CN203090100U - Syringe with a needle - Google Patents

Abstract

The utility model relates to a syringe, which includes a combined syringe body, a medicine container, an injection push rod, a needle and a protective cover. The combined syringe body is mainly composed of an accommodation sleeve and an operating sleeve that can be disassembled. It is assembled so that a medicine container containing a fixed dose of injection medicine can be replaceably assembled therein, the injection push rod assembled in the operating sleeve can push the piston in the medicine container, and the needle is detachably installed. On the accommodating sleeve, the needle body of the needle penetrates the closed end cap of the pharmaceutical container and extends into it. The protective cover is removably set on the outside of the needle and the accommodating sleeve, so as to utilize the fixed dose of injection medication contained inside. The pharmaceutical container and needle are disposable components to ensure the safety of injectable pharmaceuticals. The remaining components can be reused multiple times, saving materials and reducing unnecessary material waste.

Description

syringe

technical field

The utility model relates to a syringe, in particular to a utility model composed of a fixed-dose syringe. the

Background technique

At present, such as insulin injection, small needle beauty, etc., all use a syringe to extract a predetermined dose of medicament from an ampoule containing the injection medicament, and then penetrate the human body through the needle at the front end of the syringe to inject the medicament into the human body. the

When the existing general syringe is in use, because its components are all in contact with the drug, based on the safety of the injection, all the components of the entire syringe need to be discarded after use, so the cost of the syringe is high for patients. Not less, causing a heavy burden on the treatment, and the amount of waste of used syringes is too much. In addition, because the syringe draws a predetermined dose of medicine from the ampoule containing the injection medicine, and then injects it on the human body. During this process, using the syringe to draw medicine and inject it is not easy to ensure the quality of fixed-dose injection administration. The method of drawing the medicine from the ampoule containing the injection medicine has the risk of contamination of the medicine in the syringe. the

Utility model content

The main purpose of the utility model is to provide a syringe, hoping that the utility model can improve the waste material problem that all components of the existing syringe are discarded after use. the

For achieving said purpose, the syringe proposed by the utility model includes:

A combined syringe body, which includes an accommodating sleeve and an operating sleeve, the accommodating sleeve and the operating sleeve are hollow bodies that pass through the axial direction, and the accommodating sleeve includes a needle connection end and One joint end is located at the two axial ends of the accommodating sleeve respectively. The operation sleeve includes a set of joint ends which can be detachably assembled to the joint end of the accommodating sleeve. ;

A medicament container, which is replaceably installed in the combined syringe body, the medicament container includes a hollow container body, a closed end cap and a piston, and the closed end cap is fixedly connected to a hole formed by one end of the container body. At the opening, the piston is airtightly and axially movable assembled inside the opening formed at the other end of the container body, and the end of the container body with the closed end cap of the medicament container is located at the needle connection end of the accommodating sleeve. Ministry;

An injection push rod, which includes a rod body and an operating part arranged at one end of the rod body. The rod body is axially movable and installed in the combined syringe body and can be connected to the piston of the medicament container. The operating part is located at the operating part of the combined syringe. Connecting rod outside the sleeve;

A needle, which includes a socket part and a needle body with a needle hole inside, the needle body is fixed through the socket part, and the needle head is socketed and fixed on the needle connection end of the combined syringe body with its socket part, allowing the needle body to extend into the interior of the medicament container through the closed end cap; and

A protective cover is detachably sleeved on the outside of the housing sleeve of the needle and the combined syringe body. the

Preferably, the joint end of the accommodating sleeve is formed with an annular flange and a plurality of hooks arranged at intervals at the side end of the annular flange; The inner space of the operating sleeve is divided into an assembly space located in the assembled end and an assembly space located in the extension tube. In the movable space in the pipe part, the outer peripheral surface of the assembly end forms an outwardly protruding fin part, and the assembly space of the operation sleeve forms an assembly port at the outer end of the assembly end, and the assembly end A clamping flange is formed in the movable space adjacent to the assembly port, and a plurality of pressing elastic pieces and slots located on the periphery of the pressing elastic pieces and connected to the movable space are formed on the outer peripheral wall of the assembly end adjacent to the extension pipe portion. One end adjacent to the clamping flange is a free end, and the other end of the pressing spring is connected to the extension pipe. the

Preferably, the joint end of the accommodating sleeve is formed with a plurality of alignment protrusions at the side end of the annular flange, and the plurality of alignment protrusions and the plurality of hooks are arranged in a staggered manner; the operation sleeve The assembly end of the assembly port is further formed with a plurality of alignment concave parts corresponding to the alignment convex parts. Through the concave-convex cooperation of the alignment convex parts and the alignment concave parts, the joint end of the accommodating sleeve and the operation The ganged ends of the sleeves are ganged together. the

Preferably, in the operation sleeve, the baffle part forms a shaft tube part axially extending into the movable space at the periphery of the hole in the partition part, and the shaft tube part provides an injection push rod passing through it. the

Preferably, the closed end cap includes a rubber closed cover and an outer cover, the closed cover is installed at the opening at one end of the container body, and the outer cover covers the outer side of the closed cover to seal the closed cover The body seals the opening at one end of the container body, and a hole is formed in the outer cover body, so that the middle section of the closing cover corresponding to the opening at one end of the container body is exposed outside. the

Preferably, the rod body of the injection push rod includes a rod end and a rod connecting portion respectively located at the two axial ends of the rod body; the injection push rod also includes a sliding sleeve, which includes a sleeve body and a forming The fixing part at one end of the sleeve body, the sleeve body can movably extend into the activity space of the extension tube part of the operating sleeve and is located outside the shaft tube part, the fixing part is assembled with the rod connecting part of the rod body and the operating sleeve. A plurality of guide grooves are formed on the outer peripheral surface of the sleeve, and each of the guide grooves includes an axially extending straight groove portion and an obliquely extending inclined groove portion. The outer peripheral surface of the end surface of the connecting part, one end of the inclined groove part of each guide groove adjacent to the fixed part is connected to one end of the straight groove part adjacent to the fixed part, and the end of the inclined groove part far away from the fixed part is connected to the straight side of the adjacent guide groove. The groove part is far away from one end of the fixed part, so that every two adjacent guide grooves are connected in series; the operation sleeve is formed with a plurality of guiding protrusions on the surrounding wall of the movable space of the extension pipe part, and each guiding protrusion Put them into the corresponding position in the corresponding guide groove respectively. the

Preferably, in the injection push rod, an annular baffle with an inner hole and a connecting pipe extending from the edge of the inner hole toward the end of the fixed part are formed inside the sliding sleeve, and the connection between the connecting part and the inner wall of the fixed part A joint space is formed between them, and the peripheral wall of the connecting pipe part is distributed with a plurality of slits extending axially from its end. On the fixed part of the sliding sleeve, a plurality of snap-fit holes connecting the joint space are formed adjacent to the annular baffle plate. A radially protruding ring flange is formed on the rod connecting portion of the rod body, and a flange is formed at the end of the rod connecting portion, the rod body extends into the sliding sleeve, and the rod connecting portion of the rod body is correspondingly inserted into the connecting pipe portion in the sliding sleeve, The ring flange abuts against the side end of the annular baffle, and the flange abuts against the end of the connecting pipe part. The operating part includes a knob part and an axially protruding fitting pipe part formed inside the knob part. The fitting pipe There are a plurality of fixed hooks formed at the end of the part, the operating part is sleeved on the outside of the fixed part of the sliding sleeve with its knob part, and the sleeve tube part extends into the assembly space in the fixed part and is sleeved on the outside of the connecting part, and the A plurality of fixing hooks are respectively buckled in the fastening holes of the fastening part of the sliding sleeve, so that the operating part, the sliding sleeve and the rod body are fixedly connected together. the

Preferably, the outer peripheral surface of the knob part of the operating member forms a concave-convex anti-slip part. the

With the composition structure of this syringe, it at least includes the following advantages:

1. High safety: the syringe of the utility model enables its medicament container to encapsulate a fixed dose of injection medicament, so that the medicament in the container body is completely isolated from the human body bacteria, and the risk of contamination can be directly eliminated, and the utility model can make The medicament container and the medicament for injection encapsulated in it are standardized products, which can ensure the quality of fixed-dose injection and achieve good safety in use. the

2. Easy to use: In the syringe of the present utility model, the accommodating sleeve and the operating sleeve of the combined syringe body are a combined structure that can be easily disassembled, making it easy to assemble and replace the drug container. Furthermore, the syringe of the present utility model can be filled with a bullet-like medicament filling mechanism. When in use, it can save the time that a general syringe must extract the medicament from the ampoule containing the injection medicament, so the utility model can be used for injecting medicament to patients. , providing a good helper that is easy to use and labor-saving. the

3. Compliant with environmental protection: In the syringe of the utility model, the needle and the drug container are replaceable disposable components to ensure the safety of the injected drug, and the remaining components such as the combined syringe body, injection push rod and protective cover are It can be used repeatedly. Compared with the existing syringe products that are used once and discarded as a whole, the use of the syringe of the present invention can reduce unnecessary waste of materials, and the user only needs to buy a medicine container with a fixed dose of injection medicine inside. It can be combined with the needle, that is, it can be combined with the combined syringe body and the injection push rod, so it can save materials and reduce the cost of use. the

The secondary purpose of this utility model is to make the injection push rod of the syringe further add a sliding sleeve between the rod body and the operating part, and use the outer peripheral surface of the sliding sleeve to form a guide groove including a straight groove part and a chute part. The guide convex part of the inner wall of the operation sleeve of the combined syringe body extends into the guide groove, so that the injection push rod can push the piston of the medicine container in the combined syringe body in an axial straight way to inject, and the straight groove part is used to inject The length controls the injection volume, eliminating the inaccuracy of the injection mode of drug administration controlled by human factors; in addition, the injection push rod can move in the opposite direction in a spiral manner, and the injection push rod is pulled out from the combined syringe body backward, It has less labor-saving operation convenience. the

Another secondary purpose of this utility model is to make the accommodation sleeve and the operation sleeve of the combined syringe body a snap-fit component, and have a pressing spring to provide the user with a simple pressing method to release the accommodation sleeve and the operation sleeve. The locking state between the sleeves makes the combined syringe body easy to disassemble and assemble the medicament container. the

Description of drawings

Fig. 1 is a three-dimensional exploded schematic view of a preferred embodiment of the syringe of the present invention. the

Figure 2 is a detailed exploded schematic view of the preferred embodiment of the syringe shown in Figure 1 . the

Fig. 3 is a schematic perspective view of the combination of the preferred embodiment of the syringe shown in Fig. 1 . the

Fig. 4 is a schematic cross-sectional view of a preferred embodiment of the syringe shown in Fig. 1 . the

Fig. 5 is another schematic cross-sectional view of the preferred embodiment of the syringe shown in Fig. 1 . the

Fig. 6 is a reference view of the preferred embodiment of the syringe shown in Fig. 1 in use during injection. the

Fig. 7 is a schematic diagram of disassembly operation of the preferred embodiment of the syringe shown in Fig. 1 after injection. the

Explanation of reference numbers:

1 combined syringe body

11 Accommodating sleeve 111 Needle connection end

112 joint end 113 annular flange

114 hook 115 alignment convex part

12 operating sleeve 120 assembly end

1201 Assembly port 1202 Carding flange

121 Extension tube part 122 Alignment concave part

123 wing part 124 lack of slot

125 Press shrapnel 126 Partition board

127 assembly space 128 activity space

1281 guide convex part 129 shaft tube part

2 drug containers

20 container body 21 piston

22 Closed end cap 220 Closed cover body

221 outer cover body

3 injection push rod

30 rod body 301 rod end

302 rod connection part 304 ring flange

305 flange

31 rod body end block

32 sliding sleeves 321 sleeves

322 fixed part 323 guide groove

3231 straight groove part 3232 inclined groove part

324 ring baffle 325 connecting part

3251 Slit 326 Snap Hole

33 Operating parts 331 Knob part

332 Fitting pipe part 333 Fixed hook

4 needles

40 socket part 41 needle body

5 Covers 50 Covers

51 clamping part

Detailed ways

Below in conjunction with accompanying drawing and preferred embodiment of the present utility model, further set forth the technical means that the present utility model takes for reaching predetermined utility model purpose. the

As shown in Figure 1, it discloses a preferred embodiment of the syringe of the present invention, which includes a combined syringe body 1, a medicament container 2, an injection push rod 3, a needle 4 and a protective cover 5, wherein :

As shown in Figures 1 and 2, the combined syringe body 1 includes an accommodating sleeve 11 and an operating sleeve 12, the accommodating sleeve 11 is a hollow body axially penetrating inside, the The accommodating sleeve 11 includes a needle connecting end 111 and an engaging end 112, the needle connecting end 111 and the engaging end 112 are respectively located at the two axial ends of the accommodating sleeve 11, and the operating sleeve 12 It is a hollow body axially penetrating inside. The operating sleeve 12 includes a connecting end 120, and the connecting end 120 is detachably assembled to the connecting end of the accommodating sleeve 11 112 , through the combination of the accommodating sleeve 11 and the operating sleeve 12 , the medicine container 2 is placed and positioned therein. the

As shown in Figure 1, Figure 2 and Figure 4, in this preferred embodiment, the joint end 112 of the housing sleeve 11 is formed with an annular flange 113 and a plurality of side ends of the annular flange 113 are arranged at intervals. The hook 114; the operation sleeve 12 has an extension pipe portion 121 at the other end of the assembly end portion 120, and an inner portion of the operation sleeve 12 is formed between the assembly end portion 120 and the extension pipe portion 121. The partition part 126 of the hole divides the inner space of the operation sleeve 12 into an assembly space 127 in the assembly end 120 and an activity space 128 in the extension pipe part 121, and the outer peripheral surface of the assembly end 120 An outwardly protruding wing portion 123 is formed, and the assembly space 127 of the operation sleeve 12 is formed with a fitting 1201 at the outer end of the assembling end 120 , which is adjacently assembled in the movable space 128 A clamping flange 1202 is formed at 1201, and a plurality of pressing elastic pieces 125 and a slot 124 located around the pressing elastic pieces 125 and connected to the movable space 128 are formed on the outer peripheral wall of the assembled end portion 120 adjacent to the extension pipe portion 121. One end of 125 adjacent to the clamping flange 1202 is a free end, and the other end of the pressing elastic piece 125 is connected to the extension pipe portion 121, so that the pressing elastic piece 125 has the elasticity of radial movement and recovery, so that the joint end 112 of the accommodating sleeve 11 is set Connected to the assembly end 120 of the operation sleeve 12, the hook 114 extends into the assembly 1201 and is hooked at the locking flange 1202, and can be pushed against the hook 114 by the pressing spring 125 to break away from the locking flange 1202. Thus, the joint end 112 of the receiving sleeve 11 can be disassembled from the assembly end 120 of the operation sleeve 12 . the

As shown in Figures 4 and 5, in the aforementioned operating sleeve 12, the partition portion 126 can also form a shaft tube portion 129 extending axially into the movable space 128 at the periphery of the middle hole, and the shaft tube portion 129 provides that the injection push rod 3 passes therethrough. the

As shown in Figures 1 and 2, the medicament container 2 can hold the medicament for injection and is a disposable member. The medicament container 2 is replaceably installed in the combined syringe body 1. In this preferred In the embodiment, the medicament container 2 includes a container body 20, a closed end cap 22 and a piston 21, the container body 20 is a hollow body for containing the medicament for injection, and the container body 20 includes a first One end and a second end, the first end and the second end are respectively located at the two axial ends of the container body 20, the space in the container body 20 forms an opening in the first end and the second end, and the closed The end cap 22 is sealed at the opening of the first end of the container body 20 , and the piston 21 is assembled at the second end of the container body 20 so as to be airtight and able to move axially. the

As shown in Figures 1, 2 and 4, in this preferred embodiment, the closed end cap 22 includes a closed cover 220 and an outer cover 221, and the closed cover 220 is made of rubber or the like The finished member is installed at the opening of the first end of the container body 20, and the outer cover 221 covers the outside of the closing cover 220 and seals the closing cover 220 at the opening of the first end of the container body 20, A hole is formed in the outer cover 221, so that the middle section of the closing cover 220 corresponding to the opening of the first end of the container body 20 is exposed, so as to provide a place where the needle 4 is plugged and connected to the inside of the container body 20. The container 2 is detachably installed in the assembly space of the accommodating sleeve 11 and the operating sleeve 12 of the combined syringe body 1, so that the first end of the container body 20 sealed with the closed end cap 22 extends into the accommodating sleeve In the needle connection end 111 of the barrel 11 , the second end of the container body 20 is abutted by the partition portion 126 in the operation sleeve 12 , so that the medicine container 2 is fixed inside the combined syringe body 1 . the

As shown in Figures 1 and 2, the injection push rod 3 is axially movably installed in the combined syringe body 1 and can be connected to the piston 21 of the drug container 2. In this preferred embodiment, the The injection push rod 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 on two axial sides of the rod body 30 The rod body 30 can be passed through the combined syringe body 1, and the rod end 301 can directly abut the piston 21 of the medicine container 2, or the rod end 301 is combined with a circular rod end block 31, The end block 31 of the rod body abuts against the piston 21 of the medicine container 2, the rod connecting portion 302 of the rod body 30 protrudes outside the operating sleeve 12 of the combined syringe body 1, and the operating member 33 is located outside the operating sleeve 12. The rod connecting portion 302 of the rod body 30 . the

As shown in Fig. 1, Fig. 2 and Fig. 4, the needle 4 is a disposable member, and the needle 4 includes a socket 40 and a needle body 41 with a needle hole inside, and the needle body 41 passes through If it is fixed in the sleeve part 40, the section where the needle body 41 protrudes outside the sleeve part 40 is the injection section, and the section inside the sleeve part 40 is the puncture section. It is connected and fixed on the outer side of the first end with the closed end cap 22 protruding from the outer side of the combined syringe body 1 of the medicament container 2, and the puncture section of the needle body 41 is pierced through the closed cover 220 of the closed end cap 22 to extend into the medicament container 2 interior. the

As shown in FIGS. 1 to 3 and 5 , the cover 5 has a hollow cover with one end being an open end and the other end being a closed one, and can be sleeved on the needle 4 and the housing sleeve of the combined syringe body 1 The outer side of the barrel 11 is to prevent the user or others from being stabbed by the needle 4. In this preferred embodiment, the protective cover 5 can also form a strip-shaped clamping part 51 on the side of the cover body 50, so that the protective cover 5 can be Use the clamping part 51 to clamp on the object. the

As shown in Figure 2, Figure 4 and Figure 5, in this preferred embodiment, the injection push rod 3 also includes a sliding sleeve 32, and the sliding sleeve 32 includes a sleeve body 321 and a solid body formed at one end of the sleeve body 321. The connecting part 322, the sleeve body 321 can movably extend into the activity space 128 of the extension tube part 121 of the operating sleeve 12 and is located outside the shaft tube part 129, and the fixed part 322 is assembled with the rod connection part of the rod body 30 302 and the operation member 33, the outer peripheral surface of the sleeve 321 is formed with a plurality of guide grooves 323, and each of the guide grooves 323 includes an axially extending straight groove portion 3231 and an obliquely extending inclined groove portion 3232. Two guide grooves 323 are distributed on the outer peripheral surface of the end surface of the sleeve body 321 away from the fixed part 322, and one end of the inclined groove part 3232 of each guide groove 323 adjacent to the fixed part 322 is connected to the end of the straight groove part 3231 adjacent to the fixed part 322. At one end, the end of the chute part 3232 away from the fixed part 322 is connected to the straight groove part 3231 of the side adjacent guide groove 323 away from the end of the fixed part 322, so that every two adjacent guide grooves 323 are connected in series; the operating sleeve 12, a plurality of guiding protrusions 1281 are formed on the surrounding wall of the movable space 128 of the extension pipe portion 121, and each guiding protrusion 1281 is inserted into the corresponding position in the corresponding guide groove 323, so that when the guiding protrusions When the part 1281 is located in the straight groove part 3231 of the guide groove 323 of the sliding sleeve 32, the injection push rod 3 can axially push the piston 21 of the medicine container 2 installed in the combined syringe body 1, and utilize the straight groove part 3231 The length controls the injection volume; when the guiding convex portion 1281 is located at the chute portion 3232 of the guide groove 323, the injection push rod 3 can move in the opposite direction in a helical manner, and has less labor-saving operation convenience. the

As shown in Fig. 2, Fig. 4 and Fig. 5, in this preferred embodiment, an annular baffle 324 with an inner hole is formed inside the sliding sleeve 32 of the injection push rod 3 and a ring-shaped baffle plate 324 is fixed from the edge of the inner hole toward the The connection part 325 extending in the direction of the end of the part 322 forms an assembly space between the connection part 325 and the inner wall of the fixed part 322. The peripheral wall of the connection part 325 is distributed with a plurality of slits 3251 extending axially from its end, so that the connection The part 325 has the elasticity of expansion and recovery. A plurality of snap holes 326 are formed on the fixed part 322 of the sliding sleeve 32 adjacent to the annular baffle 324. The snap holes 326 communicate with the assembly space. The rod of the rod body 30 A radially protruding ring flange 304 is formed on the connecting portion 302, a flange 305 is formed at the end of the rod connecting portion 302, the rod body 30 extends into the inside of the sliding sleeve 32, and the rod connecting portion 302 of the rod body 30 is correspondingly inserted into the sliding sleeve 32 In the inner connecting part 325, the ring flange 304 abuts against the side end of the annular baffle 324, and the flange 305 abuts against the end of the connecting part 325 to form a combination. The operating part 33 includes a knob part 331 and a knob part formed on the knob part. The inside of 331 is an axially protruding fitting pipe portion 332, and a plurality of fixing hooks 333 are formed at the end of the fitting pipe portion 332. The fitting pipe part 332 extends into the assembly space in the fixed part 322 and is sleeved on the outside of the connecting part 325, and the plurality of fixing hooks 333 are respectively snapped into the engaging holes 326 of the fixed part 322 of the sliding sleeve 32. , so that the operating member 33 , the sliding sleeve 32 and the rod body 30 are firmly connected together, and the outer peripheral surface of the knob portion 331 of the operating member 33 can also form a concave-convex anti-slip portion. the

In the preferred embodiment shown in Figures 1 and 2, in the combined syringe body 1, the joint end 112 of the accommodating sleeve 11 can also further form a plurality of alignments at the side end of the annular flange 113 The plurality of alignment protrusions 115 and the plurality of hooks 114 are arranged in a staggered manner; the assembly end 120 of the operation sleeve 12 can also further form a plurality of corresponding alignment at its assembly port 1201. The alignment concave portion 122 of the alignment convex portion 115, through the concavo-convex cooperation between the alignment convex portion 115 and the alignment concave portion 122, the joint end 112 of the accommodating sleeve 11 and the assembly end 120 of the operation sleeve 12 are firmly connected. group together. the

As shown in Figure 6, when the preferred embodiment of the syringe of the present invention is in use, the drug container 2 containing the fixed-dose injection drug is installed inside the combined syringe body 1 composed of the accommodating sleeve 11 and the operating sleeve 12 , and make the rod body end block 31 on the rod body 30 of the injection push rod 3 assembled in the operation sleeve 12 contact the piston 21 in the medicine container 2, and then connect the needle head 4 to the needle head of the combined syringe body 1 The end 111 allows the puncture section of the needle body 41 of the needle 4 to pierce through the closing cap 220 of the closing end cap 22 and extend into the inside of the medicine container 2, so that the syringe is shaped like a pen for users to inject. the

As shown in Figure 7, when wanting to replace the medicine container 2, the user first removes the used needle 4 from the needle connection end 111 of the combined syringe body 1, and then removes the accommodating 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 disassembling the accommodating sleeve 11 and the operating sleeve 12, first press the pressing shrapnel 125 on the operating sleeve 12 to make the pressing shrapnel 125 Push the hook 114 away from the locking flange 1202, and then axially pull the accommodating sleeve 11 containing the medicine container 2 from the side end of the operating sleeve 12 to separate the accommodating sleeve 11 from the operating sleeve 12. Next, the used medicament container 2 is taken out from the accommodating sleeve 11, and the medicament container 2 containing the fixed-dose injection medicament is replaced, and reassembled. the

As can be seen from the above description, in the syringe proposed by the utility model, only the needle 4 related to the safety of use and the medicine container 2 containing a fixed-dose injection medicine are made as disposable components, and the rest of the combined syringe body 1, injection pusher, etc. The rod 3 and the protective cover 5 can be reused many times, so that it can improve the material waste problem of discarding all the components of the existing syringe after use. the

The above descriptions are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model. Anyone in the field Skilled persons, within the scope of the technical solution of the utility model, should be able to use the technical content disclosed above to make some changes or modify equivalent embodiments with equivalent changes. The technical essence of the utility model makes any simple modifications, equivalent changes and modifications to the above embodiments, all still belong to the scope of the technical solution of the utility model. the

Claims (10)

1. A syringe, characterized in that it comprises: A combined syringe body, which includes an accommodating sleeve and an operating sleeve, the accommodating sleeve and the operating sleeve are hollow bodies that pass through the axial direction, and the accommodating sleeve includes a needle connection end and One joint end is located at the two axial ends of the accommodating sleeve respectively. The operation sleeve includes a set of joint ends which can be detachably assembled to the joint end of the accommodating sleeve. ; A medicament container, which is replaceably installed in the combined syringe body, the medicament container includes a hollow container body, a closed end cap and a piston, and the closed end cap is fixedly connected to a hole formed by one end of the container body. At the opening, the piston is airtightly and axially movable assembled inside the opening formed at the other end of the container body, and the end of the container body with the closed end cap of the medicament container is located in the needle connection end of the accommodating sleeve ; An injection push rod, which includes a rod body and an operating part arranged at one end of the rod body. The rod body is axially movable and installed in the combined syringe body and can be connected to the piston of the medicament container. The operating part is located at the operating part of the combined syringe. The outside of the sleeve is connected to the rod body; A needle, which includes a socket part and a needle body with a needle hole inside, the needle body is fixed through the socket part, and the needle head is socketed and fixed on the needle connection end of the combined syringe body with its socket part, allowing the needle body to extend into the interior of the medicament container through the closed end cap; and A protective cover is detachably sleeved on the outside of the housing sleeve of the needle and the combined syringe body. the 2. The syringe according to claim 1, wherein the joint end of the accommodating sleeve is formed with an annular flange and a plurality of hooks arranged at intervals at the side ends of the annular flange; The operation sleeve has an extension tube at the other end of the assembly end, and a partition with a middle hole is formed inside the operation sleeve between the assembly end and the extension tube, so that the inside of the operation sleeve The space is divided into an assembly space located in the assembly end and an activity space located in the extension pipe part. The outer peripheral surface of the assembly end forms an outwardly protruding fin part. The assembly space of the operation sleeve is in the assembly space. An assembly opening is formed at the outer end of the connecting end, and a clamping flange is formed adjacent to the assembly opening in the movable space of the assembly end, and a plurality of pressing flanges are formed on the outer peripheral wall of the assembly end adjacent to the extension pipe. The shrapnel and the notch located around the pressing shrapnel and connected to the activity space, the end of the pressing shrapnel adjacent to the clamping flange is a free end, and the other end of the pressing shrapnel is connected to the extension pipe. the 3. The syringe according to claim 2, wherein the joint end of the accommodating sleeve is formed with a plurality of alignment protrusions at the side end of the annular flange, and the plurality of alignment protrusions are connected to the plurality of alignment protrusions. The hooks are arranged in a staggered manner; The assembly end of the operation sleeve is further formed with a plurality of alignment recesses corresponding to the alignment protrusions at its assembly port, and through the concave-convex cooperation between the alignment protrusions and the alignment recesses, the accommodating sleeve The engaging end is assembled with the assembling end of the operating sleeve. the 4. The syringe according to claim 2, characterized in that, in the operating sleeve, the partition portion is formed with a shaft tube portion axially extending into the movable space at the periphery of the middle hole, and the shaft tube portion The part provides an injection push rod to pass through it. the 5. The syringe according to claim 3, characterized in that, in the operating sleeve, the partition portion is formed with a shaft tube portion axially extending into the movable space at the periphery of the middle hole, and the shaft tube portion The part provides an injection push rod to pass through it. the 6. The syringe according to any one of claims 1 to 5, wherein the closed end cap includes a rubber closed cover and an outer cover, and the closed cover is installed on the container body At the opening at one end, the outer cover covers the outer side of the closing cover and seals the closing cover at the opening at one end of the container body. A hole is formed in the outer cover so that the closing cover corresponds to the middle area of the opening at one end of the container body segment is exposed. the 7. The syringe according to any one of claims 2 to 5, wherein the rod body of the injection push rod includes a rod end and a rod connecting portion and are located at both axial ends of the rod body; The injection push rod also includes a sliding sleeve. The sliding sleeve includes a sleeve body and a fixed part formed at one end of the sleeve body. The sleeve body can movably extend into the activity space of the extension tube part of the operation sleeve Located outside the shaft tube part, the fixed connection part is assembled with the rod connection part of the rod body and the operating part. A plurality of guide grooves are formed on the outer peripheral surface of the sleeve, and each of the guide grooves includes a straight groove part extending axially and An obliquely extending chute portion, the plurality of guide grooves are distributed on the outer peripheral surface of the end surface of the sleeve body away from the fixed portion, and one end of the chute portion of each guide groove adjacent to the fixed portion is connected to its straight groove portion adjacent to the fixed portion One end of the part, the end of the chute part away from the fixed part is connected to the end of the straight groove part of the side-adjacent guide groove away from the fixed part, so that every two adjacent guide grooves are connected in series; A plurality of guiding protrusions are formed on the peripheral wall of the movable space of the extending tube portion of the operating sleeve, and each guiding protrusion is placed into an equivalent position in the corresponding guide groove. the 8. The syringe according to claim 7, characterized in that, in the injection push rod, an annular baffle with an inner hole is formed inside the sliding sleeve, and a ring extending from the edge of the inner hole toward the end of the fixed part is formed. The connection part, the connection space is formed between the connection part and the inner wall of the fixed part, the peripheral wall of the connection part is distributed with a plurality of slits extending axially from the end, and the fixed part of the sliding sleeve is formed adjacent to the annular baffle. There are a plurality of clamping holes connecting the assembly space, a radially protruding ring flange is formed on the rod connecting part of the rod body, a flange is formed at the end of the rod connecting part, the rod body extends into the sliding sleeve, and the rod connecting part of the rod body The ring flange abuts against the side end of the annular baffle, and the flange abuts against the end of the connection part. The operating part includes a knob part and a shaft formed inside the knob part. There are a plurality of fixed hooks formed at the end of the sleeve tube, and the operating part is sleeved on the outside of the fixed part of the sliding sleeve with its knob part, and the sleeve tube extends into the fixed part. The plurality of fixed hooks are respectively buckled in the fastening holes of the fastening part of the sliding sleeve, so that the operating part, the sliding sleeve and the rod body are fixedly connected together. the 9 . The syringe according to claim 8 , wherein a concave-convex anti-slip portion is formed on the outer peripheral surface of the knob portion of the operating member. 10 . the 10. The syringe according to claim 9, wherein the closed end cap comprises a rubber closed cover and an outer cover, the closed cover is installed at an opening at one end of the container body, and the outer cover is The cover covers the outer side of the closing cover and seals the closing cover on the opening at one end of the container body. A hole is formed in the outer cover so that the middle section of the closing cover corresponding to the opening of the container body is exposed outside. the

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