WO2025223027A1 - Blood sampling device - Google Patents

Abstract

Provided is a blood sampling device, which comprises a scale body (1), a scale pan (2), and a scale pan rotation control mechanism connected between the scale body (1) and the scale pan (2), wherein the scale body (1) is provided with a display host (4) and a weight acquisition sensor (5); the scale pan rotation control mechanism is connected to the lower part of the scale body (1); the weight acquisition sensor (5) is connected to the position of the scale pan rotation control mechanism connected to the scale body (1), and the scale pan rotation control mechanism comprises a driving assembly (6) and a transmission assembly (7) connected to the driving assembly (6); the driving assembly (6) is connected to the scale body (1), and the transmission assembly (7) extends downwards from the lower side of the scale body (1); the scale pan (2) is connected to the lower end of the transmission assembly (7), and the driving assembly (6) drives the transmission assembly (7) to rotate clockwise or anticlockwise to drive the scale pan (2) and a blood bag on the scale pan (2) to rotate clockwise or anticlockwise. By means of a rotating swinging mode, the blood bag can shake more stably, such that the influence of movement of the blood bag on a weighing result is reduced, thereby improving the blood sampling efficiency and accuracy.

Description

A blood collection device

This application claims priority to Chinese Patent Application No. 202410482348.2, filed on April 22, 2024, entitled “A Blood Collection Device”, the entire contents of which are incorporated herein by reference.

Technical Field

This application relates to the technical field of medical devices, and in particular to a blood collection device.

Background Technology

Blood banks are medical and health institutions that collect and store blood and supply it to clinical or blood product manufacturing units. They are divided into blood stations, single-donor plasma collection stations, and blood banks.

Blood collection scales are used when collecting blood at blood banks. Most existing blood collection scales use a left-right swinging structure to prevent blood from clotting. However, left-right swinging blood collection scales have problems such as uneven swinging speed of the weighing pan, intermittent pauses of the weighing pan, and uneven movement, resulting in low blood collection efficiency and inaccurate blood weight.

Summary of the Invention

The purpose of this application is to provide a blood collection device that, through rotation and oscillation, makes the blood bag move more smoothly, reduces the impact of blood bag movement on the weighing results, and improves the efficiency and accuracy of blood collection.

The blood collection device provided in this application adopts the following technical solution:

A blood collection device includes a scale body, a scale pan, and a scale pan rotation control mechanism connected between the scale body and the scale pan;

The scale body is equipped with a display host and a weight acquisition sensor. The scale pan rotation control mechanism is connected to the bottom of the scale body. The weight acquisition sensor is connected to the scale pan rotation control mechanism at the position where it connects to the scale body. The scale pan rotation control mechanism includes a drive component and a transmission component connected to the drive component. The drive component is connected to the scale body, and the transmission component extends downward from the bottom side of the scale body. The scale pan is connected to the lower end of the transmission component. The drive component drives the transmission component to rotate clockwise or counterclockwise, causing the scale pan and the blood bag on the scale pan to rotate clockwise or counterclockwise.

As a preferred technical solution of this application, the scale body is provided with an installation space inside. The scale body includes a fixed part for placing on the working plane and a suspended part extending outward from the working plane. The display host is installed on the fixed part, and the weight acquisition sensor is installed in the suspended part.

As a preferred technical solution of this application, the bottom plate of the suspended part is set as a flat plate with a mounting hole in the center of the bottom plate. The drive component is installed in the suspended part, and the upper part of the transmission component extends into the suspended part through the mounting hole and is connected to the weight acquisition sensor.

As a preferred technical solution of this application, the transmission assembly includes a rotating wheel connected to the drive assembly, an output cylinder coaxially connected to the rotating wheel, and a connecting frame connected to the lower end of the output cylinder. The weighing pan is connected to the connecting frame, and the rotating wheel and the output cylinder are provided with vertically penetrating blood transfusion channels.

As a preferred technical solution of this application, the weight acquisition sensor is configured as an annular structure coaxial with the mounting hole and located below the rotating wheel. A load-bearing wheel is provided between the weight acquisition sensor and the rotating wheel. The load-bearing wheel is connected to the output cylinder. The load-bearing wheel and the weight acquisition sensor are connected through a force-bearing contact component. A limit sleeve is provided on the outer ring of the weight acquisition sensor. The load-bearing wheel and the limit sleeve are rotatably connected.

As a preferred technical solution of this application, the force-bearing contact component is configured as a plurality of balls evenly distributed on the lower surface of the load-bearing wheel, and the upper side of the weight acquisition sensor is provided with a ball track corresponding to the balls.

As a preferred technical solution of this application, the force-bearing contact component includes an upper magnetic track and a lower magnetic track arranged opposite to each other. The upper magnetic track is arranged in a ring on the lower surface of the load-bearing wheel, and the lower magnetic track is arranged in a ring on the upper surface of the weight acquisition sensor.

As a preferred technical solution of this application, the outer circumferential surface of the rotating wheel is provided with a ring of gear teeth in the circumferential direction, and the driving component includes a first driving motor and a first sector gear connected to the output shaft of the first driving motor, the first sector gear being meshed with the rotating wheel.

As a preferred technical solution of this application, the drive assembly further includes a second drive motor and a second sector gear connected to the output shaft of the second drive motor. The second sector gear meshes with the rotating wheel. The rotation directions of the first sector gear and the second sector gear are opposite, and the first sector gear and the second sector gear do not mesh with the rotating wheel at the same time. There is a time interval between the meshing period of the first sector gear and the rotating wheel and the meshing period of the second sector gear and the rotating wheel.

As a preferred technical solution of this application, the display host includes a display screen and a counterweight host, and the counterweight host is electrically connected to the weight acquisition sensor.

In summary, this application includes at least one of the following beneficial technical effects:

1. The blood collection device in this application uses a horizontally rotating weighing pan to place the blood bag, which can both achieve stable shaking of the blood bag and more accurate weighing of the blood bag, thereby improving the safety and accuracy of blood collection.

2. In this application, the method of horizontally rotating the blood bag is used instead of the previous method of swinging the blood bag left and right. This can effectively prevent the blood bag from slipping during the swinging of the weighing pan and improve the safety and stability of the blood collection process.

3. In this application, the tray is mounted on a transmission assembly. The transmission assembly is driven to rotate by two sector gears via a rotating wheel. The two sector gears rotate in opposite directions and there is a time interval between them and the rotating wheel. The rotating wheel first meshes with one sector gear, which controls the transmission assembly and the weighing pan to rotate forward, causing the blood bag on the weighing pan to rotate forward as well. After a period of time, the rotating wheel meshes with the other sector gear, which controls the transmission assembly and the weighing pan to rotate in reverse, causing the blood bag on the weighing pan to rotate in reverse as well. The blood in the blood bag flows under the centrifugal force of continuous forward and reverse rotation, and is fully mixed with the anticoagulant to prevent blood coagulation.

4. In this application, the weight acquisition sensor is arranged in a ring shape, and the transmission component applies gravity to the weight acquisition sensor through the load-bearing wheel, so that the weight acquisition sensor can measure the weight of the blood in the blood bag according to the change of force. Furthermore, the weight acquisition sensor and the load-bearing wheel are connected by a sliding connection, so that the transmission component can rotate smoothly and reduce the influence on the weighing results.

Attached Figure Description

Figure 1 is a schematic diagram of the external structure of the device according to Embodiment 1 of this application;

Figure 2 is a schematic diagram of the internal structure of the scale body in Embodiment 1 of this application;

Figure 3 is a schematic diagram of the weighing pan rotation control mechanism in Embodiment 1 of this application;

Figure 4 is a schematic diagram of the connection between the transmission component and the drive component in Embodiment 1 of this application;

Figure 5 is a schematic diagram of the connection structure between the transmission component and the scale body in Embodiment 1 of this application;

Figure 6 is a schematic diagram of the connection structure between the transmission component and the scale body in Embodiment 2 of this application;

In the diagram, 1. Scale body; 11. Fixed part; 12. Suspended part; 13. Mounting hole; 2. Scale pan; 3. Installation space; 4. Display host; 41. Display screen; 42. Counterweight host; 5. Weight acquisition sensor; 51. Limiting sleeve; 6. Drive assembly; 61. First drive motor; 62. First sector gear; 63. Second drive motor; 64. Second sector gear; 7. Transmission assembly; 71. Rotating wheel; 72. Output cylinder; 73. Connecting frame; 74. Transfusion tube channel; 75. Load-bearing wheel; 76. Ball bearing; 77. Upper magnetic track; 78. Lower magnetic track.

Detailed Implementation

The present application will be further described in detail below with reference to Figures 1-6.

Example 1: This application proposes a blood collection device. Referring to Figures 1 and 2, the device includes a scale body 1, a scale pan 2, a scale pan rotation control mechanism, a display host 4, and a weight acquisition sensor 5. The scale body 1 is a shell structure with an internal installation space 3. The scale body 1 includes a fixed part 11 and a suspended part 12. The fixed part 11 is placed on a working surface and can be fixed to the working surface. The suspended part 12 extends outward from the working surface and is suspended, used to install the scale pan 2 and the scale pan rotation control mechanism.

The display host 4 includes a display screen 41 and a counterweight host 42. The display screen 41 is installed on the housing of the fixing part 11 of the scale body 1 and is used to display the information of the collected blood. The counterweight host 42 is installed in the installation space 3 inside the housing of the fixing part 11. The counterweight host 42 carries its own counterweight to prevent the entire device from tipping over to the bottom of the working surface. The counterweight host 42 is electrically connected to the display screen 41 and the weight acquisition sensor 5 respectively, receives and processes the weight information collected by the weight acquisition sensor 5, and displays it on the display screen 41.

The weight acquisition sensor 5 is installed inside the suspended part 12. The bottom plate of the suspended part 12 is a flat plate with a mounting hole 13 in the center. In this embodiment, the weight acquisition sensor 5 is set as a ring structure coaxial with the mounting hole 13 and is fixedly installed on the bottom plate of the suspended part 12.

The weighing pan rotation control mechanism includes a drive assembly 6 and a transmission assembly 7. The drive assembly 6 is connected to the transmission assembly 7 and serves as a power source to drive the transmission assembly 7 to move and output power outward. In this embodiment, the drive assembly 6 is installed inside the suspended part 12 and is located outside the weight acquisition sensor 5. The upper part of the transmission assembly 7 extends into the suspended part 12 through the mounting hole 13 and is connected to both the weight acquisition sensor 5 and the drive assembly 6. The lower part of the transmission assembly 7 extends downward from inside the suspended part 12, and the weighing pan 2 is connected to the lowest end of the transmission assembly 7.

Referring to Figures 3, 4, and 5, the drive assembly 6 includes a first drive motor 61, a first sector gear 62, a second drive motor 63, and a second sector gear 64. The first drive motor 61 is installed inside the suspended part 12, and the first sector gear 62 is connected to the output shaft of the first drive motor 61. The central angle of the first sector gear 62 is less than 90°. The second drive motor 63 is also installed inside the suspended part 12, and the second sector gear 64 is connected to the output shaft of the second drive motor 63. The first drive motor 61 and the second drive motor 63 are symmetrically arranged on the left and right sides of the weight acquisition sensor 5 in the horizontal direction. The structure of the second sector gear 64 is the same as that of the first sector gear 62.

The transmission assembly 7 includes a rotating wheel 71, an output cylinder 72, a connecting frame 73, a load-bearing wheel 75, and a force-bearing contact assembly. In this embodiment, the rotating wheel 71 is configured as a gear and has a central hole. The rotating wheel 71 is located directly above the weight acquisition sensor 5. The output cylinder 72 is coaxially fixed on the lower surface of the rotating wheel 71. The output cylinder 72 passes through the mounting hole 13, and its upper end is located in the mounting space 3. The central hole of the rotating wheel 71 and the inner hole of the output cylinder 72 form a vertically penetrating transfusion blood channel 74. The connecting frame 73 includes four downwardly inclined connecting rods, which are fixed on the outer wall of the lower end of the output cylinder 72. The weighing pan 2 is connected to the lower ends of the four connecting rods. When drawing blood, the blood bag is placed in the weighing pan 2, and the transfusion blood tube passes upward through the transfusion blood channel 74 and exits from the weighing body 1.

Referring to Figures 4 and 5, in this embodiment, the first sector gear 62 and the second sector gear 64 rotate in opposite directions and both mesh with the rotating wheel 71. The two sector gears do not mesh with the rotating wheel 71 simultaneously, and there is a time interval between the meshing period of the first sector gear 62 and the rotating wheel 71 and the meshing period of the second sector gear 64 and the rotating wheel 71. That is, the first sector gear 62 first rotates to the state of meshing with the rotating wheel 71, driving the rotating wheel 71 to rotate clockwise or counterclockwise. Then, the first sector gear 62 disengages from the rotating wheel 71, and then the second sector gear 64 rotates to the state of meshing with the rotating wheel 71, driving the rotating wheel 71 to rotate in the opposite direction. During this process, the weighing pan 2 and the blood bag rotate together. In this embodiment, the rotational speed of the first sector gear 62 and the second sector gear 64 can be set to 0.5 r/s.

In this embodiment, a load-bearing wheel 75 is provided between the weight acquisition sensor 5 and the rotating wheel 71. The load-bearing wheel 75 is disc-shaped and is fixedly sleeved on the upper part of the output cylinder 72. The load-bearing wheel 75 and the weight acquisition sensor 5 are connected by a force-bearing contact component. In this embodiment, the force-bearing contact component is configured as a ring of balls 76 evenly installed on the lower surface of the load-bearing wheel 75. The upper side of the weight acquisition sensor 5 is provided with a ball bearing slide corresponding to the balls 76. The entire transmission component 7 is rotatably mounted on the weight acquisition sensor 5 and the scale body 1 via the balls 76.

To prevent the transmission assembly 7 from shifting, in this embodiment a limiting sleeve 51 is coaxially provided on the outer ring of the weight acquisition sensor 5. The outer ring of the load-bearing wheel 75 contacts the inner wall of the limiting sleeve 51, and the two are rotatably connected. The limiting sleeve 51 can prevent the transmission assembly 7 from shifting during rotation, thereby maintaining the stable operation of the entire device.

The implementation principle of Embodiment 1 of this application is as follows: During blood collection, the blood bag is placed on the weighing pan 2, and the transfusion tube is led out through the transfusion tube channel 74 and guided into the blood donor's body. At the same time as blood is drawn, the first drive motor 61 and the second drive motor 63 are started, driving the first sector gear 62 and the second sector gear 64 to rotate, which in turn drives the transmission component 7 to swing in both directions around the central axis, thereby driving the weighing pan 2 and the blood bag to perform a centrifugal rotation of less than one revolution, so as to prevent the blood from clotting.

Example 2: Referring to Figure 6, the difference between this example and Example 1 lies in the structure of the force contact component. In this example, the force contact component includes an upper magnetic track 77 and a lower magnetic track 78 arranged opposite each other. The upper magnetic track 77 is composed of multiple magnetic blocks arranged in a ring on the lower surface of the load-bearing wheel 75. The lower magnetic track 78 is also composed of multiple magnetic blocks arranged in a ring on the upper surface of the weight acquisition sensor 5. By utilizing the principle of magnetic levitation, the load-bearing wheel 75 can exert a downward force on the weight acquisition sensor 5 without hindering the relative rotation between the load-bearing wheel 75 and the weight acquisition sensor 5.

The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims (5)

A blood collection device, characterized in that it includes a weighing body (1), a weighing pan (2), and a weighing pan rotation control mechanism connected between the weighing body (1) and the weighing pan (2); The scale body (1) is equipped with a display host (4) and a weight acquisition sensor (5). The scale pan rotation control mechanism is connected to the bottom of the scale body (1). The weight acquisition sensor (5) is connected to the scale pan rotation control mechanism at the position connected to the scale body (1). The scale pan rotation control mechanism includes a drive component (6) and a transmission component (7) connected to the drive component (6). The drive component (6) is connected to the scale body (1). The transmission component (7) extends downward from the bottom side of the scale body (1). The scale pan (2) is connected to the lower end of the transmission component (7). The drive component (6) drives the transmission component (7) to rotate clockwise or counterclockwise, thereby causing the scale pan (2) and the blood bag on the scale pan (2) to rotate clockwise or counterclockwise. The scale body (1) has an installation space (3) inside. The scale body (1) includes a fixed part (11) for placing on the working plane and a suspended part (12) extending outward from the working plane. The display host (4) is installed on the fixed part (11), and the weight acquisition sensor (5) is installed in the suspended part (12). The bottom plate of the suspended part (12) is set as a flat plate, and the center of the bottom plate has an installation hole (13). The drive assembly (6) is installed in the suspended part (12), and the upper part of the transmission assembly (7) passes through the installation hole (13) and extends into the suspended part (12) and is connected to the weight acquisition sensor (5). The transmission assembly (7) includes a rotating wheel (71) connected to the drive assembly (6), an output cylinder (72) coaxially connected to the rotating wheel (71), and a connecting frame (73) connected to the lower end of the output cylinder (72). The weighing pan (2) is connected to the connecting frame (73). The rotating wheel (71) and the output cylinder (72) are provided with a vertically penetrating blood transfusion channel (74). The outer circumferential surface of the rotating wheel (71) is provided with a ring of teeth. The drive assembly (6) includes a first drive motor (61), a first sector gear (62) connected to the output shaft of the first drive motor (61), a second drive motor (63), and a second sector gear (64) connected to the output shaft of the second drive motor (63). The first sector gear (62) meshes with the rotating wheel (71), and the second sector gear (64) meshes with the rotating wheel (71). The rotation directions of the first sector gear (62) and the second sector gear (64) are opposite, and the first sector gear (62) and the second sector gear (64) do not mesh with the rotating wheel (71) at the same time. There is a time interval between the meshing period of the first sector gear (62) and the rotating wheel (71) and the meshing period of the second sector gear (64) and the rotating wheel (71). According to claim 1, a blood collection device is characterized in that the weight acquisition sensor (5) is configured as an annular structure coaxial with the mounting hole (13) and located below the rotating wheel (71), a load-bearing wheel (75) is provided between the weight acquisition sensor (5) and the rotating wheel (71), the load-bearing wheel (75) is connected to the output cylinder (72), the load-bearing wheel (75) and the weight acquisition sensor (5) are connected by a force-bearing contact component, a limit sleeve (51) is provided on the outer ring of the weight acquisition sensor (5), and the load-bearing wheel (75) and the limit sleeve (51) are rotatably connected. According to claim 2, a blood collection device is characterized in that the force-bearing contact component is configured as a plurality of balls (76) evenly distributed on the lower surface of the load-bearing wheel (75), and the upper side of the weight acquisition sensor (5) is provided with a ball track corresponding to the balls (76). According to claim 2, a blood collection device is characterized in that the force-bearing contact component includes an upper magnetic track (77) and a lower magnetic track (78) arranged opposite to each other, the upper magnetic track (77) is arranged in a ring on the lower surface of the load-bearing wheel (75), and the lower magnetic track (78) is arranged in a ring on the upper surface of the weight acquisition sensor (5). According to claim 1, a blood collection device is characterized in that the display host (4) includes a display screen (41) and a counterweight host (42), and the counterweight host (42) is electrically connected to the weight acquisition sensor (5).