Filter assembly, filter tank, filter and sample separation and extraction instrument

Abstract

The utility model discloses a filtering assembly, a filtering tank, a filter and a sample separation and extraction instrument. Wherein the filter assembly is used for fixing the filter screen, the filter assembly comprises a supporting frame and a pressing edge strip, the filter screen is erected on the supporting frame, a liquid passing area is formed on the inner side of the supporting frame, and liquid passing through the filter screen passes through the liquid passing area to enter the next operation link; and the pressing edge strip is connected with the supporting frame, so that the filter screen is clamped between the pressing edge strip and the supporting frame. According to the filtering assembly, the pressing edge strips are additionally arranged on the filtering assembly, the pressing edge strips can be matched with the supporting frame to clamp the filtering net, the filtering net is fixed to the filtering assembly, and meanwhile the filtering net can better participate in filtering operation.

Description

Technical Field

[0001] The utility model relates to the technical field of sample extraction, in particular to a filtering component, a filtering tank, a filter and a sample separation and extraction instrument. Background Art

[0002] With the rapid development of sample analysis instruments, the functions of sample analysis instruments are becoming increasingly powerful, and the accuracy of sample analysis instruments is becoming higher and higher, which is of great significance to medical treatment and scientific research.

[0003] In the sample analysis instrument, a filter is provided inside to filter the collected specimens, so as to obtain the sample to be used. However, in the existing filter, in order to make the filter mesh in a tensioned state, the filter mesh is usually fixed to the frame of the filter by gluing its edge. Usually, the manufacturer will convexly set the colloid on the frame of the filter by gluing the instrument to achieve the gluing connection between the filter mesh and the filter frame. However, in order to ensure that the sample to be used can correctly show its own component information, it is necessary to control the amount of colloid to avoid the specimen from contacting the colloid during the filtration process, which will cause the colloid component to affect the component information of the sample to be used. In this way, in order to ensure the connection effect between the filter mesh and the filter frame, the manufacturer usually uses precision instruments instead of manual methods to perform the gluing operation on the frame, resulting in a high actual cost of connecting the filter mesh to the filter mesh. Utility Model Content

[0004] In view of this, the present application provides a filter assembly, a filter tank, a filter and a sample separation and extraction instrument, wherein the filter tank, the filter and the sample separation and extraction instrument can all apply the filter assembly. The present application aims to improve the filter assembly by adding a pressed edge strip in the filter assembly to fix the filter screen to the filter assembly and make the filter screen better participate in the filtering operation, so as to solve the above technical problems.

[0005] A first aspect of an embodiment of the present application provides a filter assembly for fixing a filter screen, the filter assembly comprising a support frame and pressed side strips, wherein the filter screen is mounted on the support frame, and a liquid passing area is formed on the inner side of the support frame, and the liquid passing through the filter screen passes through the liquid passing area to enter the next operation link; the pressed side strips are connected to the support frame to clamp the filter screen between the pressed side strips and the support frame.

[0006] Among them, under the combined clamping action of the pressing strip and the support frame, the periphery of the filter screen can be stably connected to the filter assembly, and there will be no gap between the filter screen and the support frame due to the warping of the edge of the filter screen. Thus, it can be ensured that the standby sample is formed after the specimen participates in the filtering operation, thereby ensuring the purity of the standby sample. And because the pressing strip can be made of common materials, the production cost of the filter assembly is successfully reduced; in addition, since the pressing strip and the support frame are separately arranged, the pressing strip can cooperate with the support frame to clamp the filter screen. When the filter screen needs to be replaced or the position of the filter screen needs to be adjusted, the pressing strip and the support frame can be separated to replace and adjust the filter screen, improving the convenience of replacing and adjusting the filter screen; moreover, compared with the embodiment in which the filter screen is adhesively fixed to the support frame, the filter assembly in this embodiment can ensure the fixation and stretching of the filter screen, and at the same time, there will be no glue marks left on the support frame due to the replacement of the filter screen. In this way, while ensuring the filtering effect of the filter screen, it will not affect the subsequent recycling of the support frame, effectively increasing the number of times the filter assembly can be used.

[0007] In some embodiments of the first aspect, the support frame is provided with at least one limiting groove, and the pressing strip is provided with at least one limiting protrusion, or, the support frame is provided with at least one limiting protrusion, and the pressing strip is provided with at least one limiting groove; when the pressing strip and the support frame are cooperatively connected, a limiting protrusion is correspondingly clamped in a limiting groove. In this way, through the clamping connection between the limiting protrusion and the limiting groove, the connection stability between the support frame and the pressing strip is higher, thereby improving the fixing effect of the filter assembly on the filter screen.

[0008] In some embodiments of the first aspect, the limiting protrusion and the limiting groove are in interference fit to further improve the fixing effect of the filter assembly on the filter screen.

[0009] In some embodiments of the first aspect, the support frame includes at least one frame bar, and at least one pressing strip is correspondingly connected to one frame bar. The limiting protrusion is arranged on one of the opposite surfaces of the frame bar and the pressing strip, and the limiting groove is arranged on the other of the opposite surfaces of the frame bar and the pressing strip. The filter screen is clamped between the pressing strip and the frame bar. In this way, the filter screen can be fixed to the filter assembly.

[0010] In some embodiments of the first aspect, the support frame includes a plurality of frame bars, and one frame bar is correspondingly connected to one pressing strip; the plurality of pressing strips are connected end to end to form a pressing border frame, and at least one first pressing strip is included in the pressing border frame. The first pressing strip includes a first pressing part and a second pressing part that are slidably connected. By changing the relative positions of the first pressing part and the second pressing part, the length of the first pressing strip is changed. In this way, the applicable range of the pressing border frame is improved.

[0011] In some embodiments of the first aspect, the support frame includes a first connecting surface and a second connecting surface, and the pressed edge strip includes a first contact surface and a second contact surface; when the pressed edge strip is cooperatively connected with the support frame, the first connecting surface corresponds to the first contact surface, and the second connecting surface corresponds to the second contact surface; wherein, one of the first contact surface and the first connecting surface is provided with a limiting protrusion, and the other is provided with a limiting groove, and one of the second connecting surface and the second contact surface is provided with a limiting protrusion, and the other is provided with a limiting groove, so as to realize the connection between the pressed edge strip and the support frame.

[0012] In some embodiments of the first aspect, the support frame includes a side frame, an inner wall of the side frame is connected to the frame bar, the first connecting surface and the second connecting surface are respectively arranged on the surface of the side frame and the frame bar facing the pressed side bar, and the first contact surface and the second contact surface are respectively arranged on the surface of the pressed side bar facing the frame bar and the side frame. In this way, the side frame and the frame bar can limit the specimen space. When the filter assembly is involved in the filtering operation, the side frame can limit the specimen to be filtered in the specimen space, thereby preventing the specimen from overflowing and contaminating the filter tank or other components in the sample separation and extraction instrument, thereby affecting the subsequent operation of the filter tank or the sample separation and extraction instrument.

[0013] In some embodiments of the first aspect, the support frame includes a support keel, and the side frame is circumferentially arranged around the periphery of the support keel to jointly limit the specimen space with the support keel, and the support keel forms a liquid-passing area; the pressed edge strip is provided with a transition slope, and along the width direction of the pressed edge strip, the transition slope is inclined from one side of the pressed edge strip to the other side; when the filter screen is clamped between the pressed edge strip and the support frame, the side frame is connected to the filter screen through the transition slope, so that the amount of specimens participating in the filtration is guaranteed to a certain extent, and the reference degree of the stand-by samples collected by the filtration due to incomplete participation of the specimens in the filtration is reduced, thereby avoiding affecting the analysis results of subsequent analysis operations.

[0014] In some embodiments of the first aspect, the pressed edge strip is provided with a taking recess to facilitate separation of the pressed edge strip from the support frame.

[0015] A second aspect of an embodiment of the present application provides a filter tank, which includes a tank body and the filter assembly of the first aspect of the embodiment of the present application, wherein a filter cavity is formed inside the tank body, and the filter assembly is placed in the filter cavity.

[0016] The third aspect of the embodiment of the present application provides a filter, comprising a mixing tank, the filter tank in the second aspect of the embodiment of the present application and a storage tank arranged in sequence. When the filter is operating, the specimen is first added to the mixing tank, and after pretreatment in the mixing tank, the specimen is moved to the filter tank and filtered in the filter tank to form a stand-by sample that enters the storage tank.

[0017] The fourth aspect of the embodiment of the present application provides a sample separation and extraction instrument, including a frame, an aggregate assembly and the filter of the third aspect of the embodiment of the present application, wherein the mixing tank, the filter tank and the storage tank are all connected to the frame; the aggregate assembly is connected to the frame, and the aggregate assembly is used to collect stand-by samples output by the storage tank.

[0018] In some embodiments of the fourth aspect, the sample separation and extraction instrument is an enterobacteria separation and extraction instrument.

[0019] For the main beneficial effects of the second and fourth aspects, please refer to the beneficial effects of the first aspect and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a simplified structural diagram of the sample separation and extraction instrument;

[0022] Figure 2 It is a structural diagram of the filter assembly;

[0023] Figure 3 for Figure 2 Explosion icon of

[0024] Figure 4 for Figure 2 A top view of

[0025] Figure 5 for Figure 4 Cross-section at AA in the middle;

[0026] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0027] Figure 7 It is an enlarged diagram of another partial matching mode of the pressed edge strip and the support frame;

[0028] Figure 8 This is an enlarged diagram of another local matching method of the pressed edge strip and the support frame.

[0029] Description of reference numerals:

[0030] 1000 - Sample separation and extraction instrument, 100 - Filter, 110 - Filter tank, 110a - Tank body, 110b - Filter chamber, 120 - Stirring tank, 140 - Storage tank, 200 - Frame, 300 - Aggregate component, 1 - Filter component, 11 - Support frame, 13 - Pressing border, 111 - Liquid passing area, 112 - Limit groove, 113 - First connection surface, 114 - Second connection surface, 116 - Frame bar, 117 - Side frame, 118 - Support keel, 119 - Specimen space, 121 - Limit protrusion, 122 - First contact surface, 123 - Second contact surface, 125 - Transition inclined surface, 126 - Taking recess, 130 - Pressing edge strip, 131 - First pressing edge strip, 1311 - First pressing part, 1312 - Second pressing part, 132 - Second pressing edge strip. Detailed implementation manners

[0031] In order to make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0032] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The use of words such as "a", "one" or "the" in this application does not also represent a limitation in quantity, but only means that there is at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before such words cover the elements or objects listed after such words and their equivalents, without excluding other elements or objects. "Connection" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0033] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0034] The following will be combined with the attached Figures 1-6 in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application.

[0035] Please first refer to Figure 1The present application provides a sample separation and extraction instrument 1000, which includes a frame 200, a filter 100 and a collection assembly 300. The collection assembly 300 is used to collect the sample to be used (which may be a sample solution) output by a storage tank 140. The filter 100 includes a mixing tank 120, a filtering tank 110 and a storage tank 140 arranged in sequence. When the filter 100 is in operation, the specimen and the solution are first added to the mixing tank 120, and then After pretreatment in the mixing tank 120, a sample suspension is generated, and the sample suspension is moved to the filter tank 110 and filtered in the filter tank 110 to form a stand-by sample that enters the storage tank 140. The mixing tank 120, the filter tank 110 and the storage tank 140 are all connected to the frame 200; the filter tank 110 includes a tank body 110a and a filter assembly 1, and a filter cavity 110b is formed inside the tank body 110a, and the filter assembly 1 is placed in the filter cavity 110b.

[0036] It should be understood that when the sample separation and extraction instrument 1000 is operating, the operating object needs to first move the sample and solution into the mixing tank 120, and generate a sample suspension after stirring in the mixing tank 120. The sample suspension is moved to the filter cavity 110b of the filter tank 110, and filtered by the filter component 1 to form a stand-by sample. The stand-by sample formed by the filtering process of the filter component 1 is moved to the storage tank 140 and temporarily stored by the storage tank 140. After the aggregate component 300 places the aggregate container, the storage tank 140 correspondingly moves the stand-by sample into the aggregate container, so that the operating object can transfer the stand-by sample by picking up and moving the aggregate container, thereby transferring the stand-by sample to another place for detection.

[0037] Please refer to Figure 2 and Figure 3 In the above-mentioned embodiment, the filter assembly 1 includes a support frame 11 and a pressed edge strip 130, wherein the filter screen is mounted on the support frame 11, and a liquid passing area 111 is formed on the inner side of the support frame 11, and the liquid passing through the filter screen passes through the liquid passing area 111 to enter the next operation link; the pressed edge strip 130 is connected to the support frame 11 to clamp the filter screen between the pressed edge strip 130 and the support frame 11.

[0038] Specifically, when the filter assembly 1 is fixedly connected to the filter screen, the periphery of the filter screen is first overlapped on the support frame 11, and then the pressed edge strip 130 is connected to the support frame 11 to clamp the filter screen between the pressed edge strip 130 and the support frame 11. In this way, the connection between the pressed edge strip 130 and the support frame 11 forms a fixing effect on the filter screen, so that the filter screen is in a planar stretched state under the connection action of the filter assembly 1. During the filtration operation of the filter tank 110, the sample can be stably placed on the filter screen and participate in the filtration operation. The filtrate filtered out by the sample through the filter screen passes through the liquid passing area 111 to enter the subsequent operation link.

[0039] Among them, the pressed edge strip 130 and the support frame 11 cooperate with each other to clamp the filter screen between the two, so as to fix the filter screen to the filter assembly 1. Because the pressed edge strip 130 and the support frame 11 are separately arranged, the pressed edge strip 130 can be matched with the size and position of the support frame 11 to clamp the periphery of the filter screen between the pressed edge strip 130 and the support frame 11. In this way, while ensuring that the filter screen is fixed to the filter assembly 1, it can also ensure that the edges of the filter screen are compacted.

[0040] In the embodiment where the filter is bonded to the support frame 11 by a colloid, the edge of the filter may be lifted up due to uneven glue coating or insufficient glue coating, thereby forming a gap between the filter and the support frame 11 at the periphery of the support frame 11. During the filtration process, the specimen or sample may directly leak through the gap without being filtered by the filter, which may cause impurities in the specimen to enter the storage tank 140, thereby affecting the purity of the sample to be used and causing significant interference to the subsequent detection results.

[0041] In the present embodiment, under the joint clamping action of the pressed edge strip 130 and the support frame 11, the periphery of the filter screen can be stably connected to the filter assembly 1, and no gap will appear between the filter screen and the support frame 11 due to the warping of the edge of the filter screen, thereby ensuring that the sample to be used is formed after the specimen participates in the filtration operation, thereby ensuring the purity of the sample to be used; in addition, because the pressed edge strip 130 can be made of common materials, such as rubber, plastic, etc., the production cost of the filter assembly 1 is also successfully reduced.

[0042] In addition, the pressed side strip 130 and the support frame 11 are separately provided, so that the pressed side strip 130 can cooperate with the support frame 11 to clamp the filter. When the filter needs to be replaced or the position of the filter needs to be adjusted, the filter can be replaced or adjusted by separating the pressed side strip 130 from the support frame 11, thereby improving the convenience of replacing and adjusting the filter. In addition, compared with the embodiment in which the filter is bonded and fixed to the support frame 11, the filter assembly 1 in this embodiment can ensure the fixing and stretching of the filter without leaving glue marks on the support frame 11 due to the replacement of the filter. In this way, while ensuring the filtering effect of the filter, it will not affect the subsequent recycling of the support frame 11, thereby effectively improving the number of times the filter assembly 1 is used.

[0043] It should be noted that when the sample separation and extraction instrument 1000 is operating, the pretreated specimen leaves the mixing tank 120 and moves to the filter screen set up on the support frame 11 to participate in the filtration operation. After the filtrate in the specimen passes through a layer of filter screen, it will pass through the liquid flow area 111 of the support frame 11 corresponding to the layer of filter screen, and move to the next layer of filter screen for further filtration to obtain high-purity filtrate as a stand-by sample, or move to the storage tank 140 to participate in other subsequent operation links.

[0044] Please refer to Figure 4 , Figure 5 and Figure 6 In some embodiments, the support frame 11 is provided with at least one limiting groove 112, and the pressed side strip 130 is provided with at least one limiting protrusion 121. When the pressed side strip 130 is connected with the support frame 11, a limiting protrusion 121 is correspondingly clamped in a limiting groove 112, so that the connection between the supporting frame 11 and the pressed side strip 130 is more stable through the clamping connection between the limiting protrusion 121 and the limiting groove 112, thereby improving the fixing effect of the filter assembly 1 on the filter screen.

[0045] Among them, in some embodiments, the support frame 11 is provided with at least one limiting protrusion 121, and the pressed side strip 130 is provided with at least one limiting groove 112; when the pressed side strip 130 is connected with the support frame 11, a limiting protrusion 121 is correspondingly clamped in a limiting groove 112, so that through the clamping connection between the limiting protrusion 121 and the limiting groove 112, the connection stability between the support frame 11 and the pressed side strip 130 is higher, thereby improving the fixing effect of the filter assembly 1 on the filter screen.

[0046] For reference Figure 7, in some other embodiments, the pressing strip 130 is provided with at least one limiting groove 112, and the support frame 11 is provided with at least one limiting protrusion 121. When the pressing strip 130 is cooperatively connected with the support frame 11, a limiting protrusion 121 is correspondingly clamped in a limiting groove 112 to realize the connection between the pressing strip 130 and the support frame 11.

[0047] Reference may also be made to Figure 8 , in still some other embodiments, the pressing strip 130 is provided with both a limiting groove 112 and a limiting protrusion 121. Correspondingly, the support frame 11 is provided with both a limiting protrusion 121 and a limiting groove 112. When the pressing strip 130 is cooperatively connected with the support frame 11, a limiting protrusion 121 is correspondingly clamped in a limiting groove 112 to realize the connection between the pressing strip 130 and the support frame 11.

[0048] In some embodiments, the limiting protrusion 121 and the limiting groove 112 are in interference fit to enhance the connection strength between the pressing strip 130 and the support frame 11, so as to further enhance the fixing effect of the filter assembly 1 on the filter screen.

[0049] In some embodiments, to realize the interference fit between the limiting protrusion 121 and the limiting groove 112, the pressing strip 130 can be set as an elastic member or a soft plastic part. In this way, through the deformation effect of the pressing strip 130 itself, no matter whether the limiting protrusion 121 or the limiting groove 112 is provided on the pressing strip 130, when the pressing strip 130 is connected to the support frame 11, the limiting protrusion 121 or the limiting groove 112 can generate certain deformation to enter the corresponding limiting groove 112 or accommodate the corresponding limiting protrusion 121. In this way, the technical effect of the above-mentioned interference fit between the limiting protrusion 121 and the limiting groove 112 is realized.

[0050] Please refer to Figure 3 and Figure 4 , in some embodiments, the support frame 11 includes at least one frame bar 116. At least one pressing strip 130 is correspondingly connected to a frame bar 116. The limiting protrusion 121 is provided on one of the opposite surfaces of the frame bar 116 and the pressing strip 130, and the limiting groove 112 is provided on the other of the opposite surfaces of the frame bar 116 and the pressing strip 130. The filter screen is clamped between the pressing strip and the frame bar 116. In this way, the filter screen can be fixed to the filter assembly 1.

[0051] Please refer to Figure 3, Further, in some embodiments, the support frame 11 includes a plurality of frame bars 116, and the plurality of frame bars 116 are connected end to end in sequence. In some embodiments, each frame bar 116 is correspondingly provided with a pressing strip 130, and the plurality of pressing strips 130 are connected end to end to form a pressing frame 13. Among them, at least one pressing strip 130 includes a first pressing part 1311 and a second pressing part 1312 that are slidably connected. By changing the sliding connection position of the first pressing part 1311 and the second pressing part 1312, the length of the pressing strip 130 can be changed.

[0052] For the convenience of the description of subsequent embodiments, the pressing strip 130 is divided into a first pressing strip 131 and a second pressing strip 132. Among them, the first pressing strip 131 includes a first pressing part 1311 and a second pressing part 1312 that are slidably connected. The first pressing strip 131 and the second pressing strip 132 cooperate to form a pressing frame 13.

[0053] Specifically, the first pressing part 1311 and the second pressing part 1312 can adjust the relative position relationship between the two through relative sliding. Thus, the length of the first pressing strip 131 can be adjusted. That is, before the pressing frame 13 is connected to the support frame 11, the first pressing part 1311 and the second pressing part 1312 can be adjusted to slide towards each other to reduce the length of the first pressing strip 131, and the other pressing strips 130 are correspondingly bent and deformed. In this way, the pressing frame 13 can temporarily reduce its own volume through its local deformation, so as to reduce the interference suffered by the pressing frame 13 during the movement to the frame bar 116, and enable the pressing frame 13 to move to the frame bar 116 of the support frame 11 more easily to connect the frame bar 116.

[0054] In some other embodiments, among the plurality of pressing strips 130, there are two relatively arranged first pressing strips 131. If the size of the pressing frame 13 does not match the size of the frame bar 116, the size of the two first pressing strips 131 can be adjusted (i.e., stretched or reduced) to adapt to the frame bar 116. In this way, the applicable range of the pressing frame 13 can be improved.

[0055] In the foregoing embodiments, the pressing strip 130 can be in a whole-piece form (such as the aforementioned second pressing strip 132), or in a segmented form (such as the aforementioned first pressing strip 131), or a plurality of small-sized pressing strips 130 are connected to the same frame bar 116, and the plurality of small-sized pressing strips 130 can be adjacent to each other or arranged at intervals.

[0056] Please refer to Figure 6 、 Figure 7 and Figure 8, in some embodiments, the support frame 11 includes a first connection surface 113 and a second connection surface 114, and the pressing strip 130 includes a first contact surface 122 and a second contact surface 123; when the pressing strip 130 is cooperatively connected with the support frame 11, the first connection surface 113 correspondingly connects to the first contact surface 122, and the second connection surface 114 correspondingly connects to the second contact surface 123; wherein, a limiting convex portion 121 is provided on one of the first contact surface 122 and the first connection surface 113, and a limiting groove 112 is provided on the other; a limiting convex portion 121 is provided on one of the second connection surface 114 and the second contact surface 123, and a limiting groove 112 is provided on the other. It should be understood that the filter screen is mainly clamped between the first contact surface 122 and the first connection surface 113 in the figure.

[0057] Specifically, as Figure 6 shown in the embodiment, the first connection surface 113 is provided with a limiting groove 112, and the first contact surface 122 is provided with a limiting convex portion 121. When the pressing strip 130 is cooperatively connected with the support frame 11, the first connection surface 113 correspondingly connects to the first contact surface 122 so that the limiting convex portion 121 connects to the limiting groove 112;

[0058] As Figure 7 shown in the embodiment, the second contact surface 123 is provided with a limiting groove 112, and the second connection surface 114 is provided with a limiting convex portion 121. When the pressing strip 130 is cooperatively connected with the support frame 11, the second connection surface 114 correspondingly connects to the second contact surface 123 so that the limiting convex portion 121 connects to the limiting groove 112;

[0059] As Figure 8 shown in the embodiment, the first contact surface 122 and the second connection surface 114 are provided with limiting convex portions 121, and the first connection surface 113 and the second contact surface 123 are provided with limiting grooves 112. When the pressing strip 130 is cooperatively connected with the support frame 11, the first connection surface 113 correspondingly connects to the first contact surface 122, and the second connection surface 114 correspondingly connects to the second contact surface 123 so that the limiting convex portion 121 connects to the limiting groove 112.

[0060] Among them, in the above embodiments, the setting positions of the limiting convex portion 121 and the limiting groove 112 in the same matching connection relationship can be swapped, that is, as long as the limiting convex portion 121 and the limiting groove 112 are correspondingly formed on two opposite surfaces so that the limiting convex portion 121 has a limiting groove 112 that can be correspondingly connected.

[0061] In the above embodiments, the support frame 11 is respectively provided with at least one limiting convex portion 121 or limiting groove 112 on at least two connecting surfaces. Correspondingly, the pressing edge strip 130 is provided with at least one limiting groove 112 or limiting convex portion 121 on at least two contact surfaces. In this way, the connection strength between the pressing edge strip 130 and the support frame 11 is improved, and the fixing effect of the filter assembly 1 on the filter screen is enhanced. During the filtering operation, the filter paper will not be driven to break away from the filter assembly 1 due to the movement of the specimen carried on its surface, enabling the filtering operation to be carried out effectively and smoothly.

[0062] In some other embodiments, the support frame 11 is provided with a limiting groove 112 on the first connecting surface 113, and the pressing edge strip 130 is provided with a limiting convex portion 121 on the first contact surface 122. Moreover, the protruding direction of the limiting convex portion 121 and the recessed direction of the limiting groove 112 are perpendicular to the placement plane formed by the filter screen. In this way, when the specimen moves along the placement plane formed by the filter screen, a part of the filter screen has a tendency to move along the placement plane with the specimen. The cooperation relationship between the limiting convex portion 121 and the limiting groove 112 forms a constraint force perpendicular to the placement plane on the edge of the filter screen. Thus, the filter screen is sufficient to overcome the reaction force exerted by the specimen due to its movement, and thereby is fixed to the filter assembly 1, enabling the filtering operation to proceed normally.

[0063] Please refer to Figure 3 and Figure 5 , in some embodiments, the support frame 11 includes a side frame 117. The inner wall of the side frame 117 is connected to the frame strip 116. The first connecting surface 113 and the second connecting surface 114 are provided on the surfaces of the side frame 117 and the frame strip 116 facing the pressing edge strip 130. The first contact surface 122 and the second contact surface 123 are provided on the surfaces of the pressing edge strip 130 facing the frame strip 116 and the side frame 117. In this way, the side frame 117 and the frame strip 116 can define a specimen space 119. When the filter assembly 1 participates in the filtering operation, the side frame 117 can limit the specimen to be filtered in the specimen space 119, thereby preventing the specimen from overflowing and contaminating the filter tank 110 or other components in the sample separation and extraction instrument 1000, which may affect the subsequent operations of the filter tank 110 or the sample separation and extraction instrument 1000.

[0064] Please also refer to Figure 3 、 Figure 5 and Figure 6Furthermore, in some embodiments, the support frame 11 also includes a support keel 118, and the side frame 117 is circumferentially arranged around the periphery of the support keel 118 to jointly limit the specimen space 119 with the support keel 118, and the support keel 118 forms a liquid-passing area 111; the pressed edge strip 130 is provided with a transition slope 125, and along the width direction of the pressed edge strip 130, the transition slope 125 is inclined from one side of the pressed edge strip 130 to the other side; when the filter screen is clamped between the pressed edge strip 130 and the support frame 11, the side frame 117 is transitionally connected to the filter screen through the transition slope 125.

[0065] Since the width direction mentioned above refers to the width direction of the pressed edge strip 130, and in the drawings, due to the different positions of the pressed edge strip 130, its width direction is different relative to the support frame 11. In order to more clearly describe the above embodiment, Figure 5 and Figure 6 The first direction of the filter assembly 1 is marked accordingly. In the figure, the width directions of two pressed edge strips 130 are parallel to the first direction, so the two pressed edge strips 130 are selected to exemplarily illustrate the above embodiment.

[0066] First, the side frame 117 can form a certain annular limiting effect to prevent the specimen from flowing out of the specimen space 119 and contaminating other components; second, please refer to Figure 6 Because the specimens are piled up to a certain height and may move or flow due to gravity or viscosity, when part of the specimens temporarily overflow the pressed edge strip 130, the part of the specimens can flow back or move back to the filter under the guidance of the transition slope 125 so that they can be filtered by the filter instead of being stuck on the pressed edge strip 130. In this way, the amount of specimens participating in the filtration is guaranteed to a certain extent, and the reference degree of the standby samples collected by the filtration due to incomplete participation of the specimens is reduced, thereby avoiding affecting the analysis results of subsequent analysis operations.

[0067] Please refer to Figure 6 , Figure 7 and Figure 8 Further, in some combined embodiments, the support frame 11 includes a frame bar 116, a support keel 118 and a side frame 117, wherein the frame bar 116 and the support keel 118 form a support plane for supporting the filter screen, and the side frame 117 is circumferentially arranged around the outer periphery of the support plane to jointly limit the specimen space 119 with the frame bar 116 and the support keel 118, and the first connecting surface 113 is formed on the frame bar 116, and the second connecting surface 114 is formed on the side frame 117; the aforementioned limiting groove 112 and / or limiting protrusion 121 can be formed on the first connecting surface 113, and can also be formed on the second connecting surface 114, that is, you can first refer to Figure 6 and Figure 7In some embodiments, the first connecting surface 113 or the second connecting surface 114 forms a limiting groove 112 and / or a limiting protrusion 121; in other embodiments, reference may be made to Figure 8 The first connecting surface 113 and the second connecting surface 114 simultaneously form a limiting groove 112 and / or a limiting protrusion 121, which can be determined according to the actual product requirements.

[0068] Please refer to Figure 3 In some embodiments, the pressed side strip 130 is provided with a pick-up recess 126 , so that the operating object can separate the pressed side strip 130 from the support frame 11 by applying the pick-up recess 126 , so as to facilitate the separation of the pressed side strip 130 from the support frame 11 .

[0069] Furthermore, in some instances, since the support frame 11 may have certain connecting holes and connecting parts, in order to reduce the mutual interference between the pressed side strip 130 and the connecting holes and connecting parts, the pressed side strip 130 is adaptively provided with a certain avoidance structure to strengthen the adaptive connection between the pressed side strip 130 and the support frame 11.

[0070] In some embodiments, the sample separation and extraction instrument 1000 is an intestinal bacteria separation and extraction instrument to improve the filtering effect of the intestinal bacteria separation and extraction instrument. It should be understood that the sample separation and extraction instrument 1000 can also be a purification instrument, screening instrument, or other instrument that requires filtering operations.

[0071] It should be noted that the filter assembly 1 in the above embodiments, as well as the aforementioned filter tank 110 and filter 100 can be but are not limited to being used in the aforementioned sample separation and extraction instrument 1000, and can also be applied to other products that can be adapted for the application, such as purification instruments, screening instruments, etc.

[0072] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A filtering component for fixing a filter screen, characterized in that, Comprising: A support frame, on which the filter screen is placed, and a liquid passing area is formed inside the support frame. The liquid passing through the filter screen enters the next operation link through the liquid passing area; And A pressing edge strip, which is connected to the support frame to clamp the filter screen between the pressing edge strip and the support frame.

2. The filter assembly according to claim 1, wherein At least one limiting groove is formed on the support frame, and at least one limiting protrusion is provided on the pressing edge strip, or at least one limiting protrusion is formed on the support frame, and at least one limiting groove is provided on the pressing edge strip; When the pressing edge strip is cooperatively connected with the support frame, one limiting protrusion is correspondingly clamped in one limiting groove.

3. The filter component according to claim 2, wherein The limiting protrusion and the limiting groove are in interference fit.

4. The filter assembly according to claim 2, wherein The support frame includes at least one frame strip, and at least one pressing edge strip is correspondingly connected to one frame strip. The limiting protrusion is arranged on one of the opposite surfaces of the frame strip and the pressing edge strip, and the limiting groove is arranged on the other of the opposite surfaces of the frame strip and the pressing edge strip. The filter screen is clamped between the pressing edge strip and the frame strip.

5. The filter assembly according to claim 4, wherein The support frame includes a plurality of frame strips, and the plurality of frame strips are sequentially connected end to end; one frame strip is correspondingly connected to one pressing edge strip, and the plurality of pressing edge strips are connected end to end to form a pressing border. Among them, at least one pressing edge strip includes a first pressing part and a second pressing part connected in a sliding manner. By changing the relative positions of the first pressing part and the second pressing part, the length of the pressing edge strip is changed.

6. The filter component according to claim 4, wherein The support frame includes a first connection surface and a second connection surface, and the pressing edge strip includes a first contact surface and a second contact surface; when the pressing edge strip is cooperatively connected with the support frame, the first connection surface is correspondingly connected to the first contact surface, and the second connection surface corresponds to the second contact surface; among them, one of the first contact surface and the first connection surface is provided with the limiting protrusion, and the other is provided with the limiting groove. One of the second connection surface and the second contact surface is provided with the limiting protrusion, and the other is provided with the limiting groove.

7. The filter assembly according to claim 6, wherein The support frame includes a side frame, the inner wall of the side frame is connected to the frame strip, the first connection surface and the second connection surface are respectively arranged on the surfaces of the side frame and the frame strip facing the pressing edge strip, and the first contact surface and the second contact surface are respectively arranged on the surfaces of the pressing edge strip facing the frame strip and the side frame.

8. The filter assembly according to claim 7, wherein The support frame includes a support keel, and the side frame is circumferentially wound around the periphery of the support keel to jointly limit a specimen space with the support keel, and the support keel forms the liquid passing area; The pressing edge strip is provided with a transition inclined surface, and along the width direction of the pressing edge strip, the transition inclined surface inclines from one side of the pressing edge strip to the other side; when the filter screen is clamped between the pressing edge strip and the support frame, the side frame is transitionally connected to the filter screen through the transition inclined surface.

9. The filtering component according to claim 1, wherein The pressing edge strip is provided with a taking concave part to facilitate the separation of the pressing edge strip from the support frame.

10. A filter tank, characterized in that, Comprising: A tank body, inside which a filtering cavity is formed; And The filter assembly as described in any one of claims 1 to 9, wherein the filter assembly is placed in a filter cavity.

11. A filter, characterized in that, It includes a mixing tank, a storage tank and a filtering tank as described in claim 10 which are arranged in sequence. When the filter is in operation, a specimen is first added to the mixing tank. After pretreatment in the mixing tank, the specimen is moved to the filtering tank and filtered in the filtering tank to form a standby sample that enters the storage tank.

12. A sample separation and extraction instrument, characterized in that, include: frame; The filter according to claim 11, wherein the mixing tank, the filtering tank and the storage tank are all connected to the frame; A material collection component is connected to the frame, and is used to collect the samples to be used output by the storage tank.

13. The sample separation and extraction instrument according to claim 12, characterized in that, The sample separation and extraction instrument is an enterobacteria separation and extraction instrument.

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