Pipetting device

Abstract

The embodiment of the utility model relates to the technical field of medical treatment, in particular to a pipetting device which comprises a piston cylinder body, a shell, a control assembly and a conductive part. The piston cylinder body is connected with the shell, and one end, far away from the shell, of the piston cylinder body is used for mounting the conductive pipetting head; the shell is provided with a containing cavity, an electric connection channel and a piston channel, the two ends of the electric connection channel communicate with the containing cavity and the piston channel correspondingly, and the two ends of the piston channel communicate with the containing cavity and the piston cylinder correspondingly. The control assembly is arranged in the accommodating cavity; the conductive piece is arranged in the electric connection channel, and the two ends of the conductive piece are electrically connected with the control assembly and the piston cylinder body correspondingly. According to the technical scheme provided by the invention, the use reliability of the pipetting device can be improved.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to a liquid transfer device. Background Art

[0002] At present, in the capacitive liquid level detection system of the pipette device, the conductive pipette head installed on the piston cylinder contacts the solution to be sampled, generates an electrical signal, and transmits it to the control device inside the pipette, thereby judging whether the conductive pipette head has reached the liquid level of the solution to be sampled. However, the existing method generally uses an external wire to electrically connect the piston cylinder to the control component inside the pipette device, resulting in the wire being exposed outside the pipette device, which poses a problem of safety in use. Alternatively, the wire connected to the piston cylinder is passed through the piston channel and enters the interior of the pipette device, and then electrically connected to the control component, which easily affects the movement of the piston channel and the piston rod in the piston cylinder, thereby resulting in low reliability in the use of the existing pipette device. Utility Model Content

[0003] Based on this, an embodiment of the present application provides a pipetting device for solving the problem of low reliability in use of the pipetting device.

[0004] In order to solve the above technical problems, the present application provides a liquid transfer device, which adopts the following technical solution:

[0005] A liquid transfer device comprises a piston cylinder, a housing, a control component and a conductive member;

[0006] The piston cylinder is connected to the housing, and one end of the piston cylinder away from the housing is used for mounting a conductive liquid transfer head;

[0007] The housing is provided with a receiving chamber, an electrical connection channel and a piston channel, two ends of the electrical connection channel are respectively connected with the receiving chamber and the piston channel, and two ends of the piston channel are respectively connected with the receiving chamber and the piston cylinder;

[0008] The control component is disposed in the accommodating cavity;

[0009] The conductive member is arranged in the electrical connection channel, and two ends of the conductive member are respectively electrically connected to the control component and one end of the piston cylinder body close to the shell.

[0010] Furthermore, one end of the piston cylinder body close to the housing is installed in the piston channel.

[0011] Furthermore, a sleeve hole is formed at one end of the conductive member close to the piston channel;

[0012] The sleeve hole is sleeved on one end of the piston cylinder body located at the piston channel.

[0013] Furthermore, a notch is formed at one end of the conductive member close to the piston passage, and the notch is communicated with the sleeve hole.

[0014] Furthermore, a limiting portion is provided at one end of the piston cylinder body close to the housing; the limiting portion is used to cooperate with a side of the housing close to the piston cylinder body to limit the position of the piston cylinder body at one end of the piston channel;

[0015] And / or, the pipetting device further comprises a first insulating seal; one end of the piston cylinder body located at the piston channel is sealedly connected to the piston channel via the first insulating seal.

[0016] Furthermore, the electrical connection channel includes a transverse section and a longitudinal section that are connected;

[0017] One end of the transverse section away from the longitudinal section is connected to the piston channel;

[0018] One end of the longitudinal section away from the transverse section is in communication with the accommodating cavity;

[0019] The conductive member is arranged in the transverse section, and one end of the conductive member extends into the longitudinal section, and the other end of the conductive member extends into the piston channel.

[0020] Furthermore, a wiring hole is formed at one end of the conductive member close to the accommodating cavity.

[0021] Further, the housing comprises a main housing and an insulating housing connected to each other;

[0022] The accommodating cavity is formed in the main housing;

[0023] The electrical connection passage and the piston passage are formed in the insulating housing.

[0024] Furthermore, the pipetting device further comprises a piston rod, and the piston rod is movable in the piston channel and the piston cylinder;

[0025] And / or, the pipetting device further comprises an unloading cylinder, which is slidably sleeved on the piston cylinder and is used for unloading the conductive pipetting head mounted on the piston cylinder.

[0026] Furthermore, the piston rod is an insulating piston rod;

[0027] And / or, the pipetting device further comprises a second insulating seal; the second insulating seal is disposed in the piston channel, and the piston rod is sealingly connected to the piston channel via the second insulating seal.

[0028] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects: an electrical connection channel is provided on the side of the shell close to the piston cylinder, and the control component is electrically connected to the piston cylinder through a conductive member provided in the electrical connection channel, thereby forming an electrical signal transmission path; in this way, since the functions of the electrical connection channel and the piston channel are independent of each other, the electrical connection channel forms a safe and isolated electrical signal transmission channel, which can ensure the stability of electrical signal transmission, reduce signal interference, and improve the reliability of the use of the pipetting device in the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of a liquid transfer device according to an embodiment of the present application;

[0031] Figure 2 is a schematic diagram of a three-dimensional partial cross-section structure of a liquid transfer device according to an embodiment of the present application;

[0032] Figure 3 is a schematic diagram of the three-dimensional structure of the pipetting device according to an embodiment of the present application after the unloading cylinder and the conductive pipetting head are hidden;

[0033] Figure 4 is a schematic diagram of the three-dimensional structure of a housing and a conductive member in a liquid transfer device according to an embodiment of the present application;

[0034] Figure 5 is a schematic diagram of the three-dimensional structure of a housing in a liquid transfer device according to an embodiment of the present application;

[0035] Figure 6 is a schematic diagram of the three-dimensional structure of a conductive member in a liquid transfer device according to an embodiment of the present application;

[0036] Reference numerals:

[0037] 100, piston cylinder; 110, limiting part; 120, mounting part; 200, shell; 210, accommodating chamber; 220, electrical connection channel; 221, transverse section; 222, longitudinal section; 230, piston channel; 240, main shell; 250, insulating shell; 300, conductive part; 310, sleeve hole; 320, notch; 330, wiring hole; 400, first insulating seal; 500, piston rod; 600, unloading cylinder; 700, second insulating seal; 800, conductive pipette head. DETAILED DESCRIPTION

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0041] See also Figures 1 to 5 An embodiment of the present application provides a liquid transfer device, which is used to absorb liquid from an original container and also to transfer the absorbed liquid to another container.

[0042] The pipetting device includes a piston cylinder 100, a housing 200, a control assembly (not shown) and a conductive member 300; the piston cylinder 100 is connected to the housing 200, and the end of the piston cylinder 100 away from the housing 200 is a mounting portion 120, and the mounting portion 120 is used to mount a conductive pipetting head 800; the housing 200 is provided with a receiving chamber 210, an electrical connection channel 220 and a piston channel 230, and the two ends of the electrical connection channel 220 are respectively connected to the receiving chamber 210 and the piston channel 230, and the two ends of the piston channel 230 are respectively connected to the receiving chamber 210 and the piston cylinder 100; the control assembly (not shown) is disposed in the receiving chamber 210; the conductive member 300 is disposed in the electrical connection channel 220, and the two ends of the conductive member 300 are respectively electrically connected to the control assembly (not shown) and the end of the piston cylinder 100 close to the housing 200.

[0043] It can be understood that by setting an electrical connection channel 220 on a side of the shell 200 close to the piston cylinder 100, and electrically connecting the control component (not shown) to the piston cylinder 100 through the conductive member 300 set in the electrical connection channel 220, an electrical signal transmission path is formed; in this way, since the functions of the electrical connection channel 220 and the piston channel 230 are independent of each other, the electrical connection channel 220 forms a safe and isolated electrical signal transmission channel, which can ensure the stability of electrical signal transmission, reduce signal interference, and improve the reliability of the use of the pipetting device in the present application, and avoid the influence of the movement of the piston rod in the piston channel 230 and the piston cylinder 100 in actual applications, thereby ensuring the smoothness of the movement of the piston rod in the piston channel 230 and the piston cylinder 100.

[0044] Furthermore, the above-mentioned accommodating chamber 210 is located on the side of the shell 200 away from the piston cylinder 100, and the electrical connection channel 220 and the piston channel 230 are located on the side of the shell 200 close to the piston cylinder 100, so as to facilitate the electrical connection between the conductive part 300 in the electrical connection channel 220 and the piston cylinder 100, and the communication between the piston cylinder 100 and the piston channel 230, and the accommodating chamber 210 can occupy more space in the shell 200, thereby rationally utilizing the space of the shell 200.

[0045] Furthermore, the above-mentioned control component (not shown) may include a processor in some embodiments, which processor includes but is not limited to at least one of a central processing unit (CPU), a controller, a microcontroller, a microprocessor, or other data processing chips, for processing the electrical signal transmitted by the conductive member.

[0046] Furthermore, in some embodiments, the conductive member 300 may be a conductive sheet or a conductive block, and the material of the conductive member includes but is not limited to at least one of metal, alloy, carbon material, and conductive polymer.

[0047] In some embodiments, see Figures 1 to 5 , one end of the piston cylinder 100 close to the housing 200 is installed in the piston channel 230. In this way, the conductive member 300 forms a stable electrical connection with the piston cylinder 100 located at the piston channel 230, so as to reduce the interference of external signals and improve the working efficiency and stability of the liquid transfer device.

[0048] In some embodiments, see Figures 1 to 6 A sleeve hole 310 is formed at one end of the conductive member 300 close to the piston passage 230 ; the sleeve hole 310 is sleeved on one end of the piston cylinder body 100 located at the piston passage 230 .

[0049] It can be understood that the sleeve hole 310 on the conductive part 300 is sleeved on one end of the piston cylinder 100 located at the piston channel 230. On the one hand, it increases the contact area between the conductive part 300 and the piston cylinder 100, and improves the tight and stable connection between the two, thereby ensuring the stability of the electrical signal transmission between the two; on the other hand, it can simplify the assembly process between the conductive part 300 and the piston cylinder 100 and improve the assembly efficiency.

[0050] In some embodiments, see Figures 1 to 6 The end of the conductive member 300 close to the piston passage 230 is also provided with a notch 320, and the notch 320 is communicated with the sleeve hole 310. Thus, the notch 320 is provided so that the end of the conductive member 300 close to the piston passage 230 has a certain deformation ability, so as to provide a certain flexibility for the connection between the conductive member 300 and the piston cylinder 100, allowing a certain error tolerance during assembly, which is helpful to further improve the assembly efficiency and improve the stability of the connection between the two.

[0051] In some embodiments, see Figures 1 to 5 A limiting portion 110 is provided at one end of the piston cylinder 100 close to the housing 200; the limiting portion 110 is used to cooperate with a side of the housing 200 close to the piston cylinder 100 to limit the position of the piston cylinder 100 at one end of the piston channel 230, so as to effectively ensure the accuracy of the installation position of the piston cylinder 100 and avoid position deviation or unstable installation due to improper installation.

[0052] In one example, the above-mentioned limiting portion 110 is a limiting protrusion installed on the piston cylinder body 100, and the side of the shell 200 close to the piston cylinder body 100 is used as a resistance surface. When the limiting protrusion abuts against the resistance surface, the position of the piston cylinder body 100 at one end of the piston channel 230 is limited.

[0053] In some embodiments, see Figures 1 to 5 The liquid transfer device further includes a first insulating seal 400; the end of the piston cylinder 100 located at the piston channel 230 is sealed and connected to the piston channel 230 through the first insulating seal 400. In this way, on the one hand, the first insulating seal 400 is used to seal the connection between the piston channel 230 and the piston cylinder 100 to prevent the entry of external water vapor and impurities; on the other hand, the first insulating seal 400 is set as an insulation to avoid interference with the electrical signal transmission path formed by the conductive member 300 and the piston cylinder 100, thereby improving the detection accuracy of the liquid transfer device.

[0054] In one example, the first insulating seal 400 is a sealing rubber ring, which can not only achieve the technical effect of the first insulating seal 400 as above, but also because the sealing rubber ring has a certain elastic deformation ability, it can fully fill the gap between the piston cylinder 100 and the piston channel 230, thereby further improving the sealing connection stability between the two.

[0055] In some embodiments, see Figures 1 to 5 The electrical connection channel 220 includes a connected transverse section 221 and a longitudinal section 222; one end of the transverse section 221 away from the longitudinal section 222 is connected to the piston channel 230; one end of the longitudinal section 222 away from the transverse section 221 is connected to the accommodating chamber 210; the conductive member 300 is arranged in the transverse section 221, and one end of the conductive member 300 extends into the longitudinal section 222, and the other end of the conductive member 300 extends into the piston channel 230. In this way, the longitudinal section 222 and the piston channel 230 are spaced apart by the transverse section 221, and both the longitudinal section 222 and the piston channel 230 are connected to the accommodating chamber 210, so that the functions of the longitudinal section 222 and the piston channel 230 are independent of each other, ensuring the stability of electrical signal transmission and reducing signal interference. In addition, the transverse section 221 and the longitudinal section 222 are provided for the arrangement of the conductive part 300, so that the conductive part 300 is hidden in the shell 200 to avoid exposure of the conductive part 300, thereby improving the stability and safety of the conductive part 300.

[0056] In some embodiments, see Figures 1 to 6 A wiring hole 330 is formed at one end of the conductive member 300 close to the accommodating cavity 210, and the wiring hole 330 is used to provide a connection position for the wire to ensure the stability of the connection between the control component (not shown) and the end of the conductive member 300 close to the accommodating cavity 210 through the wire.

[0057] In some embodiments, see Figures 1 to 5 The housing 200 includes a main housing 240 and an insulating housing 250 connected to each other; the accommodating cavity 210 is formed in the main housing 240; the electrical connection channel 220 and the piston channel 230 are formed in the insulating housing 250. Thus, by providing the insulating housing 250, interference with the electrical signal transmission path formed by the conductive member 300 and the piston cylinder 100 is avoided, thereby improving the detection accuracy of the liquid transfer device.

[0058] In some embodiments, see Figures 1 to 5 The pipetting device further comprises a piston rod 500 , and the piston rod 500 is movable within the piston channel 230 and the piston cylinder 100 .

[0059] Preferably, the piston rod 500 is an insulating piston rod, so that the piston rod 500 is insulated from the piston channel 230 and the piston cylinder 100 respectively, so as to avoid interference with the electrical signal transmission path formed by the conductive part 300 and the piston cylinder 100, thereby improving the detection accuracy of the pipetting device.

[0060] In some embodiments, see Figures 1 to 5 The pipetting device further comprises an unloading cylinder 600, which is slidably sleeved on the piston cylinder 100 and is used to unload the conductive pipetting head 800 installed on the piston cylinder 100. It can be understood that a driving structure for driving the unloading cylinder 600 to move is provided in the pipetting device. Under the drive of the driving structure, the unloading cylinder 600 can move along the length direction of the piston cylinder 100, so as to unload the conductive pipetting head installed on the piston cylinder when moving close to the end of the piston cylinder away from the housing 200, and when moving away from the end of the piston cylinder away from the housing 200, the end of the piston cylinder away from the housing 200 is exposed to the outside for the installation of the conductive pipetting head 800.

[0061] Preferably, the unloading cylinder 600 is an insulating unloading cylinder, so that the unloading cylinder 600 and the piston cylinder 100 are insulated to avoid interference with the electrical signal transmission path formed by the conductive member 300 and the piston cylinder 100, thereby improving the detection accuracy of the pipetting device.

[0062] Preferably, the above-mentioned driving structure includes but is not limited to a driving motor, a driving cylinder or a driving hydraulic cylinder, etc., which is not specifically limited here.

[0063] Preferably, the driving structure is a driving motor, which can be connected to the unloading cylinder 600 via a transmission structure such as a screw transmission, a gear transmission, etc., to drive the unloading cylinder 600 to move.

[0064] In some embodiments, see Figures 1 to 5 The liquid transfer device further includes a second insulating seal 700; the second insulating seal 700 is disposed in the piston channel 230, and the piston rod 500 is sealed and connected to the piston channel 230 through the second insulating seal 700. Thus, on the one hand, the second insulating seal 700 is used to seal the connection between the piston channel 230 and the piston rod 500 to prevent the entry of moisture and impurities from the outside; on the other hand, the second piston rod 500 is insulated to avoid interference with the electrical signal transmission path formed by the conductive member 300 and the piston cylinder 100, thereby improving the detection accuracy of the liquid transfer device.

[0065] In one example, the second insulating seal 700 is a pan-plug seal, which can not only achieve the technical effect of the second insulating seal 700 as above, but also because the pan-plug seal has a certain elastic deformation ability, it can fully fill the gap between the second insulating seal 700 and the piston channel 230, thereby further improving the sealing connection stability between the two.

[0066] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A liquid transfer device, characterized in that: It includes a piston cylinder, a housing, a control assembly and a conductive part; The piston cylinder is connected to the housing, and one end of the piston cylinder away from the housing is used for mounting a conductive liquid transfer head; The housing is provided with a receiving chamber, an electrical connection channel and a piston channel, two ends of the electrical connection channel are respectively connected with the receiving chamber and the piston channel, and two ends of the piston channel are respectively connected with the receiving chamber and the piston cylinder; The control component is disposed in the accommodating cavity; The conductive member is arranged in the electrical connection channel, and two ends of the conductive member are electrically connected to the control component and the piston cylinder respectively.

2. The liquid transfer device according to claim 1, characterized in that: One end of the piston cylinder body close to the housing is installed in the piston channel.

3. The liquid transfer device according to claim 2, characterized in that: A sleeve hole is formed at one end of the conductive member close to the piston passage; The sleeve hole is sleeved on one end of the piston cylinder body located at the piston channel.

4. The liquid transfer device according to claim 3, characterized in that: A notch is also formed at one end of the conductive member close to the piston passage, and the notch is communicated with the sleeve hole.

5. The liquid transfer device according to claim 2, characterized in that: A limiting portion is provided at one end of the piston cylinder body close to the housing; the limiting portion is used to cooperate with a side of the housing close to the piston cylinder body to limit the position of the piston cylinder body at one end of the piston channel; And / or, the pipetting device further comprises a first insulating seal; one end of the piston cylinder body located at the piston channel is sealedly connected to the piston channel via the first insulating seal.

6. The liquid transfer device according to any one of claims 1 to 5, characterized in that: The electrical connection channel includes a transverse section and a longitudinal section that are connected; One end of the transverse section away from the longitudinal section is connected to the piston channel; One end of the longitudinal section away from the transverse section is in communication with the accommodating cavity; The conductive member is arranged in the transverse section, and one end of the conductive member extends into the longitudinal section, and the other end of the conductive member extends into the piston channel.

7. The liquid transfer device according to any one of claims 1 to 5, characterized in that: A wiring hole is formed at one end of the conductive member close to the accommodating cavity.

8. The liquid transfer device according to any one of claims 1 to 5, characterized in that: The housing comprises a main housing and an insulating housing connected to each other; The accommodating cavity is formed in the main housing; The electrical connection passage and the piston passage are formed in the insulating housing.

9. The liquid transfer device according to any one of claims 1 to 5, characterized in that: The pipetting device further comprises a piston rod, which is movable within the piston channel and the piston cylinder; And / or, the pipetting device further comprises an unloading cylinder, which is slidably sleeved on the piston cylinder and is used for unloading the conductive pipetting head mounted on the piston cylinder.

10. The liquid transfer device according to claim 9, characterized in that: The piston rod is an insulating piston rod; And / or, the pipetting device further comprises a second insulating seal; the second insulating seal is disposed in the piston channel, and the piston rod is sealingly connected to the piston channel via the second insulating seal.

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