Multi-channel pipettor

Abstract

The utility model relates to a multichannel pipettor which comprises a handle base body, a shell fixed at the end part of the handle base body and composed of a front shell and a rear shell, and pipetting piston cylinders arranged in the shell in an array manner, the end parts of the pipetting piston cylinders extend to the outside of the shell, an L-shaped bracket A is fixed at one side of the shell, an L-shaped bracket B is fixed at the other side of the shell, a suspension rod is fixed between the L-shaped bracket A and the L-shaped bracket B, and the suspension rod is connected with the L-shaped bracket A and the L-shaped bracket B; the suspension rod is sleeved with a plurality of annular bases, and the first annular base close to one side of the L-shaped support A is fixed to the suspension rod. The air distribution mechanism works to inflate the annular air bags, the annular air bags expand and extend in the length direction of the suspension rod and push the annular bases to slide, the distance between the annular air bags is increased, the air distribution mechanism works to deflate the annular air bags, the annular air bags reset and retract in the length direction of the suspension rod, and the annular bases can be driven to slide. And the distance is reduced, so that the distance adjustment of the suction heads is realized to adapt to containers with different hole distances, and the universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a multi-channel pipette. Background Art

[0002] Multichannel pipettes are commonly used in biological and clinical laboratories as precision instruments for accurately transferring liquids. They typically include a handle base, a pipette tip, and a suction tip, with a multi-channel piston-cylinder assembly housed within the pipette tip. Chinese invention patent application publication number CN118253360A discloses a multichannel pipette comprising a handle base, a pipette tip, and a suction tip. The pipette tip includes multiple channels and a multi-channel piston rod synchronous actuator connecting rod. The multiple channels are each equipped with a piston-cylinder assembly. The pipette tip also includes a buffer and a gun ejection push plate.

[0003] In the above-mentioned multi-channel pipette, the spacing between the pipette tips is fixed and cannot be adaptively adjusted, and thus cannot be adapted to containers with different hole spacings, resulting in low versatility. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-channel pipette with adjustable tip spacing, which effectively solves the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions.

[0006] The cam is secured to the side of the L-shaped support frame and has an L-shaped bottom edge, the cam being secured to the side of the L-shaped support frame and having two guide arms extending out of the cam.

[0007] It can be seen that the annular airbags are inflated by the operation of the air distribution mechanism, and the annular airbags expand and extend along the length direction of the suspension rod, pushing the annular seats to slide, and the spacing becomes larger. The annular airbags are deflated by the operation of the air distribution mechanism, and the annular airbags are reset and retracted along the length direction of the suspension rod, which can drive the annular seats to slide, and the spacing becomes smaller, thereby realizing the spacing adjustment of the suction head to adapt to containers with different hole spacings, and has high versatility.

[0008] Furthermore, the gas distribution mechanism includes a gas distribution device, a gas distribution and diversion pipe, several gas guide pipes and a second connecting pipe. The gas distribution device and the gas distribution and diversion pipe are installed on an L-shaped bracket B. One end of the second connecting pipe is connected to the gas distribution device, and the other end is connected to the gas distribution and diversion pipe. One end of each gas guide pipe is connected to each interface of the gas distribution and diversion pipe one by one, and the other end is connected to each annular airbag one by one. The gas distribution device is used to provide a gas source drive for inflation and deflation.

[0009] Furthermore, the gas distribution device includes a gas distribution piston cylinder, a guide rod and a piston body. The gas distribution piston cylinder is fixed on the L-shaped bracket B. The second connecting pipe is connected to the gas distribution piston cylinder. A guide hole is provided on the top of the gas distribution piston cylinder. The guide rod is installed in the guide hole. The piston body is matched and installed in the gas distribution piston cylinder, and the top is connected to the end of the guide rod extending into the gas distribution piston cylinder.

[0010] Furthermore, the guide hole is a threaded hole, and the guide rod is a threaded rod adapted to the threaded hole.

[0011] Furthermore, each first connecting pipe and each air guide pipe is made of a rubber hose.

[0012] Furthermore, a pinch handle is installed on the end portion of the guide rod located outside the gas distribution piston cylinder, and anti-slip grooves are arranged on the outer peripheral wall of the pinch handle.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0014] The utility model inflates each annular airbag through the operation of the air distribution mechanism, and each annular airbag expands and extends along the length direction of the suspension rod, pushing each annular seat to slide, and the spacing becomes larger. The air distribution mechanism deflates each annular airbag, and each annular airbag resets and retracts along the length direction of the suspension rod, which can drive each annular seat to slide, and the spacing becomes smaller, thereby realizing the spacing adjustment of the suction head to adapt to containers with different hole spacings, and has high versatility.

[0015] The utility model can evenly distribute and supply gas through the cooperation of the gas distribution diversion tube and each gas guide tube, ensuring that the inflation and deflation volumes in each annular airbag are consistent, so that the deformation of each annular airbag during inflation and deflation is the same, thereby ensuring that the distance adjustment between each adjacent suction head is synchronized, and improving the accuracy of alignment with the holes of the container.

[0016] The utility model adopts a threaded hole as a guide hole and a threaded rod as a guide rod. By screwing the guide rod, the piston body can be driven to move under the action of the thread. The cooperation of the threaded rod and the threaded hole has a self-locking effect. When not adjusting, the guide rod is prevented from rotating randomly and causing the piston body to slide randomly, which helps to maintain the inflation volume in the annular airbag, thereby ensuring the stability of the distance between the suction heads. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure on the suspension rod in the utility model;

[0019] Figure 3 Detailed structural diagram of the valve mechanism in the present utility model;

[0020] Figure 4 It is a detailed structural diagram of the gas distribution device in the utility model.

[0021] In the figure: 1. handle base; 2. shell; 201. pipette piston cylinder; 21. L-shaped bracket A; 22. L-shaped bracket B; 3. suspension rod; 31. annular seat; 32. annular airbag; 4. suction tip; 41. first connecting pipe; 5. gas distribution mechanism; 51. gas distribution device; 511. gas distribution piston cylinder; 512. guide hole; 513. guide rod; 514. piston body; 515. pinch handle; 52. gas distribution shunt pipe; 53. gas guide pipe; 54. second connecting pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1-4The utility model provides a multi-channel pipette, comprising a handle base 1, a shell body 2 composed of a front shell and a rear shell fixed at the end of the handle base body 1, and a pipette piston cylinder 201 arranged in an array in the shell body 2 and with the ends extending to the outside of the shell body 2. An L-shaped bracket A21 is fixed to one side of the shell body 2, and an L-shaped bracket B22 is fixed to the other side. A suspension rod 3 is fixed between the L-shaped bracket A21 and the L-shaped bracket B22. A plurality of annular seats 31 are mounted on the suspension rod 3. The first annular seat 31 near the side of the L-shaped bracket A21 is fixed to the suspension rod 3, and the remaining annular seats 31 are all limitedly slidably mounted on the suspension rod 3. A suction head 4 is fixed to the side of each annular seat 31, and each suction head 4 is respectively connected to the corresponding pipette piston cylinder 201 through a first connecting tube 41. Each annular seat 31 limitedly slidably mounted on the suspension rod 3 can only slide horizontally along the length direction of the suspension rod 3 and cannot rotate on the suspension rod 3, thereby preventing the suction head 4 from deflecting and dislocating.

[0024] Annular airbags 32 are respectively sleeved between adjacent annular seats 31 on the suspension rod 3, and the two ends of the annular airbags 32 are fixedly connected to the annular seats 31 on both sides. The inflation and expansion extension direction and the deflation and contraction and reset direction of each annular airbag 32 are parallel to the length direction of the suspension rod 3. An air distribution mechanism 5 for inflating and deflating each annular airbag 32 is provided on the L-shaped bracket B22. The annular airbags 32 are inflated by the air distribution mechanism 5, and each annular airbag 32 expands and extends along the length direction of the suspension rod 3, pushing each annular seat 31 to slide, and the spacing becomes larger. The annular airbags 32 are deflated by the air distribution mechanism 5, and each annular airbag 32 is reset and retracted along the length direction of the suspension rod 3, which can drive each annular seat 31 to slide, and the spacing becomes smaller, thereby realizing the spacing adjustment of the suction head 4 to adapt to containers with different hole spacings, and it has high versatility.

[0025] Specifically, the gas distribution mechanism 5 includes a gas distribution device 51, a gas distribution and diversion pipe 52, a plurality of gas guide pipes 53 and a second connecting pipe 54. The gas distribution device 51 and the gas distribution and diversion pipe 52 are installed on the L-shaped bracket B22. One end of the second connecting pipe 54 is connected to the gas distribution device 51, and the other end is connected to the gas distribution and diversion pipe 52. One end of each gas guide pipe 53 is connected to each interface of the gas distribution and diversion pipe 52 in a one-to-one correspondence, and the other end is connected to each annular airbag 32 in a one-to-one correspondence. The gas distribution device 51 is used to provide an air source drive for inflation and deflation. When the gas distribution device 51 works, the gas is transported to the gas distribution and diversion pipe 52 through the second connecting pipe 54, and then the air flow is diverted to each annular airbag 32 through each air guide pipe 53 to achieve inflation of each annular airbag 32. When the gas distribution device 51 works, the gas in each annular airbag 32 can be withdrawn in turn through the air guide pipe 53, the gas distribution and diversion pipe 52 and the second connecting pipe 54 to achieve deflation of each annular airbag 32.

[0026] The gas distribution and diversion tube 52 adopts existing technology, and the specific structure and working principle will not be described in detail. The gas distribution and diversion tube 52 can evenly distribute the gas to ensure that the inflation and deflation amounts in each annular airbag 32 are consistent, so that the deformation of each annular airbag 32 during inflation and deflation is the same, thereby ensuring that the spacing between each adjacent suction head 4 is adjusted synchronously, thereby improving the accuracy of alignment with the holes in the container.

[0027] Specifically, the gas distribution device 51 includes a gas distribution piston cylinder 511, a guide rod 513 and a piston body 514. The gas distribution piston cylinder 511 is fixed on the L-shaped bracket B22. The second connecting pipe 54 is communicated with the gas distribution piston cylinder 511. A guide hole 512 is provided on the top of the gas distribution piston cylinder 511. The guide rod 513 is installed in the guide hole 512. The piston body 514 is matched and installed in the gas distribution piston cylinder 511, and the top is connected to the end of the guide rod 513 extending into the gas distribution piston cylinder 511. By pushing the guide rod 513 to drive the piston body 514 to move toward the side of the second connecting pipe 54, the piston body 514 can press the gas into the second connecting pipe 54 to achieve the inflation effect. By pulling the guide rod 513 to drive the piston body 514 to move away from the second connecting pipe 54, the gas in the annular airbag 32 can be drawn back into the gas distribution piston cylinder 511 to achieve the deflation of each annular airbag 32.

[0028] Specifically, the guide hole 512 is a threaded hole, and the guide rod 513 is a threaded rod that is adapted to the threaded hole. The threaded hole is used as the guide hole 512, and the threaded rod is used as the guide rod 513. By screwing the guide rod 513, the piston body 514 can be driven to move under the action of the threaded cooperation. The cooperation between the threaded rod and the threaded hole has a self-locking effect. When not adjusting, the guide rod 513 is prevented from rotating arbitrarily and driving the piston body 514 to slide arbitrarily, which helps to maintain the inflation volume in the annular airbag 32, thereby ensuring the stability of the distance between the suction heads 4.

[0029] Specifically, each first connecting tube 41 and each air guide tube 53 is made of a rubber hose. Using a rubber hose as the first connecting tube 41 and the air guide tube 53 has the ability to bend and deform, which helps the first connecting tube 41 and the air guide tube 53 to undergo adaptive deformation when the spacing is adjusted.

[0030] Specifically, a pinch handle 515 is installed on the end of the guide rod 513 located outside the gas distribution piston cylinder 511. By pinching the pinch handle 515, it is convenient to exert force to screw the guide rod 513. The outer peripheral wall of the pinch handle 515 is arranged with anti-slip grooves.

[0031] It is worth noting that the other components of the multi-channel pipette provided in this application are consistent with those in the reference patent, and the specific structure, connection method and specific working principle of each component are consistent with those in the reference patent, which are prior art. Therefore, this application will no longer disclose them in detail.

[0032] The above is a detailed description of the present invention in conjunction with specific embodiments, and the specific implementation methods of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, if a number of equivalent substitutions or obvious modifications are made without departing from the concept of the present invention and the performance or use are the same, they should be considered to fall within the scope of patent protection of the present invention as determined by the submitted claims.

Claims

1. A multi-channel pipette, comprising a handle base (1), a housing (2) fixed to the end of the handle base (1) and consisting of a front housing and a rear housing, and pipetting piston cylinders (201) arranged in an array within the housing (2) and with their ends extending to the outside of the housing (2), characterized in that: An L-shaped bracket A (21) is fixed to one side of the housing (2), and an L-shaped bracket B (22) is fixed to the other side, and a suspension rod (3) is fixed between the L-shaped bracket A (21) and the L-shaped bracket B (22); The suspension rod (3) is provided with a plurality of annular seats (31), the first annular seat (31) close to the side of the L-shaped bracket A (21) is fixed to the suspension rod (3), and the remaining annular seats (31) are all limitedly slidably mounted on the suspension rod (3); A suction head (4) is fixed to the side of each annular seat (31), and each suction head (4) is connected to the corresponding pipetting piston cylinder (201) through a first connecting tube (41); Annular airbags (32) are respectively sleeved between adjacent annular seats (31) on the suspension rod (3), and both ends of the annular airbags (32) are fixedly connected to the annular seats (31) on both sides, and the inflation and extension direction and the deflation and contraction and reset direction of each annular airbag (32) are parallel to the length direction of the suspension rod (3); The L-shaped bracket B (22) is provided with an air distribution mechanism (5) for inflating and deflating each of the annular airbags (32).

2. A multi-channel pipette according to claim 1, characterized in that: The gas distribution mechanism (5) comprises a gas distribution device (51), a gas distribution and diversion pipe (52), a plurality of gas guide pipes (53) and a second connecting pipe (54); The gas distribution device (51) and the gas distribution and diversion pipe (52) are installed on the L-shaped bracket B (22); one end of the second connecting pipe (54) is connected to the gas distribution device (51), and the other end is connected to the gas distribution and diversion pipe (52); One end of each of the air guide tubes (53) is in one-to-one communication with each interface of the gas distribution and diversion tube (52), and the other end is in one-to-one communication with each of the annular air bags (32); The gas distribution device (51) is used to provide a gas source drive for inflation and deflation.

3. A multi-channel pipette according to claim 2, characterized in that: The gas distribution device (51) includes a gas distribution piston cylinder (511), a guide rod (513) and a piston body (514); The gas distribution piston cylinder (511) is fixed on the L-shaped bracket B (22), and the second connecting pipe (54) is connected to the gas distribution piston cylinder (511); A guide hole (512) is provided on the top of the gas distribution piston cylinder (511), and the guide rod (513) is installed through the guide hole (512); The piston body (514) is matched and installed in the gas distribution piston cylinder (511), and the top is connected to the end of the guide rod (513) extending into the gas distribution piston cylinder (511).

4. A multi-channel pipette according to claim 3, characterized in that: The guide hole (512) is a threaded hole, and the guide rod (513) is a threaded rod adapted to the threaded hole.

5. A multi-channel pipette according to claim 2, characterized in that: Each of the first connecting pipes (41) and each of the air guide pipes (53) is made of a rubber hose.

6. A multi-channel pipette according to claim 3, characterized in that: A pinch handle (515) is installed on the end of the guide rod (513) located outside the gas distribution piston cylinder (511), and anti-slip grooves are arranged on the outer peripheral wall of the pinch handle (515).

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