JP3189330U - Valve body and needleless mixed injection pipe - Google Patents

Abstract

The present invention provides an excellent valve body that does not leak when a needleless syringe barrel is inserted or removed, and that does not deform during heat treatment of a protective cap, and a needleless T-shaped tube that houses the valve body.
A valve body 11 is formed of a cylinder, and an upper surface 13 has a concave surface 13a. A concentric circular convex portion 12 is formed at the center of the upper surface 13. The upper surface of the circular convex portion 12 has a concave surface 12a. An outwardly curved surface 14 a is formed on the lower surface 14 of the valve body 11, and the lower surface 14 has a concentric recess 15 at the center. Furthermore, the upper surface 13 and the lower surface 14 are arched and parallel. On the other hand, the bottom surface of the valve body storage portion of the needleless T-shaped tube is inclined so as to be lowered toward the central portion.
[Selection] Figure 1

Description

The present invention relates to a valve body and a needleless mixed injection tube containing the valve body, and more specifically, there is a risk of liquid leakage or the like when a drug solution or the like is injected with a needleless syringe (hereinafter also referred to as a syringe). And there is no risk of liquid leakage when the ampule adapter connected to the needleless syringe is inserted or removed, and there is no deformation during the heat treatment of the protective cap, and the needleless T for storing it. It relates to the character tube.

A conventionally known mixed injection member for injecting a chemical solution or the like, for example, a needleless mixed injection tube, that is, a split valve storage portion of a needleless T-tube (referred to as a valve body storage portion in the present application and indicated by reference numeral 17) 10 is provided. As shown in FIG. 6, a split valve (or rubber button) 8 such as a cylindrical rubber member is built in, and the shape of the split valve 8 is usually circular and has various structures. It has an insertion part 9 for a syringe barrel in the center. FIG. 7 shows a conventional split valve and a needleless T-shaped tube. FIG. 7A shows a free split valve 8a and a conventional needleless T-shaped tube 1, and FIG. The figure shows a split valve shape 8b when the split valve 8a is compressed and stored in the split valve storage portion 10. When the split valve 8a is compressed and stored in the split valve storage portion (hereinafter also referred to as a storage portion) 10 of the needleless T-tube 1, the outer periphery is subjected to compressive stress toward the central portion. Like 8b, the upper surface 8e and the lower surface 8h bulge outward. Further, as shown in FIG. 7c, when the shape of the split valve 8c is such that the central portions of the split valve 8c are inwardly facing each other toward the inside, the upper surface has a concave portion 8f and the lower surface 8g has a concave portion. When the split valve 8c is compressed and stored in 1, the upper surface 8e and the lower surface 8h of the split valve 8d swell outward as shown in FIG.

  FIG. 8 shows the structure of a conventional needleless T-tube 1, and in particular, the bottom surface 24 of the storage unit 10 has a horizontal surface 20. As shown in FIG. 9, when the split valve 8a is compressed and stored in the conventional needleless T-shaped tube 1, the upper surface 8e and the lower surface 8h of the compressed storage split valve 8b are stored in a shape bulging outward. At this time, the upper surface 8e of the split valve 8b rises, so that the upper surface 4a of the protective cap 4 also expands outward, and the lower surface 8h of the compression storage split valve 8b also expands and stores outward. On the other hand, as shown in FIG. 1 and FIG. 2 of a patent publication (Patent Document 1) published before the present application, a seal valve body (referred to as a split valve in the present application) 11 is compressed and accommodated in a mixed injection pipe. The shape is shown, and further, the shape of the seal valve body 11 is shown in FIGS. 2 (a) to 2 (d). The seal valve body 11 has an inner portion 19 and an outer portion 20 formed in an arched concave shape at the center, and the outer diameter 17 of the seal valve body 11 is larger than the inner diameter of the cylindrical wall portion 207. It is also shown that the shape of the outer diameter 17 is enlarged to form a shape 18 that bulges outward (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2003-325675 (Patent Gazette, page 4, paragraphs 0031 to 0036, FIGS. 1 and 2)

  However, the split valve and the needleless T-shaped pipe as shown in FIGS. 7 and 8 are difficult to compress and house, and not only the workability is poor, but the split valves 8a and 8c are both the upper face 8e and the lower face 8h of the split valve. As a result, the insertion resistance of the syringe barrel into the slit increases, which makes it difficult to insert the syringe barrel. Further, since the protective cap is deformed (swells in the direction of the central portion), there is a problem that the protective cap is further deformed by heat treatment during sterilization treatment or the like. Further, as shown in FIG. 9, since the bottom surface 24 of the split valve storage 10 is a horizontal surface, when the split valve 8b is compressed and stored, a gap 21 is formed between the bottom surface 24 and the split valve 8h. As a result, the compressive stress acts not only upward but also downward, causing liquid leakage and the like, and since it is compressed and stored, the protective cap 4 swells during heat treatment.

Furthermore, the sealing valve body as described in Patent Document 1 as described above, so-called valve body 11, has an inner peripheral portion 18 and an outer peripheral portion 20 formed in the shape of an arch-shaped recess, respectively. Is compressed in the thickness direction and is compressed in the inner diameter direction by the cylindrical wall portion 207. As a result, a large compressive stress acts on the central portion of the valve body 11. As a result, liquid is inserted and removed when the syringe or needleless co-injector is inserted. Although leakage can be prevented, the range of syringe diameters to be inserted is limited. After inserting the syringe, if the syringe is shaken back and forth, left and right, or inserted obliquely, there is a risk of liquid leakage. There was a problem that was not. Although it is conceivable to increase or decrease the diameter of the valve body with respect to the dimensions of the T-tube, it becomes difficult to store when the diameter of the valve body is increased, and the pressure resistance performance is inferior when the diameter is decreased. there were.

Therefore, the inventors have studied the above-mentioned problems in various ways, and the shape of the conventional split valve (referred to as a valve body in the present application) as shown in FIG. 7 and the structure of the conventional needleless T-shaped tube. By examining through trial and error, the shape of the valve body is specified, and the structure of the needleless T-shaped tube, in particular, the bottom surface of the valve body storage part is aligned with the lower surface of the valve body, so that liquid leakage does not occur. It has been found that an excellent valve body without deformation of the protective cap at the time of heat treatment and a needleless T-shaped tube for housing it can be obtained without fear of liquid leakage at the time of insertion or removal of the syringe. I came up with a device.

Therefore, the problem to be solved by the present invention is that there is no risk of liquid leakage or the like when injecting a drug solution or the like with a needleless syringe, and the liquid at the time of insertion or removal of the ampule adapter connected to the needleless syringe It is another object of the present invention to provide an excellent valve body that is free from deformation during heat treatment of a protective cap and a needleless T-shaped tube that houses the valve body without fear of leakage.

The above-mentioned problems of the present invention are achieved by the following devices.

(1) The cylindrical portion has a concentric circular convex portion at the central portion of the upper surface of the cylindrical portion, and the lower surface of the cylindrical portion has a concentric curved surface portion. In the valve body having an insertion part of a needleless syringe at the center part, the upper surface and the surface of the circular convex part on the upper surface have a concave surface inclined toward the center part, and the lower surface is in the center part direction and outward. A valve body having an inclined convex surface.
(2) The slope of the concave surface inclined toward the central portion of the upper surface of the cylindrical portion of the valve body and the slope of the convex surface inclined toward the central portion and outward of the lower surface are arched and substantially parallel to the thickness. The valve element according to the above item 1, wherein
(3) The size of the valve body before being compressed and housed in the needleless T-shaped tube excludes the circular convex portion on the upper surface of the cylindrical portion of the valve body with respect to the inner diameter of the housing portion of the T-shaped tube. 2. The valve element according to item 1, wherein the upper surface portion has a horizontal size.
(4) In a needleless T-shaped tube comprising a main pipe and a side pipe having a valve body storage section and having an inflow hole communicating with the main pipe on the bottom surface of the storage section, the bottom surface of the valve body storage section is in the center direction. A needleless T-shaped tube which is inclined so as to be lowered.
(5) In a needleless T-shaped tube in which a protective cap having a circular hole at the center is put on the opening of the side tube, the circular convex portion of the valve body compressed and accommodated in the valve body accommodating portion of the side tube There is no step at the boundary between the surface of the protective cap fitted and covered with the surface of the circular convex portion of the valve body, and the surface of the protective cap and the surface of the circular convex portion of the valve body are in the central direction. The needleless T-shaped tube according to claim 4, wherein the needleless T-shaped tube is inclined so as to be lowered and has a concave surface.

  The valve body according to (1) of the present invention has a concave surface in which the upper surface and the surface of the circular convex portion on the upper surface are inclined toward the central portion, and the lower surface is inclined toward the central portion and outward. By having the convex surface, it is possible to obtain an excellent effect of obtaining a valve body that does not leak a chemical when the needleless syringe is inserted or removed in a state where the valve body is compressed and stored in the storage portion of the T-shaped tube. . Further, when the upper surface of the storage state is horizontal and the protective cap is put on, the upper surface of the protective cap and the surface of the circular convex portion are smoothly inclined toward the central portion while being in close contact with the ceiling surface of the protective cap. A concave surface is formed, so that there is not only a harmful effect such that a part of the drug solution leaked at the time of removing the needleless syringe collects and scatters in the concave portion, and it has an excellent effect that the surface can be easily wiped off. is there.

The valve body according to (2) of the present invention is the split valve according to the first item, wherein the concave surface is inclined in the central portion direction of the upper surface of the cylindrical portion of the split valve and the central portion direction of the lower surface. In addition, the inclination of the convex surface inclined outward is arched and substantially parallel to the thickness, so that the stress of the compressed and stored valve element acts toward the center and the bottom surface, and toward the top surface. No stress is applied. Therefore, the deformation stress in the lower surface direction is such that the bottom surface inclined so that the bottom surface of the storage portion becomes lower in the central portion direction, the convex surface inclined in the central direction and the outward direction formed by the lower surface of the valve body, and the T-shaped tube. It is offset by the side frictional resistance. This means that there is no stress in the upper surface direction even after deformation, so that an excellent effect is obtained that there is no deformation of the upper surface of the protective cap even after heat treatment.

The compression storage valve body according to (3) of the present invention is the valve body according to the first aspect, wherein the size of the valve body before being compressed and stored in the needleless T-shaped tube is The upper surface portion excluding the circular convex portion on the upper surface of the cylindrical portion of the valve body is sized to be horizontal with respect to the inner diameter of the storage portion, so that it can be in close contact with the horizontal portion on the lower surface of the protective cap. As a result, since no deformation stress is applied to the lower surface of the protective cap, the protective cap does not rise, and therefore, there is an excellent effect that there is no fear of liquid leakage due to the deformation stress.

The needleless T-shaped tube according to (4) of the present invention comprises a main tube and a side tube having a valve body storage portion, and has a needleless T-shape having an inflow hole communicating with the main tube on the bottom surface of the storage portion. In the pipe, since the bottom surface of the valve body storage portion is inclined so as to be lowered in the central portion direction, it can be stored in close contact with the convex surface inclined in the central portion direction and outward direction of the lower surface of the valve body. . Therefore, since no useless deformation stress is applied, there is an excellent effect that there is no liquid leakage.

The needleless T-shaped tube according to (5) of the present invention is the needleless T-shaped tube according to the fourth item, wherein the protective cap has a circular hole in the center portion at the opening of the side tube. In the needleless T-shaped tube covered with the valve, the surface of the protective cap and the circular convex portion of the valve body which are fitted and fitted to the circular convex portion of the valve body compressed and stored in the valve body storage portion of the side pipe There is no step at the boundary with the surface of the tube, and the surface of the protective cap and the surface of the circular convex portion of the valve body are inclined and concave so as to be lowered toward the central portion, so that the syringe barrel or syringe barrel It has an excellent effect that there is no fear of liquid leakage at the time of insertion or removal of the ampule adapter connected to the.

It is sectional drawing which shows the valve body of this invention, a of FIG. 1 is sectional drawing which looked at the slit from the thickness direction, and b of FIG. 1 is the valve body which looked at the slit from the width direction. It is sectional drawing which shows that the upper surface and lower surface of the valve body of this invention are curved surfaces. It is sectional drawing which shows the shape of the valve body which carried out compression accommodation of this invention. 3 is a sectional view of the slit as viewed from the thickness direction, and b of FIG. 3 is a sectional view of the slit as viewed from the width direction. It is sectional drawing which shows the inclination of the bottom face of the storage part of the T-shaped tube of this invention. It is sectional drawing which shows the place which covered the side pipe of b of FIG. 3 with the cap. It is a notch perspective view which shows the T-shaped tube which compressed and accommodated the conventional split valve. It is sectional drawing which shows the shape of the place where another conventional split valve was compressed and accommodated in the T-shaped tube. It is sectional drawing which shows the conventional T-shaped tube. It is sectional drawing which shows the T-shaped tube which accommodated the conventional split valve.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited thereto. When it is described as “valve element” in the specification of the present invention, it means a valve element having a shape or structure in a state before being compressed and accommodated in the valve element accommodating portion of the T-shaped tube. It is described as “compression storage valve body”, and they are used separately. The “cylindrical portion” described in the claims and specifications of the utility model registration of the present invention refers to a so-called disk-shaped portion having a height of the peripheral wall shorter than the diameter of the valve body. Further, the “needleless syringe” described in the claims of the utility model registration of the present invention and in the description etc. is used to include an ampule adapter connected to the needleless syringe. The present invention has a cylindrical portion and a concentric circular convex portion at a central portion of the upper surface of the cylindrical portion, a concentric curved surface portion on the lower surface of the cylindrical portion, and the circular convex portion. In the valve body having the insertion part of the needleless syringe at the center of the upper surface, the upper surface and the surface of the circular convex portion of the upper surface have a concave surface inclined toward the central portion, and the lower surface is in the central portion direction and outward. It has an inclined convex surface.

Further, according to the present invention, the concave slope inclined toward the central portion of the upper surface of the cylindrical portion of the valve body and the convex slope inclined toward the central portion and outward of the lower surface are arched and have a thickness relative to the thickness. It is characterized by being substantially parallel.

1 and 2, the valve body of the present invention will be described. FIG. 1 a shows the shape of the valve body and is a cross-sectional view of the slit viewed from the thickness direction, and FIG. 1 b shows the slit. It is the valve body seen from the width direction. FIG. 2 is a cross-sectional view showing that the upper and lower surfaces of the valve body of the present invention are curved surfaces. 1A and 1B, the valve body 11 is formed of a cylinder, that is, a disk-shaped portion, and the upper surface 13 is a concave surface 13a inclined toward the central portion. A concentric circular convex portion 12 is formed at the center of the upper surface 13. Further, the upper surface of the circular convex portion 12 has a concave surface 12a. Further, a slit 25 is formed in the central portion of the valve body 11 so as to penetrate from the upper surface 13 to the lower surface 14. On the other hand, an outwardly curved surface 14 a is formed on the lower surface 14 of the valve body 11. Furthermore, the lower surface 14 has a concentric recess 15 at the center. The shape of the slit 25 has a wall parallel to the downward direction from the upper surface in a cross section viewed from the vertical direction (a in FIG. 1), and is tapered near the lower surface. The cross section viewed from the width direction (b in FIG. 1) has a mortar-shaped inclined wall 22 that narrows from the upper surface to the lower surface.

As further apparent from Figure 2, valve body 11 has an upper surface 13 has a curved _{L 1,} also the lower surface 14 has a curved _{L 2,} these curved surfaces _{L 1} and _{L 2} are as parallel Yes. That is, it has an arch shape having the same polarity radius. However, the pole radius may vary depending on the degree of compression. As shown in FIG. 3, the size of the valve body 11 before being compressed and stored in the needle-less T-shaped tube 1 is such that the cylindrical portion of the valve body has an inner diameter of the valve body storing portion 17 of the T-shaped tube. The upper surface portion of the upper surface excluding the circular convex portion is dimensioned to be horizontal under stress. That is, since the valve body 11 is compressed and stored in the T-shaped tube 1, the valve body 11 is formed to be slightly larger than the inner diameter of the side tube 3 of the T-shaped tube 1 and stored. Specifically, the inner diameter of the T-tube 1 is usually 10.0 mm to 10.7 mm, preferably 10.2 mm to 10.5 mm. Moreover, the external shape of the valve body 11 is 10.7 mm-11.3, Preferably, if an example is given, the internal diameter of the T-tube 1 will be 11 mm with respect to 10.3 mm. FIG. 3 is a cross-sectional view showing the shape of the valve body 11a compressed and housed in the T-shaped tube 1. FIG. 3A is a cross-sectional view of the slit 25 as viewed from the thickness direction. Since the valve body 11a is compressed and stored, the slit 25 forms a single line with both walls in close contact with each other. FIG. 3 b is a cross-sectional view of the slit 25 as viewed from the width direction. The slit 25 is narrow because the space between the slopes 22 is compressed. Due to the shape of the slit 25 of the valve body 11a compressed and stored in this manner, a large pressure resistance and liquid leakage resistance performance is exhibited particularly in the swing range after the ampule adapter connected to the syringe barrel is inserted obliquely. In particular, the allowable swing range can be used within a wide range of 2 mm to 4.5 mm. In addition, there is an excellent effect that the deformation stress of the compression storage valve body 11a becomes inward, the insertion resistance of the syringe barrel is reduced, and the syringe barrel can be easily inserted. The T-shaped tube 1 shown in FIG. 3 relates to the T-shaped tube of the present invention shown in FIG. 4 described later, and an inclined surface 23 is formed on the bottom surface of the valve body storage portion 17. Since the inclined surface 23 is formed in this manner, the valve body can be easily stored, so that not only the workability during storage is improved, but also the lower surface 14 of the valve body and the inclined surface 23 that is the bottom surface of the storage portion are provided. The valve body 11a is in close contact with each other and the repulsive force is applied not only in the tightening direction but also in the pressure resistance direction. Since there is no gap as compared with the conventional T-shaped tube, there is an excellent effect of preventing liquid leakage and the like.

The needleless T-shaped tube 1 of the present invention is composed of a main tube 2 and a side tube 3 having a valve body storage portion 17, and has a bottom surface 23 of the storage portion 17 having an inflow hole communicating with the main tube. The bottom surface 23 of the valve body storage portion 17 is inclined so as to be lowered toward the center portion. FIG. 4 is a cross-sectional view of a T-tube of the present invention. The T-shaped tube 1 includes a main tube 2 and a side tube 3, and the side tube 3 has a valve body storage portion 17. The bottom surface of the valve body storage portion 17 is formed with an inclined surface 23 that is inclined downward toward the center portion. On the other hand, as shown in FIG. 1, an outwardly curved surface 14 a is formed on the lower surface 14 of the valve body 11, and when such a valve body 11 is compressed and stored in the valve body storage portion 17, The outwardly curved surface 14a and the bottom surface 23 of the valve body storage portion 17 are stored in close contact with each other without a gap. This means that the compression-accommodated valve body or the compression-accommodation valve body 11a generates a deformation stress in the center direction and downward (lower surface direction), and no upward deformation (upper surface direction). This downward deformation stress is offset by the frictional resistance of the inclined bottom surface 23, the valve body 11 a and the wall surface of the side tube 3 of the T-shaped tube 1. That is, since no upward stress remains after deformation, the cap 4 is not deformed as in the prior art. Accordingly, the outwardly curved surface 14a formed of the inclined surface of the valve body 11 and the inclined surface 23 of the bottom surface of the valve body storage portion 17 are stored in close contact with each other without any inconvenience such as liquid leakage. Furthermore, since no upward stress remains after deformation, the protective cap 4 is not adversely affected by deformation due to heat treatment or the like.

FIG. 5 is a cross-sectional view showing a needleless T-shaped tube in which a protective cap having an insertion portion at the center is put on the opening of the side tube in the needleless T-shaped tube of the present invention. In FIG. 5, the valve body storage portion 17 of the side tube 3 of the needleless T-shaped tube 1 has a compression storage valve body 11a, and is fitted and covered with the circular convex portion 12 of the compression storage valve body 11a. There is no step at the boundary between the surface of the protective cap 4 and the surface (concave surface) 12a of the circular convex portion 12 of the compression storage valve body 11a, in which the upper surface 4a of the protective cap 4 and the circular convexity of the compression storage valve body 11a. The upper surface of the portion 12 is a concave surface that is inclined so as to be lowered toward the center portion. That is, there is no step at the boundary between the upper surface 4a of the protective cap 4 and the concave surface 12a formed on the upper surface of the circular convex portion 12 of the compression storage valve body 11a, and the entire surface is inclined so as to be lowered toward the central portion. Since it is a smooth concave surface, the upper surface 4a of the protective cap 4 is not subjected to the deformation stress of the compression storage valve body 11a, and therefore the compression storage valve body 11a does not leave any outward stress. Even when heat is applied, the protective cap 4 is not deformed, and the so-called upper surface 4a does not rise. In addition, when such a smooth concave surface is formed, when a chemical solution or the like accumulates on the concave surface, there is an effect that it is easy to wipe off. Further, when the valve body 11 is compressed and stored in the T-tube 1 due to the shape or structure of the valve body 11 of the present invention, the deformation stress of the compression storage valve body 11a becomes inward, so that the insertion resistance of the syringe barrel is reduced. This provides an excellent effect that the syringe barrel can be easily inserted.

In the present invention, the upper surface of the valve body and the surface of the circular convex portion of the upper surface have a concave surface inclined in the central portion direction, and the lower surface has a convex surface inclined in the central portion direction and outward, that is, the valve body. The upper surface and the lower surface are arched and substantially parallel to the thickness, so that a valve body that does not leak a liquid medicine when inserting or removing the needleless syringe can be obtained and the syringe can be easily inserted. There is an effect, and there is no thermal deformation such as a protective cap rising during overheat treatment, and in the future, demand is expected as an extremely useful medical device in practical use.

1 T-shaped tube or needleless T-shaped tube 2 Main tube 2a, 2b Tube connection 3 Side tube 4 Protective cap 4a Upper surface 5 Lid 6 Hinge 7 Knob 8 Split valve 8a, 8c Split valve 8b, 8d Compression storage split valve or Split valve 8e top surface (bulge) during compression storage
8f Recess (top)
8g Concave (bottom surface)
8h Bottom (bulge)
9 Slit (needleless syringe insertion part)
10 Valve valve storage part 11 Valve body 11a Compression storage valve body or compressed and stored valve body 12 Circular convex part 12a Concave surface 13 Upper surface 13a Concave surface 14 Lower surface (convex shape)
14a Outwardly curved surface 15 Lower surface recess 16 Valve body wall 17 Valve body storage portion 21 Air gap or gap 22 Slope inclined wall 23 Inclined surface 24 of valve body storage portion bottom surface Conventional bottom surface (horizontal plane)
25 slits

Claims (5)

A cylindrical portion and a concentric circular convex portion at the central portion of the upper surface of the cylindrical portion, a concentric curved surface portion at the lower surface of the cylindrical portion, and further at the central portion of the circular convex portion In the valve body having the insertion part of the needleless syringe, the upper surface and the surface of the circular convex portion on the upper surface have a concave surface inclined in the central portion direction, and the lower surface has a convex surface inclined in the central portion direction and outward. A valve body characterized by having. The inclination of the concave surface inclined toward the central portion of the upper surface of the cylindrical portion of the valve body and the inclination of the convex surface inclined toward the central portion and outward of the lower surface are arched and substantially parallel to the thickness. The valve body according to claim 1. The size of the valve body before being compressed and stored in the needleless T-shaped tube is such that the upper surface portion excluding the circular convex portion on the upper surface of the cylindrical portion of the valve body with respect to the inner diameter of the storage portion of the T-shaped tube. The valve body according to claim 1, wherein the valve body has a horizontal size. In a needleless T-shaped tube having a main pipe and a side pipe having a valve body storage section and having an inflow hole communicating with the main pipe on the bottom surface of the storage section, the bottom surface of the valve body storage section is lowered toward the center portion. A needleless T-shaped tube that is inclined like this. In a needleless T-shaped tube with a protective cap having a circular hole in the center at the opening of the side tube, it fits into the circular convex portion of the valve body compressed and housed in the valve body housing portion of the side tube There is no step at the boundary between the surface of the protective cap covered and the surface of the circular convex portion of the valve body, so that the surface of the protective cap and the surface of the circular convex portion of the valve body are lowered toward the center portion. The needleless T-shaped tube according to claim 4, wherein the needleless T-shaped tube is inclined to form a concave surface.

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