A fixing mechanism and a blood component separator

Abstract

The utility model discloses a fixing mechanism and blood component separator. The fixing mechanism of the utility model includes fixed frame, moving plate, hangs the component and drive assembly. The moving plate is movably connected in the fixed frame, and one side of moving plate is provided with extrusion surface away from the fixed frame. The hanging component is connected to the fixed frame, and the hanging component is at least partially protruding from the extrusion surface, and the hanging component is used for hanging the blood bag, and the extrusion surface is used for abutting against the blood bag. The drive assembly is connected to the moving plate, and the drive assembly is used for driving the moving plate to move relative to the fixed frame, so that the blood bag is separated from the extrusion surface. By adding a movable moving plate on the side of the fixed frame close to the blood bag and driving the moving plate to move by the drive assembly, the extrusion surface and the blood bag will be adhered after the blood bag is extruded. At this time, the drive assembly drives the moving plate to move, so that the extrusion surface and the blood bag move relatively, which can make the blood bag separate from the extrusion surface, that is, the adhesion phenomenon of the blood bag is reduced.

Description

Technical Field

[0001] This utility model relates to the field of blood component separation technology, specifically to a fixing mechanism and a blood component separator. Background Technology

[0002] In the field of blood component separation technology, the components within a centrifuged blood bag are separated by squeezing the bag. The weight is then measured after squeezing to ensure the desired separation effect. In related technologies, the squeezing device consists of a fixed plate and a squeezing plate that can move relative to it. However, after the squeezing plate squeezes the blood bag suspended between the fixed plate and the squeezing plate, the fixed plate may stick to the blood bag, affecting the accuracy of the weight measurement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fixing mechanism that can reduce the adhesion of blood bags.

[0004] This utility model also proposes a blood component separator having the above-mentioned fixing mechanism.

[0005] A fixing mechanism according to a first aspect of the present invention includes a fixing frame, a movable plate, a mounting assembly, and a driving assembly. The movable plate is movably connected to the fixing frame, and a compression surface is provided on the side of the movable plate facing away from the fixing frame. The mounting assembly is connected to the fixing frame, and at least partially protrudes from the compression surface. The mounting assembly is used to hang a blood bag, and the compression surface is used to abut against the blood bag. The driving assembly is connected to the movable plate, and the driving assembly is used to drive the movable plate to move relative to the fixing frame, so that the blood bag disengages from the compression surface.

[0006] The fixing mechanism according to the present utility model has at least the following beneficial effects: by adding a movable moving plate to the side of the fixing frame that is close to the blood bag and driving the driving component to move it, the blood bag will stick together after the squeezing surface and the blood bag are squeezed. At this time, the driving component drives the moving plate to move so that the squeezing surface and the blood bag move relative to each other, which can promote the blood bag to detach from the squeezing surface, that is, reduce the sticking phenomenon of the blood bag.

[0007] According to some embodiments of the present invention, one of the movable plate and the fixed frame is provided with a guide groove along the moving direction of the movable plate, and the other is provided with a guide member, which is slidably disposed in the guide groove.

[0008] According to some embodiments of this utility model, the movable plate can switch between a first position and a second position relative to the fixed frame. In the first position, the squeezing surface is used to abut against the blood bag. The driving assembly is used to drive the movable plate to move from the first position to the second position. The fixing mechanism further includes a reset member connected to the movable plate and the fixed frame. The reset member is used to drive the movable plate to move from the second position to the first position, and / or the driving assembly is used to drive the movable plate to reciprocate between the first position and the second position.

[0009] According to some embodiments of the present invention, the driving assembly includes a driving member, a gear, and a rack. The driving member is disposed on the fixed frame, and the power end of the driving member is connected to the central shaft of the gear. The gear meshes with the rack, and the rack is disposed vertically on the movable plate. The movable plate is movably connected to the fixed frame. The driving member is used to drive the gear to rotate so that the rack drives the movable plate to move vertically relative to the fixed frame.

[0010] According to some embodiments of this utility model, the mounting assembly includes a mounting base and a hanging pin connected to the mounting base. The mounting base is connected to the fixing frame. The hanging pin protrudes from the compression surface away from the fixing frame along the normal direction of the compression surface. The hanging pin is used to hang the blood bag. The hanging pin is positioned above the moving plate, or the moving plate has a corresponding clearance notch through which the hanging pin passes.

[0011] According to some embodiments of the present invention, the mounting assembly further includes an elastic element connected between the hanging pin and the mounting base. The elastic element is used to apply an elastic force to the hanging pin along the normal direction of the extrusion surface toward the side away from the fixing frame.

[0012] According to some embodiments of the present invention, the mounting component includes a weighing sensor connected to the hanging needle, and the weighing sensor is used to detect the weight of the blood bag hanging on the hanging needle.

[0013] According to some embodiments of the present invention, the movable plate is provided with a first light-transmitting area, and the fixed frame is provided with a second light-transmitting area. The second light-transmitting area is arranged opposite to the first light-transmitting area along the normal direction of the extrusion surface, so that the side of the blood bag facing the extrusion surface can be exposed through the first light-transmitting area and the second light-transmitting area.

[0014] According to some embodiments of this utility model, a portion or all of the movable plate is made of a transparent material to form the first light-transmitting area. The fixing frame has a through opening to form the second light-transmitting area; alternatively, the fixing frame includes a fixing plate, and the movable plate is movably connected to the fixing plate, wherein a portion or all of the fixing plate is made of a transparent material to form the second light-transmitting area.

[0015] A blood component separator according to a second aspect embodiment of the present invention includes a fixing mechanism as described in any one of the first aspect embodiments, a main unit housing, and a squeezing plate. The fixing frame is fixedly disposed on the outside of the main unit housing along a first direction, and the movable plate is located between the fixing frame and the main unit housing. The squeezing plate is located on the side of the movable plate opposite to the fixing frame, and the squeezing plate is movably connected to the main unit housing along the first direction. The squeezing plate is used to squeeze the blood bag suspended on the mounting assembly toward the squeezing surface.

[0016] The blood component separator according to the present invention has at least the following beneficial effects: the fixing mechanism adds a movable moving plate to the side of the fixing frame that is close to the blood bag and drives the moving plate to move. After the blood bag is squeezed by the squeezing plate and the movable squeezing plate, the squeezing surface and the blood bag will stick together. At this time, the squeezing plate can actively detach from the blood bag by moving, and the driving component drives the moving plate to move so that the squeezing surface and the blood bag move relative to each other. This can promote the blood bag to detach from the squeezing surface, that is, reduce the sticking phenomenon of the blood bag.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a partial three-dimensional view of a blood component separator according to one embodiment of the present invention;

[0020] Figure 2 This is an exploded view of the fixing mechanism in one embodiment of the present invention;

[0021] Figure 3 This is a side view of the fixing mechanism and the extrusion plate in one embodiment of the present invention.

[0022] Reference numerals: Blood component separator 100, fixing mechanism 101, main unit box 102, squeezing plate 103, blood bag 104, fixing frame 201, moving plate 202, mounting assembly 203, driving assembly 204, driving component 205, gear 206, rack 207, mounting base 208, hanging needle 209, elastic element 210, guide groove 211, guide element 212, weighing sensor 213, first light-transmitting area 214, second light-transmitting area 215, fixing plate 216, avoidance notch 217. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0027] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] In the field of blood component separation technology, the components within a blood bag 104 are separated after centrifugation and stratification by squeezing the bag. Weight is measured after squeezing to ensure the desired separation effect is achieved. In related technologies, the squeezing device consists of a fixed plate 216 and a squeezing plate 103 that can move relative to it. After the squeezing plate 103 squeezes the blood bag 104, the fixed plate 216 may stick to the blood bag 104, affecting the accuracy of weight measurement. This invention proposes a fixing mechanism 101 that can reduce the sticking phenomenon in the blood bag 104.

[0029] refer to Figure 2 and Figure 3 According to a first aspect embodiment of the present invention, the fixing mechanism 101 includes a fixing frame 201, a movable plate 202, a mounting assembly 203, and a driving assembly 204. The movable plate 202 is movably connected to the fixing frame 201, and a compression surface is provided on the side of the movable plate 202 facing away from the fixing frame 201. The mounting assembly 203 is connected to the fixing frame 201, and at least partially protrudes from the compression surface. The mounting assembly 203 is used to hang the blood bag 104, and the compression surface is used to abut against the blood bag 104. The driving assembly 204 is connected to the movable plate 202, and the driving assembly 204 is used to drive the movable plate 202 to move relative to the fixing frame 201, so that the blood bag 104 is disengaged from the compression surface. By adding a movable moving plate 202 to the side of the fixed frame 201 that is close to the blood bag 104 and driving it to move by the drive component 204, the blood bag 104 will stick together after being squeezed. At this time, the drive component 204 drives the moving plate 202 to move, so that the squeezing surface and the blood bag 104 move relative to each other. This can help the blood bag 104 to detach from the squeezing surface, thus reducing the sticking phenomenon of the blood bag 104.

[0030] refer to Figure 2 and Figure 3 In some embodiments of this utility model, one of the movable plate 202 and the fixing frame 201 is provided with a guide groove 211 along the moving direction of the movable plate 202, and the other is provided with a guide member 212, which is slidably disposed within the guide groove 211. The guide groove 211 and the guide member 212 allow the movable plate 202 to move more accurately along a preset desired path, improving the stability of the movable plate 202's movement, and facilitating the observation and adjustment of the movement frequency and amplitude of the movable plate 202, thus improving the anti-sticking effect of the movable plate 202. Specifically, in some embodiments of this utility model, the guide groove 211 can be installed on... Figure 2Guide members 212 are mounted on both sides of the movable plate 202 shown, and on both sides of the fixed frame 201; similarly, guide grooves 211 can be mounted on the fixed frame 201 and guide members 212 can be mounted on the movable plate 202. In some embodiments, the guide member 212 can specifically be as follows: Figure 2 The guide wheel is designed to reduce friction between the guide component 212 and the inner wall of the guide groove 211, thereby improving its service life. Alternatively, it can be designed as a block or a strip, which can enable it to move along a fixed trajectory within the guide groove 211.

[0031] refer to Figure 2 and Figure 3 In some embodiments of this utility model, the movable plate 202 can switch between a first position and a second position by moving relative to the fixed frame 201. In the first position, the squeezing surface is used to abut against the blood bag 104; the driving assembly 204 is used to drive the movable plate 202 to move from the first position to the second position. The fixing mechanism 101 also includes a reset member, which is connected to the movable plate 202 and the fixed frame 201. The reset member is used to drive the movable plate 202 to move from the second position to the first position, and / or, the driving assembly 204 is used to drive the movable plate 202 to reciprocate between the first position and the second position. The reset member (not shown in the figure) can reduce the driving time of the driving assembly 204 and reduce energy consumption, while the first position mentioned above is... Figure 3 In the initial position shown, the compression plate 103 and the moving plate 202 jointly compress the blood bag 104. After compression, the drive assembly 204 drives the moving plate 202 to move upward or downward to reach the second position, causing the moving plate 202 to swing up and down to detach from the blood bag 104. Specifically, the reset component can be a spring or other elastic component connecting the moving plate 202 and the fixing frame 201. When the moving plate 202 detaches from the initial position, the spring deforms, and the rebound force drives the moving plate 202 to reset. In some embodiments, the reset component may not be provided, reducing the number of parts and complexity, and the drive assembly 204 can be used directly to drive the moving plate 202 to reciprocate.

[0032] It should be noted that in some embodiments, the moving plate 202 can be actively or passively reset, and the squeezing plate 103 can also be actively or passively reset, improving the level of automation. In some embodiments, in addition to reciprocating in the vertical direction, the moving plate 202 can also move back and forth or swing by changing the setting path of the drive component 204 and the guide path of the guide groove 211 and the guide member 212, so as to generate relative movement with the blood bag 104 and thus detach the squeezing surface from the blood bag 104.

[0033] refer to Figure 2In some embodiments of this utility model, the drive assembly 204 includes a drive member 205, a gear 206, and a rack 207. The drive member 205 is mounted on the fixed frame 201. The power end of the drive member 205 is connected to the central shaft of the gear 206. The gear 206 meshes with the rack 207. The rack 207 is vertically mounted on the movable plate 202. The movable plate 202 is movably connected to the fixed frame 201. The drive member 205 drives the gear 206 to rotate, so that the rack 207 drives the movable plate 202 to move vertically relative to the fixed frame 201. When the drive member 205 is a motor, the gear 206 and rack 207 transmission can directly convert the rotational motion of the power end of the drive member 205 into linear motion, without the need for intermediate mechanisms. This results in a simple and efficient structure, a large meshing contact area, low friction loss, and high transmission efficiency. The meshing structure of gear 206 and rack 207 can also disperse impact loads, has high meshing accuracy, is suitable for rapid reciprocating motion, and is compatible with the usage scenario of the fixing mechanism 101 in this utility model embodiment, that is, to drive the moving plate 202 to reciprocate.

[0034] It should be noted that in some embodiments, the drive assembly 204 may have its power end set on the moving plate 202, while the passive structure such as the rack 207 may be set on the fixed frame 201. Furthermore, the drive assembly 204 may be configured as a sprocket and chain structure, or a lead screw lifting structure or other transmission mechanism.

[0035] refer to Figure 2 and Figure 3 In some embodiments of this utility model, the mounting component 203 includes a mounting base 208 and a hanging pin 209 connected to the mounting base 208. The mounting base 208 is connected to the fixing frame 201. The hanging pin 209 protrudes from the compression surface along the normal direction of the compression surface, away from the fixing frame 201. The hanging pin 209 is used to hang the blood bag 104. The hanging pin 209 is positioned above the moving plate 202, or the moving plate 202 is provided with a corresponding clearance notch 217, through which the hanging pin 209 passes. The hanging pin 209 protruding from the compression surface makes it easier to place the blood bag 104, thereby facilitating the compression of the blood bag 104 by the compression plate 103 and the moving plate 202. The mounting base 208 is provided to facilitate the repair and replacement of the hanging pin 209, and also allows adjustment of the position and number of the hanging pins 209. The notch 217 on the movable plate 202 effectively prevents interference between the movable plate 202 and the hanging pin 209 during reciprocating motion. Specifically, the opening direction of the notch 217 is determined by the movement path of the movable plate 202. For example, in some embodiments of this utility model, refer to... Figure 2The movable plate 202 reciprocates in the vertical direction, and the clearance notch 217 is set below the hanging pin 209 with the opening facing upward. In this way, the movable plate 202 will not touch the hanging pin 209 when it moves up and down. In some embodiments, if the movable plate 202 reciprocates in the horizontal direction, the opening of the clearance notch 217 is set in the horizontal direction to match the path of the movable plate 202.

[0036] refer to Figure 2 In some embodiments of this utility model, the mounting assembly 203 further includes an elastic element 210, which is connected between the mounting base 208 and the pin 209. The elastic element 210 applies an elastic force to the pin 209 along the normal direction of the compression surface towards the side away from the fixing frame 201. During the actual compression of the blood bag 104, the pin 209 is compressed together with the blood bag 104 to achieve the maximum degree of compression. After compression, the rebound force of the elastic element 210 can effectively push the pin 209 away from the fixing frame 201 to return to its initial position, facilitating the subsequent removal of the blood bag 104 and the placement of new blood bags 104. Specifically, in some embodiments, the elastic element 210 can be a spring, elastic strip, or other similar components.

[0037] refer to Figure 2 In some embodiments of this invention, the mounting component 203 includes a weighing sensor 213 connected to the hanging needle 209. The weighing sensor 213 is used to detect the weight of the blood bag 104 hanging on the hanging needle 209. During the process of squeezing the blood bag 104 to separate blood components, the weight change of the blood inside the blood bag 104 can be monitored in real time by weighing, thereby judging the progress and effect of the squeezing. For example, after squeezing the blood bag 104 to separate plasma and red blood cells, by observing the weight change, it can be determined whether the plasma and red blood cells have been effectively separated.

[0038] refer to Figure 2 and Figure 3 In some embodiments of this utility model, the movable plate 202 is provided with a first light-transmitting area 214, and the fixed frame 201 is provided with a second light-transmitting area 215. The second light-transmitting area 215 is arranged opposite to the first light-transmitting area 214 along the normal direction of the extrusion surface, so that the side of the blood bag 104 facing the extrusion surface can be exposed through the first light-transmitting area 214 and the second light-transmitting area 215. Specifically, as shown in... Figure 3 As shown, the movable plate 202 and the fixed frame 201 are respectively provided with a first light-transmitting area 214 and a second light-transmitting area 215, which allows the front side of the blood bag 104 to be exposed. Therefore, information codes can be affixed to the corresponding positions of the blood bag 104, and users can use a barcode scanner to scan the blood bag 104 from the front end of the fixed frame 201, that is, the side away from the movable plate 202. This is more convenient to use, and the setting of the movable plate 202 does not affect the reading of the information of the blood bag 104.

[0039] In some embodiments, the extrusion plate 103 may be configured as a light-transmitting element, so that a barcode scanner can be used to scan and read the barcode from the side of the extrusion plate 103 away from the blood bag 104.

[0040] refer to Figure 2 In some embodiments of this utility model, a portion or all of the movable plate 202 is made of transparent material to form a first light-transmitting area 214. The fixing frame 201 has a through opening to form a second light-transmitting area 215. Alternatively, the fixing frame 201 includes a fixing plate 216, and the movable plate 202 is movably connected to the fixing plate 216, with a portion or all of the fixing plate 216 made of transparent material to form the second light-transmitting area 215. In related technologies, there is no movable plate 202, and the fixing frame 201 itself contains the fixing plate 216; therefore, it is convenient to directly make a portion or all of the fixing plate 216 into the second light-transmitting area 215 using transparent material. Specifically, the first light-transmitting area 214 and the second light-transmitting area 215 can be made of materials such as transparent glass or acrylic sheet.

[0041] refer to Figure 1 According to a second aspect embodiment of the present invention, a blood component separator 100 includes a fixing mechanism 101 as described in any of the first aspect embodiments, a main unit housing 102, and a squeezing plate 103. A fixing frame 201 is fixedly disposed on the outside of the main unit housing 102 along a first direction, and a movable plate 202 is located between the fixing frame 201 and the main unit housing 102. The squeezing plate 103 is located on the side of the movable plate 202 opposite to the fixing frame 201, and is movably connected to the main unit housing 102 along the first direction. The squeezing plate 103 squeezes the blood bag 104, which is hung on the mounting assembly 203, towards the squeezing surface. The fixing mechanism 101 adds a movable moving plate 202 to the side of the fixing frame 201 near the blood bag 104 and drives it to move by the driving component 204. After the blood bag 104 is squeezed by the moving plate 202 and the movable squeezing plate 103, the squeezing surface and the blood bag 104 may stick together. At this time, the squeezing plate 103 can actively detach from the blood bag 104 by moving. The driving component 204 drives the moving plate 202 to move, so that the squeezing surface and the blood bag 104 move relative to each other. This can promote the blood bag 104 to detach from the squeezing surface, that is, reduce the sticking phenomenon of the blood bag 104.

[0042] It should be noted that, Figure 1The main unit 102 shown is only a partial structure, intended to highlight key points and reduce the complexity of the drawings. In some embodiments of this utility model, the general operating procedure of the blood component separator 100 is as follows: The blood bag 104 is hung on the hanging needle 209, positioning it between the squeezing plate 103 and the moving plate 202. The squeezing plate 103 moves towards the moving plate 202 and squeezes the blood bag 104. After squeezing, the squeezing plate 103 moves backward, and the elastic element 210 drives the hanging needle 209 to reset with the blood bag 104. Meanwhile, the drive assembly 204 drives the moving plate 202 to reciprocate, thereby detaching it from the blood bag 104. During this process, the weighing sensor 213 detects and records the weight change of the blood bag 104.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A fixing mechanism, characterized in that, include: Fixture; A movable plate, which is movably connected to the fixed frame, has an extrusion surface on the side of the movable plate facing away from the fixed frame; A mounting assembly is connected to the fixing frame. The mounting assembly at least partially protrudes from the compression surface. The mounting assembly is used to hang blood bags, and the compression surface is used to abut against the blood bags. A drive assembly connected to the movable plate, the drive assembly being used to drive the movable plate to move relative to the fixed frame, so as to disengage the blood bag from the squeezing surface.

2. The fixing mechanism according to claim 1, characterized in that, One of the movable plate and the fixed frame is provided with a guide groove along the moving direction of the movable plate, and the other is provided with a guide member, which is slidably disposed in the guide groove.

3. The fixing mechanism according to claim 2, characterized in that, The movable plate can switch between a first position and a second position relative to the fixed frame. In the first position, the squeezing surface is used to abut against the blood bag. The driving component is used to drive the movable plate to move from the first position to the second position. The fixing mechanism further includes a reset member, which is connected to the movable plate and the fixing frame. The reset member is used to drive the movable plate to move from the second position to the first position. And / or, the drive component is used to drive the movable plate to reciprocate between the first position and the second position.

4. The fixing mechanism according to claim 1, characterized in that, The drive assembly includes a drive element, a gear, and a rack. The drive element is disposed on the fixed frame. The power end of the drive element is connected to the central shaft of the gear. The gear meshes with the rack. The rack is disposed vertically on the movable plate. The movable plate is movably connected to the fixed frame. The drive element is used to drive the gear to rotate so that the rack drives the movable plate to move vertically relative to the fixed frame.

5. The fixing mechanism according to claim 1, characterized in that, The mounting assembly includes a mounting base and a hanging pin connected to the mounting base. The mounting base is connected to the fixing frame. The hanging pin protrudes from the squeezing surface away from the fixing frame along the normal direction of the squeezing surface. The hanging pin is used to hang the blood bag. The hanging pin is positioned above the movable plate, or the movable plate has a corresponding clearance notch through which the hanging pin passes.

6. The fixing mechanism according to claim 5, characterized in that, The mounting assembly also includes an elastic element connected between the hanging pin and the mounting base. The elastic element is used to apply an elastic force to the hanging pin along the normal direction of the extrusion surface toward the side away from the fixing frame.

7. The fixing mechanism according to claim 5, characterized in that, The mounting assembly includes a weighing sensor connected to the hanging needle, and the weighing sensor is used to detect the weight of the blood bag hanging on the hanging needle.

8. The fixing mechanism according to claim 1, characterized in that, The movable plate is provided with a first light-transmitting area, and the fixed frame is provided with a second light-transmitting area. The second light-transmitting area is arranged opposite to the first light-transmitting area along the normal direction of the extrusion surface, so that the side of the blood bag facing the extrusion surface can be exposed through the first light-transmitting area and the second light-transmitting area.

9. The fixing mechanism according to claim 8, characterized in that, The movable plate is partially or entirely made of a transparent material to form the first light-transmitting area; The fixing frame has a through opening to form the second light-transmitting area, or the fixing frame includes a fixing plate, and the movable plate is movably connected to the fixing plate, wherein part or all of the fixing plate is made of transparent material to form the second light-transmitting area.

10. A blood component separator, characterized in that, include: Main unit case; The fixing mechanism according to any one of claims 1 to 9, wherein the fixing frame is fixedly disposed on the outside of the main unit chassis along a first direction, and the movable plate is located between the fixing frame and the main unit chassis; A squeezing plate is located on the side of the movable plate opposite to the fixed frame. The squeezing plate is movably connected to the main unit along the first direction. The squeezing plate is used to squeeze the blood bag hanging on the mounting assembly toward the squeezing surface.

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