A glue-free ring-sealed sample collection and storage tube

Abstract

The technical solution of the present invention is a non-gasket sealed sample collection and storage tube, which includes a tube cap and a tube body that are threadedly engaged. A downwardly concave area is provided at the top of the tube cap, and an annular sealing rib is provided on the outer side of the downwardly concave area. An avoidance section is provided at the top inside of the tube body. During the process of screwing the tube cap into the tube body, the annular sealing rib freely crosses the avoidance section with clearance fit and then is in interference fit with the inner side wall of the tube body to achieve sealing. The structure of the present invention is novel, can achieve a good sealing effect, and at the same time omits the previous structure sealed by a sealing ring, can further reduce the initial bacteria, and reduces the cost.

Description

Technical Field

[0001] The present invention relates to a virus tube, and more particularly to a sample collection and storage tube without a rubber seal ring. Background Art

[0002] The collection, transportation, and storage of test samples are important issues faced in hospital clinical diagnosis. A sample collection and storage tube is an important disposable medical test consumable, with extremely high requirements for product sealing performance. The product structure and design should facilitate simple operation and use by medical staff, and should prevent or reduce the risk of passive infection for users.

[0003] Currently, among the common sample collection tubes on the market within the volume range of 5 - 15 ml, there is no sample collection tube that can meet the relevant airtightness requirements of sample collection and storage tubes without adding or using a sealing rubber ring. Summary of the Invention

[0004] In view of the above problems, the present invention aims to provide a sample collection and storage tube without a rubber seal ring, which has a unique and novel structure, and not only meets the sealing function required during the collection, transportation, and storage of test samples, but also reduces costs.

[0005] The technical solution of the present invention is a sample collection and storage tube without a rubber seal ring, including a tube cap and a tube body with a screwed - on thread fit. A downward - sunken area is provided at the top of the tube cap, and an annular sealing rib is provided on the outer side of the downward - sunken area. An avoidance section is provided at the top inside of the tube body. During the process of screwing the tube cap into the tube body, the annular sealing rib freely passes over the avoidance section with a clearance fit and then has an interference fit with the inner side wall of the tube body to achieve sealing.

[0006] Preferably, the outer diameter at the annular sealing rib is D1, the inner diameter of the tube body is D2, and the unilateral interference value at the annular sealing rib after the tube cap (1) is tightened is L, 0.1 ( ) ≤ L ≤ 0.3 ( ).

[0007] Preferably, the shape of the avoidance section at the top of the tube body is a straight step, an inclined angle, or an arc transition.

[0008] Preferably, the bottom surface of the downward - sunken area is sunken downward, with the lowest height at the center and the height gradually increasing from the center to the surrounding direction.

[0009] Preferably, the bottom surface of the downward - sunken area is a conical surface sunken downward at the center, or an arc - shaped surface sunken downward at the center, or a combination of a conical surface and an arc - shaped surface sunken downward at the center, or a combination of a conical surface and a plane sunken downward at the center, or a combination of an arc - shaped surface and a plane sunken downward at the center, or a combination of a conical surface, a plane, and an arc - shaped surface sunken downward at the center.

[0010] Preferably, the bottom surface of the concave area is a plane.

[0011] Preferably, the pouring point of the pipe cap is set at the center of the bottom surface of the concave area, and the thickness at the pouring point is the largest, with the thickness being 0.6 - 1.2 mm.

[0012] Preferably, when the annular sealing rib in the pipe cap crosses the bottom of the clearance section until it is completely tightened, the angle of rotation of the pipe cap relative to the pipe body is 10° - 20°.

[0013] Preferably, the annular sealing rib includes an upper inclined section, a middle sealing section, and a lower inclined section, and the height of the middle sealing section is 0.2 - 1.0 mm.

[0014] Preferably, a socket 9 for inserting a swab stick is provided at the center of the top of the inner wall of the pipe cap.

[0015] The threads at the pipe cap and the pipe body are double - headed threads.

[0016] The present invention improves the structure of the original sample collection and storage tube, omits the part of the sealing ring and the operations such as assembling the sealing ring, avoids the situation of contaminating the tube due to the contact of the sealing ring, and through the cooperation of structures such as the annular sealing rib and the depression of the bottom surface of the concave area, it can achieve the effect of no air leakage at a vacuum of - 95 kPa through testing. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural view of the present invention;

[0018] Figure 2 is Figure 1 a cross - sectional view along the A - A direction;

[0019] Figure 3 is a schematic structural view of the present invention in the state of interference fit between the annular sealing rib and the inner side wall of the pipe body when the pipe cap is tightened;

[0020] Figure 4 is Figure 2 a disassembled structural view of;

[0021] Figure 5 is Figure 4 a partial enlarged view at B in;

[0022] Figure 6 is Figure 4 a partial enlarged view of several specific structures at C in;

[0023] Figure 7 is a schematic view of several specific structures of the pipe cap in the present invention;

[0024] Figure 8Schematic diagram of the cap with a socket in the present invention;

[0025] Wherein: 1 - cap; 2 - tube body; 3 - concave area; 4 - annular sealing rib; 5 - clearance section; 6 - upper inclined section; 7 - middle sealing section; 8 - lower inclined section; 9 - socket. Specific embodiments

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] As Figures 1 to 7 shown, the present invention provides a virus sampling tube with rubber - ring - free sealing, including a cap 1 and a tube body 2 with a threaded fit. A downward - concave concave area 3 is provided at the top of the cap 1, and an annular sealing rib 4 is provided on the outer side of the concave area 3. A clearance section 5 is provided at the inner top of the tube body 2. During the process of screwing the cap 1 into the tube body 2, the annular sealing rib 4 freely crosses the clearance section 5 with a clearance fit and then has an interference fit with the inner wall of the tube body 2 to achieve sealing.

[0028] Preferably, the outer diameter at the annular sealing rib 4 is D1, and the inner diameter of the tube body 2 is D2. As Figure 3 shown, the unilateral interference value at the annular sealing rib 4 after the cap 1 is tightened is L, 0.1 ( ) ≤ L ≤ 0.3 ( ). After the cap 1 is screwed into the tube body 2, the annular sealing rib 4 enters the tube body 2. On the one hand, the tube body 2 will be extruded and deformed outwards, and on the other hand, the annular sealing rib 4 will be extruded and deformed inwards. Therefore, the actual interference amount after tightening is the theoretical interference amount within the range of 0.1 - 0.3.

[0029] Preferably, the shape of the clearance section 5 at the top of the tube body 2 is a straight step, an inclined angle, or an arc transition. As Figure 6 shown, the setting of the clearance section 5 is to allow a part of the cap 1 to be screwed into the tube body 2. At this time, the cap 1 is only subjected to the frictional force between the threads during the tightening process, and the resistance received by the tester during the tightening operation is small, and the screwing process is relatively smooth.

[0030] Preferably, the bottom surface of the concave area 3 is concave downwards, and the height at the center is the lowest, and the height gradually increases from the center to the surrounding direction. Specifically, the bottom surface of the concave area 3 can be a conical surface with a central downward concavity, or an arc surface with a central downward concavity, or a combination of a conical surface with a central downward concavity and an arc surface, or a combination of a conical surface with a central downward concavity and a plane, or a combination of an arc surface with a central downward concavity and a plane, or a combination of a conical surface, a plane, and an arc surface with a central downward concavity. As Figure 7As shown in the figure. The bottom surface of the concave area 3 is provided with a downward concave surface for the following two main reasons: First, it plays a guiding role during the tightening process, facilitating the smooth screwing of the cap 1 into the pipe body 2; Second, it plays a role of a reverse arc. When detecting the sealing performance, the present invention needs to be tightened and then placed in a vacuum negative pressure environment, specifically in a container with a vacuum negative pressure value of 95 kPa, to detect whether the seal of the present invention fails. The air in the pipe body 2 acts on the lower surface of the concave area 3, pushing the cap 1 outwards. Since the cap 1 and the pipe body 2 are connected together by threads and cannot be separated, the concave area 3 will deform upwards under the push of the air pressure in the pipe body 2, causing the inner cavity of the pipe body 2 to become larger and reducing the air pressure. And through the transmission of force on the bottom surface of the concave area 3 to the side surface of the concave area 3, during the deformation process, it will push the annular sealing rib 4 to further deform outwards and press against the inner side wall of the pipe body 2, further consolidating and improving the sealing effect.

[0031] Preferably, the bottom surface of the concave area 3 is a plane.

[0032] Preferably, the gate point of the cap 1 is set at the center of the bottom surface of the concave area 3. The thickness at the gate point is the largest, and the thickness is 0.6 - 1.2 mm. During the injection molding filling process, it ensures uniform filling, ensures isotropy, and can withstand a large air pressure during the subsequent vacuum sealing detection. When the concave area 3 deforms, it can ensure uniform deformation and ensure a good sealing effect.

[0033] Preferably, when the annular sealing rib 4 in the cap 1 passes over the bottom of the clearance section 5 of the pipe body until it is completely tightened, the rotation angle of the cap 1 relative to the pipe body 2 is 10° - 20°. This is suitable for most adults. From the feeling of bearing torque to tightening, the rotation angle between 10° and 20° is suitable for the hand feeling of most men and women, making the operation process of the tester comfortable and fast when tightening the cap 1.

[0034] Preferably, the annular sealing rib 4 includes an upper inclined section 6, a middle sealing section 7, and a lower inclined section 8. The height of the middle sealing section 7 is 0.2 - 1.0 mm. The sealing part with this height makes the annular sealing rib 4 and the inner side wall of the pipe body 2 form a sealing band in the shape of an annular strip with a certain height when sealing, ensuring the reliability of the seal.

[0035] As Figure 8 shown, preferably, a socket 9 for inserting a swab stick is provided at the center of the top of the inner wall of the cap 1, making this product a sample collection and storage tube with a self - contained swab collection stick. When collecting a sample, directly hold the cap 1 by hand and use the swab stick for collection.

[0036] In the technical solution of the present invention, two versions of caps, A and B, are provided: The cap of version A is as Figure 7As shown, there is no swab stick insertion structure, and the center of the tube cap is smooth without a socket. The tube cap of Version B, as Figure 8 shown, can meet the insertion needs of the sample collection swab. A circular insertion socket is added at the inner wall of the center of the tube cap to cooperate with the insertion of the swab stick or rod.

[0037] Preferably, the threads at the tube cap 1 and the tube body 2 are double-headed threads, making the process of tightening or loosening faster.

[0038] During use, open the tube cap 1, put the sampled specimen into the tube body 2, and tighten the tube cap 1 to store the sample, which can maintain an effective sealed state during storage and subsequent sample testing.

[0039] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A glue-free ring-sealed sample collection and storage tube, comprising a tube cap (1) and a tube body (2) with threaded fit, characterized in that: A concave area (3) is provided at the top of the pipe cap (1), and an annular sealing rib (4) is provided on the outer side of the concave area (3). An avoidance section (5) is provided at the inner top of the pipe body (2). During the process of screwing the pipe cap (1) into the pipe body (2), the annular sealing rib (4) freely passes over the avoidance section (5) with clearance fit and then is in interference fit with the inner wall of the pipe body (2) to achieve sealing; the outer diameter at the annular sealing rib (4) is D1, the inner diameter of the pipe body (2) is D2, and the unilateral interference value at the annular sealing rib (4) after the pipe cap (1) is tightened is L, where 0.1*(D1 - D2) / 2 ≤ L ≤ 0.3*(D1 - D2) / 2; the bottom surface of the concave area (3) is concave downward, with the lowest height at the center, and the height gradually increases from the center to the periphery; the pouring point of the pipe cap (1) is set at the center of the bottom surface of the concave area (3), and the thickness at the pouring point is the largest, with the thickness being 0.6 - 1.2 mm.

2. The non-rubber-ring-sealed sample collection and storage tube according to claim 1, characterized in that: The shape of the avoidance section (5) at the top of the pipe body (2) is a straight step, an inclined angle, or an arc transition.

3. The non-rubber-ring sealed sample collection and storage tube according to claim 1, characterized in that: The bottom surface of the concave area (3) is a conical surface concave downward at the center, or an arc surface concave downward at the center, or a combination of a conical surface and an arc surface concave downward at the center, or a combination of a conical surface and a plane concave downward at the center, or a combination of an arc surface and a plane concave downward at the center, or a combination of a conical surface, a plane, and an arc surface concave downward at the center.

4. A non-rubber-ring sealed sample collection and storage tube according to claim 1, characterized in that: During the process from when the annular sealing rib (4) in the pipe cap (1) passes over the bottom of the avoidance section (5) to being completely tightened, the rotation angle of the pipe cap (1) relative to the pipe body (2) is 10° - 20°.

5. A non-rubber-ring sealed sample collection and storage tube according to claim 1, characterized in that: The annular sealing rib (4) includes an upper inclined section (6), a middle sealing section (7), and a lower inclined section (8), and the height of the middle sealing section (7) is 0.2 - 1.0 mm.

6. The non-rubber-ring sealed sample collection and storage tube according to claim 1, wherein: A socket (9) for inserting a swab stick is provided at the center of the inner wall top of the pipe cap (1).

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