A new disposable arterial lancet

Abstract

The utility model provides a novel disposable arterial blood taking needle, including blood taking container subassembly and connecting end cap, the connecting end cap installs in one side of blood taking container subassembly, be equipped with connecting mechanism between blood taking container subassembly and connecting end cap, the inside wall middle part of connecting end cap is fixedly connected with blood taking needle mechanism, the utility model discloses a blood taking needle mechanism is fixed in the inside of connecting end cap, in order to utilize the connecting end cap to shield the protection to the one end of blood taking needle mechanism and blood taking container subassembly connection, to reduce the risk of being pricked in the operation process, then utilize the connecting mechanism to carry out quick assembly between blood taking container subassembly and connecting end cap, and can make the one end of blood taking needle mechanism to be penetrated rubber plug and extend to the inside of blood taking container subassembly in the process of assembling, reduced the operation step of using, reduced the needle head pollution risk, and can quickly remove blood taking needle mechanism after blood taking, further reduce the risk of being pricked.

Description

Technical Field

[0001] This utility model relates to a blood collection needle, specifically a novel disposable arterial blood collection needle, belonging to the field of blood collection needle technology. Background Technology

[0002] An arterial blood sampling needle is a medical device used to collect arterial blood samples, primarily for in vitro diagnostic testing. It mainly consists of a needle tip and a needle shaft, with the needle tip located at the head of the shaft. During medical procedures, the needle tip of the arterial blood sampling needle is designed to be extremely sharp, easily piercing the arterial wall. Arterial blood sampling needles are typically for single use to ensure sterility and safety during medical procedures.

[0003] Patent CN207575158U discloses a disposable arterial blood collection needle that prevents needlestick injuries and features automatic sealing. During use, after the nurse collects a sample, the needle tip is immediately covered, preventing needlestick injuries to medical staff. Secondly, the needle has a one-piece structure; after the nurse unscrews the needle, the sealing device at the front of the needle automatically seals, immediately isolating the air. It is characterized by its ease of operation, high efficiency, and protection of medical staff safety. However, its overall structure is too complex, increasing the cost of using disposable arterial blood collection needles, and the disassembly and assembly of the needle tip is inconvenient, potentially affecting subsequent blood testing operations. Therefore, a novel disposable arterial blood collection needle is proposed. Utility Model Content

[0004] In view of this, the present invention provides a novel disposable arterial blood collection needle to solve or alleviate the technical problems existing in the prior art, or at least to provide a beneficial alternative.

[0005] The technical solution of this utility model embodiment is implemented as follows: a novel disposable arterial blood collection needle includes a blood collection container assembly and a connecting end cap. The connecting end cap is installed on one side of the blood collection container assembly. A connecting mechanism is provided between the blood collection container assembly and the connecting end cap. A blood collection needle mechanism is fixedly connected to the middle of the inner sidewall of the connecting end cap. A rubber stopper is fixedly connected to one end of the blood collection container assembly.

[0006] The connecting end cap is used to shield and protect one end of the blood collection needle mechanism.

[0007] The connecting mechanism is used to quickly connect the blood collection container assembly and the connecting end cap, and can drive the blood collection needle mechanism through the rubber stopper to extend into the interior of the blood collection container assembly during the connection process.

[0008] More preferably, the blood collection container assembly is a piston-type blood collection mechanism, consisting of a piston needle tube, a push-pull rod, and a piston block;

[0009] The outer wall of the piston block is slidably connected to the inner wall of the piston needle tube, one end of the push-pull rod is fixedly connected to one end of the piston block, the rubber plug is threadedly connected to the end of the piston needle tube away from the push-pull rod, and the outer wall of the connecting end cap is provided with an anti-slip part.

[0010] More preferably, the blood collection needle mechanism consists of a single first blood collection needle;

[0011] The outer side wall of the first blood collection needle is fixedly connected to the middle of the inner side wall of the connecting end cap, and one end of the first blood collection needle passes through the rubber stopper and extends into the interior of the piston needle tube.

[0012] More preferably, the connecting mechanism consists of a snap-fit ​​groove, a snap-fit ​​slider, a rubber retaining ring, and a retaining groove;

[0013] The snap-fit ​​groove is formed on one side of the outer wall of the piston needle tube, the snap-fit ​​slider is fixedly connected to one end of the connecting end cap near the piston needle tube, the outer wall of the snap-fit ​​slider is slidably connected to the inner wall of the snap-fit ​​groove, the rubber retaining ring is fixedly connected to the outer wall of the piston needle tube, the retaining groove is formed on the inner wall of the connecting end cap, and the rubber retaining ring is adapted to the retaining groove.

[0014] More preferably, the connecting mechanism consists of an external thread portion and an internal thread portion;

[0015] The external thread is formed on the outer side wall of the piston needle tube, and the internal thread is formed on the inner side wall of the connecting end cap. The external thread and the internal thread are adapted to each other.

[0016] More preferably, the blood collection container assembly is a vacuum blood collection mechanism, consisting of a vacuum blood collection tube and an identification cap;

[0017] The identification cap is installed at one end of the vacuum blood collection tube, the rubber plug is threaded to the other end of the vacuum blood collection tube, the outer wall of the connecting end cap is provided with an anti-slip part, one end of the connecting end cap is provided with a groove, and a disposable switch mechanism is installed on the inner wall of the groove.

[0018] More preferably, the blood collection needle mechanism consists of a blood transfusion tubing, a blood collection needle tip, and a terminal blood transfusion steel needle;

[0019] The distal transfusion needle is fixedly connected to the middle of the inner wall of the connecting cap. One end of the distal transfusion needle penetrates the inner wall of the rubber stopper and extends into the interior of the vacuum blood collection tube. One end of the transfusion tubing is connected to one end of the distal transfusion needle, and one end of the blood collection needle is connected to the end of the transfusion tubing away from the distal transfusion needle.

[0020] More preferably, the one-time switching mechanism includes a switch push plate, an arc-shaped pressure block, several fracture teeth, and a through groove;

[0021] The outer wall of the switch push plate is slidably connected to the inner wall of the groove. The blood transfusion tube is located on one side of the inner wall of the arc-shaped pressure block. The arc-shaped pressure block is fixedly connected to the inner wall of the groove and is used to cooperate with the switch push plate to squeeze and close the blood transfusion tube. Several of the fracture teeth are fixedly connected between the inner wall of the groove and the switch push plate. The through groove is opened in the middle of the switch push plate. The outer wall of the arc-shaped pressure block is slidably connected to the inner wall of the through groove.

[0022] The present invention has the following advantages due to the adoption of the above technical solution:

[0023] I. This utility model fixes the blood collection needle mechanism inside the connecting end cap, so that the connecting end cap can shield and protect the end of the blood collection needle mechanism connected to the blood collection container assembly, thereby reducing the risk of puncture during operation. Then, the connecting mechanism is used to quickly assemble the blood collection container assembly and the connecting end cap. During the assembly process, one end of the blood collection needle mechanism can pass through the rubber stopper and extend into the interior of the blood collection container assembly, reducing the number of operation steps during use, reducing the risk of needle contamination, and the blood collection needle mechanism can be quickly removed after blood collection, further reducing the risk of puncture.

[0024] Second, the overall structure of this utility model is simple and the cost of use is low. The blood collection needle mechanism can be quickly disassembled and assembled by using the connecting end cap and the connecting mechanism, which simplifies the operation steps when disassembling the blood collection needle mechanism and ensures the normal operation of subsequent blood testing. After the blood collection needle mechanism is disassembled, one end of the blood collection container assembly can be sealed with a rubber stopper.

[0025] The above overview is for illustrative purposes only and is not intended to limit the scope of the invention in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural diagram of Embodiment 1 of the present utility model;

[0028] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present utility model;

[0029] Figure 3 This utility model Figure 2 Enlarged schematic diagram of area A structure;

[0030] Figure 4 This is an axonometric view of the piston needle tube of this utility model;

[0031] Figure 5 This is an isometric view of the snap-fit ​​slider of this utility model;

[0032] Figure 6 This is a structural diagram of Embodiment 2 of the present invention;

[0033] Figure 7 This is a schematic diagram of the external threaded portion of this utility model;

[0034] Figure 8 This is a schematic diagram of the internal thread portion of this utility model;

[0035] Figure 9 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0036] Figure 10 This is a cross-sectional structural diagram of Embodiment 3 of the present invention;

[0037] Figure 11 This is a cross-sectional view of the switch push plate of this utility model.

[0038] Reference numerals: 1. Blood collection container assembly; 2. Connecting end cap; 3. Blood collection needle mechanism; 4. Connecting mechanism; 5. Rubber stopper; 7. Disposable switch mechanism; 11. Piston-type blood collection mechanism; 12. Vacuum-type blood collection mechanism; 111. Piston needle tube; 112. Push-pull rod; 113. Piston block; 121. Vacuum blood collection tube; 122. Identification cap; 301. First blood collection needle; 311. Transfusion tubing; 312. Blood collection needle tip; 313. Terminal transfusion needle; 401. Snap-fit ​​groove; 402. Snap-fit ​​slider; 403. Rubber retaining ring; 404. Snap-fit ​​groove; 411. External thread part; 412. Internal thread part; 61. Anti-slip part; 62. Groove; 701. Switch push plate; 702. Arc-shaped pressure block; 703. Fracture tooth; 704. Through groove. Detailed Implementation

[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0040] It is important to note that terms such as "first," "second," "symmetric," and "array" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features.

[0041] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0042] Example 1

[0043] like Figures 1-5 As shown, this utility model embodiment provides a novel disposable arterial blood collection needle, including a blood collection container assembly 1 and a connecting end cap 2. The connecting end cap 2 is installed on one side of the blood collection container assembly 1. A connecting mechanism 4 is provided between the blood collection container assembly 1 and the connecting end cap 2. A blood collection needle mechanism 3 is fixedly connected to the middle of the inner side wall of the connecting end cap 2. A rubber stopper 5 is fixedly connected to one end of the blood collection container assembly 1.

[0044] Among them, the connecting end cap 2 is used to shield and protect one end of the blood collection needle mechanism 3;

[0045] The connecting mechanism 4 is used to quickly connect the blood collection container assembly 1 and the connecting end cap 2, and can drive the blood collection needle mechanism 3 through the rubber stopper 5 to extend into the interior of the blood collection container assembly 1 during the connection process.

[0046] In one embodiment, the blood collection container assembly 1 is a piston-type blood collection mechanism 11, which consists of a piston needle tube 111, a push-pull rod 112, and a piston block 113.

[0047] The outer wall of the piston block 113 is slidably connected to the inner wall of the piston needle tube 111, one end of the push-pull rod 112 is fixedly connected to one end of the piston block 113, the rubber plug 5 is threadedly connected to the end of the piston needle tube 111 away from the push-pull rod 112, and the outer wall of the connecting end cap 2 is provided with an anti-slip part 61.

[0048] The piston block 113 is moved by the push-pull rod 112. The moving piston block 113 slides inside the piston needle tube 111, creating a negative pressure inside, so as to cooperate with the blood collection needle mechanism 3 to carry out blood collection.

[0049] In one embodiment, the blood collection needle mechanism 3 consists of a single first blood collection needle 301;

[0050] The outer side wall of the first blood collection needle 301 is fixedly connected to the middle of the inner side wall of the connecting end cap 2, and one end of the first blood collection needle 301 passes through the rubber stopper 5 and extends into the interior of the piston needle tube 111.

[0051] In one embodiment, the connecting mechanism 4 consists of a snap-fit ​​groove 401, a snap-fit ​​slider 402, a rubber retaining ring 403, and a retaining groove 404;

[0052] The snap-fit ​​groove 401 is formed on one side of the outer wall of the piston needle tube 111, the snap-fit ​​slider 402 is fixedly connected to the end of the connecting end cap 2 near the piston needle tube 111, the outer wall of the snap-fit ​​slider 402 is slidably connected to the inner wall of the snap-fit ​​groove 401, the rubber retaining ring 403 is fixedly connected to the outer wall of the piston needle tube 111, the retaining groove 404 is formed on the inner wall of the connecting end cap 2, and the rubber retaining ring 403 is adapted to the retaining groove 404.

[0053] The movable connecting cap 2 drives the slot 404 and the snap-fit ​​slider 402 to move, and compresses the rubber retaining ring 403 so that the snap-fit ​​slider 402 is inserted into the snap-fit ​​groove 401 on the piston needle tube 111. The inner wall of the snap-fit ​​groove 401 guides the snap-fit ​​slider 402, causing the connecting cap 2 to rotate slightly. When the snap-fit ​​slider 402 is fully inserted into the snap-fit ​​groove 401, the slot 404 moves to the compressed rubber retaining ring 403, so that the slot 404 and the rubber retaining ring 403 can be used to limit the connecting cap 2 on the piston needle tube 111. When it is necessary to remove the connecting cap 2, simply rotate the connecting cap 2 slightly to make the snap-fit ​​slider 402 slide out of the snap-fit ​​groove 401 and the rubber retaining ring 403 slide out of the slot 404 to complete the disassembly operation.

[0054] Example 2

[0055] like Figures 1-8 As shown, this utility model embodiment provides a novel disposable arterial blood collection needle, including a blood collection container assembly 1 and a connecting end cap 2. The connecting end cap 2 is installed on one side of the blood collection container assembly 1. A connecting mechanism 4 is provided between the blood collection container assembly 1 and the connecting end cap 2. A blood collection needle mechanism 3 is fixedly connected to the middle of the inner side wall of the connecting end cap 2. A rubber stopper 5 is fixedly connected to one end of the blood collection container assembly 1.

[0056] Among them, the connecting end cap 2 is used to shield and protect one end of the blood collection needle mechanism 3;

[0057] The connecting mechanism 4 is used to quickly connect the blood collection container assembly 1 and the connecting end cap 2, and can drive the blood collection needle mechanism 3 through the rubber stopper 5 to extend into the interior of the blood collection container assembly 1 during the connection process.

[0058] In one embodiment, the connecting mechanism 4 consists of an external threaded portion 411 and an internal threaded portion 412;

[0059] The external thread 411 is formed on the outer side wall of the piston needle tube 111, and the internal thread 412 is formed on the inner side wall of the connecting end cap 2. The external thread 411 and the internal thread 412 are adapted to each other.

[0060] By moving the connecting end cap 2, the internal threaded part 412 is driven to be sleeved on the external threaded part 411 outside the piston needle tube 111. Then, by rotating the connecting end cap 2, the connection with the piston needle tube 111 can be achieved by using the thread. Compared with the first embodiment, this embodiment requires continuous rotation of the connecting end cap 2 during use, which is relatively inconvenient.

[0061] Example 3

[0062] like Figures 1-11 As shown, this utility model embodiment provides a novel disposable arterial blood collection needle, including a blood collection container assembly 1 and a connecting end cap 2. The connecting end cap 2 is installed on one side of the blood collection container assembly 1. A connecting mechanism 4 is provided between the blood collection container assembly 1 and the connecting end cap 2. A blood collection needle mechanism 3 is fixedly connected to the middle of the inner side wall of the connecting end cap 2. A rubber stopper 5 is fixedly connected to one end of the blood collection container assembly 1.

[0063] Among them, the connecting end cap 2 is used to shield and protect one end of the blood collection needle mechanism 3;

[0064] The connecting mechanism 4 is used to quickly connect the blood collection container assembly 1 and the connecting end cap 2, and can drive the blood collection needle mechanism 3 through the rubber stopper 5 to extend into the interior of the blood collection container assembly 1 during the connection process.

[0065] In one embodiment, the blood collection container assembly 1 is a vacuum blood collection mechanism 12, which consists of a vacuum blood collection tube 121 and an identification cap 122;

[0066] The identification cap 122 is installed at one end of the vacuum blood collection tube 121, the rubber plug 5 is threaded to the other end of the vacuum blood collection tube 121, the outer side wall of the connecting end cap 2 is provided with an anti-slip part 61, one end of the connecting end cap 2 is provided with a groove 62, and a disposable switch mechanism 7 is installed on the inner side wall of the groove 62.

[0067] The blood collection needle mechanism 3 consists of a blood transfusion tubing 311, a blood collection needle head 312, and a terminal blood transfusion steel needle 313;

[0068] The distal transfusion needle 313 is fixedly connected to the middle of the inner wall of the connecting end cap 2. One end of the distal transfusion needle 313 penetrates the inner wall of the rubber stopper 5 and extends into the interior of the vacuum blood collection tube 121. One end of the transfusion tubing 311 is connected to one end of the distal transfusion needle 313, and one end of the blood collection needle 312 is connected to the end of the transfusion tubing 311 away from the distal transfusion needle 313.

[0069] The blood collection needle mechanism 3 is designed in three sections to cooperate with the vacuum blood collection tube 121 for blood collection operations.

[0070] The one-time switching mechanism 7 includes a switch push plate 701, an arc-shaped pressure block 702, several fracture teeth 703 and a through groove 704;

[0071] The outer wall of the switch push plate 701 is slidably connected to the inner wall of the groove 62. The blood transfusion tube 311 is located on one side of the inner wall of the arc-shaped pressure block 702. The arc-shaped pressure block 702 is fixedly connected to the inner wall of the groove 62 and is used to cooperate with the switch push plate 701 to squeeze and close the blood transfusion tube 311. Several broken teeth 703 are fixedly connected between the inner wall of the groove 62 and the switch push plate 701. The through groove 704 is opened in the middle of the switch push plate 701. The outer wall of the arc-shaped pressure block 702 is slidably connected to the inner wall of the through groove 704.

[0072] When using the vacuum blood collection tube 121 for blood collection, in order to reduce the amount of air entering the vacuum blood collection tube 121, the blood transfusion tube 311 is squeezed and closed by the switch push plate 701 in conjunction with the arc-shaped pressure block 702. When it is necessary to open the blood transfusion tube 311 for blood collection, it is only necessary to move the switch push plate 701 to separate from the broken tooth 703, so that the arc-shaped pressure block 702 can slide in the through groove 704 to release the compression on the blood transfusion tube 311 and allow blood to flow normally.

[0073] In operation, this invention moves the blood collection needle mechanism 3 by moving the connecting end cap 2, and then quickly assembles the blood collection container assembly 1 and the connecting end cap 2 in conjunction with the connecting mechanism 4. During the assembly process, one end of the blood collection needle mechanism 3 passes through the rubber stopper 5 and extends into the interior of the blood collection container assembly 1, thus completing the assembly operation of the blood collection needle mechanism 3. Blood collection can then be performed using the blood collection container assembly 1 and the blood collection needle mechanism 3. After the blood collection operation is completed, the connecting end cap 2 can be rotated to quickly remove it from the blood collection container assembly 1 using the connecting mechanism 4, and the blood collection needle mechanism 3 can be pulled out from the rubber stopper 5 so that the blood collection needle mechanism 3 can be removed immediately after the blood collection is completed.

[0074] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A novel disposable arterial blood collection needle, comprising a blood collection container assembly (1) and a connecting cap (2), characterized in that, The connecting end cap (2) is installed on one side of the blood collection container assembly (1). A connecting mechanism (4) is provided between the blood collection container assembly (1) and the connecting end cap (2). A blood collection needle mechanism (3) is fixedly connected to the middle of the inner side wall of the connecting end cap (2). A rubber stopper (5) is fixedly connected to one end of the blood collection container assembly (1). The connecting end cap (2) is used to shield and protect one end of the blood collection needle mechanism (3); The connecting mechanism (4) is used to quickly connect the blood collection container assembly (1) and the connecting end cap (2), and can drive the blood collection needle mechanism (3) through the rubber stopper (5) to extend into the interior of the blood collection container assembly (1) during the connection process.

2. The novel disposable arterial blood collection needle according to claim 1, characterized in that: The blood collection container assembly (1) is a piston-type blood collection mechanism (11), which consists of a piston needle tube (111), a push-pull rod (112), and a piston block (113); The outer side wall of the piston block (113) is slidably connected to the inner side wall of the piston needle tube (111), one end of the push-pull rod (112) is fixedly connected to one end of the piston block (113), the rubber plug (5) is threadedly connected to the end of the piston needle tube (111) away from the push-pull rod (112), and the outer side wall of the connecting end cap (2) is provided with an anti-slip part (61).

3. The novel disposable arterial blood collection needle according to claim 1, characterized in that: The blood collection needle mechanism (3) consists of a single first blood collection needle (301); The outer side wall of the first blood collection needle (301) is fixedly connected to the middle of the inner side wall of the connecting end cap (2), and one end of the first blood collection needle (301) passes through the rubber stopper (5) and extends into the interior of the piston needle tube (111).

4. The novel disposable arterial blood collection needle according to claim 2, characterized in that: The connecting mechanism (4) consists of a snap-fit ​​groove (401), a snap-fit ​​slider (402), a rubber retaining ring (403), and a retaining groove (404); The snap-fit ​​groove (401) is formed on one side of the outer wall of the piston needle tube (111), the snap-fit ​​slider (402) is fixedly connected to one end of the connecting end cap (2) near the piston needle tube (111), the outer wall of the snap-fit ​​slider (402) is slidably connected to the inner wall of the snap-fit ​​groove (401), the rubber retainer (403) is fixedly connected to the outer wall of the piston needle tube (111), the retainer groove (404) is formed on the inner wall of the connecting end cap (2), and the rubber retainer (403) is adapted to the retainer groove (404).

5. The novel disposable arterial blood collection needle according to claim 2, characterized in that: The connecting mechanism (4) consists of an external threaded part (411) and an internal threaded part (412); The external thread (411) is located on the outer side wall of the piston needle tube (111), and the internal thread (412) is located on the inner side wall of the connecting end cap (2). The external thread (411) and the internal thread (412) are adapted to each other.

6. The novel disposable arterial blood collection needle according to claim 1, characterized in that: The blood collection container assembly (1) is a vacuum blood collection mechanism (12), which consists of a vacuum blood collection tube (121) and an identification cap (122); The identification cap (122) is installed at one end of the vacuum blood collection tube (121), the rubber plug (5) is threaded to the other end of the vacuum blood collection tube (121), the outer side wall of the connecting end cap (2) is provided with an anti-slip part (61), one end of the connecting end cap (2) is provided with a groove (62), and the inner side wall of the groove (62) is provided with a disposable switch mechanism (7).

7. The novel disposable arterial blood collection needle according to claim 6, characterized in that: The blood collection needle mechanism (3) consists of a blood transfusion tubing (311), a blood collection needle (312), and a terminal blood transfusion steel needle (313); The distal transfusion needle (313) is fixedly connected to the middle of the inner wall of the connecting end cap (2). One end of the distal transfusion needle (313) penetrates the inner wall of the rubber stopper (5) and extends into the vacuum blood collection tube (121). One end of the transfusion tubing (311) is connected to one end of the distal transfusion needle (313). One end of the blood collection needle (312) is connected to the end of the transfusion tubing (311) away from the distal transfusion needle (313).

8. The novel disposable arterial blood collection needle according to claim 7, characterized in that: The one-time switching mechanism (7) includes a switch push plate (701), an arc-shaped pressure block (702), several fracture teeth (703) and a through groove (704); The outer wall of the switch push plate (701) is slidably connected to the inner wall of the groove (62). The blood transfusion tube (311) is located on one side of the inner wall of the arc-shaped pressure block (702). The arc-shaped pressure block (702) is fixedly connected to the inner wall of the groove (62) and is used to cooperate with the switch push plate (701) to squeeze and close the blood transfusion tube (311). Several of the fracture teeth (703) are fixedly connected between the inner wall of the groove (62) and the switch push plate (701). The through groove (704) is opened in the middle of the switch push plate (701). The outer wall of the arc-shaped pressure block (702) is slidably connected to the inner wall of the through groove (704).

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