KR200166416Y1 - An injection with fixing apparatus of piston - Google Patents

Abstract

The present invention relates to a syringe equipped with a piston fixing device.

In the conventional syringe, a gap is formed between a rod and a cylinder in which a piston is raised, and is shaken during operation, which causes a lot of errors when injecting or injecting a quantity of liquid. In addition, when sampling and transporting the sample, the cylinder was pressurized during the transportation process and the collected sample liquid was discharged to the outside.

Therefore, the syringe of the present invention is a syringe comprising a cylinder having a nozzle and a flange, a piston which is tightly adhered to the inside of the cylinder and slidingly moved, and a rod having a pressing plate formed at the rear end thereof to advance and retract the piston in the cylinder. A screw end pipe is formed at the upper end of the opening, and a support cap is coupled to the screw end pipe including a rod through hole formed in the cross section of the rod so that the rod passes through the center without any flow. A screw hole is formed in the upper part of the upper end of the corresponding rod.

As such, the present invention can be stably operated without the flow of the piston by the support cap, so that only the correct amount of the injection liquid or the sample can be taken, and the piston is fixed when necessary by the fixing device such as an overstage rod and a sliding fixing plate and a tooth. As a result, the collected sample can be safely moved or stored.

Description

An injection with fixing apparatus of piston

The present invention relates to a syringe. In particular, when using a syringe, the piston can be intruded only in a straight direction without a flow, so that only an accurate amount of injection liquid or a sample can be collected, and a sample is collected after using a syringe. The present invention relates to a syringe equipped with a piston fixing device provided with a device for fixing the piston so that the sample taken by the flow of the piston does not leak out during transportation or storage.

Syringes, as everyone knows, are essential tools for administering medicine into the body or drawing blood from the body for various tests.

Such a conventional syringe is composed of a piston, a cylinder and a syringe needle coupled to the cylinder tip, and the piston pushes out and pulls the cylinder into the cylinder by pushing and pulling a rod installed at the rear of the piston, thereby releasing the injection liquid in the cylinder or sucking external liquid. Will be done.

In particular, a graduation may be formed on the outer circumferential surface of the cylinder so that a certain amount of liquid may be discharged or aspirated.

However, such a conventional syringe has a play formed between the rod and the cylinder for lifting the piston and shakes during operation. Therefore, a lot of errors occur when injecting or injecting a certain amount of liquid.

In addition, when sampling and transporting the sample, such as drawing blood to know the state of health in the body, there was a problem that the sample liquid was released to the outside due to the pressure applied to the cylinder during the transportation process.

The present invention was devised to solve such a conventional closed end, and its purpose is to prevent the piston from flowing during the inlet and out operation so that only an accurate amount of injection liquid or sample can be collected, and a sample is installed to secure the piston. The present invention provides a syringe equipped with a piston fixing device to prevent leakage of a sample taken by the flow of the piston when transporting and storing the same.

1 is an exploded perspective view of the syringe of the present invention,

2a, 2b is a cross-sectional view of the main portion of FIG.

3 is an exploded perspective view according to another embodiment of the present invention,

Figure 4 is an exploded perspective view of the piston rod of Figure 3,

5 is a perspective view of a syringe according to another embodiment of the present invention,

6A, 6B, and 6C are plan views illustrating an operating state of the piston fixing device of FIG. 5;

7A, 7B, and 7C are cross-sectional views illustrating main parts of an operation state of the piston fixing device of FIG. 5.

*** Explanation of symbols for the main parts of the drawing ***

10-Cylinder 12-Nozzle 14-Flange

15c, 15d-Snap-Fit Hole 16-Screw End Tube 17-Support Cap

18-Rod through hole 20-Piston 22-Rod

24-Pressing plate 25-Screw hole 26-Screw part

29-Flange 23a, 23b-Upper body Lower body 36a, 36c-Threaded part

36b, 36d-Screw hole 37-Support cap 45a, 45b-Protrusion

46a, 46b-Sliding fixing plate 47a-Opening hole 47b-Locking hole

47c-2nd locking hole 48-Support pocket 49-Tooth groove

52-Rod 53-Toothed

Means of the present invention for achieving the above object is a cylindrical cylinder having a nozzle at one end thereof and an opposite end thereof being opened and flanges formed at both sides of the opening, a piston that is hermetically adhered to the inside of the cylinder and slidingly moved thereafter. In the syringe formed of a rod formed at the end and the tip is connected to the piston to facilitate the operation of the piston out of the cylinder,

A screw end pipe is formed at an upper end of the opening of the cylinder, and a support cap coupled to the screw end pipe is formed, including a rod through hole having a rod cross section so as to allow the rod to pass through in a central portion. The pressing plate was removed to form a screw in the center of the bottom and a screw hole in the center of the upper end of the corresponding rod to be assembled.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of the syringe of the present invention, Figure 2a, 2b is a cross-sectional view of the main part of FIG.

Reference numeral 10 is a cylinder, 20 is a piston for sliding the inside of the cylinder, 22 is a rod for sliding the piston 20.

The cylinder 10 has a cylindrical shape, and has a nozzle 12 formed at one end thereof, and an opposite end thereof is opened, and flanges 14 are formed at both sides of the opening. And the threaded end pipe 16 of the same diameter is formed in the opening part. The support cap 17 is coupled to the threaded end 16, and a cross-shaped rod through-hole 18 is formed in the center of the support cap 17 such as a cross-sectional shape of the rod 22, and the thread 26 is formed on the inner circumferential surface thereof. Is formed is screwed to the screw end pipe (16).

The piston 20 is a high elastic material such as rubber, which is hermetically adhered to the inner wall surface of the cylinder 10, but is slidingly moved, and is connected to the rod 22 to be sunk operation by the rod 22.

The rod 22 has a cross section that is longer than the cylinder 10 and has a disk-shaped pressing plate 24 formed at an opposite end coupled to the piston 20. The pressing plate 24 is separated from the rod 22, and the threaded portion 26 is formed at the bottom of the pressing plate 24, and a screw hole 25 is formed at the upper end of the rod 22 corresponding thereto. .

At this time, the rod through hole 18 of the support cap 17 is preferably such that the rod 22 can be moved through without play.

When assembling the syringe by such a structure, the piston 20 is inserted into the cylinder 10 with the pressing plate 24 of the rod 22 removed, and then the rod through hole 18 is inserted into the upper end of the rod 22. Fit the support cap (17) in accordance with. Then, the support cap 17 is screwed into the screw end pipe 16 by rotating the support cap 17, and then the screw plate 26 is inserted into the screw hole 25 formed in the upper end of the rod 22. Assemble

In this way, even if the rod 22 is excessively pulled and pushed to push the piston 20, the piston 20 is never released from the cylinder 10 by the support cap 17. In addition, since the clearance between the rod through hole 18 and the rod 22 of the support plate 17 is very fine during the operation of the rod 22, the liquid is discharged to the inside of the cylinder 10 by precise linear movement without flow. Can be performed more precisely. When the piston 20 is separated from the cylinder 10, the piston 20 can be easily separated by disassembling in the reverse order of assembly.

Figure 3 is an exploded perspective view according to another embodiment of the present invention, Figure 4 is an exploded perspective view of the piston rod of Figure 3 is a different structure of the coupling of the support cap and the rod.

As shown in the figure, snap fits 15a and 15b are projected on both sides of the flange 14 of the cylinder 10, and the flanges 29 are formed on both sides of the support cap 37 to form the snap fits 15a. Snap-fit holes 15c and 15d are formed at positions corresponding to the 15b.

In addition, the rod 22 is divided into two bodies as shown in FIG. 4, and a threaded portion 36a is formed at the lower portion of the upper body 23a and a screw hole 36b is formed at the upper portion of the lower body 23b. The lower part of the body also has a threaded portion 36c and a screw hole 36d is formed in the center of the upper surface of the piston corresponding thereto, so that not only one rod 22 is formed by screwing but also coupled to the piston 20. Of course, the rod 22 may be further divided into multiple stages to form a subdivided body.

Looking at the assembly and use of the syringe having such a structure as follows.

First, the upper and lower bodies 23a and 23b separated from each other are screwed together to form one rod 22 by screwing together the threaded portions 36a and 36b, and then the lower threaded portion 36c is screwed into the piston 20. Screw (36c) to the rod 22 and the piston 20 to be a body.

In this state, the piston 20 is inserted into the cylinder 20, and then the rod through hole 38 of the support cap 37 is inserted into the upper portion of the rod 20, and at the same time, the snap fit of both flanges 39 The support caps 37 are fixed by inserting the holes 15c and 15d into the snap feet 15a and 15b formed on the upper surface of the flange 14 of the cylinder 10. Then, the threaded portion 26 of the pressing plate 24 is screwed into the upper threaded hole 25 of the rod 22 to complete the assembly.

The syringe of this structure is convenient when retracting the piston 20 to collect a liquid sample into the cylinder 10 and then store or transport it. That is, since most of the retracted piston 20 is exposed to the outside of the cylinder 10, pressure may be applied to the inside of the cylinder 10 due to external impact during storage or transportation. At this time, the collected sample is easy to be discharged to the outside, in order to prevent this, if one side body 23a of the protruding rod 22 is rotated in the screw release direction, the rod 23b that does not escape the support cap 37 does not rotate. Only the exposed body 23a is rotated so that the screw portion 36a is separated from the screw hole 36b. As the body 23a protruding to the outside of the cylinder 10 is separated as described above, the other body 23b in the interior of the cylinder 10 has no or minimum portion protruding to the outside of the cylinder 10 so that it may be carried or During storage, the probability of external shock or pressure acting on the piston 20 is minimized. Therefore, the sample in the cylinder 10 can be stored or transported safely.

5 is a perspective view of a syringe according to another embodiment of the present invention, which shows a syringe equipped with a fixing device capable of safer storage and transport of a sample in the cylinder 10 as shown.

As shown, sliding fixing plates 46a and 46b are provided at both sides of the flange 14 of the cylinder 10, and teeth 53 are formed vertically around the rod 52.

The sliding fixing plates 46a and 46b have projections 45a and 45b formed on the upper surface of the flange 14, and the projections 45a and 45b are fitted to the sliding fixing plates 46a and 46b. Holes are formed and joined. The fixing holes of the sliding fixing plates 46a and 46b are formed in multiple stages so that the protrusions 45a and 45b are fixed in position. For example, an opening hole 47a which is located inward to open the piston 20 so as to be separated from the cylinder 10, and located in the center portion, can be attached to and released from the cylinder 10. And a secondary locking hole 47c formed in the outer portion and contacting the teeth 53 of the rod 52 to fix the rod 52 so that the rod 52 cannot move. have. There is a section smaller than the diameter of the projections 45a and 45b between these holes and the holes so that the projections 45a and 45b cannot escape the selected position unless a proper force is applied. Each of the holes 47a, 47b and 47c is the same as the diameter of the projections 45a and 45b, so that the holes 47a, 47b and 47c remain fixed without shaking in the received state.

Further, a support pocket 48 into which the end of the flange 14 of the cylinder 10 is inserted is formed below the outer end of the sliding fixing plates 46a and 46b. Accordingly, the sliding fixing plates 46a and 46b are supported by the flange 14 and are slidably movable in a firmly coupled state by the protrusions 45a and 45b. In addition, the tooth groove 49 is formed in the center of the opposite surface of the sliding fixing plate 46a, 46b, that is, the side facing the rod 52, so that the tooth 53 of the tooth groove 49 and the rod 52 are Engagement to fix the operation of the rod 52 and the piston (20).

With this structure, when the piston 20 is inserted into or separated from the inside of the cylinder 10, when the two sliding fixing plates 46a and 46b are opened outward, the opening groove 47a is opened as shown in FIG. 6A and FIG. 7A. The projections 45a and 45b are accommodated. In this case, since the sliding fixing plates 46a and 46b are opened wider than the diameter of the cylinder 10, the piston 20 can be freely inserted and removed.

When the sliding fixing plates 46a and 46b are pushed one step by applying a force, the projections 45a and 45b are forcibly accommodated in the primary locking holes 47b as shown in FIGS. 6b and 7b and the sliding fixing plates 46a and 46b. Becomes narrower than the diameter of the cylinder 10, but the rod 52 passes freely.

In this state, when the sliding fixing plates 46a and 46b are further advanced, the projections 45a and 45b are forcibly accommodated in the secondary opening hole 47a as shown in FIGS. 6C and 7C. At this time, the sliding fixing plate 46a, 46b is completely moved toward the rod 52 so that the teeth 53 of the rod 52 and the tooth groove 49 of the sliding fixing plate 46a, 46b are engaged with each other. Will not be able to move.

When the rod 52 is completely fixed as described above, even if an impact is applied from the outside during transport or storage, the impact is not transmitted to the piston 20, and thus the sample in the collected cylinder 10 is stored in a safe state. .

If the liquid in the collected cylinder 10 is to be ejected, the sliding fixing plates 46a and 46b may be opened in the reverse order.

As described above, the present invention can be stably operated without the flow of the piston by the support cap, so that only the correct amount of the injection liquid or the sample can be collected, and the piston is secured by a fastening device such as an overstage rod and a sliding fixing plate and a tooth. It can be fixed when needed, so that the sample can be safely moved or stored.

Claims (3)

One end has a nozzle 12 and the opposite end is opened, and a cylindrical cylinder 10 having a flange 14 formed on both sides of the opening, a piston 20 which is hermetically adhered to the inside of the cylinder, and slides. In the syringe composed of a rod 22 is formed at the end of the rod 22 and the tip is connected to the piston 20 to facilitate the operation of the piston 20 in and out of the cylinder 10, A screw end pipe 16 is formed at the upper end of the opening of the cylinder 22, and a rod through hole 18 having a rod cross section is formed in the center so that the rod 22 can pass through without shaking. The support cap 17 is coupled to each other, and the pressing plate 24 at the upper end of the rod 22 is separated to form a screw portion 26 at the center of the bottom surface thereof, and a screw hole at the upper center of the rod 22 corresponding thereto. A syringe with a piston fixing device, characterized in that it is formed to form (25) to be assembled. The method of claim 1, Snap-fit 15a, 15b protrudes on both sides of the flange 14 of the cylinder 10, and flanges 29 are formed on both sides of the support cap 37, and snap-fits on the bottom thereof. And (15a) and (15b) to form snap fit holes (15c) and (15d) correspondingly coupled, wherein the rod (22) is separated into at least two or more bodies and the piston fixing device characterized in that it is screwed together. Installed syringe. One end has a nozzle 12 and the opposite end is opened, and a cylindrical cylinder 10 having a flange 14 formed on both sides of the opening, a piston 20 which is hermetically adhered to the inside of the cylinder, and slides. In the syringe consisting of a rod is formed on the end plate 24 and the tip is connected to the piston 20 to facilitate the operation of the piston 20 in the cylinder 10, The teeth 53 are formed on the outer circumferential surface of the rod 52 in a vertical direction, the projections 45a and 45b are formed on the upper surfaces of both flanges 14 of the cylinder 10, and the centers face each other. And a sliding fixing plate 46a and 46b which move horizontally to each other, and the protrusions 45a and 45b are formed in multiple stages on the sliding fixing plate 46a and 46b to fix the rod 52 in stages. A syringe having a piston fixing device formed therein, characterized in that the tooth groove (49) is formed in the center of the opposite surface, respectively.