CN211272886U - Pre-filled automatic injector capable of replacing medicine - Google Patents
Pre-filled automatic injector capable of replacing medicine Download PDFInfo
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- CN211272886U CN211272886U CN201920614768.6U CN201920614768U CN211272886U CN 211272886 U CN211272886 U CN 211272886U CN 201920614768 U CN201920614768 U CN 201920614768U CN 211272886 U CN211272886 U CN 211272886U
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Abstract
The utility model discloses a pre-filled automatic injector with replaceable medicine, the safety device comprises an injection rod shell, an injection rod and an injection spring groove, one end of a spring wane is fixedly connected with an extrusion spring, the other end of the extrusion spring is fixed in the injection spring groove and the spring wane, one end of an ejection rod is placed in a circular groove, the other end of the ejection rod is provided with a circular ring, the middle of the circular ring is upwards protruded, the circular ring is fixed in the shell, a spring is arranged between the circular ring and the top of the shell, the ejection rod passes through the spring, an annular lug is arranged in the injection rod shell, two opposite protrusions are arranged on the outer side of the injection rod, the injection rod is sleeved on the injection rod through the spring, and the lower end of the injection rod is provided with a; the medicine storage device comprises a medicine cylinder, a piston is arranged in the medicine cylinder, the bottom of the medicine cylinder is connected with a needle head, and the needle head can be replaced; the lower end of the percussion device is in threaded connection with the medicine storage device, and the safety device is in buckle connection with the upper end of the percussion device.
Description
Technical Field
The utility model relates to the technical field of medical treatment, concretely relates to can replace prefilled automatic injector of medicine.
Background
The common medical syringe's constitutional structure on the existing market contains the injection tube of storing the medicine, and injection tube one end is inside to be equipped with the injection push rod, and the injection tube other end is equipped with the syringe needle, and the syringe needle has overlapped the syringe needle protective sheath. When the injector is used, the needle head protective sleeve needs to be taken down, prepared medicines are filled into the injection tube in advance, the injection needs to be carried out by medical staff, the injection of the injector cannot be completed by non-medical staff, the medicines need to be filled into the injection tube in a later period, the needle head is in a non-sterile environment, in an emergency situation, precious time is delayed by a complicated operation process, and the injector is very inconvenient to use.
Disclosure of Invention
The purpose of the invention is as follows: the utility model aims to provide a not enough to prior art, provide a can replace prefill automatic injector of medicine, under emergency, according to the different medicines that prepare in advance, the direct mount injection.
The technical scheme is as follows: a pre-filled auto-injector for replaceable medication, comprising:
the safety device comprises a top cover, an ejection rod and a shell, wherein a 270-degree fan-shaped clamping groove is formed in the bottom of the top cover, a pair of opposite grooves are formed in the fan-shaped clamping groove, and one groove is formed in the end portion of the fan-shaped clamping groove; the top of the shell is provided with two opposite buckles, one of the buckles is clamped at one end, which is not provided with a groove, of the fan-shaped clamping groove, a circular groove is formed in the center of the top of the shell, one end of the ejection rod is placed in the circular groove, the other end of the ejection rod is provided with a circular ring, the middle of the circular ring is upwards protruded, the circular ring is fixed in the shell, a spring is arranged between the circular ring and the top of the shell, and the ejection rod penetrates through the spring;
the firing device comprises an injection rod shell, an injection rod and an injection spring groove, wherein one end of the spring wane is fixedly connected with an extrusion spring, the other end of the extrusion spring is fixed in the injection spring groove, the injection rod spring is sleeved on the injection rod, and the lower end of the injection rod is provided with a downward push rod;
the medicine storage device comprises a medicine cylinder, wherein a piston is arranged in the medicine cylinder, the bottom of the medicine cylinder is connected with a needle head, and the needle head can be replaced;
the lower end of the triggering device is in threaded connection with the medicine storage device, and the safety device is in buckled connection with the upper end of the triggering device.
Further perfecting the technical scheme, the needle head adopts a hollow micro-needle array structure.
Furthermore, a medicament window is arranged on the side surface of the medicament storage device and used for observing the residual amount of the medicament in the medicament storage device.
Further, the medicine storage device adopts multiple colors, and different medicines are filled in the medicine storage device according to different colors.
Furthermore, the needles are distributed in a circle with 4-8 needles, and are distributed on a circle with the diameter of 1 cm.
Further, the length of the needle head is 0.2mm-4 mm.
Further, the needle head has the thickness of 27G-34G.
Further, the medicine storage device is provided with a microneedle protective sleeve, and the microneedle protective sleeve is connected with the medicine storage device in a buckling manner.
Further, a silica gel pad is arranged in the microneedle protective sleeve.
Has the advantages that: compared with the prior art, the utility model has the advantages of: according to the difference of the current situation, the corresponding medicine storage device is selected to be directly installed on the percussion device for injection, and the multichannel microneedle needle is adopted, so that the wounded can vertically inject the first-aid medicine to the subcutaneous tissue in the positions of abdomen, arms, thighs, buttocks and the like quickly, without leakage of liquid, pain and convenience by one-hand operation in a complex environment, thereby realizing self-rescue.
Drawings
FIG. 1 is a schematic diagram of the operation of the syringe with replaceable medicine according to the present invention;
FIG. 2 is a schematic diagram of a replaceable medication syringe according to the present invention;
FIG. 3 is a schematic diagram of the syringe of the present invention after injection of the replaceable medication;
FIG. 4 is a schematic view of the replaceable medication syringe of the present invention prior to actuation of the safety;
FIG. 5 is a schematic view of the safety device of the replaceable medication syringe of the present invention after activation;
FIG. 6 is a schematic view of the replaceable medication syringe safety device of the present invention prior to actuation;
FIG. 7 is a schematic view of the safety device of the replaceable medication syringe of the present invention after activation;
FIG. 8 is a schematic diagram of the present invention showing the trigger device of the drug replaceable injector before actuation;
FIG. 9 is a schematic view of the drug storage device of the replaceable drug injector of the present invention prior to actuation;
fig. 10 is a schematic structural view of a microneedle protection cover of the drug-replaceable syringe according to the present invention;
fig. 11 is a schematic structural view of a microneedle array of a drug-replaceable syringe according to the present invention;
fig. 12 is a schematic structural view of a microneedle array of a drug-replaceable syringe according to the present invention;
fig. 13 is a schematic view of the outer structure of the syringe with replaceable medicine according to the present invention.
In the figure: 1. a safety device 2, a percussion device 3, a medicine storage device 4 and a microneedle protective sleeve;
1-1 part of a buckle, 1-2 parts of a groove, 1-3 parts of a shell, 1-4 parts of a fan-shaped clamping groove, 1-5 parts of a top cover, 1-6 parts of a groove, 1-7 parts of a push rod, 1-8 parts of a spring, 1-9 parts of a ring;
2-1 injection spring, 2-2 injection rod, 2-3 rocker spring, 2-4 raised groove, 2-5 spring, 2-6 convex block and 2-7 injection push rod;
3-1 piston, 3-2, cartridge case, 3-3, cartridge case, 3-4 microneedle array needle;
4-1 microneedle protective sleeve, 4-2 and a silica gel pad.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Example 1: the replaceable syringe for medicine shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, and fig. 13 comprises a safety device, a triggering device, a medicine storage device, and a microneedle protection cover, wherein the safety device is in snap-fit connection with the triggering device, the triggering device is in threaded connection with the medicine storage device, and the medicine storage device is in snap-fit connection with the microneedle protection cover;
the safety device comprises a shell 1-3 and a top cover 1-5, wherein the shell 1-3 is in threaded connection with the top cover 1-5, the top of the shell 1-3 is provided with a pair of opposite buckles 1-1, the lower end of the top cover 1-5 is provided with a 270-degree fan-shaped clamping groove 1-4, the inner side of the fan-shaped clamping groove 1-4 is provided with two opposite grooves 1-2, one groove 1-2 is positioned at the top end of the fan-shaped clamping groove 1-4, the center of the top of the shell 1-3 is also provided with a groove 1-6, a push rod 1-7 is arranged in the groove 1-6, the other end of the push rod 1-7 is connected with a ring 1-9, the ring 1-9 is fixed on the inner wall of the shell 1-3, a spring 1-8 is arranged between the ring 1-9 and the top cover 1, the push rod 1-7 penetrates through the spring 1-8, the push rod 1-7 extends into the injection rod 2-2, the upper port of the injection rod 2-2 is provided with a display plate which extends in parallel towards the periphery, the display plate is propped against the lower end of the circular ring 1-9, the injection spring 2-1 is arranged in the injection rod 2-2, the lower end of the push rod 1-7 is arranged in the injection spring 2-1 and is not in any contact with the injection spring 2-1, the outer side of the injection rod 2-2 is provided with two opposite convex grooves 2-4 which protrude outwards, the springs 2-5 are respectively and fixedly connected in the convex grooves 2-4, the other ends of the springs 2-5 are respectively and fixedly connected with one end of the rocker spring 2-3, the fulcrum of the rocker spring 2-3 is attached to the outer wall of the injection rod 2-2, the top of the injection rod 2-2 is also provided with the injection push, the shell 1-3 is a circular ring with a thick upper part and a thin lower part, the lower part of the shell 1-3 is arranged at the inner side of the upper part of the shell of the injection rod 2-2, the injection push rod 2-7 is propped against the upper end of the piston 3-1, the piston 3-1 is arranged inside the upper end of the medicine cylinder 3-3, the lower end of the medicine cylinder 3-3 is provided with a liquid medicine pipeline which protrudes downwards, the pipeline is connected with a hollow microneedle, the microneedle protective sleeve 4-1 is sleeved outside the medicine storage device, and the hollow microneedle is inserted into a silica gel pad 4-2 in the microneedle protective sleeve 4;
the bottom of a medicine cylinder 3-3 in the medicine storage device is provided with a needle head, the needle head adopts a hollow micro-needle array structure, the needles are distributed on a circular surface with the diameter of 1cm, and in order to ensure reliable injection at the positions of abdomen, arms, thighs, buttocks and the like, ensure that liquid medicine enters the ideal depth of subcutaneous tissues instead of muscular tissues and relieve pain as much as possible, the height of the pain is selected to be 0.2-4 mm; the upper part of the needle head adopts the bottom to be provided with a liquid medicine flow pipeline in the middle of a plane, the lower part of the pipeline adopts an arc-shaped groove, a liquid medicine storage space is reserved, the needle head adopts 27G-34G, the hydrodynamics Bernoulli equation is adopted to calculate that 0.5ml of liquid medicine is injected into subcutaneous tissues in 4 seconds, and the spring needs to provide ideal thrust:
wherein the unit of each parameter is:
t:s；L:m；ρ:kg/m3；S:m2
| syringe specification (ml) | 1ml | Preset of | 2ml | 5ml |
| Corresponding piston 3-1 diameter (mm) | 4.73 | 6.00 | 8.78 | 12.42 |
| Area (mm)2) | 17.53 | 28.27 | 60.60 | 121.13 |
| Journey (mm) | 28.52 | 17.68 | 8.25 | 4.13 |
The 34G needle calculation is as follows:
the results of the 31G needle calculation are as follows:
the 27G needle calculation is as follows:
the thrust required by the spring also needs to be measured accurately, in practice, taking into account the friction between the transmission means, and redundancy is left in the sense of ensuring the safety and reliability of the device.
After the required medicine storage device is installed;
when the safety device is in a locking state, one buckle 1-1 is positioned at a fan-shaped clamping groove 1-4 without the end of the groove 1-2, at the moment, a spring 1-8 is in a compression state, an upper port of an injection rod 2-2 is provided with a display board which extends in parallel to the periphery, the display board is propped against the lower end of a circular ring 1-9, the injection rod 2-2 is internally provided with an injection spring 2-1, the lower end of a push rod 1-7 is positioned in the injection spring 2-1 and is not in any contact with the injection spring 2-1, the outer side of the injection rod 2-2 is provided with two opposite convex grooves 2-4 which protrude outwards, the convex grooves 2-4 are respectively and fixedly connected with springs 2-5, the other ends of the springs 2-5 are respectively and fixedly connected with one ends of rocker springs 2-3, the pivot points of the rocker springs 2-3 are attached to the outer, one end of a rocker spring 2-3 connected with a spring 2-5 is propped against the top end of a lug 2-6 in an injection shell, the other end of the rocker spring 2-3 is propped against an outwardly extending display plate at the top of an injection rod 2-2, an injection push rod 2-7 protruding downwards is further arranged at the top of the injection rod 2-2, the shell 1-3 is a circular ring with a thick upper part and a thin lower part, the lower part of the shell 1-3 is arranged on the inner side of the upper part of the shell of the injection rod 2-2, the injection push rod 2-7 is propped against the upper end of a piston 3-1, the piston 3-1 is positioned on the upper part of a medicine cartridge 3-3, the medicine cartridge is arranged in the medicine cartridge shell 3-2, and a hollow microneedle array is fixed in a.
When the shell is rotated clockwise by 1-3 to 90 degrees, the safety device is in an unlocked state, one buckle 1-1 is positioned at a fan-shaped clamping groove 1-4 at the end provided with the groove 1-2, at the moment, the spring 1-8 drives the shell 1-3 to pop upwards until the lower end of the push rod 1-7 is clamped at the position of the ring 1-9, the micro-needle protective sleeve 4-1 is taken down, one end of a hollow micro-needle is placed on the surface of skin, the top cover 1-5 is pressed, the needle head penetrates into the skin, the shell 1-3 is driven to move downwards, the lower end of the shell 1-3 extrudes the lower part of the rocker spring 2-3, the spring 2-5 on the inner side of the lower end of the rocker spring 2-3 is compressed inwards, when the lower end of the rocker spring 2-3 leaves a lug 2-6 in the injection shell, the injection spring, the push rod at the lower end of the injection rod 2-2 is pushed by the pop force to push the piston at the upper part of the medicine cylinder arranged in the medicine cylinder shell 3-2, and the piston 3-1 is pressed to move downwards to inject the liquid medicine into subcutaneous tissues.
As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A pre-filled auto-injector for replaceable medication, comprising:
the safety device comprises a top cover, an ejection rod and a shell, wherein a 270-degree fan-shaped clamping groove is formed in the bottom of the top cover, a pair of opposite grooves are formed in the fan-shaped clamping groove, and one groove is formed in the end portion of the fan-shaped clamping groove; the top of the shell is provided with two opposite buckles, one of the buckles is clamped at one end, which is not provided with a groove, of the fan-shaped clamping groove, a circular groove is formed in the center of the top of the shell, one end of the ejection rod is placed in the circular groove, the other end of the ejection rod is provided with a circular ring, the middle of the circular ring is upwards protruded, the circular ring is fixed in the shell, a spring is arranged between the circular ring and the top of the shell, and the ejection rod penetrates through the spring;
the firing device comprises an injection rod shell, an injection rod and an injection spring groove, wherein one end of the spring wane is fixedly connected with an extrusion spring, the other end of the extrusion spring is fixed in the injection spring groove, the injection rod spring is sleeved on the injection rod, and the lower end of the injection rod is provided with a downward push rod;
the medicine storage device comprises a medicine cylinder, wherein a piston is arranged in the medicine cylinder, the bottom of the medicine cylinder is connected with a needle head, and the needle head can be replaced;
the lower end of the triggering device is in threaded connection with the medicine storage device, and the safety device is in buckled connection with the upper end of the triggering device.
2. The pre-filled automatic injector according to claim 1, wherein the needle is a hollow microneedle array structure.
3. The prefilled automatic injector of claim 1, wherein said drug storage device is provided with a dosage window at a side thereof for observing the remaining amount of the drug in the drug storage device.
4. The replaceable medication pre-filled automatic injector of claim 1, wherein said medication storage device is provided in a plurality of colors, and different medications are provided according to the colors.
5. A pre-filled automatic injector according to claim 2, characterised in that said needles are distributed according to a circle with 4-8 needles, distributed on a circle with a diameter of 1 cm.
6. A pre-filled auto-injector of replaceable medication according to claim 2, characterised in that the needle length is between 0.2mm and 4 mm.
7. A pre-filled auto-injector of replaceable drugs according to any of the claims 2 or 5, characterized in that the needle thickness is 27-34G.
8. A pre-filled auto-injector of replaceable drugs according to any of claims 1-6, characterized in that the drug storage device is provided with a microneedle guard which snap-fits into the drug storage device.
9. The pre-filled automatic injector of claim 8, wherein a silicone pad is disposed within the microneedle protective sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920614768.6U CN211272886U (en) | 2019-04-29 | 2019-04-29 | Pre-filled automatic injector capable of replacing medicine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920614768.6U CN211272886U (en) | 2019-04-29 | 2019-04-29 | Pre-filled automatic injector capable of replacing medicine |
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| CN211272886U true CN211272886U (en) | 2020-08-18 |
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| CN201920614768.6U Active CN211272886U (en) | 2019-04-29 | 2019-04-29 | Pre-filled automatic injector capable of replacing medicine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908434A (en) * | 2019-04-29 | 2019-06-21 | 中国人民解放军东部战区总医院 | A kind of replaceable drug is prefilled with automatic injector and its working method |
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- 2019-04-29 CN CN201920614768.6U patent/CN211272886U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109908434A (en) * | 2019-04-29 | 2019-06-21 | 中国人民解放军东部战区总医院 | A kind of replaceable drug is prefilled with automatic injector and its working method |
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