CN218422881U - Liquid-transfering gun head with prevent stifled function - Google Patents

Abstract

The utility model provides a liquid-transfering gun head with prevent stifled function, including liquid-transfering gun head body, divide into joint section, changeover portion, refute and connect section, suction nozzle section design cover establishes the filter mantle, can keep apart cotton swab fibre and other deposits outside liquid-transfering gun head income edge, avoids these materials to block up liquid-transfering gun head, and can use the filter mantle to oppress the cotton swab that is full of buffer solution and force these buffer solutions to flow out and be convenient for liquid-transfering gun head to absorb, convenient sample; meanwhile, the top end of the bottom of the filter cover is provided with a conical bottom hole larger than the orifice of the suction nozzle section, and when the pipette tip is lifted upwards, the plug is automatically separated from the filter cover by virtue of the outflow pressure of liquid in the filter cover and the dead weight of the plug, so that the sample is not hindered from being transferred.

Description

Liquid-transfering gun head with prevent stifled function

Technical Field

The utility model relates to a medical treatment detects technical field, in particular to liquid-transfering gun head with prevent stifled function.

Background

Pipettors are commonly used in laboratories for the removal of small or minute quantities of liquid. Pipettes of different specifications are matched with pipette tips of different sizes, the shapes produced by different manufacturers are slightly different, but the working principle and the operation method are basically consistent. The pipette tip is the consumptive material of using with the pipettor is supporting, and the tip in the pipettor is mostly disposable suction head at present to the link suit of pipette tip.

In laboratory testing work, a considerable part of buffer solution in the sampling tube permeates into the cotton swab of the swab, and the buffer solution in the cotton swab is in a saturated state. The buffer solution in a free flowing state is less, the cotton swab soaked with the buffer solution in a limited space range occupies most of the space at the bottom of the sampling tube in a saturated and expanded state, and when the common pipette tip is inserted into the bottom of the sampling tube for sampling and pipetting, the common pipette tip needs to be carefully avoided, and the suction nozzle of the pipette tip is inserted into the peripheral space of the cotton swab to suck liquid. If the suction nozzle is inserted into a cotton swab, the fibres of the cotton swab will block the suction nozzle of the pipette tip. And even if the liquid is absorbed at the periphery of the saturated cotton swab, the cotton swab fibers can be driven to gather towards the suction nozzle and block the orifice of the suction nozzle due to the flowing of the liquid. Resulting in a failure in the operation of sucking and moving the liquid.

In order to solve the problem that the pipette tip is easy to block, a pipette tip with an anti-blocking function must be developed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a liquid-transfering gun head with prevent stifled function to prior art's problem, designs the filter mantle, solves current technical problem.

The utility model aims at realizing through the following technical scheme:

the utility model provides a liquid-transfering gun head with prevent stifled function, includes liquid-transfering gun head body, liquid-transfering gun head body is sectional type hollow body structure, liquid-transfering gun head body upper end is the joint segment, sealing connection can be dismantled with outside pipettor to the joint segment upper end, the changeover portion of joint segment lower extreme structure as an organic whole, the changeover portion lower extreme refutes the section of connecing of structure as an organic whole, refute the suction nozzle section of connecing section lower extreme structure as an organic whole, the suction nozzle section is for leaking hopper-shaped down and the bottom is equipped with an drill way, refute section waist and be provided with annular protruding area, refute and connect the annular protruding area of section and go up closely the cover and be equipped with the filter mantle, filter mantle lower extreme shape corresponds to entangling and is provided with filtration micropore on suction nozzle section and the outer wall, filter mantle bottom top is provided with the awl bottom hole that the aperture is greater than suction nozzle section drill way.

Further, the filter mantle upper end is the joint, the joint can closely cup joint on refuting the annular bellied area of section, the reducing cover of joint lower extreme structure as an organic whole, the conical cover of reducing cover lower extreme structure as an organic whole, conical cover shape corresponds to be provided with the filtration micropore on covering suction nozzle section and the outer wall, conical cover bottom top is provided with the awl bottom outlet that the aperture is greater than suction nozzle section drill way.

Further, the number of the filter micropores is one or more.

The beneficial effects of the utility model reside in that:

the filter cover is designed and sleeved at the suction nozzle section at the lower end of the pipette head, cotton swab fibers and other precipitates can be isolated outside the entering edge of the pipette head, the pipette head is prevented from being blocked by the substances, and the filter cover can be used for pressing the cotton swabs saturated with buffer solution to force the buffer solution to flow out so as to facilitate the suction of the pipette head and the sampling; meanwhile, the top end of the bottom of the filter cover is provided with a conical bottom hole which is larger than the orifice of the suction nozzle section, and when the pipette tip is lifted upwards, the plug is automatically separated from the filter cover by virtue of the outflow pressure of liquid in the filter cover and the dead weight of the plug, so that the sample is not hindered from being transferred.

Drawings

FIG. 1 is a schematic view of a structure of a liquid-transfering gun head with an anti-blocking function according to the present invention;

fig. 2 is the utility model discloses in have the liquid-transfering gun head split cross-section sketch map of preventing stifled function.

The reference numerals are explained below:

1 is a pipette tip body, 101 is a joint section, 102 is a transition section, 103 is a connection section, 104 is a suction nozzle section, 105 is an orifice, 106 is an annular raised belt, 2 is a filter cover, 201 is a filter micropore, 202 is a conical bottom hole, 203 is a connection joint, 204 is a reducing cover, and 205 is a conical cover.

Detailed Description

The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure of the present disclosure. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

In order to prevent blocking the pipette tip and facilitate use, the utility model discloses specific content is as follows.

With reference to fig. 1 and fig. 2, an embodiment of the present invention is a pipette tip with an anti-blocking function, and importantly, the pipette tip includes a pipette tip body 1, the pipette tip body 1 is a segmented hollow body structure, the upper end of the pipette tip body 1 is a joint section 101, the upper end of the joint section 101 can be detachably and hermetically connected to an external pipette, the joint section 101 is a hollow tubular body, the inner wall of the tube is different according to the joint setting of the pipette, and is correspondingly provided with a thread, a groove, a clamping groove, etc., the pipette tip and the pipette joint are tightly connected in a sleeved manner, so that the pipette tip and the pipette are integrated into a whole, and the joint has good sealing performance through the thread, a sealing ring and elastic deformation, so that the pipette and the pipette are not easy to fall off during normal operation of the pipette and the pipette, but the pipette tip and the pipette gun can be conveniently separated by using an auxiliary device, which is declared as an existing basic connection mode of the pipette tip, and will not be described in detail herein;

the lower end of the joint section 101 is provided with a transition section 102 of an integrated structure, the transition section is a hollow tubular body, the inner wall of the transition section is smooth, and the transition section has the function of storing liquid sucked into the pipe;

the lower end of the transition section 102 is a connection section 103 of an integrated structure, which is a tubular body with a diameter smaller than that of the inner wall of the transition section 102 and a smooth inner wall, the upper edge of the connection section is connected with the lower end of the transition section 102 in a variable diameter mode, and the lower end of the connection section is connected with the suction nozzle section 104 in a mode;

the lower end of the connection section 103 is a suction nozzle section 104 with an integrated structure, the suction nozzle section 104 is downward funnel-shaped and is provided with an orifice 105 at the bottom, and liquid is sucked into the liquid storage space of the liquid-transferring gun body 1 from the orifice 105 through the negative pressure;

the waist of the connection section 103 is provided with an annular convex belt 106, the annular convex belt 106 of the connection section 103 is tightly sleeved with the filter cover 2, when the filter cover 2 is sleeved on the connection section 103, the annular convex belt 106 and the outer side surface of the connection section 103 generate larger friction force to the inner wall of the joint of the filter cover 2 together, so that the filter cover 2 is tightly sleeved on the connection section 103 of the liquid transfer gun body 1, and the filter cover 2 is not easy to fall off during liquid suction operation;

the shape of the lower end of the filter cover 2 correspondingly covers the suction nozzle section 104, the outer wall of the filter cover is provided with filtering micropores 201, and the filter cover 2 has certain structural strength; by the design, the filter cover 2 is sleeved on the suction nozzle section 104 at the lower end of the pipette head, so that cotton swab fibers and other precipitates can be isolated outside the inlet edge of the pipette head, the pipette head is prevented from being blocked by the substances, and the filter cover 2 can be used for pressing the cotton swabs saturated with buffer solution to force the buffer solution to flow out so as to facilitate the suction of the pipette head and the sampling;

the top end of the bottom of the filter cover 2 is provided with a conical bottom hole 202 with the aperture larger than the aperture 105 of the suction nozzle section 104, and the aperture of the conical bottom hole 202 is larger than the aperture of the filter micropore 201 on the filter cover and is slightly larger than the aperture 105 of the suction nozzle section 104; by the design, when the pipette tip is lifted upwards, the plug is automatically separated from the filter cover by the outflow pressure of liquid in the filter cover and the dead weight of the plug, so that a sample is not hindered to be transferred.

More specifically, the upper end of the filter mantle 2 is a sleeve joint 203, and the sleeve joint 203 can be tightly sleeved on the annular raised belt 106 of the connection section 103;

the lower end of the sleeve joint 203 is provided with a reducing cover 204 of an integrated structure, which plays a role of transition;

the lower end of the reducing cover 204 is a conical cover 205 with an integrated structure, the conical cover 205 is correspondingly sleeved on the suction nozzle section in shape, the outer wall of the conical cover 205 is provided with one or more filtering micropores 201, the conical cover 205 is an inverted conical shell, and the shell is provided with a plurality of micropores. Through these pores, the solution in the sampling tube can flow into the interior of the filter housing 2, and can prevent the cotton swab fiber and other precipitates from outside the housing; particularly, an obvious mark is further arranged outside the shell of the conical cover 205 to mark the position of the hole edge of the suction nozzle section 104 in the filter cover 2, when the mark is submerged in the solution in the sampling tube, the mark indicates that the hole edge of the suction nozzle section 104 is also submerged in the liquid level in the sampling tube, so that the phenomenon that air is sucked because the hole edge of the suction nozzle section is higher than the liquid level of the solution to cause suction is avoided;

the top end of the bottom of the conical cover 205 is provided with a conical bottom hole 202 with the aperture larger than the aperture 105 of the suction nozzle section 104, the aperture of the conical bottom hole 202 is larger than the aperture of the filter micropore 201 on the filter cover and is slightly larger than the aperture 105 of the suction nozzle section 104, when the pipette tip is lifted upwards, the plug automatically separates from the filter cover by the outflow pressure of liquid in the filter cover and the dead weight of the plug, and the sample is not hindered from being transferred.

The filter cover 2 can be made by injection molding and other processes and then is subjected to hydrophobic treatment, the filter cover has good hydrophobic property, when the gun head is lifted above the liquid level in the tube, the solution which enters the filter cover before can rapidly flow out from the filtering micropores 201 of the filter cover 2 and the conical bottom hole 202 at the bottom of the filter cover 2 and return to the sampling tube, and simultaneously, the fibers and other sediments attached to the outer side of the filter cover 2 are released. After being lifted out of the sampling tube, no liquid is retained in the filter cover 2. This has the advantage of preventing the solution in the sampling tube from being carried out of the tube by the filter cap 2, and improving the pipetting metering accuracy.

The above description is for illustrative purposes only and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. that do not depart from the spirit and principles of the present invention should be construed as within the scope of the present invention.

Claims (3)

1. The utility model provides a liquid-transfering gun head with prevent stifled function which characterized in that: including the pipette head body, the pipette head body is sectional type hollow body structure, pipette head body upper end is the joint segment, sealing connection can be dismantled with outside pipettor to the joint segment upper end, the changeover portion of joint segment lower extreme structure as an organic whole, the refute section of changeover portion lower extreme structure as an organic whole, refute the suction nozzle section of section lower extreme structure as an organic whole, the suction nozzle section is for leaking hopper-shaped down and the bottom is equipped with an drill way, refute the section waist and be provided with annular protruding area, refute the section annular protruding and take and closely overlap and be equipped with the filter mantle, be provided with filtration micropore on filter mantle lower extreme shape corresponds the sleeved suction nozzle section and the outer wall, filter mantle bottom top is provided with the awl bottom outlet that the aperture is greater than the suction nozzle section drill way.

2. A pipette tip having an anti-clogging function according to claim 1, characterized in that: the filter mantle upper end is cup jointed the head, cup joint the head and can closely cup joint on refuting the annular bellied area of section of connecing, the reducing cover of cup joint lower extreme structure as an organic whole, the conical cover of reducing cover lower extreme structure as an organic whole, conical cover shape corresponds to entangle and is provided with the filtration micropore on suction nozzle section and the outer wall, conical cover bottom top is provided with the awl bottom hole that the aperture is greater than suction nozzle section drill way.

3. A pipette tip having an anti-clogging function according to claim 1, characterized in that: the number of the filter micropores is one or more.

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