A quantitative dispensing pen-type syringe with a two-way drug suction function
By designing a quantitative dispensing pen syringe with two-way drug absorption function, the problem of drug waste in existing syringes when injecting different drugs is solved, and the precise mixing and injection of the drug solution is achieved.
Patent Information
- Application Number
- CN202411572606.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2044-11-06
AI Technical Summary
The existing pen syringes only have one-way drug absorption function, which leads to the need to mix and prepare the drugs first when injecting different drugs, which can easily lead to waste of drugs.
A quantitative dispensing pen syringe with a two-way drug absorption function is designed. By setting a first injection structure and a second injection structure, the two-way absorption and mixing preparation of the drug liquid are realized.
Through the two-way drug absorption function, it can effectively avoid the waste of drugs caused by excessive drug configuration, and achieve accurate mixing and injection of drug liquids.
Smart Images
Figure CN119215269B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of syringes, and in particular relates to a quantitative dispensing pen-type syringe with a two-way drug suction function. Background Art
[0002] A syringe consists of a syringe with a small hole at the front end and a matching piston core rod. It is used to inject a small amount of liquid into or extract it from areas that are inaccessible by other methods. When the core rod is pulled out, the liquid or gas is sucked in from the small hole at the front end of the syringe, and when the core rod is pushed in, the liquid or gas is squeezed out. Pen syringes are one of the commonly used syringes and are named because of their appearance that is similar to a pen.
[0003] In the prior art, general pen-type syringes only have a one-way drug suction function. When different drugs need to be injected, the existing method is to first mix two different liquid drugs and shake them well to prepare them, and then use a syringe to suck the prepared drugs for injection. This drug preparation and injection method is prone to drug waste due to drug residue. To this end, we provide a quantitative drug dispensing pen-type syringe with a two-way drug suction function to solve the above problems. Summary of the invention
[0004] The purpose of the present invention is to provide a quantitative dispensing pen-type syringe with a two-way drug suction function. Through the specific structural design of the first injection structure and the second injection structure, the problem that the existing pen-type syringe only has a one-way drug suction function is solved. When different drugs need to be injected, the existing method is to first mix and shake two different liquid drugs to achieve preparation, and then use a syringe to absorb the prepared drugs for injection. This drug preparation and injection method is prone to cause drug waste due to drug residue.
[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:
[0006] The present invention is a quantitative dispensing pen-type injector with a two-way drug suction function, comprising a first injection structure and a second injection structure arranged coaxially, wherein the first injection structure is tightly engaged with the second injection structure; wherein the first injection structure comprises a first liquid suction component, wherein the first liquid suction component is externally fixed with a first mixing component coaxially therewith, wherein a liquid suction control component coaxially therewith is slidably arranged inside the first liquid suction component, wherein a first needle is installed at the front end of the first liquid suction component, and by pulling the liquid suction control component, the drug liquid enters the first liquid suction component along the first needle. ; The second injection structure includes a second pipetting component, the second pipetting component is fixedly sleeved externally with a second mixing component coaxial therewith, the second pipetting component is slidably provided with a pipetting control component coaxial therewith, the front end of the second pipetting component is provided with a second needle, and the liquid medicine enters the second pipetting component along the second needle by pulling the pipetting control component; the first mixing component includes a mixing and medicine dispensing box, the mixing and medicine dispensing box is connected to the first pipetting component by a first guide tube, and the end of the first guide tube away from the mixing and medicine dispensing box is arranged close to the first needle.
[0007] The second mixing component includes a mixing and dispensing box, which is connected to the second pipetting component via a second guide tube, and the end of the second guide tube away from the mixing and dispensing box is arranged away from the second needle, and the second pipetting component is connected with a third guide tube close to the second needle, and the end of the third guide tube away from the second needle is connected to the mixing and dispensing box on the first mixing component; the second mixing component also includes a double-point locking portion that moves axially and can be elastically reset, and the double-point locking portion is used to realize the plug-in locking of the pipetting control component on the first injection structure and the pipetting control component on the second injection structure.
[0008] The present invention is further configured such that the first liquid suction component and the second liquid suction component both include a liquid suction injection cylinder, a limiting ring coaxial with the liquid suction injection cylinder is fixedly arranged on the inner wall of the liquid suction injection cylinder, a one-way valve is installed at the front end of the liquid suction injection cylinder on the first liquid suction component, and a first flow switch is installed at the front end of the liquid suction injection cylinder on the second liquid suction component.
[0009] The present invention is further configured such that the first mixing component also includes a first injection gripping cylinder, a first axially extending limiting channel is provided on the peripheral side surface of the first injection gripping cylinder, a first connecting portion coaxially therewith is fixedly mounted away from the opening end of the first injection gripping cylinder, a first mounting opening coaxially therewith is provided inside the first injection gripping cylinder, the liquid imbibing injection cylinder on the first liquid imbibing component is fixedly mounted inside the first mounting opening, the first connecting portion is sleeved on the corresponding liquid imbibing injection cylinder and the two are fixedly connected.
[0010] The present invention is further configured such that the mixing and dispensing box on the first mixing component is installed at an eccentric position inside the first injection gripping cylinder, and a docking guide tube is provided on the peripheral side of the mixing and dispensing box on the first mixing component, and the docking guide tube is provided close to the first guide tube, and the first guide tube is fixedly installed between the corresponding liquid pipetting injection cylinder and the mixing and dispensing box, and a second flow switch is installed on the first guide tube close to the position of the liquid pipetting injection cylinder.
[0011] The present invention is further configured such that the second mixing component also includes a second injection gripping cylinder, the second injection gripping cylinder is snap-fitted with the first injection gripping cylinder, a second axially extending limiting channel is provided on the peripheral side of the second injection gripping cylinder, the first limiting channel is connected to the second limiting channel, the second injection gripping cylinder is fixedly mounted with a second connecting portion coaxial with the second injection gripping cylinder away from its opening end, a second mounting port coaxial with the second injection gripping cylinder is provided inside the second injection gripping cylinder, the liquid imbibing injection cylinder on the second liquid imbibing component is fixedly mounted inside the second mounting port, the second connecting portion is sleeved on the corresponding liquid imbibing injection cylinder and the two are fixedly connected.
[0012] The present invention is further configured such that the mixing and dispensing box on the second mixing component is installed at an eccentric position inside the second injection gripping cylinder, the second guide tube is fixedly installed between the corresponding pipette injection cylinder and the mixing and dispensing box, the third guide tube is fixedly installed between the corresponding pipette injection cylinder and the docking guide tube, a third flow switch is installed on the third guide tube close to the position of the pipette injection cylinder, and the mixing and dispensing box on the first mixing component is tightly clamped with the mixing and dispensing box on the second mixing component.
[0013] The present invention is further configured such that the second injection gripping barrel is fixedly provided with an extended mounting seat away from the opening end, and an axially extending elastic reset member is installed on the extended mounting seat; the double-point locking portion includes a toggle ring slidably sleeved on the outer wall of the first injection gripping barrel, and a linkage member slidably matched with the first limiting channel is fixedly provided on the side surface of the toggle ring, and the linkage member is fixedly connected to the elastic reset member, and a first locking port, a second locking port and a threaded hole are respectively opened on the surface of the linkage member, and the first locking port and the second locking port are both connected to the threaded hole.
[0014] The present invention is further configured as follows: the liquid suction control component includes a liquid suction piston disk, a piston rod coaxial with the liquid suction piston disk is fixedly provided on the surface of the liquid suction piston disk, an axial control member is fixedly provided at one end of the piston rod, a locking portion is fixedly provided on the surface of the axial control member, the locking portion corresponding to the first liquid suction component is adapted to the position of the first locking port, the locking portion corresponding to the second liquid suction component is adapted to the position of the second locking port, and a horizontal locking rod is matched with the internal thread of the threaded channel.
[0015] The present invention has the following beneficial effects:
[0016] 1. The present invention pulls the double-point locking part upward to make the liquid suction control component on the first injection structure pull upward. After the required volume of liquid medicine is sucked into the liquid suction injection cylinder, the entire syringe is turned upside down and the second needle is inserted into another medicine bottle. The second flow switch and the first flow switch are turned on at the same time. Then, the double-point locking part is pushed downward to move it to the position of the liquid suction control component on the second injection structure. The liquid suction control component on the second injection structure is plugged and locked by the double-point locking part. In the process of resetting the double-point locking part, the first liquid in the corresponding liquid suction injection cylinder is sucked out by the liquid suction control component on the first injection structure. The medicine liquid is discharged into the first guide tube, and then flows into the assembled medicine dispensing box through the first guide tube. At the same time, the required volume of the second medicine liquid is sucked into the corresponding suction injection cylinder through the suction control component on the second injection structure. When the suction control component on the first injection structure is reset, the medicine liquid in the assembled medicine dispensing box flows into the suction injection cylinder on the second injection structure through the second guide tube, thereby achieving preliminary mixing of different medicine liquids in the suction injection cylinder on the second injection structure. By mixing and preparing the medicine liquid inside the syringe and then injecting it, the problem of medicine waste caused by excessive medicine configuration can be effectively avoided.
[0017] 2. In the present invention, after closing the first flow switch and the second flow switch and opening the third flow switch, the double-point locking part is pushed downward again to drive the liquid suction control component on the second injection structure to move downward until the liquid suction control component on the second injection structure returns to the initial position. In this process, the liquid in the liquid suction injection cylinder on the second injection structure flows upward along the third guide pipe into the assembled medicine dispensing box through the pushing action, and the mixed liquid in the medicine dispensing box flows downward again through the second guide pipe into the liquid suction injection cylinder on the second injection structure, thereby achieving the re-mixing of different liquid medicines, and then the double-point locking part is controlled again. The resetting drives the liquid suction control component on the second injection structure to be pulled upward. During this process, the mixed medicine in the liquid suction injection cylinder on the second injection structure flows back to the medicine dispensing box along the second guide tube. After the double-point locking part returns to the initial position, the mixed medicine in the medicine dispensing box flows downward through the second guide tube into the liquid suction injection cylinder on the second injection structure again, thus completing the mixing and preparation of different medicines. Finally, the first flow switch is opened and the third flow switch is closed. The pressing action of the liquid suction control component on the second injection structure is realized by pushing the double-point locking part downward, so that the mixed medicine is discharged along the second needle for injection.
[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0020] Figure 1 The schematic diagram is a structural diagram of a quantitative dispensing pen-type syringe with a two-way drug suction function.
[0021] Figure 2 for Figure 1 Schematic diagram of the structure from another angle.
[0022] Figure 3 for Figure 1 Longitudinal structural section view.
[0023] Figure 4 It is a schematic structural diagram of the first injection structure in the present invention.
[0024] Figure 5 for Figure 4 Longitudinal structural cross-sectional view.
[0025] Figure 6 It is a schematic structural diagram of the first mixing component in the present invention.
[0026] Figure 7 for Figure 6 Top view of the structure.
[0027] Figure 8 It is a structural schematic diagram of the second injection structure in the present invention.
[0028] Fig. 9 for Figure 8 Longitudinal structural section view.
[0029] Fig.10 It is a schematic structural diagram of the second mixing component in the present invention.
[0030] Fig.11 for Fig.10 Longitudinal structural section view.
[0031] Fig.12 It is a schematic diagram of the structure of the liquid suction control component in the present invention.
[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0033] 1-first injection structure, 2-second injection structure, 3-first liquid suction component, 301-liquid suction injection cylinder, 302-limiting ring, 303-check valve, 4-first mixing component, 401-mixing medicine box, 402-first guide tube, 403-first injection gripping cylinder, 404-first limiting channel, 405-first connecting part, 406-first installation port, 407-docking guide tube, 408-second flow switch, 5-liquid suction control component, 501-liquid suction piston disk, 502-piston rod, 503-axial control member, 504-locking part, 6-first needle, 7-second liquid aspiration assembly, 701-first flow switch, 8-second mixing assembly, 801-second flow guide tube, 802-third flow guide tube, 803-second injection gripping tube, 804-second limiting channel, 805-second connecting part, 806-second mounting port, 807-third flow switch, 808-extension mounting seat, 809-elastic reset part, 810-sliding ring, 811-linkage part, 812-first locking port, 813-second locking port, 814-threaded hole, 9-second needle, 10-horizontal locking rod. DETAILED DESCRIPTION
[0034] 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.
[0035] For specific embodiment 1, please refer to Figure 1-12 The present invention is a quantitative dispensing pen-type syringe with a two-way drug suction function, comprising a first injection structure 1 and a second injection structure 2 arranged coaxially, the first injection structure 1 and the second injection structure 2 are tightly engaged with each other; wherein the first injection structure 1 comprises a first liquid suction component 3, the first liquid suction component 3 is fixedly sleeved with a first mixing component 4 coaxially therewith on the outside, the first liquid suction component 3 is internally provided with a liquid suction control component 5 coaxially therewith, and a first needle 6 is installed at the front end of the first liquid suction component 3, and the liquid suction control component 5 is pulled and drawn so that the drug liquid enters the first liquid suction component 3 along the first needle 6; the second injection structure 2 comprises a second liquid suction component 7, the second liquid suction component 7 is fixedly sleeved with a second mixing component 8 coaxially therewith on the outside, the second liquid suction component 7 is internally provided with a liquid suction control component 5 coaxially therewith, and a second needle 9 is installed at the front end of the second liquid suction component 7, and the liquid suction control component 5 is pulled and drawn so that the drug liquid enters the second liquid suction component 7 along the second needle 9;
[0036] The first mixing component 4 includes a mixing and dispensing box 401, which is connected to the first liquid pipetting component 3 through a first guide tube 402, and the end of the first guide tube 402 away from the mixing and dispensing box 401 is arranged close to the first needle 6; the second mixing component 8 includes a mixing and dispensing box 401, which is connected to the second liquid pipetting component 7 through a second guide tube 801, and the end of the second guide tube 801 away from the mixing and dispensing box 401 is arranged away from the second needle 9, and the second liquid pipetting component 7 is connected to the position of the second needle 9 with a third guide tube 802, and the end of the third guide tube 802 away from the second needle 9 is connected to the mixing and dispensing box 401 on the first mixing component 4; the second mixing component 8 also includes a double-point locking part that moves axially and can be elastically reset, and the double-point locking part is used to realize the plug-in locking of the liquid pipetting control component 5 on the first injection structure 1 and the liquid pipetting control component 5 on the second injection structure 2.
[0037] In this embodiment of the present invention, the first liquid suction component 3 and the second liquid suction component 7 both include a liquid suction injection cylinder 301, on the inner wall of which a limiting ring 302 coaxial with the liquid suction injection cylinder 301 is fixedly arranged, a one-way valve 303 is installed at the front end of the liquid suction injection cylinder 301 on the first liquid suction component 3, and a first flow switch 701 is installed at the front end of the liquid suction injection cylinder 301 on the second liquid suction component 7. The one-way valve 303 is arranged so that the first needle 6 can only perform the operation of sucking the drug solution, while the first flow switch 701 is arranged so that both the absorption and injection of the drug solution can be realized.
[0038] In this embodiment of the present invention, the first mixing component 4 also includes a first injection gripping cylinder 403, and a first limiting channel 404 extending axially is provided on the circumferential side of the first injection gripping cylinder 403. A first connecting portion 405 coaxial with the first injection gripping cylinder 403 is fixedly installed away from the opening end thereof, and a first mounting port 406 coaxial with the first injection gripping cylinder 403 is provided inside the first injection gripping cylinder 403. The liquid suction injection cylinder 301 on the first liquid suction component 3 is fixedly installed inside the first mounting port 406, and the first connecting portion 405 is sleeved on the corresponding liquid suction injection cylinder 301. The mixing and dispensing box 401 on the first mixing component 4 is installed at an eccentric position inside the first injection holding cylinder 403, and the mixing and dispensing box 401 on the first mixing component 4 is connected to the side surface thereof with a docking guide tube 407, and the docking guide tube 407 is arranged close to the first guide tube 402, and the first guide tube 402 is fixedly installed between the corresponding liquid-imbibing injection cylinder 301 and the mixing and dispensing box 401, and a second flow switch 408 is installed on the first guide tube 402 close to the liquid-imbibing injection cylinder 301.
[0039] In this embodiment of the present invention, the second mixing component 8 also includes a second injection gripping cylinder 803, which is snap-fitted with the first injection gripping cylinder 403. An axially extending second limiting channel 804 is provided on the circumferential side of the second injection gripping cylinder 803. The first limiting channel 404 is connected to the second limiting channel 804, so that the sliding of the double-point locking part between the first limiting channel 404 and the second limiting channel 804 can be ensured. A second connecting part 805 coaxial with the second injection gripping cylinder 803 is fixedly installed away from its open end. A second mounting port 806 coaxial with the second injection gripping cylinder 803 is provided inside. The liquid aspiration injection cylinder 301 on the second liquid aspiration component 7 is fixedly installed inside the second mounting port 806. The second connecting part 805 is sleeved on the corresponding liquid aspiration injection cylinder 301 and the two are fixedly connected.
[0040] The mixing and dispensing box 401 on the second mixing component 8 is installed at an eccentric position inside the second injection holding cylinder 803, the second guide tube 801 is fixedly installed between the corresponding liquid pipetting injection cylinder 301 and the mixing and dispensing box 401, the third guide tube 802 is fixedly installed between the corresponding liquid pipetting injection cylinder 301 and the docking guide tube 407, and a third flow switch 807 is installed on the third guide tube 802 close to the liquid pipetting injection cylinder 301. The mixing and dispensing box 401 on the first mixing component 4 is tightly clamped with the mixing and dispensing box 401 on the second mixing component 8, so that a complete dispensing box can be assembled through the two mixing and dispensing boxes 401.
[0041] After the first needle 6 is inserted into a medicine bottle, the suction control component 5 on the first injection structure 1 is plugged and locked by the double-point locking part, and then the double-point locking part is pushed upward to make the suction control component 5 on the first injection structure 1 pull upward. After the required volume of liquid medicine is sucked into the suction injection cylinder 301, the entire syringe is turned upside down and the second needle 9 is inserted into another medicine bottle. The second flow switch 408 and the first flow switch 701 are turned on at the same time, and then the double-point locking part is pushed downward to move it to the position of the suction control component 5 on the second injection structure 2. The suction control component 5 on the second injection structure 2 is plugged and locked by the double-point locking part. During the resetting process of the double-point locking part, the suction control component 5 on the first injection structure 1 is turned on. The liquid suction control component 5 discharges the first liquid medicine in the corresponding liquid suction injection cylinder 301 into the first guide tube 402, and then flows into the assembled medicine dispensing box through the first guide tube 402. At the same time, the required volume of the second liquid medicine is sucked into the corresponding liquid suction injection cylinder 301 through the liquid suction control component 5 on the second injection structure 2. When the liquid suction control component 5 on the first injection structure 1 is reset, the liquid medicine in the assembled medicine dispensing box flows into the liquid suction injection cylinder 301 on the second injection structure 2 through the second guide tube 801, thereby achieving preliminary mixing of different liquid medicines in the liquid suction injection cylinder 301 on the second injection structure 2, and then the first flow switch 701 and the second flow switch 408 are closed and the third flow switch 807 is opened, and then the liquid suction control component 5 on the second injection structure 2 is reset. The double-point locking part is pushed downward to drive the suction control assembly 5 on the second injection structure 2 to move downward until the suction control assembly 5 on the second injection structure 2 returns to the initial position. In this process, the medicine in the suction injection cylinder 301 on the second injection structure 2 is pushed upward along the third guide tube 802 to flow back into the assembled medicine dispensing box. The mixed medicine entering the medicine dispensing box flows downward again through the second guide tube 801 into the suction injection cylinder 301 on the second injection structure 2, thereby achieving the re-mixing of different medicines. Subsequently, the double-point locking part is controlled to be reset again to drive the suction control assembly 5 on the second injection structure 2 to be pulled upward. In this process, the mixed medicine in the suction injection cylinder 301 on the second injection structure 2 is It flows back to the medicine dispensing box along the second flow guide tube 801. After the double-point locking part returns to the initial position, the mixed medicine in the medicine dispensing box flows downward through the second flow guide tube 801 again into the liquid suction injection cylinder 301 on the second injection structure 2. In this way, the mixing and preparation of different medicines is completed. Finally, the first flow switch 701 is opened and the third flow switch 807 is closed. The pressing action of the liquid suction control component 5 on the second injection structure 2 is realized by pushing the double-point locking part downward. In this way, the mixed medicine is discharged along the second needle 9 for injection. After the configured mixed medicine is completely injected, the plug-in locking relationship between the double-point locking part and the liquid suction control component 5 on the second injection structure 2 is released. Finally, the double-point locking part is controlled to return to the initial position.At this time, the suction control component 5 on the first injection structure 1 and the suction control component 5 on the second injection structure 2 are both in the initial position.
[0042] Specific embodiment 2, on the basis of specific embodiment 1, the second injection gripping cylinder 803 is fixedly provided with an extension mounting seat 808 away from the opening end, and an axially extending elastic reset member 809 is installed on the extension mounting seat 808; the double-point locking portion includes a toggle ring 810 slidably sleeved on the outer wall of the first injection gripping cylinder 403, and a linkage member 811 that slides with the first limiting channel 404 is fixedly provided on the side surface of the toggle ring 810, and the linkage member 811 is fixedly connected to the elastic reset member 809, and the surface of the linkage member 811 is respectively provided with a first locking port 812, a second locking port 813 and a threaded channel 814, and the first locking port 812 and the second locking port 813 are both connected to the threaded channel 814. In the initial state, the linkage member 811 is attached to one end of the first limiting channel 404 close to the first connecting portion 405 (such as Fig.11 As shown in the figure, at this time, the suction control component 5 on the first injection structure 1 and the suction control component 5 on the second injection structure 2 are both in the initial position. When the first needle 6 is inserted into a medicine bottle to absorb the first liquid medicine, the linkage member 811 is specifically pushed upward so that the elastic reset member 809 is compressed. While the linkage member 811 is pushed upward, the suction control component 5 on the first injection structure 1 is pulled upward. When the external force applied to the linkage member 811 is released, the elastic restoring force of the elastic reset member 809 allows the linkage member 811 to slide into the first limiting channel 404 along the second limiting channel 804 and re-attach to the end of the first limiting channel 404 close to the first connecting portion 405 (that is, the linkage member 811 returns to the initial position at this time).
[0043] In this embodiment of the present invention, the liquid suction control component 5 includes a liquid suction piston disk 501, a piston rod 502 coaxial with the liquid suction piston disk 501 is fixedly provided on the surface, an axial control member 503 is fixedly provided at one end of the piston rod 502, a locking portion 504 is fixedly provided on the surface of the axial control member 503, the locking portion 504 corresponding to the first liquid suction component 3 is adapted to the position of the first locking port 812, the locking portion 504 corresponding to the second liquid suction component 7 is adapted to the position of the second locking port 813, and the internal thread of the threaded channel 814 is matched with a horizontal locking rod 10; when the linkage member 811 is pushed upward to make the first Before the liquid suction control component 5 on the injection structure 1 is pulled upward, the locking portion 504 corresponding to the first liquid suction component 3 is loosely fitted in the first locking port 812. After the horizontal locking rod 10 is rotated to make it plug-fit with the locking portion 504 corresponding to the first liquid suction component 3, the linkage 811 is pushed upward to achieve the absorption of the required volume of liquid medicine through the first needle 6; after the required volume of the first liquid medicine is absorbed into the corresponding liquid suction injection cylinder 301, the entire syringe is turned upside down and the second needle 9 is inserted into another medicine bottle, and the linkage 811 is pushed downward to move it to fit the second limit passage The end of the channel 804 is close to the second connecting part 805. At this time, the elastic reset member 809 is compressed to the shortest state, and the locking part 504 corresponding to the second liquid suction component 7 is just fitted in the second locking port 813 with clearance. The liquid suction piston disk 501 corresponding to the first injection structure 1 is just fitted to the bottom of the corresponding limit ring 302. Then, the horizontal locking rod 10 is rotated to make it plug-fit with the locking part 504 corresponding to the second liquid suction component 7. Then, the external force applied to the linkage member 811 is gradually weakened to drive the liquid suction control component 5 on the second injection structure 2 to be pulled upward. When the required volume of liquid is sucked, Then, the second needle 9 is pulled out from the medicine bottle, and then the external force applied to the linkage 811 is completely released to make it completely reset. At this time, the suction piston disk 501 corresponding to the second injection structure 2 is just in contact with the bottom of the corresponding limit ring 302, so that the first kind of medicine liquid sucked can be pressed into the medicine dispensing box, and the first kind of medicine liquid entering the medicine dispensing box flows downward along the second guide tube 801 into the suction injection cylinder 301 on the second injection structure 2 to achieve preliminary mixing; when the prepared mixed medicine liquid is completely injected, the suction piston disk 501 corresponding to the second injection structure 2 returns to the initial position (such as Fig. 9 As shown), the horizontal locking rod 10 is then rotated to release the plug-in fitting relationship between it and the locking portion 504 corresponding to the second liquid suction component 7 (the plug-in fitting relationship between the horizontal locking rod 10 and the locking portion 504 corresponding to the first liquid suction component 3 is still maintained). After the linkage 811 returns to the initial position, the liquid suction piston disk 501 on the first injection structure 1 and the liquid suction piston disk 501 on the second injection structure 2 both return to their initial positions.
[0044] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0045] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. A quantitative dispensing pen-type syringe with a two-way drug suction function, characterized in that: It comprises a first injection structure and a second injection structure which are coaxially arranged, and the first injection structure and the second injection structure are tightly engaged with each other; The first injection structure includes a first liquid suction component, a first mixing component coaxially arranged on the outer fixed sleeve of the first liquid suction component, a liquid suction control component coaxially arranged inside the first liquid suction component, a first needle head installed at the front end of the first liquid suction component, and the liquid medicine enters the first liquid suction component along the first needle head by pulling the liquid suction control component; The second injection structure includes a second liquid suction component, a fixed sleeve outside the second liquid suction component is provided with a second mixing component coaxial with the second liquid suction component, a liquid suction control component coaxial with the second liquid suction component is slidably provided inside the second liquid suction component, a second needle is installed at the front end of the second liquid suction component, and the liquid medicine enters the second liquid suction component along the second needle by pulling the liquid suction control component; The first mixing component includes a mixing and dispensing box, the mixing and dispensing box is connected to the first liquid aspiration component through a first guide tube, and the end of the first guide tube away from the mixing and dispensing box is arranged close to the first needle; The second mixing component includes a mixing and dispensing box, the mixing and dispensing box is connected to the second pipetting component through a second guide tube, and the end of the second guide tube away from the mixing and dispensing box is arranged away from the second needle, and the second pipetting component is connected to the position of the second needle with a third guide tube, and the end of the third guide tube away from the second needle is connected to the mixing and dispensing box on the first mixing component; The second mixing component also includes a double-point locking portion that moves axially and can be elastically reset. The double-point locking portion is used to achieve plug-in locking of the liquid suction control component on the first injection structure and the liquid suction control component on the second injection structure.
2. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 1, characterized in that: The first and second liquid suction components both include a liquid suction injection cylinder, on the inner wall of which a limiting ring coaxial with the cylinder is fixedly arranged, a one-way valve is installed at the front end of the liquid suction injection cylinder on the first liquid suction component, and a first flow switch is installed at the front end of the liquid suction injection cylinder on the second liquid suction component.
3. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 2, characterized in that: The first mixing component also includes a first injection gripping cylinder, a first axially extending limiting channel is provided on the peripheral side of the first injection gripping cylinder, a first connecting portion coaxially with the first injection gripping cylinder is fixedly installed away from the opening end thereof, a first mounting opening coaxially with the first injection gripping cylinder is provided inside the first injection gripping cylinder, the liquid pipetting cylinder on the first liquid pipetting component is fixedly installed inside the first mounting opening, the first connecting portion is sleeved on the corresponding liquid pipetting cylinder and the two are fixedly connected.
4. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 3, characterized in that: The mixing and dispensing box on the first mixing component is installed at an eccentric position inside the first injection holding cylinder. The mixing and dispensing box on the first mixing component is connected to a docking guide tube on the side surface thereof. The docking guide tube is arranged close to the first guide tube. The first guide tube is fixedly installed between the corresponding liquid pipetting injection cylinder and the mixing and dispensing box, and a second flow switch is installed on the first guide tube close to the position of the liquid pipetting injection cylinder.
5. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 4, characterized in that: The second mixing component also includes a second injection gripping cylinder, which is snap-fitted with the first injection gripping cylinder. A second axially extending limiting channel is provided on the peripheral side of the second injection gripping cylinder. The first limiting channel and the second limiting channel are connected. A second connecting portion coaxial with the second injection gripping cylinder is fixedly installed away from the opening end thereof. A second mounting port coaxial with the second injection gripping cylinder is provided inside the second injection gripping cylinder. The liquid suction injection cylinder on the second liquid suction component is fixedly installed inside the second mounting port. The second connecting portion is sleeved on the corresponding liquid suction injection cylinder and the two are fixedly connected.
6. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 5, characterized in that: The mixing and dispensing box on the second mixing component is installed at an eccentric position inside the second injection holding cylinder, the second guide tube is fixedly installed between the corresponding pipette injection cylinder and the mixing and dispensing box, the third guide tube is fixedly installed between the corresponding pipette injection cylinder and the docking guide tube, and a third flow switch is installed on the third guide tube close to the position of the pipette injection cylinder, and the mixing and dispensing box on the first mixing component is tightly clamped with the mixing and dispensing box on the second mixing component.
7. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 6, characterized in that: The second injection gripping barrel is fixedly provided with an extension mounting seat away from the opening end, and an axially extending elastic reset member is installed on the extension mounting seat; the double-point locking part includes a toggle ring slidably sleeved on the outer wall of the first injection gripping barrel, and a linkage member slidably matched with the first limiting channel is fixedly provided on the side surface of the toggle ring, and the linkage member is fixedly connected to the elastic reset member, and a first locking port, a second locking port and a threaded hole are respectively opened on the surface of the linkage member, and the first locking port and the second locking port are both connected to the threaded hole.
8. A quantitative dispensing pen-type injector with a two-way drug suction function according to claim 7, characterized in that: The liquid suction control component includes a liquid suction piston disk, a piston rod coaxial with the liquid suction piston disk is fixedly arranged on the surface, an axial control part is fixedly arranged at one end of the piston rod, a locking part is fixedly arranged on the surface of the axial control part, the locking part corresponding to the first liquid suction component is adapted to the position of the first locking port, the locking part corresponding to the second liquid suction component is adapted to the position of the second locking port, and a horizontal locking rod is matched with the internal thread of the threaded hole.
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