Anti-slosh syringe plunger

Abstract

The utility model discloses a kind of anti-shaking syringe push rod, its stem is equipped with the fixed part of protruding, the vertex of the fixed part is contacted with the inner wall of syringe needle tube;Several fixed parts on the radial section of the stem constitute a group of fixed parts, and several groups of fixed parts can prevent syringe push rod from shaking in the whole process of injection, which helps to improve injection experience and safety.

Description

Technical Field

[0001] This utility model relates to a syringe plunger, and more particularly to a syringe plunger that prevents shaking. Background Technology

[0002] The syringe plunger is the component in a syringe that connects to the piston. By pushing or pulling the plunger, liquid can be drawn into or expelled from the syringe. Due to the large gap between the plunger and the inner wall of the syringe, the plunger is prone to wobbling during injection, resulting in increased pushing force and affecting the injection experience. Utility Model Content

[0003] Purpose of the utility model: The purpose of this utility model is to provide a syringe plunger that can prevent shaking when injecting liquid medicine.

[0004] Technical solution: The anti-shake syringe plunger includes a rod body, on which a fixing part is provided. The fixing part is a protruding structure on the rod body, and the apex of the protruding structure contacts the inner wall of the syringe needle tube. On a radial cross section of the rod body, several fixing parts constitute a set of fixing members. Several sets of fixing members are provided on the rod body to prevent the syringe plunger from shaking.

[0005] Since the fixing part is in contact with the inner wall of the syringe needle, it occupies the space where the plunger might have shaken, thus keeping the gap between the syringe plunger and the inner wall of the needle to a minimum. The several sets of fixing parts set on multiple radial sections of the plunger can ensure that the plunger axis and the needle axis always coincide throughout the injection process, thereby preventing the plunger from shaking.

[0006] The rod body is preferably equipped with fins. The fins do not contact the inner wall of the syringe needle and their main function is to enhance the structural strength and stability of the syringe plunger. A common syringe plunger has four fins with a cross-shaped radial cross section.

[0007] The fixing part is preferably disposed on the fin. Compared with the fixing part being disposed on the rod body, it is beneficial to save materials and reduce costs by disposing of the fixing part on the fin.

[0008] The fixing part is preferably arc-shaped. The apex of the arc contacts the inner wall of the syringe needle, which can prevent the plunger from shaking and also prevent excessive injection resistance due to a large contact area.

[0009] The rod and the fixing part are preferably integrally injection molded.

[0010] This invention also provides a pre-filled syringe including the syringe plunger.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following advantages: The present invention can prevent the syringe plunger from shaking during the entire process of assembling or injecting the drug solution, thereby improving the injection experience and safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the novel push rod;

[0013] Figure 2 This is a schematic diagram showing the new type of push rod in use in conjunction with the syringe needle. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0015] Example 1

[0016] One such Figure 1 The syringe plunger shown is described. The syringe plunger includes a rod body with four fins, and the radial cross-section of the rod body is cross-shaped. Each fin has an arc-shaped protrusion for fixing, the apex of which contacts the inner wall of the syringe needle tube 2. On one radial cross-section of the rod body, the fixing portions 1 on the four fins together form a set of fixing members; and several sets of these fixing members are provided on the rod body.

[0017] like Figure 2 As shown, when injecting medication, the axis of the syringe plunger will always coincide with the axis of the syringe tube, so the plunger will not wobble.

[0018] Example 2

[0019] A pre-filled syringe. The pre-filled syringe uses the syringe plunger described in Example 1.

Claims

1. A wobbling-resistant syringe plunger, comprising a plunger body, characterized in that, The rod body is provided with a fixing part (1), the fixing part (1) is a protruding structure on the rod body, and the apex of the protruding structure is in contact with the inner wall of the syringe needle tube (2); on a radial section of the rod body, several fixing parts (1) constitute a set of fixing members; several sets of fixing members are provided on the rod body to prevent the syringe plunger from shaking.

2. The syringe plunger according to claim 1, characterized in that, The rod is equipped with fins.

3. The syringe plunger according to claim 2, characterized in that, The fixing part (1) is provided on the fin.

4. The syringe plunger according to claim 3, characterized in that, The fixing part (1) is arc-shaped.

5. The syringe plunger according to claim 1, characterized in that, The rod and the fixing part (1) are integrally injection molded.

6. A pre-filled syringe comprising the syringe plunger according to any one of claims 1-5.

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