JP5565840B2 - Syringe container - Google Patents

Description

  The present invention relates to a syringe container. The syringe container referred to in the present application includes a container and a syringe, as well as an embodiment in which an injection needle is removed.

  A container / syringe into which a predetermined amount of medicine has been injected has been proposed (Patent Document 1). The basic structure is that the piston at the tip of the operating rod is fitted in the cartridge cylinder of the upper end opening, set in a fixed position, filled with a medicine from the opening, and closed with a lid member including an injection needle. is there.

  However, if the piston is unexpectedly displaced from the fixed position before closing, the quantitative property of the medicine cannot be guaranteed. Therefore, in Patent Document 1, the operation rod is formed into a cross-shaped cross section including four vertical ribs, and one rib is cut at an intermediate portion in the vertical direction so that a rib portion having a certain length below the cut portion is formed. A flexible piece bent obliquely upward and outward is used as a stopper. This flexible piece is locked to the lower surface of the cartridge cylinder, and can be released by pushing inward against its elasticity.

Japanese Patent No. 3558723

  The container and syringe of Patent Document 1 has the following problems.

  First, a part of the rib included in the cross-shaped operation rod is cut and bent obliquely to make a flexible piece. If the degree of bending is too large due to molding error, etc., the stopper piece is pushed in. Hateful. Also, if the degree of bending is too small, the tip of the flexible piece may not be sufficiently engaged with the lower end of the cartridge cylinder, and the locked state may be unexpectedly released due to other things hitting the stopper piece. is there.

  Second, the flexible piece is pushed inward against the elasticity with a finger, and the flexible piece is held down with the finger until the operation rod portion provided with the flexible piece enters the cartridge cylinder. There is a need.

  A first object of the present invention is to provide a stopper mechanism in which a connecting piece is interposed between the tip of a stopper piece projecting obliquely from the operating rod of the plunger and the operating rod so that the stopper function is not released unexpectedly. Is to provide a syringe container.

  The second object of the present invention is to provide a syringe container that is easy to use because the stopper piece and the connecting piece are elastically inverted inward so that the inward pushing state of both pieces is maintained.

The first means comprises a cartridge cylinder 2 having a spout 6 on the distal end side and a grip 10 on the proximal end side;
A closing member 14 for closing the spout 6;
It has a piston 22 that is slidably and liquid-tightly fitted into the cartridge cylinder 2, and includes a plunger 20 that extends an operation rod 24 outward from the piston.
A stopper piece 38 protrudes from a part of the operation rod to the front in the longitudinal direction intermediate portion of the operation rod 24 obliquely forward with respect to the central axis O of the operation rod. In the syringe container provided with the stopper mechanism 30 that can be locked to the proximal end,
The stopper mechanism is further provided in such a manner that the stopper piece 38 can be pushed inward by connecting both ends of the connecting piece 42 to the tip of the stopper piece and the operation rod portion near the tip so as to be able to bend. The stopper piece 38 can be inserted into the cartridge cylinder together with the operation rod portion near the stopper piece .
The operation rod 24 includes a first strip 26 and a second strip 28 that cross each other in a cross-shaped cross section,
The stopper mechanism 30 includes a notch 32 formed in at least one middle portion of the two plate portions of the second band plate 28 divided by the first band plate 26 in the longitudinal direction, and the notch 32 A reinforcing plate 34 parallel to a first strip attached to one plate portion on the base end side, a stopper piece 38 at the end of the reinforcing plate 34, and a connecting piece 42 at the tip side of the notch 32. These stopper pieces and connecting pieces are connected via a hinge so that they can be elastically inverted inward.

  In this structure, as shown in FIG. 11 or FIG. 1, the stopper piece 38 protruding obliquely from the operation rod 24 can be locked to the base end of the cartridge cylinder. It has been proposed to provide a connecting piece 42 between a nearby operating rod portion. If such a connecting piece is not provided, for example, when the leading end surface of the stopper piece is engaged with the base end of the cartridge halfway due to a molding error, and other objects hit the outer surface of the stopper piece or the base end of the operation rod. There is a possibility that the locked state is unexpectedly released. The number and arrangement of the stopper pieces will be described later.

  In the present specification, “tip” and “tip” refer to the side close to the tip of the syringe (upper side in FIG. 1) unless otherwise described, and “proximal” and “base” are the opposite. Say the side. The “connecting piece” prevents the stopper piece from being inadvertently displaced inward. The “occluding member” includes both the lid 14A shown in FIG. 1 and the cap 14B with an injection needle shown in FIG. 6, and the outer cap of the injection needle may be a double cap that surrounds the overcap.

Further, the present means is such that the operating rod 24 has a cross-shaped cross section in which the first strip 26 and the second strip 28 intersect as shown in FIG. 3, and one of the second strips as shown in FIG. It is proposed that a notch 32 is provided in the portion, a stopper piece 38 is connected to the base end side of the notch, and a connecting piece 42 is connected to the tip end side of the notch. In order to improve the locking force of the stopper piece 38 against the pushing of the plunger forward, a reinforcing plate is attached to one plate portion of the second belt plate, and the stopper piece is connected via the reinforcing plate.

The second means includes the first means, and the operation rod 24 has the stopper mechanisms 30 formed at a plurality of positions in the longitudinal direction of the second strip 28.

  This means is provided with at least two stopper mechanisms 30 including a stopper piece, a connecting piece, a notch and a reinforcing plate in the longitudinal direction of the operation rod as shown in FIG. This is because after the first stopper piece is pushed in to inject the medicine, the second and subsequent stopper pieces are pushed in further so that an additional medicine can be injected. The operation of this means requires the configuration of the above means in which the stopper piece and the connecting piece are elastically inverted inward and the pushed state is maintained.

The third means includes the first means or the second means, and the grip 10 is formed in an outward flange shape on the proximal end side of the cartridge cylinder, and the flange hole is formed in the plunger insertion port 12. And
A stopper mechanism having a structure symmetrical to the stopper mechanism 30 provided on one plate portion is formed on the other plate portion of the second belt plate 28 with the central axis O as a symmetry axis.
The two connecting pieces 42 of these stopper mechanisms are configured so as to be able to contact the edge of the plunger insertion port 12 respectively.

  As shown in FIG. 1, this means is provided with a pair of left and right stopper mechanisms 38 so that the two connecting pieces 42 come into contact with both sides of the hole edge of the plunger insertion port 12. As a result, rattling of the plunger can be prevented.

According to the first aspect of the invention, since the connecting piece 42 is provided between the tip of the stopper piece 38 projecting from the operation rod 24 and the operation rod, the stopper function can be ensured.
According to the invention according to the first means, on both sides of the notch 32 which is formed in the second strip having the operating rod, since the stopper piece and the connecting piece elastically inverted linked, the stopper function is further enhanced To do.
According to the invention relating to the second means, since the stopper piece 38 and the connecting piece 42 are provided at a plurality of locations in the longitudinal direction of the operating rod, the plunger can be locked at two positions.
According to the invention relating to the third means, since the two connecting pieces 42 can contact the hole edge of the plunger insertion port, the rattling of the plunger with respect to the cartridge cylinder 2 can be eliminated.

It is a front view of the syringe container which concerns on 1st Embodiment of this invention. It is a side view of the syringe container of FIG. It is a cross-sectional view of the syringe container of FIG. 1 in the III-III direction. It is a cross-sectional view of the IV-IV direction of the syringe container of FIG. It is a cross-sectional view of the VV direction of the syringe container of FIG. It is a front view which shows the latching state of the syringe container of FIG. It is explanatory drawing of the operation | movement which cancels | releases the latching state of FIG. It is explanatory drawing which shows the operation | work which pushes in a plunger after the latch release operation | movement of FIG. It is a cross-sectional view of the IX-IX direction of FIG. It is action | operation explanatory drawing of the principal part of the syringe container of FIG. It is a front view of the syringe container which concerns on 2nd Embodiment of this invention. It is a front view of the syringe container which concerns on 3rd Embodiment of this invention.

  1 to 10 show a syringe container according to the first embodiment of the present invention. This container and syringe can be formed by the cartridge cylinder 2, the closing member 14 and the plunger 22. Each of these members can be formed of a synthetic resin unless otherwise specified.

  The cartridge cylinder 2 is composed of a cartridge cylinder body 4 and a grip 10. The cartridge cylinder 2 is a straight cylinder having a small diameter spout 6 at the upper end (tip). A finger grip 10 protrudes outwardly from the lower end of the cartridge cylinder, and the flange hole serves as a plunger insertion opening 12.

  In the illustrated example, the cartridge cylinder main body 4 and the grip 10 are separated. Specifically, a collar portion 8 is attached to the lower end of the cartridge cylinder body 4 and a clip 10 is attached to the collar portion. In the illustrated clip 10, the upper ring plate 10 b is folded upward and inward from the outer edge of the lower ring plate 10 a having the plunger insertion opening 12, and the flange portion 8 is sandwiched between these upper and lower ring plates. The lower surface of the lower ring plate is formed to be horizontal and flat. The cartridge cylinder body 4 can be formed of glass in addition to the synthetic resin.

  The closing member 14 liquid-tightly and detachably closes the spout 6. In the present embodiment, in the initial state of the container / syringe, the top-cylindrical lid 14A shown in FIG. 1 is fitted as a closing member. When injecting a medicine, a cap 14B with an injection needle as shown in FIG. 6 is fitted in a liquid-tight manner instead of the lid.

  The plunger 20 has a piston 22 attached to the tip of the operation rod 24 and is slidably and liquid-tightly fitted into the cartridge cylinder 2.

  The operation rod 24 is formed in a cross-shaped cross section by joining the first strip plate 26 and the second strip plate 28 so as to cross each other at the central axis O. The reason for such a configuration is to save material and can be changed as appropriate. A disc-shaped handle 48 is attached to the lower end of the operation rod 24.

  A pair of left and right stopper mechanisms 30 that are axisymmetric with respect to the central axis O are formed on one plate portion 28a and the other plate portion 28b of the second strip 28 divided by the first strip 26, respectively.

  The stopper mechanism 30 includes a notch 32, a reinforcing plate 34, a stopper piece 38, and a connecting piece 42.

The notch 32 is formed by removing the longitudinal intermediate portion of the one plate portion 28a and the other plate portion 28b of the second strip . The reason why the notch 32 is provided is to secure a pushing margin when the stopper piece and the connecting piece are pushed inward.

  The reinforcing plate 34 is attached to the outer ends of one plate portion and the other plate portion connected to the lower end side of the notch 32, and the upper end of the reinforcing plate 34 is connected to the stopper piece 38 via the first hinge 36. ing. Thereby, as shown in FIG. 2, the front-rear width of the first hinge 36 can be lengthened, and the strength of the hinge can be improved. In the illustrated example, each reinforcing plate 34 and the second strip 28 are formed in a T-shape when viewed from above as shown in FIG.

  The stopper piece 38 is inclined upward and outward from the upper end of the reinforcing plate 34 through the first hinge 36 at a small inclination angle θ with respect to the vertical plane. This is to facilitate elastic reversal of a stopper piece and a connecting piece, which will be described later. The distal end surface (upper end surface) 40 of the stopper piece 38 is desirably formed horizontally as a contact surface with the base end surface of the cartridge cylinder (the lower surface of the lower ring plate in the illustrated example). The stopper piece 38 in the illustrated example is a vertically long rectangle as shown in FIG. 2, but its structure can be changed as appropriate.

  As shown in FIG. 5, the lower end portion of the connecting piece 42 is connected to the inner edge side of the distal end surface 40 of the stopper piece 38 via the second hinge 44, and the upper end portion of the connecting piece 42 is notched 32. Is connected to a second strip portion on the upper end side of the first through a third hinge 46. In the illustrated example, the third hinge 46 has a width that is about the thickness of the second strip 28, but if necessary, the thickness of the second strip that is connected to the third hinge is increased, and the connection width with the third hinge is increased. It may be lengthened to improve the strength of the hinge.

The first hinge 36, the second hinge 44, and the third hinge 46 are arranged in a positional relationship that allows the stopper piece 38 and the connecting piece 42 to be elastically reversed. Specifically, as shown in FIG. 10, the position of the first hinge 36 viewed from the front is point A, the position of the third hinge 46 is point C, the position of the second hinge 44 before inversion is B, and the position after inversion Assuming that the position is B ′, these points B and B ′ appear at line symmetry positions with the line segment AC as the symmetry axis. Therefore, the points A to C may be arranged so that the point B ′ is in the vicinity of the first strip 26 or on the right side thereof. In the illustrated example, the point C is positioned at the intermediate portion in the width direction of the one plate portion 28a of the second strip, but the arrangement can be changed as appropriate.

  The width of the stopper piece 38 in the front-rear direction is made shorter than the length of the chord DE when the hole edge of the plunger insertion opening is cut by a virtual line in the front-rear direction at the position B ′ after the elastic reversal shown in FIG. By doing so, the stopper piece 38 can be fitted into the cartridge cylinder after the elastic reversal.

  Next, the example of the suitable procedure of use of the syringe container of this application is demonstrated. When a drug is administered to a patient, a prescribed amount of the drug is first injected into the patient, and an additional drug may be injected as necessary. The procedure described below assumes such a case.

  FIG. 1 shows a state in which a medicine is filled in the cartridge cylinder 2. In the figure, a lid 14A closes the spout 6 in a liquid-tight manner, whereby the syringe container of the present application serves as a medicine container. The syringe container of the present application can be shipped to a medical institution or the like in a state filled with a medicine.

When injection is performed, the lid 14A is removed, and instead, for example, a cap 14B with an injection needle shown in FIG. Then, a finger is put on the grip 10, a needle is inserted into the patient's body, and the handle 48 is pushed to the cartridge cylinder 2 side. As shown in FIG. 6, when the upper end of the stopper piece 38 abuts against the proximal end surface of the cartridge cylinder, the injection of a certain amount of medicine is completed.

  In the state of FIG. 6, since the tip end surface of the stopper piece is locked to the base end surface of the cartridge cylinder 2 as shown in FIG. 9, the plunger 20 cannot be pushed further into the cartridge. The two connecting pieces 42 shown in FIG. 6 are in contact with both sides of the plunger insertion opening 12 to reduce rattling of the plunger 20.

  Even if the stopper piece 38 and the connecting piece 42 come into contact with other objects, the stopper piece 38 and the connecting piece 42 elastically return to their original positions as long as they are not pushed in until they exceed the line segment AC shown in FIG. Therefore, the inconvenience that the locked state is unexpectedly released is unlikely to occur. In this state shown in FIG. 6, it may be shipped to a medical institution as a medicine container and syringe. An overcap (not shown) may be fitted to the outside of the cap with the injection needle.

  When injecting the remaining medicine in the cartridge cylinder according to the condition of the patient, the pair of left and right stopper pieces 38 are pushed inward in the left-right direction as shown in FIG. Thereby, the stopper piece 38 and the connecting piece 42 are elastically reversed inward. At this time, the stopper piece 38 moves inward of the hole edge of the plunger insertion port 12 as indicated by an imaginary line in FIG. As a result, the engagement between the proximal end surface of the cartridge cylinder and the distal end surface 40 of the stopper piece is released, and hence the plunger 20 can enter the cartridge cylinder 2.

  Further, due to the elastic reversal of the stopper piece 38 and the connecting piece 42, the inward pushing state of both pieces is maintained. In other words, since it is not necessary to hold the stopper piece with the finger in order to maintain the unlocked state, the injection work can be easily performed.

  The above-described procedure for injecting the medicine in the cartridge cylinder in two portions is a suitable example of the usage method of the present dispenser, and the usage method is not limited to this usage method. Further, a medicine-filled container and syringe (so-called “prefilled syringe”) that is shipped in the state of being pre-filled with a medicine is a preferred embodiment of the present invention, but a syringe container in which the cartridge cylinder is empty in the state of FIG. Is included in the technical scope.

  Next, another embodiment of the present invention will be described. In these descriptions, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 11 shows a syringe container according to the second embodiment of the present invention. In this embodiment, one of the pair of left and right stopper mechanisms 30 in the first embodiment is omitted. On the opposite side of one stopper mechanism, the other plate portion 28b of the second band plate is continuous, and restricts the swinging of the plunger in the left-right direction. Therefore, a considerable locking force can be expected with only one stopper mechanism.

  FIG. 12 shows a syringe container according to the third embodiment of the present invention. In this embodiment, a plurality of stopper mechanisms 30 are formed at intervals in the longitudinal direction of the operation rod from the configuration of the second embodiment.

  Between the two stopper mechanisms 30, it is preferable to provide the one plate portion 28a of the second belt plate and the reinforcing plate 34 so as to ensure the strength of the operating rod. In the illustrated example, the stopper mechanism is provided only on one side of the second strip, but a plurality of pairs of left and right stopper mechanisms may be formed at different heights of the operating rod.

2 ... cartridge cylinder 4 ... cartridge cylinder body 6 ... spout 8 ... collar
10 ... Grip 10a ... Lower ring plate 10b ... Upper ring plate 12 ... Plunger insertion slot
14 ... Closure member 14A ... Lid 14B ... Cap with injection needle
20 ... plunger 22 ... piston 24 ... operating rod 26 ... first strip 28 ... second strip
28a ... One plate part 28b ... The other plate part
30 ... Stopper mechanism 32 ... Notch 34 ... Reinforcement plate 36 ... First hinge
38 ... Stopper piece 40 ... End face 42 ... Connecting piece 44 ... Second hinge 46 ... Third hinge
48 ... Handle A ... First hinge position B ... Second hinge position (before inversion) B '... Second hinge position (after inversion)
C ... Third hinge position DE ... String O ... Center axis θ ... Inclination angle

Claims (3)

A cartridge cylinder (2) having a spout (6) at the distal end and a grip (10) at the proximal end;
A closing member (14) for closing the spout (6);
A plunger (20) having a piston (22) slidably and liquid-tightly fitted into the cartridge cylinder (2), and an operating rod (24) extending outward from the piston; Consists of
A stopper piece (38) protrudes obliquely forward from the central axis (O) of the operation rod from a part of the operation rod to the middle in the longitudinal direction of the operation rod (24). In a syringe container provided with a stopper mechanism (30) capable of locking (40) to the proximal end of the cartridge cylinder (2),
The stopper mechanism is further provided so that the stopper piece (38) can be pushed inward by connecting both ends of the connecting piece (42) to the tip portion of the stopper piece and an operation rod portion near the tip portion so as to bend, And in that pushed state, the stopper piece (38) can be inserted into the cartridge cylinder together with the operation rod part near the stopper piece .
The operation rod (24) includes a first strip (26) and a second strip (28) that cross each other in a cross-shaped cross section,
The stopper mechanism (30) has a notch formed in the longitudinal intermediate portion of at least one plate portion (28a) of the two strip portions of the second strip plate (28) divided by the first strip plate (26). (32) and a reinforcing plate (34) parallel to the first strip attached to one plate portion on the base end side of the notch (32), and a stopper at the end of the reinforcing plate (34) A piece (38) and a connecting piece (42) are connected to the front end side of the notch (32) via a hinge so that the stopper piece and the connecting piece can be elastically inverted inward. A syringe container characterized by that. The operating rod (24) in the longitudinal direction, characterized in that the formation of the stopper mechanism (30) at a plurality of positions, the syringe vessel of claim 1, wherein the second strip (28). The grip (10) is formed in an outward flange shape on the proximal end side of the cartridge cylinder, and the flange hole serves as a plunger insertion port (12).
A stopper mechanism having a symmetric structure with the stopper mechanism (30) provided on one plate portion is formed on the other plate portion of the second belt plate (28) with the central axis (O) as a symmetry axis,
Two connecting pieces of the stopper mechanism (42) and wherein the contact can be be configured to the hole edge of each said plunger insertion opening (12), the syringe container according to claim 1 or claim 2.