CN1248734A - Dial plate type adjustable pipette - Google Patents
Dial plate type adjustable pipette Download PDFInfo
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- CN1248734A CN1248734A CN 98119756 CN98119756A CN1248734A CN 1248734 A CN1248734 A CN 1248734A CN 98119756 CN98119756 CN 98119756 CN 98119756 A CN98119756 A CN 98119756A CN 1248734 A CN1248734 A CN 1248734A
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Abstract
The driving plate type adjustable pipettor includes shell body, piston barrel, pipettor head, lower retainer, first spring and adjustable liquid-transferring mechanism mounted in the shell body. Said adjustable liquid-transferring mechanism includes: guide; micro quantity regulating device formed from upper screw arbor, lower screw arbor, first nut and first driving plate; first spacer; medium dosage regulating device formed from second screw arbor, second nut and second driving plate; second spacer; large dosage regulating device formed from spacing screw arbor, stepping nut and third driving plate; piston component; second spring; and third spring.
Description
The present invention relates to a kind of pipettor, particularly a kind of dial plate type adjustable pipette.
Pipettor is a kind of precision instrument that is used for transfer liquid, is widely used for fields such as chemistry, medical and health and biology.It is mainly by piston moving axially in plunger shaft, and the volume that changes plunger shaft is drawn or discharged liquid.Increase when moving axially of piston makes the plunger shaft space, the pressure in the plunger shaft reduces, and liquid enters the pipettor head that is attached thereto by the atmospheric pressure effect in the external world; Reduce when moving axially of piston makes the plunger shaft space, the pressure in the plunger shaft increases, and liquid is discharged from the pipettor head, finishes the transfer of liquid thus.Because the volume-variation of plunger shaft is controlled by piston and moves axially distance in plunger shaft, therefore comes control piston displacement by a pair of stop, just can reach the purpose of controlling liquid transfer amount.Distance between a pair of stop increases, piston move axially the corresponding increase of distance, the transfer amount of liquid also increases; Otherwise the transfer amount of liquid then reduces.Adjustable pipette can be divided into two kinds: discontinuous adjustable pipette and continuous adjustable pipette.Though discontinuous adjustable pipette by step-by-step system can quick adjustment liquid transfer amount because continuous liquid transfer amount can not be provided, so now by adjustable pipette replacement continuously.At present the continuous adjustable pipette that uses mostly is to regulate distance between a pair of stop by rotating a pair of screw rod and nut, reaches the transfer amount of controlling liquid.Move the liquid precision for what keep pipettor, general design smaller of pitch, like this, though the transfer amount that continuous adjustable pipette can be regulated liquid continuously, but when carrying out the transfer that twice liquid capacity differ greatly, must a large amount of rotary screws and nuts relatively.Especially carry out repeatedly liquid capacity when changing big transfer at needs, the adjustable pipette of this structure can bring very big inconvenience to the operator.
The purpose of this invention is to provide a kind of dial plate type adjustable pipette, it both can resemble the transfer amount of regulating liquid the discontinuous adjustable pipette speed and conveniencely, can resemble the transfer amount of regulating liquid continuously the continuous adjustable pipette again.
The objective of the invention is to be achieved through the following technical solutions, a kind of dial plate type adjustable pipette, comprise: a housing, comprise the upper shell and the lower house that removably are fixed together, its xsect is oval, one opening is respectively arranged on the two side of its short-axis direction, on a sidewall of its long axis direction, a display window is arranged, its round cavity comprises bigger top inner chamber and the less lower lumen of diameter of diameter that interconnects, and also have an annular groove that is communicated with display window on the internal chamber wall of top, and its upper surface and lower surface are equipped with the hole that is communicated with inner chamber;
One piston cylinder, comprise the cylindrical shell and the cover that removably are fixed together, the upper end of piston cylinder removably is connected with the lower end of described housing, and its inner chamber is communicated with the inner chamber of housing, and its inner chamber lower end is in communication with the outside by a capillary channel, in the cylinder top inboard one annular groove is arranged;
One pipettor head, its upper end removably is connected the lower end of described piston cylinder, and its inner chamber is communicated with the inner chamber of piston cylinder by described capillary channel, and there is an aperture that is in communication with the outside its lower end;
One lower retainer comprises a cylindrical portions may and at this outward extending flange in cylindrical portions may lower end, and described flange is positioned in the annular groove of piston cylinder and can moves axially therein, and cylindrical portions may is positioned at the lower part of frame inner chamber;
One first spring is positioned at the annular groove of piston cylinder, and the lower surface of the flange on its upper end and the lower retainer contacts, and its lower end contacts with the diapire of annular groove; And
Be installed in the adjustable pipetting device in the housing;
Wherein, described adjustable pipetting device comprises:
One guide rail, its lateral surface is hexahedron, and there is an axially extending bore centre, and fixedly connected with the upper end open of housing in its upper end, and its lower end extends into the top inner chamber of housing;
Screw rod on one, it has the circular central through hole that can pass through for described guide rail, the screw thread on lateral surface and from the outward extending flange in aperture, upper end, and the lateral surface of described flange can be slidingly matched with the medial surface of the top inner chamber of housing; Described upward screw rod removably is fixed on the top of the top inner chamber of housing, and described guide rail is by its central through hole;
Screw rod once, it has the sexangle central through hole that can be slidingly matched with described guide rail lateral surface, screw thread on lateral surface and from the outward extending flange in aperture, lower end, the external thread on the following screw rod has the identical hand of spiral and different pitch with the external thread of last screw rod; Described down screw rod is installed on the guide rail, and be positioned at screw rod below;
One first nut, the lug of relative both sides on it has internal thread and lays respectively at lateral surface, wherein, described internal thread comprise can with the upper internal threaded of the external thread of last screw rod engagement and can with the lower internal thread of following screw engages; Described first nut is installed into while and last screw rod and following screw engages;
One first dial, it is cylindric, have on the madial wall respectively with the described first nut lateral surface on the two axial grooves that are slidingly matched of two lugs, lateral surface is marked with scale; The mode that described first dial is slidingly matched with described axial notch and described lug is installed in first nut outside, and is positioned at the top of the annular groove of housing top inner chamber; Described screw rod, following screw rod, first nut and first dial gone up is combined into a micro-regulating device;
One first spacer is annular, and its internal diameter is identical with first dial with external diameter; It is installed in the annular groove of housing top inner chamber, and the lower end of close first dial;
One second screw rod, it has the sexangle central through hole that can be slidingly matched with described guide rail lateral surface, the screw thread on lateral surface and from the outward extending flange in aperture, lower end, second screw rod is installed on the guide rail, and be positioned at screw rod down below;
One second nut, the lug of relative both sides on it has internal thread and lays respectively at lateral surface; Described second nut is installed into and second screw engages, and its upper surface is near the lower surface of screw rod flange under described;
One second dial, it is cylindric, have on the madial wall respectively with the described second nut lateral surface on the two axial grooves that are slidingly matched of two lugs, lateral surface is marked with scale; The mode that described second dial is slidingly matched with described axial notch and described lug is installed in second nut outside, and is positioned at the middle part of the annular groove of housing top inner chamber, and its upper end is near the lower surface of described first spacer; Described second screw rod, second nut and second dial are combined into dosage adjusting device in;
One second spacer is annular, and its internal diameter is identical with second dial with external diameter; It is installed in the annular groove of housing top inner chamber, and the lower end of close second dial;
One spacing screw rod, be oval tubular, have the sexangle center pit that can be slidingly matched with described guide rail lateral surface, the lug of both sides and the shoulder that extends internally from the aperture, lower end relatively on the lateral surface of upper end, the diameter in the hole that described shoulder forms equals the diameter of guide rail axially extending bore; Described spacing screw rod is installed in the bottom of guide rail, and be positioned at second screw rod below;
One stepping nut, it has the spiral groove on medial surface, lay respectively at the lug of relative both sides on the lateral surface of upper end and the shoulder that the aperture, upper end extends internally, and the axial distance of adjacent trenches is greater than the pitch of second nut inner thread; Lug engagement on the spiral groove of described stepping nut and the described spacing screw rod, and its upper surface is near the lower surface of the described second screw rod flange;
One the 3rd dial, it is cylindric, have on the madial wall respectively with described stepping nut lateral surface on the two axial grooves that are slidingly matched of two lugs, lateral surface is marked with scale; The mode that described the 3rd dial is slidingly matched with described axial notch and described lug is installed in the stepping nut outside, and is positioned at the bottom of the annular groove of housing top inner chamber, and its upper end is near the lower surface of described second spacer; Described spacing screw rod, stepping nut and the 3rd dial are combined into a heavy dose of regulating device;
One piston component, comprise through the axially extending bore of guide rail and the piston rod of lower retainer cylindrical portions may, outward extending at this piston rod middle part, external diameter matches with the lower housing portion inner chamber, the defining flange between the upper surface of the lower surface of spacing screw rod and lower retainer, and this piston-rod lower end, can be in the piston cylinder inner chamber axially movable piston;
One second spring is positioned in the lower part of frame inner chamber, and its upper end contacts with the lower surface of defining flange on the piston component, and its lower end contacts with the upper surface of piston cylinder; And
One the 3rd spring is positioned in the top inner chamber of housing, and its upper end contacts with the lower surface of stepping nut, and its lower end contacts with the diapire of the top inner chamber of housing.
Advantage of the present invention is, because dial plate type adjustable pipette provided by the invention has micro-regulating device, middle dosage adjusting device and heavy dose of regulating device simultaneously, therefore it both can resemble the transfer amount of regulating liquid the discontinuous adjustable pipette speed and conveniencely, can resemble the transfer amount of regulating liquid continuously the continuous adjustable pipette again.
Describe a preferred embodiment of the present invention in detail below in conjunction with accompanying drawing, so that more clearly understand the features and advantages of the present invention.
Fig. 1 is the longitudinal section of one embodiment of the invention;
Fig. 2 is the cut-open view along the A-A line among Fig. 1;
Fig. 3 is the cut-open view of the partial interior structure in the structure shown in Figure 1;
Fig. 4 is the structural representation of guide rail;
Fig. 5 is the vertical view of structure shown in Figure 4;
Fig. 6 is a structural representation of going up screw rod;
Fig. 7 is the vertical view of structure shown in Figure 6;
Fig. 8 is the structural representation of following screw rod;
Fig. 9 is the vertical view of structure shown in Figure 8;
Figure 10 is the longitudinal section of first nut;
Figure 11 is the vertical view of structure shown in Figure 10;
Figure 12 is the structural representation of second screw rod;
Figure 13 is the vertical view of structure shown in Figure 12;
Figure 14 is the longitudinal section of second nut;
Figure 15 is the vertical view of structure shown in Figure 14;
Figure 16 is the structural representation of spacing screw rod;
Figure 17 is the vertical view of structure shown in Figure 16;
Figure 18 is the structural representation of stepping nut;
Figure 19 is the vertical view of structure shown in Figure 180;
Figure 20 is the structural representation of dial;
Figure 21 is the vertical view of structure shown in Figure 20.
Referring to Fig. 1 to 3, dial plate type adjustable pipette of the present invention is made up of following parts: a housing 3, comprise the upper shell 48 and the lower house 47 that removably are fixed together by screw (not shown) or alternate manner, so that other parts are installed in the housing inner chamber, the xsect of housing is oval, one opening 25 is respectively arranged on the two side of its short-axis direction, one display window 13 is arranged on a sidewall of its long axis direction, its round cavity comprises bigger top inner chamber and the less lower lumen of diameter of diameter that interconnects, and also have an annular groove 36 that is communicated with display window 13 on the internal chamber wall of top, and its upper surface and lower surface are equipped with the hole that is communicated with inner chamber.
One piston cylinder 11, comprise the cylindrical shell 49 and the cover 50 that removably are fixed together by screw (not shown) or alternate manner, the upper end of piston cylinder removably is connected with the lower end of housing 3 by attaching nut 46, its inner chamber is communicated with the inner chamber of housing 3 by the center pit on the cover 50, and its inner chamber lower end is in communication with the outside by a capillary channel 26, and an annular groove 27 is arranged in the cylinder top inboard.
One pipettor head 12, its upper end removably is connected the lower end of described piston cylinder 11, and its inner chamber is communicated with the inner chamber of piston cylinder 11 by described capillary channel 20, and there is an aperture that is in communication with the outside 28 its lower end.
One lower retainer 9 comprises a cylindrical portions may and at the outward extending flange 29 in this cylindrical portions may lower end, described flange 29 is positioned at 27 li of the annular grooves of piston cylinder and can moves axially therein, and cylindrical portions may is positioned at the lower lumen of housing 3.
One first spring 21 is positioned at the annular groove 27 of piston cylinder 11, and the lower surface of the flange 29 on its upper end and the lower retainer 9 contacts, and its lower end contacts with the diapire of annular groove 27.
And the adjustable pipetting device that is installed in 3 li of housings, and this adjustable pipetting device comprises:
One guide rail 19, shown in Figure 4 and 5, its lateral surface is hexahedron, and there is an axially extending bore centre, and fixedly connected with the upper end open of housing 3 in its upper end, and its lower end extends into the top inner chamber of housing 3.
Screw rod 14 on one, shown in Fig. 6 and 7, it has the circular central through hole 30 that can pass through for described guide rail 19, the screw thread on lateral surface and from the aperture, upper end outward extending flange 31, and the lateral surface of described flange 31 can be slidingly matched with the medial surface of the top inner chamber of housing 3.The described screw rod 14 of going up is located the top that the pin (not shown) removably is fixed on the top inner chamber of housing 3 by one, and described guide rail 19 is by its central through hole 31.When unloading tommy, and when going up screw rod 14 by the annular opening (not shown) rotation at housing 3 tops, the position of the upper limit device that will describe below can changing, thus carry out pipettor zero correction.
Once screw rod 16, shown in Fig. 8 and 9, it has the sexangle central through hole 32 that can be slidingly matched with described guide rail 19 lateral surfaces, screw thread on lateral surface and from the aperture, lower end outward extending flange 33, the external thread on the following screw rod 16 has the identical hand of spiral and different pitch with the external thread of last screw rod 14.Described down screw rod 16 is installed on the guide rail 19, and be positioned at screw rod 14 below.
One first nut 15, shown in Figure 10 and 11, the lug 34 of relative both sides on it has internal thread and lays respectively at lateral surface.Wherein, described internal thread comprise can with the upper internal threaded of the external thread of last screw rod 14 engagement and the lower internal thread that can mesh with following screw rod 16.Described first nut 15 is installed into while and last screw rod 14 and 16 engagements of following screw rod.Like this, the variable in distance between screw rod be last screw rod 14 and following screw rod 16 and first nut 15 move axially poor, thereby reach the accurately extremely small variable in distance of adjusting.
One first dial 24, shown in Figure 20 and 21, it is cylindric, has the two axial grooves 35 that can be slidingly matched with two lugs 34 on described first nut, 15 lateral surfaces respectively on the madial wall, and lateral surface is marked with scale.Described first dial 24 is installed in first nut, 15 outsides with described axial notch 35 and the mode that described lug 34 is slidingly matched, and is positioned at the top of the annular groove 36 of housing 3 top inner chambers.
Described screw rod 14, following screw rod 16, first nut 15 and first dial 24 gone up is combined into a micro-regulating device.
One first spacer 22 as shown in Figure 3, is annular, and its internal diameter is identical with first dial 24 with external diameter.It is installed in 36 li of the annular grooves of housing 3 top inner chambers, and near the lower end of first dial 24.
One second screw rod 18, shown in Figure 12 and 13, it has sexangle central through hole 37, the screw thread on lateral surface and the outward extending flange 38 from the aperture, lower end that can be slidingly matched with described guide rail 19 lateral surfaces.Second screw rod 18 is installed on the guide rail 19, and be positioned at following screw rod 16 below.
One second nut 17, shown in Figure 14 and 15, the lug 39 of relative both sides on it has internal thread and lays respectively at lateral surface.Described second nut 17 is installed into and 18 engagements of second screw rod, and its upper surface is near the described lower surface of screw rod 16 flanges 33 down.
One second dial 23, it is identical with the structure of first dial 24, shown in Figure 20 and 21.Described second dial 23 is installed in second nut, 17 outsides with described axial notch 35 and the mode that described lug 39 is slidingly matched, and is positioned at the middle part of the annular groove 36 of housing 3 top inner chambers, and its upper end is near the lower surface of described first spacer 22.
One second spacer 40, it is identical with the structure of first spacer 22.It is installed in 36 li of the annular grooves of housing 3 top inner chambers, and near the lower end of second dial 23.It is to prevent to make when stirring a dial adjacent dial to produce malfunction that first spacer 22 and second spacer 40 are installed, thereby prevents the influence to the setting of liquid transfer amount.
One spacing screw rod 6, shown in Figure 16 and 17, also can be called the upper limit device, it is oval tubular, it has the sexangle center pit 41 that can be slidingly matched with guide rail 19 lateral surfaces, the lug 42 of relative both sides and the shoulder 43 that extends internally from the aperture, lower end on the lateral surface of upper end, the diameter in the hole that described shoulder 43 forms equals the diameter of guide rail 19 axially extending bores.This spacing screw rod 6 is installed in the bottom of guide rail 19, and be positioned at second screw rod 18 below.Between the upper surface of the lower surface of spacing screw rod 6 and lower retainer 9 apart from (see figure 1) be a piston component described below displacement, when spacing screw rod 6 because of adjusting when mobile, distance between the upper surface of its lower surface and lower retainer 9 changes, thereby the displacement of piston component also changes.
One stepping nut 5, shown in Figure 18 and 19, it has the spiral groove on medial surface, lay respectively at the lug 44 of relative both sides on the lateral surface of upper end and the shoulder 45 that the aperture, upper end extends internally, and the axial distance of adjacent trenches is greater than the pitch of second nut, 17 internal threads.Lug 42 engagements on the spiral groove of described stepping nut 5 and the described spacing screw rod 6, and its upper surface is near the lower surface of described second screw rod, 18 flanges 38.
One the 3rd dial 4, it is identical with the structure of first dial 24, shown in Figure 20 and 21.The 3rd dial 4 is installed in the outside of stepping nut 5 in the mode that the lug 44 on axial notch 35 and the stepping nut 5 is slidingly matched, and is positioned at the bottom of the annular groove 36 of housing 3 top inner chambers, and its upper end is near the lower surface of second spacer 40.The axial height sum of first dial 24, first spacer 22, second dial 23, second spacer 40 and the 3rd dial 4 adjacent to each other is generally equal to the axial height of annular groove 36.
Spacing screw rod 6, stepping nut 5 and the 3rd dial 4 are combined into a heavy dose of regulating device.
One piston component 1, as shown in Figure 1, comprise through the axially extending bore of guide rail 19 and the piston rod 2 of lower retainer 9 cylindrical portions may, outward extending at these piston rod 2 middle parts, external diameter matches with housing 3 lower lumen, the defining flange 7 between the upper surface of the lower surface of spacing screw rod 6 and lower retainer 9, and these piston rod 2 lower ends, can be in piston cylinder 11 inner chambers axially movable piston 10.
One second spring 8, as shown in Figure 1, it is positioned in the lower lumen of housing 3, and its upper end contacts with the lower surface of defining flange 7 on the piston component 1, and its lower end contacts with the upper surface of piston cylinder 11, thereby upwards promotes piston component 1 all the time.
And one the 3rd spring 20, as shown in Figure 1, it is positioned in the top inner chamber of housing 3, and its upper end contacts with the lower surface of stepping nut 5, and its lower end contacts with the diapire of the top inner chamber of housing 3, thereby upwards promotes stepping nut 5 all the time.Like this, can guarantee that all screw rods in the adjustable pipetting device closely contact with nut, guarantee constant liquid transfer amount, the axial distance that dosage adjusting device and micro-regulating device are produced in can absorbing simultaneously changes.
In said structure, also can make each dial and/or corresponding nut contain locking or step lock structure, in use cause error to prevent pipettor because of the unintentional rotation of dial.
In said structure, each dial and corresponding nut also can not adopt axial notch and lug engaging structure, and any geometrical form of working in coordination of employing except that circle, as long as can move axially and motion without spin between each dial and the corresponding nut.
In said structure, the lateral surface of guide rail can not be a hexahedron also, but other polyhedron or cylinder except that circle, the center pit of the following screw rod that cooperates with guide rail, second screw rod and spacing screw rod then is corresponding fit structure.
During using method of the present invention, regulate the liquid transfer amount as wanting trace, as long as by opening 25 rotating driver plates 24 on housing 3 sidewalls, thereby driving first nut 15 rotates, first nut 15 along on screw rod 14 do the axially movable while, following screw rod 16 also moves axially along guide rail 19, and the variable in distance of screw rod is they and the axially movable range difference of nut up and down, thereby can accurately reach atomic little variable in distance.Following screw rod 16 passes to spacing screw rod 6 with the variable in distance of this denier by second nut 17, carries out the trace of liquid transfer amount thus and regulates.And the liquid transfer amount of trace is read from dial 24 by display window 13.Regulate the liquid transfer amount as dosage in wanting, also be by 25 rotating driver plates 23 of the opening on housing 3 sidewalls, thereby driving second nut 17 rotates, second screw rod 18 is moved axially along guide rail, and by with the contacting of stepping nut 5, this is moved axially pass to spacing screw rod 6, thereby change the position of spacing screw rod 6.Usually, middle dosage adjusting device is used for the transfer amount that tenfold changes liquid, and the liquid transfer amount of middle dosage is also read from dial 23 by display window 13.As wanting heavy dose of liquid transfer amount of regulating, be still by 25 rotating driver plates 4 of the opening on housing 3 sidewalls, rotate thereby drive stepping nut 5, spacing screw rod 6 is moved axially as step-by-step movement along guide rail.Because the axial distance between the adjacent spiral groove on the stepping nut 5 is bigger, thus the moving axially of spacing screw rod 6 apart from bigger, thus change the position of spacing screw rod 6 significantly.Usually, heavy dose of regulating device is used to into hundred times of transfer amount that change liquid, and heavy dose of liquid transfer amount also is to read from dial 4 by display window 13.After the adjusting of finishing the liquid transfer amount, the operator makes the defining flange 7 on the piston component contact with the upper surface of lower retainer 9 with subordinate push piston assembly 1.Then, pipettor head 12 is put into liquid, release plunger assembly 1, the second spring 8 will push away on the piston component 1, and the defining flange 7 on piston component contacts with the lower surface of spacing screw rod 6.At this moment, the inner chamber of piston cylinder 11 forms negative pressure under the effect that moves on the piston 10, makes liquid enter pipettor head 12 by aperture 28 under the atmospheric pressure effect in the external world.Liquid in the pipettor head can reach the purpose of quantitative transfer liquid by pushing piston assembly discharge once more.
Claims (1)
1. dial plate type adjustable pipette comprises:
One housing (3), comprise the upper shell (48) and the lower house (47) that removably are fixed together, its xsect is oval, one opening (25) is respectively arranged on the two side of its short-axis direction, one display window (13) is arranged on a sidewall of its long axis direction, its round cavity comprises bigger top inner chamber and the less lower lumen of diameter of diameter that interconnects, and also have an annular groove (36) that is communicated with display window (13) on the internal chamber wall of top, and its upper surface and lower surface are equipped with the hole that is communicated with inner chamber;
One piston cylinder (11), comprise the cylindrical shell (49) and the cover (50) that removably are fixed together, the upper end of piston cylinder removably is connected with the lower end of described housing (3), its inner chamber is communicated with the inner chamber of housing (3), and its inner chamber lower end is in communication with the outside by a capillary channel (26), in cylindrical shell (49) inboard, top one annular groove (27) is arranged;
One pipettor head (12), its upper end removably is connected the lower end of described piston cylinder (11), and its inner chamber is communicated with the inner chamber of piston cylinder (11) by described capillary channel (20), and there is an aperture that is in communication with the outside (28) its lower end;
One lower retainer (9), comprise a cylindrical portions may and at the outward extending flange in this cylindrical portions may lower end (29), described flange (29) is positioned at annular groove (27) lining of piston cylinder and can moves axially therein, and cylindrical portions may is positioned at the lower lumen of housing (3);
One first spring (21) is positioned at the annular groove (27) of piston cylinder (11), and the lower surface of the flange (29) on its upper end and the lower retainer (9) contacts, and its lower end contacts with the diapire of annular groove (27); And
Be installed in the adjustable pipetting device of housing (3) lining;
It is characterized in that described adjustable pipetting device comprises:
One guide rail (19), its lateral surface is hexahedron, and there is an axially extending bore centre, and fixedly connected with the upper end open of housing (3) in its upper end, and its lower end extends into the top inner chamber of housing (3);
Screw rod on one (14), it has the circular central through hole (30) that can supply described guide rail (19) to pass through, screw thread on lateral surface and from the outward extending flange in aperture, upper end (31), and the lateral surface of described flange (31) can be slidingly matched with the medial surface of the top inner chamber of housing (3); Described upward screw rod (14) removably is fixed on the top of the top inner chamber of housing (3), and described guide rail (19) is by its central through hole (31);
Screw rod (16) once, it has the sexangle central through hole (32) that can be slidingly matched with described guide rail (19) lateral surface, screw thread on lateral surface and from the outward extending flange in aperture, lower end (33), the external thread on the following screw rod (16) has the identical hand of spiral and different pitch with the external thread of last screw rod (14); Described down screw rod (16) is installed on the guide rail (19), and be positioned at screw rod (14) below;
One first nut (15), the lug (34) of relative both sides on it has internal thread and lays respectively at lateral surface, wherein, described internal thread comprise can with the upper internal threaded of the external thread of last screw rod (14) engagement and the lower internal thread that can mesh with following screw rod (16); Described first nut (15) is installed into while and last screw rod (14) and following screw rod (16) engagement;
One first dial (24), it is cylindric, have on the madial wall respectively with described first nut (15) lateral surface on the two axial grooves (35) that are slidingly matched of two lugs (34), lateral surface is marked with scale; The mode that described first dial (24) is slidingly matched with described axial notch (35) and described lug (34) is installed in first nut (15) outside, and is positioned at the top of the annular groove (36) of housing (3) top inner chamber; Described screw rod (14), following screw rod (16), first nut (15) and first dial (24) gone up is combined into a micro-regulating device;
One first spacer (22) is annular, and its internal diameter is identical with first dial (24) with external diameter; It is installed in annular groove (36) lining of housing (3) top inner chamber, and the lower end of close first dial (24);
One second screw rod (18), it has the sexangle central through hole (37) that can be slidingly matched with described guide rail (19) lateral surface, screw thread on lateral surface and from the outward extending flange in aperture, lower end (38), second screw rod (18) is installed on the guide rail (19), and be positioned at screw rod (16) down below;
One second nut (17), the lug (39) of relative both sides on it has internal thread and lays respectively at lateral surface; Described second nut (17) is installed into and second screw rod (18) engagement, and its upper surface is near the described lower surface of screw rod (16) flange (33) down;
One second dial (23), it is cylindric, have on the madial wall respectively with described second nut (17) lateral surface on the two axial grooves (35) that are slidingly matched of two lugs (39), lateral surface is marked with scale; The mode that described second dial (23) is slidingly matched with described axial notch (35) and described lug (39) is installed in second nut (17) outside, and being positioned at the middle part of the annular groove (36) of housing (3) top inner chamber, its upper end is near the lower surface of described first spacer (22); Described second screw rod (18), second nut (17) and second dial (23) are combined into dosage adjusting device in;
One second spacer (40) is annular, and its internal diameter is identical with second dial (23) with external diameter; It is installed in annular groove (36) lining of housing (3) top inner chamber, and the lower end of close second dial (23);
One spacing screw rod (6), be oval tubular, has the sexangle center pit (41) that can be slidingly matched with described guide rail (19) lateral surface, the lug (42) of relative both sides and the shoulder (43) that extends internally from the aperture, lower end on the lateral surface of upper end, the diameter in the hole that described shoulder (43) forms equals the diameter of guide rail (19) axially extending bore; Described spacing screw rod (6) is installed in the bottom of guide rail (19), and be positioned at second screw rod (18) below;
One stepping nut (5), it has the spiral groove on medial surface, lay respectively at the lug (44) of relative both sides on the lateral surface of upper end and the shoulder (45) that the aperture, upper end extends internally, and the axial distance of adjacent trenches is greater than the pitch of second nut (17) internal thread; Lug (42) engagement on the spiral groove of described stepping nut (5) and the described spacing screw rod (6), and its upper surface is near the lower surface of described second screw rod (18) flange (38);
One the 3rd dial (4), it is cylindric, have on the madial wall respectively with described stepping nut (5) lateral surface on the two axial grooves (35) that are slidingly matched of two lugs (44), lateral surface is marked with scale; The mode that described the 3rd dial (4) is slidingly matched with described axial notch (35) and described lug (44) is installed in stepping nut (5) outside, and being positioned at the bottom of the annular groove (36) of housing (3) top inner chamber, its upper end is near the lower surface of described second spacer (40); Described spacing screw rod (6), stepping nut (5) and the 3rd dial (4) are combined into a heavy dose of regulating device;
One piston component (1), comprise through the axially extending bore of guide rail (19) and the piston rod (2) of lower retainer (9) cylindrical portions may, outward extending at this piston rod (2) middle part, external diameter matches with housing (3) lower lumen, the defining flange (7) between the upper surface of the lower surface of spacing screw rod (6) and lower retainer (9), and this piston rod (2) lower end, can be in piston cylinder (11) inner chamber axially movable piston (10);
One second spring (8) is positioned in the lower lumen of housing (3), and its upper end contacts with the lower surface of defining flange (7) on the piston component (1), and its lower end contacts with the upper surface of piston cylinder (11); And
One the 3rd spring (20) is positioned in the top inner chamber of housing (3), and its upper end contacts with the lower surface of stepping nut (5), and its lower end contacts with the diapire of the top inner chamber of housing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98119756 CN1248734A (en) | 1998-09-22 | 1998-09-22 | Dial plate type adjustable pipette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98119756 CN1248734A (en) | 1998-09-22 | 1998-09-22 | Dial plate type adjustable pipette |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1248734A true CN1248734A (en) | 2000-03-29 |
Family
ID=5226454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98119756 Pending CN1248734A (en) | 1998-09-22 | 1998-09-22 | Dial plate type adjustable pipette |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1248734A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105618169A (en) * | 2015-12-21 | 2016-06-01 | 安徽农业大学 | Equivalent continuous dropping liquid-transferring gun |
| CN106470760A (en) * | 2014-07-04 | 2017-03-01 | 埃佩多夫股份公司 | Pipettor for operating syringe |
| CN106525503A (en) * | 2016-12-01 | 2017-03-22 | 无锡艾科瑞思产品设计与研究有限公司 | Micropipettor for food detection |
-
1998
- 1998-09-22 CN CN 98119756 patent/CN1248734A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106470760A (en) * | 2014-07-04 | 2017-03-01 | 埃佩多夫股份公司 | Pipettor for operating syringe |
| CN106470760B (en) * | 2014-07-04 | 2019-06-07 | 埃佩多夫股份公司 | Pipettor for operating syringe |
| US10507463B2 (en) | 2014-07-04 | 2019-12-17 | Eppendorf Ag | Pipette for activating a syringe |
| CN105618169A (en) * | 2015-12-21 | 2016-06-01 | 安徽农业大学 | Equivalent continuous dropping liquid-transferring gun |
| CN105618169B (en) * | 2015-12-21 | 2017-06-16 | 安徽农业大学 | A kind of continuous drop liquid-transfering gun of equivalent |
| CN106525503A (en) * | 2016-12-01 | 2017-03-22 | 无锡艾科瑞思产品设计与研究有限公司 | Micropipettor for food detection |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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