CN216169223U

CN216169223U - Accurate low disposable syringe that remains of dose

Info

Publication number: CN216169223U
Application number: CN202122433345.4U
Authority: CN
Inventors: 宣亚飞; 王明辉
Original assignee: Anhui Xuanhe Medical Technology Co ltd
Current assignee: Anhui Xuanhe Medical Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-04-05
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a low-residue disposable injector with accurate dosage, which comprises a needle cylinder, wherein the inner cavity of the needle cylinder is connected with a piston in a sliding way, a cavity pressing column is fixedly connected to the outer side of the piston, a cavity abutting rod is fixedly connected to the other side of the cavity pressing column, the piston, the cavity pressing column and the cavity abutting rod are communicated, a sliding column is connected between the cavity pressing column and the cavity abutting rod in a sliding way, an abutting plate is fixedly connected to one end of the sliding column, a chuck is fixedly connected into the inner cavity of the needle cylinder, an extrusion column is fixedly connected to the outer end of the chuck, the compression strength of a medicament in the needle cylinder is enhanced through the piston in a circular truncated cone shape and the accumulation amount of the medicament is reduced, when the piston slides to the bottom of the needle cylinder, most of the accumulation liquid is compressed into the piston and the cavity pressing column, and the extrusion column at the outer end of the chuck extrudes the sliding column to enable the sliding column to slide in the cavity pressing column and the cavity abutting rod, thereby discharging the pressure liquid accumulated in the piston and the cavity pressure column, and reducing the accumulated amount of the medicament.

Description

Accurate low disposable syringe that remains of dose

Technical Field

The utility model relates to the technical field of disposable syringes, in particular to a low-residue disposable syringe with accurate dosage.

Background

An injector is a common medical device. Gas or liquid is primarily drawn or injected with a needle. Syringes may also be used for injection through rubber septa in medical devices, containers, scientific instruments such as in some chromatography. Injecting gas into a blood vessel will cause air embolism. The method of removing air from the syringe to avoid embolism is to invert the syringe, tap it gently, and then squeeze out a little liquid before injecting into the bloodstream.

However, the piston of the injector is usually arc-shaped, and after injection, a part of liquid volume is left in the needle column and cannot be discharged, so that a part of injection is wasted, dosage of some special medicaments needs to be strictly controlled, the plastic syringe can influence the drug effect of the medicaments, and the plastic syringe can influence the actual dosage of the medicaments.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the low-residue disposable injector with accurate dosage, most of the residual medicament is pressed and accumulated in the cavity compression leg after the medicament is injected, and when the piston slides to the bottom of the needle cylinder, the compression leg is pressed against the sliding leg, so that the medicament with pressure is sprayed out of the cavity compression leg, and the residual quantity of the medicament in the needle cylinder is effectively reduced by the mode, and further the waste of the medicament is reduced.

In order to solve the technical problems, the utility model provides the following technical scheme: a low-residue disposable injector with accurate dosage comprises a needle cylinder, a piston is connected in the inner cavity of the needle cylinder in a sliding way, the piston is in a round table shape, one end of the needle cylinder is inserted with a needle column, the outer end of the piston is provided with a medicine discharging mechanism, the medicine discharging mechanism comprises a cavity pressing column, a cavity abutting rod, a liquid leakage hole, a sliding column, an abutting plate, a chuck and an extrusion column, the cavity compression leg is fixedly connected with the outer side of the piston, the cavity support rod is fixedly connected with the other side of the cavity compression leg, the piston, the cavity pressing column and the cavity abutting rod are communicated, the sliding column is connected between the cavity pressing column and the cavity abutting rod in a sliding mode, the butt plate is fixedly connected with one end of the sliding column, the chuck is fixedly connected in the inner cavity of the needle column, the extrusion column is fixedly connected to the outer end of the chuck, and the liquid leakage hole is formed in the outer end of the piston and the outer end of the cavity compression column.

As a preferable technical solution of the present invention, the laxative mechanism further includes a spring and a sealing piece, the spring is sleeved at an outer end of the sliding column, the spring is fixedly connected between the cavity pressing column and the abutting plate, and the sealing piece is fixedly connected to the other end of the sliding column.

As a preferable technical scheme of the utility model, two leakage holes are arranged, and the two leakage holes are respectively symmetrical about the piston and the cavity compression leg.

As a preferred technical scheme of the utility model, the other side of the piston is sleeved with a sliding rod, the sliding rod is connected with the needle cylinder in a sliding manner, the outer end of the needle cylinder is fixedly connected with a needle head, the outer end of the needle cylinder is sleeved with a protective cover, and the needle cylinder is made of glass materials.

As a preferable technical scheme of the utility model, the chuck is circular, a plurality of liquid discharge holes are formed in the inner cavity of the chuck, and the liquid discharge holes are formed in the chuck.

Compared with the prior art, the utility model can achieve the following beneficial effects:

1. through setting up piston and weeping hole, the piston of round platform shape has strengthened the compressive strength of medicament in the cylinder, and then has reduced the volume of staying of medicament, when the piston slides to the bottom of cylinder, the most volume stays the liquid compression to the inside of piston and cavity compression leg, the squeeze column extrusion traveller of chuck outer end simultaneously, make it slide in cavity compression leg and cavity support rod, thereby discharge the pressure liquid of staying in piston and the cavity compression leg, the waste of medicament has been reduced in the effectual volume of staying of reducing the medicament of this kind of mode.

2. Through the cylinder that sets up, the cylinder of glass material compares in traditional plastics material cylinder, can avoid plastics material to cause the pollution to the medicament on the one hand, and on the other hand glass cylinder non-deformable, and then make joining in marriage of medicament in the cylinder the dosage more accurate.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the pin and the hollow rod of the present invention;

fig. 3 is a schematic structural view of the chuck of the present invention.

Wherein: 1. a needle cylinder; 2. a slide bar; 3. a piston; 4. a needle cylinder; 5. a laxative mechanism; 501. pressing the column in the cavity; 502. a cavity support rod; 503. a weep hole; 504. a traveler; 505. a spring; 506. a resisting plate; 507. sealing the sheet; 508. a chuck; 509. extruding the column; 6. a drain hole; 7. a needle head; 8. a protective cover.

Detailed Description

The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

Example (b):

as shown in fig. 1-3, the utility model provides a low-residue disposable syringe with accurate dosage, comprising a syringe 1, a piston 3 connected with the inner cavity of the syringe 1 in a sliding manner, the piston 3 being in a circular truncated cone shape, a needle post 4 inserted at one end of the syringe 1, a medicine discharging mechanism 5 arranged at the outer end of the piston 3, the medicine discharging mechanism 5 comprising a cavity pressure post 501, a cavity resisting rod 502, a leakage hole 503, a sliding post 504, a resisting plate 506, a chuck 508 and an extrusion post 509, the cavity pressure post 501 being fixedly connected with the outer side of the piston 3, the cavity resisting rod 502 being fixedly connected with the other side of the cavity pressure post 501, the piston 3, the cavity pressing column 501 and the cavity resisting rod 502 are communicated, the sliding column 504 is connected between the cavity pressing column 501 and the cavity resisting rod 502 in a sliding manner, the resisting plate 506 is fixedly connected at one end of the sliding column 504, the chuck 508 is fixedly connected in the inner cavity of the needle column 4, the extrusion column 509 is fixedly connected to the outer end of the chuck 508, and the liquid leakage hole 503 is formed in the outer ends of the piston 3 and the cavity compression column 501;

when the piston 3 slides to the bottom of the syringe 1, most of the accumulated liquid between the bottom of the syringe 1 and the piston 3 is compressed to the insides of the piston 3 and the cavity compression leg 501, the cavity resisting rod 502 extrudes the accumulated medicament inside the syringe 4 while the cavity resisting rod 502 slides inside the syringe 4, so that part of the medicament is extruded and discharged, and when the cavity resisting rod 502 slides to a certain position, the resisting plate 506 connected with the sliding column 504 inside the cavity resisting rod 502 is extruded by the extruding leg 509 at the outer end of the chuck 508, so that the pressure liquid accumulated in the piston 3 and the cavity compression leg 501 is discharged, thereby effectively reducing the accumulated amount of the medicament and simultaneously reducing the waste of the medicament.

In other embodiments, the laxative mechanism 5 further includes a spring 505 and a sealing sheet 507, the spring 505 is sleeved on the outer end of the sliding column 504, the spring 505 is fixedly connected between the cavity pressing column 501 and the abutting plate 506, and the sealing sheet 507 is fixedly connected to the other end of the sliding column 504;

when the supporting plate 506 connected with the outer end of the sliding column 504 is not extruded by the extruding column 509, the spring 505 is in an expansion state, so that the sealing sheet 507 at the other end of the extruding column 509 seals the groove hole of the cavity pressing column 501, along with continuous compression of medicaments, the pressure of the liquid medicaments in the piston 3 and the cavity pressing column 501 is continuously increased, when the piston 3 slides to the bottom of the needle cylinder 1, the extruding column 509 extrudes the sliding column 504, so that the sealing sheet 507 is separated from the cavity pressing column 501, further compressed medicaments are ejected, medicaments containing pressure can be ejected quickly, and the retention amount of the medicaments is effectively reduced.

In other embodiments, there are two liquid leakage holes 503, and the two liquid leakage holes 503 are respectively symmetrical with respect to the piston 3 and the cavity compression leg 501;

the two weep holes 503 increase the amount and speed of the entrapped agent being pressed in, resulting in a faster injection.

In other embodiments, the other side of the piston 3 is sleeved with a slide bar 2, the slide bar 2 is connected with the needle cylinder 1 in a sliding manner, the outer end of the needle column 4 is fixedly connected with a needle head 7, the outer end of the needle column 4 is sleeved with a protective cover 8, and the needle cylinder 1 is made of glass material;

the slide bar 2 that sets up is convenient for promote piston 3 and slides in cylinder 1, and injection is accomplished to the medicament that syringe needle 7 can jet out, and when protecting cover 8 protected syringe needle 7, avoid the mistake to touch, and glass material's cylinder 1 is compared in traditional plastics material cylinder 1, can avoid plastics material to cause the pollution to the medicament on the one hand, 1 non-deformable of on the other hand glass cylinder, and then make joining in marriage of 1 interior medicament of cylinder more accurate.

In other embodiments, the chuck 508 is circular, and the inner cavity of the chuck 508 is provided with a plurality of liquid discharge holes 6;

the plurality of discharge holes 6 increases the speed of medicament discharge from the syringe 1, thereby allowing for more rapid medicament injection.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A low residue, single use syringe with accurate dosage comprising a barrel (1), characterized in that: the inner cavity of the needle cylinder (1) is connected with a piston (3) in a sliding manner, the piston (3) is in a circular truncated cone shape, one end of the needle cylinder (1) is inserted with a needle column (4), the outer end of the piston (3) is provided with a medicine discharging mechanism (5), the medicine discharging mechanism (5) comprises a cavity pressing column (501), a cavity abutting rod (502), a liquid leaking hole (503), a sliding column (504), a abutting plate (506), a chuck (508) and an extrusion column (509), the cavity pressing column (501) is fixedly connected to the outer side of the piston (3), the cavity abutting rod (502) is fixedly connected to the other side of the cavity pressing column (501), the piston (3), the cavity pressing column (501) is communicated with the cavity abutting rod (502), the sliding column (504) is slidably connected between the cavity pressing column (501) and the cavity abutting rod (502), and the abutting plate (506) is fixedly connected to one end of the sliding column (504), chuck (508) fixed connection in the inner chamber of needle post (4), extrusion post (509) fixed connection in the outer end of chuck (508), weeping hole (503) are seted up in piston (3) with the outer end of cavity compression leg (501).

2. A dosage accurate, low residue, single use syringe according to claim 1, wherein: the laxative mechanism (5) further comprises a spring (505) and a sealing piece (507), the spring (505) is sleeved at the outer end of the sliding column (504), the spring (505) is fixedly connected between the cavity pressing column (501) and the abutting plate (506), and the sealing piece (507) is fixedly connected to the other end of the sliding column (504).

3. A dosage accurate, low residue, single use syringe according to claim 1, wherein: the number of the liquid leakage holes (503) is two, and the two liquid leakage holes (503) are respectively symmetrical about the piston (3) and the cavity compression leg (501).

4. A dosage accurate, low residue, single use syringe according to claim 1, wherein: the other side of piston (3) has cup jointed slide bar (2), slide bar (2) with sliding connection between cylinder (1), just the outer end fixedly connected with syringe needle (7) of stylar (4), protecting cover (8) has been cup jointed to the outer end of stylar (4), just cylinder (1) adopts the glass material to make.

5. A dosage accurate, low residue, single use syringe according to claim 2, wherein: the chuck (508) is circular, and liquid discharge hole (6) have been seted up to the inner chamber of chuck (508), liquid discharge hole (6) are equipped with a plurality ofly.