JP2005296139A - Medical syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly versatile syringe connectable to a connecting object appliance with no trouble without being affected by the presence/absence of a lock mechanism in the connecting object appliance of the syringe. <P>SOLUTION: This medical syringe is provided with a cylindrical lock part 130, in connected to a port, improving a retaining force of a lure part 140 to be inserted in the port. The lock part 130 is bored with through-holes 132a and 132b for inserting an insertion pin 160 in the outer circumferential face, and a through-hole 134 in the end part. The connecting pin 160 is provided with a fitting part to be fitted to the lure part, and is constituted to freely change its attitude into a lock part retaining attitude of inserting the connecting pin 160 into the through holes 132a and 132b till a position of executing the fitting with the lure 140 inserted in the through holes 132a and 132b and a connecting auxiliary member opening attitude of cancelling the lock part retaining attitude pulling out the connecting pin 160 from the through-hole 132a and the through-hole 132b and releasing the fitting. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a medical syringe, and more particularly to a technique for increasing the versatility of a syringe.

2. Description of the Related Art In recent years, various types of medical syringes such as so-called syringes have been manufactured. For example, there is a syringe provided with a lock mechanism for firmly connecting to a specific port (for example, Patent Document 1).
More specifically, as shown in FIG. 6A, the syringe 1000 has a cylindrical luer portion 1141 extending from an end portion of a syringe body portion 1121 that stores the chemical solution 1110. A bottomed cylindrical lock portion 1130 is rotatably fitted between a step portion 1143 provided at substantially the center and an end portion of the syringe body portion 1121, and an opening portion of the syringe body portion 1121. The plunger 1150 is inserted into the.

A through-hole through which the luer part 1141 is inserted is provided on the bottom surface of the lock part 1130, and the luer part 1141 is forcibly fitted into the through-hole.
In the mixed injection port 1200, a rubber valve body 1204 to which the luer part 1141 of the syringe 1000 is inserted is inscribed in the cylindrical cover main body part 1202 on the side surface of the port main body part 1201 that becomes a flow path such as an infusion line. , Sandwiched.

The cover body 1202 has a screw portion 1203 that is screwed with the lock portion 1130.
If the syringe 1000 is to be connected to the mixed injection port 1200, the person who performs the connection tightens the lock portion 1130 while rotating the lock portion 1130 while inserting the luer portion 1141 into the slit provided in the valve body 1204. Become.

By the way, what makes a syringe and connection partner apparatuses, such as a mixed injection port, easy to remove using a connection auxiliary tool, such as the lock part 1130, is called a luer lock type.
On the other hand, a structure having a structure in which a syringe and a connected device of the syringe can be easily inserted and removed is called a luer slip type.

More specifically, the luer slip type syringe is different from the luer lock type syringe in that there is no connection auxiliary tool such as the lock portion 1130, for example.
In addition, the luer slip type co-infusion port is different from the luer slip type co-infusion port in that a fitting portion such as a screw portion corresponding to the lock portion 1130 is not provided.

Normally, a combination of a luer lock type syringe and a luer lock type mixed injection port, or a combination of a luer slip type syringe and a luer slip type mixed injection port will be used. Since both types of co-infusion ports may be used, there is a desire to use a combination of a luer lock type syringe and a luer slip type co-infusion port as shown in FIG.
Japanese Utility Model Publication No. 6-66641

However, as described above, connecting a luer lock type syringe to a luer slip type mixed injection port is a method of use that is not originally assumed, and therefore, for example, as shown in FIG. In some cases, the cover main body portion 1202 of 1200 and the lock portion 1130 of the syringe 1000 interfere with each other and cannot be connected.
Thus, the problem in the versatility of the syringe provided with the connection assisting member is desired to be improved promptly from the request of the medical site that is required to respond quickly and accurately.

  The present invention has been made in view of the above problems, and its purpose is not to be affected by the presence or absence of a locking mechanism in a syringe connection partner device, and is versatile enough to be connected to the connection partner device without any inconvenience. It is to provide a high syringe.

  In order to achieve the above object, the syringe according to the present invention is a medical syringe provided with a cylindrical connection assisting member that increases the holding force of the luer part inserted into the port when connecting to the port. The connection assisting member has a first insertion hole through which the pin is inserted in the outer peripheral surface, a second insertion hole is formed in the end, and the pin is fitted into the luer part. A connection auxiliary member holding posture for inserting the pin into the first insertion hole to the position where the fitting is performed in a state where the luer part is inserted into the second insertion hole. It is characterized by having a configuration in which the posture can be freely changed to the opening posture of the connection auxiliary member that is extracted from the first insertion hole and releases the fitting.

  The syringe according to the present invention is a medical syringe provided with a cylindrical connection auxiliary member that increases the holding force of the luer portion inserted into the port when connected to the port, and the connection auxiliary member has an outer periphery. A first insertion hole through which a pin is inserted is formed in a surface, a second insertion hole is formed in an end portion, and the pin has a fitting portion to be fitted into a luer portion; In a state where the luer part is inserted into the two insertion holes, the connection auxiliary member holding posture for inserting the pin into the first insertion hole to the position where the fitting is performed, and the pin is extracted from the first insertion hole and A configuration in which the posture can be freely changed to the connection auxiliary member opening posture for releasing the fitting is provided.

  Thereby, by extracting the pin and removing the connection auxiliary member from the syringe, the syringe can be used as a so-called luer slip type syringe, and further, the pin is inserted into the connection auxiliary member. By engaging the luer part and the connection auxiliary member, the syringe can be used as a so-called luer lock type syringe.

That is, since the syringe functions as both of these types, versatility is enhanced.
Further, the luer part has a substantially cylindrical shape having a small-diameter part in which the diameter in the vicinity of the central part or the base part is locally narrowed, and the insertion path of the pin is a central axis of the connection assisting member It is on a line connecting the outer peripheral surfaces facing each other through the vicinity, and the fitting is performed by fitting the fitting portion of the pin into the small diameter portion of the luer portion in the vicinity of the central axis of the connection assisting member. May be made.

With this configuration, the central axis of the lure part and the central axis of the connection auxiliary member are matched or close to each other.
Usually, the luer lock type connection counterpart device is located at the center of an engaging structure such as a threaded portion or a groove portion where the insertion portion of the luer portion engages, so that the center axis of the luer portion and the connection Since the center axis of the auxiliary member substantially coincides, the insertion can be performed while being fitted.

Further, the fitting may be performed such that the pin is rotatable with the central axis of the small diameter portion as a rotation axis.
Thereby, without rotating the syringe itself, the syringe and the luer lock type counterpart device can be connected and fixed by rotating only the connection assisting member.

The pin may be provided with a handle portion to be picked when the pin is inserted or removed.
This facilitates the insertion and removal of the pin.

(Embodiment)
Fig.1 (a), (b), (c) and (d) are the figures explaining the syringe in this embodiment.
The syringe 100 is a prefilled syringe that can be quickly inserted into and extracted from both the luer lock type co-infusion port and the luer slip type co-infusion port and in which the medicinal solution 110 is sealed in advance.

As shown in FIG. 1A, the syringe 100 is sealed with a plunger unit 150 after a drug solution 110 is filled in a cylindrical syringe unit 120, and is connected to one end of the syringe unit 120 (an example of a connection auxiliary member). The lock portion 130 is rotatably connected via a connecting pin 160 (as an example of a pin).
The syringe part 120 has a cylindrical luer part 140 extending from one end (hereinafter referred to as “first end”) of the cylindrical syringe body 121, and an end opposite to the first end (hereinafter referred to as “ The flange portion 121a is arranged at the “second end”.

The luer part 140 is cylindrical and has a first luer part 144 having a diameter d1 located on the root side thereof, and a tapered second second part located on the tip side and having a tip part diameter d2 and a rear end part diameter d3. It consists of a luer part 141 and has a relationship of d3> d2 and d3> d1.
The lock portion 130 is a bottomed cylindrical nut made of a resin material for engaging with a syringe connection counterpart device, and a through hole 134 having a diameter d4 is provided on the bottom surface thereof. On the cylindrical side surface, through holes 132a and 132b having a rectangular opening are provided.

In addition, the value of d4 is larger than the value of d3 so that the 2nd luer part 141 can pass the through-hole 134. FIG.
The connecting pin 160 is a substantially U-shaped pin that engages the lock portion 130 and the luer portion 140, and fits into the lock portion 130 in a state of penetrating the outline of the lock portion 130, and the first luer portion. 144 has a function of engaging with 144.

  More specifically, as shown in FIG. 1D in which the connecting pin 160 is sliced parallel to the main surface in the fitted state, the connecting pin 160 is a substantially U-shaped pin, and has a rectangular base. Two extending portions 163 that are symmetrical to each other are extended from the portion 161, and at the base of these extending portions 163, a stepped portion 162 that comes into contact with the lock portion 130 at the time of insertion is provided. The protrusions 163a are provided on the outer sides in the vicinity of the distal ends of the extending portions 163, respectively.

A recess 165 that fits with the first luer part 144 is provided at the center of the groove 164 formed between the two extending parts 163.
The syringe 100 may be in a state in which the lock part 130 and the connecting pin 160 are removed in the delivery state or in an attached state. The description will be made assuming that the connecting pin 160 is in a removed state.
(How to use the syringe)
Hereinafter, a method of using the syringe 100 will be described.
(Connection to lure lock type mixed injection port)
A person who intends to connect the syringe 100 to the mixed injection port (hereinafter referred to as “operator”), when the mixed injection port is a luer lock type, as shown in FIG. After inserting the luer part 140 into 134, as shown in FIG. 1 (b), the connecting pin 160 is inserted into the through holes 132a and 132b of the lock part 130, as shown in FIGS. 2 (a) to (f). Then, it is pushed in until the end surfaces of the stepped portion 162 of the lock portion 130 come into contact with the end surfaces 162a on both sides of the through hole 132a.

At this time, the protrusion 163a of the connecting pin 160 gets over the contact portion 162b at both ends of the through hole 132b and suppresses movement in the direction opposite to the insertion direction, and the first luer portion 144 fits into the recess 165. .
At this time, the first luer part 144 and the lock part 130 are engaged so as to be positioned concentrically.

Further, since the contact surfaces of the first luer part 144 and the concave part 165 of the connecting pin 160 slip in the circumferential direction, the first luer part 144 and the lock part 130 are set with the central axis of the first luer part 144 as the rotation axis. And rotate relative to each other.
The above-described mixed injection port 200 is a luer lock type mixed injection port, and is a rubber valve provided with a slit 204a on a branch path provided on a side surface of the port body 201 serving as a flow path of an infusion line or the like. A body 204 is covered and sandwiched by a cylindrical cover main body 202, and a screw groove 203 is formed on the outer periphery of the cover main body 202.

When the syringe 100 is connected to the mixed injection port 200, the operator rotates the lock unit 130 while inserting the second luer portion 141 of the syringe 100 into the slit 204a of the mixed injection port 200, as shown in FIG. Thus, the syringe 100 and the mixed injection port 200 can be firmly connected by being engaged with the screw groove 203.
(Connection to lure slip type mixed injection port)
When the syringe 100 is connected to the luer slip type mixed injection port 210, the operator connects the second luer part 141 to the mixed injection port 200 in a state where the lock part 130 is not attached to the syringe 100 as shown in FIG. 3. By inserting into the slit 204a, the syringe 100 and the mixed injection port 200 can be quickly connected.

As described above, the syringe 100 of the present embodiment can be easily attached and detached by inserting and removing the connecting pin 160. Therefore, when connecting with a luer slip type counterpart device, the syringe 100 is locked. By removing the portion 130 from the syringe 100, a smooth connection can be performed as in the case of a conventional luer slip type syringe.
Moreover, when connecting with a luer lock type connection other party instrument, by attaching the lock | rock part 130 to the syringe 100, a strong connection can be implemented similarly to the conventional luer lock type syringe.

  In the present embodiment, the first luer part 144 and the lock part 130 can be relatively rotated. However, the present invention is not limited to this. For example, a tube is provided on the outer surface of the first luer part 144 of the syringe 100. A spline parallel to the axial direction (hereinafter referred to as “first spline”) is provided, and a spline corresponding to the first spline (hereinafter referred to as “second spline”) is further provided in the recess 165 of the connecting pin 160. Thus, when the concave portion 165 is fitted into the first luer portion 144, the first and second splines may be alternately fitted to fix the first luer portion 144 and the concave portion 165 in position.

In that case, the syringe 100 and the lock part 130 are relatively unrotatable, but the lock part 130 and the first luer part 144 are concentric, so the second luer part 141 is placed at the target location. By rotating the entire syringe 100 while being inserted, the nuts can be combined.
Moreover, in this embodiment, although the lock part 130 in the syringe 100 was a nut for engaging with instruments, such as a mixed injection port, this is an example to the last and does not necessarily need to be a nut.

For example, as shown in FIG. 4, a lock part 132 having claw parts 133a and 133b may be used instead of the lock part 130 having a screw.
In that case, with the change of the locking mechanism on the syringe side, for example, the structure of the engaging portion in the luer lock type mixed injection port needs to be the same as the mixed injection port 220 having two L-shaped grooves 231a. .

In addition, the shape of the connecting pin 160 is substantially U-shaped, but this is merely an example, and the same function, that is, the role of fixing the lock portion 130 and the luer portion 140 at a predetermined position. Any shape can be used as long as it is a pin.
As an example of this, as shown in FIG. 5 (corresponding to FIG. 1 (d)), one of the two extending portions 163 in the connecting pin 160 is played on the lock portion side. Alternatively, a lock portion 170 whose cross-sectional shape is partially reviewed and a connecting pin 180 in which one of the two extending portions 163 is omitted may be used.

  The present invention can be applied to manufacture of a medical syringe used in a medical field where various types of connection ports are used.

It is a figure explaining the use condition of the syringe in this embodiment. It is a figure which shows the insertion condition to the locking part of a connection pin. It is a figure which shows the insertion condition to the lure slip type mixed injection port of the syringe in this embodiment. It is a figure which shows an example of what implement | achieves the locking mechanism of a syringe with things other than a nut. It is a figure which shows an example in the case of engaging a lock | rock part and a syringe using the connection pin of shapes other than the connection pin shape demonstrated in this embodiment. It is a figure explaining the use condition of the conventional luer lock type syringe. It is a figure explaining the use condition of the conventional luer lock type syringe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Syringe 110 Chemical solution 120 Syringe part 121 Syringe main part 121a Flange part 130, 132 Lock part 132a, 132b Through-hole 133a, 133b Claw part 134 Through-hole 140, 141, 144 Luer part 150 Plunger part 160 Connecting pin 161 Base part 162 Step Portion 162a End surface 162b Contact portion 163 Extension portion 163a Protrusion portion 164 Groove 165 Recess 170 Lock portion 180 Connecting pin 200 Mixed injection port 201 Port main body portion 202 Cover main body portion 203 Screw groove portion 204 Valve element 204a Slit 210, 220 Mixed injection port 231a groove

Claims (4)

When connecting to a port, a medical syringe provided with a cylindrical connection assisting member that increases the holding power of the luer part inserted into the port,
The connection auxiliary member has a first insertion hole through which the pin is inserted in the outer peripheral surface, and a second insertion hole is formed in the end portion,
The pin has a fitting portion that fits with the lure portion,
With the luer portion inserted into the second insertion hole, a connection auxiliary member holding posture for inserting the pin through the first insertion hole to the position where the fitting is performed,
A medical syringe comprising a configuration in which the posture can be freely changed to a connection assisting member opening posture in which the pin is extracted from the first insertion hole to release the fitting. The luer part has a substantially cylindrical shape having a small diameter part in which the diameter in the vicinity of the central part or the base part is locally narrowed,
The insertion path of the pin is on a line connecting the outer peripheral surfaces facing each other through the vicinity of the central axis of the connection auxiliary member,
The medical syringe according to claim 1, wherein the fitting is performed by fitting a fitting portion of the pin into a small diameter portion of the luer portion in the vicinity of the central axis of the connection assisting member.   The medical syringe according to claim 2, wherein the fitting is performed such that the pin is rotatable about a central axis of the small diameter portion as a rotation axis.   The medical syringe according to any one of claims 1 to 3, wherein the pin is provided with a handle portion to be picked when the pin is inserted and removed.

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