Medical pipettor

Abstract

The utility model discloses a medical pipettor and belongs to the technical field of pipettors. A medical pipettor comprises a pipette, a suction head is inserted into the bottom end of the pipette, a piston is mounted in the pipette, the medical pipettor further comprises a shell mounted at the top end of the pipette, a driving part is arranged in the shell and used for driving the piston to slide in the pipette, and a suction nozzle is mounted at the bottom end of the shell and used for driving the piston to slide in the pipette. The shell is fixedly connected to the transfer pipette, an elastic rod is mounted on the shell, and the end part of the elastic rod faces the suction head; the controller, the liquid suction button, the liquid drainage button, the first motor and the piston are used in cooperation, liquid can be automatically sucked and released in a mechanical mode, the liquid suction and release speed is more stable and controllable, and then medical staff in a laboratory can conveniently transfer the liquid.

Description

Technical Field

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

[0002] A pipette, also known as a pipette gun, is an instrument used to transfer liquids quantitatively. It is widely used in medical laboratory testing to transfer small or trace amounts of liquids. Its basic principle is to rely on the up and down movement of the piston in the device to complete the absorption and release of liquids.

[0003] When using some current pipettes, by manually pressing the joystick, the piston can be driven to move in the pipette, thereby sucking and transferring the liquid. However, in actual use, medical personnel cannot stably control the suction and discharge speed by manual operation, which makes it inconvenient for medical personnel to operate. In addition, when transferring and discharging the liquid, due to the certain tension and adhesion on the surface of the liquid, some residual liquid is easily attached to the pipette tip and causes wall hanging, thereby affecting the liquid transfer efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the current pipette is inconvenient for medical personnel to operate and some residual liquid is easily attached to the tip, thereby affecting the liquid transfer efficiency.

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

[0006] A medical pipette comprises a pipette, a suction tip being inserted into the bottom end of the pipette, a piston being installed in the pipette, and further comprising: a shell mounted on the top end of the pipette, wherein a driving portion is provided in the shell, and the driving portion is used to drive the piston to slide in the pipette; an outer shell fixedly connected to the pipette, wherein an elastic rod is installed on the shell, the end of the elastic rod facing the suction tip, and a pushing portion for driving the elastic rod to impact the suction tip is provided in the shell.

[0007] In order to facilitate driving the piston to slide in the pipette, preferably, the driving part includes: a first motor, which is fixedly installed in the shell, wherein a screw is rotatably connected to the shell, and the top of the screw and the output end of the first motor are fixedly connected with mutually meshing gears, a screw sleeve is slidably installed on the shell, the screw sleeve is threadedly connected to the screw, and the piston is fixedly connected to the bottom end of the screw sleeve; a controller with a liquid aspiration button and a liquid discharge button is fixedly installed on the shell, wherein the first motor is electrically connected to the controller.

[0008] In order to guide the screw sleeve, further, a guide rail is fixedly connected to the bottom of the shell, a slider is fixedly connected to the screw sleeve, and the slider is longitudinally slidably connected to the guide rail.

[0009] In order to drive the elastic rod to hit the surface of the suction head, preferably, the pushing part includes: a second motor, fixedly installed inside the shell, wherein a rotating rod is rotatably connected inside the shell, and the top of the rotating rod and the output end of the second motor are fixedly connected to a pulley connected by a belt, and a cam is fixedly connected to the rotating rod; a movable plate, connected to the shell through an elastic member, wherein the elastic rod is fixedly connected to the movable plate, and when the rotating rod rotates, the cam will slide on the surface of the movable plate.

[0010] In order to elastically support the movable plate, the elastic member further includes a spring, a movable groove is opened through the outer shell, the movable plate is horizontally slidably connected in the movable groove, and the two ends of the spring are respectively fixedly connected to the inner wall of the movable groove and the surface of the movable plate.

[0011] In order to facilitate the disassembly and assembly of the pipette and the housing, preferably, a screw groove is provided on the top of the pipette, and a screw head is fixedly connected to the bottom of the housing, and the screw head is threadedly connected in the screw groove.

[0012] Compared with the prior art, the present invention provides a medical pipette with the following features:

[0013] Beneficial effects:

[0014] 1. The medical pipette, through the coordinated use of a controller, a liquid aspiration button, a liquid discharge button, a first motor, and a piston, can automatically aspirate and release liquids in a mechanical manner, and the aspiration and release speed of the liquid is more stable and controllable, thereby facilitating liquid transfer operations by medical personnel in the laboratory.

[0015] 2. By starting the second motor, the medical pipette can drive the elastic rod to continuously impact the surface of the tip, causing the tip to vibrate, which can shake off the residual liquid attached to the tip, making the liquid transfer and discharge more complete, reducing the loss during the liquid transfer process, and thus improving the liquid transfer efficiency.

[0016] The parts not involved in this device are the same as the existing technology or can be implemented by using the existing technology. The utility model solves the problem that the current pipette is inconvenient for medical personnel to operate and some residual liquid easily adheres to the tip, thereby affecting the liquid transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the axonometric structure of a medical pipette proposed in the present utility model;

[0018] Figure 2 This is an exploded view of a medical pipette proposed in the present utility model;

[0019] Figure 3 A partial cross-sectional diagram of a medical pipette proposed in this utility model Figure 1 ;

[0020] Figure 4 A partial cross-sectional diagram of a medical pipette proposed in this utility model Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the partial axonometric structure of a medical pipette proposed by the utility model.

[0022] In the figure: 1. Pipette; 2. Tip; 3. Piston; 4. Housing; 41. Screw groove; 42. Screw head; 5. First motor; 51. Screw; 52. Gear; 53. Screw sleeve; 54. Guide rail; 55. Slider; 6. Controller; 61. Aspiration button; 62. Discharge button; 7. Housing; 8. Elastic rod; 9. Second motor; 91. Rotating rod; 92. Moving plate; 93. Cam; 94. Pulley; 95. Moving groove; 96. Spring. DETAILED DESCRIPTION

[0023] 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 the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] Example:

[0026] Reference Figure 1-Figure 5The embodiment of the utility model provides a medical pipette, including a pipette 1, a suction tip 2 is inserted into the bottom end of the pipette 1, a piston 3 is installed in the pipette 1, a transparent observation window is provided on the pipette 1, and scale lines are provided on the transparent observation window to observe the aspiration and release capacity of the solution, and also includes: a shell 4, which is installed at the top end of the pipette 1, wherein a driving part is provided in the shell 4, and the driving part is used to drive the piston 3 to slide in the pipette 1; an outer shell 7, which is fixedly connected to the pipette 1, wherein an elastic rod 8 is installed on the outer shell 7, and the end of the elastic rod 8 faces the suction tip 2, and a top moving part for driving the elastic rod 8 to hit the suction tip 2 is provided in the outer shell 7.

[0027] Specifically, during use, the driving part can be set to drive the piston 3 to slide up and down in the pipette 1, and the liquid can be automatically sucked and released in a mechanical manner, and the suction and release speed of the liquid is more stable and controllable, which makes it easier for medical personnel in the laboratory to transfer the liquid. The elastic rod 8 can be driven to continuously impact the surface of the suction tip 2 through the setting of the pushing part, causing the suction tip 2 to vibrate, which can shake off the residual liquid attached to the suction tip 2, thereby improving the liquid transfer efficiency.

[0028] The driving part includes: a first motor 5, which is fixedly installed in a shell 4, wherein a screw 51 is rotatably connected to the shell 4, and the top of the screw 51 and the output end of the first motor 5 are fixedly connected to mutually meshing gears 52, a screw sleeve 53 is slidably installed on the shell 4, the screw sleeve 53 is threadedly connected to the screw 51, and the piston 3 is fixedly connected to the bottom end of the screw sleeve 53; a controller 6 equipped with a liquid suction button 61 and a liquid discharge button 62 is fixedly installed on the shell 4, wherein the first motor 5 is electrically connected to the controller 6.

[0029] Specifically, when in use, by pressing the aspiration button 61 on the controller 6, the first motor 5 rotates forward and drives the gear 52 and the screw 51 to rotate together. Under the action of the thread, the screw sleeve 53 drives the piston 3 to slide upward in the pipette 1, so that the liquid in the container is sucked into the pipette 1 through the suction head 2. The aspiration can be stopped immediately by releasing the aspiration button 61, and then the discharge button 62 on the controller 6 is pressed to reverse the first motor 5 and drive the piston 3 to slide downward in the pipette 1, so that the liquid aspirated by the pipette 1 is discharged into another container. The discharge can be stopped immediately by releasing the discharge button 62 during the discharge, and the discharge can be continued by pressing it again, which can facilitate the medical staff in the laboratory to transfer the liquid.

[0030] A guide rail 54 is fixedly connected to the bottom of the housing 4 , a slider 55 is fixedly connected to the screw sleeve 53 , and the slider 55 is longitudinally slidably connected to the guide rail 54 .

[0031] Specifically, by providing the guide rail 54 and the slider 55 , the screw sleeve 53 can be guided to prevent it from rotating along with the screw rod 51 .

[0032] The pushing part includes: a second motor 9, which is fixedly installed inside the shell 7, wherein a rotating rod 91 is rotatably connected inside the shell 7, and a pulley 94 connected by a belt is fixedly connected to the top of the rotating rod 91 and the output end of the second motor 9, and a cam 93 is fixedly connected to the rotating rod 91; a movable plate 92, which is connected to the shell 7 through an elastic member, wherein the elastic rod 8 is fixedly connected to the movable plate 92, and when the rotating rod 91 rotates, the cam 93 will slide on the surface of the movable plate 92.

[0033] Specifically, after the liquid is transferred and discharged to another container, the second motor 9 is started, and the pulley 94 and the rotating rod 91 are driven to rotate, and the cam 93 is driven to squeeze the movable plate 92, so that the cam 93 slides over the surface of the movable plate 92. Under the action of the squeezing force, the movable plate 92 can slide back and forth laterally in the movable groove 95 through the spring 96, and at the same time drive the elastic rod 8 to continuously impact the surface of the suction head 2, so that the suction head 2 vibrates, and the residual liquid attached to the suction head 2 can be shaken off.

[0034] The elastic member includes a spring 96 , a movable groove 95 is formed through the housing 7 , the movable plate 92 is connected to the movable groove 95 in a transverse sliding manner, and the two ends of the spring 96 are fixedly connected to the inner wall of the movable groove 95 and the surface of the movable plate 92 respectively.

[0035] Specifically, by providing the moving groove 95 and the spring 96 , the moving plate 92 can be elastically supported, so that the moving plate 92 can slide back and forth laterally in the moving groove 95 when subjected to a squeezing force.

[0036] A screw groove 41 is formed on the top of the pipette 1 , and a screw head 42 is fixedly connected to the bottom of the housing 4 . The screw head 42 is threadedly connected in the screw groove 41 .

[0037] Specifically, the arrangement of the screw groove 41 and the screw head 42 facilitates the disassembly and assembly of the pipette 1 and the housing 4 , thereby facilitating the cleaning and maintenance of the interior of the pipette 1 and the piston 3 , thereby increasing the service life of the machine.

[0038] During use of the medical pipette, by pressing the aspiration button 61 on the controller 6, the first motor 5 rotates forward and drives the gear 52 and the screw 51 to rotate together. Under the action of the thread, the sleeve 53 drives the piston 3 to slide upward in the pipette 1, so that the liquid in the container can be sucked into the pipette 1 through the suction head 2. The aspiration can be stopped immediately by releasing the aspiration button 61, and then the discharge button 62 on the controller 6 is pressed to reverse the first motor 5 and drive the piston 3 to slide downward in the pipette 1, so that the liquid aspirated in the pipette 1 is discharged into another container. The discharge can be stopped immediately by releasing the discharge button 62 during the discharge, and the discharge can be continued by pressing it again. Therefore, through the coordinated use of the controller 6, the aspiration button 61, the discharge button 62, the first motor 5 and the piston 3, the liquid can be automatically aspirated and discharged in a mechanical manner, and the aspiration and discharge speed of the liquid is more stable and controllable, thereby facilitating the medical staff in the laboratory to perform liquid transfer operations;

[0039] In addition, after the liquid is transferred and discharged to another container, the second motor 9 is started, and the pulley 94 and the rotating rod 91 are driven to rotate, and the cam 93 is driven to squeeze the movable plate 92, so that the cam 93 slides over the surface of the movable plate 92. Under the action of the squeezing force, the movable plate 92 can slide back and forth laterally in the movable groove 95 through the spring 96, and at the same time drive the elastic rod 8 to continuously impact the surface of the suction head 2, so that the suction head 2 vibrates, which can shake off the residual liquid attached to the suction head 2, make the liquid transfer and discharge more complete, reduce the loss during the liquid transfer process, and thus improve the liquid transfer efficiency.

[0040] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A medical pipette, comprising a pipette (1), characterized in that: The bottom end of the pipette (1) is plugged with a suction head (2), a piston (3) is installed in the pipette (1), and further comprises: A housing (4) is mounted on the top of the pipette (1). Wherein, a driving portion is provided in the housing (4), and the driving portion is used to drive the piston (3) to slide in the pipette (1); The housing (7) is fixedly connected to the pipette (1). An elastic rod (8) is mounted on the housing (7), the end of the elastic rod (8) faces the suction head (2), and a driving portion for driving the elastic rod (8) to impact the suction head (2) is provided in the housing (7).

2. A medical pipette according to claim 1, characterized in that, The driving unit includes: A first motor (5) is fixedly mounted in the housing (4). The housing (4) is rotatably connected to a screw rod (51), the top end of the screw rod (51) and the output end of the first motor (5) are fixedly connected to mutually meshing gears (52), a screw sleeve (53) is slidably mounted on the housing (4), the screw sleeve (53) is threadedly connected to the screw rod (51), and the piston (3) is fixedly connected to the bottom end of the screw sleeve (53); A controller (6) equipped with a liquid suction button (61) and a liquid discharge button (62) is fixedly mounted on the housing (4). Wherein, the first motor (5) is electrically connected to the controller (6).

3. A medical pipette according to claim 2, characterized in that, The bottom of the housing (4) is fixedly connected to a guide rail (54), the screw sleeve (53) is fixedly connected to a slider (55), and the slider (55) is longitudinally slidably connected to the guide rail (54).

4. A medical pipette according to claim 1, characterized in that, The pushing part includes: The second motor (9) is fixedly mounted inside the housing (7). A rotating rod (91) is rotatably connected in the housing (7), a pulley (94) connected via a belt is fixedly connected to the top of the rotating rod (91) and the output end of the second motor (9), and a cam (93) is fixedly connected to the rotating rod (91); The movable plate (92) is connected to the housing (7) via an elastic member. The elastic rod (8) is fixedly connected to the movable plate (92), and when the rotating rod (91) rotates, the cam (93) slides on the surface of the movable plate (92).

5. A medical pipette according to claim 4, characterized in that, The elastic member includes a spring (96), a movable groove (95) is provided through the housing (7), the movable plate (92) is connected to the movable groove (95) in a transverse sliding manner, and the two ends of the spring (96) are fixedly connected to the inner wall of the movable groove (95) and the surface of the movable plate (92) respectively.

6. A medical pipette according to claim 1, characterized in that: A screw groove (41) is provided on the top of the pipette (1), and a screw head (42) is fixedly connected to the bottom of the housing (4), and the screw head (42) is threadedly connected in the screw groove (41).

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