Controllable self-destructive intravenous injection device

Abstract

The invention discloses a controllable self-destructive intravenous injection device, which belongs to the technical field of medical instruments and comprises an empty cylinder, a piston piece is sleeved in the empty cylinder, a nipple is arranged at the end part of the empty cylinder, a needle is sleeved on the nipple, and an injection balance component is embedded in the nipple and the empty cylinder. Compared with non-adjustment, the push force needing to act on the piston piece is smaller, the auxiliary effect can be provided for medical staff, and the injection speed of liquid medicine is further slowed down. When the force of pushing the piston piece by hands of the medical staff changes, the rhombic plug can adjust and control the liquid medicine to flow to the circulation space of the nipple through the empty cylinder in a self-adaptive mode, and the injection speed of the liquid medicine is further slowed down. In this way, to a certain extent, liquid medicine injection in unit time is kept constant when medical staff injects liquid medicine to a patient, compared with non-adjustment, thrust needing to act on the piston piece is smaller, the auxiliary effect can be better provided for the medical staff, and the injection speed of the liquid medicine is further slowed down.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a controllable self-destructive intravenous injection device. Background Art

[0002] A syringe is an indispensable tool in medical activities. It can be used to extract various liquid medicines and then inject different liquid medicines to perform various medical procedures according to different therapeutic purposes. Existing syringes generally include a syringe barrel, a needle, a piston block, and a piston rod. The needle is connected to the upper end of the syringe barrel through a connecting sleeve.

[0003] Some invention patents in the field of medical device technology are disclosed in the prior art, among which the invention patent with application number CN202410162654.8 discloses an auxiliary device for subcutaneous injection, which relates to the field of subcutaneous injection technology, including: a clamping unit, when the two clips are clamped at the patient's injection position, the ends of the two clips will stretch the patient's skin, so that the skin at the patient's injection point is pulled upward; when the clamping unit stretches the patient's skin, the auxiliary injection unit applies pressure to the stretched skin, so that an injection plane appears on the patient's skin; a syringe is inserted into the connecting structure and the movement stroke of the syringe is limited, and the direction of the syringe needle tip is pointed to the injection plane through the connecting structure. At the same time, after the syringe needle tip penetrates the patient's skin, the penetration depth of the syringe needle tip is limited, which solves the problem that in traditional injections, patients rely on their personal vision, touch and operating skills to control the depth of the human body's subcutaneous depth. Due to the different skin thicknesses at different injection sites, the needle often fails to penetrate or is positioned incorrectly. This technical solution still has some shortcomings in its application. It is difficult for medical staff to ensure uniform advancement during manual operation of the syringe, and it is easy to push the syringe too quickly, that is, the medical staff suddenly exerts force to cause the liquid medicine in the syringe to be quickly injected into the patient's body. Pushing the syringe too quickly will not only increase the patient's pain and risk, but may also affect the treatment effect and safety.

[0004] Based on this, the present invention designs a controllable self-destructive intravenous injection device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that it is difficult for medical staff to ensure uniform advancement during manual operation of the syringe, and it is easy to push the syringe too quickly, that is, the medical staff suddenly exerts force to cause the liquid medicine in the syringe to be quickly injected into the patient's body. Pushing the syringe too quickly will not only increase the patient's pain and risk, but may also affect the treatment effect and safety. A controllable self-destructive intravenous injection device is proposed to solve the problem that it is difficult to ensure uniform advancement during manual operation of the syringe by medical staff, and it is easy to push the syringe too quickly, that is, the medical staff suddenly exerts force to cause the liquid medicine in the syringe to be quickly injected into the patient's body. Pushing the syringe too quickly will not only increase the patient's pain and risk, but may also affect the treatment effect and safety.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A controllable self-destructive intravenous injection device, comprising an empty barrel, a piston member is sleeved in the empty barrel, a nipple is arranged at the end of the empty barrel, a needle is sleeved on the nipple, an injection balance component is embedded in the nipple and the empty barrel, the injection balance component comprises a sleeve embedded in the inner side of the nipple, a diamond plug is sleeved in the port of the sleeve, the diamond plug is located in the empty barrel and is used to control the flow of liquid medicine flowing into the nipple through the empty barrel, a filter is arranged on the other side of the sleeve, the filter is clamped in the nipple, the end face of the filter is connected to a first elastic support member, and the filter is elastically supported and connected to the sleeve through the first elastic support member; The first elastic support member includes a support sleeve connected to the filter head, a support liner is sleeved in the support sleeve, a support inner shaft is sleeved in the other port of the support sleeve, an end of the support inner shaft is connected to a first support spring, the support inner shaft is elastically supported and connected to the support liner through the first support spring, an annular limit groove is opened on the support inner shaft, a limit ring is sleeved at a position corresponding to the limit groove on the support inner shaft, and the limit ring is clamped on the inner wall of the support sleeve.

[0007] As a further description of the above technical solution: The injection balancing assembly also includes a strength adjustment part, which includes a threaded rod. A threaded groove is provided at the other end of the support liner. The threaded rod is threadedly connected in the threaded groove. The other end of the threaded rod is rotatably connected to the inner bottom of the support sleeve. A driven bevel gear is mounted on the threaded rod.

[0008] As a further description of the above technical solution: The support sleeve and the nipple are clamped with a docking sleeve at a position corresponding to the driven bevel gear, an adjusting rod is rotatably connected inside the docking sleeve, an active bevel gear is sleeved on the end of the adjusting rod, the active bevel gear is meshed with the driven bevel gear, and an adjusting groove is provided at the other end of the adjusting rod.

[0009] As a further description of the above technical solution: The casing is provided with a plurality of folding grooves in an annular array, and extension components are embedded in the plurality of folding grooves. The extension components include a plurality of extension seats, and the plurality of extension seats are respectively embedded in the plurality of folding grooves. An inner support ring is embedded in the inner side of the casing corresponding to the plurality of extension seats, and a support rod is connected to the bottom of the inner support ring, and the other end of the support rod is connected to the inner bottom of the casing; The outer wall of the inner support ring corresponds to multiple extension seats, all of which are connected to a folding cylinder, a folding rod is sleeved in the other end of the folding cylinder, an end of the folding rod is connected to a folding spring, the folding rod is elastically supported and connected to the inner bottom of the folding cylinder through the folding spring, the inner side of the other end of the folding rod is rotatably connected to a first adapter through a first rotating shaft, the first adapter is fixedly connected to the first rotating shaft, a transfer spring is sleeved on the first rotating shaft, the first rotating shaft is elastically transferred to the folding rod through the transfer spring, and the first adapter is connected to the extension seat.

[0010] As a further description of the above technical solution: The inner sides of the multiple extension seats are connected with a downward pressure assembly, and the downward pressure assembly includes a lower pressure plate embedded in the inner side of the sleeve shell, and the circumferential surface of the lower pressure plate is connected with multiple second adapters corresponding to the multiple extension seats, and the second adapter is rotatably connected to a downward pressure rod via a second rotating shaft, and the inner side of the other end of the downward pressure rod is rotatably connected to a third adapter via a third rotating shaft, and the third adapter is connected to the extension seat.

[0011] As a further description of the above technical solution: The bottom of the lower pressure plate is connected to a second elastic support member for elastically supporting it, the second elastic support member includes a support tube connected to the inner bottom of the shell, a support shaft is sleeved in the other end of the support tube, the other end of the support shaft is connected to the bottom of the lower pressure plate, and a second support spring is connected to the support tube, and the support tube is elastically supported at the bottom of the lower pressure plate through the second support spring.

[0012] As a further description of the above technical solution: A dark groove is provided on the top of the extension seat, a piercing assembly is embedded in the dark groove, the piercing assembly includes a piercing anchor rod sleeved in the groove, the end of the piercing anchor rod is connected to a third support spring, and the piercing anchor rod is elastically supported and connected to the bottom of the dark groove through the third support spring; The outer wall of the extension seat is provided with a planting hole corresponding to the damaged anchor rod, and a pin is sleeved in the planting hole. The damaged anchor rod is provided with a pin hole corresponding to the pin, and the end of the pin is located in the pin hole. The other end of the pin is sleeved with a third supporting spring. The pin is elastically supported and connected to the outer wall of the extension seat through the third supporting spring. The other end of the pin is also connected to a rope, and the other end of the rope is connected to the downward pressure rod. In the initial state, the rope is in a loose state.

[0013] As a further description of the above technical solution: A compensation hole is provided on the diamond-shaped plug, and a piercing cone head is sleeved in the compensation hole. Serial holes are provided on the lower pressure plate and the support shaft corresponding to the piercing cone head. The other end of the piercing cone head extends into the support tube through two serial ports. The other end of the piercing cone head is also connected to a fourth support spring, and the piercing cone head is elastically supported and connected to the inner bottom of the support tube through the fourth support spring.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In the present invention, when the force with which the medical staff pushes the piston part changes, the diamond-shaped plug can adaptively adjust the flow space of the medicine liquid through the empty cylinder to the nipple. To a certain extent, when the medical staff injects the medicine liquid into the patient, the injection of the medicine liquid per unit time remains constant. Compared with no adjustment, the thrust acting on the piston part is smaller, which is beneficial to provide auxiliary effects for the medical staff and further slow down the injection speed of the medicine liquid.

[0015] 2. In the present invention, the puncture anchor rod performs a catapult movement under the action of the reset elastic force of the third supporting spring, and the tip of the puncture anchor rod pierces the nipple and gets stuck in the needle, completing the destruction of the nipple and the needle at one time. When the piston moves toward the nipple to the maximum value, the squeezing pressure between the puncture cone head and the piston part gradually increases, and the puncture cone head pierces the rubber plug of the piston part, thereby destroying the piston part, avoiding the injection device from being simply processed and reused, and reducing the risk of cross infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a controllable self-destructive intravenous injection device proposed by the present invention after being disassembled as a whole; Figure 2 A controllable self-destructive intravenous injection device proposed by the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 3 This is a schematic diagram of the structure of a disassembled injection balance component in a controllable self-destructive intravenous injection device proposed by the present invention; Figure 4 This is a schematic structural diagram of a second elastic support member in a controllable self-destructive intravenous injection device proposed by the present invention; Figure 5 A schematic diagram of the structure of a puncture cone head in a controllable self-destructive intravenous injection device proposed by the present invention; Figure 6 This is a schematic diagram of the structure of an extension component in a controllable self-destructive intravenous injection device proposed by the present invention; Figure 7 A controllable self-destructive intravenous injection device proposed by the present invention Figure 6 Schematic diagram of the enlarged structure at point B.

[0017] Legend: 1. Empty cylinder; 2. Nipple; 3. Piston; 4. Needle; 5. Injection balance assembly; 501. Housing; 502. Diamond plug; 503. Filter head; 504. First elastic support member; 5041. Support sleeve; 5042. Support lining; 5043. Support inner shaft; 5044. First support spring; 5045. Limiting ring; 5046. Limiting groove; 505. Strength adjustment member; 5051. Threaded rod; 5052. Driven bevel gear; 5053. Active bevel gear; 5054. Docking sleeve; 5055. Adjusting rod; 6. Folding groove; 7. Extension assembly; 701. Extension seat ;702, inner support ring;703, support rod;704, folding tube;705, folding rod;706, folding spring;707, adapter spring;708, first adapter;8, pressing down assembly;801, pressing down plate;802, second adapter;803, pressing down rod;804, third adapter;805, second elastic support;8051, support tube;8052, support shaft;8053, second support spring;9, piercing assembly;901, piercing anchor rod;902, latch;903, third support spring;904, rope;10, piercing cone head;11, fourth support spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Please see attached Figure 1 -Attached Figure 7 The present invention provides a technical solution: a controllable self-destructive intravenous injection device, comprising an empty barrel 1, a piston member 3 is sleeved in the empty barrel 1, a nipple 2 is arranged at the end of the empty barrel 1, a needle 4 is sleeved on the nipple 2, an injection balance component 5 is embedded in the nipple 2 and the empty barrel 1, the injection balance component 5 comprises a sleeve 501 embedded in the inner side of the nipple 2, a diamond plug 502 is sleeved in the port of the sleeve 501, the diamond plug 502 is located in the empty barrel 1, and is used to control the flow of liquid medicine flowing into the nipple 2 through the empty barrel 1, a filter 503 is arranged on the other side of the sleeve 501, the filter 503 is clamped in the nipple 2, the end face of the filter 503 is connected to the first elastic support member 504, and the filter 503 is elastically supported and connected to the sleeve 501 through the first elastic support member 504; The first elastic support member 504 includes a support sleeve 5041 connected to the filter head 503, a support liner 5042 is sleeved in the support sleeve 5041, a support inner shaft 5043 is sleeved in the other port of the support sleeve 5041, the end of the support inner shaft 5043 is connected to the first support spring 5044, the support inner shaft 5043 is elastically supported and connected to the support liner 5042 through the first support spring 5044, an annular limit groove 5046 is opened on the support inner shaft 5043, a limit ring 5045 is sleeved at the position of the support inner shaft 5043 corresponding to the limit groove 5046, and the limit ring 5045 is clamped on the inner wall of the support sleeve 5041.

[0020] Specifically, the injection balance component 5 also includes a strength adjustment member 505, which includes a threaded rod 5051. The other end of the support liner 5042 is provided with a threaded groove. The threaded rod 5051 is threadedly connected in the threaded groove. The other end of the threaded rod 5051 is rotatably connected to the inner bottom of the support sleeve 5041. A driven bevel gear 5052 is mounted on the threaded rod 5051. A docking sleeve 5054 is clamped at the position corresponding to the driven bevel gear 5052 on the support sleeve 5041 and the nipple 2. An adjusting rod 5055 is rotatably connected in the docking sleeve 5054. The end of the adjusting rod 5055 is provided with an active bevel gear 5053. The active bevel gear 5053 is meshed with the driven bevel gear 5052. An adjusting groove is provided at the other end of the adjusting rod 5055.

[0021] The specific implementation method is as follows: slowly push the piston member 3. Under the push of the piston member 3, the medicine liquid in the empty cylinder 1 slowly flows into the patient's blood vessels. It is difficult for the medical staff to maintain a uniform speed when pushing the piston member 3 by hand. When the instantaneous speed of the medical staff pushing the piston member 3 is faster, the instantaneous flow rate of the medicine liquid flowing into the nipple 2 through the empty cylinder 1 increases, and the internal pressure of the medicine liquid at the connection between the empty cylinder 1 and the nipple 2 increases. Under the push of the medicine liquid, the diamond plug 502 moves toward the nipple 2, and the diamond plug 502 retracts in the support sleeve 5041 through the support inner shaft 5043, and squeezes the first support spring 5044 to deform it, and the diamond plug During the movement of 502 toward the nipple 2, the space for the medicine to flow into the nipple 2 through the empty cylinder 1 will be compressed, so that when the thrust applied to the piston 3 increases, the injection speed of the medicine can be avoided from being accelerated. When the thrust applied by the medical staff on the piston 3 gradually decreases, the first support spring 5044 begins to perform elastic reset movement, and the first support spring 5044 pushes the support inner shaft 5043 to stretch in the support sleeve 5041. The support inner shaft 5043 pushes the diamond plug 502 to move away from the nipple 2 through the sleeve 501. In this process, the flow space for the medicine to flow from the empty cylinder 1 to the nipple 2 increases.

[0022] Specifically, the casing 501 is provided with a plurality of folding grooves 6 in an annular array, and the plurality of folding grooves 6 are embedded with extension components 7, and the extension components 7 include a plurality of extension seats 701, and the plurality of extension seats 701 are respectively embedded in the plurality of folding grooves 6, and an inner support ring 702 is embedded in the inner side of the casing 501 corresponding to the plurality of extension seats 701, and a support rod 703 is connected to the bottom of the inner support ring 702, and the other end of the support rod 703 is connected to the inner bottom of the casing 501; The outer wall of the inner support ring 702 corresponds to multiple extension seats 701, all of which are connected to a folding cylinder 704, and a folding rod 705 is sleeved in the other end of the folding cylinder 704. The end of the folding rod 705 is connected to a folding spring 706, and the folding rod 705 is elastically supported and connected to the inner bottom of the folding cylinder 704 through the folding spring 706. The inner side of the other end of the folding rod 705 is rotatably connected to a first adapter 708 through a first rotating shaft, and the first adapter 708 is fixedly connected to the first rotating shaft. A transfer spring 707 is sleeved on the first rotating shaft, and the first rotating shaft is elastically transferred to the folding rod 705 through the transfer spring 707. The first adapter 708 is connected to the extension seat 701, and the inner sides of multiple extension seats 701 are connected to a downward pressing component 8, which includes a lower pressure plate 801 embedded in the inner side of the sleeve shell 501, and a lower pressure plate 801 is provided on the circumferential surface. Corresponding to the multiple extension seats 701, there are connected a plurality of second adapters 802, the second adapters 802 are rotatably connected to the lower pressure rod 803 through the second rotating shaft, the inner side of the other end of the lower pressure rod 803 is rotatably connected to the third adapter 804 through the third rotating shaft, the third adapter 804 is connected to the extension seat 701, and the bottom of the lower pressure plate 801 is connected to a second elastic support member 805 for elastically supporting it, the second elastic support member 805 includes a support tube 8051 connected to the inner bottom of the sleeve 501, the other end of the support tube 8051 is sleeved with a support shaft 8052, the other end of the support shaft 8052 is connected to the bottom of the lower pressure plate 801, and the support tube 8051 is connected to a second support spring 8053, and the support tube 8051 is elastically supported at the bottom of the lower pressure plate 801 through the second support spring 8053.

[0023] The specific implementation method is:

[0024] Specifically, a dark groove is provided at the top of the extension seat 701, and a piercing assembly 9 is embedded in the dark groove. The piercing assembly 9 includes a piercing anchor rod 901 sleeved in the groove, and the end of the piercing anchor rod 901 is connected to a third supporting spring 903. The piercing anchor rod 901 is elastically supported and connected to the bottom of the dark groove through the third supporting spring 903; An insertion hole is provided on the outer wall of the extension seat 701 corresponding to the puncture anchor rod 901, and a plug 902 is sleeved in the insertion hole. A pin hole is provided on the puncture anchor rod 901 corresponding to the plug 902, and the end of the plug 902 is located in the pin hole. A third supporting spring 903 is sleeved on the other end of the plug 902. The plug 902 is elastically supported and connected to the outer wall of the extension seat 701 through the third supporting spring 903. A rope 904 is also connected to the other end of the plug 902. The other end of the rope 904 is connected to the downward pressure rod 803. In the initial state, the rope 904 is in a loose state.

[0025] The specific implementation method is as follows: the inclination angle between the lower pressure rod 803 and the extension seat 701 changes, the lower pressure rod 803 pulls one end of the rope 904, and the other end of the rope 904 gradually generates tension on the pin 902. Under the action of the tension, the pin 902 stretches in the pin hole, and the puncture anchor rod 901 gradually separates from the pin 902. When the pin 902 is completely separated from the puncture anchor rod 901, the third support spring 903 starts to perform elastic reset movement, and the puncture anchor rod 901 performs an ejection movement under the action of the reset elastic force of the third support spring 903, and the tip of the puncture anchor rod 901 pierces the nipple 2 and is stuck in the needle 4.

[0026] Specifically, a compensation hole is provided on the diamond-shaped plug 502, and a piercing cone head 10 is sleeved in the compensation hole. Corresponding to the piercing cone head 10 are provided with string holes on the lower pressure plate 801 and the support shaft 8052. The other end of the piercing cone head 10 extends into the support tube 8051 through two string ports. The other end of the piercing cone head 10 is also connected to a fourth support spring 11, and the piercing cone head 10 is elastically supported and connected to the inner bottom of the support tube 8051 through the fourth support spring 11.

[0027] The specific implementation method is as follows: when the piston 3 is displaced to the nipple 2 to a maximum value, the squeezing force between the piercing cone head 10 and the piston 3 gradually increases, and the piercing cone head 10 pierces the rubber plug of the piston 3 .

[0028] Working principle, when using: The needle 4 is inserted into the medicine bottle, and the piston 3 is pulled out to absorb the liquid medicine in the medicine bottle from the empty cylinder 1. When the medical staff injects the liquid medicine to the patient, the needle 4 is first inserted into the patient's blood vessel, and then the piston 3 is slowly pushed. Under the push of the piston 3, the liquid medicine in the empty cylinder 1 slowly flows into the patient's blood vessel. It is difficult for the medical staff to maintain a uniform speed when pushing the piston 3 by hand. When the medical staff pushes the piston 3 at a faster instantaneous speed, the instantaneous flow rate of the liquid medicine flowing into the nipple 2 through the empty cylinder 1 increases, and the internal pressure of the liquid medicine at the connection between the empty cylinder 1 and the nipple 2 increases. Under the push of the liquid medicine, the diamond plug 502 moves toward the nipple 2, and the diamond plug 502 retracts in the support sleeve 5041 through the support inner shaft 5043, and squeezes the first support spring 5044 to cause it to deform. In the process of the diamond plug 502 moving toward the nipple 2, it will compress The drug solution flows into the space at the nipple 2 through the empty cylinder 1, so that when the thrust applied to the piston member 3 increases, the injection speed of the drug can be avoided to be accelerated. When the thrust applied by the medical staff on the piston member 3 gradually decreases, the first support spring 5044 starts to perform elastic reset movement, and the first support spring 5044 pushes the support inner shaft 5043 to stretch in the support sleeve 5041. The support inner shaft 5043 pushes the diamond plug 502 to move away from the nipple 2 through the sleeve 501. In this process, the circulation space for the drug solution to flow from the empty cylinder 1 to the nipple 2 increases. Therefore, when the force of the medical staff pushing the piston member 3 changes, the diamond plug 502 can adaptively regulate the circulation space for the drug solution to flow from the empty cylinder 1 to the nipple 2. To a certain extent, the drug solution injection per unit time is kept constant when the medical staff injects the drug solution to the patient; For some special drugs and patient ages, a large injection volume per unit time may easily cause discomfort to the patient. A matching small tool is used to insert the small tool into the adjustment groove, and the adjustment rod 5055 is twisted by the small tool. The adjustment rod 5055 rotates to drive the active bevel gear 5053 to rotate, and the active bevel gear 5053 drives the driven bevel gear 5052, and the driven bevel gear 5052 drives the threaded rod 5051 to rotate in the thread groove. Under the joint action of the threaded rod 5051 and the thread groove, the support lining 5042 is driven to move away from the limit ring 5045, and the first support spring 5044 is gradually expanded under the action of its own elastic force. The overall hardness of the first support spring 5044 is reduced. Therefore, when the diamond plug 502 is displaced toward the nipple 2, compared with no adjustment, the thrust acting on the piston member 3 is smaller, which is beneficial to provide auxiliary effects for medical staff and further slow down the injection speed of the liquid medicine. When the injection of the drug solution is completed, the medical staff presses the piston member 3 hard until the piston member 3 moves to the maximum value in the direction of the nipple 2. During this process, the diamond plug 502 will apply a thrust to the lower pressure plate 801, and the lower pressure plate 801 moves toward the inner support ring 702. Driven by the lower pressure plate 801, the end of the lower pressure rod 803 will also rotate around the second adapter 802 during the movement of the lower pressure plate 801, and the other end of the lower pressure rod 803 will rotate around the third adapter 804. The lower pressure rod 803 applies a lateral thrust to the extension seat 701 through the third adapter 804. Under the action of the lateral thrust, the extension seat 701 gradually moves out of the folding groove 6. When the extension seat 701 is completely moved out of the folding groove 6, the extension seat 701 begins to rotate on the inner side of the end of the folding rod 705 through the first adapter 708, and twists the adapter spring 707 to cause it to deform. During this process, the lower pressure rod 803 and the extension seat 701 are The inclination angle between the seats 701 changes, and the pressing rod 803 pulls one end of the rope 904, and the other end of the rope 904 gradually generates tension on the pin 902. Under the action of the tension, the pin 902 stretches in the pin hole, and the piercing anchor rod 901 gradually separates from the pin 902. When the pin 902 is completely separated from the piercing anchor rod 901, the third supporting spring 903 starts to perform elastic reset movement, and the piercing anchor rod 901 performs ejection movement under the action of the reset elastic force of the third supporting spring 903. The tip of the piercing anchor rod 901 pierces the nipple 2 and is stuck in the needle 4, completing the destruction of the nipple 2 and the needle 4 at one time. When the piston 3 moves toward the nipple 2 to the maximum value, the extrusion pressure between the piercing cone head 10 and the piston 3 gradually increases, and the piercing cone head 10 pierces the rubber plug of the piston 3, thereby destroying the piston 3, avoiding the injection device from being simply processed and reused, and reducing the risk of cross infection.

[0029] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A controllable self-destructive intravenous injection device, comprising an empty barrel (1), a piston member (3) is sleeved in the empty barrel (1), a nipple (2) is arranged at the end of the empty barrel (1), a needle (4) is sleeved on the nipple (2), and the characteristics are: An injection balancing component (5) is embedded in the nipple (2) and the empty cylinder (1), and the injection balancing component (5) comprises a sleeve (501) embedded in the inner side of the nipple (2), a diamond plug (502) is sleeved in the port of the sleeve (501), and the diamond plug (502) is located in the empty cylinder (1) and is used to control the flow of liquid medicine flowing into the nipple (2) through the empty cylinder (1), and a filter (503) is provided on the other side of the sleeve (501), and the filter (503) is clamped in the nipple (2), and the end surface of the filter (503) is connected to a first elastic support member (504), and the filter (503) is elastically supported and connected to the sleeve (501) through the first elastic support member (504); The first elastic support member (504) comprises a support sleeve (5041) connected to the filter head (503); a support liner (5042) is sleeved in the support sleeve (5041); a support inner shaft (5043) is sleeved in the other end of the support sleeve (5041); a first support spring (5044) is connected to the end of the support inner shaft (5043); the support inner shaft (5043) is elastically supported and connected to the support liner (5042) via the first support spring (5044); an annular limiting groove (5046) is provided on the support inner shaft (5043); a limiting ring (5045) is sleeved at a position on the support inner shaft (5043) corresponding to the limiting groove (5046); and the limiting ring (5045) is clamped on the inner wall of the support sleeve (5041).

2. A controllable self-destructive intravenous injection device according to claim 1, characterized in that: The injection balancing assembly (5) further comprises a strength adjusting member (505), wherein the strength adjusting member (505) comprises a threaded rod (5051), a threaded groove is formed at the other end of the support liner (5042), the threaded rod (5051) is threadedly connected in the threaded groove, the other end of the threaded rod (5051) is rotatably connected to the inner bottom of the support sleeve (5041), and a driven bevel gear (5052) is mounted on the threaded rod (5051).

3. A controllable self-destructive intravenous injection device according to claim 2, characterized in that: A docking sleeve (5054) is clamped at a position on the support sleeve (5041) and the nipple (2) corresponding to the driven bevel gear (5052); an adjusting rod (5055) is rotatably connected inside the docking sleeve (5054); an active bevel gear (5053) is sleeved on the end of the adjusting rod (5055); the active bevel gear (5053) is meshed with the driven bevel gear (5052); and an adjusting groove is provided at the other end of the adjusting rod (5055).

4. A controllable self-destructive intravenous injection device according to claim 1, characterized in that: The casing (501) is provided with a plurality of folding grooves (6) in an annular array, and an extension component (7) is embedded in the plurality of folding grooves (6). The extension component (7) comprises a plurality of extension seats (701), and the plurality of extension seats (701) are respectively embedded in the plurality of folding grooves (6). An inner support ring (702) is embedded on the inner side of the casing (501) corresponding to the plurality of extension seats (701), and a support rod (703) is connected to the bottom of the inner support ring (702), and the other end of the support rod (703) is connected to the inner bottom of the casing (501); The outer wall of the inner support ring (702) corresponds to a plurality of extension seats (701) which are all connected to a folding cylinder (704); a folding rod (705) is sleeved in the other end of the folding cylinder (704); the end of the folding rod (705) is connected to a folding spring (706); the folding rod (705) is elastically supported and connected to the inner bottom of the folding cylinder (704) via the folding spring (706); the inner side of the other end of the folding rod (705) is rotatably connected to a first adapter (708) via a first rotating shaft; the first adapter (708) is fixedly connected to the first rotating shaft; a transfer spring (707) is sleeved on the first rotating shaft; the first rotating shaft is elastically transferred to the folding rod (705) via the transfer spring (707); and the first adapter (708) is connected to the extension seat (701).

5. A controllable self-destructive intravenous injection device according to claim 4, characterized in that: The inner sides of the plurality of extension seats (701) are connected to a pressing assembly (8), the pressing assembly (8) comprising a pressing plate (801) embedded in the inner side of the sleeve (501), the circumferential surface of the pressing plate (801) being connected to a plurality of second adapters (802) corresponding to the plurality of extension seats (701), the second adapters (802) being rotatably connected to a pressing rod (803) via a second rotating shaft, the inner side of the other end of the pressing rod (803) being rotatably connected to a third adapter (804) via a third rotating shaft, the third adapter (804) being connected to the extension seat (701).

6. A controllable self-destructive intravenous injection device according to claim 5, characterized in that: The bottom of the lower pressure plate (801) is connected to a second elastic support member (805) for elastically supporting it, and the second elastic support member (805) includes a support tube (8051) connected to the inner bottom of the casing (501), and a support shaft (8052) is sleeved in the other end of the support tube (8051), and the other end of the support shaft (8052) is connected to the bottom of the lower pressure plate (801), and a second support spring (8053) is connected to the support tube (8051), and the support tube (8051) is elastically supported at the bottom of the lower pressure plate (801) through the second support spring (8053).

7. A controllable self-destructive intravenous injection device according to claim 6, characterized in that: A dark groove is formed on the top of the extension seat (701), a piercing assembly (9) is embedded in the dark groove, the piercing assembly (9) comprises a piercing anchor rod (901) sleeved in the groove, the end of the piercing anchor rod (901) is connected to a third supporting spring (903), and the piercing anchor rod (901) is elastically supported and connected to the bottom of the dark groove via the third supporting spring (903); The outer wall of the extension seat (701) is provided with a planting hole corresponding to the puncture anchor rod (901), and a plug (902) is sleeved in the planting hole. The puncture anchor rod (901) is provided with a pin hole corresponding to the plug (902), and the end of the plug (902) is located in the pin hole. The other end of the plug (902) is sleeved with a third support spring (903). The plug (902) is elastically supported and connected to the outer wall of the extension seat (701) through the third support spring (903). The other end of the plug (902) is also connected to a rope (904), and the other end of the rope (904) is connected to the downward pressure rod (803). In the initial state, the rope (904) is in a loose state.

8. The controllable self-destructive intravenous injection device according to claim 1, characterized in that: A compensation hole is provided on the diamond plug (502), and a piercing cone head (10) is sleeved in the compensation hole. String holes are provided on the lower pressure plate (801) and the support shaft (8052) corresponding to the piercing cone head (10). The other end of the piercing cone head (10) passes through two string holes and extends into the support tube (8051). The other end of the piercing cone head (10) is also connected to a fourth support spring (11). The piercing cone head (10) is elastically supported and connected to the inner bottom of the support tube (8051) via the fourth support spring (11).

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