CN213775861U

CN213775861U - Multi-channel air pump

Info

Publication number: CN213775861U
Application number: CN202022478447.3U
Authority: CN
Inventors: 张俊; 闫林刚
Original assignee: Shenzhen Daken Technology Co ltd
Current assignee: Shenzhen Daken Technology Co ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-07-23
Anticipated expiration: 2030-10-30

Abstract

The embodiment of the utility model discloses multichannel air pump, including frame, plunger drive arrangement and at least two sets of imbibition subassembly, the imbibition subassembly with plunger drive arrangement install in the frame, the imbibition subassembly is in including the cylinder body that is used for connecting the sampling head and setting in the cylinder body and with cylinder body sliding connection's plunger, the plunger stretches out the one end of cylinder body with connect through the drive block between plunger drive arrangement's the output, plunger drive arrangement passes through the drive block drives the plunger along the axial of cylinder body makes a round trip to slide. Only one set of plunger driving device is needed to control the simultaneous movement of a plurality of liquid suction assemblies, and further, the liquid taking amount error between each independent liquid suction assembly is reduced. The utility model discloses can realize the synchronous operation through a set of plunger drive arrangement control between the well imbibition subassembly, reduce the running error and simple structure, the compactness of imbibition subassembly.

Description

Multi-channel air pump

Technical Field

The utility model relates to an automatic change liquid treatment technical field, especially relate to a multichannel air pump.

Background

A pipette is a tool commonly used in the fields of medical treatment, laboratories, and the like, and a multichannel pipette having a plurality of sampling heads is required to improve sampling efficiency due to pipetting, detection, and the like of various reagents. The multichannel pipettor can need adjust the interval in order to adapt to the container of different intervals between each suction head, therefore current multichannel pipettor need dispose an air pump for each sampling unit alone, leads to producing the error easily between a plurality of sampling units, and equipment overall structure is complicated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a multichannel air pump for solve the complicated problem of structure among the prior art. For reaching above-mentioned one or part or whole purpose or other purposes, the utility model provides a multichannel air pump, including frame, plunger drive arrangement and at least two sets of imbibition subassembly, the imbibition subassembly with plunger drive arrangement install in the frame, the imbibition subassembly is in including the cylinder body that is used for connecting the sampling head and setting in the cylinder body and with cylinder body sliding connection's plunger, the plunger stretches out the one end of cylinder body with connect through the drive block between plunger drive arrangement's the output, plunger drive arrangement passes through the drive block drives the plunger along the axial of cylinder body makes a round trip to slide.

Preferably, the multi-channel air pump further comprises a distance adjustment mechanism for adjusting the spacing of the pipetting assembly; the plunger with be equipped with the mounting panel between the drive block, the mounting panel with drive block fixed connection, be equipped with on the mounting panel and follow the first guide rail of imbibition subassembly interval direction of change, correspond on the plunger first guide rail is equipped with first slider, first slider along first guide rail slides and makes the plunger is relative the drive block slides.

Preferably, the frame is further provided with a guide shaft parallel to the first guide rail, the liquid suction assembly is provided with a connecting block corresponding to the guide shaft, and the connecting block is slidably connected with the guide shaft so that the liquid suction assembly slides along the guide shaft.

Preferably, a linear bearing is arranged at the joint of the connecting block and the guide shaft.

Preferably, the plunger driving device comprises a motor, a motor fixing plate and a second guide rail for the driving block to slide.

Preferably, roll adjustment mechanism includes the sub-plywood and drives the deciliter drive arrangement that the sub-plywood removed, it is used for adjusting to be equipped with a plurality of spouts on the sub-plywood the position of imbibition subassembly, the imbibition subassembly corresponds the spout is equipped with the locating pin, the locating pin along slide in the spout, adjacent two distance between the spout is the gradual change form.

Preferably, each sliding chute is divided into a first straight line section, an inclined line section and a second straight line section along the axial direction of the cylinder body, the first straight line section and the second straight line section are parallel to each other in the axial direction of the cylinder body, and two ends of the inclined line section are respectively connected between the first straight line section and the second straight line section.

Preferably, the first straight line segment intervals of the sliding chutes are equal, the second straight line segment intervals of the adjacent sliding chutes are equal, and the first straight line segment intervals are not equal to the second straight line segment intervals.

Preferably, the multi-channel air pump further comprises a sample removing head plate for removing each sampling head, and the sample removing head plate is provided with a through hole for each sampling head to penetrate through.

Preferably, push plate hooks are arranged on two sides of the separating and combining plate, and the sample removing head plate further comprises push plate guide shafts and return springs, wherein the push plate guide shafts correspond to the push plate hooks, and the return springs are sleeved on the push plate guide shafts.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

after the multi-channel air pump structure is adopted, a liquid suction pump does not need to be configured for each liquid suction assembly independently, and a plurality of liquid suction assemblies can be controlled to move simultaneously only by a group of plunger driving devices, so that the liquid taking amount error between each independent liquid suction assembly is reduced. The utility model discloses can realize the synchronous operation through a set of plunger drive arrangement control between the well imbibition subassembly, reduce the running error and simple structure, the compactness of imbibition subassembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a schematic structural diagram of a multi-channel air pump according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a partial structure provided in the embodiment of the present invention.

FIG. 3 is an exploded view of the multi-channel air pump of the embodiment of FIG. 1.

Fig. 4 is a schematic structural diagram of two adjacent liquid suction assemblies provided by the embodiment of the present invention.

Fig. 5 is a cross-sectional view of one of the viewing angles of the wicking assembly shown in fig. 4.

Fig. 6 is a schematic structural view of a distance adjusting mechanism according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a plywood provided by the embodiment of the invention.

Fig. 8 is a schematic view of the connection relationship between the liquid suction assembly and the guide shaft when the liquid suction assembly is gathered.

Fig. 9 is a schematic view of the connection relationship between the liquid suction assembly and the guide shaft when the liquid suction assembly is separated according to the embodiment of the present invention.

Fig. 10 is a schematic view of the connection relationship between the scattered liquid suction assembly and the guide shaft according to the embodiment of the present invention.

Fig. 11 is a schematic diagram of a position relationship of the head plate for taking off samples provided by the embodiment of the present invention.

In the figure: 100-frame, 110-guide shaft, 200-imbibing component, 210-sampling head, 220-cylinder, 230-plunger, 240-plunger guide sleeve, 250-plunger push block, 260-first slide block, 270-connecting block, 271-mounting hole, 272-connecting hole, 273-positioning pin, 300-plunger driving device, 310-first motor, 311-nut, 320-motor fixing plate, 330-second guide rail, 400-driving block, 410-mounting plate, 411-first guide rail, 500-division plate, 510-sliding groove, 511-first straight line segment, 512-inclined line segment, 513-second straight line segment, 600-division driving device, 700-division sampling head plate, 710-push plate hook and 720-push plate guide shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 5, as one of the embodiments of the present invention, the multi-channel air pump includes a frame 100, a liquid absorbing assembly 200 disposed in the frame 100, a plunger driving device 300, and a distance adjusting mechanism for adjusting the distance between the liquid absorbing assemblies 200.

The pipette assembly 200 is for accessing fluids and includes a cylinder 220 for connecting to the sampling head 210 and a plunger 230 slidably connected within the cylinder 220. The plunger driving device 300 is connected with one end of the plunger 230 extending out of the cylinder 220 through a driving block 400 and a mounting plate 410, and is used for driving the plunger 230 to slide along the cylinder 220 in the axial direction of the cylinder for taking and putting liquid. The distance adjusting mechanism drives the liquid suction assembly 200 to change the distance between the adjacent liquid suction assemblies 200, correspondingly, the plunger 230 slides along the whole separation and combination direction of the liquid suction assembly relative to the driving block 400, and the driving block 400 can still drive the plunger 230 to slide, so that the normal use of the plunger 230 is not influenced.

Specifically, when the liquid taking assembly is used, the sampling head 210 is vertically downward, and the output end of the motor drives the driving plate to slide up and down, so that the plunger 230 is pushed to slide up and down in the cylinder 220. Further, a relatively fixed mounting plate 410 is arranged on the driving block 400, a first guide rail 411 in the horizontal direction is arranged on the mounting plate 410, a first slider 260 is arranged on the plunger 230 corresponding to the first guide rail 411, and the plunger 230 slides along the first guide rail 411 through the first slider 260.

Preferably, the mounting plate 410 is provided with two first guide rails 411 arranged oppositely, and two adjacent first sliders 260 are respectively located on different first guide rails 411, that is, the first sliders 260 are arranged on the two first guide rails 411 in an staggered manner, so that the distance between the two first sliders 260 on the same first guide rail 411 is increased, and the sliding is more flexible.

Further, the plunger driving means 300 includes a first motor 310, a motor fixing plate 320, and a second guide rail 330 for restraining the driving block 400. The motor fixing plate 320 is used to fix the first motor 310 to the frame 100.

Referring to fig. 2, as an embodiment of the present invention, the first motor 310 is a screw motor. The screw rod at the output end of the first motor 310 is connected with the drive plate through a screw nut 311, and the screw nut 311 is in threaded fit with the screw rod to convert the circumferential rotation of the screw rod into linear motion along the axial direction of the screw rod, so that the drive plate is driven to move up and down. The driving plate is connected with the frame 100 through the first guide rail 411 and the first slider 260, so that the movement track of the driving block 400 is further constrained, and the movement of the plunger 230 is smoother. The motor fixing plate 320 is provided with through holes corresponding to the lead screws and arranged at two ends of the lead screws, and the lead screws penetrate through the through holes. The motor fixing plate 320 also serves to isolate the lead screw, thereby preventing other objects from directly contacting the lead screw.

Optionally, two motor fixing plates 320 are included and respectively disposed at two ends of the screw rod, and two ends of the first guide rail 411 are respectively connected to the two motor fixing plates 320, so that the first slider 260 slides between the two motor fixing plates 320.

Referring to fig. 3, as an embodiment of the present invention, the frame 100 is further provided with a guide shaft 110 parallel to the first guide rail 411, and the liquid absorbing assembly 200 moves along the guide shaft 110 under the action of external control to adjust the distance between the two guide shafts, so as to adapt to different liquid containers. Correspondingly, the wicking assembly 200 further includes a connecting block 270 for connecting the guide shaft 110, the connecting block 270 being slidably connected with respect to the guide shaft 110.

Furthermore, a connecting hole 272 for passing through the guide shaft 110 is formed in the connecting block 270, and a linear bearing is sleeved at the connecting position of the guide shaft 110 and the connecting block 270. Alternatively, there are a plurality of guide shafts 110 and corresponding coupling holes 272 on each of the coupling blocks 270, and two adjacent liquid suction assemblies 200 are alternately coupled to different guide shafts 110.

The connection manner of the first slider 260 and the first guide rail 411 connected in an interlaced manner in the present embodiment is similar, and all that is needed is to make the connection between two adjacent liquid suction assemblies 200 have a space that is mutually avoided, so that the structure is more flexible and the operation is stable.

Specifically, as shown in fig. 4 and 5, in the liquid suction assembly 200, a mounting hole 271 is formed on the connecting block 270, the cylinder 220 and the plunger 230 are respectively connected in the connecting block 270 through the mounting hole 271, the cylinder 220 is embedded in the connecting block 270, the lower end of the cylinder extends out of the mounting hole 271 to be connected with the sampling head 210, and the plunger 230 extends in from the upper end of the cylinder 220. Preferably, a spring is arranged between the cylinder 220 and the connecting block 270 to play a role of buffering. A plunger guide sleeve 240 is arranged between the plunger 230 and the mounting hole 271, the top end of the guide sleeve is fixed with a plunger push block 250, and the plunger push block 250 is connected with the first slide block 260. The plunger pusher block 250 functions to receive the first slider 260 and the plunger guide sleeve 240.

Referring to fig. 6, as a specific embodiment provided by the present invention, the distance adjusting mechanism is used for adjusting the distance of the liquid absorbing assembly 200, the distance adjusting mechanism includes the sub-combination plate 500 and the sub-combination driving device 600 for driving the sub-combination plate 500 to move, the sub-combination plate 500 is provided with a plurality of sliding slots 510 for adjusting the position of the liquid absorbing assembly 200, the distance between two adjacent sliding slots 510 is gradually changed, the connecting block 270 of the liquid absorbing assembly 200 is provided with a positioning pin 273 corresponding to the sliding slots 510, and the positioning pin 273 slides along the sliding slots 510. The opening and closing driving device 600 drives the opening and closing plate 500 to move back and forth, and the distance between the liquid suction components 200 is adjusted through the mutual matching of the sliding grooves 510 and the positioning pins 273.

Referring to fig. 7, as an embodiment of the present invention, the sliding slot 510 on the dividing and combining block is divided into a first straight line segment 511, an oblique line segment 512 and a second straight line segment 513 along the axial direction of the cylinder body, the first straight line segment 511 and the second straight line segment 513 are parallel to the axial direction of the cylinder body and are not collinear, and two ends of the oblique line segment 512 are respectively connected between the first straight line segment 511 and the second straight line segment 513. Further, the pitch of the first straight line segment 511 is different from the pitch of the second straight line segment 513, and the slanted line segment 512 is used for gradually changing the pitch of the two straight line segments in a transition manner.

With reference to the drawings, it will be understood that in the above-described structure, the movement of the positioning pins 273 along the slide grooves 510 is the process of adjusting the distance between the pipetting modules, and the distance between the adjacent slide grooves 510 is the distance between the adjacent pipetting modules 200. Specifically, referring to fig. 8 to 10, when the liquid suction assemblies 200 are fixed to each other in the horizontal direction, the engaging and disengaging plate 500 moves up and down to make the positioning pins 273 located at different sections of the sliding groove 510, and the distance between the liquid suction assemblies 200 can be indirectly adjusted because the distance between the sliding groove 510 and the different sections is gradually changed, and accordingly, the first slider 260 slides along the first guide rail 411 along with the plunger 230 without affecting the relative connection relationship between the plunger 230 and the driving block 400. The distance adjustment structure shown in this embodiment only requires one reciprocating motion of the sub-plate 500 in one direction to achieve the distance adjustment of the liquid suction assembly 200. The matching mode of the sliding groove 510 and the positioning pin 273 can accurately control the distance change, the accumulated error generated by the distance adjusting mode in the prior art is avoided to the greatest extent, the structure is simple, the operation is convenient, and the equipment cost is greatly saved.

Referring to fig. 11, as an embodiment of the present invention, the multi-channel air pump further includes a sample removing head plate 700 for removing each sampling head 210, and the sample removing head plate 700 is provided with a through hole for each sampling head 210 to pass through. Opposite to the push plate hooks 710, push plate guide shafts 720 corresponding to the push plate hooks 710 and return springs sleeved on the push plate guide shafts 720 are further included on the sample removing head plate 700.

Further, according to the movement process shown in fig. 8 to 10, when the combining plate 500 moves downward until the positioning pin 273 enters the first straight line segment 511, the push plate hook 710 abuts against the top end of the push plate guide shaft 720, and at this time, the positioning pin 273 is still at a certain distance from the topmost segment of the slide groove 510. The sub plate 500 continues to move downwards, so that the push plate hook 710 presses the push plate guide shaft 720 downwards, and the dephasing head plate 700 moves downwards to dephasing the sampling head 210. The division plate 500 moves upward and gradually releases the push plate guide shaft 720, and the head plate 700 returns to the initial position under the action of the return spring.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A multi-channel air pump characterized by: including frame, plunger drive arrangement and at least two sets of imbibition subassembly, imbibition subassembly with plunger drive arrangement install in the frame, the imbibition subassembly is in including the cylinder body that is used for connecting the sampling head and setting in the cylinder body and with cylinder body sliding connection's plunger, the plunger stretches out the one end of cylinder body with connect through the drive block between plunger drive arrangement's the output, plunger drive arrangement passes through the drive block drives the plunger along the axial of cylinder body is made a round trip to slide.

2. The multi-channel air pump of claim 1 wherein: the multi-channel air pump further comprises a distance adjusting mechanism for adjusting the distance between the liquid suction components; the plunger with be equipped with the mounting panel between the drive block, the mounting panel with drive block fixed connection, be equipped with on the mounting panel and follow the first guide rail of imbibition subassembly interval direction of change, correspond on the plunger first guide rail is equipped with first slider, first slider along first guide rail slides and makes the plunger is relative the drive block slides.

3. A multi-channel air pump as claimed in claim 2 wherein: still be equipped with on the frame with the guide shaft that first guide rail is parallel, imbibition subassembly corresponds the guide shaft is equipped with the connecting block, the connecting block is relative guide shaft sliding connection makes imbibition subassembly along the guide shaft slides.

4. A multi-channel air pump as claimed in claim 3 wherein: and a linear bearing is arranged at the joint of the connecting block and the guide shaft.

5. A multi-channel air pump as claimed in claim 2 wherein: the plunger driving device comprises a motor, a motor fixing plate and a second guide rail for the driving block to slide.

6. A multi-channel air pump as claimed in any one of claims 2 to 5 wherein: the roll adjustment mechanism includes that the minute plywood and drive the deciliter drive arrangement that the minute plywood removed, it is used for adjusting to be equipped with a plurality of spouts on the minute plywood the position of imbibition subassembly, the imbibition subassembly corresponds the spout is equipped with the locating pin, the locating pin along slide in the spout, adjacent two distance between the spout is the gradual change form.

7. A multi-channel air pump as claimed in claim 6 wherein: each sliding groove is divided into a first straight line section, an inclined line section and a second straight line section along the axial direction of the cylinder body, the first straight line section and the second straight line section are parallel to each other in the axial direction of the cylinder body, and two ends of the inclined line section are respectively connected between the first straight line section and the second straight line section.

8. The multi-channel air pump of claim 7 wherein: the first straight line section intervals of the adjacent sliding grooves are equal, the second straight line section intervals of the adjacent sliding grooves are equal, and the first straight line section intervals are not equal to the second straight line section intervals.

9. The multi-channel air pump of claim 6 wherein: the multi-channel air pump also comprises a sample removing head plate used for removing the sampling heads, and through holes for the sampling heads to penetrate through are formed in the sample removing head plate.

10. The multi-channel air pump of claim 9 wherein: the two sides of the separating and combining plate are provided with push plate hooks, and the sample removing head plate further comprises push plate guide shafts and reset springs, wherein the push plate guide shafts correspond to the push plate hooks, and the reset springs are sleeved on the push plate guide shafts.