Manual needle withdrawal medication device

Abstract

The present invention provides a manual needle withdrawal medication device, comprising: a medication storage device, comprising a medication storage chamber and a piston assembly arranged in the medication storage chamber; an infusion needle, which is connected to the medication storage chamber; an automatic needle insertion device, wherein the automatic needle insertion device fuses a needle insertion pull line through a fuse mechanism, and after the needle insertion elastic pushing component loses the restriction of the pull line, uses its own stored elastic potential energy to achieve automatic needle delivery; an automatic injection device, wherein the automatic injection device fuses an injection pull line through a fuse mechanism, and after the injection elastic pushing component loses the restriction of the pull line, also uses its own stored elastic potential energy to achieve automatic drug delivery; a manual needle withdrawal device, wherein the manual needle withdrawal device comprises a needle withdrawal manual pushing component for pushing the infusion needle out of an injection site, and after the fuse mechanism fuses the needle withdrawal pull line, the needle withdrawal manual pushing component is manually pushed to drive the infusion needle out of the injection site.

Description

Technical Field

[0001] The invention relates to the technical field of medical device design, and in particular to a manual needle-removal and medication device. Background Art

[0002] Adult patients with non-myeloid malignancies are prone to febrile neutropenia when receiving myelosuppressive anticancer drugs. Routine use of sulfopegfilgrastim injection can reduce the incidence of infection manifested by febrile neutropenia. Sulfopegfilgrastim injection is used subcutaneously once within 24-48 hours after the end of each chemotherapy cycle of anti-tumor drugs. Manual infusion of sulfopegfilgrastim injection will cause inconvenience in injection or miss the administration time without the accompaniment of medical staff.

[0003] In the field of medical drug delivery, there are many non-manual drug delivery methods on the market: such as motor drive, memory alloy drive, pressure ceramic drive, and mechanical spring drive, etc., all of which use different drive methods to push the injection piston to deliver the drug. Among them, the needle withdrawal of non-manual drug delivery methods uses an automatic spring release method. However, when the drug is absorbed too quickly and the adverse reactions of the drug occur quickly, the automatic needle withdrawal process is relatively difficult and may delay the treatment time. Summary of the invention

[0004] In view of the problems in the background technology, the present invention provides a manual needle withdrawal medication device, comprising:

[0005] A medicine storage device, comprising a medicine storage cavity and a piston assembly disposed in the medicine storage cavity;

[0006] an infusion needle, connected to the drug storage cavity;

[0007] An automatic needle insertion device, wherein the automatic needle insertion device fuses the needle insertion pull line through a fuse mechanism, and after the needle insertion elastic push component loses the restriction of the pull line, it uses its own stored elastic potential energy to achieve automatic needle insertion;

[0008] An automatic injection device, wherein the automatic injection device fuses the injection pull wire through a fuse mechanism, and the injection elastic push component also uses its own stored elastic potential energy to realize automatic drug delivery after losing the restriction of the pull wire;

[0009] A manual needle withdrawal device, wherein the manual needle withdrawal device includes a manual needle withdrawal pushing component for pushing the infusion needle out of the injection site, and after the fuse mechanism melts the needle withdrawal pull wire, the manual needle withdrawal pushing component is manually pushed to drive the infusion needle out of the injection site.

[0010] In some embodiments, the fuse mechanism includes a first fuse device that fuses the needle insertion pull wire; the first fuse device fuses the needle insertion pull wire, and the needle insertion elastic push component releases elasticity to push the infusion needle to move and penetrate into the injection site.

[0011] In some embodiments, the fuse mechanism includes a second fuse device for melting the injection pull wire; the second fuse device melts the injection pull wire, and the injection elastic pushing assembly releases elasticity to push the injection piston assembly to move, pushing the medicine in the medicine storage chamber into the infusion needle to achieve drug administration.

[0012] In some embodiments, the fuse mechanism includes a third fuse device for fusing the needle withdrawal pull wire; after the third fuse device fuses the needle withdrawal pull wire, the needle withdrawal manual push assembly can be manually pushed to withdraw the infusion needle from the injection site.

[0013] In some embodiments, a control device and a power supply device are also included, and the first fuse device, the second fuse device, the third fuse device, and the power supply device are all connected to the control device; the control device respectively controls the first fuse device, the second fuse device, and the third fuse device to connect to the power supply device to obtain electricity to respectively fuse the needle insertion pull wire, the injection pull wire, and the needle withdrawal pull wire.

[0014] In some embodiments, the injection elastic pushing assembly includes an injection support, an injection push rod and an injection elastic member; the injection push rod is axially movably installed in the injection support, the injection elastic member is arranged between the injection push rod and the injection support, the injection pull wire connects the injection push rod and the injection support, and makes the injection elastic member in an energy storage state; after the injection pull wire is melted, the injection elastic member releases its elasticity, pushes the injection push rod to move toward one side of the medicine storage chamber, and the injection push rod pushes the injection piston assembly to move.

[0015] In some embodiments, the injection push rod extends out of the injection support toward one end of the drug storage cavity and extends into the drug storage cavity, and a push rod sealing ring is sleeved on the end of the injection push rod for sealing with the inner wall of the drug storage cavity.

[0016] In some embodiments, the injection elastic pushing assembly also includes a push rod identification assembly; the push rod identification assembly includes a sensor and an identification piece arranged on the injection push rod, and the sensor is connected to the control device; the sensor identifies the identification piece to identify the moving position of the injection push rod and feeds back to the control device.

[0017] In some embodiments, there is also a prompter connected to the control device, the prompter includes a light signal prompter and / or a sound signal prompter, when the sensor detects that the injection push rod pushes the injection piston to move to the position after the complete drug output in the drug storage chamber, the control device controls the light signal prompter to generate a light signal and / or controls the sound signal prompter to generate a sound signal.

[0018] In some embodiments, the needle insertion elastic push assembly includes a needle insertion and withdrawal bracket, a first guide member, a needle insertion push block, and a needle insertion elastic member. The first guide member is installed on the needle insertion and withdrawal bracket, the needle insertion push block is movably installed on the first guide member, the needle insertion elastic member is arranged between the needle insertion push block and the needle insertion and withdrawal bracket, the needle insertion pull wire connects the needle insertion push block and the needle insertion and withdrawal bracket, and makes the needle insertion elastic member in an energy storage state;

[0019] The infusion needle is connected to the needle insertion push block. After the needle insertion pull wire is melted, the needle insertion elastic member releases its elasticity to push the needle insertion push block to move along the first guide member and drive the infusion needle to penetrate into the injection site.

[0020] In some embodiments, the needle withdrawal manual pushing assembly includes a second guide member, a needle withdrawal push block, a connecting member, and a needle withdrawal button. The second guide member is installed on the needle advance and retreat bracket. The needle withdrawal push block and the connecting member are movably installed on the second guide member. The connecting member is fixedly connected to the needle advance push block. The needle withdrawal pull wire connects the needle withdrawal push block and the connecting member, and the needle withdrawal button is connected to the needle withdrawal push block.

[0021] The infusion needle is also connected to the needle withdrawal push block. After the needle withdrawal pull wire is melted, the needle withdrawal push block is separated from the connecting piece, and the needle withdrawal button is manually pushed to drive the infusion needle to withdraw from the injection site.

[0022] In some embodiments, a hook structure is provided on the needle withdrawal button, and a matching bayonet structure is provided on the needle withdrawal push block, and the hook structure is hooked on the bayonet structure to achieve connection.

[0023] In some embodiments, a shell is also included, and the medicine storage device, infusion needle, automatic injection device, automatic needle insertion device, and manual needle withdrawal device are installed in the shell; a needle withdrawal button guide groove is provided on the shell, and the needle withdrawal button is located on the outside of the shell, and the hook structure extends into the shell through the needle withdrawal button guide groove to be connected with the bayonet structure, and the hook structure can move along the needle withdrawal button guide groove.

[0024] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0025] The manual needle withdrawal and drug administration device provided by the present invention realizes the functions of automatic needle insertion and automatic drug administration through the settings of the automatic needle insertion device and the automatic injection device, and is easy to operate; the manual needle withdrawal function is realized through the setting of the manual needle withdrawal device, so that the needle can be manually withdrawn during the injection process, preventing adverse reactions caused by untimely needle withdrawal in an emergency situation, and can be applicable to a specific drug, sulpegfilgrastim injection.

[0026] At the same time, both the automatic needle insertion device and the automatic injection device use a fuse to fuse the needle insertion pull wire and the injection pull wire. After the needle insertion elastic pushing component and the injection elastic pushing component lose the restriction of the pull wire, they use their own stored elastic potential energy to realize automatic needle insertion and automatic drug pushing. This solution can use a low-capacity power supply device with low power supply requirements. It mainly uses the stored elastic force, and the elastic structure and pull wire structure are simple and low-cost. At the same time, the processing technology is mature and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other features and advantages of the present invention will be more clearly understood through the following detailed description in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A schematic diagram of the disassembly of the manual needle-removal drug-delivery device provided by the present invention;

[0029] Figure 2 It is a schematic diagram of the disassembly of the medicine storage device in the present invention;

[0030] Figure 3 It is a schematic diagram of the interior of the automatic needle insertion device and the manual needle withdrawal device in the present invention;

[0031] Figure 4 It is a front view schematic diagram of the upper cover in the present invention;

[0032] Figure 5 It is a schematic diagram of the back side of the upper cover in the present invention;

[0033] Figure 6 This is a cross-sectional view of the present invention before the drug storage cavity is injected with drugs;

[0034] Figure 7 This is a cross-sectional view of the present invention after the drug storage cavity is injected with drugs;

[0035] Figure 8 It is a cross-sectional view of the present invention after the infusion needle has not been inserted into the injection site;

[0036] Fig. 9 It is a cross-sectional view of the present invention after the infusion needle is inserted into the injection site;

[0037] Fig.10This is a cross-sectional view of the present invention after the drug is injected through the infusion needle. DETAILED DESCRIPTION

[0038] The present invention will be described in more detail below with reference to the accompanying drawings showing embodiments of the present invention. However, the present invention may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are set forth in order to achieve a full and complete disclosure and to enable those skilled in the art to fully understand the scope of the present invention. In these drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] Reference Figure 1-10 The present invention provides a manual needle withdrawal and drug delivery device, comprising a drug storage device 5, an infusion needle 8, an automatic needle insertion device, an automatic injection device 6 and a manual needle withdrawal device; the drug storage device 5 comprises a drug storage chamber and a piston assembly arranged in the drug storage chamber; the infusion needle 8 is connected to the drug storage chamber; the automatic needle insertion device fuses the needle insertion pull wire 26-2 through a fuse mechanism, and the needle insertion elastic pushing component uses its own stored elastic potential energy to achieve automatic needle delivery after losing the restriction of the pull wire; the automatic injection device fuses the injection pull wire 64 through a fuse mechanism, and the injection elastic pushing component also uses its own stored elastic potential energy to achieve automatic drug delivery after losing the restriction of the pull wire; the manual needle withdrawal device comprises a needle withdrawal manual pushing component for pushing the infusion needle 8 to withdraw from the injection site, and after the fuse mechanism fuses the needle withdrawal pull wire 23, the needle withdrawal manual pushing component is manually pushed to drive the infusion needle to withdraw from the injection site.

[0041] The automatic needle insertion device includes a needle insertion elastic pushing component for pushing the infusion needle 8 into the injection site, a needle insertion pull wire 26-2 for fixing the needle insertion elastic pushing component and making it in an energy storage state, and a first fuse device 32-2 for fusing the needle insertion pull wire; the first fuse device 32-2 fuses the needle insertion pull wire 26-2, and the needle insertion elastic pushing component releases elasticity to push the infusion needle 8 to move and pierce the injection site;

[0042] The automatic injection device 6 includes an injection elastic push component arranged opposite to the piston component, an injection pull wire 64 for fixing the injection elastic push component to be in an energy storage state, and a second fuse device 32-3 for fusing the injection pull wire 64; the second fuse device 32-3 fuses the injection pull wire 64, and the injection elastic push component releases its elasticity to push the injection piston component to move, pushing the medicine in the medicine storage cavity into the infusion needle 8, and drug administration is achieved through the infusion needle 8;

[0043] The manual needle withdrawal device includes a manual needle withdrawal pushing component for pushing the infusion needle 8 out of the injection site, a needle withdrawal pull wire 23 for fixing the manual needle withdrawal pushing component, and a third fuse device 32-1 for melting the needle withdrawal pull wire 23; after the third fuse device 32-1 melts the needle withdrawal pull wire 23, the manual needle withdrawal pushing component is manually pushed to drive the infusion needle 8 to withdraw from the injection site.

[0044] The present invention realizes the functions of automatic needle insertion and automatic drug administration by arranging an automatic needle insertion device and an automatic injection device, and is easy to operate; the manual needle withdrawal function is realized by arranging a manual needle withdrawal device, so that the needle can be manually withdrawn during the injection process, preventing adverse reactions caused by untimely needle withdrawal in an emergency situation, and can be applicable to a specific drug, sulpegfilgrastim injection.

[0045] At the same time, both the automatic needle insertion device and the automatic injection device use a fuse to fuse the needle insertion pull wire and the injection pull wire. After the needle insertion elastic pushing component and the injection elastic pushing component lose the restriction of the pull wire, they use their own stored elastic potential energy to realize automatic needle insertion and automatic drug pushing. This solution can use a low-capacity power supply device with low power supply requirements. It mainly uses the stored elastic force, and the elastic structure and pull wire structure are simple and low-cost. At the same time, the processing technology is mature and simple.

[0046] In this embodiment, the fuse mechanism includes a first fuse device 32-2 for fusing the needle insertion pull wire 26-2; the first fuse device 32-2 fuses the needle insertion pull wire 26-2, and the needle insertion elastic push component releases elasticity to push the infusion needle 8 to move and penetrate into the injection site.

[0047] In this embodiment, the fuse mechanism also includes a second fuse device 32-3 for fusing the injection pull wire; the second fuse device 32-3 fuses the injection pull wire 64, and the injection elastic push component releases elasticity to push the injection piston component to move, pushing the medicine in the medicine storage chamber into the infusion needle 8 to achieve drug administration.

[0048] In this embodiment, the fuse mechanism further comprises a third fuse device 32-1 for fusing the needle withdrawal wire 23; after the third fuse device 32-1 fuses the needle withdrawal wire 23, the manual needle withdrawal push assembly can be manually pushed to withdraw the infusion needle 8 from the injection site.

[0049] In this embodiment, the manual needle withdrawal and drug delivery device also includes a control device 3 and a power supply device 1, and the first fuse device 32-2, the second fuse device 32-3, the third fuse device 32-1, and the power supply device 1 are all connected to the control device 3; the control device 3 respectively controls the first fuse device 32-2, the second fuse device 32-3, and the third fuse device 32-1 to connect to the power supply device 1 to obtain electricity to respectively fuse the needle insertion pull wire 26-2, the injection pull wire 64, and the needle withdrawal pull wire 23.

[0050] Among them, the control device 3 can specifically be a circuit board 31 of an MCU chip, and the first fuse device 32-2, the second fuse device 32-3, and the third fuse device 32-1 are arranged on the circuit board 31; of course, in other embodiments, the implementation scheme of the control device 3 is not limited to the above, and it can also be other controllers.

[0051] Among them, the first fuse device 32-2, the second fuse device 32-3, and the third fuse device 32-1 can all be implemented by heating wires, and the power supply device 1 can be specifically implemented by batteries. Of course, in other embodiments, the specific structural forms of the first fuse device 32-2, the second fuse device 32-3, the third fuse device 32-1, and the power supply device 1 can also be adjusted according to specific circumstances, and are not limited here.

[0052] In this embodiment, if Figure 1 As shown in , the medicine storage chamber is a cylindrical structure with an opening at one end, and the piston assembly is installed in the medicine storage chamber through the opening.

[0053] Among them, a drug inlet is provided on the drug storage cavity. For an exemplary embodiment of the drug inlet, please refer to Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. Before using the manual needle withdrawal drug delivery device, the drug to be injected is first injected into the drug storage cavity through the drug injection needle via the drug inlet for storage, so as to facilitate the automatic timed injection of subsequent drugs. Furthermore, a drug inlet seal is provided in the drug inlet to achieve sealing. The drug inlet seal can be specifically implemented by a rubber sealing pad or other structure. There is no limitation here and it can be selected according to the specific situation. When injecting the prepared drug, the injection needle passes through the drug inlet seal and is inserted into the first drug inlet. After the injection is completed, the injection needle is directly pulled out, and the drug inlet seal still has a sealing effect on the first drug inlet.

[0054] The drug storage cavity is provided with a drug outlet. For an exemplary embodiment of the drug outlet, see Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. The drug outlet is used to communicate with the infusion needle 8, and the communication can be achieved through a delivery tube or the like. Under the action of the piston assembly, the drug in the drug storage cavity is delivered from the drug outlet to the infusion needle 8 for administration.

[0055] Among them, the piston assembly includes an injection piston 54 and a connecting rod coaxially connected to the injection piston 54. For exemplary embodiments of the injection piston 54 and the connecting rod, see Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. The injection piston 54 is axially movably installed in the medicine storage chamber. Furthermore, a sealing ring 53 is provided between the injection piston 54 and the inner wall of the medicine storage chamber to achieve sealing to prevent leakage; specifically, a mounting groove is provided on the outer ring of the injection piston 54, and the sealing ring 53 is placed in the mounting groove for installation, and the outer ring of the sealing ring 53 is against the inner wall surface of the medicine storage chamber to achieve a sealing function; the sealing ring 53 can be specifically implemented by an O-ring or other structure, which is not limited here.

[0056] In this embodiment, combined with Figure 1 , 2 5. The injection elastic pushing assembly includes an injection bracket 61, an injection push rod 68 and an injection elastic member 65.

[0057] Specifically, an injection bracket 61 is coaxially arranged behind the drug storage cavity. An exemplary embodiment of the injection bracket 61 can be found in Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. The injection bracket 61 has a space for installing the injection push rod 68. One end of the injection push rod 68 is axially movably installed in the injection bracket 61, and the other end extends out of the injection bracket 61 to push the piston assembly to move; the injection elastic member 65 is arranged between the injection push rod 68 and the injection bracket 6, and the injection pull wire 64 connects the injection push rod 68 and the injection bracket 61. The injection pull wire 64 pulls the injection push rod 68 and the injection bracket 61 so that the injection elastic member 65 is compressed or stretched, so that the injection elastic member 65 stores energy; the second fuse device 32-3 is arranged opposite to the injection pull wire 64. When the injection pull wire 64 is melted by the second fuse device 32-3, the tension between the injection push rod 68 and the injection bracket 61 disappears, and the force applied to the injection elastic member 65 also disappears accordingly. The injection elastic member releases the elastic force and pushes the injection push rod 68 to move toward the side of the medicine storage chamber, and the injection push rod 68 pushes the piston assembly to move.

[0058] Furthermore, the injection elastic member 65 is an injection spring sleeved on the injection push rod 68, and the two ends of the injection spring are respectively connected to the injection push rod 68 and the injection bracket 61, and the injection pull wire 64 pulls the injection push rod 68 and the injection bracket 61 towards each other, so that the injection spring is compressed between the two; the injection elastic pushing component of this structure is simple and compact in construction and easy to assemble; of course, in other embodiments, the injection elastic member 65 can also be in a stretched state to store energy, and the injection elastic member 65 can also use other elastic structures such as spring sheets to store energy, which is not limited here and can be adjusted according to specific circumstances, and is not limited here.

[0059] Furthermore, one end of the injection pull wire 64 extends into the injection push rod 68 and is fixedly connected through a fixing block, and the other end passes around the fixing column 62 of the injection bracket 61 and is fixedly connected to the fixing block 64-1. Figure 6 As shown in ; of course, in other embodiments, the connection method between the injection pull wire 64 and the injection push rod 68 and the injection bracket 61 is not limited to the above description. The above connection method is to facilitate the assembly of the equipment and can be adjusted according to specific circumstances. No limitation is made here.

[0060] Furthermore, the other end of the injection push rod 68 extends into the medicine storage chamber to push the piston assembly, and a push rod sealing ring 66 is sleeved on the end of the injection push rod 68 for sealing with the inner wall of the medicine storage chamber, further preventing the medicine in the medicine storage chamber from leaking out; specifically, a mounting groove 68-2 is provided on a circle of the end of the injection push rod 68, and the push rod sealing ring 66 is installed in the mounting groove 68-2 for fixation.

[0061] Further, such as Figure 2 As shown in , the end of the injection push rod 68 facing the injection piston 54 is also provided with a one-way valve 67, which can be combined with the injection push rod 68 and the push rod sealing ring 66 to form a right-side one-way seal with the medicine storage chamber. The exemplary embodiment of the one-way valve 67 can be found in Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. The injection piston 54, the sealing ring 53 and the medicine storage chamber form a left-side single complete seal; during the injection process, the air can be exhausted from the one-way valve 67, and the one-way valve 67 remains closed at other times, and the external air cannot enter the medicine storage chamber, thereby avoiding the external air from affecting the cleanliness of the medicine storage chamber to ensure the clean space of the medicine storage chamber.

[0062] In this embodiment, refer to Figure 1, the injection elastic push assembly also includes a push rod identification assembly for identifying the position of the injection push rod 68, which is used to determine whether the medicine in the medicine storage chamber has been completely pushed out. The exemplary embodiment of the injection push rod 68 can be found in Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. Specifically, the push rod identification assembly includes a sensor and an identification piece 68-1 provided on the injection push rod, and the sensor is connected to the control device 3; the sensor identifies the push position of the injection push rod 68 by identifying the identification piece 68-1, and feeds back to the control device 3. Among them, the sensor can specifically be an optical sensor, and the identification piece can specifically be an optical transmitter, which is not limited here and can be selected according to the specific situation.

[0063] Furthermore, a reminder connected to the control device 3 is also included, and the reminder includes a light signal reminder and / or an acoustic signal reminder. When the sensor detects that the injection push rod pushes the injection piston to move to the position after the complete drug output in the drug storage chamber, the control device 3 controls the light signal reminder to generate a light signal and / or controls the acoustic signal reminder to generate an acoustic signal to inform that the injection is completed. In this embodiment, preferably, the reminder includes both a light signal reminder and an acoustic signal reminder, and specifically, an alarm light 36 and a buzzer 42 can be used. The embodiment of the exemplary reminder can be found in Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes.

[0064] Of course, in other embodiments, the prompter may only include a light signal prompter, or may only include a sound signal prompter. The specific structures of the light signal prompter and the sound signal prompter are not limited to the above structures, and can be selected according to the specific situation. There is no limitation here. In addition, the implementation method of the prompter is not limited to the light signal prompter and the sound signal prompter, and it can also be a tactile prompter such as a vibrator, which is not limited here.

[0065] In this embodiment, the automatic needle advancing device and the manual needle withdrawing device are installed together to form the needle advancing and withdrawing device 2; Figure 1 and Figure 3 The needle advancing and withdrawing device 2 includes a needle advancing and withdrawing bracket 21, and the automatic needle advancing device and the manual needle withdrawing device are installed on the needle advancing and withdrawing bracket 21.

[0066] Specifically, refer to Figure 3A manual needle withdrawal medication device includes an automatic needle insertion device. An exemplary embodiment of the automatic needle insertion device can be found in Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. The automatic needle insertion device includes a needle insertion elastic push assembly, a needle insertion pull line 26-2, and a first fuse device 32-2; the needle insertion elastic push assembly includes a first guide member 25, a needle insertion push block 26-3, and a needle insertion elastic member 27. The first guide member 25 is installed on the needle insertion and withdrawal bracket 21, and the needle insertion push block 26-3 is movably installed on the first guide member 25. The needle insertion elastic member 27 is arranged between the needle insertion push block 26-3 and the needle insertion and withdrawal bracket 21. The needle insertion pull wire 26-2 connects the needle insertion push block 26-3 and the needle insertion and retraction bracket 21, and puts the needle insertion elastic member 27 in an energy storage state; the infusion needle 8 is connected to the needle insertion push block 26-3. After the needle insertion pull wire 26-2 is melted, the needle insertion elastic member 27 releases its elasticity to push the needle insertion push block 26-3 to move along the first guide member 25, and drives the infusion needle 8 to move so that its needle tip penetrates into the injection site.

[0067] Among them, the first guide member 25 adopts a first guide rod, and the needle insertion push block 26-3 adopts a needle insertion slider mounted on the first guide rod, so that the needle insertion push block 26-3 can move along the first guide rod; of course, in other embodiments, the first guide member can also be a slide rail structure, and the needle insertion push block 26-3 can also be a slider structure installed on the slide rail. There is no limitation here and it can be adjusted according to specific circumstances.

[0068] The needle insertion elastic member 27 is a needle insertion spring sleeved on the first guide rod, and the two ends of the needle insertion spring are respectively connected to the needle insertion push block 26-3 and the needle insertion and withdrawal bracket 21. Under the action of the needle insertion pull line 26-2, the needle insertion spring is compressed between the needle insertion push block 26-3 and the needle insertion and withdrawal bracket 21 to store energy; of course, in other embodiments, the needle insertion elastic member 27 can also be a spring sheet structure, and the needle insertion elastic member 27 can also store energy by stretching and deforming. There is no limitation here, and it can be adjusted according to specific circumstances.

[0069] Specifically, a card slot can be set on the needle insertion push block 26-3, and the infusion needle 8 is partially fixed in the card slot for installation. Of course, in other embodiments, only the connection method between the infusion needle 8 and the needle insertion push block 26-3 can also be adjusted according to specific circumstances, which is not limited here.

[0070] Refer to Figure 3The manual needle withdrawal device includes a manual needle withdrawal push assembly, a needle withdrawal pull wire 23, and a third fuse device 32-1; the manual needle withdrawal push assembly includes a second guide member 29, a needle withdrawal push block 24, a connector, and a needle withdrawal button 43. The second guide member 19 is installed on the needle insertion and withdrawal bracket 21. The needle withdrawal push block 24 and the connector are movably installed on the second guide member 19. The needle withdrawal pull wire 23 connects the needle withdrawal push block 24 and the connector, and the needle withdrawal button 43 is connected to the needle withdrawal push block 24; the connector is fixedly connected to the needle insertion push block 26-3, so that the needle withdrawal push block 24, the connector 210, and the needle withdrawal pull wire 23 form an integral module that can move with the needle insertion push block 26-3. After the needle withdrawal pull wire 23 is fused, the needle withdrawal push block 24 is separated from the connector (that is, separated from the needle insertion leg fastener 26-3), and the needle withdrawal button 43 is manually pushed to drive the infusion needle 8 to withdraw from the injection site.

[0071] Among them, the second guide member 29 adopts a second guide rod, and the needle withdrawal push block 24 adopts a needle advancement slider sleeved on the second guide rod, so that the needle withdrawal push block 24 can move along the second guide rod; the connecting member also adopts a slider structure sleeved on the second guide rod; of course, in other embodiments, the second guide member can also be a slide rail structure, and the needle withdrawal push block and the connecting member can also be a slider structure installed on the slide rail. There is no limitation here and it can be adjusted according to specific circumstances.

[0072] Among them, a hook structure 43 - 1 is arranged on the needle withdrawal button 43 , and a matching bayonet structure is arranged on the needle withdrawal push block 24 , and the hook structure is hooked on the bayonet structure to achieve connection.

[0073] In this embodiment, refer to Figure 1 The manual needle withdrawal medication device also includes a housing, which includes an upper housing 4 and a lower housing 7. The upper housing 4 is covered on the lower housing 7 to form a space for installing various components. The drug storage device 5, the infusion needle 8, the automatic injection device, the automatic needle insertion device, and the manual needle withdrawal device are all installed in the housing. The buzzer 42 is set on the upper housing 4. A transparent window 41-1 is also set on the upper housing 4 at a position corresponding to the drug storage cavity for observing the injection situation.

[0074] Further, see Figure 4-5 A needle withdrawal button guide groove 41-2 is provided on the upper shell 4, and the needle withdrawal button 43 is located outside the shell. The hook structure 43-1 extends into the shell through the needle withdrawal button guide groove 41-2 and is connected to the bayonet structure on the needle withdrawal push block 24, and the hook structure 43-1 can move along the needle withdrawal button guide groove 41-2, and the extension direction of the needle withdrawal button guide groove 41-2 is consistent with the moving direction of the needle withdrawal push block 24.

[0075] In this embodiment, the circuit board 31 is first installed on the bottom of the lower shell 7, and the medicine storage device 5, the automatic injection device 6, the control device 3, the automatic needle insertion device, and the manual needle withdrawal device are respectively installed at corresponding positions on the lower shell 71, and ensure that the second fuse device 32-3 on the circuit board 31 is arranged relative to the injection pull wire 64, the first fuse device 32-2 is arranged relative to the needle insertion pull wire 26-2, and the third fuse device 32-1 is arranged relative to the needle withdrawal pull wire 23, so as to facilitate rapid heating and fusing.

[0076] In this embodiment, an infusion needle guide block 74 is provided on the lower shell 71. The embodiment of the exemplary infusion needle guide block 74 can be found in Chinese patent application 2020114621027, which is incorporated herein by reference for all purposes. A guide hole is provided on the infusion needle guide block 74. The openings at both ends of the guide hole are used for the insertion of the infusion needle 8, and one end of the guide hole is connected to the inside of the shell, and the other end is connected to the outside of the shell; the infusion needle 8 is inserted into the guide hole 79, and moves along the guide hole to extend out of the shell and the guide hole to penetrate the injection site for injection, or moves along the guide hole to retract into the guide hole after the injection is completed. The present invention uses the injection guide block 74 to guide the insertion and withdrawal direction of the infusion needle 8 to ensure that the needle tip of the infusion needle 8 penetrates or withdraws from the injection site at an accurate angle.

[0077] Furthermore, the guide hole in the infusion needle guide block 74 is arranged obliquely relative to the bottom of the lower shell 71, which is conducive to ensuring that the infusion needle 8 penetrates into or withdraws from the injection site in an inclined posture.

[0078] Furthermore, a sealing structure 73 is provided on an opening at one end of the guide hole communicating with the interior of the shell; the sealing structure 73 may specifically be made of sealing silicone, and the infusion needle 8 passes through the sealing silicone to enter the guide hole.

[0079] In this embodiment, an adhesive layer 79 is provided at the bottom of the lower housing 71. For an exemplary embodiment of the adhesive layer 79, see Chinese Patent Application No. 2020114621027, which is incorporated herein by reference for all purposes. The adhesive layer 79 is used to connect the manual needle withdrawal medication device to the injection site. Specifically, the adhesive layer 79 can be a backing adhesive sticker with release paper, which is fixed to the bottom of the lower housing 71 by hot pressing or the like. Of course, in other embodiments, the adhesive layer 79 can also be implemented by other methods, which are not limited here and can be adjusted according to specific circumstances.

[0080] The working principle of the manual needle withdrawal medication device provided by the present invention is further described below:

[0081] The liquid medicine is first injected into the medicine storage cavity through the medicine inlet and the medicine inlet through the pre-filled syringe. Specifically, the needle tip of the pre-filled syringe filled with liquid medicine pierces the seal 56 of the medicine inlet, and the liquid medicine is injected into the medicine storage cavity; in this process, because the infusion needle 8 has a needle tip sealing area, the liquid medicine pushes the injection piston 54 from Figure 6 The position becomes Figure 7 position to complete the injection and storage of the medicine.

[0082] After powering on, the control device 3, under the control of the software, gives an audible and visual prompt through the buzzer 42;

[0083] Then remove the release paper on the adhesive backing and stick the entire manual needle withdrawal drug delivery device on the treated human skin;

[0084] After a certain period of time, the power supply device of the control device 3 supplies power to the first fuse device 32-2 for a short time to generate heat. After the heat is generated, the first fuse device 32-2 fuses the needle insertion wire 26-2, and the needle insertion elastic member 27 pushes the needle insertion push block 26-3 to move. The needle insertion push block 26-3 drives the infusion needle 8 installed thereon to move forward, and the infusion needle 8 is inserted into the subcutaneous part through the guide hole, as shown below Figure 9-10 As shown in;

[0085] After the needle is inserted, the control device 3 controls the power supply device 1 to supply power to the injection heating device 32-3 for a short time after a certain period of time to generate heat. After the injection heating device 32-3 is heated, the injection pull wire 64 is melted, and the injection elastic member 65 pushes the injection push rod 68 to move. The injection push rod 68 pushes the injection piston 54, and the injection piston 54 pushes the liquid medicine through the infusion needle 8 into the human body's subcutaneous tissue to complete the drug administration. Fig.10 At the same time, the sensor 39 identifies whether the position of the identification piece 68-1 on the injection push rod is at the bottom, and the feedback is given to the control device 3, the control device 3 processes the feedback signal, and then the alarm light 36 and the buzzer 42 are sound and light prompts and alarms;

[0086] After the injection is completed, the control device 3 controls the power supply device to supply power to the third fuse device 32-1 for a short time after a certain period of time to generate heat. After the heat is generated, the third fuse device 32-1 melts the needle withdrawal pull wire 23; the needle withdrawal button 43 is manually pushed to push the needle withdrawal push block 24 to move to the left, and the needle withdrawal push block 24 drives the infusion needle 8 to move backward, and the infusion needle 8 returns to its original position through the guide hole, thereby realizing the needle withdrawal from the subcutaneous tissue.

[0087] After the needle is withdrawn, the control device 3 controls the buzzer 42 to give an audible and visual prompt after a certain period of time to remind the user to remove the device from the human body.

[0088] Those skilled in the art will appreciate that the present invention can be implemented in many other specific forms without departing from its own spirit or scope. Although the implementation of the present invention has been described, it should be understood that the present invention should not be limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A manual needle withdrawal medication device, characterized in that: include: A medicine storage device, comprising a medicine storage cavity and a piston assembly disposed in the medicine storage cavity; an infusion needle, connected to the drug storage cavity; An automatic needle insertion device, wherein the automatic needle insertion device fuses the needle insertion pull line through a fuse mechanism, and after the needle insertion elastic push component loses the restriction of the pull line, it uses its own stored elastic potential energy to achieve automatic needle insertion; An automatic injection device, wherein the automatic injection device fuses the injection pull wire through a fuse mechanism, and the injection elastic push component also uses its own stored elastic potential energy to realize automatic drug delivery after losing the restriction of the pull wire; A manual needle withdrawal device, wherein the manual needle withdrawal device includes a manual needle withdrawal pushing component for pushing the infusion needle out of the injection site, and after the fuse mechanism melts the needle withdrawal pull wire, the manual needle withdrawal pushing component is manually pushed to drive the infusion needle out of the injection site.

2. The manual needle withdrawal medication device according to claim 1, characterized in that: The fuse mechanism includes a first fuse device for fusing the needle insertion pull wire; the first fuse device fuses the needle insertion pull wire, and the needle insertion elastic push component releases elasticity to push the infusion needle to move and pierce the injection site.

3. The manual needle withdrawal medication device according to claim 2, characterized in that: The fuse mechanism includes a second fuse device for fusing the injection pull wire; the second fuse device fuses the injection pull wire, and the injection elastic push component releases elasticity to push the piston component to move, pushing the medicine in the medicine storage chamber into the infusion needle to achieve drug administration.

4. The manual needle withdrawal medication device according to claim 3, characterized in that: The fuse mechanism comprises a third fuse device for fusing the needle withdrawal pull wire; after the third fuse device fuses the needle withdrawal pull wire, the infusion needle can be withdrawn from the injection site only by manually pushing the needle withdrawal manual pushing assembly.

5. The manual needle withdrawal medication device according to claim 4, characterized in that: It also includes a control device and a power supply device, and the first fuse device, the second fuse device, the third fuse device, and the power supply device are all connected to the control device; the control device respectively controls the first fuse device, the second fuse device, and the third fuse device to connect to the power supply device to obtain electricity to respectively fuse the needle insertion pull wire, the injection pull wire, and the needle withdrawal pull wire.

6. The manual needle withdrawal medication device according to claim 5, characterized in that: The injection elastic pushing assembly includes an injection bracket, an injection push rod and an injection elastic member; the injection push rod is axially movably installed in the injection bracket, the injection elastic member is arranged between the injection push rod and the injection bracket, the injection pull wire connects the injection push rod and the injection bracket, and makes the injection elastic member in an energy storage state; after the injection pull wire is melted, the injection elastic member releases its elasticity, pushes the injection push rod to move toward one side of the medicine storage chamber, and the injection push rod pushes the piston assembly to move.

7. The manual needle withdrawal medication device according to claim 6, characterized in that: The injection push rod extends out of the injection support toward one end of the medicine storage cavity and extends into the medicine storage cavity, and a push rod sealing ring for sealing with the inner wall of the medicine storage cavity is sleeved on the end of the injection push rod.

8. The manual needle withdrawal medication device according to claim 6, characterized in that: The injection elastic pushing component also includes a push rod identification component; the push rod identification component includes a sensor and an identification piece arranged on the injection push rod, and the sensor is connected to the control device; the sensor identifies the identification piece to identify the moving position of the injection push rod and feeds back to the control device.

9. The manual needle withdrawal medication device according to claim 8, characterized in that: It also includes a prompter connected to the control device, which includes a light signal prompter and / or a sound signal prompter. When the sensor detects that the injection push rod pushes the piston assembly to move to a position after all the drugs in the drug storage chamber are output, the control device controls the light signal prompter to generate a light signal and / or controls the sound signal prompter to generate a sound signal.

10. The manual needle withdrawal medication device according to claim 1 or 2, characterized in that: The needle insertion elastic push assembly includes a needle insertion and withdrawal bracket, a first guide, a needle insertion push block, and a needle insertion elastic member. The first guide is installed on the needle insertion and withdrawal bracket, the needle insertion push block is movably installed on the first guide, the needle insertion elastic member is arranged between the needle insertion push block and the needle insertion and withdrawal bracket, and the needle insertion pull line connects the needle insertion push block and the needle insertion and withdrawal bracket, and makes the needle insertion elastic member in an energy storage state; The infusion needle is connected to the needle insertion push block. After the needle insertion pull wire is melted, the needle insertion elastic member releases its elasticity to push the needle insertion push block to move along the first guide member and drive the infusion needle to penetrate into the injection site.

11. The manual needle withdrawal medication device according to claim 10, characterized in that: The needle withdrawal manual pushing assembly includes a second guide member, a needle withdrawal pushing block, a connecting member, and a needle withdrawal button. The second guide member is installed on the needle advance and retreat bracket. The needle withdrawal pushing block and the connecting member are movably installed on the second guide member. The connecting member is fixedly connected to the needle advance pushing block. The needle withdrawal pull wire connects the needle withdrawal pushing block and the connecting member, and the needle withdrawal button is connected to the needle withdrawal pushing block. The infusion needle is also connected to the needle withdrawal push block. After the needle withdrawal pull wire is melted, the needle withdrawal push block is separated from the connecting piece, and the needle withdrawal button is manually pushed to drive the infusion needle to withdraw from the injection site.

12. The manual needle withdrawal medication device according to claim 11, characterized in that: The needle withdrawal button is provided with a hook structure, and the needle withdrawal push block is provided with a matching bayonet structure, and the hook structure is hooked on the bayonet structure to achieve connection.

13. The manual needle withdrawal medication device according to claim 12, characterized in that: It also includes a shell, and the medicine storage device, infusion needle, automatic injection device, automatic needle insertion device, and manual needle withdrawal device are installed in the shell; a needle withdrawal button guide groove is provided on the shell, and the needle withdrawal button is located on the outside of the shell, and the hook structure extends into the shell through the needle withdrawal button guide groove and is connected to the bayonet structure, and the hook structure can move along the needle withdrawal button guide groove.

Images