Self-aligning floating type pipette

Abstract

The utility model relates to a self-aligning floating type pipette, which comprises a shell, a pipette head and a driving mechanism, the driving mechanism comprises a motor, a screw rod, a sliding seat and a self-aligning floating type piston rod, the motor and a guide rail are respectively fixed in the shell, the motor is connected with the screw rod, the screw rod is parallel to the guide rail, the sliding seat is in threaded connection with the screw rod, and the self-aligning floating type piston rod is connected with the pipette head. One end of the sliding seat is in sliding connection with the guide rail, the other end of the sliding seat is fixed with the top end of the self-aligning floating type piston rod, and the bottom end of the self-aligning floating type piston rod is inserted into the inner cavity of the pipette head. The whole pipette is convenient to install and maintain, the self-aligning floating type piston rod structure ingeniously eliminates the situation that the piston rod is not parallel to the guide rail, it is guaranteed that the piston rod is in a free state in the linear motion process, therefore, sealing sleeve abrasion caused by eccentricity is eliminated, and the service life of the pipette is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instruments, in particular to a self-aligning floating liquid transfer gun. Background Art

[0002] Sampling and pipetting instruments are widely used in biochemical, molecular, and cellular biology experiments. Their purpose is to sample and transfer a certain volume of liquid. The pipetting mechanism is one of their core mechanisms, used to extract, transport, and transfer liquids within a standard container.

[0003] Existing pipettes are generally large in size, and the servo motor drives the piston rod to move up and down through the ball screw and screw nut. Since a guide mechanism needs to be designed when the screw nut and piston rod are raised and lowered, its internal structure is complicated. At the same time, since the positions of the piston rod and the guide mechanism are relatively fixed, if the piston rod is offset, it can easily cause difficulty in raising and lowering, wear the seals, and even cause it to get stuck. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a self-aligning floating pipette with a simple structure, convenient assembly, improved sealing performance and guaranteed service life.

[0005] The utility model is achieved through the following technical solutions:

[0006] A self-aligning floating liquid-transferring gun comprises a shell, a gun head arranged at one end of the shell, and a driving mechanism arranged in the shell and connected to the gun head, the driving mechanism comprising a motor, a screw rod, a slide and a self-aligning floating piston rod, the motor and the guide rail are respectively fixed in the shell, the motor is connected to the screw rod, the screw rod is parallel to the guide rail, the slide is threadedly connected to the screw rod, one end of the slide is slidably connected to the guide rail, and the other end is fixed to the top end of the self-aligning floating piston rod, the bottom end of the self-aligning floating piston rod is inserted into the inner cavity of the gun head, and the motor can drive the slide to rise and fall along the guide rail, thereby driving the self-aligning floating piston rod to move up and down, thereby realizing the suction or discharge of liquid by the gun head.

[0007] In order to facilitate the installation of the motor, a mounting support is fixed in the housing by screws, and the bottom end of the motor is detachably fixed to the mounting support.

[0008] In order to facilitate the self-aligning floating of the piston rod, in a preferred embodiment of the present invention, the self-aligning floating piston rod includes a piston rod body, a floating block, a positioning tube, a telescopic rod and a spring. The floating block is fixed on the piston rod body, the positioning tube is fixed to the bottom end of the shell, the positioning tube is parallel to the screw rod, the telescopic rod is fixed in the floating block, and the bottom end of the telescopic rod is inserted into the inner cavity of the positioning tube and is elastically connected to the positioning tube through a spring.

[0009] In order to facilitate the disassembly, assembly and maintenance of internal components, the housing includes a rectangular outer shell and a cover plate detachably covering the rectangular outer shell.

[0010] In order to facilitate observation of the working status of the pipette, an indicator light is provided on one side of the rectangular housing.

[0011] The beneficial effects of the present utility model are as follows: the self-aligning floating pipette simplifies the installation structure inside the shell through the specially designed self-aligning floating piston rod and drive mechanism, facilitates the installation and maintenance of the entire pipette, and the self-aligning floating piston rod structure cleverly eliminates the situation where the piston rod is not parallel to the guide rail, ensuring that the piston rod is in a free state during the linear motion process, thereby eliminating the wear of the sealing sleeve caused by eccentricity and increasing the service life of the pipette. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the three-dimensional structure of the self-aligning floating pipette of the present invention;

[0013] Figure 2 This is a schematic diagram of the internal structure of the self-aligning floating pipette of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of the floating block of the utility model. DETAILED DESCRIPTION

[0015] The following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the scope of protection of the present invention. The directional terms mentioned in the present invention, such as "up", "down",

[0016] The terms "front", "back", "left", "right", "top", "bottom", etc. are merely directions in reference to the accompanying drawings. Therefore, the directional terms used are for explaining and understanding the present invention, and are not intended to limit the present invention.

[0017] like Figure 1 The self-aligning floating pipette shown includes a shell, a gun head 3 arranged at the bottom end of the shell, and a driving mechanism arranged in the shell and connected to the gun head 3. The shell includes a rectangular thin-sheet shell 1 and a cover plate 2 that can be detachably covered on the rectangular thin-sheet shell 1. An indicator light 14 is provided on one side of the rectangular thin-sheet shell 1. In addition, a through hole is opened on the cover plate 2, and a motor 4 of the driving mechanism is installed in the through hole.

[0018] Specifically, combined Figure 2 、 Figure 3The driving mechanism shown includes a motor 4, a screw 5, a slide 8 and a self-aligning floating piston rod. A mounting support 6 is fixed in the housing by screws. The bottom end of the motor 4 is detachably fixed to the mounting support 6. The click 4 adopts a sunken installation method to save installation space and volume, increase the available space inside the gun, reduce the length of the cavity, and shorten the length of installation from the end face. The guide rail 7 is fixed in the housing. The output shaft of the motor 4 is connected to the screw 5. The screw 5 is parallel to the guide rail 7. The slide 8 is threaded with the screw 5. Connection, one end of the slide 8 is slidably connected to the guide rail 7, and the other end is fixed to the top of the self-aligning floating piston rod. The self-aligning floating piston rod includes a piston rod body 9, a floating block 10, a positioning tube 11, a telescopic rod 12 and a spring 13. The floating block 10 is fixed on the piston rod body 9, the positioning tube 11 is fixed to the bottom end of the shell, the positioning tube 11 is parallel to the screw rod 5, the telescopic rod 12 is fixed in the floating block 10, and the bottom end of the telescopic rod 12 is inserted into the inner cavity of the positioning tube 11 and is elastically connected to the positioning tube 11 through the spring 13.

[0019] During use, the motor 4 drives the screw rod 5 to rotate, and the screw rod 5 drives the slide 8 to rise and fall along the guide rail 7, thereby driving the self-aligning floating piston rod to move up and down, realizing the suction or discharge of liquid by the gun head 3. The self-aligning floating piston rod cleverly eliminates the situation where the piston rod body 9 is not parallel to the guide rail 7, ensuring that the piston rod body 9 is in a free state during the linear motion process, thereby eliminating the wear of the sealing sleeve caused by eccentricity.

[0020] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "set," and "provided with" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0021] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A self-aligning floating pipette, comprising a housing, a pipette head disposed at one end of the housing, and a drive mechanism disposed within the housing and connected to the pipette head, characterized in that: The driving mechanism includes a motor, a screw, a slide and a self-aligning floating piston rod. The motor and the guide rail are respectively fixed in the shell. The motor is connected to the screw, and the screw is parallel to the guide rail. The slide is threadedly connected to the screw. One end of the slide is slidably connected to the guide rail, and the other end is fixed to the top of the self-aligning floating piston rod. The bottom end of the self-aligning floating piston rod is inserted into the inner cavity of the gun head. The motor can drive the slide to rise and fall along the guide rail, thereby driving the self-aligning floating piston rod to move up and down, so as to realize the suction or discharge of liquid by the gun head.

2. The self-aligning floating pipette according to claim 1, characterized in that: A mounting support is fixed in the shell by screws, and the bottom end of the motor is detachably fixed on the mounting support.

3. The self-aligning floating pipette according to claim 1 or 2, characterized in that: The self-aligning floating piston rod includes a piston rod body, a floating block, a positioning tube, a telescopic rod and a spring. The floating block is fixed on the piston rod body, the positioning tube is fixed on the bottom end of the shell, the positioning tube is parallel to the screw rod, the telescopic rod is fixed in the floating block, and the bottom end of the telescopic rod is inserted into the inner cavity of the positioning tube and is elastically connected to the positioning tube through the spring.

4. The self-aligning floating pipette according to claim 3, characterized in that: The shell comprises a rectangular outer shell and a cover plate detachably covering the rectangular outer shell.

5. The self-aligning floating pipette according to claim 4, characterized in that: An indicator light is provided on one side of the rectangular housing.

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