CN110975956A

CN110975956A - Anti-suck-back electronic pipettor

Info

Publication number: CN110975956A
Application number: CN201911352345.2A
Authority: CN
Inventors: 刘曙霞
Original assignee: Wuhan Qicheng Jiahui Technology Co Ltd
Current assignee: Wuhan Qicheng Jiahui Technology Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-04-10

Abstract

The invention discloses an anti-suck-back electronic pipettor, which comprises a pipettor body and a pipettor shell, wherein the bottom of the inner wall of the pipettor body is fixedly connected with a pipetting cavity, the top of the pipettor body penetrates through a movable pull rod, a functional spring is sleeved on the surface of the movable pull rod and positioned in the pipettor body, the bottom end of the movable pull rod is fixedly connected with a movable piston, and the top end of the movable pull rod is fixedly connected with a horizontal pull plate. This prevent electronic pipettor that suck-backs through improving on the basis at original couple, has add the second fixture block in addition, sets up a draw-in groove in the bottom of second fixture block for the user grips the finger on the palm of pipettor body can both be perfect laminate with the pipettor shell, can make things convenient for the staff to hold the pipettor body and move the liquid operation, makes the convenience more of operation when using the pipettor body, convenient to use.

Description

Anti-suck-back electronic pipettor

Technical Field

The invention relates to the technical field of pipettors, in particular to an anti-suck-back electronic pipettor.

Background

A pipette, also known as a pipette gun, is a device for transferring liquid quantitatively. In conducting analytical testing studies, small or minute amounts of liquid are typically removed using a pipette. Pipettes can be divided into gas piston pipettes and external piston pipettes according to the principle. The gas piston type pipettor is mainly used for standard pipetting, and the external piston type pipettor is mainly used for treating special liquids such as volatile liquid, easy corrosion and viscous liquid. The correct method of use and some of its detailed operation of a pipette is ignored by many people. When the measuring range is adjusted, if the measuring range is adjusted from a large volume to a small volume, the knob is rotated anticlockwise according to a normal adjusting method; however, if the volume is adjusted from a small volume to a large volume, the scale knob can be rotated clockwise to the scale exceeding the measuring range, and then the scale knob is adjusted back to the set volume, so that the highest accuracy of the measurement can be ensured. When the pipette tip is sleeved on the pipette, the pipette (device) is vertically inserted into the pipette tip and slightly rotated left and right with little force to tightly combine the pipette tip and the pipette tip. If the pipette is a multichannel pipette, the first channel of the pipette can be aligned with the first gun head, then the pipette is inserted obliquely, and the pipette can be clamped by shaking forwards and backwards. The tip grip is marked slightly beyond the O-ring and it can be seen that the joint forms a clear seal.

When blood grouping and cross matching are performed in a transfusion department of a hospital, the most used instrument is a pipettor. A cavity is formed in the pipettor body, when a worker operates the pipettor, the pipette pressing rod is pressed downwards by a thumb, and the pipette pressing rod pushes the suction head; the thumb is released, a spring inside the pipettor returns the pipette pressing rod to the original position, the pipettor is a precise instrument, the correct posture needs to be kept during use, the holding force needs to be controlled during use, the existing pipettor is only provided with a hook, the palm holding the pipettor feels aching pain after long-time use, and the work efficiency is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an anti-suck-back electronic pipettor which solves the problems that the palm holding the pipettor feels aching pain and the working efficiency is reduced when the prior pipettors are used for a long time because only one hook is arranged.

In order to achieve the purpose, the invention is realized by the following technical scheme: an anti-suck-back electronic pipettor comprises a pipettor body and a pipettor shell, wherein the bottom of the inner wall of the pipettor body is fixedly connected with a pipetting cavity, a movable pull rod penetrates through the top of the pipettor body, a functional spring is sleeved on the surface of the movable pull rod and positioned inside the pipettor body, the bottom end of the movable pull rod is fixedly connected with a movable piston, the top end of the movable pull rod is fixedly connected with a horizontal pull plate, a first clamping block is fixedly connected above one side of the pipettor body, a second clamping block is fixedly connected above the other side of the pipettor body, the bottom of the second clamping block is provided with a clamping groove, the bottom of the pipettor body is communicated with a connecting pipe, the bottom end of the connecting pipe is movably connected with a reverse suction prevention joint, the bottom of the reverse suction prevention joint is fixedly connected with a suction nozzle, and the bottom of the suction nozzle is communicated with a suction head.

Preferably, the outer surface of pipettor shell is fixedly connected with first solid fixed ring and the solid fixed ring of second respectively, the fixed cover of fixedly connected with between first solid fixed ring and the solid fixed ring of second, the surface of fixed cover is carved with anti-skidding line.

Preferably, the bottom end of the movable pull rod penetrates through the top of the pipetting cavity and extends into the pipetting cavity, and the surface of the movable piston is in sliding connection with the inner surface of the pipetting cavity.

Preferably, an external thread is arranged below the surface of the connecting pipe, a clamping hole is formed in the top of the anti-suck-back joint, and the outer surface of the external thread is in threaded connection with the inner surface of the clamping hole.

Preferably, the through hole has been seted up to the surface that prevents the suck-back joint, the through hole is provided with a plurality of, and all with the surface of distributing in preventing the suck-back joint.

Preferably, the inner surface of the anti-suck-back joint is fixedly connected with a filter element, the anti-suck-back joint is of a cylindrical structure, and the diameter of the outer surface of the anti-suck-back joint is smaller than that of the inner surface of the suction nozzle.

Advantageous effects

The invention provides an anti-suck-back electronic pipettor. Compared with the prior art, the method has the following beneficial effects:

(1) the anti-suck-back electronic pipettor is characterized in that a liquid transfer cavity is fixedly connected to the bottom of the inner wall of a pipettor body, a movable pull rod penetrates through the top of the pipettor body, a functional spring is sleeved on the surface of the movable pull rod and positioned in the pipettor body, a movable piston is fixedly connected to the bottom end of the movable pull rod, a horizontal pull plate is fixedly connected to the top end of the movable pull rod, a first clamping block is fixedly connected to the upper part of one side of the pipettor body, a second clamping block is fixedly connected to the upper part of the other side of the pipettor body, a clamping groove is formed in the bottom of the second clamping block, a connecting pipe is communicated with the bottom of the connecting pipe, an anti-suck-back joint is movably connected to the bottom of the anti-suck-back joint, a suction nozzle is fixedly connected to the bottom of the suction nozzle, the, make the user grip the finger on the palm of pipettor body can both be perfect with the laminating of pipettor shell, can make things convenient for the staff to hold the pipettor body and move the liquid operation for operation convenience more when using the pipettor body, convenient to use.

(2) This prevent electronic pipettor that draws back, through the first solid fixed ring of fixedly connected with and the solid fixed ring of second respectively at the surface of pipettor shell, the fixed cover of fixedly connected with between first solid fixed ring and the solid fixed ring of second, the surface of fixed cover is carved with anti-skidding line, through setting up the solid fixed ring of first solid fixed ring and second, can carry on spacingly to the palm, when not using the pipettor body, can grasp fixed cover with the hand, alleviate and use finger centre gripping pipettor body and bring tired out sense for the finger, improve the comfort level.

(3) The anti-suck-back electronic pipettor comprises a movable pull rod, a movable piston, a connecting pipe, a clamping hole, a plurality of through holes and a plurality of anti-suck-back joints, wherein the bottom end of the movable pull rod penetrates through the top of a liquid transferring cavity and extends into the liquid transferring cavity, the surface of the movable piston is in sliding connection with the inner surface of the liquid transferring cavity, the outer surface of the connecting pipe is provided with an outer thread, the top of the anti-suck-back joints are provided with the clamping hole, the outer surface of the outer thread is in threaded connection with the inner surface of the clamping hole, the outer surface of the anti-suck-back joints is provided with a plurality of through holes which are distributed on the outer surface of the anti-suck-back joints, the inner surface of the anti-suck-back joints is fixedly connected with a filter core, the appearance of the, the inside of suction nozzle is provided with the filter core, can play hydrophobic and liquid suck-back's effect when using, can pass through the air simultaneously to filter it, thereby protected the inner system of pipettor body can not damage because of the liquid refluence, ensured going on smoothly of experiment process, avoided unnecessary economic loss, had higher market value and practical prospect.

Drawings

FIG. 1 is a front view of the internal structure of the present invention;

FIG. 2 is an enlarged view of a portion of the invention at A in FIG. 1;

FIG. 3 is a front view of the outer structure of the present invention;

FIG. 4 is a bottom view of the external structure of the anti-suck back joint of the present invention;

FIG. 5 is a partial front view of the internal structure of the suction nozzle of the present invention;

FIG. 6 is a top view of the internal structure of the anti-suck back joint of the present invention;

FIG. 7 is a partial front view of the internal structure of the pipetting chamber of the invention.

In the figure: the liquid transfer device comprises a liquid transfer device body, a liquid transfer device shell 2, a liquid transfer cavity 3, a movable pull rod 4, a functional spring 5, a movable piston 6, a horizontal pull plate 7, a first fixture block 8, a second fixture block 9, a clamping groove 10, a connecting pipe 11, an anti-suck-back connector 12, a suction nozzle 13, a suction head 14, a first fixing ring 15, a second fixing ring 16, a fixing ring 17, an external thread 18, a clamping hole 19, a through hole 20 and a filter element 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: an anti-suck-back electronic pipettor comprises a pipettor body 1 and a pipettor shell 2, a first fixing ring 15 and a second fixing ring 16 are fixedly connected to the outer surface of the pipettor shell 2 respectively, a fixing sleeve 17 is fixedly connected between the first fixing ring 15 and the second fixing ring 16, the fixing sleeve 17 is made of rubber materials, anti-skid lines are carved on the surface of the fixing sleeve 17, the friction force with a palm part can be increased by carving the anti-skid lines, the pipettor body 1 is prevented from falling off from a hand, the protection performance is improved, the palm can be limited by arranging the first fixing ring 15 and the second fixing ring 16, when the pipettor body 1 is not used, the fixing sleeve 17 can be grasped by a hand, the fatigue feeling of fingers caused by clamping the pipettor body 1 by the fingers is relieved, the comfort level is improved, a pipetting cavity 3 is fixedly connected to the bottom of the inner wall of the pipettor body 1, a perforation, the bottom of the liquid transferring cavity 3 is communicated with the bottom of the liquid transferring cavity 1, a movable pull rod 4 penetrates through the top of the liquid transferring cavity 1, the bottom end of the movable pull rod 4 penetrates through the top of the liquid transferring cavity 3 and extends into the liquid transferring cavity 3, a functional spring 5 is sleeved on the surface of the movable pull rod 4 and positioned inside the liquid transferring cavity 1, the movable pull rod 4 can reset by arranging the functional spring 5, a movable piston 6 is fixedly connected to the bottom end of the movable pull rod 4, the movable piston 6 is made of rubber materials, a horizontal pull plate 7 is fixedly connected to the top end of the movable pull rod 4, a user can conveniently pull the movable pull rod 4 by arranging the horizontal pull plate 7, the use efficiency is improved, a first clamping block 8 is fixedly connected to the upper portion of one side of the liquid transferring cavity 1, a second clamping block 9 is fixedly connected to the upper portion of the other side of the liquid transferring, the bottom of the pipettor body 1 is communicated with a connecting pipe 11, the lower part of the surface of the connecting pipe 11 is provided with an external thread 18, the top of the anti-suck-back joint 12 is provided with a clamping hole 19, the outer surface of the anti-suck-back joint 12 is provided with a plurality of through holes 20, the through holes 20 can pass through air and filter the air, thereby protecting the internal system of the pipettor body 1 from being damaged due to liquid backflow and uniformly distributed on the outer surface of the anti-suck-back joint 12, the connecting pipe 11 is matched with the anti-suck-back joint 12 and the pipettor body 1 through the thread 18 at the lower end by being provided with the anti-suck-back joint 12, meanwhile, the anti-suck-back joint 12 is placed in a suction nozzle 13, the internal of the suction nozzle 13 is provided with a filter element 21, the effects of draining and liquid backflow can be achieved when in use, meanwhile, the air can be passed through and filter, the smooth proceeding of the experimental process is ensured, unnecessary economic loss is avoided, the device has higher market value and practical prospect, the inner surface of the anti-suck-back joint 12 is fixedly connected with the filter element 21, the filter element 21 is made of ultra-high molecular polyethylene, the appearance of the anti-suck-back joint 12 is of a cylindrical structure, the outer surface diameter of the anti-suck-back joint 12 is smaller than the inner surface diameter of the suction nozzle 13, the outer surface of the external thread 18 is in threaded connection with the inner surface of the clamping hole 19, when the meshes of the filter element 21 are blocked through the design, the anti-suck-back joint 12 is convenient to replace, the use is convenient, the connecting pipe 11 is made of PP plastic, the bottom end of the connecting pipe 11 is movably connected with the anti-suck-back joint 12, the anti-suck-back joint 12 is arranged, the effects of drainage and liquid suck-, thereby protected pipettor body 1's internal system can not damage because of the liquid refluence, the going on smoothly of experiment process has been ensured, unnecessary economic loss has been avoided, higher market value and practical prospect have, prevent that suck-back joint 12 adopts the PP plastics material to make, prevent suck-back joint 12's bottom fixedly connected with suction nozzle 13, suction nozzle 13's bottom intercommunication has suction head 14, through improving on the basis of original couple, second fixture block 9 has been add in addition, a draw-in groove 10 is seted up to the bottom at second fixture block 9, make the user grip the finger on the palm of pipettor body 1 can both be perfect laminate with pipettor shell 2, can make things convenient for the staff to hold pipettor body 1 and carry out the liquid-transfering operation, make the operation when using pipettor body 1 more convenient, and convenient for use.

When the liquid transfer device works, a suction head 14 is placed in liquid, a user is clamped at a first clamping block 8 by a forefinger, a little finger is placed at a clamping groove 10, the rest fingers clamp the liquid transfer device body 1, the improvement is carried out on the basis of the original hook, a second clamping block 9 is additionally arranged, the bottom of the second clamping block 9 is provided with the clamping groove 10, the fingers on the palm of the user holding the liquid transfer device body 1 can be perfectly attached to a liquid transfer device shell 2, the liquid transfer device body 1 can be conveniently held by a worker to carry out liquid transfer operation, the operation when the liquid transfer device body 1 is used is more convenient, the use is convenient, the horizontal pull plate 7 is upwards pulled by the other hand to drive the movable pull rod 4 to upwards move, and then the functional spring 5 is in a compressed state, in the pulling process, the liquid enters from the suction head 14 and then enters the suction nozzle 13, the anti-, finally enters the interior of the liquid transferring cavity body 3, the anti-suck-back joint 12 is arranged, the connecting pipe 11 is matched with the anti-suck-back joint 12 and the liquid transferring device body 1 through the thread 18 at the lower end, meanwhile, the anti-suck-back joint 12 is placed in the suction nozzle 13, the filter element 21 is arranged in the suction nozzle 13, the functions of drainage and liquid suck-back can be realized when in use, meanwhile, air can be passed through and filtered, thereby the internal system of the liquid transferring device body 1 is protected from being damaged due to liquid backflow, the smooth proceeding of the experiment process is ensured, unnecessary economic loss is avoided, the liquid transferring device has higher market value and practical prospect, when the liquid transferring device body 1 is not used, the finger is not tired due to the fact that the finger is clamped by the finger, the fixing sleeve 17 can be held by hand, through the arrangement of the first fixing ring 15 and the second fixing, can carry on spacingly to the palm, alleviate and use finger centre gripping pipettor body 1 and bring tired sense for the finger, improve the comfort level.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent electronic pipettor that suck-back, includes pipettor body (1) and pipettor shell (2), its characterized in that: the bottom of the inner wall of the pipettor body (1) is fixedly connected with a pipettor cavity (3), a movable pull rod (4) penetrates through the top of the pipettor body (1), a functional spring (5) is sleeved on the surface of the movable pull rod (4) and positioned inside the pipettor body (1), a movable piston (6) is fixedly connected with the bottom of the movable pull rod (4), a horizontal pull plate (7) is fixedly connected with the top of the movable pull rod (4), a first clamping block (8) is fixedly connected with the upper part of one side of the pipettor body (1), a second clamping block (9) is fixedly connected with the upper part of the other side of the pipettor body (1), a clamping groove (10) is formed in the bottom of the second clamping block (9), a connecting pipe (11) is communicated with the bottom of the pipettor body (1), and an anti-suck-back joint (12) is movably connected with the bottom of, the bottom of the anti-suck-back joint (12) is fixedly connected with a suction nozzle (13), and the bottom of the suction nozzle (13) is communicated with a suction head (14).

2. An anti-suck-back electronic pipette as defined in claim 1, wherein: the outer surface of pipettor shell (2) is fixed connection with first solid fixed ring (15) and the solid fixed ring of second (16) respectively, fixed cover (17) of fixed connection between first solid fixed ring (15) and the solid fixed ring of second (16), the surface of fixed cover (17) is carved and is equipped with anti-skidding line.

3. An anti-suck-back electronic pipette as defined in claim 1, wherein: the bottom of activity pull rod (4) runs through the top of pipetting cavity (3) and extends to the inside of pipetting cavity (3), the surface of removal piston (6) and the internal surface sliding connection of pipetting cavity (3).

4. An anti-suck-back electronic pipette as defined in claim 1, wherein: an external thread (18) is arranged below the surface of the connecting pipe (11), a clamping hole (19) is formed in the top of the anti-suck-back joint (12), and the outer surface of the external thread (18) is in threaded connection with the inner surface of the clamping hole (19).

5. An anti-suck-back electronic pipette as defined in claim 1, wherein: the outer surface of the anti-suck-back joint (12) is provided with a plurality of through holes (20), and the through holes (20) are distributed on the outer surface of the anti-suck-back joint (12).

6. An anti-suck-back electronic pipette as defined in claim 1, wherein: the internal surface fixed connection who prevents suck-back connects (12) has filter core (21), the appearance that prevents suck-back connects (12) is cylindrical structure, and the external surface diameter that prevents suck-back connects (12) is less than the internal surface diameter of suction nozzle (13).