CN212466751U - Injection device - Google Patents

Abstract

The utility model discloses an injection device, which comprises a first tube body, a second tube body and a third tube body which are coaxially sleeved; the inner walls of the first tube body, the second tube body and the third tube body are sequentially communicated to form a positioning cavity for embedding and axially positioning the pre-filled and sealed injector; the tail end of the positioning cavity is provided with a push rod which is connected in a sliding manner along the axial direction; the push rod is used for abutting against and pushing the piston of the pre-encapsulation injector to move; the first tube body is connected to the first end of the second tube body in a sliding mode and used for adjusting the extending length of a needle head of the prefilled syringe; the third tube body is slidably connected to the second end of the second tube body and used for adjusting the axial displacement of the push rod relative to the piston. The relative sliding of the first tube body and the second tube body can adjust the elongation of a needle head of the pre-filled and sealed injector, and the relative sliding of the second tube body and the third tube body can adjust the movement range of the push rod relative to the pre-filled and sealed injector, so that the adjustment of the injection depth and the injection amount is realized; the injection device has the advantages of simple structure, few parts and greatly reduced fault risk.

Description

Injection device

Technical Field

The utility model relates to the field of medical supplies, especially, relate to an injection device.

Background

The pre-filled syringe is an advanced liquid medicine packaging mode, and medicines are quantitatively filled in the pre-filled syringe in advance and can be directly taken and used for injection clinically. The injection device is a matched medical apparatus used for pre-filling and sealing the injector.

In order to avoid that a non-professional user, such as a diabetic patient, cannot grasp the injection depth when injecting insulin by himself through the pre-filled syringe, the injection device on the market at present can adjust the injection dose and the injection depth. However, the disadvantages of the prior art still have the following problems.

Firstly, the structure is complex and the failure rate is high. At present, the total number of parts of the injection device on the market is up to 24, and the structure is very complex. The risk of failure of any one part during use is borne by the patient.

And secondly, the number of parts is large, the manufacturing cost is high, and the economic burden of a patient is large.

Thirdly, the function coverage is not comprehensive. The injection devices provided by the prior art are mostly single in function and only can realize the adjustment of the injection depth or the injection amount.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an injection device to the regulation of injection depth and injection volume has been realized to simple, reliable structure.

In order to achieve the above object, the present invention provides an injection device, comprising a first tube, a second tube and a third tube coaxially sleeved; the inner walls of the first tube body, the second tube body and the third tube body are sequentially communicated and form a positioning cavity for embedding and axially positioning the pre-filled and sealed injector; the tail end of the positioning cavity is provided with a push rod which is connected in a sliding mode along the axial direction; the push rod is used for abutting against and pushing a piston of the pre-filling and sealing injector to move;

the first tube body is connected to the first end of the second tube body in a sliding mode and used for adjusting the extending length of a needle head of the prefilled syringe; the third pipe body is connected to the second end of the second pipe body in a sliding mode and used for adjusting the axial displacement of the push rod relative to the piston.

Preferably, one of the first tube and the second tube is provided with a first sliding block, and the other one of the first tube and the second tube is provided with a plurality of stages of first positioning sliding chutes which are distributed along the axial direction and used for allowing the first sliding block to slide so as to realize quantitative adjustment of the extending length of the needle head;

and one of the third pipe body and the second pipe body is provided with a second sliding block, and the other one of the third pipe body and the second pipe body is provided with a plurality of second positioning sliding grooves which are distributed along the axial direction and used for allowing the second sliding block to slide so as to realize quantitative adjustment of the relative displacement of the push rod and the piston.

Preferably, the second pipe body comprises a container and a batcher both having a tubular shape; a stop table for axially positioning a tail flange of the pre-filling and sealing syringe is arranged in the storage device; the quantitative device is used for pressing the tail flange towards the stopping table after the pre-filling and sealing syringe is inserted into the storage device.

Preferably, the contact surfaces of the container and the doser are threadedly connected.

Preferably, the first sliding blocks are arranged on the inner wall of the storage device, and all the first positioning sliding chutes comprise a first main sliding track which is arranged on the periphery of the first pipe body and extends directly along the axial direction and a plurality of first branch sliding tracks which are communicated with the first main sliding track and extend directly along the radial direction;

the second sliding block is arranged on the inner wall of the third pipe body, and all the second positioning sliding grooves are arranged on the periphery of the batcher; the structure of all the second positioning sliding grooves is the same as that of all the first positioning sliding grooves.

Preferably, a transparent observation window is arranged on the periphery of the first tube.

Preferably, the radial dimension of the axial middle part of the push rod is larger than the radial dimensions of the axial two ends; the tail end of the positioning cavity is provided with a limiting hole; the radial dimension of the limiting hole is larger than the radial dimensions of the two ends of the push rod and smaller than the radial dimension of the axial middle part of the push rod.

Preferably, a pressing handle is detachably connected to a distal end of the push rod.

Preferably, the first tube, the second tube, the third tube and the push rod are all injection-molded parts.

Preferably, one end of the first pipe body, which is far away from the second pipe body, is coaxially sleeved with a cap remover; the inner wall of the cap remover is provided with a cap removing barb for hooking and pulling a protective cap of the prefilled syringe.

Compared with the prior art, the utility model provides an injection device includes first body, second body and the third body that push rod, coaxial cup jointed.

Wherein, the inner walls of the first tube body, the second tube body and the third tube body are sequentially communicated and form a positioning cavity for embedding the pre-filled and sealed injector and axially positioning, and the push rod is connected to the tail end of the positioning cavity in an axial sliding manner along the positioning cavity. When the pre-encapsulation injector is inserted and axially positioned in the positioning cavity, the push rod inserted into the positioning cavity is pressed against the outer surface of the piston of the pre-encapsulation injector, and a user can push the piston of the pre-encapsulation injector to move by pressing the push rod.

In the injection device, the first tube body is connected to the first end of the second tube body in a sliding mode, the exposure and the retraction of the needle head of the pre-filled and sealed injector can be achieved by stretching and compressing the sleeve joint length of the first tube body and the second tube body, in other words, the larger the total length of the first tube body and the second tube body is, the most of the needle head of the pre-filled and sealed injector is shielded by the first tube body, and the shallower the depth of the needle; conversely, the needle can be inserted into the body to a greater depth.

In the injection device, the third tube body is connected to the second end of the second tube body in a sliding mode, the axial displacement of the push rod, relative to the piston, is adjustable through the stretching rope and the sleeve joint length of the compressed third tube body and the second tube body, and then the injection quantity of the pre-filling and sealing injector is adjusted.

The utility model provides an injection apparatus utilizes first body, second body and third body to assemble jointly and to supply embedment syringe to insert and axial positioning's location chamber in advance, combines the piston removal of push rod promotion embedment syringe in advance, realizes the injection of medicament in the embedment syringe in advance. The injection device can realize quantitative adjustment of injection depth and injection dosage, is simple and reliable to operate, and is convenient for users to automatically realize quantitative and fixed-depth injection of medicaments.

Furthermore, the utility model provides an injection device simple structure, spare part figure are few, do not have the spring, have avoided the spring constant speed automatic dosing brought can't suspend and dose drawbacks such as too fast, greatly reduced the trouble risk.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a pre-filled syringe of the prior art;

fig. 2 is a schematic view of an injection device according to an embodiment of the present invention in a first assembled position;

fig. 3 is a schematic view of an injection device according to an embodiment of the present invention in a second assembled position;

fig. 4 is an assembly diagram of an injection device and a pre-filled syringe in a first state according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4;

fig. 6 is an assembly diagram of the injection device and the pre-filled and sealed syringe in a second state according to the embodiment of the present invention;

fig. 7 is an assembly diagram of the injection device and the pre-filled and sealed syringe in a third state according to the embodiment of the present invention;

fig. 8 is a schematic structural view of a storage device according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8;

fig. 10 is a schematic structural diagram of a quantitative device provided in an embodiment of the present invention;

FIG. 11 is a cross-sectional view of FIG. 10;

fig. 12 is a schematic structural view of a cap remover according to an embodiment of the present invention;

FIG. 13 is a cross-sectional view of FIG. 12;

fig. 14 is a schematic structural view of a first tube according to an embodiment of the present invention;

FIG. 15 is a cross-sectional view of FIG. 14;

fig. 16 is a schematic structural view of a second tube according to an embodiment of the present invention;

FIG. 17 is a cross-sectional view of FIG. 16;

fig. 18 is a schematic structural view of a pressing handle according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of a push rod according to an embodiment of the present invention.

The device comprises a 01-prefilled syringe, a 011-piston, a 012-tail flange, a 013-protective cap, a 014-needle, a 1-uncapping device, a 11-uncapping barb, a 2-first tube, a 21-first main slideway, a 22-first branch slideway, a 23-observation window, a 3-storage device, a 31-stop table, a 32-first sliding block, a 4-batcher, a 41-second main slideway, a 42-second branch slideway, a 43-push rod stop surface, a 5-third tube, a 51-second sliding block, a 52-limit hole, a 6-push rod and a 7-pressing handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 19, fig. 1 is a schematic structural diagram of a pre-filled syringe in the prior art; fig. 2 is a schematic view of an injection device according to an embodiment of the present invention in a first assembled position; fig. 3 is a schematic view of an injection device according to an embodiment of the present invention in a second assembled position; fig. 4 is an assembly diagram of an injection device and a pre-filled syringe in a first state according to an embodiment of the present invention; FIG. 5 is an enlarged view of a portion of FIG. 4; fig. 6 is an assembly diagram of the injection device and the pre-filled and sealed syringe in a second state according to the embodiment of the present invention; (ii) a Fig. 7 is an assembly diagram of the injection device and the pre-filled and sealed syringe in a third state according to the embodiment of the present invention; fig. 8 is a schematic structural view of a storage device according to an embodiment of the present invention; FIG. 9 is a cross-sectional view of FIG. 8; fig. 10 is a schematic structural diagram of a quantitative device provided in an embodiment of the present invention; FIG. 11 is a cross-sectional view of FIG. 10; fig. 12 is a schematic structural view of a cap remover according to an embodiment of the present invention; FIG. 13 is a cross-sectional view of FIG. 12; fig. 14 is a schematic structural view of a first tube according to an embodiment of the present invention; FIG. 15 is a cross-sectional view of FIG. 14; fig. 16 is a schematic structural view of a second tube according to an embodiment of the present invention; FIG. 17 is a cross-sectional view of FIG. 16; fig. 18 is a schematic structural view of a pressing handle according to an embodiment of the present invention; fig. 19 is a schematic structural diagram of a push rod according to an embodiment of the present invention.

The utility model provides an injection device, including coaxial first body 2, second body and the third body 5 that cup joints.

In this injection device, the inner wall of the first body 2, the second body and the 5 three of third body that the coaxial cup jointed communicates in proper order and forms the location chamber, and the location chamber can supply to embedment 01 embedding of syringe and realize axial positioning in advance. The tail end of the positioning cavity is provided with a push rod 6 which is connected in a sliding mode along the axial direction, and the push rod 6 is used for abutting against and pushing the piston 011 of the pre-encapsulation injector 01 to move.

Wherein, embedment syringe 01 is the disposable product that has the medicament in advance, the utility model provides an injection apparatus is equivalent to embedment syringe 01's casing in advance. Thus, the specific shape and size of the positioning cavity formed by the first, second and third tubes 2, 5 depends on the shape and size of the pre-filled syringe 01.

When the injection device is used, the injection device is sleeved on the periphery of the pre-filled and sealed injector 01. Since the pre-filled syringe 01 is positioned in the positioning cavity of the injection device, when the push rod 6 of the injection device is pushed, the push rod 6 pushes the piston 011 of the pre-filled syringe 01 to move, so that the pre-filled syringe 01 outputs the medicament from the needle 014 thereof.

The positioning cavity of the injection device can be provided with a positioning convex column or a flange and other structures which protrude inwards in the radial direction, so that the axial positioning of the pre-filled syringe 01 in the positioning cavity is realized, and the pre-filled syringe 01 is prevented from moving synchronously along with the push rod 6 when the push rod 6 pushes the piston 011 of the pre-filled syringe 01.

The first tube 2 of the injection device is slidably connected to the first end of the second tube, and the extension length of the needle 014 of the pre-filled and sealed syringe 01 can be adjusted by relative sliding between the first tube 2 and the second tube. For example, the pre-filled syringe 01 and the second tube remain relatively stationary, the needle 014 of the pre-filled syringe 01 extends out to the end connected with the first tube 2, and when the first tube 2 is pulled along the second tube to slide outwards, the total axial length of the first tube 2 and the second tube increases, and the first tube 2 covers most of the needle 014 of the pre-filled syringe 01 inside, which means that the needle 014 of the pre-filled syringe 01 is retracted inwards at this time, and the user can only prick the needle 014 of the pre-filled syringe 01 into the human body at a shallow depth. On the contrary, when the first tube 2 is pushed to slide inwards along the second tube, the total axial length of the first tube 2 and the second tube is shortened, and the first tube 2 exposes most of the needle 014 of the prefilled syringe 01 to the outside, which means that the needle 014 of the prefilled syringe 01 extends outwards at this time, so that the user can prick the needle 014 of the prefilled syringe 01 into the human body with a greater depth.

Similarly, the third tube 5 is slidably connected to the second end of the second tube, and the axial displacement of the push rod 6 relative to the piston 011 can be adjusted by relative sliding movement of the third tube 5 and the second tube. Since the prefilled syringe 01 is stationary with respect to the second tube, when the third tube 5 is pulled out along the second tube, the distance between the tail of the third tube 5 and the prefilled syringe 01 increases, and the pushing range of the push rod 6 is restricted by the tail of the third tube 5, that is, the longer the distance the third tube 5 is pulled out of the second tube, the shorter the distance the push rod 6 is pushed into the prefilled syringe 01 becomes, which means that the amount of the medicine injected into the human body by the user using the push rod 6 becomes smaller. Conversely, the larger the distance that the third tube 5 is pushed into the second tube, the longer the distance that the push rod 6 is pushed into the prefilled syringe 01, which means that the more the amount of the medicine that the user injects into the human body using the push rod 6.

It can be seen that, the utility model provides an injection apparatus utilizes first body 2, second body and third body 5 to assemble jointly and to supply embedment syringe 01 to insert and axial positioning's location chamber in advance, combines push rod 6 to promote the piston 011 of embedment syringe 01 in advance and removes, realizes the injection of medicament in the embedment syringe 01 in advance. Meanwhile, the relative sliding of the first tube 2 and the second tube can realize the extending amount of the needle 014 of the pre-filled and sealed syringe 01, so that a user can adjust the depth of the needle 014 of the pre-filled and sealed syringe 01 penetrating into the human body by himself/herself; the relative sliding of the second tube body and the third tube body 5 can realize the moving range of the push rod 6 relative to the piston 011 of the pre-filled syringe 01, so that a user can conveniently adjust the dose of the medicament injected into a human body by the pre-filled syringe 01. The injection device is convenient to operate, has comprehensive functions, and is beneficial to a user to automatically inject the medicament in a fixed quantity and fixed depth.

In conclusion, the injection device provided by the utility model has simple structure, less number of parts and no spring, avoids the defects of incapability of stopping, too fast administration and the like caused by the automatic administration at constant speed of the spring, and greatly reduces the fault risk; the quantitative adjustment of the injection depth and the injection dosage can be realized, and the device is simple to operate, safe and reliable.

The injection device provided by the present invention will be further described with reference to the accompanying drawings and embodiments.

On the basis of above-mentioned embodiment, in order to realize better technological effect, the utility model provides an among the injection apparatus, in first body 2 and the second body two, one is equipped with first sliding block 32, and another is equipped with multistage first positioning chute along axial distribution. Wherein, first positioning chute is used for restricting the sliding position of first sliding block 32, and then realizes quantitative adjustment prefilled syringe 01's syringe needle 014's the length that stretches out.

The first positioning chutes are divided into multiple stages and are distributed along the axial direction of the first tube 2 and the second tube, so that when the first sliding block 32 slides from one of the first positioning chutes to the other first positioning chute, the needle 014 of the pre-filled syringe 01 extends outward or retracts inward by the length of the axial distance between the two first positioning chutes. It can be seen that, when a user injects a medicine by using the injection device, the position of the first sliding block 32 in the multi-stage first positioning sliding groove can be adjusted according to the required injection depth, so that the relative position relationship between the first tube 2 and the second tube can be adjusted quantitatively.

As for the multi-stage first positioning chutes, the first positioning chutes can be arranged at equal intervals, so that a user can calculate the extending length of the needle 014 of the pre-filled and sealed syringe 01 according to the sliding stages of the first sliding block 32 between the first positioning chutes; alternatively, the pre-filled and sealed syringe 01 and the syringe 01 may be distributed at different intervals, and in any one of the first positioning chutes, scales are provided for a user to identify the extending length of the needle 014 of the pre-filled and sealed syringe 01 corresponding to the current first positioning chute.

In this embodiment, one of the third tube 5 and the second tube is provided with a second sliding block 51, and the other is provided with a plurality of axially distributed second positioning sliding grooves for sliding the second sliding block 51 to realize the quantitative adjustment of the relative displacement of the push rod 6 and the piston 011. For the structures of the second sliding block 51 and the multiple stages of second positioning sliding slots, reference may be made to the arrangement of the first sliding block 32 and the multiple stages of second positioning sliding slots, which is not described herein again.

In order to facilitate the operation, the utility model provides an in the injection device, the second body is including all being tubulose and the storage ware 3 and the ration ware 4 that cup joint each other. Since the storage container 3 and the measure container 4 are coupled to each other, the storage container 3 and the measure container 4 are slidably coupled to the first pipe 2 and the third pipe 5, respectively.

When the pre-filled and sealed injector 01 is installed by using the injection device, the pre-filled and sealed injector 01 can be axially positioned between the end contact surfaces of the storage device 3 and the positioner. For example, a stop table 31 for axially positioning the tail flange 012 of the pre-filled syringe 01 is arranged in the storage device 3; the doser 4 is used to press the rear flange 012 toward the stop table 31 after the prefilled syringe 01 is inserted into the container 3. In brief, when the prefilled syringe 01 is inserted into the storage container 3, the tail flange 012 of the prefilled syringe 01 stops moving at the stop table 31 of the storage container 3, and then the quantitative container 4 is inserted into the storage container 3, so that the end of the positioner presses the tail flange 012 of the prefilled syringe 01 against the stop table 31, and finally the tail flange 012 of the prefilled syringe 01 is clamped between the stop table 31 and the end of the positioner.

Wherein, in order to ensure the structural connection strength of the second pipe body, the container 3 and the doser 4 of the second pipe body are fixedly connected through threads. Referring to fig. 8 to 11, the inner wall of one end of the container 3 is provided with an internal thread, the outer wall of one end of the locator is provided with an external thread, the prefilled syringe 01 is inserted into the container 3 while the container 3 and the location amount are separated from each other, and then the doser 4 is inserted into and fixedly coupled to the container 3 by a thread.

On the basis of the above embodiment, the utility model provides an among the injection apparatus, first sliding block 32 sets up in the inner wall of storage ware 3, and whole first positioning chute is including setting up in the periphery of first body 2 and along the first main slide 21 and the first branch slide 22 that the multichannel communicates in first main slide 21 and radial diameter directly extend of axial diameter directly. Similarly, the second slide block 51 is disposed on the inner wall of the third pipe 5, and all the second positioning chutes are disposed on the outer periphery of the scale 4; the structure of all the second positioning sliding grooves is the same as that of all the first positioning sliding grooves.

In the above example, the first slide block 32 is disposed on the storage device 3, and the multi-stage first positioning slide grooves are disposed on the first tube 2; the second slide block 51 is disposed on the third tube 5, and the multi-stage second positioning sliding grooves are disposed on the quantitative device 4.

The first slide block 32 and the multi-stage first positioning slide groove are explained in detail below as an example. In the multistage first positioning sliding groove, the first main sliding rail 21 connects the plurality of first branch sliding rails 22, and the first sliding block 32 can axially move along the first main sliding rail and further slide into each first branch sliding rail 22, so that the first sliding block 32 is axially positioned. Obviously, the size of the channel of the first main slide is not smaller than the size of the first sliding block 32, and the size of the channel of each first branch slide 22 should be matched with the size of the first sliding block 32, so as to ensure that the first sliding block 32 sliding into the first branch slide 22 achieves the locking positioning, and the position of the needle 014 of the pre-filled syringe 01 relative to the injection device is not influenced by the mutual deflection movement of the two. Accordingly, the multi-stage second positioning chute may include a second main chute 41 and a plurality of second branch chutes 42.

In addition, a transparent observation window 23 is provided on the periphery of the first tube 2. The user can distinguish the stretching and pushing of the first tube 2 and the container 3 through the observation window 23, and the position of the prefilled syringe 01 relative to the first tube 2 is advantageous for the user to precisely adjust the protruding length of the needle 014 of the prefilled syringe 01.

To the utility model discloses the push rod 6 that adopts, the radial dimension at its axial middle part is greater than the radial dimension at axial both ends, in other words, the middle part of push rod 6 is thick, both ends are thin. Correspondingly, the end of the positioning cavity is provided with a limiting hole 52, and the radial dimension of the limiting hole 52 is larger than the radial dimension of the two ends of the push rod 6 and smaller than the radial dimension of the axial middle part of the push rod 6, which means that the two ends of the push rod 6 can extend into or out of the limiting hole 52, and the middle part of the push rod 6 can not pass through the limiting hole 52. Therefore, the injection device with the push rod 6 and the positioning cavity can restrict the sliding range of the push rod 6 in the positioning cavity, and avoid the push rod 6 from being separated from the positioning cavity due to accidental actions when a user holds the injection device.

In addition, the inner wall of the second tube may further be provided with a push rod stop surface 43 for restricting the sliding distance of the push rod 6 towards the first tube 2 so as to limit the maximum injection amount of the pre-filled syringe 01 formed by the injection device. For the second tube having the container 3 and the container 4, the push rod stop surface 43 may be provided on the inner wall of the container 4.

Further, a pressing handle 7 is detachably attached to the tip of the push rod 6. The push handle 7 is used for being pressed by a thumb of a user, so that the user can apply a pushing force to the push rod 6 to push the piston 011 of the pre-filled syringe 01 to move. According to the foregoing embodiment, the middle portion of the push rod 6 cannot pass through the position limiting hole 52 of the positioning cavity, and therefore, in this embodiment, the push rod 6 and the pressing handle 7 are detachably connected. When the push rod 6 is installed in the positioning cavity, the push rod 6 and the pressing handle 7 are separated from each other, so that the push rod 6 can be inserted inwards from the head of the third tube 5, and is fixedly connected with the pressing handle 7 after penetrating out from the limiting hole 52 at the tail of the third tube 5.

The surface of the pressing handle 7 can be provided with anti-skidding textures, so that the phenomenon of skidding when a user presses the push rod 6 is avoided.

In order to improve the safety and sanitary performance of the injection operation, the utility model provides an injection device, wherein, the first tube body 2, the second tube body, the third tube body 5 and the push rod 6 are injection molding parts, for example, medical resin materials which are commonly used in the medical industry are adopted. Thus, the injection device is single in material, low in cost, waste after use, free of complex classification, scientific and sanitary, and particularly the injection device adopting the medical-grade resin material can greatly simplify recycling and disposal.

The utility model provides an injection device still is equipped with uncapping device 1, and the one end that the second body was kept away from to first body 2 is located to uncapping device 1 coaxial sleeve. In this embodiment, the inner wall of the cap remover 1 is provided with a cap removing barb 11 to hook the cap 013 of the pre-filled syringe 01, so that, when the pre-filled syringe 01 is axially inserted and positioned in the positioning cavity of the injection device, the cap 013 of the pre-filled syringe 01 is fixedly connected to the cap remover 1 through the cap removing barb 11, and the user can detach the cap 013 of the pre-filled syringe 01 by pulling the cap remover 1. In other words, when the pre-filled syringe 01 is assembled in the positioning chamber of the injection device, the cap 013 of the pre-filled syringe 01 is always kept around the needle 014, which can ensure the safety of the user.

For the second tube body formed by the container 3 and the quantitative means 4, the cap remover 1 can accurately and rapidly separate the main body part of the prefilled syringe 01 and the cap 013 thereof in combination with the container 3 and the quantitative means 4. The specific operation is as follows:

after the uncapping device 1 and the first tube 2 are connected to the storage device 3, the prefilled syringe 01 is inserted into the storage device 3, the doser 4 is inserted into the storage device 3, and the rear flange 012 of the prefilled syringe 01 is pressed against the stopper 31 of the storage device 3 by rotating the doser 4. In this process, upon hearing the "click" meaning that the cap 013 of the pre-filled syringe 01 is pressed into the middle cap barb 11 of the cap remover 1, the relative fixation of the cap 013 and the cap remover 1 is achieved. Then, the cap 013 of the pre-filled syringe 01 is removed and retained in the cap remover 1 by rotating the cap remover 1. Subsequently, the extension length of the needle 014 of the pre-filled syringe 01 and the single injection amount can be adjusted by rotating and drawing the first tube 2 and the container 3, the third tube 5 and the doser 4, respectively, to realize the multi-point quantitative fixed-depth injection.

The utility model provides an injection apparatus simple structure, economical and practical, safe effective, the fault rate is low, and the function is comprehensive, and first body 2 and store up ware 3, third body 5 and the slide rail formula structure between the dosage 4 have realized through rotatory and pull regulation syringe 01's syringe needle 014 extension length and injection volume in advance, provide a safe, effective and convenient clinical operation scheme for the application in fields such as cosmetic, bacterin, insulin injection of embedment syringe 01 in advance.

The injection device provided by the present invention has been described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. An injection device is characterized by comprising a first tube body (2), a second tube body and a third tube body (5) which are coaxially sleeved; the inner walls of the first tube body (2), the second tube body and the third tube body (5) are sequentially communicated to form a positioning cavity for embedding and axially positioning a pre-filled syringe (01); the tail end of the positioning cavity is provided with a push rod (6) which is connected in a sliding mode along the axial direction; the push rod (6) is used for abutting against and pushing a piston (011) of the pre-encapsulation injector (01) to move;

the first tube body (2) is connected to the first end of the second tube body in a sliding mode and used for adjusting the extending length of a needle head of the pre-filling and sealing syringe (01); the third tube (5) is slidably connected to the second end of the second tube for adjusting the axial displacement of the push rod (6) relative to the piston (011).

2. The injection device of claim 1,

one of the first tube body (2) and the second tube body is provided with a first sliding block (32), and the other one of the first tube body and the second tube body is provided with a plurality of stages of first positioning sliding chutes which are distributed along the axial direction and used for enabling the first sliding block (32) to slide so as to realize quantitative adjustment of the extending length of the needle head;

one of the third pipe body (5) and the second pipe body is provided with a second sliding block (51), and the other one of the third pipe body and the second pipe body is provided with a plurality of second positioning sliding grooves which are distributed along the axial direction and used for allowing the second sliding block (51) to slide so as to realize quantitative adjustment of the relative displacement of the push rod (6) and the piston (011).

3. An injection device according to claim 2, characterized in that said second body comprises a reservoir (3) and a doser (4) both tubular; a stop table (31) for axially positioning a tail flange (012) of the pre-filling and sealing syringe (01) is arranged in the storage device (3); the dosing device (4) is used for pressing the tail flange (012) towards the stop table (31) after the pre-filling and sealing syringe (01) is inserted into the storage device (3).

4. An injection device according to claim 3, characterized in that the contact surfaces of the reservoir (3) and the doser (4) are screw-connected.

5. The injection device of claim 3,

the first sliding blocks (32) are arranged on the inner wall of the storage device (3), and all the first positioning sliding chutes comprise first main sliding ways (21) which are arranged on the periphery of the first pipe body (2) and extend radially along the axial direction and a plurality of first branch sliding ways (22) which are communicated with the first main sliding ways (21) and extend radially and directly;

the second sliding block (51) is arranged on the inner wall of the third pipe body (5), and all the second positioning sliding grooves are arranged on the periphery of the batcher (4); the structure of all the second positioning sliding grooves is the same as that of all the first positioning sliding grooves.

6. An injection device according to claim 1, characterized in that the first tube (2) is provided with a transparent viewing window (23) on its peripheral side.

7. An injection device according to claim 1, characterized in that the radial dimension of the axial middle part of the push rod (6) is greater than the radial dimensions of the axial ends; the tail end of the positioning cavity is provided with a limiting hole (52); the radial dimension of the limiting hole (52) is larger than the radial dimensions of the two ends of the push rod (6) and smaller than the radial dimension of the axial middle part of the push rod (6).

8. An injection device according to claim 7, characterized in that a pressing handle (7) is detachably connected to the end of the push rod (6).

9. Injection device according to claim 1, characterized in that said first tubular body (2), said second tubular body, said third tubular body (5) and said push rod (6) are all injection-molded parts.

10. An injection device according to any one of claims 1 to 9, characterized in that the end of the first body (2) remote from the second body is coaxially sleeved with a cap remover (1); the inner wall of the uncapping device (1) is provided with an uncapping barb (11) for hooking and pulling a protective cap (013) of the pre-filled syringe (01).

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