Needleless injector locking mechanism

Abstract

The utility model relates to the technical field of medical syringes, and discloses a needleless syringe locking mechanism which comprises a needleless syringe and a locking fixing ring, a height fixing ring for an injection cylinder below the needleless syringe to penetrate through is arranged at the top of the locking fixing ring, an air bag capable of being inflated and deflated is arranged above the height fixing ring, and the height fixing ring is connected with the height fixing ring. A trumpet-shaped soft outer film is arranged on the lower portion, the other side of the outer film is connected with a pressing ring, an adhesive film with the adhesive bottom face is arranged on the outer side of the pressing ring, and an air pipe penetrates through the adhesive film, transversely penetrates through the pressing ring from the outer side of the adhesive film and extends into the lower portion of the outer film. According to the needleless injector, the locking fixing ring is pasted on the skin, so that the position of the needleless injector is fixed and locked, the needleless injector can be kept stable in the using process, the situation that the needleless injector falls off due to vibration or external force is avoided, and it can be ensured that an injection barrel below the injector can be tightly attached to the skin; the injection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical syringes, in particular to a locking mechanism for a needle-free syringe. Background Art

[0002] A needle-free syringe is a medical device that uses the instantaneous high pressure generated by a power source to make the drug in the syringe form a high-speed, high-pressure jet stream through the nozzle, thereby allowing the drug to penetrate the outer layer of the skin to the subcutaneous, intradermal and other tissue layers to release its efficacy. A needle-free syringe is also called a jet syringe.

[0003] During the injection process, the needle-free syringe needs to pay attention to the injection position and injection angle, as well as the degree of fit with the skin. When holding the syringe, especially when the patient injects himself, it is easy for the injection angle and position to change due to hand shaking, and the syringe does not fit the skin completely, leaving marks during the injection and the drug solution is not fully injected, and partially flows out. Therefore, a fixed locking mechanism is needed to fix the needle-free syringe at the position where the injection is required. This fixed locking structure on the skin will inevitably pull the skin to a certain extent, making the skin tight. When the skin is too tight, it will increase pain during injection. Therefore, it is necessary to design a needle-free syringe fixing and locking mechanism that can adjust the tightness of the skin. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the utility model provides a needle-free syringe locking mechanism, which has the advantages of fixing the needle-free syringe on the skin surface and being able to adjust the degree of skin looseness, thereby solving the problem that the skin may not be in the best injection condition during injection.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of fixing the needle-free syringe on the skin surface and being able to adjust the degree of skin looseness, the utility model provides the following technical solutions: a needle-free syringe locking mechanism, including a needle-free syringe and a locking fixing ring, the top of the locking fixing ring is provided with a height fixing ring for the syringe barrel below the needle-free syringe to pass through, the top of the height fixing ring is provided with an air bag that can be inflated and deflated, and the bottom is provided with a trumpet-shaped soft outer membrane, the other side of the outer membrane is connected to a pressing ring, and a sticky film with a sticky bottom surface is provided on the outside of the pressing ring, a trachea is passed through the sticky film, and it passes through the pressing ring horizontally from the outside of the sticky film and extends into the bottom of the outer membrane.

[0008] Preferably, the outer membrane side array has support strips, and the support strips are elastic and can change their curvature along with the outer membrane.

[0009] Preferably, when the curvature of the support strip changes due to the expansion and contraction of the outer membrane, it can drive the pressing ring to expand and contract.

[0010] Preferably, the pressing ring is made of silicone material, and can inflate the inside of the ring to increase its diameter, thereby pressing the patient's skin. The pressing can compress the capillaries around the injection site, thereby slowing down the blood flow out of the injection port.

[0011] Preferably, the upper surface of the adhesive film is provided with raised patterns, and when the adhesive film is pasted, the raised patterns can effectively avoid slipping and prevent the adhesive film from slipping out of the hand during pasting.

[0012] Preferably, the outer film is made of a transparent polyethylene film, which is often used to make a film material that can fit closely to human skin. It is of medical grade, has good plasticity and softness, can provide a comfortable feeling when in contact with human skin, and will not cause damage to the skin.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a needle-free syringe locking mechanism, which has the following beneficial effects: 1. The needle-free syringe locking mechanism allows the syringe barrel below the needle-free syringe to pass through the height fixing ring at the top of the locking fixing ring, and uses an air pump to fill gas into the air bag above the height fixing ring to expand it, so that the locking fixing ring can be fixed on the syringe barrel of the needle-free syringe, and no gap is left at the fixing position, and the center of the locking fixing ring is aligned with the part where injection is required, and is adhered to the skin through the outermost adhesive film of the outer membrane, and the inner side of the adhesive film is aligned with the inner side of the adhesive film. The pressing ring between the outer membranes is inflated, and after expansion, it presses the skin, and forms a closed space under the locking ring. Because the locking ring is adhered to the skin, the position of the needle-free syringe is fixed and locked, so that the needle-free syringe can remain stable during use, avoiding the needle-free syringe from falling off due to vibration or external force, and ensuring that the syringe barrel under the syringe can fit closely with the skin, thereby improving the injection accuracy and ensuring that the drug is accurately delivered to the target tissue layer, and fixing the position of the needle-free syringe to ensure injection The syringe can be kept perpendicular to the skin, reducing the phenomenon of injection port imprints and the phenomenon of partial outflow of incomplete injection of the drug; 2. The locking mechanism of the needle-free syringe has a support strip array on the side of the outer membrane, which is elastic and can change its curvature with the outer membrane. A trachea is passed through the sticky membrane, which passes through the pressing ring horizontally from the outside of the sticky membrane and extends under the outer membrane. When the support strip changes its curvature due to the expansion and contraction of the outer membrane, it can drive the pressing ring to expand and contract, and the air under the locking ring is extracted through the trachea. When the air is reduced, the outer membrane will shrink inwards and at the same time, it will be locked with the outer membrane. The connected support strips will also shrink inward, and the shrinkage of the support strips will drive the pressing ring to move inward, reducing the force that originally pulls the skin, and loosening the skin at the injection site from a tight state, but not too loose. In a loose skin state, injection may be easier because the skin has less resistance. However, if the skin is too loose, it may cause uneven skin after injection, affecting the appearance. Enabling the skin to be in the best injection state can not only avoid the patient's pain, but also ensure the quality of the injection and reduce marks left at the injection site and drug leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 It is a cutaway schematic diagram of the utility model.

[0017] Figure 3 It is a schematic diagram of the outer membrane contraction of the utility model.

[0018] In the figure: 1. needle-free syringe; 2. locking fixing ring; 11. syringe barrel; 21. outer membrane; 22. adhesive membrane; 23. height fixing ring; 211. support bar; 221. pressing ring; 222. trachea; 231. air bag. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-2 A needle-free syringe locking mechanism comprises a needle-free syringe 1 and a locking fixing ring 2, wherein a height fixing ring 23 is provided on the top of the locking fixing ring 2 for the syringe barrel 11 below the needle-free syringe 1 to pass through, an air bag 231 capable of being inflated and deflated is provided on the top of the height fixing ring 23, and a trumpet-shaped soft outer membrane 21 is provided on the bottom, the other side of the outer membrane 21 is connected to a pressing ring 221, and a sticky film 22 with a sticky bottom surface is provided on the outside of the pressing ring 221.

[0021] Furthermore, the syringe barrel 11 below the needle-free syringe 1 is passed through the height fixing ring 23 at the top of the locking and fixing ring 2, and gas is filled into the air bag 231 above the height fixing ring 23 through an air pump to expand it, so that the locking and fixing ring 2 can be fixed on the syringe barrel 11 of the needle-free syringe 1, and no gap is left at the fixed position. The center of the locking and fixing ring 2 is aligned with the part where injection is required, and it is pasted on the skin through the outermost adhesive film 22 of the outer film 21, and the pressing ring 221 between the inner side of the adhesive film 22 and the outer film 21 is inflated. After expansion, the skin is pressed, and the locking and fixing ring 2 A closed space is formed below, because the position of the needle-free syringe 1 is fixed and locked by adhering a locking ring 2 on the skin, so that the needle-free syringe 1 can remain stable during use, and avoid the needle-free syringe 1 from falling off due to vibration or external force, and can ensure that the syringe barrel 11 below the syringe can fit closely with the skin, improve the injection accuracy, ensure that the drug is accurately delivered to the target tissue layer, fix the position of the needle-free syringe 1, ensure that the syringe can remain vertical to the skin, and reduce the phenomenon of injection port imprints and the phenomenon of partial outflow of incompletely injected drugs.

[0022] See also Figure 3The outer film 21 has a side array of support strips 211, and the support strips 211 are elastic and can change their curvature along with the outer film 21. The adhesive film 22 has an air tube 222 passing through it, which passes through the pressing ring 221 laterally from the outside of the adhesive film 22 and extends under the outer film 21.

[0023] Furthermore, when the arc of the outer membrane 21 expands and contracts, the support strip 211 can drive the pressing ring 221 to expand and contract, and the air under the locking and fixing ring 2 is extracted through the trachea 222. When the air is reduced, the outer membrane 21 will shrink inward. At the same time, the support strip 211 connected to the outer membrane will also shrink inward. The shrinkage of the support strip 211 will drive the pressing ring 221 to move inward, thereby reducing the force that originally pulls the skin, and loosening the skin at the injection site from a tight state, but not too loose. In the state of loose skin, injection may be easier because the skin resistance is smaller. However, if the skin is too loose, it may cause uneven skin after injection, affecting the appearance. Enabling the skin to be in the best injection state can not only avoid the patient's pain, but also ensure the quality of the injection, reduce the mark left at the injection site and the leakage of the drug.

[0024] The pressing ring 221 is made of silicone material and can inflate the inside of the ring to increase its diameter and press the patient's skin. The pressing can compress the capillaries around the injection site, thereby slowing down the blood flow from the injection port. When the blood outflow rate slows down, the amount of bleeding will decrease. The choice of silicone material not only makes the device durable, but also has excellent softness, and can provide a gentle pressing effect, making the patient feel more comfortable, which helps to reduce the patient's tension and anxiety, thereby improving the overall treatment experience.

[0025] The upper surface of the adhesive film 22 is provided with raised patterns (not shown in the figure). When the adhesive film 22 is pasted, the raised patterns can effectively avoid slipping, preventing the adhesive film 22 from slipping out of the hand during pasting, resulting in the need for re-pasting, affecting the user's operation, and reducing the stickiness of the bottom surface due to repeated pasting, resulting in loose subsequent pasting.

[0026] The outer film 21 is made of a transparent polyethylene film, which is a medical grade film commonly used to make films that can fit closely to human skin, has good plasticity and softness, can provide a comfortable feeling when in contact with human skin, and will not cause damage to the skin. It also has moderate stretchability and can follow the movement of the body without falling off easily.

[0027] Working principle: The syringe 11 below the needle-free syringe 1 is passed through the height fixing ring 23 at the top of the locking and fixing ring 2, and gas is filled into the air bag 231 above the height fixing ring 23 through an air pump to expand it, so that the locking and fixing ring 2 can be fixed on the syringe 11 of the needle-free syringe 1, and there will be no gap in the fixed position. The center of the locking and fixing ring 2 is aligned with the part where the injection is required, and it is attached to the skin through the outermost adhesive film 22 of the outer film 21, and the pressing ring 221 between the inner side of the adhesive film 22 and the outer film 21 is inflated to expand. After the skin is expanded, the skin is pressed, and a closed space is formed under the locking ring 2. Because the locking ring 2 is adhered to the skin, the position of the needle-free syringe 1 is fixed and locked. In this way, when the syringe barrel 11 is pressed down to make it close to the skin, the locking ring 2 will inevitably expand outward as a whole, so that the adhesive film 22 will pull the skin, making the skin at the injection site become tight due to the pulling. Because the needle-free syringe 1 uses the instantaneous high pressure generated by the power source to make the drug in the syringe pass through the spray nozzle, the needle-free syringe 1 will be injected into the skin. The nozzle forms a high-speed, high-pressure jet flow, so that the drug penetrates the outer layer of the skin to the subcutaneous, intradermal and other tissue layers to release the drug effect. When the skin is tight, more obvious pain may be felt during injection, because when the skin is tight, the resistance to the syringe will be greater. In addition, the tight skin may also cause the injection depth to be inaccurate, thereby affecting the injection effect. The air under the locking and fixing ring 2 can be extracted through the trachea 222. When the air is reduced, the outer membrane 21 will shrink inward. At the same time, the support bar 211 connected to the outer membrane will also shrink inward. The shrinkage of the support bar 211 will drive the pressing ring 221 to move inward, so that the force that originally pulls the skin is reduced, and the skin at the injection site becomes a little loose from the tight state, but not too loose. In the state of loose skin, injection may be easier because the skin resistance is small. However, if the skin is too loose, it may cause the skin to become uneven after injection, affecting the appearance. Making the skin in the best injection state can not only avoid the patient's pain, but also ensure the injection quality and reduce the mark left at the injection site and the leakage of drugs.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A needle-free syringe locking mechanism, comprising a needle-free syringe (1) and a locking fixing ring (2), characterized in that: The top of the locking fixing ring (2) is provided with a height fixing ring (23) for the syringe (11) below the needle-free syringe (1) to pass through, the top of the height fixing ring (23) is provided with an air bag (231) capable of being inflated and deflated, and the bottom is provided with a trumpet-shaped soft outer membrane (21), the other side of the outer membrane (21) is connected to a pressing ring (221), and a sticky membrane (22) with a sticky bottom surface is provided on the outside of the pressing ring (221), and a trachea (222) is passed through the sticky membrane (22), and passes through the pressing ring (221) horizontally from the outside of the sticky membrane (22) and extends into the bottom of the outer membrane (21).

2. The needle-free syringe locking mechanism according to claim 1, characterized in that: The outer membrane (21) has a side array of support strips (211), and the support strips (211) are elastic and can change their curvature along with the outer membrane (21).

3. The needle-free syringe locking mechanism according to claim 2, characterized in that: The support strip (211) can drive the pressing ring (221) to expand and contract when the curvature changes due to the expansion and contraction of the outer membrane (21).

4. The needle-free syringe locking mechanism according to claim 1, characterized in that: The pressing ring (221) is made of a silicone material and is capable of inflating air into the interior of the ring to increase its diameter.

5. The needle-free syringe locking mechanism according to claim 1, characterized in that: The upper surface of the adhesive film (22) is provided with raised patterns.

6. The needle-free syringe locking mechanism according to claim 1, characterized in that: The outer film (21) is made of a transparent polyethylene film.

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