JP2501067B2 - Syringe injection pump - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safe and easy-to-handle syringe injection pump capable of stepwise injecting a liquid medicine or the like in an arbitrary setting pattern, and particularly to one end of a pusher inserted into the syringe. The present invention relates to an improvement of a guide means of a slider that locks and guides it so that it can be moved back and forth.

[0002]

2. Description of the Related Art Generally, a syringe injection pump, as shown in FIGS. 4 to 5, has a recess 14 for supporting a syringe (not shown) on a base 10 and a syringe supported by the recess 14 elastically pressed from above. Holding part 18 composed of a clamper 16 and a screw shaft 22 connected to the output shaft of a small electric motor 20 as a drive source, which is arranged at the bottom of the base 10.
A clutch mechanism 24 that is detachably and urgingly pushed and screwed
And a slider 26 provided on the upper part of the base 10 through a through-hole 28 formed in the base 10 for operating the clutch mechanism 24, and a bearing axially supported on the upper part of the slider 26. A pair of slide guides 32 for guiding the slider 26 in a straight direction via the clutch mechanism 24.
And a rubber sheet 34 having a notch 35 formed in the central longitudinal direction to seal the connecting member 33 that connects the slider 26. Further, the clutch mechanism 24 is composed of a half nut 38 that is detachably engaged with the screw shaft 22 that passes through the block 36, and a compression spring 40 that elastically presses and urges the half nut 38. .

The syringe injection pump thus constructed holds a syringe (not shown) in a holding section 18 on the base 10 in a detachable manner in parallel, and includes a pressing element slidably inserted into these syringes. One end is locked to the locking portion 27 of the slider 26, and the slider 26 is moved straight by the electric motor 20 so that the liquid or the like filled in each syringe has a constant flow rate to the extracorporeal circulation blood circuit or blood vessel of the patient. It is possible to perform step injection continuously.

[0004]

The conventional syringe injection pump of this type is disposed on the back surface of the slider 26 and the base 10 which are engaged with one end of the pusher and move in the straight direction by a single drive source. Connecting part 3 for connecting with the clutch mechanism 24
3 is inserted through the elongated hole 28 and is sealed by a rubber sheet 34 attached to the back surface of the elongated hole 28 to protect a slide guide 32 provided directly below the elongated hole 28.

However, in the elongated hole 28 formed in this way, liquid or foreign matter is likely to accumulate on the rubber sheet 34 portion of the elongated hole 28, and the foreign matter that has penetrated into the inside through the notch 35 of the rubber sheet 34 is likely to accumulate. When the screw shaft 22 is entangled or attached, the movement of the drive source is not reliably transmitted to the slider 26, the transmission efficiency is lowered, the movement of the slider 26 is impaired, and the pharmaceutical liquid in the syringe is quantitatively and continuously injected into the patient. Irregularities result in a dangerous condition for the patient, and in order to prevent such liquids and foreign substances from entering, the base 10 and the syringe injection pump held by the base 10 must be installed vertically. It had some difficulties such as being constrained such as not being possible.

Therefore, an object of the present invention is to connect a pusher slidably inserted in a syringe held by a holding portion on a base to a syringe by a single drive source in a detachable manner. Te, thereby locking the slider moves linearly, by <br/> configured to guide holding the syringe axis direction by the slider guide means, liquid or foreign matter from entering from the outside to the slider guide portion preventing the reliable is to provide a syringe infusion pump capable of achieving a stable movement of the slider.

[0007]

To achieve the above object, in a syringe injection pump according to the present invention, a pusher of a syringe held on a base is locked to a slider which can move forward and backward. In a syringe injection pump that linearly moves by a drive source and injects the liquid medicine filled in the syringe quantitatively and continuously , it slides inside the holding part formed to hold the syringe on the base. a slider that linearly movable is detachably connected to Rutotomoni single driving source comprises a locking portion for locking the fitted and interpolated presser with, it is inserted the slider to the syringe axis direction and a guide means for guiding the holding provided, said guide means,
Both ends are supported by the end of the holding part and the upper end of the base.
In addition, it is formed into an inverted U-shaped cross section with an open bottom and
The guide rod with a guide groove formed inside the mouth and the guide rod
It consists of a bearing means that is fitted and inserted in the internal guide groove.
And integrally coupled with the slider inside the guide rod.
The bearing means is slidably guided and supported .

[0008]

According to the syringe injection pump of the present invention,
Slidingly inserted into the syringe held by the holding part on the table
It is possible to engage and disengage the pressed pusher by a single drive source.
Connect it, lock it on the slider that moves straight, and
Guide the slider in the axial direction of the syringe by the guide means.
By configuring to hold the slider from the outside
Do not allow liquid or foreign matter to enter the guide part of the
The stable movement of the Ida is achieved and the patient's extracorporeal blood circulation
It is possible to inject a medicinal solution into the tract and blood vessels quantitatively and continuously.
Can improve the reliability of the syringe injection pump.
I can .

[0009]

EXAMPLE Next, a syringe injection pump according to the present invention will be described.
Examples will be described in detail below with reference to the accompanying drawings.
It

FIG . 1 is a plan view of a syringe injection pump according to the present invention, and FIG. 2 is a sectional view taken along line BB of FIG. 1 and 2, reference numeral 42 indicates a base (hereinafter referred to as a frame), and a small electric motor 44 capable of rotating in the forward and reverse directions is attached to a lower portion of the frame 42, and the electric motor 44 is a reduction gear. It is integrally assembled via a mechanism and a transmission gear (not shown). This output shaft of the motor 44, the screw shaft 46 is connected, together with the screw shaft 46 is rotatably supported by the rotatably bearing is biased with bearing screw shaft 46 by a compression spring (not shown) in one direction, It is supported so as to be slightly movable in the axial direction. Motor of screw shaft 46
Oite 44 side, when a predetermined thrust force is applied to the operating plate 48 screw shaft 46, the spring bullet The operation plate 48
Co When against the force constituting the so that is moved to the right in FIG.
Is provided with a detector (for example, a limit switch) 50 for detecting the movement of the operating plate 48.
It is more fixed to a stay 52 formed an inverted L-shape.

On the other hand, the center of the upper surface of the frame 42 is in the longitudinal direction.
A pair of holding parts 5 formed in a mountain shape from the central part toward the end toward the end, and V-shaped groove parts having flat centers at both sides thereof.
4 and a parallel support in the groove portion on the outside of the holding portion 54.
A pair of clampers 56 that elastically clamp the two held syringes 58 from above are provided. Also,
And center of the end portion of the formed holder 54 in Yamagata, frame - guide lever 62 in the stand 60 fixed to the end portion upper surface of the arm 42, constituting the guide means of the slider 64 to be described later
One end of is supported . And, in this guide rod 62
, Together with the slider 64 is inserted, the slider 6
4 bearing is a bearing hand block 66 is inserted therein
Is inserted a plurality of cam followers 68 made stage, the slider 64 is Ru is slidably guided and supported.

At the end of the slider 64, the pair of V-groove holding portions 54 is engaged with a syringe 58 clamped by a clamper 56 and is engaged with a syringe 58. The portion 65 is formed, and the locking portion 65 is formed.
The pusher 55 locked to the small electric motor 44 is
The chemical solution in the syringe 58 is smoothly injected into the patient's body by the continuous linear movement of the slider 64 by the.

In this case, the guide rod 62 is formed in an inverted U- shape in cross section having an opening on the bottom surface, and a guide formed with a groove into which the outer periphery of the cam follower 68 can be inserted , inside the opening. groove 67 is Ru provided. Then, the cam follower 68 that will be guided by the guide groove 67, because it is completely housed within the guide lever 62, without liquids or foreign matter from the outside from entering into the guide portion, smooth movement of the slider 64 Can be secured.

Next, a clutch mechanism for converting the rotational force of the small electric motor 44 into a linear motion and transmitting this motion to the slider 64 or stopping the motion will be described with reference to FIGS. 1, 2 and 3. That is, as shown in FIGS. 1 and 2, the bottom of the frame 42 is disengageable with the screw shaft 46 whose one end is connected to the output shaft of the small electric motor 44.
0 is provided. Then, this clutch mechanism 70
Is a guide shaft 74 provided inside the box body 72 fixed to the bottom of the frame 42 and a frame body 78 integrally molded with synthetic resin in a guide groove 76 formed on the inner side surface of the box body 72 in the axial direction. It is movably supported by the guide.

The frame 78 and the slider 64 provided on the upper surface of the frame 42 are connected via a connecting shaft 80, and a half nut 82 is fixedly supported at the end of the connecting shaft 80 on the frame 78 side. A half nut 82 swingably supported by 80 is pressed and urged against the screw shaft 46 by a compression spring 84 inserted between the half nut 82 and the inner wall of the frame 78.

Further, at the other end of the connecting shaft 80 on the slider 64 side, the knob 8 housed inside the slider 64 is provided.
6 is fixed, and an operating portion of the clutch mechanism 70 is configured by protruding a part of the knob 86 from the side opening of the slider 64 to the outside.

The slider 6 of the operating portion having the above-mentioned structure
The half nut 8 screwed onto the screw shaft 46 is operated by pushing the knob 86 protruding from the four side surfaces with a finger.
2 can be easily separated.

As described above, the rotation of the screw shaft 46, which is rotationally driven by the operation of the small electric motor 44, causes the half nut 8 to rotate.
By linearly moving the slider 64 in the axial direction via 2, the drug solution filled in the syringe 58 can be continuously injected into the patient's body, and the presser 55 moves in a full stroke to move the syringe 58 into the syringe 58. When the chemical liquid is exhausted, the movement of the slider 64 stops, and the thrust force acting on the screw shaft 46 moves the operating plate 48 to the right side in the figure against the spring, and operates the limit switch 50 to stop the motor. You can

[0019]

[Effect of the Invention] As apparent from the above-described embodiments, according to the syringe infusion pump of the present invention, a holding portion formed so as to hold the syringe on a base, slidably in the syringe fitted co When Ru provided with a locking portion for locking the been presser
A slider that moves straight is detachably connected to a single drive source, and a guide means for guiding and holding it by inserting the slider to the syringe axis direction is provided on the guide means
Supports both ends to the end of the holding part and the upper end of the base.
And has an inverted U-shaped cross section with an open bottom.
Guide rod with a guide groove inside the opening of the
Such as a bearing means provided so as to be inserted into a guide groove inside the rod.
It is integrally connected with the slider inside the guide rod.
Since the bearing means is configured to slidably guide and support, it is possible to reliably prevent liquids, foreign matters, and the like from entering the guide portion of the slider from the outside and stabilize the slider. movement Ru obtained. Therefore, the pon of the present invention
Flop, to extracorporeal blood circuit or a blood vessel or the like of a patient, it is possible to inject the liquid or the like quantitatively and continuously, Pong of this kind
It has excellent effects such it is possible to improve the reliability of the flop. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and it is needless to say that various design changes can be made without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a plan view of a syringe injection pump showing an embodiment of a syringe injection pump according to the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

3 is a cross-sectional view of a syringe injection pump, in which (a) is a view taken in the direction of arrow C in FIG. 2, (b) is a cross-sectional view taken along line DD of FIG. 2, and (c) is shown in FIG. It is an EE sectional view.

FIG. 4 is a plan view of a conventional syringe injection pump.

FIG. 5 is an AA cross-sectional view of a conventional syringe injection pump.

[Explanation of symbols]

10 Base 14 Recess 16 Clamper 18 Holding 20 Electric Motor 22 Screw Shaft 24 Clutch Mechanism 26 Slider 27 Locking Part 28 Long Hole 30 Bearing 32 Slide Guide 33 Connecting Part 34 Rubber Sheet 35 Notch 36 Block 38 Half Nut 40 Compression Spring 42 Base (frame) 44 Small Electric Motor 46 Screw Shaft 48 Operating Plate 50 Detector (Limit Switch) 54 Holding Part 55 Pusher 56 Clamper 58 Syringe 60 Stand 62 Guide Rod 64 Slider 65 Locking Part 66 Block 67 Guide Groove 68 Bearing (cam follower) 70 Clutch mechanism 72 Box body 76 Guide groove 78 Frame body 80 Connecting shaft 82 Half nut 84 Compression spring 86 Knob

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-42215 (JP, A) JP-A-2-41173 (JP, A) JP-A-1-139074 (JP, A) Actual development Sho-59- 5940 (JP, U)

Claims (1)

(57) [Claims] 1. A fixed amount of a liquid medicine or the like filled in the syringe is quantitatively and continuously obtained by engaging a pusher of a syringe held on a base with a slider that can move forward and backward and moving the slider linearly by a drive source. In a syringe injection pump for injecting into, a holding portion formed to hold the syringe on the base ,
A slider that moves straight is detachably connected to Rutotomoni single driving source comprises a locking portion for locking the slidably fitted interpolated presser into the syringe, which is inserted the slider the setting and a guide means for guiding and holding the syringe axis
The guide means has both ends at the end of the holding portion and the base.
U-shaped cross-section supported by the upper end of the and opening at the bottom
-Shaped guide rod with a guide groove formed inside this opening
And to be inserted into the guide groove inside this guide rod.
Bearing means, and the slidable inside the guide rod.
Guides and supports the bearing means, which is integrally connected to the lid, slidably
A syringe injection pump having the above structure .