JPH0542214A - Transfusion equipment - Google Patents

Abstract

PURPOSE:To prevent backlash at the time of starting transfusion by providing supporting pieces for supporting the flanges of a syringe with elastic supporting pieces in transfusion equipment such as chemicals using the syringe. CONSTITUTION:A first and a second flange 21a, 23a are formed on a syringe 3. Meanwhile, the first supporting part 61 of a pump inserting and mounting part 5 for supporting the syringe 3 comprises a pair of supporting walls 61a and 61b, and a first elastic supporting piece 61c. The second supporting part 62 of a slider 64 comprises a second elastic supporting piece 62. The elastic supporting pieces 61c and 62 correspond to a change in the thickness of the first and the second flange 21a, 23a of the syringe 3 having various standards to support the first and tire second flange 21a. 23a without backlash.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion device for injecting various chemicals, blood, etc. into a human body using a syringe.

[0002]

2. Description of the Related Art Conventionally, an infusion device is known in which an infusion is automatically performed using a syringe. In this type of device, a syringe containing a drug solution is mounted, and a sucker of the syringe is pressed at a constant speed by a slider to perform infusion.

In order to accommodate the use of various types of syringes in this type of infusion device, a first flange formed on one end of the outer cylinder of the syringe and a first flange formed on one end of the sucker of the syringe. It is necessary to consider the thickness of the two flanges. In the conventional infusion device, the first and second
Of the various types of syringes are formed by forming support portions on the first and second support portions to which the flanges of FIG. It was ready for use.

[0004]

When the syringe is attached to the liquid transfusing device and the sucker is pressed at a constant speed by the slider, the pressing force causes the first and second suckers to move.
Flanges are urged to one of the first and second support portions, respectively. However, since the first and second support portions have a margin with respect to the thickness of the first and second flanges, rattling occurs when the syringe is mounted.
Further, rattling also occurs when the infusion operation is once suspended and then restarted.

As described above, when the rattling occurs at the start of the infusion operation, the slider sucks the sucker and the pressing force causes the first and second flanges to move to the first and second flanges. The drug solution in the syringe is not delivered until the bias is applied to one of the support portions. However, in this type of infusion device, the amount of infusion is not actually measured, but is calculated based on the amount of movement of the slider. Occurs. Then, when an operation such as once suspending and then restarting the infusion operation is repeated, the error is accumulated, and the set infusion amount is delivered even if the infusion amount is far less than the originally infused amount. Will be judged.

The present invention solves the above-mentioned drawbacks of the infusion device and is compatible with many types of syringes.
An object of the present invention is to provide a highly reliable infusion device that can reliably deliver a medicinal solution or the like without causing rattling at the start of infusion and has a simple structure.

[0007]

In the infusion device according to the present invention, a syringe is placed, and a slider provided movably is brought into contact with the sucker of the syringe, and the slider moves to press the sucker. In the infusion device configured as described above, a first support portion capable of supporting a first flange formed at one end of the outer cylinder of the syringe is provided on the main body side of the infusion device, and is formed at one end of the sucker of the syringe. The slider is provided with a second support portion capable of supporting the formed second flange, and at least the first support portion is provided with an elastic support piece that elastically presses the first flange. When the syringe is mounted on the device, the elastic support piece,
It is characterized in that the first flange is pressed and supported so as to be urged to one of the first support portions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the infusion device according to the present invention will be described below with reference to the drawings. FIG. 1 shows an external view of an infusion device according to an embodiment of the present invention. The case 2 of the infusion device 1 is provided with an operation section 4 for monitoring the infusion operation and infusion state of the syringe 3, and a pump mounting section 5 to which the syringe 3 can be attached. As the syringe 3, a standard product having a total capacity of 10 ml, 20 ml, 30 ml, 50 ml or the like is used depending on the application.

Further, the operation unit 4 has a capacity display 6 for displaying the capacity of the syringe 3 mounted therein, a centralized display 7 for displaying various operating states, an infusion start indicator 8, and an infusion stop display. A device 9 and a 4-digit numerical display device 10 for displaying the flow rate during infusion and the cumulative flow rate in ml / hour or ml are arranged.

The centralized indicator 7 is provided with various indicators indicating the operating state of the infusion device, and the operation section 4 is also provided.
Includes a one-shot button 11 capable of sending a larger amount of liquid medicine than an ordinary liquid supply in an emergency, an infusion amount button 12 for selecting the displayed contents of the numerical display 10, and an infusion start / stop button 1.
3, a fast-forward button 14, a buzzer stop button 17, and a power button 15 are arranged. Furthermore, a flow rate setting button 16 is provided above and below the numerical display 10 so that the flow rate can be set for each digit.

The pump mounting portion 5 is an outer cylinder 21 of the syringe 3.
And a slider 24 that can press the sucker 23 that slidably moves in the syringe 3. The slider 24 is movably supported by a part of driving means covered with a bellows 29.

The outer cylinder 21 of the syringe 3 is held by the holding portion 26, and the rear end of the sucker 23 is brought into contact with the slider 24.
In addition, the first flange 21 formed at one end of the outer cylinder 21
a is supported by the first support portion 61 formed on the pump mounting portion 5, and the second flange 23a formed on the rear end portion of the suction member 23 is attached to the second support portion 62 formed on the slider 24. Supported. A flexible infusion pipe (not shown) communicating with the injection needle is connected to the tip of the syringe 3. Therefore, when the syringe 3 is mounted on the mounting portion 22 and the slider 24 is pressed by the driving means in the direction of the arrow a at the predetermined speed by the slider 24, the drug solution in the syringe 3 is pushed out at a predetermined flow rate, and the infusion pipe. And injected into the patient via a needle.

FIG. 2 shows a side view in which a part of the liquid transfusing apparatus 1 shown in FIG. 1 is cut away. The slider 24 that presses the sucker 23 of the syringe 3 mounted on the pump mounting portion 5 includes a feed screw 34 that is driven to rotate by a motor, and the feed screw 34.
The driven member 32 of the driving means 25, which is composed of the driven member 32 engaging with the driving member 4, is connected by the connecting member 30. At one end of the feed screw 34, a detection means 40 for detecting the pressure when the liquid medicine is injected into the patient is provided. Although not shown in detail, by operating the release button 28 attached to the slider 24, the feed screw 34
The slider 24 can be manually moved by releasing the engagement between the driven member 32 and the driven member 32.

On the other hand, one end 34a of the feed screw 34 abuts on the detecting means 40 via a hard ball 53, and a large gear 41 is attached to the other end to mesh with a small gear (not shown) on the motor side. To do.

The slider 24 is moved by the driving means 25 controlled on the basis of the set flow rate, and the sucker 23 is moved.
Is pressed in the direction of arrow a to push out a predetermined amount of the chemical solution. In this infusion device, the infusion amount is calculated based on the movement amount of the slider 24.

The first and second support portions 6 for supporting the first and second flanges 21a and 23a of the syringe 3 are provided.
Details of Nos. 1 and 62 are shown in FIG.

FIG. 3 shows the first flange 21 of the syringe 3.
The relationship between a and the 2nd flange 23a, and the 1st support part 61 and the 2nd support part 62 is shown. As shown in FIG. 3A, the first support portion 61 of the pump insertion portion 5 is composed of a pair of support walls 61 a and 61 b and a first elastic support piece 61 c, and the second support of the slider 24 is provided. The portion 62 is composed of the second elastic support piece 62.

The thicknesses T1 and T of the first flange 21a and the second flange 23a of the syringe 3 according to various standards
2 has a different thickness for each standard. Therefore, the gap G2 between the pair of support walls 61a and 61b of the first support portion 61 supporting the first flange 21a is larger than the thickest thickness T1 of the first flange 21a of the syringe 3 according to various standards. The gap G2 between the support wall 61a and the first elastic support piece 61c is formed in a wide gap and is narrower than the smallest thickness T1 of the first flange 21a. On the other hand, the second support portion 62 supporting the second flange 23a has a syringe 3 according to various standards.
The second elastic support piece 62a that forms a gap G3 that is narrower than the thinnest thickness T2 of the second flange 23a.

FIG. 3B shows a state in which the first flange 21a and the second flange 23a of the syringe 3 are supported by the first support portion 61 and the second support portion 62. The first flange 21a and the second flange 23a are prevented from rattling by the first elastic supporting pieces 61c and the second elastic supporting pieces 62a of the first supporting portion 61 and the second supporting portion 62. Supported.

[0020]

The infusion device according to the present invention supports at least the first flange of the first flange formed on the outer cylinder of the syringe and the second flange formed on the sucker without rattling. Therefore, the drug solution is immediately delivered from the syringe at the start of infusion. Therefore, even if the operation of temporarily suspending and then restarting the infusion operation is repeated, the error of the infusion amount does not occur, so that the set infusion amount can be accurately delivered. Further, the infusion amount displayed by the infusion device does not include an error.

[Brief description of drawings]

FIG. 1 is an external perspective view of an infusion device according to an embodiment of the present invention.

FIG. 2 is a side view of the infusion device of FIG. 1 with a part thereof cut away.

FIG. 3 (A) First and second support portions and first syringe
FIG. 6 is a side view of a main part showing a relationship with the second flange. (B) It is a side view of an essential part showing a state in which the first and second flanges of the syringe are engaged with the first and second support parts.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infusion device 3 Syringe 21 Outer cylinder 21a First flange 23 Sucker 23a Second flange 24 Slider 61 First support portion 61c First elastic support piece

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuo Matsubara 3-18-15 Hongo, Bunkyo-ku, Tokyo Atom Co., Ltd.

Claims (1)

[Claims] 1. An infusion device in which a syringe is placed, and a slider provided movably on the sucker of the syringe is brought into contact with the sucker, and the sucker is pressed by the movement of the slider. A first support portion capable of supporting a first flange formed at one end of the cylinder is provided on the main body side of the infusion device, and a first flange capable of supporting a second flange formed at one end of the sucker of the syringe. Two sliders are provided on the slider, at least the first supporting portion is provided with an elastic supporting piece that elastically presses the first flange, and when the syringe is placed on the infusion device, An infusion device, wherein an elastic support piece presses and supports the first flange so as to bias the first flange toward one of the first support portions.