CN218981619U

CN218981619U - Single-channel pipetting distance-changing module

Info

Publication number: CN218981619U
Application number: CN202223358834.9U
Authority: CN
Inventors: 郭燕
Original assignee: Changzhou Guangyuye Electromechanical Co ltd
Current assignee: Changzhou Guangyuye Electromechanical Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-09
Anticipated expiration: 2032-12-14

Abstract

The utility model relates to a single-channel liquid-transferring and distance-changing module which comprises a frame, a motor, a driving module and a liquid-transferring module, wherein the driving module comprises a screw rod, a connecting plate, a screw rod nut, a guide rod and a piston rod, the liquid-transferring module comprises a cavity, a gun head fixing block, a movable rod, a yielding piece and a gun head, the cavity is fixed in the frame, the gun head fixing block is fixed at the bottom end of the cavity, an air passage communicated with the cavity is formed in the gun head fixing block, the gun head is fixed at one end of the gun head fixing block, a cavity communicated with the air passage is formed in the gun head, the movable rod slides on the gun head fixing block, one end of the yielding piece is fixed with the movable rod, the other end of the yielding piece is sleeved outside the gun head, and the top end face of the yielding piece is elastically connected with the bottom end face of the gun head fixing block through a spring. The single-channel pipetting distance changing module adopts pressure detection and capacitance detection, can detect whether consumable materials on a gun head are blocked by foreign matters, and has different air pressures of different liquid consistencies and different air pressures of different liquid heights, so that accurate pipetting is realized.

Description

Single-channel pipetting distance-changing module

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a single-channel pipetting displacement module.

Background

With the development of technology, the medical technology level is also improved remarkably. In medical experiments, it is necessary to mix one solution with another solution or to transfer one solution to a specific location, during which a pipetting device is used for pipetting.

The existing single-channel structure such as a single-tube automatic pipetting mechanism of CN215783458U applied by the applicant in the prior art is complex in structure, large in whole size and high in manufacturing cost.

Disclosure of Invention

Aiming at the defects in the prior art, the single-channel pipetting module provided by the utility model has the advantages of simple structure, convenience in assembly, low noise and capability of accurately sensing pipetting states.

The utility model is realized by the following technical scheme:

the single-channel pipetting variable-pitch module comprises a frame, a motor, a driving module and a pipetting module, wherein the motor is fixed on the frame, the driving module is connected with the motor, the pipetting module is connected with the driving module, the driving module comprises a screw rod, a connecting plate, a screw rod nut, a guide rod and a piston rod, the screw rod is connected with an output shaft of the motor, the screw rod nut is connected with the screw rod, the guide rod is fixed in the frame and parallel to the screw rod, the connecting plate is fixed with the screw rod nut and sleeved outside the guide rod, the motor can drive the connecting plate to move up and down along the screw rod and the guide rod, and the piston rod is fixed at the bottom end of the connecting plate and parallel to the screw rod;

the liquid transferring module comprises a cavity, a gun head fixing block, a movable rod, a yielding piece and a gun head, wherein the cavity is fixed in the frame and sleeved outside the piston rod, the gun head fixing block is fixed at the bottom end of the cavity, an air passage communicated with the cavity is formed in the gun head fixing block, the gun head is fixed at one end of the gun head fixing block, a cavity communicated with the air passage is formed in the gun head, the movable rod penetrates through the gun head fixing block and is in sliding connection with the gun head fixing block, one end of the yielding piece is fixedly connected with the movable rod, the other end of the yielding piece is sleeved outside the gun head and can slide along the gun head, and the top end face of the yielding piece is in elastic connection with the bottom end face of the gun head fixing block through a spring.

In a preferred embodiment of the present utility model, in order to accurately sense whether each component moves in place, the single-channel pipetting displacement module further includes a circuit board, the circuit board is fixed on one side of the rack, a first photoelectric switch is disposed on the circuit board, and a first sensing block corresponding to the first photoelectric switch is fixed on one side of the connecting plate; and similarly, a second photoelectric switch is arranged on the circuit board, and a second sensing block corresponding to the second photoelectric switch is fixed at the top end of the movable rod.

In order to detect the liquid pressure in the consumable on the gun head, a barometer is arranged on the circuit board, and one side of the cavity is provided with an air pipe for communicating with the barometer and the cavity inner cavity; correspondingly, the circuit board is provided with a capacitance joint, the gun head fixing block is fixedly provided with a copper conductive piece, and the copper conductive piece is connected with the capacitance joint.

In order to realize displacement pipetting, the gun head is arranged at one end, far away from the cavity, of the gun head fixing block, namely, the gun head is not coaxial with the piston rod.

The beneficial effects of the utility model are as follows: the single-channel pipetting distance changing module adopts pressure detection and capacitance detection, can detect whether consumable materials on a gun head are blocked by foreign matters, and has different air pressures of different liquid consistencies and different air pressures of different liquid heights, so that accurate pipetting is realized.

Drawings

Fig. 1 is a schematic perspective view of a single-channel pipetting pitch-changing module of the utility model;

fig. 2 is a schematic diagram of an internal structure of the single-channel pipetting pitch module of the utility model.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model. The directional terms referred to in the present utility model, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model.

The single-channel pipetting and distance-changing module shown in fig. 1 comprises a frame 2, a motor 1 fixed at the top of the frame 2, a driving module connected with the motor 1 and a pipetting module connected with the driving module, wherein a housing 3 is arranged outside the frame 2.

Specifically, referring to fig. 2, the driving module includes a screw rod 4, a connecting plate 6, a screw rod nut 5, a guide rod 7 and a piston rod 11, the screw rod 4 is connected with an output shaft of the motor 1, the screw rod nut 5 is in threaded connection with the screw rod 4, the guide rod 7 is fixed in the frame 2 and parallel to the screw rod 4, the bottom end of the guide rod 7 is supported by a supporting block 8, the connecting plate 6 is fixed with the screw rod nut 5 and sleeved outside the guide rod 7, the motor 1 can drive the connecting plate 6 to move up and down along the screw rod 4 and the guide rod 7, and the piston rod 11 is fixed at the bottom end of the connecting plate 6 and parallel to the screw rod 4;

specifically, the pipetting module includes cavity 12, rifle head fixed block 19, movable rod 21, give back piece 20 and rifle head 13, cavity 12 is fixed in frame 2 and cover locates outside piston rod 11, and piston rod 11 stretches into in the cavity 12 promptly, rifle head fixed block 19 is fixed in cavity 12 bottom, offered the air flue that is linked together with cavity 12 inner chamber in the rifle head fixed block 19, rifle head 13 is fixed in the one end that rifle head fixed block 19 kept away from cavity 12, rifle head 13 is vertically downwards, has the cavity that is linked together with the air flue in the rifle head 13, movable rod 21 runs through rifle head fixed block 19 top and bottom perpendicularly and with rifle head fixed block 19 sliding connection, give back piece 20 one end is fixed with movable rod 21 mutually, and another end cover is located outside rifle head 13 and with rifle head 13 sliding connection, and give back piece 20 top end face and the one end face of rifle head fixed block 19 between through spring 22 elastic connection, spring 22 cover locates outside the movable rod 21 bottom.

In addition, a circuit board 9 is fixed on one side of the frame 2, a first photoelectric switch 14 and a second photoelectric switch 16 are arranged on the circuit board 9, the second photoelectric switch 16 is positioned at the bottom end of the circuit board 9, a first sensing block 15 corresponding to the first photoelectric switch 14 is fixed on one side of the connecting plate 6, the first photoelectric switch 14 can sense the position of the first sensing block 15, a second sensing block 17 corresponding to the second photoelectric switch 16 is fixed on the top end of the movable rod 21, the second sensing block 17 is supported and limited by a gun head fixing block 19, and the second photoelectric switch 16 can sense the position of the second sensing block 17; the circuit board 9 is also provided with a barometer 18, one side of the cavity 12 is provided with an air pipe 10 used for communicating the barometer 18 with the inner cavity of the cavity 12, one end of the barometer 18 is communicated with the cavity 12, and the other end is connected with atmospheric pressure; the bottom of the circuit board 9 is provided with a capacitor joint 23, the top of the gun head fixing block 19 is fixed with a copper conducting piece 24, and the copper conducting piece 24 is connected with the capacitor joint 23.

When the motor 1 rotates, the screw nut 5 is driven to move along the screw rod 4, so that the connecting plate 6, the piston rod 11 and the gun head 13 are driven to move up and down, the piston rod 11 moves up and down to generate air pressure in the cavity 12, consumable materials filled with liquid are arranged on the gun head 13, the inner cavity of the cavity 12 is communicated with the inner cavity of the gun head 13 through an air circuit, and then the liquid suction and liquid discharge operation of the consumable materials is completed; the detection position of the first photoelectric switch 14 is a zero point position, liquid is absorbed upwards, the consumable material is moved downwards by 5mm, the second photoelectric switch 16 is used for detecting the consumable material in place, the consumable material is arranged on the gun head 13, the yielding piece 20 is extruded, the yielding piece 20, the movable rod 21 and the second sensing block 17 move upwards, the second photoelectric switch 16 is triggered, and whether the consumable material is arranged is detected; the liquid level detection adopts pressure detection combined with capacitance detection, the liquid level detection is connected to the barometer 18 through the air pipe 10, one end of the liquid level detection is connected with the cavity 12, and the other end of the liquid level detection is connected with the atmospheric pressure, when the consumable is mounted on the gun head 13, liquid exists in the consumable, the liquid in the consumable can influence the air pressure in the consumable, the air pressure in the consumable is communicated with the air pressure in the cavity 12, the air pressure in the cavity 12 is communicated with one hole of the barometer 18, and the other hole of the barometer 18 is exposed to the atmospheric pressure, so that the change of the air pressure in the consumable can be influenced by the height of the liquid in the consumable, the barometer 18 is used for comparing the atmospheric pressure at the moment with the air pressure in the consumable, and particularly, whether the consumable is blocked by foreign matters or not can be detected, the different air pressures of different liquid heights are different; the capacitive detection is to provide weak current through the circuit board 9, provide stainless steel screws through the pogpin capacitive connector 23 and the copper conductive piece 24, the screws are connected with the gun head 13 through conductive sheets, so that a loop is formed, when conductive tip consumable materials are mounted on the gun head 13, liquid is sucked in the tip consumable materials, and the height change of the liquid corresponds to the change of the current.

It should be noted that the present utility model is not related to the present utility model, and is partially the same as or can be implemented by the prior art.

In addition, in the description of embodiments of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "configured," "provided," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The utility model provides a single channel pipetting displacement module, includes the frame, fixes the motor in the frame, the drive module group that links to each other with the motor and the pipetting module group that links to each other with the drive module group, the drive module group includes lead screw, connecting plate, screw nut, guide bar and piston rod, the lead screw links to each other with the output shaft of motor, screw nut connects on the lead screw, the guide bar is fixed in the frame and parallels with the lead screw, the connecting plate is fixed mutually with screw nut and overlaps and locate outside the guide bar, and the motor can drive the connecting plate along lead screw and guide bar reciprocates, the piston rod is fixed in the connecting plate bottom and parallels with the lead screw, its characterized in that:

2. The single channel pipetting displacement module of claim 1, wherein: the single-channel pipetting variable-pitch module further comprises a circuit board, wherein the circuit board is fixed on one side of the rack, a first photoelectric switch is arranged on the circuit board, and a first induction block corresponding to the first photoelectric switch is fixed on one side of the connecting plate.

3. The single channel pipetting displacement module of claim 2, wherein: the circuit board is provided with a second photoelectric switch, and a second sensing block corresponding to the second photoelectric switch is fixed at the top end of the movable rod.

4. The single channel pipetting displacement module of claim 3, wherein: the circuit board is provided with a barometer, and one side of the cavity is provided with an air pipe for communicating with the barometer and the cavity inner cavity.

5. The single channel pipetting displacement module of claim 4, wherein: the circuit board is provided with a capacitor joint, the gun head fixing block is fixedly provided with a copper conductive piece, and the copper conductive piece is connected with the capacitor joint.

6. The single channel pipetting torque module of any one of claims 1-5 wherein: the gun head is arranged at one end, away from the cavity, of the gun head fixing block.