Splash-proof vacuum blood collection tube

Abstract

The utility model discloses a splash-proof vacuum blood collection tube which comprises a vacuum tube, the top of the vacuum tube is in threaded connection with a head cover, the top of the head cover is provided with a through hole, a sliding block is movably inserted in the through hole, the bottom of the sliding block is provided with a bottom groove, the inner wall of the bottom groove is provided with a round hole, and the head cover is provided with an air inlet hole. By arranging the sliding block and the limiting mechanism on the head cover, when a medical worker needs to take down the head cover to extract blood, the push handle can be pushed to move towards the middle of the head cover firstly, after the part, located at the bottom of the clamping block, of the push handle slides out of the bottom of the clamping block, the sliding block can move downwards due to the action of external atmospheric pressure, and the round hole can be communicated with the air inlet hole; therefore, outside air enters the vacuum tube through the air inlet hole, the round hole and the bottom groove to achieve pressure relief, then medical staff take down the head cover, the blood splashing phenomenon cannot occur, and the blood pressure relief device has the advantages that pressure is relieved in advance, and blood splashing is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of blood collection tubes, in particular to a splash-proof vacuum blood collection tube. Background Art

[0002] A vacuum blood collection tube is a disposable, negative-pressure vacuum tube that is convenient for blood collection. It needs to be used with a venous blood collection needle. The principle of a vacuum blood collection tube is to pre-evacuate the blood collection tube with a head cap to a certain degree of vacuum, and use its negative pressure to automatically collect venous blood samples. After one end of the blood collection needle is inserted into the human vein, the other end is inserted into the rubber stopper of the vacuum blood collection tube. The human venous blood is inside the vacuum blood collection tube and, under the action of negative pressure, is drawn into the blood sample container through the blood collection needle.

[0003] However, there are some problems with the prior art: since the blood collection tube body storing the blood is in a reduced pressure vacuum state, when medical staff open the cap to extract the blood sample, the outside air will be quickly sucked into the tube due to the external atmospheric pressure, which can easily cause the blood sample in the tube to be squeezed by the influx of gas and splash to the outside, which may cause environmental pollution and even infect medical staff. Therefore, we propose a splash-proof vacuum blood collection tube. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a splash-proof vacuum blood collection tube, which can release pressure in advance to avoid blood splashing by providing an air inlet hole.

[0005] The utility model is implemented as follows: a splash-proof vacuum blood collection tube comprises a vacuum tube, the top of the vacuum tube is threadedly connected with a head cover, the top of the head cover is provided with a through hole, a slider is movably inserted inside the through hole, the bottom of the slider is provided with a bottom groove, the inner wall of the bottom groove is provided with a circular hole, an air inlet is provided on the head cover, one end of the air inlet is communicated with the outside, and the other end is blocked by the inner wall of the bottom groove, a limiting mechanism is provided on the top of the head cover, and the limiting mechanism is used to clamp the slider.

[0006] Optionally, a filter element is fixedly installed in the inner cavity of the air inlet hole, and the diameter of the filter element is the same as the inner diameter of the air inlet hole.

[0007] Optionally, the limiting mechanism includes a block, which is fixedly mounted on the top of the head cover, a guide rod movably inserted into the block, the other end of the guide rod is fixedly connected to a push handle, a spring is movably sleeved on the outer surface of the guide rod, and both ends of the spring are respectively fixedly connected to the surface of the block and the push handle.

[0008] Optionally, a clamping block is fixedly mounted on a side of the sliding block away from the block, and a notch is formed between the clamping block and the head cover.

[0009] Optionally, the head cover includes a top hole, which is opened at the top of the head cover, and a rubber plug is fixedly installed on the top of the inner wall of the head cover, and the top of the rubber plug is exposed to the outside through the top hole.

[0010] Optionally, the diameter of the top of the rubber plug is the same as the outer diameter of the vacuum tube, and the diameter of the bottom of the rubber plug is the same as the inner diameter of the vacuum tube.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] By arranging a slider and a limit mechanism on the head cover, when medical staff need to remove the head cover to extract blood, they can first push the push handle to move toward the middle of the head cover. When the part of the push handle located at the bottom of the card block slides out from the bottom of the card block, the slider will move downward due to the external atmospheric pressure, and the circular hole will be connected to the air inlet, so that the outside air can enter the vacuum tube through the air inlet, the circular hole and the bottom groove to achieve pressure relief. Then, when the medical staff removes the head cover again, blood will not splash.

[0013] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a structural schematic diagram provided by the utility model.

[0016] Figure 2 It is a top schematic diagram provided by the utility model.

[0017] Figure 3 It is a front partial sectional schematic diagram provided by the utility model.

[0018] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A in the middle.

[0019] Figure 5 It is a partial cross-sectional schematic diagram of the vacuum tube provided by the utility model after pressure relief.

[0020] In the figure: 1 vacuum tube; 2 head cover; 201 top hole; 202 rubber plug; 3 through hole; 4 slider; 5 bottom groove; 6 round hole; 7 air inlet hole; 8 limit mechanism; 801 block; 802 guide rod; 803 push handle; 804 spring; 9 filter element; 10 card block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figures 1 to 5 As shown, a splash-proof vacuum blood collection tube provided by an embodiment of the utility model comprises a vacuum tube 1, a head cover 2 is threadedly connected to the top of the vacuum tube 1, a through hole 3 is provided on the top of the head cover 2, a slider 4 is movably inserted inside the through hole 3, a bottom groove 5 is provided at the bottom of the slider 4, a circular hole 6 is provided on the inner wall of the bottom groove 5, an air inlet hole 7 is provided on the head cover 2, one end of the air inlet hole 7 is communicated with the outside, and the other end is blocked by the inner wall of the bottom groove 5, a limiting mechanism 8 is provided on the top of the head cover 2, and the limiting mechanism 8 is used to clamp the slider 4.

[0023] Furthermore, a filter element 9 is fixedly installed in the inner cavity of the air inlet 7, and the diameter of the filter element 9 is the same as the inner diameter of the air inlet 7. Through the design of the filter element 9, impurities in the external air can be prevented from being sucked into the vacuum tube 1 to contaminate the blood sample during pressure relief.

[0024] Furthermore, the limiting mechanism 8 includes a block 801, which is fixedly mounted on the top of the head cover 2, a guide rod 802 is movably inserted on the block 801, a push handle 803 is fixedly connected to the other end of the guide rod 802, a spring 804 is movably sleeved on the outer surface of the guide rod 802, and the two ends of the spring 804 are respectively fixedly connected to the surface of the block 801 and the push handle 803. By setting the spring 804 to a compressed state, due to the elastic force recovery effect of the spring 804, the guide rod 802 will tend to move away from the slider 4.

[0025] Furthermore, a block 10 is fixedly mounted on one side of the slider 4 away from the block 801, and a notch is formed between the block 10 and the head cover 2. Due to the elastic force of the spring 804, the end of the push handle 803 close to the block 10 will be kept in the notch between the block 10 and the head cover 2. At the same time, due to the effect of the atmospheric pressure outside the vacuum tube 1, the slider 4 will tend to move downward. If the medical staff pushes the push handle 803 to move toward the middle of the head cover 2, the limit on the slider 4 will be released, so that the slider 4 moves downward, the circular hole 6 is connected with the air inlet 7, and the outside air enters the vacuum tube 1 through the air inlet 7, the circular hole 6 and the bottom groove 5, thereby realizing the pressure relief operation.

[0026] Furthermore, the head cover 2 includes a top hole 201, which is opened at the top of the head cover 2. A rubber plug 202 is fixedly installed at the top of the inner wall of the head cover 2, and the top of the rubber plug 202 is exposed to the outside through the top hole 201. Medical staff can insert a blood collection needle from the top of the rubber plug 202, so that blood flows into the vacuum tube 1 to achieve a blood collection operation.

[0027] Furthermore, the diameter of the top of the rubber plug 202 is the same as the outer diameter of the vacuum tube 1, and the diameter of the bottom of the rubber plug 202 is the same as the inner diameter of the vacuum tube 1. By designing the rubber plug 202 with different diameters at the top and bottom, the bottom area of ​​the rubber plug 202 can be inserted into the inner cavity of the vacuum tube 1, and the top area is compacted between the vacuum tube 1 and the head cover 2 after the head cover 2 is tightened, thereby achieving a better sealing effect.

[0028] Working principle: When the medical staff needs to remove the head cover 2 to extract blood, they can first push the push handle 803 to compress the spring 804 so that the push handle 803 moves toward the middle of the head cover 2. When the part of the push handle 803 that contacts the bottom of the block 10 slides out from the bottom of the block 10, the slider 4 moves downward due to the external atmospheric pressure, so that the circular hole 6 will be connected to the air inlet 7. Figure 4 As shown, the outside air enters the vacuum tube 1 through the air inlet 7, the circular hole 6 and the bottom groove 5 to achieve pressure relief. At the same time, the filter element 9 will filter impurities in the air. After the pressure inside and outside the vacuum tube 1 is balanced, the medical staff will not cause blood splashing when removing the head cover 2.

[0029] The above embodiments are only used to help understand the method and core idea of ​​the utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A splash-proof vacuum blood collection tube, comprising a vacuum tube (1), characterized in that: The top of the vacuum tube (1) is threadedly connected to a head cover (2), a through hole (3) is provided on the top of the head cover (2), a slider (4) is movably inserted inside the through hole (3), a bottom groove (5) is provided at the bottom of the slider (4), a round hole (6) is provided on the inner wall of the bottom groove (5), an air inlet (7) is provided on the head cover (2), one end of the air inlet (7) is communicated with the outside, and the other end is blocked by the inner wall of the bottom groove (5), and a limiting mechanism (8) is provided on the top of the head cover (2), and the limiting mechanism (8) is used to clamp the slider (4).

2. The splash-proof vacuum blood collection tube according to claim 1, characterized in that: A filter element (9) is fixedly mounted in the inner cavity of the air inlet hole (7); the diameter of the filter element (9) is the same as the inner diameter of the air inlet hole (7).

3. The splash-proof vacuum blood collection tube according to claim 1, characterized in that: The limiting mechanism (8) comprises a block (801), the block (801) being fixedly mounted on the top of the head cover (2), a guide rod (802) being movably inserted into the block (801), the other end of the guide rod (802) being fixedly connected to a push handle (803), a spring (804) being movably sleeved on the outer surface of the guide rod (802), and the two ends of the spring (804) being fixedly connected to the surface of the block (801) and the push handle (803), respectively.

4. The splash-proof vacuum blood collection tube according to claim 1, characterized in that: A clamping block (10) is fixedly mounted on a side of the sliding block (4) away from the block (801), and a notch is formed between the clamping block (10) and the head cover (2).

5. The splash-proof vacuum blood collection tube according to claim 1, characterized in that: The head cover (2) comprises a top hole (201), wherein the top hole (201) is opened at the top of the head cover (2), a rubber plug (202) is fixedly mounted on the top of the inner wall of the head cover (2), and the top of the rubber plug (202) is exposed to the outside through the top hole (201).

6. The splash-proof vacuum blood collection tube according to claim 5, characterized in that: The diameter of the top of the rubber plug (202) is the same as the outer diameter of the vacuum tube (1), and the diameter of the bottom of the rubber plug (202) is the same as the inner diameter of the vacuum tube (1).

Images