Blood sampling device

Abstract

The invention relates to the field of medical auxiliary instruments, in particular to a blood sampling device. A first mounting position, a second mounting position and a third mounting position are arranged in a main body of the blood sampling device, the first mounting position is used for mounting a blood sampling needle, the second mounting position is used for mounting a waste liquid tube, and the third mounting position is used for mounting a blood sampling tube; the first connector, the second connector and the third connector are all communicated with the liquid guide pipe; the three-way valve is connected with the liquid guide pipe and used for enabling the first connector to be communicated with one of the second connector and the third connector or to be disconnected from the second connector and the third connector. Wherein the first connector is used for being in butt joint with a blood sampling needle located at the first installation position, the second connector is used for being in butt joint with a waste liquid tube located at the second installation position, and the third connector is used for being in butt joint with a blood sampling tube located at the third installation position. The blood sampling device is simple in structure, convenient to use and capable of assisting a user in blood sampling work in a specific time period, and therefore the convenience of blood sampling work can be improved.

Description

Technical Field

[0001] The present application relates to the field of medical auxiliary equipment, and in particular, to a blood collection device. Background Art

[0002] At present, some departments or some users need to draw blood during a specific time period, but the existing blood collection methods require medical staff to draw blood manually. This blood collection method has many inconveniences, resulting in the inability to accurately control the time of blood collection. Summary of the invention

[0003] The present application provides a blood collection device to improve the above-mentioned problems.

[0004] The present invention is specifically as follows: A blood sampling device, comprising a main body, a liquid guide tube, a first joint, a second joint, a third joint and a three-way valve; The main body is provided with a first mounting position, a second mounting position and a third mounting position, the first mounting position is used to mount a blood collection needle, the second mounting position is used to mount a waste liquid tube, and the third mounting position is used to mount a blood collection tube; The liquid guiding tube, the first connector, the second connector and the third connector are all installed in the main body, and the first connector, the second connector and the third connector are all connected to the liquid guiding tube; the three-way valve is connected to the liquid guiding tube, and is used to make the first connector connected to one of the second connector and the third connector, or to block the first connector from the second connector and the third connector; Among them, the first connector is used to connect with the blood collection needle located at the first installation position, the second connector is used to connect with the waste liquid pipe located at the second installation position, and the third connector is used to connect with the blood collection tube located at the third installation position.

[0005] In one embodiment of the present invention, a fourth installation position is further configured in the main body, and the fourth installation position is used to install a liquid injection tube containing a tube-sealing liquid; The blood sampling device further comprises a fourth connector, which is installed in the main body and is connected to the segment where the liquid guiding tube is connected to the second connector; The fourth connector is used for docking with the injection tube, and when the three-way valve connects the first connector with the second connector, the first connector is connected with the fourth connector.

[0006] In one embodiment of the present invention, a first movable groove and a liquid injection pick movably matched with the first movable groove are provided on the side surface of the main body; The injection paddle is used to abut against the injection tube and move along the first movable groove under the action of external force, so as to push the sealing liquid in the injection tube into the blood collection needle through the liquid guide tube and the first connector when the three-way valve connects the first connector with the fourth connector.

[0007] In one embodiment of the present invention, a second movable groove and a liquid-stopping clip movably matched with the second movable groove are provided on the side of the main body; the liquid-stopping clip is used to move along the second movable groove under the action of external force to clamp the tube body of the blood collection needle to stop the liquid; The first movable groove and the second movable groove are located on different sides of the main body.

[0008] In one embodiment of the present invention, the blood collection device further includes a movable cover and a mounting strap; The movable cover is movably connected to the main body, and the movable cover is used to open or close the main body; The mounting belt is connected to the main body, and is used to be wound around the wrist of the user so that the main body is worn on the user.

[0009] In one embodiment of the present invention, the blood collection device also includes a controller disposed in the main body, the controller is electrically connected to the three-way valve, and the controller is used to control the three-way valve to connect the first connector with the second connector, or to connect the first connector with the third connector.

[0010] In one embodiment of the present invention, a flow meter is provided in the section of the liquid guiding tube that connects the first connector and the third connector, and the flow meter is electrically connected to the controller.

[0011] In one embodiment of the present invention, a vibration motor electrically connected to the controller is disposed in the main body.

[0012] In one embodiment of the present invention, two first positioning members, two second positioning members, and two third positioning members are disposed in the main body; The two first positioning members are spaced apart to form a first installation position facing the first joint; the two second positioning members are spaced apart to form a second installation position facing the second joint; and the two third positioning members are spaced apart to form a third installation position facing the third joint.

[0013] In one embodiment of the present invention, the first positioning member, the second positioning member and the third positioning member each include a positioning platform, a holding block and an elastic member; The positioning platform is connected to the main body, the abutting block is movably connected to the positioning platform, and the elastic member is connected to the positioning platform and the abutting block, and is used to make the abutting block have a tendency to move toward the first joint, the second joint or the third joint; The positioning platform is held against the outer periphery of the blood collection needle, the waste liquid tube and the blood collection tube, and the holding block is used to hold against the step portion of the outer periphery of the blood collection needle, the waste liquid tube and the blood collection tube.

[0014] The beneficial effects of the present invention are: The blood sampling device includes a main body, a liquid guide tube, a first connector, a second connector, a third connector and a three-way valve; the main body is provided with a first installation position, a second installation position and a third installation position, the first installation position is used to install a blood collection needle, the second installation position is used to install a waste liquid pipe, and the third installation position is used to install a blood collection tube; the liquid guide tube, the first connector, the second connector and the third connector are all installed in the main body, and the first connector, the second connector and the third connector are all connected to the liquid guide tube; the three-way valve is connected to the liquid guide tube, and is used to make the first connector conduct with one of the second connector and the third connector, or block with the second connector and the third connector; wherein the first connector is used to connect with the blood collection needle located at the first installation position, the second connector is used to connect with the waste liquid pipe located at the second installation position, and the third connector is used to connect with the blood collection tube located at the third installation position. The blood sampling device has a simple structure and is easy to use. It can assist the user in performing blood sampling work in a specific time period, thereby improving the convenience of blood sampling work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of the blood sampling device provided in this application from the first perspective; Figure 2 A schematic diagram of the structure of the blood sampling device provided in this application from a second perspective; Figure 3 A schematic diagram of the connection of the blood sampling device provided in this application from the first perspective; Figure 4 A schematic diagram of the structure of the subject provided for this application; Figure 5 This is a schematic structural diagram of the first positioning member provided in this application.

[0017] Icons: 100-blood collection device; 110-main body; 120-liquid guide tube; 130-first connector; 140-second connector; 150-third connector; 160-three-way valve; 111-first installation position; 112-second installation position; 113-third installation position; 10-blood collection needle; 20-waste liquid pipe; 30-blood collection tube; 114-fourth installation position; 170-fourth connector; 115-first movable groove; 116-liquid injection paddle; 117-second movable groove; 118-liquid stop clip; 181-movable cover; 182-mounting belt; 183-controller; 184-flow meter; 185-vibration motor; 191-first positioning member; 192-second positioning member; 193-third positioning member; 194-positioning platform; 195-holding block; 196-elastic member. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, 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 part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0024] Please refer to Figure 1-Figure 5 , this embodiment provides a blood collection device 100, the blood collection device 100 includes a main body 110, a liquid guide tube 120, a first connector 130, a second connector 140 and a third connector 150 and a three-way valve 160; The main body 110 is provided with a first mounting position 111, a second mounting position 112 and a third mounting position 113. The first mounting position 111 is used to mount the blood collection needle 10, the second mounting position 112 is used to mount the waste liquid tube 20, and the third mounting position 113 is used to mount the blood collection tube 30. The catheter 120, the first connector 130, the second connector 140 and the third connector 150 are all installed in the main body 110, and the first connector 130, the second connector 140 and the third connector 150 are all connected to the catheter 120; the three-way valve 160 is connected to the catheter 120 and is used to make the first connector 130 communicate with the second connector 140 or the third connector 150; Among them, the first connector 130 is used to connect with the blood collection needle 10 located at the first installation position 111, the second connector 140 is used to connect with the waste liquid pipe 20 located at the second installation position 112, and the third connector 150 is used to connect with the blood collection tube 30 located at the third installation position 113.

[0025] Please refer to Figure 1-Figure 5 The working principle of the blood sampling device 100 is: First, the blood collection device 100 can be worn on the wrist of the user and communicated with the blood collection needle 10 pre-placed on the wrist of the user and connected to the blood vessel, and then the blood collection work can be completed within a predetermined time period by controlling the conduction state between the blood collection needle 10 and the blood collection tube 30; It should be noted that when the blood collection needle 10 is configured, it can be an indwelling needle or a venous needle in the prior art. Taking the indwelling needle as an example, when it is connected to the blood collection device 100, the connector of the indwelling needle for connecting with the infusion tube is placed in the main body 110 and connected with the first connector 130; in addition, the blood collection device 100 collects venous blood; Specifically, the blood collection device 100 includes a main body 110, a liquid guide tube 120, a first connector 130, a second connector 140, a third connector 150 and a three-way valve 160; wherein, a first mounting position 111, a second mounting position 112 and a third mounting position 113 are arranged in the main body 110, the first mounting position 111 is used to install the blood collection needle 10, the second mounting position 112 is used to install the waste liquid tube 20, and the third mounting position 113 is used to install the blood collection tube 30; and when configuring the first mounting position 111, the second mounting position 112 and the third mounting position 113, they can be flexibly adjusted based on the spatial position in the main body 110, the purpose of which is to reduce the structural size of the main body 110, and in this embodiment, in order to facilitate the description of its structure, the first mounting position 111, the second mounting position 112 and the third mounting position 113 are arranged in the same plane; The liquid guide tube 120, the first connector 130, the second connector 140 and the third connector 150 are all installed in the main body 110, and the first connector 130, the second connector 140 and the third connector 150 are all connected to the liquid guide tube 120; the three-way valve 160 is connected to the liquid guide tube 120, and is used to make the first connector 130 conduct with one of the second connector 140 and the third connector 150, or block the second connector 140 and the third connector 150; and the first connector 130 is used to dock with the blood collection needle 10 located at the first installation position 111, the second connector 140 is used to dock with the waste liquid pipe 20 located at the second installation position 112, and the third connector 150 is used to dock with the blood collection tube 30 located at the third installation position 113; Thus, through the above-mentioned structural setting, the main body 110 has the structural conditions for installing the blood collection needle 10, the waste liquid tube 20 and the blood collection tube 30, and then, the blood collection needle 10, the waste liquid tube 20 and the blood collection tube 30 can be installed in the first installation position 111, the second installation position 112 and the third installation position 113 respectively, and the blood collection needle 10, the waste liquid tube 20 and the blood collection tube 30 are respectively connected to the first connector 130, the second connector 140 and the third connector 150, and then the three-way valve 160 can be adjusted to make the first connector 130 conduct with one of the second connector 140 and the third connector 150, or block the second connector 140 and the third connector 150; When the first connector 130 is connected to the second connector 140, waste liquid in the blood vessel of the blood collection needle 10 or liquid that may affect the blood collection result can be collected; and when the first connector 130 is connected to the third connector 150, venous blood can be introduced into the blood collection tube 30 through the blood collection needle 10 and the liquid guide tube 120 to complete the blood collection work; Through the above-mentioned structural setting, the state of the three-way valve 160 can be adjusted manually or automatically in a specific time period to complete the blood collection work; it should be pointed out that before the venous blood is introduced into the blood collection tube 30, part of the waste liquid needs to be introduced into the waste liquid tube 20, so as to reduce the influence of the infusion liquid on the subsequent blood collection results after the infusion through the blood collection needle 10.

[0026] It should be noted that in this embodiment, when configuring the waste liquid tube 20 and the blood collection tube 30, they can be set as negative pressure tubes or vacuum tubes, that is, the pressure difference can be utilized so that the waste liquid tube 20 and the blood collection tube 30 can draw the blood or liquid in the catheter 120 and the blood collection needle 10 into the interior thereof for collection.

[0027] In summary, the blood collection device 100 has a simple structure and is easy to use, and can assist the user in collecting blood in a specific time period, thereby improving the convenience of blood collection.

[0028] For further information, please refer to Figure 1-Figure 5 In the present embodiment, after the blood sampling work is completed, in order to facilitate the injection of the sealing liquid, a fourth installation position 114 is further configured in the main body 110, and the fourth installation position 114 is used to install an injection tube for accommodating the sealing liquid; the blood sampling device 100 also includes a fourth connector 170, which is installed in the main body 110 and is connected to the segment connected to the liquid guide tube 120 and the second connector 140; wherein the fourth connector 170 is used to dock with the injection tube, and when the three-way valve 160 connects the first connector 130 with the second connector 140, the first connector 130 is connected to the fourth connector 170.

[0029] The injection tube can be an injection tube structure in the prior art, but its diameter and length are adjusted to make it fit the size inside the main body 110; and such a setting can perform the injection of tube sealing liquid after blood collection is completed, the purpose of which is to maintain the venous access and avoid blockage caused by blood coagulation, and the injected liquid can be isotonic saline, which is used to flush the indwelling needle to keep it unobstructed. The main component of isotonic saline is sodium chloride, and its concentration is similar to that of human blood, which can reduce the impact on blood components.

[0030] For further information, please refer to Figure 1-Figure 5 In this embodiment, when the sealing liquid is injected manually, a first movable groove 115 and a liquid injection paddle 116 movably matched with the first movable groove 115 may be provided on the side of the main body 110; The injection paddle 116 is used to abut against the injection tube and move along the first movable groove 115 under the action of external force, so as to push the sealing liquid in the injection tube into the blood collection needle 10 through the liquid guide tube 120 and the first connector 130 when the three-way valve 160 connects the first connector 130 with the fourth connector 170.

[0031] Therefore, in this way, the user can turn the injection paddle 116 to push the sealing liquid in the injection tube into the blood collection needle 10 through the liquid guide tube 120 and the first connector 130; this arrangement allows the injection tube to be inside the main body 110 and to be operated through the injection paddle 116 on its side, which is beneficial to reducing the structural size of the device and making it convenient to wear and use.

[0032] For further information, please refer to Figure 1-Figure 5 In this embodiment, in order to stop the liquid in the tube body of the blood collection needle 10 after the blood collection is completed, therefore, when the first joint 130 is blocked from the second joint 140 and the third joint 150 by the three-way valve 160, a second movable groove 117 and a liquid-stopping clip 118 that movably cooperates with the second movable groove 117 can also be provided on the side of the main body 110; the liquid-stopping clip 118 is used to move along the second movable groove 117 under the action of external force to clamp the tube body of the blood collection needle 10 to stop the liquid; wherein, the first movable groove 115 and the second movable groove 117 are located on different sides of the main body 110. Thus, in this way, the liquid-stopping clip 118 can be manually operated to clamp the hose of the blood collection needle 10, thereby disconnecting it from the first joint 130.

[0033] To facilitate the use of the blood collection device 100, the blood collection device 100 further includes a movable cover 181 and a mounting belt 182; Among them, the movable cover 181 is movably connected to the main body 110, and the movable cover 181 is used to open or close the main body 110; through such a setting, the interior of the main body 110 can be isolated from the outside world, so that the various tubes and joint structures located inside are relatively closed, so as to maintain the internal sterility and facilitate disinfection, thereby improving its reuse rate.

[0034] The mounting belt 182 is connected to the main body 110, and is used to be wound around the wrist of the user so that the main body 110 is worn on the user. In this way, it can be flexibly mounted on the user's arm; it should be noted that in other embodiments of the present invention, it can also be worn on the user's legs and other positions.

[0035] For further information, please refer to Figure 1-Figure 5 In the present embodiment, in order to improve the automation of the blood collection process, the three-way valve 160 can be set as a structure such as an electromagnetic valve body to facilitate automatic control, thereby facilitating accurate control of the blood collection time; specifically, the blood collection device 100 also includes a controller 183 disposed in the main body 110, and the controller 183 is electrically connected to the three-way valve 160. The controller 183 is used to control the three-way valve 160 to connect the first connector 130 with the second connector 140, or to connect the first connector 130 with the third connector 150.

[0036] Thus, in this way, the controller 183 structure in the prior art can be adopted, and the running program can be set inside it, so that the controller 183 can control the three-way valve 160 according to the pre-input time period, so that the three-way valve 160 is in a state of blocking the first connector 130 with the second connector 140 and the third connector 150 before the blood sampling time is reached, and after the blood sampling time is reached, the three-way valve 160 first connects the first connector 130 with the second connector 140 to facilitate the waste liquid pipe 20 to collect waste liquid, and the process of collecting waste liquid is as described above, so it will not be repeated here; then the first connector 130 is connected with the third connector 150, and then blood is collected, and the process of blood collection by the blood collection tube 30 is as described above, so it will not be repeated here; It should be noted that when the fourth connector 170 and the injection tube are configured, the three-way valve 160 can also connect the first connector 130 with the second connector 140 under the control of the controller 183 after the blood collection tube 30 completes blood collection, so as to facilitate the introduction of the tube sealing liquid.

[0037] On the basis of being provided with the controller 183, the blood sampling device 100 may also be provided with a flow meter 184 at the segment of the liquid guide tube 120 connecting the first connector 130 and the third connector 150, and the flow meter 184 is electrically connected to the controller 183. In this way, the blood sampling volume of the blood sampling tube 30 is monitored, and it is determined whether the blood sampling process is proceeding normally or when the blood sampling action is completed based on the blood sampling volume, so as to timely control the state of the three-way valve 160.

[0038] It should be noted that, in this embodiment, in an abnormal state, the controller 183 blocks the first connector 130 from the second connector 140 and the third connector 150 .

[0039] For further information, please refer to Figure 1-Figure 5 When equipped with a controller 183, in order to serve as a reminder to the user, a vibration motor 185 electrically connected to the controller 183 is provided in the main body 110, so that the blood collection device 100 can remind the user of the progress of blood collection by vibration. It should be noted that voice prompts or a display screen can also be used to provide prompts or display status.

[0040] In addition, the setting of the vibration motor 185 can not only play the role of prompting, but also make the blood collection device 100 vibrate, so as to shake the blood collection tube 30. It should be noted that in this process, by controlling its vibration frequency, it can also play the role of prompting the user to send the blood to the inspection station or the collection point in time after blood collection; at the same time, it can prompt the user to vibrate his wrist to manually shake the blood collection tube 30.

[0041] For further information, please refer to Figure 1-Figure 5 In the present embodiment, in order to facilitate the installation of the above-mentioned blood collection needle 10, waste liquid tube 20 and blood collection tube 30, a first mounting position 111, a second mounting position 112 and a third mounting position 113 are formed in the main body 110. In order to play a role of positioning and installation at the first mounting position 111, the second mounting position 112 and the third mounting position 113, two first positioning members 191, two second positioning members 192 and two third positioning members 193 are arranged in the main body 110; the two first positioning members 191 are arranged at intervals to form a first mounting position 111 that is opposite to the first joint 130; the two second positioning members 192 are arranged at intervals to form a second mounting position 112 that is opposite to the second joint 140; the two third positioning members 193 are arranged at intervals to form a third mounting position 113 that is opposite to the third joint 150.

[0042] Specifically, the first positioning member 191, the second positioning member 192 and the third positioning member 193 each include a positioning platform 194, a supporting block 195 and an elastic member 196; The positioning platform 194 is connected to the main body 110, the abutting block 195 is movably connected to the positioning platform 194, and the elastic member 196 is connected to the positioning platform 194 and the abutting block 195, and is used to make the abutting block 195 have a tendency to move toward the first joint 130, the second joint 140 or the third joint 150; The positioning platform 194 abuts against the outer periphery of the blood collection needle 10 , the waste liquid tube 20 and the blood collection tube 30 , and the abutting block 195 is used to abut against the step portion of the outer periphery of the blood collection needle 10 , the waste liquid tube 20 and the blood collection tube 30 .

[0043] Therefore, through the above-mentioned structural arrangement, the outer periphery of the blood collection needle 10, the waste liquid tube 20 and the blood collection tube 30 can be clamped by the positioning platform 194 arranged in pairs, so as to play a role in positioning and installation; and through the arrangement of the supporting block 195 and the elastic member 196, the blood collection needle 10, the waste liquid tube 20 and the blood collection tube 30 can be moved toward the positions of the corresponding first connector 130, the second connector 140 and the third connector 150, so as to maintain the blood collection needle 10, the waste liquid tube 20 and the blood collection tube 30 respectively docked with the first connector 130, the second connector 140 and the third connector 150, thereby avoiding the state of being out of docking.

[0044] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A blood sampling device, characterized in that: The blood sampling device comprises a main body, a liquid guide tube, a first joint, a second joint, a third joint and a three-way valve; The main body is provided with a first mounting position, a second mounting position and a third mounting position, the first mounting position is used to mount a blood collection needle, the second mounting position is used to mount a waste liquid tube, and the third mounting position is used to mount a blood collection tube; The catheter, the first connector, the second connector and the third connector are all installed in the main body, and the first connector, the second connector and the third connector are all connected to the catheter; the three-way valve is connected to the catheter, and is used to make the first connector connected to one of the second connector and the third connector, or to block the first connector from the second connector and the third connector; Among them, the first connector is used to connect with the blood collection needle located at the first installation position, the second connector is used to connect with the waste liquid pipe located at the second installation position, and the third connector is used to connect with the blood collection tube located at the third installation position.

2. The blood sampling device according to claim 1, characterized in that: A fourth installation position is also provided in the main body, and the fourth installation position is used to install a liquid injection tube containing a tube-sealing liquid; The blood sampling device further comprises a fourth connector, which is installed in the main body and communicates with the segment where the catheter is connected to the second connector; The fourth connector is used for docking with the injection tube, and when the three-way valve connects the first connector with the second connector, the first connector is connected with the fourth connector.

3. The blood sampling device according to claim 2, characterized in that: The side surface of the main body is provided with a first movable groove and a liquid injection paddle movably matched with the first movable groove; The injection paddle is used to abut against the injection tube and move along the first movable groove under the action of external force, so as to push the sealing liquid in the injection tube into the blood collection needle through the catheter and the first connector when the three-way valve connects the first connector with the fourth connector.

4. The blood sampling device according to claim 3, characterized in that: The side of the main body is provided with a second movable groove and a liquid-stopping clip movably matched with the second movable groove; the liquid-stopping clip is used to move along the second movable groove under the action of external force to clamp the tube body of the blood collection needle to stop the liquid; Wherein, the first movable groove and the second movable groove are located on different sides of the main body.

5. The blood sampling device according to claim 1, characterized in that: The blood sampling device also includes a movable cover and a mounting belt; The movable cover is movably connected to the main body, and the movable cover is used to open or close the main body; The mounting belt is connected to the main body, and the mounting belt is used to be wound around the wrist of the user so as to wear the main body on the user.

6. The blood sampling device according to claim 1, characterized in that: The blood collection device also includes a controller disposed in the main body, the controller is electrically connected to the three-way valve, and the controller is used to control the three-way valve to connect the first connector with the second connector, or to connect the first connector with the third connector.

7. The blood sampling device according to claim 6, characterized in that: The section of the catheter that connects the first connector to the third connector is provided with a flow meter, and the flow meter is electrically connected to the controller.

8. The blood sampling device according to claim 6, characterized in that: A vibration motor electrically connected to the controller is arranged in the main body.

9. The blood sampling device according to claim 1, characterized in that: Two first positioning members, two second positioning members and two third positioning members are arranged in the main body; The two first positioning members are spaced apart to form a first installation position opposite to the first joint; the two second positioning members are spaced apart to form a second installation position opposite to the second joint; the two third positioning members are spaced apart to form a third installation position opposite to the third joint.

10. The blood sampling device according to claim 9, characterized in that: The first positioning member, the second positioning member and the third positioning member each include a positioning platform, a supporting block and an elastic member; The positioning platform is connected to the main body, the abutting block is movably connected to the positioning platform, the elastic member is connected to the positioning platform and the abutting block, and is used to make the abutting block have a tendency to move toward the first joint, the second joint or the third joint; The positioning platform is abutted against the outer periphery of the blood collection needle, the waste liquid tube and the blood collection tube, and the abutting block is used to abut against the step portion of the outer periphery of the blood collection needle, the waste liquid tube and the blood collection tube.

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