Duplex mixed drug delivery device

Abstract

The utility model relates to the technical field of mixed injectors, and provides a duplex mixed dosing device which comprises a duplex support and a mixing assembly. Two injectors which are arranged side by side are mounted on the duplex bracket; the mixing assembly is arranged on one side of the duplex bracket; the mixing assembly comprises a three-way pipe and a mixing pipe; the three-way pipe is provided with two medicine inlets and a medicine outlet, the two medicine inlets are communicated with injection ports of the two injectors respectively, and the medicine outlet is communicated with the mixing pipe. A spiral rod is arranged in an inner cavity of the mixing pipe and comprises a rod body, a first fin and a second fin, the first fin and the second fin are arranged on the rod body, the first fin and the second fin are spiral in the length direction of the rod body, and the second fin and the first fin are in central symmetry about the central axis of the rod body. According to the duplex mixing dosing device, the spiral rod is arranged in the mixing pipe, so that a bi-component solution flows along the spiral channel in the mixing pipe and is continuously stirred and mixed, and the solutions in the two injectors can be fully mixed.

Description

Technical Field

[0001] The utility model relates to the technical field of mixing syringes, in particular to a dual-chamber mixing administration device. Background Art

[0002] The currently used syringes are mainly single-barrel syringes. With the continuous development of treatment methods in the medical industry, the clinical demand for the mixing of two-component liquids is increasing. The commonly used dual-chamber medicine mixers on the market mainly consist of a syringe, a dual-chamber rack, and a fixed bracket. The mixing of the two-component solution is achieved at the nozzle of the syringe through the pushing action of the syringe. Since there is not enough space for sufficient mixing of the two components, the two-component solution is not evenly mixed, which easily affects the treatment effect. Content of the Utility Model

[0003] The utility model provides a dual-chamber mixing administration device to solve the defect that the solutions of the two components in the existing medicine mixer are not evenly mixed, affecting the treatment effect.

[0004] The utility model provides a dual-chamber mixing administration device, comprising:

[0005] A dual-chamber bracket, on which two syringes arranged side by side are installed;

[0006] A mixing assembly, which is arranged on one side of the dual-chamber bracket; the mixing assembly includes a tee and a mixing tube; the tee is provided with two medicine inlets and one medicine outlet, the two medicine inlets are respectively communicated with the injection ports of the two syringes, and the medicine outlet is communicated with the mixing tube;

[0007] A spiral rod is arranged in the inner cavity of the mixing tube. The spiral rod includes a rod body, a first fin and a second fin arranged on the rod body. The first fin and the second fin are both spiral along the length direction of the rod body, and the second fin and the first fin are centrosymmetric about the central axis of the rod body.

[0008] According to the dual-chamber mixing administration device of the utility model, the first fin and the second fin are both provided with a plurality of them, and the plurality of first fins are arranged at intervals along the length direction of the rod body;

[0009] The second fin and the first fin are arranged in one-to-one correspondence.

[0010] According to the dual-chamber mixing administration device of the utility model, the angle formed by the projections of the two ends of the first fin along the length direction of the rod body on a plane perpendicular to the rod body is greater than 220 degrees and less than or equal to 320 degrees.

[0011] According to the dual - chamber mixing drug delivery device of the present utility model, it further includes a connecting piece, and the three - way pipe is connected to the dual - chamber bracket through the connecting piece.

[0012] According to the dual - chamber mixing drug delivery device of the present utility model, two first installation grooves arranged side by side are provided on the dual - chamber bracket; each of the first installation grooves includes a first groove body and a second groove body, and the first groove body accommodates the injection tube of the syringe.

[0013] The second groove body is arranged at one end of the first groove body, and the second groove body accommodates the protruding structure on the injection tube. The second groove body has two opposite groove walls, and the two groove walls respectively abut against both sides of the protruding structure along the length direction of the syringe.

[0014] According to the dual - chamber mixing drug delivery device of the present utility model, it further includes a clamping piece, and the clamping piece is detachably installed on the dual - chamber bracket and is located between the two second groove bodies.

[0015] Arc - shaped parts adapted to the protruding structure are provided on both sides of the clamping piece, and the two arc - shaped parts respectively extend into the two second groove bodies, and the arc - shaped parts abut against the outer peripheral wall of the protruding structure; at least one end of the arc - shaped part is provided with a limiting stop piece, and the limiting stop piece abuts against one side of the protruding structure.

[0016] According to the dual - chamber mixing drug delivery device of the present utility model, it further includes an adapter, and the adapter is detachably installed on the dual - chamber bracket.

[0017] The adapter has a clamping groove, and two opposite groove walls in the clamping groove are elastic walls, and the clamping groove is clamped on the outer periphery of the injection tube of the syringe.

[0018] According to the dual - chamber mixing drug delivery device of the present utility model, it further includes a push seat, and two second installation grooves are provided on the push seat. The two opposite groove walls of the second installation groove respectively abut against both sides of the push handle of the syringe, and a notch for avoiding the push rod of the syringe is provided on one of the groove walls; the openings of the two second installation grooves respectively face the two opposite sides of the push seat.

[0019] According to the dual - chamber mixing drug delivery device of the present utility model, elastic protrusions corresponding to the second installation grooves one by one are further provided on the push seat.

[0020] The elastic protrusion and the bottom of the second installation groove clamp the outer peripheral wall of the push handle; the elastic protrusion can elastically deform in a direction close to or away from the bottom of the second installation groove.

[0021] According to the dual - chamber mixing drug delivery device of the present utility model, a medicine - discharging flexible tube is connected to one end of the mixing tube far from the three - way pipe.

[0022] The dual - chamber mixing drug delivery device of the present utility model fixes and installs two syringes side by side by setting a dual - chamber bracket. The two syringes are used to contain solutions of different components. At the same time, a mixing assembly is arranged on one side of the dual - chamber bracket. The mixing assembly has a three - way pipe. Two medicine inlet ports of the three - way pipe are respectively communicated with the two syringes to introduce the solutions in the syringes into the mixing pipe. A spiral rod is arranged in the mixing pipe so that the two - component solution flows along the spiral channel in the mixing pipe and is continuously stirred and mixed, enabling the solutions in the two syringes to be fully mixed, effectively solving the defect in the prior art that the solutions of the two components in the mixer are not evenly mixed, affecting the treatment effect. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the dual - chamber mixing drug delivery device provided by the embodiment of the present utility model.

[0025] Figure 2 It is a schematic diagram of the mixing pipe and the spiral rod provided by the embodiment of the present utility model.

[0026] Figure 3 It is one of the schematic diagrams of the spiral rod provided by the embodiment of the present utility model.

[0027] Figure 4 It is another schematic diagram of the spiral rod provided by the embodiment of the present utility model.

[0028] Figure 5 It is a further schematic diagram of the spiral rod provided by the embodiment of the present utility model.

[0029] Figure 6 It is a schematic diagram of the dual - chamber bracket provided by the embodiment of the present utility model.

[0030] Figure 7 It is a schematic diagram of the clamping member provided by the embodiment of the present utility model.

[0031] Figure 8 It is a schematic diagram of the adapter provided by the embodiment of the present utility model.

[0032] Figure 9 It is a schematic diagram of the push seat, the push rod and the push handle provided by the embodiment of the present utility model.

[0033] Figure 10It is a schematic diagram of the screw rod of the second structure of the present utility model.

[0034] Figure 11 It is a schematic diagram of the screw rod of the third structure of the present utility model.

[0035] Figure 12 It is a schematic diagram of the screw rod of the fourth structure of the present utility model.

[0036] Figure 13 It is a schematic diagram of the screw rod of the fifth structure of the present utility model.

[0037] Figure 14 It is a schematic diagram of the screw rod of the sixth structure of the present utility model.

[0038] Figure 15 It is a schematic diagram of the screw rod of the seventh mechanism of the present utility model.

[0039] Reference numerals:

[0040] 1. Dual-chamber mixing administration device;

[0041] 11. Dual-chamber bracket; 111. First installation groove; 1111. First groove body; 1112. Second groove body;

[0042] 112. Clamping part; 1121. Limit stop piece;

[0043] 12. Mixing assembly; 121. Three-way pipe; 122. Mixing pipe; 123. Screw rod; 1231. Rod body; 1232. First fin; 1233. Second fin; 1234. Flat part; 124. Medicine outlet hose;

[0044] 14. Connecting part; 15. Adapter; 151. Clamping groove; 16. Pushing seat; 161. Second installation groove; 162. Elastic protrusion;

[0045] 2. Syringe; 21. Injection tube; 22. Protruding structure; 23. Pushing handle; 24. Pushing rod. Detailed implementation manners

[0046] To make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0047] The following Figures 1 - 15 describes the dual-chamber mixing administration device of the present utility model.

[0048] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 shown, the dual-chamber mixing administration device 1 provided by the present utility model includes: a dual-chamber bracket 11 and a mixing assembly 12. Two syringes 2 arranged side by side are mounted on the dual-chamber bracket 11; the mixing assembly 12 is arranged on one side of the dual-chamber bracket 11; the mixing assembly 12 includes a tee 121 and a mixing tube 122; the tee 121 is provided with two medicine inlets and one medicine outlet, the two medicine inlets are respectively communicated with the injection ports of the two syringes 2, and the medicine outlet is communicated with the mixing tube 122. A screw rod 123 is arranged in the inner cavity of the mixing tube 122, the screw rod 123 includes a rod body 1231 and a first fin 1232 and a second fin 1233 arranged on the rod body 1231, the first fin 1232 and the second fin 1233 are both spiral along the length direction of the rod body 1231, and the second fin 1233 and the first fin 1232 are centrosymmetric about the central axis of the rod body 1231.

[0049] In this embodiment, the dual-chamber bracket 11 mounts and fixes the syringe 2, and the syringe 2 contains a solution of components to be mixed. A mixing assembly 12 is arranged on one side of the dual-chamber bracket 11, the mixing assembly 12 has a tee 121, and the two medicine inlets of the tee 121 are respectively communicated with the medicine inlets of the two syringes 2 so as to synchronously introduce the solutions in the syringes 2 into the tee 121, the medicine outlet of the tee 121 is communicated with the mixing tube 122, and the solutions in the two syringes 2 are introduced into the mixing tube 122 through the tee 121 for mixing.

[0050] Furthermore, a screw rod 123 is arranged in the mixing tube 122 in this embodiment, spiral first fins 1232 and second fins 1233 are arranged on the rod body 1231 of the screw rod 123, the first fins 1232 and the second fins 1233 are centrosymmetric about the central axis of the rod body 1231, the first fins 1232 and the second fins 1233 form a spiral staggered structure on the rod body 1231, and a plurality of spiral channels are formed between the first fins 1232 and the second fins 1233. The solutions in the two syringes 2 will flow along the spiral channels formed between the first fins 1232 and the second fins 1233 after entering the mixing tube 122, and are stirred and mixed by the first fins 1232 and the second fins 1233, so that the solutions in the two syringes 2 can be fully mixed, which is beneficial to improving the therapeutic effect of the finally obtained two-component mixed solution.

[0051] The dual - chamber mixing drug delivery device 1 of the present utility model fixes two syringes 2 side - by - side and installed through setting a dual - chamber bracket 11. The two syringes 2 are used to hold solutions of different components. Meanwhile, a mixing assembly 12 is arranged on one side of the dual - chamber bracket 11. The mixing assembly 12 has a three - way pipe 121. The two medicine inlet ports of the three - way pipe 121 are respectively communicated with the two syringes 2 to introduce the solutions in the syringes 2 into the mixing pipe 122. A screw rod 123 is arranged in the mixing pipe 122, so that the two - component solution flows along the spiral channel in the mixing pipe 122 and is continuously stirred and mixed, enabling the solutions in the two syringes 2 to be fully mixed, effectively solving the defect in the prior art that the solutions of the two components in the mixer are not evenly mixed, affecting the treatment effect.

[0052] In some embodiments, as Figure 2 and Figure 3 shown, both the first fins 1232 and the second fins 1233 are provided with a plurality of them. The plurality of first fins 1232 are arranged at intervals along the length direction of the rod body 1231. The second fins 1233 are arranged in one - to - one correspondence with the first fins 1232.

[0053] In this embodiment, by setting multiple groups of first fins 1232 and second fins 1233, each group of first fins 1232 and second fins 1233 can form a set of spiral channels, enabling the solution entering the mixing pipe 122 to flow along the spiral channels and be stirred and mixed by the first fins 1232 and the second fins 1233. Each set of spiral channels includes multiple channels. By leaving a gap between two first fins 1232, that is, a gap is formed between adjacent sets of spiral channels, the solutions in different channels of the previous set of spiral channels can be mixed with each other in the gap and then flow into the next set of spiral channels, making the solution mixing more sufficient and uniform.

[0054] Optionally, in some embodiments, as Figure 3 、 Figure 4 and Figure 5 shown, the angle formed by the projections of the two ends of the first fin 1232 along the length direction of the rod body 1231 on a plane perpendicular to the rod body 1231 is greater than 220 degrees and less than or equal to 320 degrees.

[0055] In this embodiment, by reasonably setting the angle through which the first fin 1232 spirally extends and turns, while the spiral channels formed by the first fins 1232 and the second fins 1233 can fully mix the two groups of solutions, it is not easy to obstruct or block the flow of the solution, enabling the solution to pass through the mixing pipe 122 more smoothly.

[0056] Specifically, in some embodiments, as Figure 2As shown, a clamping protrusion is provided on the outer peripheral wall of at least one end of the rod body 1231, and a groove is provided in the mixing tube 122 corresponding to the clamping protrusion. The clamping protrusion is clamped in the groove to fix the screw rod 123 in the mixing tube 122.

[0057] Optionally, in some embodiments, as Figure 1 shown, the dual mixing administration device 1 further includes a connecting member 14, and the tee tube 121 is connected to the dual bracket 11 through the connecting member 14.

[0058] In this embodiment, by providing the connecting member 14 to connect and fix the tee tube 121 and the dual bracket 11, it is convenient to fix the relative positions of the tee tube 121 and the dual bracket 11, so that the tee tube 121 can better align with the two syringes 2, so that the user can connect the injection ports of the tee tube 121 and the two syringes 2; at the same time, it can also prevent the tee tube 121 from falling off the syringe 2, with a simple structure and convenient use.

[0059] Further, the connecting member 14 is movably connected to the dual bracket 11, and the connecting member 14 can move along the length direction of the syringe 2 to adjust the distance between the medicine inlet and the dual bracket 11.

[0060] In this embodiment, by movably arranging the connecting member 14 on the dual bracket 11, the position of the connecting member 14 can be adjusted along the length direction of the syringe 2, so that the user can adjust the distance between the medicine inlet and the dual bracket 11 according to the length of the syringe 2, so that the dual mixing administration device 1 can be suitable for installing syringes 2 of different length specifications, and the medicine inlet can communicate with the injection port of the syringe 2.

[0061] In a specific embodiment, the connecting member 14 is a connecting rod, and a plurality of clamping portions are provided on the connecting rod along the length direction. A clamping hole is provided on the dual bracket 11, and a notch is provided on the side wall of the clamping hole. The connecting rod is clamped in the clamping hole through any one of the clamping portions.

[0062] Specifically, in some embodiments, as Figure 1 and Figure 6 shown, two first mounting grooves 111 arranged side by side are provided on the dual bracket 11. Each first mounting groove 111 includes a first groove body 1111 and a second groove body 1112. The first groove body 1111 accommodates the injection tube 21 of the syringe 2. The second groove body 1112 is provided at one end of the first groove body 1111. The second groove body 1112 accommodates the protruding structure 22 on the injection tube 21. The second groove body 1112 has two opposite groove walls, and the two groove walls respectively abut against both sides of the protruding structure 22 along the length direction of the syringe 2.

[0063] In this embodiment, the two first mounting grooves 111 are respectively used for mounting two syringes 2. Specifically, the injection tube 21 of the syringe 2 is mounted in the first groove body 1111. It can be understood that a protruding structure 22 for the convenience of the user's operation is usually provided on the outer peripheral wall of the injection tube 21; the protruding structure 22 is arranged in the second groove body 1112, and the two groove walls of the second groove body 1112 respectively abut against both sides of the protruding structure 22 to limit the protruding structure 22 and prevent the syringe 2 from sliding relative to the first mounting groove 111.

[0064] In some embodiments, as Figure 1 and Figure 7 shown, the dual - connection mixing administration device 1 further includes a clamping member 112. The clamping member 112 is detachably mounted on the dual - connection bracket 11 and is located between the two second groove bodies 1112. Arc - shaped portions adapted to the protruding structure 22 are provided on both sides of the clamping member 112. The two arc - shaped portions respectively extend into the two second groove bodies 1112, and the arc - shaped portion abuts against the outer peripheral wall of the protruding structure 22.

[0065] In this embodiment, by mounting the clamping member 112 on the dual - connection bracket 11, the arc - shaped portions on both sides of the clamping member 112 extend into the second groove body 1112, and the arc - shaped portion fits and abuts against the outer peripheral wall of the protruding structure 22 in the second groove body 1112, so as to cooperate with the first mounting groove 111 to limit the syringe 2 and prevent the syringe 2 from shaking in the first mounting groove 111.

[0066] Specifically, in some embodiments, one of the dual - connection bracket 11 and the clamping member 112 is provided with a mounting post, and the other is provided with a mounting hole corresponding to the mounting post. The dual - connection bracket 11 and the clamping member 112 are connected together by inserting the mounting post into the mounting hole.

[0067] In some embodiments, as Figure 7 shown, at least one end of the arc - shaped portion is provided with a limiting flap 1121, and the limiting flap 1121 abuts against one side of the protruding structure 22.

[0068] In this embodiment, by providing a limiting flap 1121 at one end of the arc - shaped portion, when the arc - shaped portion abuts against the outer peripheral wall of the protruding structure 22, the limiting flap 1121 can abut against one side of the protruding structure 22. Correspondingly, the groove wall on one side of the second groove body 1112 abuts against the other side of the protruding structure 22. The limiting flap 1121 and the groove wall of the second groove body 1112 can cooperate with each other to clamp the protruding structure 22, further limit the protruding structure 22, and thus realize the limitation of the entire syringe 2.

[0069] In some embodiments, as Figure 1 and Figure 8As shown in the figure, the dual-chamber mixed dosing device 1 further includes an adapter 15, which is detachably mounted on the dual-chamber bracket 11. The adapter 15 has a clamping groove 151, and the two opposite groove walls in the clamping groove 151 are elastic walls. The clamping groove 151 is clamped around the outer periphery of the syringe tube 21 of the syringe 2.

[0070] In this embodiment, by providing the adapter 15 with a clamping groove 151, the syringe 2 can be clamped in the clamping groove 151 to fix the syringe 2. At the same time, the two opposite groove walls of the clamping groove 151 are elastic walls with a certain elasticity. When the diameter of the syringe tube 21 of the syringe 2 is greater than the distance between the two groove walls, they can deform to both sides to accommodate and clamp the syringe tube 21. The adapter 15 of this embodiment can clamp syringes 2 of different specifications within a certain range, with a wide range of applications.

[0071] At the same time, the adapter 15 is detachably mounted on the dual-chamber bracket 11. When in use, the user can first remove the adapter 15, engage the adapter 15 and the syringe 2 with each other, and then mount the adapter 15 on the dual-chamber bracket 11 to facilitate the user to install the syringe 2.

[0072] Combined with the foregoing embodiments, in a specific embodiment, the adapter 15 is mounted in the first groove 1111. One of the adapter 15 and the groove wall of the first groove 1111 is provided with a clamping protrusion, and the other is provided with a clamping groove or a clamping hole. The adapter 15 and the first groove 1111 are connected together through the cooperation of the clamping groove and the clamping hole.

[0073] In some embodiments, as Figure 1 and Figure 9 shown, the dual-chamber mixed dosing device 1 further includes a push seat 16. Two second mounting grooves 161 are provided on the push seat 16. The two opposite groove walls of the second mounting grooves 161 respectively abut against both sides of the push handle 23 of the syringe 2. A notch for avoiding the push rod 24 of the syringe 2 is provided on one of the groove walls; the openings of the two second mounting grooves 161 face the two opposite sides of the push seat 16 respectively.

[0074] In this embodiment, by providing a push seat 16, two second mounting grooves 161 are provided on the push seat 16. The push handles 23 of the two syringes 2 mounted on the double-link bracket 11 are respectively clamped in the two second mounting grooves 161. The two groove walls of the second mounting groove 161 respectively abut against both sides of the push handle 23, and the push rod 24 extends out from the notch on the groove wall. When a user administers medicine through the double-link mixing medicine delivery device 1, the push handles 23 of the two syringes 2 can be synchronously pushed by pushing the push seat 16, so that the push rods 24 of the two syringes 2 can be synchronously driven to push into the injection tube 21, and the solution in the injection tube 21 is injected into the three-way pipe 121. At the same time, by respectively orienting the openings of the two second mounting grooves 161 in two directions away from each other, after the push handles 23 of the two syringes 21 are respectively mounted in the two second mounting grooves 161, the push handles 23 of the two syringes 21 can respectively limit the push seat 16 from two directions, preventing the push handles 23 of the syringes 21 from disengaging from the second mounting grooves 161.

[0075] Specifically, in some embodiments, as Figure 9 shown, elastic protrusions 162 corresponding to the second mounting grooves 161 one by one are further provided on the push seat 16; the elastic protrusions 162 and the bottom of the second mounting groove 161 clamp the outer peripheral wall of the push handle 23; the elastic protrusions 162 can elastically deform in a direction close to or away from the bottom of the second mounting groove 161.

[0076] In this embodiment, by providing the elastic protrusions 162 at positions on the push seat 16 opposite to the second mounting grooves 161, the elastic protrusions 162 and the second mounting grooves 161 can respectively clamp both sides of the push handle 23, thereby fixing the push handle 23 of the syringe 2 in the second mounting groove 161. At the same time, the elastic protrusions 162 have a certain elasticity and can elastically deform in a direction close to or away from the bottom of the second mounting groove 161, so as to clamp push handles 23 of different sizes, so that the push seat 16 can be applicable to syringes 2 of different specifications.

[0077] In some embodiments, as Figure 1 shown, a medicine outlet flexible tube 124 is connected to one end of the mixing tube 122 away from the three-way pipe 121. In this embodiment, the medicine outlet flexible tube 124 is provided at the medicine outlet end of the mixing tube 122. The medicine outlet flexible tube 124 is relatively soft and can be used to apply the mixed solution to the wound site of a patient, so as to reduce the pain caused to the patient when the medicine outlet end touches the patient's wound.

[0078] Optionally, in some embodiments, the angles formed by the projections of the two ends of the first fin 1232 and the second fin 1233 along the length direction of the rod body 1231 on a plane perpendicular to the rod body 1231 are both 270°.

[0079] Specifically, there are multiple first fins 1232 and second fins 1233, and they are arranged in one-to-one correspondence. The distance between two adjacent groups of first fins 1232 and second fins 1233 is 2 mm.

[0080] Furthermore, a flat portion 1234 is connected to each end of the first fin 1232. The flat portion 1234 is perpendicular to the central axis of the rod body 1231, and the end face of the flat portion 1234 away from the first fin 1232 and the end face of the first fin 1232 form an angle of 30°.

[0081] Similarly, a flat portion 1234 is also connected to each end of the second fin 1233, and the structure is the same as that of the flat portion 1234 corresponding to the first fin 1232.

[0082] Based on the above embodiments, the present application has tested screw rods with different structures.

[0083] The test scheme includes: two syringes 2 are respectively filled with two solutions to be mixed. Screw rods with various structures are used for the mixed administration test. After mixing the two solutions through the above-mentioned dual-link mixed administration device 1, the mixture is injected into a transparent glass dish to make the solution present in a straight line.

[0084] The evaluation method of the test scheme is: observing the mixing effect of the two solutions with the naked eye.

[0085] The mixing effect is divided into three grades: excellent, medium, and poor.

[0086] The mixing effect corresponding to the excellent grade is: observing the straight-line solution on the glass dish with the naked eye. After 10 s, the straight-line solution spreads downward together and the solution does not separate.

[0087] The mixing effect corresponding to the medium grade is: observing the straight-line solution on the glass dish with the naked eye. After 10 s, the straight-line solution spreads downward together and the solution separates.

[0088] The mixing effect corresponding to the poor grade is: observing the straight-line solution on the glass dish with the naked eye. After 10 s, the straight-line solution spreads downward dispersedly and the solution separates.

[0089] Based on the above test scheme, the screw rod structures tested in the present application and the corresponding test results are as follows:

[0090] As Figure 10 shown in the unilateral spiral structure, the mixing effect is poor.

[0091] As Figure 11 shown in the unilateral stepped structure, the mixing effect is poor.

[0092] As Figure 12 shown in the bidirectional stepped spiral structure, the mixing effect is poor.

[0093] As Figure 13 shown in the square stepped structure, the mixing effect is poor.

[0094] As Figure 14 shown in the double - helix structure, the angles formed by the projections of the two ends of the first fin 1232 and the second fin 1233 along the length direction of the rod body 1231 on a plane perpendicular to the rod body 1231 are both 50°. Specifically, a plurality of first fins 1232 and second fins 1233 are provided (mainly set according to the solution viscosity requirement, for example, it can be set to 10), and they are arranged in one - to - one correspondence. The spacing between adjacent two groups of first fins 1232 and second fins 1233 is mainly set according to the requirements of the injection force value of the mixed medicament and the viscosity requirement of the mixed medicament (for example, the spacing can be set to 2 mm). Plane portions 1234 are provided at both ends of the first fin 1232 and the second fin 1233. The mixing effect is poor.

[0095] As Figure 15 shown in the double - helix structure, the angles formed by the projections of the two ends of the first fin 1232 and the second fin 1233 along the length direction of the rod body 1231 on a plane perpendicular to the rod body 1231 are both 150°. Specifically, a plurality of first fins 1232 and second fins 1233 are provided (mainly set according to the solution viscosity requirement, for example, it can be set to 10), and they are arranged in one - to - one correspondence. The spacing between adjacent two groups of first fins 1232 and second fins 1233 is mainly set according to the requirements of the injection force value of the mixed medicament and the viscosity requirement of the mixed medicament (for example, the spacing can be set to 2 mm). Plane portions 1234 are provided at both ends of the first fin 1232 and the second fin 1233. The mixing effect is medium.

[0096] For the screw rod 123 in the above - mentioned embodiments of the present application, the angles formed by the projections of the two ends of the first fin 1232 and the second fin 1233 along the length direction of the rod body 1231 on a plane perpendicular to the rod body 1231 are both 270°. Specifically, a plurality of first fins 1232 and second fins 1233 are provided (mainly set according to the solution viscosity requirement, for example, it can be set to 14), and they are arranged in one - to - one correspondence. The spacing between adjacent two groups of first fins 1232 and second fins 1233 is mainly set according to the requirements of the injection force value of the mixed medicament and the viscosity requirement of the mixed medicament (for example, the spacing can be set to 2 mm). Plane portions 1234 are provided at both ends of the first fin 1232 and the second fin 1233. The mixing effect is excellent.

[0097] It can be seen that by comparing the mixing effects of screw rods with different structures, the screw rod 123 in the above - mentioned embodiments of the present application has a better mixing effect. With the increase of the rotation angle and the number of turns, the mixing effect and the injection thrust are significantly improved.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-chamber mixed drug delivery device, characterized in that, Comprising: A double - link bracket, on which two syringes arranged side by side are installed; A mixing assembly, which is arranged on one side of the double - link bracket; the mixing assembly includes a tee - shaped pipe and a mixing pipe; the tee - shaped pipe is provided with two medicine inlet ports and one medicine outlet port, the two medicine inlet ports are respectively communicated with the injection ports of the two syringes, and the medicine outlet port is communicated with the mixing pipe; A screw rod is arranged in the inner cavity of the mixing pipe, the screw rod includes a rod body and first fins and second fins arranged on the rod body, the first fins and the second fins are both spiral along the length direction of the rod body, and the second fins and the first fins are centrosymmetric about the central axis of the rod body.

2. The dual mixed dosing device according to claim 1, wherein A plurality of the first fins are provided, and the plurality of first fins are arranged at intervals along the length direction of the rod body; The second fins and the first fins are arranged in one - to - one correspondence.

3. The dual-chamber mixed dosing device according to claim 2, wherein The angle formed by the projections of the two ends of the first fin along the length direction of the rod body on a plane perpendicular to the rod body is greater than 220 degrees and less than or equal to 320 degrees.

4. The dual mixed drug delivery device according to claim 1, wherein It further includes a connecting piece, and the tee - shaped pipe is connected to the double - link bracket through the connecting piece.

5. The dual-chamber mixed dosing device according to claim 1, characterized in that, Two first mounting grooves arranged side by side are provided on the double - link bracket; each first mounting groove includes a first groove body and a second groove body, and the first groove body accommodates the injection tube of the syringe; The second groove body is arranged at one end of the first groove body, and the second groove body accommodates the protruding structure on the injection tube, and the second groove body has two opposite groove walls, and the two groove walls respectively abut against both sides of the protruding structure along the length direction of the syringe.

6. The dual mixed drug delivery device according to claim 5, characterized in that, It further includes a clamping piece, and the clamping piece is detachably installed on the double - link bracket and is located between the two second groove bodies; Arc - shaped parts adapted to the protruding structure are provided on both sides of the clamping piece, the two arc - shaped parts respectively extend into the two second groove bodies, and the arc - shaped parts abut against the outer peripheral wall of the protruding structure; at least one end of the arc - shaped part is provided with a limiting stop piece, and the limiting stop piece abuts against one side of the protruding structure.

7. The dual mixed drug delivery device according to claim 1, characterized in that, It further includes an adapter, and the adapter is detachably installed on the double - link bracket; The adapter has a clamping groove, and two relatively arranged groove walls in the clamping groove are elastic walls, and the clamping groove is clamped on the outer periphery of the injection tube of the syringe.

8. The dual mixed drug delivery device according to claim 1, wherein It further includes a pushing seat, on which two second mounting grooves are provided, and the two opposite groove walls of the second mounting groove respectively abut against both sides of the pushing handle of the syringe, and a notch for avoiding the push rod of the syringe is provided on one of the groove walls; the openings of the two second mounting grooves respectively face the two opposite sides of the pushing seat.

9. The dual-chamber mixed drug delivery device according to claim 8, characterized in that, Elastic protrusions corresponding to the second mounting grooves one by one are further provided on the pushing seat; The elastic protrusions and the bottom of the second mounting groove clamp the outer peripheral wall of the pushing handle; the elastic protrusions can elastically deform along the direction close to or away from the bottom of the second mounting groove.

10. The dual hybrid administration device according to claim 1, characterized in that, A medicine outlet hose is connected to the end of the mixing pipe far from the tee - shaped pipe.

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