CN114247014A

CN114247014A - Syringe with a needle

Info

Publication number: CN114247014A
Application number: CN202011022142.XA
Authority: CN
Inventors: 叶进民; 吴秉翰
Original assignee: CC Biotechnology Corp
Current assignee: CC Biotechnology Corp
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2022-03-29
Also published as: CN115445030A

Abstract

The invention relates to an injector, which comprises a medicament container for containing medicament liquid, an injection module and a driving mechanism, wherein the injection module comprises a switching mechanism and a needle outlet mechanism which are connected, the switching mechanism is connected with the medicament container, a driving piston group in the switching mechanism is connected with the driving mechanism and can be driven by the driving mechanism, when in injection, a needle group in the needle outlet mechanism can be utilized to pierce a human body, the driving piston group in the driving mechanism drives the driving piston group of the switching mechanism to convey the medicament liquid in the medicament container to the needle group to execute the medicament liquid injection, and the medicament container and the injection module which relate to safety and sanitation in the injector adopt a disposable use mode, are disassembled and discarded after being used, and are externally connected with the driving mechanism by utilizing the combined structure of the switching mechanism, so that the driving mechanism can not contact with the injected medicament liquid completely in the medicament liquid injection process, and the driving mechanism can be reused repeatedly, unnecessary material waste of the syringe is reduced.

Description

Syringe with a needle

Technical Field

The invention relates to an injector applied to the purpose of hypodermic injection of a medicament liquid of a human body.

Background

At present, the structure of the injector for injecting medicament liquid into human body subcutaneously mainly uses an injection module which can be manually or electrically operated to be connected with a medicament container, so that the injection module can be used for injecting the needle group of the injection module into the human body to carry out subcutaneous injection.

The existing syringe is based on the safety standard of medicament liquid injection, although part of the existing syringes have the function of repeated use for a limited number of times. However, when the number of times of use of the existing syringe is reached, the syringe needs to be discarded in the whole group, and the syringe cannot be reused. Moreover, the existing injector adopts a fixed combination structure, the driving mechanism of the existing injector is directly connected with the injection module and can contact the injection medicament, and the existing injector is difficult to reuse part of the mechanism based on the safety and sanitation principle.

In addition, the existing injector can be convenient for hypodermic injection for multiple times, and can avoid uncomfortable feeling of a human body caused by multiple times of inserting and pulling of a needle head, even if the injector uses a needle group comprising a soft needle and a hard needle, when the needle group is inserted into the subcutaneous part of the human body, the soft needle is hard to directly insert into the human body due to the soft quality of the soft needle, so that the hypodermic part of the human body is inserted with the form of the hard needle penetrating in the soft needle firstly, then the hard needle is pulled out of the soft needle, and then the injection module and the medicament container are connected with the soft needle for injection, and meanwhile, the soft needle can be left in the subcutaneous part of the human body for a long time so as to be injected for multiple times. However, in the injection module, since the needle set combining the soft needle and the hard needle is used, the user must discharge the needle in two steps, which is inconvenient for the user to operate during the use process.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a syringe, solves current fixed syringe and uses the back, and the material that needs whole group syringe to abandon is extravagant problem based on safety and sanitation.

The technical solution proposed by the invention is as follows: providing a syringe, comprising:

the medicament container comprises a container body for containing medicament liquid and a container joint arranged on one side of the container body;

an injection module, comprising:

the conversion mechanism is assembled with the medicament container and comprises a conversion connecting seat and a driving piston group arranged in the conversion connecting seat, the conversion connecting seat comprises an input adapter and an output adapter, and the input adapter is connected with the container joint of the medicament container; and

the needle discharging mechanism is connected with the switching mechanism in an assembling mode and comprises a needle group, and the needle group can be communicated with the output adapter; and

the driving mechanism comprises a shell and a driving piece which is arranged in the shell and can be operated to move, the shell can be connected with the conversion connecting seat of the conversion mechanism in a disassembly and assembly mode, the driving piece is connected with the driving piston set and can drive the driving piston set to pump the medicament liquid in the medicament container to the needle outlet mechanism, and then the needle set of the needle outlet mechanism executes medicament liquid injection.

The invention has the advantages that by the invention of the integral composition structure of the injector, the injection module comprises a conversion mechanism and a needle outlet mechanism which are connected, the conversion mechanism is detachably connected with a medicament container, a driving piston group in the conversion mechanism is detachably connected with a driving mechanism, the injector can be driven by the driving mechanism to convey the medicament liquid in the medicament container to the needle set to inject the medicament liquid, and the medicament container and the injection module in the injector related to safety and sanitation are disassembled and discarded after use without repeated use by the modularized combined structure, and the driving mechanism can not contact the injected medicament liquid completely in the medicament liquid injection process by the combined structure of the switching mechanism and the external driving mechanism, the driving mechanism of the injector can be repeatedly reused, and unnecessary material waste of the injector is reduced.

The injector of the invention can further utilize the needle-out mechanism to comprise a base, a connecting part, a needle-out operation assembly and a needle retracting operation piece, wherein the base is connected with the converting connecting seat, the connecting part can be movably arranged in the base, the connecting part is connected with the output adapter of the converting mechanism, the needle assembly can be movably arranged in the connecting part, the needle assembly comprises a soft needle, a needle plug arranged at one end of the soft needle and a hard needle capable of penetrating in the soft needle, the needle-out operation assembly can be movably arranged in the base and connected with the needle assembly, the needle-out operation assembly can be operated to drive the needle assembly arranged in the connecting part to extend out of the base to be out of the needle in the form that the hard needle penetrates in the soft needle and continuously drive the hard needle to be separated from the soft needle, so that the soft needle is communicated with the output adapter of the converting mechanism through the connecting part, the needle retracting operation part can be movably arranged in the base, the needle retracting operation part can be operated to bring the connecting part and the soft needle which is arranged in the connecting part and is in a needle withdrawing state back to the base and the like, so that when the injector is used for injecting a human body, after the injector is abutted and fixed on a preset injection part of the human body, the needle withdrawing mechanism in the injection module drives the needle group in the connecting part by using the operated needle withdrawing operation component, the needle group extends out of the base in a manner of penetrating a hard needle in the soft needle and can be directly inserted into the human body, and the needle withdrawing operation component continuously drives the hard needle to be separated from the soft needle in the operation process, namely, the driving piston group of the conversion mechanism can be driven by the driving mechanism to move, so that the injection of a medicament liquid can be executed; after injection, the needle retracting operation piece is operated to drive the connecting part and the soft needle arranged in the connecting part to retract into the base together for retracting, so that the injector has excellent simplicity and convenience in the use process.

The injector of the invention can also further utilize a movable chamber in the base of the needle-out mechanism, the base is provided with a fixed buckle hook at the periphery of the movable chamber, the connecting part can be movably arranged in the movable chamber of the base, the connecting part comprises a connecting base arranged on a connecting base, the connecting base is provided with a base peripheral wall and a needle assembling part arranged in the base peripheral wall, a needle chamber is arranged in the needle assembling part, one end of the needle assembling part facing the seat plate is provided with a needle plug hole communicated with the needle chamber, the needle plug hole corresponds to the through hole of the seat plate, the connecting head passes through the base and is connected with the output adapter of the switching mechanism, and the base peripheral wall is provided with at least one cutting edge part; the soft needle of the needle group can be movably arranged in the needle chamber of the needle group installation part, and the needle plug arranged on the soft needle can be fixed in the needle plug hole in an operation way; the needle-out operation assembly includes one needle-out operation part capable of being set inside the base movably, one needle seat capable of being fastened and fixed with the fixing buckle of the base, one sealing member and one spring, the needle-out operation part includes one button part and one holding space in one side of the button part, the holding space corresponds to the movable chamber, the needle seat is set inside the holding space and connected to the needle-out operation part, the needle seat includes one needle seat head and one needle seat connecting rod, the needle seat has one connecting part capable of being cut off with the cutting edge, the needle seat is connected to the hard needle via the needle seat connecting rod and pushed to the needle plug of the needle set, the sealing member is combined with the spring and set inside the connecting part, and the sealing member is set outside the needle set and covers the needle chamber, the sealing component is tightly sleeved outside the needle seat connecting rod, the spring is sleeved outside the needle seat connecting rod, and two ends of the spring are respectively connected with the needle seat head end of the needle seat and the sealing component. The needle outlet mechanism is integrally formed, so that in one operation action of pressing the needle outlet mechanism, the needle group extends out of the base to be needle-outlet in a manner that the soft needle penetrates through the hard needle, the connecting part between the needle seat and the needle outlet operation piece is cut off by the cutting edge part of the connecting part, the elastic force of the spring pushes the needle seat, the needle seat drives the hard needle to be drawn out from the soft needle, and the soft needle is communicated with the output adapter of the switching mechanism through the needle chamber and the connector, so that the needle outlet operation is simpler, more convenient and easier.

The injector of the invention can further utilize one end of the connecting head of the connecting part of the needle outlet mechanism, which is connected with the connecting base, to form a reducing part with reduced diameter and capable of being cut off, one side of the needle outlet operating part, which corresponds to the connecting head, is provided with a cutting knife part, and the cutting knife part can be operated to cut the reducing part of the connecting head of the connecting part, so that when the top of the needle outlet operating part of the needle outlet mechanism pushes the connecting part in the base to be far away from the seat plate positioned on the back of the base, the soft needle of the needle group is simultaneously driven to be accommodated in the base, and the reducing part of the connecting head of the connecting part connecting conversion mechanism can be used for cutting off the cutting knife part of the needle outlet operating part fixed on the base, so that the injection module can not be reused, and the use safety of the injector is ensured.

The syringe can further utilize the needle discharging mechanism to be additionally provided with a safety protecting cover and a safety pin, the safety protecting cover covers the outer side of the needle discharging operation assembly and can be clamped on the base, the safety pin penetrates through the safety protecting cover and the needle discharging operation piece of the needle discharging operation assembly, and a pushing spring is arranged between the safety protecting cover and the needle discharging operation piece. Therefore, after the safety pin is pulled out and the safety protecting cover is taken down, the needle outlet mechanism can execute the needle outlet action, and the use safety is ensured. In addition, after the safety pin is pulled out, the safety protecting cover can be automatically ejected away from the base by the ejection spring, and the convenience of operation is improved.

Drawings

The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

fig. 1 is a perspective view of a preferred embodiment of the syringe of the present invention.

Fig. 2 is a partially exploded perspective view of the preferred embodiment of the syringe shown in fig. 1.

Fig. 3 is a perspective view of the medicament container of the preferred embodiment of the injector shown in fig. 1 and 2.

Fig. 4 is an assembled view of the injection module of the preferred embodiment of the injector shown in fig. 1 and 2.

Fig. 5 is an exploded perspective view of a switching mechanism in the injection module shown in fig. 1, 2 and 4.

Fig. 6 is an exploded perspective view of another viewing angle of the shift mechanism in the injection module of fig. 1, 2 and 4.

Fig. 7 is a partial side plan view of the preferred embodiment of the injector shown in fig. 1 and 2.

Fig. 8 is a schematic sectional view taken along line a-a in fig. 7.

Fig. 9 is a schematic sectional view taken along line B-B in fig. 7.

Fig. 10 is an exploded perspective view of the needle ejecting mechanism in the injection module shown in fig. 1, 2 and 4.

Fig. 11 is an exploded perspective view of the needle ejecting mechanism of the injection module shown in fig. 1, 2 and 4 from another viewing angle.

Fig. 12 is a schematic plan view of the needle ejection mechanism in the injection module shown in fig. 1, 2 and 4.

Fig. 13 is a schematic sectional view taken along line C-C in fig. 12.

Fig. 14 is a schematic sectional view taken along line D-D in fig. 12.

Fig. 15 is an exploded perspective view of the drive mechanism of the preferred embodiment of the injector shown in fig. 1 and 2.

Fig. 16 is another exploded perspective view of the drive mechanism of the preferred embodiment of the injector shown in fig. 1 and 2.

Fig. 17 is a schematic view of the operation of the preferred embodiment of the injector of fig. 1-2 in assembling medicament containers into an injection module in use.

Fig. 18 is an operational schematic view of the drive mechanism for reassembling the combination of the medicament container and the injection module of the preferred embodiment of the injector shown in fig. 1-2 in use.

Fig. 19 is a cross-sectional view of the needle ejection mechanism of the injection module of fig. 1-2 with the protective cover and safety pin removed in use of the preferred embodiment of the injector of the present invention.

Fig. 20 is an operation diagram of the needle discharging mechanism shown in fig. 19, in which the needle discharging operation assembly is pressed to drive the needle set in the connection component to extend out of the base to discharge the needle in a manner that the soft needle penetrates the hard needle.

FIG. 21 is a schematic view of the needle ejecting mechanism shown in FIG. 20, when the needle ejecting operation element is fixed in the base, the needle seat is ejected away from the needle ejecting operation element, and the hard needle is driven to disengage from the soft needle.

FIG. 22 is a schematic view of the needle withdrawing mechanism shown in FIG. 20 after the needle withdrawing mechanism has completed an injection, and the needle retracting mechanism is operated to retract the soft needle by the needle retracting operation device.

FIG. 23 is a schematic view (I) showing the needle withdrawing mechanism shown in FIG. 21, which is operated to cut off the reduced diameter portion of the connecting portion head of the connecting member.

FIG. 24 is a second view showing the operation of the needle withdrawing mechanism shown in FIG. 21 for cutting off the reduced diameter portion of the connecting portion head of the connecting member.

The reference numbers illustrate:

10: medicament container

11: container body

12: container joint

121: female joint

122: clamping groove

13: back film

2: injection module

20: switching mechanism

21: conversion connecting seat

211: base body

212: valve seat part

213: input adapter

2131: male joint

2132: clamping hook

214: output adapter

215: connecting plate

216: clamping part

217: hook part

218: back film

22: driving piston group

221: piston cylinder

2211: valve member connecting end portion

2212: sliding chute

2213: clamping block

222: valve member

2221: input one-way valve

2222: output one-way valve

223: piston rod

2231: sliding block

2232: l-shaped clamping groove

30: needle outlet mechanism

31: base seat

311: movable room

312: seat board

3121: joining part

313: perforation

314: through hole

315: movable opening

316: fixing buckle

32: connecting part

321: connecting base

3211: base peripheral wall

3212: needle assembly part

3213: needle chamber

3214: needle plug hole

3215: cutting edge part

322: connecting head

3221: diameter reducing part

33: needle set

331: soft needle

332: needle plug

333: hard needle

34: needle-out operation assembly

341: needle outlet operation piece

3411: push button part

3412: cutting knife part

342: needle stand

3421: needle stand head end

3422: needle stand connecting rod

3423: joining part

343: sealing member

3431: sealing gasket

3432: cover cap

344: spring

35: narrowing operation member

351: pressing part

352: propping inclined plane

353: extension part

36: safety protecting cover

37: safety pin

38: push spring

40: driving mechanism

41: shell body

411: sleeve joint pipe part

4111: l-shaped clamping groove

412: housing component

413: housing component

414: fixing hook

42: driving member

420: connecting end

421: clamping lug

422: reset spring

43: electric drive unit

431: drive assembly

432: transmission assembly

4321: transmission rod

4322: gear set

4323: eccentric cam

44: control unit

441: control circuit board

442: display panel

443: control key

444: contact switch

45: electricity storage unit

46: electrical connection element

Detailed Description

The technical means adopted by the invention to achieve the preset purpose are further described below by combining the accompanying drawings and the preferred embodiments of the invention.

Referring to fig. 1 and 2, a preferred embodiment of the injector of the present invention is disclosed, which is seen from the drawings, wherein the injector defines an X-axis, a Y-axis and a Z-axis which are perpendicular to each other in three-dimensional space, and two opposite sides of the X-axis are respectively a front side and a back side, and the injector comprises a medicament container 10, an injection module 2 and a driving mechanism 40. The following description is provided for each specific structure.

As shown in fig. 1 to 3, the medicine container 10 is used for accommodating and sealing a predetermined dose of medicine liquid, the medicine container 10 includes a container body 11 and a container joint 12, the container body 11 has a space capable of accommodating the medicine liquid in a sealing manner, the container joint 12 is located on one side of the container body 11 in the Z-axis direction and is communicated with the inside of the container body 11, and the medicine liquid filled in the container body 11 can be output through the container joint 12. In the preferred embodiment, the back adhesive sheet 13 with release paper can be disposed on the back of the container body 11 of the medicament container 10, so that the medicament container 10 can be adhered to a human body or an article by the back adhesive sheet 13 after being torn off from the release paper; alternatively, the back film is replaced with a strap, and the medicine container is fixed to a human body or an article by the strap. The medicament container 10 can be assembled with the injection module 2 by means of the container connector 12.

As shown in fig. 1, 2 and 4, the injection module 2 includes a conversion mechanism 20 and a needle discharging mechanism 30, the conversion mechanism 20 and the needle discharging mechanism 30 can be assembled in advance to form a modular structure when shipped from a factory, so that a user can quickly assemble the injection module 2 with the medicament container 10 and the driving mechanism 40 for use. This injection module 2's back can set up the backing film that has from type paper, makes it can tear from type paper after to the backing film pastes on human body or article, perhaps, this injection module 2's back sets up the band, replaces the backing film with the band, and borrows to be fixed in on human body or article by the band.

As shown in fig. 4 to 6, the switching mechanism 20 connects the medicament container 10 and the driving mechanism 40, the switching mechanism 20 includes a switching connecting seat 21 and a driving piston set 22, the switching connecting seat 21 includes an input adapter 213 and an output adapter 214, the input adapter 213 connects the medicament container 10, the output adapter 214 connects the needle outlet mechanism 30, in the preferred embodiment, the switching connecting seat 21 further includes a seat body 211 and a valve seat portion 212, the valve seat portion 212 is disposed on the seat body 211, the valve seat portion 212 has a fitting opening with an outward opening, the fitting opening can be assembled with the driving piston set 22, the input adapter 213 is disposed on a side of the valve seat portion 212 opposite to the fitting opening, the output adapter 214 is disposed in the seat body 211, the input adapter 213 and the output adapter 214 are respectively communicated with the fitting opening of the valve seat portion 212, the input adapter 213 detachably connects the container connector 12 of the medicament container 10, the output adapter 214 is connected to the needle output mechanism 30.

As shown in fig. 4 to 6, in the preferred embodiment, the socket of the valve seat 212 faces outward along the Y-axis direction, the input adapter 213 faces the Y-axis direction, and the output adapter 214 faces the Z-axis direction. The driving piston assembly 22 is installed at the engaging opening of the valve seat 212, and the driving piston assembly 22 can be controlled to move so as to draw the liquid medicine in the medicine container 10 into the driving piston assembly 22 through the input adapter 213, and then transfer the liquid medicine in the input driving piston assembly 22 to the output adapter 214 for output. The seat 211 may further have a connecting plate 215, and the connecting plate 215 is connected and combined with the needle discharging mechanism 30, wherein the connecting plate 215 forms a clamping portion 216 on two opposite sides of the Y-axis direction, and the connecting plate 215 has a hook portion 217, so that the connecting plate 215 can be clamped and combined with the needle discharging mechanism 30.

As shown in fig. 4 to 6, in the preferred embodiment, the input adapter 213 of the conversion mechanism 20 includes a male connector 2131 and at least one hook 2132, the container connector 12 of the medicament container 10 includes a female connector 121 and at least one slot 122, and by means of the matching combination of the male connector 2131 of the input adapter 213 and the female connector 121 of the container connector 12 and the matching combination of the hook 2132 of the input adapter 213 and the slot 122 of the container connector 12. The male connector 2131 and the female connector 121 may be standardized male luer connector (luer taper) and female luer connector (luer taper), respectively, and have a function of no leakage in a trace amount after being combined.

As shown in fig. 4 to fig. 6, in the preferred embodiment, the back surface of the connecting plate 215 of the seat body 211 of the converting connection seat 21 is provided with a back adhesive sheet 218 having a release paper, so that the back adhesive sheet 218 can be adhered to a human body or an article after the release paper is torn off, or the back surface of the seat body 211 of the converting connection seat 21 is provided with a strap, which replaces the back adhesive sheet and is fixed to the human body or the article by the strap.

As shown in fig. 2, 4 to 6 and 7 to 9, in the preferred embodiment, the driving piston assembly 22 includes a piston cylinder 221, a valve element 222 and a piston rod 223 capable of moving linearly in the piston cylinder 221 along the Y axis direction, one end of the piston cylinder 221 has a valve element connecting end portion 2211, the piston cylinder 221 has a piston chamber therein, the piston chamber extends to the other end of the piston cylinder 221 along the Y axis direction and is formed with an opening, the piston cylinder 221 is combined with the valve element 222 at the valve element connecting end portion 2211 and is disposed in the valve seat portion 212, the valve element 222 has an input check valve 2221 and an output check valve 2222 therein, the input check valve 2221 is correspondingly connected to the input adapter 213, and the input check valve 2221 can be opened only in one direction from the input adapter 213 to the valve seat portion 212, the output check valve 2222 is correspondingly connected to the output adapter 214, and the output check valve 2222 can be opened only in one direction from the output adapter 214, the input adapter 213 and the output adapter 214 of the conversion connecting seat 21 can be controlled to communicate with the piston chamber of the piston cylinder 221 through the input check valve 2221 and the output check valve 2222 of the valve element 222, respectively, the piston rod 223 can be installed in the piston cylinder 221 in a linear motion along the Y-axis direction, and the piston rod 223 can be detachably connected to the driving mechanism 40, so that the piston rod 223 can be driven by the driving mechanism 40.

As shown in fig. 4 to 6, in the preferred embodiment, at least one sliding slot 2212 extending along the Y-axis direction is disposed in the inner wall of the piston cylinder 221, at least one sliding block 2231 is disposed on the outer peripheral surface of the piston rod 223, and each sliding block 2231 is disposed in the corresponding sliding slot 2212 for guiding the piston rod 223 to move linearly along the Y-axis direction in the piston cylinder 221. In addition, the piston rod 223 is a hollow rod having at least one L-shaped engaging groove 2232, so that the piston rod 223 and the driving mechanism 40 can be connected in a rotatable engaging manner, and the piston rod 223 can be driven by the driving mechanism 40.

As shown in fig. 2, 4 and 10 to 14, the needle-out mechanism 30 is connected to the switching mechanism 20 for injecting the medicine liquid, and the needle-out mechanism 30 includes a base 31, a connecting member 32, a needle set 33, a needle-out operation assembly 34 and a needle retracting operation member 35.

As shown in fig. 10 to 14, the base 31 can be assembled with the seat body 211 of the conversion mechanism 20, the base 31 has a movable chamber 311 with an opening facing the front side of the X-axis direction, the movable chamber 311 has a seat plate 312 facing the back side of the X-axis direction, the seat plate 312 has a through hole 313 communicating with the movable chamber 311, the base 31 has a through hole 314 communicating with the movable chamber 311 on one side of the movable chamber 311 in the Y-axis direction, and the base 31 has a movable opening 315 communicating with the movable chamber 311 on one side facing the conversion mechanism 20. The seat plate 312 is provided with a combining portion 3121 at two sides of the Y-axis direction, the combining portion 3121 is correspondingly combined with the clamping portion 216 of the connecting plate 215 of the converting connecting seat 21 of the converting mechanism 20, the hook portion 217 of the connecting plate 215 can be clamped and fixed with the seat plate 312, and the base 31 can be further provided with a fixed buckle 316 at the periphery of the movable chamber 311.

As shown in fig. 10 to 14, the connecting member 32 is movably installed in the moving chamber 311 of the base 31 along the X-axis direction, and the connecting member 32 includes a connecting base 321 and a connecting head 322, the connecting base 321 has a base wall 3211 and a needle assembling portion 3212 installed in the base wall 3211, the needle assembling portion 3212 has a needle chamber 3213 therein, and an end of the needle assembling portion 3212 facing the seat plate 312 of the base 31 is provided with a needle jack 3214 communicating with the needle chamber 3213, the needle jack 3214 corresponds to the through hole 313 of the seat plate 312, that is, the position of the needle jack 3214 corresponds to the position of the through hole 313, the connecting head 322 is installed on the connecting base 321 and communicates with the needle chamber 3213 in the needle assembling portion 3212, and the connecting head 322 extends in the Z-axis direction, in the preferred embodiment, an end of the connecting head 322 connected to the connecting base 321 forms a diameter reducing portion 3221 capable of being cut off, the connecting head 322 of the connecting component 32 passes through the movable opening 315 of the base 31 and is connected to the output adapter 214 of the switching mechanism 20. The base portion peripheral wall 3211 includes at least one cutting edge 3215 on a side away from the seat plate 312 of the base 31.

As shown in fig. 10 to 14, the needle set 33 is movably installed in the needle set installation part of the connection member 32 in the X-axis direction, and is operated to perform needle withdrawing and needle retracting operations, the needle set 33 includes a soft needle 331, a needle plug 332 and a hard needle 333, the soft needle 331 can be installed in the needle chamber 3213 of the needle set installation portion 3212 movably along the X-axis direction, one end of the soft needle 331 faces the needle plug hole 3214, the other end of the soft needle 331 is fixed to the needle plug 332, in the needle-out state where the soft needle 331 is driven to extend out of the seat plate 312 of the base 31, the needle plug 332 can be fixed in the needle plug hole 3214, the hard needle 333 can be driven to penetrate through the needle plug 332 and the soft needle and be discharged together with the soft needle 331, after the soft needle 331 is withdrawn, the hard needle 333 can be driven to be disengaged from the soft needle 331, and the soft needle 331 is communicated with the switching mechanism 20 through the needle chamber 3213 and the connecting head 322 to provide a path for the medicine liquid to flow; in the narrowing state, the soft needle 331 can be retracted into the base 31 together with the connecting member 32.

As shown in fig. 10 to 14, the needle discharging operation assembly 34 is installed in the base 31 and can drive the needle set 33 to perform a needle discharging operation, and the needle discharging operation assembly 34 includes a needle discharging operation member 341, a needle holder 342, a sealing member 343 and a spring 344.

As shown in fig. 10 to 14, the needle discharging operation element 341 is movably installed in the base 31 along the X-axis direction, and the needle discharging operation element 341 is fastened and fixed by the fixing hook 316 of the base 31, the needle discharging operation element 341 includes a button 3411 and an accommodating space located at one side of the button 3411, the accommodating space corresponds to the movable chamber 311 of the base 31, that is, the position of the accommodating space corresponds to the position of the movable chamber 311. The needle-out operating element 341 has a cutting blade 3412 on a side corresponding to the connecting head 322, and the cutting blade 3412 can be operated to cut the reduced diameter portion 3221 of the connecting head 322 of the connecting member 32.

As shown in fig. 10 to 14, the needle seat 342 is disposed in the movable chamber 311 of the needle discharging operation member 341 and connected to the needle discharging operation member 341, after the needle seat 342 is in the needle discharging state, the needle seat 342 can be separated from the needle discharging operation member 341, the needle seat 342 includes a needle seat head end 3421 and a needle seat connecting rod 3422, the needle seat head end 3421 is connected to the needle discharging operation member 341, the needle seat connecting rod 3422 is formed at the needle seat head end 3421, and the needle seat connecting rod 3422 is connected to the hard needle 333 and can push against the needle plug 332 of the needle set 33.

As shown in fig. 10 to 14, in the preferred embodiment, the needle holder 342 and the needle discharging operation element 341 are integrally formed, and a connection portion 3423 capable of being cut off is provided between the periphery of the head end 3421 of the needle holder and the inner wall of the accommodating space of the needle discharging operation element 341. The engagement portion 3423 is cut by the cutting edge portion 3215 of the coupling member 32 mounted on the base 31, and the needle holder 342 is disengaged from the needle discharge operation member 341.

As shown in fig. 10 to 14, the sealing member 343 is mounted in the connecting component 32 in combination with the spring 344, the sealing member 343 is disposed outside the needle assembling portion 3212 and covers the needle chamber 3213, the sealing member 343 is tightly sleeved outside the needle hub connecting rod 3422, the spring 344 is sleeved outside the needle hub connecting rod 3422, two ends of the spring 344 are respectively connected to the needle hub head end 3421 of the needle hub 342 and the sealing member 343, in the preferred embodiment, the sealing member 343 includes a sealing pad 3431 and a covering cap 3432 sleeved outside the sealing pad 3431, the covering cap 3432 provides a portion against which the spring 344 abuts, and the sealing pad 3431 is tightly sleeved outside the needle hub connecting rod 3422.

As shown in fig. 10 to 14, when the needle discharging operation member 341 is pressed toward the base 31, the hard needle 333 of the needle set 33 is inserted into the soft needle 331, so the needle output operation member 341 drives the needle seat 342 to push the needle set out of the seat plate 312 of the base 31, while pressing against the link member 32 via the spring 344, the link member 32 is abutted against the seat plate 312 of the base 31 at the back side, namely, the soft needle 331 is combined with the hard needle 333 to pierce the human body until the needle plug 332 is fixed in the needle plug hole 3214 of the needle assembly portion 3212, the needle discharging operation member 341 is fixed by the fixing buckle 316 in the base 31, the engagement portion 3423 at the periphery of the needle base 342 is cut off by the cutting edge portion 3215 of the connection member 32, the needle base 342 is automatically pushed to move outwards by the elastic force of the spring 344, meanwhile, the hard needle 333 is driven to be drawn out from the soft needle 331 through the needle seat connecting rod 3422 of the needle seat 342, so that the soft needle 331 is communicated with the switching mechanism 20 through the needle chamber 3213 and the connecting head 322 of the connecting component.

As shown in fig. 10 to 14, the narrowing operator 35 extends from the outer side of the base 31 into the movable chamber 311 through a through hole. The needle retracting operation member 35 includes a pressing portion 351, a top abutting inclined surface 352 and an extending portion 353, the pressing portion 351 is located outside the base 31, the top abutting inclined surface 352 is located on one side of the pressing portion 351 extending into the movable chamber 311, the top abutting inclined surface 352 abuts against the base peripheral wall 3211 of the connecting member 32, the extending portion 353 is located on one side of the pressing portion 351 extending into the movable chamber 311 and bypasses the needle assembling portion 3212 of the connecting member 32, the end of the extending portion 353 is provided with a limit hook, and the base 31 limits the limit hook to enable the needle retracting operation member 35 to be installed in the base 31, and can move in a limited distance and cannot be separated from the base 31. When the pressing portion 351 of the needle retracting operation member 35 is pressed, the abutting inclined surface 352 can push the connecting member 32 in the base 31 away from the seat plate 312 of the base 31 on the back side, so as to drive the connecting member 32 and the soft needle 331 of the needle set 33 penetrating through the connecting member 32 to retract into the base 31.

As shown in FIG. 10, FIG. 11 and FIG. 14, the needle-out mechanism 30 can be further provided with a safety cover 36 and a safety pin 37 to ensure the safety of the needle-out mechanism 30. The safety protecting cover 36 covers the outer side of the needle discharging operation assembly 34 and can be fixed on the base 31 in a clamping manner, the safety pin 37 penetrates through the safety protecting cover 36 and the needle discharging operation member 341 of the needle discharging operation assembly 34 to be fixed, so that the needle discharging mechanism 30 can execute the needle discharging action after the safety pin 37 is pulled out and the safety protecting cover 36 is taken down, and the use safety is ensured. In addition, a pushing spring 38 may be disposed between the safety cover 36 and the needle-out operation member 341, so that after the safety pin 37 is removed, the safety cover 36 is automatically ejected from the base 31 by the pushing spring 38, thereby improving the convenience of operation.

As shown in fig. 1, 2 and 15 to 16, the driving mechanism 40 is assembled with the conversion mechanism 20 of the injection module and can drive the piston rod 223 in the conversion mechanism 20 to move, and the driving mechanism 40 can be a manual driving mechanism or an electric driving mechanism. Preferably, the driving mechanism 40 is detachably connected to the switching mechanism 20 of the injection module, so that the driving mechanism 40 can be reused. The driving mechanism 40 includes a housing 41 and a driving member 42 installed in the housing 41, the housing 41 is detachably connected to the converting connecting seat 21 of the converting mechanism 20, the driving member 42 is detachably connected to the piston rod 223, and the driving member 42 can drive the piston rod 223 to move manually or electrically.

In the preferred embodiment shown in fig. 15 to 16, the housing 41 is a hollow body having a space therein, the side of the housing 41 has a sleeve pipe portion 411, the sleeve pipe portion 411 has a shaft hole extending from the outside to the inside of the housing 41, and the sleeve pipe portion 411 is detachably sleeved on the outside of the piston cylinder 221 of the switching mechanism 20.

As shown in fig. 15 to 16, in the preferred embodiment, the housing 41 is formed by assembling a plurality of

housing parts

412, 413 by screwing, clipping or bonding. This cup joint pipe portion 411 and piston cylinder 221 are connected with the joint mode of can rotating, and wherein, the outer peripheral face of piston cylinder 221 is equipped with fixture block 2213, cup joints pipe portion 411 and is equipped with L shape draw-in groove 4111, borrows the combination of fixture block 2213 and L shape draw-in groove 4111, and this cup joint pipe portion 411 and piston cylinder 221 can rotate the joint mode and connect.

As shown in fig. 15 to 16 in conjunction with fig. 8 and 9, the driving member 42 is installed in the socket pipe 411 of the housing 41 in a linear motion manner, and an end of the driving member 42 facing the outside of the socket pipe 411 is a connecting end 420, and the connecting end 420 is detachably connected to the piston rod 223. In the preferred embodiment, the outer peripheral surface of the connecting end 420 of the driving member 42 has at least one engaging protrusion 421, and the driving member 42 can be installed in the piston rod 223, and the engaging protrusion 421 is correspondingly engaged with the L-shaped engaging groove 2232 of the piston rod 223, so that the piston rod 223 and the driving mechanism 40 can be rotatably engaged with each other.

As shown in fig. 15 to 16, in the preferred embodiment, the driving mechanism 40 is an electric driving mechanism, but not limited thereto. When the driving mechanism 40 is an electric driving mechanism, the driving mechanism 40 includes an electric driving unit 43 and a control unit 44, or further includes an electric power storage unit 45, in addition to the housing 41 and the driving member 42 installed in the housing 41.

As shown in fig. 15 to 16, the electric driving unit 43 is installed in the housing 41 and can be connected to the driving member 42 disposed in the sleeve pipe 411 of the housing 41, the electric driving unit 43 includes a driving component 431 and a transmission component 432, the driving component 431 can be an electric driving mechanism including a motor and a pump or other electric rotating driving mechanism, and the transmission component 432 is connected to the driving component 431 and the driving member 42, so that the driving component 431 can drive the driving member 42 through the transmission component 432. In the preferred embodiment, the transmission assembly 432 includes a transmission rod 4321 and a gear set 4322, the transmission rod 4321 is pivotally disposed in the housing 41, the transmission rod 4321 has at least one eccentric cam 4323, the gear set 4322 includes a plurality of gears engaged with each other, the gear set 4322 is connected between the driving assembly 431 and the transmission rod 4321, the eccentric cam 4323 of the transmission rod 4321 is connected to the other end of the driving member 42 located in the housing 41, and a return spring 422 is disposed between the driving member 42 and the housing 41 for combining with the eccentric cam 4323 of the transmission rod 4321 to drive the driving member 42 and the piston rod 223 connected thereto to reciprocate linearly. In the preferred embodiment, the return spring 422 is a compression spring, the return spring 422 is sleeved outside the driving element 42, the other end of the driving element 42 located in the casing 41 has an abutting flange, and two ends of the return spring 422 abut against the abutting flanges of the casing 41 and the driving element 42, respectively.

As shown in fig. 15 to 16, the control unit 44 is installed in the casing 41, and the control unit 44 includes a control circuit board 441 and a display panel 442, the display panel 442 is electrically connected to the control circuit board 441, and the display panel 442 is exposed on the front surface of the casing 41, the display panel 442 may be a display panel with a display function, the control unit 44 further includes at least one control key 443, the control key 443 is installed on the front surface of the casing 41 and located at a side of the display panel 442, and the control key 443 is electrically connected to the control circuit board 441, so as to provide a user with switching, setting and operation through the control key 443. Alternatively, the display panel 442 may also be a touch display panel, which is capable of displaying the working state and has user operation definitions for the user to perform setting and operation on the display panel.

As shown in fig. 15 to 16, the control unit 44 further includes at least one contact switch 444, the contact switch 444 is disposed on one side of the housing 41 adjacent to the needle-out mechanism 30 and electrically connected to the control circuit board 441, and when the driving mechanism 40 is connected to the switching mechanism 20 of the injection module 2, the needle-out mechanism 30 of the injection module 2 can contact the contact switch 444 to switch the control unit 44 from the off state to the on state. The driving mechanism 40 may further include a fixing hook 414 disposed at a position of the housing 41 adjacent to the contact switch 444, and the base 31 of the needle discharging mechanism 30 is fixed on the housing 41 by the fixing hook 414, so that the driving mechanism 40 is firmly combined with the injection module 2.

As shown in fig. 15 to 16, the control unit 44 can be connected to an external power source or the power storage unit 45, and the external power source or the power storage unit 45 provides the electric power required for the operation of the driving mechanism 40. In the preferred embodiment shown in fig. 15 to 16, the driving mechanism 40 further includes an electric storage unit 45, and the electric storage unit 45 is disposed in the housing 41 and electrically connected to the control circuit board 441 of the control unit 44. The power storage unit 45 can be a wireless charging type power storage unit, a wired charging type power storage unit, or other non-charging type power storage units (e.g., a battery). In the preferred embodiment shown in fig. 15 to 16, the power storage unit 45 is a rechargeable power storage unit, such as: the electricity storage unit 45 is electrically connected to an electrical connection element 46, and the electrical connection element 46 is exposed outside the housing 41 and can be connected to an external power source through a connection line, so as to charge the electricity storage unit 45. The electrical connection element 46 may be a Universal Serial Bus (USB) type electrical connection element or other types of electrical connection elements.

Referring to fig. 17 and 18, the conversion mechanism 20 and the needle-out mechanism 30 are pre-assembled to form an injection module 2, before the user intends to perform subcutaneous injection, the medicine container 10 with the injection medicine liquid and the driving mechanism 40 are sequentially assembled with the switching mechanism 20 of the injection module 2, wherein, the medicament container 10 is formed by butt-jointing and combining the container joint 12 and the input adapter 213 of the conversion mechanism 20 of the injection module 2, and then connecting the driving mechanism 40 with the conversion mechanism 20, wherein, the sleeve pipe part 411 of the driving mechanism 40 is assembled with the piston cylinder 221 of the conversion mechanism 20 in a rotary clamping way, at the same time, the driving member is connected to the piston rod 223, and after the injection module 2 is rotated to reach a predetermined position, the needle withdrawing mechanism 30 contacts the contact switch 444 of the driving mechanism 40, so that the control unit 44 of the driving mechanism 40 is switched from the off state to the on state.

As shown in fig. 18 to 21, before injection, the medicine container 10 and the injection module 2 are fixed on the predetermined injection site of the human body by means of the adhesive tape 13 or the band tightening, the safety pin 37 and the safety cover 36 of the needle discharging mechanism 30 of the injection module 2 are removed, then the needle discharging operation member 341 of the needle discharging mechanism 30 is pressed to fix the needle discharging operation member 341 on the base 31, the needle set 33 is pushed through the needle seat 342, the needle set 33 extends out of the base 31 by means of the hard needle 333 inserted in the soft needle 331 and directly penetrates into the human body, the engagement portion 3423 between the needle seat 342 and the needle discharging operation member 341 is cut off by the cutting edge portion 3215 of the connecting member 32, the needle seat 342 is pushed by the elastic force of the spring 344, the hard needle 333 is driven by the needle seat to be withdrawn from the soft needle 331, the soft needle 331 is left in the human body, the soft needle 331 is communicated with the output switching mechanism 214 of the needle chamber 3213 and the connecting head 322, then, the user can operate the driving mechanism 40 to drive the driving piston set 22 of the switching mechanism 20 to move, so as to draw the medicine liquid from the medicine container 10 and transfer the medicine liquid to the needle discharging mechanism 30, so as to inject the medicine liquid into the human body through the soft needle 331. After the injection is completed, the driving mechanism 40 is stopped to drive the driving piston group 22 of the conversion mechanism 20. Thus, by fixing the syringe to the human body and maintaining the soft needle 331 inserted into the human body, the user can inject a plurality of injections at regular times through the driving mechanism 40.

When the medicine liquid in the medicine container 10 is used up, as shown in fig. 22, the user can press the narrowing operation member 35 of the needle withdrawing mechanism 30, push the connecting member 32 in the base 31 away from the seat plate 312 on the back of the base 31 by the abutting inclined surface 352 of the narrowing operation member 35, at the same time, the soft needle 331 of the needle set 33 disposed in the connecting component 32 is pulled out of the human body and retracted into the base 31 together, as shown in fig. 23 and 24, at this time, in the pushing process of the connecting part 32 being the abutting inclined plane 352 of the needle retracting operation member 35, the reducing diameter portion 3221 of the connecting head 322 of the connecting part 32 connected with the converting mechanism 20 is cut off by the cutter portion 3412 of the needle withdrawing operation member 341 fixed on the base 31, so that the injection module 2 can not be reused, the use safety of the injector is ensured, the drive mechanism 40 can be removed from the injection module 2 after use of the injector, and left for further use.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A syringe, comprising:

an injection module, comprising:

2. The syringe of claim 1, wherein the needle withdrawing mechanism comprises a base, a connecting member, a needle withdrawing operation member, and a needle retracting operation member, the base is connected to the switching connecting seat, the connecting member is movably disposed in the base, the connecting member is connected to the output adapter of the switching mechanism, the needle set is movably disposed in the connecting member, the needle set comprises a soft needle, a needle plug disposed at one end of the soft needle, and a hard needle capable of being inserted into the soft needle, the needle withdrawing operation member is movably disposed in the base and connected to the needle set, the needle withdrawing operation member is operable to drive the needle set disposed in the connecting member to extend out of the base to withdraw the needle in a manner that the hard needle is inserted into the soft needle, and then drive the hard needle to disengage from the soft needle, so that the soft needle is communicated with the output adapter of the switching mechanism via the connecting member, the narrowing operation piece can be movably arranged in the base, and can be operated to drive the connecting part and the soft needle penetrating through the connecting part to retract into the base.

3. The syringe as claimed in claim 2, wherein the needle discharging mechanism has a movable chamber in the base, the back of the base has a seat plate and a through hole in the seat plate communicating with the movable chamber, and the side of the base facing the switching mechanism has a movable opening communicating with the movable chamber, the base has a fixed hook at the periphery of the movable chamber;

the connecting component can be movably arranged in the movable chamber of the base and comprises a connecting base part and a connector, wherein the connecting base part is provided with a base part peripheral wall and a needle assembling part arranged in the base part peripheral wall, the needle assembling part is provided with a needle chamber, one end of the needle assembling part facing the seat plate is provided with a needle plug hole communicated with the needle chamber, the needle plug hole corresponds to the through hole of the seat plate, the connector is arranged on the connecting base part and communicated with the needle chamber in the needle assembling part, the connector penetrates through the movable opening of the base and is connected with an output adapter of the switching mechanism, and the base part peripheral wall is provided with at least one cutting edge;

the soft needle of the needle group can be movably arranged in the needle chamber of the needle group installation part, and the needle plug arranged on the soft needle can be fixed in the needle plug hole in an operation way;

the needle-out operation assembly includes a needle-out operation component, a needle seat, a sealing component and a spring, the needle-out operation component can be movably mounted in the base seat, and can be fastened and fixed by means of fixing fastener of said base seat, said needle-out operation component includes a button portion and a receiving space positioned on one side of said button portion, said receiving space is correspondent to said movable chamber, said needle seat is placed in the receiving space of said needle-out operation component and connected with said needle-out operation component, said needle seat includes a needle seat head end and a needle seat connecting bar formed on the needle seat head end, between the periphery of said needle seat head end and inner wall of receiving space of said needle-out operation component an engagement portion which can be cut off by said cutting edge portion is set, said needle seat connecting bar is connected with said hard needle and can be pushed against needle plug of said needle group, said sealing component is combined with said spring and mounted in said connecting component, said sealing component is positioned outside the needle group mounting portion and is covered with said needle chamber, the sealing component is tightly sleeved outside the needle seat connecting rod, the spring is sleeved outside the needle seat connecting rod, and two ends of the spring are respectively connected with the needle seat head end of the needle seat and the sealing component.

4. The syringe of claim 3, wherein the end of the connecting head of the connecting member connected to the connecting base portion is formed with a reduced diameter portion which is reduced in diameter and can be cut off, and the needle extracting operation member has a cutting blade portion on a side thereof corresponding to the connecting head, the cutting blade portion being operable to cut the reduced diameter portion of the connecting head of the connecting member.

5. The syringe of claim 3, wherein the base has a through hole on one side of the movable chamber, the retracting operation member extends into the movable chamber from the outside of the base through the through hole, the retracting operation member includes a pressing portion, a propping inclined surface and an extending portion, the pressing portion extends out of the base, the propping inclined surface is located on one side of the pressing portion extending into the movable chamber, the propping inclined surface abuts against the base peripheral wall of the connecting member, the extending portion is located on one side of the pressing portion extending into the movable chamber and bypasses the needle assembling portion of the connecting member;

one end of the connecting head of the connecting component, which is connected with the connecting base part, is provided with a reducing part with reduced diameter and capable of being cut off, one side of the needle outlet operating piece, which corresponds to the connecting head, is provided with a cutting knife part, and the cutting knife part can be operated to cut the reducing part of the connecting head of the connecting component.

6. The syringe of any one of claims 2 to 5, wherein the needle discharging mechanism further comprises a safety cover covering the outside of the needle discharging operation assembly and being able to be fastened to the base, and a safety pin passing through the safety cover and the needle discharging operation member of the needle discharging operation assembly, and a pushing spring is disposed between the safety cover and the needle discharging operation member.

7. The injector according to any one of claims 1 to 5, wherein the adapter connector further comprises a seat body and a valve seat portion disposed on the seat body, the valve seat portion has a fitting opening, the input adapter is disposed on a side of the valve seat portion opposite to the fitting opening, the output adapter is disposed in the seat body, the input adapter and the output adapter are respectively communicated with the fitting opening, the driving piston assembly comprises a piston cylinder having a piston chamber, a valve member and a piston rod capable of moving linearly in the piston cylinder, one end of the piston cylinder has a valve member connecting end portion, the valve member connecting end portion is combined with the valve member and disposed in the valve seat portion, the valve member has an input check valve therein correspondingly connected to the input adapter, and an output check valve correspondingly connected to the output adapter, the piston rod is linearly movably disposed in the piston cylinder, the piston rod is detachably connected with a driving piece of the driving mechanism.

8. The syringe of claim 7, wherein the housing has a socket portion at a side thereof, the socket portion being detachably fitted to an outer side of the piston cylinder of the switching mechanism, the driving member being linearly movably fitted in the socket portion;

the driving mechanism comprises an electric driving unit and a control unit, the electric driving unit is arranged in the shell and comprises a driving component and a transmission component, the transmission component is connected with the driving component and the driving part, the control unit is arranged in the shell and comprises a control circuit board and a display panel electrically connected with the control circuit board, and the display panel is exposed out of the shell.

9. The injector of claim 8 wherein the drive assembly comprises a drive rod pivotally disposed within the housing and a gear set, the drive rod having at least one eccentric cam, the gear set coupled between the drive assembly and the drive rod, the eccentric cam of the drive rod coupled to the drive member, and a return spring disposed between the drive member and the housing.

10. The syringe of claim 8, wherein the drive mechanism further comprises an electrical storage unit disposed within the housing and electrically connected to the control circuit board of the control unit.