CN213581009U

CN213581009U - Multifunctional sample injection needle

Info

Publication number: CN213581009U
Application number: CN202022613652.6U
Authority: CN
Inventors: 林春生; 陈克彦; 戴相辉; 林志杰
Original assignee: Ruike Group Xiamen Co ltd
Current assignee: Ruike Group Xiamen Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-06-29
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a multi-functional sampling needle, including sampling needle and plunger head, the sampling needle forms the external screw thread section in the top of syringe needle, just the sampling needle forms sealed face in the top of external screw thread section, set up the installation passageway in the middle of the plunger head and supply the sampling needle to pass, the inside internal thread section that forms of installation passageway, the plunger head is fixed through the cooperation of internal thread section and external screw thread section on the sampling needle, the inside inner ring groove that still forms of installation passageway, inner ring groove are located the top of internal thread section, and the built-in first O type circle of inner ring groove is with sealed cooperation sealed face. The present case has increased a plunger head on original syringe needle, and the overhead internal and external O type circle of supporting of plunger can become the plunger rod immediately the syringe needle under the condition that need not dismantle the syringe needle, increases the functionality of syringe needle, saves other parts such as plunger rod to very big reduce cost also increases the qualification rate, satisfies the demand of big small enterprise.

Description

Multifunctional sample injection needle

Technical Field

The utility model relates to an experimental apparatus technical field, in particular to multi-functional sampling needle.

Background

The existing sample injection needle has a monotonous function and is mainly used for absorbing liquid in containers such as test tubes and the like, as shown in fig. 1, the sample injection needle on the market at present has the characteristics of how to prevent corrosion or keep rigidity and the like, but few multifunctional sample injection needles are provided, and if the sample injection needle needs to perform large-volume sample injection or is inserted into a plunger rod and the like, the actions such as sealing and the like can be only performed on the plunger rod or a large-volume kit, so that the cost is very high.

The most reliable sealing type liquid sucking and pushing plunger rod structure at present is shown in figure 2 and mainly comprises two parts, wherein the first part is as follows: the fixing seat 100' is fixed on the instrument and can not be disassembled, the second part is a plunger rod assembly, and the plunger rod comprises 7 parts: the upper sealing gasket 1 ', the stainless steel joint 2 ', the plunger rod 3 ', the liquid passing pipeline 4 ', the lower sealing gasket 5 ', the O-shaped ring 6 ' and the fixing head 7 ', the upper end of the stainless steel joint 2 ' is connected to the bottom of the fixing seat 100 ', the lower end of the stainless steel joint 2 ' is connected with the head of the plunger rod 3 ', and the fixing head 7 ' is arranged in the tail of the plunger rod 3 '. If the stainless steel joint 2 'needs to be moved by a wrench or the like to replace the plunger rod 3', then the whole plunger rod assembly is removed, and then a plunger rod with a different specification is replaced, and finally the plunger rod assembly is fixed by a wrench or the like. It can be seen that the existing sealed post-passing parts are complex and numerous, which increases the production cost and makes replacement more troublesome, and once the service life is reached, the entire set of plunger rod assemblies needs to be replaced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-functional sampling needle, under the condition that need not dismantle the sampling needle, only need increase the accessory on original sampling needle, just can become the plunger rod to the sampling needle immediately, simple structure, it is with low costs.

To achieve the above object, the solution of the present invention is: the utility model provides a multi-functional syringe, includes syringe and plunger head, the syringe forms the external screw thread section in the top of syringe needle, just the syringe forms sealed face in the top of external screw thread section, set up the installation passageway in the middle of the plunger head and supply the syringe to pass, the inside internal thread section that forms of installation passageway, the plunger head is fixed through the cooperation of internal thread section and external screw thread section on the syringe, the inside interior ring groove that still forms of installation passageway, interior ring groove are located the top of internal thread section, and the built-in first O type circle of interior ring groove is with sealed cooperation sealed face.

Preferably, an outer ring groove is formed in the outer portion of the plunger head, and a second O-shaped ring is arranged in the outer ring groove.

Preferably, the upper end of the internal thread section forms an upper stepped surface, and the lower end of the sealing surface forms a lower stepped surface matched with the upper stepped surface.

Preferably, the tip of the needle is notched.

After the technical scheme is adopted, the beneficial effects of the utility model reside in that: the utility model discloses only need increase plunger head of one section screw-thread fit on original syringe, at the overhead internal and external O type circle of forming a complete set of plunger, just so can guarantee the leakproofness of syringe when advancing the appearance at every turn, saved the cost and the assembly efficiency of advancing the appearance external member by a wide margin, and then also improved the qualification rate of advancing the appearance. The existing ordinary sample injection needle has a single function, can only do functions of liquid suction and spitting without sealing, and the sample injection needle can be added with various accessories on the needle head only by adding one section of thread on the needle head to realize new functions, if a plunger head is added, the plunger rod can be changed into a plunger rod, and the sensor is added to realize the functions of liquid level detection and the like. The change of plunger head need not be with the help of instruments such as spanner, only need the hand to back out the plunger head and can pull down the plunger head, then changes the overhead going of plunger of other specifications, accomplishes the plunger head of the different specifications of quick replacement for the sample container of supporting different specifications, simple and convenient.

Drawings

FIG. 1 is a schematic structural diagram of a prior art injection needle;

FIG. 2 is a schematic view of a prior art plunger rod construction;

FIG. 3 is a schematic structural view of a plunger head associated with a sampling needle according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the sample injection needle according to an embodiment of the present invention before being engaged with the plunger head;

fig. 5 is a schematic structural view of the sample injection needle and the plunger head according to an embodiment of the present invention.

Description of reference numerals:

the device comprises a fixed seat 1, a sample injection needle 2, a needle head 21, an external thread section 22, a sealing surface 23, a lower step surface 24, a plunger head 3, a mounting channel 31, an internal thread section 32, an internal annular groove 33, a first O-shaped ring 34, an external annular groove 35, a second O-shaped ring 36 and an upper step surface 37.

Detailed Description

The present invention will be described in detail with reference to fig. 3 to 5 and the specific embodiments.

The utility model provides a multi-functional injection needle, including injection needle 2 and plunger head 3, please heavily refer to fig. 4 and fig. 5, the top of injection needle 2 is fixed on fixing base 1, injection needle 2 forms external screw thread section 22 in the top of syringe needle 21, just injection needle 2 forms sealed face 23 in the top of external screw thread section 22, set up installation passageway 31 in the middle of the plunger head 3 and supply injection needle 2 to pass, the inside internal thread section 32 that forms of installation passageway 31, plunger head 3 is fixed through the cooperation of internal thread section 32 with external screw thread section 22 on the injection needle 2, the inside internal ring groove 33 that still forms of installation passageway 31, internal ring groove 33 are located the top of internal thread section 32, and the internal ring groove 33 embeds first O type circle 34 with sealed cooperation sealed face 23 prevents sealed face 23 weeping.

The upper end of the female thread section 32 forms an upper stepped surface 37, and the lower end of the sealing surface 23 forms a lower stepped surface 24 that is engaged with the upper stepped surface 37. The plunger head 3 can be positioned and matched on the sample injection needle 2 through the matching of the upper step surface 37 and the lower step surface 24.

The tail end of the needle head 21 is a needle point, and the needle point is provided with a notch for ensuring that the needle point cannot be sealed with the flat bottom of the sample bottle.

The utility model discloses the during operation, plunger head 3 is twisted earlier on to syringe 2, then the syringe inserts takes the sample container of imbibition to inhale kind, outer annular groove 35 is seted up to the outside of plunger head 3, and outer annular groove 35 embeds second O type circle 36, thereby makes plunger head 3 plants through the opening seal of second O type circle 36 with the sample container, forms good gas tightness. The number of the inner annular grooves 33 and the outer annular grooves 35 can be increased according to the axial length of the plunger head 3, the number of correspondingly arranged O-shaped rings is increased, and the sealing performance is better.

Therefore, the plunger head 3 is added to the original sampling needle, the plunger head 3 is matched with the inner O-shaped ring and the outer O-shaped ring, the sampling needle 2 can be immediately changed into the plunger rod under the condition that the sampling needle is not required to be detached, the functionality of the sampling needle is increased, other components such as the plunger rod are saved, the cost is greatly reduced, the qualified rate is increased, and the requirements of large and small enterprises are met.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the design of the present application, and all equivalent changes made according to the design key of the present application fall within the protection scope of the present application.

Claims

1. A multi-functional injection needle which characterized in that: including syringe needle and plunger head, the syringe needle forms the external screw thread section in the top of syringe needle, just the syringe needle forms sealed face in the top of external screw thread section, set up the installation passageway in the middle of the plunger head and supply the syringe needle to pass, the inside internal thread section that forms of installation passageway, the plunger head is fixed through the cooperation of internal thread section and external screw thread section on the syringe needle, the inside inner ring groove that still forms of installation passageway, the inner ring groove is located the top of internal thread section, and the built-in first O type circle of inner ring groove is with sealed cooperation sealed face.

2. The multi-functional injection needle of claim 1, characterized in that: an outer ring groove is formed in the outer portion of the plunger head, and a second O-shaped ring is arranged in the outer ring groove.

3. The multi-functional injection needle of claim 1, characterized in that: an upper step surface is formed at the upper end of the internal thread section, and a lower step surface matched with the upper step surface is formed at the lower end of the sealing surface.

4. The multi-functional injection needle of claim 1, characterized in that: the end of the needle head is provided with a notch.