A type of easily detachable PCR tube

Abstract

This utility model relates to a detachable PCR tube assembly, comprising several PCR tubes arranged side-by-side in a horizontal direction. The top of each PCR tube is connected to a top cap via a bent connecting part. Adjacent PCR tubes are detachably connected together by a detachable connector, which includes a first connecting part and a second connecting part. A first locking strip is provided on the inner side of the first connecting part, and a second locking strip is provided on the inner side of the second connecting part. The first locking strip is located above the second locking strip, and the two are locked together. This utility model, through the upper and lower locking structure of the first and second locking strips, combined with the engagement of the insert and the locking head, forms a dual fixing mechanism of "horizontal engagement and vertical locking," achieving a tight connection without external locking components and preventing the tubes from falling off.

Description

Technical Field

[0001] This utility model relates to the technical field of biological experimental consumables, and in particular to a PCR tube that is easy to disassemble. Background Technology

[0002] Polymerase chain reaction (PCR) technology is widely used in the field of biology, and PCR reactions are usually carried out in PCR tubes.

[0003] A search revealed Chinese patent publication number CN221854597U, which discloses a multi-row capped PCR tube, comprising several tubes arranged side by side along a horizontal direction, with one side of the top of the tube connected to the cap via a bent connecting part; adjacent tubes are detachably connected together via a detachable connecting part, which includes a first connecting part and a second connecting part.

[0004] Existing multi-row capped PCR tubes connect adjacent PCR tubes together via a plug-in structure. However, the stability of this plug-in connection is generally poor and it is prone to loosening due to external forces. It also requires external locking devices for tightening, which is quite cumbersome.

[0005] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a detachable PCR tube that would have greater industrial value. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a PCR tube that is easy to disassemble.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A detachable PCR tube assembly includes several PCR tubes arranged side by side in a horizontal direction, with adjacent PCR tubes connected together, and the top side of the PCR tubes connected to the top cover via a bent connection.

[0009] Two adjacent PCR tubes are detachably connected together by a detachable connector, which includes a first connecting part and a second connecting part. The first connecting part is provided on the inner side of one PCR tube, and the second connecting part is provided on the inner side of the other PCR tube. A first locking strip is provided on the inner side of the first connecting part, and a second locking strip is provided on the inner side of the second connecting part. The first locking strip is located above the second locking strip and the two are fastened together.

[0010] Insertion holes are provided on the outer sides of both the first and second card strips in a vertical direction. Insertion blocks are provided on the inner bottom of the first card strip and the inner top of the second card strip in a vertical direction. A locking head is provided on the insertion block. The insertion block can be inserted from one side of the insertion hole and the locking head can be engaged with the other side of the insertion hole.

[0011] As a further improvement of this utility model, flared grooves in the shape of trumpets are provided on both sides of the socket, and the diameter of the flared grooves gradually decreases on the side facing the socket.

[0012] As a further improvement of this utility model, the card head has an elliptical spherical structure.

[0013] As a further improvement of this utility model, the PCR tube body includes an upper tube body and a lower tube body from top to bottom. A tube body claw is installed on the top of the upper tube body, and a chamfered groove and a raised groove are arranged from top to bottom inside the upper tube body. The upper cover includes an upper cover support and a plug located on the upper cover support. A raised ring adapted to the raised groove is provided on the plug. An upper cover hook adapted to the tube body claw is provided on the side of the upper cover support away from the bent connection part. After the upper cover support covers the upper tube body, the upper cover hook hooks onto the tube body claw, and the raised ring on the plug passes through the chamfered groove and then engages in the raised groove.

[0014] As a further improvement of this utility model, a ring-shaped boss is provided on the outer side of the lower tube body.

[0015] As a further improvement of this utility model, a convex ring with an annular structure is provided on the upper tube body below the tube body claw portion.

[0016] As a further improvement of this utility model, several notches are evenly arranged along the circumference on the plug, and retaining ribs that match the notches are evenly arranged along the circumference in the raised groove.

[0017] As a further improvement of this utility model, a number of guide strips are evenly arranged along the circumferential direction inside the lower tube.

[0018] As a further improvement of this utility model, the PCR tube body, the top cap, and the bent connection part are all made of PP material.

[0019] By means of the above solution, this utility model has at least the following advantages:

[0020] This utility model uses the upper and lower snap-fit ​​structure of the first and second clips, combined with the snap-fit ​​of the insert and the clip head, to form a dual fixing mechanism of "horizontal snap-fit ​​and vertical locking". It can achieve a tight connection without external locking parts and prevent the tube from falling off.

[0021] This invention uses flared grooves on both sides of the socket to guide the plug block to quickly align with the socket, reducing operational errors and improving connection efficiency.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the following are the preferred embodiments of this utility model and are described in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a PCR tube that is easy to disassemble according to this utility model;

[0025] Figure 2 yes Figure 1 A schematic diagram of the detachable connector between two adjacent PCR tubes;

[0026] Figure 3 yes Figure 2 A schematic diagram of the structure at the connection between the first connecting part and the second connecting part;

[0027] Figure 4 yes Figure 1 A schematic diagram of the structure of an embodiment of the PCR tube and its cap;

[0028] Figure 5 yes Figure 1 A schematic diagram of another embodiment of the PCR tube and its cap.

[0029] The meanings of the labels in the figures are as follows.

[0030] PCR tube body 1, top cap 2, bent connector 3, detachable connector 4;

[0031] Upper pipe body 11, lower pipe body 12, pipe body claw part 13, chamfered groove 14, raised groove 15, raised ring 16, boss 17, retaining rib 18, guide strip 19;

[0032] 21. Top cover support, 22. Plug, 23. Protruding ring, 24. Top cover hook, 25. Notch;

[0033] First connecting part 41, first locking strip 42, second connecting part 43, second locking strip 44, insertion hole 45, flared groove 46, insertion block 47, locking head 48. Detailed Implementation

[0034] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] The first embodiment of this utility model:

[0037] like Figure 1 As shown, this embodiment of a detachable PCR tube mainly consists of multiple PCR tube bodies 1 arranged side by side, with the multiple PCR tube bodies 1 arranged in parallel along the horizontal direction.

[0038] The top side of the PCR tube 1 is connected to the top cover 2 through the bending connection part 3. Two adjacent PCR tubes 1 are detachably connected together through the detachable connector 4, so that multiple PCR tubes 1 can be combined into a whole or flexibly disassembled.

[0039] like Figure 2 The detachable connector 4 includes a first connecting part 41 and a second connecting part 43.

[0040] The inner side of the PCR tube 1 on the left side is provided with an integrally formed first connecting part 41, and the inner side of the first connecting part 41 is provided with a first retaining strip 42.

[0041] The inner side of the PCR tube 1 on the right side is provided with an integrally formed second connecting part 43, and the inner side of the second connecting part 43 is provided with a second retaining strip 44.

[0042] The first locking strip 42 is located above the second locking strip 44, and the two are connected together by a snap-fit ​​mechanism. The upper and lower snap-fit ​​structure of the first locking strip 42 and the second locking strip 44 forms a dual fixing mechanism of "horizontal snap-fit ​​and vertical locking", which can achieve a tight connection without external locking parts and prevent the tube from falling off.

[0043] like Figure 3 A vertical insertion hole 45 is provided on the outer side of the first locking strip 42, and an insertion block 47 is provided on the bottom inner side of the first locking strip 42. An elliptical spherical locking head 48 is provided at the bottom of the insertion block 47. The surface of the locking head 48 is smooth and the force is evenly distributed. When disassembling, simply push the insertion block 47 lightly, and the elliptical spherical locking head 48 can easily come out of the insertion hole 45 without the need for additional tools, reducing the operation time by more than 50%.

[0044] A vertical insertion hole 45 is provided on the outer side of the second card strip 44, and an insertion block 47 is provided on the top of the inner side of the second card strip 44. An elliptical spherical card head 48 is provided on the top of the insertion block 47.

[0045] When the two are snapped together, the insert 47 at the bottom of the first clip 42 is adapted to the socket 45 on the second clip 44 directly below, and the insert 47 at the top of the second clip 44 is adapted to the socket 45 on the first clip 42 directly above. After the insert 47 is inserted from one side of the socket 45, the clip head 48 is snapped into the other side of the socket 45.

[0046] The socket 45 has flared grooves 46 on both sides, with the diameter of the flared grooves 46 gradually decreasing towards the socket 45. The flared grooves 46 on both sides of the socket (with the diameter gradually decreasing towards the socket) can guide the plug 47 to quickly align with the socket 45, reducing operational errors and improving connection efficiency.

[0047] The following is a brief description of one specific example of the detachable connector 4 mentioned above:

[0048] 1. The first connecting part 41 and the second connecting part 43 can be made of PP material.

[0049] The material is the same as that of the main body of PCR tube 1, using homopolymer PP with a density of 0.90~0.91g / cm³ and a melt flow index (MFI) of 10~20g / 10min. It has good chemical resistance, high temperature resistance and adaptability after molding.

[0050] Made of the same material as PCR tube 1 (can be molded in one piece), ensuring chemical compatibility and mechanical property consistency at the connection point, reducing stress concentration or breakage caused by material differences.

[0051] 2. The first card strip 42 and the second card strip 44 can be made of modified PP material.

[0052] Adding 10% to 15% of thermoplastic elastomer (TPE), such as SEBS (styrene-ethylene-butene-styrene block copolymer), to base PP forms a PP / TPE blend system. This system exhibits good elastic deformation capacity, fatigue resistance, and wear resistance.

[0053] The elastic design of the clip and the insert clip head form a "rigid-flexible" snap-fit ​​structure, which ensures connection strength while reducing disassembly resistance (disassembly force is controlled within the range of 1~2N).

[0054] 3. Insert 47 and clip 48 can be made of glass fiber reinforced PP material.

[0055] It uses 20%~30% chopped glass fiber (GF) to reinforce PP, with a density of approximately 1.1~1.2 g / cm³, a flexural strength ≥80 MPa, and a tensile strength ≥60 MPa. It has good impact resistance and dimensional stability.

[0056] The 48-type connector adopts an elliptical spherical structure (major axis diameter 1.5mm, minor axis diameter 1mm), combined with the rigidity of glass fiber reinforced PP, which can produce slight elastic deformation during snapping, forming an "interference fit" after being inserted into the socket, ensuring connection reliability (pull-out force ≥5N).

[0057] The connecting parts, clips, and clips are all made of PP as the base material. Performance differentiation is achieved through modification (adding TPE and GF), which not only ensures the chemical compatibility of each component with the main body of the tube (avoiding electrochemical corrosion caused by contact between different materials), but also optimizes local functions (such as the elasticity of the clips and the rigidity of the inserts) through blending or enhancement processes.

[0058] All components can be manufactured as a single piece through injection molding, eliminating the need for secondary assembly. For example, the clip and connector utilize a "two-color injection molding" process, with an inner layer of PP / TPE elastomer and an outer layer of base PP, ensuring a balance between the elasticity of the inner side and the rigidity of the outer side of the clip. The insert and clip head, on the other hand, are manufactured using single-component injection molding, leveraging the orientation properties of glass fiber to enhance axial strength.

[0059] All components can withstand 121℃ autoclaving or 75% ethanol wiping disinfection, and the material does not age or release harmful substances. The PP material has strong surface inertness, with an adsorption rate of <0.1% for DNA / RNA samples, avoiding sample loss or contamination during experiments.

[0060] The second embodiment of this utility model:

[0061] like Figure 4 The PCR tube 1 consists of an upper tube 11 and a lower tube 12 from top to bottom. A tube clamp 13 is installed on the top of the upper tube 11, and a chamfered groove 14 and a raised groove 15 are arranged from top to bottom inside the upper tube 11.

[0062] A ring-shaped protrusion 16 is provided on the upper tube body 11 below the tube body claw part 13 to facilitate the limiting of the bottom of the upper cover hook 24.

[0063] A ring-shaped protrusion 17 is provided on the outer side of the lower tube 12 to facilitate the experimenter to hold or fix the tube and prevent it from slipping during operation, which is especially suitable for gloved operation scenarios.

[0064] The upper cover 2 includes an upper cover support portion 21 and a plug 22 located on the upper cover support portion 21. A protruding ring 23 adapted to the protruding groove 15 is provided on the plug 22. An upper cover hook 24 adapted to the tube body claw portion 13 is provided on the side of the upper cover support portion 21 away from the bent connecting portion 3.

[0065] When the top cover 2 is installed on the PCR tube body 1, the top cover hook 24 hooks onto the tube body claw part 13, and the protruding ring 23 on the stopper 22 passes through the chamfered groove 14 and then engages in the protruding groove 15.

[0066] The top cover of the PCR tube 1 is engaged with the raised ring 23 and the raised groove 15, and with the guidance of the chamfered groove 14, a multi-level sealing structure is formed, which improves the airtightness compared with the traditional design and avoids sample contamination or volatilization.

[0067] The third embodiment of this utility model:

[0068] The mounting structure between the PCR tube body and the top cap is based on the second embodiment described above:

[0069] like Figure 5 The plug 22 has several notches 25 evenly arranged along the circumference, and the raised groove 15 has a retaining rib 18 evenly arranged along the circumference to match the notches 25.

[0070] The notches 25 and the retaining ribs 18 are evenly distributed along the circumference (e.g., 8 notches correspond to 8 retaining ribs), forming a "gear meshing" structure. When the plug 22 is inserted into the upper tube, the protruding ring 23 drives the notches 25 to slide down along the chamfered groove 14. The retaining ribs 18 must be aligned with the notches 25 to fully engage, avoiding sealing failure due to misalignment.

[0071] When the retaining rib 18 is inserted into the notch 25, a mechanical locking structure is formed. If the plug needs to be removed, the friction between the retaining rib and the edge of the notch must be overcome.

[0072] Several guide strips 19 are evenly arranged along the circumference inside the lower tube 12 to facilitate the guiding of the liquid inlet.

[0073] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0074] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0075] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detachable PCR tube assembly comprising a plurality of PCR tube bodies (1) arranged side by side along a horizontal direction, wherein two adjacent PCR tube bodies (1) are connected together, and one side of the top of the PCR tube body (1) is connected to the top cover (2) by a bent connecting part (3); Its features are: Two adjacent PCR tubes (1) are detachably connected together by a detachable connector (4). The detachable connector (4) includes a first connecting part (41) and a second connecting part (43). The first connecting part (41) is provided on the inner side of one of the PCR tubes (1), and the second connecting part (43) is provided on the inner side of the other PCR tube (1). A first locking strip (42) is provided on the inner side of the first connecting part (41), and a second locking strip (44) is provided on the inner side of the second connecting part (43). The first locking strip (42) is located above the second locking strip (44), and the two are fastened together. Insertion holes (45) are provided vertically on the outer sides of the first card strip (42) and the second card strip (44). Insert blocks (47) are provided vertically on the inner bottom of the first card strip (42) and the inner top of the second card strip (44). A locking head (48) is provided on the insertion block (47). The insertion block (47) can be inserted from one side of the insertion hole (45) and the locking head (48) can be engaged on the other side of the insertion hole (45).

2. The easily detachable PCR tube as described in claim 1, characterized in that, A flared groove (46) in the shape of a trumpet is provided on both sides of the socket (45), and the diameter of the flared groove (46) gradually decreases on the side facing the socket (45).

3. The easily detachable PCR tube as described in claim 1, characterized in that, The card head (48) has an ellipsoidal structure.

4. The easily detachable PCR tube as described in claim 1, characterized in that, The PCR tube body (1) comprises, from top to bottom, an upper tube body (11) and a lower tube body (12). A tube body clamping part (13) is installed at the top of the upper tube body (11). A chamfered groove (14) and a raised groove (15) are provided in the upper tube body (11) from top to bottom. The upper cover (2) comprises an upper cover support part (21) and a plug (22) located on the upper cover support part (21). The plug (22) is provided with the raised groove (15) mentioned above. 15) A matching protruding ring (23) is provided on the side of the upper cover support (21) away from the bent connection (3) with an upper cover hook (24) that is compatible with the tube body claw (13) mentioned above. After the upper cover support (21) covers the upper tube body (11) and the upper cover hook (24) hooks the tube body claw (13), the protruding ring (23) on the plug (22) passes through the chamfered groove (14) and then is engaged in the protruding groove (15).

5. A detachable PCR tube as described in claim 4, characterized in that, A ring-shaped boss (17) is provided on the outer side of the lower tube (12).

6. The easily detachable PCR tube as described in claim 4, characterized in that, A ring-shaped protrusion (16) is provided on the upper tube (11) below the tube claw portion (13).

7. A detachable PCR tube as described in claim 4, characterized in that, A number of notches (25) are evenly arranged along the circumferential direction on the plug (22), and a retaining rib (18) that matches the notches (25) is evenly arranged along the circumferential direction in the raised groove (15).

8. A detachable PCR tube as described in claim 4, characterized in that, Several guide strips (19) are evenly arranged along the circumferential direction inside the lower tube (12).

9. A detachable PCR tube as described in claim 1, characterized in that, The PCR tube body (1), the top cover (2), and the bending connection part (3) are all made of PP material.

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