Water-powder fusion injector

Abstract

The utility model relates to a water-powder fusion injector, and belongs to the technical field of medical instruments. The powder component comprises a powder sleeve and a middle piston, the middle piston is arranged in the powder sleeve, an end cover is arranged at the head end of the powder sleeve, the tail of the end cover sleeves the periphery of the head end of the powder sleeve, a through hole is formed in the middle of the end cover, the end cover is communicated with the powder sleeve, and a protective cap or a first needle head is detachably arranged at the head end of the end cover; the water aqua assembly, the tail plug and the push rod are sequentially arranged in the powder sleeve, the tail end of the powder sleeve is inserted into the tail plug, the push rod is inserted into the tail plug, and the water aqua assembly, the tail plug and the push rod can slide in the powder sleeve. The water aqua packaging box is simple in structure, independent packaging of water aqua is achieved, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a water-powder fusion syringe and belongs to the technical field of medical equipment. Background Art

[0002] With the development of medicine, syringes are not only used to inject liquid medicines, but also often mix powders and liquid medicines for injection.

[0003] A Chinese patent (CN1165039A) discloses a syringe, wherein the mechanism for preventing liquid medicine from leaking has not only the blocking function of the partition plate, but also the liquid retaining function. The liquid suction mechanism is arranged behind the end sliding sealing member, connected to or spaced from the end sliding sealing member, and when the entire end sliding sealing member passes through the bypass portion, the liquid suction mechanism can absorb and retain the liquid medicine flowing out from the rear of the end sliding sealing member. The representative liquid suction mechanism is disc-shaped and cylindrical-shaped, and the anti-leakage effect can be improved by impregnation with a water-retaining and liquid-absorption accelerator, and the sanitation level can be improved by impregnation with an antibacterial agent.

[0004] The problem with the above patent is that the powder and the liquid are placed in the same barrel-shaped container, and a sliding seal is set in the barrel-shaped container to divide the container into a first chamber and a second chamber. The first chamber contains the powder and the second chamber contains the liquid. By setting a bypass part in the middle of the barrel-shaped container, when the liquid is pushed to the bypass part, the liquid enters the first chamber from the bypass part and mixes with the powder. Placing the powder and the liquid in the same barrel-shaped container has high requirements on the production environment and the production process. The existing equipment can only produce barrel-shaped containers of certain shapes and specifications. For the structure of the bypass part in the middle of the barrel-shaped container, the production equipment needs to be improved before production can be carried out, which increases the production cost. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a water-powder fusion syringe with a simple structure, which realizes the independent packaging of water preparations and reduces the production cost.

[0006] The utility model discloses a water-powder fusion syringe, comprising a water-preparation component, a powder component, a tail plug and a push rod. The powder component comprises a powder sleeve and a middle piston. The middle piston is placed in the powder sleeve. An end cover is arranged at the front end of the powder sleeve. The rear end of the end cover is sleeved on the outer periphery of the front end of the powder sleeve. A through hole is arranged in the middle of the end cover. The end cover is connected with the powder sleeve. A protective cap or a first needle is detachably arranged at the front end of the end cover. The water-preparation component, the tail plug and the push rod are placed in the powder sleeve in sequence. The rear end of the powder sleeve is inserted into the tail plug. The push rod is inserted into the tail plug. The water-preparation component, the tail plug and the push rod can all slide in the powder sleeve.

[0007] The powder sleeve is filled with powder, and the liquid agent component is arranged in the powder sleeve, and the liquid agent and the powder are mixed by pushing the push rod to achieve the water-powder integration. The protective cap seals the powder sleeve. After the powder sleeve is filled with powder, the protective cap can be installed to prevent the powder from spilling. When the liquid agent and the powder are mixed, the powder sleeve needs to be shaken, and the protective cap can prevent the reagent from spilling during the shaking process. When the reagents are mixed, the protective cap is replaced with the first needle to achieve injection.

[0008] The protective cap and the first needle are both connected to the first end of the end cover through threads.

[0009] A finger support is arranged at the rear end of the powder sleeve.

[0010] The water preparation assembly includes a corrugated bag, a guide piston, a second needle and a sealing cover. The guide piston is placed at the sealing end of the corrugated bag. The second needle connects the sealing cover and the guide piston. The sealing cover is placed in the middle piston. The second needle penetrates the guide piston and is connected to the corrugated bag. Before the water and powder are mixed, the second needle does not penetrate the sealing cover. When the water and powder need to be mixed, the second needle penetrates the sealing cover and the middle piston, and the tail end of the corrugated bag abuts against the tail plug. The water preparation is filled in the corrugated bag, and the push rod is pushed. The corrugated bag is compressed, and the force is transmitted to the guide piston, and the second needle is driven to move. The second needle penetrates the sealing cover and the middle piston in sequence, and the water preparation in the corrugated bag enters the powder sleeve with the second needle to achieve mixing of the water preparation and the powder. The corrugated bag itself has a telescopic function, and the water preparation can be extruded by compressing the corrugated bag. The guide piston plays a guiding role for the movement of the corrugated bag; the sealing cover plays a sealing role. When the water preparation in the corrugated bag is in a storage state, the sealing cover prevents the water preparation in the corrugated bag from leaking.

[0011] The corrugated bag is connected to the guide piston by welding.

[0012] The moving distance of the push rod is greater than the distance between the middle piston and the end cover.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) Powder is filled in the powder sleeve. By setting the liquid preparation component in the powder sleeve, the liquid preparation and powder are mixed by pushing the push rod to achieve the integration of water and powder. The protective cap seals the powder sleeve. After the powder sleeve is filled with powder, the protective cap can be installed to prevent the powder from spilling. When the liquid preparation and powder are mixed, the powder sleeve needs to be shaken. The protective cap can prevent the reagent from spilling during the shaking process. When the reagents are mixed, the protective cap is replaced with the first needle to achieve injection. By modularizing the liquid preparation component and the powder preparation component, independent packaging of the liquid preparation is achieved. The liquid preparation component and the powder preparation component can be produced in different workshops, which reduces production requirements and facilitates production. The powder sleeve is of conventional structure, easy to produce, and reduces production costs.

[0015] (2) The liquid preparation component includes a corrugated bag, a guide piston, a second needle and a sealing cover. The guide piston is placed at the sealing end of the corrugated bag. The second needle connects the sealing cover and the guide piston. The sealing cover is placed in the middle piston. The second needle penetrates the guide piston and is connected to the corrugated bag. Before the water and powder are mixed, the second needle does not penetrate the sealing cover. After the water and powder are mixed, the second needle penetrates the sealing cover and the middle piston, and the tail end of the corrugated bag abuts against the tail plug. The corrugated bag is filled with liquid preparation, and the push rod is pushed. The corrugated bag is compressed, and the force is transmitted to the guide piston, and the second needle is driven to move. The second needle penetrates the sealing cover and the middle piston in sequence, and the liquid preparation in the corrugated bag enters the powder sleeve with the second needle to achieve mixing of the liquid preparation and the powder. The corrugated bag itself has a telescopic function, and the liquid preparation can be squeezed out by compressing the corrugated bag. The guide piston guides the movement of the corrugated bag; the sealing cover seals. When the liquid preparation in the corrugated bag is in a storage state, the sealing cover prevents the liquid preparation in the corrugated bag from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of Embodiment 1 of the present utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the water preparation component in Example 1 of the utility model;

[0018] Figure 3 Schematic diagram of the first needle structure.

[0019] In the figure: 1. push rod; 2. tail plug; 3. corrugated bag; 4. guide piston; 5. second needle; 6. sealing cover; 7. middle piston; 8. powder sleeve; 9. end cover; 10. protective cap; 11. finger rest; 12. first needle. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with embodiments:

[0021] Example 1

[0022] like Figure 1 to Figure 3As shown, a water-powder fusion syringe described in the utility model comprises a water-powder component, a powder component, a tail plug 2 and a push rod 1. The powder component comprises a powder sleeve 8 and a middle piston 7. The middle piston 7 is placed in the powder sleeve 8. An end cap 9 is arranged at the head end of the powder sleeve 8. The tail of the end cap 9 is sleeved on the outer periphery of the head end of the powder sleeve 8. A through hole is arranged in the middle of the end cap 9. The end cap 9 is connected with the powder sleeve 8. A protective cap 10 or a first needle 12 is detachably arranged at the head end of the end cap 9. The water-powder component, the tail plug 2 and the push rod 1 are placed in the powder sleeve 8 in sequence. The tail end of the powder sleeve 8 is inserted into the tail plug 2. The push rod 1 is inserted into the tail plug 2. The water-powder component, the tail plug 2 and the push rod 1 can all slide in the powder sleeve 8. The protective cap 10 and the first needle 12 are both connected to the head end of the end cap 9 by threads. A finger support 11 is arranged at the tail end of the powder sleeve 8.

[0023] like Figure 2 As shown, the water preparation assembly includes a corrugated bag 3, a guide piston 4, a second needle 5 and a sealing cover 6. The guide piston 4 is placed at the sealing end of the corrugated bag 3. The second needle 5 connects the sealing cover 6 and the guide piston 4. The sealing cover 6 is placed in the middle piston 7. The second needle 5 penetrates the guide piston 4 and communicates with the corrugated bag 3. Before the water and powder are mixed, the second needle 5 does not penetrate the sealing cover 6. When the water and powder need to be mixed, the second needle 5 penetrates the sealing cover 6 and the middle piston 7, and the tail end of the corrugated bag 3 abuts against the tail plug 2. The corrugated bag 3 is welded to the guide piston 4. The guide piston 4, the middle piston 7 and the tail plug 2 are all rubber products, and the moving distance of the push rod 1 is greater than the distance between the middle piston 7 and the end cover 9.

[0024] The assembly and use process of the utility model device is as follows: first fill the corrugated bag 3 with water, seal it with the sealing cover 6, add the middle piston 7 in the powder sleeve 8, then fill the freeze-dried powder, install the protective cap 10, load the corrugated bag 3 filled with water, then add the tail plug 2, and finally push the push rod 1 into the powder sleeve 8. When in use, push the push rod 1, the corrugated bag 3 is compressed, the force is transmitted to the guide piston 4, and the second needle 5 is driven to move. The second needle 5 penetrates the sealing cover 6 and the middle piston 7 in sequence, and the water in the corrugated bag 3 enters the powder sleeve 8 with the second needle 5, so that the water and powder are mixed. Shake the syringe to fully mix the water and powder. Before injection, replace the protective cap 10 with the first needle 12 to implement the injection.

[0025] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A gouache fusion syringe, characterized in that: The invention comprises a liquid preparation component, a powder preparation component, a tail plug (2) and a push rod (1). The powder preparation component comprises a powder sleeve (8) and a middle piston (7). The middle piston (7) is placed in the powder sleeve (8). An end cover (9) is arranged at the front end of the powder sleeve (8). The rear end of the end cover (9) is sleeved on the outer periphery of the front end of the powder sleeve (8). A through hole is arranged in the middle of the end cover (9). The end cover (9) is connected to the powder sleeve (8). A protective cap (10) or a first needle (12) is detachably arranged at the front end of the end cover (9). The liquid preparation component, the tail plug (2) and the push rod (1) are placed in the powder sleeve (8) in sequence. The rear end of the powder sleeve (8) is inserted into the tail plug (2). The push rod (1) is inserted into the tail plug (2). The liquid preparation component, the tail plug (2) and the push rod (1) can all slide in the powder sleeve (8).

2. The water-powder fusion syringe according to claim 1, characterized in that: The protective cap (10) and the first needle (12) are both connected to the front end of the end cover (9) through threads.

3. The water-powder fusion syringe according to claim 1, characterized in that: A finger support (11) is arranged at the rear end of the powder sleeve (8).

4. The gouache fusion syringe according to any one of claims 1 to 3, characterized in that: The liquid preparation component comprises a corrugated bag (3), a guide piston (4), a second needle (5) and a sealing cover (6); the guide piston (4) is arranged at the sealing end of the corrugated bag (3); the second needle (5) connects the sealing cover (6) and the guide piston (4); the sealing cover (6) is arranged in the middle piston (7); the second needle (5) penetrates the guide piston (4) and is connected with the corrugated bag (3); before the water and powder are mixed, the second needle (5) does not penetrate the sealing cover (6); after the water and powder are mixed, the second needle (5) penetrates the sealing cover (6) and the middle piston (7), and the tail end of the corrugated bag (3) abuts against the tail plug (2).

5. The water-powder fusion syringe according to claim 4, characterized in that: The corrugated bag (3) is connected to the guide piston (4) by welding.

6. The water-powder fusion syringe according to claim 4, characterized in that: The moving distance of the push rod (1) is greater than the distance between the middle piston (7) and the end cover (9).

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