Limiting structure for preventing blood collection tube from popping up and blood collection device

Abstract

The utility model provides a limiting structure for preventing a blood collection tube from popping up and a blood collection device. The limiting structure comprises a first limiting piece and a second limiting piece, the first limiting piece is provided with a first cylindrical body, one end of the first cylindrical body is provided with a blocking face and a limiting groove, and the limiting groove is provided with an inlet and outlet. The second limiting piece is provided with a second cylindrical body, one end of the second cylindrical body is open, the other end of the second cylindrical body is closed, and the open end is provided with a limiting piece. During blood sampling, the blood sampling sleeve is sleeved with the first limiting piece, the blood sampling tube is sleeved with the second limiting piece, the blood sampling tube is fed into the blood sampling sleeve, and the limiting piece enters the limiting groove; when the blood collection tube needs to be fixed, the limiting piece is screwed into the limiting groove from the inlet and outlet, and when limiting of the blood collection tube needs to be relieved, the limiting piece is screwed out of the limiting groove from the inlet and outlet. The limiting structure is used on the blood sampling device, the blood sampling tube and the blood sampling device can be temporarily fixed in the blood sampling process, the blood sampling tube does not need to be continuously pressed by hands in the blood sampling process, the two hands are liberated, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a limiting structure and a blood sampling device for preventing a blood sampling tube from popping out. Background Art

[0002] Blood is very important to the human body. It plays a role in transporting substances and regulating body temperature. It is an indispensable substance for maintaining normal life activities of the human body. Blood can transport oxygen and various nutrients needed by the human body to tissues and organs, and at the same time can transport waste products such as carbon dioxide from tissue and organ metabolism to the lungs and kidneys for excretion. Blood also contains various antibodies that can fight against foreign pathogenic microorganisms and various bacteria. When pathological phenomena occur in the human body, blood sampling is usually required for blood tests to determine the cause of the pathology.

[0003] In clinical practice, blood is mostly collected through blood collection needles and blood collection tubes. Current blood collection devices generally include a blood collection sleeve, one end of which is open and the other end is closed. A blocking flange is provided on the outer wall of the open end, and the middle of the closed end is connected to the blood collection needle through a bleeding hose. A puncture needle for piercing the blood collection tube is also provided inside the blood collection sleeve, and one end of the puncture needle is connected to the bleeding hose. A protective soft sleeve is wrapped outside the inner part of the blood collection sleeve. When collecting blood, the blood collection tube is inserted into the blood collection sleeve from the open end of the blood collection sleeve, and the blood collection tube is squeezed hard so that the puncture needle pierces the protective soft sleeve and then penetrates into the blood collection tube. At this time, under the action of the negative pressure in the blood collection tube, blood is injected from the human body into the blood collection tube. Since the protective hose is made of elastic material, it will generate a reverse thrust when squeezed, so the blood collection tube always has a tendency to be ejected. Once the blood collection tube is not continuously pressed by hand, the blood collection tube is easy to eject, resulting in the inability to complete blood collection at one time. Continuously pressing the blood collection tube not only occupies the hands of medical staff, but also is inconvenient to use.

[0004] Therefore, how to design a limiting structure and a blood collection device that can temporarily fix the blood collection tube and the blood collection device during blood collection, and quickly and conveniently separate the blood collection tube and the blood collection device after blood collection is completed, so as not only to complete blood collection in one go, but also to free both hands and thus be easy to use for preventing the blood collection tube from popping out, is a technical problem that has not yet been solved in the prior art. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that when using a blood sampling device to collect blood, the protective hose is made of elastic material and will generate a reverse thrust when squeezed, so the blood sampling tube always has a tendency to be ejected. Once the blood sampling tube is not continuously pressed by hand, the blood sampling tube is easily ejected, resulting in the inability to complete blood collection in one go. Continuously pressing the blood sampling tube not only occupies the hands of medical staff, but also makes it inconvenient to use. Therefore, a technical defect is provided that can temporarily fix the blood sampling tube and the blood sampling device during blood collection, and can quickly and conveniently separate the blood sampling tube and the blood sampling device after blood collection is completed, so that not only can blood collection be completed in one go, but also both hands can be freed, thereby conveniently using a limiting structure for preventing the blood sampling tube from ejecting.

[0006] The utility model also provides a blood sampling device for preventing the blood sampling tube from popping out.

[0007] To this end, the utility model provides a limiting structure for preventing a blood collection tube from popping out, comprising:

[0008] The first limiting member has a first tubular body, the inner diameter of which is larger than the outer diameter of the blood sampling sleeve; a blocking surface and a limiting groove are provided at one end of the first tubular body, the blocking surface can block the blocking flange of the blood sampling sleeve, and the limiting groove has an inlet and an outlet;

[0009] The second limiting member has a second tubular body; one end of the second tubular body is open and the other end is closed, and the inner diameter of the second tubular body is larger than the outer diameter of the blood collection tube, and a limiting plate is provided on the open end of the second tubular body;

[0010] The limiting piece can be screwed into the limiting groove from the inlet and outlet to limit the blood sampling tube inside the blood sampling sleeve, and can also be screwed out of the limiting groove from the inlet and outlet to release the limiting of the blood sampling tube.

[0011] As a preferred solution, at least one second elongated through hole is formed on the second cylindrical body.

[0012] The utility model also provides a limiting structure for preventing a blood sampling tube from popping out, comprising: a first limiting member having a first tubular body, the inner diameter of the first tubular body being larger than the outer diameter of a blood sampling sleeve; a blocking surface and a limiting groove are provided at one end of the first tubular body, the blocking surface can block the blocking flange of the blood sampling sleeve, and the limiting groove has an inlet and outlet;

[0013] The second limiting member comprises a second tubular body; both ends of the second tubular body are open, and the inner diameter is larger than the outer diameter of the blood collection tube; one end of the second tubular body is divided into at least two main body pieces by at least two second long through holes opened on the outer wall, and a limiting piece is provided on the outer wall of the end of each main body piece, and a limiting surface for limiting the blood collection tube is provided on the inner wall of the end of each main body piece;

[0014] The limiting piece can be screwed into the limiting groove from the inlet and outlet to limit the blood sampling tube inside the blood sampling sleeve, and can also be screwed out of the limiting groove from the inlet and outlet to release the limiting of the blood sampling tube.

[0015] As a preferred solution, the first limiting member includes:

[0016] first cylindrical body;

[0017] The blocking surface is annular, the inner surface of which is connected to the outer side surface of one end of the first cylindrical body and is substantially perpendicular to the outer wall of the first cylindrical body;

[0018] The connecting surface is cylindrical, one end of which is connected to the outer circumference of the blocking surface, and the other end of which extends in a direction away from the first cylindrical body and is substantially perpendicular to the blocking surface;

[0019] There are at least two convex surfaces connected to the outer end surface of the connecting surface and parallel to and opposite to the blocking surface to form at least two limiting grooves.

[0020] As a preferred solution, it also includes a blocking block, which is arranged at one end of the limiting groove; the spacing distance between two adjacent convex surfaces is greater than or equal to the width of the limiting piece.

[0021] As a preferred solution, the outer side surface of the blocking block away from the limiting groove forms a smooth arc surface with the convex surface.

[0022] As a preferred solution, at least one first elongated through hole is formed on the first cylindrical body.

[0023] The utility model also provides a blood sampling device for preventing a blood sampling tube from popping out, comprising:

[0024] The blood sampling sleeve has a third tubular body, one end of the third tubular body is closed and the other end is open; the closed end of the third tubular body is provided with a connector, and the outer wall of the open end is integrally formed with a blocking flange;

[0025] A puncture needle is arranged inside the blood sampling sleeve and connected to one end of the connector located inside the blood sampling sleeve;

[0026] A protective soft sleeve, which is sleeved on the outside of the puncture needle and can be pierced by the puncture needle;

[0027] A blood collection needle, one end of which is a bleeding hose and the other end is a needle, and the bleeding hose is connected to the connector;

[0028] It also includes a limiting structure, which is any of the limiting structures described above.

[0029] As a preferred solution, the bleeding hose comprises a hose body, and an insertion portion arranged at one end of the hose body for mating with a connector; the outer diameter of the insertion portion is smaller than the inner diameter of the connector;

[0030] A limiting ring is also provided on the hose main body, and the portion of the hose main body located between the limiting ring and the insertion portion is a sealing section. Along the direction from the insertion portion to the limiting ring, the outer diameter of the sealing section gradually increases from small to large, and the outer diameter of the small end of the sealing section is smaller than the inner diameter of the connector, and the large end is larger than the inner diameter of the connector.

[0031] As a preferred solution, the needle structure is hollow, one end of which is a pointed design, and the other end is a hand-held part, and the hand-held part is connected to the bleeding hose.

[0032] The technical solution provided by the utility model has the following advantages:

[0033] 1. The utility model provides a limiting structure for preventing a blood sampling tube from popping out, comprising a first limiting member and a second limiting member; wherein the first limiting member comprises a first tubular body, the inner diameter of which is larger than the outer diameter of a blood sampling sleeve, a blocking surface and a limiting groove are provided at one end of the first tubular body, the blocking surface can block the blocking flange of the blood sampling sleeve, and the limiting groove has an inlet and outlet; the second limiting member comprises a second tubular body, one end of which is open and the other end is closed, the inner diameter of which is larger than the outer diameter of the blood sampling tube, and a limiting plate is provided at the open end of the second tubular body.

[0034] When collecting blood, first, the first limiting piece is sleeved on the outside of the blood sampling sleeve so that the blocking surface of the first limiting piece abuts against the blocking flange of the blood sampling sleeve; the second limiting piece is sleeved on the outside of the blood sampling tube, specifically, the open end of the second tubular body of the second limiting piece is sleeved on the blood sampling tube from the tail end of the blood sampling tube until the closed end of the second tubular body abuts against the tail end of the blood sampling tube; then the blood sampling tube sleeved with the second limiting piece is sent into the interior of the blood sampling sleeve, and the puncture needle is inserted into the interior of the blood sampling tube for blood collection, at this time, the limiting piece arranged on the second limiting piece can be rotated from the inlet and outlet into the limiting groove, thereby temporarily fixing the blood sampling tube inside the blood sampling sleeve; when the blood collection is completed and the blood sampling tube needs to be pulled out, the second limiting piece is rotated in the opposite direction, the limiting piece is screwed out from the inlet and outlet of the limiting groove, and then the second limiting piece and the blood sampling tube are pulled out from the inside of the blood sampling sleeve by hand, and the blood sampling tube can be pulled out to complete blood collection. The limiting structure of the utility model for preventing the blood sampling tube from popping out can temporarily fix the blood sampling tube and the blood sampling device during blood sampling, and there is no need to continuously press the blood sampling tube by hand during the blood sampling process, thus freeing both hands and being easy to use.

[0035] 2. The utility model is used to prevent the blood collection tube from popping out. The second cylindrical body of the second limiting member is open at both ends, and one end is divided into at least two main body pieces by at least two second long through holes. The main body piece is elastic, and a limiting piece is provided on the outer wall of the end of the main body piece, and a limiting surface is provided on the inner wall of the end. When blood is collected, the first limiting member is firstly sleeved on the outside of the blood collection sleeve so that the blocking surface of the first limiting member abuts against the blocking flange of the blood collection sleeve; the second limiting member is sleeved on the outside of the blood collection tube, specifically, the first limiting member is used to seal the blood collection tube. Any open end of the two cylindrical bodies is sleeved on the outside of the blood collection tube, and the limiting surface arranged on the inner wall of the end of the main body piece holds the blood collection tube tightly and fixes it; then the blood collection tube sleeved with the second limiting piece is sent into the blood collection sleeve, and the puncture needle is inserted into the blood collection tube for blood collection. At this time, the limiting piece arranged on the main body piece can be rotated from the inlet and outlet into the limiting groove, so that the blood collection tube is temporarily fixed inside the blood collection sleeve; when the blood collection is completed and the blood collection tube needs to be pulled out, just pinch the tail end of the blood collection tube with your hands and pull it out. The limiting structure of the utility model for preventing the blood collection tube from popping out provides another way to temporarily fix and release the blood collection tube, and can also achieve the process of blood collection without continuously pressing the blood collection tube with your hands, which can free your hands and is easy to use.

[0036] 3. The utility model is a limiting structure for preventing the blood collection tube from popping out, and the first limiting member includes a first cylindrical body, a blocking surface, a connecting surface and a convex surface; wherein there are at least two convex surfaces, which form at least two limiting grooves with the blocking surface; the limiting groove is used to limit the limiting piece, and after the limiting piece enters the limiting groove, it can prevent the limiting piece from being pulled out, and when the second limiting member is sleeved on the outside of the blood collection tube, the blood collection tube can be limited or released by adjusting the positional relationship between the second limiting member and the first limiting member.

[0037] 4. The utility model is a limiting structure for preventing the blood collection tube from popping out, and a blocking block is arranged at one end of the limiting groove, and the blocking block is used to help the user directly rotate the limiting piece to the target position; the distance between two adjacent convex surfaces is greater than or equal to the width of the limiting piece, and when the limiting piece is rotated out of the limiting groove, it can be pulled out vertically and quickly.

[0038] 5. The limiting structure of the utility model for preventing the blood collection tube from popping out has a smooth arc surface between the blocking block and the convex surface. The setting of the arc surface can directly guide the limiting piece to leave the first limiting member after the limiting piece is screwed out of the limiting groove, thereby quickly separating the first limiting member and the second limiting member. The above setting makes the operation of the second limiting member leaving the first limiting member simpler and more convenient.

[0039] 6. The utility model has a limiting structure for preventing the blood collection tube from popping out. A first long through hole is provided on the first cylindrical body, and a second long through hole is provided on the second cylindrical body. After the first long through hole or the second long through hole is provided, the fingers can directly contact the blood collection sleeve or the blood collection tube during the insertion and removal operations, making it convenient for the user to apply force to pull them out.

[0040] 7. The utility model also provides a blood collection device for preventing the blood collection tube from popping out, comprising a blood collection sleeve, a puncture needle, a protective soft sleeve, a blood collection needle and a limiting structure; wherein the blood collection sleeve has a third tubular body, one end of the third tubular body is closed, and the other end is open, the closed end is provided with a connector, and a blocking flange is integrally formed on the outer wall of the open end; the puncture needle is arranged inside the blood collection sleeve and is connected to one end of the connector located inside the blood collection sleeve; the protective soft sleeve is arranged outside the puncture needle and can be pierced by the puncture needle; one end of the blood collection needle is a bleeding hose, and the other end is a needle, and the bleeding hose is connected to the connector.

[0041] The utility model discloses a blood sampling device for preventing a blood sampling tube from popping out, and adds a limiting structure on the basis of an existing blood sampling device. During the blood sampling process, there is no need to continuously press the blood sampling tube with hands, which can free hands, reduce misoperation, and is more convenient to use.

[0042] 8. The utility model is a blood collection device for preventing the blood collection tube from popping out. A limiting ring is provided on the main body of the hose. The outer diameter of the sealing section gradually increases from a small diameter to a large diameter. The limiting ring can prevent the bleeding hose from entering too deeply into the blood collection tube. The sealing section can seal the connector to prevent contaminants from entering and affecting the blood test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation methods of the present utility model, the drawings used in the description of the prior art or the specific implementation methods are briefly introduced below.

[0044] Figure 1The utility model is a schematic diagram of the overall structure of a blood sampling device for preventing a blood sampling tube from popping out.

[0045] Figure 2 yes Figure 1 Schematic diagram of the structure of the first limit member.

[0046] Figure 3 yes Figure 2 Another stereoscopic view of .

[0047] Figure 4 yes Figure 1 Schematic diagram of the structure of the second limit member.

[0048] Figure 5 yes Figure 1 A schematic diagram of another structural form of the second limit member.

[0049] Figure 6 yes Figure 1 Schematic diagram of the structure of the blood sampling sleeve.

[0050] Figure 7 yes Figure 6 Another stereoscopic view of .

[0051] Figure 8 yes Figure 1 Schematic diagram of the structure of the blood collection needle.

[0052] Fig. 9 It is a schematic diagram of the structure of a blood collection tube.

[0053] Figure numerals: 1. first limiting member; 11. first tubular body; 12. blocking surface; 13. limiting groove; 14. inlet and outlet; 15. connecting surface; 16. convex surface; 17. blocking block; 18. first long through hole; 2. second limiting member; 21. second tubular body; 22. limiting plate; 23. second long through hole; 24. main body plate; 25. limiting surface; 3. blood collection tube; 4. blood collection sleeve; 41. third tubular body; 42. blocking flange; 43. connector; 5. blood collection needle; 51. bleeding hose; 52. needle; 510. hose main body; 511. insertion part; 512. sealing section; 513. limiting ring; 520. hand-held part. DETAILED DESCRIPTION

[0054] In order to make those skilled in the art better understand the present solution, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0055] It should be noted that the terms "first", "second", etc. in the claims and description of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not limited to those steps or units clearly listed, but may also include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

[0057] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. Example 1

[0058] This embodiment provides a limiting structure for preventing the blood collection tube from popping out. Figure 2-7 As shown, it includes: a first limiting member 1 and a second limiting member 2; wherein the first limiting member 1 has a first tubular body 11, and the inner diameter of the first tubular body 11 is larger than the outer diameter of the blood sampling sleeve 4; one end of the first tubular body 11 is provided with a blocking surface 12 and a limiting groove 13, the blocking surface 12 can block each other with the blocking flange 42 of the blood sampling sleeve 4, and the limiting groove 13 has an inlet and outlet 14; the second limiting member 2 has a second tubular body 21; one end of the second tubular body 21 is open and the other end is closed, and the inner diameter of the second tubular body 21 is larger than the outer diameter of the blood sampling tube 3, and a limiting plate 22 is provided on the open end of the second tubular body 21.

[0059] The limiting piece 22 can be screwed into the limiting groove 13 from the inlet and outlet 14 to limit the blood sampling tube 3 inside the blood sampling sleeve 4, and can also be screwed out of the limiting groove 13 from the inlet and outlet 14 to release the limiting of the blood sampling tube 3.

[0060] When sampling blood, firstly, the first limiting member 1 is sleeved on the outside of the blood sampling sleeve 4, so that the blocking surface 12 of the first limiting member 1 abuts against the blocking flange 42 of the blood sampling sleeve 4; the second limiting member 2 is sleeved on the outside of the blood sampling tube 3, specifically, the open end of the second tubular body 21 of the second limiting member 2 is sleeved on the blood sampling tube 3 from the rear end of the blood sampling tube 3 until the closed end of the second tubular body 21 abuts against the rear end of the blood sampling tube 3; then the blood sampling tube 3 sleeved with the second limiting member 2 is sent into the blood sampling sleeve 4, and The puncture needle is inserted into the blood collection tube 3 to collect blood. At this time, the limiting piece 22 set on the second limiting member 2 can be rotated from the inlet and outlet 14 into the limiting groove 13, so that the blood collection tube 3 is temporarily fixed inside the blood collection sleeve 4; when the blood collection is completed and the blood collection tube 3 needs to be pulled out, the second limiting member 2 is rotated in the opposite direction to rotate the limiting piece 22 out of the inlet and outlet 14 of the limiting groove 13, and then the second limiting member 2 and the blood collection tube 3 are pulled out from the blood collection sleeve 4 by hand, and the blood collection tube 3 can be pulled out to complete the blood collection. The limiting structure for preventing the blood collection tube 3 from popping out of this embodiment can temporarily fix the blood collection tube 3 and the blood collection device during blood collection. There is no need to continuously press the blood collection tube 3 by hand during the blood collection process, which frees both hands and is convenient to use.

[0061] like Figure 4 and 5 As shown, at least one second long through hole 23 is provided on the second cylindrical body 21. After the first long through hole 18 or the second long through hole 23 is provided, the fingers can directly contact the blood sampling sleeve 4 or the blood sampling tube 3 during the insertion and removal operation, so that the user can apply force to pull out.

[0062] This embodiment also provides a deformation design of the limiting structure for preventing the blood collection tube from popping out, such as Figure 2-7 As shown, the first limiting member 1 has a first tubular body 11, and the inner diameter of the first tubular body 11 is larger than the outer diameter of the blood sampling sleeve 4; one end of the first tubular body 11 is provided with a blocking surface 12 and a limiting groove 13, the blocking surface 12 can block each other with the blocking flange 42 of the blood sampling sleeve 4, and the limiting groove 13 has an inlet and outlet 14; the second limiting member 2 has a second tubular body 21; both ends of the second tubular body 21 are open, and the inner diameter is larger than the outer diameter of the blood sampling tube 3; one end of the second tubular body 21 is divided into at least two main body pieces 24 by at least two second long through holes 23 opened on the outer wall, and a limiting piece 22 is provided on the outer wall of the end of each main body piece 24, and a limiting surface 25 for limiting the blood sampling tube 3 is provided on the inner wall of the end of each main body piece 24.

[0063] The limiting piece 22 can be screwed into the limiting groove 13 from the inlet and outlet 14 to limit the blood sampling tube 3 inside the blood sampling sleeve 4, and can also be screwed out of the limiting groove 13 from the inlet and outlet 14 to release the limiting of the blood sampling tube 3.

[0064] When sampling blood, firstly, the first limiting member 1 is sleeved on the outside of the blood sampling sleeve 4, so that the blocking surface 12 of the first limiting member 1 abuts against the blocking flange 42 of the blood sampling sleeve 4; the second limiting member 2 is sleeved on the outside of the blood sampling tube 3, specifically, any open end of the second tubular body 21 of the second limiting member 2 is sleeved on the outside of the blood sampling tube 3, and the limiting surface 25 arranged on the inner wall of the end of the main body piece 24 holds the blood sampling tube 3 tightly and fixes it; then, the blood sampling tube 3 sleeved with the second limiting member 2 is sent into the inside of the blood sampling sleeve 4, and the puncture needle is inserted into the inside of the blood sampling tube 3 for blood sampling. At this time, the limiting piece 22 arranged on the main body piece 24 can be rotated from the inlet and outlet 14 into the limiting groove 13, so that the blood sampling tube 3 is temporarily fixed inside the blood sampling sleeve 4; when the blood sampling is completed and the blood sampling tube 3 needs to be pulled out, just pinch the tail end of the blood sampling tube 3 with your hand and pull it out. The limiting structure of the present embodiment for preventing the blood collection tube 3 from popping out provides another way to temporarily fix and release the blood collection tube 3, and can also achieve the situation that there is no need to continuously press the blood collection tube 3 with hands during the blood collection process, thus freeing both hands and facilitating use.

[0065] Specifically, Figure 2 and 3 As shown, the first limiting member 1 comprises a first cylindrical body 11; the blocking surface 12 is annular, the inner ring surface is connected to the outer side surface of one end of the first cylindrical body 11, and is substantially perpendicular to the outer wall of the first cylindrical body 11; the connecting surface 15 is cylindrical, one end is connected to the outer circumference of the blocking surface 12, and the other end extends in a direction away from the first cylindrical body 11, and is substantially perpendicular to the blocking surface 12; there are at least two convex surfaces 16, which are connected to the outer end surface of the connecting surface 15 and are parallel to and opposite to the blocking surface 12 to form at least two limiting grooves 13. The limiting groove 13 is used to limit the limiting piece 22. After the limiting piece 22 enters the limiting groove 13, it can prevent the limiting piece 22 from being pulled out. When the second limiting member 2 is sleeved on the outside of the blood collection tube 3, the blood collection tube 3 can be limited or released by adjusting the positional relationship between the second limiting member 2 and the first limiting member 1.

[0066] Preferably, it also includes a blocking block 17 arranged at one end of the limiting groove 13; the blocking block 17 is used to help the user directly rotate the limiting plate 22 to the target position; the spacing distance between two adjacent convex surfaces 16 is greater than or equal to the width of the limiting plate 22, and when the limiting plate 22 is rotated out of the limiting groove 13, it can be pulled out vertically and quickly.

[0067] The outer side surface of the blocking block 17 away from the limiting groove 13 forms a smooth arc surface with the convex surface 16. The setting of the arc surface can directly guide the limiting plate 22 to leave the first limiting member 1 after being screwed out of the limiting groove 13, so that the first limiting member 1 and the second limiting member 2 are quickly separated. The above setting makes the operation of the second limiting member 2 leaving the first limiting member 1 simpler and more convenient.

[0068] At least one first elongated through hole 18 is defined in the first cylindrical body 11 . Example 2

[0069] This embodiment provides a blood collection device for preventing a blood collection tube from popping out. Figure 1 , 8 As shown in and 9, it includes: a blood collection sleeve 4, a puncture needle, a protective soft sleeve, a blood collection needle 5 and a limiting structure; wherein the blood collection sleeve 4 has a third tubular body 41, one end of the third tubular body 41 is closed, and the other end is open; the closed end of the third tubular body 41 is provided with a connector 43, and the outer wall of the open end is integrally formed with a blocking flange 42; the puncture needle is arranged inside the blood collection sleeve 4, and is connected to one end of the connector 43 located inside the blood collection sleeve 4; the protective soft sleeve is arranged on the outside of the puncture needle and can be pierced by the puncture needle; one end of the blood collection needle 5 is a bleeding hose 51, and the other end is a needle 52, and the bleeding hose 51 is connected to the connector 43.

[0070] The blood sampling device for preventing the blood sampling tube 3 from popping out of the present embodiment adds a limiting structure on the basis of the existing blood sampling device. During the blood sampling process, there is no need to continuously press the blood sampling tube 3 with hands, which can free both hands, reduce misoperation, and is more convenient to use.

[0071] like Figure 8 As shown, the bleeding hose 51 includes a hose body 510, and an insertion portion 511 arranged at one end of the hose body 510 for matching and plugging with the connector 43; the outer diameter of the insertion portion 511 is smaller than the inner diameter of the connector 43; a limiting ring 513 is also provided on the hose body 510, and the portion of the hose body 510 located between the limiting ring 513 and the insertion portion 511 is a sealing section 512, and along the direction from the insertion portion 511 to the limiting ring 513, the outer diameter of the sealing section 512 gradually increases from small to large, the outer diameter of the small end of the sealing section 512 is smaller than the inner diameter of the connector 43, and the large end is larger than the inner diameter of the connector 43; the limiting ring 513 can prevent the bleeding hose 51 from entering too deeply into the blood collection tube 3, and the sealing section 512 can seal the connector 43 to prevent contaminants from entering and affecting the blood test results.

[0072] The needle 52 is hollow in structure, one end of which is a pointed tip and the other end of which is a hand-held portion 520 . The hand-held portion 520 is connected to the bleeding hose 51 .

[0073] The blood sampling device for preventing the blood sampling tube from popping out in this embodiment is used as follows: when sampling blood, firstly, the first limiting member 1 is sleeved on the outside of the blood sampling sleeve 4, so that the blocking surface 12 of the first limiting member 1 abuts against the blocking flange 42 of the blood sampling sleeve 4; the second limiting member 2 is sleeved on the outside of the blood sampling tube 3, specifically, the open end of the second tubular body 21 of the second limiting member 2 is sleeved on the blood sampling tube 3 from the rear end of the blood sampling tube 3 until the closed end of the second tubular body 21 abuts against the rear end of the blood sampling tube 3; then the blood sampling tube 3 sleeved with the second limiting member 2 is sent into the interior of the blood sampling sleeve 4, and the puncture needle is inserted into the blood sampling tube 3 At this time, the limiting piece 22 arranged on the second limiting member 2 can be rotated from the inlet and outlet 14 into the limiting groove 13, so that the blood sampling tube 3 is temporarily fixed inside the blood sampling sleeve 4; after the fixation is completed, the blood sampling needle 5 is inserted into the part of the human body where blood needs to be collected, and under the action of the negative pressure in the blood sampling tube 3, the blood is injected into the blood sampling tube 3 from the bleeding hose 51; when the blood sampling is completed and the blood sampling tube 3 needs to be pulled out, the second limiting member 2 is rotated in the opposite direction to unscrew the limiting piece 22 from the inlet and outlet 14 of the limiting groove 13, and then the second limiting member 2 and the blood sampling tube 3 are pulled out from the inside of the blood sampling sleeve 4 by hand, and the blood sampling tube 3 can be pulled out to complete the blood sampling.

[0074] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of this innovative technical solution.

Claims

1. A limiting structure for preventing a blood collection tube from popping out, characterized in that: include: The first limiting member (1) comprises a first tubular body (11), the inner diameter of the first tubular body (11) being larger than the outer diameter of the blood sampling sleeve (4); a blocking surface (12) and a limiting groove (13) are provided at one end of the first tubular body (11), the blocking surface (12) being capable of blocking the blocking flange (42) of the blood sampling sleeve (4), and the limiting groove (13) having an inlet and outlet (14); The second limiting member (2) comprises a second tubular body (21); one end of the second tubular body (21) is open and the other end is closed, and the inner diameter of the second tubular body (21) is larger than the outer diameter of the blood collection tube (3); a limiting plate (22) is provided on the open end of the second tubular body (21); The limiting plate (22) can be screwed into the limiting groove (13) from the inlet and outlet (14), thereby limiting the blood sampling tube (3) inside the blood sampling sleeve (4), and can also be screwed out of the limiting groove (13) from the inlet and outlet (14), thereby releasing the limiting of the blood sampling tube (3).

2. The limiting structure for preventing the blood collection tube from popping out according to claim 1, characterized in that: At least one second elongated through hole (23) is formed on the second cylindrical body (21).

3. A limiting structure for preventing a blood collection tube from popping out, characterized in that: include: The first limiting member (1) comprises a first tubular body (11), the inner diameter of the first tubular body (11) being larger than the outer diameter of the blood sampling sleeve (4); a blocking surface (12) and a limiting groove (13) are provided at one end of the first tubular body (11), the blocking surface (12) being capable of blocking the blocking flange (42) of the blood sampling sleeve (4), and the limiting groove (13) having an inlet and outlet (14); The second limiting member (2) comprises a second tubular body (21); both ends of the second tubular body (21) are open, and the inner diameter is larger than the outer diameter of the blood sampling tube (3); one end of the second tubular body (21) is divided into at least two main body pieces (24) by at least two second long through holes (23) formed on the outer wall, and a limiting piece (22) is provided on the outer wall at the end of each main body piece (24), and a limiting surface (25) for limiting the blood sampling tube (3) is provided on the inner wall at the end of each main body piece (24); The limiting plate (22) can be screwed into the limiting groove (13) from the inlet and outlet (14), thereby limiting the blood sampling tube (3) inside the blood sampling sleeve (4), and can also be screwed out of the limiting groove (13) from the inlet and outlet (14), thereby releasing the limiting of the blood sampling tube (3).

4. The limiting structure for preventing the blood collection tube from popping out according to claim 1 or 3, characterized in that: The first limiting member (1) comprises: The first cylindrical body (11); The blocking surface (12) is in the shape of a circular ring, the inner surface of which is connected to the outer surface of one end of the first cylindrical body (11) and is substantially perpendicular to the outer wall of the first cylindrical body (11); The connecting surface (15) is cylindrical, one end of which is connected to the outer circumference of the blocking surface (12), and the other end of which extends in a direction away from the first cylindrical body (11) and is substantially perpendicular to the blocking surface (12); There are at least two convex surfaces (16), which are connected to the outer end surface of the connecting surface (15) and are parallel to and opposite to the blocking surface (12) to form at least two limiting grooves (13).

5. The limiting structure for preventing the blood collection tube from popping out according to claim 4, characterized in that: It also includes a blocking block (17) disposed at one end of the limiting groove (13); the spacing distance between two adjacent convex surfaces (16) is greater than or equal to the width of the limiting piece (22).

6. The limiting structure for preventing the blood collection tube from popping out according to claim 5, characterized in that: The outer side surface of the blocking block (17) away from the limiting groove (13) forms a smooth arc surface with the convex surface (16).

7. The limiting structure for preventing the blood collection tube from popping out according to claim 1 or 3, characterized in that: At least one first elongated through hole (18) is formed on the first cylindrical body (11).

8. A blood collection device for preventing a blood collection tube from popping out, characterized in that: include: The blood sampling sleeve (4) comprises a third tubular body (41), one end of the third tubular body (41) is closed and the other end is open; a connector (43) is provided at the closed end of the third tubular body (41), and a blocking flange (42) is integrally formed on the outer wall of the open end; A puncture needle, arranged inside the blood sampling sleeve (4), connected to one end of the connector (43) located inside the blood sampling sleeve (4); A protective soft sleeve, which is sleeved on the outside of the puncture needle and can be pierced by the puncture needle; A blood collection needle (5), one end of which is a bleeding hose (51) and the other end of which is a needle (52), wherein the bleeding hose (51) is connected to the connector (43); It also includes a limiting structure, which is the limiting structure according to any one of claims 1 to 7.

9. The blood sampling device for preventing the blood sampling tube from popping out according to claim 8, characterized in that: The bleeding hose (51) comprises a hose body (510), and an insertion portion (511) arranged at one end of the hose body (510) and used for mating and plugging with a connector (43); the outer diameter of the insertion portion (511) is smaller than the inner diameter of the connector (43); A limiting ring (513) is also provided on the hose main body (510); the portion of the hose main body (510) located between the limiting ring (513) and the inserting portion (511) is a sealing section (512); along the direction from the inserting portion (511) to the limiting ring (513), the outer diameter of the sealing section (512) gradually increases from small to large; the outer diameter of the small end of the sealing section (512) is smaller than the inner diameter of the connecting head (43), while the outer diameter of the large end is larger than the inner diameter of the connecting head (43).

10. The blood sampling device for preventing the blood sampling tube from popping out according to claim 8, characterized in that: The needle (52) has a hollow structure, one end of which is a pointed design, and the other end of which is a hand-held portion (520), and the hand-held portion (520) is connected to the bleeding hose (51).

Images