JP4116754B2 - Mixed injection tool - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a mixed injection device.
[0002]
[Prior art]
In medical practice, catheters and needles are inserted into veins and infusions are often performed at the time of surgery, hospitalization, and central venous nutrition.
[0003]
In the case of injecting other chemicals or the like in various infusions, the infusion is performed in parallel with the infusion or with the infusion temporarily suspended. As this method, a method of injecting a chemical solution or the like through a mixed injection part provided in advance with an infusion line or syringe capable of connecting another infusion line or syringe in the middle of the infusion route is usually used.
[0004]
As parts used in this co-injection section, a mixture pipe (manifold) in which a rubber pipe for co-infusion, a liquid co-infusion tool such as a Y site (also referred to as a “T-shaped tube”), a three-way cock, and a three-way cock are connected is known. .
[0005]
Also, in arterial lines for the purpose of continuous arterial pressure monitoring, etc., a method is used in which a branch part having almost the same action as the mixed injection part is provided in the middle of the line, and blood is collected from the branch part when necessary. It has been.
[0006]
Among the parts used in the co-infusion section, the most primitive rubber tube for co-infusion is pierced and used with a syringe with a needle, etc., so doctors and nurses (hereinafter referred to as health care workers) accidentally put their fingers. There is a risk of puncturing, and when connected for a long period of time, the drug solution (liquid) is likely to leak, it is difficult to fix in the case of long-term mixed injection, or the drug solution is likely to leak after repeated punctures (low puncture durability) ) Etc., but it is still used because it is inexpensive.
[0007]
In recent years, a rubber open / close valve has been provided at the co-injection port to prevent medical practitioners from piercing the needle, and the syringe or extension tube luer tip remains the same or has a smaller outer diameter than the luer tip. Mixed inlets with valves that can be connected using blunt needles have been developed.
[0008]
However, in the mixed injection port with a valve, it is necessary to provide the valve with a slit that communicates the inner and outer surfaces, strongly press the slit, close it with a large distortion, which makes the structure complicated, expensive, and long. In the case of connection for a period, the valve is deformed, and the deformation does not sufficiently close the slit, thereby causing many problems such as liquid leakage.
[0009]
In addition, the three-way stopcock has an advantage that it has a structure of a normal female luer connector in the co-injection portion, and can be connected to a male luer connector of a syringe or an infusion line without using a needle. In addition, it has the function of switching the injection route, such as injecting another chemical at the same time as the main drug solution, or temporarily interrupting the injection of the main drug solution and performing only side injection, and is now most frequently used because it is convenient.
[0010]
However, in the three-way stopcock, when the stopcock is closed, there is a portion (dead space) where the chemical solution does not flow inside the female luer, and since there is no rubber septum that shuts off the outside, the female luer falls into the air. There is a problem that bacteria and the like adhere and easily grow after connection, and there is a possibility that these bacteria may be mixed into the patient.
[0011]
In addition, because there is a Y-shaped space for switching the flow path inside the cock of the three-way cock, if one direction is closed, a part where it is difficult for the chemical to flow may occur, or several three-way cocks are connected continuously When connected and used as a multiple stopcock, because there is a step in the connection part, the flow of the drug is likely to be disturbed, and when injecting a small amount of drug accurately and continuously, it may be diluted in a portion that is difficult to flow, Alternatively, although the entire amount side pouring should have been completed, there is an inconvenience that it takes time to flow the entire amount after remaining in the step or the cock.
[0012]
Furthermore, since the chemical solution is difficult to flow in such portions, steps, and dead spaces, it is difficult to turn the chemical solution, so that the work of removing air (priming) in the line before connecting the infusion line to the patient is complicated. is there.
[0013]
The above problem is the same in the conventional Y-site with a rubber septum and in the new mixed injection port improved so that a blunt needle or a male luer connector can be inserted for the purpose of preventing a medical worker from piercing.
[0014]
[Problems to be solved by the invention]
An object of the present invention is to provide a co-infusion device that has a simple structure, can be operated easily and safely, can be used for a long period of time, and can reliably prevent liquid leakage.
[0015]
[Means for Solving the Problems]
  Such purposes are as follows (1) to (11This is achieved by the present invention.
[0016]
  (1) A co-infusion device having at least a part of a valve body made of an elastic material and a housing for holding the valve body, and having a flow path therein.
  The valve body isPlate-shaped,The valve body has a first end face exposed to the outside and a second end face exposed in the flow path, and the valve body opens to the first end face and does not open to the second end face. A first notch and a second notch that intersects the first notch inside, opens at the second end face, and does not open at the first end face,
  The valve body isBy curving the valve body so that the first end face side is convex,The inner surface of the second cut is deformed so that only the inner surfaces are crimped.The first cut is closedHeld in the housing in a stateAnd
The first notch at the first end surface and the second notch at the second end surface are substantially orthogonal,
The direction of the flow path substantially coincides with the direction of the second cut at the second end surface,
  The direction of the curve and the direction of the first notch in the first end face substantially coincide with each other.A mixed injection device characterized by that.
[0017]
(2) The co-infusion device according to (1), wherein a direction perpendicular to the direction of the curve and a direction of the second notch in the second end surface substantially coincide with each other.
[0018]
(3) The mixed injection device according to (1) or (2), wherein a compressive force is applied to the entire valve body.
[0019]
(4) A co-infusion device having at least a part of a valve body made of an elastic material and a housing for holding the valve body, and having a flow path therein.
The valve body has a first end face exposed to the outside and a second end face exposed in the flow path, the first end face being an outer peripheral face, and the second end face being an inner peripheral face. And at least part of the flow path is constituted by the lumen of the valve body,
The valve body has a first notch that opens at the first end surface and does not open at the second end surface, intersects the first notch inside, opens at the second end surface, and A second notch that does not open in the first end face is provided,
The valve body is deformed so that only the inner surfaces of the second cuts are pressure-bonded by being compressed by the housing in a direction substantially perpendicular to the axial direction of the valve body. Held in the housing with the notch closed,
The first notch at the first end surface and the second notch at the second end surface are substantially orthogonal,
The direction of the flow path substantially coincides with the direction of the second cut at the second end surface,
The co-infusion device, wherein a direction perpendicular to the axial direction of the valve body and a direction of the first notch in the first end face substantially coincide with each other.
[0020]
(5) The co-infusion device according to (4), wherein an axial direction of the valve body and a direction of the second notch in the second end face are substantially coincident.
[0021]
(6) The mixed injection device according to (4) or (5), wherein the outer shape of the transverse cross section of the valve body is substantially circular.
[0023]
(7) The housing has a cylindrical shape having an opening on a side surface, and the first cut is located in the opening,
The valve body is inserted into the housing;
A direction of a straight line that passes through a position shifted by 90 ° about the central axis of the valve body from the intersection where the first cut and the second cut intersect, and is perpendicular to the axial direction of the valve body The co-infusion device according to any one of the above (4) to (6), wherein when viewed from the opening, a part of the outer peripheral surface of the valve body is visible from the opening.
[0024]
(8) The housing has an outer peripheral side of the valve body, and has a portion higher than an outer surface of a portion where the first cut of the valve body exists in the vicinity of the first cut (4 ) To (6).
[0025]
(9) The housing is on the outer peripheral side of the valve body and surrounds a portion of the valve body where the first cut is present, and the first cut is present in the vicinity of the first cut. The mixed injection device according to any one of the above (4) to (6), which has a portion higher than the outer surface of the part to be performed.
[0026]
(10) The co-infusion device according to any one of (4) to (9), wherein an engagement means for engaging the housing and the valve body is provided.
[0030]
  (11) Of the first end face, the vicinity of the first notch is a flat surface or a concave surface (1) to (1)10) The mixed injection device according to any one of the above.
[0037]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the mixed injection device of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
[0038]
FIG. 1 is a perspective view showing a first embodiment of the mixed injection device of the present invention, and FIG. 2 is a perspective view showing a configuration example of a valve body in a natural state of the mixed injection device shown in FIG.
[0039]
As shown in these drawings, the co-infusion device (liquid co-infusion device) 1 includes a hard housing 4 and a valve body 2 attached to the housing 4.
[0040]
The housing 4 includes a housing main body 41 and a lid member 42 in which an opening 421 is formed.
[0041]
Examples of the constituent material of the housing 4 include polycarbonate, polysulfone, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyethylene naphthalate, polyacrylate, polyamide, rigid polyvinyl chloride, acrylonitrile-butadiene-styrene copolymer (ABS resin). And various resins such as cyclic polyolefin, fluororesin and poly- (4-methylpentene-1), various metals such as stainless steel, aluminum and titanium, various ceramics such as alumina, and composites thereof. .
[0042]
The valve body 2 is composed of a plate-like elastic body, and the shape in its natural state, that is, the shape before being mounted on the housing 4 is a substantially rectangular parallelepiped (flat plate) as shown in FIG. I am doing.
[0043]
Here, the “natural state” refers to a state when no external force is applied to the valve body 2.
The valve body 2 has a direction (direction indicated by an arrow B in FIG. 1) perpendicular to a direction of bending (direction indicated by an arrow A in FIG. 1) of the valve body 2 described later, that is, a flow path 61 described later. It has two valve parts (mixed injection port) 3 arranged in parallel along the direction. In addition, since the structure of these valve parts 3 is the same, one valve part 3 is demonstrated typically.
[0044]
The valve section 3 is formed with a first cut 31 and a second cut 32 that partially cross each other inside.
[0045]
The first notch 31 opens (reaches) to the first end surface 21 out of the first end surface (surface) 21 and the second end surface (surface) 22, and opens to the second end surface 22. Not.
[0046]
On the contrary, the second notch 32 opens in the second end surface 22 and does not open in the first end surface 21.
[0047]
The first cut 31 and the second cut 32 intersect in a cross shape, that is, the intersection angle between the first cut 31 and the second cut 32 is 90 ° (end face) The first notch 31 at 21 and the second notch 32 at the end face 22 are orthogonal to each other), but the intersection angle is not limited to 90 °.
[0048]
In the natural state, the first cut 31 and the second cut 32 are closed.
[0049]
Moreover, although the shape of the 1st cut 31 and the 2nd cut 32 is each circular arc shape (substantially semicircle), it cannot be overemphasized that it is not limited to this shape.
[0050]
In the present embodiment, the intersecting portion 33 where the first cut 31 and the second cut intersect is linear.
[0051]
The length L of the intersecting portion 33 between the first cut 31 and the second cut 32 is not particularly limited, but is about 20 to 50% of the thickness of the valve body 2 (particularly the thickness of the valve portion 3). Preferably, about 30 to 40% is more preferable.
[0052]
The thickness of the valve body 2, particularly the thickness of the valve portion 3 is, for example, the outer diameter (diameter) and length of the hard pipe (tube body) to be inserted, the internal / external pressure difference of the valve body 2, the second The thickness is set to be easy to insert depending on various conditions such as the crimping force between the inner surfaces of the notch 32, but is preferably 0.1 times or more the outer diameter (diameter) of the hard pipe. More preferably, it is about 3 to 1 times. Further, in order to cope with a relatively large difference between the internal and external pressures, it is preferably at least twice the outer diameter (diameter) of the hard pipe.
[0053]
In addition, although the thickness of the valve body 2 is constant in this embodiment, it may not be constant. For example, the thickness of the valve portion 3 of the valve body 2 may be made thicker than other portions, or may be made thinner.
[0054]
Further, the Shore A hardness of the valve body 2 is preferably about 20 to 80, and more preferably about 30 to 50.
[0055]
Moreover, the elongation rate of the material which comprises the valve body 2 is so preferable that it is large, and specifically, it is preferable that it is 500% or more.
[0056]
Examples of the constituent material of the valve body 2 include various rubbers such as natural rubber, isoprene rubber, butyl rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, acrylic rubber, fluorine rubber, and silicone rubber, polyurethane, and polyester. And elastic materials such as various elastomers such as polyamide-based, olefin-based, and styrene-based materials can be used, and one or more of these materials can be used in combination.
[0057]
In order to manufacture the valve body 2, for example, a plate-like elastic body in which the first cut 31 and the second cut 32 are not formed is formed, and the first cut 31 and the first cut are formed in the obtained elastic body. Two notches 32 are formed respectively.
[0058]
As shown in FIG. 1, the valve body 2 is deformed (elastically deformed) so that the end surface 21 is on the outside, the end surface 22 is on the inside, and the inner surfaces of the second cuts 32 are crimped, and the state (deformed) In this state, the housing 4 is clamped between the housing main body 41 and the lid member 42, thereby being fixed to the housing 4 in a liquid-tight manner. That is, the valve body 2 is held in the deformed state by the housing 4. In addition, each valve part 3 is located in the position of the opening 421, respectively.
[0059]
Here, “deformation” means that at least a part of the shape is different from the shape when no external force is applied (including a case where the shape is similar and the dimensions change).
[0060]
In the present embodiment, the valve body 2 is curved in a predetermined direction so as to be convex outward (upper side in FIG. 1), that is, the end face 21 side is convex. Crimped. The first cut 31 is closed.
[0061]
The direction of curvature of the valve body 2 (the direction indicated by the arrow A in FIG. 1) is equal to (coincides with) the direction of the first notch 31 on the end face 21.
[0062]
Accordingly, the valve body 2 can be bent without applying a force to open the first cut 31 and the first cut 31 can be kept closed. The end surface 21 can be easily cleaned).
[0063]
Further, the direction perpendicular to the bending direction of the valve body 2 (the direction indicated by the arrow B in FIG. 1) coincides with the direction of the second notch 32 in the end face 22.
[0064]
Thereby, the inner surfaces of the second cuts 32 can be more reliably crimped.
[0065]
The strength of pressure bonding between the inner surfaces of the second notches 32 can be variously set by changing various conditions such as the physical properties of the valve body 2, the shape of the notches, and the degree of deformation.
[0066]
Further, it is preferable that a compressive force is applied to the entire valve body 2.
As a result, the pressure on the first notch 31 and the second notch 32 (the strength of pressure bonding between the inner surfaces of the first notch 31 and the inner surface of the second notch 32) increases, and contamination with bacteria and the like is increased. It can prevent more reliably.
[0067]
As a specific example of the deformation of the valve body, in addition to the case where the flat plate-like valve body is curved, for example, when the curved plate-like valve body is flat, the curved plate-like Examples include a case where the degree of bending of the valve body is increased, a case where a curved plate-like valve body is bent in the opposite direction, and a case where compressive force or tensile force is applied to the whole or part of the valve body. .
[0068]
On the left side of the mixed injection device 1 in FIG. 1, one end side of the tube 51 is connected so that the lumen and the hollow portion 62 of the mixed injection device 1 communicate with each other.
[0069]
Further, one end side of a tube (not shown) is connected to the right side in FIG. 1 of the mixed injection device 1 so that the lumen and the hollow portion 62 of the mixed injection device 1 communicate with each other.
[0070]
The hollow portion 62 of the mixed injection device 1, the lumen of the tube 51, and the lumen of the tube (not shown) constitute the main part of the flow path 61.
[0071]
The direction of the flow path 61 (hollow part 62) is a direction perpendicular to the direction of the second notch 32 in the end face 22 of the valve body 2, that is, the direction of curvature of the valve body 2 (indicated by an arrow B in FIG. 1). Equal to the direction shown).
[0072]
The inner diameter (diameter) of the flow path 61 (hollow part 62) is not particularly limited and is appropriately set depending on the application and the like, but about 1 to 20 mm, which is the flow path diameter of a general medical liquid co-infusion device. preferable.
[0073]
Moreover, although not shown in figure, it is preferable that the vicinity of the 1st notch 31 (end surface 21 in the valve part 3) among the end surfaces 21 of the valve body 2 is a plane or a concave surface (for example, curved concave surface).
[0074]
Thereby, when inserting a hard pipe in the valve part 3, it can be performed easily, quickly and reliably.
[0075]
That is, the end surface 21 around the valve portion 3 of the valve body 2 is a curved convex surface (convex surface), and only the end surface 21 of the valve portion 3 is a flat surface or a concave surface, so that the position of the valve portion 3 can be easily and reliably grasped. can do. And since the end surface 21 in the valve part 3 is a plane or a concave surface, compared with the case where it is a convex surface, a hard pipe is hard to slip, and, thereby, a hard pipe can be inserted in the valve part 3 easily.
[0076]
Needless to say, the mixed injection device 1 can be used not only as a mixed injection port but also as a sampling port, a mixed injection / sampling port (mixed injection / sampling port), and the like.
[0077]
Next, the operation of the mixed injection device 1 will be described.
For example, when a hard pipe (tubular body) or the like is not inserted (inserted) into the valve portion 3 of the valve body 2, as shown in FIG. 1, the first cut 31 and the second cut 32 are respectively The inner surfaces of the second cuts 32 are closed, and the liquid tightness (air tightness) of the flow path 61 is maintained.
[0078]
For example, when a liquid (for example, a chemical solution) is side-injected (injected) into the channel 61 (hollow part 62) from another infusion line or syringe, or when the liquid flowing through the channel 61 is sampled, A predetermined hard pipe (not shown) is inserted into the valve unit 3.
[0079]
When the hard pipe is inserted from the first cut 31 of the valve section 3, the inner surface of the intersection 33 of the first cut 31 and the second cut 32 is in close contact with the outer peripheral surface of the hard pipe, and is liquid-tight. Sex is preserved.
[0080]
When the hard pipe is inserted, the inner surface of the intersecting portion 33 is in close contact with the outer peripheral surface of the hard pipe, and liquid tightness is maintained. In this case, since the valve body 2 is curved so that the inner surfaces of the second cuts 32 are pressed against each other, the width of the opened portion of the second cuts 32 is minimized. In this state, side injection or sampling of the liquid is performed.
[0081]
After the side pouring and sampling of the liquid are completed, the hard pipe is pulled out from the valve portion 3. At this time, the liquid tightness is maintained as described above.
[0082]
As described above, according to the mixed injection device 1, the smooth flow path 61 having almost no dead space or a step where the liquid easily stays is formed, and thereby the liquid flows smoothly and reliably. That is, it is difficult for turbulent flow to occur, and the liquid can be prevented from staying.
[0083]
Moreover, when connecting a syringe, a connector, or the like to the co-infusion device 1, it is only necessary to insert a hard pipe into the valve portion 3, so that the connection operation can be performed easily and safely (good connection operability).
[0084]
And since the valve body 2 is curved (deformed) so that the inner surfaces of the second cuts 32 are pressure-bonded, of course, when nothing is inserted (inserted) into the valve portion 3, for example, Even when a hard pipe is inserted, when a hard pipe with a different outer diameter is inserted, or when a hard pipe is inserted or pulled out, liquid tightness is ensured, and the Liquid leakage can be reliably prevented.
[0085]
In addition, since the valve body 2 is curved so that the inner surfaces of the second notches 32 are pressed against each other, when the hard pipe is inserted for a long period of time, it is surely liquid-tight after the hard pipe is pulled out. Thus, liquid leakage from the valve body 2 can be reliably prevented. That is, the durability is very good.
[0086]
Further, when the valve body 2 is deformed such that the pressure in the flow path 61 increases and the area (flow path area) in the cross section of the flow path 61 (hollow part 62) increases, the second cut 32 is provided. The strength of the pressure bonding between the inner surfaces of the liquid crystal elements increases, thereby preventing the liquid in the flow path 61 from leaking from the valve body 2.
[0087]
In addition, if some liquid remains in the first cut 31 or the second cut 32, the first cut 31 and the second cut 32 are closed when the hard pipe is pulled out, Any liquid that remains in the cut is drained.
[0088]
Further, since the valve body 2 is curved so that the inner surfaces of the second cuts 32 are pressure-bonded to each other, even if the widths of the first cut 31 and the second cut 32 are relatively large, the valve body 2 Liquid leakage from 2 can be prevented.
[0089]
And by making the width | variety of the 1st cut 31 and the 2nd cut 32 comparatively large, the frictional resistance at the time of insertion of a hard pipe and drawing-out can be made comparatively small, and, thereby, insertion of a hard pipe Further, operations such as drawing can be performed more easily.
[0090]
Further, at portions other than the intersection 33, even if the inner surfaces of the first notch 31 and the second notch 32 are not in contact with the entire circumference of the inserted hard pipe, liquid leakage from the valve body 2 can occur. Can be prevented. For this reason, the deformation amount of the valve body 2 (the first cut 31 and the second cut 32) when the hard pipe is inserted can be made relatively small, and thus the hard pipe is inserted for a long time. In this case, even after the hard pipe is pulled out, the liquid pipe is surely liquid-tight, and liquid leakage from the valve body 2 can be reliably prevented.
[0091]
Moreover, since the direction of the 1st notch 31 in the end surface 21 of the valve body 2 is equal to the direction of the curve of the valve body 2, the 1st notch 31 can maintain a closed state, thereby, cleaning work (for example, , Cleaning of the end face 21 of the valve body 2 and the like can be easily performed.
[0092]
Further, since the direction of the second cut 32 in the end face 22 of the valve body 2 is the same as the direction of the flow path 61, when the liquid flows along the flow path 61, the second cut 32 is made with respect to the valve body 2. The force in the opening direction does not act, and therefore the second cut 32 is difficult to open.
[0093]
Even if the second cut 32 is opened, the direction of the second cut 32 on the end face 22 is the same as the direction of the flow path 61, so that the liquid is smooth in the second cut 32 and in the vicinity thereof. Flowing into. That is, it is difficult for turbulent flow to occur, and the liquid can be prevented from staying.
[0094]
Further, since it is not necessary to use a needle, there is an advantage that a coring caused by cutting of the valve body 2 by the cutting edge and liquid leakage do not occur.
Moreover, the mixed injection device 1 has a simple structure.
[0095]
In the embodiment, the number of the valve parts 3 of the valve body 2 is two. However, in the present invention, the number of the valve parts 3 of the valve body 2 may be one, or may be three or more. Good. That is, the number of the valve parts 3 of the valve body 2 may be singular or plural.
[0096]
In the present invention, the first cut 31 may be open in the natural state, and the first cut 31 may be closed after the deformation. In this case, examples of the first cut 31 in the natural state include a groove.
[0097]
In the present invention, the second cut 32 may be open in a natural state, and the inner surfaces of the second cut 32 may be crimped together after deformation. In this case, examples of the second cut 32 in the natural state include a groove.
[0098]
In the present invention, the inner surfaces of the first cuts 31 and the inner surfaces of the second cuts 32 may be respectively crimped after deformation. Hereinafter, this embodiment (second example of the first embodiment) will be described.
[0099]
FIG. 3 is a perspective view showing a second configuration example of the valve body in the natural state of the mixed injection device shown in FIG. 1. In addition, about a common point with the mixed injection tool 1 of 1st Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0100]
As shown in the figure, the valve body 2 of the co-infusion device 1 is composed of a plate-like elastic body, and its shape (outer shape) when viewed from the direction of the arrow in FIG. The shape seen from the direction of the arrow in FIG. 3 before being attached to the housing 4 is substantially trapezoidal.
[0101]
In this case, the length of the side of the trapezoid on the first end face 21 side (upper side in FIG. 3) is set longer than the length of the side on the second end face 22 side (lower side in FIG. 3) (end face). The area of 21 is set larger than the area of the end face 22).
[0102]
When the valve body 2 is mounted on the housing 4, the valve body 2 is bent, whereby the inner surfaces of the second cuts 32 are pressed against each other, and the end surface 21 side of the valve body 2 is horizontal by the housing 4 in FIG. 3. The inner surfaces of the first cuts 31 are pressed against each other.
Thereby, mixing of bacteria etc. can be prevented more reliably.
[0103]
Moreover, according to this mixed injection tool 1, the effect similar to the mixed injection tool 1 of 1st Embodiment mentioned above is acquired.
[0104]
Next, a second embodiment of the mixed injection device of the present invention will be described.
FIG. 4 is a perspective view showing a second embodiment of the mixed injection device of the present invention, FIG. 5A is a cross-sectional view showing a configuration example of the valve body in the natural state of the mixed injection device shown in FIG. b) is a cross-sectional view (cross-sectional view) taken along line CC in FIG. In addition, about a common point with the mixed injection tool 1 of 1st Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0105]
As shown in these drawings, the co-infusion device 1 includes a hard housing 8 and a valve body 7 attached to the housing 8.
[0106]
As shown in FIG.5 (b), the shape in the cross section of the housing 8 has comprised C shape. That is, the overall shape of the housing 8 is such that the upper side in FIGS. 4 and 5 of the cylinder is removed.
[0107]
A pair of grooves 81, 81 are formed in the outer peripheral portion of the housing 8 along the axial direction of the housing 8. When a connector (not shown) is connected to the pair of grooves 81, 81, a pair of claws of the connector is engaged, thereby preventing the connector from detaching from the mixture injection tool 1.
[0108]
The valve body 7 is formed of a cylindrical (tubular) elastic body and has a valve portion 3.
The first cut 31 of the valve portion 3 opens on the outer peripheral surface (first end surface) 71 of the valve body 7 and does not open on the inner peripheral surface (second end surface) 72.
[0109]
Conversely, the second cut 32 of the valve portion 3 opens on the inner peripheral surface 72 of the valve body 7 and does not open on the outer peripheral surface 71.
[0110]
The shapes of the first notch 31 and the second notch 32 are each an arc shape (bow shape), but it is needless to say that the shape is not limited to this shape.
[0111]
In the valve body 7, the direction perpendicular to the axial direction coincides with the direction of the first notch 31 on the outer peripheral surface 71.
[0112]
Thereby, the 1st cut | notch 31 can be made into the closed state, and a cleaning operation | work (for example, cleaning of the outer peripheral surface 71 of the valve body 7, etc.) can be performed easily.
[0113]
Further, the axial direction of the valve body 7 coincides with the direction of the second cut 32 in the inner peripheral surface 72.
[0114]
Thereby, the inner surfaces of the second cuts 32 can be more reliably crimped.
[0115]
The lumen 73 of the valve body 7 constitutes a part or the main part of the flow path 61. Therefore, the direction of the flow path 61 (inner cavity 73) is equal to the axial direction of the valve body 7, that is, the direction of the second cut 32 in the inner peripheral surface 72.
[0116]
The shape of the valve body 7 in the natural state, that is, the shape before being mounted on the housing 8 is cylindrical as shown in FIG.
[0117]
In order to manufacture the valve body 7, for example, a cylindrical elastic body in which the first notch 31 and the second notch 32 are not formed is continuously extruded, and the first notch 31 is formed into the obtained elastic body. And a second notch 32 are formed.
[0118]
In order to form the second cut 32, for example, a cutter having a constant blade depth is inserted from one opening of the valve body 7, and cut from the inner peripheral surface 72 with the cutter.
[0119]
In order to form the second cut 32, for example, after forming the first cut 31, the valve body 7 is deformed so that the first cut 31 is opened, and the first cut 31 is opened. You may cut toward the internal peripheral surface 72 with a cutter.
[0120]
In order to manufacture the valve body 7, for example, a cylindrical elastic body in which the first notch 31 is not formed and the second notch 32 is formed as a groove is molded, and the obtained elasticity is obtained. A first cut 31 may be formed in the body. Even if the second notch 32 is open in the natural state, the valve element 7 is deformed so that the inner surfaces of the second notch 32 are pressed against each other, and thus functions reliably.
[0121]
As shown in FIG. 5B, the valve body 7 has the valve portion 3 on the upper side in FIG. 5, the outer peripheral surface 71 of the valve portion 3 is exposed, and the valve portion 3 is located at the position of the housing 8. Thus, it is inserted into the housing 8 and is sandwiched by the housing 8.
[0122]
That is, the valve body 7 is pressed by the corresponding portion of the housing 8 from the side (valve body) when the intersection 33 of the first cut 32 and the 32nd cut 32 is set to the upper side (upward) in FIG. 7 and compressed so that the inner surfaces of the second cuts 32 are pressed against each other (slightly crushed in the lateral direction in FIG. 5). The deformation state is maintained.
[0123]
The outer shape and the inner shape of the valve body 7 in the cross section after deformation, that is, the outer shape and the inner shape in the state of being mounted on the housing 8 are substantially circular.
[0124]
In addition, the outer diameter (diameter) a in the natural state of the valve body 7 shown in FIG. 5A and the inner diameter (diameter) b of the housing 8 shown in FIG. It is set to be larger than b.
[0125]
On the left side in FIG. 4 of the mixed injection device 1, for example, one end side of a tube (not shown) is connected so that the lumen and the lumen 73 of the valve body 7 communicate with each other, and on the right side in FIG. For example, one end side of a tube (not shown) is connected so that the lumen and the lumen 73 of the valve body 7 communicate with each other. In this case, the lumen 73 of the valve body 7 and the lumen of the tube constitute the main part of the flow path 61.
[0126]
Moreover, in this mixed injection tool 1, the said tube can be abbreviate | omitted by adjusting the length of the axial direction of the valve body 7 (it makes comparatively long). That is, the main part of the flow path 61 can be constituted by the lumen 73 of the valve body 7.
[0127]
According to this mixed injection device 1, the same effect as the mixed injection device 1 of 1st Embodiment mentioned above is acquired.
[0128]
And in this mixed injection tool 1, since the valve body 7 is cylindrical shape, the flow path 61 smoother than the mixed injection tool 1 of 1st Embodiment mentioned above is formed. That is, the smooth flow path 61 without a dead space and the level | step difference which a liquid stays easily is formed, and, thereby, a liquid flows more smoothly and reliably.
[0129]
Further, since the valve body 7 is cylindrical, the second notch 32 is shaped so as to open in a natural state (for example, a groove), the valve body 7 is eccentric, or the valve body 7 is slightly Even if crushed, it works reliably.
[0130]
In the embodiment, the number of the valve parts 3 of the valve body 7 is one (single). However, in the present invention, the number of the valve parts 3 of the valve body 7 may be two or more (plural). .
[0131]
Further, the valve body 7 may be bonded to the housing 8 with an adhesive, for example.
Further, a flat portion may be provided on the outer peripheral side of the housing 8 so as to improve stability.
[0132]
In addition, the co-infusion device 1 may be provided with a connection port connected to the end of the valve body 7 for connecting another liquid feeding device.
[0133]
Next, a third embodiment of the mixed injection device of the present invention will be described.
Fig. 6 (b) is a cross-sectional view showing a third embodiment of the mixed injection device of the present invention, and Fig. 6 (a) shows a configuration example of the valve body in the natural state of the mixed injection device shown in Fig. 6 (b). It is a cross-sectional view. In addition, about a common point with the mixed injection tool 1 of 2nd Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0134]
As shown in the figure, the valve body 7 of the co-infusion device 1 is formed of a cylindrical (tubular) elastic body in which the lumen 73 is eccentric. That is, the thickness (wall thickness) of the valve body 7 is not constant.
[0135]
And the valve part 3, ie, the 1st notch 31, and the 2nd notch 32, are arrange | positioned in the position where the thickness of the valve body 7 becomes the thickest.
[0136]
In other words, the thickness of the valve body 7 is set so that the thickness of the valve portion 3, that is, the thickness of the portion where the first notch 31 and the second notch 32 are located is the largest.
[0137]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the second embodiment described above can be obtained.
[0138]
And in this mixed injection tool 1, since the thickness of the valve part 3 is the thickest among the valve bodies 2, compared with the mixed injection tool 1 of 2nd Embodiment mentioned above, liquid-tightness is hold | maintained more reliably, The pressure resistance is high, and liquid leakage from the valve body 2 can be prevented more reliably.
[0139]
Next, a fourth embodiment of the mixed injection device of the present invention will be described.
FIG.7 (c) is a cross-sectional view which shows 4th Embodiment of the mixed injection tool of this invention, FIG.7 (a) and FIG.7 (b) are the natural states of the mixed injection tool shown in FIG.7 (c), respectively. It is a cross-sectional view which shows the structural example of the valve body in. In addition, about a common point with the mixed injection tool 1 of 2nd Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0140]
As shown in the figure, the valve body 7 of the co-infusion device 1 is composed of a cylindrical elastic body.
As shown in FIGS. 7A and 7B, the outer shape of the valve body 7 in a natural cross section in a natural state, that is, the outer shape in a cross section before being mounted on the housing 8 is substantially elliptical. It is.
[0141]
Further, the inner shape of the valve body 7 in the cross section in the natural state, that is, the inner shape in the cross section before being mounted on the housing 8, is as shown in FIGS. 7 (a) and 7 (b). It is almost semicircular.
[0142]
And the external shape in the cross section after the deformation | transformation of the valve body 7, ie, the external shape in the cross section in the state with which the housing 8 was mounted | worn is substantially elliptical, as shown in FIG.7 (c).
[0143]
Moreover, the inner shape in the cross section after deformation | transformation of the valve body 7, ie, the inner shape in the cross section in the state with which the housing 8 was mounted | worn, is a substantially circular shape, as shown in FIG.7 (c).
[0144]
Further, the thickness (wall thickness) of the valve body 7 is not constant, and the valve portion 3, that is, the first notch 31 and the second notch 32 are arranged at a position where the thickness of the valve body 7 is maximized. Has been.
[0145]
In other words, the thickness of the valve body 7 is set so that the thickness of the valve portion 3, that is, the thickness of the portion where the first notch 31 and the second notch 32 are located is the largest.
[0146]
In the valve body 7 shown in FIG. 7A, the second cut 32 is closed in the natural state.
[0147]
Moreover, in the valve body 7 shown in FIG.7 (b), the 2nd notch 32 is open in the natural state. That is, the second cut 32 in the natural state is a V-shaped groove.
[0148]
As described above, both of the valve body 7 shown in FIG. 7A and the valve body 7 shown in FIG. 7B are shown in FIG. As shown in FIG. 2, the inner surfaces of the second cuts 32 are pressure-bonded by the deformation.
[0149]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the second embodiment described above can be obtained.
[0150]
And in this mixed injection tool 1, since the external shape in a cross section is changed from a substantially elliptical shape to a substantially circular shape, the liquid tightness is more reliably maintained as compared with the mixed injection device 1 of the second embodiment described above, The pressure resistance is high, and liquid leakage from the valve body 2 can be prevented more reliably.
[0151]
Moreover, since the thickness of the valve part 3 is the thickest among the valve bodies 2, compared with the mixed injection tool 1 of 2nd Embodiment mentioned above, liquid-tightness is hold | maintained more reliably, and pressure | voltage resistance is high, and a valve body. The liquid leakage from 2 can be prevented more reliably.
[0152]
Next, a fifth embodiment of the mixed injection device of the present invention will be described.
FIG. 8 is a cross-sectional view showing a fifth embodiment of the mixed injection device of the present invention. In addition, about a common point with the mixed injection tool 1 of 3rd Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0153]
As shown in the figure, a pair of grooves 74 and 74 are formed along the axial direction on the outer peripheral portion of the valve body 7 of the co-infusion device 1.
[0154]
A pair of ribs (protrusions) 82, 82 that can engage with the pair of grooves 74, 74 at positions corresponding to the pair of grooves 74, 74 on the inner peripheral portion of the housing 8 on the upper side in FIG. 8. Is formed.
[0155]
Thereby, the rotation (displacement) of the valve body 7 with respect to the housing 8 and the detachment of the valve body 7 from the housing 8 are prevented.
[0156]
The pair of grooves 74 and 74 and the pair of ribs 82 and 82 constitute an engaging means (detachment preventing means).
[0157]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the third embodiment described above can be obtained.
[0158]
The valve body 7 of the co-infusion device 1 is provided with a groove 74, and the housing 8 is provided with a rib 82 that can be engaged with the groove 74. ), The detachment of the valve body 7 from the housing 8, for example, the detachment of the valve body 7 from the housing 8 when the inserted hard pipe is pulled out can be prevented.
[0159]
Moreover, in this mixed injection tool 1, the valve body 7 can be easily attached to the housing 8 as compared with the case where the valve body and the housing are bonded with an adhesive. That is, the mixed injection device 1 can be easily manufactured (assembled).
[0160]
In the present invention, the housing 8 may be provided with a groove, and the valve body 7 may be provided with a rib that can be engaged with the groove.
[0161]
In the present invention, the engaging means is not limited to a combination of a groove and a rib, and other examples include a combination of a concave portion and a convex portion, and a combination of a groove and a convex portion.
[0162]
Next, a sixth embodiment of the mixed injection device of the present invention will be described.
[0163]
FIG. 9 is a perspective view showing a sixth embodiment of the mixed injection device of the present invention. In addition, about a common point with the mixed injection tool 1 of 3rd Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0164]
As shown in the figure, the valve body 7 of the co-infusion device 1 has two valve portions 3 arranged in parallel along the axial direction thereof, that is, the direction of the flow path 61 (the inner lumen 73).
[0165]
In this case, the second notches 32 of the two valve portions 3 are configured by one common (one) notch extending along the axial direction of the valve body 7.
[0166]
Thereby, when manufacturing the valve body 7 having a plurality of (two in the present embodiment) valve portions 3, it is only necessary to form one second notch 32, so that the manufacture is easy and the productivity is high. .
[0167]
As described above, in the natural state, the second cut 32 may be closed or open. In any case, in a state where the valve body 7 is mounted on the housing 8, the valve body 7 is deformed and the inner surfaces of the second cuts 32 are pressure-bonded.
[0168]
Further, in the outer peripheral surface 71 of the valve body 7, the vicinity of the first cut 31 (the outer peripheral surface 71 in the valve portion 3) is a flat surface or a concave surface. In the present embodiment, the outer peripheral surface 71 of the valve portion 3 is a curved concave surface as shown in FIG.
[0169]
Thereby, when inserting a hard pipe in the valve part 3, it can be performed easily, quickly and reliably.
[0170]
That is, the outer peripheral surface 71 of the valve body 7 around the valve portion 3 is a curved convex surface (convex surface), and only the outer peripheral surface 71 of the valve portion 3 is a flat surface or a concave surface. Can grasp. And since the outer peripheral surface 71 in the valve part 3 is a plane or a concave surface, compared with the case where it is a convex surface, a hard pipe is hard to slip, and, thereby, a hard pipe can be inserted in the valve part 3 easily.
[0171]
Further, in the upper part of the housing 8 in FIG. 9, a part corresponding to each valve part 3 is formed with a notch 83 as an index indicating the position of the valve part 3.
Thereby, the position of the valve part 3 can be grasped easily and reliably.
[0172]
As described above, the outer peripheral surface 71 of the valve portion 3 is a flat surface or a concave surface, which serves as an index indicating the position of the valve portion 3, and it goes without saying that the cutout portion 83 may be omitted. Yes.
[0173]
Further, for example, one end side of a tube (not shown) is connected to the left side of the co-infusion device 1 in FIG. 9 via a connecting portion 91 so that the lumen and the lumen 73 of the valve body 7 communicate with each other. 9, for example, one end side of a tube (not shown) is connected via a connecting portion (not shown) so that the lumen and the lumen 73 of the valve body 7 communicate with each other.
[0174]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the third embodiment described above can be obtained.
[0175]
And in this mixed injection tool 1, since the vicinity (the outer peripheral surface 71 in the valve part 3) of the 1st cut 31 of the outer peripheral surface 71 is a plane or a concave surface, when inserting a hard pipe in the valve part 3, It can be done easily, quickly and reliably.
[0176]
In addition, also in the mixed injection device 1 of the second embodiment to the fifth embodiment described above, the seventh embodiment and the eighth embodiment described later, as in the mixed injection device 1 of the sixth embodiment, respectively, Of the outer peripheral surface (first end surface), the vicinity of the first notch is preferably a flat surface or a concave surface (for example, a curved concave surface), whereby a hard pipe (tubular body) is inserted into the valve portion. It can be done easily, quickly and reliably.
[0177]
Next, a seventh embodiment of the mixed injection device of the present invention will be described.
10 is a perspective view showing a seventh embodiment of the mixed injection device of the present invention, FIG. 11 is a cross-sectional view (cross-sectional view) taken along line DD in FIG. 10, and FIG. 12 is a mixed injection shown in FIG. It is a side view of a tool. In addition, about a common point with the mixed injection tool 1 of 3rd Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0178]
As shown in these drawings, the housing 8 of the co-infusion device 1 has a cylindrical shape (tubular shape).
[0179]
An opening 84 is formed on a side surface of the housing 8 and in an intermediate portion in the axial direction.
[0180]
The valve body 7 is inserted into the housing 8 and held in the housing 8 in a deformed state so that the inner surfaces of the second cuts 32 are crimped together.
[0181]
In this case, the valve portion 3 (first cut 31) of the valve body 7 is located in the opening 84, and the outer peripheral surface 71 (outer peripheral surface 71 in the vicinity of the first cut 31) of the valve portion 3 is opened. 84 is exposed.
[0182]
12 shows the mixed injection device 1 when viewed from the direction indicated by the arrow E in FIGS. 10 and 11, that is, the valve body from the intersection 33 between the first cut 31 and the second cut 32 shown in FIG. 7 shows the co-infusion device 1 when viewed from the direction of a straight line 111 that passes through a position shifted by 90 ° about the central axis of the valve 7 and is perpendicular to the axial direction of the valve element 7.
[0183]
Various conditions such as the shape and dimensions of the opening 84 of the housing 8 are as shown in FIG. 12, when the opening 84 is viewed from the direction of the straight line 111 (the direction indicated by the arrow E in FIGS. 10 and 11). 84 is set so that a part of the outer peripheral surface 71 of the valve body 7 can be seen.
[0184]
Thereby, in the opening 84 of the housing 8, for example, alcohol cotton or the like is slid in the horizontal direction in FIG. 11, that is, along the outer peripheral surface 71 of the valve body 7, so The outer peripheral surface 71) in the vicinity of one notch 31 can be easily and reliably wiped and can be cleaned.
[0185]
At this time, since the direction of the first notch 31 and the movement direction of the alcohol cotton substantially coincide, the first notch 31 does not substantially become a resistance, and the first notch 31 opens. The directional force does not act, and the first cut 31 can be kept closed.
[0186]
Further, since the housing 8 is cylindrical and the valve body 7 is inserted into the housing 8, the outer peripheral surface 71 of the valve portion 3 of the valve body is closer to the central axis side (inner peripheral surface than the outer peripheral surface of the housing 8. Located on the side).
[0187]
In other words, the housing 8 surrounds a portion where the first cut 31 of the valve body 7 exists on the outer peripheral side of the valve body 7 and in the vicinity of the first cut 31, and the first cut It has a part higher than the outer peripheral surface (outer surface) 71 of the site | part which 31 exists.
[0188]
The thickness (wall thickness) of the housing 8 is preferably about 0.2 to 10 mm, and more preferably about 0.5 to 5 mm.
[0189]
Further, the diameter of the opening 84 is preferably about 0.1 to 30 mm, and more preferably about 2 to 10 mm.
[0190]
This more reliably prevents humans (living bodies), objects, and the like from accidentally contacting the outer peripheral surface 71 (the outer peripheral surface 71 in the vicinity of the first notch 31) of the valve portion 3 of the valve body 7. It is possible to more reliably prevent bacteria and the like from adhering to the outer peripheral surface 71 of the valve portion 3 of the valve body 7.
[0191]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the third embodiment described above can be obtained.
[0192]
And in this mixed injection tool 1, as above-mentioned, while being able to clean the outer peripheral surface 71 (outer peripheral surface 71 of the vicinity of the 1st notch 31) of the valve part 3 of the valve body 7 easily and reliably, Without impairing the ease of this cleaning operation, it is possible to prevent or suppress peripheral instruments and the like from coming into contact with the outer peripheral surface 71 of the valve portion 3 of the valve body 7 and contaminating the outer peripheral surface 71.
[0193]
Moreover, compared with the case where the cover etc. which cover the valve part 3 of the valve body 7 are provided, a number of parts can be decreased and cost can be reduced.
[0194]
Next, an eighth embodiment of the mixed injection device of the present invention will be described.
FIG. 13: is a cross-sectional view which shows 8th Embodiment of the mixed injection tool of this invention. In addition, about a common point with the mixed injection tool 1 of 7th Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0195]
As shown in the figure, a pair of grooves 74 and 74 are formed along the axial direction on the outer peripheral portion of the valve body 7 of the co-infusion device 1.
[0196]
A pair of ribs (projections) 82, 82 that can engage with the pair of grooves 74, 74 are located at positions corresponding to the pair of grooves 74, 74 in the inner peripheral portion on the upper side in FIG. 13 of the housing 8. Is formed.
Thereby, rotation (displacement) of the valve body 7 with respect to the housing 8 is prevented.
[0197]
The pair of grooves 74 and 74 and the pair of ribs 82 and 82 constitute an engaging means.
[0198]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the seventh embodiment described above can be obtained.
[0199]
The valve body 7 of the co-infusion device 1 is provided with a groove 74, and the housing 8 is provided with a rib 82 that can be engaged with the groove 74. ) And the like can be prevented.
[0200]
Moreover, in this mixed injection tool 1, the valve body 7 can be easily attached to the housing 8 as compared with the case where the valve body and the housing are bonded with an adhesive. That is, the mixed injection device 1 can be easily manufactured (assembled).
[0201]
In the present invention, the housing 8 may be provided with a groove, and the valve body 7 may be provided with a rib that can be engaged with the groove.
[0202]
In the present invention, the engaging means is not limited to a combination of a groove and a rib, and other examples include a combination of a concave portion and a convex portion, and a combination of a groove and a convex portion.
[0203]
Next, a ninth embodiment of the mixed injection device of the present invention will be described.
14 is a perspective view showing a ninth embodiment of the mixed injection device of the present invention, FIG. 15 is a longitudinal sectional view of the mixed injection device shown in FIG. 14, and FIG. 16 is a sectional view taken along the line GG in FIG. (Longitudinal sectional view). In addition, about a common point with the mixed injection tool 1 of 7th Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated. For convenience of explanation, in FIGS. 14, 15, and 16, the upper side is described as “upstream” and the lower side is described as “downstream”.
[0204]
As shown in these drawings, the valve body 7 of the co-injection device 1 is bent so that the inner cavity 73 thereof is in a hex shape, and the valve portion 3 is provided in the bent portion 75.
[0205]
Further, the housing 8 is bent in the shape of a letter, and an opening 84 is formed in a portion corresponding to the valve portion 73 of the housing 8 and a portion in the vicinity thereof. That is, the valve portion 3 (first cut 31) of the valve body 7 is located in the opening 84, and the outer peripheral surface 71 (outer peripheral surface 71 in the vicinity of the first cut 31) of the valve portion 3 is opened. Is exposed from.
[0206]
Further, the vicinity of the second notch 32 of the valve body 7 is compressed in the lateral direction in FIG. 16 by the housing 8, whereby the inner surfaces of the second notch 32 are pressure-bonded.
[0207]
In order to apply such a compressive force to the valve body 7 by the housing 8, for example, the outer shape of the valve body 7 in the cross section is substantially elliptical in which the direction of the first notch 31 is the major axis (major axis) direction. And it is sufficient.
[0208]
A cylindrical connecting member 131 is fixed to an end portion of the housing 8 on the downstream side (the lower side in FIGS. 14 and 15). The upstream side of the tube 141 is fitted on the downstream side of the connecting member 131.
[0209]
Further, a cylindrical connecting member 132 is fixed to an end portion of the housing 8 on the upstream side (the upper side in FIGS. 14 and 15). The downstream side of the tube 142 is fitted on the upstream side of the connecting member 132.
[0210]
The lumen 73 of the valve body 7, the lumens of the connecting members 131 and 132, and the lumens of the tubes 141 and 142 constitute the main part of the flow path 61.
[0211]
As shown in FIG. 15, in this mixed injection device 1, the direction of the intersecting portion 33 between the first cut 31 and the second cut 32 and the lumen on the downstream side (one end side) from the bent portion 75 of the valve body 7. The axial direction of 73 coincides, and the lumen 73 downstream from the bent portion 75 is located on the extended line of the intersecting portion 33.
[0212]
That is, the intersecting portion 33 and the central axis of the lumen 73 downstream from the bent portion 75 coincide with each other.
[0213]
Thereby, a relatively long hard pipe can be inserted from the valve portion 3 of the valve body 7 into the flow path 61 (the lumen 73).
[0214]
Further, the surface formed by the axis of the lumen 73 downstream (one end side) from the bent portion 75 of the valve body 7 and the axis of the lumen 73 upstream (the other end side) from the bent portion 75 of the valve body 7. A first notch 31 is provided on the outer peripheral surface 71 of the valve body 7 so as to be orthogonal to (that is, the surface itself of FIG. 15). Furthermore, the 2nd cut 32 is provided in the internal peripheral surface 72 of the valve body 7, and the 2nd cut 32 exists on the same surface as this surface.
[0215]
Further, in the outer peripheral surface 71 of the valve body 7, the vicinity of the first cut 31 (the outer peripheral surface 71 in the valve portion 3) is a flat surface or a concave surface.
[0216]
In the present embodiment, the outer peripheral surface 71 of the valve portion 3 is a flat surface as shown in FIGS. 14 and 15, and its vertical line and the axial direction of the lumen 73 downstream from the bent portion 75 of the valve body 7. And are consistent. That is, the perpendicular line and the direction of the intersection 33 of the first cut 31 and the second cut 32 coincide with each other.
[0217]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the seventh embodiment described above can be obtained.
[0218]
And in this mixed injection tool 1, a comparatively long hard pipe can be inserted in the flow path 61 (inner cavity 73) from the valve part 3 of the valve body 7. FIG.
[0219]
That is, as shown in FIG. 14, the liquid medicine is sucked (inhaled) from a container in which a liquid medicine such as an ampoule or a vial is stored by an injection device 12 in which a blunt needle (tube body) 122 is connected to the tip of a syringe 121. ), The blunt needle 122 can be inserted through the valve portion 3 as it is without removing the blunt needle 122 and the chemical solution can be injected.
[0220]
This eliminates the hassle of removing the blunt needle 122 from the syringe 121, and prevents the drug solution from being contaminated when the blunt needle 122 is removed, or preventing a medicine such as an anticancer agent from coming into contact with the medical staff. The chemical solution can be injected easily, quickly and reliably.
[0221]
In addition, it is also possible to adjust the thickness (wall thickness) of the valve part 3 of the valve body 7 so that side injection can be performed using a relatively short hard pipe (tubular body).
[0222]
Needless to say, a hard pipe having a length equivalent to the thickness (wall thickness) of the valve portion 3 of the valve body 7 can be laterally poured.
[0223]
Next, a tenth embodiment of the mixed injection device of the present invention will be described.
17 is a perspective view showing a tenth embodiment of the mixed injection device of the present invention, FIG. 18 is a perspective view showing a configuration example of a valve body of the mixed injection device shown in FIG. 17, and FIG. 19 is an F- in FIG. It is sectional drawing (longitudinal sectional drawing) in F line. In addition, about a common point with the mixed injection tool 1 of 5th Embodiment mentioned above, description is abbreviate | omitted and a main difference is demonstrated.
[0224]
As shown in these drawings, a convex portion 76 is formed on the inner peripheral side of the valve portion 3 (in the vicinity of the intersecting portion 33) of the valve body 7 of the co-infusion device 1.
[0225]
In other words, in the axial direction and the circumferential direction of the valve body 7, the thickness of the valve portion 3 (the thickness in the vicinity of the intersecting portion 33), that is, the first cut 31 and the second cut 32 are located. The thickness of the valve body 7 is set so that the thickness of the portion is the thickest.
[0226]
The convex portion 76 is preferably relatively small and has a smooth shape. Thereby, the liquid can flow more smoothly and reliably.
[0227]
According to the mixed injection device 1, the same effect as the mixed injection device 1 of the fifth embodiment described above can be obtained.
[0228]
The mixed injection device of the present invention has been described based on the illustrated embodiments, but the present invention is not limited to these, and the configuration of each part is replaced with an arbitrary configuration having the same function. can do.
[0229]
For example, in the present invention, the arbitrary configurations of the respective embodiments may be appropriately combined.
[0230]
In the present invention, the shape of the valve body is not limited to a plate shape or a cylindrical shape.
In the present invention, only a part of the valve body may be made of an elastic material.
[0231]
The form (type) of the mixed injection device of the present invention is not particularly limited. For example, a mixed injection port of an infusion set such as a pump-type or gravity-type infusion set, a mixed injection manifold, a Y site, an artificial lung or an artificial lung Examples include a mixed injection / sampling port for the blood circuit of the kidney, a sampling port for the blood bag, and a check valve for preventing blood backflow when the indwelling needle is placed in the blood vessel.
Note that the mixed injection device of the present invention is not limited to medical use.
[0232]
【The invention's effect】
As described above, according to the mixed injection device of the present invention, for example, when connecting a syringe or a connector, a rod-shaped body (for example, a tubular body such as a hard pipe) is inserted from the first cut of the valve body. Therefore, the connection operation can be performed easily and safely (connection operability is good).
[0233]
Further, according to the mixed injection device of the present invention, not only when nothing is inserted (inserted) into the valve body, but also when a rod-like body is inserted, a rod-like body having a different outer diameter is inserted. In addition, even when the rod-shaped body is inserted and withdrawn, liquid tightness is ensured, and liquid leakage from the valve body can be reliably prevented.
[0234]
In addition, since the valve body is deformed so that the inner surfaces of the second cuts are pressed against each other, when the rod-shaped body is inserted for a long period of time, it is surely in a liquid-tight state even after the rod-shaped body is pulled out. The liquid leakage from the valve body can be surely prevented.
[0235]
Further, since the valve body is deformed so that the inner surfaces of the second cuts are pressure-bonded, even if the width of the first cut or the second cut is relatively large, liquid leakage from the valve body is prevented. Can be prevented.
[0236]
Further, by making the width of the first cut and the second cut relatively large, the frictional resistance at the time of inserting and pulling out the rod-shaped body can be made relatively small, whereby the rod-shaped body is inserted and pulled out. Etc. can be easily performed.
[0237]
Further, the valve body of the present invention has a simple structure.
In addition, when the valve body has a cylindrical shape, liquid tightness is more reliably ensured, and liquid leakage from the valve body can be more reliably prevented.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of a mixed injection device of the present invention.
2 is a perspective view showing a configuration example of a valve body in a natural state of the co-infusion device shown in FIG. 1. FIG.
FIG. 3 is a perspective view showing a second configuration example of the valve body in the natural state of the mixed injection device shown in FIG. 1;
FIG. 4 is a perspective view showing a second embodiment of the co-infusion device of the present invention.
5A is a cross-sectional view showing a configuration example of the valve body in the natural state of the co-infusion device shown in FIG. 4, and FIG. 5B is a cross-sectional view taken along the line CC in FIG. It is a figure (cross-sectional view).
6 (b) is a cross-sectional view showing a third embodiment of the mixed injection device of the present invention, and FIG. 6 (a) is a view of the valve body in the natural state of the mixed injection device shown in FIG. 6 (b). It is a cross-sectional view showing a configuration example.
7 (c) is a cross-sectional view showing a fourth embodiment of the mixed injection device of the present invention, and FIGS. 7 (a) and 7 (b) are mixed injections shown in FIG. 7 (c), respectively. It is a cross-sectional view which shows the structural example of the valve body in the natural state of a tool.
FIG. 8 is a cross-sectional view showing a fifth embodiment of the co-infusion device of the present invention.
FIG. 9 is a perspective view showing a sixth embodiment of the co-infusion device of the present invention.
FIG. 10 is a perspective view showing a seventh embodiment of the co-infusion device of the present invention.
11 is a cross-sectional view (transverse cross-sectional view) taken along the line DD in FIG.
12 is a side view of the co-infusion device shown in FIG.
FIG. 13 is a cross-sectional view showing an eighth embodiment of the co-infusion device of the present invention.
FIG. 14 is a perspective view showing a ninth embodiment of the co-infusion device of the present invention.
15 is a longitudinal sectional view of the mixed injection device shown in FIG.
16 is a cross-sectional view (longitudinal cross-sectional view) taken along line GG in FIG.
FIG. 17 is a perspective view showing a tenth embodiment of the mixed injection device of the present invention.
18 is a perspective view showing a configuration example of a valve body of the mixed injection device shown in FIG.
19 is a cross-sectional view (longitudinal cross-sectional view) taken along line FF in FIG. 18;
[Explanation of symbols]
1 Mixed injection tool
2 Disc
21 First end face
22 Second end face
3 Valve
31 First notch
32 Second notch
33 Intersection
4 Housing
41 Housing body
42 Lid member
421 opening
51 tubes
61 flow path
62 Hollow part
7 Disc
71 Outer surface
72 Inner surface
73 Lumen
74 Groove
75 bent part
76 Convex
8 Housing
81 groove
82 Ribs
83 Notch
84 opening
91 Connecting part
111 straight line
12 Injection device
121 syringe
122 Blunt needle
131, 132 connecting members
141, 142 tubes

Claims (11)

A co-infusion device comprising at least a part of a valve body made of an elastic material and a housing for holding the valve body, and having a flow path therein;
The valve body has a plate-like shape and has a first end face exposed to the outside and a second end face exposed in the flow path, and the valve body opens to the first end face. A first notch that does not open to the second end face, and a second notch that intersects the first notch inside, opens at the second end face, and does not open at the first end face. And
The valve body is deformed so that only the inner surfaces of the second cut are crimped by bending the valve body so that the first end face side is convex, and the first cut is closed. Held in the housing in a state
The first notch at the first end surface and the second notch at the second end surface are substantially orthogonal,
The direction of the flow path substantially coincides with the direction of the second cut at the second end surface,
The co-infusion device, wherein the bending direction and the first incision direction on the first end face substantially coincide with each other.   The co-infusion device according to claim 1, wherein a direction perpendicular to the direction of the curve and a direction of the second notch in the second end surface substantially coincide with each other.   The mixed injection device according to claim 1 or 2, wherein a compression force is applied to the entire valve body. A co-infusion device comprising at least a part of a valve body made of an elastic material and a housing for holding the valve body, and having a flow path therein;
The valve body has a first end surface exposed to the outside and a second end surface exposed in the flow path, the first end surface being an outer peripheral surface, and the second end surface being an inner peripheral surface. And at least part of the flow path is constituted by the lumen of the valve body,
The valve body has a first notch that opens at the first end surface and does not open at the second end surface, intersects the first notch inside, opens at the second end surface, and A second notch that does not open in the first end face is provided,
The valve body is deformed so that only the inner surfaces of the second cuts are pressure-bonded by being compressed by the housing in a direction substantially perpendicular to the axial direction of the valve body. Held in the housing with the notch closed,
The first notch at the first end surface and the second notch at the second end surface are substantially orthogonal,
The direction of the flow path substantially coincides with the direction of the second cut at the second end surface,
The co-infusion device, wherein a direction perpendicular to the axial direction of the valve body and a direction of the first notch in the first end face substantially coincide with each other.   The co-infusion device according to claim 4, wherein an axial direction of the valve body and a direction of the second notch in the second end face substantially coincide with each other.   The co-infusion device according to claim 4 or 5, wherein the outer shape of the cross-section of the valve body after deformation is substantially circular. The housing has a cylindrical shape having an opening on a side surface, and the first cut is located in the opening,
The valve body is inserted into the housing;
A direction of a straight line that passes through a position shifted by 90 ° about the central axis of the valve body from the intersection where the first cut and the second cut intersect, and is perpendicular to the axial direction of the valve body The mixed injection device according to any one of claims 4 to 6, wherein when viewed from the opening, a part of the outer peripheral surface of the valve body is visible from the opening.   7. The housing according to any one of claims 4 to 6, wherein the housing has a portion higher than an outer surface of a portion of the valve body where the first cut is present, on the outer peripheral side of the valve body and in the vicinity of the first cut. The mixed injection device according to any one of the above.   The housing is an outer peripheral side of the valve body, and surrounds a portion of the valve body where the first cut is present and is near a portion of the first cut. The mixed injection device according to any one of claims 4 to 6, wherein the mixed injection device has a portion higher than the outer surface.   The co-infusion device according to any one of claims 4 to 9, wherein engagement means for engaging the housing and the valve body is provided. The mixed injection device according to any one of claims 1 to 10 , wherein a portion of the first end surface near the first cut is a flat surface or a concave surface.

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