CN201558707U - Adjustable liquid transfer device and adjusting device thereof - Google Patents
Adjustable liquid transfer device and adjusting device thereof Download PDFInfo
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- CN201558707U CN201558707U CN2009201669915U CN200920166991U CN201558707U CN 201558707 U CN201558707 U CN 201558707U CN 2009201669915 U CN2009201669915 U CN 2009201669915U CN 200920166991 U CN200920166991 U CN 200920166991U CN 201558707 U CN201558707 U CN 201558707U
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Abstract
The utility model provides an adjusting device arranged in a housing of a liquid transfer device. The housing comprises the axial line; the adjusting device comprises a fixing part, a screw rod, an elastic part, a button and a stop part, wherein the fixing plate is arranged in the housing in the way of being incapable of moving relative to the housing; the screw rod comprises a button connecting end and a piston end, and the screw rod is arranged in the way of being incapable of rotating but capable of moving along the axial line; the elastic part is arranged in a pressed way, one end of the elastic part is connected with the screw rod, the other end is connected with the fixing part, and the pressure borne by the elastic part reacts on the screw rod for leading the screw rod to move to the piston end; the button comprises a connecting end and an operating end, and the button is in threaded connection with the button connecting end of the screw rod; and the stop part limits the stroke of moving along the axial line of the screw rod relative to the fixing part. The utility model further provides an adjustable liquid transfer device containing the adjusting device.
Description
Technical field
The utility model relates to the liquid instrument that moves that liquid is used that moves that fields such as chemistry, medical and health and biology use, and particularly adjustable pipette also relates to the adjusting device of adjustable pipette.
Background technology
The operation principle of pipettor mainly is to utilize the straight line of pipettor internal proprietary piston in piston cylinder to move to change the piston cylinder internal capacity, thereby realizes the absorption or the discharge of liquid, reaches the purpose of quantitative transfer liquid.Pipettor suction amount of liquid is by the variable quantity decision of piston cylinder internal capacity, the mode that existing adjustable pipette adopts is normally passed through adjusting device, change piston rest point position on request and realize the variation of piston/cylinder volume, utilize the effect of one-level spring force to make piston get back to initial position.In the adjusting device of a lot of existing pipettors, spring stress is in poor shape.In the structure of Biohit pipettor, spring is in the lower end-piece position, is easy to be subjected to the pollution of liquid, causes corrosion, has shortened the service life of spring, even the phenomenon that fractures is arranged, and also brings bad feel to the operator.
A kind of adjusting device is disclosed in the U.S. application for a patent for invention publication number US2002/0041833A1 of " adjustable pipette " by name, when adjusting liquid absorption, the length of the spring in the adjusting device will change, bring corresponding STRESS VARIATION thereupon, thereby operating handle differs when making each capacity, and the position of spring is polluted easily by down.Also disclose a kind of adjustable pipette in the U.S. application for a patent for invention publication number US2005039550A1 of " mechanical piston pipettor " by name, when adjusting liquid absorption, the length of adjusting device medi-spring also can change.A kind of adjusting device is disclosed in the Europatent application publication number EP1230979A2 of " volume adjustable pipettor " by name, here, though one-level spring length does not change when adjusting, because the position of two-level spring is by following, near piston, polluted than being easier to.
Also disclose a kind of adjustable pipette in the application for a patent for invention publication number CN1248495A of " quick adjustable pipette " by name, when adjusting, spring length also can change.A kind of adjustable pipette is disclosed in the utility application 200820009938.X of " adjustable pipette and adjusting device thereof " by name, when adjusting, one-level spring length does not change, but because the one-level spring is in pretensioned state usually, this may significantly shorten the life-span of pipettor and adjusting device thereof.
In addition, people wish to obtain having numeral and show and adjust sound try one's best little pipettor and adjusting device thereof.
Summary of the invention
At the problems referred to above, the purpose of this utility model is to provide a kind of adjustable pipette and adjusting device thereof, its total is stressed rationally, when in setting range, adjusting capacity, one-level spring starting force is constant all the time, and makes one-level spring initial stressed state be in required minimum of a value all the time, and makes the one-level spring avoid being in extended state, prolong the life-span of one-level spring and the service life of pipettor thus, also reduce the fatigue damage of operator's thumb as far as possible.
Therefore, the utility model proposes a kind of adjusting device of adjustable pipette, it is arranged in the pipettor shell, and this shell has axis.Adjusting device comprises: fixture is provided with in the enclosure in the mode that can not opposite shell moves; Screw rod has button link and piston end and with non-rotatable but can be provided with along the mode that above-mentioned axis moves; Elastic component is arranged to an end and screw rod joins and the other end and fixture join in the pressurized mode, and the suffered pressure of elastic component reacts on screw rod and moves to its piston end direction; Button with link and operating side, button is threaded with the button link of screw rod at link; Stop part, it limits the stroke that screw rod relative fixed part moves along above-mentioned axis.
In addition, the utility model also provides a kind of adjusting device of adjustable pipette, and it is arranged in the shell with axis of this pipettor.This adjusting device comprises: fixture, can not be arranged in this shell relative to the mode that this shell moves; Screw rod, this screw rod has button link and piston end, and this screw rod is with non-rotatable but can be provided with along the mode that this axis moves; Elastic component, this elastic component are configured to an end under compressive state and this screw rod joins and the other end and this fixture join, and the suffered pressure of this elastic component reacts on this screw rod and moves to its piston end direction; Button with link and operating side, this button is threaded with the button link of this screw rod at this link; Be arranged near the stop part of this button link, this stop part limits the stroke that this screw rod moves along this axis relative to this fixture.
According to further embodiment of the present utility model, stop part is being connected to fixture along the mode that described axis moves.Above-mentioned elastic component is the one-level spring normally.In according to a preferred embodiment of the present utility model, adjusting device also comprises two-level spring, and one terminates to stop part, and the other end is received fixture.Preferably, two-level spring is a stage clip.
In a preferred embodiment of the present utility model, adjusting device also comprises fine-tuning nut, and fine-tuning nut is threaded with fixture, and this fine-tuning nut one end is against described stop part.
According to the further feature of the utility model, adjusting device also comprises the thrust ring that is enclosed within on the screw rod, the maximum height that the engagement limits screw rod of thrust ring and screw rod can reach.
In a preferred embodiment, adjusting device has digital display device, it comprises digital regulating sleeve, at least one counting ring and gear, digital regulating sleeve is installing with the mode that PBU pushbutton unit rotates synchronously, counting ring is installing around the mode of above-mentioned axis rotation, the number of wherein said gear is no less than the counting ring number, digital regulating sleeve and counting ring all have moving tooth, and the moving tooth of gear and digital regulating sleeve and counting ring mesh simultaneously and/or mesh simultaneously with the moving tooth of a counting ring and an adjacent counting ring.
According to preferred embodiment of the utility model, adjusting device also has digital display device.This digital display device comprises digital regulating sleeve, at least one counting ring and first gear.Wherein should install in the mode of rotating synchronously by the number regulating sleeve with this button.This counting ring is installing around the mode of this axis rotation.This number regulating sleeve has moving tooth, and the top of this counting ring has the tooth around its periphery.The tooth on the moving tooth of this number regulating sleeve and the top of adjacent counting ring is with this first gears engaged.
According to further embodiment, this digital display device also comprises at least one second gear.Described at least one counting ring comprises a plurality of counting rings.In two adjacent counting rings, have moving tooth near the counting ring of this number regulating sleeve in the bottom, the moving tooth of this counting ring and the tooth on the periphery of the top of another counting ring all with same second gears engaged.
In order to guarantee the digital effect that shows, be preferably with tooth on the digital lower surface of reconciling cover, fixture with face that this lower surface engages on have and the intermeshing tooth of described tooth.
More preferably, also have noiseless mechanism, it comprises button and push rod, one end butt button of push rod, other end butt digital display device, this push rod have motionless fulcrum and push rod can rotate around fulcrum, thereby can realize noiseless adjusting when the rotary knob device.
The utility model also provides a kind of adjustable pipette, the ozzle that it has shell, be connected with shell connects part, is installed in adjusting device and the piston that is connected with adjusting device in the shell, and wherein this adjusting device is according to above-mentioned adjusting device of the present utility model.
According to further feature, pipettor also comprises damper rod, the ozzle that it is placed in pipettor in mode that can not axially-movable connects the inside of part, its excircle is provided with the labyrinth type air flue, participate in the working gas volume thereby reduce, reduced the error of moving liquid, and effectively stoped the liquid upper punch, prevented the pollution of liquid internal structure.
Pipettor also comprises and moves back head unit, and it comprises and is installed in moving back a device button and moving back a device spring of enclosure.
The one-level spring is placed on the screw rod, and when range was adjusted, screw rod did not move, and the selection of its length guarantees that it connects with screw rod and fixture under preloading condition.This structure guarantees to set up arbitrarily pipettor in allowing range of capacity, the spring starting force all equals precompression, and this precompression is the optimum value that can set in advance, like this, can make total be subjected to minimum force, avoid unnecessary stress and prolong service life of spring, and when high-temperature sterilization, also can avoid the working of plastics distortion, keep the precision of whole pipettor.Power with optimum value also makes the operator have the same feel when each the use, and it can not alleviate hand fatigue thus because of the capacity adjustment changes.
Two-level spring is placed between stop part and the digital regulating sleeve.When the one-level spring produced pipetting, this two-level spring arrived the two-level spring position of setting, and when breaking through downwards, produced one-level spring and two-level spring and made a concerted effort, and the effect that this makes a concerted effort to have breakthrough power is used to drain liquid.Because add the active force of two-level spring on one-level spring force basis again, so two-level spring does not need very big spring rate, the operator can be easy to judge this position and play good effect.Simultaneously, one-level spring and two-level spring all are arranged on pipettor top, greatly about the handle position height, so, even institute's imbibition body has volatility or liquid upper punch when imbibition, can not pollute spring, thereby prolonged spring life, made spring be in good user mode all the time.
Description of drawings
Below, describe embodiment of the present utility model in conjunction with the accompanying drawings in detail, wherein:
Fig. 1 is the front view of the embodiment of adjustable pipette;
Fig. 2 is the profile of the embodiment of adjustable pipette;
Fig. 3 shows the adjusting device of the adjustable pipette embodiment of Fig. 2;
The operation principle of Fig. 4 a and Fig. 4 b contrast expression adjusting device;
Fig. 5 a and Fig. 5 b contrast table are shown in the starting force that the adjusting device medi-spring is subjected to;
Fig. 6 shows the noiseless mechanism in the adjustable pipette.
The specific embodiment
Below, feature and the function to embodiment of the present utility model elaborates in conjunction with the accompanying drawings.
Fig. 1 is the front view according to adjustable pipette of the present utility model, and it comprises the shell 2 that is used for directly holding and having for the operator axis x-x.One end and the ozzle of shell 2 connects part 4 and is threaded, and the end that ozzle connects part 4 can connect suction nozzle, is used for imbibition.In the connecting the opposite other end of part 4 with ozzle and be provided with and move back a device button 1 of shell 2, be used for driving and move back a device 3 so that suction nozzle is pushed away., clearly do not stipulate the shape of shell 2 here, grip and operation as long as it is beneficial to.
Fig. 2 is the cutaway view according to adjustable pipette of the present utility model, has specifically illustrated the adjusting device 5 of adjustable pipette shown in Figure 1.In Fig. 2, damper rod 17 is arranged on ozzle and connects in the part 4, is formed with the labyrinth type air flue in the periphery of damper rod 17.The damper rod that is provided with the labyrinth type air flue is the volume for the gas that reduces participation work, reduces and moves the liquid error and effectively stop the liquid upper punch, to prevent the pollution of liquid to internal structure.
Describe the composition of the adjusting device of adjustable pipette in detail below in conjunction with Fig. 3.Adjusting device 5 is arranged in the shell 2, and comprises in mode that can not relative motion and be installed in that fixed covers 21 in the shell 2 overlap the shape fixture in other words and can not the relative motion mode to be installed in the fast pulley 14 on the fixed cover 21.What can expect is that fixed cover 21 and fast pulley 14 can be made into integration.This adjusting device 5 also has screw rod 11 non-rotatable but that can move along axis x-x.For this reason, for example in an embodiment of the present utility model,, screw rod 11 can be moved along axis x-x but can't rotate by feather key is set on fast pulley.But, also can realize by other means or the mechanism that those skilled in the art knew.Screw rod 11 comprises button link and the piston end that is used to be connected piston 15, and wherein piston 15 is connected at this piston end place with screw rod 11.Preferably, above-mentioned connection is that ball pivot connects, thereby can automatic aligning, improves stressed and moving situation.Piston 15 can be located at ozzle and connect in the piston cylinder in the part 4 and axially move under the drive of screw rod 11, thus suction liquid correspondingly.Screw rod 11 is threaded at the link of button link with button regulating sleeve 6, so, the operator can adjust the liquid measure of absorption by rotary knob regulating sleeve 6, and can bring in suction liquid by the operation of operation (for example push and unclamp subsequently) button regulating sleeve.What understand easily is, because characteristics that are threaded and screw rod 11 are not rotatable, so when rotary knob regulating sleeve 6, when button regulating sleeve 6 moved on axis x-x, screw rod 11 can not move on axis x-x; And when pressing operation button regulating sleeve 6 for example, button regulating sleeve 6 and screw rod 11 move on axis x-x together, but can not produce relative rotation.This is particularly advantageous, and concrete benefit will describe in detail hereinafter.
Adjusting device 5 also comprises elastic component, here is one-level spring 12, and one end and screw rod 11 join, and the other end and fast pulley 14 join.The effect of elastic component is: one, its pressure suffered between screw rod 11 and fast pulley 14 reacts on and stops screw rod 11 to shift to the screw-plunger link in other words, its two, pushing and subsequently behind the release button regulating sleeve 6, screw rod 11 is urged towards button link direction whereby.As mentioned above, one-level spring 12 joins with pressurized mode and screw rod 11 and fast pulley 14 and is installed in the fixed cover 21.It may occur to persons skilled in the art that with compress mode spring being set is favourable to spring service life.
In adjusting device 5, screw rod 11 to be can't being provided with around the mode of axis x-x rotation, thereby can like this, can not change stroke by rotary knob regulating sleeve 6, to adjust liquid absorption with 6 rotations of button regulating sleeve.At this moment, one-level spring 12 is in the initial state that compresses in advance all the time.And when carrying out the operation of suction liquid, button regulating sleeve 6 is operated and moves along axis x-x, and the screw rod 11 of this moment axially moves with button regulating sleeve 6 relative fixed wheel 14, meanwhile, and screw rod 11 compression one-level springs 12.Behind suction liquid EO, screw rod 11 returns its initial position under the effect of one-level spring 12.This shows that in the process of the liquid absorption of adjusting adjustable pipette, the power of one-level spring 12 is not changed.Be provided with stop part 7 in fixed cover 21, be used for providing an obvious limit or feel clearly when suction liquid, promptly stop part 7 can limit the stroke S that screw rod 11 moves along axis x-x.Here, stroke S equals piston stroke, can determine the suction liquid measure thus.Preferably, stop part 7 is being placed in the fixed cover 21 along the mode that axis x-x moves.In addition, except above-mentioned composition member, adjusting device 5 also comprises the two-level spring 9 that is placed in the shell 2, one end butt stop part 7, and the digital regulating sleeve 10 of its other end butt, the function of digital regulating sleeve and structure will describe in detail hereinafter.Two-level spring 9 for example is arranged between the end face of stop part 7 and digital regulating sleeve.Certainly, the other end of two-level spring 9 also can be received on any other member that links to each other with fixed cover, perhaps directly receives on the fixed cover.Owing to be provided with two-level spring 9, so when discharge opeing, the operator must overcome the power of two-level spring 9, applying bigger breakthrough power could be with the liquid emptying in the suction nozzle.Two-level spring 9 for example is metal stage clip.
In addition, adjusting device 5 also comprises fine-tuning nut 8, and it is threaded with fixed cover 21 and one end butt stop part 7.By turning fine-tuning nut 8, can change or regulate the axial location of stop part 7, change above-mentioned stroke S thus.When weighing with scale liquid absorption, can regulate fine-tuning nut 8, so that the liquid absorption that weighing obtains is with consistent from the shown liquid absorption of digital display device.Described digital display device will illustrate hereinafter.
Fixed cover 21 is preferably pasting the internal face of shell.The length of fixed cover 21, diameter and shape are so selected, and promptly it surrounds digital regulating sleeve 10 and fast pulley 14 and fine-tuning nut 8 basically.Fixed cover is realized the incorporate absolute construction of intraware as the assembling basis of inner body, helps I﹠M, also helps the replacing of shell 2, makes things convenient for the conversion profile.
Below, in conjunction with Fig. 3 associative operation according to adjustable pipette of the present utility model and adjusting device thereof is described simply.Fig. 3 represents to be in the adjustable pipette and the adjusting device thereof of original state, at this moment, if adjust the imbibition capacity, the operator just turns button regulating sleeve 6, button regulating sleeve 6 is moved along axis x-x because of threaded function when rotated, at this moment, the operator can indicate and sets up liquid absorption according to being placed in reader in the shell 2.Subsequently, when carrying out the operation of suction liquid, operator presses button regulating sleeve 6 drives screw rod 11 and piston 15 and moves to the suction nozzle direction along axis x-x together, and this moment, screw rod 11 compression one-level springs 12 were further compressed away from original state.When stop part 7 contacts the following rest point 23 of button regulating sleeve 6, the trend of two-level spring 9 will appear beginning to compress, following rest point when this contact defines imbibition, this moment, operator release button regulating sleeve 6, button regulating sleeve 6 just and screw rod 11 under the pushing effect of one-level spring 12, return its initial position together.For fear of near the double vibrations the terminal point of one-level spring 12 resiliences, thrust ring 22 can be set, be used to limit described initial position, i.e. screw rod 11 maximum height that can reach.At this moment, the piston on the piston end of screw rod 11 15 is finished the imbibition operation.And when discharge opeing, the operator pushes button regulating sleeve 6 once more, drives screw rod 11 and piston 15 and moves down along axis x-x together, and the screw rod 11 compression one-level springs 12 of this moment are further compressed away from original state.During lower surface, the operator can continue the application of force to the following rest point 23 that contacts button regulating sleeve 6 when stop part 7 in other words, overcome two-level spring 9 elastic force make button regulating sleeve 6 continue to move down, evacuation of liquid thus.If calibrate in above-mentioned liquid absorption adjustment process, the operator can turn fine-tuning nut 8 so that it moves axially, and also changes stroke S thus thereby make stop part 7 produce axial displacement, realizes calibration.In Fig. 3, when suction liquid, the integral body that screw rod 11 and button regulating sleeve 6 are constituted can be subjected to the restriction of rest point and following rest point.Last rest point is meant when pipetting the extreme higher position that should integral body can reach, following rest point is meant in pipetting when the lower surface of button regulating sleeve 6 contacts stop part 7 should the residing position of integral body, and the distance between last rest point and the following rest point can be understood that piston stroke S.
Fig. 3 also shows an embodiment of digital display device, is used to show the Sheng liquid measure of pipettor.In this embodiment, digital display device comprises digital regulating sleeve 10, counting ring 13, gear 16 and gear shaft, wherein digital regulating sleeve 10 is installing with the mode that button regulating sleeve 6 rotates synchronously, and counting ring 13 to be can installing around the mode of axis x-x rotation, and is marked with numeral or scale at described counting ring 13 and the digital cover 10 of reconciling.Digital regulating sleeve 10 has the carry moving tooth, and the top of the first adjacent with it counting ring 13 has the tooth of a circle.And the tooth on the moving tooth of first gear 16 and digital regulating sleeve 10 and the top of this first counting ring 13 all meshes.When digital regulating sleeve 10 rotated to the carry position, the moving tooth on it meshed this first gear 16 and stirs this gear 16 rotations.This first gear correspondingly drives first counting ring rotation carry again.Similarly, have moving tooth in the bottom of this first counting ring 13, and the moving tooth of this bottom and second gears engaged.And the second adjacent counting ring top is provided with the tooth when a circle of second gears engaged.When first this counting ring 13 rotated to the carry position, the moving tooth of its bottom was stirred this second gear rotation.The rotation of this second gear and then driven second counting ring rotation carry.Other counting ring all can be similar to design like this and layout, has therefore realized stirring the function of carry.Yet, be understandable that at bottom counting ring only need be provided with the tooth of a circle on top and need not to be provided with moving tooth in its underpart.Thereby when rotary knob regulating sleeve 6 when adjusting the Sheng liquid measure of pipettor, can show in real time from the window of shell and contain liquid measure.Be understandable that described digital display device can only have a counting ring, also can have a plurality of counting rings.And when a counting ring was only arranged, described digital display device can not comprise second gear; And when having a plurality of counting ring, described digital display device comprises at least one second gear, and the gear sum is no less than the counting ring number.Further, on the upper surface of the lower surface of digital regulating sleeve 10 and fast pulley 14, be respectively arranged with intermeshing tooth, thereby improved digital display effect, for example made the shown numeral alignment of window, avoided showing the part between half numeral or two numerals thus.
Below, come simple declaration according to the operation principle of adjusting device of the present utility model and the starting force force-bearing situation of one-level spring thereof in conjunction with Fig. 4 a to Fig. 4 b and Fig. 5 a to Fig. 5 b.
Fig. 4 a contrasts the operation principle that shows different adjusting devices with Fig. 4 b, and wherein Fig. 4 a represents the operation principle of traditional pipettor adjusting device, and Fig. 4 b represents the operation principle according to adjusting device of the present utility model.In Fig. 4, the length of straight line is represented the size of piston stroke, just moves the liquid measure size.Shown in Fig. 4 a, when drawing the liquid of different volumes, following rest point position does not change, and changes piston stroke by adjusting the rest point position.Like this, the starting force of one-level spring changes with the variation of imbibition capacity, and operator's feel also can be different, shown in Fig. 5 a.Even when the inoperation pipettor, it also can be subjected to the stress of different sizes, causes shorten service life thus.In expression Fig. 4 b of the present utility model, when adjusting the imbibition capacity, last rest point position does not become, and the rest point position changes down, and like this, the starting force of one-level spring is changeless, shown in Fig. 5 b, has avoided above-mentioned shortcoming thus.
Fig. 5 a represents the starting force situation of one-level spring when setting up different liquid absorption of traditional pipettor, and Fig. 5 b represents the situation of the one-level spring starting force in the utility model.Find that by contrast in traditional pipettor, shown in Fig. 5 a, when liquid absorption was transferred to maximum, its spring starting force was a minimum of a value, when liquid absorption changed, spring force also changed thereupon.And shown in Fig. 5 b, no matter being adjusted into any value in the specified volume scope, the one-level spring starting force that is used for the adjusting device of adjustable pipette is minimum of a value.Therefore under inactive state at ordinary times, the starting force of one-level spring can both remain the minimum starting force of setting.
Fig. 6 represents to be used for the noiseless mechanism of adjusting device.This noiseless mechanism comprises the carriage 18 that is installed on the fast pulley 14, is installed in push rod 19 and button 20 on the carriage 18.Carriage can be made into integration with fixed cover or fast pulley.Perhaps, noiseless mechanism does not comprise carriage, and be fixed cover or fixed cover of push rod supports, and this also is feasible.One end butt button 20 of push rod 19, other end butt counting ring 13.Perhaps, apical ring that is enclosed within on the counting ring 13 of the other end butt of push rod, this apical ring are used to prevent the counting ring wearing and tearing.Push rod 19 also has can be around the fulcrum of its rotation, and this fulcrum is fixed.As shown in the figure, fulcrum is provided in a side of the cylinder on the recess of fixed cover 21.When button 20 was pressed, push rod 19 rotated around this cylinder because of leverage, thus the counting ring 13 that jack-up and push rod 19 join, and then the digital regulating sleeve 10 of jack-up, make the tooth of digital regulating sleeve 10 lower ends and the tooth of fast pulley 14 break away from engagement.Like this, so that the digital display device required power that overcomes of when rotation is less, can eliminate the sound that meshes between the gear of factor sign indicating number regulating sleeve 10 and fast pulley 14 and send when rotary knob regulating sleeve 6.And after button regulating sleeve 6 has rotated, can unclamp button 20, thereby under the effect of two-level spring 9, digital regulating sleeve 10 is got back to the origin-location, and because the engagement of the tooth between digital regulating sleeve 10 and the fast pulley 14 alignment relation, thereby can not influence digital display effect.
Because adjustable pipette of the present utility model or adjusting device have adopted said structure, so it has advantages such as rapid operation, long service life.Above-mentioned adjusting device also can be used to moving in the liquid instrument of multichannel pipettor or other, and the adjustable pipette that has a this adjusting device can be widely used in fields such as chemistry, medical and health and biology.
Although below with specific embodiments the utility model is described in detail in conjunction with the embodiments, but it will be apparent to one skilled in the art that and to make various improvement and variation to the foregoing description and specific embodiments aspect combining form and the character displacement.For example, two-level spring can be stage clip as mentioned above, but it also can be to produce part such as cushion elastic reactance, that have other shape or structure.Those skilled in the art will appreciate that each above-mentioned technical characterictic can be made up according to the mode that is different from said mode, perhaps itself just can become the protection theme.
Claims (10)
1. the adjusting device of an adjustable pipette (5), it is arranged in the shell with axis (x-x) (2) of this pipettor, it is characterized in that, and this adjusting device (5) comprising:
Fixture (14,21) is can not be arranged in this shell relative to the mode that this shell moves;
Screw rod (11), this screw rod (11) has button link and piston end, and this screw rod is with non-rotatable but can be provided with along the mobile mode of this axis (x-x);
Elastic component (12), this elastic component are configured to an end under compressive state and this screw rod joins and the other end and this fixture (14,21) join, and the suffered pressure of this elastic component (12) reacts on this screw rod (11) and moves to its piston end direction;
Button (6) with link and operating side, this button is threaded at the button link of this link with this screw rod (11);
Be arranged near the stop part (7) this button link, this stop part limit this screw rod (11) relatively this fixture (14,21) along the mobile stroke of this axis (x-x).
2. adjusting device according to claim 1 (5), it is characterized in that, this stop part (7) is being provided with along the mobile mode of this axis (x-x), this adjusting device also comprises two-level spring (9), one of this two-level spring terminates to this stop part (7), the other end is received this fixture (14,21).
3. adjusting device according to claim 1 and 2 (5) is characterized in that, also comprises fine-tuning nut (8), and this fine-tuning nut and this fixture (14,21) are threaded, and an end of this fine-tuning nut (8) is against this stop part (7).
4. adjusting device according to claim 1 and 2 (5) is characterized in that, also comprises the thrust ring (22) that is enclosed within on this screw rod (11), and this thrust ring limits the maximum height that this screw rod can reach with cooperating of this screw rod (11).
5. adjusting device according to claim 1 and 2 (5), it is characterized in that, also has digital display device, this digital display device comprises digital regulating sleeve (10), at least one counting ring (13) and first gear (16), wherein should install in the mode of rotating synchronously by number regulating sleeve (10) with this button (6), this counting ring (13) is installing around the mode of this axis (x-x) rotation, this number regulating sleeve (10) has moving tooth, and the top of this counting ring (13) has the tooth around its periphery, and the tooth on the moving tooth of this number regulating sleeve and the top of adjacent counting ring is with this first gear (16) engagement.
6. adjusting device according to claim 5 (5), it is characterized in that, this digital display device also comprises at least one second gear, described at least one counting ring comprises a plurality of counting rings (13), in two adjacent counting rings, have moving tooth near the counting ring of this number regulating sleeve in the bottom, the moving tooth of this counting ring and the tooth on the periphery of the top of another counting ring all with same second gears engaged.
7. adjusting device according to claim 5 (5) is characterized in that, this number is reconciled cover (10) and have tooth on the lower surface, this fixture (14) with face that this lower surface engages on have the tooth that is meshed with this tooth.
8. adjusting device according to claim 7 (5), it is characterized in that, also has noiseless mechanism, this noiseless mechanism comprises button (20) and push rod (19), this button of end butt (20) of this push rod, this digital display device of other end butt, and this push rod (19) has motionless fulcrum, and this push rod (19) can be around this fulcrum rotation.
9. adjustable pipette, the ozzle that have shell (2), links to each other with this shell connects part (4), is installed in adjusting device and the piston (15) that links to each other with this adjusting device in this shell, it is characterized in that this adjusting device is according to each described adjusting device (5) in the claim 1 to 8.
10. adjustable pipette according to claim 9 is characterized in that, comprises that also being installed in this ozzle connects damper rod in the part, is provided with the labyrinth type air flue in the periphery of this damper rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201669915U CN201558707U (en) | 2009-07-21 | 2009-07-21 | Adjustable liquid transfer device and adjusting device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201669915U CN201558707U (en) | 2009-07-21 | 2009-07-21 | Adjustable liquid transfer device and adjusting device thereof |
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| CN201558707U true CN201558707U (en) | 2010-08-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106132547A (en) * | 2014-04-10 | 2016-11-16 | 吉尔松有限合伙公司 | Comprise two each other in the multichannel liquor-transferring system of imbricated suction room |
| CN106794463A (en) * | 2014-10-03 | 2017-05-31 | 吉尔松有限合伙公司 | Sampling pipettor with ergonomics control button |
| CN108786947A (en) * | 2017-05-05 | 2018-11-13 | 埃佩多夫股份公司 | Electronics dosage driving device |
| CN111386153A (en) * | 2018-04-17 | 2020-07-07 | 吉尔松有限合伙公司 | Jaw clutch system for maintaining the position of a volume adjustment screw of a sampling pipette |
| CN113083391A (en) * | 2021-04-07 | 2021-07-09 | 宁儿医院股份有限公司 | Novel liquid-transfering gun head loads device |
-
2009
- 2009-07-21 CN CN2009201669915U patent/CN201558707U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106132547A (en) * | 2014-04-10 | 2016-11-16 | 吉尔松有限合伙公司 | Comprise two each other in the multichannel liquor-transferring system of imbricated suction room |
| CN106132547B (en) * | 2014-04-10 | 2020-02-07 | 吉尔松有限合伙公司 | Multichannel pipetting system comprising two suction chambers imbricated one above the other |
| CN106794463A (en) * | 2014-10-03 | 2017-05-31 | 吉尔松有限合伙公司 | Sampling pipettor with ergonomics control button |
| CN106794463B (en) * | 2014-10-03 | 2019-05-07 | 吉尔松有限合伙公司 | Sampling pipettor with ergonomics control button |
| CN108786947A (en) * | 2017-05-05 | 2018-11-13 | 埃佩多夫股份公司 | Electronics dosage driving device |
| CN108786947B (en) * | 2017-05-05 | 2021-10-29 | 埃佩多夫股份公司 | Electronic dosing drive |
| CN111386153A (en) * | 2018-04-17 | 2020-07-07 | 吉尔松有限合伙公司 | Jaw clutch system for maintaining the position of a volume adjustment screw of a sampling pipette |
| US11364491B2 (en) | 2018-04-17 | 2022-06-21 | Gilson Sas | Dog clutch system for holding the position of a volume adjustment screw for a sampling pipette |
| CN113083391A (en) * | 2021-04-07 | 2021-07-09 | 宁儿医院股份有限公司 | Novel liquid-transfering gun head loads device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170526 Address after: Beijing Yu'an Shunyi District airport economic core area road No. 31 Patentee after: Dragon Laboratory Instruments Limited Address before: Room 11, building 1102, Ginza square, 565-567 Nathan Road, Kowloon, Hongkong, China Patentee before: Dalong Medical Devices Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20100825 |
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| CX01 | Expiry of patent term |