Driving piston assembly and conversion mechanism of syringe

Abstract

The present invention relates to a driving piston group and a conversion mechanism of a syringe. The conversion mechanism comprises a driving piston group and a conversion connection seat. The piston cylinder of the driving piston group is respectively connected to a medicine container containing a medicine liquid and a needle ejection mechanism having a needle group through an input one-way valve and an output one-way valve of a valve member. A piston rod arranged in the piston cylinder is detachably connected to the driving mechanism and can be driven by the driving mechanism, so that the conversion mechanism is combined with the needle ejection mechanism to form an injection module. During injection, the needle group of the needle ejection mechanism can pierce the human body. The driving mechanism drives the driving piston group to transport the medicine liquid in the medicine container to the needle group of the needle ejection mechanism to perform injection of the medicine liquid. The medicine container and the injection module are disposable and disassembled and discarded after use. The driving piston group of the conversion mechanism can be externally connected to the combined structure of the driving mechanism, so that the driving mechanism will not contact the injection medicine liquid at all during the injection of the medicine liquid. The driving mechanism can be reused, thereby reducing unnecessary material waste of the syringe.

Description

[0001] This application is a divisional application of the original application "Syringe". The application date of the original application is September 25, 2020, and the application number is 202011022142.X. Technical Field

[0002] The invention relates to a syringe used for subcutaneous injection of a medicinal liquid into a human body, in particular to a driving piston group in the syringe and a conversion mechanism containing the driving piston group. Background Art

[0003] The structure of the current syringe for subcutaneous injection of liquid medicine in human body mainly uses an injection module that can be manually or electrically operated to connect with a medicine container, so that the needle group of the injection module can be inserted into the human body for subcutaneous injection. In addition, in order to facilitate multiple subcutaneous injections to the human body, the existing syringe uses a needle group including a soft needle and a hard needle. When the needle group is inserted into the subcutaneous part of the human body, it is difficult to directly insert the soft needle into the human body because the soft needle is soft. Therefore, the soft needle is inserted into the subcutaneous part of the human body first, and then the hard needle is removed from the soft needle. Then, the soft needle is connected to the injection module and the medicine container for injection. At the same time, the soft needle can stay in the subcutaneous part of the human body for a long time, so as to perform multiple injections.

[0004] Existing syringes are based on the safety regulations for the injection of liquid medicines, and although some of the existing syringes have the function of being reused a limited number of times, after the number of uses of the existing syringes is reached, the entire set of syringes must be discarded, and the entire set of syringes cannot be reused. Moreover, the existing syringes adopt a fixed combination structure, and their driving mechanism is directly connected to the injection module, which will contact the injection medicine. Based on the principle of safety and hygiene, it is difficult to reuse some of the existing mechanisms of the syringes, and further improvement is necessary. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a driving piston group and a conversion mechanism for a syringe, so as to solve the problems that after the use of the existing fixed syringe, the entire set of syringes needs to be discarded for safety and hygiene reasons, and the driving mechanism of the existing syringe will contact the injection drug and is difficult to reuse.

[0006] The technical solution proposed by the present invention is: to provide a syringe drive piston group, which is used in a syringe, the drive piston group can be installed in a conversion mechanism of the syringe, and the drive piston group can be connected to a drive mechanism; wherein,

[0007] The driving piston assembly includes a piston cylinder, a valve member and a piston rod;

[0008] The piston cylinder has a piston chamber, and one end of the piston cylinder has a valve member connecting end;

[0009] The valve member is arranged in the valve member connecting end of the piston cylinder, and has an input check valve and an output check valve in the valve member. The input check valve can only be opened in one direction toward the piston cylinder, and the output check valve can only be opened in one direction outward from the piston cylinder.

[0010] The piston rod can be installed in the piston cylinder in a linear motion, and the piston rod can be detachably connected to the driving mechanism; the driving piston group is connected to a medicine container containing a medicine liquid and a needle ejection mechanism with a needle group through the conversion mechanism, so that the driving mechanism can drive the piston rod in the piston cylinder to pump the medicine liquid in the medicine container to the needle ejection mechanism, and the needle group of the needle ejection mechanism performs the injection of the medicine liquid.

[0011] In the driving piston assembly of the syringe as described above, at least one slide groove is provided in the inner wall of the piston cylinder, and at least one slider is provided on the outer peripheral surface of the piston rod. Each slider is respectively arranged in the slide groove corresponding to the position to guide the piston rod to move along a straight line in the piston cylinder.

[0012] In the driving piston assembly of the syringe as described above, the piston rod is a hollow rod having at least one L-shaped clamping groove. The piston rod can be connected to the driving mechanism by a rotational clamping manner, and the piston rod can be driven by the driving mechanism.

[0013] Another technical solution proposed by the present invention is to provide a conversion mechanism of a syringe, which is used in a syringe, the conversion mechanism can be combined with a needle removal mechanism having a needle group to form an injection module, the conversion mechanism can be connected to a driving mechanism having a driving member, wherein the conversion mechanism includes a conversion connection seat, and a driving piston group installed in the conversion connection seat;

[0014] The conversion connector includes an input adapter and an output adapter;

[0015] The driving piston assembly includes a piston cylinder, a valve member and a piston rod. The piston cylinder has a piston chamber. One end of the piston cylinder has a valve member connecting end portion. The valve member is installed in the valve member connecting end portion. The valve member has an input one-way valve corresponding to the input adapter and an output one-way valve corresponding to the output adapter. The input one-way valve can only be opened in one direction from the input adapter toward the piston cylinder, and the output one-way valve can only be opened in one direction from the piston cylinder toward the output adapter. The piston rod can be installed in the piston cylinder in a linear motion, and the piston rod can be disassembled to connect the driving member of the driving mechanism.

[0016] The input adapter of the conversion mechanism can be connected to a medicine container containing medicine liquid, the output adapter can be connected to the needle ejection mechanism, the driving mechanism can drive the piston rod in the piston cylinder to pump the medicine liquid in the medicine container to the needle ejection mechanism, and then the needle group of the needle ejection mechanism performs the injection of the medicine liquid.

[0017] In the conversion mechanism of the syringe as described above, at least one slide groove is provided in the inner wall of the piston cylinder, and at least one slider is provided on the outer peripheral surface of the piston rod. Each slider is respectively arranged in the slide groove corresponding to the position to guide the piston rod to move along a straight line in the piston cylinder.

[0018] In the conversion mechanism of the syringe as described above, the piston rod is a hollow rod having at least one L-shaped clamping groove. The piston rod can be connected to the driving mechanism by a rotational clamping mode, and the piston rod can be driven by the driving mechanism.

[0019] In the conversion mechanism of the syringe as described above, the conversion connection seat also includes a seat body and a valve seat portion arranged on the seat body, the valve seat portion has a sleeve opening, the input adapter is arranged on the side of the valve seat portion opposite to the sleeve opening, the output adapter is arranged in the seat body, and the input adapter and the output adapter are respectively connected to the sleeve opening.

[0020] In the above-mentioned syringe conversion mechanism, the seat body has a connecting plate, two opposite sides of the connecting plate form a clamping portion respectively, and the connecting plate has a hook portion so that the connecting plate can be clamped and assembled with the needle ejection mechanism.

[0021] In the conversion mechanism of the syringe as described above, the driving mechanism includes a shell, the driving member is installed in the shell, the side of the shell has a sleeve tube part, the sleeve tube part can be detachably mounted on the outer side of the piston cylinder, and the driving member can be installed in the sleeve tube part for linear movement.

[0022] The beneficial effect that can be achieved by the present invention is that, through the invention of the structure composed of the driving piston group and the conversion mechanism of the aforementioned syringe, the driving piston group is detachably connected to the driving mechanism and can be driven by the driving mechanism to transport the medicinal liquid in the medicinal container to the needle group for injection of the medicinal liquid. In addition, the medicinal container is detachably connected by the adapter connecting seat of the conversion mechanism, so that the driving piston group can be driven by the driving mechanism and transport the medicinal liquid in the medicinal container to the needle group for injection of the medicinal liquid. In this way, the medicinal container and injection module involving safety and hygiene in the syringe are disposable, and are disassembled and discarded after use and are not reused. In addition, through the combined structure of the conversion mechanism and the external driving mechanism, the driving mechanism will not be in contact with the injection medicinal liquid at all during the injection process of the medicinal liquid. The driving mechanism of the syringe can be reused to reduce unnecessary material waste of the syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following drawings are intended only to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0024] Figure 1 It is a three-dimensional schematic diagram of a preferred embodiment of the conversion mechanism of the present invention including a driving piston group used in a syringe.

[0025] Figure 2 yes Figure 1 A partially exploded perspective schematic diagram of a syringe is shown.

[0026] Figure 3 yes Figure 1 and Figure 2 A three-dimensional schematic diagram of a medicine container in a syringe is shown.

[0027] Figure 4 yes Figure 1 and Figure 2 A schematic diagram of the combination of the injection module in the syringe shown.

[0028] Figure 5 yes Figure 1 , Figure 2 and Figure 4 A three-dimensional exploded schematic diagram of the conversion mechanism in the injection mold is shown.

[0029] Figure 6 yes Figure 1 , Figure 2 and Figure 4 A schematic three-dimensional exploded view of the conversion mechanism in the injection mold shown in another viewing angle.

[0030] Figure 7 yes Figure 1 and Figure 2 A schematic partial side plan view of a syringe is shown.

[0031] Figure 8 is along Figure 7 Schematic diagram of the cross section along line AA.

[0032] Fig. 9 is along Figure 7 Schematic diagram of the cross section along line BB.

[0033] Fig.10 yes Figure 1 , Figure 2 and Figure 4 A three-dimensional exploded schematic diagram of the needle ejection mechanism in the injection mold is shown.

[0034] Fig.11 yes Figure 1 , Figure 2 and Figure 4The schematic diagram of the three-dimensional exploded view of the needle ejection mechanism in the injection mold assembly shown in another viewing angle.

[0035] Fig.12 yes Figure 1 , Figure 2 and Figure 4 A plan view schematically showing the needle ejection mechanism in the injection mold assembly shown.

[0036] Fig.13 is along Fig.12 Schematic diagram of the cross section along the CC line.

[0037] Fig.14 is along Fig.12 Schematic diagram of the cross section of the DD line.

[0038] Fig.15 yes Figure 1 and Figure 2 A schematic perspective exploded view of the drive mechanism in the syringe shown.

[0039] Fig.16 yes Figure 1 and Figure 2 Another exploded perspective view of the drive mechanism in the syringe is shown.

[0040] Fig.17 yes Figure 1 to Figure 2 The illustrated diagram is a schematic diagram of the operation of assembling a medicine container with an injection module when the syringe of the present invention is used.

[0041] Fig.18 yes Figure 1 to Figure 2 The diagram shows the operation of connecting the combination of the medicine container and the injection module to the drive mechanism when the syringe of the present invention is used.

[0042] Fig.19 yes Figure 1 to Figure 2 The illustrated diagram is a cross-sectional view of the needle ejection mechanism in the injection module when the syringe of the present invention is in use, with the safety cover and the safety pin removed.

[0043] Fig. 20 yes Fig.19 The needle ejection mechanism shown is a schematic diagram of the operation of the needle ejection operating assembly being pressed to drive the needle group located in the connecting component to extend the needle out of the base in the manner of a hard needle inserted into a soft needle.

[0044] Fig.21 yes Fig. 20 The needle ejection mechanism shown is a schematic diagram of the operation of the needle ejection operating member being fixed in the base, the needle seat being separated from the needle ejection operating member and ejected, thereby driving the hard needle to be separated from the soft needle.

[0045] Fig. 22 yes Fig. 20The needle removal mechanism shown is a schematic diagram of the operation of retracting the soft needle via the needle retracting operating member after the injection is completed.

[0046] Fig.23 yes Fig.21 The needle removal mechanism shown is a schematic diagram (I) of the operation of retracting the needle and cutting off the reduced diameter portion of the connecting portion of the connecting component.

[0047] Fig.24 yes Fig.21 The needle-extracting mechanism shown is a schematic diagram (II) of the operation of retracting the needle and cutting off the reduced diameter portion of the connecting portion of the connecting component.

[0048] Description of Figure Numbers:

[0049] 10: Medicine container

[0050] 11: Container body

[0051] 12: Container joint

[0052] 121: Female connector

[0053] 122: Card slot

[0054] 13: Adhesive backing film

[0055] 2: Injection mold

[0056] 20: Conversion mechanism

[0057] 21: Conversion connector

[0058] 211: base body

[0059] 212: Valve seat

[0060] 213: Input adapter

[0061] 2131: Male connector

[0062] 2132: Hook

[0063] 214: Output adapter

[0064] 215: Connecting plate

[0065] 216: Clamping part

[0066] 217: hook part

[0067] 218: Adhesive backing film

[0068] 22: Driving piston assembly

[0069] 221: Piston cylinder

[0070] 2211: Valve connection end

[0071] 2212: Chute

[0072] 2213: Card Block

[0073] 222: valve parts

[0074] 2221: Input check valve

[0075] 2222: Output check valve

[0076] 223: Piston rod

[0077] 2231: Slider

[0078] 2232: L-shaped card slot

[0079] 30: Needle ejection mechanism

[0080] 31: Base

[0081] 311: Activity Room

[0082] 312: Seat plate

[0083] 3121: Joint

[0084] 313: Perforation

[0085] 314: Through hole

[0086] 315: Activity port

[0087] 316: Fixed hook

[0088] 32: Connecting parts

[0089] 321: Connecting base

[0090] 3211: Base wall

[0091] 3212: Needle assembly equipment

[0092] 3213: Needle Room

[0093] 3214: Needle plug hole

[0094] 3215: Cutting edge

[0095] 322: Connector

[0096] 3221: Reduced diameter

[0097] 33: Needle set

[0098] 331: Soft needle

[0099] 332: Needle plug

[0100] 333: Hard needle

[0101] 34: Needle removal operation component

[0102] 341: Needle ejection operating part

[0103] 3411: Button Department

[0104] 3412: Cutting knife

[0105] 342: Needle seat

[0106] 3421: Needle holder head

[0107] 3422: Needle seat connecting rod

[0108] 3423: Connection Department

[0109] 343: Sealing member

[0110] 3431: Sealing gasket

[0111] 3432: Cover

[0112] 344: Spring

[0113] 35: Needle closing operation part

[0114] 351: Pressing part

[0115] 352: Against the inclined surface

[0116] 353: Extension

[0117] 36: Safety cover

[0118] 37: Safety pin

[0119] 38: Push spring

[0120] 40: Driving mechanism

[0121] 41: Shell

[0122] 411: Socket pipe

[0123] 4111: L-shaped card slot

[0124] 412: Shell parts

[0125] 413: Shell parts

[0126] 414: Fixed hook

[0127] 42: Driving parts

[0128] 420: Connection end

[0129] 421: snap-on bump

[0130] 422: Return spring

[0131] 43: Electric drive unit

[0132] 431: Drive components

[0133] 432: Transmission components

[0134] 4321: Transmission rod

[0135] 4322: Gear Set

[0136] 4323: Eccentric Cam

[0137] 44: Control unit

[0138] 441: Control circuit board

[0139] 442: Display Panel

[0140] 443: Control keys

[0141] 444: Contact switch

[0142] 45: Power storage unit

[0143] 46: Electrical connection components DETAILED DESCRIPTION

[0144] The following further describes the technical means adopted by the present invention to achieve the predetermined purpose of the invention in conjunction with the accompanying drawings and preferred embodiments of the present invention.

[0145] As described above, the present invention includes a drive piston assembly of a syringe and a conversion mechanism of the syringe, and the conversion mechanism includes the drive piston assembly. Figure 1 and Figure 2 As shown in the figure, it discloses a preferred embodiment of the conversion mechanism including the driving piston group applied to a syringe. As can be seen from the figure, the syringe defines an X-axis, a Y-axis and a Z-axis which are mutually perpendicular in a three-dimensional space, and defines a front face and a back face on opposite sides of the X-axis direction. The composition structure of the syringe includes a medicine container 10, an injection mold 2 and a driving mechanism 40. Figure 2 In the preferred embodiment shown, the driving piston group 22 and the conversion mechanism 20 of the present invention are part of the injection module 2. The specific structures of the driving piston group 22 and the conversion mechanism 20, as well as the related components in the syringe that are connected to the driving piston group 22 and the conversion mechanism 20 of the present invention are described below.

[0146] like Figures 1 to 3As shown, the medicine container 10 is used to contain and seal 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 for sealing and containing the medicine liquid. The container joint 12 is located on one side of the container body 11 in the Z-axis direction and communicates with the inside of the container body 11. The medicine liquid filled in the container body 11 can be output through the container joint 12. In this preferred embodiment, the medicine container 10 can be provided with a backing film 13 with release paper on the back of the container body 11, so that the medicine container 10 can be pasted on the human body or an object with the backing film 13 after the release paper is torn off; or, the backing film can be replaced with a strap, and the medicine container can be fixed on the human body or an object by the strap. The medicine container 10 can be assembled with the injection mold 2 with the container joint 12.

[0147] like Figure 1 , Figure 2 and Figure 4 As shown, the injection module 2 includes a conversion mechanism 20 and a needle ejection mechanism 30. The conversion mechanism 20 and the needle ejection mechanism 30 can be pre-assembled into a modular structure when leaving the factory, so that the user can quickly combine the injection module 2 with the medicine container 10 and the driving mechanism 40 for use. The back of the injection module 2 can be provided with a backing sheet with release paper, so that it can be attached to a human body or an object with the backing sheet after tearing off the release paper, or a strap is provided on the back of the injection module 2, and the strap is used to replace the backing sheet and fix it to a human body or an object by the strap.

[0148] like Figures 4 to 6 As shown, the conversion mechanism 20 connects the medicine container 10 and the driving mechanism 40. The conversion mechanism 20 includes a conversion connection seat 21 and a driving piston group 22. The conversion connection seat 21 includes an input adapter 213 and an output adapter 214. The input adapter 213 is connected to the medicine container 10, and the output adapter 214 is connected to the needle ejection mechanism 30. In this preferred embodiment, the conversion connection seat 21 also includes a seat body 211 and a valve seat portion 212. The valve seat portion 212 is arranged on the seat body 211. The valve seat portion 212 has a sleeve opening opening facing outward, and the sleeve opening can be assembled with the driving piston group 22. The input adapter 213 is arranged on the side of the valve seat portion 212 opposite to the sleeve opening. The output adapter 214 is arranged in the seat body 211. The input adapter 213 and the output adapter 214 are respectively connected to the sleeve opening of the valve seat portion 212. The input adapter 213 can be detachably connected to the container connector 12 of the medicine container 10, and the output adapter 214 can be connected to the needle removal mechanism 30.

[0149] like Figures 4 to 6As shown, in this preferred embodiment, the sleeve opening of the valve seat portion 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 group 22 is installed at the sleeve opening of the valve seat portion 212. The driving piston group 22 can be controlled to move and can extract the drug liquid in the drug container 10 into the driving piston group 22 through the input adapter 213, and then transfer the drug liquid input into the driving piston group 22 to be output through the output adapter 214. The seat body 211 can also have a connecting plate 215, and the connecting plate 215 is connected and assembled with the needle ejection mechanism 30, wherein the connecting plate 215 forms a clamping portion 216 on the 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 assembled with the needle ejection mechanism 30.

[0150] like Figures 4 to 6 As shown, in this preferred embodiment, the input adapter 213 of the conversion mechanism 20 includes a male connector 2131 and at least one hook 2132, and the container connector 12 of the medicine container 10 includes a female connector 121 and at least one slot 122. By matching the male connector 2131 of the input adapter 213 with the female connector 121 of the container connector 12, and matching the hook 2132 of the input adapter 213 with the slot 122 of the container connector 12, the male connector 2131 and the female connector 121 can be a standardized male Luer taper and a female Luer taper, respectively, and have a minimal leakage-free function after being combined.

[0151] like Figures 4 to 6 As shown, in this preferred embodiment, a back surface of the connecting plate 215 of the seat body 211 of the conversion connecting seat 21 is provided with a back adhesive sheet 218 having a release paper, so that after the release paper is torn off, the back adhesive sheet 218 can be adhered to a human body or an object, or a strap is provided on the back surface of the seat body 211 of the conversion connecting seat 21, and the back adhesive sheet is replaced by the strap, and the conversion connecting seat 21 is fixed to a human body or an object by the strap.

[0152] like Figure 2 , Figures 4 to 6 and Figures 7 to 9As shown, in this preferred embodiment, the driving piston group 22 includes a piston cylinder 221, a valve member 222 and a piston rod 223 that can move linearly along the Y-axis direction in the piston cylinder 221. One end of the piston cylinder 221 has a valve member connecting end 2211, and the piston cylinder 221 has a piston chamber, which 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 member 222 by the valve member connecting end 2211 and is installed in the valve seat portion 212. The valve member 222 has an input check valve 2221 and an output check valve 2222. The input check valve 2221 is correspondingly connected to the input adapter 213, and the input check valve 2222 is connected to the input adapter 213. The one-way valve 2221 can only be opened unidirectionally from the input adapter 213 toward the valve seat 212, the output one-way valve 2222 is correspondingly connected to the output adapter 214, and the output one-way valve 2222 can only be opened unidirectionally from the valve seat 212 toward the output adapter 214. The input adapter 213 and the output adapter 214 of the conversion connection seat 21 can be connected to the piston chamber of the piston cylinder 221 in a controlled manner through the input one-way valve 2221 and the output one-way valve 2222 of the valve member 222, respectively. The piston rod 223 can be installed in the piston cylinder 221 for linear movement along the Y-axis direction, and the piston rod 223 is detachably connected to the drive mechanism 40, so that the piston rod 223 can be driven by the drive mechanism 40.

[0153] like Figures 4 to 6 In the preferred embodiment shown, at least one slide groove 2212 extending along the Y-axis direction is provided in the inner wall of the piston cylinder 221, and at least one slider 2231 is provided on the outer peripheral surface of the piston rod 223. Each slider 2231 is respectively arranged in the slide groove 2212 corresponding to the position, so as to guide 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 clamping groove 2232, so that the piston rod 223 and the driving mechanism 40 can be connected in a rotatable clamping manner, and the piston rod 223 can be driven by the driving mechanism 40.

[0154] like Figure 2 , Figure 4 and Figures 10 to 14 As shown, the needle-exiting mechanism 30 is connected to the conversion mechanism 20 to perform the injection of the drug solution. The needle-exiting mechanism 30 includes a base 31 , a connecting component 32 , a needle assembly 33 , a needle-exiting operating assembly 34 and a needle-retracting operating member 35 .

[0155] like Figures 10 to 14As shown, the base 31 can be assembled with the base body 211 of the conversion mechanism 20, and the base 31 has an active chamber 311 with an opening on the front side facing the X-axis direction, and the active chamber 311 has a seat plate 312 on the back side facing the X-axis direction, and a through hole 313 connected to the active chamber 311 is provided in the seat plate 312. The base 31 has a through hole 314 connected to the active chamber 311 on one side of the active chamber 311 in the Y-axis direction, and an active opening 315 connected to the active chamber 311 is provided on the side of the base 31 facing the conversion mechanism 20. The seat plate 312 is provided with a connecting portion 3121 on both sides of the Y-axis direction. The connecting portion 3121 is correspondingly combined with the clamping portion 216 of the connecting plate 215 of the conversion connecting seat 21 of the conversion mechanism 20, and the hook portion 217 of the connecting plate 215 can be clamped and fixed to the seat plate 312. A fixing hook 316 can also be set on the periphery of the activity chamber 311 of the base 31.

[0156] like Figures 10 to 14 As shown, the connecting component 32 can be movably installed in the active chamber 311 of the base 31 along the X-axis direction, and the connecting component 32 includes a connecting base 321 and a connecting head 322. The connecting base 321 has a base peripheral wall 3211 and a needle assembly installation part 3212 arranged in the base peripheral wall 3211. The needle assembly installation part 3212 has a needle chamber 3213, and the end of the needle assembly installation part 3212 facing the seat plate 312 of the base 31 is provided with a needle plug hole 3214 connected to the needle chamber 3213, and the needle plug hole 3214 corresponds to the seat plate The through hole 313 of the needle plug hole 3214 corresponds to the position of the through hole 313. The connector 322 is arranged on the connecting base 321 and communicates with the needle chamber 3213 in the needle assembly installation part 3212. The connector 322 extends in the Z-axis direction. In this preferred embodiment, one end of the connector 322 connected to the connecting base 321 forms a reduced diameter portion 3221 that is reduced in diameter and can be cut off. The connector 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 conversion mechanism 20. The side of the base peripheral wall 3211 away from the seat plate 312 of the base 31 has at least one cutting edge portion 3215.

[0157] like Figures 10 to 14As shown, the needle assembly 33 can be movably installed in the needle assembly installation part of the connecting component 32 along the X-axis direction, and can be operated to perform the action of taking out and retracting the needle. The needle assembly 33 includes a soft needle 331, a needle plug 332 and a hard needle 333. The soft needle 331 can be movably installed in the needle chamber 3213 of the needle assembly installation part 3212 along the X-axis direction. One end of the soft needle 331 faces the needle plug hole 3214, and the other end of the soft needle 331 is fixedly connected to the needle plug 332. When the soft needle 331 is driven to extend out of the base 31 In the needle-out state outside the seat plate 312, the needle plug 332 can be fixed in the needle plug hole 3214, and the hard needle 333 can be driven to penetrate the needle plug 332 and the soft needle and be out together with the soft needle 331. After the soft needle 331 is out, the hard needle 333 can be driven to detach from the soft needle 331, and the soft needle 331 is connected to the conversion mechanism 20 via the needle chamber 3213 and the connector 322, providing a path for the flow of the drug liquid; in the needle-retracted state, the soft needle 331 can be driven together with the connecting component 32 and recovered into the base 31.

[0158] like Figures 10 to 14 As shown, the needle-extracting operating assembly 34 is installed in the base 31 and can drive the needle assembly 33 to perform the needle-extracting action. The needle-extracting operating assembly 34 includes a needle-extracting operating member 341 , a needle seat 342 , a sealing component 343 and a spring 344 .

[0159] like Figures 10 to 14 As shown, the needle-exiting operating member 341 can be movably installed in the base 31 along the X-axis direction, and the needle-exiting operating member 341 can be buckled and fixed by the fixed buckle 316 of the base 31. The needle-exiting operating member 341 includes a button portion 3411 and a receiving space located on one side of the button portion 3411. The receiving space corresponds to the active chamber 311 of the base 31, that is, the position of the receiving space corresponds to the position of the active chamber 311. The needle-exiting operating member 341 has a cutting knife portion 3412 on one side corresponding to the connector 322, and the cutting knife portion 3412 can be operated to cut the reduced diameter portion 3221 of the connector 322 of the connecting component 32.

[0160] like Figures 10 to 14 As shown, the needle seat 342 is arranged in the active chamber 311 of the needle ejection operating member 341 and is connected to the needle ejection operating member 341. After the needle seat 342 is in the needle ejection state, the needle seat 342 can be separated from the needle ejection operating 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 ejection operating 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 the needle plug 332 of the needle group 33.

[0161] like Figures 10 to 14As shown, in this preferred embodiment, the needle seat 342 and the needle-exiting operating member 341 are integrally formed components, and a connecting portion 3423 that can be cut off is provided between the periphery of the needle seat head end 3421 and the inner wall of the accommodating space of the needle-exiting operating member 341. The connecting portion 3423 is cut off by the cutting blade portion 3215 of the connecting member 32 installed in the base 31, so that the needle seat 342 and the needle-exiting operating member 341 are separated.

[0162] like Figures 10 to 14 As shown, the sealing component 343 is installed in the connecting component 32 in combination with the spring 344, and the sealing component 343 is arranged on the outside of the needle assembly installation part 3212 and covers the needle chamber 3213. The sealing component 343 is tightly sleeved on the outside of the needle seat connecting rod 3422, and the spring 344 is sleeved on the outside of the needle seat connecting rod 3422. The two ends of the spring 344 are respectively connected to the needle seat head end 3421 of the needle seat 342 and the sealing component 343. In the preferred embodiment, the sealing component 343 includes a sealing gasket 3431 and a cover 3432 sleeved on the outside of the sealing gasket 3431, and the cover 3432 provides a position for the spring 344 to abut, and the sealing gasket 3431 is tightly sleeved on the outside of the needle seat connecting rod 3422.

[0163] like Figures 10 to 14 As shown in the figure, when the needle-exit operating member 341 is pressed toward the base 31, the hard needle 333 of the needle group 33 is inserted into the soft needle 331, so the needle-exit operating member 341 drives the needle seat 342 to push the needle group out of the seat plate 312 of the base 31, and at the same time presses the connecting member 32 via the spring 344, so that the connecting member 32 is pressed against the seat plate 312 at the back of the base 31, that is, the soft needle 331 and the hard needle 333 can be combined to pierce the human body until the needle plug 332 is fixed in the needle assembly installation part 321 2, the needle plug hole 3214, the needle ejection operating member 341 is fixed by the fixing hook 316 in the base 31, and the connecting portion 3423 of the periphery of the needle seat 342 is cut off by the cutting edge portion 3215 of the connecting member 32, and the needle seat 342 is automatically pushed outward by the elastic force of the spring 344, and at the same time, the hard needle 333 is driven to be pulled out of the soft needle 331 through the needle seat connecting rod 3422 of the needle seat 342, so that the soft needle 331 is connected to the conversion mechanism 20 through the needle chamber 3213 of the connecting member and the connecting head 322.

[0164] like Figures 10 to 14As shown, the needle-retracting operating member 35 extends from the outer side of the base 31 through the through hole into the active chamber 311. The needle-retracting operating member 35 includes a pressing portion 351, a top-butting inclined surface 352, and an extending portion 353. The pressing portion 351 is located at the outer side of the base 31. The top-butting inclined surface 352 is located at the side where the pressing portion 351 extends into the active chamber 311, and the top-butting inclined surface 352 abuts against the base peripheral wall 3211 of the connecting component 32. The extending portion 353 is located at the side where the pressing portion 351 extends into the active chamber 311 and bypasses the needle assembly installation portion 3212 of the connecting component 32. The end of the extending portion 353 has a limiting hook. By limiting the limiting hook by the base 31, the needle-retracting operating member 35 is installed in the base 31 and can move a limited distance without being separated from the base 31. When the pressing portion 351 of the needle retracting operating member 35 is pressed, the abutting inclined surface 352 can be used to push the connecting component 32 in the base 31 away from the seat plate 312 on the back side of the base 31, thereby driving the connecting component 32 and the soft needle 331 of the needle group 33 inserted in the connecting component 32 to be retracted into the base 31.

[0165] like Fig.10 , Fig.11 and Fig.14 As shown, the needle ejection mechanism 30 may be further provided with a safety cover 36 and a safety pin 37 to ensure the safety of the needle ejection mechanism 30. The safety cover 36 covers the outer side of the needle ejection operating assembly 34 and can be fixed on the base 31. The safety pin 37 is inserted through the safety cover 36 and the needle ejection operating member 341 of the needle ejection operating assembly 34 to be fixed. After the safety pin 37 is removed and the safety cover 36 is removed, the needle ejection mechanism 30 can perform the needle ejection action to ensure the safety of use. In addition, a push-up spring 38 may be provided between the safety cover 36 and the needle ejection operating member 341. After the safety pin 37 is removed, the push-up spring 38 automatically ejects the safety cover 36 from the base 31 to improve the convenience of operation.

[0166] like Figure 1 , Figure 2 and Figure 15 to Figure 16 As shown, the driving mechanism 40 is assembled with the conversion mechanism 20 of the injection mold, and can drive the piston rod 223 in the conversion mechanism 20 to move. 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 conversion mechanism 20 of the injection mold, 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 conversion connection seat 21 of the conversion mechanism 20, and 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.

[0167] like Figure 15 to Figure 16In the preferred embodiment shown, the shell 41 is a hollow body with a space inside. The side of the shell 41 has a sleeve portion 411, and the sleeve portion 411 has an axial hole extending from the outside to the inside of the shell 41. The sleeve portion 411 is detachably mounted on the outside of the piston cylinder 221 of the conversion mechanism 20.

[0168] like Figure 15 to Figure 16 As shown, in this preferred embodiment, the housing 41 is composed of a plurality of housing parts 412, 413 which are screwed, clamped or bonded together. The sleeve tube portion 411 is connected to the piston cylinder 221 in a rotatable clamping manner, wherein a clamping block 2213 is provided on the outer circumference of the piston cylinder 221, and an L-shaped clamping groove 4111 is provided on the sleeve tube portion 411. By combining the clamping block 2213 and the L-shaped clamping groove 4111, the sleeve tube portion 411 is connected to the piston cylinder 221 in a rotatable clamping manner.

[0169] like Figure 15 to Figure 16 Cooperate Figure 8 , Fig. 9 As shown, the driving member 42 can be installed in the sleeve tube portion 411 of the housing 41 in a linear motion, and one end of the driving member 42 facing the sleeve tube portion 411 is a connecting end portion 420, and the connecting end portion 420 is detachably connected to the piston rod 223. In this preferred embodiment, the outer peripheral surface of the connecting end portion 420 of the driving member 42 has at least one clamping protrusion 421, and the driving member 42 can be installed in the piston rod 223, and the clamping protrusion 421 corresponds to the L-shaped clamping groove 2232 of the piston rod 223, so that the piston rod 223 and the driving mechanism 40 are connected in a rotatable clamping manner.

[0170] like Figure 15 to Figure 16 As shown, in this preferred embodiment, the driving mechanism 40 is an electric driving mechanism, but the present invention is not limited thereto. When the driving mechanism 40 is an electric driving mechanism, in addition to the housing 41 and the driving member 42 installed in the housing 41, the driving mechanism 40 also includes an electric driving unit 43 and a control unit 44, or further includes a power storage unit 45.

[0171] like Figure 15 to Figure 16As shown, the electric drive unit 43 is installed in the shell 41 and can be connected to the drive member 42 arranged in the sleeve portion 411 of the shell 41. The electric drive unit 43 includes a drive component 431 and a transmission component 432. The drive component 431 can be an electric drive mechanism including a motor and a pump or other electric rotation drive mechanism. The transmission component 432 connects the drive component 431 and the drive member 42, so that the drive component 431 can drive the drive member 42 via the transmission component 432. In this preferred embodiment, the transmission assembly 432 includes a transmission rod 4321 and a gear set 4322. The transmission rod 4321 is pivotally mounted in the housing 41. The transmission rod 4321 has at least one eccentric cam 4323. The gear set 4322 includes a plurality of meshing gears, and the gear set 4322 is connected between the drive assembly 431 and the transmission rod 4321. The eccentric cam 4323 of the transmission rod 4321 is connected to the other end of the drive member 42 located in the housing 41, and a return spring 422 is installed between the drive member 42 and the housing 41 to combine with the eccentric cam 4323 of the transmission rod 4321 to drive the drive member 42 and the piston rod 223 connected thereto to perform linear reciprocating motion. In this preferred embodiment, the return spring 422 is a compression spring, which is sleeved on the outside of the driving member 42. The other end of the driving member 42 located in the shell 41 has a rest flange, and the two ends of the return spring 422 respectively abut against the rest flanges of the shell 41 and the driving member 42.

[0172] like Figure 15 to Figure 16 As shown, the control unit 44 is installed in the housing 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 is exposed on the front of the housing 41. The display panel 442 can be a general display panel with a display function. The control unit 44 also has at least one control key 443, which is arranged on the front of the housing 41 and located on the side of the display panel 442. The control key 443 is electrically connected to the control circuit board 441, and allows the user to switch, set and operate via the control key 443. Alternatively, the display panel 442 can also be a touch display panel, which can display the working status and has user operation definitions, allowing the user to set and operate on the display panel.

[0173] like Figure 15 to Figure 16As shown, in addition, the control unit 44 further includes at least one contact switch 444, which is disposed on the housing 41 adjacent to the side of the needle ejection mechanism 30 and electrically connected to the control circuit board 441, and when the drive mechanism 40 is connected to the conversion mechanism 20 of the injection module 2, the needle ejection mechanism 30 of the injection module 2 can contact the contact switch 444 to switch the control unit 44 from the closed state to the enabled state. The drive mechanism 40 can also be provided with a fixing hook 414 at a position adjacent to the contact switch 444 of its housing 41, and the base 31 of the needle ejection mechanism 30 is fixed to the housing 41 by the fixing hook 414, so that the drive mechanism 40 is firmly combined with the injection module 2.

[0174] like Figure 15 to Figure 16 As shown, the control unit 44 can be connected to an external power source or to the power storage unit 45, and the external power source or the power storage unit 45 provides the electric energy required for the actuation of the drive mechanism 40. Figure 15 to Figure 16 In the preferred embodiment shown, the driving mechanism 40 further includes a power storage unit 45, which is installed 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 power storage unit, a wired charging power storage unit or other non-chargeable power storage unit (e.g., a battery). Figure 15 to Figure 16 In the preferred embodiment shown, the power storage unit 45 is a rechargeable power storage unit, such as a lithium battery, and the power storage unit 45 is electrically connected to an electrical connection element 46, which is exposed outside the housing 41 and can be connected to an external power source via a connection line to charge the power storage unit 45. The electrical connection element 46 can be a Universal Serial Bus (USB) type electrical connection element or other types of electrical connection elements.

[0175] For the use of the syringe of the present invention, please refer to Fig.17 and Fig.18 As shown, the conversion mechanism 20 and the needle ejection mechanism 30 are pre-assembled into an injection module 2 before leaving the factory. When the user wants to perform a subcutaneous injection, the drug container 10 with the injection drug liquid and the drive mechanism 40 are sequentially assembled to the conversion mechanism 20 of the injection module 2, wherein the drug container 10 is assembled by docking the container joint 12 with the input adapter 213 of the conversion mechanism 20 of the injection module 2, and then the drive mechanism 40 is connected to the conversion mechanism 20, wherein the sleeve tube portion 411 of the drive mechanism 40 is assembled to the piston cylinder 221 of the conversion mechanism 20 in a rotational card connection manner, and at the same time, the drive member is connected to the piston rod 223, and after the injection module 2 rotates to a predetermined position, the needle ejection mechanism 30 contacts the contact switch 444 of the drive mechanism 40, so that the control unit 44 of the drive mechanism 40 is switched from a closed state to an enabled state.

[0176] like Figures 18 to 21 As shown, before injection, the medicine container 10 and the injection module 2 are fixed to the predetermined injection site of the human body by gluing the backing adhesive sheet 13 or tightening the band, and then the safety pin 37 and the safety cover 36 of the needle ejection mechanism 30 of the injection module 2 are removed. Next, the needle ejection operating member 341 of the needle ejection mechanism 30 is pressed to fix the needle ejection operating member 341 on the base 31, and at the same time, the needle assembly 33 is pushed through the needle seat 342, so that the needle assembly 33 extends out of the base 31 and directly penetrates the human body in the manner of the hard needle 333 inserted in the soft needle 331. In addition, the cutting blade 3215 of the connecting component 32 cuts the needle assembly 33. The elastic force of the spring 344 pushes the needle seat 342 at the connection portion 3423 between the needle seat 342 and the needle ejection operating member 341, and the needle seat 342 drives the hard needle 333 to be pulled out from the soft needle 331, and the soft needle 331 remains in the human body, so that the soft needle 331 is connected to the output adapter 214 of the conversion mechanism 20 through the needle chamber 3213 and the connector 322. After that, the user can operate the driving mechanism 40 to drive the driving piston group 22 of the conversion mechanism 20 to move, and then extract the drug liquid from the drug container 10 and transfer it to the needle ejection mechanism 30, and inject it into the human body through the soft needle 331. After the injection is completed, the driving mechanism 40 stops driving the driving piston group 22 of the conversion mechanism 20 to move. In this way, by fixing the syringe on the human body and maintaining the soft needle 331 in the state of piercing the human body, the user can perform injections multiple times at regular intervals through the driving mechanism 40.

[0177] When the medicine liquid in the medicine container 10 is used up, Fig. 22 As shown in FIG. 1 , the user can press the needle retracting operating member 35 of the needle removal mechanism 30, and use the abutting inclined surface 352 of the needle retracting operating member 35 to push the connecting member 32 in the base 31 away from the seat plate 312 on the back of the base 31, and at the same time drive the soft needle 331 of the needle group 33 disposed in the connecting member 32 to be pulled out of the human body and retracted into the base 31 together, as shown in FIG. Fig.23 and Fig.24 As shown, at this time, during the process of the connecting component 32 pushing the top inclined surface 352 of the needle retracting operating member 35, the reduced diameter portion 3221 of the connecting head 322 of the connecting component 32 connecting the conversion mechanism 20 is cut off by the cutting knife portion 3412 of the needle ejecting operating member 341 fixed on the base 31, so that the injection module 2 cannot be reused, thereby ensuring the safety of the use of the syringe. After the syringe is used, the driving mechanism 40 can be removed from the injection module 2 and kept for next use.

[0178] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A syringe drive piston assembly, used in a syringe, characterized in that: The driving piston assembly can be installed in a conversion mechanism of the syringe, and the driving piston assembly can be connected to a driving mechanism; wherein, The driving piston assembly includes a piston cylinder, a valve member and a piston rod; The piston cylinder has a piston chamber, and one end of the piston cylinder has a valve member connecting end; The valve member is arranged in the valve member connecting end of the piston cylinder, and has an input check valve and an output check valve in the valve member. The input check valve can only be opened in one direction toward the piston cylinder, and the output check valve can only be opened in one direction outward from the piston cylinder. The piston rod is installed in the piston cylinder so as to be linearly movable, and the piston rod is detachably connected to the driving mechanism; The driving piston assembly is connected to a medicine container containing medicine liquid and a needle ejection mechanism having a needle assembly through the conversion mechanism, so that the driving mechanism can drive the piston rod in the piston cylinder to pump the medicine liquid in the medicine container to the needle ejection mechanism, and the needle assembly of the needle ejection mechanism performs the injection of the medicine liquid.

2. The drive piston assembly of the syringe according to claim 1, characterized in that: At least one slide groove is arranged in the inner cylinder wall of the piston cylinder, and at least one slider is arranged on the outer peripheral surface of the piston rod. Each slider is arranged in the slide groove corresponding to the position to guide the piston rod to move along a straight line in the piston cylinder.

3. The drive piston assembly of the syringe according to claim 1 or 2, characterized in that: The piston rod is a hollow rod having at least one L-shaped clamping groove. The piston rod can be connected to the driving mechanism in a rotational clamping manner, and the piston rod can be driven by the driving mechanism.

4. A syringe conversion mechanism, used in a syringe, characterized in that: The conversion mechanism can be combined with a needle ejection mechanism having a needle assembly to form an injection module, and the conversion mechanism can be connected to a driving mechanism having a driving member, wherein the conversion mechanism includes a conversion connection seat and a driving piston assembly installed in the conversion connection seat; The conversion connector includes an input adapter and an output adapter; The driving piston assembly includes a piston cylinder, a valve member and a piston rod. The piston cylinder has a piston chamber. One end of the piston cylinder has a valve member connecting end portion. The valve member is installed in the valve member connecting end portion. The valve member has an input one-way valve corresponding to the input adapter and an output one-way valve corresponding to the output adapter. The input one-way valve can only be opened in one direction from the input adapter toward the piston cylinder, and the output one-way valve can only be opened in one direction from the piston cylinder toward the output adapter. The piston rod can be installed in the piston cylinder in a linear motion, and the piston rod can be disassembled to connect the driving member of the driving mechanism. The input adapter of the conversion mechanism can be connected to a medicine container containing medicine liquid, the output adapter can be connected to the needle ejection mechanism, the driving mechanism can drive the piston rod in the piston cylinder to pump the medicine liquid in the medicine container to the needle ejection mechanism, and then the needle group of the needle ejection mechanism performs the injection of the medicine liquid.

5. The syringe conversion mechanism according to claim 4, characterized in that: At least one slide groove is arranged in the inner cylinder wall of the piston cylinder, and at least one slider is arranged on the outer peripheral surface of the piston rod. Each slider is arranged in the slide groove corresponding to the position to guide the piston rod to move along a straight line in the piston cylinder.

6. The syringe conversion mechanism according to claim 4, characterized in that: The piston rod is a hollow rod having at least one L-shaped clamping groove. The piston rod can be connected to the driving mechanism in a rotational clamping manner, and the piston rod can be driven by the driving mechanism.

7. The syringe conversion mechanism according to any one of claims 4 to 6, characterized in that: The conversion connection seat also includes a seat body and a valve seat portion arranged on the seat body, the valve seat portion has a sleeve opening, the input adapter is arranged on a side of the valve seat portion opposite to the sleeve opening, the output adapter is arranged in the seat body, and the input adapter and the output adapter are respectively connected to the sleeve opening.

8. The syringe conversion mechanism according to claim 7, characterized in that: The seat body has a connecting plate, two opposite sides of the connecting plate respectively form a clamping portion, and the connecting plate has a hook portion, so that the connecting plate can be clamped and assembled with the needle-exiting mechanism.

9. The syringe conversion mechanism according to claim 7, characterized in that: The driving mechanism comprises a shell, the driving member is installed in the shell, the side of the shell has a sleeve tube part, the sleeve tube part can be disassembled and sleeved on the outer side of the piston cylinder, and the driving member can be installed in the sleeve tube part for linear movement.

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