Threaded self-locking hydrogel wound dressing injector

Abstract

The utility model discloses a thread type self-locking hydrogel wound dressing injector, which belongs to the technical field of injectors, comprises an injection needle cylinder, a reciprocating piston is arranged in the injection needle cylinder, and the piston is arranged at the end part of a push rod, and is characterized in that a section is arranged on the side wall of the push rod along the depth direction, scales are arranged on the section, and the scales are arranged on the section. The side wall of the push rod is provided with external threads, the outer side of the side wall of the push rod is in threaded connection with an adjusting nut, and the push rod is in threaded connection with the end cover through the external threads; the utility model has the beneficial effects that the purpose of accurate sampling is realized, locking can be realized at an adjustable sampling end point, repeated operation is not needed, secondary utilization by other people is also avoided, and scales, a self-locking structure and an adjusting nut arranged on the injector are all positioned on the outer side of the cavity of the injection needle cylinder loaded with hydrogel, so that the self-locking structure and the adjusting nut are convenient to use. And hydrogel sterilization is not influenced.

Description

Technical field:

[0001] The utility model belongs to the technical field of syringes, and more specifically relates to a threaded self-locking hydrogel wound dressing syringe. Background technology:

[0002] Hydrogel is a type of extremely hydrophilic three-dimensional network structure gel that swells rapidly in water and can retain a large volume of water in this swollen state without dissolving.

[0003] Due to the presence of a cross-linked network, hydrogels can swell and hold large amounts of water, and the amount of water absorbed is closely related to the degree of cross-linking. The higher the degree of cross-linking, the lower the water absorption. This property is very similar to a soft tissue. The water content in a hydrogel can be as low as a few percent or as high as 99%. The aggregate state of the gel is neither completely solid nor completely liquid. The behavior of a solid is that it can maintain a certain shape and volume under certain conditions, and the behavior of a liquid is that solutes can diffuse or penetrate through the hydrogel.

[0004] Hydrogel wound dressings are made of hydrogels and have good water retention and biocompatibility. Hydrogel wound dressings are usually transparent or translucent, soft in texture, and can be shaped according to the shape and size of the wound to better fit the wound surface. This material can be used to treat a variety of wounds, including surgical incisions, abrasions, burns, ulcers, etc.

[0005] Hydrogel wound dressings can absorb wound exudate, keep the wound moist, facilitate wound healing, and shorten healing time. Since hydrogel has good air permeability and waterproofness, it can reduce the risk of wound infection. It can also reduce the friction between the wound and the outside world and relieve wound pain. In general, hydrogel wound dressings are safe, effective, and comfortable wound dressings that can be used to treat various wounds, helping to promote wound healing, reduce the risk of infection, and relieve pain.

[0006] Since the dosage of hydrogel wound dressings needs to be determined according to the size of the patient's wound area, using too much or too little will affect wound healing. Therefore, hydrogel wound dressings currently also have products that use syringes to load, and can accurately take the amount according to the scale of the syringe. Hydrogel wound dressings are generally sterilized products for medical devices, so they must be used once after opening the package and cannot be used a second time. Therefore, the syringe used as a sampler for hydrogel wound dressings is mostly a disposable item. However, there are some greedy people who recycle used syringes, and then use them a second time after simple processing, which seriously endangers the health of consumers.

[0007] There are some syringes with self-locking function on the market, but the complex self-locking structure increases the difficulty of aseptic production in the hydrogel wound dressing process. Moreover, the current syringes with self-locking function cannot achieve quantitative sampling, and careless operation can easily lead to large deviations in sampling. Utility model content:

[0008] In order to solve the above problems and overcome the shortcomings of the prior art, the utility model provides a threaded self-locking hydrogel wound dressing syringe;

[0009] The first technical problem to be solved is: there are some syringes with self-locking function on the market, but the complex self-locking structure increases the difficulty of aseptic production in the hydrogel production process, and the current syringes with self-locking function cannot achieve quantitative sampling, and careless operation can easily lead to large deviations in sampling.

[0010] The specific technical solution of the utility model to solve the above technical problems is as follows: the threaded self-locking hydrogel wound dressing syringe comprises an injection syringe, a piston for reciprocating motion is arranged in the injection syringe, and the piston is arranged at the end of the push rod, characterized in that: the injection syringe is provided with an end cover through a threaded connection, the push rod passes through the end cover and extends to the outside, and the end of the push rod is connected with a rotating head;

[0011] The side wall of the push rod is provided with a cross section along the depth direction, and a scale is provided on the cross section. The side wall of the push rod is provided with an external thread, and an adjusting nut is provided on the outer side of the side wall of the push rod through a threaded connection. The push rod is threadedly connected to the end cover through the external thread;

[0012] The adjusting nut is connected to the end cover through a self-locking structure.

[0013] Furthermore, the self-locking structure includes a self-locking inner buckle and an undercut outer extension edge.

[0014] Furthermore, the self-locking inner buckle or undercut outer extension edge is respectively arranged on the adjusting nut or the end cover.

[0015] Furthermore, a slot is provided on the end surface of the end cover, the adjusting nut is embedded in the slot, a boss is provided on the bottom surface of the slot, and an undercut outer extension is provided on the side wall of the boss.

[0016] Furthermore, a groove is provided on the bottom end surface of the adjusting nut, and a self-locking inner buckle that cooperates with the outer extension edge of the undercut is provided on the inner wall of the groove.

[0017] The beneficial effects of the utility model are:

[0018] One advantage of the utility model is that the syringe with a push rod having an adjusting nut can adjust the sampling volume, thereby achieving the purpose of accurate sampling. At the same time, the adjusting nut and the end cover are connected through a self-locking structure, which can be locked at the adjustable sampling end point without the need for repeated operations and avoiding secondary use by others.

[0019] One advantage of the utility model is that the scale, self-locking structure and adjusting nut provided on the syringe are all located outside the injection syringe cavity loaded with the hydrogel, which will not affect the sterilization of the hydrogel. Description of the drawings:

[0020] Attached Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0021] Attached Figure 2 This is a schematic diagram of the structure of the first implementation state of the utility model;

[0022] Attached Figure 3 It is a structural schematic diagram of the second implementation state of the utility model;

[0023] Attached Figure 4 This is a schematic diagram of the structure of the adjusting nut of the utility model;

[0024] Attached Figure 5 This is a schematic diagram of the self-locking structure of the utility model; in the accompanying drawings:

[0025] 1. Injection syringe; 2. End cap; 3. Self-locking structure; 4. Piston; 5. Piston connector; 6. Adjusting nut; 7. External thread; 8. Scale; 9. Push rod; 10. Rotating head; 11. Self-locking inner buckle; 12. Inverted outer extension edge; 13. Boss. Specific implementation method:

[0026] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] The specific implementation mode of the utility model: the threaded self-locking hydrogel wound dressing syringe comprises an injection syringe 1, a piston 4 for reciprocating motion is arranged in the injection syringe 1, and the piston 4 is arranged at the end of a push rod 9, characterized in that: the injection syringe 1 is provided with an end cover 2 through a threaded connection, the push rod 9 passes through the end cover 2 and extends to the outside, and the end of the push rod 9 is connected with a rotating head 10;

[0028] The side wall of the push rod 9 is provided with a cross section along the depth direction, and a scale 8 is provided on the cross section. The side wall of the push rod 9 is provided with an external thread 7. An adjusting nut 6 is provided on the outer side of the side wall of the push rod 9 through a threaded connection. The push rod 9 is threadedly connected to the end cover 2 through the external thread 7.

[0029] The adjusting nut 6 is connected to the end cover 2 through a self-locking structure 3 .

[0030] Furthermore, the self-locking structure 3 includes a self-locking inner buckle 11 and an undercut outer extension 12 .

[0031] Furthermore, the self-locking inner buckle 11 or the undercut outer extension 12 are respectively arranged on the adjusting nut 6 or the end cover 2.

[0032] Furthermore, a slot is provided on the end surface of the end cover 2 , and the adjusting nut 6 is embedded in the slot. A boss 13 is provided on the bottom surface of the slot, and an undercut outer extension 12 is provided on the side wall of the boss 13 .

[0033] Furthermore, a groove is provided on the bottom end surface of the adjusting nut 6 , and a self-locking inner buckle 11 matching with the undercut outer extension 12 is provided on the inner wall of the groove.

[0034] It should be noted that the utility model is a threaded self-locking hydrogel wound dressing syringe.

[0035] 1. When using, according to the actual amount of hydrogel used, rotate the adjusting nut 6 and adjust the adjusting nut 6 to the required scale according to the scale 8.

[0036] 2. At this time, one hand holds the injection syringe 1 tightly, and the other hand rotates the rotating head 10. At this time, the rotating head 10 drives the push rod 9 to rotate. Since the push rod 9 is threadedly connected to the end cover 2, the piston connector 5 and the push rod 9 drive the piston 4 to move forward to achieve the extrusion of the hydrogel.

[0037] 3. The adjusting nut 6 moves forward with the push rod 9. When the self-locking inner buckle 11 contacts the undercut outer edge 12, the self-locking inner buckle 11 squeezes the undercut outer edge 12 by force, changes its nature and passes over the undercut outer edge 12, and realizes self-locking by using the inverted tooth structure of the undercut outer edge 12.

[0038] At this time, the slot depth of the adjusting nut 6 is consistent with the height of the boss 13 in the slot of the end cover 2, so that accurate sampling can be achieved at the adjustable sampling end point to achieve locking, without the need for repeated operations, and also avoiding secondary use by others.

[0039] Furthermore, the scale 8, the self-locking structure 3 and the adjusting nut 6 provided on the syringe are all located outside the cavity of the injection syringe 1 loaded with the hydrogel, and will not affect the sterilization of the hydrogel.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A threaded self-locking hydrogel wound dressing syringe, comprising an injection syringe (1), wherein a reciprocating piston (4) is arranged in the injection syringe (1), and the piston (4) is arranged at the end of a push rod (9), characterized in that: The injection syringe (1) is provided with an end cover (2) through a threaded connection, the push rod (9) passes through the end cover (2) and extends to the outside, and the end of the push rod (9) is connected to a rotating head (10); The side wall of the push rod (9) is provided with a cross section along the depth direction, and a scale (8) is provided on the cross section. The side wall of the push rod (9) is provided with an external thread (7). An adjusting nut (6) is provided on the outer side of the side wall of the push rod (9) through a threaded connection. The push rod (9) is threadedly connected to the end cover (2) through the external thread (7). The adjusting nut (6) is cooperatively connected to the end cover (2) via a self-locking structure (3).

2. The threaded self-locking hydrogel wound dressing syringe according to claim 1, characterized in that The self-locking structure (3) comprises a self-locking inner buckle (11) and an undercut outer extension edge (12).

3. The threaded self-locking hydrogel wound dressing syringe according to claim 2, characterized in that The self-locking inner buckle (11) or the undercut outer extension (12) is respectively arranged on the adjusting nut (6) or the end cover (2).

4. The threaded self-locking hydrogel wound dressing syringe according to claim 3, characterized in that A slot is provided on the end surface of the end cover (2), the adjusting nut (6) is embedded in the slot, a boss (13) is provided on the bottom surface of the slot, and an undercut outer extension (12) is provided on the side wall of the boss (13).

5. The threaded self-locking hydrogel wound dressing syringe according to claim 4, characterized in that The bottom end surface of the adjusting nut (6) is provided with a slot, and the inner wall of the slot is provided with a self-locking inner buckle (11) that cooperates with the undercut outer extension edge (12).

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