Novel pre-filling spray dosing device

Abstract

The utility model discloses a novel pre-filling spray dosing device which comprises a sealing plug, a pen cap, a pen holder, a piston, a spring, a safety cover, a threaded hole, a push rod, a medicine filling cavity and a medicine nozzle with a small medicine outlet hole. The medicine is prevented from being polluted in a non-use state; the spring is adopted as a power source, it is ensured that the piston can provide enough pressure to atomize liquid medicine, the spraying effect is good, and the spraying consistency and the medicine absorption effect are remarkably improved; when the medicine spraying device is used, the safety cover is unscrewed, fixation of the push rod is relieved, the spring pushes the piston to spray out medicine, the structure is simple, operation is convenient, and the safety and effectiveness of the medicine can be guaranteed. When the aperture of the small medicine outlet hole is 0.1-0.3 mm, the sealing plug and the pen cap are integrally formed, and the piston and the push rod are integrally formed, the use effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of medicine, and particularly relates to a novel pre-filled spray administration device. Background Art

[0002] At present, spray administration devices are widely used in the medical field, especially in the treatment of respiratory diseases, skin diseases, and local anesthesia. The spray administration device can convert liquid medicine into fine mist particles, thereby increasing the surface area of the medicine, promoting the absorption of the medicine, and improving the treatment effect. Traditional spray administration devices usually include manual or automatic spray devices, medicine storage bottles, and nozzles. Although these devices have powerful functions, there are some significant problems. First, traditional spray administration devices usually need to be used multiple times, which requires the equipment to have high cleaning and disinfection standards. Otherwise, it may cause drug contamination and increase the risk of patient infection. Second, the structures of these devices are relatively complex, and the manufacturing cost is relatively high, which is not conducive to popularization and application. In addition, the reusable spray device also needs regular maintenance and replacement of parts, which increases the patient's usage burden and economic pressure.

[0003] To address these problems, disposable spray administration devices have begun to appear on the market. These devices are usually made of plastic or other inexpensive materials and can be directly discarded after use, avoiding the trouble of cleaning and disinfection and reducing the risk of drug contamination. However, there are still some deficiencies in the design of current disposable spray administration devices. For example, the operation of some devices is complex, which is not conducive to the use of patients, especially the elderly and children. There are also some devices that are not compact enough in structure and have poor portability. In addition, the existing pre-filled spray administration devices often require manual operation, and the sprayed mist droplets are greatly affected by the operator, resulting in unstable drug distribution and absorption effects. Summary of the Invention

[0004] The purpose of the utility model is to overcome the above defects of the prior art and provide a novel pre-filled spray administration device with reasonable design, simple structure, convenient use, effective avoidance of drug contamination, good spray effect, and low manufacturing cost.

[0005] To achieve the above technical objectives, a novel pre-filled spray administration device provided by the present utility model is characterized in that: the spray administration device includes a sealing plug, a pen cap, a pen barrel, a piston, a spring, a safety cap, a threaded hole, a push rod, a drug filling cavity and a drug spray nozzle; there is a small medicine outlet hole at the tip of the drug spray nozzle, the pen cap covers the drug spray nozzle, the sealing plug is arranged on the pen cap and blocks the small medicine outlet hole of the drug spray nozzle, the front end of the pen barrel is shaped to match and fixedly connected with the drug spray nozzle and the tail end is closed but there is a cavity for the movement of the push rod in the center, the piston is fixedly connected with the push rod, the cavity of the pen barrel between the piston and the small medicine outlet hole on the drug spray nozzle is the drug filling cavity, the spring is sleeved around the part of the push rod inside the pen barrel, one end is fixedly connected with the inner wall of the pen barrel, and the other end is connected with the piston, the safety cap is arranged outside the tail end of the pen barrel, a threaded hole is drilled at the center, and it engages with the thread arranged at the same position of the push rod.

[0006] Preferably, the aperture of the small medicine outlet hole is 0.1 - 0.3 mm, the sealing plug and the pen cap are integrally formed, and the piston and the push rod are integrally formed.

[0007] The present utility model has the following beneficial effects: The present utility model adopts a pen cap type design. There is a sealing plug at the center of the pen cap for sealing the spray head to prevent the drug from being contaminated in the non-use state; a spring is used as the power source to ensure that the piston can provide sufficient pressure to atomize the liquid medicine, significantly improving the consistency of the spray and the drug absorption effect; the tail of the push rod is fixed on the safety cap by a bolt. When in use, the safety cap is unscrewed to release the fixation of the push rod, and the spring pushes the piston to eject the drug. This design is not only simple in structure and convenient to operate, but also can ensure the safety and effectiveness of the drug. Description of the Drawings

[0008] Figure 1 is a schematic structural diagram of the present utility model;

[0009] Figure 2 is a diagram of the use process (opening the pen cap) of the present utility model;

[0010] Figure 3 is a diagram of the state after the use of the present utility model. Detailed Embodiments

[0011] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0012] Unless otherwise specified, the technical means adopted in this embodiment are conventional technical means in the art.

[0013] As Figure 1 shown, the pre-filled spray administration device of the present utility model includes a sealing plug 1, a pen cap 2, a pen barrel 3, a piston 4, a spring 5, a safety cap 6, a threaded hole 7, a push rod 8, a drug filling cavity 9 and a drug spray nozzle 10.

[0014] The drug spray nozzle 10 is a cone, and there is a drug outlet small hole with a diameter of 0.1 - 0.3 mm at the tip of the cone, which can turn the rapidly passing liquid into a mist. The pen cap 2 covers the drug spray nozzle 10. The sealing plug 1 is integrally formed with the pen cap 2 and is made of PE (polyethylene) plastic, blocking the drug spray nozzle 10 to play a sealing role. The pen barrel 3 is a cylindrical container made of PE, the front end shape is matched with and fixedly connected to the drug spray nozzle 10, and the tail end is closed but there is a cavity for the movement of the push rod 8 in the center. The piston 4 is a circular plastic sheet made of PE, with a rubber-made sealing ring, and is integrally formed with the push rod 8. The cavity of the pen barrel 3 between the piston 4 and the drug outlet small hole of the drug spray nozzle 10 is the drug filling cavity 9. The spring 5 is sleeved around the part of the push rod 8 inside the pen barrel 3, one end is fixed to the inner wall of the pen barrel 3, and the other end is connected to the piston 4. The safety cap 6 is a thick plastic sheet, connected outside the tail end of the pen barrel 3, with a threaded hole 7 drilled in the center, and is engaged with the thread provided at the same position of the push rod 8, so as to fix the position of the push rod 8 and the spring 5.

[0015] As Figure 2 and Figure 3 shown, when in use, align the drug spray nozzle 10 with the nostril, hold the pen barrel 3 with the left hand, and unscrew the safety cap 6 with the right hand. At this time, the push rod 8 loses its fixation, and the spring 5 pushes the piston 4 to the drug spray nozzle 10, and the liquid drug in the drug filling area 9 is immediately sprayed out to form droplets for people to inhale. After use, the pen cap 2 can seal the drug outlet small hole of the drug spray nozzle 10 to prevent the residual drug from being contaminated.

Claims

1. A novel pre-filled spray administration device, characterized in that: The spray administration device comprises a sealing plug (1), a pen cap (2), a pen barrel (3), a piston (4), a spring (5), a safety cap (6), a threaded hole (7), a push rod (8), a drug filling cavity (9) and a drug spout (10); a medicine outlet small hole is provided at the tip of the drug spout (10), the pen cap (2) covers the drug spout (10), the sealing plug (1) is arranged on the pen cap (2) and blocks the medicine outlet small hole of the drug spout (10), the front end shape of the pen barrel (3) is matched with and fixedly connected to the drug spout (10), and the tail end is closed but a cavity for the movement of the push rod (8) is left in the center. The piston (4) is fixedly connected to the push rod (8). The cavity of the pen barrel (3) between the piston (4) and the medicine outlet small hole on the drug spout (10) is the drug filling cavity (9). The spring (5) is sleeved around the part of the push rod (8) inside the pen barrel (3), one end is fixedly connected to the inner wall of the pen barrel (3), and the other end is connected to the piston (4). The safety cap (6) is arranged outside the tail end of the pen barrel (3), a threaded hole (7) is drilled at the center, and is engaged with the thread provided at the same position of the push rod (8).

2. The novel pre-filled spray administration device according to claim 1, characterized in that: The aperture of the medicine outlet small hole is 0.1 - 0.3 mm. The sealing plug (1) and the pen cap (2) are integrally formed. The piston (4) and the push rod (8) are integrally formed.

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