WO2011129175A1 - Syringe holding structure - Google Patents

Syringe holding structure Download PDF

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Publication number
WO2011129175A1
WO2011129175A1 PCT/JP2011/056385 JP2011056385W WO2011129175A1 WO 2011129175 A1 WO2011129175 A1 WO 2011129175A1 JP 2011056385 W JP2011056385 W JP 2011056385W WO 2011129175 A1 WO2011129175 A1 WO 2011129175A1
Authority
WO
WIPO (PCT)
Prior art keywords
flange
adapter
syringe
portion
cylinder
Prior art date
Application number
PCT/JP2011/056385
Other languages
French (fr)
Japanese (ja)
Inventor
根本 茂
Original Assignee
株式会社根本杏林堂
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2010-094957 priority Critical
Priority to JP2010094957 priority
Application filed by 株式会社根本杏林堂 filed Critical 株式会社根本杏林堂
Publication of WO2011129175A1 publication Critical patent/WO2011129175A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • A61M5/145Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/14546Front-loading type injectors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • A61M5/145Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/1456Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • A61M5/145Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A61M5/1458Means for capture of the plunger flange

Abstract

A syringe holding structure to which various types of syringes can be easily mounted and which can reliably hold the mounted syringe so that the syringe does not come off. A syringe holding structure (1) is provided with a main adaptor (701) and a sub-adaptor (300) which is detachably mounted to a part of the main adaptor (701). The sub-adaptor (300) is provided with a flange receiver which receives a cylinder flange (211), a flange lock mechanism which locks the cylinder flange when a syringe (200) is rotated 90 degrees about the axis thereof with the cylinder flange received in the flange receiver; and an adaptor affixation mechanism which locks the sub-adaptor to the main adaptor. The sub-adaptor (300) is also provided with an unlocking prohibition mechanism which prohibits the locking effected by the adaptor affixation mechanism from being unlocked while the cylinder flange (211) is locked by the flange lock mechanism.

Description

Syringe holding structure

The present invention relates to a syringe holding structure, in particular, can be easily mounted various types of syringes, moreover it relates syringe holding structure can be reliably held as not to come off the loaded syringe.

Currently, the diagnostic imaging apparatus for medical use, CT (Computed
Tomography) scanner, MRI (Magnetic Resonance Imaging) apparatus, PET (Positron Emission Tomography) apparatus, angiography apparatus and the like are known. When using such an image pickup apparatus, such as a contrast medium or physiological saline to the subject (hereinafter, simply referred to as "chemical") may be injected. Conventionally, various injectors for automatically performing the injection (injection head) has been proposed.

In the liquid injection using such injection head, it is important to securely hold the syringe to the injection head in order to reliably and safely inject the liquid.

Patent Document 1, a cylinder flange provided integrally with the cylinder member of the syringe, a pair of holding members for holding the right and left sides of the syringe is provided, this retaining member is a closed position for holding the syringe (the locked position) , it provided the structure to take either position and an open position to allow insertion of a syringe is disclosed.

Further, the syringe there are several types of different diameters, in order to be able to mount different syringes of such diameter, the adapter is used which corresponds to the diameter of the syringe.

Patent 2004-154238

Incidentally, the conventional syringe holding structure described above has the advantage of detaching operation of the syringe is extremely easy. On the other hand, since the movement of the holding member from the closed position to the open position simply by operating the just pulling the syringe upwards, the syringe is considered possible that deviated unintentionally. Such a problem is a problem that can occur similarly even when the provisionally applying such holding structure to a syringe adapter.

Further, in the holding structure by the pair of holding members as described above, it is necessary to set the syringe by moving the pair of holding members manually locked position. However, improvement in the workability and, from the viewpoint of reducing the human error when setting the syringe, it is desirable to be able to set the syringe more easily.

The present invention was made in view of the above problems, it is possible to easily mount the various types of syringes, yet be securely held so as not to deviate the loaded syringe It is to provide a syringe holding structure as possible.

To achieve the above object, a syringe holding structure of the present invention,
A main adapter to be mounted on injection head holding a syringe having a cylinder member and a piston member,
A sub adapters said is detachably mounted to a portion of the main adapter, holding the cylinder flange formed on the cylinder member,
A syringe holding structure comprising,
The sub-adapter,
A flange receiving for receiving said cylinder flange,
By the syringe is rotated a predetermined angle about its axis in a state in which the cylinder flange is received in receiving the flange, the flange lock mechanism for locking the cylinder flange,
An adapter locking mechanism for locking the sub-adapter to the main adapter,
In a state in which the cylinder flange is locked by the flange lock mechanism, and release prohibition mechanism for prohibiting the locking by the adapter fixing mechanism is released,
It is equipped with a.

According to such a configuration, it is possible to cope with various types of syringes only replacing the sub-adapter. Moreover, in mounting the syringe mounting operation it is only turned a predetermined angle syringe about its axis is also very simple. Also, by the function of the provided the release prohibition mechanism in sub-adapter, the lock is not released by the adapter fixing mechanism while the syringe is mounted (i.e., sub-adapter out not from the main adapter) so adapted, it is possible to prevent that unintentionally syringe comes off.

The present invention may also be a following configuration.
Wherein the main adapter, the adapter receiving portion into which the sub-adapter is mounted are formed,
Said adapter fixed structure,
A locking pawl provided on one side or the adapter receiving portion of said sub-adapters,
A locking portion for the locking pawl provided on the other side or the adapter receiving portion of said sub-adapter are engaged,
Syringe holding structure with.

The flange received is,
Approximately equal arcuate portion radius of curvature of the outer peripheral surface of the radius of curvature of the inner peripheral surface of said cylinder flange,
An elastic displaceable manner (i.e., the movable) provided arm portion with respect to the arcuate portion extending from both ends of the arc-shaped portion,
Anda knob portion formed on the arm portion,
The portion of the inner peripheral surface of the knob portion is formed on the extension of the arc shape of the inner peripheral surface of the arcuate portion, the syringe holding structure.

Liquid injector of the present invention comprises a syringe holding structure described above, the injection head to which it is attached, a.

As described above, according to the present invention, to provide a syringe holding structure can be easily mounted various types of syringes, yet can be reliably held as not to come off the loaded syringe can.

It is a perspective view of a liquid injector of an embodiment of the present invention. It is a perspective view showing a state where the main adapter is attached to the injection head of Fig. It is a perspective view showing a state in which the syringe is mounted on the main adapter. Sub adapter is a perspective view from the front side. It shows a contour shape of the cylinder flange. It is a front view of the sub-adapter. It is a rear view of the sub-adapter. It is a diagram for explaining the procedure for locking the cylinder flange sub adapter. It is a diagram showing a state of being rotated 90 ° (locked state) in the axial around the syringe from the state of FIG. It is a view of the flange receiving portion of the main adapter from above. Is a perspective view for explaining the internal structure of the flange receiving portion of Fig. It is a rear view of a portion of the back surface of the sub-adapters. It is a perspective view showing an example of a sub-adapter other forms. It is a diagram showing a structure of a sub-adapter of FIG. 13. Through the sub adapter 13 on the main adapter is a perspective view showing a state in which the syringe is mounted. The arrangement of such proximity sensor is a sectional view schematically showing. It is a diagram showing a part of a syringe fixed to an embodiment of the locking mechanism of the present invention. Is a perspective view showing an embodiment of a locking mechanism of the present invention. It is a front view of the locking mechanism of FIG. 18. It is a right side view and a left side view of the locking mechanism of Figure 18. It is a plan view and a bottom view of the locking mechanism of Figure 18. It is a schematic diagram for explaining a procedure for locking the syringe (flange) to the locking mechanism of FIG. 18. It is a schematic diagram for explaining a procedure for locking the syringe (flange) to the locking mechanism of FIG. 18. Is a perspective view showing an example of the injection head. It is a diagram showing another example of a flange shape of the syringe. Is a diagram showing still another example of a flange shape of the syringe. It is a diagram showing another example of the lock mechanism of the present invention. Still another example of the locking mechanism of the present invention is a diagram schematically showing. The injection head is a perspective view illustrating with syringe and adapter is attached thereto. Is a perspective view from the rear side of the adapter. The syringe adapter, shown partially broken away so that the flange locking mechanism is visible, is a perspective view from the rear side. It is a rear view of the cylinder. It is a view for explaining the method of mounting the syringe to the adapter, and shows a state in which the syringe is inserted into the adapter. It is a view for explaining the method of mounting the syringe to the adapter, and shows a state in which the syringe is held in the adapter. It is a view for explaining the flange locking mechanism according to another embodiment, showing a state in which the syringe has been inserted. Is a diagram showing the state of holding the cylinder flange of the flange locking mechanism. It is a front view of the adapter according to another embodiment. It is a perspective view showing a syringe retaining structure of an embodiment of the present invention. Syringe adapter case is a perspective view showing a state to be inserted. It is a perspective view of the adapter casing from its base end side. It is a perspective view of the adapter casing from the tip side. It is a perspective view of the syringe retaining member. It is a front view of the syringe retaining member of Figure 40. It is a plan view of the syringe retaining member of Figure 40. It is a diagram illustrating a flange shape of the syringe. It is a diagram for explaining a procedure for attaching the adapter case the syringe retaining member (front mounting). It is a diagram for explaining a procedure for attaching the adapter case the syringe retaining member (insert). It is a diagram for explaining a procedure for attaching the adapter case the syringe retaining member (fixed). It is a perspective view showing another example of a syringe. Syringe of FIG. 49 is a perspective view showing a state of being held by the syringe holding member via the adapter case.

Hereinafter, with reference to the drawings illustrating an embodiment of the present invention.
First Embodiment
As shown in FIG. 1, the liquid injector 1, the injection head 110 of the two-cylinder type types two attachable syringe 200, for mounting the syringe 200 into the injection head 110, sub-adapter 300 and the main syringe holding structure 700 having an adapter 701, and a.

Syringe 200 is available conventionally known, in this example, has a cylindrical cylinder member 210, it and a piston member 220 that is inserted slidably. The syringe, liquid medicine may be a syringe prefilled prefilled, chemical optionally in the medical field or the like may be a syringe-site filling type to be filled. In Figure 1, is depicted a plurality of ribs on the rear surface of the cylinder flange 211 of the syringe is formed. However, in the case of using the locking mechanism of the cylinder flange to be described in this embodiment, these ribs are not necessarily required.

Injection head 110, as an example, which is used attached to a moveable caster stand (not shown), in this example, the bar-shaped mounting member 119 is provided on the lower surface of the main body 113 of injection head 110 ing.

The body 113 has two piston driving mechanism to be independently driven to each other to move the piston member 220 of the syringe 200 which is mounted (not shown) is incorporated. This piston drive mechanism can employ a known mechanism commonly used in this type of implanter. Piston drive mechanism has a configured presser member so as to move forward and backward, the gripping structure (not shown) is provided at its front end. Gripping the end of the piston member in the gripping structure, to move the piston member by moving the presser member.

In the present invention, to the grip structure of the presser member may grip the piston member may be directly coupled and the presser member and the piston member via a predetermined intermediate member (adapter).

In front of the injection head 110 is the adapter holder unit 114 is provided with two for mounting the main adapter 701. The adapter holder unit 114, as shown in FIG. 2, has a holding hole 115 of circular (an example) in which a portion of the main adapter 701 is inserted, the enlarged diameter portion 115a, and a 115b. Enlarged diameter portion is formed so as to protrude radially outward and located on the left and right sides of the holding hole 115 as viewed from the front side.

Next, the structure of the main adapter 701.
The main adapter 701, as shown in FIG. 1, as an example, is to hold the syringe 200 in a state where the piston member 220 is pulled out. As shown in FIG. 2, the main adapter 701 includes a semi-cylindrical syringe supporting portion 730 for receiving a syringe, and a mounting portion 720 on the proximal end side for attaching the adapter 701 to the injection head 110.

The radius of curvature of the inner peripheral surface of the syringe supporting portion 730 is set to slightly larger than the radius of the cylinder member 210 of the syringe 200. Accordingly, so as to be capable of retaining the cylinder member 210 stably. The length of the syringe supporting portion 730 is set to a degree slightly shorter than the overall length of the syringe 200 of the piston member 220 is pulled out. As shown in FIG. 3, in a state of mounting the syringe 200 into the main adapter 701, the distal end side of the syringe 200 is adapted to protrude from the distal end of the adapter 701.

As shown in FIG. 1, a portion of the syringe supporting portion 730, i.e., slightly tip closer position than the center in the length direction of the syringe supporting portion 730, a groove-shaped adapter receiving for receiving a sub-adapter 300 part 740 is provided. Since the sub-adapter 300 as described below is substantially U-shaped part as a whole, and is formed into a substantially U-shaped adapter receiving portion 740 also correspondingly.

As shown in FIG. 2, the mounting portion 720 provided at the proximal end portion of the main adapter 701 includes a shaft portion 721 which is inserted into the holding hole 115 of the injection head 110 described above, provided, one above and below engagement flange 721a, and a 721b. Note that these engagement flange so drawn in a state where the main adapter 701 in FIG. 2 is rotated 90 ° about its axis is positioned on the left and right sides of the shaft portion 721. Further, for convenience of illustration, only one of the engagement flange 721a is depicted. The main adapter 701 inserts the mounting portion 720 in the holding hole 115, is fixed to the injection head 110 by a predetermined angle.

Incidentally, a method for fixing the main adapter to the injection head is not limited to the above, it may employ various methods. For example, if the clamper and the like is provided on a portion of the injection head may be a method for fixing the main adapter by the clamper. While the invention has been particularly shown and described scheme is fixed by the main adapter is rotated around the axis in the longitudinal direction, such rotation is not necessary.

Besides, it may be as follows. With flange is provided on a portion of the main adapter, locking groove for receiving the flange portion of the injection head is provided. By inserting in a sliding manner to the flange of the main adapter to the locking groove, the main adapter is fixed to the injection head.

As shown in FIG. 2, the boundary portion between the mounting portion 720 and a syringe support 730, contours are substantially circular flange portion 723 is formed. The flange portion 723 is responsible for defining the amount of insertion of the main adapter 701 to the holding hole 115 of the injection head 110. As shown in FIG. 1, in a state of mounting the main adapter 701 in injection head 110, so that the rear surface of the flange portion 723 abuts (surface contact) part of the front surface of the injection head 110.

Next, sub-adapter 300 will be described in detail.

Sub adapter 300 is for holding the cylinder flange 211 of cylinder member 210, as shown in FIG. 1, a substantially U-shaped as a whole. Specifically, sub-adapter 300, as shown in FIG. 4, a base member 310 which is curved in an arc shape so as to expand upward, the flange for locking the cylinder flange 211 fixed to the base member 310 and a locking member 320.
The base member 310 and the flange locking member 320 in the present embodiment is configured as separate parts from each other, but they may be formed integrally in one piece.

The base member 310 is a member that the inner peripheral surface 311 formed in a substantially arc shape, the radius of curvature of the inner peripheral surface 311 is smaller than the radius of curvature of the outer peripheral surface of the cylinder flange 211, the piston 220 of the syringe 200 piston 220 when it was moved is the radius of curvature so as not to interfere.

Flange lock member 320 has an arcuate portion 321 whose inner circumferential surface 321a formed in a substantially arc shape, the arc-shaped portion 321 is superposed on the base member 310. Arcuate portion 321, so that its center of curvature of the inner edge is positioned on the center of curvature coaxial with the inner edge of the base member 310, are superimposed.

In the present embodiment, the arc-shaped portion 321 is formed in an arc shape as a whole, the arc-shaped portion 321, when at least the inner peripheral surface is formed in a circular arc shape, the outer surface shape of arbitrary shape it may be at.

Flange locking member 320, which further includes a pair of arm portions 322 and 322 from both ends of the arcuate portion 321 extends out upward as a whole as a U-shape. Each arm section 322, so as to be able to change the distance therebetween and is displaceably supported with respect to the arc-shaped portion 321. Fixing the flange locking member 320 to base member 310 is made an arcuate portion 321.

The radius of curvature of the inner circumferential surface 321a of the arcuate portion 321, as the outer peripheral surface of the cylinder flange 211 is supported on the inner peripheral surface 321a, approximately equal to the radius of curvature of the outer peripheral surface of the cylinder flange 211. The curvature of the inner peripheral surface 311 of the base member 310 radius (diameter), and the curvature of the inner circumferential surface 321a of the flange locking member 320 radius (diameter), are respectively defined as above. As a result, a step is formed between the arcuate portion 311 of the base member 310 and the flange locking member. Surface of the base member 310 formed by this step is a surface 330 facing the rear surface of the cylinder flange 211 (see FIG. 4).

The distal end of each arm portion 322, the knob portion 325 picked by the user when attaching and detaching the flange adapter 300 is formed. Grip portion 325, a portion of the surface of the inward is located on the extension of the arc shape of the inner circumferential surface 321a of the arcuate portion 321.

Thus, the flange locking member 320, as a whole, has a shape to accept the cylinder flange 211 on its inside. The locking member 320, together with the surface 330, receive a portion of the cylinder flange 211 removably, constituting a flange receiving corresponding to the shape of the cylinder flange 211. A pair of arm portions 322 and 322 are located on both left and right sides of the cylinder flange 211 received in the receiving flange.

As a result of the pair of arm portions 322, 322 are configured in the shape, the flange locking member 320 is a pair of arm portions side is slightly narrowed shape. With such a configuration, as will be described later, it can be prevented from coming off the sub-adapter 300 of the cylinder flange 211 during use.

Next, sub-adapter 300 will be described cylinder flange 211 of the syringe 200 to be held.
As shown in FIG. 5, the cylinder flange 211 is basically formed by a diameter D both left and right sides (opposing portions to each other) are cut in parallel. Thus, the outer peripheral edge of the cylinder flange 211 is shaped to have two cutting portions 213 formed at a position facing each other and a circular arc portion 212 connecting these cuts 213. The distance A between the cut portion 213 is smaller than the diameter D of the arcuate portion 212. The recess 212a on the outer peripheral surface of the arc-shaped portion 212, so that a point-symmetrical with respect to the center O of the cylinder flange 211 is formed in a position rotated 90 degrees with respect to the cut portion 213.

Returning again to the description of the sub-adapter 300, as shown in FIGS. 6 and 7, the arm portion 322 of the flange locking member 320 has a locking pawl 323 as the flange lock mechanism. The locking pawl 323 is out extending downwardly from the knob portion 325 toward the arc-shaped portion 321. Each lock pawl 323 is supported to the grip portion 325 so as to elastically displaced outwardly, and the convex portion 323a on the tips of the lock pawls 323 that protrude inwardly from each other are formed.

These protrusions 323a, 323a are formed in dimensions to engage the recess 212a, 212a of the cylinder flange 211 shown in FIG. The distance between the two protrusions 323a is greater than the distance A between the cut portion 213 of the cylinder flange 211, and smaller than the diameter D of the arcuate portion 212.

The sub adapter 300 which is in the configuration as described above, the cylinder flange 211 of the syringe is inserted as follows, are retained.
First, as shown in FIG. 8, to insert the syringe 200 to the sub-adapter 300 in a posture in which the cut portion 213 of the cylinder flange 211 is opposed to the locking pawl 323. Thus, the syringe 200 without interfering with the locking pawl 323, arcuate portion 212 of the cylinder flange 211 are inserted into the sub-adapter 300 until it abuts against the arcuate portion 321 of the flange locking member 320.

In this state, it causes the rotation of 90 degrees of the cylinder 200 about its axis (either clockwise or counter-clockwise). Then, the arc-shaped portion 212 of the cylinder flange 211 abuts against the lock pawl 323 is elastically displaced outwardly to lock claw 323. Finally, the projecting portion of the locking pawl 323 as shown in FIG. 9 is engaged with the recess 212a of the cylinder flange 211. Thus, the syringe 200 is locked elastically.

Force for locking the syringe 200 by the lock pawl 323 is syringe 200 in connection work or the like of the extension tube to the subsequent syringe 200 (not shown) does not rotate, in order to disengage the locking pawl 323 and the recesses 212a user when rotating the syringe 200 is preferably set to force that can be rotated at moderate force.

Next, FIG. 10, a description will be made of an internal structure of the adapter receiving portion 740 with reference to FIG. 11. Incidentally, 10 and 11 show an arrow direction front end side of the syringe.

Adapter receiving portion 740, as shown in these figures, and has a guide groove 717,717 on both sides for guiding the insertion of the sub-adapter 300. Each guide groove 717 extends in the insertion direction of the sub-adapter 300 (vertical direction in FIG. 1). Specifically, by forming the two ribs 715 and 716 extending in the insertion direction on the inner surface of the adapter receiving portion 740, a groove between them are formed.

On the other hand, as shown in FIG. 7, the base member 310 of the sub-adapter 300, the ribs 312 are inserted into the guide groove 717 is formed on both sides in the width direction of the base member 310.

As shown in FIG. 6, on the outside of the arm portions 322 of the flange locking member 320 engaging claw 324 is formed. In response to such engagement claws 324 of the sub-adapter 300, as shown in FIGS. 10 and 11, on both sides in the adapter receiving portion 740 engaging claw 718 (engaging portion) are provided one by one ing.
Engaging claws 324 and the engaging claw 718 is a structure for locking the sub-adapter to the main adapter (adapter fixing mechanism). When the sub adapter 300 is inserted to a predetermined position of the adapter receiving portion 740, the engaging claw 324 and the engaging claw 718 engage with each other.

Engagement and release of the engaging claws 718 of the engaging claw 324 and adapter receiving portion of the sub-adapter is achieved by the following configuration. The portion of the flange locking member 320 to at least the engaging claw 324 is formed is male displaceably supported inwardly each other, preferably each of the arm portions 322 inwardly to each other of the adapter 300 as described above (FIG. 6 see white arrows) that are elastically displaceably supported in.

For the elastic displacement, in this embodiment, the entire flange lock member 320, the engaging claw 324 is formed of a material having a degree of elasticity that can engage elastically deformable claw 718 of the adapter receptacle 740 there. As such an elastic material, polyamide, polycarbonate, polyacetal, resin material such as ABS, and the like metal material such as phosphor bronze.

By forming the entire flange lock member 320 of an elastic material, it can be achieved at the same time described above, also the elastic deformation capability of the lock claw 323. Therefore, the flange lock member 320 can be composed of one piece, the structure of the flange locking member 320 is simplified.

Incidentally, if the engagement claw 324 as in the present embodiment is formed on the arm portion 322 may be configured only arm portion 322 of the flange locking member 320 of an elastic material. Alternatively, may constitute arm portion 322 as a separate part which is resiliently biased by a spring or the like to the other part, in this case, the material of each part is not particularly limited.

In any case, when retrieving sub adapter 300 inserted into the adapter receiving portion 740 from therefrom to each other displaced inward arm portion 322 by pulling the sides of the knob portion 325 and 325, engaging claws to release the engagement between the 324 and the engaging claw 718.

When flexing the arm portions 322 and 322 inwardly unnecessarily flange lock member 320 may be damaged.
Therefore, in the present embodiment, as shown in the enlarged view of FIG. 12, it is provided structure for limiting the amount of displacement of the inner arm 322. That is, each of the base member 310 and the flange locking member 320, the abutment surface 313,327 which face spaced from each other, are formed as a stopper structure. When displacing the (left side in FIG. 10) the arm portions 322 inwardly, each abutment face 313,327 abut one another, the arm portion 322 is not displaced any more. Thus, damage due to excessive displacement of the arm portion 322 is prevented.

The arm portion 322, the inclined ribs 326 are formed. The inclined rib 326 on the extension of the ribs 312 formed in the base member 310, and is provided at a position corresponding to the upper end portion of the guide groove 717 when the cylinder flange 300 is inserted into the adapter receiving portion 740 there. Inclined rib 326, the end of the side away from the rib 312 is inclined so as to approach the inner rib 715 of the ribs 715, 717 shown in FIG. 10. When displacing the arm portions 322 inward in a state where the sub-adapter 300 is inserted into the adapter receiving portion 740, the inner surface of the inclined rib 326 abuts against the upper end of the rib 715.

Incidentally, shows only one arm portion 322 in FIG. 12 are configured similarly for the other arm portion 322.

Next, using sub adapter 300 described above, it will be described detachment operation of the syringe 200 into the injection head 110.

Person, first, with the sides of the knob portion 325, 325 of the sub-adapter 300 and inserts the sub-adapter 300 to the adapter receiving portion 740 of the main adapter. Mounting the sub-adapter 300 to the adapter receiving portion 740 (lock) includes a engaging claw 118 in the adapter receiving portion is made by the engagement of the engaging claw 324 of the sub-adapters.

For mounting the sub-adapter 300 to the main adapter 701, as described above, since the good only by inserting the sub-adapter 300 to the adapter receiving portion 740, it is very simple.

When inserting the sub-adapter 300 to the adapter receiving portion 740, the rib 312 of the sub-adapter is guided by the guide groove 717 in the adapter receiving portion 740, it can be inserted smoothly.

In addition, the following advantages are obtained because the ribs 312 are formed on the sub-adapter 300. That can not be inserted sub adapter 300 rib 312 becomes a hindrance in the case where the orientation of the sub-adapters 300 and front and rear opposite to the adapter receiving portion 740. Therefore, it is possible to prevent the mounting in a direction wrong sub adapter 300.

After mounting of the sub-adapter 300, the user mounts the syringe 200 to the sub-adapter 300. Mounting of the syringe 200 is performed as follows.

First, as shown in FIG. 8, the user is in the sub-adapters 300, arcuate portion 212 of the cylinder flange 211 inserts the syringe 200 until it abuts against the arcuate portion 321 of the flange locking member 320. At this time, by inserting a syringe 200 in the right and left posture of the cutting portion 213, 213 to face the lock claw 323, 323 of the cylinder flange 211 may be inserted syringe 200 smoothly.

Then, the user rotates the syringe 200 about its axis. As described above, in the present embodiment, the tip end of the syringe (in this example, about half of the total length of the cylinder member) at setting the syringe 200 into the main adapter 701 configured to protrude from the tip of the main adapter are (see Figure 3). Thus, the user can rotate the syringe grab portion of the protruding syringe.

On the other hand, the remaining portion of the cylinder member 210 is supported by a semi-cylindrical syringe supporting portion 730 of the main adapter 701. Thus, the user can be accurately rotate the syringe 200 about its axis. Even by an arcuate portion 321 of the arc-shaped portion 212 and the flange locking member 320 of substantially equal cylinder flange 211 radius of curvature to each other are in contact, as described above, accurate rotation about the axis of the syringe 200 There is realized.

When the arc-shaped portion 212 of the cylinder flange 211 by rotation of the syringe 200 comes to a position facing the locking pawl 323, the locking pawl 323 is elastically displaced outward by being pressed by the arcuate portion 212. Further rotating the syringe 200, as shown in FIG. 9, the recess 212a of the cylinder flange 211 reaches a position facing the convex portion of the tip of the lock claw 323, the locking pawl 323 is returned, the locking pawl 323 is a cylinder flange 211 engages in the recess 212a of the. This syringe 200 is locked and held in the sub-adapter 300.

Lock syringe 200 is made by engagement of the locking pawl 323 and the recesses 212a, the click feeling at the time of engagement, the user can verify a successful set. For example, even in the lock to confirm visually pile situation of there syringe 200 in injection head 110 is a high position, the user, by clicking feeling can reliably recognize that the syringe 200 is locked.

By syringe 200 is held as described above, the mounting of syringe 200 into the injection head 110 is completed.

Removal of the syringe 200 from the sub-adapter 300 may be a series of operations and reverse operation described above. That is, the user may first (may be the same rotational direction as described above, which may be a reverse direction) the syringe 200 rotating by being allowed to release the engagement between the lock claw 323 and the cylinder flange 211. Then, in that state (see FIG. 8), pull the syringe 200 from the sub-adapter 300.

According to the syringe holding structure 700 of the present embodiment described above, it is possible through the main adapter 701 and supplicant adapter 300, to satisfactorily hold the syringe 200 in injection head 110.

Rather than utilizing an adapter, such as a mains adapter 701 and the sub-adapter 300 are integrated, according to the configuration for holding the syringe by combining two adapters 701,300 as in the present embodiment, the following there is an advantage, such as. That is, rather than replacing the entire single adapter can correspond to various types of syringe simply by replacing the sub-adapter 300. For this reason, it is advantageous in terms of cost it is not necessary to make the main adapter also a number. Moreover, it is not even to take in waste storage location since it is not necessary to prepare a large number of the main adapter to the medical field.

Also, mounting and removal of the sub-adapter 300, as described above, can be performed by operation of connecting or disconnecting the sub-adapter 300 to the main adapter of the adapter receiving portion 740, is very simple.

On the other hand, remove the syringe from the state where the syringe 200 is mounted as shown in FIG. 3, it is necessary to rotate the syringe 200 about its axis. Therefore, it is possible to prevent the deviated unintentionally syringe 200.

The advantages of sub-adapter 300 of the present embodiment, also exemplified as follows. That is, as described above, the arm portion 322 is inclined rib 326 is formed, the inclined ribs 326, by displacing the arm portions 322 inwardly, the upper end portion of the ribs 715 formed in the adapter receiving portion 740 It comes into contact with. The force tilted ribs 326 at this time receives from the rib 715, the sub-adapter 300, the sub-adapter 300 is the direction to escape from the adapter receiving portion 740, an upward force is applied in FIG. 12. Therefore, when the displacement of the arm portions 322 inwardly, the sub-adapter 300 is lifted from the adapter receiving portion 740, it is easily removed sub adapter 300.

Further, as described above, knob 325 of the arm portion 322, a part of the surface of the inward position on the extension of the arc shape of arc-shaped portion 321 having a radius of curvature corresponding to the diameter of the cylinder flange 211 are doing. That is, in a state in which the cylinder flange 211 to the inside of the flange locking member 320 has been accepted, a part of the inner facing surface of the knob portion 325 interferes with the outer peripheral surface of the cylinder flange 211. In such a configuration, it is impossible to displace the arm 322 until it is possible to release the engagement between the engaging claw 324 and the engaging claw 118 inward (direction of approaching each other). That is, in this state, the knob portion 325 of the arm portion 322, which functions as a release prohibition mechanism for prohibiting the lock sub adapter is released by the adapter fixing mechanism (324,718).

According to such a configuration, in a state in which the syringe 200 to the sub-adapter 300 is held (for example, at the time of liquid injection) is not able to remove the sub-adapter from the main adapter. Therefore, it is no deviate unexpectedly sub adapter in the chemical liquid injector.

Second Embodiment
13 to 15 show the sub-adapter 400 which correspond to the different sizes of syringes to the above embodiment. Hereinafter, the sub-adapter 400 of the present embodiment, the point similar to embodiments described above will not be described, mainly explaining differences.

The sub adapter 400 are those corresponding to the 100ml type of syringe 200 'as an example (see Figure 15). Sub adapter 400, similar to the embodiment described above, has a base member and the flange locking member. Sub adapter 400 can be detachably attached to the adapter receiving portion 740 of the main adapter 701 (see FIG. 1). The corresponding structure with adapter receiving portion 740 for mounting is the same as the embodiment described above.

The sub adapter 400, rather than the syringe of the first embodiment holds the small diameter of the syringe (see Figure 15). If you try to mount small-diameter syringe 200 'to the syringe supporting portion 730 of the main adapter, thus lifted from the syringe support 730 for that cylinder member is small. Therefore, in this embodiment, it is formed integrally with the cylinder supporting unit 414 for supporting the cylinder to the base member.

Cylinder support portion 414 is formed into a substantially semi-cylindrical shape extending over the recess 114 of injection head 110 when mounted on injection head 110. Further, the radius of the inner circumferential surface of the cylinder support portion 414 is substantially equal to the radius of the outer circumferential surface of the cylinder to retain. This makes it possible to support the small-diameter syringe stably in injection head 110.

The base member, as shown in FIG. 13, two plate-shaped portions 415,415 opposite spaced surface 430 is formed on both sides in the width direction of the base member. Spacing between the surface 430 and the plate-like portion 415 is greater than the thickness of the cylinder flange. Thus, it is possible to hold the cylinder flange between the surface 430 and the plate-like portion 415. Along with the plate-like portion 415 on the base member is formed, the ribs 412 serving as a guide when mounting the cylinder flange 400 to the injection head is formed on the outer wall surface of the plate-like portion 415.

In response to the plate-like portion 415, even the flange locking member, two plate-like portion 428 facing spaced surfaces 430 and spacing, it is formed on both sides in the width direction of the flange locking member. Along with this, the inclined ribs 426 are formed on the outer wall surface of the plate-like portion 428.

In addition, these plate-like portions 415,428 are formed so that their end faces when trying to arm portion 422 is excessively displaced contacts, also functions as a stopper to prevent excessive displacement of the arm portion 422 It is.

The lock claw 423 is flange lock mechanism is elastically displaceably supported in the arc-shaped portion, and extends toward the arm portion 422 along from there to the arc shape. Thus, the form of the flange locking mechanism is different from the flange lock mechanism of the sub-adapter 300 described above, its function and syringe detachable operation is the same.

Incidentally, it can either be applied a flange lock mechanism of the present embodiment the flange lock mechanism of the sub-adapter 300 described above, and vice versa.

As described above, by preparing a plurality of types of sub-adapters 300, 400 corresponding to different syringes shapes, it can be fitted with each syringe for the main adapter 701. Moreover, the locking mechanism of the sub-adapters to the main adapter are the same also with each adapter 300 and 400, the syringe can firmly hold, and is easily removable syringe.

Further, in this embodiment, in any of the sub-adapters 300 and 400, the (i) the cylinder flange portion is inserted into the adapter, (ii) thereafter, rotated by 90 ° about the axis of the cylinder in that position, the common that in a manner, attachment to sub adapter of the syringe are performed. For example a 100ml syringe type, if different mounting scheme between 200ml syringe type, the user must remember both mounting method, it may usability is not good. In contrast, according to the present invention, it is possible to mount the respective syringes in a common manner, usability is good. In addition, the occurrence of human error at the time of syringe mounting can be reduced.

[Adapter identification member]
When using a plurality of types of sub-adapters 300, 400, etc., what sub-adapter is mounted, in other words, how the syringe is convenient to be able to easily identify like or are attached. Therefore, it is preferable to provide an adapter identification member used to identify the type of sub-adapters.

Sub adapter, up to four are configured to be able to have a detected object (details will be described later), the object to be detected the number as an adapter identification member, position, each at least one type of adapter material and Attaching It is different to.

On the other hand, the injection head side (to be precise, the main adapter side) has at least one sensor for detecting individually detected object. Sensor is provided at a position opposite to the position where it can be detected object is attached in a state in which the syringe adapter is mounted. From the combination of the detected object detected by the sensor, which sub-adapter can identify whether the fitted. Further, the object to be detected at any position is to be detected, the sub-adapter determines not loaded.

The position and number of the detected object is not particularly limited, it can be appropriately set according to the type of sub-adapter to be mounted. For example, if there are few types of sub adapter can be a much smaller number of the detected object. Types of sub-adapters often, only four of the detected object not be supported may also be four or more to be detected the number.

Adapter identification member can be composed of various materials such as metal or plastic. The sensor for detecting the adapter identifying member can be any sensor that can detect the adapter identification member when the sub-adapter is properly mounted.

In particular, it can be preferably used a proximity sensor for detecting the presence and position of an object without contact. Exemplary proximity sensors detect the presence or position of an object the magnetic as the detection medium. The magnetic type proximity sensor detects is a direct current static magnetic field and an AC magnetic field.

(1) When using a proximity sensor to detect the medium a DC magnetic field as the sensor, as the adapter identification member can be used a magnet. The proximity sensor can detect the magnet, a semiconductor magnetic sensor such as magnetic resistance element or Hall element, and the flux gate type sensor, MR (Magneto-Resisutive) element, a ferromagnetic magnetic sensor such as MI (Magneto-Impedance) elements it can be used.

Proximity sensor for detecting a DC static magnetic field, detecting the polarity of the magnet. Therefore, at least one magnet as an adapter identification member, placing orientation of individual polarity differently for each type of sub-adapters. Sensors that so as to detect the polarity of the magnet, the combination of the polarity of the detected magnet can be any sub adapter to identify whether the fitted. However, in this case, it becomes impossible normal detected when the sensor is from the possible to detect the polarity of the magnet, it got attached with the polarity of the magnet on the reverse by the work mistakes.

(2) the proximity sensor to AC magnetic field detection medium, the metal can be used as an adapter identification member, no problem occurs due to operational mistakes as described above. Further, the proximity sensor to AC magnetic field detection medium, in comparison with the proximity sensor to a DC static magnetic field detection medium, since the distance that can detect the adapter identification member is small, that the sub-adapter is attached to the normal position it can be more accurately detected. Therefore, in the present invention, as a sensor for detecting the adapter identifying member, it is preferable to use a proximity sensor to AC magnetic field detection medium.

Proximity sensor for an AC magnetic field detection medium that has a coil and by supplying a constant AC current from the AC power supply to the coil providing an alternating magnetic field to the metal (the adapter identification member) eddy currents in the metal occurs use the to. Eddy current generated in the metal results in the magnetic field, the induced voltage is generated in the coil. Consequently, when the close of the metal coil, the impedance of the coil changes the ratio of voltage generated in the coil relative to current supplied to the coil, the proximity sensor detects the metal by utilizing a change in impedance.

Proximity sensors of this type can be broadly divided into a multi-coil having a single-coil type, a plurality of coils. In single-coil, the one coil, at the same time as the function of the exciting coil to provide an AC magnetic field to the adapter identification member, both a function as a detection coil for detecting the eddy current magnetic field generated from the adapter identifying member.

The types of proximity sensors of a single coil type high frequency oscillation type and filter type and the like. Proximity sensors Inductive incorporates a detection coil in a part of the oscillating circuit, for detecting a change in the oscillation amplitude or the oscillation frequency in response to the impedance change. Filter proximity sensor incorporates a detection coil in a portion of the filter circuit of the LC or LR, utilizing the fact that the filter characteristic is changed by the impedance change of the detection coil.

The types of proximity sensors of a multi-coil type, a double coil type, and a differential coil type and fork coil type.

Double coil type proximity sensor uses two coils of the same structure. Meanwhile it moved close to the adapter identification member as the detection coils are arranged so as not to be influenced by the adapter identification member in the reference coil to the other. By comparing the difference in induced voltage to energize the two coils in the same conditions, the detection coil is influenced by the approach of the adapter identification member, difference between the induced voltage is due to the approach of the adapter identification member It turns out that. As a method of the detection circuit to configure the impedance bridge with two coils, which was excited by a fixed oscillator, a method for detecting a phase with respect to the amplitude and the exciting current of the unbalanced voltage is common. Alternatively, returned to the excitation side of the bridge circuit by amplifying the unbalanced voltage obtained from the bridge circuit, there is a method of detecting the amplitude by oscillating circuit.

Proximity sensor differential coil type, in general, the detection coil on either side of the exciting coil is placed symmetrically to the detection output terminal to connect the terminals of the detection coil in series opposite polarity. Since the excitation magnetic flux that generates equal induced voltage in the detection coil, the induced voltage due to the excitation magnetic flux is canceled, similar to the double coil type, it is possible to retrieve only the induced voltage by the magnetic flux eddy currents make. After that, similarly to the double coil type, or detect the amplitude and phase of the output voltage of the detection coil terminals, amplifies the voltage of the detection coil terminals returned to the exciting coil, it may be or is oscillated.

Proximity sensor Hawk coil is previously made a magnetic coupling disposed face to face the exciting coil and the detection coil, detects a change in the amplitude and phase of the induced voltage generated in the detection coil by inserting the adapter identification member therebetween to.

This completes the description of the various proximity sensors capable of detecting a metal in a non-contact AC magnetic field as the detection medium. The present invention is also any of these available. When using a proximity sensor capable of detecting a metal, the adapter identification member may be composed entirely of metal, it may be partially made of metal.

The size and shape of the adapter identification member may be any if not interfere with the mounting of the sub-adapters. Preferably, the adapter identification member may be a ball plunger.

When using the ball plunger as the adapter identifying member, ball plunger, a portion of the ball, preferably mounted to protrude from the surface of the sub-adapters. On the other hand, receiving the adapter, the ball plunger opposite the position with sub-adapter is mounted on the receiving adapter, the recess or the through-hole housing the proximity sensor is provided. In the recess or through-hole, it is preferable that the ball of the ball plunger configured to engage. Thus, it is possible to provide an auxiliary locking sub adapter for adapter receives the adapter detection means.

Proximity sensors, for example, can be placed in the formed recesses or through holes in the receiving adapter, in which case, the proximity sensor may be held by press fit in a recess or through hole, held in screw- it may be. Adjusting the position of the proximity sensor in the recess or the through-hole by holding the proximity sensor in a screw-and removal for replacement of the proximity sensor can be easily performed. The recess or the through-holes may be filled with resin. This increases waterproof proximity sensor, it is possible to reduce the risk of failure proximity sensor when the drug solution or the like is attached.

In the example of FIG. 16, the proximity sensor 846 is provided to detect the presence and position of an object without contact. Proximity sensor 846, in one example, may be provided in a part of the adapter receiving portion 740 of the main adapter 701 (through holes 841b).
The sub-adapter 300, the adapter identification member 847 which is detected by the proximity sensor 846 is disposed. Adapter identification member 847, in one example, is provided in the through hole 842b.

In the present invention, by using a proximity sensor (one example) as described above, it is also possible to main adapter in a predetermined position of the injection head to adopt a configuration to detect whether attached. In this case, for example, together with the identification member as described above to the main adapter attached, the detector such as a proximity sensor to the injection head may be provided.

Other forms, for example, using an RFID tag (an example) and its detector and the like, detection of the presence or absence of mains adapter (the adapter may be a detection of whether or not attached to a predetermined position) There may be implemented. In this case, in addition to such RFID tags, for example, it is a detector is used to bar code and detect it.

As another embodiment, for example, it may be an RFID tag or the like of the reader (detector) is provided on the main adapter. The reader is for reading the RFID tag or the like provided to the syringe. Such readers by providing the main adapter, can be satisfactorily read information of the RFID tag or the like of the syringe even in the configuration using the main adapter as in the present invention.

The reader system for supplying power to include, but not particularly limited, may be as follows as an example. That is, the electrical contacts on the part of the main adapter (this electrical contact is a reader electrically connected) is provided. The electrical contact comes into contact with the predetermined electrical contact of the head-side when mounting the main adapter on the injection head. By each other electrical contact abuts, power is supplied from the injection head side to the reader.

Although the present invention has been described as an example a typical embodiment the present invention is not limited to the embodiments described above.
For example, the sub-adapters, corresponding to the shape and size of the cylinder flange of the syringe or the like for retaining the structure and size or the like of the flange receiver and flange lock mechanism can be changed as appropriate. The above sub-adapter may also be applied to the drug solution filling devices for filling liquid medicine into an empty syringe.

In the above embodiment has been described a pair of left and right locking claws sub adapter recess 212a of the cylinder flange circumference, it is engaged with the 212a mechanism for locking the flange. However, the present invention is not limited thereto, as long as it can be a cylinder flange encased in a sub-adapter lock the cylinder flange was rotated by a predetermined angle, its structure is specifically limited not.

[Other examples of the flange locking mechanism 1]
Flange locking mechanism may be such as a locking mechanism A50 to be described below.

As shown in FIG. 17, the syringe A10, the piston member (not shown) has a cylindrical cylinder member A11 is inserted slidably. The syringe A10 itself is conventionally known. In the vicinity of the proximal end of the cylinder member A11, a substantially disc-shaped flanges A16 which protrudes radially outward is formed.

As shown in FIG. 17 (a), the left and right sides of the flanges A16 is cut longitudinally (cut portion A17, A17).

The flanges A16, a surface of the base end side of the syringe near the position of each cut portion A17, a pair of flanges ribs A19, A19 are provided. As shown in FIG. 17 (a), in one of the cut portion A17, the flange ribs A19, A19 are provided one at each end of the cut portion A17 (upper and lower ends). Dimensions d1 between the tip of the flange rib A19 is about 14mm, for example.

As shown in FIG. 17 (a), each flange ribs A19 extends laterally (direction orthogonal to the cut portion A17). And side A19a of the upper flange rib A19, side A19b of the lower flange ribs has an inclined surface that the space narrows as going radially outward.

As shown in FIG. 17 (b), each flange ribs A19 protrudes in the thickness direction of the flange A16 (see FIG. 17 (b)).

Figure 18 is a perspective view showing the syringe locking mechanism A50 of the present embodiment. FIG. 19 is a front view of the locking mechanism A50 of FIG. 18. Figure 20 is a right side view and a left side view of the locking mechanism of FIG. 18, FIG. 21 is a plan view and a bottom view of the locking mechanism of Figure 18.

As shown in FIG. 18, the syringe locking mechanism A50 is formed substantially in a U-shape as a whole. Locking mechanism A50 has a flange receiving grooves A77 of the substantially U-shaped and holds the flange A16 syringe A10 in the groove A77.

The locking mechanism A50, for example, may be provided integrally as part of the injection head, to a portion of the injection head (corresponding to the receiving unit 740 of FIG. 1), so as to be removably mounted it may be configured to. As an example, the locking mechanism A50 is arranged in a direction near side of FIG. 18 is a front side of the injection head A1.

As shown in FIG. 18, the locking mechanism A50 constitute the lower half of the U-shaped (more accurately, further constitutes the rear side substantially half of the thickness direction of the bottom half) and the base member A51 of the arc and a movable member 61 of the U-shape attached to the front side so as to overlap in the member A51.

Both members are screwed at the movable member two screw holes A68 provided in the lower part of the A61, A68 (an example) are fixed to each other.

Movable member A61 includes roughly includes a fixed portion A61A occupying a certain range around the two screw holes A68, and the pair of arm portions from both sides extend out above the fixing portion A61A A67, A67 .

A pair of arm portions A67, A67 is configured to shrink enlarged flexed elastically. For example, by the tips of the arms A67, A67 closer together by pinching with fingers, the arm portions A67, A67 is elastically deformed inwardly. To restore to the original shape by releasing the finger. Conversely, if the inner, it receives a force in the radial outward, each arm portion A67, A67 are elastically deformed outward.

The upper end of each arm portion A67, the guide portion A66 extending gently upward to make it easier to induce flanges A16 in the lock mechanism is formed. In particular, in the present embodiment, since the guide portion A66 is formed sufficiently large in the thickness direction (front rear direction) and the transverse flange, easily put flange in the lock mechanism.

As the material of the base member A51 and / or movable member A61, for example, polyamides, polycarbonates, polyacetals, may be a resin such as ABS. Further, it may be a metal material such as phosphor bronze. It both members may be either a resin material or a metal material, only the other one is a resin material may be a metal material.

As shown in FIG. 18, the inside of the pair of arm portions A67, A67 and the fixed portion A61A, has a substantially U-shaped flange receiving groove A77 as a whole.
In Figure 18, the only surface of the back side of the flange receiving groove A77 is present, the configuration side of the front side is not present is depicted. Here, the side surface of the front side may be provided in advance plane to the injection head side, the surface of the injection head side and cooperates and the inner surface of such a movable member 18, substantially the entire U shaped flange receiving grooves A77 may be adapted to configure (sectional concave).

In particular, the surface of the front side, for example, if made of metal is a surface formed on the member with sufficient rigidity, deformation and damage of the member occurs even flanges A16 when liquid injector is pressed against the front side Nikuku can receive the flange A16 good.

As shown in FIG. 18, horizontal flat surface on the bottom of the flange receiving grooves A77 (receiving surface) A63 is formed. The flat surface A63, as described below, is a surface which slides the outer peripheral portion is pressed against the flange.

As shown in FIG. 19, the inner circumference of the arm portion A67 has an arc portion of the two (an example). One of which is a circular arc part 68a that extends out upward from the right and left end portions of the flat surface A63, the radius of curvature of the arc is substantially the same as the radius of the flange 16 of the syringe. Arc portion A68a extends from the end portion of the flat portion A63, to the vicinity of the point of intersection with the horizontal line L1 in FIG. 19. Incidentally, L1 is a horizontal line passing through the center (also referred to as the arc center of the flange receiving grooves A77) O1 of arc portion A68a.

Arc portion other constituting the inner periphery of the arm portion A67 is an arc portion A68b, further extends out upward from the upper end of the arc portion A68a. The arc portion A68b is from the vicinity of the horizontal line L1, and extend upward further by a predetermined angle alpha. Since the left and right sides of the arc portion A68B, A68B are extending out to the upper side, the dimension between the arm portions A67, A67 are gradually narrower as going upward from the horizontal line L1.

As an example, the dimensions d3 between the tips of the arm portions A67, A67 are shorter than the diameter of the flange d0 (see FIG. 17), and, longer than the dimension d2 between the cut portion. By being configured in this manner, it is not possible to insert the flange A16 in the groove A77 is in a state where the flange A16 sideways, while the flange A16 in the groove A77 in a state where the flange A16 vertically It is adapted to be inserted.

The arc portion A68b (see FIG. 19), as will be described later, a portion in contact with the outer periphery of the flange A16 syringe serves for pressing the flange into a substantially downward. To achieve this, as an example, the curvature of the arc portion A68b radius is smaller than the radius of the flange A16. Alternatively, its center point is the same radius of curvature as the flanges A16 may be set below the O1.

As described below, it received when rotating the flange A16 syringe in the groove A77, and the inner periphery of the outer peripheral flange A16 and an arc portion A68b abuts. Then, the arm portion A67 is widened as rotating the flange A16, it receives the reaction force, so that the flange A16 is pressed against the substantially downward.

Referring again to FIG. 18, the upper slightly across the flat surface A63, a pair of guide ribs A55, A55 are provided. Guide ribs A55, A55 are provided in a part of the base member A51, it protrudes in the thickness direction of the base member 51.

The guide rib A55, as shown in FIG. 19, gently curved toward the inside of the flange receiving grooves A77 (inside becomes lower) and the rib top surface A55a, obliquely downward from the inner end of the rib top surface A55a It has an inclined surface A55b which extends out, the.

Rib top surface A55a, as described later, the front end is a curved surface that slides the tip of the flange ribs A19 of the syringe abuts (Figure 23 (e) see also). Inclined surface A55b is inclined approximately at the same angle as the side surface of each flange rib A19 (sign 19a, 19b see FIG. 17) (see FIG. 23 (f)).

Next, FIG. 22, with reference to FIG. 23, the procedure of placing the syringe in the locking mechanism of the present embodiment configured as described above will be described.
Incidentally, FIG. 22, FIG. 23, the relationship between the main structural parts of the lock mechanism A50 and the flange ribs A19 etc. easy understanding, somewhat schematically shown by omitting unnecessary portions. 22, FIG. 23 is a view of the locking mechanism A50 from the front side of FIG. 18. In these figures, so for clarity, both the flange A16 and the flange ribs A19 are depicted in solid lines. However, in practice, the flange ribs A19 is present in the back than the flange A16. Further, in order to simplify the illustration, the flange ribs A19, A19 also depicts only those on one side of the cut portion A17.

In the following, an example will be described to lock by rotating the syringe clockwise, the locking mechanism of the present embodiment, it is also possible to lock by rotating the syringe around counterclockwise.

First, as shown in FIG. 22 (a), the cut portion A17, A17 of the flange A16 is in a posture such that the position in the right and left, is inserted into the flange receiving grooves A77 flanges A16 vertically.
At this time, since the dimension of the flange 16 d2 (see FIG. 17) is smaller than the dimension d3 between the arm portions A67, A67, arm portions A67, A67 without or pushed open especially flanges A16 is inserted into the groove A77 that.

Then, as shown in FIG. 22 (b), the syringe is moved down to the outer periphery of the flange A16 abuts the flat surface A63 of the locking mechanism A50. In the state of FIG. 22 (b), the center O2 of the syringe A10 is located several mm higher place than the center O1 of the flange receiving grooves A77.

In FIG. 22 (b), the but the contours of the guide rib A55 flanges A16 are depicted overlap somewhat, both structures are provided by shifting the position in the axial direction of the syringe (paper direction) because (see FIG. 18), they do not interfere with each other.

Then, rotating the entire syringe A10 clockwise as shown in FIG. 22 (c). From the state (0 °) of FIG. 22 (b), the flanges A16 is rotated by a first angle, the inner circumference leading end P1 of the arm portions A67 is raised abutment rides arc portion of the outer periphery of the flange A16.

In this state, the arm portion A67 is pushed open slightly outward elastically deformed. Thus, as indicated by the arrows B1, B2 in the figure (intended force including a downward component) substantially downward force on the flange A16 is applied. As a result, the outer periphery of the flange A16 (arc portion) is pressed against the flat surface A63.

The following describes the state of FIG. 23 (d) ~ (e). Incidentally, FIG. 23 (d), are depicted partially overlap and the outer periphery and the arm portion A67 of the flange A16 and in the step (e), in practice, the arm portion A67 is pushed open to the outside by a flange A16 .

From the state of FIG. 22 (c) toward the state of FIG. 23 (d), further clockwise rotation of the syringe A10. In this case, the flanges A16 is arc portion of the outer periphery thereof slides on the flat surface A63. Center of rotation of the syringe 10 is a point O2.

When the flange 16 is rotated to a second angle as shown in FIG. 23 (d), the tip of the right flange ribs A19 of the pair of flanges ribs A19 abuts on an upper surface A55a of the guide rib A55.

As is apparent from the above description, in this embodiment the "first angle", push the said arm portion by the outer peripheral and the arm portion of the flange (the biasing means) abuts, as a reaction force refers to the angle which substantially downward force begins to be applied to the flange. The "second angle", flange rib and the guide rib and the (engagement means) abuts means an angle begin to engage.

22 Again, with reference to FIG. 23, toward the state of FIG. 23 (d) from the state of FIG. 22 (c), the syringe is adapted to rotate about O2 point set at a position higher than the point O1 . Thus, no first (shown left) flange rib A19 hitting the guide ribs A55 when rotating the syringe clockwise. Syringe, first when rotated to the state of FIG. 23 (d), the last (right) flange rib A19 abuts the guide ribs A55.
According to this embodiment, only the last of the flange ribs A19 of the plurality of flange ribs abuts the guide rib A55, only click when the rib A19 is out of the guide A55 is adapted to obtain. Thus, the syringe is easy to verify that it has been securely locked, also by other ribs A19 from interfering with guide ribs A55, it is possible to prevent such the feel during rotation is deteriorated.

If is further rotated from the second angle, as shown in FIG. 23 (e), the tip of the flange rib A19 are moved to slide the upper surface A55a guide ribs A55, by guiding action at that time, the entire syringe A10 is temporarily lifted slightly above.

Then, as shown in FIG. 23 (f), to rotate the syringe from the first state to approximately 90 ° was rotated (third angle). Then, the leading end of the flange ribs A19 disengaged from the upper surface of the guide rib A55a, a pair of flanges ribs A19, A19 falls between a pair of guide ribs A55, A55. In this manner, (in this example, the center O2 of the syringe, the center O1 of the flange receiving groove A77 is substantially overlap) also falls to the lower position of the whole syringe, flanges A16 syringe is fixed to the lock mechanism A50.

In the state of FIG. 23 (f), the tip of each guide rib A19, A19 is in contact with the upper flat surface A63 of the locking mechanism. In the state of FIG. 23 (f), The tip P1 of the left and right arm portions A67 is in contact substantially equivalent to the outer periphery of the flange A16 (arc portion).

Two flanges ribs A19, A19 click feeling is obtained when the drops between the pair of guide ribs A55, A55. For this reason, the operator, it is possible to know whether the syringe has been securely locked.

Incidentally, the injection head A1 as shown in FIG. 24 may also be held on the movable stand A2 with relatively high. In this case, for example, in the sitting and working operator or shorty operator it was sometimes difficult to visually recognize the lock mechanism portion which syringe is mounted. In contrast, according to this embodiment, it is possible to know with click feel whether the syringe is securely locked, it is possible to reduce the occurrence of mounting errors of the syringe.

When removing the syringe 10 may be rotated syringe A10 in the state of FIG. 23 (f), is not particularly limited rotational direction. Rotating the syringe, it rides on the upper surface A55a one flange rib A19 is up auction an inclined surface A55b of the guide rib A55, thereby, the engagement between the pair of flange ribs A19, A19 and a pair of guide ribs A55, A55 It is released. Thereafter, by rotating the syringe A10 until flange A16 is vertically (see FIG. 22 (a)), can be removed from the groove A77 receives the flange A16.

Incidentally, the syringe after being secured to the locking mechanism A50 as shown in FIG. 23 (f), which may work at the tip of the syringe three-way stopcock and chemical tubes mounted is performed. So as not to come off the syringe by the rotational force applied to the syringe during this operation, the rotational force required to remove the syringe is preferably set to some extent elevated.

According to the locking mechanism of the present embodiment as described above, by utilizing the flange ribs formed on the flange of the syringe, insert the flange to the flange receiving groove in a simple operation of the whole syringe twisted 90 ° it is possible to carry out the fixing of the syringe. Also, when removing the syringe, it is very simple because it is possible to perform removal by simply twisting the syringe in a state of being fixed.

(Modification)
Type of syringe can be locked to the locking mechanism, as shown in FIG. 25, the flange ribs A119 near the cut portion A117 of the flange A116 is 3 or more (in this example this 5) be one that is formed it may be. Even in this case, it is preferable that only the last flange rib A119 of the plurality of flange ribs A119 is adapted to abut against the guide rib A55 (see FIG. 18).

Further, as shown in FIG. 26, a plurality of flanges ribs A119 on both sides of the flange A116 is formed, further, there the type of syringe has a notch A115, A115 and below the flange (arc portion) it may be. In the case of such a flange A116 may utilize a locking mechanism A250 as shown in FIG. 27.

Locking mechanism A250 of FIG. 27, the pawl on the left and right sides (A265a) with leaf spring A265 is provided in addition. The leaf spring A265, the upper end is held cantilevered on the distal end side of the arm portion A267, and extends out downward. The tip of the leaf spring A265 has a pawl A265a projecting radially inward.
The number of notches A115 as shown in FIG. 26 may be one or may be three or more. Position of the notches A115 is also not limited to the position shown in FIG. 26.

Insert the flange A116 flange received in the groove, and each pawl A265a rotated 90 ° in the groove, A265a engages the notch A115 flange. Further, like the above embodiments, the flange ribs A119 falls between a pair of guide ribs A255. Thus, flange A116 is fixed in flange receiving grooves.

Also, functions and the guide rib A55 described in the above embodiment, a function of pressing the flange into a substantially downward by the arm portion A67 is bent may have other members. Specifically, as schematically shown in FIG. 28, left and right ball plunger A301, A301 and two ball plungers bottom A303, A303 may have such a function.

Locking mechanism of Figure 28 A350, the ball plunger A301 is provided is formed into a substantially U-shape, slightly above a position near one of the arm portions as a whole in the same manner as in the above embodiment. The ball Blanc Ja A301 includes a cylindrical body spring inside is accommodated, and a sphere A301a provided at one end of the body. Spheres A301a is built so as not to come off from the body, and protrudes in a hemispherical shape from the end portion of the body. Pressing the spheres A301a toward the body, is contracted push spring in the body, the reaction force of the spring, through the spheres, so as to act on the flange (not shown) in contact with the sphere.

As can be imparted a substantially downward force to the flange, the ball Blanc Ja A301 has its sphere A301a side as shown in FIG. 28 are arranged slightly inclined so that the downward. These ball plunger A301, like the above embodiment, flange receiving syringe flange in the groove is in contact with the outer periphery of the flange when rotated from a first angle to a second angle, the urging force of the spring, flange the pressed substantially downward.

Next, two ball plungers provided in the bottom portion A303, A303 will be described. These ball plunger A303, A303 are provided at positions corresponding to the guide rib A55, A55 of the above embodiments. Each ball plunger, so that the sphere is the front side, are arranged in the thickness direction of the lock mechanism A350 (i.e., sphere is adapted to be displaced in the plane direction).

Thus even when provided with guide ribs A55, ball plunger A303 instead of A55, A303, similarly to the above embodiment, it is possible to obtain a click feeling. Click feeling is obtained when the pair of flanges ribs A19, A19 (e.g., see FIG. 17) falls between the pair of ball plungers A303, A303.

Incidentally, various structures described above are possible of course appropriate combinations, for example, guide ribs A55 of the first embodiment, A55 only (see FIG. 19), replacing the ball plunger A303,303 the bottom as shown in FIG. 28 it may be. Or, only arm A67 elastically deformed (see FIG. 19), it may be replaced by left and right ball plunger A301 as shown in FIG. 28.

[Other examples of the flange locking mechanism 2]
In the present invention, the sub-adapters as the mechanism for holding the cylinder flange of the cylinder member is not limited to those described above, can be employed a variety of configurations. For example, it is possible to apply a lock mechanism of the system as described below (mechanism adapter B300 holds the cylinder flange) to the configuration of FIG. In the example of FIG. 29 is depicted are different types of injection head and FIG. 1, the locking mechanism itself adapter B300 is provided the (detailed below), no problem in the configuration of the type shown in FIG. 1 is applied possible it is.

Injection head B110, as shown in FIG. 29, two syringes B200C, is intended to detachably attached the B200P, chromatic these syringes B200C, two recesses B114 for supporting the B200P, the upper surface of the head body B113 are doing. Syringe B200C, B200P respectively, a cylinder B210 of the cylinder flange B211 is formed at the end, and a piston B220 of the piston flange ends are formed.

Syringe B200C, B200P is mounted on the injection head B110 via the adapter B300. Adapter B300 is configured to hold a syringe B200C, the cylinder flange of B200P. Further, a part of the recess B114 injection head B110, the adapter receives b114a (corresponding to receiving unit 740 of FIG. 1) is formed an adapter receiving portion configured to receive the adapter B300. The details will be described later adapter B300.

Further, the injection head B110 is loaded syringe B200C, two piston drive mechanism driven independently from each other for operating the piston B220 of B200P B 130, are provided corresponding to each recess B 114. These piston drive mechanism B130 is loaded syringe B200C, operating piston B220 of B200P. Thus, the syringe B200C, a contrast agent and saline filled in the B200P, may be separately injected, or simultaneously to the subject. The piston driving mechanism B 130, may be a known mechanism need generally for this type of implanter.

Liquid injector B100, for example such as X-ray CT apparatus, is connected to the imaging diagnostic apparatus (not shown) for capturing a tomographic image of the subject, the liquid injector B100, the body conditions of the imaging region and a subject after injecting the liquid medicine in the set injection conditions according, it is possible to capture a tomographic image of the subject in the imaging diagnostic apparatus.

Next, adapter B300 described above, FIG. 30, with reference to FIG. 31 and the like will be described in detail.

Adapter B300 of the present embodiment is used when mounting the small-diameter syringe B200 than syringes which are normally mounted on the injection head B110 shown in FIG. 29. Adapter B300 includes a base member B310, fixed to the base member B310, and a flange lock member B320 for locking the cylinder flange B211, and is configured in a U-tube as a whole. In this embodiment, the base member B310 and the flange locking member B320 is composed of separate parts from each other, but they may be formed integrally in one piece.

The base member B310 has a substantially semi-cylindrical cylinder support portion B314 and the flange portion formed on its end. Cylinder support unit B314 supports the cylinder B210 syringe B200. Supporting unit B314 is the radius of curvature of the inner peripheral surface is formed to be substantially equal to the radius of curvature of the outer peripheral surface of the cylinder B 210. When mounting the adapter B300 injection head B 110, the cylinder support section B314 is positioned above the recess B114 injection head B 110.

Flange locking member B320 has a substantially arc-shaped arcuate portion formed on B321, a B-arm portion 322 extending as parallel to each other from both ends of the arcuate portion B321 so that the U-shaped as a whole. Each arm section B322, as it is possible to change the distance therebetween are elastically displaceably supported relative to arcuate portion B331. Therefore, fixation of the flange locking member B320 to the base member B310 has been made by arcuate portions B321 are fixed to the flange portion of the base member B310.

Arcuate portion B321 is inside of the inner peripheral surface B321a, and position the cylinder flange B211 of the cylinder B210, a cylinder B210 is formed dimensioned such that it can rotate about the axis in this state. The radius of curvature of the inner peripheral surface B321a of the arcuate portion B321 is greater than the radius of curvature of the cylinder support portion B314 of the base member B310. Such arcuate portion formed in a size B321 is by being fixed to the flange portion of the base member B310, a step is formed between the arcuate portion B311 of the base member B310 and the flange locking member B 320.

At both ends of the arm portion B 322, the knob portion B325, which is operated by a user are formed on the mounting and demounting of the adapter B300. Flange locking member B320 is arcuate portion B321, the arm portion B322 and the knob portion B 325, it is shaped to receive the inner cylinder flange B211 as a whole, together with the flange receiving surface B330, a flange receiving receiving a portion of the cylinder flange B211 Configure.

Here, the adapter B300 will be described cylinder flange B211 syringe B200 holding.

As shown in FIG. 32, the cylinder flange B211 formed at the end of the cylinder B210, when viewed in a direction perpendicular to the main surface, and a maximum length L1 and a minimum length L2. Orthogonal to the direction to take the minimum and direction length L2 having the maximum length L1.

Referring to Figure 31 again, the flange locking member B320 is a flange lock mechanism, a pair of lock claws disposed opposite on either side of the direction perpendicular to the direction in which the cylinder flange B211 is inserted in the receiving flange (horizontal direction) B 323 having. Locking pawl B323 is provided integrally with the arm portion B 322, and extends in such a symmetrical inwardly each other. Locking pawl B323, as shown in FIG. 33, has a base portion B323a, a pair of flange holding section B323b extending upward and downward while curving inwardly each separated from the base B323a bifurcated. Base B323b, B323b is a cylinder flange B211 is in the in-plane direction of the cylinder flange B211 in a state received in receiving flange previously described, is divided into two. The base B323a is fixed to the arm unit B 322, the flange holding section B323b is elastically displaceably supported relative to the base B232a. Distal ends of the flange pressing portion B323b is bent like a hook.

The distance D between the tip portions of the pair of locking claws B323 is greater than the minimum length L2 of the cylinder flange B211 for insertion of the cylinder flange B211 syringe held between the lock claw B323. And syringe B210 is to be able to sandwich the left and right sides of the cylinder flange B211 by the lock claw B323 when the posture as shown in FIG. 34, less than the maximum length L1 of the cylinder flange B211. Further, the spacing between the flange pressing portion B323b of each locking pawl B323, as shown in FIG. 34, the direction in which the cylinder flange B211 the direction of the maximum length L1 is rotated coincides with the opposing direction of the pair of locking claws B323 when it is, each part B323b is abutting against spacing flange B211. Each part B323b is a cylinder flange B211, sandwiching from above and below the insertion direction on both sides of the cylinder flange B211 to flange receiving.

By configuring as described above the locking pawl B 323, as shown in FIG. 33, in a posture such as the direction of the minimum length L2 of the cylinder flange B211 is substantially coincident with the opposite direction of the lock pawl B 323, the cylinder flange B211 it can be inserted from the direction having the maximum length L1 in the receiving flange. In this state, by rotating the syringe about its axis, the outer peripheral surface of the cylinder flange B211 contacts the respective flange pressing portion B323b, each flange pressing portion B323b is elastically displaced.

Was further rotated syringe, in the state shown in FIG. 34 rotated approximately 90 degrees from the orientation shown in FIG. 33, the cylinder flange B211 has two flange pressing portion B323b of the lock claw B323 at its maximum length L1 opposite ends by, it is sandwiched in the vertical direction. Accordingly, the posture of the cylinder flange B211 after rotation is maintained, is resiliently locked. Since the cylinder flange B211 is resiliently locked, the cylinder B210 further be rotated in the same direction or reverse direction, the lock is released.

Force to lock the syringe B200 by the lock claw B323, in connection work or the like of the extension tube B230 to subsequent syringe B200 (see FIG. 29) but the syringe B200 does not rotate to unlock the cylinder flange B211 by the lock claw B323 If the user rotates the syringe B200 in order, it is preferably set to force that can be rotated at an appropriate force.

Referring to FIG. 30, the base member B310 has two plate-like portion B315 formed beyond the flange locking member B320 in the width direction on both sides of the adapter B300. Each plate-like portion B315 is opposed to the flange receiving surface B330 at a sufficient distance to accommodate the cylinder flange B211 between the flange receiving surface B330. Likewise, each arm portion B322 of the flange locking member B320 also has two plate-like portion B328 so as to be positioned on both sides in the width direction of the adapter B300. These plate-like portion B328 also, to be able to accept the cylinder flange with the flange receiving surface B330, it is formed in a plate-like portion B315 and on substantially the same flat surface of the base member B310.

Next, using the adapter B300 described above will be explained the removable operation of the syringe 200 into the injection head 110.

Person, first, with the sides of the knob portion B325 of the adapter B300, attaching the adapter B300 to the adapter receiving b114a. Mounting adapter B300 to the adapter receiving B114a is by the arm portion B322 are elastically displaced inward by the engagement between the engaging claw B324 formed claw and arm portion B322 formed in the adapter receiving B114a It is made. This engagement adapter B300 is locked in the adapter receiving b114a.

After mounting of the adapter 300, the user mounts the syringe 200 to the adapter 300. Mounting of syringe 200 may be carried out as follows.

First, the user, as the cylinder flange B211 is received in the receiving flange described above, place the cylinder B210 on the cylinder supporting unit B 314, to position the cylinder flange B211 between the pair of locking claws B 323. At this time, as shown in FIG. 33, to insert the syringe B200 in a posture such as the direction of the minimum length L2 of the cylinder flange B211 is substantially parallel to the opposing direction of the lock pawl B 323. Thus, it is possible to insert the syringe B200 smoothly. Moreover, since the adapter B200 is frontage between the arm portion B322 of the syringe B200 is inserted is configured in a U-tube is wide overall, the insertion of the syringe B200 is easy.

After insertion of the syringe B200, user rotates the syringe B200 about its axis. At this time, since the cylinder B210 outer circumferential surface thereof is supported on the cylinder support unit B 314, the syringe B200 is rotated smoothly while maintaining its rotational center position.

Syringe flange B211 by rotation of the syringe B200 is in contact with the flange holding section B323b of the locking pawl B 323, to the flange pressing portion B323b elastically displaced. Further rotating the syringe B200, as shown in FIG. 34, the direction of maximum length L1 of the cylinder flange B211 is the opposite direction and becomes substantially parallel state of the lock pawl B 323. Then, the cylinder flange B211 its outer circumferential surface at both ends of the direction of the maximum length L1 is held to be sandwiched by the pair of locking claws B 323. Moreover, each of the locking pawl B323 comprises two flanges presser B323b are across the cylinder flange B211 from above and below, whereby the cylinder flange B211 is locked.

A pair of lock claws B323 for holding the cylinder flange B211 in the left and right both sides, the sandwiches the outer peripheral surface of the cylinder flange B211 in vertically symmetrical positions by the two flange pressing portion B323b respectively. Therefore, by syringe flange B211 is a posture shown in FIG. 34, the equilibrium of forces cylinder flange B211 receives from the horizontal direction and the vertical direction is maintained, the posture of the cylinder flange B211 after rotation is maintained. Therefore, when the cylinder flange B211 by rotation of the syringe B200 is a posture shown in FIG. 34, the holding of the syringe B200 by four flange pressing portion B323b which is resiliently supported gives click feel to the user. This click feeling, the user is, for example, the injection head B110 high position syringe B200
Even in situations where the lock can not be visually confirmed, it can reliably recognize that the syringe B200 is locked.

By syringe B200 is held in this way, the mounting of syringe 200 into the injection head B110 is completed.

In the embodiment described above has been described adapter B300 having a flange lock mechanism for supporting the outer peripheral surface of the cylinder flange B211 up and down four points of the right and left opposite sides, the flange lock mechanism is not limited to this, the cylinder flange B211 if configuration can be locked in a predetermined posture rotated in-plane direction may be adopted other configurations.
An example thereof will be described with reference to FIGS. 35 and 36. Incidentally, the flange locking mechanism shown in FIGS. 35 and 36 may be replaced with a flange locking mechanism of the adapter B300 described above. In the following description, FIG. 30, as obtained by replacing a flange lock mechanism in the adapter B300 shown in FIG. 31, the configuration except the flange lock mechanism 30 will be described with reference to the numerals used in FIG. 31.

Flange lock mechanism shown in FIG. 35 includes a pair of locking claws B423 which is opposed to the left and right sides of the cylinder flange B211 syringes are retained below the lock claw B423 in the midpoint of the opposite direction of the lock claw B423 (cylinder and a movable support member B440 arranged in the insertion direction side) of the flange B211.

Each lock pawl B423, like the embodiments described above, is provided on the arm portion B322 of the flange locking member B 320, a base B423a fixed to the arm portion B322, which is elastically displaceably supported relative to the base B423a and a flange holding section B423b. Flange holding section B432b may extend upward while curved inward, the tip portion is formed by bending in a hook shape.

Movable support member B440 is positioned at the bottom of the receiving flange described above has a flange lock member B320 and the flange receiving surface B330. Member B440 has an outer peripheral surface of the cylinder flange B211 which is inserted into the receiving flange at a position where the abutment, is movably supported in the insertion direction substantially parallel to the direction of the cylinder flange B211 to flange receiving. Further, the movable support member B440 is a predetermined biasing force, is urged in a direction (in the drawing the white arrow direction) to push the cylinder flange B211 from flange receiving. The urging force, upon insertion of the cylinder flange B211 to receiving flange is the degree to which pushed down toward the bottom of the receiving flange by the cylinder flange B211. The biasing of the movable support member B 440, can be used, for example a spring or the like (not shown).

Also in this embodiment, the syringe into the adapter holder can be performed in the same manner as embodiment described above. Specifically, the user first, the cylinder flange B211 is set to be the position shown in FIG. 35 to insert the syringe into the receiving flange. Then rotates the syringe about its axis. By rotation of the syringe, the maximum length direction of the cylinder flange B211 as shown in FIG. 36 is substantially parallel to the opposing direction of the lock claw B423, cylinder flange 211, the two flanges holding portion B423b and the movable support member B440 sandwiched from above and below is held.

When the cylinder flange B211 became position shown in FIG. 36, it is supported at a position where the left and right sides of the cylinder flange B21 is symmetrical with two flanges pressing portion B442b. The flange pressing portion B423b, the tip portion extending upward is bent in a hook shape while being curved inwardly. Thus, downward force acts on the cylinder flange B211 by the flange holding section B423b. On the other hand, the cylinder flange B211, an upward force is exerted by the movable support member B 440. Therefore, the cylinder flange B211 is when a posture shown in FIG. 36, the posture of the cylinder flange B211 is stable, the syringe is locked with a click feeling. Removing the lock syringe is similar to the embodiment described above.

As described above, the upper left and right sides of the cylinder flange B211, and also by supported at three points from below, it is possible to hold the syringe stably.

Figure 30, in the embodiment shown in FIG. 31, showing the adapter B300 for small diameter syringe with a semi-cylindrical cylinder supporting unit B 314. However, a syringe held, if the recess B114 injection head B110 has a cylinder diameter corresponding the syringe to be placed directly on the recess B114, cylinder support unit is unnecessary.

Figure 37 is a view seen from the front end side of the adapter mentioned above. The adapter B300 as shown in the figure, a plurality of magnets B351a ~ B351d may be provided as an adapter identification member.

[Other examples of the flange locking mechanism 3]
Syringe holding structure C50 in FIG. 38 is provided with adapter case C40 that is formed in a substantially tubular overall, and a syringe retaining member C50 for holding the flange part C46 of the case C40.

Adapter case C40 is intended for attaching a small diameter syringe C80 (see FIG. 39) in the syringe retaining member C50. The small diameter of the syringe C80, as shown in FIG. 39, similar general syringe, a cylindrical cylinder member C81 of liquid medicine is filled, slidably inserted piston member to the cylinder member (not shown) ,have. The base end portion of the cylinder member C81, contour flange C86 polygonal (octagonal in this example) is formed.

Figure 40, as shown in FIG. 41, adapter case C40 is formed in a substantially tubular overall a resin molded article as an example. The adapter case C40 includes a cylindrical portion C41 of the cylinder member C81 of the syringe C80 (see FIG. 39) is inserted and a flange portion C46 formed at an axial end of the cylindrical portion C41.

The contour of the flange portion C46 is substantially circular as a whole, the left and right sides longitudinal cuts C47, C47 are formed. The upper and lower flanges portions C46 (arc portion), notches C45, C45 are formed one by one.

As shown in FIG. 40, on the back of the flange portion C46, ​​the flange C86 recess (see FIG. 39) is fitted C43 of the small diameter of the syringe C80 are formed. The recess C43 is dug in the thickness direction of the flange portion C46, ​​the contour shape of the C recess 43 has a octagonal in correspondence to the contour shape of C flange 86. Flange C86 of the syringe C80 is by fitted into the recess C43, with respect to the circumferential direction, the position of the syringe C80 and adapter case C40 is fixed (i.e., a state in which the syringe C80 does not rotate relative to the case C40).

As shown in FIG. 40, the left and right sides of the flange portion C46 longitudinal grooves C49, C49 are formed one by one. The longitudinal groove C49 is dug by a predetermined depth in the thickness direction of the flange portion from the rear surface of the flange portion C46. By the longitudinal grooves C49, C49 are formed, as described later, the flange portion C46 does not interfere with the pair of ribs C55, C55 when inserting the flange part C46 in the flange receiving grooves C77 (see FIG. 42) It has become way.

Figure 42 is a perspective view showing a syringe retaining member C50. Figure 43 is a front view thereof. Figure 42, as shown in FIG. 43, the syringe retaining member C50 as a whole is formed in a substantially U-shape has a flange receiving grooves C77 of the substantially U-shaped to retain the flange portion C46 of the adapter case C40 ing.

As shown in FIG. 42, the syringe retaining member C50, specifically, constitutes a curved portion of the lower half of the U-shaped (more precisely, constitutes a deeper side substantially half of the thickness direction of the lower half to) the base member C51 of the arc-shaped, and a movable member C61 of the U-shape attached to the front side so as to overlap in this member C51.

Both members are screwed at the movable member two screw holes C68 provided at the lower portion of the C61, C68 (one example) are fixed to each other. Movable member C61 includes roughly includes a fixed portion C61A occupying a certain range around the two screw holes C68, and the pair of arm portions from both sides extend out above the fixing portion C61A C67, C67 . A pair of arm portions C67, C67 are configured to shrink enlarged flexed elastically. For example, by the tips of the arms C67, C67 closer together by pinching with fingers, the arm portion C67, C67 is elastically deformed inwardly. To restore to the original shape by releasing the finger.

The leading ends of the arm portions C67 is provided with a claw plate spring C65, the pawl plate spring C65 its upper end is supported like a cantilever, which extends out downward. The distal end portion of the leaf spring C65, nail C65a projecting radially inward is formed. The pair of claws C65a, 65a engages the notch C45, C45 of the flange portion C46 of the adapter case C40 (see FIG. 40). Thus, it is possible to fix the flange portion C46 to the flange receiving grooves C77 (details below) within.

The upper end of each arm portion C67, the guide portion C66 spread gently upward the flange portion so as to be easily guided to the groove is formed. In particular, in the present embodiment, since the guide portion C66 is formed sufficiently large in the thickness direction (front rear direction) and the transverse flange portion easily put flange portion in the groove.

As shown in FIG. 42, the flange receiving groove C77 is formed on the inner side of the pair of arm portions C67, C67 and the fixed portion C61A. In Figure 42, the only surface of the back side of the flange receiving groove C77 is present, the configuration side of the front side is not present is depicted. Here, the side surface of the front side is provided in advance plane to the injection head side may be a (not shown), the surface of the injection head side, and jointly with the inner surface of such a movable member of Figure 42, overall it may be adapted to configure a substantially U-shaped flange receiving grooves 77 of the cross-section concave.

As shown in FIG. 42, a flange receiving the groove C77, a pair of ribs C55, C55 slightly inside the intermediate vicinity of each arm portion C67 is formed. Each rib C55 is extended out so as to project to the front side from the back side surface of the flange receiving groove C77. Each rib C55 is shaped so that the amount of protrusion toward the lower side becomes larger. In this example, the contour C55a rib C55 is a quarter circle arc. Lower ribs C55 has a substantially horizontal straight portion C55b.

As shown in FIG. 44 (plan view), by such ribs C55, C55 are formed, the thickness of the flange receiving grooves C77 of the part of the rib, i.e. the gap d77 flange enters partially narrows going on. The dimensions of the gap d77 is smaller than the thickness of the flange portion of the adapter case C40 C46 (see FIG. 40). Thus, the flange portion C46 is adapted to not be inserted into flange receiving groove C77 only in a predetermined orientation.

Next, the procedure of placing the adapter case in the syringe holding structure of the present embodiment configured as described above will be described. Although reference also FIGS. 46 to 48 in the following description, in these figures, the illustration of the syringe in the adapter casing C40 are omitted.

First sets small-diameter syringe C80 to adapter case C40 as shown in FIG. 39. Flange C86 of the syringe C80 is by fitted into the recess C43 in the adapter case C40, the circumferential direction, the position of the syringe C80 and adapter case C40 is fixed. Note that according to this arrangement, special parts for fixing the position of the syringe C80 and adapter case C40 in the circumferential direction is advantageous in that it is not necessary.

Then, the syringe C80 in the state it was set to adapter case C40, attached to the syringe retaining member C50. Specifically, first, as shown in FIG. 46, with the adapter case C40 in a posture as vertical groove C49, C49 of the flange portion C46 of the case C40 is vertical. Then it, as shown in FIG. 38, inserting the flange portion C46 of the case in the receiving groove C77 of the syringe retaining member C50.

At this time, the pair of ribs of the syringe retaining member C50 C55, C55 (see FIG. 40), since so through the vertical grooves C49, the C49, without the flange portion C46 and the rib C55 interfere, receiving a flange portion C46 can be inserted into the groove C77.

In a state where the flange portion C46 is inserted into the receiving groove C77 (see FIG. 47), the tip of each rib C55, C55 comes in contact with the rear surface of the flange C86 of the syringe C80. Thus, the axial position of the syringe C80 for adapter case C40 is fixed. According to such a configuration, special parts for fixing the position of the syringe C80 and adapter case C40 with respect to the axial direction is advantageous in that it is not necessary.

Incidentally, the ribs C55 as long serve to fix the axial position of the adapter case C40 as mentioned above are possible various changes may be a projection of another shape not for example rib. Further, the syringe C80 need not rib tip is fully in contact with the rear flange portion in a state of being attached to the syringe retaining member C50. Completely even if not in contact, because the axial position of the substantially adapter case C40 is fixed.

Then, once inserted into the groove C77 receives the flange portion C46 of the case, (90 ° in this example) which is to rotate the syringe in clockwise or counterclockwise as shown in FIG. 48. Thus, two notches of the outer periphery of the flange portion C46 C45, C45 to nail plate spring C65a, C65a engages, the flange portion C46 is fixed to the syringe retaining member (referred fixed with respect to the circumferential direction).

After the liquid injector, when removing the adapter case C40 from the syringe retaining member C50 is, 90 ° rotation case C40 clockwise or counter-clockwise. Thereby, the pawl is disengaged, can be removed flange portions C46 flange receiving from the groove C77.

Incidentally, adapter case C40 is in a state mounted on the syringe retaining member C50, 2 pieces of longitudinal grooves C49, C49 of the flange portion back of the case becomes horizontal. As a result, even if an attempt to remove the adapter case C40 flange portion C46 lifted upwardly from the flange receiving grooves C77 in this state, (the inner circumference of the recessed groove 43) ribs C55, C55 lower inner flange portion C46 of since the interference to, it is not possible to remove the flange portion C46.

According to the present embodiment as described above, it is of a type syringe C80 that are not notch formed in the flange outer periphery a contour shape of the flange C86 is octagonal (an example) as shown in FIG. 39, it can be mounted the syringe C80 to the syringe retaining member C50 via the adapter case C40. Moreover, the mounting method is very simple as rotated by 90 ° by putting a flange portion C46 of the adapter case C40 in the flange receiving grooves C77.

Also, when wearing the syringe C80, so the axial position of the pair of ribs C55, C55 are adapter case C40 in contact with the rear flange C86 of the syringe C80 and the syringe C80 of the syringe retaining member C50 is fixed there. Thus, special parts for fixing the axial position of the syringe C80 and adapter case C40 is not necessary.

In a state where the adapter case C40 is mounted on the syringe retaining member C50, longitudinal grooves C49 becomes horizontal, the flange portion C46 from the syringe retaining member C50 pair of ribs C55, C55 interferes with the inner flange portion C46 so as not be removed. Therefore, it is also possible to prevent the syringe during liquid injection deviates. In particular, the ribs C55, C55, as described above, and also provide the ability to fix the axial position of the syringe C80 relative to the case C40, that to have a plurality of functions Thus the rib C55, C55, syringe retaining member simplification of the structure of C50 is attained.

The present invention is not limited to the above embodiment. For example, after inserting the flange portion C46 flange received in the groove C77, the flange portion C46 by rotated by a predetermined angle other than 90 ° it may be adapted to be secured in a flange receiving groove C77.

The locking means for securing the flange portion C46 in the flange receiving grooves C77, not only the pair of pawl plate spring C65, C65, as shown in FIG. 42, it is possible to use other various mechanisms.

Available various things as a syringe to be inserted into the adapter casing C40, for example, the syringe C180 shown in FIG. 49, the rod-less piston member C182 is inserted slidably into the cylinder member. This on the back of the piston member C182, locking projection C182a is formed to be gripped by the gripping portions of the piston drive mechanism (not shown). The syringe C180 is similar the embodiment, the contour of the flange C186 cylinder member is formed in octagon (an example). As shown in FIG. 50, similar to the above embodiment, in the state in which case C40 is held the syringe retaining member C50, flange tip of the syringe C180 rib syringe retaining member C50 C55, C55 (which only one shown) C186 It comes into contact with the back of the.

1 liquid injector 110 injector head 114 adapter holder unit 200 syringe 210 cylinder member 211 cylinder flange 212a recess 220 piston member 300, 400 sub-adapter 310 base member 320 flange lock member 322 arm portion 323 locking claw 323a projecting portions 351a ~ 351d identification member 414 cylinder support portion 423 locking pawl 700 syringe retaining structure 701 mains adapter 723 flange portion 730 syringe supporting portion 740 adapter receiving portion 717 guide groove 846 proximity sensors 847 adapter identification member

Claims (10)

  1. A main adapter to be mounted on injection head holding a syringe having a cylinder member and a piston member,
    A sub adapters said is detachably mounted to a portion of the main adapter, holding the cylinder flange formed on the cylinder member,
    A syringe holding structure comprising,
    The sub-adapter,
    A flange receiving for receiving said cylinder flange,
    By the syringe is rotated a predetermined angle about its axis in a state in which the cylinder flange is received in receiving the flange, the flange lock mechanism for locking the cylinder flange,
    An adapter locking mechanism for locking the sub-adapter to the main adapter,
    In a state in which the cylinder flange is locked by the flange lock mechanism, and release prohibition mechanism for prohibiting the locking by the adapter fixing mechanism is released,
    And a syringe retaining structure.
  2. The sub-adapter is U-shaped as a whole, the syringe holding structure according to claim 1.
  3. Wherein the main adapter, the adapter receiving portion into which the sub-adapter is mounted are formed,
    Said adapter fixed structure,
    A locking pawl provided on one side or the adapter receiving portion of said sub-adapters,
    A locking portion for the locking pawl provided on the other side or the adapter receiving portion of said sub-adapter are engaged,
    The a, syringe holding structure according to claim 1 or 2.
  4. The flange received is,
    Approximately equal arcuate portion radius of curvature of the outer peripheral surface of the radius of curvature of the inner peripheral surface of said cylinder flange,
    An arm portion provided in the movable against the arcuate portion extending from both ends of the arc-shaped portion,
    Anda knob portion formed on the arm portion,
    Inner part of the peripheral surface is formed on the extension of the arc shape of the inner peripheral surface of the arcuate portion, the syringe holding structure according to any one of claims 1 to 3 wherein the knob.
  5. The sub-adapters, further
    Having a stopper structure for regulating the amount of displacement of the inward of the arm portions,
    Syringe holding structure according to any one of claims 1-4.
  6. The main adapter has a cylinder support for supporting a portion of said cylinder member,
    The distal end side of the cylinder member of a syringe in a state mounted on the main adapter are configured so as to protrude from the front end portion of the main adapter, syringe holding structure according to any one of claims 1 to 5.
  7. A syringe holding structure according to any one of claims 1 to 6,
    An injection head to which it is attached,
    Liquid injector comprising a.
  8. Wherein the sub-adapter, the identification member is used to identify the type of the adapter is provided,
    further,
    Comprising a detector for detecting the identification member, liquid injector according to claim 7.
  9. It said detector is a proximity sensor, liquid injector according to claim 8.
  10. The proximity sensor is a sensor for detecting a metal in a non-contact as the detection medium an alternating magnetic field,
    Wherein the identification member comprises a metal to be detected by the detection sensor, liquid injector according to claim 9.
PCT/JP2011/056385 2010-04-16 2011-03-17 Syringe holding structure WO2011129175A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010-094957 2010-04-16
JP2010094957 2010-04-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012510604A JP5878115B2 (en) 2010-04-16 2011-03-17 Syringe holding structure

Publications (1)

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WO2011129175A1 true WO2011129175A1 (en) 2011-10-20

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WO (1) WO2011129175A1 (en)

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JP2015217176A (en) * 2014-05-19 2015-12-07 株式会社根本杏林堂 Chemical feeder
WO2017110590A1 (en) * 2015-12-24 2017-06-29 パナソニックヘルスケアホールディングス株式会社 Drug infusion device, cartridge adapter, and drug infusion system
US10286152B2 (en) 2012-09-28 2019-05-14 Bayer Healthcare Llc Quick release plunger

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JP2007252481A (en) * 2006-03-22 2007-10-04 Nemoto Kyorindo:Kk Liquid medicine injection system

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JP2005000203A (en) * 2003-06-09 2005-01-06 Nemoto Kyorindo:Kk Liquid medication injection system
WO2007116864A1 (en) * 2006-04-05 2007-10-18 Nemoto Kyorindo Co., Ltd. Medicinal-liquid injection system
JP2008211785A (en) * 2007-02-03 2008-09-11 Azuma Systems:Kk Detecting device and detecting method

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JP2007157362A (en) * 2005-11-30 2007-06-21 Sunx Ltd Detection sensor
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10286152B2 (en) 2012-09-28 2019-05-14 Bayer Healthcare Llc Quick release plunger
JP2015217176A (en) * 2014-05-19 2015-12-07 株式会社根本杏林堂 Chemical feeder
WO2017110590A1 (en) * 2015-12-24 2017-06-29 パナソニックヘルスケアホールディングス株式会社 Drug infusion device, cartridge adapter, and drug infusion system
JPWO2017110590A1 (en) * 2015-12-24 2018-09-06 Phcホールディングス株式会社 Drug infusion devices, the cartridge adapter and drug infusion system
EP3395385A4 (en) * 2015-12-24 2019-05-08 PHC Holdings Corporation Drug infusion device, cartridge adapter, and drug infusion system

Also Published As

Publication number Publication date
JP5878115B2 (en) 2016-03-08
JPWO2011129175A1 (en) 2013-07-11

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