CN213252072U

CN213252072U - Painless needle

Info

Publication number: CN213252072U
Application number: CN202021337059.7U
Authority: CN
Inventors: 何沐雅; 卢雯
Original assignee: Hunan Cancer Hospital
Current assignee: Hunan Cancer Hospital
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-05-25
Anticipated expiration: 2030-07-09

Abstract

The embodiment of the application discloses painless needle includes: a push rod assembly comprising a push rod and a saline bag fixed to a first end of the push rod; the needle cylinder is a hollow cylinder with openings at two ends; the needle head assembly comprises a needle head seat, a plurality of superfine injection needles and a puncture needle, wherein a groove is formed in the needle head seat, the puncture needle is arranged at the bottom of the groove, and the superfine injection needles are fixed on the needle head seat and communicated with the groove; one end of the needle cylinder is fixed in the groove to form a semi-closed injection cavity, and the push rod can stretch and retract in the injection cavity; when the first end of the pushing rod is pushed to the end of the injection cavity close to the groove, the puncture needle can puncture the saline bag to release the saline. The painless needle has the advantage of thorough pesticide spraying.

Description

Painless needle

Technical Field

The embodiment of the application relates to a medical instrument, in particular to a painless needle.

Background

In the prior art, patients usually have two methods for taking drugs: (1) is administered orally. However, some drugs are easily decomposed and destroyed by gastric acid and digestive enzymes in the digestive tract, and the drug effect is reduced or lost. (2) By intramuscular or intravenous injection; generally, the injection is performed by inserting a hollow stainless steel long needle into the body, which causes pain to the patient, bleeding and infection due to improper treatment, and especially causes great pain to the patient who needs long-term injection (for example, diabetic).

In order to overcome the defects of the traditional hollow long needle injection device, designers develop devices adopting a transdermal drug delivery system, such as a micro solid silicon needle array, a metal microneedle array flexible patch and the like, so as to relieve the pain of injection. However, the injection needle is very small, so that the injection needle is difficult to load enough amount of medicine, and part of medicine remains in the syringe and is not injected into human body after part of medicine is injected, which easily causes that the blood concentration of a patient does not reach the standard.

Disclosure of Invention

The technical problem that this application embodiment will solve provides a painless needle of thorough laxative.

The embodiment of the application is realized by the following technical scheme:

a painless needle, comprising: a push rod assembly comprising a push rod and a saline bag fixed to a first end of the push rod; the needle cylinder is a hollow cylinder with openings at two ends; the needle head assembly comprises a needle head seat, a plurality of superfine injection needles and a puncture needle, wherein a groove is formed in the needle head seat, the puncture needle is arranged at the bottom of the groove, and the superfine injection needles are fixed on the needle head seat and communicated with the groove; one end of the needle cylinder is fixed in the groove to form a semi-closed injection cavity, and the push rod can stretch and retract in the injection cavity; when the first end of the pushing rod is pushed to the end of the injection cavity close to the groove, the puncture needle can puncture the saline bag to release the saline.

Further, the needle head assembly comprises a needle dial, the superfine injection needles are uniformly distributed on the needle dial, and the needle dial is communicated with the groove.

Furthermore, the top of superfine injection needle is formed with the injection opening, be formed with a plurality of injection trompils along the circumference on the needle body of superfine injection needle.

Further, the length of the ultrafine injection needle is 100 to 500 μm; and/or the diameter of the superfine injection needle is 50-100 μm; and/or the number of the ultrafine injection needles is 1 to 18.

Further, the push rod assembly comprises a push plate, and the push plate is fixed at a second end, far away from the physiological saline bag, of the push rod; the first end of the pushing rod is provided with a puncture needle abdicating hole, and when the first end of the pushing rod is pushed to one end of the injection cavity close to the groove, the puncture needle can puncture the saline bag and extend into the puncture needle abdicating hole.

Further, the first end of the pushing rod is recessed inwards to form the pricking pin abdicating hole, and a guide funnel structure is formed at one end, close to the saline water bag, of the pricking pin abdicating hole.

Furthermore, a guide part is formed on the inner wall of the needle cylinder, and a positioning part matched with the guide part is axially arranged on the push rod; when the guide part is matched with the positioning part, the puncture needle is aligned with the puncture needle abdicating hole.

Furthermore, one of the guide part and the positioning part is a sliding groove, one of the guide part and the positioning part is a sliding block, and the guide part is matched with the positioning part to limit the circumferential rotation of the push rod and allow the push rod to be capable of axially stretching and retracting in the injection cavity.

Further, the push rod is a plastic rod; and/or the needle cylinder is a glass cylinder or a plastic cylinder.

The beneficial effects are that:

compared with the prior art, the painless needle provided by the embodiment of the application is provided with the push rod assembly, the needle cylinder and the needle head assembly; the push rod component comprises a push rod and a normal saline bag fixed on the first end of the push rod, and quantitative normal saline is stored in the normal saline bag; the needle head assembly comprises a puncture needle, when the first end of the push rod is pushed to one end of the injection cavity body close to the groove, part of the medicine is injected into a human body, the puncture needle can puncture the normal saline bag to release normal saline, at the moment, the normal saline is mixed with a small amount of residual medicine again, and the residual medicine is brought into the human body by injecting the normal saline into the human body, so that the thorough pesticide spraying is ensured.

Drawings

The following detailed description of embodiments of the present application is provided in conjunction with the appended drawings, wherein:

FIG. 1 is a three-dimensional view of a painless needle of an embodiment of the application;

FIG. 2 is a schematic structural view of a push rod assembly according to an embodiment of the present application;

FIG. 3 is a schematic view of the structure of the syringe according to the embodiment of the present application;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a schematic view of a needle assembly according to an embodiment of the present application;

FIG. 6 is a view of the internal assembly of a painless needle according to an embodiment of the present application; wherein, the first end of pushing ram impels the one end that is close to the recess to the injection cavity, has left out guide part and location portion.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the embodiments of the present application, the embodiments of the present application are described in detail below with reference to the drawings, and the description in this section is only exemplary and explanatory, and should not have any limiting effect on the scope of the embodiments of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in fig. 6 or the orientation or positional relationships that a product of the embodiment of the present application is usually placed in when used, and are only used for convenience of describing the embodiment of the present application and simplifying the description, but do not indicate or imply that the device or element to be referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the embodiment of the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6, a painless needle includes: a drive ram assembly 1, a barrel 2 and a needle assembly 3.

The push rod assembly 1 comprises a push rod 11 and a normal saline bag 12 fixed on the first end of the push rod 11, and a fixed amount of normal saline is stored in the normal saline bag 12; the needle cylinder 2 is a hollow cylinder with two open ends; the needle assembly 3 comprises a needle seat 31, a plurality of ultrafine injection needles 32 and a puncture needle 33, wherein a groove 311 is formed on the needle seat 31, the puncture needle 33 is arranged at the bottom of the groove 311, and the plurality of ultrafine injection needles 32 are fixed on the needle seat 31 and are communicated with the groove 311.

One end of the needle cylinder 2 is fixed in the groove 311 to form a semi-closed injection cavity 4, and the push rod 11 can stretch and contract in the injection cavity 4; to effect the injection of the medicament.

When the first end of the pushing rod 11 is pushed to the end of the injection cavity 4 close to the groove 311, part of the medicine is injected into the human body, the puncture needle 33 can puncture the saline bag 12 to release the saline, and at this time, the saline is mixed with the residual small amount of medicine again, and the residual medicine is brought into the human body by injecting the saline into the human body, so that the thorough pesticide spraying is ensured.

One possible implementation manner, as shown in fig. 1, 5 and 6, the needle assembly 3 includes a needle dial 34, the plurality of ultrafine injection needles 32 are uniformly distributed on the needle dial 34, the distribution manner may be a circular array distribution, or a row of the plurality of ultrafine injection needles 32, the needle dial 34 is communicated with the groove 311, the plurality of ultrafine injection needles 32 are communicated with the groove 311 through the needle dial 34, so as to ensure that the pressure of the medicine in each ultrafine injection needle 32 is equal, and the medicine can be uniformly injected into the human body.

Dial 34 may be embedded in needle seat 31 as required, or may be disposed outside needle seat 31 and communicated with groove 311 via a pipeline, specifically based on design.

The saline is released by puncturing the saline bag 12, so that the medicine can be effectively prevented from remaining in the dial 34.

In one possible embodiment, as shown in fig. 1, 5 and 6, the top end of the ultra-fine injection needle 32 is formed with a medicine injection opening 321, and the body of the ultra-fine injection needle 32 is formed with a plurality of medicine injection openings 322 along the circumferential direction, so as to ensure that the medicine can be injected into the human body uniformly and omnidirectionally from the ultra-fine injection needle 32.

In one possible embodiment, the length of the ultra-fine injection needle 32 is 100 to 500 μm. The diameter of the ultra-fine injection needle 32 is 50 to 100 μm. The number of the ultrafine injection needles 32 is 1 to 18. The ultrafine injection needle 32 may be selected to be a micro solid silicon needle or a metal microneedle as required.

In one possible embodiment, as shown in FIGS. 1, 2, 5 and 6, the push rod assembly 1 includes a push plate 13, the push plate 13 being fixed to a second end of the push rod 11 away from the saline bag 12; the painless needle is conveniently held by a medical worker, and the push plate 13 pushes the push rod 11 to inject the medicine.

The first end of the pushing rod 11 is provided with a puncture needle abdicating hole 111, when the first end of the pushing rod 11 is pushed into one end of the injection cavity 4 close to the groove 311, the puncture needle 33 can puncture the saline bag 12 and extend into the puncture needle abdicating hole 111, so that the first end of the pushing rod 11 can be pushed into the bottom of the groove 311, the saline mixed with the medicine can be completely injected into the human body, and the medicine waste is avoided.

In one possible embodiment, as shown in fig. 1, 2, 5 and 6, the first end of the pushing rod 11 is recessed inwards to form a needle-off hole 111, and a guide funnel structure 111a is formed at one end of the needle-off hole 111 close to the saline bag 12, so as to guide the needle 33 entering the needle-off hole 111 after the needle 33 pierces the saline bag 12, and prevent the pushing rod 11 from being pushed off due to the position of the needle 33 deviating from the needle-off hole 111.

In a possible embodiment, as shown in fig. 1, 2, 5 and 6, a guide part 21 is formed on the inner wall of the needle cylinder 2, and a positioning part 112 which is matched with the guide part 21 is axially arranged on the push rod 11;

when the guide part 21 is matched with the positioning part 112, the puncture needle 33 is aligned with the puncture needle abdicating hole 111 along the axial direction, and the puncture needle 33 is prevented from deviating from the puncture needle abdicating hole 111 to cause that the push rod 11 can not push.

It can be understood that the matching form of the guiding portion 21 and the positioning portion 112 is various, and may be a sliding groove and sliding block structure, and may be a guide rail structure.

Specifically, taking a sliding chute slider as an example, one of the guide portion 21 and the positioning portion 112 is a sliding chute, one of the guide portion 21 and the positioning portion 112 is a slider, the guide portion 21 cooperates with the positioning portion 112 to limit circumferential rotation of the push rod 11, and allow the push rod 11 to axially extend and retract in the injection cavity 4, so as to avoid the position of the puncture needle 33 deviating from the puncture needle abdicating hole 111, ensure that the push rod 11 can effectively push to the bottom of the groove 311, so that the physiological saline mixed with the drug can be completely injected into the human body, and avoid drug waste.

In a possible embodiment, the pusher rod 11 is a plastic rod; and/or, the needle cylinder 2 is a glass cylinder or a plastic cylinder, so that the cost is low and the large-scale manufacturing is convenient.

The above embodiments are only used for illustrating the technical solutions of the present application and not for limiting the same, and any modification or equivalent replacement without departing from the spirit and scope of the embodiments of the present application should be covered within the technical solutions of the present application.

Claims

1. A painless needle, comprising:

the push rod component (1), the push rod component (1) comprises a push rod (11) and a physiological saline bag (12) fixed on the first end of the push rod (11);

the needle cylinder (2), the needle cylinder (2) is a hollow cylinder with two open ends;

and the needle assembly (3), the needle assembly (3) comprises a needle seat (31), a plurality of superfine injection needles (32) and a puncture needle (33), a groove (311) is formed on the needle seat (31), the puncture needle (33) is arranged at the bottom of the groove (311), and the superfine injection needles (32) are fixed on the needle seat (31) and are communicated with the groove (311);

one end of the needle cylinder (2) is fixed in the groove (311) to form a semi-closed injection cavity (4), and the push rod (11) can stretch and retract in the injection cavity (4);

when the first end of the pushing rod (11) is pushed to the end of the injection cavity (4) close to the groove (311), the puncture needle (33) can puncture the saline bag (12) to release the saline.

2. A painless needle as claimed in claim 1, characterized in that: the needle head assembly (3) comprises a needle dial (34), a plurality of ultrafine injection needles (32) are uniformly distributed on the needle dial (34), and the needle dial (34) is communicated with the groove (311).

3. A painless needle as claimed in claim 1, characterized in that: the top of superfine injection needle (32) is formed with injection opening (321), be formed with a plurality of injection trompils (322) along circumference on the needle body of superfine injection needle (32).

4. A painless needle as claimed in claim 1 or 2 or 3 wherein: the length of the superfine injection needle (32) is 100 to 500 mu m; and/or the presence of a gas in the gas,

the diameter of the superfine injection needle (32) is 50-100 μm; and/or the presence of a gas in the gas,

the number of the ultrafine injection needles (32) is 1 to 18.

5. A painless needle as claimed in claim 1, characterized in that: the push rod component (1) comprises a push plate (13), and the push plate (13) is fixed at the second end, far away from the physiological saline bag (12), of the push rod (11);

the first end of the pushing rod (11) is provided with a puncture needle abdicating hole (111), and when the first end of the pushing rod (11) is pushed to one end of the injection cavity (4) close to the groove (311), the puncture needle (33) can puncture the physiological saline bag (12) and extend into the puncture needle abdicating hole (111).

6. A painless needle as claimed in claim 5, characterized in that: the first end of the pushing rod (11) is inwards recessed to form the puncture needle abdicating hole (111), and a guide funnel structure (111 a) is formed at one end of the puncture needle abdicating hole (111) close to the physiological saline bag (12).

7. A painless needle as claimed in claim 5, characterized in that: a guide part (21) is formed on the inner wall of the needle cylinder (2), and a positioning part (112) matched with the guide part (21) is axially arranged on the push rod (11);

when the guide part (21) is matched with the positioning part (112), the puncture needle (33) is aligned with the puncture needle abdicating hole (111).

8. A painless needle as claimed in claim 7, wherein: one of the guide part (21) and the positioning part (112) is a sliding groove, one of the guide part (21) and the positioning part (112) is a sliding block, and the guide part (21) and the positioning part (112) are matched to limit circumferential rotation of the push rod (11) and allow the push rod (11) to be capable of axially extending and retracting in the injection cavity (4).

9. A painless needle as claimed in claim 1, characterized in that: the push rod (11) is a plastic rod; and/or the needle cylinder (2) is a glass cylinder or a plastic cylinder.