One-key maximum range recovery type pipette

Abstract

The utility model discloses a one-key maximum range recovery type pipette which comprises a liquid extraction cylinder, a piston rod is movably inserted into the top of the liquid extraction cylinder, the bottom end of the piston rod extends into a cylinder cavity in the inner side of the liquid extraction cylinder and is fixedly connected with a piston block with the cross section of a square structure, and a handheld handle is fixedly connected to the periphery of the top end of the liquid extraction cylinder. The top end of the liquid pumping cylinder is connected with the piston rod through a driving structure, and the driving structure can enable the piston rod to automatically move upwards and can complete wide-range recovery of the pipette; through the arrangement of the driving structure, when the piston rod needs to move upwards, the gear b rotates by starting the micro motor, so that the gear a drives the threaded barrel to rotate, the piston rod drives the piston block to move upwards to the highest position, and the maximum stroke of the liquid inlet amount of the inner side of the liquid pumping barrel is recovered; therefore, the operator can better accept the method, and the method can be better executed.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid transfer guns, in particular to a liquid transfer gun capable of restoring a maximum range with one button. Background Art

[0002] A pipette is a tool used for liquid transfer in the laboratory, usually for accurately moving and dispensing micro-amounts of liquid. The design of the pipette can be adjusted to different specifications as needed to suit different experimental operations. A pipette usually consists of a handle, a liquid suction head and a liquid discharge head. The process of sucking and discharging liquid can be controlled by operating the buttons on the handle.

[0003] At present, pipettes are the most commonly used instruments in the biological industry. During the experiment, pipettes of different specifications are selected according to the sample volume. Because the sample volume is not fixed, the adjustment of the pipette will be involved. After the experiment, the pipette must be adjusted back to the maximum range. Therefore, it is necessary to design a one-click recovery to the maximum range, which is more convenient and can better maintain the pipette to a greater extent. Because sometimes people forget to adjust to the maximum range, one-click recovery can also make it easier for operators to accept and execute it better. For this reason, we have designed a one-click maximum range recovery pipette to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a one-button maximum range recovery type liquid transfer gun.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A one-button maximum range recovery type liquid transfer gun, the liquid transfer gun comprises a liquid pumping cylinder, a piston rod is movably inserted at the top of the liquid pumping cylinder, the bottom end of the piston rod extends into the inner cylinder cavity of the liquid pumping cylinder, and is fixedly connected to a piston block with a square cross-section structure, a hand-held handle is fixedly connected to the outer periphery of the top of the liquid pumping cylinder, and the top of the liquid pumping cylinder is connected to the piston rod through a driving structure, and the driving structure can make the piston rod automatically move upward, and can complete the large range recovery of the liquid transfer gun;

[0007] A needle is inserted into the gun head at the bottom end of the liquid extraction cylinder, and a quick head removal structure for quickly removing the needle is also installed on the outer side of the liquid extraction cylinder.

[0008] Preferably, the driving structure includes a threaded cylinder rotatably connected to the top end of the liquid pumping cylinder, and the threaded cylinder is threadedly connected to a threaded portion provided on the outer side of the piston rod.

[0009] Preferably, a gear a is fixedly connected to the outer side of the threaded barrel, a gear b is meshingly connected to the outer side of the gear a, the gear b is fixedly connected to the outer side of the output shaft of the micro motor, and the micro motor is fixedly connected to a cavity provided on the inner side of the handheld handle.

[0010] Preferably, a controller is fixedly connected to the outside of the liquid extraction cylinder, a button is arranged on the outside of the controller, and the controller is electrically connected to the micro motor.

[0011] Preferably, the quick head removal structure includes an elongated shell fixedly connected to the outer side wall of the liquid extraction cylinder away from the controller, the elongated shell is provided with an opening on the outer side of the liquid extraction cylinder away from the liquid extraction cylinder, a Z-shaped push plate is movably inserted on the elongated shell, the bottom end of the Z-shaped push plate is movably sleeved on the outside of the bottom gun head of the liquid extraction cylinder through a sleeve hole, the diameter of the sleeve hole is smaller than the top diameter of the needle head, a moving block is fixedly connected to the side wall of the Z-shaped push plate away from the liquid extraction cylinder, the top of the moving block is in contact with the inner top wall of the opening, slots are respectively provided on the bottom end of the moving block and the inner bottom wall of the opening, blocks are movably inserted in the two slots, and a spring is fixedly connected between the opposite ends of the two blocks.

[0012] Preferably, the vertical cross-sections of the two plug blocks are convex and inverted convex structures respectively, and hand screws are movably inserted on the two plug blocks, and one end of the hand screws is threadedly connected to the screw holes provided on the inner wall of the slot.

[0013] Compared with the prior art, the utility model has the following beneficial effects: through the setting of the driving structure, when the piston rod needs to be moved up, the micro motor is started to rotate the gear b, so that the gear a drives the threaded cylinder to rotate, and the piston rod drives the piston block to move up to the highest position, so that the maximum stroke of the liquid inlet amount of the inner side of the pumping cylinder is restored, so that the operator can better accept and then better execute;

[0014] By setting up the quick head removal structure, when the needle needs to be disassembled, the Z-shaped push plate can be pressed manually, so that the moving block compresses the spring, and the Z-shaped push plate moves down through the sleeve hole on the outside of the bottom gun head of the liquid extraction cylinder, and can push the needle down, so as to quickly realize the removal of the needle. Secondly, when the spring needs to be replaced, the two hand screws can be loosened, and the two plug-in blocks can be pulled out of the slots respectively, so that the spring can be easily replaced to avoid the problem of elastic failure of the spring after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional first-person perspective structural schematic diagram of a one-button maximum range recovery type pipette proposed by the utility model;

[0016] Figure 2 This is a three-dimensional second-view structural schematic diagram of a one-button maximum range recovery type pipette proposed by the utility model;

[0017] Figure 3 The utility model provides a one-touch maximum range recovery type pipette gun with a handle that is cut open and then unfolded in a plane.

[0018] In the figure: 1. liquid extraction cylinder; 11. hand handle; 2. piston rod; 3. driving structure; 31. threaded cylinder; 32. gear a; 33. gear b; 34. motor; 4. controller; 41. button; 5. quick head removal structure; 51. elongated shell; 52. Z-shaped push plate; 53. moving block; 54. insert block; 55. spring; 56. hand screw; 6. needle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Example

[0021] At present, the pipette is the most commonly used instrument in the biological industry. During the experiment, different specifications of pipettes are selected according to the sample volume. Because the sample volume is not fixed, the adjustment of the pipette is involved. After the experiment, the pipette must be adjusted back to the maximum range. Therefore, it is necessary to design a one-click recovery to the maximum range, which is more convenient and can better maintain the pipette to a greater extent. Because sometimes people forget to adjust to the maximum range, the one-click recovery can also make operators more accepting and better perform.

[0022] For this purpose, refer to Figure 1-3 , a one-button maximum range recovery type liquid transfer gun, the liquid transfer gun comprises a liquid pumping cylinder 1, a piston rod 2 is movably inserted at the top of the liquid pumping cylinder 1, the bottom end of the piston rod 2 extends into the inner cylinder cavity of the liquid pumping cylinder 1, and is fixedly connected to a piston block with a square cross-section structure, a hand-held handle 11 is fixedly connected to the outer periphery of the top of the liquid pumping cylinder 1, and the top of the liquid pumping cylinder 1 is connected to the piston rod 2 through a driving structure 3, and the driving structure 3 can make the piston rod 2 automatically move up, and can complete the large range recovery of the liquid transfer gun;

[0023] A needle 6 is inserted into the gun head at the bottom end of the liquid extraction cylinder 1 , and a quick head removal structure 5 for quickly removing the needle 6 is also installed on the outer side of the liquid extraction cylinder 1 .

[0024] The square piston block is not shown in the drawings. The square structure enables the driving structure 3 to drive the piston rod 2 to move upward or downward.

[0025] Furthermore, as attached Figure 1-3As shown in the figure, in order to enable the piston rod 2 to drive the piston block to move up or down, a driving structure 3 is provided, including a threaded tube 31 rotatably connected to the top of the liquid pumping cylinder 1, the threaded tube 31 is threadedly connected to the threaded portion provided on the outer side of the piston rod 2, a gear a32 is fixedly connected to the outer side of the threaded tube 31, a gear b33 is meshingly connected to the outer side of the gear a32, the gear b33 is fixedly connected to the outer side of the output shaft of the micro motor 34, the micro motor 34 is fixedly connected to the cavity provided on the inner side of the hand-held handle 11, a controller 4 is fixedly connected to the outer side of the liquid pumping cylinder 1, a button 41 is provided on the outer side of the controller 4, and the controller 4 and the micro motor 34 are electrically connected.

[0026] The controller 4 is an electrical component of the prior art, and its model can be customized according to actual conditions.

[0027] Furthermore, as attached Figure 1-3 As shown in the figure, in order to facilitate the rapid removal and replacement of the needle 6 and the replacement of the spring 55, a quick head removal structure 5 is provided, which includes an elongated shell 51 fixedly connected to the outer wall of the liquid extraction cylinder 1 away from the controller 4, and the elongated shell 51 is provided with an opening on the outer side of the liquid extraction cylinder 1 away from the liquid extraction cylinder 1, and a Z-shaped push plate 52 is movably inserted on the elongated shell 51, and the bottom end of the Z-shaped push plate 52 is movably sleeved on the outside of the bottom end gun head of the liquid extraction cylinder 1 through a sleeve hole, and the diameter of the sleeve hole is smaller than the top diameter of the needle 6, and the Z-shaped push plate 52 is away from the outer wall of the controller 4. A moving block 53 is fixedly connected to one side wall of the liquid extraction cylinder 1, and the top of the moving block 53 is in contact with the inner top wall of the opening. Slots are respectively provided on the bottom end of the moving block 53 and the inner bottom wall of the opening. Insert blocks 54 are movably inserted in the two slots. A spring 55 is fixedly connected between the opposite ends of the two insert blocks 54. The vertical sections of the two insert blocks 54 are convex and inverted convex structures respectively. Hand screws 56 are movably inserted on the two insert blocks 54, and one end of the hand screws 56 is threadedly connected to the screw holes provided on the inner wall of the slot.

[0028] The length of the moving block 53 is greater than that of the inserting block 54 , the length of the inserting block 54 is greater than that of the slot, and the length of the slot is smaller than that of the moving block 53 .

[0029] Embodiment: When using the one-button maximum range recovery type pipette gun, by manually pressing the button 41, the controller 4 controls the micromotor 34 to drive, so that the gear b33 rotates, so that the gear a32 drives the threaded tube 31 to rotate, and the piston rod 2 drives the piston block to move up to the highest position, so that the inner side of the liquid pumping cylinder 1 can be restored to the maximum stroke, so that the operator can better accept and then better execute it. Secondly, when it is necessary to disassemble the needle 6, the Z-type push plate 52 can be manually pressed, so that the moving block 53 compresses the spring 55, and the Z-type push plate 52 moves down through the sleeve hole on the outside of the bottom gun head of the liquid pumping cylinder 1, and the needle 6 can be pushed down, so as to quickly realize the disassembly of the needle 6. Secondly, when the spring 55 needs to be replaced, the two hand screws 56 can be loosened, and the two plug blocks 54 can be respectively pulled out of the slot, so that the spring 55 can be easily replaced to avoid the problem of elastic failure of the spring 55 after long-term use.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A one-button maximum range recovery type liquid transfer gun, the liquid transfer gun comprising a liquid extraction cylinder (1), a piston rod (2) movably inserted at the top of the liquid extraction cylinder (1), the bottom end of the piston rod (2) extending into the inner cylinder cavity of the liquid extraction cylinder (1), and fixedly connected to a piston block with a square cross-section, characterized in that: A hand-held handle (11) is fixedly connected to the outer periphery of the top end of the liquid extraction cylinder (1), and the top end of the liquid extraction cylinder (1) is connected to the piston rod (2) through a driving structure (3). The driving structure (3) can automatically move the piston rod (2) upward and complete the large-range recovery of the liquid pipette; A needle (6) is inserted into the gun head at the bottom end of the liquid extraction cylinder (1), and a quick head removal structure (5) for quickly removing the needle (6) is also installed on the outer side of the liquid extraction cylinder (1).

2. A one-button maximum range recovery type pipette according to claim 1, characterized in that: The driving structure (3) comprises a threaded cylinder (31) rotatably connected to the top end of the liquid pumping cylinder (1), and the threaded cylinder (31) is threadedly connected to a threaded portion provided on the outer side of the piston rod (2).

3. A one-button maximum range recovery type pipette according to claim 2, characterized in that: The outer side of the threaded cylinder (31) is fixedly connected with a gear a (32), the outer side of the gear a (32) is meshingly connected with a gear b (33), the gear b (33) is fixedly connected to the outer side of the output shaft of the micro motor (34), and the micro motor (34) is fixedly connected to a cavity provided on the inner side of the hand-held handle (11).

4. The one-button maximum range recovery type pipette according to claim 1, characterized in that: A controller (4) is fixedly connected to the outer side of the liquid extraction cylinder (1), a button (41) is arranged on the outer side of the controller (4), and the controller (4) is electrically connected to the micro motor (34).

5. The one-button maximum range recovery type pipette according to claim 1, characterized in that: The quick head removal structure (5) comprises an elongated shell (51) fixedly connected to the outer wall of the liquid extraction cylinder (1) away from the controller (4), the elongated shell (51) is provided with an opening on the outer side away from the liquid extraction cylinder (1), a Z-shaped push plate (52) is movably inserted on the elongated shell (51), the bottom end of the Z-shaped push plate (52) is movably sleeved on the outside of the bottom end gun head of the liquid extraction cylinder (1) through a sleeve hole, the diameter of the sleeve hole is smaller than the top diameter of the needle head (6), a moving block (53) is fixedly connected to a side wall of the Z-shaped push plate (52) away from the liquid extraction cylinder (1), the top end of the moving block (53) is in contact with the inner top wall of the opening, the bottom end of the moving block (53) and the inner bottom wall of the opening are respectively provided with slots, the two slots are movably inserted with insert blocks (54), and a spring (55) is fixedly connected between the opposite ends of the two insert blocks (54).

6. The one-button maximum range recovery type pipette according to claim 5, characterized in that: The vertical cross-sections of the two insert blocks (54) are convex and inverted convex structures respectively. The two insert blocks (54) are movably provided with hand screws (56), and one end of the hand screws (56) is threadedly connected to a screw hole provided on the inner wall of the slot.

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