CN103566989A - Transfer pipette - Google Patents

Abstract

The invention discloses a pipette, which comprises a pipette port with a pointed mouth at one end and a connection end used for sleeved with a rubber tube at the other end, and the outer radial direction of the connection end gradually narrows toward the port. In the present invention, since the outer diameter of the connecting end of the pipette and the medical rubber tube is gradually reduced in the direction of the port, it is convenient for the rubber tube to be sleeved on the connecting end of the pipette; the inner diameter of the general rubber tube is slightly smaller than the maximum outer diameter of the connecting end. diameter, so that the rubber tube is tightly connected after being sleeved on the connecting end, and it is not easy to fall off and leak. Moreover, the outer diameter of the port at the connecting end is small to facilitate the socketing of the rubber tube, so that the phenomenon of injuring the operator's fingers will not occur.

Description

a pipette

technical field

The invention relates to the field of chemical instruments, in particular to a pipette. the

Background technique

When doing experiments, such as when doing cell culture, operations such as drawing, adding cell culture medium, and resuspending cultured cells are generally completed by using ear wash balls and pipettes connected together by medical rubber tubes, and it is done with one hand. . The specific connection method between the pipette and the ear washing ball is as follows: take an ear washing ball, a piece of medical rubber tube and a pipette, insert the tip of the ear washing ball into the rubber tube and connect them closely, and insert the mouth of the pipette into the rubber tube. The other end of the tube, so that the pipette and the ear wash ball are connected through a rubber tube, which is convenient for use. In this way, the ring finger and little finger of the operator's right hand hold the ear wash ball in the palm, and the thumb, index finger and middle finger pinch the pipette connection end. Since there is a rubber tube connecting the ear wash ball and the pipette, the operation is convenient and flexible; Moreover, both the pipette and the ear washing ball are in the hands of the operator, so they are not easy to fall off and are relatively safe. the

When the rubber tube is socketed with the nozzle of the pipette, the inner diameter of the rubber tube is slightly smaller than the outer diameter of the nozzle of the pipette, so that the rubber tube is tightly sleeved on the pipette, the sealing effect is good, and it will not leak During the experimental operation of cell culture, the pipette must be constantly replaced, and then the rubber tube must be removed from the pipette and then put on again, but the rubber tube is not easy to be sleeved on the pipette, and it needs to be constantly socket, which is even more difficult to achieve. In addition, the spout sometimes injures the operator's fingers when the rubber tube is fitted over the pipette. the

Contents of the invention

The technical problem to be solved by the present invention is to provide a pipette on which a medical rubber sheath can be easily sleeved. the

The object of the present invention is achieved through the following technical solutions: a pipette, comprising a pipette with a pointed mouth at one end and a connecting end for connecting with a rubber tube at the other end, the outer radial port of the connecting end The direction is gradually reduced. the

Preferably, the outer radial direction of the connecting end gradually narrows toward the port to form a tapered structure. This further facilitates the sleeve of the medical rubber tube on the connecting end. the

Preferably, the cross-section of the connecting end is circular. That is, the connecting end forms a conical structure, which further facilitates the socketing of the medical rubber tube, and makes it difficult to leak air after the socketing is connected. the

Preferably, an annular protrusion is provided on the outer surface of the connecting end, and the outer diameter of the annular protrusion is smaller than the maximum outer diameter of the connecting end. Thereby increasing the tightness of the connection end and the rubber tube socket, preventing air leakage. the

Preferably, the vertical section of the annular flange is arc-shaped. It is convenient for rubber tube socketing. the

Preferably, the outer side wall of the edge of the port is provided with rounded corners. Such setting further facilitates the rubber tube to be sleeved on the connecting end, and the operator will not be injured due to the edges and corners of the port when the rubber tube is sleeved on the connecting end. the

Preferably, the vertical height of the connecting end is 2 to 8 mm. This is the optimal height for the connection end to be set at. the

Preferably, the vertical height of the connecting end is 5 mm. This is the optimal height at which the connection end is set so that the pipette can be easily inserted into the rubber tube. the

Preferably, the difference between the largest outer diameter and the smallest outer diameter of the connection end is 2mm. This arrangement makes it easier for the pipette to be inserted into the rubber tube. the

In the present invention, since the outer diameter of the connecting end of the pipette and the medical rubber tube is gradually reduced in the direction of the port, it is convenient for the rubber tube to be sleeved on the connecting end of the pipette; the inner diameter of the general rubber tube is slightly smaller than the maximum outer diameter of the connecting end. diameter, so that the rubber tube is tightly connected after being sleeved on the connecting end, and it is not easy to fall off and leak. Moreover, the outer diameter of the port at the connecting end is small to facilitate the socketing of the rubber tube, so that the phenomenon of injuring the operator's fingers will not occur. the

Description of drawings

Fig. 1 is the structural representation of pipette of the embodiment of the present invention;

Fig. 2 is another structural schematic diagram of the pipette of the embodiment of the present invention. the

Among them: 1. port; 2. connecting end; 3. pointed mouth; 4. pipetting port; 5. convex edge. the

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments. the

The invention discloses a pipette, as shown in Figures 1 and 2, comprising a pipetting port 4 with a sharp mouth 3 at one end and a connecting end 2 for connecting with a rubber tube at the other end, the outer surface of the connecting end 2 Radial The direction of port 1 gradually decreases. the

In the present invention, since the outer diameter of the connecting end 2 of the pipette and the medical rubber tube socket is gradually reduced in the direction of the port 1, it is convenient for the rubber tube to be socketed on the connecting end 2 of the pipette; the inner diameter of the general rubber tube is slightly smaller than The maximum outer diameter of the connecting end 2, so that the rubber tube is tightly connected after being sleeved on the connecting end 2, and it is not easy to fall off and leak air. Moreover, the outer diameter of the port 1 of the connecting end 2 is relatively small to facilitate the socketing of the rubber tube, so that the phenomenon of injuring the operator's fingers will not occur. the

As shown in Figure 1, the outer radial direction of the connecting end 2 gradually shrinks in the direction of the port 1 to form a tapered structure, specifically a conical structure, that is, the cross section of the connecting end 2 is a circular ring structure, which further facilitates the rubber sleeve It is connected to the connection end 2, and the socket is not easy to leak after being fixed, which is convenient for use. In this embodiment, the outer diameter of the port 1 of the connecting end 2 is slightly smaller than the inner diameter of the rubber tube, and the inner diameter of the rubber tube is slightly smaller than the maximum outer diameter of the connecting end 2, so that it is not only convenient for the rubber tube to be sleeved on the connecting end 2, but also make the sleeve After fixing, the connection is tight and it is not easy to leak. the

In this embodiment, the outer side wall of port 1 of the connecting end 2 is provided with rounded corners, so as to further facilitate the sleeve of the rubber tube on the connecting end 2, and the operator can insert the rubber tube on the connecting end of the pipette. 2 will not be hurt by the corners of port 1. the

As a further improvement of this embodiment, as shown in Figure 2, the outer surface of the connecting end 2 is provided with at least one circle of annular convex edge 5, the maximum outer diameter of the annular convex edge 5 is smaller than the maximum outer diameter of the connecting end 2, thereby increasing the connection The tightness of the end 2 and the rubber tube socket prevents air leakage. One annular bead 5 may be provided, or two or more may be arranged at intervals. And the vertical section of the annular convex edge 5 is arc-shaped, that is, the surface of the annular convex edge 5 is an arc-shaped structure, which reduces friction and facilitates the rubber tube to be sleeved on the connecting end 2 . the

The vertical height of the connection end 2 of this embodiment is 2 to 8 millimeters, as shown in Figures 1 to 2, the preferred solution is that the height of the connection end 2 is 5 mm, which is the best height for setting the connection end 2, which is convenient for the rubber tube Socket on the connection end 2, and make the connection tight. Correspondingly, the difference between the maximum outer diameter and the minimum outer diameter of the connecting end 2 is 1 mm, that is, the difference between the maximum outer radius and the minimum outer radius of the connecting end 2 is 1 mm. the

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can also be made, which should be regarded as belonging to the protection scope of the present invention. the

Claims (9)

1. A pipette, comprising a pipetting port with a pointed mouth at one end and a connection end used to socket with a rubber tube at the other end, characterized in that the outer radial direction of the connection end gradually decreases toward the port. 2. The pipette according to claim 1, characterized in that, the outer radial direction of the connecting end gradually narrows toward the port to form a tapered structure. 3. The pipette according to claim 2, characterized in that, the cross section of the connecting end is a ring structure. 4. The pipette according to claim 3, wherein the outer surface of the connecting end is provided with an annular convex edge, and the outer diameter of the annular convex edge is smaller than the maximum outer diameter of the connecting end. 5. The pipette according to claim 4, characterized in that, the vertical section of the annular flange is arc-shaped. 6. The pipette according to any one of claims 1 to 5, characterized in that, the outer side wall of the edge of the port is provided with rounded corners. 7. The pipette according to claim 3, wherein the vertical height of the connecting end is 2 to 8 mm. 8. The pipette according to claim 7, wherein the vertical height of the connecting end is 5 mm. 9. The pipette according to claim 8, wherein the difference between the largest outer diameter and the smallest outer diameter of the connecting end is 2 mm.

Images