CN220309526U - Injector for preventing needle puncture - Google Patents

Abstract

The utility model relates to the field of syringes, in particular to a syringe capable of preventing needle puncture, which comprises a syringe tube body, wherein an anti-rolling block is integrally arranged on the outer wall of the syringe tube body, a clamping assembly is fixedly connected to the outer wall of the anti-rolling block, a protective tube is fixedly connected to one side of the clamping assembly, a pluggable needle is connected to the bottom of the syringe tube body in a clamping manner, a needle protection sleeve assembly is tightly attached to the outer wall of the pluggable needle, a syringe handle is integrally arranged on the top of the syringe tube body, and a syringe piston is connected to the inside of the syringe tube body in a sliding manner; according to the utility model, the needle head protective sleeve assembly is arranged, so that the whole needle head is protected, the needle head is prevented from being bent and stabbed by accident, the needle head is sealed and protected through the protective tube, and the needle head is better protected while the accidental stabbed is further avoided.

Description

Injector for preventing needle puncture

Technical Field

The utility model relates to the field of syringes, in particular to a syringe capable of preventing needle puncture.

Background

The advent of syringes is an epoch-making revolution in the medical device field. This process of drawing, injecting a gas or liquid with a needle is called injection. The injector consists of a needle cylinder with a small hole at the front end and a piston core rod matched with the needle cylinder, and is used for injecting a small amount of liquid or extracting the liquid from an area which cannot be accessed by other methods, and the needle head is sharp, so that the damage actions such as false puncture and the like are often caused by the problems of improper taking mode and the like during use.

In chinese patent CN201080025669.6, the present utility model relates to a syringe adapter mountable to a syringe, in particular a retractable syringe with a retractable needle, comprising a sealing member and an adapter body comprising two or more body members which cooperate to retain the sealing member in the adapter. One or other of the body members may be removably mountable to the barrel of the syringe, the one or other body member including a mounting member. The filter member may be detachably mounted to the mounting member or integrally formed with the mounting member to filter liquid when filling the syringe, thereby removing particular substances, impurities, and the like. Alternatively, a filter material may be provided in the syringe adapter. Additionally or alternatively, a filling needle is provided that is removably mountable to the syringe adapter and that prevents the retractable needle from bending or thorn.

The existing injector may cause problems of hurting people due to improper use or taking because the needle is sharp and is not protected during use, and may cause bacterial dust contamination because the needle part is not effectively isolated and protected.

Accordingly, a syringe that is resistant to needle stick injuries has been proposed in view of the above-mentioned problems.

Disclosure of Invention

In order to make up for the defects of the prior art, the utility model provides the syringe capable of preventing the needle from being punctured, so that the syringe has better effect of preventing the accidental puncture, and the problems that the prior syringe is possibly used or improperly taken to be punctured due to sharp needle heads and non-protection reasons and bacterial dust contamination is possibly caused by the fact that the needle head part is not effectively isolated and protected are solved.

The utility model relates to an injector for preventing needle puncture, which comprises an injector tube body, wherein an anti-rolling block is integrally arranged on the outer wall of the injector tube body, a clamping assembly is fixedly connected to the outer wall of the anti-rolling block, a protective tube is fixedly connected to one side of the clamping assembly, a pluggable needle is connected to the bottom of the injector tube body in a clamping manner, the outer wall of the pluggable needle is tightly attached to a needle protective sleeve assembly, an injector tube handle is integrally arranged on the top of the injector tube body, an injector tube piston is slidingly connected to the inside of the injector tube body, a positioning clamping piece is fixedly connected to the top of the injector tube piston, a piston shaft is fixedly connected to the inside of the positioning clamping piece, a sealing cover is integrally arranged on the top of the piston shaft, an injection pushing piece is fixedly connected to the top of the sealing cover, a pushing piece protecting shell is fixedly connected to the outer wall of the injection pushing piece, and a pushing piece protruding point is integrally arranged on the outer wall of the pushing piece protecting shell

Preferably, the block assembly comprises a block, a block card button, a button reset spring, a block access block and an access block clamping groove, wherein the block card button is connected to the block card button in a clamping manner, the button reset spring is tightly attached to one side of the block card button, the block access block is tightly attached to one side of the block card button, and the access block clamping groove is formed in the block access block.

Preferably, the needle protection sleeve assembly comprises a first sleeve, a first sleeve clamping external thread, a second sleeve, a third sleeve, a fourth sleeve, a fifth sleeve, a sixth sleeve, a seventh sleeve, a sleeve clamping block, a sleeve clamping groove and a sleeve clamping internal thread, wherein the first sleeve is provided with the first sleeve clamping external thread at the top, the second sleeve is connected with the first sleeve through the outer wall clamping, the third sleeve is connected with the fourth sleeve through the outer wall clamping, the fourth sleeve is connected with the fifth sleeve through the outer wall clamping, the sixth sleeve is connected with the seventh sleeve through the outer wall clamping, the inner top of the seventh sleeve is provided with the sleeve clamping internal thread, the fifth sleeve is provided with the sleeve clamping block through the outer integration, and the fifth sleeve is provided with the sleeve clamping groove through the inner portion.

Preferably, the clamping card button and the clamping centralizing block form an elastic structure through a button reset spring, and the clamping centralizing block and the clamping accessing block form a clamping structure through the clamping card button and the accessing block clamping groove.

Preferably, the protection tube and the syringe tube body form a detachable structure through the clamping assembly, and the clamping assembly is symmetrically provided with a pair of the clamping assemblies relative to the longitudinal central axis of the syringe tube body.

Preferably, the second sleeve forms a sliding structure with the first sleeve through the sleeve clamping block and the sleeve clamping groove, the first sleeve forms a communicating structure with the seventh sleeve through the second sleeve, the third sleeve, the fourth sleeve, the fifth sleeve, the sixth sleeve and the seventh sleeve, and the seventh sleeve forms a thread detachable structure with the first sleeve through the external thread and the internal thread of the sleeve clamping.

Preferably, the piston shaft and the syringe tube form a sliding structure through the syringe piston, and the outer diameter of the syringe piston is consistent with the inner diameter of the syringe tube.

Preferably, the anti-slip protruding points of the push plate are arranged at equal intervals relative to the outer wall of the push plate protecting shell, and the push plate protecting shell is made of silica gel.

The utility model has the advantages that:

1. the protective tube is arranged to seal and protect the pluggable needle, so that pollutants such as germ dust are prevented from contacting the pluggable needle, the damage of bending and the like caused by collision of the needle is avoided, and meanwhile, the situation that the pluggable needle punctures other people due to improper operation and the like is avoided, and unnecessary damage is caused;

2. according to the utility model, the needle head protection sleeve assembly is arranged to further protect the pluggable needle head, so that the pluggable needle head is prevented from being bent and stabbed to other people, meanwhile, the retractable structure also greatly reduces the convenience in use, and the sleeve seven is retracted and the sleeve clamping external thread and the sleeve clamping internal thread form threaded connection, so that the needle head protection sleeve assembly is fixed, and the pluggable needle head protection sleeve assembly is convenient to use and retract at any time and can be protected again when not used;

3. according to the utility model, the push piece protective shell is arranged, so that the pain caused to the finger during repeated injection is reduced by using the push piece protective shell made of the silica gel outside the injection push piece, the injection push piece is more attached to the finger through the circular arc-shaped arrangement, the contact surface is uniformly stressed, the damage to the finger is further reduced, and the anti-slip effect is enhanced by matching the anti-slip protruding point of the push piece with the circular arc-shaped arrangement of the injection push piece, so that the problem of easy slipping caused by sweating and the like is avoided.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall front perspective structure of the present utility model;

FIG. 2 is a schematic diagram of the overall side view and three-dimensional structure of the present utility model;

FIG. 3 is a schematic perspective view of the present utility model in a top view;

FIG. 4 is a schematic perspective view of the whole section of the present utility model;

FIG. 5 is a partially exploded perspective view of the needle shield sleeve assembly of the present utility model;

fig. 6 is an enlarged perspective view of the structure a in fig. 3.

In the figure: 1. a syringe body; 2. anti-rolling blocks; 3. a clamping assembly; 301. a clamping centralizing block; 302. a card button is clamped; 303. a button return spring; 304. clamping the access block; 305. an access block clamping groove; 4. a protective tube; 5. a needle head can be pulled out; 6. a needle shield sleeve assembly; 601. a sleeve I; 602. the sleeve is clamped with the external thread; 603. a second sleeve; 604. a sleeve III; 605. a sleeve IV; 606. a sleeve V; 607. a sleeve six; 608. a sleeve seven; 609. a sleeve clamping block; 610. a sleeve clamping groove; 611. the sleeve is clamped with the internal thread; 7. a syringe stem; 8. a syringe piston; 9. positioning the clamping piece; 10. a piston shaft; 11. sealing cover; 12. injecting a pushing piece; 13. a pushing piece protecting shell; 14. the pushing piece is provided with an anti-slip protruding point.

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.

Example 1

Referring to fig. 1 to 6, an injector for preventing needle stick injury includes an injector tube body 1, an anti-rolling block 2 is integrally provided on an outer wall of the injector tube body 1, and an outer wall of the anti-rolling block 2 is fixedly connected with a clamping assembly 3, and one side of the clamping assembly 3 is fixedly connected with a protecting tube 4, a bottom clamping of the injector tube body 1 is connected with a pluggable needle 5, and an outer wall of the pluggable needle 5 is tightly attached with a needle protecting sleeve assembly 6, a syringe handle 7 is integrally provided on a top of the injector tube body 1, an injector piston 8 is slidably connected inside the injector tube body 1, a positioning clamping piece 9 is fixedly connected with a piston shaft 10 on a top of the injector piston 8, a sealing cover 11 is integrally provided on a top of the sealing cover 11, an injection pushing piece 12 is fixedly connected on a top of the sealing cover 11, a pushing piece protecting shell 13 is fixedly connected with an outer wall of the injection pushing piece 12, and an anti-skid protruding point 14 is integrally provided on an outer wall of the pushing piece protecting shell 13.

Referring to fig. 1 to 4, a piston shaft 10 forms a sliding structure with a syringe tube 1 through a syringe piston 8, and the outer diameter of the syringe piston 8 is consistent with the inner diameter of the syringe tube 1; after the extractable needle 5 is exposed, the extractable needle 5 is placed in the liquid to be extracted, the syringe tube 1 is held, the injection pushing piece 12 is extracted outwards, the syringe piston 8, the positioning clamping piece 9, the piston shaft 10 and the sealing cover 11 in the syringe tube 1 are driven to integrally and outwards pump the liquid into the syringe tube 1, if the operation is needed to be suspended in the injection process, the extractable needle 5 can be covered again by the needle protection sleeve assembly 6, the syringe tube 1 is placed at a proper position, rolling blocks 2 on two sides of the syringe tube 1 can prevent the whole syringe from rolling and falling due to inclined planes and the like, the positioning clamping piece 9 can prevent the piston shaft 10 from shaking in the syringe tube 1 in the injection pushing process, and the sealing cover 11 and the top of the syringe tube 1 form sealing after the syringe tube 1 is not used or is used, so that dust and the like can be prevented from falling into gaps between the syringe tube 1 and the positioning clamping piece 9.

Referring to fig. 1 to fig. 4 and fig. 6, the push-piece anti-slip protruding points 14 are arranged at equal intervals with respect to the outer wall of the push-piece protecting shell 13, and the push-piece protecting shell 13 is made of silica gel; the outside ejector pad shell 13 of injection ejector pad 12 uses the silica gel material, avoids bringing certain painful sense for the finger because the ejector pad 12 material is harder when repeatedly injecting, and the ejector pad 12 uses the arc setting simultaneously, uses laminating finger and anti-skidding effect with ejector pad anti-skidding salient point 14 on ejector pad shell 13 surface together.

Example two

Referring to fig. 1 to 5, a syringe capable of preventing needle stick injury is disclosed, the locking assembly 3 includes a locking concentrated block 301, a locking card button 302, a button return spring 303, a locking access block 304, a locking block locking groove 305, wherein the locking concentrated block 301 is connected with the locking card button 302 in an inner locking manner, one side of the locking card button 302 is tightly attached with the button return spring 303, one side of the locking concentrated block 301 is tightly attached with the locking access block 304, the locking access block 304 is internally provided with the locking block locking groove 305, the needle protection sleeve assembly 6 includes a first sleeve 601, a sleeve locking external thread 602, a second sleeve 603, a third sleeve 604, a fourth sleeve 605, a fifth sleeve 606, a sixth sleeve 607, a seventh sleeve 608, a sleeve locking block 609, a sleeve locking groove 610 and a sleeve locking internal thread 611, the top of the first sleeve 601 is provided with the sleeve locking external thread 602, the outer wall of the first sleeve 601 is connected with the second sleeve 303, the outer wall of the third sleeve 604 is connected with the sleeve 604, the fourth sleeve 607 is connected with the fourth sleeve 605, the fifth sleeve 606 is provided with the fifth sleeve 608, the fifth sleeve 606 is provided with the inner sleeve 606, and the seventh sleeve 608 is provided with the fifth sleeve 608.

Referring to fig. 1 to 4, the snap card button 302 and the snap focusing block 301 form an elastic structure through a button return spring 303, and the snap focusing block 301 and the snap access block 304 form a snap structure through the snap card button 302 and the access block snap groove 305; the clamping card buttons 302 on the two sides of the syringe body 1 are pressed, so that the clamping card buttons 302 press the button return springs 303 inwards, and the clamping card buttons 302 and the connecting block clamping grooves 305 are out of clamping connection, so that the syringe body 1 and the protection tube 4 are out of clamping connection.

Referring to fig. 1 to 4, the protective tube 4 and the syringe tube 1 form a detachable structure through the fastening assembly 3, and the fastening assembly 3 is symmetrically arranged with a pair about the longitudinal central axis of the syringe tube 1; the clamping card button 302 is pressed, the button return spring 303 is pressed by the clamping card button 302, the clamping card button 302 is further displaced to align with the access block clamping groove 305 on the clamping access block 304, the clamping centralizing block 301 and the clamping access block 304 are restored to be in clamping connection, and the injector tube body 1 and the protection tube 4 are restored to be in clamping connection and the inside is sealed.

Referring to fig. 4 to 5, a sliding structure is formed by a second sleeve 603 and a first sleeve 601 through a second sleeve locking block 609 and a first sleeve locking groove 610, a communicating structure is formed by a first sleeve 601, a third sleeve 603, a fourth sleeve 605, a fifth sleeve 606, a sixth sleeve 607 and a seventh sleeve 608, and a detachable structure is formed by a seventh sleeve 608 and a first sleeve 601 through a first sleeve locking external thread 602 and a first sleeve locking internal thread 611; the first sleeve 601, the second sleeve 603, the third sleeve 604, the fourth sleeve 605, the fifth sleeve 606, the sixth sleeve 607 and the seventh sleeve 608 of the needle protection sleeve assembly 6 have certain friction force, so that the puncture preventing effect cannot be achieved due to excessive loosening, the first sleeve 601, the second sleeve 603, the third sleeve 604, the fourth sleeve 605, the fifth sleeve 606, the sixth sleeve 607 and the seventh sleeve 608 are clamped with the sleeve clamping groove 610 through the sleeve clamping block 609 and are prevented from being separated from each other due to sliding effect, when the extractable needle 5 is needed, the seventh sleeve 608 is moved upwards, after the sleeve clamping block 609 outside the sixth sleeve 607 is moved to be clamped in the sleeve clamping groove 610 in the seventh sleeve 608, the seventh sleeve 608 drives the sixth sleeve 607 to move upwards until the sleeve clamping block outside the fifth sleeve 606 is clamped in the sleeve clamping groove 610, the seventh sleeve 608 drives the sixth sleeve 608 and the fifth sleeve 606, the third sleeve 605 and the fourth sleeve 605 are sequentially driven upwards until the sleeve clamping threads 601 at the top of the seventh sleeve 608 are in contact with the first sleeve 608 and the seventh sleeve 608, the seventh sleeve 608 is contacted with the seventh sleeve 602, the seventh sleeve 608 is prevented from being screwed down, and the first sleeve 602 is screwed down, the seventh sleeve 608 is prevented from being screwed down, and the second sleeve 602 is screwed down, and the seventh threads are prevented from being screwed down.

Working principle: firstly, when the injector is needed to be used, the injector is taken out, the clamping card buttons 302 at two sides of the injector tube body 1 are pressed, the clamping card buttons 302 press the button reset springs 303 inwards, the clamping card buttons 302 are in clamping connection with the clamping grooves 305 of the access block, so that the injector tube body 1 is in clamping connection with the shielding tube 4, the internal pluggable needle 5 is exposed to expose the needle shielding sleeve assembly 6, a certain friction force is provided between the inner sleeve 601, the sleeve 603, the sleeve 604, the sleeve 605, the sleeve 606, the sleeve 607 and the sleeve 608 of the needle shielding sleeve assembly 6, the effect of preventing puncture injury is avoided, the inner sleeve 601, the sleeve 603, the sleeve 604, the sleeve 605, the sleeve 606, the sleeve 607 and the sleeve 608 form clamping and sliding effects through the sleeve clamping blocks 609 and the sleeve clamping grooves 610, and the mutual separation connection is avoided, when the removable needle 5 is required to be used, the sleeve seven 608 is moved upwards, after the sleeve clamping block 609 outside the sleeve six 607 is moved to be clamped in the sleeve clamping groove 610 in the sleeve seven 608, the sleeve seven 608 drives the sleeve six 607 to move upwards, then the sleeve clamping block 609 outside the sleeve five 606 is moved upwards in the sleeve clamping groove 610 in the sleeve six 607 until being clamped, the sleeve seven 608 drives the sleeve six 607 and the sleeve five 606, and the sleeve two 603, the sleeve three 604 and the sleeve four 605 are sequentially driven upwards until the sleeve clamping internal thread 611 at the top of the sleeve seven 608 is contacted with the sleeve clamping external thread 602 at the top of the sleeve one 601, the sleeve seven 608 is rotated, so that the sleeve clamping internal thread is connected with the sleeve clamping external thread 602 in a threaded manner, and then the sleeve one 601, the sleeve two 603, the sleeve three 604, the sleeve four 605, the sleeve five 606 and the sleeve six 607 are fixed, the seventh sleeve 608 is positioned to avoid falling down to cover the extractable needle 5 during operations such as injection;

secondly, after the pluggable needle 5 is exposed, the pluggable needle 5 is placed in the liquid to be extracted, the syringe tube 1 is held, the injection pushing piece 12 is extracted outwards, the syringe piston 8, the positioning clamping piece 9, the piston shaft 10 and the sealing cover 11 are driven to integrally outwards in the syringe tube 1, liquid is pumped into the syringe tube 1, if the operation needs to be suspended in the injection process, the needle protection sleeve assembly 6 can be covered again by the pluggable needle 5, the syringe tube 1 is placed at a proper position, the rolling prevention blocks 2 on two sides of the syringe tube 1 can prevent the whole syringe from rolling down due to inclined planes and the like, the positioning clamping piece 9 can prevent the piston shaft 10 from shaking in the syringe tube 1, the sealing cover 11 and the top of the syringe tube 1 form sealing after the syringe pushing piece 1 is not used or is used, dust and the like are prevented from falling into gaps between the syringe tube 1 and the positioning clamping piece 9, meanwhile, the outer pushing piece 13 of the syringe pushing piece is made of silica gel material, the syringe pushing piece 12 is prevented from being hard enough to cover the pluggable needle 5 in the injection process, the rolling prevention block 2 on two sides of the syringe tube 1 can prevent the whole syringe from rolling down due to inclined planes and the like, the fact that the rolling down is caused by the inclined planes and the like, the rolling prevention block 2 is used for connecting with the anti-slip clamping piece 302, the anti-slip clamping piece 302 is aligned with the arc-shaped protection piece 302, and the anti-slip clamping piece 302 is connected with the inner side of the syringe tube 1, and the anti-slip protection piece 302 is aligned with the arc-shaped protection piece 302, and the anti-slip protection piece is connected with the anti-slip device, and the anti-slip device 302, and the anti-slip device is connected with the anti-slip device, and the anti-slip device is connected.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims (8)

1. An anti-needle stick syringe, characterized in that: including syringe body (1), the outer wall integration of syringe body (1) is provided with prevents rolling piece (2), and the outer wall fixedly connected with block subassembly (3) of rolling piece (2) to one side fixedly connected with protection tube (4) of block subassembly (3), the bottom block of syringe body (1) is connected with pluggable needle (5), and the outer wall of pluggable needle (5) closely laminates there is syringe needle protection sleeve subassembly (6), the top integration of syringe body (1) is provided with syringe handle (7), and the inside sliding connection of syringe body (1) has syringe piston (8), the top fixedly connected with location block piece (9) of syringe piston (8), and the inside fixedly connected with piston shaft (10) of location block piece (9), the top integration of piston shaft (10) is provided with sealed lid (11), and the top fixedly connected with injection pushing plate (12), the outer wall of injection pushing plate (12) is connected with glued and is protected the outer wall of pushing plate (13), and the outer wall of pushing plate (14) is protected and is glued and is protected the piece (13).

2. A needlestick injury prevention syringe as claimed in claim 1, and wherein: the clamping assembly (3) comprises a clamping concentrated block (301), a clamping card button (302), a button reset spring (303), a clamping access block (304) and an access block clamping groove (305), wherein the clamping concentrated block (301) is internally clamped and connected with the clamping card button (302), one side of the clamping card button (302) is tightly attached with the button reset spring (303), one side of the clamping concentrated block (301) is tightly attached with the clamping access block (304), and the clamping access block (304) is internally provided with the access block clamping groove (305).

3. A needlestick injury prevention syringe as claimed in claim 1, and wherein: the needle protection sleeve assembly (6) comprises a sleeve I (601), a sleeve clamping external thread (602), a sleeve II (603), a sleeve III (604), a sleeve IV (605), a sleeve V (606), a sleeve V (607), a sleeve V (608), a sleeve clamping block (609), a sleeve clamping groove (610) and a sleeve clamping internal thread (611), wherein the sleeve clamping external thread (602) is arranged at the top of the sleeve I (601), the sleeve II (603) is connected with the outer wall clamping of the sleeve I (601), the sleeve III (604) is connected with the sleeve III (604), the sleeve IV (605) is connected with the sleeve V (606) by the outer wall clamping of the sleeve IV (605), the sleeve V (607) is connected with the sleeve V (608) by the outer wall clamping of the sleeve V (606), the sleeve V (608) is internally provided with the sleeve clamping internal thread (611) at the top of the sleeve I (608), the sleeve V (606) is integrally provided with the sleeve V (609), and the sleeve V (606) is internally provided with the sleeve V (610).

4. A needlestick injury prevention syringe as claimed in claim 2, and in which: the clamping card button (302) and the clamping concentrated block (301) form an elastic structure through a button return spring (303), and the clamping concentrated block (301) and the clamping access block (304) form a clamping structure through the clamping card button (302) and the access block clamping groove (305).

5. A needlestick injury prevention syringe as claimed in claim 1, and wherein: the protection tube (4) and the syringe tube body (1) form a detachable structure through the clamping assembly (3), and the clamping assembly (3) is symmetrically provided with a pair of longitudinal central axes of the syringe tube body (1).

6. A needlestick injury prevention syringe as claimed in claim 3, in which: the sleeve II (603) and the sleeve I (601) form a sliding structure through the sleeve clamping block (609), the sleeve clamping groove (610), the sleeve I (601) forms a communication structure through the sleeve II (603), the sleeve III (604), the sleeve IV (605), the sleeve V (606), the sleeve VI (607) and the sleeve V (608), and the sleeve V (608) forms a thread detachable structure through the sleeve clamping external threads (602), the sleeve clamping internal threads (611) and the sleeve I (601).

7. A needlestick injury prevention syringe as claimed in claim 1, and wherein: the piston shaft (10) and the syringe tube body (1) form a sliding structure through the syringe tube piston (8), and the outer diameter of the syringe tube piston (8) is consistent with the inner diameter of the syringe tube body (1).

8. A needlestick injury prevention syringe as claimed in claim 1, and wherein: the pushing piece anti-skid protruding points (14) are arranged at equal intervals relative to the outer wall of the pushing piece protecting shell (13), and the pushing piece protecting shell (13) is made of silica gel.