JP2001269404A - Flange coupling implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flange coupling implement for mounting a syringe at an injection head. SOLUTION: The flange coupling implement comprises a base part 202 at the other end side of a body 201, a flange support 203 for supporting the flange of the syringe from a rear end side and an outside face side, and a pair of sandwiching members 204, 205 for sandwiching a body by supporting the flange side together with the support 203 by covering the flange from the front end side of the syringe and to sandwich the body along an outer peripheral surface of the body of the flange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary device for fixing a syringe, and more particularly to a medical device.
The present invention relates to a structure of a syringe fixing auxiliary device for attaching a syringe filled with a contrast agent to an injection head.

[0002]

2. Description of the Related Art In recent years, various medical devices have been developed as devices for examining the functions of the human body. One of them is angio using high-speed scan CT for diagnosing the circulatory function of the human body. This C
In angio using T, the function of the circulatory organ is diagnosed by injecting a contrast agent into a patient and diagnosing the contrast agent injected into the patient's body using CT.

In order to inject a contrast medium into a human body, generally, an injection head 10 shown in FIG.
Is used. A syringe 300 filled with a contrast agent in advance is attached to the injection head 10, and a piston 300 d in the syringe 300 is moved to FIG.
As shown in (1), the syringe 300 is gradually moved to the distal end side using the plunger 11 provided in the injection head 10. Thus, the contrast medium is injected into the body by the tube 301 and the catheter or the winged needle (not shown) attached to the distal end of the syringe 300.

Here, the structure of the syringe 300 will be described with reference to FIG. The syringe 300 has a cylindrical shape, and an internal space defined by the piston 300d is filled with a contrast agent. At the tip of the syringe 300, a spout 300a having a tapered tip is provided. The rear end of the syringe 300 has a flange 300b
And two convex portions 300c for engaging with the injection head 10 are provided at opposing positions.

[0005] A plunger 11 provided on the injection head 10 is provided on the back side of the piston 300d.
A connecting portion 300f for connecting to an oval-shaped connecting portion provided at the distal end of is provided at a position rotated by 90 ° with respect to the convex portion 300c so as to face each other.

Next, the mounting of the syringe 300 on the injection head 10 will be described with reference to FIGS.

First, as shown in FIG. 14, the injection head 10 is provided with an opening 12 having an inner peripheral surface 14. This inner peripheral surface 14 has a syringe 300
The protrusions 13 for engaging with the protrusions 300c provided at the positions are formed at positions facing each other.

The opening 12 is provided with a plunger 11 which is connected to the piston 300d of the syringe 300 and moves the piston 300d toward the distal end of the syringe 300.

At the tip of the plunger 11, a neck smaller than the diameter of the plunger 11 is connected to the neck,
A connecting portion is formed in which the curved portion includes the main body of the plunger 11 and an oval-shaped head 11a having the same radius of curvature.

In the injection head 10 having such a configuration, first, as shown in FIG. 14, the protrusion 1 provided in the opening 12 of the injection head 10 is provided.
3 so that the protrusion 300c provided on the syringe 300 is located in the recess formed by the syringe 30.
0 is inserted into the opening 12 of the injection head 10.

Thereafter, as shown in FIG.
The syringe 300 is rotated by about 90 degrees.
Is located on the rear side of the projection 13 provided in the opening 12 and the syringe 300
The projection 300 of the opening 12 is engaged by the flange 300b and the projection 300c provided on the injection head 10, and the syringe 300 is fixed to the injection head 10.

At this time, the head 11a provided on the plunger 11 is also connected to the connecting portion 300f provided by the piston 300d at the same time when the syringe 300 rotates.

[0013]

However, FIG.
According to the structure of the injection head 10 shown in FIG. 15, only the syringe 300 having the structure shown in FIG. 13 can be mounted. On the other hand, in the market, many syringes having the structure shown in FIG. 16 are commercially available in addition to the syringe shown in FIG.

The syringe 2 shown in FIG. 16 has a cylindrical body 6, a spout 7 for discharging a contrast agent is provided at the front end, and a spout 7 is provided at the rear end. And a flange portion 5 forming an opening. A piston 3 having a female screw 3a is provided at the rear end side of the syringe 2 inside the body part 6, and an internal space defined by the piston 3 is filled with a contrast agent 4.

Therefore, if the syringe shown in FIG. 16 can be mounted on the injection head 10 shown in FIGS. 14 and 15, two types of syringes can be selected at the medical site. And the convenience of medical personnel can be improved.

An object of the present invention is to solve the above-mentioned problem. Even if a syringe having a shape shown in FIG. 16 is used, it can be attached to an injection head shown in FIG. It is to provide auxiliary equipment.

[0017]

The present application is a divisional application of Japanese Patent Application No. 282129/2007 (hereinafter referred to as a parent application), which focuses on the structure of a flange connecting device disclosed in the parent application. It is.

As a preferred example of the provision of the flange connecting device, as shown in the following embodiment, it is preferable that the flange connecting device is provided in a syringe adapter as an adapter. It is also possible to apply the structure of the flange connection device of the present application to a structure having a different structure.

In the flange connecting device according to the present invention, a cylindrical main body having a flange portion at one end side;
A piston which is accommodated in the main body so as to be movable in the axial direction, and the flange portion side of the syringe,
A flange connecting device for connecting to an injection head, comprising a syringe fixing means for sandwiching and fixing the flange side of the syringe along a plane intersecting the axial direction. In the flange connection device, preferably, the syringe fixing means includes a flange receiving portion that supports the rear end side and the outer surface side of the flange portion of the syringe, and the flange portion of the syringe, the front end of the syringe. By covering from the side, the flange portion is supported together with the flange receiving portion, and, in a plane intersecting with the axial direction, such that the main body portion is sandwiched along the outer peripheral surface of the main body portion of the syringe. And a pair of holding members for holding the main body.

By adopting this configuration, the syringe is securely fixed by the syringe fixing means.

According to the syringe fixing aid according to the present invention, there is provided a cylindrical main body, a spout on the front end side, and a flange forming an opening on the rear end side. Inside the main body, in an internal space defined by a piston having a coupling portion on the flange portion side, a syringe sealing a liquid agent is provided with an opening having an inner peripheral surface on which an engagement convex portion is formed. At the opening, the piston inside the syringe is moved to the tip side of the syringe, and the liquid inside the syringe is poured out from the spout. A syringe fixing auxiliary device for fixing to an injection head provided with a plunger having a connecting portion including a connected portion and a substantially oval-shaped head having a curved portion having the same radius of curvature as the main body portion, comprising: The flange portion includes a flange fixing device for fixing the injection head, and a piston connecting device for connecting the piston to the plunger.

Thus, even with a syringe having the above-described shape that cannot be directly connected to the injection head having the above-described opening, the above-described injection head can be formed by using the flange fixing device and the piston connecting device. And the syringe.

As a result, two types of syringes having different shapes can be attached to one injection head, so that it is possible to improve the convenience of doctors and nurses at medical sites.

[0024] Preferably, the flange fixing device is engaged with a cylindrical body portion, and at one end side of the body portion, is engaged with an engagement projection provided on an inner peripheral surface of an opening of an injection head. A projection fixing portion for fixing the flange fixing device itself to the injection head, and a syringe fixing portion for fixing the flange portion side of the syringe at the other end of the body portion.

Thus, the projection is securely engaged with the engagement projection provided on the inner peripheral surface of the opening of the injection head, and the flange fixing device itself is securely fixed to the injection head. Becomes possible.
Further, in the syringe fixing portion, the flange portion of the syringe can be securely fixed.

More preferably, the syringe fixing portion includes a flange receiving portion that supports the rear end side and the outer surface side of the flange portion of the syringe, and a flange portion that covers the front end side of the syringe. A pair of holding members for holding the main body so as to support the main body along the outer peripheral surface of the main body of the syringe.

Thus, the syringe is more securely fixed in the syringe fixing portion, and the reliability of the syringe fixing auxiliary device can be improved.

Also, preferably, the piston connecting device is
On one end side, there is provided a connected portion to be connected to the connecting portion of the piston, and on the other end side, a connection receiving portion for receiving and fixing the connecting portion provided at the tip of the plunger.

Thus, the piston of the syringe is securely fixed to the plunger, and the movement of the plunger can be reliably transmitted to the piston.

Preferably, the connection receiving portion has a substantially cylindrical core member having the same radius of curvature as the curved portion of the plunger head, and a cylindrical turn rotatable along the outer peripheral surface of the core member. Moving member, and has a substantially oval window having the same shape as the head, which can receive the head of the connecting portion of the plunger at one end of the rotating member. Has a groove capable of receiving the head, and after aligning the window with the groove, the head of the plunger is inserted, and the rotating member is rotated by about 90 ° so that the head of the plunger is grooved. It is fixed to.

Thus, the plunger and the piston connecting device are more reliably connected, and the reliability of the syringe fixing auxiliary device can be improved.

Further, according to the syringe fixing aid according to the present invention, the cylindrical main body having the flange on one end side and the piston accommodated in the main body so as to be movable in the axial direction are provided. A syringe fixing auxiliary device for fixing a syringe provided to an injector head having a plunger for moving a piston, wherein a flange connection device for connecting a flange portion side of the syringe to the injection head, a flange connection A piston connection device provided independently of the device for connecting the piston to the plunger.

Thus, the injection head has
Even with a syringe having the above-mentioned shape that cannot be directly connected, it is possible to connect the above-described injection head and the syringe by using the flange fixing device and the piston connecting device.

As a result, two types of syringes having different shapes can be attached to one injection head, so that it is possible to improve the convenience of doctors and nurses at medical sites.

[0035] Preferably, the flange connecting device further comprises a head connecting means connected to an injection head, and a syringe fixing means for sandwiching and fixing the flange side of the syringe along a plane intersecting the axial direction. And a piston coupling device having piston coupling means for coupling to the piston and plunger coupling means for coupling to the plunger of the injector head.

According to the above configuration, the syringe can be securely fixed to the injection head.

[0037] Preferably, the flange fixing device comprises:
The head fixing means has a cylindrical body portion, and at one end side of the body portion, engages with an engagement projection provided on the inner peripheral surface of the opening of the injection head, and fixes the flange fixing device itself to the injection head. The syringe fixing means includes a syringe fixing portion provided on the other end side of the body portion.

[0038] Thereby, the projection is securely engaged with the engagement projection provided on the inner peripheral surface of the opening of the injection head, and the flange fixing device itself is securely fixed to the injection head side. Becomes possible.
Further, in the syringe fixing portion, the flange portion of the syringe can be securely fixed.

Preferably, the syringe fixing portion comprises a flange receiving portion for supporting the flange portion of the syringe from the rear end side and the outer surface side, and a flange portion of the syringe which is covered from the front end side of the syringe. And a pair of holding members for holding the body in such a manner as to hold the body along the outer peripheral surface of the body of the syringe in a plane intersecting with the axial direction. Have.

Thus, the syringe can be more securely fixed at the syringe fixing portion, and the reliability of the syringe fixing auxiliary device can be improved.

Preferably, the piston connecting means includes a substantially cylindrical core member having the same radius of curvature as the curved portion of the head of the plunger, and a cylindrical turn rotatable along the outer peripheral surface of the core member. A moving member, and at one end of the rotating member, a window provided at a connecting portion of the plunger and capable of receiving a head, and at one end of the core member, a groove capable of receiving the head. After the window portion and the groove portion are aligned, the head portion of the plunger is fixed to the groove portion by inserting the head portion of the plunger and rotating the rotating member by about 90 °.

Accordingly, the plunger and the piston connecting device are more reliably connected, and the reliability of the syringe fixing auxiliary device can be improved.

[0043]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an auxiliary device for fixing a syringe according to the present invention. Note that the shape of the injection head 10 and the shape of the syringe 2 are the same as those in the related art, and a description thereof will be omitted.

First, referring to FIG. 1, an outline of a syringe fixing auxiliary device 1 in the present embodiment will be described with reference to an overall perspective view.

The auxiliary device 1 for fixing a syringe has a piston adapter 100 for connecting the piston 3 of the syringe 2 to the plunger 11 of the injection head 10.
And a syringe adapter 200 for fixing the flange 5 side of the syringe 2 to the injection head 10.

Here, the structure of the piston adapter 100 will be described first with reference to FIG. The piston adapter 100 includes a rotating member 101 and the rotating member 1.
01, a core member 102 rotatably housed in
A male screw member 103 fixed to the core member 102 is provided.

The rotating member 101 has a cylindrical shape, and one end thereof has a head 1 provided at a connecting portion of the plunger 11.
An oval window 101b having the same shape as the head 11a is provided so as to receive the head 1a (see FIG. 14). Also,
An opening window 101e is formed at the other end of the rotating member 101 so that the core member 102 can be inserted.

Further, a pair of elongated grooves 101c are formed at opposing positions on the outer peripheral surface of the rotating member 101, and circular grooves 101d are provided at both ends of the elongated grooves 101c.

Next, the core member 102 is formed of a cylindrical body 1.
02a, the head 11 of the plunger 11 described above.
An oval-shaped groove 102b having the same shape as that of FIG.
Further, the body portion 102a has a pin hole 1 for receiving the pin 102e in the same direction as the direction in which the groove portion 102b extends.
02i, a ball hole 102d for inserting the ball 102f, the spring 102g and the set screw 102h along a direction orthogonal to the pin hole 102i, and a screw hole 102c for fixing the screw member 103 using the small screw 103c. Is provided.

When the core member 102 is housed in the rotating member 101, both ends of the pin 102 are elongated grooves 101c.
So that the elongated groove 101c is guided by the pin 102e, so that the rotating member 101 can rotate 90 ° clockwise or counterclockwise along the outer peripheral surface of the core member 102. Also, the ball 102f has a circular groove 101d.
The rotation member 101 is provided so as to fit into the
Is rotated by 90 ° and fits into the circular groove 101d, thereby preventing rotation of the rotating member 101 due to vibration or the like and giving a click feeling.

The male screw member 103 includes a disk portion 103a,
The syringe 2 has a male screw portion 103b that is screwed into a female screw hole 3a provided in the piston 3 of the syringe 2. Male thread member 10
3 is fixed to the core member 102 through the small screw 103c through the screw hole 103d and the spacer 104 interposed therebetween. Note that the male screw member 103 is
It is desirable to be formed integrally with.

Next, a connection state between the plunger 11 and the piston 3 by the piston adapter 100 will be described with reference to FIGS.

First, as shown in FIG. 3, the screw portion 103b of the piston adapter 100 is screwed into the female screw portion 3a provided on the piston 3.

On the other hand, the window 101b of the rotating member 101,
The coupling window 100 is aligned with the groove 102b of the core member 102.
Form A.

Next, referring to FIG. 4, the head 11a of the plunger 11 is inserted into the coupling window 100A, and the rotating member 101 of the piston adapter 100 is moved about 9 degrees in the direction indicated by the arrow in the figure.
Rotate 0 °. Thereby, the head 1 of the plunger 11
1a will be connected to the piston adapter 100.

Next, the structure of the syringe adapter 200 will be described with reference to FIG. The syringe adapter 200 has a body 201 having an opening 201a. At one end of the body 201, the syringe adapter 200 is engaged with the engagement protrusion 13 (see FIG. 14) provided on the inner peripheral surface 14 of the opening 12 of the injection head 11. A pair of protrusions 217 and 218 for fixing are provided at positions facing each other along the peripheral surface of the body 201.

At the other end of the body 201,
By covering the base part 202, the flange part 5 (see FIG. 1) of the syringe 2 from the rear end side and the outer side, and the flange part 5 from the front end side of the syringe 2, A pair of holding members 204 and 205 are provided to support the flange portion 5 together with the flange receiving portion 203 and to hold the main body portion along the outer peripheral surface of the main body portion of the syringe 2 so as to hold the main body portion. I have.

On the side of the fixing holes 204a, 205a provided at one ends of the holding members 204, 205, screw holes 202 provided in the base 202 so as to be rotatable, respectively.
c, 202d, screws 206 and washers 207
And is fixed to the body 201.

The holding members 204 and 205 have elongated holes 204b and 205b for restricting the open state of the holding members 204 and 205, respectively.
A screw 206 and a washer 207 are provided near a portion 205a and are screwed using screw holes 202a and 202b provided in a base portion 202.

Further, on the other end side of the holding members 204 and 205, a first lever 210 for generating a holding force for holding the main body of the syringe 2 by the holding members 204 and 205 is provided. The pinhole 210 a provided in the first lever 210 allows the holding member 2
05 is rotatably attached to the other end using a pin 214 and a wheel stopper 208. Similarly, the second lever 2
11 is a pin hole 21 provided in the second lever 211.
1b, it is rotatably attached to the other end of the holding member 204 using a pin 213 and a wheel stopper (not shown).

The first lever 210 and the second lever 211 are rotatably connected using a pin hole 210b provided in the first lever 210, a pin 211a, and a wheel stopper 208. Further, a spring 219 is fitted to the pin 214 of the holding member 205 so that the holding members 204 and 205 are always opened to the maximum extent when the holding members 204 and 205 are not locked. ing.

Further, a screw hole 202e provided in the base portion 202 is provided at a contact portion between the holding members 204 and 205.
A guide 216 is attached using a screw 206 to limit the movement of the holding members 204 and 205 in the axial direction.

Next, the operation of fixing the syringe 2 using the syringe adapter 200 having the above structure will be described.
This will be described with reference to FIGS.

First, referring to FIG. 6, a syringe 2 is attached to a flange receiving portion 203 provided on a cylinder adapter 200.
Is positioned.

Next, referring to FIG. 7, the holding members 204,
By rotating the first lever 210 of the 205 clockwise, the body of the syringe 2 is held by the holding members 204 and 205. At this time, the flange portion 5 of the syringe 2 is connected to the flange receiving portion 203 and the holding members 204 and 2.
05, the rear end side and the outer surface side of the flange portion 5 are all covered, and the front end side is almost covered.

Next, the syringe 2 is connected to the injection head 10 using the syringe fixing aid 1 having the piston adapter 100 and the cylinder adapter 200.
The procedure for attaching to the device will be described with reference to FIGS.

First, referring to FIG. 8, the syringe adapter 200 is attached to the injection head 10, and the piston adapter 100 is attached to the plunger 11.

Next, referring to FIG. 9, while holding the holding members 204 and 205 of the syringe adapter 200, the male screw 103b of the piston adapter 100 is connected to the female screw 3a of the piston 3 while rotating the syringe 2. Screw and connect.

Thereafter, as shown in FIG. 10, the holding member 20 is moved by using the first lever 210 and the second lever 211.
Using 4 and 205, the main body of the syringe 2 is fixed. Thus, the attachment of the syringe 2 to the injection head 10 is completed.

As described above, in this embodiment, even if the syringe has a shape that cannot be directly connected to the injection head 10, the syringe fixing auxiliary having the syringe adapter 200 and the piston adapter 100 in this embodiment is used. The use of the device 1 enables the connection.

As a result, two types of syringes can be attached to one injection head 10, so that it is possible to improve the convenience of doctors, patients, and the like at medical sites.

It should be understood that the embodiments disclosed this time are illustrative in all aspects and not restrictive. Therefore, in the present embodiment, the connection between the syringe and the piston is made by screwing the screws. However, the connection is not limited to this structure, and another well-known connection structure may be used. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing the structure of a syringe fixing aid according to the present invention.

FIG. 2 is a perspective view showing the structure of a piston adapter according to the present invention.

FIG. 3 is a first diagram showing the operation of the piston adapter according to the present invention.

FIG. 4 is a second diagram showing the operation of the piston adapter according to the present invention.

FIG. 5 is a perspective view showing a structure of a syringe adapter according to the present invention.

FIG. 6 is a first diagram showing an attaching operation of the syringe adapter according to the present invention.

FIG. 7 is a second diagram showing the mounting operation of the syringe adapter according to the present invention.

FIG. 8 is a first diagram showing a procedure for mounting a syringe fixing auxiliary device according to the present invention.

FIG. 9 is a second diagram showing a procedure for mounting a syringe fixing auxiliary device according to the present invention.

FIG. 10 is a third view showing a procedure for mounting the syringe fixing auxiliary device according to the present invention.

FIG. 11 is a first diagram illustrating the operation of the injection head.
FIG.

FIG. 12 shows a second example of the operation of the injection head.
FIG.

FIG. 13 is a perspective view showing a shape of a syringe in the first conventional example.

FIG. 14 is a first view showing a state in which a syringe is attached to the injection head.

FIG. 15 is a second view showing a state where the syringe is mounted on the injection head.

FIG. 16 is a perspective view showing a shape of a syringe in a second conventional example.

[Explanation of symbols]

1 Auxiliary device for fixing a syringe, 2 syringes, 3 pistons, 3a female thread, 5 flange, 10 injection head, 11 plunger, 12 inner peripheral surface, 1
3 Engagement protrusion, 100 piston adapter, 200 syringe adapter.

Claims (2)

[Claims] 1. A syringe having a cylindrical main body having a flange on one end side and a piston housed in the main body so as to be movable in an axial direction, the flange being connected to an injection head. A flange fixing device for fixing the syringe by sandwiching and fixing the flange side of the syringe along a plane intersecting the axial direction. 2. The syringe fixing means covers the flange portion of the syringe from a front end side of the syringe, and a flange receiving portion supporting the flange portion from a rear end side and an outer surface side of the syringe. Supporting the flange portion together with the flange receiving portion, and sandwiching the main body portion along an outer peripheral surface of the main body portion of the syringe in a plane intersecting the axial direction, The flange connection device according to claim 1, further comprising a pair of holding members for holding.