Liquid bag squeezing device

Abstract

The utility model provides a kind of liquid bag extrusion device, including base, fixed extrusion plate, movable extrusion plate, pivot, crank link mechanism and drive mechanism, fixed extrusion plate is fixedly installed on base, one end of fixed extrusion plate is hinged to one end of movable extrusion plate by pivot, the included angle space for extruding external liquid bag is formed between fixed extrusion plate and movable extrusion plate, drive mechanism is installed in base, one end of crank link mechanism is connected with movable extrusion plate, the other end of crank link mechanism is connected with drive mechanism, drive mechanism rotates movable extrusion plate around pivot by crank link mechanism driving.The application adopts the included angle space of movable extrusion plate and fixed extrusion plate to extrude maintenance liquid bag, can be more clean to extrude maintenance liquid, reduce residual;The application scheme is simple in structure, low in equipment cost, realizes full-automatic extrusion, is efficient and reliable, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, specifically to a liquid bag squeezing device. Background Technology

[0002] Current blood separation methods involve: using a centrifuge to separate the blood in the mother bag into an upper layer of plasma and a lower layer of red blood cells; then, using a blood component separator's squeeze plate to press the mother bag, forcing the upper plasma layer into a plasma collection bag, thus separating the plasma from the red blood cells; finally, using the same squeeze plate, the preservation solution bag is pressed, transferring the preservation solution to the mother bag to mix with the remaining red blood cells. However, existing squeezing devices suffer from drawbacks such as complex structure, incomplete extraction of the preservation solution, and excessive residual preservation solution in the preservation solution bag. Utility Model Content

[0003] The purpose of this application is to overcome the shortcomings commonly found in the current market as described in the background art above, and to provide a liquid bag squeezing device.

[0004] The present application addresses the above problems through the following technical solutions.

[0005] This embodiment provides a liquid bag squeezing device, including a base, a fixed squeezing plate, a movable squeezing plate, a rotating shaft, a crank-connecting rod mechanism, and a drive mechanism. The fixed squeezing plate is fixedly installed on the base, and one end of the fixed squeezing plate is hinged to one end of the movable squeezing plate through the rotating shaft. An angled space is formed between the fixed squeezing plate and the movable squeezing plate for squeezing an external liquid bag. The drive mechanism is installed on the base, and one end of the crank-connecting rod mechanism is connected to the movable squeezing plate, while the other end of the crank-connecting rod mechanism is connected to the drive mechanism. The drive mechanism drives the movable squeezing plate to rotate around the rotating shaft through the crank-connecting rod mechanism.

[0006] In some embodiments, the end of the movable extrusion plate that is hinged to the fixed extrusion plate is the first hinge end, and the lower edge of the first hinge end is provided with a hinge seat. The movable extrusion plate and the hinge seat are an integral structure.

[0007] In some embodiments, the hinge seat is provided with a first through hole for the rotating shaft to pass through. One end of the rotating shaft is fixedly installed in the first through hole by screws. The end of the fixed extrusion plate that is hinged to the fixed extrusion plate is the second hinge end. The second hinge end is provided with a second through hole for the rotating shaft to pass through. The other end of the rotating shaft is rotatably installed in the second through hole.

[0008] In some embodiments, the crank-connecting rod mechanism includes a sliding rod, a connecting rod, and a crank. One end of the sliding rod is driven to a drive mechanism, which can drive the sliding rod to move linearly back and forth. The other end of the sliding rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to one end of the crank. The other end of the crank is fixedly connected to the hinge seat of the movable pressing plate.

[0009] In some embodiments, the lower edges of both ends of the first hinge end are provided with hinge seats, each hinge seat is provided with a first through hole, the number of rotating shafts is two, the two ends of the second hinge end are provided with second through holes, the crank is roughly "T" shaped, and the upper left and upper right ends of the crank are fixedly connected to the two hinge seats respectively.

[0010] In some embodiments, the drive mechanism includes a motor, a driving pulley, a driven pulley, a belt, a trapezoidal lead screw, a lead screw nut, a sliding rod mounting seat, and a linear guide shaft. The driving pulley is fixedly connected to the output shaft of the motor, and the driven pulley is driven by the belt. The two ends of the trapezoidal lead screw are rotatably mounted on the base. The driven pulley is sleeved on one end of the trapezoidal lead screw, and the lead screw nut is screwed onto the trapezoidal lead screw. The sliding rod mounting seat is sleeved on the outer periphery of the lead screw nut. The two ends of the linear guide shaft are fixedly mounted on the base. The linear guide shaft is parallel to the trapezoidal lead screw, and a linear bearing is slidably sleeved on the linear guide shaft. The sliding rod mounting seat is fixedly connected to the linear bearing, and the sliding rod is fixedly mounted on the sliding rod mounting seat.

[0011] In some embodiments, there are two sets of linear guide shafts, with the trapezoidal lead screw located between the two sets of linear guide shafts.

[0012] In some embodiments, the diameter of the driving pulley is smaller than the diameter of the driven pulley.

[0013] In some embodiments, a silicone pad is provided on the side of the fixed extrusion plate facing the movable extrusion plate.

[0014] In some embodiments, a support plate and a motor mounting plate are installed on the base. A fixed pressing plate is fixedly installed on the base via the support plate. The motor is fixedly installed on the base via the motor mounting plate. The sliding rod is hinged to the connecting rod via a hinge pin. The connecting rod is hinged to the crank via a hinge pin. The two ends of the trapezoidal lead screw are rotatably installed on the base via bearings.

[0015] The beneficial effects of this application are: the use of the angled space formed by the movable extrusion plate and the fixed extrusion plate to extrude the maintenance liquid bag can make the maintenance liquid more clean and reduce residue; the solution of this application has a simple structure, low equipment cost, realizes fully automatic extrusion, is highly efficient and reliable, and improves production efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the structure of an embodiment of the liquid bag squeezing device of this application; Figure 2 for Figure 1 A schematic diagram of the combination of the fixed extrusion plate, the movable extrusion plate, and the crank-connecting rod mechanism in the liquid bag extrusion device; Figure 3 for Figure 2 Exploded view of the composite structure; Figure 4 for Figure 1 A schematic diagram of the movable extrusion plate in the liquid bag extrusion device; Figure 5 for Figure 1 A schematic diagram of the fixed extrusion plate in the liquid bag extrusion device; Figure 6 for Figure 1 A schematic diagram of the structure of the base, crank-connecting rod mechanism and drive mechanism combination in the liquid bag squeezing device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "located in," and "connected" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0019] refer to Figure 1As shown in the illustration, the liquid bag squeezing device includes a base 1, a fixed squeezing plate 2, a movable squeezing plate 3, a rotating shaft 4, a crank-connecting rod mechanism 5, and a drive mechanism 6. A support plate 11 is mounted on the base 1, and the fixed squeezing plate 2 is fixedly mounted on the base 1 via the support plate 11. One end of the fixed squeezing plate 2 (i.e., the first hinge end) and one end of the movable squeezing plate 3 (i.e., the second hinge end) are hinged together via the rotating shaft 4, forming an angled space between the fixed squeezing plate 2 and the movable squeezing plate 3 for squeezing the external liquid bag. The drive mechanism 6 is mounted on the base 1. One end of the crank-connecting rod mechanism 5 is connected to the movable squeezing plate 3, and the other end of the crank-connecting rod mechanism 5 is connected to the drive mechanism 6. The drive mechanism 6 drives the movable squeezing plate 3 to rotate around the rotating shaft 4 via the crank-connecting rod mechanism 5. The drive mechanism 6 is a linear drive mechanism; the crank-connecting rod mechanism 5 converts the reciprocating linear motion provided by the drive mechanism 6 into rotational motion to drive the movable squeezing plate 3 to rotate. If the liquid bag squeezing device of this embodiment is applied to a blood component separator, during use, the maintenance liquid bag is placed in the aforementioned angled space. The movable squeezing plate 3 rotates, the angle decreases, and the movable squeezing plate 3 and the fixed squeezing plate 2 together squeeze the maintenance liquid into the mother bag. This embodiment uses the angle formed by the movable squeezing plate 3 and the fixed squeezing plate 2 to squeeze the maintenance liquid bag, which helps to squeeze the maintenance liquid more cleanly and reduce residue. This embodiment uses a crank-connecting rod mechanism 5 to drive the movable squeezing plate 3 to rotate, which has a simple structure and low cost.

[0020] refer to Figure 2-5 As shown in the illustrated embodiment, one end of the fixed extrusion plate 2 (i.e., the first hinge end) and one end of the movable extrusion plate 3 (i.e., the second hinge end) are hinged together by a pivot 4. Specifically, each end of the first hinge end of the movable extrusion plate 3 has a hinge seat 31 along its lower edge. The movable extrusion plate 3 and the hinge seat 31 are an integral structure. Each hinge seat 31 has a first through hole 311 through which the pivot 4 passes. Each end of the second hinge end of the fixed extrusion plate 2 has a second through hole 21 through which the pivot 4 passes. There are two pivots 4. One end of the pivot 4 is fixedly installed in the first through hole 311 by a screw, and the other end of the pivot 4 is rotatably installed in the second through hole 21.

[0021] refer to Figure 2 , 6As shown, the crank-connecting rod mechanism 5 in the illustrated embodiment includes a sliding rod 51, a connecting rod 52, and a crank 53. One end of the sliding rod 51 is driven by the drive mechanism 6, which drives the sliding rod 51 to reciprocate linearly. The other end of the sliding rod 51 is hinged to one end of the connecting rod 52 via a hinge pin. The crank 53 is approximately T-shaped. The other end of the connecting rod 52 is hinged to the lower end of the crank 53 via a hinge pin. The upper left and upper right ends of the crank 53 are fixedly connected to two hinge seats 31, respectively. The crank-connecting rod mechanism 5 converts the reciprocating linear motion provided by the drive mechanism 6 into rotational motion to drive the movable extrusion plate 3 to rotate.

[0022] refer to Figure 6 As shown, the drive mechanism 6 in the illustrated embodiment includes a motor 61, a driving pulley 62, a driven pulley 63, a belt 64, a trapezoidal lead screw 65, a lead screw nut (not shown in the figure), a sliding rod mounting base 66, and a linear guide shaft 67. The motor 61 is fixedly mounted on the base 1 via a motor mounting plate 12. The driving pulley 62 is fixedly connected to the output shaft of the motor 61. The driven pulley 63 is connected to the driving pulley 62 via the belt 64, thereby driving the driven pulley 63 to rotate. The trapezoidal lead screw 65 is rotatably mounted on the base 1 at both ends via bearings. A driven pulley 63 is fitted onto one end of the trapezoidal lead screw 65. The lead screw nut is threaded onto the outer edge of the trapezoidal lead screw 65. A sliding rod mounting seat 66 is fitted onto the outer circumference of the lead screw nut. The linear guide shaft 67 is fixedly mounted on the base 1 at both ends, and is parallel to the trapezoidal lead screw 65. A linear bearing 68 is slidably fitted onto the linear guide shaft 67. The sliding rod mounting seat 66 is fixedly connected to the linear bearing 68, and the sliding rod 51 is fixedly mounted on the sliding rod mounting seat 66. Due to the restriction of the linear guide shaft 67, the sliding rod 51 moves linearly along the trapezoidal lead screw 65 as the lead screw nut cannot rotate. In the illustrated embodiment, there are two sets of linear guide shafts 67, with the trapezoidal lead screw 65 located between the two sets of linear guide shafts 67. The diameter of the driving pulley 62 is smaller than the diameter of the driven pulley 63. When rotating, the angular velocity of the driven pulley 63 is less than that of the driving pulley 62. That is, when the driving pulley 62 rotates very fast, the rotation speed of the driven pulley 63 will not be too fast. In this way, the motor 61 can better control the rotation amplitude of the driven pulley 63.

[0023] refer to Figure 1 , 5 As shown in the illustrated embodiment, the side of the fixed extrusion plate 2 facing the movable extrusion plate 3 is provided with a silicone pad 7. The silicone pad 7 serves as a compression buffer to ensure that the maintenance fluid bag can be squeezed clean. The free end of the movable extrusion plate 3 is provided with a viewing window 8 for easy observation of the compression of the maintenance fluid bag.

[0024] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural modifications made based on the concept of this utility model and the description and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A liquid bag squeezing device characterized by comprising: The device includes a base, a fixed extrusion plate, a movable extrusion plate, a rotating shaft, a crank-connecting rod mechanism, and a drive mechanism. The fixed extrusion plate is fixedly mounted on the base. One end of the fixed extrusion plate is hinged to one end of the movable extrusion plate via the rotating shaft. An angled space is formed between the fixed extrusion plate and the movable extrusion plate for extruding an external liquid bag. The drive mechanism is mounted on the base. One end of the crank-connecting rod mechanism is connected to the movable extrusion plate, and the other end of the crank-connecting rod mechanism is connected to the drive mechanism. The drive mechanism drives the movable extrusion plate to rotate around the rotating shaft via the crank-connecting rod mechanism.

2. The liquid bag pressing device according to claim 1, wherein The end where the movable extrusion plate is hinged to the fixed extrusion plate is the first hinge end. The lower edge of the first hinge end is provided with a hinge seat. The movable extrusion plate and the hinge seat are an integral structure.

3. The squeeze device of claim 2, wherein the at least one protrusion is a protrusion extending from the first surface of the base. The hinge seat is provided with a first through hole for the rotating shaft to pass through. One end of the rotating shaft is fixedly installed in the first through hole by screws. The end of the fixed extrusion plate that is hinged to the fixed extrusion plate is the second hinge end. The second hinge end is provided with a second through hole for the rotating shaft to pass through. The other end of the rotating shaft is rotatably installed in the second through hole.

4. The squeeze device of claim 3, wherein the protrusion is a ridge. The crank-connecting rod mechanism includes a sliding rod, a connecting rod, and a crank. One end of the sliding rod is driven to the drive mechanism, which can drive the sliding rod to move linearly back and forth. The other end of the sliding rod is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to one end of the crank. The other end of the crank is fixedly connected to the hinge seat of the movable pressing plate.

5. The squeeze device of claim 4, wherein the protrusion is a ridge. The first hinge end has hinge seats at both lower edges, each hinge seat has a first through hole, and there are two rotating shafts. The second hinge end has second through holes at both ends. The crank is roughly "T" shaped, and the upper left and upper right ends of the crank are fixedly connected to the two hinge seats respectively.

6. The squeeze device of claim 4, wherein The drive mechanism includes a motor, a driving pulley, a driven pulley, a belt, a trapezoidal lead screw, a lead screw nut, a sliding rod mounting base, and a linear guide shaft. The driving pulley is fixedly connected to the output shaft of the motor. The driven pulley is driven by the belt. The two ends of the trapezoidal lead screw are rotatably mounted on the base. The driven pulley is sleeved on one end of the trapezoidal lead screw. The lead screw nut is screwed onto the trapezoidal lead screw. The sliding rod mounting base is sleeved on the outer circumference of the lead screw nut. The two ends of the linear guide shaft are fixedly mounted on the base. The linear guide shaft is parallel to the trapezoidal lead screw. A linear bearing is slidably sleeved on the linear guide shaft. The sliding rod mounting base is fixedly connected to the linear bearing. The sliding rod is fixedly mounted on the sliding rod mounting base.

7. The squeeze device of claim 6, wherein the at least one protrusion is a protrusion extending from the first surface of the base. The number of linear guide shafts is two sets, and the trapezoidal lead screw is located between the two sets of linear guide shafts.

8. The squeeze device of claim 6, wherein, The diameter of the driving pulley is smaller than the diameter of the driven pulley.

9. The liquid bag pressing apparatus according to claim 1, wherein The fixed extrusion plate has a silicone pad on the side facing the movable extrusion plate.

10. The squeeze device of claim 6, wherein, The base is equipped with a support plate and a motor mounting plate. The fixed pressing plate is fixedly mounted on the base via the support plate. The motor is fixedly mounted on the base via the motor mounting plate. The sliding rod is hinged to the connecting rod via a hinge pin. The connecting rod is hinged to the crank via a hinge pin. The two ends of the trapezoidal lead screw are rotatably mounted on the base via bearings.

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