A high precision syringe

Abstract

The utility model discloses a high-precision syringe, including a syringe body and an end portion, wherein the syringe body and the end portion are made of Ultem or PPSU in one piece; one end of the syringe body is the end portion, and one end of the end portion is a connecting portion, wherein the connecting portion has a top end as a limiting portion, and the outer side of the limiting portion is a boss portion; the syringe body is a containing cavity, wherein the containing cavity has an inner wall component near the end portion, and the containing cavity is arranged in the inner wall portion. The syringe of the utility model simplifies the manufacturing process and improves production efficiency; it is made of an integrated structure, which avoids the waiting time caused by the use of adhesive and speeds up the manufacturing speed. Accordingly, due to the use of integrated manufacturing, the situation that the consistency caused by assembly cannot be guaranteed is avoided, and high precision is achieved; the precision deviation caused by the glass tube is avoided; and the situation that the syringe precision is reduced due to the corrosion of the seal by chemical reagents and the like is avoided.

Description

Technical Field

[0001] The utility model relates to a syringe, in particular to a high-precision syringe. Background Art

[0002] High-precision syringes or precision syringes are widely used in laboratory environments such as biomedicine, chemistry, and food, or in hospitals and other places for tasks such as pipetting. They are generally installed on pipetting equipment for use.

[0003] At present, such syringes are generally connected by a glass tube and a metal threaded cap through adhesive, and a sealing ring is sandwiched between the glass tube and the metal threaded cap. The sealing ring is generally made of polytetrafluoroethylene. This type of syringe has some disadvantages, such as:

[0004] 1. Since the production method requires the various components to be combined, the glue needs to wait for solidification, the production efficiency is low, the yield is low, and the consistency of the various parts after assembly cannot be fully guaranteed, which significantly affects the accuracy and quality of the syringe and cannot achieve high precision;

[0005] 2. It is difficult to control the inner and outer diameters of the glass tube, which will affect the actual pipetting accuracy. The inner wall will also be rough due to environmental factors and mold wear, which will affect the accuracy and quality of the operation after long-term operation.

[0006] 3. During the production process, since adhesive connection is required to form the syringe, when the syringe is used and comes into contact with some chemical reagents, it will be corroded or dissolved, causing the syringe to be unusable or its accuracy to be reduced.

[0007] 4. As a seal, since it is sandwiched between two components, it will move inside the structure due to the influence of force and affect the seal, especially the sealing component made of polytetrafluoroethylene. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide a high-precision syringe, which solves the problem of low precision of the existing syringes.

[0009] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0010] The utility model provides a high-precision syringe, comprising a syringe body and an end portion, wherein:

[0011] The syringe body and the end portion are made in one piece.

[0012] As a preferred technical solution of the present invention, the syringe body and the end portion are made of Ultem or PPSU in one piece.

[0013] As a preferred technical solution of the utility model, one end of the syringe body is the end portion, and one end of the end portion is the connecting portion, wherein:

[0014] The connecting portion has a top end which is a limiting portion, and an outer side of the limiting portion is a boss portion;

[0015] The syringe body contains a receiving cavity, wherein:

[0016] The accommodating cavity has an inner wall component portion near the end portion, and the accommodating cavity is arranged in the inner wall portion.

[0017] As a preferred technical solution of the present utility model, the inner wall portion includes the inner wall component portion.

[0018] As a preferred technical solution of the utility model, the limiting portion is an elliptical protrusion formed integrally on the outer circumference of the end through hole;

[0019] The boss portion is a raised platform arranged on the outer periphery of the limiting portion.

[0020] As a preferred technical solution of the present utility model, the outer surface of the connecting portion is a connecting thread.

[0021] The beneficial effects of the utility model are as follows: the syringe of the utility model simplifies the manufacturing process and improves production efficiency; it is made of an integrated structure, thereby avoiding the waiting time caused by the use of adhesive and accelerating the manufacturing speed. Accordingly, due to the use of integrated manufacturing, the situation in which the consistency caused by assembly cannot be guaranteed is avoided, and high precision is achieved; the precision deviation caused by the glass tube is avoided; and the situation in which the precision of the syringe is reduced due to the corrosion of the seal by chemical reagents and the like is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a partial structural schematic diagram of the utility model;

[0024] Figure 3 It is an overall schematic diagram of the present invention;

[0025] In the figure: 1, syringe body; 11, accommodating chamber; 2, end portion; 21, limiting portion; 22, boss portion; 23, connecting portion; 24, inner wall component portion; 25, inner wall portion. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example

[0028] like Figure 1-3 As shown, this embodiment provides a high-precision syringe, including a syringe body 1 and an end portion 2, wherein the syringe body 1 and the end portion 2 are made in one piece. Preferably, the syringe body 1 and the end portion 2 are made in one piece of Ultem or PPSU.

[0029] Specifically, one end of the syringe body 1 is the end portion 2, and one end of the end portion 2 is the connecting portion 23, wherein the connecting portion 23 and its top end are the limiting portion 21, and the outer side of the limiting portion 21 is the boss portion 22; specifically, the limiting portion 21 is an elliptical raised block integrally formed on the outer periphery of the through hole of the end portion 2, which is used to fix the sealing ring placed in the mounting hole to prevent the sealing ring from moving in the mounting hole, resulting in the misalignment of the hole of the syringe and the mounting hole, causing the problem of pressure build-up; the boss portion 22 is a raised platform arranged on the outer periphery of the limiting portion 21, in order to ensure that the contacted seal is pressed flat, prevent the sealing ring from being squeezed and deformed on one side when placed and rotated, affecting the seal, and improve the durability of use.

[0030] The syringe body 1 contains a receiving chamber 11, wherein the receiving chamber 11 has an inner wall component 24 near the end 2, and the receiving chamber 11 is arranged in the inner wall component 25. The inner wall component 25 includes the inner wall component 24, which constitutes a complete inner wall to form the receiving chamber 11. Preferably, the inner wall component 24 has an inclined surface with an inclined angle in this embodiment, and its cross section forms a cone, which can better discharge bubbles. After the syringe is filled with liquid, bubbles will float on the top of the syringe, and the inclined surface will gather these bubbles together and discharge them from the top of the cone. Another advantage of the tapered design is that the tolerance is better when the installation is not vertical.

[0031] Regarding the accommodating cavity 11, compared with the glass tube in the prior art, the conventional glass tube has poor control over the tolerance of the inner and outer diameters, and often has problems of one section being thicker and the other thinner, and there are also problems of bubbles inside the glass. If the bubbles are on the inner surface wall, they will scratch the sealing ring and cause leakage. However, the accommodating cavity 11 of the syringe tube produced by the integrated molding machine can be well controlled in precision, without the problem of uneven thickness, and the material will not produce bubbles during the processing.

[0032] The outer surface of the connecting portion 23 is a connecting thread, specifically an integrated thread. The integrated thread design does not require additional component processing and assembly to achieve the fixation and installation of the syringe.

[0033] This embodiment also provides a method for manufacturing a high-precision syringe, which, as an optional method for manufacturing the syringe in this embodiment, includes the following steps:

[0034] Step S1, preparing raw materials, Ultem materials or PPSU materials;

[0035] Step S2, manufacturing a syringe;

[0036] Step S3, completing the manufacture of the syringe.

[0037] In step S2, manufacturing of the syringe includes one of injection molding, CNC machining or 3D printing.

[0038] When using injection molding, the mold needs to be manufactured first.

[0039] The syringe of the utility model simplifies the manufacturing process and improves production efficiency; it is made of an integrated structure, avoids the waiting time caused by the use of adhesive, and speeds up the manufacturing speed. Correspondingly, due to the use of integrated manufacturing, the situation that the consistency caused by assembly cannot be guaranteed is avoided, and high precision is achieved; the precision deviation caused by the glass tube is avoided; and the situation that the accuracy of the syringe is reduced due to the corrosion of the sealing part by chemical reagents and the like is avoided.

[0040] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of protection claimed by the utility model. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high-precision syringe, characterized in that: The invention comprises a syringe body (1) and an end portion (2), wherein: The syringe body (1) and the end portion (2) are made in one piece; the syringe body (1) and the end portion (2) are made in one piece of Ultem or PPSU; one end of the syringe body (1) is the end portion (2), and one end of the end portion (2) is the connecting portion (23), wherein: The connecting portion (23) has a top end which is a limiting portion (21), and an outer side of the limiting portion (21) is a boss portion (22); The syringe body (1) has a receiving chamber (11) inside, wherein: The accommodating cavity (11) has an inner wall component (24) near the end (2), and the accommodating cavity (11) is arranged in the inner wall component (25).

2. A high-precision syringe according to claim 1, characterized in that: The inner wall portion (25) includes the inner wall component portion (24).

3. A high-precision syringe according to claim 1, characterized in that: The limiting portion (21) is an elliptical protrusion integrally formed on the outer circumference of the through hole at the end portion (2); The boss portion (22) is a raised platform arranged on the outer periphery of the limiting portion (21).

4. A high-precision syringe according to claim 1, characterized in that: The outer surface of the connecting portion (23) is a connecting thread.

Images