JP4522071B2 - Syringe - Google Patents

Description

  The present invention relates to a syringe.

  In the medical field, various medical instruments such as syringes, injection needles, catheters, infusion sets, and the like may be connected to each other.

  In this connection method, for example, a method of fitting a male taper portion provided in a male connector provided at an end portion of the other medical instrument into a lumen portion of a female connector provided at an end portion of one medical instrument. There is.

  Also, some female connectors have screw grooves (female side threaded portions) formed on the outer peripheral surface thereof. Correspondingly, the male connector also has a female connector on the outer peripheral portion of the male tapered portion. Some of them are provided with a connecting member in which a screw thread (male side screwing portion) to be screwed into the screw groove is formed. Thereby, connection with a female connector and a male connector can be made stronger (for example, refer to patent documents 1).

  However, in the male connector having such a configuration, the connection member is fixed and is relatively immovable along the axial direction of the male connector (see FIG. 1 of Patent Document 1) or connected. That is, the member is relatively movable along the axial direction of the male connector (see FIG. 2 of Patent Document 1). For this reason, when it is going to connect the female connector in which the thread part is not formed in the outer peripheral surface to a male taper part, a connection member may become obstructive and these connections may not be performed reliably.

  As a male connector which solves such a problem, there is one configured so that the connection member can be relatively moved along the axial direction of the male connector and the entire male taper portion can be exposed (see, for example, Patent Document 2). .

  In this male connector, a predetermined operation, that is, an operation of rotating the connection member (lock nut portion 3) relative to the male taper portion (male luer portion 5) by a predetermined angle is performed. It becomes possible to relatively move along the axial direction. And the whole male taper part can be exposed by moving a connection member in the direction away from a male taper part. In addition, the code | symbol used here is a code | symbol described in patent document 2. FIG.

  However, in such a male connector, unless the predetermined operation is performed, the connecting member cannot be relatively moved along the axial direction of the male connector, so that it is extremely complicated to perform the operation of exposing the male tapered portion. It is.

  In addition, since the connecting member is not fixed with the male tapered portion exposed, the connecting member is in the axial direction of the male connector when performing an operation of connecting the female connector having no thread groove on the outer peripheral surface to the male tapered portion. May also interfere with this operation.

  By the way, among medical instruments, in particular, syringes are frequently used, and those that can be reliably connected to various medical instruments are required.

Japanese Utility Model No. 2-193 JP 7-148271 A

  An object of the present invention is to provide a syringe that can easily and reliably connect a female connector having a female-side threaded portion on an outer peripheral surface and a female connector not having the female connector.

Such an object is achieved by the present invention of the following (1) to ( 10 ).
(1) A syringe that can be alternatively connected to a first female connector at a distal end and a second female connector having a female-side threaded portion on an outer peripheral surface,
An outer cylinder main body having a bottomed cylindrical shape, and a mouth part integrally formed at a distal end portion of the outer cylinder main body, the inner cavity of the first female connector and the second female connector A syringe outer cylinder having a male taper portion that fits into the lumen portion, and having a mouth portion formed with a flow path through which liquid can pass ;
A lock adapter provided on the outer peripheral portion of the mouth portion so as to be relatively movable along the axial direction of the mouth portion, and having a male side screwing portion screwed into the female side screwing portion on the inner peripheral surface; Have
The lock adapter includes a distal end side of the mouth portion in which the male taper portion fits into a lumen portion of the second female connector, and the male screw portion is screwed into the female screw portion. when the distal end side fixing location which is fixed, perform an operation of fitting the Osutepa portion to the lumen of the first female connector by pressing or engagement with respect to the mouth portion when in the syringe, characterized in that from the front end side fixing position in which retracted to the retracted position of the base end side.

(2) The mouth portion has a plurality of ribs formed on the outer peripheral surface of the proximal end portion of the male taper portion and extending along the axial direction.
The lock adapter has a ring-shaped protrusion along the circumferential direction, formed on the inner peripheral surface of the portion on the proximal end side of the male side screwing portion, and has a distal end side fixed position and the The syringe according to (1), wherein the protrusion is fixed in pressure contact with each rib at each retracted position.

(3) The mouth portion is formed to protrude from the outer peripheral surface at a portion closer to the base end side than the male taper portion, and extends along the axial direction, and a distal end between the adjacent ribs. It has a stopper part composed of a protruding part that protrudes from the side part,
The lock adapter has a claw that is formed on the inner peripheral surface of the portion on the proximal end side of the male side screwing portion and is inserted between the ribs. The syringe according to (1), wherein the nail is fixed by being engaged with the stopper portion.

(4) Each of the ribs has a deficient part that is missing in the middle,
Between the retracted position and the distal-end-side fixed position, there is a rotatable position where the lock adapter can rotate relative to the mouth ,
The lock adapter has a ring-shaped protrusion along the circumferential direction, formed on the inner peripheral surface of the lock adapter at a position proximal to the male-side threaded portion, and the protrusion is rotatable. The syringe according to (2) or (3) , wherein the syringe can rotate while facing the defect portion at a position .

  (5) The syringe according to any one of (1) to (4), wherein when the lock adapter is in the retracted position, the male taper portion protrudes 7.5 mm or more from a tip of the lock adapter.

( 6 ) When the said lock adapter exists in the said front end side fixed position, the said male taper part is a syringe in any one of said (1) thru | or (5) which protrudes 2.1 mm or more from the front-end | tip of the said lock adapter.

( 7 ) The syringe according to any one of (1) to ( 6 ), wherein the lock adapter is relatively movable by 5.4 mm or more along the axial direction of the mouth portion.

( 8 ) The syringe according to any one of (1) to ( 7 ), wherein an inner diameter (average) of the mouth is 1.2 mm or more.

( 9 ) The syringe according to any one of (1) to ( 8 ), wherein the mouth has a length of 16 to 20 mm.

( 10 ) having a gasket that can slide in the syringe outer cylinder;
When the gasket is positioned on the tip of the syringe outer tube, any one of the volume of the space defined between the gasket and the syringe barrel is above (1) to less than 0.1 mL (9) The syringe according to 1.

  According to the present invention, it is possible to easily and reliably connect any of a female connector having a female-side threaded portion on the outer peripheral surface and a female connector not having this.

  In addition, the male taper portion of the first female connector can be adjusted by appropriately setting the movement distance of the lock adapter relative to the mouth portion, the protruding length of the male taper portion from the lock adapter when the lock adapter is in the retracted position, and the like. The operation of fitting into the cavity can be performed more easily and reliably, and as a result, the first female connector can be more reliably connected.

  Further, the second female connector can be more firmly fixed by providing the distal end side fixing position.

Hereinafter, the syringe of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
<First Embodiment>
FIG. 1 is a half vertical cross-sectional view of a first embodiment of the syringe of the present invention, and FIGS. 2 to 4 are partial vertical cross-sectional views of the distal end portion of the syringe shown in FIG. For convenience of explanation, the right side of FIGS. 1 to 4 (the same applies to FIGS. 5 to 8) is referred to as “base end”, and the left side is referred to as “tip”.

  A syringe 1 shown in FIG. 1 includes an outer cylinder (syringe outer cylinder) 2, a gasket 3 that can slide in the outer cylinder 2, and a pusher (plunger rod) 4 that moves the gasket 3. The gasket 3 is connected to the tip of the pusher 4.

  The outer cylinder 2 has a bottomed cylindrical outer cylinder main body 21, and a mouth portion 22 whose diameter is reduced with respect to the body portion of the outer cylinder main body 21 is integrally formed at the tip thereof.

  A flow path 221 through which liquid can pass is formed inside the mouth portion 22 and communicates with a lumen portion (a space 24 described later) of the outer cylinder main body 21.

  The mouth portion 22 is provided with a male taper portion 222 at the tip thereof, and a lock adapter (connecting member) 23 is provided on the outer peripheral portion of the mouth portion 22. The configurations of the mouth portion 22 and the lock adapter 23 will be described in detail later.

  A plate-like flange 25 is integrally formed on the outer periphery of the base end of the outer cylinder 2 (outer cylinder main body 21). When the pusher 4 is moved relative to the outer cylinder 2, the operation can be performed by placing a finger on the flange 25.

  As a constituent material of the outer cylinder 2 and the lock adapter 23 described later, for example, polyvinyl chloride, polyethylene, polypropylene, cyclic polyolefin, polystyrene, poly- (4-methylpentene-1), polycarbonate, acrylic resin, acrylonitrile- Polybutadiene such as butadiene-styrene copolymer, polyethylene terephthalate, polyethylene naphthalate, butadiene-styrene copolymer, polyamide (for example, nylon 6, nylon 6,6, nylon 6,10, nylon 12), ethylene-vinyl alcohol Various resins such as polymers, polyallylsulfone, polyethersulfone, methacryl-styrene copolymer, polyarylate, styrene-acrylonitrile copolymer can be mentioned. Among them, molding is easy. In terms of that, polypropylene, cyclic polyolefins, polyesters, poly - (4-methylpentene-1) resin such as is preferred.

  In addition, it is preferable that the constituent material of the outer cylinder 2 and the lock adapter 23 is substantially transparent in order to ensure internal visibility.

  Moreover, the scale 26 is formed in the outer peripheral surface of the outer cylinder 2 (refer FIG. 1). Thereby, the liquid amount of the liquid in the syringe 1 can be grasped.

  In such an outer cylinder 2 (outer cylinder main body 21), a gasket 3 made of an elastic material is accommodated. A plurality of ring-shaped protrusions 31 and 32 are formed on the entire outer periphery of the gasket 3. By sliding the protrusions 31 and 32 in close contact with the inner peripheral surface 20 of the outer cylinder 2, the air tightness (liquid tightness) can be more reliably maintained and the slidability can be improved.

  In the present embodiment, two protrusions 31 and 32 are formed along the longitudinal direction of the gasket 3. That is, protrusions 31 and 32 are formed on the base end portion and the tip end portion of the gasket 3, respectively.

  In the present invention, the position and number of the protrusions 31 and 32, the cross-sectional shape, and the like are not limited thereto.

  Further, the gasket 3 is formed with a hollow portion opened to the base end surface. A head portion of a pusher 4 to be described later is inserted (inserted) into the hollow portion.

  The constituent material of the gasket 3 is not particularly limited. For example, various rubber materials such as natural rubber, butyl rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, silicone rubber, fluororubber, polyurethane, polyester, Examples thereof include various thermoplastic elastomers such as polyamide, olefin, and styrene, or elastic materials such as a mixture thereof.

  The gasket 3 may have a configuration in which, for example, a core portion (not shown) made of a resin material is provided, and an elastic material is arranged so as to cover the outer periphery of the core portion. In this case, a hollow part is formed in the core part.

  Further, a gasket in which the whole or a part of the gasket 3 is laminated with a resin may be used. Examples of the resin used for the laminate include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroethylene copolymer (PFA), ethylene-tetrafluoroethylene copolymer (ETFE), and tetrafluoroethylene-hexafluoropropylene copolymer. Examples thereof include a fluororesin such as a polymer (FEP) and a high molecular weight polyethylene.

  The gasket 3 is connected (attached) with a pusher 4 for moving the gasket 3 in the longitudinal direction within the outer cylinder 2.

  The pusher 4 has a main body portion 40 mainly composed of a plate piece having a cross-shaped cross section, a plate member 41 at the distal end, and a flange-like (plate-like) finger rest at the proximal end. 42 are formed integrally with the main body 40, respectively. The pusher 4 is moved in the distal direction by pressing the finger rest 42 with a finger or the like.

  Further, a head portion (connecting portion) that is inserted into the hollow portion of the gasket 3 and connected to the gasket 3 is formed at the tip of the main body portion 40. By inserting and fitting the head portion into the hollow portion of the gasket 3, the gasket 3 and the pusher 4 are connected.

  As a constituent material of the pusher 4, for example, polyvinyl chloride, polyethylene, polypropylene, polystyrene, poly- (4-methylpentene-1), polycarbonate, acrylic resin, acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, polyethylene Various resins such as polyesters such as naphthalate, butadiene-styrene copolymers, and polyamides (for example, nylon 6, nylon 6,6, nylon 6,10, nylon 12) can be mentioned. Among them, molding is easy. In that respect, resins such as polypropylene, polyester, and poly- (4-methylpentene-1) are preferred.

  As described above, since the gasket 3 and the pusher 4 are connected by the fitting structure, the connection can be reliably performed, and the gasket 3 and the pusher 4 are detached as the pusher 4 is operated. In addition, the pusher 4 can be easily attached to and detached from the gasket 3.

  In the present invention, the connection structure between the gasket 3 and the pusher 4 may be other than fitting, for example, fixing such as adhesion or fusion, screwing, or the like.

  In the syringe 1, the liquid is stored in a space 24 (including the flow path 221 of the mouth portion 22) defined by the gasket 3 and the outer cylinder 2. The volume of the space 24 is not particularly limited, but the volume (dead volume) when the gasket 3 is moved and positioned at the tip in the outer cylinder 2 is preferably 0.1 mL or less, and 0.07 mL or less. It is more preferable that Thereby, especially when using an expensive chemical as the liquid, it is possible to effectively use the expensive chemical without wasting it.

  Such a syringe 1 has a first female connector 9 as shown in FIG. 3 and a thread groove (female side screwing portion) 101 formed on the outer peripheral surface as shown in FIG. The second female connector 10 can be alternatively connected. Hereinafter, this point (feature) will be described in detail.

  As described above, the mouth portion 22 is formed integrally with the outer tube body 21 at the distal end portion of the outer tube body 21, and the lock adapter 23 is provided on the outer periphery of the mouth portion 22.

  The mouth portion 22 includes a male taper portion 222 whose outer diameter and inner diameter gradually decrease in the distal direction at the distal end portion. The male taper portion 222 fits into the lumen portion 91 of the first female connector 9 and the lumen portion 102 of the second female connector 10.

  The taper gradient of the male taper portion 222 is not particularly limited, but is, for example, about 4/100 to 8/100, and more preferably 6/100.

  The inner diameter (average) of the mouth portion 22 is not particularly limited, but is preferably 1.2 mm or more, and more preferably about 1.5 to 2.5 mm. The length of the mouth portion 22 (length L in FIG. 2) is not particularly limited, but is preferably about 16 to 20 mm, and more preferably about 17 to 18.5 mm. By setting the dimension of the mouth portion 22 in the above range, the dead volume of the syringe 1 can be further reduced.

  The lock adapter 23 is relatively rotatable around the mouth portion 22 and is relatively movable along the axial direction of the mouth portion 22. On the inner peripheral surface of the lock adapter 23, a screw thread (male side screwing portion) 232 that is screwed into the screw groove (female side screwing portion) 101 of the second female connector 10 is formed.

  A plurality of ribs (convex portions) 233 are formed on the outer peripheral surface of the lock adapter 23 along the axial direction thereof. The rib 233 has a function of preventing slipping when the lock adapter 23 is gripped with a finger or the like and rotated.

  The second female connector 10 is connected to the distal end portion of the syringe 1 by fitting the male taper portion 222 into the lumen portion 102 and screwing the screw thread 232 of the lock adapter 23 into the screw groove 101. (See FIG. 4).

  On the other hand, the 1st female connector 9 is connected to the front-end | tip part of the syringe 1 by the male taper part 222 fitting to the lumen | bore part 91 (refer FIG. 3). Here, when the lock adapter 23 is present on the outer peripheral portion in the vicinity of the male taper portion 222, the lock adapter 23 becomes an obstacle when performing an operation of fitting the male taper portion 222 into the lumen portion 91 of the first female connector 9. In some cases, the operation cannot be performed reliably.

  Therefore, in the present invention, when the operation of fitting the male taper portion 222 to the lumen portion 91 of the first female connector 9 is performed, the lock adapter 23 can be retracted to a position on the proximal end side that does not interfere with the operation. And it was comprised so that it might fix to the mouth part 22 in this retracted position (position shown in FIG. 3). Thereby, the operation of fitting the male taper portion 222 to the lumen portion 91 of the first female connector 9, that is, the operation of connecting the first female connector 9 to the distal end portion of the syringe 1 can be easily and reliably performed. it can.

  A ring-shaped protrusion 231 that protrudes toward the central axis is formed on the inner peripheral surface of the base end portion of the lock adapter 23, and the base end side outer peripheral surface of the mouth portion 22 extends along the axial direction. A plurality of (four in this embodiment) ribs 223 projecting outward are formed.

  In the retracted position, the lock adapter 23 is fixed to the mouth portion 22 by the protrusions 231 (a part of the inner peripheral surface) of the lock adapter 23 being pressed against the ribs 223. That is, the lock adapter 23 is fixed to the mouth portion 22 by fitting at the retracted position. With such a configuration, the operation of fixing the lock adapter 23 to the mouth portion 22 can be reliably performed, and the release operation can be easily performed when performing the operation of releasing the fixation. Moreover, by setting it as such a structure, the fixing force (fitting force) to the opening | mouth part 22 of the lock adapter 23 can be easily adjusted by setting suitably the installation number of the rib 223, a width | variety, etc., for example. There is also an advantage of being able to

  The plurality of ribs 223 are provided at substantially equal intervals along the circumferential direction of the mouth portion 22. Thereby, since the fixing | fixed to the circumferential direction of the opening | mouth part 22 of the lock adapter 23 can be performed more uniformly (uniformly), these can be fixed more stably.

  The height of the tip portion of the rib 223 is gradually reduced toward the tip direction. That is, the tip surface of the rib 223 forms an inclined surface. Thereby, when performing the operation of moving the lock adapter 23 to the retracted position, the operation can be performed more smoothly without the protrusion 231 of the lock adapter 23 being caught by the edge of the rib 223.

  It should be noted that the lock adapter 23 may not be fixed at such a retracted position.

  In addition, the fixing force of the lock adapter 23 to the mouth portion 22 in the retracted position is not particularly limited. For example, the lock adapter 23 is moved by its own weight in a state where the distal end side of the syringe 1 (mouth portion 22) is directed vertically downward. It is assumed that the force does not move or more. Thereby, it is possible to prevent the lock adapter 23 from easily moving from the retracted position.

  When the lock adapter 23 is in the retracted position, the protruding length (length A in FIG. 3) of the male taper portion 222 from the tip of the lock adapter 23 is preferably 7.5 mm or more, and 7.5 to 9 More preferably, it is about 0.0 mm. If the protruding length is too short, the male taper portion 222 cannot be reliably fitted to the inner cavity portion 91 of the first female connector 9 depending on the length (full length) of the first female connector 9 or the like. On the other hand, if the protruding length is made longer than the upper limit, the entire length of the syringe 1 becomes too large, which is not preferable.

  Further, the syringe 1 has a rotatable position (see FIG. 2) at which the lock adapter 23 can rotate around the mouth portion 22 on the tip side from the retracted position. That is, as shown in each drawing, the mouth portion 22 has a portion where the rib 223 is not provided, and the lock adapter 23 is connected to the mouth portion 22 in a state where the protrusion 231 of the lock adapter 23 is located at this portion. It is relatively rotatable around the center.

  Furthermore, the syringe 1 has a distal end side fixed position (see FIG. 4) where the lock adapter 23 is fixed to the mouth portion 22 on the distal end side from the rotatable position.

  In a state where the lock adapter 23 is in a rotatable position, the male taper portion 222 is fitted into the inner cavity portion 102 of the second female connector 10, and the screw thread 232 is screwed into the screw groove 101. Although the connector 10 can be connected to the distal end portion of the syringe 1, the lock adapter 23 is further moved to the distal end side fixed position, and the proximal end of the second female connector 10 is located on the far side of the lock adapter 23. Thus, by connecting the second female connector 10 to the distal end portion of the syringe 1 (see FIG. 4), these connections can be made stronger.

  A plurality (four in this embodiment) of ribs 226 projecting outward along the axial direction is formed on the outer peripheral surface of the mouth portion 22 on the proximal end side from the male taper portion 222.

  At the distal end side fixing position, the protrusion 231 (a part of the inner peripheral surface) of the lock adapter 23 comes into pressure contact with each rib 226, so that the lock adapter 23 is fixed to the mouth portion 22. That is, the lock adapter 23 is fixed to the mouth portion 22 by fitting at the distal end side fixing position. With such a configuration, the operation of fixing the lock adapter 23 to the mouth portion 22 can be easily and reliably performed. Moreover, by setting it as such a structure, the fixing force (fitting force) to the opening | mouth part 22 of the lock adapter 23 can be easily adjusted by setting suitably the installation number of the rib 226, a width | variety, etc., for example. There is also an advantage of being able to.

  Further, the plurality of ribs 226 are provided at substantially equal intervals along the circumferential direction of the mouth portion 22. Thereby, since the fixing | fixed to the circumferential direction of the opening | mouth part 22 of the lock adapter 23 can be performed more uniformly (uniformly), these can be fixed more stably.

  The height of the base end portion of the rib 226 gradually decreases in the base end direction. That is, the base end surface of the rib 226 forms an inclined surface. As a result, when the operation of moving the lock adapter 23 to the distal end side fixed position is performed, the protrusion 231 of the lock adapter 23 can be performed more smoothly without being caught by the edge of the rib 226.

  Further, the fixing force of the lock adapter 23 to the mouth portion 22 at the distal end side fixing position is such that the lock adapter 23 does not move by its own weight in a state where the proximal end side of the syringe 1 (mouth portion 22) is directed vertically downward, or More than that.

  In particular, the fixing force with respect to the mouth portion 22 of the lock adapter 23 at the distal end side fixing position is such that the outer cylinder main body 21 and the second female connector 10 are respectively connected in a state where the second female connector 10 is connected to the distal end portion of the syringe 1. When gripping and rotating the outer cylinder main body 21 relative to the second female connector 10, it is preferable that the force is such that the lock adapter 23 rotates following the outer cylinder main body 21 or more. . Thereby, operation which cancels | releases the connection of the front-end | tip part of the syringe 1 and the 2nd female connector 10 can be performed more easily.

  When the lock adapter 23 is in the distal end side fixed position, the protruding length (length B in FIG. 4) of the male taper portion 222 from the distal end of the lock adapter 23 is preferably 2.1 mm or more. More preferably, it is about 3 mm. By setting the protruding length within the above range, the second female connector 10 can be more reliably connected to the tip of the syringe 1.

  Such a syringe 1 includes a movement restricting means 5 for restricting the lock adapter 23 from moving from the retracted position to the proximal end side, and a removal preventing means 6 for preventing the lock adapter 23 from being detached from the mouth portion 22. Have. Hereinafter, each of the movement restricting means 5 and the separation preventing means 6 will be described.

The mouth portion 22 has a diameter-enlarged portion 224a whose outer diameter is enlarged at the base end portion, and the outer peripheral surface of the diameter-enlarged portion 224a is continuous with the rib 223 and has a height substantially equal to the rib 223. A rib 224b having a thickness is formed. Since the outer diameter of the enlarged diameter portion 224a is larger than the outer diameter of the mouth portion 22, a step portion 225 is formed at the boundary portion between the rib 223 and the rib 224b. For this reason, when the lock adapter 23 is moved from the retracted position to the base end side, the base end of the lock adapter 223 comes into contact with the stepped portion 225 and further moves to the base end side (the outer cylinder main body 21 side). Is regulated (blocked).
That is, in this embodiment, the movement restricting means 5 is configured by the stepped portion 225.

  Further, a stepped portion 227 is formed on the proximal end side of the male tapered portion 222 of the mouth portion 22 (in the present embodiment, in the vicinity of the distal end of the rib 226). For this reason, when the lock adapter 23 is moved to the distal end side of the syringe 1 (the distal end side from the distal end side fixed position), the distal end of the protrusion 231 of the lock adapter 223 comes into contact with the stepped portion 227, and further to the distal end side. Movement is restricted (blocked). This prevents the lock adapter 23 from being detached from the mouth portion 22.

  That is, in this embodiment, the separation preventing means 6 is configured by the stepped portion 227 and the protrusion 231 of the lock adapter 23. By providing such a detachment preventing means 6, the second female connector 10 is detached from the mouth portion 22 together with the lock adapter 23 from the state in which the second female connector 10 is connected to the distal end portion of the syringe 1. Can be prevented.

  As described above, the lock adapter 23 is relatively moved along the axial direction of the mouth portion 22 between the position where the base end of the lock adapter 23 abuts on the stepped portion 225 and the position where the distal end of the protrusion 231 contacts the stepped portion 227. It is possible to move.

  Although this movement distance is not specifically limited, It is preferable that it is 5.4 mm or more, and it is more preferable that it is about 5.4-6.9 mm. If the movement distance is too short, depending on the length (full length) of the lock adapter 23, the male taper portion 222 may not be sufficiently exposed from the lock adapter 23 when the lock adapter 23 is in the retracted position. If the protruding length is made longer than the upper limit, the entire length of the syringe 1 becomes undesirably too large.

Next, an example of the usage method of the syringe 1 in this embodiment is demonstrated.
[1] When connecting the first female connector 9 First, the lock adapter 23 is grasped with one hand, the outer cylinder body 21 is grasped with the other hand, and the outer cylinder body 21 is fixed in a locked state. The adapter 23 is moved toward the outer cylinder main body 21. As a result, the lock adapter 23 moves to the retracted position.

  In the retracted position, the protrusion 231 of the lock adapter 23 is pressed against each rib 223 and the lock adapter 23 is fixed to the mouth portion 22 by fitting.

  Next, in this state, the first female connector 9 is held with one hand, and the male taper portion 222 of the syringe 1 is inserted and fitted into the lumen portion 91. Thereby, the 1st female connector 9 can be connected to the front-end | tip part of the syringe 1. FIG.

  At this time, since the lock adapter 23 is in the retracted position, the operation of fitting the male taper portion 222 to the inner cavity portion 91 of the first female connector 9 can be reliably performed without obstruction.

[2] When connecting the second female connector 10 First, the lock adapter 23 is moved to the distal end side of the syringe 1, the protrusion 231 is pressed against each rib 226, and the lock adapter 23 is fitted and fixed to the mouth portion 22. To do.

  Next, while holding the lock adapter 23 with one hand and the second female connector 10 with the other hand, the male taper portion 222 of the syringe 1 is inserted into the lumen 102 of the second female connector 10 while locking. The adapter 23 is rotated. At this time, since the lock adapter 23 is fitted and fixed to the mouth portion 22, when the lock adapter 23 is rotated, the entire syringe 1 rotates. As a result, the male taper portion 222 is fitted into the inner cavity portion 102 of the second female connector 10, and the screw thread 232 of the lock adapter 23 is screwed into the screw groove 101 of the second female connector 10, whereby the second The female connector 10 can be connected to the tip of the syringe 1.

<Second Embodiment>
FIG. 5 is a semi-longitudinal sectional view of a second embodiment of the syringe of the present invention, FIGS. 6 to 8 are partial longitudinal sectional views of the distal end portion of the syringe shown in FIG. 5, and FIG. It is AA sectional view.

  Hereinafter, the second embodiment of the syringe of the present invention will be described with reference to these drawings. However, the difference from the above-described first embodiment will be mainly described, and the description of the same matters will be omitted.

  The present embodiment is the same as the first embodiment except that the configuration of the mouth portion of the outer cylinder and the lock adapter is different and that the lock adapter is not fixed to the mouth portion at the retracted position.

  As shown in FIGS. 5 and 6, the mouth portion 22A of the outer cylinder 2 has a plurality of (four in this embodiment) ribs 228a and protrusions 229a on the outer peripheral surface thereof.

  The rib 228a is formed so as to protrude outward from the stepped portion 225 to the stepped portion 227 along the axial direction of the mouth portion 22A.

  The protrusion 229a is formed to protrude outward on the tip side of a groove 228b formed between two adjacent ribs 228a.

  As shown in FIGS. 5 and 6, the lock adapter 23 </ b> A has a plurality of (four in this embodiment) claws 234.

  The claw 234 is formed on the inner peripheral surface of the base end portion of the lock adapter 23A so as to protrude toward the central axis of the lock adapter 23A.

  As shown in FIG. 9, the lock adapter 23A is provided in the mouth portion 22A so that the claws 234 are between the adjacent ribs 228a, that is, the claws 234 are accommodated in the grooves 228b.

  Thereby, each rib 228a contacts the claw 234 adjacent to the rib 228a, and the rotation of the lock adapter 23A around the mouth portion 22A is restricted. Therefore, the lock adapter 23 </ b> A is provided so as to be movable along the axial direction of the mouth portion 22 </ b> A without rotating around the mouth portion 22 </ b> A within a range in which the lock adapter 23 </ b> A can move.

  Such a configuration contributes to simplification of the structure of the outer cylinder 2 (mouth portion 22A) and easy operation of the lock adapter 23A.

  As shown in FIG. 9, the four ribs 228a (same for the claws 234) are provided at substantially equal intervals along the circumferential direction of the mouth portion 22, so that the lock adapter 23A can be stably regulated. In addition, the lock adapter 23A can be easily slid (moved).

  Further, the syringe 1 has a distal end side fixed position (see FIG. 8) where the lock adapter 23A is fixed to the mouth portion 22A when the lock adapter 23A is on the distal end side of the mouth portion 22A.

  As shown in FIG. 6, the height of the protrusion 229a gradually decreases in the distal direction and the proximal direction. That is, the front end surface and the base end surface of the protrusion 229a each constitute an inclined surface.

  Thus, when the lock adapter 23A moves from the proximal end side of the mouth portion 22A to the distal end side fixed position or moves from the distal end side fixed position to the proximal end side of the mouth portion 22A, the claw 234 of the lock adapter 23A is The operation can be performed more smoothly without being caught by the edge of the protrusion 229a.

  As shown in FIG. 8, the lock adapter 23 </ b> A is fixed to the mouth portion 22 </ b> A when the claw 234 is housed in the fixed position space 229 b formed between the step portion 227 and the protrusion 229 a at the distal end side fixed position. Is done. That is, the lock adapter 23A is fixed to the mouth portion 22A by restricting the movement of the mouth portion 22A of the claw 234 in the axial direction by the step portion 227 and the protrusion 229a at the distal end side fixed position. Further, as described above, the lock adapter 23A is restricted from rotating about the mouth portion 22A by the ribs 228a coming into contact with the claws 234 adjacent thereto.

  With such a configuration, the operation of fixing the lock adapter 23A to the mouth portion 22A can be easily and reliably performed.

  The numbers of ribs 228a (grooves 228b), protrusions 229a, and claws 234 are not limited to four, and may be two, three, or five or more, for example.

  In addition, the height of the protrusion 229a and the height of the claw 234 are preferably equal to or slightly lower than the height of the rib 228a (depth of the groove 228b).

  The width of the claw 234 is preferably about the same as or slightly smaller than the width of the groove 228b.

  Next, although an example of the usage method of the syringe 1 in this embodiment is demonstrated, it demonstrates centering on an example of the difference in an example of the usage method of the syringe 1 in 1st Embodiment like the above-mentioned, and the same matter demonstrates the description. Omitted.

[1] When connecting the first female connector 9 As in the first embodiment, when the lock adapter 23A is moved to the retracted position, the lock adapter 23A is held while holding the outer cylinder body 21 with the other hand. Fix with the same hand (see FIG. 7).
Henceforth, it is the same as that of 1st Embodiment.

[2] When connecting the second female connector 10 First, the lock adapter 23A is moved to the distal end side fixed position, and the lock adapter 23A is fixed to the mouth portion 22A.

Next, while holding the syringe 1 with one hand and the second female connector 10 with the other hand, and inserting the male taper portion 222 of the syringe 1 into the lumen 102 of the second female connector 10, the syringe 1 Is rotated (see FIG. 8). At this time, since the lock adapter 23A is integrally fixed to the mouth portion 22A, when the rotation operation of the syringe 1 is performed, the lock adapter 23A rotates accordingly.
Henceforth, it is the same as that of 1st Embodiment.

  Although the illustrated embodiment of the syringe of the present invention has been described above, the present invention is not limited to this. For example, the configuration of each part of the syringe is arbitrary so that the same function can be exhibited. be able to.

  Further, for example, the tip side fixing position may be provided if necessary, and may be omitted.

  In the second embodiment as well, similarly to the first embodiment, the lock adapter may be configured to be fixed to the mouth portion at the retracted position.

  The syringe of the present invention can be applied to general-purpose syringes used for drug administration to patients, administration of drug solutions from infusion lines and dialysis circuits, mixing of drug solutions, etc. It can also be applied to (stored) prefilled syringes.

  In the case of a prefilled syringe, a chemical solution is accommodated in the outer cylinder as necessary. The type of drug in this drug solution is not particularly limited. For example, sedatives such as diazepam and midazolam, intravenous anesthetics such as prophopol, anesthetic analgesics such as fentanyl citrate and morphine hydrochloride, mepivacaine hydrochloride, hydrochloric acid Local anesthetics such as lidocaine, non-depolarizing muscle relaxants such as squismethonium chloride and pancuronium bromide, catecholamines such as epinephrine, dobamine hydrochloride, dobutamine hydrochloride, vasopressors such as ephedrine hydrochloride, nicardipine hydrochloride, chlorpromazine hydrochloride, propranolol hydrochloride Antihypertensives such as isosorbide nitrate, nitroglycerin, diuretics such as furosemide and aminophylline, antiarrhythmic drugs such as atropine sulfate, prostaglandin E1 preparations, bronchodilators such as aminophylline and ephedrine hydrochloride, famotidine Peptic ulcer agents such as Nandrolone canate, dexamethasone sodium phosphate, betamethasone, hormones such as human insulin, hemostatic agents such as traquinesamic acid, blood coagulants such as heparin sodium, anti-shock agents such as urinastatin, anti-parkinsonian such as biperiden lactate, levodopa, Vitamin preparation, correction electrolyte solution, G-CSF preparation, liver disease preparation, human erythropoietin preparation such as epoetin alfa, osteoporosis treatment agent such as elcatonin, synthetic salmon calcitonin preparation, polyvalent / enzyme inhibitor, paclitaxel, carboplatin, cisplatin Any of anti-malignant tumor drugs such as etoposide, antiallergic drugs such as d-chlorpheniramine maleate, antibiotic preparations, antituberculosis drugs, chemotherapeutic agents, hepatitis B vaccine and the like may be used.

It is a half longitudinal cross-sectional view of 1st Embodiment of the syringe of this invention. It is a fragmentary longitudinal cross-sectional view (The state in which a lock adapter exists in a rotatable position) of the front-end | tip part of the syringe shown in FIG. FIG. 2 is a partial vertical cross-sectional view of the tip of the syringe shown in FIG. 1 (showing a state where the lock adapter is in the retracted position and the first female connector is connected). It is a fragmentary longitudinal cross-sectional view of the front-end | tip part of the syringe shown in FIG. 1 (The lock adapter is in a front end side fixed position, and shows the state which connected the 2nd female connector). It is a half longitudinal cross-sectional view of 2nd Embodiment of the syringe of this invention. It is a fragmentary longitudinal cross-sectional view (The state in which a lock adapter exists in a rotatable position) of the front-end | tip part of the syringe shown in FIG. FIG. 2 is a partial vertical cross-sectional view of the tip of the syringe shown in FIG. 1 (showing a state where the lock adapter is in the retracted position and the first female connector is connected). It is a fragmentary longitudinal cross-sectional view of the front-end | tip part of the syringe shown in FIG. 1 (The lock adapter is in a front end side fixed position, and shows the state which connected the 2nd female connector). It is the sectional view on the AA line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Syringe 2 Outer cylinder 20 Inner peripheral surface 21 Outer cylinder main body 22, 22A Mouth part 221 Flow path 222 Male taper part 223 Rib 224a Expanded part 224b Rib 225 Step part 226 Rib 227 Step part 228a Rib 228b Groove 229a Protrusion part 229b Fixed position Space 23, 23A Lock adapter 231 Protruding portion 232 Thread 233 Rib 234 Claw 24 Space 25 Flange 26 Scale 3 Gasket 31, 32 Protruding portion 4 Pusher 40 Main body portion 41 Plate member 42 Finger rest portion 5 Movement restricting means 6 Detaching preventing means 9 First female connector 91 Lumen 10 Second female connector 101 Screw groove 102 Lumen

Claims (10)

A syringe that can be selectively connected to a first female connector at a distal end and a second female connector having a female-side threaded portion on an outer peripheral surface,
An outer cylinder main body having a bottomed cylindrical shape, and a mouth part integrally formed at a distal end portion of the outer cylinder main body, the inner cavity of the first female connector and the second female connector A syringe outer cylinder having a male taper portion that fits into the lumen portion, and having a mouth portion formed with a flow path through which liquid can pass ;
A lock adapter provided on the outer peripheral portion of the mouth portion so as to be relatively movable along the axial direction of the mouth portion, and having a male side screwing portion screwed into the female side screwing portion on the inner peripheral surface; Have
The lock adapter includes a distal end side of the mouth portion in which the male taper portion fits into a lumen portion of the second female connector, and the male screw portion is screwed into the female screw portion. when the distal end side fixing location which is fixed, perform an operation of fitting the Osutepa portion to the lumen of the first female connector by pressing or engagement with respect to the mouth portion when in the syringe, characterized in that from the front end side fixing position in which retracted to the retracted position of the base end side. The mouth portion has a plurality of ribs formed on the outer peripheral surface of the portion on the base end side of the male taper portion and extending along the axial direction.
The lock adapter has a ring-shaped protrusion along the circumferential direction, formed on the inner peripheral surface of the portion on the proximal end side of the male side screwing portion, and has a distal end side fixed position and the The syringe according to claim 1, wherein the protrusion is fixed in pressure contact with each rib at each of the retracted positions. The mouth portion is formed at the proximal end side of the male taper portion so as to protrude from the outer peripheral surface thereof, and extends along the axial direction, and the distal end portion between the adjacent ribs. It has a stopper part composed of a protruding part formed on the
The lock adapter has a claw that is formed on the inner peripheral surface of the portion on the proximal end side of the male side screwing portion and is inserted between the ribs. The syringe according to claim 1, wherein the nail is fixed by engaging the stopper portion. Each of the ribs has a deficient part that is missing in the middle,
Between the retracted position and the distal-end-side fixed position, there is a rotatable position where the lock adapter can rotate relative to the mouth ,
The lock adapter has a ring-shaped protrusion along the circumferential direction, formed on the inner peripheral surface of the lock adapter at a position proximal to the male-side threaded portion, and the protrusion is rotatable. The syringe according to claim 2 or 3 , wherein the syringe is rotatable at a position facing the defect portion . The syringe according to any one of claims 1 to 4 , wherein when the lock adapter is in the retracted position, the male taper portion protrudes from the tip of the lock adapter by 7.5 mm or more. The syringe according to any one of claims 1 to 5 , wherein when the lock adapter is in the distal end side fixed position, the male taper portion protrudes 2.1 mm or more from the distal end of the lock adapter.   The syringe according to any one of claims 1 to 6, wherein the lock adapter is relatively movable by 5.4 mm or more along the axial direction of the mouth portion.   The syringe according to any one of claims 1 to 7, wherein an inner diameter (average) of the mouth portion is 1.2 mm or more.   The syringe according to any one of claims 1 to 8, wherein the mouth has a length of 16 to 20 mm. Having a gasket capable of sliding in the syringe outer cylinder;
When the gasket is positioned on the tip of the syringe outer tube, the volume of the space defined between the gasket and the syringe barrel is according to any one of claims 1 or less 0.1 mL 9 Syringe.

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