Spring energy storage pre-tightening tourniquet
By using a spring-energy-storing pre-tightening tourniquet design, and utilizing a constant-force spring and ratchet pawl mechanism, the problem of high unlocking force in special situations is solved, achieving both low-force unlocking and pressure control.
Patent Information
- Application Number
- CN202422865660.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-25
AI Technical Summary
When using existing tourniquets in special situations such as wearing cotton clothing in winter, greater force is required to unlock them, which is difficult to meet the needs of use after the increase in pre-tightening force.
The tourniquet adopts a spring-energy-storing pre-tightening design, utilizing a constant-force spring and ratchet pawl mechanism. It can be unlocked with a small force by rotating the button, and the spring energy provides the pressure required for hemostasis.
Under high preload, the ratchet can be released from the ratchet teeth by rotating the button, achieving easy unlocking and meeting the hemostasis requirements.
Smart Images
Figure CN223640775U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a tourniquet, especially a spring energy storage pre-tightening tourniquet, and belongs to the technical field of rescue equipment. BACKGROUND
[0002] A tourniquet is a common medical device, and the applicant introduces the existing tourniquet and provides a spring energy storage pre-tightening tourniquet in Chinese patent application No. 202422213300X. The tourniquet can meet the requirements of the existing tourniquet, but in some special situations, such as training or rescue activities in winter wearing cotton clothes, the tourniquet may need to be put outside the cotton clothes, which requires a greater pressure provided by the tourniquet. When the pre-tightening force of the coil spring increases, more force is needed to unlock. How to reduce the force required for unlocking is a problem that needs to be solved in this design. SUMMARY
[0003] The utility model provides a spring energy storage pre-tightening tourniquet aiming at the above problems.
[0004] To achieve the purpose of the utility model, the following technical solutions are adopted: a spring energy storage pre-tightening tourniquet, including the shell, two parallel fixed shafts are fixedly connected on the shell, a cylinder is sleeved on each fixed shaft, a constant force clockwork spring is arranged in the cylinder, the inner end of the constant force clockwork spring is fixedly connected to the fixed shaft, and the outer end is fixedly connected to the cylinder. A long hole is formed in the shell for the bandage to pass through, and the two ends of the bandage are fixedly connected to the cylinders, respectively. One ratchet wheel is fixedly connected to the end of each cylinder, a fixed plate is fixedly connected to the fixed shaft, two rotating shafts are rotatably connected to the fixed plate, one pawl is fixedly connected to the inner end of each rotating shaft, the two pawls are matched with the two ratchet wheels, respectively, one lever arm is fixedly connected to the outer end of each rotating shaft, a large gear wheel and a small gear wheel meshing with the large gear wheel are rotatably installed on the fixed plate, two unlocking blocks are fixedly connected to the edge of the large gear wheel, the two unlocking blocks are located on the side surface of the end of the two lever arms away from the rotating shaft, the large gear wheel unlocking block drives the lever arm to rotate the rotating shaft, the rotating shaft drives the pawl to disengage from the ratchet wheel, and an unlocking knob is fixedly connected to the small gear wheel.
[0005] Further, the two rotating shafts are located on the upper part and the lower part of the fixed plate.
[0006] Further, the center of the large gear wheel is located between the two lever arms.
[0007] Further, the bandage is an adjustable length bandage.
[0008] The tourniquet provided by the utility model under the action of larger pre-tightening force, through the rotating button, under the action of pinion and gear wheel, lever arm, smaller force can be used to remove the restriction of pawl to ratchet, make pawl and ratchet separate, use the energy storage of constant force spring to pull in bandage to provide the required pressure. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 It is the internal schematic view of the utility model.
[0010] Figure 2 It is the schematic view near two gears.
[0011] Figure 3 It is Figure 1 The schematic view of taking on knob.
[0012] Figure 4 It is the whole schematic view of the utility model.
[0013] Figure 5 It is the schematic view of a section. DETAILED DESCRIPTION
[0014] In order to more fully explain the implementation of the utility model, the implementation example of the utility model is provided.These implementation examples are only the elaboration of the utility model, and do not limit the scope of the utility model.
[0015] The utility model is further explained in detail in combination with the drawings, and the various marks in the drawings are as follows: 1: fixed shaft A; 2: fixed shaft B; 3: cylinder A; 4: cylinder B; 5: ratchet wheel A; 6: ratchet wheel B; 7: pawl A; 8: pawl B; 10: unlocking block B; 11: fixed plate; 12: gear wheel; 13: pinion; 14: rotating shaft B; 15: rotating shaft A; 16: lever arm B; 17: lever arm A; 18: unlocking block A; 19: knob; 20: shell; 21: bandage; 22: long hole A; 23: long hole B; 24: constant force spring A; 25: constant force spring B.
[0016] As shown in the drawings, a spring energy pre-tightening tourniquet comprises a shell 20, two parallel fixed shafts A1 and B2 are fixedly connected on the shell, a cylinder is rotatably sleeved on each fixed shaft, a cylinder A3 is matched on the fixed shaft A and a cylinder B4 is matched on the fixed shaft B in the drawings, a constant force clockwork spring A24 is arranged in the cylinder A and a constant force clockwork spring B25 is arranged in the cylinder B, the inner end of the constant force clockwork spring is fixedly connected on the fixed shaft and the outer end is fixedly connected on the cylinder, long holes A22 and B23 are formed on the shell for the bandage to pass through, the two ends of the bandage 21 pass through the two long holes respectively and are fixedly connected on the two cylinders respectively, the bandage shell is wound on the cylinder, and the constant force clockwork spring is charged after the cylinder is rotated by the stretched bandage. The bandage is an adjustable length bandage, which is easily realized and is very common in daily life, such as an adjustable length backpack belt scheme on a backpack.
[0017] A ratchet wheel is fixedly connected on the end of each cylinder, a ratchet wheel A5 is fixedly connected on the end of the cylinder A and a ratchet wheel B6 is fixedly connected on the end of the cylinder B in the drawings, a fixed plate 11 is fixedly connected on the two fixed shafts, two rotating shafts A15 and B14 are rotatably connected on the fixed plate, the two rotating shafts are located on the upper part and the lower part of the fixed plate respectively, the inner end of each rotating shaft is fixedly connected with a pawl, a pawl A7 is fixedly connected on the rotating shaft A and a pawl B8 is fixedly connected on the rotating shaft B in the drawings, the two pawls are matched with the two ratchet wheels respectively, the pawl A is matched with the ratchet wheel A and the pawl B is matched with the ratchet wheel B, the outer end of each rotating shaft is fixedly connected with a lever arm, the outer end of the rotating shaft A is fixedly connected with a lever arm A17 and the outer end of the rotating shaft B is fixedly connected with a lever arm B16, a large gear 12 and a small gear 12 meshing with the large gear are rotatably installed on the fixed plate, the center of the large gear is located between the two lever arms, two unlocking blocks A18 and B10 are fixedly connected on the edge of the large gear, the two unlocking blocks are located on the side face of the end of the two lever arms away from the rotating shaft, the unlocking block A drives the lever arm A to rotate the rotating shaft A when the large gear is rotated, the rotating shaft A rotates to drive the pawl A to disengage from the ratchet wheel A, at the same time, the unlocking block B drives the lever arm B to rotate the rotating shaft B, the rotating shaft B rotates to drive the pawl B to disengage from the ratchet wheel B, the unlocking knob 19 is fixedly connected on the small gear, and the small gear is rotated by rotating the unlocking button. According to the need of unlocking, unlocking press rotating direction marks can be pasted or made on the unlocking button.
[0018] The utility model discloses a bandage is provided with the constant force spring storage device, and the constant force spring storage device is provided with the one-way rotation mechanism, and the one-way rotation mechanism is formed by the ratchet wheel and the pawl, and the pawl is connected with the rotation unlocking button, and the ratchet wheel is connected with the cylinder, and the cylinder is connected with the bandage, and the cylinder is provided with the spring storage device, and the spring storage device is connected with the pawl, and the spring storage device is connected with the rotation unlocking button.
[0019] The working principle of the utility model is same with the applicant's Chinese patent application No.
[0020] After the embodiment of the utility model is described in detail, the person skilled in the art can clearly understand that various changes and modifications can be carried out without departing from the above patent application range and spirit, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the utility model all belong to the range of the utility model technical scheme, and the utility model is also not limited to the implementation mode of the examples in the specification.
Claims
1. A spring-energized pre-tensioned tourniquet comprising a housing, characterized in that: Two parallel fixing shafts are fixedly connected on the shell, a cylinder is sleeved on each fixing shaft, a constant force clockwork spring is arranged in the cylinder, the inner end of the constant force clockwork spring is fixedly connected on the fixing shaft, the outer end is fixedly connected on the cylinder, a long hole for the bandage to pass through is arranged on the shell, the two ends of the bandage are fixedly connected on the cylinders, one ratchet wheel is fixedly connected on the end of each cylinder, a fixed plate is fixedly connected on the fixing shaft, two rotating shafts are rotatably connected on the fixed plate, one pawl is fixedly connected on the inner end of each rotating shaft, the two pawls are matched with the two ratchet wheels respectively, one lever arm is fixedly connected on the outer end of each rotating shaft, a large gear wheel and a small gear wheel meshing with the large gear wheel are rotatably installed on the fixed plate, two unlocking blocks are fixedly connected on the edge of the large gear wheel, the two unlocking blocks are respectively located on the side face of the end of the two lever arms away from the rotating shafts, the rotating large gear wheel unlocks the blocks to drive the lever arms to rotate the rotating shafts, the rotating shafts drive the pawls to disengage from the ratchet wheels, and an unlocking knob is fixedly connected on the small gear wheel.
2. The spring-energized pre-tensioned tourniquet of claim 1, wherein: The two rotating shafts are respectively located on the upper part and the lower part of the fixed plate.
3. The spring-energized pre-tensioned tourniquet of claim 1, wherein: The center of the large gear wheel is located between the two lever arms.
4. The spring-energized pre-tensioned tourniquet of claim 1, wherein: The bandage is a length-adjustable bandage.