CN212189154U

CN212189154U - Pipettor subassembly and glass pipettor

Info

Publication number: CN212189154U
Application number: CN202020199839.3U
Authority: CN
Inventors: 潘剑用; 张敏; 张文伶; 杨清刚
Original assignee: Vivachek Biotech Hangzhou Co ltd
Current assignee: Hangzhou Weice Biotechnology Co.,Ltd.
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-12-22
Anticipated expiration: 2030-02-24

Abstract

The utility model discloses a pipettor subassembly, including suction head and adapter, the adapter is made by the elasticity material, and it includes the upper segment body that can link to each other with the pipettor and the hypomere body that can link to each other with the suction head, upper segment body and hypomere body communicate mutually, the internal portion of lower segment forms and supplies the suction head to closely cooperate male connection face. The utility model also discloses a glass pipettor. The adapter of the utility model can be matched with the prior range-adjustable pipettor and the glass sucker, overcomes the defect that the plastic sucker is easy to dissolve out interferents or adsorb when moving special chemical substances, and also keeps the advantages of convenient use and accurate measurement of the pipettor; the processing precision requirement of the adapter is not high, and the manufacturing cost is low; the connection structure between the pipettor and the adapter is simple, and the connection is stable and tight; the suction head and the adapter are simply and easily inserted and connected, the connection is firm, and the air tightness is high; the suction head and the adapter are convenient to take materials, and the suction head can be used once to avoid cleaning.

Description

Pipettor subassembly and glass pipettor

Technical Field

The utility model belongs to the technical field of the pipettor accessory, especially, relate to a pipettor subassembly and glass pipettor.

Background

The range-adjustable pipettor, commonly known as a pipette gun, is one of pipettors, can be used for transferring and taking a small amount of or trace liquid in a laboratory, and has the greatest advantages of convenient use and accurate measuring and taking. The disposable plastic suction head used in the utility model does not need to be cleaned, and can avoid pollution.

At present, the liquid-transfering suction head matched with the liquid-transfering device is mainly made of plastic, and the liquid-transfering suction head made of plastic is not suitable for sucking chemical substances (such as plasticizer, bisphenol A, perfluorooctanoic acid and the like) which are easily interfered by plastic dissolved substances and chemical substances (such as tetrahydrocannabinol and the like) which are easily adsorbed on the plastic materials. While the glass pipette is not easy to be controlled precisely when sucking small volume of liquid, although the glass microinjector commonly used by technicians at present is precise, stainless steel parts in the glass microinjector are easy to be corroded by acid.

In order to solve the problems, Chinese patent CN204544225U discloses a screw-thread detachable glass pipette tip, which overcomes the disadvantages of the plastic pipette tip. The gun head consists of a glass suction head and a plastic adapter, wherein the threaded end of the glass suction head is a male thread, and the threaded end of the plastic adapter is a female thread; during pipetting operations, the male threaded end of the glass tip is mated against the female threaded end of the adapter, and the non-threaded end of the plastic adapter is mated with the pipetting gun. However, the threaded glass suction head needs to be specially manufactured, the requirement on machining precision is high, and the small-scale production cost is high. Although the cleaning solution can be repeatedly used, experimental errors are easily introduced if the cleaning solution is not clean.

A glass material, disposable suction head with low cost have had market demand, the glass tube such as the existing capillary can be regarded as the glass suction head, but there is certain problem in its connection with existing pipetting gun, need a pipetting gun accessory to make the pipetting gun and glass suction head cooperate closely, absorb and prevent revealing accurately.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a pipettor assembly which is convenient to move liquid, accurate to measure and low in use cost, and a glass pipettor with the pipettor assembly.

The utility model provides a technical scheme that its technical problem adopted is: a pipette assembly comprises a suction head and an adapter, wherein the adapter is made of elastic materials and comprises an upper section body and a lower section body, the upper section body can be connected with the pipette, the lower section body can be connected with the suction head, the upper section body is communicated with the lower section body, and a connecting surface for the suction head to be tightly matched and inserted is formed in the lower section body.

Preferably, the connecting surface is a tapered surface having an inner diameter decreasing from bottom to top along the axial direction of the adapter. The conical surface structure enables the connecting surface to be inserted into the suction heads with different specifications in a tight fit mode, and the application range is wider.

Preferably, the inner wall of the connecting surface forms at least one protrusion. The protrusions increase the tightness of the connection between the suction head and the connection surface.

Preferably, said connecting inner wall forms at least one annular flange.

Preferably, a channel is formed between the upper section body and the lower section body, and a filter element for preventing the suction object from entering the liquid transferring device is arranged in the channel.

Preferably, a filter element is arranged at the joint of the upper section body and the lower section body, and the filter element is positioned in the upper section body, or positioned in the lower section body, or partially positioned in the upper section body and partially positioned in the lower section body.

Preferably, the upper segment body comprises a connecting groove matched with the pipettor and an elastic covered edge arranged at the opening of the connecting groove, and the elastic covered edge can be outwards turned out and covered on the outer wall of the upper segment body under the action of external force. The elasticity is bordured and is guaranteed leakproofness and the fastening nature of being connected between pipettor and the adapter.

Preferably, the area of the inner side wall of the elastic binding is larger than that of the outer side wall.

Preferably, the suction head is made of a glass material; the adapter is made of latex material.

The utility model also discloses a glass pipettor, including the glass suction head, the pipettor, and the adapter, the adapter is made by the elasticity material, and it includes the upper segment body that can link to each other with the pipettor and the lower segment body that can link to each other with the glass suction head, upper segment body and lower segment body intercommunication, the internal portion of lower segment forms the face of connecting that supplies the glass suction head to closely cooperate the male.

The utility model has the advantages that: 1) the adapter can be matched with the existing range-adjustable pipettor and the glass pipette tip, overcomes the defect that an interferent is easy to dissolve out or is easy to adsorb when the plastic pipette tip is used for transferring and taking special chemical substances, and also keeps the advantages of convenient use and accurate measuring and taking of the pipettor; 2) the processing precision requirement of the adapter is not high, the manufacturing cost is low, and the adapter can be matched with suction heads with different specifications; 3) the connection structure between the pipettor and the adapter is simple, and the connection is stable and tight; the suction head and the adapter are also simply and easily inserted and connected, the connection is firm, and the air tightness is high; 4) The suction head and the adapter are convenient to take materials, and the suction head can be used once to avoid cleaning.

Drawings

Fig. 1 is a first cross-sectional view of the adapter of the present invention.

Figure 2 is a first cross-sectional view of the suction head of the present invention.

Figure 3 is a second cross-sectional view of the suction head of the present invention.

Fig. 4 is a second cross-sectional view of the adapter of the present invention.

Fig. 5 is a third cross-sectional view of the adapter of the present invention.

Fig. 6 is a fourth cross-sectional view of the adapter of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, a pipette assembly includes a tip 1 and an adapter 2, the tip 1 is made of a glass material or other materials having no influence on an experiment; the adapter 2 is made of a non-breathable elastic material such as latex.

As shown in fig. 1, the adaptor 2 includes an upper section 21 that can be connected to a pipette, a lower section 22 that can be connected to the pipette tip 1, and a channel 23 that is formed in the adaptor 2 and is hollow and used for communicating the upper section 21 and the lower section 22, and the outer wall of the adaptor 2 is generally cylindrical, but other structures are also possible.

The connection groove 211 is formed inside the upper section body 21, the pipettor can be inserted into the connection groove 211 in a matching manner, in order to ensure the connection stability of the pipettor and the upper section body 21, an elastic covering edge 212 is formed at an upper opening of the connection groove 211, the elastic covering edge 212 can be erected upwards in an initial state, after the pipettor is inserted into the connection groove 211, external force can be applied to outwards turn out the elastic covering edge 212 and cover the outer wall of the upper section body 21, and therefore the air tightness and the tightness between the pipettor and the adapter 2 can be ensured through the retraction elastic force of the elastic covering edge 212.

In order to achieve the above function, the area of the inner side wall of the elastic covering edge 212 is larger than that of the outer side wall, so that the elastic covering edge 212 can be turned outwards and downwards. In order to ensure that the elastic edge-covering 212 is tightly sleeved on the outer wall of the adapter 2, the top end of the elastic edge-covering 212 can be designed into an arc-shaped structure; the length of the elastic covering 212 may extend to a part of the upper body 21 in the axial direction, may extend to the entire length of the upper body 21 in the axial direction, or may extend to the lower body 22.

The lower section 22 has a connecting surface 223 formed therein for the suction head 1 to be inserted in a tight fit manner, in this embodiment, the connecting surface 223 may be a smooth conical surface with a gradually decreasing inner diameter from bottom to top along the axial direction of the adapter 2, and in other embodiments, the connecting surface may also be a structure with an upper opening smaller than a lower opening and an inner wall having a wavy curved surface. The lower section 22 is provided with a connection surface 223, which can insert the suction head 1 stably and hermetically by using the retraction elasticity of the elastic material, and the change of the inner diameter of the connection surface 223 makes the lower section 22 adaptable to the suction heads 1 with various calibers, for example, the axial length of the suction head 1 with a large caliber inserted into the lower section 22 is relatively short, and the axial length of the suction head 1 with a small caliber inserted into the lower section 22 is relatively long.

In order to ensure a tight connection between the suction head 1 and the connection surface 223, at least one protrusion is formed on the inner wall of the connection surface 223, which abuts against the outer wall of the suction head 1, and in order to ensure the structural stability, one or more sets of protrusions are symmetrically arranged, and one or more circles of annular flanges 224 are provided.

The channel 23 is used for communicating the suction head 1 with the liquid transfer device, a filter element 3 is arranged in the channel 23 above the lower section body 22, and the filter element 3 is used for preventing the suction object from entering the liquid transfer device to cause cross contamination; specifically, a middle section 24 with a smaller inner diameter is formed at the joint of the upper section 21 and the lower section 22, the inner diameter of the middle section can be the same as the inner diameter of the top end of the connecting surface 223, and the filter element 3 is plugged in the middle section 24 in a tight fit manner, which is the prior art and will not be described again. The suction head 1 can be a hollow cylindrical structure as shown in figure 2, or can be a structure which is mostly in a hollow cylindrical shape and has a conical end as shown in figure 3; the prior pipettes with the specification of 200 mul and below use a straight cylindrical sucker as shown in figure 2, such as a common capillary glass blood collection tube on the market; the prior pipettor with the specification of more than 200 mul adopts a suction head with larger pipe diameter and thinner tail end.

The utility model provides a glass pipettor, includes glass suction head, pipettor and adapter, and the pipettor is current adjustable range pipettor, also can be fixed range pipettor, and glass suction head and adapter structure are the same with the aforesaid, do not give unnecessary details again.

Example 2

The difference between this embodiment and embodiment 1 is that, as shown in fig. 4, no channel 23 is provided between the upper section body 21 and the lower section body 22, the connection surface 223 extends to the bottom of the upper section body 21, and the filter cartridge 3 is provided at the connection position of the upper section body 21 and the lower section body 22, and the filter cartridge 3 is completely disposed in the upper section body 21 and is located at the bottom of the upper section body 21, and is of a thin column structure with a large cross-sectional area.

The other structures are the same as those of embodiment 1, and are not described again.

Example 3

The difference between this embodiment and embodiment 1 is that, as shown in fig. 5, no channel 23 is provided between the upper section body 21 and the lower section body 22, the connection surface 223 extends to the bottom of the upper section body 21, and the filter element 3 is provided at the connection position of the upper section body 21 and the lower section body 22, and the filter element 3 is completely placed in the lower section body 22 and is located at the top of the lower section body 22, and is in a frustum structure with a small top and a large bottom.

Example 4

The difference between this embodiment and embodiment 1 is that, as shown in fig. 6, no passage 23 is provided between the upper section body 21 and the lower section body 22, the connection surface 223 extends to the bottom of the upper section body 21, the filter element 3 is provided at the connection position of the upper section body 21 and the lower section body 22, the filter element 3 is partially located in the upper section body 21 and partially located in the lower section body 22, the upper half part thereof is a thin column structure with a large cross-sectional area, and the lower half part thereof is a frustum-shaped structure with a small upper part and a large lower part.

The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, and any modifications and variations of the present invention are within the spirit and scope of the following claims.

Claims

1. A pipette assembly comprising a tip (1) and an adapter (2), characterized in that: the adapter (2) is made of elastic materials, and comprises an upper section body (21) which can be connected with a pipette and a lower section body (22) which can be connected with the suction head (1), wherein the upper section body (21) is communicated with the lower section body (22), and a connecting surface (223) for the suction head (1) to be tightly matched and inserted is formed inside the lower section body (22).

2. The pipette assembly of claim 1, wherein: the connecting surface (223) is a conical surface with the inner diameter reduced from bottom to top along the axis direction of the adapter (2).

3. The pipette assembly according to claim 1 or 2, characterized in that: the inner wall of the connecting surface (223) forms at least one bulge.

4. The pipette assembly according to claim 1 or 2, characterized in that: the inner wall of the connecting surface (223) forms at least one annular flange (224).

5. The pipette assembly of claim 1, wherein: a channel (23) is formed between the upper section body (21) and the lower section body (22), and a filter element (3) for preventing the suction object from entering the pipette is arranged in the channel (23).

6. The pipette assembly of claim 1, wherein: the filter element (3) is arranged at the joint of the upper section body (21) and the lower section body (22), and the filter element (3) is positioned in the upper section body (21), or positioned in the lower section body (22), or partially positioned in the upper section body (21) and partially positioned in the lower section body (22).

7. The pipette assembly of claim 1, wherein: the upper segment body (21) comprises a connecting groove (211) matched with the pipette and an elastic covered edge (212) arranged at the opening of the connecting groove (211), and the elastic covered edge (212) can be outwards turned out and covered on the outer wall of the upper segment body (21) under the action of external force.

8. The pipette assembly of claim 7, wherein: the area of the inner side wall of the elastic edge covering (212) is larger than that of the outer side wall.

9. The pipette assembly of claim 1, wherein: the suction head (1) is made of glass materials; the adapter (2) is made of latex materials.

10. The utility model provides a glass pipettor, includes glass suction head, pipettor, and adapter, its characterized in that: the adapter is made of elastic materials and comprises an upper section body and a lower section body, wherein the upper section body can be connected with the liquid transfer device, the lower section body can be connected with the glass suction head, the upper section body is communicated with the lower section body, and a connecting surface for the glass suction head to be tightly matched and inserted is formed inside the lower section body.