JPS6125802Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a drip tube with an air supply mechanism. More specifically, the present invention relates to a drip tube for connecting one end of a drip tube to a rubber plug at the lower end of a medical drip bolt, which has a mechanism for supplying air into the drip bolt.

[Prior art]

Infusion tubes, which have been conventionally used as medical instruments, are usually disposable and are therefore made of inexpensive materials such as synthetic resins. In addition, the needle of the drip tube must have a thin and sharp tip so that it can be easily inserted into the rubber stopper at the bottom of the drip bolt, and it must also have an infusion hole and an air supply hole that communicate with the cavity in the body. Therefore, there is a problem that the strength, especially in the bending direction, is not sufficient.

On the other hand, when inserting the needle into a rubber stopper, a strong force is applied in the direction of the needle, but depending on the hardness of the rubber stopper, it may be difficult for the needle to insert immediately.

[Purpose of invention]

The present invention was developed to solve the above-mentioned problems, and has a high strength needle, is easy to insert into a rubber stopper, and is easy to supply and shut off air. The aim is to provide a drip tube that can be used.

[Structure of the idea]

In order to achieve such a purpose, the infusion tube of the present invention has a bottomed cylindrical transparent body having an opening at the upper end and a tube connecting part at the lower end, and is fitted into the opening. The needle part has a base part and is integrally molded from synthetic resin, and the needle part has a wall surface forming a hollow part with a semicircular cross section and a solid part with a semicircular cross section, and the needle part has a wall surface forming a hollow part with a semicircular cross section, An air supply hole is bored in the part from the tip of the needle part to the base part, and the air supply hole communicates with an air intake port that opens to the outside near the base part, and a check valve and a filter are installed in the air intake port. A cap for sealing the air intake port is formed integrally with the needle portion, a rib is formed along the needle portion on the flat surface of the solid portion, and a cap is provided on the base portion radially outwardly. A structural feature is that a protruding finger rest is provided.

[Embodiment]

Next, the drip tube of the present invention will be explained with reference to the drawings.

FIG. 1 is a partially cutaway side view showing an embodiment of the drip tube of the present invention, FIG. 2 is a perspective view of essential parts showing the needle of the drip tube shown in FIG. 1, and FIG. 3 is the same as that shown in FIG. 1. X-X
4 is an enlarged sectional view showing another embodiment of the needle portion according to the present invention; FIG. 5 is an enlarged sectional view showing an embodiment of the air supply port in the drip barrel of the present invention; FIG. 6 is a perspective view of the check valve shown in FIG. 5.

As shown in FIGS. 1 and 2, the infusion tube of the present invention has a bottomed cylindrical body 1 having an opening at the upper end, and a tubular needle having a base 26 fitted into the opening of the body 1. It consists of part 2. A hollow portion 4 is formed in the body portion 1, and the hollow portion 4 includes a hollow portion 5 of the needle portion 2 and a hole 6 of the tube connecting portion 3 provided at the bottom of the body portion 1.
are in communication with each other.

In addition, in FIGS. 1 and 2, 7 is an air supply hole bored from the tip of the needle part 2 to the base part 26,
Reference numeral 8 denotes a finger grip portion that serves as a hand when inserting the drip tube 9 into the rubber stopper of the drip bolt 10.

As shown in FIG. 3, the distal end side of the needle portion 2 is composed of a wall surface 12 surrounding a hollow portion 5 having an approximately semicircular cross section, and a solid portion 13 having a semicircular cross section as well. The air supply hole 7 is bored therein. The wall surface 12 is notched near the tip of the needle portion 2, as shown in FIGS. 1 and 2. The tip of the solid portion 13 is pointed in a substantially semi-conical shape.

In FIGS. 1 to 3, a rib 15 having a dogleg-shaped cross section is provided that extends linearly along substantially the center line of the flat surface 14 of the solid portion 13 of the needle portion 2.

Such a rib 15 improves the strength of the needle part 2, and also serves as a guide when inserting the needle part 2 into the rubber stopper 11, making it easy to insert the needle part 2 into the rubber stopper 11. It has a great effect. Further, since such ribs 15 protrude toward the hollow portion 5 side, resistance when inserting the needle portion 2 into the rubber stopper 11 is not increased.

Since the needle part 2 is integrally formed from synthetic resin, it can be manufactured at low cost, and together with the formation of the ribs 15, the whole is extremely strong.

Note that the ribs in the present invention are not limited to those shown in FIG. 3; for example, as shown in FIG. 4, in addition to a central rib 6 having the same shape as the rib 15 in FIG. Ribs on both sides along the edge 1
7 may be formed. This further increases the strength of the needle portion 2, making it easier to insert the eyelash immediately.

It is preferable that the tips of each of the ribs 15, the central rib 6, and the side ribs 17 are all smoothly continuous with the flat surface 14, and furthermore, it is preferable that each edge angle 15a is sharp. This facilitates the operation of inserting the needle portion 2 into the rubber stopper 11.

FIG. 5 is a sectional view showing an example of an air intake portion provided at the base 26 of the air supply hole 7 shown in FIG. For example, a check valve 19 having the shape shown in FIG.
is fixed together with the filter 20 by a retainer ring 21.

The check valve 19 is made of a flexible and elastic material, such as rubber, and its tip 22
Slit 2, which is formed into a flat shape and is always in close contact with the
3 is provided. The check valve 19 is indicated by the fifth arrow A.
It closes under the pressure of the infusion from the direction, and has the function of allowing air to pass in the direction of arrow B when the inside of the drip bolt (10 in Figure 1) becomes negative pressure. Note that 24 in Fig. 5 is used when there is no need to supply air into the IV bolt (for example, when connecting IV bottles in tandem).
This is a cap for sealing the air intake port 18. A knob 25 is provided on the cap 24. Further, the cap 24 is connected to the base 2 of the needle portion 2.
6 and connected by a connecting piece 27.

Next, the drip tube 9 constructed as described above is the first one.
As shown in the figure, the drip tube 28 is inserted into the tube connecting portion 3 and penetrated by the rubber stopper 11 of the drip bolt 10. The infusion fluid in the drip bolt 10 passes through the hollow portion 5, accumulates in the cavity portion 4, and further flows into the drip tube 28. When the cap 24 is removed, when the inside of the drip bolt 10 becomes negative pressure, the air filtered by the filter 20 is sucked into the drip bolt 10 through the air supply hole 7, and dripping is performed smoothly.

[Effect of the invention]

Since the drip tube of the present invention has ribs formed on the flat part of the needle, the strength of the needle is much higher than that of conventional ones. Moreover, since the needle part, including the base and cap, is integrally formed, it is extremely strong and has the remarkable effect of being able to be manufactured at low cost. Furthermore, since the cap is formed integrally with the needle, it is possible to reliably prevent the cap from falling and becoming contaminated. Furthermore, since the air intake port is provided with a check valve, there is an advantage that only air can be smoothly supplied without leaking infusion fluid or the like to the outside.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the drip tube of the present invention, FIG. 2 is a perspective view of essential parts showing the needle of the drip tube shown in FIG. 1, and FIG. 3 is the same as that shown in FIG. 1. X-X
4 is an enlarged sectional view showing another embodiment of the needle portion according to the present invention; FIG. 5 is an enlarged sectional view showing an embodiment of the air supply port in the drip barrel of the present invention; FIG. 6 is a perspective view of the check valve shown in FIG. 5. Main symbols in the drawings: 1: Body, 2: Needle, 3: Tube connection, 4: Cavity, 5: Hollow, 9: Drip tube, 13: Solid, 14: Flat surface, 15: Rib , 16: central rib, 17: ribs on both sides, 18: air intake, 19: check valve, 24: cap,
26: Base.

Claims (1)

[Scope of utility model registration request] It consists of a bottomed cylindrical transparent body having an opening at the upper end and a tube connecting part at the lower end, and a needle part integrally molded from synthetic resin and having a base to be fitted into the opening. , the needle has a wall surface forming a hollow part with a semicircular cross section and a solid part with a semicircular cross section, and an air supply hole extending from the tip of the needle to the base is bored in the solid part. , the air supply hole communicates with an air intake opening to the outside near the base, the air intake is provided with a check valve and a filter, and a cap for sealing the air intake is connected to the needle portion. The drip tube is formed integrally with the solid portion, a rib along the needle portion is formed on the flat surface of the solid portion, and a finger hook portion protruding radially outward is provided on the base portion.