PBS collection solution injection feces sampler
By introducing PBS collection liquid injection connector and vacuum tube drop bucket design in feces sampler, the problems of incomplete filtration of impurities and inconvenient sample storage in traditional feces collectors are solved, and more efficient feces collection and storage are achieved, improving detection results accuracy and ease of operation.
Patent Information
- Application Number
- CN201911013935.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-10-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2039-10-24
AI Technical Summary
It is difficult for traditional fecal collectors to effectively filter impurities when used, resulting in inaccurate detection results, and inconvenient injection of PBS collection liquid and storage of samples.
A PBS collecting liquid injection feces sampler was designed, including a test tube, a filter and a sample collection tube. The test tube is equipped with a PBS collecting liquid injection connector, which realizes liquid sealing through rubber closure. The sample collection tube is designed with a vacuum tube and a drip bucket. , ensure that the sample is sealed and stored.
It achieves more convenient operation, more thorough sample filtration, more accurate detection results, long sample storage time, and avoids sample leakage and unclear operation.
Smart Images
Figure CN110806332B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of biological detection equipment, more specifically to a feces sampler. Background Art
[0002] Stool testing is of great significance for the early screening of many diseases. By testing the hemoglobin in the stool, it is possible to screen whether the patient has a gastrointestinal bleeding disease. Therefore, stool testing has become a routine item for disease detection in many medical institutions.
[0003] Traditional feces collectors have only two parts: a test tube and a sealing cover. The sealing cover is equipped with a collection spoon, and the upper end of the sealing cover can be opened. When using, the collected material is placed in the test tube for dilution, and the upper end of the sealing cover is opened to drop the sample to be tested onto the test strip. This often results in impurities in the test tube not being filtered out, thus affecting the test results.
[0004] In order to solve the above technical problems, people have improved and designed feces samplers, such as the "Disposable Feces Centrifugal Collector" disclosed in the Chinese patent document with the number CN201621336000.X (authorization publication number CN206208562U), whose main structure is: including a test tube, a filter and a dripping funnel, the test tube is connected to the dripping funnel through the filter; the filter comprises a two-way connecting component, a collecting rod and a collecting spoon, the end of the two-way connecting component connected to the test tube is provided with a collecting rod, and the end of the collecting rod is provided with a collecting spoon; the inside of the two-way connecting component and the collecting rod are hollow, and the collecting rod has an array of micropores, the micropores are connected to the two-way connecting component and the inside of the collecting rod, and the other end of the two-way connecting component is connected to the dripping funnel. However, the feces sampler has the following defects: 1. When in use, the PBS collection solution is poured into the test tube in advance, and then the test tube is partially tilted, and the collection spoon is inserted into the test tube and then screwed together; during the operation, the test tube cannot be tilted too much, otherwise it is easy to cause the PBS collection solution to pour out, and if the tilt angle is not large enough, the feces in the collection spoon are easy to fall, especially watery feces, which brings inconvenience to the operation. 2. The feces centrifugal collector uses a drip bucket to drip the sample into the detection port to complete the detection, and it is not possible to achieve a good separate storage of the sample. Summary of the invention
[0005] Purpose of the invention: To overcome the defects of the prior art, the present invention provides a PBS collecting liquid injection type feces sampler, which can realize that the collector is pre-connected with a test tube and then the PBS collecting liquid is placed therein, and has the advantages of being easy and neat to operate.
[0006] To achieve the above object, the present invention provides the following technical solutions:
[0007] A PBS collecting liquid injection type stool sampler comprises a test tube, a filter and a sample collecting tube, the filter comprises a two-way connecting component, a collecting rod and a collecting spoon, one end of the two-way connecting component connected to the test tube is provided with a collecting rod, the end of the collecting rod is provided with a collecting spoon, the two-way connecting component and the collecting rod are both hollow inside, the collecting rod is provided with an array of micropores, the micropores are connected to the two-way connecting component and the inside of the collecting rod, the other end of the two-way connecting component is connected to the sample collecting tube, and the characteristic is that: the test tube is provided with a PBS collecting liquid injection joint, the PBS collecting liquid injection joint is connected to the tube cavity of the test tube, and the PBS collecting liquid injection joint is provided with a rubber sealing plug.
[0008] By adopting the above technical solution, when in use, after the collection spoon completes feces collection, the filter is connected to the test tube, and then the PBS collection liquid is injected into the test tube through the PBS collection liquid injection joint. After the PBS collection liquid is injected, the PBS collection liquid injection joint is closed with a rubber sealing plug; in this way, during the process of connecting the test tube and the filter, the collection spoon can be fully taken care of, which has the advantage of easy operation.
[0009] Preferably, the PBS collecting liquid injection joint is located on the circumferential wall of the test tube, the PBS collecting liquid injection joint corresponds to the spoon mouth position of the collection spoon, the PBS collecting liquid injection joint includes an inner convex part protruding from the circumferential side wall of the test tube, and the inner convex part has a cavity, and the rubber sealing plug includes an annular rubber ring, which is sleeved outside the test tube, and a plug is integrally formed on the rubber ring, and the plug is fixedly embedded in the cavity of the inner convex part. Under this structural design, the syringe pierces the plug, and the PBS collecting liquid is injected into the test tube through the syringe. The PBS collecting liquid injection joint corresponds to the spoon mouth position of the collection spoon, and has the function of flushing the sample in the collection spoon to ensure that the sample is fully mixed with the PBS collecting liquid; after the PBS collecting liquid is injected, the needle of the syringe is pulled out, and the rubber sealing plug heals itself and re-seals. Under the structure of the rubber sealing plug, it can ensure that it is firmly and reliably combined with the test tube, and the PBS collecting liquid injection joint structure has the advantages of neat and beautiful appearance and convenient use.
[0010] Preferably, the sample collection tube includes a drip bucket, the head end of the drip bucket is a drip nozzle, the drip nozzle of the drip bucket is covered with a closing cap, the tail end of the drip bucket is provided with a sealing rubber, the drip bucket is a vacuum tube, the hollow cavity of the two-way connecting component is provided with a puncture needle tube, the puncture needle tube is located in the middle of the hollow cavity of the two-way connecting component, the two-way connecting component has a sleeve tube section that is sleeved on the outside of the puncture needle tube, the tail end of the drip bucket can be guided and inserted into the sleeve tube section, and the puncture needle tube can pierce the sealing rubber plug to realize the connection between the inner cavity of the drip bucket and the hollow cavity of the two-way connecting component. Under this structural design, the tail end of the drip bucket is guided to be inserted into the sleeve tube section, and the puncture needle tube passes through the sealing rubber plug to realize the connection between the two-way connecting component and the vacuum tube, so that the test sample obtained after filtration can be placed in the drip bucket. After the sampling is completed, the drip bucket is removed, and the rubber sealing plug closes automatically to achieve sealing, so as to achieve sealed preservation of the sample. The drip bucket adopts a vacuum tube design, which has the advantages of long sample storage time and good effect; in addition, the two-way connecting component adopts a puncture needle tube design, and the sample is not prone to dripping under the wider mouth design. Moreover, since the drip bucket is a vacuum tube and the tail end is a sealing rubber plug design, when the drip bucket is separated, it can better avoid sample leakage and it is cleaner. The tail end of the drip bucket can be guided and inserted into the sleeve tube section, and the operation is more convenient.
[0011] Preferably, a movable guide thread is provided in the sleeve tube section, and the movable guide thread is screwed with a guide sealing plug, the guide sealing plug includes a nut seat with an external thread, the external thread of the nut seat corresponds to the movable guide thread, the nut seat has an axially through-going through cavity, a rubber block is embedded in the through-going cavity of the nut seat, a dovetail connecting block is provided at the tail end of the nut seat, and a dovetail connecting groove is provided at the tail end of the drip bucket, the dovetail connecting groove has a connecting port that passes through the circumferential side of the drip bucket, the guide sealing plug can be rotated at the sleeve tube section port to allow the dovetail connecting block to extend out of the sleeve tube section port so that the dovetail connecting groove of the drip bucket can be sleeved and detached from the dovetail connecting block, and the guide sealing plug is located at the sleeve tube section port to form a puncture needle tube shielded in the sleeve tube section. Under this structural design, the guide plug is connected to the drip bucket via the dovetail connecting block and the dovetail connecting groove. The guide sealing plug can be rotated to move along the thread by rotating the drip bucket, so that the puncture needle tube can puncture the rubber plug of the guide sealing plug and the sealing rubber plug. Before the sample centrifugation operation, the rubber plug of the guide sealing plug can seal the puncture needle tube. After the sample is separated, the above operation is completed to introduce the sample into the vacuum tube. After the sample is collected, the drip bucket is rotated to screw the guide sealing plug to the port of the sleeve tube section to seal the puncture needle tube again and detach the drip bucket, thereby ensuring safety and clean and hygienic operation.
[0012] Preferably, an inner extension limit ring is provided at the end of the sleeve tube section, the inner ring hole of the inner extension limit ring cooperates with the outer tube wall of the drip bucket for guiding, and the inner extension limit ring cooperates with the guide sealing plug for axial limiting. Under this structural design, the inner extension limit ring prevents the guide sealing plug from being screwed out of the sleeve tube section, thereby achieving reliable blocking of the puncture needle tube, and the inner extension limit ring guides the drip bucket.
[0013] Preferably, an anti-puncture baffle ring is provided at the tail end of the drip bucket, and the anti-puncture baffle ring of the drip bucket cooperates with the stopper of the sleeve tube section to ensure that the axial part of the tail end of the drip bucket is moved into the inner ring hole of the inner extension limit ring for positioning and the sealing rubber plug is not pierced by the puncture needle tube. The anti-puncture baffle ring is removably arranged at the tail end of the drip bucket, and after the anti-puncture baffle ring is removed, the drip bucket axially moves into the sleeve tube section, thereby ensuring that the puncture needle tube pierces the sealing rubber plug. With this structural design, in the initial stage of use, under the action of the anti-puncture baffle ring, the tail end of the drip bucket can be screwed into the sleeve tube section to realize reliable positioning of the drip bucket on the two-way connector, and at the same time, the puncture needle tube cannot pierce the sealing rubber plug, thereby ensuring the initial mixing and centrifugal operations. After the above operations are completed, the anti-puncture baffle ring is removed, so that the drip bucket can continue to move into the sleeve tube section until the puncture needle tube pierces the sealing rubber plug, thereby realizing the sample storage operation; the anti-puncture baffle ring realizes the positioning function during the operation, thereby making the operation simpler and more reliable; at the same time, removing the anti-puncture baffle ring indicates that the drip bucket is in use, thereby preventing the drip bucket from being activated again.
[0014] Preferably, the anti-puncture retaining ring comprises a retaining ring body with a fracture, the fracture constituting a guide opening for removing the retaining ring body, one end of the fracture of the retaining ring body having a removing gripping portion, and one axial end of the retaining ring body being provided with a plurality of circumferentially distributed connecting convex points, the connecting convex points connecting the retaining ring body and the drip bucket. Under this structural design, the anti-puncture retaining ring has a simple structure and is easy and convenient to remove.
[0015] Preferably, a funnel-shaped needle tube seat for fixing the puncture needle tube is provided in the bidirectional connection component, the liquid inlet port of the puncture needle tube is located at the bottom of the needle tube seat, and a filter membrane is provided on the side of the needle tube seat facing the collection rod. Under this structural design, the funnel-shaped needle tube seat facilitates the collection and outflow of liquid, and the filter membrane can achieve secondary blocking of fecal residue, thereby improving the filtering effect.
[0016] Preferably, the filter membrane is funnel-shaped, and a liquid storage space is provided between the filter membrane and the needle tube seat. This structural design has the advantage of a large filtering area, and the liquid storage space can store the filtered liquid, ensuring that the vacuum tube can reliably absorb the sample.
[0017] Preferably, the end of the dovetail connection groove opposite to the connection port extends beyond the axial center point of the sealing rubber plug, and a positioning pit corresponding to the axial center point of the sealing rubber plug is provided at the bottom of the dovetail connection groove, and a slidable sealing push block is provided in the dovetail connection groove, and a convex point is provided at the bottom of the sealing push block, and the sealing push block can slide until the convex point extends into the positioning pit and presses against the axial center point of the sealing rubber plug. Under this structural design, after the sampling of the drip bucket is completed, the sealing push block can be slid, and the convex point of the sealing push block is placed in the positioning pit, pressing against the axial center point of the sealing rubber plug, that is, pressing against the puncture point of the sealing rubber plug, so that the sealing rubber plug is deformed and a reliable puncture point seal is achieved.
[0018] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a stereoscopic diagram of a PBS collection liquid injection type feces sampler according to a specific embodiment of the present invention;
[0020] Figure 2 It is an exploded view of a PBS collection liquid injection type feces sampler according to a specific embodiment of the present invention;
[0021] Figure 3 This is a schematic diagram of the structure of a PBS collection liquid injection type feces sampler according to a specific embodiment of the present invention;
[0022] Figure 4 An exploded view of a filter according to a specific embodiment of the present invention;
[0023] Figure 5 This is an exploded view of a sample collection tube according to a specific embodiment of the present invention;
[0024] Figure 6 for Figure 3 A partial enlarged view of part A;
[0025] Figure 7 This is a schematic diagram of a test tube structure according to a specific embodiment of the present invention;
[0026] Figure 8 It is a schematic structural diagram of another embodiment of the tail portion of the drip funnel of the present invention. DETAILED DESCRIPTION
[0027] See attached Figures 1 to 7The present invention discloses a PBS collecting liquid injection type stool sampler, comprising a test tube 1, a filter 2 and a sample collecting tube 3, the filter 2 comprising a two-way connecting component 21, a collecting rod 22 and a collecting spoon 23, the two-way connecting component 21 is provided with a collecting rod 22 at one end connected to the test tube 1, the collecting rod 22 is provided with a collecting spoon 23 at the end of the collecting rod 22, the two-way connecting component 21 and the collecting rod 22 are both hollow inside, the collecting rod 22 is provided with an array of micropores 221, the micropores 221 are connected to the inside of the two-way connecting component 21 and the collecting rod 22, the other end of the two-way connecting component 21 is connected to the sample collecting tube 3, the test tube 1 is provided with a PBS collecting liquid injection joint 11, the PBS collecting liquid injection joint 11 is connected to the tube cavity of the test tube 1, and the PBS collecting liquid injection joint 11 is provided with a rubber sealing plug 12. When in use, after the collection spoon 23 completes the feces collection, the filter 2 is connected to the test tube 1, and then the PBS collecting liquid is injected into the test tube 1 through the PBS collecting liquid injection joint 11. After the PBS collecting liquid is injected, the PBS collecting liquid injection joint 11 is sealed with the rubber sealing plug 12; in this way, during the connection process between the test tube 1 and the filter 2, the collection spoon 23 can be fully taken care of, which has the advantage of convenient operation.
[0028] Furthermore, the PBS collecting liquid injection connector 11 is located on the circumferential wall of the test tube 1, and the PBS collecting liquid injection connector 11 corresponds to the spoon mouth position of the collection spoon 23. The PBS collecting liquid injection connector 11 includes an inner convex portion 111 protruding from the inner side wall of the test tube 1, and the inner convex portion 111 has a cavity 112. The rubber sealing plug 12 includes an annular rubber ring 121, and the rubber ring 121 is sleeved on the outside of the test tube 1. A plug 122 is integrally formed on the rubber ring 121, and the plug 122 is fixedly embedded in the cavity of the inner convex portion 111. The syringe pierces the plug 122, and a puncture indication point is marked on the outer side of the plug 122. The PBS collecting solution is injected into the test tube 1 through the syringe. The PBS collecting solution injection joint 11 corresponds to the spoon mouth position of the collection spoon 23, which has the function of flushing the sample in the collection spoon 23 to ensure that the sample and the PBS collecting solution are fully mixed. After the PBS collecting solution is injected, the needle tube of the syringe is pulled out, and the rubber sealing plug 12 heals by itself to re-seal. Under the structure of the rubber sealing plug 12, it can ensure that it is firmly and reliably combined with the test tube 1. Under the structure of the PBS collecting solution injection joint 11, the PBS collecting solution injection joint 11 does not protrude from the outside of the test tube 1, which has the advantages of neat and beautiful appearance and convenient use.
[0029] In this specific embodiment, the sample collection tube 3 includes a drip bucket, the head end of the drip bucket is a drip nozzle 31, and the drip nozzle 31 of the drip bucket is covered with a closure cap 32, wherein the closure cap 32 includes a cap body 321 with an internal thread, the cap body 321 is threadedly fitted on the drip bucket 3, and a conical rubber plug 322 is provided at the bottom center of the cap body 321, and the conical rubber plug 322 is blocked in the drip port 311 of the drip bucket 3 to achieve sealing. In order to achieve vacuum storage of the sample, the drip bucket 3 adopts a vacuum tube design, and the vacuum tube tail A sealing rubber plug 33 is provided in the port, a needle tube seat 211 is provided in the hollow cavity of the two-way connecting component 21, a puncture needle tube 212 is provided on the needle tube seat 211, and the puncture needle tube 212 is located in the middle of the hollow cavity of the two-way connecting component 21, and the two-way connecting component 21 has a sleeve tube section 213 that is sleeved on the outside of the puncture needle tube 212, the tail end of the drip bucket 3 can be guided and inserted into the sleeve tube section 213, and the puncture needle tube 212 can pierce the sealing rubber plug 33 to realize the connection between the inner cavity of the drip bucket 3 and the hollow cavity of the two-way connecting component 21. The tail end of the drip bucket 3 is guided to be inserted into the sleeve tube section 213, and the puncture needle tube 212 passes through the sealing rubber plug 33 to realize the connection between the two-way connecting component 21 and the vacuum tube, so that the test sample obtained after filtration is placed in the drip bucket 3. After the sampling is completed, the drip bucket 3 is removed, and the rubber sealing plug closes automatically to achieve sealing, so as to achieve the sealed preservation of the sample. The drip bucket 3 adopts a vacuum tube design, which has the advantages of long sample storage time and good effect; in addition, the two-way connecting component 21 adopts the puncture needle tube 212 design. Under the wider mouth design, the sample is not easy to drip, and because the drip bucket 3 is a vacuum tube and the tail end is designed with a sealing rubber plug 33, when the drip bucket 3 is separated, it can better avoid sample leakage and it is cleaner. The tail end of the drip bucket 3 can be guided and inserted into the sleeve tube section 213, which is more convenient to operate.
[0030] The sleeve tube section 213 is provided with a movable guide thread 2131, and the movable guide thread 2131 is screwed with a guide seal plug 214, and the guide seal plug 214 includes a nut seat 2141 with an external thread, and the external thread of the nut seat 2141 corresponds to the movable guide thread 2131. The nut seat 2141 has an axially through-going through cavity, and a rubber block 2142 is embedded in the through-going cavity of the nut seat 2141. The tail end of the nut seat 2141 is provided with a dovetail connection block 2143, a dovetail connection groove 34 is provided at the tail end of the drip bucket 3, and the dovetail connection groove 34 has a connection port that passes through the circumferential side of the drip bucket 3, and the guide sealing plug 214 can be rotated at the end of the sleeve tube section 213 to allow the dovetail connection block 2143 to extend out of the end of the sleeve tube section 213 so that the dovetail connection groove 34 of the drip bucket 3 can be sleeved and detached from the dovetail connection block 2143, and the guide sealing plug 214 is located at the end of the sleeve tube section 213 to block the puncture needle tube 212 in the sleeve tube section 213. The guide plug is connected to the drip bucket 3 via the dovetail connection block 2143 and the dovetail connection groove 34. The guide plug 214 can be rotated to move along the thread by rotating the drip bucket 3, so that the puncture needle tube 212 punctures the rubber plug 2142 and the sealing rubber plug 33 of the guide plug 214. Before the sample centrifugation operation, the rubber plug 2142 of the guide plug 214 seals the puncture needle tube 212. After the sample is separated, the above operation is completed to achieve the introduction of the sample into the vacuum tube. After the sample is collected, the drip bucket 3 is rotated to rotate the guide plug 214 to the port of the sleeve tube section 213, so as to seal the puncture needle tube 212 again and detach the drip bucket 3, thereby ensuring safety and clean and hygienic operation. The threaded screwing action can make the puncture and withdrawal process of the puncture needle tube 212 smoother. Of course, as a feasible solution of the present invention, an external thread can be directly designed at the tail end of the drip bucket 3 to cooperate with the sleeve tube section 213, but there is a direct exposure of the puncture needle tube 212, which is easy to cause safety hazards in the later waste treatment after being discarded. Figure 8As shown, as another embodiment of the present invention, in order to further ensure the sealing of the sealing rubber plug on the puncture point, the end of the dovetail connecting groove 34 opposite to the connecting port extends over the axial center point of the sealing rubber plug 33 (i.e., the puncture point of the sealing rubber plug 33), and a positioning pit 341 corresponding to the axial center point of the sealing rubber plug 33 is provided at the bottom of the dovetail connecting groove 34, and a slidable sealing push block 36 is provided in the dovetail connecting groove 34, and a protrusion 361 is provided at the bottom of the sealing push block 36, and the sealing push block 36 can slide until the protrusion 361 extends into the positioning pit 341 and presses against the axial center point of the sealing rubber plug 33. The sealing push block 36 and the dovetail connecting groove 34 have a movable gap in the height direction, and the protrusion 361 can be pressed and buckled into the positioning pit 341. The buckling of the protrusion 361 and the positioning pit 341 is an interference fit. Under this structural design, after the drip bucket sampling is completed, the sealing push block can be slid to place the protrusion of the sealing push block into the positioning pit, pressing the axial center point of the sealing rubber plug, that is, pressing the puncture point of the sealing rubber plug, thereby deforming the sealing rubber plug to achieve a reliable puncture point seal.
[0031] In this specific embodiment, an inner extension limit ring 215 is provided at the end of the sleeve tube section 213. The inner extension limit ring 215 is integrally formed with the sleeve tube section 213. The inner ring hole of the inner extension limit ring 215 cooperates with the outer tube wall of the drip bucket 3. The inner extension limit ring 215 cooperates with the axial limit of the guide seal plug 214. Under this structural design, the inner extension limit ring 215 prevents the guide seal plug 214 from being screwed out of the sleeve tube section 213, thereby achieving reliable blocking of the puncture needle tube 212. In addition, the inner extension limit ring 215 guides the drip bucket 3.
[0032] In order to facilitate the processing and assembly of the filter 2, the two-way connecting component 21 is formed by assembling multiple components. The two-way connecting component 21 includes a first tubular component 21-1, a needle tube component 21-2 and a sleeve component 21-3. The first tubular component 21-1 is integrally formed with the collection rod 22. The first tubular component 21-1 has an external thread 21-11 for threading the test tube 1. The first tubular component 21-1 extends from the other end connected to the collection rod 22 with a plug-in step 21-12. 21-2 includes a cylindrical tube 21-21, a needle tube seat 211 is formed in the cylindrical tube 21-21, and the puncture needle is fixed on the needle tube seat 211. The cylindrical tube 21-21 is sleeved on the plug-in step portion 21-12 of the first cylindrical component 21-1. The sleeve component 21-3 includes a sleeve component body 21-31 formed in one piece with a sleeve tube section 213 and an inner extension limit ring 215. The tail end of the sleeve component body 21-31 extends with an inner step sleeve 21-32 sleeved outside the cylindrical tube 21-21. This design facilitates the processing and molding of each part. The guide sealing plug 214 can be pre-installed in the sleeve tube section 213 and screwed at the port of the sleeve tube section 213 to allow the dovetail connection block 2143 to extend out of the sleeve tube section 213 port.
[0033] In order to prevent the vacuum tube from failing due to the drip bucket 3 being screwed in by mistake, the following structural design is adopted: an anti-puncture baffle ring 35 is provided at the tail end of the drip bucket 3; the anti-puncture baffle ring 35 of the drip bucket 3 cooperates with the stopper of the sleeve tube section 213 to ensure that the axial part of the tail end of the drip bucket 3 is moved into the inner ring hole of the inner extension limit ring 215 for positioning and the sealing rubber plug 33 is not pierced by the puncture needle tube 212; the anti-puncture baffle ring 35 is removably arranged at the tail end of the drip bucket 3, and after the anti-puncture baffle ring 35 is removed, the drip bucket 3 is axially moved into the sleeve tube section 213, thereby ensuring that the puncture needle tube 212 pierces the sealing rubber plug 33. In the initial stage of use, under the action of the anti-puncture baffle ring 35, the tail end part of the drip bucket 3 can be screwed into the sleeve tube section 213 to realize that the drip bucket 3 is reliably positioned on the two-way connector. At the same time, the puncture needle tube 212 cannot pierce the sealing rubber plug 33, ensuring the initial mixing and centrifugation operations. After the above operations are completed, the anti-puncture baffle ring 35 is removed, so that the drip bucket 3 can continue to move into the sleeve tube section 213 until the puncture needle tube 212 pierces the sealing rubber plug 33, thereby realizing the sample storage operation; the anti-puncture baffle ring 35 realizes the positioning during operation, thereby making the operation simpler and more reliable; at the same time, removing the anti-puncture baffle ring 35 indicates that the drip bucket 3 is in use, thereby preventing the drip bucket 3 from being activated again.
[0034] The anti-puncture retaining ring 35 comprises a retaining ring body 352 with a fracture 351, the fracture 351 constitutes a guide opening for removing the retaining ring body 352, one end of the fracture 351 of the retaining ring body 352 has a removal gripping portion 3521, the removal gripping portion 3521 can be appropriately designed with anti-slip and warping designs to facilitate better gripping of the removal gripping portion 3521, and one axial end of the retaining ring body 352 is provided with a plurality of circumferentially distributed connection convex points 353, the connection convex points 353 connect the retaining ring body 352 and the drip bucket 3. The anti-puncture retaining ring 35 has a simple structure and is easy and convenient to remove.
[0035] In addition, a funnel-shaped needle tube seat 211 is provided in the bidirectional connection component 21 for fixing the puncture needle tube 212, the liquid inlet port of the puncture needle tube 212 is located at the bottom of the needle tube seat 211, and a filter membrane 216 is provided on the side of the needle tube seat 211 facing the collection rod 22. The funnel-shaped needle tube seat 211 facilitates the gathering and outflow of liquid, and the filter membrane 216 can achieve secondary blocking of feces residue, thereby improving the filtering effect.
[0036] The filter membrane 216 is funnel-shaped, and a liquid storage space 217 is provided between the filter membrane 216 and the needle tube seat 211. The funnel-shaped filter membrane 216 has the advantage of a large filtering area, and the liquid storage space 217 can store the filtered liquid, ensuring that the vacuum tube can reliably absorb the sample.
Claims
1. A PBS collection liquid injection type stool sampler, comprising a test tube, a filter and a sample collection tube, the filter comprising a two-way connecting component, a collection rod and a collection spoon, the end of the two-way connecting component connected to the test tube is provided with a collection rod, the end of the collection rod is provided with a collection spoon, the two-way connecting component and the collection rod are both hollow inside, the collection rod has an array of micropores, the micropores are connected to the two-way connecting component and the inside of the collection rod, the other end of the two-way connecting component is connected to the sample collection tube, characterized in that: The test tube is provided with a PBS collection liquid injection joint, which is connected to the lumen of the test tube and is provided with a rubber sealing plug. The sample collection tube comprises a drip bucket, the head end of the drip bucket is a drip nozzle, the drip nozzle of the drip bucket is covered with a closing cap, the tail end of the drip bucket is provided with a sealing rubber, and the drip bucket is a vacuum tube. The hollow cavity of the two-way connecting component is provided with a puncture needle tube, the puncture needle tube is located in the middle of the hollow cavity of the two-way connecting component, the two-way connecting component has a sleeve tube section sleeved outside the puncture needle tube, the tail end of the drip bucket can be guided and inserted into the sleeve tube section, and the puncture needle tube can pierce the sealing rubber plug to realize the connection between the inner cavity of the drip bucket and the hollow cavity of the two-way connecting component, the sleeve tube section is provided with a movable guide thread, the movable guide thread is screwed with a guide sealing plug, the guide sealing plug includes a nut seat with an external thread, the external thread of the nut seat is connected to the The movable guide thread is matched correspondingly, the nut seat has an axially penetrating through cavity, a rubber block is embedded in the through cavity of the nut seat, a dovetail connection block is provided at the tail end of the nut seat, and a dovetail connection groove is provided at the tail end of the drip bucket, the dovetail connection groove has a connection port that passes through the circumferential side of the drip bucket, and the guide sealing block can be rotated at the port of the sleeve tube section for the dovetail connection block to extend out of the port of the sleeve tube section so as to allow the dovetail connection groove of the drip bucket to be sleeved and detached from the dovetail connection block, and the guide sealing block is located at the port of the sleeve tube section to form a puncture needle tube shielded in the sleeve tube section; An inner extension limit ring is provided at the port of the sleeve tube section, the inner extension limit ring is integrally formed with the sleeve tube section, the inner ring hole of the inner extension limit ring is matched with the guide of the outer tube wall of the drip bucket, and the inner extension limit ring is matched with the axial limit of the guide sealing plug; an anti-puncture baffle ring is provided at the tail end of the drip bucket, the anti-puncture baffle ring includes a baffle ring body with a fracture, the fracture constitutes a guide port for removing the baffle ring body, one end of the fracture of the baffle ring body has a removal and pinching portion, one axial end of the baffle ring body is provided with a plurality of circumferentially distributed connecting protrusions, the connecting protrusions connect the baffle ring body and the drip bucket, the anti-puncture baffle ring of the drip bucket cooperates with the sleeve tube section stopper to form an axial part of the tail end of the drip bucket moving into the inner ring hole of the inner extension limit ring for positioning and the sealing rubber plug is not pierced by the puncture needle tube, the anti-puncture baffle ring is removably arranged at the tail end of the drip bucket, and after the anti-puncture baffle ring is removed, the drip bucket moves axially into the sleeve tube section, thereby forming the sealing rubber plug pierced by the puncture needle tube.
2. The PBS collection liquid injection type feces sampler according to claim 1, characterized in that: The PBS collecting liquid injection joint is located on the circumferential wall of the test tube, and the PBS collecting liquid injection joint corresponds to the spoon mouth position of the collection spoon. The PBS collecting liquid injection joint includes an inner convex portion protruding from the inner side wall of the test tube, and the inner convex portion has a cavity. The rubber sealing plug includes an annular rubber ring, which is sleeved on the outside of the test tube, and a plug is integrally formed on the rubber ring, and the plug is fixedly embedded in the cavity of the inner convex portion.
3. The PBS collection liquid injection type feces sampler according to claim 1, characterized in that: A funnel-shaped needle tube seat for fixing the puncture needle tube is arranged in the bidirectional connection component, the liquid inlet port of the puncture needle tube is located at the bottom of the needle tube seat, and a filter membrane is arranged on the side of the needle tube seat facing the collection rod.
4. The PBS collection liquid injection type feces sampler according to claim 3, characterized in that: The filter membrane is funnel-shaped, and a liquid storage space is provided between the filter membrane and the needle tube seat.
5. The PBS collection liquid injection type feces sampler according to claim 1, characterized in that: The end of the dovetail connecting groove opposite to the connecting port extends beyond the axial center point of the sealing rubber plug, and a positioning pit corresponding to the axial center point of the sealing rubber plug is provided at the bottom of the dovetail connecting groove. A slidable sealing push block is provided in the dovetail connecting groove, and a convex point is provided at the bottom of the sealing push block. The sealing push block can slide until the convex point extends into the positioning pit and presses against the axial center point of the sealing rubber plug.