CN218345467U

CN218345467U - Cascade magnetic rod sleeve device for nucleic acid extractor

Info

Publication number: CN218345467U
Application number: CN202222498787.1U
Authority: CN
Inventors: 张吉涛; 王显付; 张超铝; 王雄
Original assignee: Shenzhen Huisong Technology Development Co ltd
Current assignee: Shenzhen Huisong Technology Development Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-20
Anticipated expiration: 2032-09-21

Abstract

The utility model provides a cascade bar magnet cover device for among nucleic acid extraction appearance, relates to nucleic acid extraction appearance equipment technical field, and it is unreasonable to solve current bar magnet cover device structural design, bar magnet cover rate of utilization is low, easily buckle, deformation, cracked technical not enough, and the technical scheme of adoption includes: the carrier plate is provided with a plurality of magnetic rod passing openings and a plurality of clamping through grooves corresponding to the magnetic rod passing openings in the same row, the magnetic rod sleeves are 8 rows of magnetic rod sleeves, can be cascaded and spliced end to form a cascade structure, can be detachably inserted into the clamping through grooves and are cascaded, and are aligned with the magnetic rod passing openings of the corresponding row number through a positioning structure. The utility model discloses a bar magnet cover is 8 ally oneself with row structural design, and structural strength is high, resistant buckling, non-deformable, fracture, simple structure, easy dismounting, and it is accurate to counterpoint, and production, packing and convenient to use, and it is low to make and use cost. The magnetic rod sleeve can be spliced and used in a head-to-tail cascading mode, and is simple in structure, convenient to disassemble and assemble, good in adaptability, beneficial to adaptive arrangement and optimization of the deep hole plate, high in utilization rate of the magnetic rod sleeve and low in cost.

Description

Cascade magnetic rod sleeve device for nucleic acid extractor

Technical Field

The utility model relates to a nucleic acid extraction appearance technical field, more specifically relate to a cascade bar magnet cover device for among nucleic acid extraction appearance.

Background

With the development of life sciences, more and more biological experiments require the extraction and detection of nucleic acids (including DNA and RNA) from ex vivo biological samples to aid in the rapid diagnosis of diseases. The magnetic bead method nucleic acid extraction can specifically and reversibly combine and release nucleic acid released in a sample to be extracted, so that nucleic acid separation and purification are performed. At present, the magnetic bead method for extracting nucleic acid generally comprises four main steps of cracking, combining, washing and eluting.

The magnetic bead method nucleic acid extractor is provided with a plurality of magnetic bars matched with the deep hole plate, a plurality of magnetic bar sleeves which are disposable and can protect the magnetic bars from being corroded and damaged due to direct contact with sample liquid, the magnetic bar sleeves are detachably and movably clamped on the support plate so as to be replaced after use, and the magnetic bar sleeves are driven by a driving mechanism to be in linkage operation with the magnetic bars to complete the actions of sleeving the magnetic bars or separating the magnetic bars, so that the magnetic bars are matched with the deep hole plate to realize the collection or release of magnetic beads in the sample liquid.

The nucleic acid extractor is generally divided into two types, namely 32 channels and 96 channels, and is respectively used for extracting a small amount of samples and extracting a large amount of samples. At present, most of the magnetic rod sleeves adapted to the 96-channel nucleic acid extractor are integral plate type 96 Kong Ci rod sleeves, that is, a total of 96 sleeves are arranged on one whole plate magnetic rod sleeve, and the whole plate can correspond to each group of 96-channel magnetic rods. The integral plate type 96 Kong Cibang sleeve can realize quick dismounting and replacement of the whole plate of the magnetic rod sleeve, improves the dismounting and replacement efficiency of the magnetic rod sleeve during extraction of a large amount of sample nucleic acid, and is beneficial to centralized quick treatment of a large amount of samples.

However, the 96-channel nucleic acid extractor is not only used for extracting a large number of samples, but also used for extracting a small number of samples, and if the number of samples in one operation is less than 96, the utilization rate of the magnetic rod sleeve is inevitably low by continuously adopting the 96-hole magnetic rod sleeve replaced by the whole plate, so that the waste of resources is caused by the abandonment after use, and the cost is increased when the extraction operation of a small number of samples is carried out.

Still some 96-channel nucleic acid extractors are provided with multiple magnetic rod sleeves which are arranged in rows, such as 16 rows and 24 rows, and are used in replacement, and each multiple magnetic rod sleeve can be longitudinally used corresponding to each magnetic rod in the rows, so that when the number of sample specimens is less than 96, unnecessary waste of the magnetic rod sleeves is reduced by inserting the corresponding multiple magnetic rod sleeves. However, the overall length of the multiple row bar magnet sleeve is longer than that of the single 8 row bar magnet sleeve, and the longer the bar magnet sleeve is, the more easily the bar magnet sleeve is bent, deformed and broken, which results in difficult assembly and inaccurate alignment during use. Moreover, the production, packaging and use of the overlong multi-row magnetic rod sleeve structure are complicated.

Therefore, there is a need for an improved magnetic rod and sleeve apparatus for use in existing 96-channel acid extractors that overcomes the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

To sum up, the utility model discloses an aim at solves the bar magnet cover device that uses in the current 96 passageway nucleic acid extraction appearance structural design unreasonable, and bar magnet cover rate of utilization is low when a small amount of samples are handled, leads to wasting of resources, with high costs, and the many gang saw structures of overlength lead to its easily buckling, deformation, fracture, cause bar magnet cover dismouting difficulty, alignment inaccurate, and production, packing and use inconvenient, with high costs not enough, and provide a cascade bar magnet cover device for among the nucleic acid extraction appearance.

For solving the utility model provides a technique is not enough, and the technical scheme of adoption does, a cascade bar magnet cover device for among the nucleic acid extraction appearance, a serial communication port, including:

the carrier plate is longitudinally and uniformly distributed with a plurality of magnetic rod through openings penetrating through the carrier plate body in a matrix manner, and the bottom of the carrier plate is longitudinally provided with a plurality of clamping through grooves corresponding to the magnetic rod through openings in the same row respectively;

the magnetic rod sleeves are 8 rows of magnetic rod sleeves, can be spliced into a cascade structure in an end-to-end cascading manner, are detachably inserted into the clamping through grooves and are cascaded, and are aligned with the magnetic rod gaps of corresponding rows through the positioning structures.

Further, the magnetic rod sleeve comprises:

the substrate is of a longitudinally extending plate-shaped structure, and two sides of the substrate are correspondingly provided with sliding clamping tongues which can be inserted into the clamping through grooves in a matched manner;

the 8 sleeves are vertically and downwards fixedly connected to the base plate at equal intervals, and the upper end openings of the sleeves corresponding to the magnetic rod through openings are arranged on the long axis of the base plate in a penetrating manner;

the cascade clamping groove is of a clamping groove structure with an opening at the rear end and is fixedly arranged at the rear end of the substrate;

and the cascade ring is fixedly arranged at the front end of the substrate and can be longitudinally and correspondingly clamped into the cascade clamping grooves to realize cascade splicing of the two magnetic rod sleeves.

Further, the cascade card slot comprises:

the bearing groove is longitudinally and fixedly arranged at the rear end of the substrate and is used for longitudinally limiting and bearing the cascade ring;

the tongue-shaped elastic buckle is longitudinally and fixedly arranged on the bearing groove and used for elastically clamping the cascade ring to lock the cascade ring on the bearing groove.

Further, the positioning structure comprises:

the positioning grooves are correspondingly arranged on two sides of the sliding clamping tongue;

the positioning top bead assembly is correspondingly arranged on two sides of the clamping through groove and is respectively positioned in the same column at equal intervals in the interval range of the magnetic rod passing through the opening, and the positioning groove is elastically abutted with the magnetic rod sleeve to be positioned at the corresponding magnetic rod passing through the opening.

Further, the magnetic rod sleeve further comprises:

the reinforcing rib enclosing walls are correspondingly and longitudinally fixedly arranged on two sides of the bottom of the substrate;

the eight-claw reinforcing rib is connected between the outer wall of the top of the sleeve and the bottom surface of the substrate and the reinforcing rib enclosure;

and the anti-skidding reinforcing ribs are arranged at the bottom of the rear end of the substrate and are positioned between the cascade clamping grooves and the sleeve.

Furthermore, the eight-claw reinforcing ribs are connected in series on the axis of the base plate to form a reinforcing star chain with 8 star-connected beads and two sides respectively connected with the corresponding reinforcing rib enclosing walls.

Further, the magnetic rod sleeve further comprises:

the handheld part is positioned at the rear part of the base plate and positioned between the cascade clamping groove and the sleeve, and the anti-skidding reinforcing ribs are positioned on the handheld part.

Furthermore, each clamping through groove front end all be equipped with be located the anterior socket of taking out of support plate, the bar magnet cover pass through take out the socket location peg graft in the through groove of clamping.

Furthermore, the magnetic rod through openings comprise 6 groups of magnetic rod through opening groups in 3 rows and 2 rows, and each group of magnetic rod through opening groups comprises 2 parallel magnetic rod through openings.

Furthermore, each of the bar magnet through holes comprises 8 bar magnet through holes arranged at equal intervals.

The utility model has the advantages that:

1. the utility model discloses a bar magnet cover is 8 antithetical couplet row structural design, and whole length is shorter, and structural strength is high, resistant buckling, non-deformable, fracture, can take out and insert the dismouting ground and assemble on the logical groove of joint of support plate, cross the mouth through location structure and corresponding bar magnet and adjust well, simple structure, easy dismounting, it is accurate to cross the mouth with the bar magnet and counterpoint, and production, packing and use are all more convenient, and it is lower to make and use cost compare in the 96 holes bar magnet cover of integrative board-like and ally oneself with row bar magnet cover more.

2. The utility model discloses a bar magnet cover can cascade the concatenation use from beginning to end, when carrying out a small amount of sample detection (8 or following), can directly counterpoint single bar magnet cover and peg graft corresponding bar magnet crossing department that the joint led to the groove and use, and the dismouting is swift, counterpoint accurate, convenient to use. When the sample amount is more than 8 and less than 96, two or three magnetic rod sleeves can be cascaded and spliced into a cascade structure from head to tail, so that the cascade structure is converted into a multiple-row magnetic rod sleeve with 16 or 24 rows, the multiple-row magnetic rod sleeve after cascading is correspondingly inserted into a clamping through groove, the multiple-row magnetic rod sleeve is aligned with the magnetic rods with corresponding rows through a positioning structure, and the multiple-row magnetic rod sleeve after cascading can be integrally drawn out once after use.

Drawings

Fig. 1 is a schematic view of a connection structure of the magnet sleeve and the carrier plate of the present invention;

FIG. 2 is a schematic view of the bottom structure of the carrier plate of the present invention;

FIG. 3 is a schematic view of the connection structure of the magnetic rod sleeve and the clamping through groove of the present invention;

FIG. 4 is a schematic view of the magnetic rod sleeve structure of the present invention;

FIG. 5 is an enlarged schematic view of the structure of the cascade slot of the present invention;

fig. 6 is a schematic view of the bottom structure of the magnetic rod sleeve of the present invention.

In the figure: 1. the magnetic bar clamping device comprises a carrier plate, 11 magnetic bar passing openings, 12 clamping through grooves, 122 drawing and inserting openings, 13 positioning top bead assemblies, 2 magnetic bar sleeves, 21 base plates, 22 sleeves, 23 cascading clamping grooves, 231 bearing grooves, 232 tongue-shaped elastic buckles, 233 clamping protrusions, 234 guiding inclined planes, 24 cascading rings, 25 sliding clamping tongues, 26 positioning grooves, 27 reinforcing rib enclosing walls, 28 eight-claw reinforcing ribs, 29 anti-skidding reinforcing ribs and 30 handheld portions.

Detailed Description

The structure of the present invention will be further described with reference to the accompanying drawings and preferred embodiments of the present invention.

Referring to fig. 1 to 3, the present invention relates to a cascade magnetic rod sleeve device used in a nucleic acid extraction instrument, which comprises a support plate 1 movably arranged in the extraction instrument and a magnetic rod sleeve 2 detachably connected on the support plate 1.

Specifically, the carrier plate 1 is a horizontal plate-shaped structure, a plurality of magnetic rod through openings 11 penetrating through the carrier plate body are longitudinally and uniformly distributed in a matrix manner on the carrier plate, and a plurality of clamping through grooves 12 corresponding to the magnetic rod through openings 11 in the same row are longitudinally arranged at the bottom of the carrier plate.

Specifically, the magnetic rod sleeves 2 are 8 rows of magnetic rod sleeves, can be spliced into a cascade structure in an end-to-end cascading manner, are detachably inserted into the clamping through grooves 12 and are cascaded, and are aligned with the magnetic rod through holes 11 of corresponding rows through the positioning structures.

After the technical scheme is adopted, the utility model discloses following beneficial effect has.

The utility model discloses a bar magnet cover 2 is 8 antithetical couplet row structural design, whole length is shorter, structural strength is high, resistant buckling, non-deformable, the fracture, can take out and insert the dismouting ground and assemble on the logical groove 12 of joint of support plate 1, cross a mouthful 11 through location structure and corresponding bar magnet and adjust well, simple structure, easy dismounting, it is accurate to cross a mouthful 11 counterpoint with the bar magnet, and production, packing and use all compare conveniently, it is lower to make and use cost compare in the bar magnet cover 2 and ally oneself with row of bar magnet cover 2 more in 96 Kong Ci of an organic whole board-type.

Additionally, the utility model discloses a bar magnet cover 2 can cascade the concatenation use from beginning to end, when carrying out a small amount of sample detection (8 or following), can directly be counterpointed single bar magnet cover 2 and peg graft the first row bar magnet that the groove 12 was led to the joint and cross 11 uses, and the dismouting is swift, counterpoint accurate, convenient to use. When the sample amount is more than 8 and less than 96, two or three magnetic rod sleeves 2 can be cascaded and spliced end to form a cascade structure, so that the cascade structure is converted into a multiple magnetic rod sleeve 2 with 16 or 24 rows, the cascaded multiple magnetic rod sleeve 2 is correspondingly inserted into a clamping through groove 12, the cascade structure is aligned with a magnetic rod gap 11 with corresponding row number through a positioning structure, and the cascaded multiple magnetic rod sleeve 2 can be integrally drawn out after being used.

The further improved technical solution adopted to solve the technical problems of the present invention also includes the following technical features.

Further, referring to fig. 4 to 6, the magnetic rod sleeve 2 of the present invention includes a base plate 21, a sleeve 22, a cascade slot 23 and a cascade ring 24.

Specifically, the substrate 21 is a longitudinally extending plate-shaped structure, and two sides of the substrate are correspondingly provided with sliding locking tongues 25 which can be inserted into the locking through grooves 12 in a matching manner.

Specifically, the number of the sleeves 22 is 8, the sleeves are vertically and vertically fixedly connected to the substrate 21 at equal intervals, and the sleeves 22 are arranged on the long axis of the substrate 21 in a penetrating manner corresponding to the upper end openings of the bar magnet through holes 11.

Specifically, the cascade slot 23 is a slot structure with an opening at the rear end, and is longitudinally and fixedly disposed at the rear end of the substrate 21.

Specifically, the cascade ring 24 is a rectangular closed ring structure, is longitudinally and fixedly arranged at the front end of the substrate 21, and can be longitudinally and correspondingly clamped into the cascade clamping groove 23 to realize the cascade splicing of the two magnetic rod sleeves 2.

The magnetic rod sleeve 2 of the utility model realizes cascade splicing through the cascade ring 24 and the cascade clamping groove 23 at the front end and the rear end of the base plate 21, and has simple structure and convenient cascade operation; through the sliding connection of the sliding clamping tongues 25 on the two sides of the base plate 21 and the clamping through groove 12, the magnetic rod sleeve 2 can slide more stably and smoothly in the clamping through groove 12, and the magnetic rod sleeve 2 after cascading is convenient to align with the corresponding magnetic rod through opening 11.

Further, referring to fig. 5, the cascade slot 23 of the magnetic rod sleeve 2 of the present invention includes a receiving slot 231 and a tongue-shaped elastic buckle 232.

Specifically, the receiving groove 231 is longitudinally and fixedly disposed at the rear end of the base plate 21, and is used for longitudinally limiting and receiving the cascade ring 24.

Specifically, the tongue-shaped elastic buckle 232 is longitudinally and fixedly arranged on the receiving groove 231, and one end of the tongue-shaped elastic buckle having the clamping protrusion 233 is located at the rear part of the receiving groove 231 and is clamped into the middle cavity of the cascade ring 24 correspondingly and elastically.

Specifically, the rear end of the locking protrusion 233 of the tongue-shaped elastic latch 232 is provided with a guiding inclined plane 234 extending obliquely from top to bottom, and the guiding inclined plane 234 can be beneficial to pushing the tongue-shaped elastic latch 232 against the front end of the cascade ring 24 to deform the same, so that the cascade ring 24 can be conveniently locked into the receiving groove 231 from back to front.

When the cascade splicing is carried out, the cascade ring 24 at the front end of the next magnet rod sleeve 2 is correspondingly and longitudinally inserted into the cascade clamping groove 23 at the rear end of the previous magnet rod sleeve 2, the clamping protrusion 233 and the bearing groove 231 of the tongue-shaped elastic buckle 232 are used for limiting together, the cascade ring 24 is clamped, and the cascade ring 24 is locked on the bearing groove 231, so that the cascade splicing of the two magnet rod sleeves 2 is realized.

Further, referring to fig. 3 and 4, the positioning structure of the present invention includes a positioning groove 26 and a positioning top bead assembly 13.

Specifically, at least one set of positioning grooves 26 is correspondingly arranged at the front part of the sliding latch 25 at both sides of the base plate 21 of the magnetic rod sleeve 2. Matched with, the location top pearl subassembly 13 correspond the both sides of locating the logical groove 12 of joint of support plate 1, the location top pearl subassembly 13 quantity that sets up on every joint logical groove 12 need with the logical groove 12 of joint with the magnetic rod of the same row of logical quantity phase-match of mouth 11, each group location top pearl subassembly 13 is located the interval within range of the every magnetic rod of the same row of mouth 11 respectively at the equidistance.

During actual disassembly and assembly, the magnetic rod sleeve 2 enters from the front end of the clamping through groove 12 under the limiting and guiding of the sliding clamping tongues 25 on the two sides of the base plate 21, the positioning ejection ball assembly 13 is pushed and retracted by the sliding clamping tongues 25 in the entering process, the positioning groove 26 and the positioning ejection ball assembly 13 are clamped in an elastic corresponding mode when moving to the positioning ejection ball assembly 13, at the moment, each sleeve 22 on the magnetic rod sleeve 2 is aligned with the magnetic rod through opening 11 in the corresponding position, and positioning assembly of the magnetic rod sleeve 2 is achieved. If the magnetic rod sleeves 2 are assembled in a cascading mode, the thrust on the magnetic rod sleeves 2 can be increased, the positioning ejection ball assembly 13 is elastically ejected back through the sliding clamping tongue 25, and therefore the previous magnetic rod sleeve 2 is pushed to move forwards continuously along the clamping through groove 12 until the next magnetic rod sleeve 2 is positioned and clamped at the magnetic rod through opening 11 in the first row.

The utility model discloses a location simple structure, location convenient operation just does not influence the concatenation of cascading of bar magnet cover 2, can realize the accurate counterpoint of each bar magnet cover 2 and each bar magnet mouth of crossing 11.

Preferably, the positioning ball-ejecting component 13 is a ball plunger, and is correspondingly connected to the clamping through groove 12 in a threaded manner, and a screw hole (not shown in the figure) matched with the clamping through groove is transversely formed in a corresponding position of the clamping through groove.

Further, referring to fig. 6, the magnetic rod sleeve 2 of the present invention further includes a rib enclosure 27, eight-claw ribs 28, and an anti-slip rib 29.

Specifically, the reinforcing rib enclosing wall 27 is a vertical and longitudinally extending strip-shaped structure and is correspondingly and longitudinally fixedly arranged on two sides of the bottom of the base plate 21, the eight-claw reinforcing ribs 28 are connected between the outer wall of the top of the sleeve 22 and the bottom surface of the base plate 21 and the reinforcing rib enclosing wall 27, and the anti-skid reinforcing ribs 29 are arranged at the bottom of the rear end of the base plate 21 and are positioned between the cascade clamping grooves 23 and the sleeve 22.

Further, referring to fig. 6, the eight-claw reinforcing rib 28 of the magnetic rod sleeve 2 of the present invention is connected in series on the axis of the base plate 21 to form a reinforcing star chain with 8 star beads and two sides connected to the corresponding reinforcing rib enclosure 27.

The utility model discloses each sleeve 22 on the bar cover 2 is fixed as an organic whole through eight claw strengthening rib 28 on its upper portion outer wall and the strengthening rib enclosure 27 of base plate 21 bottom surface and both sides, has guaranteed sleeve 22 and base plate 21's structural strength and connection reliability. And simultaneously, the utility model discloses an antiskid strengthening rib 29, strengthening rib enclosure 27 that set up and the enhancement star chain of establishing ties together have further improved 2 holistic anti buckling of bar magnet cover and anti deformability, make the utility model discloses an 8 ally oneself with arrange bar magnet cover 2 structural strength is higher, can not appear buckling, warp and fracture etc. anomaly under the normal condition, have guaranteed accuracy, reliability and the convenient degree of 2 dismouting of bar magnet cover and counterpoint.

Further, referring to fig. 4 and 6, the magnetic rod cover 2 of the present invention further includes a hand-held portion 30.

Specifically, the handheld portion 30 is located at the rear portion of the base plate 21 and located between the cascade clamping groove 23 and the sleeve 22, and the anti-slip reinforcing rib 29 is located on the handheld portion 30.

The utility model discloses handheld portion 30 on bar magnet cover 2 can be used to the user to hand and takes to make things convenient for taking out of bar magnet cover 2 to insert the dismouting or cascade the concatenation, and handheld portion 30 carries out the structure through anti-skidding strengthening rib 29 and strengthens, and structural strength is higher, can bear bigger holding power of taking and indeformable, and still has anti-skidding effect simultaneously, has guaranteed handheld reliability and the stability of taking.

Further, as shown in fig. 1 to 3, the front end of each through groove 12 for the joint of the present invention is provided with a drawing socket 122 located at the front of the carrier plate 1, and during actual use, the magnetic rod sleeve 2 passes through the drawing socket 122 located and inserted in the through groove 12 for the joint.

The utility model discloses to take out socket 122 setting at the front portion of support plate 1, can make things convenient for taking out of bar cover 2 to insert. After the magnetic rod sleeve 2 is positioned and clamped at the first row of magnetic rod passing openings 11 of the clamping through groove 12, the cascading clamping groove 23 at the tail end of the magnetic rod sleeve is positioned at the withdrawing opening 122, so that the cascading ring 24 at the head end of the next magnetic rod sleeve 2 is conveniently matched and clamped with the magnetic rod sleeve.

Further, referring to fig. 1 to 2, the magnetic rod through holes 11 on the carrier plate 1 of the present invention include 6 magnetic rod through hole groups in total, which are 3 rows and 2 columns, and each magnetic rod through hole group includes 2 parallel magnetic rod through holes 11.

Furthermore, each of the bar magnet through holes 11 includes 8 bar magnet through holes arranged at equal intervals.

The utility model discloses bar magnet on support plate 1 is crossed mouthful 11 and is divided into the bar magnet of 6 groups in total of 3 rows of 2 row overall arrangements and crosses mouthful 11 groups, and every bar magnet crosses mouthful 11 and all includes 8 bar magnet via holes to form the bar magnet that matches 96 passageway bar magnets on support plate 1 and cross mouthful 11 group's structures. And in match, the clamping through grooves 12 are provided with 4 rows which are respectively in up-and-down butt joint communication with the 3 rows of magnetic rod through holes in the same row, and the magnetic rod sleeves 2 can be cascaded and spliced into a 24-row structure to be matched and clamped with each clamping through groove 12.

After the technical scheme is adopted, the clamping position of the deep hole plate can be adaptively determined according to the number of samples actually extracted, so that the magnetic rod sleeves 2 or the cascade magnetic rod sleeves 2 with proper number are assembled to be matched with the magnetic rod sleeves to complete nucleic acid extraction, the utilization rate of the magnetic rod sleeves 2 is further improved to the maximum extent, the waste of the magnetic rod sleeves 2 is avoided, and the extraction cost is reduced.

The above embodiments are merely for clarity of the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Various corresponding changes and modifications can be made by those skilled in the art without departing from the spirit and essence of the invention, and these corresponding changes and modifications are intended to be included within the scope of the invention.

Claims

1. A cascade magnetic rod sleeve device used in a nucleic acid extractor is characterized by comprising:

the carrier plate is longitudinally and uniformly distributed with a plurality of magnetic bar passing openings penetrating through the carrier plate body in a matrix manner, and the bottom of the carrier plate is longitudinally provided with a plurality of clamping through grooves corresponding to the magnetic bar passing openings in the same row;

2. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 1, wherein the magnetic rod sleeve comprises:

and the cascade ring is fixedly arranged at the front end of the substrate and can be longitudinally and correspondingly clamped into the cascade clamping grooves to realize the cascade splicing of the two magnetic rod sleeves.

3. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 2, wherein the cascade card slot comprises:

4. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 2, wherein the positioning structure comprises:

the positioning top bead assembly is correspondingly arranged on two sides of the clamping through groove and is respectively positioned in the same row at equal intervals in the interval range of the magnetic rod passing opening, and the positioning groove can be elastically abutted and connected with the magnetic rod sleeve to be positioned at the corresponding magnetic rod passing opening.

5. The cascade magnetic rod sleeve device used in a nucleic acid extractor according to claim 2, wherein the magnetic rod sleeve further comprises:

and the anti-skid reinforcing ribs are arranged at the bottom of the rear end of the substrate and are positioned between the cascade clamping grooves and the sleeve.

6. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 5, wherein the eight-claw reinforcing ribs are connected in series on the axis of the substrate to form a reinforcing star chain of 8 star-connected beads, and the two sides of the reinforcing star chain are respectively connected with the corresponding reinforcing rib enclosing walls.

7. The cascade magnetic rod sleeve device used in the nucleic acid extractor according to claim 5, wherein the magnetic rod sleeve further comprises:

8. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 1, wherein the front end of each of the clamping through slots is provided with a drawing and inserting opening at the front of the carrier plate, and the magnetic rod sleeve is positioned and inserted in the clamping through slot through the drawing and inserting opening.

9. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 1, wherein the magnetic rod through holes comprise 6 sets of magnetic rod through holes in 3 rows and 2 columns, each set of magnetic rod through holes comprises 2 parallel magnetic rod through holes.

10. The cascade magnetic rod sleeve device for the nucleic acid extractor as claimed in claim 9, wherein each of the magnetic rod through holes comprises 8 magnetic rod through holes arranged at equal intervals.