JPH10192399A - Transfusion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely hold the flange part of a sucker even at the time of changing a syringe size by pressing the flange part of the sucker to a slider and holding it. SOLUTION: When the push button 4-1 of a slider release device is pushed, the driving lever 6 of a holding arm 5 is rotated clockwise with a spindle 6-1 as a center in linkage. Thus, the spindle 5-1 of the holding arm 5 is moved to left against a return spring 5-3, the holding arm 5 is opened and the flange part 2-1 of the sucker 2 can be received. After the flange part 2-1 of the sucker 2 is entered, when the pressurization of the push button 4-1 is released, the respective parts are reversely moved and the holding arm 5 presses the flange part 2-1 of the sucker 2 of the slider 3 by the spring force of the return spring 5-3 acting on the spindle 5-1, presses it to the part 3-2 and holds it. Thus, even when the thickness of the flange part 2-1 is changed, the flange part 2-1 is surely held.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an infusion device,
The rotation of the prime mover moves the syringe sucker,
The present invention relates to a drive mechanism of an infusion device for injecting blood or the like into a human body.

[0002]

2. Description of the Related Art FIGS. 4A and 4B are explanatory views of a conventional infusion device showing a state in which a syringe and a sucker housed in the syringe are mounted on an infusion device main body. FIG. 4B shows a state immediately before the syringe 1 and the sucker 2 are mounted on the infusion device, and FIG. 4B shows a state after the mounting. 4A and 4B, reference numeral 1 denotes a syringe, 1-1 denotes a flange of the syringe 1, 2 denotes a sucker, 2-1 denotes a flange of a sucker, 3 denotes a slider, and 3-1 denotes a slider of the slider. The holding member of the collar portion of the child, 3-2 is the pressing portion of the sucker, 3-3
Is a groove, 4 is a slider release mechanism (not shown)
4-1 is a push button of the lever, 10 is a main body, 10-1 is a flange 1-1 of a syringe provided on the main body.
Receiving groove. In FIG. 4A, in order to attach the syringe 1 and the sucker 2 provided inside to the infusion device main body 10, the push button 4-1 of the slider 3 is pressed to release the engagement between the slider 3 and the feed screw, and the slider 3 is moved. Is moved in the direction of the flange portion 2-1 of the syringe sucker 2 and the pressing portion 3-2 is pressed against the bottom of the sucker 2, and the syringe 1 and the sucker 2 are connected to the main body as shown in FIG. Attach to The width of the groove 3-3 of the holding member of the slider that holds the collar of the sucker has a size corresponding to the maximum dimension of the flange of the syringe to be mounted.

[0003]

In the conventional structure as described above, since the length of the groove 3-3 of the holding member for the collar portion of the sucker is constant, the thickness of the collar portion of the sucker depends on the size of the syringe. If the syringe is small, there is a problem that a gap is formed between the holding member 3-1 and the flange 2-1 of the sucker when the syringe is mounted on the device, and the flange cannot be reliably held on the slider. there were.

[0004]

The infusion device according to the present invention has a structure in which a holding arm for holding a collar portion of a sucker on a slider can be moved and turned in the same direction as the movement direction of the slider. Then, the collar of the sucker is pressed and held by the holding arm.

[0005]

In the construction as described above, since the collar of the sucker is pressed and held on the slider by the holding means, the flange of the sucker can be reliably held on the slider even if the size of the syringe is changed. .

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1A and 1B are views showing a state before holding a collar portion of a syringe sucker on a slider portion according to an embodiment of the present invention. FIG. 1A is a side view of a main part, and FIG.
FIG. 2 is a front view in the direction of arrows along the line AA ′ of FIG. 2A and 2B are views showing a state after the collar of the sucker is held by the slider. FIG. 2A is a side view of a main part, and FIG. 2B is an arrow along the line AA ′ in FIG. 2A. It is a front view of a direction.

In FIG. 1A, a push button 4-1 is pressed to hold a holding arm 5 for holding a collar portion of a sucker of a slider 3, and the holding arm 5 is rotatably supported by a support shaft 5-1 to open left and right. The slider 3 can be made to approach the end of the sucker without the flange 2-1 of the sucker coming into contact with the holding arm 5. Next, as shown in FIG. 1B, the slider 3 is moved to the left in FIG. 1A so that the abutment contact surface 3-1 of the slider 3 abuts on the end surface of the aspirator 2.
When the push button 4-1 is returned, the holding arm 5 pivots and surrounds the collar 2-1 of the sucker from the left and right, and approaches the slider of the sucker to press and hold the collar of the sucker against the slider 3. I do.

FIGS. 3 to 3C show FIGS. 1A, 1B and 2A.
FIG. 3 is an explanatory view of a main part of the slider 3 shown in FIG.
A shows a state in which the holding arm 5 holding the collar of the sucker is closed, FIG. 3B shows a state in which the holding arm 5 of the sucker is opened, and FIG. 3C shows the syringe 1 and the sucker 2 held by the slider 3. Each state is shown. 3A to 3C, 3 is a slider, 4-1 is a push button, 4-2 is a lever, 4-3 is a support shaft of a lever, 5 is a holding arm, 5-1 is a support shaft of a holding arm, and 5-1 is a support shaft of a holding arm. 2 is a screw groove of the support shaft, 6 is a drive lever of the holding arm, 6-1 is a support shaft of the lever, 6-2 is an engagement pin with the screw groove 5-2, and 7 is a return spring. Two holding arms 5 are provided together with other related parts, and the two holding arms 5 are rotated in opposite directions.

In FIG. 3B, when a push button 4-1 of a slider release device (not shown) is pressed, a drive lever 6 of a holding arm 5 interlocked with the push button 4-1 moves the support shaft 6-1. Rotating around the center, the engaging pin 6-2 of the lever 6 is engaged with the screw groove 5-2 of the support shaft 5-1 of the holding arm 5, and the support shaft 5-1 of the holding arm 5 is returned. The holding arm 5 is moved to the left against the spring 7 and the support shaft 5-1 rotates counterclockwise by the action of the engagement pin 6-2 and the screw groove 5-2 to hold the collar portion of the sucker. Will open.

Next, as shown in FIG. 3A, when the push button 4-1 is returned, the lever 4-2 of the release device is returned and the drive lever 6 of the holding arm 5 is returned, and the support shaft 5-1 of the holding arm 5 is returned. Moves rightward by the action of the return spring 7 and rotates clockwise by the action of the engagement pin 6-2 and the screw groove 5-2 to close the holding arm 5. And FIG.
In the state A, since the syringe 1 is not set, the holding arm 5 approaches to the position just before the pressing portion 3-2 of the slider 3 against the sucker. FIGS. 3A and 3B show a state where the push button 4-1 is operated without a syringe.
As shown in FIG. 3C, the flange 2-1 of the sucker 2 is
When the push button 4-1 is restored in a state in which the push button 4-1 is brought into contact with the sucker pressing portion 3-2, the holding arm 5 is moved to the sucker flange 2-1.
Is pressed against and held against the sucker pressing portion 3-2 of the slider 3. In the state shown in FIG. 3C, the two holding arms 5 make the flange 2-1 press the slider 3 against the slider 3.
Since the return spring 7 is pressed against and held by the return spring 2, the flange 2-1 of the sucker can be reliably held on the slider 3 even if the thickness of the flange 2-1 changes.

When the syringe 1 is removed from the infusion apparatus main body 10, when the push button 4-1 is pressed, the two holding arms 5 are opened in conjunction with each other, and the syringe 1 can be easily removed from the main body 10.

[0012]

Since the infusion device according to the present invention has the above-described structure, when the syringe is mounted on the infusion device main body, the holding arm of the collar portion of the sucker is operated in conjunction with the operation of pressing the slider push button. It moves in the direction of movement and rotates to facilitate holding of the collar of the sucker, and by restoring the push button, the holding arm presses and holds the flange against the slider, so the size of the syringe is changed. Has the effect of being able to always reliably hold.

[Brief description of the drawings]

FIG. 1A is a side view of a main part showing a state before an end of a sucker is held by a slider in an embodiment of an infusion device according to the present invention.

FIG. 1B is a sectional view taken along line A-A ′ of FIG. 1A.

FIG. 2A is a side view of a main part of the infusion device according to the embodiment of the present invention, showing a state after the end of the sucker is held by the slider.

FIG. 2B is a sectional view taken along the line A-A ′ of FIG. 2A.

FIG. 3A is a longitudinal sectional side view of a main part of a slider portion of an embodiment of an infusion device according to the present invention.

FIG. 3B is a longitudinal sectional side view of a main part of a slider portion of the embodiment of the infusion device according to the present invention.

FIG. 3C is a longitudinal sectional side view of a main part of a slider part of the embodiment of the infusion device according to the present invention.

FIG. 4A is a side view of a main part showing a state before an end of a sucker is held by a slider of an infusion device conventionally implemented.

FIG. 4B is a longitudinal sectional side view of a main part showing a holding state of a slider and an end portion of a suction tube of a conventional infusion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Syringe 1-1 Syringe flange part 2 Suction piece 2-1 Suction piece flange part 3 Slider 3-1 Suction piece flange holding part 2-2 Slider suction piece pressing part 3-3 Suction piece Groove of holding member of flange 4-1 Push button 4-2 Lever 4-3 Lever support shaft 5 Holding arm 5-1 Support arm support shaft 5-2 Support shaft screw groove 6 Holding arm drive lever 6- DESCRIPTION OF SYMBOLS 1 Support shaft of drive lever 6-2 Engagement pin 7 Return spring 10 Infusion device main body

Claims (1)

[Claims] An infusion device having a feed screw driven by a prime mover and configured to press a syringe sucker by a linearly movable slider engaged with the feed screw and to send out liquid, wherein a moving direction of the slider is provided. Holding means for holding a collar of a slider sucker fixed to a support shaft movably and pivotably supported, and when the holding means is moved in a direction away from the slider, the holding means is An infusion device, characterized in that the support shaft is pivoted so as to be separated from the flange, and the support shaft is pivoted so that the holding means engages with the flange when the holding means approaches the slider.