CN209465048U - A vacuum pump suction head provided with a pipette tip push-out device - Google Patents

Abstract

The utility model discloses a suction head of a vacuum pump provided with a device for pushing out the suction head of a pipette. The suction head handle is formed at the connection with the vacuum pump pipeline. The suction head handle of the utility model is provided with a pipette tip push-out device, which is convenient for pressing the push button in the pipette tip push-out device after use to quickly push out the pipette. It is easy to operate, save experimental time, reduce pollution during operation, improve experimental efficiency, and set a damping ring in the push button to avoid misoperation, and can Control the strength of pushing out the suction head, and the operation is convenient and free.

Description

A vacuum pump suction head provided with a pipette tip push-out device

technical field

The utility model relates to a suction head of a vacuum pump, in particular to a suction head of a vacuum pump provided with a device for pushing out the suction head of a pipette.

Background technique:

Vacuum pumps are widely used in various fields. In laboratories, vacuum pumps are used to absorb experimental waste liquid. In order to avoid cross-contamination between samples, experimenters often use hollow stainless steel straws as suction heads to connect various disposable suction heads. However, after processing a sample, the disposable tip needs to be replaced. Since the stainless steel straw does not have a device for automatically pushing out the disposable tip, the used disposable tip needs to be taken out by hand or tweezers, which increases sample contamination and human contact during the experiment. Hazardous waste opportunities and operating hours. In the prior art, there is no device for pushing out the disposable tip in the vacuum pump tip. Although there has been a device for pushing out the disposable tip in the pipette, it is relatively simple and does not take into account that people are pushing out the tip. Excessive force will occur when the disposable suction tip is used, causing damage to the equipment, and the problem of operating the disposable suction tip ejection device due to malfunction is not considered.

Utility model content:

The purpose of this utility model is: to provide a vacuum pump tip equipped with a pipette tip ejection device, when the disposable tip needs to be replaced, the disposable tip can be automatically pushed out, and the disposable tip can be pushed out without malfunctioning. The action of the suction head, and when the disposable suction head is pushed out, the push force can be controlled smoothly, and the equipment will not be damaged due to excessive force.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A vacuum pump tip provided with a pipette tip push-out device, comprising a tip main body, a hollow stainless steel suction tube and a pipette tip push-out device, a hollow stainless steel suction tube is fixed inside the suction head main body, and the lower end of the hollow stainless steel suction tube is a Stepped joint, the upper end of the hollow stainless steel suction tube is an external vacuum pump curved connection joint, the stepped joint is used to connect disposable pipette tips, the external vacuum pump curved connection joint is connected to the vacuum pump, and the lower end of the main body of the suction head is connected to the pipette tip Ejecting device, the hollow stainless steel suction pipe passes through the tip main body and the pipette tip ejecting device successively, the pipette tip ejecting device is against the disposable pipette tip, the pipette tip ejecting device includes an ejecting button, Press the eject button to drive the pipette tip ejector to slide along the hollow stainless steel straw to remove the disposable tip from the stepped connector;

Preferably, the tip main body includes a handle part of the tip, a guide rod and a piston spring, the guide rod is fixed on the handle part of the tip, the piston spring is sleeved on the guide rod, and the pipette tip push-out device also includes a push-out device main body, The push tube and the push button, the push tube is arranged at the lower end of the main body of the push device, the push button is set at the upper end of the push device main body, the push button is provided with a guide passage, the guide rod is installed in the guide passage in the push button, and the push button can be moved along the guide The rod slides, and there is a rigid connection between the ejection button and the body of the ejection device;

Preferably, the main body of the suction head also includes a handle portion of the suction head and a guide rod, the guide rod is fixed on the handle portion of the suction head, and a damping ring is arranged in the guide channel of the ejection button. In the initial state, the guide rod in the ejection button is inserted In the damping ring, a constant resistance is provided for the action of pushing out the button;

Preferably, the damping ring is 6 fan-shaped rubber blocks, and the fan-shaped rubber blocks are evenly distributed on the inner wall of the guide channel of the push button;

Preferably, the inner diameter d of the damping ring is smaller than the outer diameter of the guide rod;

Preferably, the stepped joint at the lower end of the hollow stainless steel suction pipe can be connected to a 1000ul, 200ul or 10ul pipette tip.

The utility model has the advantages that: the utility model can be adapted to 1000ul, 200ul and 10ul pipette tips, and can be pushed out quickly without touching the disposable pipette tips by pressing the push button, and the piston spring The push button can be returned to its original position, and the pipette tip can be replaced later, which reduces the experimental operation time, avoids sample contamination during the experiment, and avoids the chance of people contacting toxic waste liquid, and a damping ring is set in the push button, so that the operator When the suction head is pushed out of the disposable suction head, it can avoid damage to the equipment caused by excessive force. At the same time, it can avoid misoperation and disassemble the disposable suction head, which is safer.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the suction head;

Fig. 2 is a hollow stainless steel straw;

Fig. 3 is a schematic diagram of the structure of a suction head without a suction pipe;

Fig. 4 is an exploded schematic view of the pipette tip pushing device and the tip main body;

Fig. 5 is an A-A view in Fig. 4 .

Reference signs:

1. Suction head main body, 2. Hollow stainless steel suction tube, 3. Step joint, 4. External vacuum pump pipe connection joint, 5. Suction tip handle, 6. Pipette tip ejection device, 7. Push button, 8. Piston spring, 9, push tube, 10, guide rod, 11, guide channel, 12, damping ring, 13, ejection device main body.

Detailed ways

As shown in Figures 1-4, a vacuum pump tip provided with a pipette tip push-out device includes a tip main body 1, a hollow stainless steel suction tube 2 and a pipette tip push-out device 6, and the tip main body 1 is internally fixed There is a hollow stainless steel straw 2, the lower end of the hollow stainless steel straw 2 is a stepped joint 3, the upper end of the hollow stainless steel straw 2 is an external vacuum pump bend connection joint 4, and the stepped joint 3 is used to connect disposable pipette tips, external vacuum pumps The curved connection joint 4 is connected to the vacuum pump, the lower end of the tip main body 1 is connected with a pipette tip push-out device 6, and the hollow stainless steel suction tube 2 passes through the tip main body 1 and the pipette tip push-out device 6 successively, and the pipette tip The push-out device 6 is against the disposable pipette tip, and the pipette tip push-out device 6 includes a push-out button 7. When the disposable tip needs to be replaced, the push-out button 7 is pressed to drive the pipette tip push-out device 6 Slide along the hollow stainless steel straw 2 to remove the disposable tip from the stepped joint 3.

Preferably, the tip body 1 includes a tip handle 5, a guide rod 10 and a piston spring 8, the guide rod 10 is fixed on the tip handle 5, the piston spring 8 is sleeved on the guide rod 10, and the pipette tip Ejection device 6 also comprises ejection device main body 13, push tube 9 and push-out button 7, and push tube 9 is arranged on the lower end of push-out device main body 13, and push-out button is arranged on the push-out device main body 13 upper end, and push-out button 7 is provided with guide passage 11, guides Rod 10 is passed through guide channel 11 in push button 7, and push button 7 can slide along guide rod 10, is rigid connection between push button 7 and push device main body 13, therefore, push push button 7 can be driven by pressing push button 7. The tube 9 slides up and down along the hollow stainless steel straw, and the spring 8 leans against the push button 7 to provide a reset elastic force for the push button 7. After the operator stops pressing the push button 7, the push button 7 can be reset, and the push button 7 is reset. The push tube 9 resets, so that the stepped joint 3 can be installed with another new disposable suction tip.

Preferably, a damping ring 12 is provided in the guide channel 11 of the push button 7. In the initial state, the guide rod 10 located in the push button 7 is inserted into the damp ring 12, and the frictional force between the damp ring 12 and the guide rod 10 is used to , to provide a constant resistance for the action of the push button 7, so as to prevent the operator from causing damage to the equipment due to excessive force when pressing the push button 7, and at the same time, the resistance can also avoid the caused by misuse.

Preferably, as shown in FIG. 5 , the damping ring 12 is 6 fan-shaped rubber blocks or rubber sheets, and the fan-shaped rubber blocks or rubber sheets are evenly distributed on the inner wall of the guide channel 11 .

Preferably, the damping ring 12 is distributed in two layers.

Preferably, the inner diameter d of the damping ring 12 is smaller than the outer diameter of the guide rod 10. Therefore, after the guide rod 10 is inserted into the damping ring 12, the damping ring 12 is deformed, and there is a pressing force on the guide rod 10, so that the guide rod 10 Sliding provides a constant resistance.

Preferably, the elastic force of the piston spring 8 can overcome the resistance of the damping ring 12 after the operator does not press the push button, so that the push button 7 can be automatically reset.

Preferably, the lower end of the hollow stainless steel straw 2 described in this embodiment is a stepped joint 3 that can be connected to 1000ul, 200ul and 10ul pipette tips.

During the experiment, the experimental operation time can be reduced, the sample contamination during the experiment can be avoided, and the chance of human contact with toxic waste liquid can be avoided.

The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand; Modifications to the technical solutions described in the examples, or equivalent replacement of some of the technical features; and these modifications or replacements cannot make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (6)

1. a kind of vacuum pump suction equipped with suction pipette head push-off device, including head sucting body (1), hollow stainless steel suction pipe (2) and suction pipette head push-off device (6), be fixedly installed a hollow stainless steel suction pipe (2) in head sucting body (1), it is hollow not Rust steel suction pipe (2) lower end is a staged connector (3), and hollow stainless steel suction pipe (2) upper end is that external vacuum pump bend connects Head (4), staged connector (3) connect vacuum for connecting disposable suction pipette head, external vacuum pump bend jointing (4) Pump, head sucting body (1) lower end are connected with suction pipette head push-off device (6), and hollow stainless steel suction pipe (2) sequentially passes through suction nozzle master Body (1) and suction pipette head push-off device (6), suction pipette head push-off device (6) is against disposable suction pipette head, feature Be: suction pipette head push-off device (6) includes release button (7), and pressing is released button (7) driving suction pipette head and released Device (6) is slided along hollow stainless steel suction pipe (2), and disposable tip is unloaded from staged connector (3).

2. a kind of vacuum pump suction equipped with suction pipette head push-off device according to claim 1, it is characterised in that: inhale Head main body (1) includes suction nozzle portion of the handle (5), guide rod (10) and piston spring (8), and guide rod (10) is fixed on suction nozzle portion of the handle (5) on, piston spring (8) is sheathed on guide rod (10), and suction pipette head push-off device (6) further includes push-off device main body (13), ejector sleeve (9) and release button (7), ejector sleeve (9) are set to push-off device main body (13) lower end, and release button, which is set to, to be pushed away Apparatus main body (13) upper end out is released and is provided with guide channel (11) in button (7), and guide rod (10), which is arranged in, releases button (7) Interior guide channel (11), and release button (7) can be slided along guide rod (10), release button (7) and push-off device main body It (13) is rigid connection between.

3. a kind of vacuum pump suction equipped with suction pipette head push-off device according to claim 1 or 2, feature exist In: head sucting body further includes suction nozzle portion of the handle (5) and guide rod (10), and guide rod (10) is fixed on suction nozzle portion of the handle (5), pushes away It is provided with damping ring (12) in the guide channel (11) of button (7) out, under original state, is located at the guide rod released in button (7) (10) it fills in damping ring (12), provides a constant resistance to release the movement of button (7).

4. a kind of vacuum pump suction equipped with suction pipette head push-off device according to claim 3, it is characterised in that: resistance Buddhist nun's ring (12) is 6 pieces of fan-shaped rubber blocks, and fan-shaped rubber block is distributed in the inner wall for releasing the guide channel (11) of button (7).

5. a kind of vacuum pump suction equipped with suction pipette head push-off device according to claim 4, it is characterised in that: resistance Buddhist nun's ring (12) internal diameter d is less than the outer diameter of guide rod (10).

6. a kind of vacuum pump suction equipped with suction pipette head push-off device according to claim 1, it is characterised in that: institute The staged connector (3) for hollow stainless steel suction pipe (2) lower end stated can connect 1000ul, 200ul or 10ul suction pipette head.