CN215386578U - Disposable syringe needle capable of avoiding repeated use - Google Patents

Abstract

The application provides a disposable injection needle capable of avoiding repeated use, and belongs to the technical field of injectors. The disposable injection needle capable of avoiding reuse comprises a needle cylinder, a piston piece and a needle head. The needle cylinder comprises a cylinder body and a connector, wherein the cylinder body and the connector are of an integrally formed structure, and the cylinder body and the connector are communicated with each other. The piston member includes a piston rod and a piston. Increase the jack catch in the pintle inside in this application and be used for blocking the structure of installing at the piston tip, when the injection impeld barrel inside bottom completely, the jack catch can block the article of piston tip completely, and then blocks up the needle stalk, avoids syringe needle secondary use. The plug corresponds to the jack catch of pintle inside wall, and when the injection pushed into barrel inside bottom completely, the plug can the joint at the jack catch inboard completely, and jack catch front end inclined plane is used for guiding the plug to get into, and jack catch rear end curved surface is used for blocking the plug, prevents that the plug pine from taking off, blocks up syringe needle subassembly, prevents the secondary and uses the syringe.

Description

Disposable syringe needle capable of avoiding repeated use

Technical Field

The application relates to the technical field of syringes, in particular to a disposable injection needle capable of avoiding repeated use.

Background

The most feared of the world's blood-borne diseases is AIDS. According to the survey and statistics of the world health organization, the number of AIDS patients in the world is over 3600 ten thousands, and the health of human beings in the world is seriously threatened. The common injection appliance ranks the front in the AIDS transmission way, has the chief culmination, and the way of repeatedly using the injection appliance is cut off to become an important work of human AIDS resistance. In order to prevent the infection caused by the repeated use of the syringe, various self-destruction syringes have been invented.

However, the above solution still has certain disadvantages, and the inventor finds that the injector in this form has the following problems through research: the existing self-destruction injector can pull the core rod outwards forcibly, and the core rod can be pulled out frequently, so that parts of each part are easily recycled by illegal vendors, and infection danger is easily caused.

How to invent a disposable injection needle which can avoid repeated use to improve the problems becomes a problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to make up for above not enough, this application provides a disposable syringe needle that can avoid used repeatedly, aims at improving current self-destruction syringe, and the core bar is drawn outward hard, often can also be drawn out the core bar, leads to each part to be recycled by illegal vendor easily, holds the dangerous problem of infection.

The embodiment of the application provides a disposable injection needle capable of avoiding repeated use, which comprises a needle cylinder, a piston piece and a needle head.

In the above implementation process, the combination of the syringe and the piston member is used for sucking the liquid medicine to be injected, and the needle is used for assisting in sucking the liquid medicine and injecting the liquid medicine into the target when necessary.

The needle cylinder comprises a cylinder body and a connector, wherein the cylinder body and the connector are of an integrally formed structure, and the cylinder body and the connector are communicated with each other.

In the implementation process, the needle cylinder component comprises a cylinder body and a connector, wherein the cylinder body is used for storing liquid medicine, so that the liquid medicine is conveniently sucked and injected into a target body, and the connector is used for being matched with the needle head component to maintain the stability of the position of the needle head component, so that the target is conveniently injected.

The piston piece comprises a piston rod and a piston, the piston is movably inserted into the inner wall of the cylinder, the piston rod is installed at one end of the piston, the end part of the piston is located on one side of the joint, the piston rod is located on the inner side of the cylinder, and the end part of the piston is provided with an arc-shaped edge structure matched with the end part of the joint.

In the above-mentioned realization process, the piston is the rubber material for cooperation shutoff cylinder maintains the inside closure of cylinder part, conveniently absorbs the liquid medicine, avoids the liquid medicine to reveal, and the piston rod tip is linked with the piston, can promote the piston and move in cylinder inside, maintains the stability of absorbing the liquid medicine process.

The needle head comprises a pintle, a needle stem and a needle point, the needle point is integrally formed at the end part of the needle stem, one end of the needle stem is fixedly arranged in the middle of the pintle, and the pintle is fixedly arranged on the inner wall of the joint.

In the implementation process, the pintle is used for fixing the needle stem, and meanwhile, the pintle is arranged on the inner wall of the joint, so that the stability of the relative position of the needle stem provided with the needle point can be maintained, and the injection work is convenient.

In a specific implementation scheme, the joint inner side wall is provided with a clamping head, the pintle outer side wall is provided with a bayonet structure matched with the clamping head, and the end part of the clamping head is clamped in the bayonet of the pintle side wall.

In the implementation process, the clamping head is additionally arranged on the inner wall of the connector, the pintle is hermetically arranged on the inner wall of the connector, the clamping head can limit the pintle, the position of the pintle is maintained to be stable, the needle part is prevented from loosening during injection, and the injection can be safely carried out.

In a specific embodiment, the inside wall of the pintle is provided with a claw, one side of the claw is of an inclined surface structure, and the inclined surface of the side wall of the claw extends to the end part of the inside wall of the pintle.

In the implementation process, the clamping jaw is additionally arranged on the inner side wall of the pintle and used for clamping the structure arranged at the end part of the piston, and when the injection is completely pushed into the bottom of the inner side of the cylinder, the clamping jaw can completely clamp the object at the end part of the piston, so that the needle stem is blocked, and the secondary use of the injection needle is avoided.

In a specific embodiment, a plug is arranged at the end of the piston, the end of the plug is of an arc-shaped structure, the plug is positioned at one side of the joint, and the outer diameter of the plug is slightly larger than the inner diameter of the pintle.

In the implementation process, the plug is additionally arranged at the end part of the piston and corresponds to the clamping jaw on the inner side wall of the pintle, when the injection is completely pushed into the bottom of the inner side of the barrel, the plug can be completely clamped on the inner side of the clamping jaw, the inclined plane at the front end of the clamping jaw is used for guiding the plug to enter, and the curved surface at the rear end of the clamping jaw is used for clamping the plug, so that the plug is prevented from loosening, the needle head part is blocked, and the secondary use of the injector is prevented.

In a specific embodiment, the outer side wall of the pintle is provided with a clamping strip, the inner side wall of the joint is provided with a clamping groove matched with the clamping strip, and the end part of the clamping strip is tightly inserted in the middle of the clamping groove.

In the above-mentioned realization in-process, increase card strip structure at the pintle lateral wall, corresponding with it increase with card strip assorted draw-in groove in connecting the inside wall, when the installation pintle, the pintle conveniently packs into and connects the inboard under the guide of the draw-in groove of lateral wall card strip and joint inner wall, and can play spacing effect to the pintle, prevents that the pintle part from taking place the side direction and rotating when using, maintains the stability of pintle part position.

In a specific implementation scheme, a handle piece is arranged on one side of the barrel, the number of the handle pieces is two, the handle pieces are symmetrically arranged, and anti-skid lines are arranged on the side wall of each handle piece.

In the implementation process, the handle piece is additionally arranged on the side wall of the barrel and used for supporting during injection, so that the barrel is convenient to hold and stabilize, and the injection operation can be more stable.

In a specific embodiment, a piston handle is installed at one end of the piston rod, the piston handle is located on the outer side of the cylinder, and the outer diameter of the piston handle is larger than that of the middle through hole of the cylinder.

In the implementation process, the piston handle is arranged at the end part of the piston rod and used for assisting in pushing the piston rod, so that the stress area is increased, and the pressure of the piston rod on the hand is dispersedly pushed.

In a specific embodiment, the side wall of the cylinder body is provided with a scale strip, and the scale line of the scale strip is equal to the side line of the side wall of the piston.

In the implementation process, the scale lath arranged on the side wall of the cylinder body is used for observing the volume of the liquid medicine sucked currently, so that the precision of the liquid medicine injected to the patient is improved.

In a specific embodiment, the end of the joint is clamped with a needle sleeve, the needle sleeve is sleeved outside the needle stem and the needle point, the end of the needle sleeve is provided with a through hole structure, and the through hole at the end of the needle sleeve is matched with the needle point.

In the implementation process, the needle sleeve is arranged at the end part of the joint and used for protecting the needle head part, so that the influence of stress deformation on the needle head part on use is avoided, and meanwhile, the needle point of the needle head can be prevented from accidentally stabbing a user.

In a specific embodiment, the pintle is sealingly mounted to the inside wall of the fitting, and the pintle end does not protrude beyond the inside wall of the fitting.

In the above-mentioned realization process, with pintle seal installation at the joint inside wall, can avoid pintle and joint to reveal the liquid medicine, guarantee that the liquid medicine can stably inject into the target internal, also can avoid external environment to produce the influence to the inside liquid medicine of barrel through the gap of pintle and joint.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a syringe configuration provided in accordance with an embodiment of the present application;

FIG. 2 is a schematic diagram of the internal components of the injector provided in the embodiments of the present application;

FIG. 3 is a schematic structural view of the upper end face of the syringe provided by the embodiment of the present application;

FIG. 4 is a schematic view of a connection structure of the pintle and the connector according to an embodiment of the present disclosure;

fig. 5 is a second schematic view of a connection structure of the pintle and the connector according to the embodiment of the present application.

In the figure: 100-needle cylinder; 110-a cylinder; 111-a handle member; 112-scale bar; 120-a linker; 121-a chuck; 122-a needle guard; 200-a piston member; 210-a piston rod; 211-piston shank; 220-a piston; 221-a plug; 300-a needle head; 310-pintle; 311-jaws; 312-a card strip; 313-card slot; 320-needle stalk; 330-the needle tip.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection 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.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-5, the present application provides a disposable injection needle that prevents reuse, including a barrel 100, a piston member 200, and a needle 300.

In a specific arrangement, the combination of the cylinder 100 and the piston member 200 is used to suck a medical fluid to be injected, and the needle 300 is used to assist in sucking the medical fluid and injecting the medical fluid into a subject when necessary.

Referring to fig. 1-5, the syringe 100 includes a barrel 110 and a connector 120, the barrel 110 and the connector 120 are integrally formed, the barrel 110 is communicated with the connector 120, one side of the barrel 110 is provided with two handle members 111, the handle members 111 are symmetrically arranged, the side wall of the handle member 111 is provided with anti-slip lines, the side wall of the barrel 110 is provided with a scale lath 112, the scale lines of the scale lath 112 are flush with the side line of the side wall of the piston 220, the end of the connector 120 is clamped with a needle sheath 122, the needle sheath 122 is sleeved outside the needle stem 320 and the needle tip 330, the end of the needle sheath 122 is provided with a through hole structure, and the through hole at the end of the needle sheath 122 is matched with the needle tip 330.

When the syringe 100 component is specifically arranged, the syringe 100 component is composed of the barrel 110 and the connector 120, the barrel 110 is used for storing liquid medicine, the liquid medicine is conveniently sucked and injected into a target body, the connector 120 is used for being matched with and installing the needle head 300 component, the position stability of the needle head 300 component is maintained, the injection work on the target is conveniently carried out, the handle part 111 is additionally arranged on the side wall of the barrel 110, the handle part 111 is used for playing a supporting role during the injection, the barrel 110 is conveniently and stably held, the injection work can be carried out more stably, the scale lath 112 arranged on the side wall of the barrel 110 is used for observing the liquid medicine capacity sucked currently, the precision of the liquid medicine injected to a patient is improved, the needle sleeve 122 is arranged at the end part of the connector 120 and is used for protecting the needle head 300 component, the use of the needle head 300 component is prevented from being influenced by force deformation, and meanwhile, the needle tip 330 of the needle head 300 can be prevented from accidentally stabbing a user.

Referring to fig. 2, the piston member 200 includes a piston rod 210 and a piston 220, the piston 220 is movably inserted into the inner wall of the cylinder 110, the piston rod 210 is installed at one end of the piston 220, the end of the piston 220 is located at one side of the joint 120, the piston rod 210 is located at the inner side of the cylinder 110, the end of the piston 220 is provided with an arc-shaped edge structure matched with the end of the joint 120, one end of the piston rod 210 is installed with a piston handle 211, the piston handle 211 is located at the outer side of the cylinder 110, and the outer diameter of the piston handle 211 is larger than the outer diameter of the middle through hole of the cylinder 110.

When specifically setting up, piston 220 is the rubber material for cooperation shutoff syringe 100 maintains the inside closure of syringe 100 part, conveniently absorbs the liquid medicine, avoids the liquid medicine to reveal, and piston rod 210 tip is linked with piston 220, can promote piston 220 and move in syringe 100 is inside, maintains the stability of absorbing the liquid medicine process, piston rod 210 tip installation piston handle 211, piston handle 211 is used for supplementary propulsion piston rod 210, improves lifting surface, the pressure of dispersion promotion piston rod 210 to the hand.

Referring to fig. 2 and 4, the needle 300 includes a needle bar 310, a needle stem 320 and a needle tip 330, the needle tip 330 is integrally formed at an end of the needle stem 320, one end of the needle stem 320 is fixedly installed at the middle of the needle bar 310, the needle bar 310 is fixedly installed at an inner wall of the connector 120, the needle bar 310 is hermetically installed at an inner side wall of the connector 120, and an end of the needle bar 310 does not protrude from the inner wall of the connector 120.

When specifically setting up, pintle 310 is used for fixed needle stalk 320, and pintle 310 is installed at the joint 120 inner wall simultaneously, can maintain the stability of the needle stalk 320 relative position of installing needle point 330, conveniently carry out injection work, install pintle 310 seal at the joint 120 inside wall, can avoid pintle 310 and joint 120 junction to reveal the liquid medicine, guarantee that the liquid medicine can stably inject into the target internal, also can avoid external environment to produce the influence to the inside liquid medicine of barrel 110 through the gap of pintle 310 and joint 120 junction.

Specifically, referring to fig. 4, a clamping head 121 is disposed on an inner side wall of the connector 120, a bayonet structure matched with the clamping head 121 is disposed on an outer side wall of the pintle 310, and an end portion of the clamping head 121 is clamped in the bayonet of the side wall of the pintle 310.

When specifically setting up, increase dop 121 at the joint 120 inner wall, with pintle 310 seal installation at the joint 120 inner wall, dop 121 can carry out spacingly to pintle 310, maintains the stability of pintle 310 position, prevents that syringe needle 300 part is not hard up when the injection, guarantees that the injection can go on safely.

Specifically, referring to fig. 2 and 4, the inner sidewall of the pintle 310 is provided with a claw 311, one side of the claw 311 is an inclined surface structure, the inclined surface of the side wall of the claw 311 extends to the end portion of the inner sidewall of the pintle 310, the end portion of the piston 220 is provided with a plug 221, the end portion of the plug 221 is an arc surface structure, the plug 221 is located at one side of the joint 120, and the outer diameter of the plug 221 is slightly larger than the inner diameter of the pintle 310.

When the injection is completely pushed to the bottom of the inner side of the barrel 110, the plug 221 corresponds to the claw 311 on the inner side wall of the pintle 310, the plug 221 can be completely clamped on the inner side of the claw 311, the inclined plane at the front end of the claw 311 is used for guiding the plug 221 to enter, the curved surface at the rear end of the claw 311 is used for clamping the plug 221, the plug 221 is prevented from being loosened, the needle head 300 is blocked, and the secondary use of the injector is prevented.

Specifically, referring to fig. 5, the outer side wall of the pintle 310 is provided with a clamping strip 312, the inner side wall of the connector 120 is provided with a clamping groove 313 matched with the clamping strip 312, and the end of the clamping strip 312 is tightly inserted into the middle of the clamping groove 313.

In the specific arrangement, a structure of the clamping strip 312 is added on the outer side wall of the pintle 310, and a clamping groove 313 matched with the clamping strip 312 is correspondingly added on the inner side wall of the connector 120, so that when the pintle 310 is installed, the pintle 310 is conveniently installed on the inner side of the connector 120 under the guidance of the clamping strip 312 on the side wall and the clamping groove 313 on the inner wall of the connector 120, and the pintle 310 can be limited, so that the pintle 310 is prevented from laterally rotating when in use, and the position stability of the pintle 310 is maintained.

The working principle of the disposable injection needle is as follows: the combination of the cylinder 100 and the piston member 200 serves to suck a medical fluid to be injected, and the needle 300 serves to assist in sucking the medical fluid and injecting the medical fluid into a subject when necessary. Syringe 100 part by barrel 110 and joint 120 constitution, barrel 110 is used for storing the liquid medicine, conveniently absorb the liquid medicine and pour into the target internal with the liquid medicine, joint 120 is used for cooperating the installation syringe needle 300 part, maintain the stability of syringe needle 300 part position, conveniently inject the work to the target, increase handle 111 at barrel 110 lateral wall, handle 111 is used for playing the effect of support when injecting, conveniently hold steady barrel 110, can be more stable carry out the injection operation, scale lath 112 that barrel 110 lateral wall set up is used for observing the liquid medicine capacity of current absorption, improve the precision to patient's injection liquid medicine, install needle cover 122 at the joint 120 tip, needle cover 122 is used for protecting syringe needle 300 part, avoid syringe needle 300 part atress to warp the use, can prevent that the needle point 330 of syringe needle 300 from puncturing the user by accident simultaneously. Piston 220 is the rubber material for cooperation shutoff cylinder 100 maintains the inside leakproofness of cylinder 100 part, conveniently absorbs the liquid medicine, avoids the liquid medicine to reveal, and piston rod 210 tip and piston 220 are linked, can promote piston 220 and move in cylinder 100 is inside, maintains the stability of absorbing the liquid medicine process, and piston rod 210 tip installation piston handle 211, piston handle 211 are used for supplementary propulsion piston rod 210, improve the lifting surface area, and the dispersion promotes piston rod 210 to the pressure of hand. The pintle 310 is used for fixing the needle stem 320, and the pintle 310 is installed at the inner wall of the joint 120, so that the stability of the relative position of the needle stem 320 with the needle point 330 can be maintained, the injection work is convenient, the pintle 310 is hermetically installed on the inner side wall of the joint 120, the liquid medicine leakage at the joint of the pintle 310 and the joint 120 can be avoided, the liquid medicine can be stably injected into a target body, and the influence of the external environment on the liquid medicine inside the barrel 110 through the gap between the pintle 310 and the joint 120 can be avoided. Increase dop 121 at the joint 120 inner wall, with pintle 310 seal installation at the joint 120 inner wall, dop 121 can carry out spacing to pintle 310, maintains the stability of pintle 310 position, prevents that syringe needle 300 part is not hard up when the injection, guarantees that the injection can go on safely. The inner side wall of the pintle 310 is additionally provided with the clamping jaw 311, the clamping jaw 311 is used for clamping a structure arranged at the end part of the piston 220, when the injection is completely pushed to the bottom of the inner side of the barrel 110, the clamping jaw 311 can completely clamp an object at the end part of the piston 220, further, the needle stem 320 is blocked, the secondary use of the injection needle is avoided, the end part of the piston 220 is additionally provided with the plug 221, the plug 221 corresponds to the clamping jaw 311 on the inner side wall of the pintle 310, when the injection is completely pushed to the bottom of the inner side of the barrel 110, the plug 221 can be completely clamped inside the clamping jaw 311, the inclined plane at the front end of the clamping jaw 311 is used for guiding the plug 221 to enter, the curved surface at the rear end of the clamping jaw 311 is used for clamping the plug 221, the plug 221 is prevented from being loosened, the needle head 300 is blocked, and the syringe is prevented from being used for the second time. The structure of the clamping strip 312 is added on the outer side wall of the pintle 310, the clamping groove 313 matched with the clamping strip 312 is correspondingly added on the inner side wall of the connector 120, when the pintle 310 is installed, the pintle 310 is conveniently installed on the inner side of the connector 120 under the guidance of the clamping strip 312 on the side wall and the clamping groove 313 on the inner wall of the connector 120, the pintle 310 can be limited, the pintle 310 is prevented from laterally rotating when in use, and the position stability of the pintle 310 is maintained.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope 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.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A disposable injection needle capable of avoiding repeated use is characterized by comprising

The needle cylinder (100), the needle cylinder (100) comprises a cylinder body (110) and a joint (120), the cylinder body (110) and the joint (120) are of an integrally formed structure, and the cylinder body (110) is communicated with the joint (120) inside;

the piston piece (200), the piston piece (200) includes a piston rod (210) and a piston (220), the piston (220) is movably inserted into the inner wall of the cylinder (110), the piston rod (210) is installed at one end of the piston (220), the end of the piston (220) is located at one side of the joint (120), the piston rod (210) is located at the inner side of the cylinder (110), and the end of the piston (220) is provided with an arc-shaped edge structure matched with the end of the joint (120);

needle (300), needle (300) include pintle (310), needle stalk (320) and needle point (330), needle point (330) integrated into one piece is in needle stalk (320) tip, needle stalk (320) one end fixed mounting be in the middle of pintle (310), pintle (310) fixed mounting be in connect (120) inner wall.

2. A disposable injection needle capable of avoiding repeated use as claimed in claim 1, wherein a chuck (121) is formed on the inner side wall of said joint (120), a bayonet structure matched with said chuck (121) is formed on the outer side wall of said pintle (310), and the end of said chuck (121) is clamped in the bayonet on the side wall of said pintle (310).

3. A disposable injection needle capable of avoiding repeated use as claimed in claim 1, wherein a claw (311) is formed on the inner side wall of the pintle (310), one side of the claw (311) is of an inclined surface structure, and the inclined surface of the side wall of the claw (311) extends to the end part of the inner side wall of the pintle (310).

4. A disposable injection needle avoiding reuse according to claim 3, characterized in that the end of the piston (220) is opened with a plug (221), the end of the plug (221) is a cambered surface structure, the plug (221) is located at the side of the joint (120), and the outer diameter of the plug (221) is slightly larger than the inner diameter of the pintle (310).

5. A disposable injection needle capable of avoiding repeated use as claimed in claim 1, wherein the outer side wall of the pintle (310) is provided with a clamping strip (312), the inner side wall of the joint (120) is provided with a clamping groove (313) matched with the clamping strip (312), and the end part of the clamping strip (312) is tightly inserted in the middle of the clamping groove (313).

6. A disposable injection needle capable of avoiding repeated use as claimed in claim 1, wherein a handle member (111) is provided at one side of the barrel (110), the handle members (111) are symmetrically provided, and the side wall of the handle member (111) is provided with anti-slip texture.

7. A disposable injection needle avoiding reuse according to claim 1, characterized in that a piston handle (211) is installed at one end of said piston rod (210), said piston handle (211) is located outside said cylinder (110), and the outer diameter of said piston handle (211) is larger than the outer diameter of the middle through hole of said cylinder (110).

8. A disposable injection needle avoiding repeated use according to claim 1, characterized in that the side wall of the barrel (110) is provided with a scale strip (112), and the scale line of the scale strip (112) is flush with the side wall borderline of the piston (220).

9. A disposable injection needle without repeated use according to claim 1, wherein the end of the joint (120) is connected with a needle sheath (122) in a clamping manner, the needle sheath (122) is connected with the outside of the needle stem (320) and the needle point (330) in a sleeving manner, the end of the needle sheath (122) is provided with a through hole structure, and the through hole at the end of the needle sheath (122) is matched with the needle point (330).

10. A disposable injection needle avoiding reuse according to claim 1, characterized in that said pintle (310) is sealingly mounted on the inside wall of said hub (120) and the end of said pintle (310) does not protrude from the inside wall of said hub (120).

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