Prefilled Syringe Assisted Push Device

Abstract

The present application discloses a prefilled syringe auxiliary propulsion device, which is composed of a protective cap, a hidden needle cap, a hidden needle spring, a hidden needle buckle, a bracket, a needle withdrawal spring, a snap-in piece, a shell, a needle withdrawal buckle, a cylinder and a push rod. Its advantages are as follows: the prefilled syringe auxiliary propulsion device of the present application is mainly used to assist in injection with a prefilled syringe, so that patients can use the prefilled syringe for self-injection and safe injection, thereby improving the injection comfort of patients. At the same time, the prefilled syringe auxiliary propulsion device of the present application also has a hidden needle function and an automatic needle withdrawal function, which can well reduce the patient's fear of needles and prevent the risk of secondary punctures.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to an auxiliary propulsion device for a prefilled syringe. Background Art

[0002] The traditional "medicine bottle + syringe" injection method requires users to extract the liquid medicine from the medicine bottle before injecting it, while the prefilled syringe integrates "drug storage" and "injection function" into one, so users can inject directly. Prefilled syringes are widely recognized and used for their significant advantages such as accurate medication, high liquid medicine utilization rate, safe and convenient drug administration, and are currently mainly used for the packaging of high-value products. However, patients still have certain difficulties in using prefilled syringes for self-injection, and both safety and comfort need to be improved. Summary of the invention

[0003] The present application provides an auxiliary propulsion device for a prefilled syringe.

[0004] The embodiment of the present application adopts the following technical scheme: an auxiliary propulsion device for a prefilled syringe, comprising a protective cap, a hidden needle cap, a hidden needle spring, a hidden needle buckle, a bracket, a needle withdrawal spring, a snap-in piece, a shell, a needle withdrawal buckle, a cylinder and a push rod, the hidden needle cap being a hollow structure, the hidden needle cap being provided with a hidden needle spring, the hidden needle cap being snapped into the hidden needle buckle, the hidden needle buckle being connected to the bracket, the protective cap being covered on the bracket, the inner side of the bracket being provided with a circle of annular protrusions, the outer side of the snap-in piece being provided with a needle withdrawal spring, the head end of the snap-in piece being snapped onto the annular protrusion of the bracket, the head end of the shell being connected to the tail end of the bracket, the shell being loaded with a cylinder, the tail end of the shell being snapped into the needle withdrawal buckle, the needle withdrawal buckle being provided with a spring sheet, the needle withdrawal buckle being provided with a through hole, and the push rod being inserted into the through hole of the needle withdrawal buckle.

[0005] Preferably, the support is a hollow structure.

[0006] Preferably, the support is tubular.

[0007] Preferably, the bracket is connected to the housing via threads.

[0008] Preferably, the outer diameter of the head end of the push rod is larger than the inner diameter of the through hole of the needle withdrawal buckle.

[0009] The beneficial effects of this application are as follows:

[0010] The prefilled syringe auxiliary propulsion device of the present application is mainly used to assist injection with a prefilled syringe, so that patients can use the prefilled syringe for self-injection and safe injection, thereby improving the injection comfort of patients. At the same time, the prefilled syringe auxiliary propulsion device of the present application also has a needle hiding function and an automatic needle withdrawal function, which can well reduce the patient's fear of needles and prevent the risk of secondary puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0012] Figure 1 Schematic diagram of the structure of a prefilled syringe.

[0013] Figure 2 It is a schematic diagram of the structure of the auxiliary propulsion device of the prefilled syringe.

[0014] Figure 3 Schematic diagram of the explosion of the auxiliary propulsion device for prefilled syringes.

[0015] Figure 4 It is a schematic diagram of the structure of the hidden needle cap.

[0016] Figure 5 It is a schematic diagram of the structure of the hidden needle buckle.

[0017] Figure 6 A schematic diagram of the structure of the bracket.

[0018] Figure 7 It is a structural schematic diagram of the card-in component.

[0019] Figure 8 It is a schematic diagram of the structure of the needle withdrawal buckle.

[0020] Fig. 9 It is a schematic diagram of the structure of the cylinder.

[0021] The following are the descriptions of the reference numerals:

[0022] 1. Protective cap, 2. Hidden needle cap, 3. Hidden needle spring, 4. Hidden needle buckle, 5. Bracket, 6. Needle withdrawal spring, 7. Snap-in part, 8. Shell, 9. Needle withdrawal buckle, 10. Cylinder, 11. Push rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0024] The present application provides a prefilled syringe auxiliary propulsion device, which consists of a protective cap 1, a hidden needle cap 2, a hidden needle spring 3, a hidden needle buckle 4, a bracket 5, a needle withdrawal spring 6, a snap-in piece 7, a shell 8, a needle withdrawal buckle 9, a cylinder 10, and a push rod 11.

[0025] The hidden needle cap 2 is a hollow structure. A hidden needle spring 3 is mounted on the hidden needle cap 2. The hidden needle cap 2 is inserted into the hidden needle buckle 4. Under the elastic force of the hidden needle spring 3, the hidden needle cap 2 extends forward. Under the action of external force, the hidden needle cap 2 retracts backward. The hidden needle buckle 4 is connected to the bracket 5. The specific connection between the hidden needle buckle 4 and the bracket 5 can be a clamping connection, a threaded connection, etc. The protective cap 1 is covered on the bracket 5. In order to facilitate the observation of the internal situation of the bracket 5, the bracket 5 can be set as a hollow structure or a transparent material. The bracket 5 is tubular, and the rear end of the bracket 5 is provided with an external thread for connecting to the shell 8. A circle of annular protrusions is provided on the inner side of the bracket 5. The outer side of the clamping member 7 is covered with a needle withdrawal spring 6. The head end of the clamping member 7 is clamped on the annular protrusion of the bracket 5. The head end of the shell 8 is connected to the bracket 5 through an internal thread. The cylinder 10 is installed in the shell 8, and the tail end of the shell 8 is clamped into the needle withdrawal buckle 9. The needle withdrawal buckle 9 is provided with a spring sheet, and the needle withdrawal buckle 9 is provided with a through hole, and a push rod 11 is inserted into the through hole of the needle withdrawal buckle 9. In order to prevent the push rod 11 from slipping out, the outer diameter of the head end of the push rod 11 is larger than the inner diameter of the through hole of the needle withdrawal buckle 9.

[0026] Directions:

[0027] The protective cap 1 is removed from the bracket 5 , and the bracket 5 is removed from the housing 8 .

[0028] The prefilled syringe is loaded into the bracket 5, and the push rod 11 is pulled back to the maximum stroke.

[0029] The bracket 5 and the housing 8 are tightened, and at this time, the needle withdrawal spring 6 is compressed.

[0030] The needle cap of the prefilled syringe is taken off for injection, the needle is inserted into the human body, the hidden needle spring 3 is compressed, the hidden needle cap 2 is contracted, and the push rod 11 is pressed to inject the drug.

[0031] After the push rod 11 is pushed to the bottom, the needle withdrawal buckle 9 is triggered to open, and the needle withdrawal spring 6 springs up to push the needle of the prefilled syringe out of the skin.

[0032] The support 5 is removed from the housing 8, the prefilled syringe is taken out, the needle cap is covered on the prefilled syringe, and the auxiliary propulsion device of the prefilled syringe is reassembled.

[0033] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A prefilled syringe auxiliary propulsion device, characterized in that: It consists of a protective cap, a hidden needle cap, a hidden needle spring, a hidden needle buckle, a bracket, a needle withdrawal spring, a snap-in piece, a shell, a needle withdrawal buckle, a cylinder and a push rod. The hidden needle cap is a hollow structure, and a hidden needle spring is mounted on the hidden needle cap. The hidden needle cap is inserted into the hidden needle buckle, and the hidden needle buckle is connected to the bracket. A protective cap is covered on the bracket. A circle of annular protrusions is provided on the inner side of the bracket, and a needle withdrawal spring is sleeved on the outside of the clamping piece. The head end of the clamping piece is clamped on the annular protrusion of the bracket, and the head end of the shell is connected to the tail end of the bracket. A cylinder is installed in the shell, and the tail end of the shell is clamped in the needle withdrawal buckle. A spring sheet is provided on the needle withdrawal buckle, and a through hole is provided on the needle withdrawal buckle. The push rod is inserted into the through hole of the needle withdrawal buckle.

2. The auxiliary propulsion device for prefilled syringes according to claim 1, characterized in that: The support is a hollow structure.

3. The auxiliary propulsion device for prefilled syringes according to claim 1, characterized in that: The support is tubular.

4. The auxiliary propulsion device for prefilled syringes according to claim 1, characterized in that: The bracket is connected to the shell through threads.

5. The auxiliary propulsion device for prefilled syringes according to claim 1, characterized in that: The outer diameter of the head end of the push rod is larger than the inner diameter of the through hole of the needle withdrawal buckle.

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