A syringe for hyaluronic acid injection

Abstract

The utility model discloses a syringe for hyaluronic acid injection relates to syringe technical field, including needle cylinder, the inside connection of needle cylinder has the piston, the piston top fixedly connected with piston rod, the piston rod is located the inside of needle cylinder and extends to the top of needle cylinder, the notch is established at the piston rod outer end, the inside through the pivot swing joint of notch has two left and right distribution's fender strip, two fender strip between fixedly connected with spring piece, the sleeve is equipped with on the piston rod outer end, through the cooperation of fender strip, spring piece, sleeve on the piston rod, can when two fender strips unfold when injection is about to end, thereby make piston and piston rod can not again reverse drawout, and further realize self -destruction and avoid being reused, and also can not appear the problem that the injection process is also not the problem that the injection speed of hyaluronic acid is difficult to control that the pushing resistance is too big, and the overall safety is higher, and also more convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of syringe technology, and in particular to a syringe for hyaluronic acid injection. Background Technology

[0002] In recent years, hyaluronic acid injection technology has developed rapidly. Hyaluronic acid injection has the characteristics of no rejection reaction and fast and obvious effect. It is now widely used in anti-aging and local filling plastic surgery, such as correcting deep nasolabial folds, cheek and forehead depressions, and filling wrinkles on the face and neck, all of which have achieved good results.

[0003] A search revealed Chinese patent CN206777589U, which discloses a syringe for hyaluronic acid injection, comprising a needle tube and a plunger. A pull ring is provided between the plunger and the needle tube, and both ends of the pull ring are fixedly connected to the plunger and the needle tube by evenly arranged connecting posts. A rubber stopper is fixedly connected to one end of the plunger inside the needle tube. A plurality of evenly arranged retention grooves are formed on the side wall of the rubber stopper, and a plurality of retention protrusions are fixedly connected at corresponding positions on the inner side wall of the needle tube. A plurality of self-destructing grooves are formed on the left side surface of the rubber stopper, and a plurality of needles are fixedly provided at corresponding positions on the left side wall of the needle tube.

[0004] To prevent the syringes from being reused, the aforementioned public documents added some self-destruct mechanisms. While this solved the problem of syringe reuse to some extent, it still has some shortcomings in actual use. For example, there is significant resistance when the retaining protrusion is inserted into the retaining groove on the rubber stopper and when the needle is inserted into the self-destructing groove on the rubber stopper. In order to push the rubber stopper all the way to inject and push out all the hyaluronic acid and achieve self-destruction, a large pushing force is required at the end. This process is not only quite laborious, but it also causes a sudden increase in the hyaluronic acid injection speed when the retaining protrusion is inserted into the retaining groove on the rubber stopper and when the needle is inserted into the self-destructing groove on the rubber stopper, which poses certain safety hazards and is very inconvenient to use.

[0005] To address the aforementioned shortcomings, this application proposes a syringe for hyaluronic acid injection. Utility Model Content

[0006] This invention provides a syringe for hyaluronic acid injection to solve the above-mentioned technical problems.

[0007] To solve the above-mentioned technical problems, this utility model provides a syringe for hyaluronic acid injection, including a syringe barrel, a piston connected inside the syringe barrel, a piston rod fixedly connected to the top of the piston, the piston rod being located inside the syringe barrel and extending above the syringe barrel, a notch being provided at the outer end of the piston rod, two left and right distributed baffles being movably connected inside the notch via a rotating shaft, a spring plate being fixedly connected between the two baffles, a sleeve being fitted on the outer end of the piston rod, the sleeve being located above the syringe barrel, and the baffles being located inside the sleeve.

[0008] Preferably, a needle is inserted into the nipple at the bottom of the syringe.

[0009] Preferably, the top of the syringe has a through hole, and the piston rod passes through the through hole.

[0010] Preferably, the spring sheet is located at the center between the two stop bars, and the pivot on the stop bar is located below the spring sheet.

[0011] Preferably, the two baffles are symmetrically distributed around the central axis of the piston rod, and the outer side of the baffles is adapted to the outer surface of the piston rod.

[0012] Compared with related technologies, the syringe for hyaluronic acid injection provided by this utility model has the following beneficial effects:

[0013] By designing the top of the syringe as a sealing structure with a perforation, and then creating a notch on the piston rod and installing two stop strips with a spring plate between them, along with a sleeve, the sleeve can be pushed open when the injection is about to end, and the two stop strips will also be pushed open by the spring plate. This prevents the piston and piston rod from being pulled out in the opposite direction, thus achieving self-destruction and avoiding reuse. At the same time, there is no problem of excessive pushing resistance during the injection process, which would make it difficult to control the hyaluronic acid injection speed. Overall, it is safer and more convenient to use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the unused structure of a syringe for hyaluronic acid injection proposed in this utility model;

[0015] Figure 2 This is a front sectional view of an unused syringe for hyaluronic acid injection according to the present invention.

[0016] Figure 3 This is a schematic diagram of the syringe barrel structure for hyaluronic acid injection proposed in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a syringe for hyaluronic acid injection according to the present invention in use.

[0018] Figure 5 This is a front sectional view of the syringe for hyaluronic acid injection proposed in this utility model, showing its usage state.

[0019] Figure 6 This is a partial structural diagram of a syringe for hyaluronic acid injection proposed in this utility model, showing its usage state.

[0020] The following are the labels in the diagram: 1. Syringe, 2. Needle, 3. Piston, 4. Piston rod, 5. Notch, 6. Stop bar, 7. Spring plate, 8. Sleeve, 9. Through hole. Detailed Implementation

[0021] Implementation examples, by Figure 1-6 The present invention includes a syringe 1, a needle 2 inserted into the nipple at the bottom of the syringe 1, a piston 3 connected inside the syringe 1, a piston rod 4 fixedly connected to the top of the piston 3, the piston rod 4 being located inside the syringe 1 and extending above the syringe 1, a notch 5 being provided at the outer end of the piston rod 4, two left and right distributed baffles 6 being movably connected inside the notch 5 via a rotating shaft, a spring plate 7 being fixedly connected between the two baffles 6, the spring plate 7 being located at the center between the two baffles 6, the rotating shaft on the baffle 6 being located below the spring plate 7, a sleeve 8 being sleeved on the outer end of the piston rod 4, the sleeve 8 being located above the syringe 1, and the baffles 6 being located inside the sleeve 8.

[0022] The syringe 1 has a through hole 9 at the top, and the piston rod 4 passes through the through hole 9. Compared with traditional syringes, the end of the syringe 1 away from the nipple is designed to be sealed, but it has a through hole 9 for the piston rod 4 to pass through.

[0023] The two baffles 6 are symmetrically distributed around the central axis of the piston rod 4, and the outer side of the baffles 6 is adapted to the outer surface of the piston rod 4. The sleeve 8 is fitted onto the piston rod 4 so that the baffles 6 are housed in the notch 5 and will not protrude. During this period, the spring plate 7 is squeezed by the two baffles 6 and generates elastic force. The outer side of the baffles 6 is also arc-shaped and adapted to the outer surface of the piston rod 4 to form a complete cylinder, which can prevent the piston rod 4 from interfering with the top of the syringe 1 when pushing the injection.

[0024] Working principle:

[0025] When in use, pushing the piston rod 4 causes the piston 3 to push the hyaluronic acid liquid in the syringe 1 out from the needle 2 for injection. When the piston 3 and piston rod 4 move down to a certain extent, the sleeve 8 on the piston rod 4 will press against the top of the syringe 1, continuing to push for injection. Since the sleeve 8 is blocked and cannot move down further, the sleeve 8 will move up on the piston rod 4 as the piston rod 4 moves down, until the stop strip 6 on the piston rod 4 enters the syringe 1. At this time, the sleeve 8 no longer covers the stop strip 6, and the spring plate 7 between the two stop strips 6 will immediately push the two stop strips 6 away from each other. After the hyaluronic acid injection is completed, the piston rod 4 is blocked by the two stop strips 6 and cannot be pulled out in the opposite direction, so the entire syringe cannot be reused and can only be scrapped.

Claims

1. A syringe for hyaluronic acid injections comprising a barrel (1), characterized in that: The needle cylinder (1) is internally connected with a piston (3), the top of the piston (3) is fixedly connected with a piston rod (4), the piston rod (4) is located inside the needle cylinder (1) and extends above the needle cylinder (1), a notch (5) is formed in the outer end of the piston rod (4), two left and right distributed blocking strips (6) are movably connected with the notch (5) through rotating shafts, a spring sheet (7) is fixedly connected between the two blocking strips (6), a sleeve (8) is sleeved on the outer end of the piston rod (4), the sleeve (8) is located above the needle cylinder (1), and the blocking strips (6) are located inside the sleeve (8).

2. The syringe for hyaluronic acid injection according to claim 1, wherein The needle cylinder (1) is inserted with a needle (2) at the nipple of the bottom.

3. The syringe for hyaluronic acid injection according to claim 1, wherein A through hole (9) is formed in the top of the needle cylinder (1), and the piston rod (4) penetrates through the through hole (9).

4. The syringe for hyaluronic acid injection according to claim 1, wherein The spring sheet (7) is located at the center between the two blocking strips (6), and the rotating shafts on the blocking strips (6) are located below the spring sheet (7).

5. The syringe for hyaluronic acid injection according to claim 1, wherein The two blocking strips (6) are symmetrically distributed with the central axis of the piston rod (4), and the outer side of the blocking strips (6) is matched with the outer surface of the piston rod (4).

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