Vein blood collection tube capable of preventing blood from splashing out and convenient to fix
By designing the barrier structure of the rubber sleeve and the pore fit of the hole cover and the barrier ring in the venous blood collection vessel, the problems of blood splashing and hand slipping contamination during the blood collection process are solved, and a safer and more accurate blood collection process is achieved.
Patent Information
- Application Number
- CN202411939974.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-02-28
AI Technical Summary
The existing venous blood collection vessels are prone to blood splashing due to negative pressure during blood collection, and are prone to slipping hands and contamination when inserting blood collection needles.
A venous blood collection tube that prevents blood splashing is designed to prevent blood from being splashed and fixes. The rubber sleeve cooperates with the pores of the hole cover, and the internal negative pressure and the external air pressure are used to avoid the negative pressure inside the blood collection tube being affected; at the same time, the finger position of medical staff is blocked through the barrier ring to avoid hand slippery contamination.
It effectively avoids blood splashing, improves the safety and accuracy of the blood collection process, reduces the risk of contamination, and ensures the quality of blood testing.
Smart Images
Figure CN119523479A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of blood collection tubes, in particular to a venous blood collection tube which is convenient to fix and prevents blood from splashing. Background Art
[0002] At present, venous blood collection tubes are containers used to collect human venous blood samples during medical examinations. Venous blood collection tubes are usually composed of a tube body, a tube cap, additives (some blood collection tubes contain additives), etc. The tube body is generally made of transparent glass or plastic. Glass blood collection tubes have good chemical stability and transparency, which is conducive to observing the blood sample. The tube caps have different colors, and different colors represent the types and uses of additives contained in the tube, which is convenient for medical staff to quickly identify and distinguish; Under normal circumstances, the inside of the blood collection tube is in a negative pressure state, so that blood can flow smoothly into the tube under the combined action of venous pressure and the negative pressure of the blood collection tube. When the negative pressure state inside the blood collection tube is destroyed, the power of blood to flow into the blood collection tube is insufficient and it may accumulate at the connection between the blood collection needle and the blood collection tube. When the pressure accumulates to a certain level or there is a slight external force interference, blood will splash out. Summary of the invention
[0003] To achieve the above objectives, the present invention is implemented through the following technical solutions: a venous blood collection tube that prevents blood from splashing and is easy to fix, comprising: A tube body, the tube body having a space for storing blood, and a tube cover is installed on the top of the tube body; A gasket is installed inside the tube cover, and the tube cover and the gasket cooperate to seal the tube body, and a dust cover is installed on the top of the tube cover; The tube cover comprises a threaded ring, a hole cover is fixedly installed on the top of the threaded ring, and air holes are evenly opened at the bottom of the outer side of the hole cover, the inner wall of the threaded ring is provided with threads, and the inner wall of the threaded ring is threadedly connected with the top of the outer side of the tube body, the top of the outer side of the hole cover is evenly provided with convex strips along the center of the circle, and the bottom of the inner wall of the hole cover is provided with an inner groove, and a rubber sleeve is fixedly installed at the inner groove of the hole cover, and the rubber sleeve cooperates with the air hole of the hole cover, and the gasket is squeezed during the blood collection process, so that a gap appears between the gasket and the tube body, and a pressure difference appears on the inside and outside of the rubber sleeve, and the internal negative pressure cooperates with the external air pressure, and the rubber sleeve is squeezed inwardly and tightly against the tube body through the external air pressure, so as to avoid the negative pressure inside the blood collection tube being affected, so that a large amount of blood in the blood collection needle is stored in the connection position between the blood collection needle and the blood collection tube, causing blood splashing when it is pulled out, and the inner wall of the rubber sleeve is tightly fitted with the outer side of the tube body, and the air hole is located on the outside of the rubber sleeve.
[0004] A ring groove is provided at the bottom of the threaded ring, and a rubber ring is fixedly installed at the ring groove of the threaded ring. The rubber ring and the bottom of the threaded ring are tightly fitted with the tube body. A ring clamping groove is provided at the top of the inner wall of the hole cover. The hole cover is fixedly connected with the gasket through the ring clamping groove, and a barrier ring is fixedly installed on the top of the hole cover. The barrier ring blocks the position of the medical staff's fingers when the medical staff inserts the blood collection needle into the blood collection tube to prevent the medical staff from slipping during insertion and causing the fingers to contact the gasket, causing contamination to the blood collection tube and affecting the collected blood detection. The top of the barrier ring is arc-shaped, and the outer side of the barrier ring is clamped with the inner wall of the dust cover.
[0005] The tube body comprises a hollow tube, the interior of the hollow tube has a storage space, and a side clamp is fixedly installed at the bottom of the outer side of the hollow tube, and the side clamp is evenly installed along the center position of the hollow tube, and a thread is opened on the outer side of the hollow tube, and the hollow tube is threadedly connected to the inner wall of the threaded ring through the thread, and a limiting ring is fixedly installed on the outer side of the hollow tube, and the limiting ring cooperates with the convex ring. After the installation and connection, the convex ring squeezes the rubber ring into the ring groove of the threaded ring, thereby increasing the contact pressure and closing the gap, and at the same time, the convex ring forms a tortuosity at the gap position, so that dust and air are blocked by the tortuous path after entering the gap, thereby improving the sealing effect, and the outer side of the hollow tube is symmetrically provided with anti-skid grooves, and the anti-skid grooves are located below the limiting ring.
[0006] A convex ring is fixedly installed on the top of the limiting ring, and the top of the convex ring is tightly fitted with the bottom of the rubber ring, and the top of the limiting ring is tightly fitted with the bottom of the threaded ring. A support plate is fixedly installed on the top of the inner wall of the hollow tube, and the inner wall of the support plate cooperates with the support ring to make the inner wall of the support plate fit tightly with the outer side of the gasket, thereby improving the sealing effect and positioning the gasket at the same time. During the insertion of the blood collection needle, the gasket is positioned to avoid the gasket shifting and causing a gap between the tube body, which affects the internal negative pressure of the blood collection tube. A through hole is opened at the center of the top of the support plate, and the top of the support plate is tightly fitted with the bottom of the gasket.
[0007] The gasket includes an outer ring disk, the outer side of which is fixedly provided with a clamping ring, and the outer ring disk is fixedly connected to the ring clamping groove of the hole cover through the clamping ring, the bottom of the outer ring disk is tightly fitted with the top of the support disk, and the inner wall of the outer ring disk is fixedly provided with an inner gasket ring, the bottom of the outer side of the inner gasket ring is tightly fitted with the inner wall of the support disk, and the top of the inner gasket ring is a conical surface that is concave downward at the center position, and a guide block is fixedly installed at the conical surface of the inner gasket ring, and the blood collection needle is smoothly inserted along the center position through the conical surface at the top of the inner gasket ring and the guide block. At the same time, the thickness of the center position of the inner gasket ring is lower in combination with the groove at the bottom of the inner gasket ring, thereby reducing the difficulty of inserting the blood collection needle into the blood collection tube, and the guide block is evenly installed along the center position of the inner gasket ring, the bottom of the inner gasket ring is provided with a groove, and the inner diameter gradually increases from top to bottom, the top of the inner gasket ring is clamped with a concave ring groove, and a support ring is fixedly installed at the concave ring groove of the inner gasket ring.
[0008] Preferably, as described.
[0009] The present invention provides a venous blood collection tube that prevents blood from splashing and is easy to fix. It has the following beneficial effects: 1. The blood-spatter-proof and conveniently fixed venous blood collection tube cooperates with the air hole of the rubber sleeve and the hole cover. During the blood collection process, the gasket is squeezed to form a gap between the gasket and the tube body. A pressure difference occurs between the inside and outside of the rubber sleeve. The internal negative pressure cooperates with the external air pressure, and the rubber sleeve is squeezed inwardly to fit the tube body through the external air pressure, so that the negative pressure inside the blood collection tube is not affected, so that a large amount of blood in the blood collection needle is stored at the connection position between the blood collection needle and the blood collection tube, causing blood splashing when the blood is pulled out.
[0010] Second, the blood-spatter-proof and conveniently fixed venous blood collection tube can block the finger position of the medical staff to a certain extent during the process of the medical staff inserting the blood collection needle into the blood collection tube through the barrier ring, so as to prevent the medical staff from slipping during the insertion and causing the finger to contact the pad, thereby contaminating the blood collection tube and affecting the detection of the collected blood.
[0011] 3. The venous blood collection tube which is convenient to fix and prevents blood from splashing is matched with a limit ring and a convex ring. After installation and connection, the convex ring squeezes the rubber ring into the ring groove of the threaded ring to increase the contact pressure and close the gap. At the same time, the convex ring forms a tortuosity at the gap position, so that dust and air are blocked by the tortuous path after entering the gap, thereby improving the sealing effect.
[0012] Fourth, the blood-spatter-proof and easy-to-fix venous blood collection tube cooperates with the inner wall of the support disk and the support ring so that the inner wall of the support disk is closely fitted with the outer side of the gasket, thereby improving the sealing effect and positioning the gasket at the same time. The gasket is positioned during the insertion of the blood collection needle to avoid the gasket shifting and causing a gap between the gasket and the tube body, thereby affecting the internal negative pressure of the blood collection tube.
[0013] 5. The venous blood collection tube that prevents blood from splashing and is easy to fix can make the blood collection needle smoothly inserted along the center position through the cooperation of the conical surface on the top of the inner gasket ring and the guide block. At the same time, the groove at the bottom of the inner gasket ring makes the thickness of the center position of the inner gasket ring lower, thereby reducing the difficulty of inserting the blood collection needle into the blood collection tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the external structure of a venous blood collection tube that is easy to fix and prevents blood from splashing; Figure 2 This is a structural anatomical diagram of a venous blood collection tube that is easy to fix and prevents blood from splashing, according to the present invention; Figure 3 This is a dissected diagram of the tube structure of the present invention; Figure 4 This is a schematic diagram of the pipe cover structure of the present invention; Figure 5 This is a dissected diagram of the pipe cover structure of the present invention; Figure 6 This is a partial structural anatomical diagram of the pipe cover of the present invention; Figure 7 This is a dissected diagram of the pipe cover and the gasket position structure of the present invention; Figure 8 This is a dissected diagram of the gasket structure of the present invention.
[0015] In the figure: 1. tube body; 2. tube cover; 3. gasket; 4. dust cover; 11. hollow tube; 12. side clamp; 13. limit ring; 14. convex ring; 15. support plate; 21. threaded ring; 22. hole cover; 23. barrier ring; 24. rubber sleeve; 25. air hole; 26. rubber ring; 27. ring groove; 31. clamping ring; 32. outer ring plate; 33. inner gasket; 34. guide block; 35. support ring. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.
[0017] The first embodiment, as Figure 1 to Figure 2 and Figures 4 to 6 As shown, the present invention provides a technical solution: a venous blood collection tube that prevents blood from splashing and is easy to fix, comprising: A tube body 1, wherein the tube body 1 has a space for storing blood, and a tube cover 2 is installed on the top of the tube body 1; A gasket 3 is installed inside the tube cover 2, and the tube cover 2 and the gasket 3 cooperate to seal the tube body 1, and a dust cover 4 is installed on the top of the tube cover 2; The tube cover 2 comprises a threaded ring 21, a hole cover 22 is fixedly installed on the top of the threaded ring 21, and air holes 25 are evenly opened at the bottom of the outer side of the hole cover 22. The inner wall of the threaded ring 21 is provided with threads, and the inner wall of the threaded ring 21 is threadedly connected with the top of the outer side of the tube body 1. The top of the outer side of the hole cover 22 is evenly provided with convex strips along the center position, and the bottom of the inner wall of the hole cover 22 is provided with an inner groove, which is threadedly connected with the tube body 1 through the threaded ring 21. After being fully connected, the threaded ring 21 cooperates with the rubber ring 26 to seal the bottom edge of the threaded connection. At the same time, when the blood collection tube is not in use, when a breathable gap appears between the tube body 1 and the tube cover 2 When there is a gap, the inner side of the rubber sleeve 24 is under negative pressure of the tube body 1 through the air hole 25, and the air pressure on the outside is transmitted to the outside of the rubber sleeve 24 through the air hole 25, so that a pressure difference occurs between the inside and outside of the rubber sleeve 24, so that the higher air pressure on the outside presses the rubber sleeve 24, so that the inner wall of the rubber sleeve 24 is in close contact with the outside of the tube body 1, and the gas on the inside and outside of the tube body 1 is blocked by the rubber sleeve 24 to prevent the gas from entering the inside of the tube body 1, and the rubber sleeve 24 is fixedly installed at the inner groove of the hole cover 22, the inner wall of the rubber sleeve 24 is in close contact with the outside of the tube body 1, and the air hole 25 is located on the outside of the rubber sleeve 24.
[0018] A ring groove is provided at the bottom of the threaded ring 21, and a rubber ring 26 is fixedly installed at the ring groove of the threaded ring 21. The rubber ring 26 and the bottom of the threaded ring 21 are tightly fitted with the tube body 1. A ring clamping groove 27 is provided at the top of the inner wall of the escutcheon 22. The escutcheon 22 is fixedly connected to the gasket 3 through the ring clamping groove 27, and a barrier ring 23 is fixedly installed on the top of the escutcheon 22. When the sealing tube body 1 is installed, the ring clamping groove 27 is fixedly connected to the gasket 3, and is tightly fitted with the top of the tube body 1 through the gasket 3. The top of the barrier ring 23 is arc-shaped, and the outer side of the barrier ring 23 is clamped with the inner wall of the dust cover 4.
[0019] The second embodiment is based on the first embodiment. Figure 3 As shown, the tube body 1 includes a hollow tube 11, the interior of the hollow tube 11 has a storage space, and a side clamp 12 is fixedly installed at the bottom of the outer side of the hollow tube 11, and the side clamp 12 is evenly installed along the center position of the hollow tube 11. A thread is opened on the outer side of the hollow tube 11, and the hollow tube 11 is threadedly connected to the inner wall of the threaded ring 21 through the thread, through the support plate 15, after negative pressure sealing, when the support plate 15 is connected, the top of the support plate 15 is tightly fitted with the bottom of the gasket 3, and a seal is formed by the fitting pressure. At the same time, after blood collection, the side clamp 12 is clamped with the blood collection tube storage rack to fix the blood collection tube in the storage rack, and a limiting ring 13 is fixedly installed on the outer side of the hollow tube 11, and anti-skid grooves are symmetrically opened on the outer side of the hollow tube 11, and the anti-skid grooves are located below the limiting ring 13.
[0020] A convex ring 14 is fixedly installed on the top of the limiting ring 13, and the top of the convex ring 14 fits tightly with the bottom of the rubber ring 26. The top of the limiting ring 13 fits tightly with the bottom of the threaded ring 21. A support plate 15 is fixedly installed on the top of the inner wall of the hollow tube 11. When sealed and fixed, the limiting ring 13 fits tightly with the bottom of the threaded ring 21 after being connected with the threaded ring 21 through the threads on the outside of the hollow tube 11. At the same time, the convex ring 14 squeezes the rubber ring 26 at the bottom of the threaded ring 21 into the annular groove of the threaded ring 21. While forming a seal through the fitting pressure, the convex ring 14 and the rubber ring 26 are tortuous at the gap position to improve the sealing effect. A through hole is opened at the center of the top of the support plate 15, and the top of the support plate 15 fits tightly with the bottom of the gasket 3.
[0021] The third embodiment is based on the first and second embodiments. Figures 7 and 8 As shown, the gasket 3 includes an outer ring disk 32, the outer side of which is fixedly installed with a clamping ring 31, the outer ring disk 32 is fixedly connected to the ring clamping groove 27 of the hole cover 22 through the clamping ring 31, the outer ring disk 32 is fixedly connected to the ring clamping groove 27 of the hole cover 22 through the clamping ring 31, so that a seal is formed between the gasket 3 and the pipe cover 2, the bottom of the outer ring disk 32 is tightly fitted with the top of the support disk 15, and an inner gasket ring 33 is fixedly installed on the inner wall of the outer ring disk 32, the bottom of the outer side of the inner gasket ring 33 is tightly fitted with the inner wall of the support disk 15, the top of the inner gasket ring 33 is a conical surface with a downward depression at the center position, and a guide block 34 is fixedly installed on the conical surface of the inner gasket ring 33. In the inner gasket ring 33, the conical surface at the top of the inner gasket ring 33 cooperates with the guide block 34. When the blood collection needle is inserted, the blood collection needle is guided and positioned so that the blood collection needle is inserted along the center position. Cooperating with the groove at the bottom of the blood collection needle, less material is passed through when the center position is inserted, thereby reducing the difficulty of insertion. The guide block 34 is evenly installed along the center position of the inner gasket ring 33. A groove is provided at the bottom of the inner gasket ring 33, and the inner diameter gradually increases from top to bottom. A concave ring groove is clamped at the top of the inner gasket ring 33, and a support ring 35 is fixedly installed at the concave ring groove of the inner gasket ring 33. The support ring 35 supports the inner gasket ring 33 so that the outer side of the inner gasket ring 33 fits tightly with the inner wall of the support disk 15.
[0022] Before use, the tube body 1 is under negative pressure, and the storage space inside the tube body 1 is sealed by the cooperation of the tube cover 2 and the gasket 3, so that the inside of the tube body 1 maintains negative pressure, and the tube cover 2 and the top of the gasket 3 are sealed and dust-proof by the dust cover 4. When in use, the medical staff removes the dust cover 4 from the top of the tube cover 2. After the medical staff inserts the blood collection needle into the patient's vein, the lead-out end of the blood collection needle is inserted from the center position of the gasket 3 to penetrate the gasket 3, so that the lead-out end of the blood collection needle enters the interior of the tube body 1, and the blood is introduced into the interior of the tube body 1 for collection under the combined action of blood pressure and the negative pressure inside the tube body 1.
[0023] When the tube cover 2 is connected to the tube body 1, it is threadedly connected to the tube body 1 through the threaded ring 21. After the connection is complete, the threaded ring 21 cooperates with the rubber ring 26 to seal the bottom edge of the threaded connection. At the same time, when the blood collection tube is not in use, when a breathable gap appears between the tube body 1 and the tube cover 2, the inner side of the rubber sleeve 24 is negative pressure of the tube body 1 through the air hole 25, and the air pressure on the outside is transmitted to the outside of the rubber sleeve 24 through the air hole 25, so that a pressure difference occurs between the inside and outside of the rubber sleeve 24, so that the higher air pressure on the outside presses the rubber sleeve 24, so that the inner wall of the rubber sleeve 24 is closely attached to the outside of the tube body 1, and the gas on the inside and outside of the tube body 1 is blocked by the rubber sleeve 24 to prevent the gas from entering the inside of the tube body 1. At the same time, when the sealed tube body 1 is installed, the ring clamping groove 27 is fixedly connected to the gasket 3, and is tightly fitted with the top of the tube body 1 through the gasket 3.
[0024] In the tube body 1, through the support plate 15, after the negative pressure sealing, when the support plate 15 is connected, the top of the support plate 15 is tightly fitted with the bottom of the gasket 3, and a seal is formed by the fitting pressure. At the same time, after blood sampling, the side clamping plate 12 is clamped with the blood sampling tube storage rack to fix the blood sampling tube in the storage rack. At the same time, when the seal is fixed, the thread on the outside of the hollow tube 11 is connected with the threaded ring 21, so that the limit ring 13 is tightly fitted with the bottom of the threaded ring 21, and the convex ring 14 squeezes the rubber ring 26 at the bottom of the threaded ring 21 into the ring groove of the threaded ring 21. While the seal is formed by the fitting pressure, the convex ring 14 and the rubber ring 26 are tortuous at the gap position to improve the sealing effect.
[0025] In the gasket 3, the outer ring disk 32 is fixedly connected to the ring groove 27 of the hole cover 22 through the clamping ring 31, so that a seal is formed between the gasket 3 and the tube cover 2. At the same time, in the inner gasket ring 33, the conical surface on the top of the inner gasket ring 33 cooperates with the guide block 34. When the blood collection needle is inserted, the blood collection needle is guided and positioned so that the blood collection needle is inserted along the center position. With the groove at the bottom of the blood collection needle, less material is passed through when the center position is inserted, thereby reducing the difficulty of insertion. At the same time, the support ring 35 supports the inner gasket ring 33 so that the outer side of the inner gasket ring 33 fits tightly with the inner wall of the support disk 15.
[0026] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.
Claims
1. A venous blood collection tube that prevents blood from splashing and is easy to fix, characterized in that: include: A tube body (1), the tube body (1) having a space for storing blood, and a tube cover (2) is installed on the top of the tube body (1); A gasket (3) is installed inside the tube cover (2), and the tube cover (2) and the gasket (3) cooperate to seal the tube body (1), and a dust cover (4) is installed on the top of the tube cover (2); The pipe cover (2) comprises a threaded ring (21), a escutcheon (22) is fixedly mounted on the top of the threaded ring (21), air holes (25) are evenly arranged at the bottom of the outer side of the escutcheon (22), the inner wall of the threaded ring (21) is provided with threads, and the inner wall of the threaded ring (21) is threadedly connected to the top of the outer side of the pipe body (1), convex strips are evenly arranged at the top of the outer side of the escutcheon (22) along the center of a circle, and an inner groove is formed at the bottom of the inner wall of the escutcheon (22), and a rubber sleeve (24) is fixedly mounted at the inner groove of the escutcheon (22), the inner wall of the rubber sleeve (24) is tightly fitted to the outer side of the pipe body (1), and the air holes (25) are located on the outer side of the rubber sleeve (24).
2. A venous blood collection tube that prevents blood from splashing and is easy to fix according to claim 1, characterized in that: The bottom of the threaded ring (21) is provided with an annular groove, and a rubber ring (26) is fixedly mounted on the annular groove of the threaded ring (21), and the rubber ring (26) and the bottom of the threaded ring (21) are tightly fitted with the tube body (1).
3. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 1, characterized in that: A ring groove (27) is provided at the top of the inner wall of the escutcheon (22), and the escutcheon (22) is fixedly connected to the gasket (3) via the ring groove (27). A barrier ring (23) is fixedly mounted on the top of the escutcheon (22), and the top of the barrier ring (23) is arc-shaped, and the outer side of the barrier ring (23) is clamped with the inner wall of the dust cover (4).
4. A venous blood collection tube that prevents blood from splashing and is easy to fix according to claim 3, characterized in that: The tube body (1) comprises a hollow tube (11), the interior of the hollow tube (11) has a storage space, and a side clamping plate (12) is fixedly mounted on the bottom of the outer side of the hollow tube (11), and the side clamping plate (12) is evenly mounted along the center position of the hollow tube (11).
5. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 4, characterized in that: The outer side of the hollow tube (11) is provided with a thread, and the hollow tube (11) is threadably connected to the inner wall of the threaded ring (21) via the thread, a limit ring (13) is fixedly mounted on the outer side of the hollow tube (11), and anti-slip grooves are symmetrically provided on the outer side of the hollow tube (11), and the anti-slip grooves are located below the limit ring (13).
6. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 5, characterized in that: A convex ring (14) is fixedly mounted on the top of the limiting ring (13); the top of the convex ring (14) is tightly fitted with the bottom of the rubber ring (26); and the top of the limiting ring (13) is tightly fitted with the bottom of the threaded ring (21).
7. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 5, characterized in that: A support plate (15) is fixedly mounted on the top of the inner wall of the hollow tube (11), a through hole is provided at the center of the top of the support plate (15), and the top of the support plate (15) is tightly fitted with the bottom of the gasket (3).
8. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 1, characterized in that: The gasket (3) comprises an outer ring disk (32), a clamping ring (31) is fixedly mounted on the outer side of the outer ring disk (32), and the outer ring disk (32) is fixedly connected to the ring clamping groove (27) of the escutcheon (22) via the clamping ring (31).
9. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 8, characterized in that: The bottom of the outer ring disk (32) fits tightly with the top of the support disk (15), and an inner gasket ring (33) is fixedly mounted on the inner wall of the outer ring disk (32), the bottom of the outer side of the inner gasket ring (33) fits tightly with the inner wall of the support disk (15), and the top of the inner gasket ring (33) is a conical surface with a downward depression at the center.
10. The venous blood collection tube that can prevent blood from splashing and is easy to fix according to claim 9, characterized in that: A guide block (34) is fixedly mounted on the conical surface of the inner gasket ring (33). The guide block (34) is evenly mounted along the center of the inner gasket ring (33). A groove is provided at the bottom of the inner gasket ring (33), and the inner diameter gradually increases from top to bottom. A concave ring groove is clamped at the top of the inner gasket ring (33), and a support ring (35) is fixedly mounted at the concave ring groove of the inner gasket ring (33).