Detachable adapter of pipette

Abstract

The utility model discloses a detachable adapter for a pipette, which comprises connectors and a mounting seat, each connector comprises a sleeve and an insertion tube which are in axial butt joint, the sleeves and the insertion tubes are integrally formed by injection molding, the number of the connectors is one or more, the mounting seat is a rectangular strip-shaped shell, the connectors are arranged at equal intervals along the length direction of the mounting seat and vertically penetrate through the mounting seat, and the connectors are connected with the insertion tubes. The lower end of the cannula extends out of the mounting seat, the cannula is sleeved with a balloon, an annular joint between the balloon and the cannula is adhered and sealed through a glue solution, a plurality of uniformly distributed bumps are arranged on the inner wall of the balloon along the circumference, the bumps correspondingly and radially penetrate through through holes in the side wall of the cannula, an inner cavity of the mounting seat is filled with liquid, and the balloon is compressed by squeezing the liquid. After the adapter is inserted and mounted, the knob is rotated to push the piston to move inwards, the pressure of liquid in the mounting seat is increased to extrude the balloon, and the convex block is used for centering and clamping an insertion nozzle of the pipette, so that the insertion nozzle is effectively prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of test equipment, in particular to a detachable adapter for a liquid transfer gun. Background Art

[0002] Experiments in the biological field often involve transferring liquid drugs for experiments. In the process of transferring the drug solution, some relatively simple pipetting devices such as rubber-tipped droppers are often used. In more rigorous scientific experiments, some special liquid quantitative pipettes are also used. In the process of absorbing the drug solution, the principle of air pressure difference is used to press the drug into the pipette tip. Multi-channel pipettes (i.e. row guns) generally have 8 channels or 12 channels, which can absorb multiple samples at the same time to improve the test efficiency. There are many brands and specifications of pipette tips on the market. During use, there is a problem that the caliber of the gun tip does not match the pipette, and an adapter is needed. However, the conventional large and small head, straight-plug adapter is not firm after insertion, and it is easy to fall off due to pulling when replacing the gun tip. After falling and being contaminated, it cannot be used again. Utility Model Content

[0003] The purpose of the utility model is to provide a detachable adapter for a pipette gun to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a detachable adapter for a pipette, comprising a connector and a mounting seat, the connector comprising an axially connected sleeve and a cannula, the sleeve and the cannula are integrally injection-molded, the connector is or pieces, the mounting seat is a rectangular long strip shell, the connectors are arranged at equal intervals along the length direction of the mounting seat and vertically penetrate, the lower end of the cannula extends from the mounting seat, a balloon is sleeved on the sleeve, the annular joint between the balloon and the sleeve is sealed by adhesive bonding, the inner wall of the balloon is provided with a plurality of evenly distributed protrusions along the circumference, the protrusions radially penetrate from the through holes on the side wall of the sleeve, the inner cavity of the mounting seat is filled with liquid, and the balloon is compressed by squeezing the liquid.

[0005] Preferably, a sealing ring is installed at the bottom of the inner cavity of the sleeve, and the gaps between the sleeve, the insert and the mounting seat are sealed by welding.

[0006] Preferably, a cylinder is fixedly installed in the inner cavity of one end of the mounting seat, a piston is movably connected to the inner cavity of the cylinder, a screw is fixedly installed on the outer end of the piston, the screw passes through the side wall of the mounting seat and is threadedly connected thereto, and a knob is fixedly installed on the outer end of the screw.

[0007] Compared with the prior art, the beneficial effects of the utility model are as follows: after the adapter is installed, the knob is turned to push the piston inward, the liquid pressure in the mounting seat increases to squeeze the balloon, and the protrusion is used to center and clamp the nozzle of the pipette gun to effectively prevent it from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at BB in the middle.

[0010] In the figure: 1, mounting seat; 2, sleeve; 3, cannula; 4, balloon; 5, bump; 6, cylinder; 7, piston; 8, knob. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0012] See also Figure 1-2 The utility model provides a technical solution: a detachable adapter for a pipette gun, including a connector and a mounting seat 1, the connector including an axially connected sleeve 2 and a cannula 3, the sleeve 2 and the cannula 3 are integrally injection molded, there are 8 or 12 connectors (suitable for row guns), the mounting seat 1 is a rectangular strip-shaped shell, the connectors are arranged at equal intervals along the length direction of the mounting seat 1 and vertically penetrate, the lower end of the cannula 3 extends from the mounting seat 1, and a sealing ring is installed at the bottom of the inner cavity of the sleeve 2. The gap between the sleeve 2, the cannula 3 and the mounting seat 1 is sealed by welding, Figure 1 The figure a in the middle shows the lower nozzle of the pipette.

[0013] A balloon 4 is sleeved on the sleeve 2. The balloon 4 is made of rubber material and has a certain degree of elasticity. The annular joint between the balloon 4 and the sleeve 2 is sealed by adhesive bonding. The inner wall of the balloon 4 is provided with a plurality of evenly distributed protrusions 5 along the circumference. The protrusions 5 radially penetrate from the through holes on the side wall of the sleeve 2. When the inner cavity of the mounting seat 1 is filled with liquid, the balloon 4 is compressed by squeezing the liquid. When the outside of the balloon 4 is squeezed, the protrusions 5 can be pushed to press on the nozzle of the pipette gun to achieve clamping and fixing. A cylinder 6 is fixedly installed in the inner cavity of one end of the mounting seat 1. A piston 7 is movably connected to the inner cavity of the cylinder 6. A screw is fixedly installed on the outer end of the piston 7. The screw penetrates the side wall of the mounting seat 1 and is screwed thereto. A knob 8 is fixedly installed on the outer end of the screw. When the knob 8 is turned to push the piston 7 inward, the liquid inside the mounting seat 1 can be squeezed, and the liquid pressure on the outside of the balloon 4 increases.

[0014] Working principle: When in use, the upper end of the adapter is respectively plugged into the nozzles of each row of gun heads. After the nozzles are inserted into the bottom of the sleeve 2, the knob 8 is turned to push the piston 7 to move inward. The liquid pressure in the mounting seat 1 increases and squeezes the balloon 4, so that each protrusion 5 is centered and moved toward the middle to clamp the nozzle and fix it to prevent it from falling off when replacing the gun head.

[0015] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable adapter for a pipette, comprising a connector and a mounting seat (1), wherein the connector comprises an axially butted sleeve (2) and a cannula (3), wherein the sleeve (2) and the cannula (3) are integrally injection molded, wherein the number of the connectors is 8 or 12, and wherein: The mounting seat (1) is a rectangular long strip shell, the connectors are arranged at equal intervals along the length direction of the mounting seat (1) and vertically penetrate the mounting seat (1), the lower end of the insertion tube (3) extends from the mounting seat (1), the sleeve (2) is sleeved with a balloon (4), the annular joint between the balloon (4) and the sleeve (2) is sealed by adhesive bonding, the inner wall of the balloon (4) is provided with a plurality of evenly distributed protrusions (5) along the circumference, the protrusions (5) penetrate radially from the through holes on the side wall of the sleeve (2), the inner cavity of the mounting seat (1) is filled with liquid, and the balloon (4) is compressed by squeezing the liquid.

2. The detachable adapter for a pipette according to claim 1, characterized in that: A sealing ring is installed at the bottom of the inner cavity of the sleeve (2), and the gaps between the sleeve (2), the insert (3) and the mounting seat (1) are sealed by welding.

3. The detachable adapter for a pipette according to claim 2, characterized in that: A cylinder (6) is fixedly mounted in the inner cavity of one end of the mounting seat (1), a piston (7) is movably connected to the inner cavity of the cylinder (6), a screw is fixedly mounted on the outer end of the piston (7), the screw passes through the side wall of the mounting seat (1) and is threadedly connected thereto, and a knob (8) is fixedly mounted on the outer end of the screw.

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