Film sealing device and film sealing equipment

Abstract

The utility model relates to a film sealing device and film sealing equipment. The film sealing device comprises a film sealing mechanism, the film sealing mechanism comprises a mounting base, at least one supporting column, a heating assembly and a first elastic piece, one end of the supporting column is connected with the mounting base and can slide up and down relative to the mounting base in the vertical direction, the other end of the supporting column is fixedly connected with the heating assembly, and the first elastic piece abuts against the portion between the supporting column and the mounting base; the firing pin mechanism comprises a first ejector pin and a second ejector pin, the first ejector pin is arranged on the mounting base, and the second ejector pin is arranged on the heating assembly; the transferring mechanism is in transmission connection with the mounting seat; when the heating assembly abuts against the membrane on the sample tube located on the membrane sealing station, the installation base and the first ejector pin continue to move towards the membrane sealing station under the action of the transferring mechanism, so that the first ejector pin abuts against the second ejector pin. According to the film sealing device and the film sealing equipment, the sealing effect can be unified.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a sealing device and sealing equipment. Background Technology

[0002] Before storing samples, they typically need to be sealed to ensure they are not contaminated or leaked. In related technologies, this is usually achieved by using a sealing device to seal the sample tube containing the sample.

[0003] In existing technologies, sample tubes are typically fixed at the sealing station for sealing. Different sample tube models have different heights, resulting in varying heights at the tube openings. Even for the same model of sample tube, manufacturing errors or installation errors in the sealing device can cause variations in the tube opening height. Due to these factors, problems such as excessively deep or shallow heat sealing may occur during the sealing process, leading to uneven sealing. Utility Model Content

[0004] Therefore, it is necessary to provide a sealing device and sealing equipment that can achieve a uniform sealing effect to address the above problems.

[0005] A sealing device, the sealing device having a sealing station, the sealing device comprising:

[0006] frame;

[0007] A sealing mechanism is provided opposite to the sealing station. The sealing mechanism includes a mounting base, at least one support column, a heating component, and a first elastic element. One end of the support column is connected to the mounting base and can slide up and down in the vertical direction relative to the mounting base. The other end of the support column is fixedly connected to the heating component. The first elastic element abuts against the support column and the mounting base.

[0008] The striking mechanism includes a first ejector pin and a second ejector pin disposed opposite to each other, the first ejector pin being disposed on the mounting base and the second ejector pin being disposed on the heating assembly; and

[0009] A transfer mechanism is mounted on the frame and is connected to the mounting base in a transmission manner. The transfer mechanism is used to drive the mounting base, the support column, the heating component, the first elastic element and the impact pin mechanism to move toward or away from the sealing station.

[0010] When the heating component presses against the membrane on the sample tube located at the sealing station, the mounting base and the first ejector pin continue to move toward the sealing station under the action of the transfer mechanism, so that the first ejector pin abuts against the second ejector pin.

[0011] In some embodiments, the firing pin mechanism further includes an assembly column disposed on the mounting base and having an assembly channel therein, wherein the first ejector pin is mounted and passes through the assembly channel.

[0012] In some embodiments, the mounting base has a through first mounting hole, the assembly column is at least partially engaged in the first mounting hole, and the first ejector pin passes through the first mounting hole.

[0013] In some embodiments, the firing pin mechanism further includes a second elastic element located within the assembly channel and abutting between the first ejector pin and the assembly post.

[0014] In some embodiments, the second elastic element is a compression spring, and the second elastic element is sleeved outside the first ejector pin.

[0015] In some embodiments, the mounting base has a through second mounting hole;

[0016] The sealing mechanism further includes a bushing installed in the second mounting hole. The support column includes a first sub-part, a second sub-part, and a third sub-part connected in sequence with increasing diameters. The first sub-part is slidably inserted into the bushing. The second sub-part is located between the mounting base and the heating assembly, and the diameter of the second sub-part is larger than the diameter of the second mounting hole. When the first sub-part slides vertically upward relative to the bushing, the distance between the surface of the second sub-part facing the mounting base and the mounting base decreases. The third sub-part is directly or indirectly connected to the heating assembly. The first elastic element abuts between the third sub-part and the mounting base.

[0017] In some embodiments, the sealing mechanism further includes a limiting member disposed at one end of the first sub-part away from the second sub-part, and the limiting member is used to overlap the side of the mounting base facing away from the heating assembly when the mounting base, the support column and the heating assembly move toward the sealing station.

[0018] In some embodiments, the limiting member is screwed to the first sub-part.

[0019] In some embodiments, the transfer mechanism includes a transfer drive, a transfer drive wheel, a transfer driven wheel, and a transfer timing belt. The transfer drive is mounted on the frame and is connected to the transfer drive wheel via a transmission connection. The transfer timing belt is sleeved on the transfer drive wheel and the transfer driven wheel. The mounting base is fixedly connected to the transfer timing belt.

[0020] A sealing device includes a sealing apparatus as described in any of the above embodiments.

[0021] In the aforementioned sealing device and equipment, for sample tubes with different nozzle heights, the heating element presses against the diaphragm, and the first and second ejector pins engage before the mounting base applies pressure to the heating element. This ensures a uniform distance between the mounting base and the heating element by the contact of the first and second ejector pins. Furthermore, with a uniform distance between the mounting base and the heating element, the compressed length of the first elastic element is also uniform. Based on these reasons, when the mounting base applies pressure after the first and second ejector pins engage, and the pressure is transmitted to the heating element through the first elastic element and the support column, the pressure magnitude or pressure variation is also uniform. Thus, for sample tubes with different nozzle heights, the pressure applied to the diaphragm during heat sealing is uniform in magnitude or variation, reducing the risk of excessively deep or shallow heat sealing for sample tubes with different nozzle heights, resulting in a uniform sealing effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the sealing device in one embodiment of this application.

[0023] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the sealing device.

[0024] Figure 3 for Figure 2 An enlarged schematic diagram of a portion of structure A in the sealing device shown.

[0025] Figure 4 for Figure 1 A schematic diagram of the support column in the sealing device shown.

[0026] Icon labels:

[0027] 1. Sealing device;

[0028] 10. Frame; 20. Sealing mechanism; 30. Impact pin mechanism; 40. Transfer mechanism;

[0029] 21. Mounting base; 211. First mounting hole; 212. Second mounting hole; 22. Support column; 221. First sub-part; 222. Second sub-part; 223. Third sub-part; 23. Heating assembly; 231. Fixing plate; 232. Heating element; 24. First elastic element; 25. Bushing; 26. Limiting element;

[0030] 31. First ejector pin; 32. Second ejector pin; 33. Assembly column; 331. Assembly channel; 34. Second elastic element;

[0031] 41. Transfer drive component; 42. Transfer drive pulley; 43. Transfer driven pulley; 44. Transfer timing belt. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Please refer to 1 in conjunction with this application. This application provides a sealing device for sealing sample tubes. The sealing device can be used alone, or it can be used in combination with a membrane removal device, a storage device, and a sample analysis device to form a sample testing pipeline.

[0039] As an example, the diaphragm can be made of aluminum foil, copper foil, etc., and the specific type can be set according to user needs, which is not limited here.

[0040] The sealing equipment includes a sealing device 1, which is used to cover the opening of the sample tube with a membrane and heat-seal the membrane. It can be understood that heat-sealing the membrane is equivalent to sealing the film.

[0041] Please refer to the following: Figures 1 to 3The sealing device 1 includes a sealing station where sample tubes are fixed. The sealing device 1 comprises a frame 10, a sealing mechanism 20, a striking pin mechanism 30, and a transfer mechanism 40. The sealing mechanism 20 is positioned opposite the sealing station and includes a mounting base 21, at least one support column 22, a heating component 23, and a first elastic element 24. One end of the support column 22 is connected to the mounting base 21 and can slide vertically relative to the mounting base 21. The other end of the support column 22 is fixedly connected to the heating component 23. The first elastic element 24 abuts against the support column 22 and the mounting base 21. The striking pin mechanism 30 includes a first striking pin 31 and a second striking pin 32 positioned opposite each other. The first striking pin 31 is mounted on the mounting base 21, and the second striking pin 32 is mounted on the heating component 23. The transfer mechanism 40 is mounted on the frame 10 and is connected to the mounting base 21 via a transmission connection. The transfer mechanism 40 is used to drive the mounting base 21, support column 22, heating component 23, first elastic element 24, and impact pin mechanism 30 to move toward or away from the sealing station. When the heating component 23 presses against the membrane on the sample tube located at the sealing station, the mounting base 21 and the first impact pin 31 continue to move toward the sealing station under the action of the transfer mechanism 40, so that the first impact pin 31 abuts against the second impact pin 32.

[0042] Typically, the sealing mechanism 20 is located above the sealing station. The transfer mechanism 40 drives the sealing mechanism 20 and the impact pin mechanism 30 to move downward toward the sealing station, or the transfer mechanism 40 drives the sealing mechanism 20 and the impact pin mechanism 30 to move upward away from the sealing station.

[0043] Specifically, the mounting base 21, support column 22 and heating component 23 of the sealing mechanism 20 are arranged in a vertically downward direction. One end of the support column 22 is connected to the mounting base 21 and can slide up and down in the vertical direction relative to the mounting base 21. The other end of the support column 22 is fixedly connected to the heating component 23.

[0044] As an example, the support column 22 can be fixedly connected to the heating component 23 by screwing, welding or other means. As an example, there are multiple support columns 22, one end of which is connected to the mounting base 21 and they are arranged at intervals along the circumference of the mounting base 21 to improve the stability and reliability of the connection between the mounting base 21 and the heating component 23.

[0045] The first elastic element 24 abuts against the support column 22 and the mounting base 21. As an example, the first elastic element 24 is a compression spring, and it is sleeved on the outside of the support column 22 to facilitate its installation. Moreover, the support column 22 supports the first elastic element 24 radially, so that the first elastic element 24 can only deform along its own axial direction (i.e., the vertical direction), thereby improving the stability and reliability of the deformation of the first elastic element 24.

[0046] The heating assembly 23 includes a fixing plate 231 and a heating element 232. The fixing plate 231 is fixedly connected to the support column 22. The heating element 232 is disposed on the bottom side of the fixing plate 231 facing away from the mounting base 21 and is used to heat seal the diaphragm when in contact with the diaphragm.

[0047] As an example, both the first ejector pin 31 and the second ejector pin 32 are made of metal (e.g., copper). The first ejector pin 31 and the second ejector pin 32 are arranged vertically opposite each other. The first ejector pin 31 is disposed on the mounting base 21 and protrudes from the side of the mounting base 21 facing the fixing plate 231. The second ejector pin 32 is mounted on the fixing plate 231 and protrudes from the side of the fixing plate 231 facing the mounting base 21.

[0048] In actual operation, the transfer mechanism 40 drives the mounting base 21, support column 22, heating assembly 23, first elastic element 24, and impact pin mechanism 30 to move synchronously toward the sealing station. When the heating assembly 23 presses against the membrane at the sample tube opening in the sealing station, the heating assembly 23 stops moving due to the reaction force of the sample tube. Then, the transfer mechanism 40 continues to drive the mounting base 21 and first impact pin 31 toward the sealing station. During this process, the support column 22 slides vertically upward relative to the mounting base 21, shortening the length of the support column 22 between the mounting base 21 and the heating assembly 23. Simultaneously, the first elastic element 24 deforms and compresses, and the distance between the mounting base 21 and the heating assembly 23 gradually decreases. After the first impact pin 31 abuts against the second impact pin 32, the transfer mechanism 40 continues to drive the mounting base 21 toward the sealing station to apply pressure. The applied pressure is transmitted to the heating assembly 23 through the first elastic element 24 and support column 22, allowing the heating assembly 23 to seal the membrane.

[0049] In this application, for sample tubes with different nozzle heights, the mounting base 21 applies pressure to the heating component 23 only after the heating component 23 presses against the diaphragm and the first ejector pin 31 and the second ejector pin 32 are in contact. It is understood that the contact between the first ejector pin 31 and the second ejector pin 32 ensures a uniform distance between the mounting base 21 and the heating component 23. Furthermore, with a uniform distance between the mounting base 21 and the heating component 23, the compressed length of the first elastic element 24 is also uniform. Based on these reasons, when the mounting base 21 applies pressure after the first ejector pin 31 and the second ejector pin 32 have contacted, and the pressure is transmitted to the heating component 23 through the first elastic element 24 and the support column 22, the pressure magnitude or pressure variation is also uniform. Thus, for sample tubes with different nozzle heights, the pressure applied to the diaphragm by the heating component 23 during heat sealing is uniform in magnitude or variation, thereby reducing the risk of excessively deep or shallow heat sealing for sample tubes with different nozzle heights, resulting in a uniform sealing effect. Furthermore, the sealing device 1 in this application can automatically adjust the sealing height of the heating component 23 according to the height of the sample tube opening, so that the sealing height of the heating component 23 is consistent with the height of the sample tube opening, which is compatible with the sealing of sample tubes with different opening heights, meets the needs of different detection processes, has high device utilization, and is highly versatile and reliable.

[0050] In some embodiments, the striking pin mechanism 30 further includes conductive wires and a circuit board. One of the first striking pin 31 and the second striking pin 32 is grounded, and the other of the first striking pin 31 and the second striking pin 32 is connected to the circuit board via the conductive wire. The circuit board is connected to the controller. When the first striking pin 31 and the second striking pin 32 abut against each other, the first striking pin 31 and the second striking pin 32 make contact and conduct the circuit in the circuit board. When the circuit board detects that the circuit is conducting, it sends a signal to the controller. The controller determines the zero-point position to ensure that the heat sealing operation can start from the same relative height for all sample tube openings. Then, starting from the zero-point position, the mounting base 21 continues to move downward under the action of the transfer mechanism 40 and applies pressure to the heating assembly 23 for heat sealing.

[0051] It is understood that the same relative height refers to the relative distance between the mounting base 21 and the heating component 23. Starting from the same relative height, the mounting base 21 and the heating component 23 apply heat-sealing pressure to the openings of all sample tubes, and the applied pressure is uniform.

[0052] The zero point position is the position of the encoder corresponding to the power source that drives the mounting base 21 in the transfer mechanism 40. Determining the encoder position also determines the position of the mounting base 21 and the distance between the mounting base 21 and the heating component 23.

[0053] Specifically, the controller can be part of the sealing device 1, or it can be an external terminal that is also electrically connected to the transfer mechanism 40 and the heating component 23 and is used to control the operation of the transfer mechanism 40 and the heating component 23.

[0054] In some embodiments, the firing pin mechanism 30 further includes an assembly post 33, which is disposed on the mounting base 21 and has an assembly channel 331 therein. The first ejector pin 31 is installed and passes through the assembly channel 331. This design facilitates the installation of the first ejector pin 31 and can limit the movement of the first ejector pin 31.

[0055] In some embodiments, the mounting base 21 has a through first mounting hole 211, the mounting post 33 is at least partially held in the first mounting hole 211, and the first ejector pin 31 passes through the first mounting hole 211. This design facilitates the fixing of the mounting post 33 on the mounting base 21.

[0056] In some embodiments, the firing pin mechanism 30 further includes a second elastic element 34, which is located within the assembly channel 331 and abuts against the first ejector pin 31 and the assembly post 33.

[0057] The assembly column 33 is used to install the first ejector pin 31 and the second elastic element 34, and to guide the compression deformation of the second elastic element 34.

[0058] As an example, the second elastic element 34 is a compression spring, which is sleeved on the outside of the first ejector pin 31 to facilitate its installation. Moreover, the first ejector pin 31 supports the second elastic element 34 radially, so that the second elastic element 34 can only deform along its own axial direction (i.e., the vertical direction), thereby improving the stability and reliability of the deformation of the second elastic element 34.

[0059] On the one hand, the second elastic element 34 serves as a buffer to reduce the impact force between the first ejector pin 31 and the second ejector pin 32 when the first ejector pin 31 moves downward under the drive of the mounting base 21, ensuring that the first ejector pin 31 will not be damaged when it comes into contact with the second ejector pin 32. On the other hand, when the first ejector pin 31 and the second ejector pin 32 abut against each other, and the mounting base 21 continues to move relative to the heating assembly 23 toward the sealing station, the compression degree of the first elastic element 24 gradually increases. Therefore, the pressure transmitted to the heating assembly 23 through the first elastic element 24 also gradually increases, causing the pressure applied to the film by the heating assembly 23 during heat sealing to gradually increase from small to large, resulting in a good heat sealing effect. During this process, the second elastic element 34 is gradually compressed, so the first ejector pin 31 slides upward in the vertical direction relative to the mounting base 21. Therefore, even when the first ejector pin 31 and the second ejector pin 32 can come into contact, the first ejector pin 31 remains stationary relative to the second ejector pin 32 and continues to abut against each other, preventing the first ejector pin 31 from continuing to move vertically downward and causing damage to both the first ejector pin 31 and the second ejector pin 32.

[0060] As described above, in this embodiment, heat sealing can be divided into three stages. In the first stage, under the action of the transfer mechanism 40, the mounting base 21 drives the support column 22, heating component 23, first elastic element 24, first ejector pin 31, and second ejector pin 32 to move vertically downwards synchronously until the heating component 23 abuts against the membrane. In the second stage, under the action of the transfer mechanism 40, the mounting base 21 drives the first ejector pin 31 to move downwards relative to the second ejector pin 32 and the heating component 23 until the first ejector pin 31 abuts against the second ejector pin 32, ensuring that the heat sealing operation can start from the same relative height for all sample tube openings. In the third stage, under the action of the transfer mechanism 40, the mounting base 21 continues to move downwards and applies pressure to the heating component 23 to perform heat sealing. Through these three stages, the uniformity of the sealing film can be ensured. After heat sealing is completed, the mounting base 21 drives the support column 22, heating component 23, first elastic element 24, first ejector pin 31 and second ejector pin 32 to move vertically upward synchronously. The heating component 23 separates from the diaphragm and resets under the action of the first elastic element 24. The first ejector pin 31 resets under the action of the second elastic element 34.

[0061] Please refer to the following: Figures 1 to 4 In some embodiments, the mounting base 21 has a through second mounting hole 212. The sealing mechanism 20 also includes a bushing 25, which is installed in the second mounting hole 212. The support column 22 includes a first sub-part 221, a second sub-part 222, and a third sub-part 223 connected in sequence with increasing diameters. The first sub-part 221 is slidably inserted into the bushing 25. The second sub-part 222 is located between the mounting base 21 and the heating assembly 23, and the diameter of the second sub-part 222 is larger than the diameter of the second mounting hole 212. When the first sub-part 221 slides vertically upward relative to the bushing 25, the distance between the surface of the second sub-part 222 facing the mounting base 21 and the mounting base 21 decreases. The third sub-part 223 is directly or indirectly connected to the heating assembly 23, and the first elastic member 24 abuts against the third sub-part 223 and the mounting base 21.

[0062] In actual operation, the second sub-part 222 and the mounting base 21 are spaced apart in the first and second stages of heat sealing. In the third stage of heat sealing, the second sub-part 222 abuts against the mounting base 21. The diameter of the second sub-part 222 is larger than the diameter of the second mounting hole 212. Therefore, in the third stage of heat sealing, it can be ensured that the second sub-part 222 abuts against the mounting base 21. At this time, the position between the heating component 23 and the mounting base 21 is fixed, and the heating component 23 stably applies pressure to the diaphragm and performs heat sealing, resulting in a good heat sealing effect.

[0063] In some embodiments, the sealing mechanism 20 further includes a limiting member 26, which is disposed at one end of the first sub-part 221 away from the second sub-part 222, and the limiting member 26 is used to overlap the side of the mounting base 21 facing away from the heating component 23 when the mounting base 21, the support column 22 and the heating component 23 move toward the sealing station.

[0064] Specifically, in the first stage of heat sealing, the limiting member 26 overlaps the side of the mounting base 21 facing away from the heating assembly 23. In the second stage of heat sealing, the limiting member 26 separates from the mounting base 21. In the third stage of heat sealing, when the mounting base 21 abuts against the second sub-part 222 of the support column 22, the vertical distance between the limiting member 26 and the mounting base 21 reaches its maximum value.

[0065] By setting the limiting member 26, the first sub-part 221 of the support column 22 can be prevented from dislodging downward from the bushing 25, thus ensuring the reliability of the connection between the support column 22 and the mounting base 21.

[0066] In some embodiments, the limiting member 26 is screwed to the first sub-part 221. As an example, the limiting member 26 has an external thread, and the first sub-part 221 of the support column 22 has an internal thread, with the external thread engaging with the internal thread. Using a screw connection for assembly between the limiting member 26 and the first sub-part 221 is simple and convenient.

[0067] In some embodiments, the transfer mechanism 40 includes a transfer drive 41, a transfer drive wheel 42, a transfer driven wheel 43, and a transfer timing belt 44. The transfer drive 41 and the transfer driven wheel 43 are mounted on the frame 10, and the transfer drive 41 is connected to the transfer drive wheel 42 in a transmission connection. The transfer timing belt 44 is sleeved on the transfer drive wheel 42 and the transfer driven wheel 43, and the mounting base 21 is fixedly connected to the transfer timing belt 44.

[0068] Specifically, the transfer drive wheel 42 and the transfer driven wheel 43 are arranged vertically upwards and downwards.

[0069] In actual operation, the power of the transfer drive 41 is transmitted to the mounting base 21 through the transfer timing belt 44, so that the mounting base 21 can drive the support column 22, heating component 23 and impact pin mechanism 30 to move toward or away from the sealing station.

[0070] By setting up the transfer drive component 41, the transfer drive wheel 42, the transfer driven wheel 43, and the transfer timing belt 44, the transfer mechanism 40 can smoothly drive the mounting base 21 to move, resulting in a more stable and reliable sealing effect.

[0071] It is worth mentioning that, in this embodiment, the transfer drive 41 is the power source of the aforementioned transfer mechanism 40.

[0072] In the aforementioned sealing device 1 and sealing equipment, for sample tubes with different nozzle heights, the heating component 23 presses against the membrane, and the first ejector pin 31 and the second ejector pin 32 abut against each other, before the mounting base 21 applies pressure to the heating component 23. It can be understood that the abutment of the first ejector pin 31 and the second ejector pin 32 ensures a uniform distance between the mounting base 21 and the heating component 23. Furthermore, with a uniform distance between the mounting base 21 and the heating component 23, the compressed length of the first elastic element 24 is also uniform. Based on these reasons, after the first ejector pin 31 and the second ejector pin 32 abut against each other, the mounting base 21 applies pressure, and the pressure is transmitted to the heating component 23 through the first elastic element 24 and the support column 22, resulting in uniform pressure magnitude or pressure variation. Thus, for sample tubes with different nozzle heights, the pressure applied to the membrane by the heating component 23 during heat sealing is uniform in magnitude or variation, thereby reducing the risk of excessively deep or shallow heat sealing for sample tubes with different nozzle heights, resulting in a uniform sealing effect.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A sealing device, characterized in that, The sealing device has a sealing station, and the sealing device includes: Rack (10); A sealing mechanism (20) is arranged opposite to the sealing station. The sealing mechanism (20) includes a mounting base (21), at least one support column (22), a heating component (23), and a first elastic element (24). One end of the support column (22) is connected to the mounting base (21) and can slide up and down relative to the mounting base (21) in the vertical direction. The other end of the support column (22) is fixedly connected to the heating component (23). The first elastic element (24) abuts against the support column (22) and the mounting base (21). The striking pin mechanism (30) includes a first ejector pin (31) and a second ejector pin (32) disposed opposite to each other. The first ejector pin (31) is disposed on the mounting base (21), and the second ejector pin (32) is disposed on the heating assembly (23). The transfer mechanism (40) is installed on the frame (10) and is connected to the mounting base (21) in a transmission manner. The transfer mechanism (40) is used to drive the mounting base (21), the support column (22), the heating component (23), the first elastic element (24) and the impact pin mechanism (30) to move toward or away from the sealing station. When the heating component (23) presses against the membrane on the sample tube located at the sealing station, the mounting base (21) and the first ejector pin (31) continue to move toward the sealing station under the action of the transfer mechanism (40) so that the first ejector pin (31) and the second ejector pin (32) come into contact.

2. The sealing device according to claim 1, characterized in that, The firing pin mechanism (30) further includes an assembly column (33), which is disposed on the mounting base (21) and has an assembly channel (331) therein, through which the first ejector pin (31) is installed and passes through the assembly channel (331).

3. The sealing device according to claim 2, characterized in that, The mounting base (21) has a through first mounting hole (211), the assembly column (33) is at least partially held in the first mounting hole (211), and the first ejector pin (31) passes through the first mounting hole (211).

4. The sealing device according to claim 2, characterized in that, The firing pin mechanism (30) further includes a second elastic element (34), which is located in the assembly channel (331) and abuts against the first ejector pin (31) and the assembly post (33).

5. The sealing device according to claim 4, characterized in that, The second elastic element (34) is a compression spring, and the second elastic element (34) is sleeved on the outside of the first ejector pin (31).

6. The sealing device according to claim 1, characterized in that, The mounting base (21) has a through second mounting hole (212); The sealing mechanism (20) further includes a bushing (25) installed in the second mounting hole (212). The support column (22) includes a first sub-part (221), a second sub-part (222), and a third sub-part (223) connected in sequence with increasing diameters. The first sub-part (221) is slidably inserted into the bushing (25). The second sub-part (222) is located between the mounting base (21) and the heating assembly (23), and the second sub-part (223)... The diameter of the first sub-part (222) is larger than the diameter of the second mounting hole (212). When the first sub-part (221) slides upward in the vertical direction relative to the bushing (25), the distance between the surface of the second sub-part (222) facing the mounting base (21) and the mounting base (21) decreases. The third sub-part (223) is directly or indirectly connected to the heating assembly (23). The first elastic member (24) abuts between the third sub-part (223) and the mounting base (21).

7. The sealing device according to claim 6, characterized in that, The sealing mechanism (20) further includes a limiting member (26), which is disposed at the end of the first sub-part (221) away from the second sub-part (222), and the limiting member (26) is used to overlap the side of the mounting base (21) facing away from the heating component (23) when the mounting base (21), the support column (22) and the heating component (23) move toward the sealing station.

8. The sealing device according to claim 7, characterized in that, The limiting member (26) is screwed to the first sub-part (221).

9. The sealing device according to claim 1, characterized in that, The transfer mechanism (40) includes a transfer drive (41), a transfer drive wheel (42), a transfer driven wheel (43), and a transfer timing belt (44). The transfer drive (41) is mounted on the frame (10) and is connected to the transfer drive wheel (42) in a transmission manner. The transfer timing belt (44) is sleeved on the transfer drive wheel (42) and the transfer driven wheel (43). The mounting base (21) is fixedly connected to the transfer timing belt (44).

10. A sealing device, characterized in that, Includes the sealing device as described in any one of claims 1 to 9 above.

Images