Nanoliter sample application needle

Abstract

The utility model relates to a nanoliter sample application needle which comprises a suction head, the suction head comprises a liquid dropping end, a connecting ring is coaxially arranged on the inner wall of one end, far away from the liquid dropping end, of the suction head, and a plurality of filter element mounting grooves are formed in the connecting ring; the filtering mechanism comprises a filter element base body and a filter element mounting ring provided with the filter element base body, the filter element mounting ring is made of an elastic material, a plurality of filter element mounting parts corresponding to the filter element mounting grooves are arranged on the outer side wall of the filter element mounting ring, and the filter element mounting parts can be clamped to the bottoms of the filter element mounting grooves; the side wall of the filter element mounting ring is in interference fit with the side wall of the connecting ring; the filter element mounting part is in interference fit with the filter element mounting groove; the outer side wall of the end is provided with a plurality of clamping parts corresponding to the filter element mounting grooves, the connecting ring is provided with a plurality of clamping grooves corresponding to the clamping parts, and the clamping grooves are communicated with the filter element mounting grooves. Through the arrangement of the connecting ring, the filter element mounting ring and the clamping part, the mounting difficulty of the sample application needle head filter element is reduced, and the mounting efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sample spotting instruments, in particular to a nanoliter sample spotting needle. Background Art

[0002] The spotting needle is an important component used for sample spotting in the spotting instrument. In order to avoid cross contamination, a filter element is often set in the spotting needle. If the filter element can be easily installed in the needle, it will greatly reduce the difficulty of installing the spotting needle filter element and improve the installation efficiency. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a nanoliter spotting needle.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A nanoliter spotting needle, comprising:

[0006] A suction head, the suction head comprising a dripping end, a connecting ring is coaxially arranged on the inner wall of an end of the suction head away from the dripping end, and the connecting ring is provided with a plurality of filter element mounting grooves;

[0007] A filter mechanism, the filter mechanism comprising a filter element base and a filter element mounting ring on which the filter element base is disposed, the filter element mounting ring being made of an elastic material, the outer side wall of the filter element mounting ring being provided with a plurality of filter element mounting portions corresponding to the plurality of filter element mounting grooves, the filter element mounting portions being snap-fitted to the groove bottoms of the filter element mounting grooves, the side walls of the filter element mounting ring being interference-fitted to the side walls of the connecting ring, and the filter element mounting portions being interference-fitted to the filter element mounting grooves;

[0008] The end head has a plurality of clamping parts on its outer side wall corresponding to the plurality of filter element mounting grooves, the connecting ring has a plurality of clamping grooves corresponding to the plurality of clamping parts, the clamping grooves are connected to the filter element mounting grooves, when the clamping parts are clamped in the clamping grooves, the clamping parts partially abut against the filter element mounting parts and the end face of the end head close to the suction head abuts against the end face of the filter element mounting ring close to the end head.

[0009] As a further improvement: there are three filter element installation grooves, and the three filter element installation grooves are evenly arranged on the connecting ring.

[0010] As a further improvement: the end surface of the filter element mounting ring close to the suction head is provided with a first chamfer, and the connecting ring is provided with a second chamfer adapted to the first chamfer.

[0011] As a further improvement: an expanded diameter portion is provided at one end of the end head away from the filtering mechanism.

[0012] The utility model has the following beneficial effects:

[0013] 1. By providing a connecting ring and a filter element installation ring, the filter element installation part on the filter element installation ring is clamped into the filter element installation groove on the connecting ring, thereby realizing the installation of the filter mechanism on the suction head.

[0014] 2. By setting a clamping part on the end head, clamping the clamping part into the filter element installation groove and screwing it into the clamping groove, the assembly between the end head and the suction head is realized, and at the same time, the end face of the end head close to the suction head abuts against the end face of the filter element installation ring close to the end head to realize the abutment and fixation of the filter mechanism.

[0015] 3. By setting the filter element installation ring to an elastic material and interferingly fitting the side wall of the filter element installation ring with the side wall of the connecting ring and the filter element installation part with the filter element installation groove, the air tightness between the connecting ring and the filter element installation ring and between the filter element installation ring and the end head is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the suction head of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the filter mechanism of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the terminal of the utility model.

[0021] Reference numerals:

[0022] 1-pipette tip; 2-filter mechanism; 3-end;

[0023] 11-drip end; 12-connection ring;

[0024] 121-filter element installation slot; 122-clip slot;

[0025] 21-filter element base; 22-filter element mounting ring;

[0026] 221-filter element installation part;

[0027] 31-clamping portion; 32-diameter expansion portion. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0029] In the description of the present invention, the terms "upper", "lower", "above", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0031] The following combination Figure 1-4 The utility model is described in further detail.

[0032] Reference Figure 1-4 As shown, this embodiment provides a nanoliter spotting needle, comprising:

[0033] The suction head 1 comprises a dripping end 11, and a connecting ring 12 is coaxially arranged on the inner wall of one end of the suction head 1 away from the dripping end 11, and the connecting ring 12 is provided with a plurality of filter element installation grooves 121;

[0034] The filter mechanism 2 includes a filter element base 21 and a filter element mounting ring 22 on which the filter element base 21 is disposed. The filter element mounting ring 22 is made of an elastic material. The outer side wall of the filter element mounting ring 22 is provided with a plurality of filter element mounting portions 221 corresponding to the plurality of filter element mounting grooves 121. The filter element mounting portions 221 can be snap-fitted to the bottom of the filter element mounting groove 121. The side wall of the filter element mounting ring 22 is interference-fitted with the side wall of the connecting ring 12. The filter element mounting portions 221 are interference-fitted with the filter element mounting groove 121.

[0035] The end head 3, the outer side wall of the end head 3 is provided with a plurality of clamping parts 31 corresponding to the plurality of filter element installation grooves 121, the connecting ring 12 is provided with a plurality of clamping grooves 122 corresponding to the plurality of clamping parts 31, the clamping grooves 122 are connected to the filter element installation grooves 121, when the clamping parts 31 are clamped in the clamping grooves 122, the clamping parts 31 partially abut against the filter element installation part 221 and the end face of the end head 3 close to the suction head 1 abuts against the end face of the filter element installation ring 22 close to the end head 3.

[0036] Specifically, there are three filter element installation grooves 121 , and the three filter element installation grooves 121 are evenly arranged on the connecting ring 12 .

[0037] By setting the side wall of the filter element mounting ring 22 to be an interference fit with the side wall of the connecting ring 12, when the side wall of the filter element mounting ring 22 abuts against the side wall of the connecting ring 12, the filter element mounting ring 22 can be pressed against the connecting ring 12, thereby ensuring the air tightness between the filter element mounting ring 22 and the connecting ring 12; by setting the filter element mounting portion 221 to be an interference fit with the filter element mounting groove 121, when the filter element mounting portion 221 is snapped onto the bottom of the filter element mounting groove 121, the filter element mounting portion 221 can be pressed against the filter element mounting groove 121, thereby ensuring the air tightness between the filter element mounting portion 221 and the filter element mounting groove 121; the above method improves the accuracy of pipetting using a needle.

[0038] The terminal 3 includes a connection end for connecting to other structures.

[0039] The working principle of the utility model is as follows: first align each filter element mounting portion 221 with a filter element mounting groove 121, then clamp the filter element mounting portion 221 to the bottom of the filter element mounting groove 121 along the axial direction of the connecting ring 12 to complete the installation of the filter mechanism 2 on the suction head 1, then align each clamping portion 31 with a filter element mounting groove 121, then abut the clamping portion 31 against the end surface of the filter element mounting portion 221 along the axial direction of the connecting ring 12, and finally rotate the end head 3 along the axial direction of the mounting ring to drive the clamping portion 31 to screw into the clamping groove 122 to complete the assembly between the end head 3 and the suction head 1 and the abutment and fixation of the end head 3 and the suction head 1 to the filter mechanism 2.

[0040] In one embodiment, the filter element mounting ring 22 can be made of rubber.

[0041] In order to provide a guide for the installation of the filter element mounting ring 22 on the connecting ring 12 to improve the convenience of installing the filter element mounting ring 22, as a further improvement, the end surface of the filter element mounting ring 22 close to the suction head 1 is provided with a first chamfer, and the connecting ring 12 is provided with a second chamfer adapted to the first chamfer.

[0042] In order to facilitate the connection between the end head 3 and other structures, as a further improvement, an expanded diameter portion 32 is provided at one end of the end head 3 away from the filtering mechanism 2 .

[0043] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A nanoliter spotting needle, characterized in that: include: A suction head, the suction head comprising a dripping end, a connecting ring is coaxially arranged on the inner wall of an end of the suction head away from the dripping end, and the connecting ring is provided with a plurality of filter element mounting grooves; A filter mechanism, the filter mechanism comprising a filter element base and a filter element mounting ring on which the filter element base is disposed, the filter element mounting ring being made of an elastic material, the outer side wall of the filter element mounting ring being provided with a plurality of filter element mounting portions corresponding to the plurality of filter element mounting grooves, the filter element mounting portions being snap-fitted to the groove bottoms of the filter element mounting grooves, the side walls of the filter element mounting ring being interference-fitted to the side walls of the connecting ring, and the filter element mounting portions being interference-fitted to the filter element mounting grooves; The end head has a plurality of clamping parts on its outer side wall corresponding to the plurality of filter element mounting grooves, the connecting ring has a plurality of clamping grooves corresponding to the plurality of clamping parts, the clamping grooves are connected to the filter element mounting grooves, when the clamping parts are clamped in the clamping grooves, the clamping parts partially abut against the filter element mounting parts and the end face of the end head close to the suction head abuts against the end face of the filter element mounting ring close to the end head.

2. The nanoliter spotting needle according to claim 1, characterized in that: There are three filter element installation grooves, and the three filter element installation grooves are evenly arranged on the connecting ring.

3. The nanoliter spotting needle according to claim 1, characterized in that: The end surface of the filter element mounting ring close to the suction head is provided with a first chamfer, and the connecting ring is provided with a second chamfer adapted to the first chamfer.

4. The nanoliter spotting needle according to claim 1, characterized in that: An expanded diameter portion is provided at one end of the end head away from the filtering mechanism.

Images