Cassette bottle and disposable syringe

Abstract

The invention relates to the technical field of syringes, in particular to a clamping type bottle and a disposable syringe, the clamping type bottle is used for storing a bottle body of liquid medicine and a sealing piston arranged in the bottle body; the sealing piston comprises sealing rubber tightly attached to the inner wall of the bottle body, and the sealing rubber is arranged on the outer surface of the framework in a sleeving mode and tightly attached to the framework. The disposable syringe is used for slowly pushing the liquid medicine in the cassette bottle into a human body; through thread movement, the injection speed of liquid medicine is slowed down, meanwhile, by means of tight connection of rubber and a framework in a sealed piston in a clamping type bottle, the elasticity of the rubber is weakened, the rubber is not prone to deformation, the rubber plug is further not prone to deformation in cooperation with the design of a tiny arc face protruding downwards, and then the situation that part of the liquid medicine is stored after the rubber plug deforms is avoided; therefore, the last two drops of liquid medicine are prevented from being generated.

Description

Technical Field

[0001] The invention belongs to the field of syringes, and in particular relates to a cartridge bottle and a disposable syringe. Background Art

[0002] A disposable insulin injection pen is a precision injection device that combines liquid medicine and a syringe into one. The liquid medicine is placed in the pen in the form of a refill. When using it, you do not need to draw the liquid medicine every time. You only need to remove the pen cap and adjust the knob to the pre-set dose to inject insulin.

[0003] Usually, in the treatment of diabetic patients with injection drugs, diabetic patients or their protectors need to inject insulin into the patients two to three times a day. At this time, the amount of insulin required by the patients will change according to the number of times and the physical condition of the patients. For example, the dosage of injections on an empty stomach and after meals will be different. In order to keep the blood sugar level in the patients stable, the injection dosage must be strictly controlled. Therefore, the insulin pen needs to be able to accurately adjust the dosage, and it also needs to be able to remind the patients of the results of the dosage adjustment during the adjustment process to prevent the patients from making mistakes in the dosage adjustment and thus affecting the injection dosage.

[0004] After adjusting the injection dose, when the traditional insulin injection pen is pulled out after injection, two drops of liquid medicine will drip out, so that the actual injection amount of the patient does not reach the specified injection dose, which may reduce the efficacy of the medicine and also cause a waste of liquid medicine;

[0005] The reason for the dripping of drug solution is often because the injection speed of traditional insulin injection pens is relatively fast, and the rubber plug in the pen core is relatively elastic. When the insulin pen is injected quickly, under the action of the subcutaneous pancreatic islet lake, the rubber plug will be affected by the reaction force when squeezing out the drug solution, causing the rubber plug to deform in the opposite direction and form a concave surface. The concave surface will store part of the drug solution. If the patient pulls out the needle quickly, the pressure will be reduced, and the rubber plug will rebound. At this time, the stored drug solution will drip along with it, and generally two drops will be produced. The dripping drug cannot be injected into the patient's body, which will cause the patient to receive less than the required dose. Therefore, it is necessary to design cartridge bottles and disposable syringes to solve the above problems. Summary of the invention

[0006] To solve the above technical problems, the present invention provides a cartridge bottle and a disposable syringe to solve the problem mentioned in the above background technology that when the insulin injection pen on the market is injected quickly and the needle is pulled out, the drug solution will drip, thereby reducing the efficacy of the drug and wasting the drug solution.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] The cartridge bottle comprises: a bottle body for storing liquid medicine and a sealing piston arranged inside the bottle body; the sealing piston comprises a sealing rubber tightly fitted with the inner wall of the bottle body, and the sealing rubber sleeve is arranged on the outer surface of the frame and tightly fitted with the frame.

[0009] As a further improvement of the present invention, the bottom surface of the frame is in a slightly convex arc shape, which is used to make the bottom surface of the frame and the bottom surface of the sealing rubber completely fit together and squeeze out all the liquid medicine in the bottle.

[0010] Disposable syringe, including:

[0011] A housing, the housing comprising an upper housing and a lower housing connected to each other, the lower housing being used to store the cartridge bottle;

[0012] A sealing cap, which is arranged on the outer side of the lower shell; and

[0013] The injection mechanism includes a driving assembly and a liquid pushing assembly. The driving assembly is installed in the shell. The liquid pushing assembly is threadedly connected to the driving assembly. Pressing the driving assembly causes the driving assembly to rotate and drives the liquid pushing assembly to push the sealing piston to move under the action of the thread, thereby squeezing out the medicine to complete the injection.

[0014] As a further improvement of the present invention, the driving assembly includes a button, the button is clamped on the top of the column, and the column and the button are connected by a spring;

[0015] The column is clamped on the top of the driving drum, and a first ratchet is provided at the bottom of the driving drum, a ratchet is meshed at the bottom of the first ratchet, a second ratchet is meshed at the bottom of the ratchet, and the second ratchet is provided at the bottom end of the outer rotating drum; a partition is provided at the lower side of the upper shell, and the upper surface of the partition is in contact with the bottom end of the outer rotating drum; a window is threadedly connected to the upper side of the outer surface of the outer rotating drum, and the window is limitedly clamped with the upper shell;

[0016] The ratchet is fixed to the outer surface of the inner cylinder, and the inner cylinder is threadedly connected to the inside of the driving rotating cylinder; the bottom of the inner cylinder passes through the partition and fits with the limit seat, and the limit seat is fixed inside the upper shell and fits with the lower surface of the partition;

[0017] The liquid pushing assembly comprises a push rod threadedly connected to the inner tube, a gasket plug is fixed to the bottom of the push rod, and the push rod and the gasket plug extend into the lower shell body to push the sealing piston.

[0018] As a further improvement of the present invention, an opening cooperating with the window is provided on the upper shell; the outer surface of the outer rotating cylinder is provided with spirally distributed scale values; a knob is fixed on the top of the outer rotating cylinder, and the knob is arranged outside the button.

[0019] As a further improvement of the present invention, a third ratchet is provided inside the upper end of the push rod seat, and a plurality of groups of ratchet claws in an annular array are provided at the bottom of the inner cylinder. The inner cylinder rotates in a single direction under the cooperation of the ratchet claws and the third ratchet.

[0020] As a further improvement of the present invention, a limiting convex ring is provided on the upper side of the lower shell body, which is used to limit and separate the upper shell body and the sealing cap; positioning protrusions are symmetrically provided on the surface of the lower shell body above the limiting convex ring, and a positioning groove cooperating with the positioning protrusion is provided on the upper shell body; a fixing protrusion is provided on the lower shell body, and a positioning groove cooperating with the fixing protrusion is provided on the inner wall of the sealing cap.

[0021] As a further improvement of the present invention, a vertical positioning groove is provided on the surface of the lower shell body between the two groups of positioning protrusions on the same side, and a positioning convex strip cooperating with the vertical positioning groove is provided on the inner wall of the upper shell body.

[0022] As a further improvement of the present invention, a needle cap docking block is integrally provided at the bottom of the lower shell, and an inner needle cap is connected to the needle cap docking block.

[0023] As a further improvement of the present invention, the outer surface of the needle cap docking block is provided with connecting threads and connecting convex rings for adapting to inner needle caps of different connection types.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention reduces the injection speed of the liquid medicine by the movement of the thread, and at the same time utilizes the tight connection between the rubber and the frame in the sealing piston of the cartridge bottle to reduce the elasticity of the rubber and make it difficult to deform. The design of the slightly curved surface convex downward further makes the rubber plug difficult to deform, thereby avoiding the storage of part of the liquid medicine after the deformation of the rubber plug, that is, avoiding the generation of the last two drops of liquid medicine.

[0026] The present invention provides a connecting thread and a connecting convex ring on the outer surface of the needle cap docking block, so that it can be adapted to inner needle caps of different connection types, and can also be adapted to needles of different connection types, thereby enhancing its applicability.

[0027] The present invention rotates the outer rotating cylinder so that the outer rotating cylinder moves up or down relative to the window to a desired scale, wherein the lower part of the outer rotating cylinder has inner teeth, and the inner teeth cooperate with the ratchet wheel and the ratchet wheel at the lower end of the driver to perform meshing transmission. Since there is a tooth-jumping space at this time, the spring can be compressed at this time, and the outer rotating cylinder cannot drive the inner cylinder and the push rod to rotate; the position of the push rod remains unchanged, and the inner teeth of the rotating cylinder and the ratchet wheel or the ratchet wheels and the ratchet wheels perform tooth-jumping motion when adjusting the dosage, and a tooth-jumping sound prompt is generated, which is convenient for patients to adjust the dosage;

[0028] The present invention presses a button, the button squeezes the driver and the outer rotating cylinder, the thread of the outer rotating cylinder squeezes the thread in the window, the thread generates a tangential component force that causes the outer rotating cylinder to rotate, at this time the spring is in a compressed state, the inner teeth of the outer rotating cylinder and the ratchet, and the ratchets are tightly meshed, there is no tooth skipping space described above, the rotation of the outer rotating cylinder drives the ratchet and the driver to rotate, the rotation of the driver drives the inner cylinder to rotate; the rotation of the inner cylinder drives the push rod forward, the push rod squeezes the sealing piston in the cartridge bottle, and squeezes out the medicine liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the cross-sectional structure of the cartridge bottle of the present invention;

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the disposable syringe of the present invention;

[0032] Figure 3 It is a front view structural schematic diagram of the housing of the disposable syringe of the present invention;

[0033] Figure 4 It is a schematic diagram of the disassembled structure of the disposable syringe of the present invention;

[0034] Figure 5 It is a partial cross-sectional structural schematic diagram of the disposable syringe of the present invention;

[0035] Figure 6 It is a partial cross-sectional structural schematic diagram of the disposable syringe of the present invention;

[0036] Figure 7 It is a schematic diagram of the top view of the inner cylinder of the disposable syringe of the present invention;

[0037] Figure 8 The figure is a schematic diagram of the use of a disposable syringe and a cartridge bottle in the prior art.

[0038] The names represented by the part numbers in the above 8 schematic diagrams are as follows:

[0039] 110, upper shell; 111, partition; 112, opening; 113, slot; 114, positioning convex strip; 120, lower shell; 121, positioning convex block; 122, positioning vertical groove; 123, limiting convex ring; 124, fixing convex block; 125, needle cap docking block; 1251, connecting thread; 1252, connecting convex ring; 130, inner needle cap;

[0040] 210, bottle body; 220, sealing piston; 221, sealing rubber; 222, frame;

[0041] 310, sealing cap;

[0042] 410, button; 420, cylinder; 430, spring; 440, driving drum; 441, first ratchet; 450, ratchet; 460, outer drum; 461, second ratchet; 462, knob; 470, window; 480, inner drum; 481, pawl; 490, push rod; 491, gasket plug;

[0043] 510. Limiting seat; 511. Third ratchet. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with 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.

[0045] The present invention provides the following embodiments:

[0046] The cartridge bottle comprises a bottle body 210 for storing liquid medicine and a sealing piston 220 arranged inside the bottle body 210; the sealing piston 220 comprises a sealing rubber 221 which is tightly fitted with the inner wall of the bottle body 210, and the sealing rubber 221 is sleeved on the outer surface of a frame 222 and tightly fitted with the frame 222; the bottom surface of the frame 222 is in a slightly convex arc shape, which is used to make the bottom surface of the frame 222 and the bottom surface of the sealing rubber 221 completely fit and squeeze out all the liquid medicine in the bottle body 210; in the sealing piston 220 in the cartridge bottle, the rubber and the frame 222 are tautly connected, so that the elasticity of the rubber is weakened during the injection process and it is not easy to deform, and the design of the slightly convex arc surface further makes the rubber plug not easy to deform, thereby avoiding the storage of part of the liquid medicine after the rubber plug is deformed, that is, avoiding the generation of the last two drops of liquid medicine;

[0047] A disposable syringe comprises a housing, a sealing cap 310 and an injection mechanism, wherein the housing comprises an upper housing 110 and a lower housing 120 connected to each other, wherein the lower housing 120 is used to store a cartridge bottle; the sealing cap 310 is arranged outside the lower housing 120; the injection mechanism comprises a driving assembly and a liquid pushing assembly, wherein the driving assembly is installed in the housing, the liquid pushing assembly is threadedly connected to the driving assembly, the driving assembly is pressed to rotate and the liquid pushing assembly is driven by the thread to push the sealing piston 220 to move, thereby squeezing out the liquid medicine to complete the injection;

[0048] The driving assembly includes a button 410, which is clamped on the top of the column 420, and the column 420 and the button 410 are connected by a spring 430; the column 420 is clamped on the top of the driving drum 440, and the bottom of the driving drum 440 is provided with a first ratchet 441, and the bottom of the first ratchet 441 is meshed with a ratchet 450, and the bottom of the ratchet 450 is meshed with a second ratchet 461, and the second ratchet 461 is arranged at the bottom end of the outer rotating drum 460; a partition 111 is arranged on the lower side of the upper shell 110, and the upper surface of the partition 111 is in contact with the bottom end of the outer rotating drum 460; the upper surface of the outer rotating drum 460 is threaded A window 470 is connected, and the window 470 is limitedly engaged with the upper shell 110; the ratchet 450 is fixed to the outer surface of the inner cylinder 480, and the inner cylinder 480 is threadedly connected to the inside of the driving rotating cylinder 440; the bottom of the inner cylinder 480 passes through the partition 111 and fits with the limit seat 510, and the limit seat 510 is fixed to the inside of the upper shell 110 and fits with the lower surface of the partition 111; the liquid pushing assembly includes a push rod 490 threadedly connected to the inside of the inner cylinder 480, and a gasket plug 491 is fixed to the bottom of the push rod 490, and the push rod 490 and the gasket plug 491 extend into the inside of the lower shell 120, which is used to push the sealing piston 220;

[0049] The upper shell 110 is provided with an opening 112 that matches the window 470; the outer surface of the outer rotating cylinder 460 is provided with spirally distributed scale values; a knob 462 is fixed on the top of the outer rotating cylinder 460, and the knob 462 is arranged outside the button 410; a third ratchet 511 is arranged inside the upper end of the push rod 490, and a plurality of groups of ratchet pawls 481 in a circular array are arranged at the bottom of the inner cylinder 480, and the inner cylinder 480 rotates in a single direction under the cooperation of the ratchet pawls 481 and the third ratchet 511;

[0050] A limiting convex ring 123 is provided on the upper side of the lower shell 120 for limiting and separating the upper shell 110 and the sealing cap 310; positioning protrusions 121 are symmetrically provided on the surface of the lower shell 120 above the limiting convex ring 123, and a positioning card groove 113 cooperating with the positioning protrusion 121 is provided on the upper shell 110; a fixing protrusion 124 is provided on the lower shell 120, and a positioning groove cooperating with the fixing protrusion 124 is provided on the inner wall of the sealing cap 310; a positioning vertical groove 122 is provided on the surface of the lower shell 120 between the two groups of positioning protrusions 121 on the same side, and a positioning convex strip 114 cooperating with the positioning vertical groove 122 is provided on the inner wall of the upper shell 110;

[0051] A needle cap docking block 125 is integrally provided at the bottom of the lower shell 120, and an inner needle cap 130 is connected to the needle cap docking block 125; a connecting thread 1251 and a connecting convex ring 1252 are provided on the outer surface of the needle cap docking block 125, which are used to adapt to inner needle caps 130 of different connection types. A connecting thread 1251 and a connecting convex ring 1252 are provided on the outer surface of the needle cap docking block 125, which can adapt to inner needle caps 130 of different connection types, and can also adapt to needles of different connection types, thereby enhancing its applicability.

[0052] Working principle:

[0053] When the dose of the injection pen needs to be adjusted, the outer rotating cylinder 460 is rotated so that the outer rotating cylinder 460 moves up or down relative to the window 470 to the required scale, wherein the lower part of the outer rotating cylinder 460 has inner teeth, and the inner teeth cooperate with the ratchet 450 and the ratchet 450 at the lower end of the driver to perform meshing transmission. Since there is a tooth-jumping space at this time, the spring 430 can be compressed at this time, and the outer rotating cylinder 460 cannot drive the inner cylinder 480 and the push rod 490 to rotate; the position of the push rod 490 remains unchanged, and the inner teeth of the rotating cylinder and the ratchet 450 or the ratchet 450 and the ratchet 450 perform tooth-jumping motion when the dose is adjusted, and a tooth-jumping sound prompt is generated, which is convenient for patients to adjust the dose;

[0054] When the injection pen is needed for injection, the button 410 is pressed, and the button 410 squeezes the driver and the outer rotating cylinder 460. The threads of the outer rotating cylinder 460 squeeze the threads in the window 470, and the threads generate a tangential component force that causes the outer rotating cylinder 460 to rotate. At this time, the spring 430 is in a compressed state, and the inner teeth of the outer rotating cylinder 460 and the ratchet 450, as well as the ratchet 450 and the ratchet 450 are tightly meshed, and there is no tooth skipping space described above. The rotation of the outer rotating cylinder 460 drives the ratchet 450 and the driver to rotate, and the rotation of the driver drives the inner cylinder 480 to rotate; the rotation of the inner cylinder 480 drives the push rod 490 forward, and the push rod 490 squeezes the sealing piston 220 in the cartridge bottle to squeeze out the medicine.

[0055] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Cartridge bottle, characterized in that: include: A bottle body (210) for storing liquid medicine and a sealing piston (220) disposed inside the bottle body (210); the sealing piston (220) comprises a sealing rubber (221) that is tightly fitted to the inner wall of the bottle body (210); the sealing rubber (221) is sleeved on the outer surface of a frame (222) and is tightly fitted to the frame (222).

2. The cartridge bottle according to claim 1, characterized in that: The bottom surface of the frame (222) is in the shape of a slightly convex arc surface, which is used to make the bottom surface of the frame (222) completely fit the bottom surface of the sealing rubber (221) and squeeze out all the liquid medicine in the bottle body (210).

3. A disposable syringe, characterized in that: include: A housing, the housing comprising an upper housing (110) and a lower housing (120) connected to each other, the lower housing (120) being used to store the cartridge bottle as claimed in any one of claims 1 to 4; A sealing cap (310), the sealing cap (310) being arranged on the outside of the lower housing (120); as well as The injection mechanism comprises a driving assembly and a liquid pushing assembly. The driving assembly is installed in the housing. The liquid pushing assembly is threadedly connected to the driving assembly. Pressing the driving assembly causes the driving assembly to rotate and the liquid pushing assembly is driven by the thread to push the sealing piston (220) to move, thereby squeezing out the liquid medicine to complete the injection.

4. The disposable syringe according to claim 3, characterized in that: The driving assembly comprises a button (410), the button (410) is clamped on the top of the column (420), and the column (420) and the button (410) are connected via a spring (430); The column (420) is clamped on the top of the driving rotating cylinder (440), and the bottom of the driving rotating cylinder (440) is provided with a first ratchet (441), and the bottom of the first ratchet (441) is meshed with a ratchet (450), and the bottom of the ratchet (450) is meshed with a second ratchet (461), and the second ratchet (461) is arranged at the bottom end of the outer rotating cylinder (460); a partition (111) is arranged on the lower side of the upper shell (110), and the upper surface of the partition (111) is fitted with the bottom end of the outer rotating cylinder (460); a window (470) is threadedly connected to the upper side of the outer surface of the outer rotating cylinder (460), and the window (470) is limitedly clamped with the upper shell (110); The ratchet (450) is fixed to the outer surface of the inner cylinder (480), and the inner cylinder (480) is threadedly connected to the inside of the driving rotating cylinder (440); the bottom of the inner cylinder (480) passes through the partition (111) and fits with the limit seat (510), and the limit seat (510) is fixed to the inside of the upper shell (110) and fits with the lower surface of the partition (111); The liquid pushing assembly includes a push rod (490) threadedly connected to the inner tube (480), a gasket plug (491) is fixed to the bottom of the push rod (490), and the push rod (490) and the gasket plug (491) extend into the lower shell (120) to push the sealing piston (220).

5. The disposable syringe according to claim 4, characterized in that: The upper shell (110) is provided with an opening (112) that matches the window (470); the outer surface of the outer rotating cylinder (460) is provided with spirally distributed scale values; a knob (462) is fixed at the top of the outer rotating cylinder (460), and the knob (462) is arranged outside the button (410).

6. The disposable syringe according to claim 5, characterized in that: A third ratchet (511) is provided inside the upper end of the push rod (490) seat, and a plurality of groups of ratchet pawls (481) in an annular array are provided at the bottom of the inner cylinder (480). The inner cylinder (480) rotates in a single direction under the cooperation of the ratchet pawls (481) and the third ratchet (511).

7. The disposable syringe according to claim 6, characterized in that: A limiting convex ring (123) is provided on the upper side of the lower shell (120) for limiting and separating the upper shell (110) and the sealing cap (310); positioning protrusions (121) are symmetrically provided on the surface of the lower shell (120) above the limiting convex ring (123); a positioning groove (113) cooperating with the positioning protrusion (121) is provided on the upper shell (110); a fixing protrusion (124) is provided on the lower shell (120), and a positioning groove cooperating with the fixing protrusion (124) is provided on the inner wall of the sealing cap (310).

8. The disposable syringe according to claim 7, characterized in that: A vertical positioning groove (122) is provided on the surface of the lower shell (120) between the two groups of positioning protrusions (121) on the same side, and a positioning protrusion (114) matching the vertical positioning groove (122) is provided on the inner wall of the upper shell (110).

9. The disposable syringe according to claim 8, characterized in that: A needle cap docking block (125) is integrally provided at the bottom of the lower housing (120), and an inner needle cap (130) is connected to the needle cap docking block (125).

10. The disposable syringe according to claim 9, characterized in that: The outer surface of the needle cap docking block (125) is provided with a connecting thread (1251) and a connecting convex ring (1252) for adapting to inner needle caps (130) of different connection types.

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