Flaring type pipette

Abstract

The utility model relates to the technical field of pipettes, in particular to a flaring type pipette which comprises a pipetting assembly, the pipetting assembly comprises a conical tail part, a metering section, a transition section and a suction section, the conical tail part, the metering section, the transition section and the suction section are sequentially arranged from top to bottom and are integrally formed, and the metering section, the transition section and the suction section are sequentially arranged from top to bottom. A plurality of arc-shaped grooves are formed in the two sides of the metering section from top to bottom at equal intervals. The multiple slightly-sunken clamping grooves are formed in the peripheral wall of the pipe body, so that the slipping risk in the operation process is reduced; the liquid transfer device can improve the precision of liquid transfer in laboratory work and enhance the operation experience of a user, and is applicable to scenes requiring frequent operation in narrow or deep-opening containers; the novel pipette is characterized in that functionality and ergonomics are both considered, and the pipette becomes a more efficient and safer laboratory tool.

Description

Technical Field

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

[0002] As an important tool for accurately measuring and transferring liquid volume in the laboratory, the design and usage method of pipettes are crucial for the accuracy and efficiency of experiments. Hereinafter, three main types of pipettes and their characteristics will be introduced in detail, as well as a newly designed pipette aiming to improve the operation convenience and precision. Ostwald pipette The Ostwald pipette (also known as pipette or Pitot tube) is characterized by a slender nozzle at the lower end of the tube for controlling the release of liquid. The pipette also has only one fixed scale, but different from the Ostwald pipette, the remaining liquid at the tip of the pipette does not need to be blown into the container when using the pipette. Graduated pipette The graduated pipette has multiple scales, allowing users to measure different volumes of liquid. Whether the remaining liquid at the tip of this type of pipette needs to be blown out depends on whether it is marked with the word "blow".

[0003] How to improve the convenience and precision of pipettes and how to effectively ensure the suction quality are difficult problems in this field. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a flared pipette.

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

[0006] A flared pipette, comprising a pipetting assembly, the pipetting assembly includes a conical tail, a metering section, a transition section and a suction section, the conical tail, the metering section, the transition section and the suction section are arranged in sequence from top to bottom, the conical tail, the metering section, the transition section and the suction section are integrally formed, a plurality of arc-shaped grooves are equidistantly arranged from top to bottom on both sides of the metering section, and a scale line is arranged on one side of the metering section;

[0007] A conical plug is penetrated through the upper end of the conical tail.

[0008] Compared with the prior art, the innovation of the present application lies in that the orifice of the pipette is enlarged and matched with the existing internal structure of the tube wall, while ensuring that there is enough space to receive a larger volume of liquid; this flared pipette is made of high-strength materials such as high borosilicate glass; during the design process, the original size and shape are taken into consideration to ensure the adaptability of the flared mouth and that it will not exceed the size of the bottle body; a special flaring tool is manufactured to accurately control the flaring size; during processing, the pipette is fixed, the tool is used to flare, the force and speed are controlled to prevent breakage, and cooling is required to be slow to avoid bursting; after flaring, grinding or polishing is performed to remove sharp edges; finally, quality inspection is performed, including dimensional measurement and pressure testing, to ensure product accuracy and reliability.

[0009] Preferably, a resistance mechanism is provided on one side of the conical plug, and the resistance mechanism resists against the side wall of the conical tail portion, a cavity is provided inside the conical plug, a round tube is penetrated inside the conical plug, a sealing airbag is installed in the cavity, an extrusion mechanism is provided on the top of the cavity, a sliding rod is provided on the extrusion mechanism, the extrusion mechanism and the sealing airbag resist, the sliding rod is connected to the resistance mechanism, an annular opening is opened on a side wall around the cavity, the sealing airbag penetrates the annular opening and resists against the inner wall of the conical tail portion, and a closing mechanism is provided in the round tube portion.

[0010] Furthermore, through the cooperation of the conical plug and the suction component, the upper end of the suction component can be effectively closed, and through the cooperation of the corresponding mechanisms, the sealing and clamping operations can be fully realized. The negative pressure can also be formed in the suction component through an external negative pressure suction component, which can effectively carry out the suction and measurement of the liquid.

[0011] Preferably, the resistance mechanism includes a resistance plate arranged on one side of the conical plug, one end of the sliding rod is fixedly connected to the resistance plate, a notch is provided on one side of the upper end of the resistance plate, a rotating shaft is installed in the notch, and a spring is fixed between the rotating shaft and the conical plug.

[0012] Furthermore, the sliding rod can enable the resistance plate to move smoothly, and the spring can enable the resistance plate to move toward the conical plug when there is no external force. When in use, it can cooperate with the conical plug to clamp the upper end of the pipette and provide power for the operation of the extrusion mechanism.

[0013] Preferably, the extrusion mechanism includes a mounting groove opened at the top of the cavity, the sliding rod member passes through the side wall of the mounting groove and extends to one side of the conical plug, and a first pressure plate member is fixed to one end of the sliding rod member located in the mounting groove, and the upper end of the first pressure plate member is slidably installed in the mounting groove, and the first pressure plate member is in conflict with the sealing airbag.

[0014] Furthermore, through the operation of the resistance mechanism, the slide bar can push the first pressure plate to move to squeeze the sealing airbag, so that the sealing airbag moves out of the cavity so as to resist the inner wall of the tapered tail to complete the sealing operation.

[0015] Preferably, the closing mechanism includes a second pressure plate member fixed in the circular tube member, a conical opening is opened in the middle of the second pressure plate member, movable plates are slidably installed on both sides of the lower end of the second pressure plate member, the two movable plates are in conflict with each other, the two movable plates are both arranged at the lower end of the conical opening, a tension spring member is fixed on one side of the two movable plates, the two tension spring members are respectively fixed on both sides of the lower end of the second pressure plate member, and oblique rod members are rotatably connected on the opposite side walls of the circular tube member, the two oblique rod members are both located at the lower ends of the two movable plates, the two oblique rod members are staggered, and the upper ends of the two oblique rod members are rotatably connected to the lower ends of the two movable plates.

[0016] Furthermore, the conical tube fitting at the lower end of the external negative pressure adsorption component is inserted into the conical mouth and pushes the second pressure plate component to descend, so that the conical mouth can push the movable plate to move, so as to separate the two movable plates, thereby facilitating the control of the position of the second pressure plate component through the external negative pressure adsorption component, so as to control whether the conical mouth is unobstructed, and facilitate the generation of negative pressure in the suction component or the stopping of negative pressure suction.

[0017] The beneficial effects of the utility model are:

[0018] 1. The innovation of the present application is to expand the mouth of the pipette and match it with the existing internal structure of the tube wall, while ensuring that there is enough space to receive a larger volume of liquid; this expanded mouth pipette is made of high-strength materials such as high borosilicate glass; in the design process, the original size and shape are taken into consideration to ensure the adaptability of the expanded mouth and will not exceed the size of the bottle body; a special expanding tool is manufactured to accurately control the expanded mouth size; during processing, the pipette is fixed, the tool is used to expand the mouth, the force and speed are controlled to prevent cracking, and the cooling should be slow to avoid bursting; after expanding the mouth, it is ground or polished to remove sharp edges; finally, quality inspection is carried out, including size measurement and pressure testing, to ensure product accuracy and reliability;

[0019] 2. Through the cooperation of the conical plug and the suction assembly, the upper end of the suction assembly can be effectively closed, and through the cooperation of the corresponding mechanism, the sealing and clamping operations can be fully realized. The negative pressure can also be formed in the suction assembly through the external negative pressure suction component, which can effectively carry out the suction and measurement of the liquid;

[0020] 3. The sliding rod can make the contact plate move smoothly, and the spring can make the contact plate move toward the direction of the conical plug when there is no external force. When in use, it can cooperate with the conical plug to clamp the upper end of the pipette and provide power for the operation of the extrusion mechanism.

[0021] 4. Through the operation of the resistance mechanism, the sliding rod member can push the first pressing plate member to move to squeeze the sealing airbag, so that the sealing airbag moves out of the cavity so as to resist the inner wall of the tapered tail to complete the sealing operation;

[0022] 5. The conical tube fitting at the lower end of the external negative pressure adsorption component is inserted into the conical mouth and pushes the second pressure plate component to descend, so that the conical mouth can push the movable plate to move, so that the two movable plates are separated, and the position of the second pressure plate component can be controlled by the external negative pressure adsorption component to control whether the conical mouth is unobstructed, which can facilitate the generation of negative pressure in the suction component or stop negative pressure suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the suction component of the utility model;

[0024] Figure 2 This is a structural diagram of the connection between the suction assembly and the conical plug of the utility model;

[0025] Figure 3 For the utility model Figure 2 A magnified image of point A;

[0026] Figure 4 For the utility model Figure 2 The enlarged view of point B;

[0027] Figure 5 This is a schematic diagram of the structure of the tapered plug of the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the contact plate of the utility model;

[0029] In the figure: 1 suction assembly, 101 tapered tail, 102 metering section, 103 arc-shaped groove, 104 transition section, 105 suction section, 106 scale line, 2 tapered plug, 3 mounting groove, 4 sealing airbag, 5 first pressure plate, 6 contact plate, 7 notch, 8 round tube, 9 second pressure plate, 10 tapered mouth, 11 moving plate, 12 tension spring, 13 oblique rod, 14 sliding rod, 15 spring, 16 rotating shaft. DETAILED DESCRIPTION

[0030] 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.

[0031] Reference Figures 1-6A flared pipette includes a pipette component 1, which is made of materials such as high borosilicate glass. The pipette component 1 includes a tapered tail 101, a metering section 102, a transition section 104 and an absorption section 105. The tapered tail 101, the metering section 102, the transition section 104 and the absorption section 105 are arranged in sequence from top to bottom, and the tapered tail 101, the metering section 102, the transition section 104 and the absorption section 105 are integrally formed. The absorption section 105 is the head of the pipette, which is usually a slender structure, which is convenient for penetrating into the container to absorb liquid; the transition section 104 is located between the absorption section and the metering section, and is designed with a slope of 20°-30°, which helps the liquid to smoothly transition to the metering section and reduce retention during the transfer process.

[0032] The pipette is provided with a plurality of slightly concave arc grooves 103 on the outer peripheral wall of the tube body. These arc grooves 103 can fit the user's fingers, greatly reducing the risk of slipping during operation, especially when handling a narrow bottle mouth. This design makes the pipette more stable and easy to control. Both sides of the metering section 102 are provided with a plurality of arc grooves 103 at equal intervals from top to bottom, and a scale line 106 is provided on one side of the metering section 102; the metering section 102 is the main part of the pipette assembly 1, which is used to display and determine the volume of the measured liquid, and its top end is the tapered tail 101 on the pipette assembly 1.

[0033] In actual production and preparation, the positions of the multiple arc-shaped grooves 103 on both sides of the metering section 102 can be symmetrical or asymmetrical, and the sizes can be the same or different, so as to adapt to the finger sizes and different holding methods of different users.

[0034] Reference Figures 2-6 The upper end of the conical tail 101 is penetrated by a conical plug 2, and a conflict mechanism is provided on one side of the conical plug 2. The conflict mechanism conflicts with the side wall of the conical tail 101. A cavity is provided in the conical plug 2, and a round tube 8 is provided in the conical plug 2. A sealing airbag 4 is installed in the cavity. An extrusion mechanism is provided at the top of the cavity, and a sliding bar 14 is provided on the extrusion mechanism. The extrusion mechanism conflicts with the sealing airbag 4, and the sliding bar 14 is connected to the conflict mechanism. An annular opening is provided on the side wall of the cavity. The sealing airbag 4 passes through the annular opening and conflicts with the inner wall of the conical tail 101. A closing mechanism is provided in the round tube 8. Through the cooperation of the conical plug 2 and the suction assembly 1, the upper end of the suction assembly 1 can be effectively closed, and through the cooperation of the corresponding mechanism, the closing and clamping operations can be fully realized. The negative pressure can also be formed in the suction assembly 1 through the external negative pressure suction component, and the liquid can be effectively sucked and measured.

[0035] Reference Figures 2-6The resistance mechanism includes a resistance plate 6 arranged on one side of the conical plug 2, one end of the slide bar 14 is fixedly connected to the resistance plate 6, a notch 7 is arranged on one side of the upper end of the resistance plate 6, a rotating shaft 16 is installed in the notch 7, and a spring 15 is fixed between the rotating shaft 16 and the conical plug 2. The resistance plate 6 can be moved smoothly by the action of the slide bar 14, and can be moved toward the direction of the conical plug 2 by the action of the spring 15 when no external force is applied. When in use, the resistance plate 6 can cooperate with the conical plug 2 to clamp the upper end of the pipette, and can provide power for the operation of the extrusion mechanism.

[0036] Reference Figures 2-6 The extrusion mechanism includes a mounting groove 3 opened at the top of the cavity, a sliding rod 14 passes through the side wall of the mounting groove 3 and extends to one side of the tapered plug 2, and a first pressure plate 5 is fixed to one end of the sliding rod 14 located in the mounting groove 3. The upper end of the first pressure plate 5 is slidably installed in the mounting groove 3, and the first pressure plate 5 and the sealing airbag 4 are in conflict with each other. Through the operation of the conflict mechanism, the sliding rod 14 can push the first pressure plate 5 to move to squeeze the sealing airbag 4, so that the sealing airbag moves out of the cavity so as to conflict with the inner wall of the tapered tail to complete the sealing operation.

[0037] Reference Figures 2-6 The closing mechanism includes a second pressing plate 9 fixed in the round tube 8, a tapered opening 10 is provided in the middle of the second pressing plate 9, movable plates 11 are slidably mounted on both sides of the lower end of the second pressing plate 9, the two movable plates 11 are in contact with each other, the two movable plates 11 are arranged at the lower end of the tapered opening 10, a tension spring 12 is fixed on one side of the two movable plates 11, and the two tension springs 12 are respectively fixed on both sides of the lower end of the second pressing plate 9. The opposite side walls of the round tube 8 are rotatably connected with oblique rods 13, the two oblique rods 13 are located at the lower ends of the two movable plates 11, the two oblique rods 13 are staggered, and the upper ends of the two oblique rods 13 are rotatably connected to the lower ends of the two movable plates 11. The conical pipe fitting at the lower end of the external negative pressure adsorption component is inserted into the conical mouth 10 and pushes the second pressure plate component 9 to descend, so that the conical mouth 10 pushes the movable plate 11 to move, so that the two movable plates 11 are separated, and it is convenient to control the position of the second pressure plate component 9 through the external negative pressure adsorption component, so as to control whether the conical mouth 10 is unobstructed, so as to generate negative pressure in the suction component 1 or stop negative pressure absorption; after the external force disappears, the movable plate 11 is quickly driven to reset through the tension spring component 12.

[0038] In the present utility model, the suction section 105 is the head of the pipette, usually having a slender structure to facilitate deep penetration into the container to suck liquid; the transition section 104 is located between the suction section and the metering section 102 and is designed with an inclination of 20° - 30°, which helps the liquid to smoothly transition to the metering section and reduces retention during the transfer process; the pipette is provided with a plurality of slightly concave arc-shaped grooves 103 on the outer peripheral wall of the tube body. These arc-shaped grooves 103 can fit with the user's fingers, greatly reducing the risk of slipping during operation. Especially when dealing with a narrow bottle mouth, this design makes the pipette more stable and easier to control; the metering section 102 is the main part of the pipette assembly 1 and is used to display and determine the volume of the measured liquid, and its top end is the conical tail 101 on the pipette assembly 1.

[0039] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A flared pipette, comprising a pipette assembly (1), characterized in that: The suction assembly (1) comprises a conical tail (101), a metering section (102), a transition section (104) and a suction section (105); the conical tail (101), the metering section (102), the transition section (104) and the suction section (105) are arranged in sequence from top to bottom; the conical tail (101), the metering section (102), the transition section (104) and the suction section (105) are integrally formed; a plurality of arc-shaped grooves (103) are provided at equal intervals on both sides of the metering section (102) from top to bottom; and a scale mark (106) is provided on one side of the metering section (102); A conical plug (2) is provided through the upper end of the conical tail (101).

2. The flared pipette according to claim 1, characterized in that: A resistance mechanism is provided on one side of the conical plug (2), and the resistance mechanism resists against the side wall of the conical tail (101); a cavity is provided in the conical plug (2), a round tube (8) is passed through the conical plug (2), a sealing airbag (4) is installed in the cavity, a pressing mechanism is provided at the top of the cavity, a sliding bar (14) is provided on the pressing mechanism, the pressing mechanism resists against the sealing airbag (4), the sliding bar (14) and the resistance mechanism are connected, an annular opening is provided on a peripheral side wall of the cavity, the sealing airbag (4) passes through the annular opening and resists against the inner wall of the conical tail (101), and a closing mechanism is provided in the round tube (8).

3. The flared pipette according to claim 2, characterized in that: The abutment mechanism comprises an abutment plate (6) arranged on one side of the conical plug (2), one end of the slide bar (14) being fixedly connected to the abutment plate (6), a notch (7) being provided on one side of the upper end of the abutment plate (6), a rotating shaft (16) being installed in the notch (7), and a spring (15) being fixed between the rotating shaft (16) and the conical plug (2).

4. The flared pipette according to claim 2, characterized in that: The extrusion mechanism comprises a mounting groove (3) formed at the top of the cavity, the slide bar (14) passing through the side wall of the mounting groove (3) and extending to one side of the conical plug (2), a first pressure plate (5) being fixed to one end of the slide bar (14) located in the mounting groove (3), the upper end of the first pressure plate (5) being slidably mounted in the mounting groove (3), and the first pressure plate (5) being in contact with the sealing airbag (4).

5. The flared pipette according to claim 2, characterized in that: The closing mechanism comprises a second pressing plate member (9) fixed in the circular tube member (8), a conical opening (10) being provided in the middle of the second pressing plate member (9), movable plates (11) being slidably mounted on both sides of the lower end of the second pressing plate member (9), the two movable plates (11) being in contact with each other, the two movable plates (11) being arranged at the lower end of the conical opening (10), tension spring members (12) being fixed on one side of the two movable plates (11), the two tension spring members (12) being respectively fixed on both sides of the lower end of the second pressing plate member (9), oblique rod members (13) being rotatably connected on opposite side walls of the circular tube member (8), the two oblique rod members (13) being located at the lower ends of the two movable plates (11), the two oblique rod members (13) being arranged in an alternating manner, and the upper ends of the two oblique rod members (13) being rotatably connected to the lower ends of the two movable plates (11).

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