CN218899798U

CN218899798U - Needle cover and syringe

Info

Publication number: CN218899798U
Application number: CN202221758105.XU
Authority: CN
Inventors: 胡漫; 丁行晨; 张贤彬; 李成
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2023-04-25
Anticipated expiration: 2032-07-08

Abstract

The utility model discloses a needle cover and an injector, which relate to the technical field of bioengineering and comprise a main body part, wherein a perforation is formed in the main body part, two ends of the main body part are respectively provided with a first limit part and a second limit part, the perforation can be arranged on a needle head of the injector in a penetrating way, the needle head of the injector can extend out of the perforation, the first limit part can prevent the main body part from moving along the axial direction of the needle head of the injector to a direction close to a needle cylinder of the injector, and the second limit part can limit the insertion depth of the needle head of the injector relative to an injected object. The length of the needle is blocked by the first limiting part and the second limiting part, so that the insertion depth of the needle into an injected object is controlled, the injection depth of the needle is controllable, and the operation is simple.

Description

Needle cover and syringe

Technical Field

The utility model relates to the technical field of bioengineering, in particular to a needle cover and an injection device.

Background

Gliobastoma (GBM) is the most common central nervous system malignancy. Although in the last decade, in addition to traditional therapies, various approaches have been explored to improve the treatment of GBM, such as targeting the immune system of the body through gene therapy, viral vectors, and targeted drug therapies. Unfortunately, the median survival of GBM patients remains only 15-17 months. Thus, increasing the survival rate of GBM patients has been elusive.

The improvement of early diagnosis standard rate and the search of new treatment schemes are the hot spot problems of the current research, and the primary point of the research on glioma is to establish an accurate and reliable glioma model, namely, to establish a glioblastoma mouse model by transplanting a graft sample of glioblastoma cells in situ into the brain of an immunodeficiency mouse. The existing mouse tumor injector needle is long, the penetration depth of the mouse skull can be judged only by feel and experience, the operation difficulty is high, and the penetration depth of the needle is uncontrollable.

Disclosure of Invention

The utility model aims to provide a needle cover and an injector, which are used for solving the problems in the prior art, and the injection depth of the needle is controllable and the operation is simple.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a needle sleeve, which comprises a main body part, wherein a perforation is formed in the main body part, a first limit part and a second limit part are respectively arranged at two ends of the main body part, the perforation can be arranged on a needle head of an injector in a penetrating way, the needle head of the injector can extend out of the perforation, the first limit part can prevent the main body part from moving along the axial direction of the needle head of the injector towards the direction close to a needle cylinder of the injector, and the second limit part can limit the insertion depth of the needle head of the injector relative to an injected object.

Preferably, the outer side wall of the main body member is conical.

Preferably, the length of the body member in the axial direction of the syringe needle can be set to different lengths.

The utility model also provides an injector, which comprises a needle cylinder, a push rod device, a needle head and any needle sleeve, wherein the needle cylinder is provided with a first cavity, a first opening and a second opening which are communicated with the first cavity, the inner diameter of the first opening is smaller than that of the second opening, one end of the needle head is fixedly connected and communicated with the first opening, one end of the push rod device is slidably arranged in the first cavity and can divide the first cavity into two parts, one part close to the first opening is an injection cavity, the outer diameter of one end of the push rod device close to the first opening is larger than that of the first opening, one end of the push rod device far away from the first opening extends out of the first cavity, the main body piece is arranged on the needle head in a penetrating mode, and the size of the injection cavity can be changed when the push rod device slides relative to the needle cylinder.

Preferably, the push rod device comprises a push rod and a piston, the piston is fixedly arranged at one end of the push rod, and when the push rod is used, one end, connected with the piston, of the push rod is inserted into the first cavity, the piston is in sealing connection with the inner side wall of the first cavity, and the piston can form the injection cavity with one side, close to the first opening, of the first cavity.

Preferably, the needle cylinder is further fixedly provided with a first fixing block at one end far away from the needle head, the first fixing block is provided with a through hole which is communicated with the first cavity and can enable the push rod to pass through, and the outer diameter of the first fixing block is larger than that of the needle cylinder.

Preferably, the through hole is provided with an internal thread, an external thread is arranged on the side wall of one end of the push rod far away from the piston, the external thread and the internal thread can be in threaded connection, and the outer diameter of the push rod without the external thread is smaller than the inner diameter of the internal thread.

Preferably, one end of the push rod, which is far away from the piston, is also fixedly connected with a second fixing block.

Compared with the prior art, the utility model has the following technical effects:

according to the needle sleeve provided by the utility model, the length of the needle is blocked by the first limiting part and the second limiting part, so that the insertion depth of the needle into an injected object is controlled, the injection depth of the needle is controllable, and the operation is simple.

Furthermore, the outer side wall of the main body part is conical, so that an operator can conveniently take the main body part, and the self weight of the main body part is reduced.

Further, the length of the main body part can be set to be different in length, and the control of different extending lengths of the control needle head can be realized by changing different main body parts, so that the structure is simple and the operation is convenient.

The utility model also provides an injector, which is characterized in that the main body part is arranged on the needle in a penetrating way, so that the insertion depth of the needle to an injected object is controlled, the injection depth of the needle is controllable, and the injection depth precision is ensured.

Furthermore, the piston can ensure stable injection of the injection, and the push rod is convenient for operators to inject and extract the injection.

Further, the first fixing block is convenient for an operator to hold with one hand and fingers.

Furthermore, the push rod is connected with the threads on the through hole, so that the injection speed is more uniform and stable, and the injection is stably and reliably injected into the designated position.

Further, the second fixing block is convenient for an operator to push the push rod to move.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a needle cover provided by the present utility model;

FIG. 2 is a schematic view of the overall structure of the syringe according to the present utility model;

fig. 3 is an exploded view of a part of the structure of the syringe according to the present utility model.

In the figure: 100-needle cover; 200-syringe; 1-a body member; 2-perforating; 3-needle cylinder; 4-a push rod device; 5-a needle; 6-a first fixed block; 7-a second fixed block.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Example 1

The embodiment provides a needle cover 100, as shown in fig. 1, including a main body 1, a perforation 2 is provided in the main body 1, two ends of the main body 1 are respectively provided with a first limit portion and a second limit portion, the perforation 2 can be arranged on a needle 5 of an injector 200 in a penetrating manner, the needle 5 of the injector 200 can extend out of the perforation 2, the first limit portion can block the main body 1 from moving along an axial direction of the needle 5 of the injector 200 towards a direction close to a needle cylinder 3 of the injector 200, and the second limit portion can limit an insertion depth of the needle 5 of the injector 200 relative to an injected object. The length of the needle 5 is blocked by the first limiting part and the second limiting part, so that the insertion depth of the needle 5 into an injected object is controlled, the injection depth of the needle 5 is controllable, and the operation is simple.

Specifically, the first limiting part and the second limiting part are formed by two ends of the main body part 1 respectively with different sizes with the outer diameter of the needle head.

In the alternative of this embodiment, it is preferable that the outer side wall of the body member 1 is conical as shown in fig. 1. The outer side wall of the main body part 1 is conical, so that an operator can conveniently take the main body part, and the self weight of the main body part 1 is reduced.

In the alternative of this embodiment, the outer side wall of the main body 1 may be preferably configured in a duckbill shape, and the outer side wall may be configured in other shapes suitable for being held by an operator.

In the alternative of this embodiment, it is preferable that the length of the body member 1 in the axial direction of the needle 5 of the syringe 200 can be set to different lengths. The length of the main body part 1 can be set to be different lengths, and the control of different extension lengths of the control needle 5 can be realized by changing different main body parts 1, so that the structure is simple and the operation is convenient.

Specifically, for the injection of mice, the length of the exposed needle is 3mm after the main body part 1 is sleeved on the needle of the injector, and for the injection of rats, the length of the exposed needle is 5mm after the main body part 1 is sleeved on the needle of the injector.

Example two

This embodiment provides an injector 200, as shown in fig. 2 and 3, including a syringe 3, a push rod device 4, a needle 5 and a needle cover 100 as in the first embodiment, the syringe 3 has a first cavity and a first opening and a second opening communicating with the first cavity, the inner diameter of the first opening is smaller than the inner diameter of the second opening, one end of the needle 5 is fixedly connected and communicated with the first opening, one end of the push rod device 4 is slidably arranged in the first cavity and can divide the first cavity into two parts, one part close to the first opening is an injection cavity, the outer diameter of one end of the push rod device 4 close to the first opening is larger than the inner diameter of the first opening, one end of the push rod device 4 far away from the first opening extends out of the first cavity, the main body part 1 is arranged on the needle 5 in a penetrating manner, and the size of the injection cavity can be changed when the push rod device 4 slides relative to the syringe 3. The main body piece 1 is arranged on the needle head 5 in a penetrating way, so that the insertion depth of the needle head 5 to an injected object is controlled, the injection depth of the needle head 5 is controllable, and the injection depth precision is ensured.

In the alternative of this embodiment, preferably, the push rod device 4 includes a push rod and a piston, the piston is fixedly disposed at one end of the push rod, and when in use, one end of the push rod connected with the piston is inserted into the first cavity, the piston is in sealing connection with the inner side wall of the first cavity, and the piston can form an injection cavity with one side of the first cavity close to the first opening. The piston can ensure the stable injection of the injection, and the setting of the push rod is convenient for operators to inject and extract the injection.

In the alternative of this embodiment, as shown in fig. 2 and 3, preferably, the end of the syringe 3 away from the needle 5 is further fixedly provided with a first fixing block 6, the first fixing block 6 is provided with a through hole which is communicated with the first cavity and through which the push rod can pass, and the outer diameter of the first fixing block 6 is larger than the outer diameter of the syringe 3. The first fixing block 6 is arranged to facilitate the holding of the operator with fingers of one hand.

In an alternative of this embodiment, preferably, the material of the first fixing block 6 is a metal material.

In the alternative scheme of this embodiment, more preferably, be provided with the internal thread on the through-hole, be provided with the external screw thread on the one end lateral wall that the piston was kept away from to the push rod, external screw thread and internal screw thread can threaded connection, and the external diameter of the push rod that does not have the external screw thread is less than the internal diameter of internal screw thread, and the part that does not have the screw thread on the push rod can slide in the internal screw hole and be unimpeded. The push rod is connected with the threads on the through hole, so that the injection speed is more uniform and stable, and the injection is stably and reliably injected into the appointed position.

In an alternative of this embodiment, preferably, the end of the push rod away from the piston is further fixedly connected with a second fixing block 7. The second fixing block 7 is arranged to facilitate the movement of the push rod by an operator.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. A needle cover, characterized in that: the novel syringe comprises a main body part, wherein a perforation is formed in the main body part, a first limiting part and a second limiting part are respectively arranged at two ends of the main body part, the perforation can be arranged on a needle head of the syringe in a penetrating mode, the needle head of the syringe can extend out of the perforation, the first limiting part can block the main body part to move along the axial direction of the needle head of the syringe towards the direction close to a syringe needle cylinder, and the second limiting part can limit the insertion depth of the needle head of the syringe relative to an injected object.

2. The needle cover according to claim 1, wherein: the outer side wall of the main body piece is conical.

3. The needle cover according to claim 1, wherein: the length of the body member in the axial direction of the syringe needle can be set to different lengths.

4. An injector, characterized in that: the needle head sleeve comprises a needle cylinder, a push rod device, a needle head and the needle head sleeve according to any one of claims 1-3, wherein the needle cylinder is provided with a first cavity, a first opening and a second opening, the first opening is communicated with the first cavity, the inner diameter of the first opening is smaller than that of the second opening, one end of the needle head is fixedly connected with and communicated with the first opening, one end of the push rod device is slidably arranged in the first cavity and can divide the first cavity into two parts, one part close to the first opening is an injection cavity, the outer diameter of one end of the push rod device close to the first opening is larger than that of the first opening, one end of the push rod device far away from the first opening extends out of the first cavity, the main body piece is arranged on the needle head in a penetrating mode, and the size of the injection cavity can be changed when the push rod device slides relative to the needle cylinder.

5. The syringe of claim 4, wherein: the push rod device comprises a push rod and a piston, the piston is fixedly arranged at one end of the push rod, and when the push rod is used, one end, connected with the piston, of the push rod is inserted into the first cavity, the piston is in sealing connection with the inner side wall of the first cavity, and the piston can form an injection cavity with one side, close to the first opening, of the first cavity.

6. The syringe of claim 5, wherein: the needle cylinder is far away from the one end of syringe needle still fixedly is provided with first fixed block, first fixed block offer with first cavity intercommunication and can make the through-hole that the push rod passed, the external diameter of first fixed block is greater than the external diameter of syringe.

7. The syringe of claim 6, wherein: the through hole is provided with an internal thread, the side wall of one end of the push rod far away from the piston is provided with an external thread, the external thread and the internal thread can be in threaded connection, and the outer diameter of the push rod without the external thread is smaller than the inner diameter of the internal thread.

8. The syringe of claim 5, wherein: and one end of the push rod, which is far away from the piston, is fixedly connected with a second fixing block.