JPS5997672A - Syringe injection apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Background of the Invention Technical Field The present invention relates to a syringe injection device IC that can inject a drug contained in a syringe into a patient.

Prior art Conventional 1. In the author's treatment, in order to continuously administer small doses of anticancer drugs and moderate antibiotics to patients over a long period of time,
A syringe injection device is used.

As shown in FIGS. 1 and 2, a conventional syringe injection device 1 includes a syringe holding part 4 formed on the outside of a cabinet 2 and holding a syringe 3, and a cabinet 2.
a drive motor 5 disposed within the cabinet 2; a drive screw 6 driven by the drive motor 5; a push head 7 capable of pushing the pusher 3A of the syringe 3 held in the syringe holder 4; A driven nut is disposed inside the drive screw 6Vc and can be connected to the drive screw 6Vc through a threaded portion 8A formed only on a half of the inner circumferential surface, and is integrated with the pushing head 7 in the pushing direction. 8, and a clutch which is disposed close to the push-cut hend door and enables the driven nut 8 and the drive screw 6 to be engaged and disengaged by separating the threaded portion 8A of the driven nut 8 from the threaded engagement position with the drive screw 6. It has an operation section 9.

That is, the syringe injection device 1 has a clutch operating section 9.
After setting the pushing head 7 to the pushing start position with respect to the pusher 3AVc of the syringe 3 with the driven nut 8 and the drive screw 6 disengaged by the switching action applied to the
1. By connecting the driven nut 8 to the drive screw 6 by a switching action applied to the clutch operating portion 9. The pushing head 7 is forcibly moved as the drive screw 6 rotates, and the pusher 3A of the syringe 3 is pushed to release the 4-g agent in the syringe 3 to the outside, thereby performing an injection operation into the patient. It is possible. Here, the injection operation by the syringe injection device 1 requires high reliability such that it is necessary to accurately perform constant slow injection over a long period of time.

However, in the above-mentioned syringe injection device 1, the slit 2 is cut in the wall of the cavity 2 in a long range in the direction of the pushing force of the pushing head 7 through which the pushing head door and the clutch operation part 9 can be inserted. The push hand door and the clutch operation section 9 are movable between a part of the slit 2c and the other end.

Therefore, in the above-mentioned syringe injection device 1.

When a liquid or the like drips onto the cabinet/bottom, a portion of the liquid enters the cabinet 2 through the slit 28, and the drive mechanism consisting of the drive motors 5, j (the drive screws 6, the driven nuts 8, etc.) There is a risk that the syringe injection device 1 may become contaminated and impede the reliability of the injection operation by the syringe injection device 1.

As mentioned above, since slow injection is performed over a long period of time, changes in the injection operation in the event of an abnormality are minute, and it is extremely difficult to promptly discover the abnormal state. That is, the syringe injection device 1 has the risk of causing an abnormality in the injection operation, and it is extremely difficult to quickly detect the occurrence of the abnormality, making it impossible to ensure stable injection operation with high reliability. In addition, the syringe injection device 1vc has @dynamic motor 5. The interior space of the cabinet 20, which houses the drive mechanism consisting of the drive screw 6, the driven nut 8, etc., is always open to the outside via the sling 2A that forms a relatively wide opening.

There is a risk that lubricating oil, etc. applied to the drive mj tR to ensure smooth operation of the drive mechanism may adhere to the outer curvature of the cabinet 2, the push head 7, the clutch operation section 9, etc., and stain the hands and fingers of the operation section. This may impair the hygiene and safety of the injection operation.

Therefore, the conventional syringe injection device has a problem in that it cannot ensure safe and stable injection operation with high reliability.

■Object of the Invention The object of the present invention is to provide a syringe injection device that can ensure safe and stable injection operation with high reliability.

■Structure of the Invention In order to achieve the above objects, the present invention has two features: a syringe holding part formed on the outer surface of the cabinet, a driving member disposed inside the cabinet, and a drive member held by the syringe holding part. a pushing head capable of pushing a pusher of a syringe; and a pushing head disposed within the cavity insert and connectable to the driving member.

a driven member that is integrated with the pushing head in the pushing direction; and a clutch operating section that is arranged close to the pushing head and that enables the coupling between the driven member and the first drive member to be engaged and disengaged. In the syringe injection device, one end of a connecting tube extending substantially parallel to the pushing direction of the pusher is fixed to the pushing head, and an intermediate portion of the connecting tube is provided in the cabinet. It is inserted into the hole in a fluid-tight manner so as to be movable in the axial direction.

An intermediate member for transmitting an operation applied to the clutch operating portion to the driven member is arranged to extend into the hollow portion of the connecting pipe.

Moreover, the syringe injection device rC according to the present invention has the following features: '＋
The insertion hole is formed in a vertical wall of the cabinet.

Further, the syringe injection device 11 according to the present invention is provided with a sealing member in the insertion hole.

Moreover, the syringe injection device according to the present invention is provided at an upper portion of the cabinet with respect to the insertion hole.

It is equipped with a canopy-shaped liquid receiver.

■1 Detailed explanation of the invention Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows a syringe injection device 10 according to an embodiment of the present invention.
4 is a sectional view taken along line IV-IV in FIG. 3, FIG. 5 is a sectional view taken along v'-vti of the third factor, and FIG. 6 is a sectional view taken along line IV-IV in FIG. 3. A sectional view taken along IN, and the seventh figure is a perspective view showing the syringe injection device 10.

The outer surface of the cavity 11 of the syringe injection device 10 has a syringe holding portion 1 that holds the syringe 12 in a predetermined position.
3 is formed. The syringe holding part 13 includes an engagement groove part 15 that allows the flange part 14 of the syringe 12 to be engaged therein, and a clamp 7'7-m 17 that allows the outer cylinder part 16 of the syringe 12 to be pressed and held. are doing. The clamp arm 17 is capable of pressing the outer cylinder portion 16 of the syringe 12 under the biasing force of a compression spring 18 housed within the cabinet 11 .

Further, within the cabinet 11, a drive motor 19 that can be controlled to a predetermined output rotation speed is fixedly arranged, and a drive screw 20 as one drive member in the present invention.
is rotatably supported.

The output shaft of the drive motor 19 and the ratio screw 20 are connected via a drive gear 21 and a driven gear 22. Note that the drive screw 20 is inserted into the middle 7 [?] of the syringe 12 held by the syringe holding part 13 arranged parallel to the axis.

Moreover, a slide groove 23 is carved on the outer surface of the cabinet 11. The slide groove 23 is connected to the syringe holding part 1
The slide groove 23 extends in the same direction as the technician's direction of the syringe 12 held by the syringe holding part 13.
The base of a pushing spatula 125 that can push the pusher 24 of the syringe 12 held in the syringe 12 is slidably positioned. In addition, in FIG. 1, 26 is a head cover of the J instep head 25.

A connecting pipe 27 extending substantially parallel to the pushing direction of the 11p element 24 is fixedly attached to the pushing head 25 .

The connecting pipe 27 extends parallel to the movable screw 20, and its intermediate portion is inserted into an insertion hole 29 formed in the vertical wall portion 28 of the cabinet 11 so as to be movable in the axial direction in a liquid-tight manner. , and the other end is located within the cabinet 11. Note that a sealing member 30 is joined to the insertion hole 29 to ensure a tight seal with respect to the connecting pipe 27. A holding member 31 is fixed to the other end of the connecting pipe 2γ. The retainers 81 to 31 have their protrusions 32 slidably engaged in guide grooves 33 in the cabinet 11 that are carved parallel to the drive screw 20.

In addition, the holding member 31 allows the intermediate portion of the drive screw 20 to be inserted into the hole 35 formed in both the 1t' (tl wall portions 34A and 34BIC). 7'!: Oh,
The other end of the connecting pipe 27 is connected to one side wall portion 3 of the holding member 31.
It passes through 4A.

In the hollow portion of the connecting pipe 21, an intermediate shaft 36, which serves as an intermediate member in the present invention, is arranged so as to be able to rotate.The portion VC of the intermediate shaft 36 that projects in the direction of the pushing head The clutch lever 37 as a clutch operation part in the invention is turned on.

The clutch lever 37 has both 1111 surfaces thereof held by the push-off head 25, and can be inserted into a housing portion 38 within the push spatula 25. Holding member 3 of intermediate shaft 36
1 (11+1) A subordinate ii'ilJ nut 39 as a driven member in the present invention is fixed to the part protruding from 1 (11+1). Back supported compression spring 4
1, the threaded portion 40 is always driven by the drive screw 20.
is pressed toward the screwed position. Further, the driven nut 39 is slidably held by the side walls 34A and 34B of the holding member 310, and is integrated with the pushing head 25 in the pushing direction via the connecting pipe 27. (The driven NAND 39 is connected via the intermediate shaft 36 and the clutch lever 37, not via the holding member 31 and the connecting pipe 27.
It may be integrated with the pushing head 25 in the pushing direction. ) That is, the clutch lever 37, middle 11iJ+1Q
Since f136 and the driven nut 39 are fixed to each other, an operating force that resists the biasing force of the compression spring 41 is applied to the clutch lever 37, and the clutch lever 31 is retracted into the accommodation portion 38 of the pushing head 25. If so, the driven nut 39 is attached to both side walls 3 of the holding member 310 through the rotation of the intermediate shaft 36.
The threaded portion 40 of the driven nut 39 rotates between 4A and 348.
is separated from the alignment position with the drive screw 20, and the drive screw 20
It becomes possible to release the connection between the driven nut 39 and the driven nut 39.

Furthermore, when the above operating force on the clutch lever 37 is removed, the threaded portion 40 of the driven nut 39 returns to the threaded engagement position with the drive screw 20 due to the biasing force of the compression spring 41, and the clutch lever 37 projects outward from the accommodating portion 38 of the pushing head 25. When the drive screw 20 rotates while the threaded portion 40 of the driven nut 39 and the A pivot screw 20 are engaged,
The driven nut 39 moves with the rotation of the drive screw 20,
The pushing head 25, which is integrated with the driven nut 39 in the pushing direction as described above, is also movable in the pushing direction.

Note that an eave-shaped liquid receiving portion 42 is provided above the insertion hole 29 of the cabinet 11, and the vertical wall portion 28
It is provided so as to protrude from the syringe holder 13 to prevent the liquid agent from falling into the insertion hole 29 from the syringe holding part 13 side. Incidentally, reference numeral 43 denotes a guide path for causing the liquid agent to fall to a position below the insertion hole 29.

44 is an external power input terminal, and 45 is a power switch of the syringe injection device 10.

■Specific operation of the invention □ When using the syringe injection device 10, first, the syringe 12 filled with a liquid agent is held in the syringe holding part 13. Here, the clamp part 14 of the syringe 12 is engaged in the engagement groove part 15, and the outer cylinder part 16 of the syringe 12 is held under pressure by the clamp arm 17. Connect the infusion catheter.

Next, by gripping the pushing head 25 and the thalassotile lever 37, an operating force that resists the biasing force of the compression spring 41 is applied to the clutch lever 37, and the clutch lever 37 is retracted into the housing portion 38. When the clutch lever 37 is retracted into the accommodation portion 38, the connection between the drive screw 20 and the driven nut 39 is released as described above.
The push head 25 gripped as described above is moved along the slide flt23 by manual operation, and the push head 25 is set at the push start position with respect to the pusher 24 of the syringe 12.

Next +c, the operating force on the clutch lever 37 is removed, and the threaded portion 40 of the driven nut 39 is returned to the threaded position with the drive screw 20 by the biasing force of the compression spring 41, and the driven nut 39 is screwed into the drive screw. Connect to 20. Furthermore, if the drive motor 19 is driven.

Rotate at the specified speed! Through the engagement of the driving screw 20 and the driven nut 39, the pushing head 25, which is integrated with the driven nut 39 in the pushing direction, moves at a predetermined speed to move the pusher 24 of the syringe 12 to a predetermined position. It can be pushed at a pushing speed, and the liquid medicine in the syringe 12 can be injected into the body at a predetermined injection speed for a long time.

According to the syringe injection device 10,! Pivoting motor 19
, drive screw 20, drive 1 jig wheel 21. The internal chamber of the cabinet 110, which houses the drive mechanism consisting of the driven float 2'2 and the driven nut 39, can be sealed liquid-tightly to the external space, and liquids etc. dripped onto the cabinet 11 are prevented from entering the cabinet. 11V'3 and contaminate the drive mechanism (and there is no risk of lubricating oil, etc. inside the cabinet 11 adhering to the outside surface of the cabinet 11, ensuring safe and stable injection operation with high reliability). It becomes possible to do so.

■ Specific Effects of the Invention As described above, the present invention provides a syringe holding portion formed on the outer surface of a cabinet, a driving member disposed inside the cabinet, and a pusher for a syringe held by the syringe holding portion. a pushing head capable of pushing the child; a driven member disposed within the cabinet and connectable to the yji moving member; and a driven member integrated with the pushing head in the pushing direction; In the syringe injection device, the syringe injection device includes a clamp operation part that is disposed close to the pushing head and enables the coupling state between the driven member and the driving member to be engaged and disengaged. One end of a connecting pipe extending substantially parallel to the moving direction is fixed, and the intermediate part of the connecting pipe is inserted into an insertion hole provided in the cabinet so as to be movable in the axial direction in a liquid-tight manner, and the clutch operating section Since the intermediate member that transmits the operation applied to the driven member to the driven member is arranged to extend into the hollow part of the connecting pipe, there is no leakage of liquids into the interior of the cabinet, and it also prevents lubricant from entering the outside of the cabinet. There is no adhesion (,
It becomes possible to ensure safe and stable injection operation with high reliability.

Further, in the syringe injection device according to the present invention, by forming the insertion hole in the vertical wall of the cabinet, it is possible to easily prevent liquid from entering the cabinet.

In addition, the syringe injection device according to the present invention has an OT ability to reliably prevent liquid from entering the cabinet by providing a sealing member in the insertion hole.

Further, the syringe injection device 4 according to the present invention is provided with an eave-shaped liquid receiving portion in the upper part of the cabinet with respect to the insertion hole, so that it is possible to more reliably prevent liquid from entering the cabinet. Becomes Noh.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional syringe injection device;
2 is a plan view of FIG. 1, FIG. 3 is a sectional view showing a syringe injection device according to an embodiment of the present invention, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. The figure is V-V@ in Figure 3.
FIG. 6 is a cross-sectional view taken along the line ■-vt in FIG. 3, and FIG. 7 is a perspective view showing the same syringe injection device. 10... Syringe injection device, 11... Cabinet, 12... Syringe, 13... Syringe holding part, 2
0... Drive screw, 24... Pusher, 25... Pushing head, 27... Connecting pipe, 28... Vertical wall portion, 29...
... Insertion hole, 30 ... Seal member, 36 ... Intermediate shaft, 31 ... Clutch lever 539 ... Driven nut,
42...Liquid receiving part. Patent Applicant Representative of Terumo Corporation Patent Attorney Osamu Shiokawa Figure 1

Claims (1)

[Claims] (υ A syringe holding part formed on the outer surface of a cabinet, a driving member disposed inside the cabinet, and a pusher of a syringe held in the syringe holding part that can be pushed. a pushing head; a driven member disposed within the cabinet and connectable to the driving member; and a driven member that is integrated with the pushing head in the pushing direction; In the syringe injection device, the syringe injection device includes a clutch operating portion that allows the driven member and the driving member to be engaged and disengaged from each other, and the clutch operating portion is provided on the pushing head and extends substantially parallel to the pushing direction of the pusher. One end of the connecting pipe is fixed, and the middle part of the connecting pipe is passed through the insertion hole provided in the cabinet in a liquid-tight manner to the axially moving fiheer, and the operation applied to the clutch operating part is controlled by the slave. A syringe injection device characterized in that an intermediate member for transmitting information to the member is disposed extending in a hollow portion of the connecting pipe. (2) The insertion hole is formed in a vertical wall of the cabinet. 2. The syringe injection device according to claim 1. (3) The syringe injection device according to claim 1 or 2, wherein the insertion hole is provided with a sealing member. (4) The insertion hole of the cabinet is provided with a seal member. The syringe injection device according to claim 2 or 3, further comprising an eaves-shaped receiving part in the upper part.