack and the guide post, the guide post and the guide hole can be used A non-rotating body, such as a guide post, can be square, and the guide hole is also a corresponding square. An upward pressing rod 16 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 passes through the upper end surface and extends to the outside of the upper end surface of the shell. Pressing the pressing rod downward releases the meshing state between the outer gear ring and the rack. After the meshing state is released, the cylinder rotates and tightens the bandage under the action of the energy stored in the constant force spring, generating a pressure that meets the requirements of the hemostatic bandage.

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

[0031] To use this hemostatic bandage, pull the bandage outward a certain distance, then place it around an upper or lower limb. The cylinder is locked, and in this state, the spring exerts no tension on the bandage. To stop bleeding, simply unlock the cylinder using the unlocking mechanism, allowing the constant-force spring to rotate the cylinder, generating the necessary pressure. This system utilizes two spring energy storage devices. When the bandage is pulled outward, both devices store energy. Once locked, the cylinders on each device pull the bandage inward in their respective directions.

[0032] The parameters of the constant force spring, bandage, outer cylinder, and fixed axis in this application are as follows:

[0033] 1. Clockwork constant force spring:

[0034] Material: 301 stainless steel, or titanium alloy and nickel-based alloy,

[0035] Specifications: width 30mm, length 250mm, thickness 0.2mm;

[0036] 2. The outer diameter of the cylinder is 13mm, and the diameter of the fixed shaft is 5mm;

[0037] 3. Bandage:

[0038] Material: Nylon,

[0039] The width can be 25mm and the thickness can be 0.5mm. When the bandage is 25mm, it can generate a pressure of 40 kPa (including 40 kPa) or more. Increasing or decreasing the pressure can be achieved by increasing or decreasing the width of the bandage and the number of coils of the constant force spring.

[0040] The width of the Velcro on the bandage is consistent with the width of the bandage.

[0041] When using a bandage with a width of 25 mm, the upper limb tourniquet made by the solution of the present invention has a shell length of no more than 65 mm, a width of no more than 40 mm, and a thickness of no more than 23 mm. The weight can be controlled within 100 g by using metal materials, and it is even lighter by using other materials, making it very easy to carry.

[0042] After describing the implementation mode of the present invention in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention, and the present invention is not limited to the implementation mode of the examples given in the specification.

Claims

1. An energy storage rapid pre-tightening tourniquet, comprising a housing, characterized in that: A spring energy storage device is installed in the shell, and the spring energy storage device includes a fixed shaft fixedly arranged in the shell, a cylinder is sleeved on the fixed shaft, the inner end of the constant force spring is fixedly connected to the fixed shaft, and the outer end is fixedly connected to the cylinder. The energy storage rapid pre-tightening tourniquet also includes 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, the two ends of the bandage are respectively fixed on 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 fixed on the cylinder of the spring energy storage device and the other end is fixed on the shell. The shell is provided with a long hole for the bandage to pass through.

2. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: There are two sets of spring energy storage devices.

3. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: The cylinder 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, a long slot is opened on the fixed shaft, one end of the spring piece is fixedly connected to the fixed shaft, the spring piece is located in the long slot, and in the natural state, the spring piece and the ratchet constitute a ratchet ratchet mechanism, the outer end of the spring piece is an inclined surface inclined toward the fixed shaft, and an unlocking sleeve is slidably penetrated on the fixed shaft near the outer end of the spring piece, the unlocking sleeve is fixedly connected to the fixed piece, the inner end of the tightening return spring is pressed on the spring seat, the spring seat is fixedly connected to the housing, and a button is fixedly connected to the fixed piece, the outer end of the tightening return spring is pressed on the fixed piece or the button, the button passes through the hole of the housing and extends outside the housing. When the button moves toward the housing, the unlocking sleeve presses the spring piece radially along the fixed shaft through the inclined surface, and the spring piece leaves the range of the ratchet.

4. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: The cylinder rotation locking and unlocking mechanism is as follows: a face tooth A is fixedly connected to one end of the cylinder, and a face tooth B is slidably sleeved on the fixed shaft. The face tooth A can engage with the face tooth B. A compression spring is sleeved on the fixed shaft outside the face tooth B. The inner end of the compression spring abuts on the face tooth B and the outer end abuts on the spring limiting part. The spring limiting part is directly or indirectly fixedly connected to the fixed shaft. A radial piece extending outward is fixedly connected to the face tooth B, and a pull ring shaft is fixedly connected to the radial piece. The pull ring shaft extends through the hole on the shell and extends outside the shell. A pull ring is connected to the pull ring shaft. Pulling the pull ring drives the face tooth B to move outward and disengage from the face tooth A.

5. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: The cylinder rotation locking and unlocking mechanism is as follows: an outer gear ring is fixedly connected to the cylinder, the outer gear ring is coaxial with the cylinder, a rack that can mesh with it is provided at the lower part of the outer gear ring, a tightening spring is provided under the rack, the upper end of the tightening spring is pressed under the rack, and the lower end is fixed on the shell, a guide hole is opened on the rack, a guide column is fixedly installed in the shell, the guide column is passed through the guide hole, and an upward pressing rod is fixedly connected to the rack, the pressing rod passes through the upper end surface and extends to the outside of the upper end surface of the shell, and the pressing rod is pressed downward to release the meshing state of the outer gear ring and the rack.

6. The energy-storage rapid pre-tightening tourniquet according to claim 2, characterized in that: A guard sheet or a guard ring is fixedly connected around the button.

7. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: The fixed shaft where the tooth surface B is sleeved is a spline shaft, and the tooth surface B is slidably sleeved on the spline shaft through an internal spline.

8. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: The bottom surface of the shell is a concave surface.

9. The energy-storage rapid pre-tightening tourniquet according to claim 1, characterized in that: The bandage is a bandage with adjustable length.

Images