A vacuum blood collection tube with a cap that is easy to remove

Abstract

The technical solution of the utility model is a vacuum blood collection tube with a tube cap that can be easily removed, comprising a tube body, a rubber plug and a tube cap, wherein the tube cap is axially provided with a through hole, and an annular positioning rib is extended inwardly from the inner surface of the through hole at the upper part of the tube cap, and a series of wedge-shaped blocks are provided on the inner side wall of the tube cap above the annular positioning rib, and a plurality of clamping ribs that are closely fitted with the outer side wall of the tube body are vertically provided on the inner side wall of the tube cap below the annular positioning rib, and the rubber plug is inserted into the tube body through the through hole of the tube cap from top to bottom with interference fit, and the lower part of the rubber plug passes over the annular positioning rib and is inserted into the tube body and is interference fit with the inner side wall of the tube body. The utility model can avoid rotation between the tube cap and the rubber plug when rotating the tube cap, and at the same time drive the rubber plug to rotate relative to the tube body, so that the rubber plug can be smoothly pulled out through the tube cap.

Description

Technical Field

[0001] The utility model relates to a vacuum blood collection tube, in particular to a vacuum blood collection tube with a tube cap that can be easily removed. Background Art

[0002] The vacuum blood collection tube is a common tool in the blood collection process. Its structure mainly includes a tube body, a tube cap and a rubber plug, wherein the rubber plug is arranged in the tube cap, and the lower end of the rubber plug is inserted into the tube body to achieve sealing. When collecting blood, the blood collection needle is inserted into the rubber plug to reach the negative pressure tube body to realize automatic blood collection of human or animal. However, generally, the blood will not be tested immediately after the blood collection is completed, but it needs to be sorted and numbered and then transported. When it arrives at the testing place, the tube cap is removed for testing. The removal of the tube cap usually has a special instrument to rotate it first and then pull it out. Because the rubber plug itself has silicone oil attached to the surface, there is a good sealing between the rubber plug and the tube body. Although the rubber plug and the tube cap are in contact with each other by extrusion deformation, in the process of the instrument rotating the tube cap, the friction between the rubber plug and the tube body is greater than the friction between the rubber plug and the tube cap, which will cause the rubber plug and the tube cap to rotate, and ultimately the instrument cannot pull out the rubber plug smoothly. Utility Model Content

[0003] In view of the above problems, the utility model aims to provide a vacuum blood collection tube with an easily removable tube cap, which has a novel structure and is easy to use. When the tube cap is rotated, the rubber plug can be driven to rotate relative to the tube body, and the rubber plug can be smoothly pulled out through the tube cap.

[0004] The technical solution of the utility model is a vacuum blood collection tube with a tube cap that is easy to remove, comprising a tube body, a rubber plug and a tube cap, the tube cap is axially provided with a through hole, an annular positioning rib is extended inwardly from the inner surface of the through hole at the upper part of the tube cap, a series of wedge-shaped blocks are provided on the inner side wall of the tube cap above the annular positioning rib, a plurality of engaging ribs that are tightly fitted with the outer side wall of the tube body are vertically provided on the inner side wall of the tube cap below the annular positioning rib, the rubber plug is inserted into the through hole of the tube cap from top to bottom with interference fit, and the lower part of the rubber plug passes over the annular positioning rib and is inserted into the tube body and is interference fit with the inner side wall of the tube body.

[0005] Preferably, the wedge-shaped blocks are evenly distributed along the circumferential direction of the tube cap, and the thickness of the wedge-shaped blocks gradually increases in the counterclockwise direction.

[0006] Preferably, the transverse cross-section of the wedge-shaped block is triangular.

[0007] Preferably, the outer side surface of the pipe cap is vertically provided with alternating concave and convex corrugated surfaces.

[0008] The utility model can avoid rotation between the pipe cap and the rubber plug when the pipe cap is rotated, and at the same time drive the rubber plug to rotate relative to the pipe body, so that the rubber plug can be smoothly pulled out through the pipe cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 It is the front view of the utility model;

[0011] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0012] Figure 4 This is a schematic diagram of the exploded structure of the rubber plug and the pipe cap of the utility model;

[0013] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective;

[0014] Among them: 1 - pipe body; 2 - rubber plug; 3 - pipe cap; 4 - annular positioning rib; 5 - wedge block; 6 - locking rib. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0016] like Figures 1 to 5 As shown, the utility model provides a vacuum blood collection tube with an easily removable tube cap, comprising a tube body 1, a rubber plug 2 and a tube cap 3, wherein the tube cap 3 is axially provided with a through hole, an annular positioning rib 4 is extended inwardly from the inner surface of the through hole at the upper portion of the tube cap 3, a series of wedge-shaped blocks 5 are provided on the inner side wall of the tube cap 3 above the annular positioning rib 4, a plurality of engaging ribs 6 which are closely fitted with the outer side wall of the tube body 1 are vertically provided on the inner side wall of the tube cap 3 below the annular positioning rib 4, the rubber plug 2 is interference inserted into the through hole of the tube cap 3 from top to bottom, and the lower portion of the rubber plug 2 passes over the annular positioning rib 4 and is inserted into the tube body 1 and interference fits with the inner side wall of the tube body 1.

[0017] On the basis of the above solution, the wedge-shaped blocks 5 are evenly distributed along the circumferential direction of the tube cap 3, and the thickness of the wedge-shaped blocks 5 gradually increases in the counterclockwise direction.

[0018] Wherein, the transverse cross section of the wedge block 5 is a triangle.

[0019] Furthermore, the outer side surface of the pipe cap 3 is vertically provided with a corrugated surface with alternating concave and convex shapes.

[0020] When in use, the rubber plug 2 is inserted into the inner hole of the tube cap 3 and is limited circumferentially by the wedge block 5. When the tube cap 3 is twisted, the rubber plug 2 is deformed and blocked by the wedge block 5 and cannot rotate relative to the tube cap 3, so it rotates with the tube cap 3, thereby causing the rubber plug 2 to rotate relative to the inner wall of the tube body 1, breaking the initial maximum static friction force. After the rotation, it can be smoothly pulled out for subsequent blood testing.

[0021] The above description is only a preferred implementation mode of the utility model, and does not impose any form of limitation on the utility model. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the utility model still falls within the scope of the technical solution of the utility model.

Claims

1. A vacuum blood collection tube with a cap that can be easily removed, comprising a tube body (1), a rubber plug (2) and a tube cap (3), wherein the tube cap (3) is provided with a through hole in the axial direction, and characterized in that: An annular positioning rib (4) extends inwardly from the inner surface of the through hole at the top of the pipe cap (3); a series of wedge-shaped blocks (5) are arranged on the inner wall of the pipe cap (3) above the annular positioning rib (4); a plurality of engaging ribs (6) that are closely fitted with the outer wall of the pipe body (1) are vertically arranged on the inner wall of the pipe cap (3) below the annular positioning rib (4); the rubber plug (2) is inserted into the through hole of the pipe cap (3) from top to bottom through interference fit, and the lower part of the rubber plug (2) passes over the annular positioning rib (4) and is then inserted into the pipe body (1) and is interference fit with the inner wall of the pipe body (1).

2. A vacuum blood collection tube with an easily removable cap according to claim 1, characterized in that: The wedge-shaped blocks (5) are evenly distributed along the circumferential direction of the tube cap (3), and the thickness of the wedge-shaped blocks (5) gradually increases in the counterclockwise direction.

3. A vacuum blood collection tube with an easily removable cap according to claim 1, characterized in that: The transverse cross section of the wedge-shaped block (5) is triangular.

4. A vacuum blood collection tube with an easily removable cap according to claim 1, characterized in that: The outer side surface of the pipe cap (3) is vertically provided with a corrugated surface that alternates between concave and convex.

Images