JP2001009022A - Medical suction regulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to smoothly execute the regulation of the suction pressure in a medical suction regulator. SOLUTION: A suction regulator body 1 is provided with a transverse hole 5 penetrating through this body. A valve rod 6 is mounted at this transverse hole 5. The suction regulator is provided with a flow passage communicating the transverse hole 5 and a discharge port and is provided with a flow passage through which a suction port and a piston chamber 11 formed on the inner side of a regulator cover 2 communicate with each other. The valve rod 6 is provided with a flow passage through which its front end face communicates with the discharge port side. A piston 12 is inserted to one side of the transverse hole 5 and a valve is constituted of the front end face of the piston 12 and the front end of the valve rod 6. The valve is opened and closed and the suction pressure is regulated by regulating the position of the valve rod 6, by which the medical suction regulator is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical suction adjuster used for a suction treatment of a body fluid or blood.

[0002]

2. Description of the Related Art Conventionally, a suction regulator of this type has a mechanism for adjusting a suction pressure using a diaphragm. In addition, the one that adopts the piston structure is
No. 7254 has been proposed.

[0003]

In the case of the diaphragm structure, the suction force is adjusted by adjusting the pressing force of a spring for urging a valve rod to which the diaphragm is attached. Generally, this operation is performed by rotating the dial. However, there is a problem that the dial is subjected to a force due to the pressing force of the spring, and it is difficult to obtain a smooth rotation. Also in the invention employing the piston structure disclosed in Japanese Patent Publication No. 4-7254, the piston position is adjusted by adjusting the pressing force of a spring that biases the piston. Had similar problems.

[0004]

The suction adjuster of the present invention has an adjuster cover attached to one side of a suction adjuster body having a suction port and a discharge port, and a dial body attached to the other side. A lateral hole is provided through the suction adjuster main body, and a valve rod is mounted in the lateral hole so as to be airtight and freely adjustable in position. A flow path that communicates the lateral hole and the discharge port, and a flow path that communicates the suction port and a piston chamber formed inside the regulator cover are provided. A channel communicating with the side is provided. A piston is mounted on the regulator cover, and a tip of the piston is inserted into the lateral hole, and a valve is constituted by a tip surface of the piston and a tip of the valve rod. The piston is provided with a pressure adjusting spring for urging the piston toward the side hole and an auxiliary spring for urging the piston to the opposite side. The position of the valve rod is adjusted, the valve is opened and closed, and the suction pressure is adjusted. Is adjusted. According to a second aspect of the present invention, the valve rod is screwed to the inner wall of the lateral groove of the suction adjuster body, the base end is fixed to the dial body, and the position of the valve rod can be adjusted by rotating the dial body. According to the third aspect of the present invention, the valve rod is provided with a stopper convex portion in an annular shape, and the stopper convex portion is located in a concave portion formed in an annular shape in the base end portion of the suction adjuster main body, so that the movement range of the valve rod is increased. It is intended to be regulated.

[0005]

When the distal end of the valve rod is in close contact with the distal end surface of the piston, the suction pressure is 0. When the valve rod is moved away from the piston, the distal end of the valve rod separates from the distal end surface of the piston. Since a gap is created, suction is started. Since the piston chamber is depressurized by the start of suction, the piston moves to the valve rod side, is brought into an equilibrium state with the adjusted pressure, and suction at a constant pressure is continued. If the gap between the piston and the valve rod is maximized, it is possible to cope with the maximum suction pressure in the external system.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An adjuster cover 2 is mounted on one side of a suction adjuster main body 1, and a hexagon nut 3 is screwed on the other side, and a dial body 4 is mounted on the hexagon nut 3. is there. The suction adjuster main body 1 has a horizontal hole 5 penetrated therein. A valve rod 6 is hermetically mounted in the horizontal hole 5, and the base end of the valve rod 6 is dialed by inserting the hexagon nut 3 therethrough. It extends into the body 4. On the inner wall of the suction adjuster body 1 on the dial body 4 side, a stopper recess 7 whose dial body side is open is formed in an annular shape, and a screw is formed in the stopper recess 7. On the other hand, a stopper protrusion 8 is formed in the valve rod 6 in an annular shape.
And a screw is screwed into the stopper recess 7. The open end of the stopper recess 7 is closed by a hexagon nut 3, and the movement of the valve rod 6 in the direction of the adjuster cover is restricted by the distal end of the stopper projection 8 abutting against the wall of the stopper recess 7, and the dial is stopped. To move to the body side, the base end side of the stopper projection 8 is a hexagon nut 3
Is regulated by contacting the inner surface of the The base end of the valve rod 6 is fixed by a set screw 9 incorporated in the dial body 4. When the dial body 4 is rotated, the valve rod 6 rotates, and the screw 8 of the valve rod and the screw of the stopper recess 7 are connected. By the engagement, the valve rod 6 moves in the lateral hole 5. Reference numeral 10 in the figure denotes a groove for locking a tool (driver) for adjusting the position of the valve rod 6.

The interior of the adjuster cover 2 is a piston chamber 11, and a piston 12 is mounted. The distal end of the piston 12 is inserted into the lateral hole 5, and the distal end surface contacts the distal end of the valve rod 6. The valve is constituted by the distal end of the valve rod 6 and the distal end surface of the piston 12. There is a gap between the piston 12 and the lateral hole 5 so that a flow path is formed. A spring receiver 13 is formed at the base of the piston 12, and a pressure adjusting spring 14 for urging the piston 12 toward the adjuster cover 2 is mounted between the spring receiver 13 and the suction adjuster body 1. And
An auxiliary spring 15 for urging the piston 12 toward the valve rod 6 is mounted between the spring receiver 13 and the regulator cover 2.

The suction adjuster body 1 has a hose port 16 serving as a suction port for connecting a catheter or the like, and an opening / closing valve 1 serving as a discharge port for connecting an external system (suction device) 17.
8 are provided. The suction regulator main body 1 is provided with a flow path 19 communicating from the hose port 16 to the piston chamber 11, and the valve rod 6 is provided with a flow path 20 communicating from the end facing the piston chamber to the outer wall. And a flow path 21 communicating with the suction adjuster body 1 from the flow path 20 to the on-off valve 18.
Is provided so that the hose port 16 can communicate with the on-off valve 18. In the figure, reference numeral 22 denotes a pressure gauge, and 23 denotes a detachable dial plate.

Hereinafter, the operation of the suction adjuster A configured as described above will be described. When the load on the suction adjuster A is zero, the valve rod 6 is adjusted so that the distal end thereof comes into contact with the distal end surface of the piston 12 in an airtight manner. When the distal end of the valve rod 6 is in contact with the distal end surface of the piston 12, the flow from the hose port to the on-off valve 18 is closed by this contact, so that the suction pressure of the external system 17 is cut off, The suction pressure at the mouth side is 0, and no suction is performed.

When adjusting the suction pressure, the hose port 16 is closed and the dial body 4 is rotated counterclockwise. When the dial body 4 is rotated counterclockwise, the valve rod moves toward the dial body (right side in the figure) by the engagement of the screw 8, and the tip of the valve rod 6 separates from the tip end surface of the piston 12, and a gap is generated. The acting suction pressure is displayed on the pressure gauge 22. With this display, the position of the valve rod 4 is set in accordance with a desired suction pressure. At this time, since the flow path from the hose port 16 to the on-off valve 18 is open, when a catheter or the like is connected to the hose port 16, suction starts. Based on the adjusted pressure, suction at a constant pressure continues.

The suction pressure varies depending on the size of the gap between the valve rod 6 and the end face of the piston 12. If the gap is maximized, a suction pressure up to the limit of the suction pressure of the external system can be obtained. The moving range of the valve rod 6 is regulated by the locking recess 7 of the suction adjuster main body 1. Since this movement range corresponds to the width of the annular concave portion 20a formed in the flow path 20 of the valve rod 6, even if the position of the valve rod changes due to a change in the set suction pressure, the fluid sucked by the valve rod 6 Flows smoothly from the flow path 20 to the flow path 21, and no error occurs between the adjusted suction pressure and the actual suction amount.

In the above embodiment, the valve rod 6 is moved by screwing the valve rod 6 with the inner wall of the adjuster main body 1. However, the valve rod 6 may be screwed into the hole of the hexagon nut 3. it can. Further, although the piston 12 is held by the two springs 14 and 15, it is also possible to use only one spring.

[0013]

According to the present invention, the suction pressure is adjusted by adjusting the position of the valve rod, but the valve rod is not affected by the spring unlike the conventional diaphragm system. Therefore, the valve rod rotates smoothly by rotating the dial body, so that the pressure adjustment can be performed smoothly. Therefore, the adjustment is quick and the fine adjustment is easy. In addition, the number of parts is smaller than that of the conventional diaphragm system, and adjustment at the time of assembling is almost unnecessary, so that the cost can be reduced and the size can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a front view of the same.

[Explanation of symbols]

 A Suction Adjuster 1 Suction Adjuster Main Body 2 Adjuster Cover 3 Hex Nut 4 Dial Body 5 Side Hole 6 Valve Rod 7 Stopper Recess 8 Stopper Convex 9 Set Screw 10 Groove 11 Piston Chamber 12 Piston 13 Spring Receiver 14 Pressure Adjusting Spring 15 Auxiliary spring 16 Hose port 17 External system 18 On-off valve 19 Flow path 20 Flow path 21 Flow path 22 Pressure gauge 23 Dial plate

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[Procedure amendment]

[Submission date] November 8, 1999 (1999.11.
8)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (3)

[Claims] An adjuster cover is attached to one side of a suction adjuster body having a suction port and a discharge port, and a dial body is mounted on the other side. A lateral hole passes through the suction adjuster body. A valve rod is mounted in this side hole in a gas-tight and position-adjustable manner, and is formed inside the flow path communicating the side hole and the discharge port, and inside the suction port and the regulator cover. A flow path communicating with the piston chamber is provided, the valve rod is provided with a flow path communicating from a distal end surface thereof to a discharge port side, and a piston is mounted on the regulator cover. Is inserted into the lateral hole, and constitutes a valve with the distal end surface of the piston and the distal end of the valve rod. The piston is provided with a spring that elastically holds the valve, and the position of the valve rod is adjusted. Adjust, open and close the valve, and thus the suction pressure It was to adjust, medical suction regulator 2. The valve rod is screwed to an inner wall of a lateral groove of a suction adjuster body, and a base end portion is fixed to a dial body so that the position of the valve rod can be adjusted by rotation of the dial body. Item 1. The medical suction adjuster according to Item 1. 3. The valve rod has a stopper convex portion provided in an annular shape, and the stopper convex portion is located in a concave portion formed in an annular shape at a base end portion of the suction adjuster main body, and regulates a moving range of the valve rod. The medical suction adjuster according to claim 1 or 2, wherein