TWM444852U - Injector device - Google Patents

Description

syringe

This creation is a type of syringe, especially a composition of a fixed-dose syringe.

At present, for example, insulin injection, small needle beauty, etc., all use a syringe to extract a predetermined dose of the drug from the ampoule containing the injection drug, and then inject the drug into the human body through the needle at the tip of the syringe.

When the conventional syringe is used, the components are all in contact with the medicament, and based on the safety of the injection, after the syringe is used, all the components of the entire syringe need to be discarded, so the cost of the patient is high in the syringe. , resulting in a heavy burden of treatment, and the amount of waste used in the syringe after use. In addition, since the syringe draws a predetermined dose of the medicament from the ampule containing the injection agent, and then applies it to the human body, in the process, the syringe is used to take the medicine and the injection, and it is difficult to ensure the quality of the injection of the fixed dose, multiple times. In the case of an ampoule containing an injectable drug, there is a risk that the drug of the syringe will be contaminated.

The main purpose of this creation is to provide a syringe that would create a waste material problem that would abandon all components after use of the existing syringe.

In order to achieve the foregoing object, the syringe proposed by the present invention comprises: a combined syringe body comprising a receiving sleeve and an operating sleeve, the receiving sleeve and the operating sleeve being axially penetrated and hollow Body, the receiving sleeve includes a needle connecting end portion and a joint end portion is located Locating the axial ends of the sleeve, the operating sleeve comprises a set of connecting ends, the detachable set of the assembled end is connected to the engaging end of the accommodating sleeve; a medicament container is replaceable The medicine container comprises a hollow container body, a closed end cover and a piston fixed to an opening formed at one end of the container body, the piston is gas-filled The container is disposed in the opening formed at the other end of the container body in an axially movable manner, and the drug container has a closed end cap at one end of the container body at the needle connecting end of the receiving sleeve; an injection pusher, The utility model comprises a rod body and an operating member disposed at one end of the rod body, wherein the rod system is axially movable and mounted in the combined syringe body and can be connected to the piston of the medicament container, and the operating member is located in the operating sleeve of the combined syringe The outer connecting rod body; a needle comprising a set of connecting portions and a needle body having a pinhole therein, wherein the needle body is fixedly fixed in the socket portion, and the needle is sleeved and fixed to the combined syringe body by the sleeve portion thereof Needle connection The needle through the closure cap and extending into the inside of the drug container; and a cover, in groups based detachably sleeved on the needle and syringe body accommodating modular outer sleeve.

The composition of the syringe is constructed to have at least the following advantages:

1. High safety: The creation of the syringe is to inject a fixed dose of the medicament into the medicament container, so that the medicament in the container body is completely isolated from the human bacteria, and the risk of contamination can be directly eliminated, and the creation can make the medicament The injection agent for the container and its internal package is a standardized product, which ensures the quality of the injection of a fixed dose and achieves good use safety.

2. Easy to use: In the creation syringe, the accommodating sleeve and the operating sleeve of the combined syringe body are a combination structure of the easy-to-disassemble group, which makes it easy to assemble the drug container and replace the drug container. Furthermore, the creation syringe can be filled with a bullet-like drug filling mechanism, and the time required for the general syringe to be withdrawn from the ampule containing the injection agent can be saved during use, so the creation can be used for the patient to inject the medicament. Provide a good and easy to use helper.

3. Compliance with environmental protection: In the creation syringe, the needle and the drug container are replaceable disposable components to ensure the safety of the injection drug, and the other combined syringe body, injection pusher and cover are It can be used repeatedly and repeatedly. Compared with the existing syringe products that are used once, that is, the whole group of discarded syringes, the use of the creation syringe can reduce the unnecessary waste of materials, and the user only needs to purchase the medicament container and the needle with the fixed-dose injection medicament. That can be combined with the combined syringe body and the injection push rod, so that the material can be saved and the use cost can be reduced.

The secondary purpose of the present invention is to further attach a sliding sleeve between the rod and the operating member of the injection rod of the syringe, and form a guiding groove including a straight groove portion and a chute portion by using the outer peripheral surface of the sliding sleeve. The guiding protrusion of the inner wall of the operating sleeve of the combined syringe body extends into the guiding groove, so that the injection push rod can push the piston of the medicament container in the body of the combined syringe in an axial straight forward manner, wherein the straight groove portion is used The length controls the injection volume, and the inaccuracy of the injection administration mode controlled by the human factor is excluded from the application; the injection pusher can be moved in the opposite direction in a spiral manner, and the injection pusher is pulled backwards from the body of the combined syringe. It has a labor-saving operation convenience.

Another purpose of this creation is to make the body of the combined syringe The sleeve and the operating sleeve are members of the snap-fit combination, and the pressing elastic piece provides a simple pressing manner for the user to cancel the locking state between the receiving sleeve and the operating sleeve, so that the combined syringe body can easily disassemble the medicament. container.

As shown in FIG. 1, a preferred embodiment of the present invention is disclosed. The syringe comprises a combined syringe body 1, a medicament container 2, an injection pusher 3, a needle 4 and a cover 5. As shown in FIG. 1 and FIG. 2, the combined syringe body 1 includes a receiving sleeve 11 and an operating sleeve 12, and the receiving sleeve 11 is a hollow body that is axially penetrated inside. The accommodating sleeve 11 includes a needle connecting end portion 111 and an engaging end portion 112. The needle assembling end portion 111 and the engaging end portion 112 are respectively located at two axial ends of the accommodating sleeve 11. The operation sleeve 12 is a hollow body that is axially penetrated inside. The operation sleeve 12 includes a plurality of end portions 120, and the assembly end portion 120 is detachably assembled to the accommodating sleeve 11 The engaging end portion 112, by the combination of the receiving sleeve 11 and the operating sleeve 12, provides for placement of the medicament container 2 therein.

As shown in FIG. 1, FIG. 2 and FIG. 4, in the preferred embodiment, the engaging end portion 112 of the accommodating sleeve 11 is formed with an annular flange 113 and a plurality of side ends of the annular flange 113 are spaced apart. The operating sleeve 12 has an extension tube portion 121 at the other end of the assembly end portion 120, and the inner portion of the operation sleeve 12 is formed between the assembly end portion 120 and the extension tube portion 121. The partition portion 126 of the hole partitions the internal space of the operating sleeve 12 into an assembly space 127 located in the assembly end portion 120 and an active space 128 in the extension tube portion 121, the assembly end portion 120 being external The circumferential surface forms an outwardly projecting fin portion 123. The assembly space 127 of the operating sleeve 12 forms a mounting opening 1201 at the outer end portion of the assembly end portion 120. The assembled end portion 120 is in the movable space 128. A locking flange 1202 is formed adjacent to the mounting opening 1201. The assembly end portion 120 forms a plurality of pressing elastic pieces 125 on the outer peripheral wall adjacent to the extending tube portion 121, and a notch 124 located at the periphery of the pressing elastic piece 125 and communicating with the movable space 128, pressing One end of the elastic piece 125 adjacent to the locking flange 1202 is a free end, and the other end of the pressing elastic piece 125 is connected to the extending pipe portion 121, so that the pressing elastic piece 125 has elasticity capable of radial movement and recovery, so that the engaging end portion 112 of the receiving sleeve 11 is provided. The assembly is connected to the assembly end portion 120 of the operating sleeve 12, and the hook 114 extends into the assembly opening 1201 and is hooked at the locking flange 1202, and can be pushed against the locking flange by the pressing elastic piece 125. 1202, the engaging end portion 112 of the receiving sleeve 11 can be disassembled from the assembled end portion 120 of the operating sleeve 12.

As shown in FIG. 4 and FIG. 5, in the operation sleeve 12, the partition portion 126 can form a shaft tube portion 129 extending axially into the movable space 128 at the periphery of the hole, and the shaft tube portion 129 provides an injection pusher 3 to be inserted therein.

As shown in FIG. 1 and FIG. 2, the drug container 2 is a disposable component, and the drug container 2 is replaceably mounted in the combined syringe body 1. In a preferred embodiment, the medicament container 2 comprises a container body 20, a closed end cap 22 and a piston 21. The container body 20 is a hollow body for accommodating an injection medicament, and the container body 20 comprises The first end and the second end are respectively located at two axial ends of the container body 20. The space in the container body 20 forms an opening in each of the first end and the second end. Closed end The cover 22 is sealed at the opening of the first end of the container body 20, and the piston 21 is airtight and axially movable to be disposed at the second end of the container body 20.

As shown in FIG. 1 , FIG. 2 and FIG. 4 , in the preferred embodiment, the closed end cover 22 includes a closed cover 220 and an outer cover 221 , and the closed cover 220 is rubber or the like. The member made of the material is installed at the opening of the first end of the container body 20, and the outer cover 221 covers the outer side of the closed cover 220 to seal the opening of the first end of the container body 20 with the closed cover 220. A hole is formed in the outer cover body 221, so that the middle portion of the closed cover body 220 corresponding to the opening of the first end of the container body 20 is exposed to provide a position for the needle 4 to be inserted into the interior of the container body 20, the medicament The container 2 is detachably assembled and positioned in the assembly space of the accommodating sleeve 11 of the combined syringe body 1 and the operating sleeve 12, so that the first end of the container body 20 with the closed end cap 22 is inserted into the accommodating space. In the needle connecting end portion 111 outside the sleeve 11, the second end of the container body 20 is abutted by the partition portion 126 in the operating sleeve 12, and the drug container 2 is fixed inside the combined syringe body 1.

As shown in FIG. 1 and FIG. 2, the injection pusher 3 is axially movably mounted in the combined syringe body 1 and can be coupled to the piston 21 of the medicament container 2, in the preferred embodiment, The injection pusher 3 includes a rod body 30 and an operating member 33. The rod body 30 includes a rod end portion 301 and a rod connecting portion 302. The rod end portion 301 and the rod connecting portion 302 are located in the rod body. At the 30 axial ends, the rod body 30 can be inserted into the combined syringe body 1 and can directly abut the piston 21 of the medicament container 2 with the rod end portion 301, or the rod end portion 301 can be combined with a circular shape. The rod end block 31 is abutted against the piston 21 of the medicament container 2 by the rod end block 31, and the rod body 30 is connected The joint 302 extends out of the operating sleeve 12 of the combined syringe body 1, and the operating member 33 is located outside the operating sleeve 12 to assemble the rod connecting portion 302 of the rod body 30.

As shown in FIG. 1, FIG. 2 and FIG. 4, the needle 4 is a disposable member, and the needle 4 includes a set of joints 40 and a needle body 41 having a pinhole therein. The section of the needle body 41 extending outside the socket portion 40 is an injection section, and the section in the socket portion 40 is a puncture section, and the needle 4 is a sleeve portion 40 thereof. The sleeve is fixed to the outside of the first end of the drug container 2 which protrudes outside the combined syringe body 1 and has the closed end cap 22, and the piercing section of the needle 41 is pierced through the closed cover 220 of the closed end cap 22 and protrudes into the medicament Inside the container 2.

As shown in FIG. 1 to FIG. 3 and FIG. 5, the cover 5 has a hollow cover body with an open end at one end and a closed end at the other end, and can be sleeved on the needle 4 and the receiving sleeve of the combined syringe body 1. The outer side of the sleeve 11 prevents the user or others from stabbing the needle 4. In the preferred embodiment, the cover 5 can form a strip-shaped clamping portion 51 on the side of the cover 50, so that the cover 5 can be It is clamped to the object by the clamping portion 51.

As shown in FIG. 2, FIG. 4 and FIG. 5, in the preferred embodiment, the injection pusher 3 further includes a sliding sleeve 32. The sliding sleeve 32 includes a set of bodies 321 and a shape formed at one end of the sleeve 321 . The fixing portion 322 is movably inserted into the movable space 128 of the extending tube portion 121 of the operating sleeve 12 and located outside the shaft tube portion 129, and the fixing portion 322 is assembled to the rod body 30. The rod connecting portion 302 and the operating member 33, the outer peripheral surface of the sleeve body 321 forms a plurality of guiding grooves 323, each of the guiding grooves 323 includes an axially extending straight groove portion 3231 and an obliquely extending oblique groove portion 3232. Complex guide The 323 series is disposed on the outer peripheral surface of the end surface of the sleeve 321 away from the fixing portion 322. The inclined groove portion 3232 of each guiding groove 323 is adjacent to one end of the fixing portion 322 and is connected to one end of the straight groove portion 3231 adjacent to the fixing portion 322. One end of the groove portion 3232 away from the fixing portion 322 is connected to the one end of the straight groove portion 3231 of the side adjacent guide groove 323 away from the fixing portion 322, so that each two adjacent guiding grooves 323 are connected to each other; the operation sleeve 12 is A plurality of guiding protrusions 1281 are formed on the peripheral wall of the movable space 128 of the extension tube portion 121. Each of the guiding protrusions 1281 is respectively placed in a corresponding position in the corresponding guiding groove 323, whereby the guiding protrusion 1281 is located at the sliding position. When the straight groove portion 3231 of the guide groove 323 of the sleeve 32 is provided, the injection push rod 3 can axially push the piston 21 of the drug container 2 installed in the combined syringe body 1 and control the injection amount by the length of the straight groove portion; When the guiding protrusion 1281 is located at the chute portion 3232 of the guide groove 323, the injection push rod 3 can be moved in a spiral manner in the reverse direction, and the operation convenience is relatively labor-saving.

As shown in FIG. 2, FIG. 4 and FIG. 5, in the preferred embodiment, the sliding sleeve 32 of the injection pusher 3 has an annular baffle 324 having an inner hole and a hollow hole from the inner hole. The connecting portion 325 extending in the distal direction of the connecting portion 322 forms an assembly space between the connecting portion 325 and the inner wall of the fixing portion 322, and the peripheral wall of the connecting portion 325 is provided with a plurality of slits 3251 extending axially from the end thereof to make the connecting tube The portion 325 has an elasticity of expansion and recovery. A plurality of engaging holes 326 are formed in the fixing portion 322 of the sliding sleeve 32 adjacent to the annular baffle 324. The engaging holes 326 communicate with the assembly space, and the rod 30 is connected by a rod. A radially protruding ring flange 304 is formed on the portion 302. The end of the rod connecting portion 302 forms a flange 305. The rod body 30 extends into the sliding sleeve 32, and the rod connecting portion 302 of the rod body 30 is correspondingly inserted into the sliding portion 32. Set of 32 inside the take-over department In 325, the ring flange 304 abuts against the side end of the annular baffle 324, and the flange 305 is abutted against the end of the connecting portion 325. The operating member 33 includes a knob portion 331 and a shaft formed inside the knob portion 331. A plurality of fixing hooks 333 are formed at the end of the sleeve portion 332, and the knob portion 331 is sleeved on the outside of the fixing portion 322 of the sliding sleeve 32, and the sleeve portion 332 is extended. The assembly space in the fixing portion 322 is sleeved on the outside of the connecting portion 325, and the plurality of fixing hooks 333 are respectively engaged in the engaging holes 326 of the fixing portion 322 of the sliding sleeve 32 to make the operating member 33 and slide. The sleeve 32 and the rod body 30 are fixed together, and the outer peripheral surface of the knob portion 331 of the operating member 33 can be formed with an uneven sliding portion.

In the preferred embodiment shown in FIG. 1 and FIG. 2, in the combined syringe body 1, the engaging end portion 112 of the receiving sleeve 11 can further form a plurality of alignments on the side end of the annular flange 113. The convex portion 115, the alignment convex portion 115 and the hooks 114 are staggered; the assembly end portion 120 of the operation sleeve 12 can further form a plurality at the assembly opening corresponding to the alignment convex portion 115. The aligning concave portion 122 is configured to firmly join the joint end portion 112 of the accommodating sleeve 11 and the joint end portion 120 of the operating sleeve 12 by the concave and convex portions of the aligning convex portion 115 and the aligning concave portion 122. .

As shown in FIG. 6, in the preferred embodiment of the present invention, a medicament container 2 containing a fixed dose of a medicament for injection is mounted on a combined syringe body composed of a receiving sleeve 11 and an operating sleeve 12. 1 inside, and the rod end piece 31 disposed on the rod body 30 of the injection push rod 3 disposed in the operating sleeve 12 abuts the piston 21 in the drug container 2, and then the needle 4 is sleeved on the combined syringe body The needle of the needle 1 is connected to the end portion 111, so that the puncture portion of the needle body 41 of the needle 4 is pierced through the closed lid body 220 of the closed end cap 22 The inside of the medicament container 2 is placed such that the syringe is in the shape of a pen to provide the user with an injection.

As shown in FIG. 7, when the medicine container 2 is to be replaced, the user first removes the used needle 4 from the needle connecting end portion 111 of the combined syringe body 1, and then accommodates the sleeve of the combined syringe body 1. 11 and the operating sleeve 12 are disassembled to take out the used drug container 2, wherein when the receiving sleeve 11 and the operating sleeve 12 are disassembled, the pressing elastic piece 125 on the operating sleeve 12 is first pressed to press the elastic piece The urging sleeve 11 is separated from the operating sleeve 12 by axially pulling the accommodating sleeve 11 containing the medicament container 2 from the side end of the operating sleeve 12, Then, the used drug container 2 can be taken out from the accommodating sleeve 11, and the drug container 2 containing the fixed-dose injection drug can be replaced and reassembled.

As can be seen from the above description, in the syringe proposed by the present invention, only the needle 4 relating to the use of safety and the drug container 2 containing the fixed-dose injection medicine are disposed as a disposable member, and the other combined syringe body 1 is injected. The rod 3 and the cover 5 can be reused many times, which can improve the material waste problem of all components discarded after the use of the existing syringe.

1‧‧‧Combined syringe body

11‧‧‧Receiving sleeve

111‧‧‧Needle connection end

112‧‧‧ joint end

113‧‧‧ annular flange

114‧‧‧ hook

115‧‧‧ alignment convex

12‧‧‧Operating sleeve

120‧‧‧Group end

1201‧‧‧ Assembly port

1202‧‧‧Card flange

121‧‧‧Extension tube

122‧‧‧ alignment recess

123‧‧‧Flap section

124‧‧‧ Missing slot

125‧‧‧Pressing shrapnel

126‧‧ ‧Baffle Department

127‧‧‧ Assembly space

128‧‧‧Event space

1281‧‧‧Guided convex

129‧‧‧ shaft tube department

2‧‧‧pharmaceutical container

20‧‧‧ container body

21‧‧‧Piston

22‧‧‧Closed end caps

220‧‧‧Closed cover

221‧‧‧Outer cover

3‧‧‧Injection putter

30‧‧‧ rod body

301‧‧‧ rod end

302‧‧‧ rod connection

304‧‧‧ ring flange

305‧‧‧Flange

31‧‧‧ rod end block

32‧‧‧Sleeve

321‧‧‧

322‧‧‧Fixed Department

323‧‧ ‧ guide slot

3231‧‧‧ Straight groove

3232‧‧‧ chute

324‧‧‧ ring baffle

325‧‧‧Receipt Department

3251‧‧‧ slitting

326‧‧‧ card hole

33‧‧‧Operating parts

331‧‧‧ knob section

332‧‧‧Set of joint management department

333‧‧‧Fixed hook

4‧‧‧ needle

40‧‧‧ Sockets

41‧‧‧ needle

5‧‧‧ Cover

50‧‧‧ cover

51‧‧‧Clamping Department

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective exploded view of a preferred embodiment of the present inventive syringe.

Figure 2 is a schematic illustration of a preferred embodiment of the preferred embodiment of the syringe of Figure 1.

Figure 3 is a perspective view showing the appearance of a preferred embodiment of the syringe of Figure 1.

Figure 4 is a cross-sectional view showing a preferred embodiment of the syringe of Figure 1.

Figure 5 is another cross-sectional view of the preferred embodiment of the syringe of Figure 1.

Figure 6 is a reference view of the state of use of the preferred embodiment of the syringe of Figure 1 at the time of injection.

Figure 7 is a schematic view showing the operation of disassembling after the injection, which is a preferred embodiment of the syringe shown in Figure 1.

1‧‧‧Combined syringe body

11‧‧‧Receiving sleeve

111‧‧‧Needle connection end

112‧‧‧ joint end

113‧‧‧ annular flange

114‧‧‧ hook

115‧‧‧ alignment convex

12‧‧‧Operating sleeve

120‧‧‧Group end

1201‧‧‧ Assembly port

1202‧‧‧Card flange

121‧‧‧Extension tube

122‧‧‧ alignment recess

123‧‧‧Flap section

124‧‧‧ Missing slot

125‧‧‧Pressing shrapnel

2‧‧‧pharmaceutical container

20‧‧‧ container body

21‧‧‧Piston

22‧‧‧Closed end caps

220‧‧‧Closed cover

221‧‧‧Outer cover

3‧‧‧Injection putter

30‧‧‧ rod body

31‧‧‧ rod end block

32‧‧‧Sleeve

33‧‧‧Operating parts

4‧‧‧ needle

40‧‧‧ Sockets

41‧‧‧ needle

5‧‧‧ Cover

50‧‧‧ cover

51‧‧‧Clamping Department

Claims (11)

A syringe includes: a combined syringe body comprising a receiving sleeve and an operating sleeve, the receiving sleeve and the operating sleeve being axially penetrating hollow bodies, the receiving sleeve comprising a needle connecting end portion and an engaging end portion are located at two ends of the receiving sleeve axial direction, the operating sleeve includes a set of connecting end portions, and the assembled end portions are detachably assembled to the receiving sleeve a joint container; the medicament container is replaceably mounted in the combined syringe body, the medicament container comprising a hollow container body, a closed end cap and a piston, the closed end cap being fixed to the container An opening formed at one end of the body, the piston is airtight and axially movable, and is disposed inside the opening formed at the other end of the container body, and the medicament container has a closed end cover at one end of the container body. a needle insertion end of the cartridge; an injection pusher comprising a rod body and an operating member disposed at one end of the rod body, the rod system being axially movable and mounted in the body of the combined syringe and capable of connecting the medicament container Piston The needle is located on the outer side of the operating sleeve of the combined syringe; the needle includes a set of joints and a needle body having a pinhole therein, the needle body is fixedly fixed in the sleeve portion, and the needle is sleeved The sleeve is fixed to the needle connecting end of the combined syringe body, so that the needle body extends through the closed end cover and protrudes into the interior of the medicament container; and a cover is detachably assembled to the needle and the combined syringe body Place the outside of the sleeve. The syringe according to claim 1, wherein the engaging end of the receiving sleeve is formed with an annular flange and the plurality of side ends of the annular flange are formed. a spacer that is arranged at intervals; the operating sleeve has an extension tube portion at the other end of the assembly end portion, and a partition portion having a middle hole is formed between the assembly end portion and the extension tube portion inside the operation sleeve Separating the inner space of the operating sleeve into an assembly space in the assembly end portion and an active space in the extension tube portion, the outer peripheral surface of the assembly end portion forming an outwardly projecting wing portion, the operation sleeve The assembly space of the cylinder forms a fitting opening at the outer end portion of the assembly end portion, and the assembly end portion forms a snap-in flange adjacent to the assembly opening in the movable space, and the assembly end portion is adjacent to the outer circumference of the extension tube portion. The wall forms a plurality of pressing elastic pieces and a notch located at a periphery of the pressing elastic piece and communicating with the movable space. One end of the pressing elastic piece adjacent to the locking flange is a free end, and the other end of the pressing elastic piece is connected with the extending pipe part. The syringe of claim 2, wherein the engaging end of the receiving sleeve forms a plurality of alignment protrusions at a side end of the annular flange, and the plurality of alignment protrusions are staggered with the plurality of hooks; The assembly end portion of the operation sleeve further forms a plurality of alignment concave portions corresponding to the alignment convex portions at the assembly opening thereof, and the engagement ends of the accommodation sleeves are matched by the concave and convex portions of the alignment convex portions and the alignment concave portions The portion is assembled with the assembly end of the operating sleeve. The syringe according to claim 2, wherein, in the operating sleeve, the partition portion forms a shaft tube portion extending axially into the movable space at a periphery of the hole, and the injection portion is provided by the shaft tube portion The rod is worn through it. The syringe according to claim 3, wherein in the operating sleeve, the partition portion forms a shaft tube portion extending axially into the movable space at a periphery of the hole, and the injection portion is provided by the shaft tube portion The rod is worn through it. The syringe according to any one of claims 1 to 5, wherein The closed end cover comprises a rubber-made closed cover body and an outer cover body. The closed cover body is installed at an opening of one end of the container body, and the cover system covers the outer side of the cover body to seal the cover body. An opening is formed in one end of the body, and a hole is formed in the outer cover body, so that the closed cover body is exposed to the outer section corresponding to the opening of one end of the container body. The syringe according to any one of claims 2 to 5, wherein the rod of the injection pusher comprises a rod end and a rod connecting portion at both axial ends of the rod; the injection push rod is still The utility model comprises a sliding sleeve, the sliding sleeve comprises a set body and a fixing portion formed at one end of the sleeve body, the sleeve system is movably inserted into the movable space of the extending pipe portion of the operating sleeve and located outside the shaft tube portion. The fixing portion is connected to the rod connecting portion of the rod body and the operating member, and the outer peripheral surface of the sleeve is formed with a plurality of guiding grooves, each of the guiding grooves comprises an axially extending straight groove portion and an obliquely extending oblique groove portion The plurality of guiding grooves are disposed on the outer circumferential surface of the end surface of the sleeve body away from the fixing portion, and one end of the inclined groove portion of each guiding groove is connected to one end of the straight groove portion adjacent to the fixing portion, and the inclined groove portion is away from the end portion of the fixing groove portion. One end of the fixing portion is connected to the one end of the straight groove portion of the side adjacent to the guiding portion, so that each two adjacent guiding grooves are connected in series; the operating sleeve forms a plurality of peripheral walls of the movable space of the extending pipe portion thereof. Guide protrusions, each of which is placed in a corresponding position in the corresponding guide groove The syringe according to claim 7, wherein in the injection pusher, an annular baffle having an inner hole and a connecting portion extending from the inner hole edge toward the end of the fixing portion are formed inside the sliding sleeve, and the pipe is taken over. Forming space is formed between the portion and the inner wall of the fixing portion, and the peripheral wall of the connecting portion is disposed in plural a slit extending axially at the end, a fastening hole of the sliding sleeve is formed adjacent to the annular baffle to form a plurality of connecting holes of the connecting space, and a rod protruding portion of the rod body forms a radially protruding ring flange a flange is formed at the end of the rod connecting portion, and the rod body extends into the sliding sleeve. The rod connecting portion of the rod body is correspondingly inserted into the connecting portion in the sliding sleeve, and the ring flange abuts against the side end of the annular baffle, and the flange abuts Connected to the end of the connecting portion, the operating member comprises a knob portion and a sleeve tube portion formed in the axial direction of the knob portion, the end of the sleeve portion forms a plurality of fixing hooks, and the operating member is sleeved with the knob portion thereof The sleeve portion extends outside the fixing portion of the sliding sleeve, and the sleeve portion extends into the assembly space in the fixing portion and is sleeved outside the connecting portion, and the plurality of fixing hooks are respectively fastened to the engaging holes of the fixing portion of the sliding sleeve The operating member, the sliding sleeve and the shaft are fixed together. The syringe according to claim 8, wherein the outer peripheral surface of the knob portion of the operating member is formed with a concave-convex sliding portion. The syringe according to claim 9, wherein the closed end cover comprises a rubber-made closed cover body and an outer cover body, and the closed cover body is installed at an opening of one end of the container body, and the outer cover system is covered. The outer side of the cover body is closed to seal the closed cover body at one end of the container body, and a hole is formed in the outer cover body so that the middle portion of the closed cover body corresponding to the opening of the container body is exposed. The syringe according to claim 10, wherein the cover has a hollow cover body having an open end at one end and a closed end at the other end, and a strip-shaped clamping portion is formed on a side of the cover body.