Magnetic bar assembly

Abstract

The magnetic bar assembly comprises a magnetic bar seat, a magnetic bar connecting piece, a locking screw and a magnetic bar body, a plurality of mounting holes penetrating through the magnetic bar seat are formed in the magnetic bar seat at intervals, each mounting hole comprises a first hole section, a second hole section and a third hole section which are sequentially communicated, and the inner diameter of each second hole section is smaller than that of each first hole section and that of each third hole section; an upper mounting part is arranged at the top end of the magnetic bar connecting piece, a lower mounting part is arranged at the bottom end of the magnetic bar connecting piece, the upper mounting part is embedded into the third hole section, a threaded hole is formed in the top surface of the upper mounting part, the head of the locking screw sinks into the first hole section, and the rod part of the locking screw penetrates through the second hole section to be screwed with the threaded hole; a concave hole coaxial with the magnetic bar connecting piece is formed in the lower mounting part; and the magnetic bar body is inserted into the concave hole and is in interference fit with the magnetic bar connecting piece. After the magnetic bar body is broken and damaged, the whole magnetic bar does not need to be replaced, only the locking screw needs to be unscrewed, a new magnetic bar connecting piece with the magnetic bar body needs to be replaced, and the maintenance cost of the device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nucleic acid extraction, in particular to a magnetic rod assembly. Background Art

[0002] The magnetic bar for nucleic acid extraction is a tool used in the nucleic acid extraction process. It usually works with magnetic beads, using the adsorption characteristics of magnetic beads on nucleic acids to achieve nucleic acid extraction and purification. The magnetic bar adsorbs magnetic beads by generating a magnetic field, thereby helping to separate nucleic acids. In common nucleic acid extraction equipment, the magnetic bar is usually glued to the magnetic bar holder with glue. This installation method is complicated and not firm. When a magnetic bar breaks, it is not easy to disassemble and replace it separately. The entire magnetic bar holder needs to be replaced, which has a high maintenance cost. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the utility model is to provide a magnetic bar assembly, which makes the installation of the magnetic bar more convenient, facilitates the replacement of the magnetic bar after it is damaged, and reduces maintenance costs.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A magnetic bar assembly comprises a magnetic bar seat, a magnetic bar connector, a locking screw and a magnetic bar body, wherein the magnetic bar seat is provided with a plurality of mounting holes which penetrate the magnetic bar seat at intervals, the mounting holes comprising a first hole section, a second hole section and a third hole section which are connected in sequence, the inner diameter of the second hole section being smaller than the inner diameters of the first hole section and the third hole section; an upper mounting portion is provided at the top end of the magnetic bar connector, a lower mounting portion is provided at the bottom end of the magnetic bar connector, the upper mounting portion is embedded in the third hole section, a threaded hole is provided on the top surface of the upper mounting portion, the head of the locking screw is sunk into the first hole section, the rod of the locking screw passes through the second hole section and is screwed into the threaded hole; a concave hole coaxial with the magnetic bar connector is provided on the lower mounting portion, the magnetic bar body is inserted into the concave hole and is interference fit with the magnetic bar connector.

[0006] Preferably, the diameter of the head of the locking screw is adapted to the diameter of the first hole section, and the head of the locking screw is provided with a hexagonal countersunk hole.

[0007] Preferably, the upper mounting portion of the magnetic bar connector is a non-rotating body.

[0008] Preferably, the upper mounting portion of the magnetic bar connector is a cylinder, two sides of the cylinder are formed with opposite planes parallel to the central axis, and the inner shape of the third hole segment corresponds to the outer shape of the upper mounting portion.

[0009] Preferably, the side wall of the third hole segment is perpendicular to the end surface, and the top surface of the upper mounting portion of the magnetic bar connector is in contact with the end surface of the third hole segment.

[0010] Preferably, a boss is formed on a side of the magnetic bar seat away from the first hole segment, and the third hole segment is located on the boss.

[0011] Preferably, the length of the magnetic bar body inserted into the concave hole is 1 / 3-1 / 2 of the length of the magnetic bar body.

[0012] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0013] The utility model magnetic bar assembly comprises a magnetic bar seat, a magnetic bar connector, a locking screw and a magnetic bar body, wherein a plurality of mounting holes penetrating the magnetic bar seat are arranged at intervals on the magnetic bar seat, the mounting holes comprising a first hole section, a second hole section and a third hole section which are connected in sequence, the inner diameter of the second hole section is smaller than the inner diameters of the first hole section and the third hole section; an upper mounting part is arranged at the top end of the magnetic bar connector, a lower mounting part is arranged at the bottom end of the magnetic bar connector, the upper mounting part is embedded in the third hole section, a threaded hole is arranged on the top surface of the upper mounting part, the head of the locking screw is sunk into the first hole section, the rod of the locking screw passes through the second hole section and is screwed into the threaded hole, which is convenient for replacement, and after the magnetic bar body is broken or damaged, there is no need to replace the entire body, and only the locking screw needs to be loosened to replace a new magnetic bar connector with the magnetic bar body, thereby reducing the maintenance cost of the device; a concave hole coaxial with the magnetic bar connector is arranged on the lower mounting part, the magnetic bar body is inserted into the concave hole and is interference-fitted with the magnetic bar connector, thereby increasing the strength of the magnetic bar body to avoid breakage and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0015] Attached Figure 1 It is a three-dimensional diagram of the magnetic rod assembly of the utility model;

[0016] Attached Figure 2 A three-dimensional diagram of the magnetic rod assembly of the utility model from another perspective;

[0017] Attached Figure 3 It is a top view of the magnetic rod assembly of the utility model;

[0018] Attached Figure 4 For attachment Figure 3 AA section view.

[0019] Among them: 1. Magnetic rod seat; 11. Mounting hole; 111. First hole section; 112. Second hole section; 113. Third hole section; 12. Boss; 2. Magnetic rod connector; 21. Upper mounting portion; 22. Lower mounting portion; 23. Plane; 3. Locking screw; 31. Hexagonal countersunk hole; 4. Magnetic rod body. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] As attached Figure 1 , Attachment Figure 2 The utility model is shown as a magnetic bar assembly, including a magnetic bar seat 1, a magnetic bar connector 2, a locking screw 3 and a magnetic bar body 4. The magnetic bar seat 1 is processed with a plurality of mounting holes 11 that penetrate the magnetic bar seat 1 at intervals. The mounting holes 11 include a first hole segment 111, a second hole segment 112 and a third hole segment 113 that are connected in sequence. The opening of the first hole segment 111 is flush with the upper surface of the magnetic bar seat 1, and the opening of the third hole segment 113 is flush with the lower surface of the magnetic bar seat 1. The inner diameter of the second hole segment 112 is smaller than the inner diameters of the first hole segment 111 and the third hole segment 113.

[0023] The top of the magnetic bar connector 2 has an upper mounting portion 21, and the bottom of the magnetic bar connector 2 has a lower mounting portion 22. The upper mounting portion 21 is embedded in the third hole section 113, and a threaded hole is provided on the top surface of the upper mounting portion 21. The head of the locking screw 3 is sunk into the first hole section 111, and the rod of the locking screw 3 passes through the second hole section 112 and is screwed into the threaded hole to fix the magnetic bar connector 2 and the magnetic bar seat 1. The threaded connection is convenient for replacement. After the magnetic bar body 4 is broken or damaged, there is no need to replace the entire body. It is only necessary to loosen the locking screw 3 and replace the new magnetic bar connector 2 with the magnetic bar body 4. The replacement is convenient, which reduces the maintenance cost of the device.

[0024] The lower mounting portion 22 has a concave hole coaxial with the magnetic bar connector 2, and the magnetic bar body 4 is inserted into the concave hole and has an interference fit with the magnetic bar connector 2. Before installation, the magnetic bar body 4 is placed in a low-temperature environment, the magnetic bar connector 2 is placed in a relatively high-temperature environment, and the magnetic bar connector 2 and the magnetic bar body 4 are connected into a whole and then the whole is locked with the magnetic bar seat 1.

[0025] The diameter of the head of the locking screw 3 is adapted to the diameter of the first hole section 111 , and the head of the locking screw 3 has a hexagonal countersunk hole 31 , which is convenient for rotating it with a tool.

[0026] The upper mounting portion 21 of the magnetic bar connector 2 is a non-rotating body. In this embodiment, the upper mounting portion 21 of the magnetic bar connector 2 is a cylinder, and opposite planes 23 parallel to the central axis are formed on both sides of the cylinder. The internal shape of the third hole segment 113 corresponds to the outer shape of the upper mounting portion 21. The magnetic bar connector 2 cannot rotate after being inserted into the third hole segment 113, and is quickly positioned. The side wall of the third hole segment 113 is perpendicular to the end face, and the top surface of the upper mounting portion 21 of the magnetic bar connector 2 fits the end face of the third hole segment 113, thereby improving the matching accuracy and making the verticality between the magnetic bar body 4 and the magnetic bar holder 1 higher. In the process of the magnetic bar holder 1 moving to prepare for nucleic acid extraction, the magnetic bar body 4 can be accurately inserted into the magnetic bar sleeve to avoid the impact of collision caused by skewness on nucleic acid extraction, which is beneficial to the adsorption of magnetic beads, facilitates the transfer of magnetic beads, reduces errors in the extraction process, and improves the efficiency of nucleic acid extraction.

[0027] A boss 12 is formed on one side of the magnetic bar base 1 away from the first hole section 111, and the third hole section 113 is located on the boss 12, so that the magnetic bar connector 2 can be inserted to a sufficient depth, making the connection stable and not easy to shake, while reducing the overall volume of the magnetic bar base 1, reducing weight, and making it easier to move.

[0028] The length of the magnetic bar body 4 inserted into the concave hole is 1 / 3-1 / 2 of the length of the magnetic bar body 4, so that the lower mounting portion 22 covers a large amount of the main magnetic bar body 4, increasing the strength to prevent the magnetic bar body 4 from breaking and extending the service life.

[0029] The magnetic bar assembly of the utility model uses a locking screw to fix the magnetic bar seat and the magnetic bar connecting piece together, which is convenient for replacement. After the magnetic bar body is broken or damaged, there is no need to replace the entirety, and only the locking screw needs to be loosened to replace the new magnetic bar connecting piece with the magnetic bar body, thereby reducing the maintenance cost of the device. A concave hole coaxial with the magnetic bar connecting piece is provided on the lower mounting portion, and the magnetic bar body is inserted into the concave hole and is interference fit with the magnetic bar connecting piece, thereby increasing the strength of the magnetic bar body to avoid breakage, extending the service life, and reducing costs.

[0030] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A magnetic bar assembly, characterized in that: It includes a magnetic rod seat, a magnetic rod connector, a locking screw and a magnetic rod body. The magnetic rod seat is provided with a plurality of mounting holes that penetrate the magnetic rod seat at intervals. The mounting holes include a first hole segment, a second hole segment and a third hole segment that are connected in sequence. The inner diameter of the second hole segment is smaller than the inner diameters of the first hole segment and the third hole segment. The top end of the magnetic rod connector is provided with an upper mounting portion, and the bottom end of the magnetic rod connector is provided with a lower mounting portion. The upper mounting portion is embedded in the third hole segment, and a threaded hole is provided on the top surface of the upper mounting portion. The head of the locking screw is sunk into the first hole segment, and the rod of the locking screw passes through the second hole segment and is screwed into the threaded hole. The lower mounting portion is provided with a concave hole coaxial with the magnetic rod connector, and the magnetic rod body is inserted into the concave hole and is interference fit with the magnetic rod connector.

2. The magnetic bar assembly according to claim 1, characterized in that: The diameter of the head of the locking screw is adapted to the diameter of the first hole section, and the head of the locking screw is provided with a hexagonal countersunk hole.

3. The magnetic bar assembly according to claim 1, characterized in that: The upper mounting portion of the magnetic bar connector is a non-rotating body.

4. The magnetic bar assembly according to claim 1, characterized in that: The upper mounting portion of the magnetic rod connector is a cylinder, two sides of the cylinder are formed with opposite planes parallel to the central axis, and the inner shape of the third hole segment corresponds to the outer shape of the upper mounting portion.

5. The magnetic bar assembly according to claim 1, characterized in that: The side wall of the third hole segment is perpendicular to the end surface, and the top surface of the upper mounting portion of the magnetic bar connector is in contact with the end surface of the third hole segment.

6. The magnetic bar assembly according to claim 1, characterized in that: A boss is formed on one side of the magnetic bar seat away from the first hole section, and the third hole section is located on the boss.

7. The magnetic bar assembly according to claim 1, characterized in that: The length of the magnetic bar body inserted into the concave hole is 1 / 3-1 / 2 of the length of the magnetic bar body.

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