Semi-automatic pipettor for biological culture

Abstract

The utility model relates to the technical field of pipettors, and discloses a semi-automatic pipettor for biological culture, which comprises a pipettor body, one end of the pipettor body is provided with a connecting port, and the connecting port is provided with a clamping component for clamping a suction head; the clamping assembly comprises a mounting plate fixedly connected to the side wall of the connecting opening, a first rotating shaft is rotationally connected into the mounting plate, the first rotating shaft and the mounting plate are connected through a torsional spring, a first gear is fixedly connected to the side wall of the first rotating shaft, an extrusion plate used for clamping a suction head is fixedly connected to the first gear, and a second gear is fixedly connected to the extrusion plate. According to the scheme, when the pipettor is connected with the suction head, the clamping effect on the suction head is improved, and it is guaranteed that the suction head cannot fall off.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a semi-automatic pipette for biological culture. Background Technique

[0002] A pipette, also known as a pipetting gun, is a device used for quantitatively transferring liquids. The basic structure of a pipette mainly includes a display window, a volume adjustment component, a piston, an O-ring, a suction tube, and a tip (pipette tip), etc.

[0003] The working principle of a pipette is mainly based on the telescopic movement of the piston through a spring to achieve liquid suction and discharge. Due to the reduction of the internal space and the action of atmospheric pressure, the pipette will suck in liquid from the external liquid through the suction tube (pipette) and the tip (pipette tip) until the predetermined pipetting volume is reached. When liquid needs to be discharged, the piston will move again, pushing the internal air (which has been mixed with the liquid) through the suction tube and the tip to discharge the liquid.

[0004] The use of a pipette usually requires connection with a tip of a specified volume. The tip is usually made of a silicone material. The common connection method is to directly insert one end of the pipette into the tip through the silicone. Through the ductility of the silicone, the tip is installed at one end of the pipette. However, this connection method may cause the problem of the tip falling off due to insufficient tight connection; therefore, it does not meet the existing requirements, and for this reason, we propose a semi-automatic pipette for biological culture. Content of the Utility Model

[0005] The utility model provides a semi-automatic pipette for biological culture, which has the beneficial effect of improving the clamping effect on the tip when the pipette is connected to the tip to ensure that the tip will not fall off, and solves the problem that the common pipette connection port and the tip may have the problem of the tip falling off when using the plug-in connection method mentioned in the above background technique.

[0006] The utility model provides the following technical solution: a semi-automatic pipette for biological culture, including a pipette body, one end of the pipette body is provided with a connection port, and a clamping component for clamping the tip is arranged on the connection port.

[0007] The clamping component includes a mounting plate fixedly connected to the side wall of the connection port. A first rotating shaft is rotatably connected in the mounting plate. The first rotating shaft and the mounting plate are connected by a torsion spring. A first gear is fixedly connected to the side wall of the first rotating shaft, and a pressing plate for clamping the tip is fixedly connected to the first gear.

[0008] As an optional solution of the semi-automatic pipette for biological culture described in the utility model, wherein: a handle is fixedly connected to the side wall of the first gear, and a transmission component is arranged on one side of the first gear.

[0009] As an alternative solution for a semi-automatic pipette for biological culture according to the present utility model, wherein: a plugging assembly is provided at the bottom of the connection port, the plugging assembly includes a fixing plate fixedly connected to the bottom of the connection port, a second rotating shaft is rotatably connected inside the fixing plate, a second gear is fixedly connected to the side wall of the second rotating shaft, and a plugging plate for plugging the connection port is fixedly connected to the side wall of the second gear.

[0010] As an alternative solution for a semi-automatic pipette for biological culture according to the present utility model, wherein: the second gear is arranged in a rotating groove, and the rotating groove is opened inside the connection port.

[0011] As an alternative solution for a semi-automatic pipette for biological culture according to the present utility model, wherein: the transmission assembly includes a long groove and a circular groove opened inside the connection port, the long groove is communicated with the circular groove, and the circular groove is communicated with the rotating groove.

[0012] As an alternative solution for a semi-automatic pipette for biological culture according to the present utility model, wherein: a first toothed rod is slidably connected inside the long groove, a first gear is meshed and connected to one side of the first toothed rod, and a telescopic assembly is connected to the other end of the first toothed rod.

[0013] As an alternative solution for a semi-automatic pipette for biological culture according to the present utility model, wherein: the telescopic assembly includes a telescopic inner rod fixedly connected to one end inside the first toothed rod, the telescopic inner rod is slidably connected inside a telescopic outer shell, a connecting plate is fixedly connected to the side wall of the telescopic inner rod, a telescopic spring is fixedly connected to one side of the connecting plate, and the other end of the telescopic spring is fixedly connected inside the telescopic outer shell.

[0014] As an alternative solution for a semi-automatic pipette for biological culture according to the present utility model, wherein: one end of the telescopic outer shell is connected to a second toothed rod, the second toothed rod is meshed and connected to a third gear, the third gear is arranged inside the circular groove, and the third gear is meshed and connected to the second gear.

[0015] The present utility model has the following beneficial effects:

[0016] 1. When the semi-automatic pipette for biological culture connects the connection port with the pipette tip, first lift the handle to drive the rotation of the first rotating shaft, causing the pressing plate that abuts against the end of the connection port to rotate around the first rotating shaft. At this time, insert the connection port into the pipette tip, then release the drive of the handle. At this time, through the torsion spring on the first rotating shaft, the first rotating shaft can be driven to reset, and the pressing plate resets. Since the end of the connection port is connected with the pipette tip at this time, the pressing plate will press the side wall of the pipette tip. Through this design, the pipette tip can be firmly fixed at the end of the connection port, effectively avoiding the problem that the pipette tip falls off due to non-standard installation.

[0017] 2. The semi-automatic pipette for biological culture is designed with a plugging component to ensure the closure of the connection port when the pipette is not in use. When the pipette needs to be used, when lifting the handle, through the transmission of the first gear, the first rack, the telescopic component, the second rack, the third gear and the second gear, the plugging plate can be driven to rotate, opening the connection port, and connecting the pipette tip at this time. Since the pipette tip is usually conical, when installing the pipette tip, the plugging plate can be stuck to ensure the dredging of the connection port and ensure the normal progress of the liquid suction and liquid discharge operations. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present utility model.

[0019] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model.

[0020] Figure 3 It is of the present utility model Figure 1 The enlarged structural diagram at A in it.

[0021] Figure 4 It is of the present utility model Figure 2 The enlarged structural diagram at B in it.

[0022] Figure 5 It is a schematic structural diagram of the connection part between the mounting plate and the first rotating shaft of the present utility model.

[0023] Figure 6 It is a schematic structural diagram of the telescopic component of the present utility model.

[0024] Figure 7 It is a schematic structural diagram of the change of the plugging plate of the present utility model.

[0025] In the figure: 1. Pipette body; 2. Connection port; 3. Clamping component; 301. Mounting plate; 302. First rotating shaft; 303. Torsion spring; 304. Handle; 305. Extrusion plate; 306. First gear; 4. Sealing component; 401. Fixed plate; 402. Second rotating shaft; 403. Second gear; 404. Sealing plate; 405. Rotating groove; 5. Transmission component; 501. Long groove; 502. Circular groove; 503. First toothed rod; 504. Telescopic component; 5041. Telescopic housing; 5042. Telescopic inner rod; 5043. Telescopic spring; 5044. Connection plate; 505. Second toothed rod; 506. Third gear; 6. Pipette tip. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment. The purpose of this embodiment is to facilitate the solution of the problem that the pipette tip may fall off when the connection port of the common pipette and the pipette tip adopt a plug-in connection method. Please refer to Figures 1-7 A semi-automatic pipette for biological culture includes a pipette body 1. One end of the pipette body 1 is provided with a connection port 2, and a clamping component 3 for clamping the pipette tip 6 is arranged on the connection port 2.

[0028] The clamping component 3 includes a mounting plate 301 fixedly connected to the side wall of the connection port 2. A first rotating shaft 302 is rotatably connected inside the mounting plate 301. The first rotating shaft 302 and the mounting plate 301 are connected by a torsion spring 303. A first gear 306 is fixedly connected to the side wall of the first rotating shaft 302, and an extrusion plate 305 for clamping the pipette tip 6 is fixedly connected to the first gear 306.

[0029] A handle 304 is fixedly connected to the side wall of the first gear 306, and a transmission component 5 is arranged on one side of the first gear 306.

[0030] The connection port 2 forms a complete pipette by connecting with the pipette tip 6. (How the pipette aspirates and releases liquid is prior art, and this solution will not describe it in detail). When the connection port 2 is connected to the pipette tip 6, first lift the handle 304 to drive the first rotating shaft 302 to rotate, so that the pressing plate 305 that abuts against the end of the connection port 2 rotates around the first rotating shaft 302. At this time, insert the connection port 2 into the pipette tip 6. Then release the drive of the handle 304. At this time, through the torsion spring 303 on the first rotating shaft 302, the first rotating shaft 302 can be driven to reset, and at this time the pressing plate 305 resets. Since the pipette tip 6 is connected to the end of the connection port 2 at this time, the pressing plate 305 will press the side wall of the pipette tip 6. Through this design, the pipette tip 6 can be firmly fixed at the end of the connection port 2, effectively avoiding the problem that the pipette tip 6 falls off due to improper installation.

[0031] A sealing component 4 is arranged at the bottom of the connection port 2. The sealing component 4 includes a fixing plate 401 fixedly connected to the bottom of the connection port 2. A second rotating shaft 402 is rotatably connected inside the fixing plate 401. A second gear 403 is fixedly connected to the side wall of the second rotating shaft 402. A sealing plate 404 for sealing the connection port 2 is fixedly connected to the side wall of the second gear 403.

[0032] The second gear 403 is arranged in a rotating groove 405, and the rotating groove 405 is opened in the connection port 2.

[0033] The transmission component 5 includes a long groove 501 and a circular groove 502 opened in the connection port 2. The long groove 501 communicates with the circular groove 502, and the circular groove 502 communicates with the rotating groove 405.

[0034] A first toothed rod 503 is slidably connected in the long groove 501. One side of the first toothed rod 503 is meshed with a first gear 306. The other end of the first toothed rod 503 is connected with a telescopic component 504.

[0035] The telescopic component 504 includes a telescopic inner rod 5042 fixedly connected to one end of the first toothed rod 503. The telescopic inner rod 5042 is slidably connected in a telescopic outer shell 5041. A connecting plate 5044 is fixedly connected to the side wall of the telescopic inner rod 5042. One side of the connecting plate 5044 is fixedly connected with a telescopic spring 5043. The other end of the telescopic spring 5043 is fixedly connected inside the telescopic outer shell 5041.

[0036] One end of the telescopic outer shell 5041 is connected with a second toothed rod 505. The second toothed rod 505 is meshed with a third gear 506. The third gear 506 is arranged in the circular groove 502. The third gear 506 is meshed with the second gear 403.

[0037] When the pipette is not in use, it is usually placed directly on the mounting bracket. At this time, there is no seal on the connection port 2. Impurities may enter the connection port 2 over a long period of time, and these impurities may cause the sucked liquid to be contaminated. Therefore, the sealing component 4 is designed to ensure that the connection port 2 is closed when the pipette is not in use.

[0038] When the pipette is not in use, the blocking plate 404 at the bottom of the connection port 2 closes the entrance of the connection port 2. When the pipette is needed, the blocking plate 404 can be opened by driving the No. 1 rotating shaft 302 to rotate. When the No. 1 rotating shaft 302 rotates, the No. 1 gear 306 rotates synchronously, and at the same time drives the No. 1 gear rod 503 meshing with it to slide downward in the long groove 501. The No. 1 gear rod 503 drives the No. 2 gear rod 505 to mesh with the No. 3 gear 506 through the connection of the telescopic component 504, and drives the No. 3 gear 506 rotates, and due to the meshing of the third gear 506 and the second gear 403, the second gear 403 will rotate synchronously, thereby driving the sealing plate 404 installed on the side wall of the second gear 403 to rotate, thereby opening the connecting port 2. At this time, the connecting port 2 is connected to the suction head 6. The common suction head 6 is conical. At this time, the rotating groove 405 can be stuck by installing the suction head 6. At this time, the rotating groove 405 cannot rotate. Through this design, the flow of the connecting port 2 can be guaranteed, and the normal operation of the suction and discharge operations can be guaranteed.

[0039] Since the blocking plate 404 cannot rotate at this time, in order to ensure that the squeezing plate 305 squeezes the suction head 6 normally, through the design of the telescopic component 504, it is possible to drive the squeezing plate 305 to squeeze and fix the suction head 6 while ensuring that the rotating groove 405 is opened.

[0040] After the suction head 6 is installed, the torsion spring 303 will drive the No. 1 rotating shaft 302 to reset, so that the squeezing plate 305 squeezes and fixes the suction head 6. At this time, the No. 1 gear 306 will drive the No. 1 gear rod 503 to slide upward. At this time, since the blocking plate 404 is stuck and cannot rotate, the No. 2 gear 403, the No. 2 gear rod 505 and the telescopic shell 5041 connected to the blocking plate 404 cannot be reset either. The No. 1 gear rod 503 is connected to the telescopic inner rod 5042, and the telescopic inner rod 5042 slides in the telescopic shell 5041, which can ensure that the No. 1 gear rod 503 and the No. 1 gear 306 will not be unable to move due to the blocking plate 404 being stuck. Through the telescopic assembly 504 with such a telescopic design, it is possible to drive the squeezing plate 305 to squeeze and fix the suction head 6 while ensuring that the rotating slot 405 is opened, thereby effectively avoiding the problem that the squeezing plate 305 cannot fix the suction head 6 due to the blocking plate 404 being stuck. The design of the telescopic spring 5043 provides power for resetting the telescopic outer shell 5041 and the telescopic inner rod 5042.

[0041] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0042] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A semi-automatic pipette for biological culture, comprising a pipette body (1), characterized in that: One end of the pipette body (1) is provided with a connection port (2), and a clamping assembly (3) for clamping a pipette tip (6) is provided on the connection port (2); The clamping assembly (3) comprises a mounting plate (301) fixedly connected to the side wall of the connecting port (2); a first rotating shaft (302) is rotatably connected inside the mounting plate (301); a torsion spring (303) is used to connect the first rotating shaft (302) and the mounting plate (301); a first gear (306) is fixedly connected to the side wall of the first rotating shaft (302); and a pressing plate (305) for clamping the suction head (6) is fixedly connected to the first gear (306).

2. A semi-automatic pipette for biological culture according to claim 1, characterized in that: A handle (304) is fixedly connected to the side wall of the first gear (306), and a transmission assembly (5) is provided on one side of the first gear (306).

3. A semi-automatic pipette for biological culture according to claim 2, characterized in that: A blocking component (4) is provided at the bottom of the connection port (2), and the blocking component (4) comprises a fixing plate (401) fixedly connected to the bottom of the connection port (2), a second rotating shaft (402) being rotatably connected inside the fixing plate (401), a second gear (403) being fixedly connected to the side wall of the second rotating shaft (402), and a blocking plate (404) for blocking the connection port (2) being fixedly connected to the side wall of the second gear (403).

4. A semi-automatic pipette for biological culture according to claim 3, characterized in that: The second gear (403) is disposed in a rotation groove (405), and the rotation groove (405) is opened in the connection port (2).

5. A semi-automatic pipette for biological culture according to claim 4, characterized in that: The transmission assembly (5) comprises a long groove (501) and a circular groove (502) provided in the connection port (2); the long groove (501) is in communication with the circular groove (502); and the circular groove (502) is in communication with the rotating groove (405).

6. A semi-automatic pipette for biological culture according to claim 5, characterized in that: A first gear rod (503) is slidably connected in the long slot (501), one side of the first gear rod (503) is meshingly connected with the first gear (306), and the other end of the first gear rod (503) is connected with a telescopic assembly (504).

7. A semi-automatic pipette for biological culture according to claim 6, characterized in that: The telescopic assembly (504) includes a telescopic inner rod (5042) fixedly connected to one end of the first gear rod (503), the telescopic inner rod (5042) is slidably connected in the telescopic outer shell (5041), the side wall of the telescopic inner rod (5042) is fixedly connected to a connecting plate (5044), one side of the connecting plate (5044) is fixedly connected to a telescopic spring (5043), and the other end of the telescopic spring (5043) is fixedly connected to the telescopic outer shell (5041).

8. A semi-automatic pipette for biological culture according to claim 7, characterized in that: One end of the telescopic housing (5041) is connected to a second gear rod (505), the second gear rod (505) is meshedly connected to a third gear (506), the third gear (506) is arranged in the circular groove (502), and the third gear (506) is meshedly connected to the second gear (403).

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