Sheet-shaped single-channel pipetting module

Abstract

The utility model discloses a sheet-shaped single-channel pipetting module, which relates to the technical field of pipetting devices and comprises a fixed seat, a first sliding seat, a second sliding seat, a first power device, a liquid suction component, a third sliding seat and a pushing part, and the first sliding seat is in up-down sliding fit with the fixed seat; the second sliding seat is matched with the first sliding seat in an up-down sliding manner; the first power device is arranged on the first sliding seat and is in driving connection with the second sliding seat; the liquid suction component is arranged at the bottom of the first sliding seat, and one end of a piston rod of the liquid suction component is connected with the second sliding seat; the third sliding seat is located at the bottom of the first sliding seat, the third sliding seat is provided with a pushing arm, and the pushing arm is movably arranged at the tail end of the liquid suction component in a sleeving mode; and the pushing piece is arranged at the bottom of the first sliding seat in a manner of sliding up and down and is connected with the third sliding seat. The sheet-shaped single-channel pipetting module is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transfer devices, in particular to a sheet-shaped single-channel liquid transfer module. Background Art

[0002] The pipette is an essential experimental instrument in all biochemical laboratories for immunology, cell culture, clinical diagnosis and food analysis. The biochemical reagents can be transferred to specific experimental vessels through the pipette.

[0003] The liquid transfer device has a liquid suction component, and a pipette tip for liquid transfer is detachably mounted at the end of the liquid suction component. The liquid suction component realizes liquid suction or liquid discharge of the pipette tip by moving the piston rod. The pipette tip is a disposable consumable and needs to be replaced after completing a liquid collection. Currently, the driving device for realizing the movement of the piston rod and the driving device for realizing the detachment of the pipette tip are different power sources, which have the problems of complex structure, low precision, insufficient structural rigidity and high cost. Utility Model Content

[0004] The main purpose of the utility model is to provide a sheet-shaped single-channel liquid transfer module, aiming to provide a sheet-shaped single-channel liquid transfer module with a simple and stable structure, improved precision and reduced cost.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a sheet-shaped single-channel liquid transfer module, which comprises:

[0006] Fixed seat;

[0007] A first sliding seat, wherein the first sliding seat and the fixed seat slide together up and down;

[0008] a second sliding seat, the second sliding seat being slidably matched with the first sliding seat up and down;

[0009] A first power device, the first power device is disposed on the first sliding seat and is drivingly connected to the second sliding seat;

[0010] A liquid absorbing component, the liquid absorbing component is arranged at the bottom of the first sliding seat, the liquid absorbing component has a piston rod, and one end of the piston rod is connected to the second sliding seat;

[0011] A third sliding seat, the third sliding seat is located at the bottom of the first sliding seat, the third sliding seat is provided with a push-off arm, and the push-off arm is movably sleeved on the end of the liquid-absorbing component;

[0012] A pushing member, which is slidably disposed at the bottom of the first sliding seat and connected to the third sliding seat;

[0013] When the first power device drives the second sliding seat to slide downward until it abuts against the pushing member, the third sliding seat slides downward by pushing the pushing member, and the third sliding seat slides upward under the action of the reset component.

[0014] Optionally, the first sliding seat is provided with a first guide rail, and the second sliding seat and the third sliding seat are respectively provided with a first sliding block slidably matched with the first guide rail.

[0015] Optionally, the second sliding seat and the third sliding seat are both provided with a first assembly groove, and the first sliding block is arranged in the first assembly groove.

[0016] Optionally, the third sliding seat is provided with an avoidance groove, and the reset component comprises:

[0017] A limiting column, located in the avoidance groove, the limiting column comprises a connecting column and an abutting portion, one end of the connecting column passes through the third sliding seat and is connected to the first sliding seat;

[0018] A return spring is sleeved on the connecting column, one end of the return spring abuts against the abutting portion, and the other end of the return spring abuts against the third sliding seat.

[0019] Optionally, the first power device comprises:

[0020] A first motor, wherein the first motor is disposed on the top of the first sliding seat;

[0021] a first screw rod, the first screw rod being rotatably disposed on the first sliding seat and connected to an output shaft of the first motor;

[0022] A first nut seat, wherein the first nut seat is disposed on the second sliding seat and is threadably matched with the first screw rod.

[0023] Optionally, the first sliding seat is further provided with a placement groove, the first power device further comprises a rotating bearing, the rotating bearing is mounted in the placement groove, and one end of the first screw rod away from the first motor is rotationally matched with the rotating bearing.

[0024] Optionally, the fixed seat is provided with a sensor, and the first sliding seat is provided with a sensing sheet.

[0025] Optionally, the fixed seat is provided with a second guide rail, and the first sliding seat is provided with a second sliding block that is slidably matched with the second guide rail.

[0026] Optionally, the first sliding seat is provided with a second assembly groove, and the second sliding block is arranged in the second assembly groove.

[0027] Optionally, the sheet-shaped single-channel pipetting module further includes a second power device, which is disposed on the fixed seat and is drivingly connected to the first sliding seat.

[0028] The technical solution of the utility model includes a fixed seat, a first sliding seat, a second sliding seat, a first power device, a liquid suction component, a third sliding seat and a pushing member. When the first power device drives the second sliding seat to slide downward until it abuts against the pushing member, the third sliding seat is pushed downward by pushing the pushing member, and the pushing and releasing arm of the third sliding seat moves downward synchronously and causes the suction head to separate from the liquid suction component. Since the same power source is used to realize the technical means of discharging liquid from the liquid suction component and separating from the suction head, the technical problems of complex structure and high cost in the prior art in which different power sources are used to realize the movement of the piston rod and the separation of the suction head respectively, thereby achieving the technical effects of simple and stable structure, improved precision and reduced cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of an embodiment of a sheet-shaped single-channel liquid transfer module of the utility model;

[0030] Figure 2 This is a schematic front view of a sheet-shaped single-channel pipetting module of the utility model;

[0031] Figure 3 It is a left side schematic diagram of a sheet-shaped single-channel liquid transfer module of the utility model;

[0032] Figure 4 It is a structural schematic diagram of the first sliding seat of the utility model;

[0033] Description of Figure Numbers:

[0034] A sheet-shaped single-channel pipetting module 100; a fixed seat 10; a sensor 11; a second guide rail 12; a first sliding seat 20; a first guide rail 21; a placement groove 22; a guide rail groove 23; a sensor sheet 24; a second slider 25; a second assembly groove 26; a second sliding seat 30; a first slider 31; a first assembly groove 32; a first power device 40; a first motor 41; a first screw rod 42; a first nut seat 43; a rotating bearing 44; a liquid suction component 50; a piston rod 51; a third sliding seat 60; a push arm 61; a pusher 70; a reset component 80; a limit column 81; a reset spring 82; and a second power device 90. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] The utility model provides a sheet-shaped single-channel liquid transfer module 100 .

[0040] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] In the embodiment of the present utility model, as Figures 1 to 3As shown, the sheet-like single-channel pipetting module 100 includes a fixed seat 10, a first sliding seat 20, a second sliding seat 30, a first power device 40, a liquid absorbing component 50, a third sliding seat 60 and a pusher 70, wherein the first sliding seat 20 and the fixed seat 10 are slidably matched up and down; the second sliding seat 30 and the first sliding seat 20 are slidably matched up and down; the first power device 40 is arranged on the first sliding seat 20 and is drivingly connected to the second sliding seat 30; the liquid absorbing component 50 is arranged at the bottom of the first sliding seat 20, and the liquid absorbing component 50 has a piston rod 51, and the piston rod 51 One end of the third sliding seat 60 is connected to the second sliding seat 30; the third sliding seat 60 is located at the bottom of the first sliding seat 20, and the third sliding seat 60 is provided with a push-off arm 61, which can be movably mounted on the end of the liquid-absorbing component 50; the pushing member 70 is slidably arranged at the bottom of the first sliding seat 20 and is connected to the third sliding seat 60; when the first power device 40 drives the second sliding seat 30 to slide downward until it abuts against the pushing member 70, the third sliding seat 60 slides downward by pushing the pushing member 70, and the third sliding seat 60 slides upward under the action of the reset component 80.

[0042] The second sliding seat 30 is moved away from the pushing member 70, and the third sliding seat 60 is driven by the reset member 80 to slide upward until it abuts against the bottom of the first sliding seat 20. The utility model utilizes the downward sliding stroke of the piston rod 51 after the completion of the discharge to realize the detachment of the suction head, that is, the two different processes can be realized by the same power source, the structure is simple and the cost is reduced. In addition, the first sliding seat 20 and the fixed seat 10 are matched to slide up and down, so that the first sliding seat 20 and various components arranged on the first sliding seat 20 can slide up and down synchronously as a whole.

[0043] The technical solution of the utility model includes a fixed seat 10, a first sliding seat 20, a second sliding seat 30, a first power device 40, a liquid suction component 50, a third sliding seat 60 and a pushing member 70. When the first power device 40 drives the second sliding seat 30 to slide downward until it abuts against the pushing member 70, the third sliding seat 60 slides downward by pushing the pushing member 70, and the pushing arm 61 of the third sliding seat 60 moves downward synchronously and causes the suction head to detach from the liquid suction component 50. Since the same power source is used to realize the technical means of draining the liquid from the liquid suction component 50 and detaching from the suction head, the technical problems of complex structure and high cost in the prior art in which different power sources are used to realize the movement of the piston rod and the detachment of the suction head respectively are effectively solved, thereby achieving the technical effects of simple and stable structure, improved precision and reduced cost.

[0044] In the embodiment of the present utility model, as Figure 1 and Figure 2 As shown, the first sliding seat 20 is provided with a first guide rail 21 , and the second sliding seat 30 and the third sliding seat 60 are respectively provided with a first sliding block 31 slidably matched with the first guide rail 21 .

[0045] In the present utility model, if Figure 1 , Figure 2 and Figure 4 As shown, the first sliding seat 20 has an upper connecting plate and a lower connecting plate, and the upper connecting plate and the lower connecting plate are respectively provided with guide rail grooves 23. The first guide rail 21 is respectively fixed in the guide rail grooves 23 of the upper connecting plate and the lower connecting plate. The second sliding seat 30 slides between the upper and lower connecting plates. The bottom end of the first guide rail 21 extends downward and slides with the third sliding seat 60 located at the bottom of the first sliding part.

[0046] In the embodiment of the present utility model, as Figure 1 and Figure 2 As shown, the second sliding seat 30 and the third sliding seat 60 are both provided with a first assembly groove 32 , and the first sliding block 31 is disposed in the first assembly groove 32 .

[0047] The utility model adopts an embedded manner to install the first slider 31, which is convenient for fixing the slider on the one hand, and reduces the overall size after assembly on the other hand, making the structure compact and reducing the assembly space. The second sliding seat 30 and the third sliding seat 60 of the utility model are each provided with a first slider 31. At the same time, the downward extending length of the first guide rail 21 is greater than the length of the first slider 31. The third sliding seat 60 is provided with a matching groove that matches the first guide rail 21, so that when the third sliding seat 60 slides downward, the first slider 31 does not separate from the first guide rail 21.

[0048] In the embodiment of the present utility model, as Figure 3As shown, the third sliding seat 60 is provided with an avoidance groove, and the reset component 80 includes a limiting column 81 and a reset spring 82, wherein the limiting column 81 is located in the avoidance groove, and the limiting column 81 includes a connecting column and an abutting portion, one end of the connecting column passes through the third sliding seat 60 and is connected to the first sliding seat 20; the reset spring 82 is sleeved on the connecting column, one end of the reset spring 82 abuts against the abutting portion, and the other end of the reset spring 82 abuts against the third sliding seat 60.

[0049] It can be understood that when the second sliding seat 30 pushes the pushing member 70 to cause the third sliding seat 60 to slide downward synchronously, the third sliding seat 60 compresses the return spring 82. When the second sliding seat 30 moves away from the pushing member 70, the return spring 82 recovers, and the third sliding seat 60 slides upward under the action of the spring force until it abuts against the bottom of the first sliding seat 20.

[0050] In the embodiments of the present invention, Figure 1 and Figure 2 As shown, the first power device 40 includes a first motor 41, a first screw rod 42 and a first nut seat 43, wherein the first motor 41 is arranged on the top of the first sliding seat 20; the first screw rod 42 is rotatably arranged on the first sliding seat 20 and is connected to the output shaft of the first motor 41; the first nut seat 43 is arranged on the second sliding seat 30 and is threadedly matched with the first screw rod 42.

[0051] The utility model adopts a screw transmission mechanism, and adding a first guide rail 21 and a first screw 42 can improve the positioning accuracy. The motor drives the screw to rotate so that the nut seat and the second sliding block on which the nut seat is installed slide up and down synchronously. The second sliding seat 30 is provided with a nut groove, and the first nut seat 43 is installed in the nut groove. The nut groove and the first assembly groove 32 are located on the same side of the second sliding seat 30, that is, the reference surfaces of different grooves are unified during processing, and multiple clamping is not required, thereby ensuring concentricity, parallelism and positioning.

[0052] In the embodiments of the present invention, Figure 1 , Figure 2 and Figure 4 As shown, the first sliding seat 20 is further provided with a placement groove 22 , and the first power device 40 further includes a rotating bearing 44 , which is installed in the placement groove 22 , and one end of the first screw rod 42 away from the first motor 41 is rotatably matched with the rotating bearing 44 .

[0053] In the present invention, the placement groove 22 and the guide rail groove 23 of the installation guide rail are located on the same side of the first sliding seat 20, and the processing of the second sliding seat 30 is similar, and the processing reference surface is unified to ensure the processing accuracy.

[0054] In the embodiments of the present invention, Figure 1 and Figure 2As shown, the fixed seat 10 is provided with a sensor 11, and the first sliding seat 20 is provided with a sensing sheet 24. In the present invention, in order to detect the relative position of the fixed seat 10 and the first sliding seat 20, the sensor 11 and the sensing sheet 24 are provided to perform position detection.

[0055] In the embodiment of the present utility model, as Figure 1 and Figure 2 As shown, the fixed seat 10 is provided with a second guide rail 12, and the first sliding seat 20 is provided with a second slider 25 that slides with the second guide rail 12. The sliding cooperation mode between the fixed seat 10 and the first sliding seat 20 is the same as the sliding cooperation mode between the second sliding seat 30 and the first sliding seat 20, and therefore has the same technical effect, which will not be described in detail.

[0056] In the embodiment of the present utility model, as Figure 1 , Figure 2 and Figure 4 As shown, the first sliding seat 20 is provided with a second assembly groove 26, and the second slider 25 is arranged in the second assembly groove 26. The second assembly groove 26 and other processing grooves are located on the same side to ensure processing accuracy. Two second sliders 25 are arranged in the second assembly groove 26 of the utility model.

[0057] In the embodiment of the present utility model, as Figure 1 and Figure 2 As shown, the sheet-shaped single-channel pipetting module 100 further includes a second power device 90 , which is disposed on the fixed seat 10 and is drivingly connected to the first sliding seat 20 .

[0058] In the present utility model, if Figure 1 and Figure 2 As shown, the structure of the second power device 90 is the same as that of the first power device 40, both of which are screw transmission mechanisms, and their specific structures are not described in detail.

[0059] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sheet-shaped single-channel pipetting module, characterized in that: The sheet-shaped single-channel pipetting module comprises: Fixed seat; A first sliding seat, wherein the first sliding seat and the fixed seat slide together up and down; a second sliding seat, the second sliding seat being slidably matched with the first sliding seat up and down; A first power device, the first power device is disposed on the first sliding seat and is drivingly connected to the second sliding seat; A liquid absorbing component, the liquid absorbing component is arranged at the bottom of the first sliding seat, the liquid absorbing component has a piston rod, and one end of the piston rod is connected to the second sliding seat; A third sliding seat, the third sliding seat is located at the bottom of the first sliding seat, the third sliding seat is provided with a push-off arm, and the push-off arm is movably sleeved on the end of the liquid-absorbing component; A pushing member, which is slidably disposed at the bottom of the first sliding seat and connected to the third sliding seat; When the first power device drives the second sliding seat to slide downward until it abuts against the pushing member, the third sliding seat slides downward by pushing the pushing member, and the third sliding seat slides upward under the action of the reset component.

2. The sheet-shaped single-channel pipetting module according to claim 1, characterized in that: The first sliding seat is provided with a first guide rail, and the second sliding seat and the third sliding seat are respectively provided with a first sliding block slidably matched with the first guide rail.

3. The sheet-shaped single-channel pipetting module according to claim 2, characterized in that: The second sliding seat and the third sliding seat are both provided with a first assembly groove, and the first sliding block is arranged in the first assembly groove.

4. The sheet-shaped single-channel pipetting module according to claim 1, characterized in that: The third sliding seat is provided with an avoidance groove, and the reset component comprises: A limiting column, located in the avoidance groove, the limiting column comprises a connecting column and an abutting portion, one end of the connecting column passes through the third sliding seat and is connected to the first sliding seat; A return spring is sleeved on the connecting column, one end of the return spring abuts against the abutting portion, and the other end of the return spring abuts against the third sliding seat.

5. The sheet-shaped single-channel pipetting module according to claim 1, characterized in that: The first power device comprises: A first motor, wherein the first motor is disposed on the top of the first sliding seat; a first screw rod, the first screw rod being rotatably disposed on the first sliding seat and connected to an output shaft of the first motor; A first nut seat, wherein the first nut seat is disposed on the second sliding seat and is threadably matched with the first screw rod.

6. The sheet-shaped single-channel liquid transfer module according to claim 5, characterized in that: The first sliding seat is further provided with a placement groove, the first power device further comprises a rotating bearing, the rotating bearing is installed in the placement groove, and one end of the first screw rod away from the first motor is rotationally matched with the rotating bearing.

7. The sheet-shaped single-channel pipetting module according to claim 1, characterized in that: The fixed seat is provided with a sensor, and the first sliding seat is provided with a sensing sheet.

8. The sheet-shaped single-channel pipetting module according to any one of claims 1 to 7, characterized in that: The fixed seat is provided with a second guide rail, and the first sliding seat is provided with a second sliding block slidably matched with the second guide rail.

9. The sheet-shaped single-channel liquid transfer module according to claim 8, characterized in that: The first sliding seat is provided with a second assembly groove, and the second sliding block is arranged in the second assembly groove.

10. The sheet-shaped single-channel pipetting module according to claim 8, characterized in that: The sheet-shaped single-channel pipetting module further includes a second power device, which is disposed on the fixed seat and is drivingly connected to the first sliding seat.

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