JP2006305294A - Electromagnetic valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure to open and close a passage in an electromagnetic valve, and to cool the electromagnetic solenoid and reduce the operating noise and the size. <P>SOLUTION: The electromagnetic valve has a cylindrical housing 12, an electromagnetic solenoid 14 provided coaxially in the housing, and a movable valve 16 displaced by the operation of the electromagnetic solenoid. The housing has first, second, and third openings 24, 26, 28, respectively provided on the first and second end walls and a cylindrical wall. The movable valve has a rod 42 which penetrates through a through-hole along an axial line of the electromagnetic solenoid, an armature 44 which is fixed on the rod and is attracted by the electromagnetic solenoid, and first and second valve elements 46, 48 mounted on the rod. The valve elements displace between a first position, where the first opening communicates with the third opening, when the first valve element opens the first opening, and the second valve element closes the second opening and a second position where the second opening communicates with the third opening, when the first valve element closes the first opening, and the second valve body opens the second opening. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a solenoid valve, and in particular, a pneumatic massage tool that is attached around a human upper limb, a lower limb, and the like and expands and contracts by supplying and discharging pressurized air, and the pneumatic massage device. The present invention relates to a small solenoid valve suitable for use in a pneumatic massager having a source of pressurized air to the device (air pump) and having a massager body placed near a pneumatic massager wearer.

Pneumatic massagers are usually equipped with a plurality of airtight chambers, each of which is inflated and contracted by supplying and discharging pressurized air, and the number of massager bodies according to the number of airtight chambers. Each of the solenoid valves and the corresponding airtight chamber are communicated by separate hoses, and supply of pressurized air to the airtight chamber and discharge of the pressurized air from the airtight chamber via the solenoid valve To be done. (See Patent Document 1)
JP 2000-189477 A

For this reason, a hose corresponding to the number of airtight chambers is provided between the pneumatic massager worn by the user and the massager body, which makes handling difficult. Further, when exhausting from the hermetic chamber, the air exhausted from the hermetic chamber is conducted through the electromagnetic valve of the massager body, so that rapid exhaust is difficult due to the flow path resistance in the hose to the electromagnetic valve. Therefore, if the solenoid valve is provided not on the massager body but on the pneumatic massager attached to the human body, the flow resistance can be eliminated, and the number of hoses can be one hose instead of many. It becomes possible.
In this case, the solenoid valve is required to be small and light. It is also desirable to suppress the temperature rise of the electromagnetic solenoid and the operating noise that occur during operation.
An object of the present invention is to provide a solenoid valve that meets such requirements.

That is, the present invention
A cylindrical wall, first and second end walls closing both ends of the cylindrical wall, a first opening penetrating the first end wall, a second opening penetrating the second end wall, the first and second ends A housing having a third opening extending through the cylindrical wall at a position between the walls;
An electromagnetic solenoid provided coaxially with the housing in the housing;
An armature, and a movable valve having a first valve body and a second valve body, wherein the armature is attracted by the operation of the electromagnetic solenoid and displaced in the axial direction of the cylindrical wall. A first position where the body opens the first opening and the second valve body closes the second opening to bring the first opening and the third opening into communication; and the first valve body opens the first opening. A movable valve that is displaceable between a second position where the second valve body closes and the second valve body opens the second opening and the second and third openings communicate with each other;
Have
The second valve body has a flexible valve seat engaging portion configured to expand outward in the radial direction toward the second opening in the displacement direction of the movable valve, and the movable valve is in the second position. The flexible valve seat engaging portion is elastically deformed so as to expand radially by engaging with the valve seat around the second opening so as to approach a predetermined position with respect to the valve seat. An electromagnetic valve is provided.

  When this solenoid valve is used in, for example, the pneumatic massager as described above, the first opening is connected to an air pump as a pressurized air source, the second opening is an exhaust port communicating with the atmosphere, and the third opening Is connected to a hermetic chamber of a pneumatic massage device that is attached to a human upper limb or lower limb and expands and contracts when pressurized air is supplied and discharged to perform a massage action.

  When the movable valve is in the first position, pressurized air is supplied to the airtight chamber through the first opening and the third opening to inflate the pneumatic massage device, and when the movable valve is in the second position, The supply of the pressurized air is cut off, the pressurized air is discharged from the airtight chamber to the outside through the third and second openings, and the pneumatic massage device contracts.

  In this solenoid valve, since the second valve body has the flexible valve seat engaging portion as described above, the compression allowance of the valve seat engaging portion with respect to the valve seat can be increased.

  That is, the valve seat engaging portion is generally annular so as to engage with the valve seat, and the radial cross section is usually semicircular. In such a case, when the valve seat engaging portion engages with the valve seat, it is elastically deformed to some extent by the pressing force against the valve seat, but the compression margin, that is, the size that is elastically deformed by being pressed by the valve seat is excessive. I can't make it bigger.

  In order to reliably supply the pressurized air to the hermetic chamber of the massager, it is necessary to securely close the second opening as the exhaust port. For this reason, it is necessary to push the valve seat engaging portion against the valve seat. It is necessary to make the electromagnetic solenoid for applying pressure as large as possible, which is an obstacle to miniaturization for mounting on the pneumatic massage device described above.

  On the other hand, in the present invention, the compression allowance of the valve seat engaging portion can be increased. In other words, the valve seat engaging portion can be engaged with the valve seat with compression deformation with a small pressing force. And a proper sealing engagement with the valve seat is possible. For this reason, the electromagnetic solenoid can be made small and light, so that the intended purpose described above can be achieved.

  In addition, since the electromagnetic solenoid is housed in the housing, the size of the electromagnetic valve can be reduced in this respect as well.

  Furthermore, in this solenoid valve, when it is actuated, pressurized air flows through the housing in which the solenoid solenoid and the movable valve are housed, so that the solenoid valve is forcibly cooled, and the armature Leakage of collision sound to the outside can be suppressed.

More specifically, the solenoid valve according to the present invention includes:
A spring member for biasing the movable valve toward the second position;
The movable valve has a rod extending through a through hole along the axis of the electromagnetic solenoid;
The armature is fixed to the first valve body side of the electromagnetic solenoid, and when the electromagnetic solenoid is energized, the armature is attracted and engaged with the end face of the electromagnetic solenoid so that the movable valve is in the first position. it can.

  That is, when the armature is attracted by actuating the electromagnetic solenoid, if the armature is not engaged with the end face of the electromagnetic solenoid and stops in a state where a gap is opened, the magnetic adsorption force of the electromagnetic solenoid to the armature is the maximum Therefore, there is a possibility that the movable valve is pushed back by the reaction force. That is, the armature is desirably engaged with the end face of the electromagnetic solenoid in a state where the movable valve is in the first position and the second valve body is engaged with the valve seat. However, it is difficult to make the armature in such a state due to accumulation of manufacturing errors due to assembly of the armature and the movable valve body. In such a case, the normal method is to increase the magnetic attraction force to the armature with a large electromagnetic solenoid and increase the compression allowance of the valve seat engaging portion of the second valve body to the valve seat. It is necessary to absorb the accumulation of errors.

  On the other hand, in the present invention, since the valve seat engaging portion of the second valve body is as described above, the armature moves to the end face of the electromagnetic solenoid when the movable valve is in the first position without enlarging the electromagnetic solenoid. Can be engaged.

The present invention basically includes the following:
A movable valve including a valve body that opens and closes a flow path surrounded by the valve seat by engaging and disengaging the valve seat;
An electromagnetic solenoid for displacing the movable valve so that the valve body engages and disengages with the valve seat;
A solenoid valve having
The valve body has a flexible valve seat engaging portion that is configured to expand outward in the radial direction as the valve body moves toward the valve seat in the displacement direction of the movable valve, and the valve body approaches and engages with the valve seat. When the valve seat engaging portion is engaged with the valve seat, the electromagnetic valve is elastically deformed so as to expand in the radial direction, and is brought close to a predetermined position with respect to the valve seat. .

  That is, reliable sealing engagement of the movable valve with the valve seat in the electromagnetic valve is not limited to the above-described pneumatic massage device, but is required. In the present invention, this is made possible by making the valve body as described above.

  As described above, the electromagnetic valve according to the present invention can be applied to the valve seat of the movable valve body by improving the form of the valve seat engaging portion of the movable valve body without increasing the size of the electromagnetic solenoid. Engagement can be ensured properly. Accordingly, it is possible to provide a solenoid valve that is small and light and suitable for use in a pneumatic massager that is attached to the human body as described above.

  Furthermore, the configuration in which the movable valve and the electromagnetic solenoid are set inside the housing enables a small electromagnetic valve, and the effects such as the sound insulation of the operation sound and the forced cooling of the electromagnetic solenoid by the air flowing inside the housing. Can also play.

  Hereinafter, an embodiment of a solenoid valve according to the present invention will be described with reference to the accompanying drawings.

  The illustrated electromagnetic valve 10 has a cylindrical housing 12, an electromagnetic solenoid 14 provided in the housing, and a movable valve 16 provided in the housing 12 and displaced in the axial direction of the housing by the operation of the electromagnetic solenoid. is doing.

  The housing 12 has a cylindrical wall 18, a first end wall 20, and a second end wall 22. A first opening 24 is provided in the first end wall 20, a second opening 26 is provided in the second end wall, and a third opening 28 is provided in the cylindrical wall 18 so as to penetrate each.

  This solenoid valve is used, for example, in a pneumatic massager (not shown). The first opening 24 communicates with a pump of the massager, and the third opening 28 supplies pressurized air from the pump. The second opening 26 is in communication with the atmosphere, and the second opening 26 is in communication with an airtight chamber for expanding and contracting the massage device upon receiving the discharge.

  In the illustrated example, a check valve 30 is attached to the first end wall 20 of the housing 12, and the first opening 24 is communicated with the pump via the check valve 30. That is, the check valve 30 is a conical shape that is coaxially attached to a cylindrical housing 32 that is coaxially connected to the housing 12 and a pump communication opening 34 provided in an end wall of the cylindrical housing 32. And a check valve member 36 (FIG. 2). The check valve member 36 is formed of a flexible member such as rubber. When the pressure on the pump side is lower than the hermetic chamber in the state shown in FIG. 2, the tip portion closes and the air passage passes through the inside. When the pressurized air from the pump is passed in the state shown in FIG. 1, the air passage is opened.

  In the housing 12, an annular coil support wall 40 is formed on the inner surface of the cylindrical wall 18, and the electromagnetic solenoid 14 is coaxially fixed to the housing 12. As shown in FIG. 3, the coil support wall 40 is provided with a pair of vent holes 41 so as to penetrate therethrough.

  The movable valve 16 includes a rod 42 extending through a through-hole along the axis of the electromagnetic solenoid, and a disc-like shape fixed to the rod 42 on the first opening 24 side of the electromagnetic solenoid 14 from a magnetic material such as iron. The armature 44 to be formed, and a first valve body 46 and a second valve body 48 provided at both ends of the rod 42 are configured. The first valve body 46 is formed of a tubular valve body holding member 52 having a flange 50 at the left end thereof fitted to the end portion of the rod 42, and a flexible material such as rubber fitted around the flange 50. It consists of the disc-shaped valve member 54 as a whole. The valve member 54 has a valve seat engaging portion 56 that protrudes in an annular shape on the surface facing the first opening 24 and has a substantially semicircular radial cross section. The second valve body 48 includes a valve body holding body 58 similar to the valve body holding material 52 of the first valve body 46, but is provided with a spring receiving portion 59 and compressed between the second end wall 22. The spring 60 is held and the movable valve 16 is urged toward the first end wall. The second valve body 48 also includes a valve member 62 similar to that of the first valve body 46, but a valve seat engaging portion 64 provided on a surface facing the second end wall 22 is provided on the second end wall 22. It becomes a conical shape which spreads radially outward as it goes.

  The electromagnetic valve 10 has the above-described configuration. When the electromagnetic solenoid 14 is not energized, the movable valve 16 is brought to the position shown in FIG. 2 by the compression spring 60, and the annular protrusion of the first valve body 46. 56 is pressed by the first end wall 20 to close the first opening 24, and the second valve body 48 is separated from the second end wall 22 to open the second opening 26. Accordingly, at this time, the supply of pressurized air from the pump is stopped, and the pressurized air in the hermetic chamber of the massager is exhausted through the third opening 28 and the second opening 26.

  On the other hand, when the electromagnetic solenoid 14 is energized, the armature 44 is attracted to the end face of the electromagnetic solenoid 14 by the magnetic force generated thereby, moving the movable valve 16 toward the second end wall, and the state shown in FIG. To do. In this state, the annular valve seat engaging portion 64 of the second valve body 48 is pressed while being elastically deformed to the inner surface of the second end wall 22 around the second opening 26 (that is, the valve seat). The first valve body 46 is separated from the first end wall 20 and the first opening 24 is opened. Accordingly, at this time, the supply of pressurized air from the pump is supplied to the hermetic chamber of the massager through the first opening 24 and the third opening 28.

  By periodically energizing the electromagnetic solenoid 14, the movable valve 16 is reciprocated, and the supply and exhaust of pressurized air to the airtight chamber of the massager are periodically performed. The check valve member 36 prevents the pressurized air from flowing backward from the airtight chamber to the pump side.

As can be seen from the above, in the illustrated electromagnetic valve, the valve member of the second valve body 48 is formed of a flexible material such as rubber, and the valve seat around the second opening 26 (that is, the inner surface of the second end wall). ) And the valve seat engaging portion 64 of the second valve body that opens and closes the second opening 26 by engaging and releasing the engagement is formed in a conical shape that expands in the radial direction toward the second end wall. The compression allowance of the valve seat engaging portion 64 when the second opening closed position shown in FIG. 1 is set is large, and therefore the armature 44 is set so as to be completely attracted and adhered to the electromagnetic solenoid 14, and the second It is easy to set the valve body so as to properly close the second opening 26.

It is a vertical side view which shows one Embodiment of the solenoid valve which concerns on this invention. In the electromagnetic valve of FIG. 1, it is a vertical side view which shows the state by which the movable valve was displaced. FIG. 3 is a sectional view taken along line III-III in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Solenoid valve 12 Housing 14 Electromagnetic solenoid 16 Movable valve 18 Cylindrical wall 20 1st end wall 22 2nd end wall 24 1st opening 26 2nd opening 28 3rd opening 30 Check valve member 32 Cylindrical housing 34 Pump communication opening 36 Conical check valve member 40 Coil support wall 41 Ventilation hole 42 Rod 44 Armature 46 First valve body 48 Second valve body 50 Flange 52 Valve body holding material 54 Valve member 56 Valve seat engaging portion 58 Valve body holding body 59 Spring receiving portion 60 Compression spring 62 Valve member 64 Valve seat engaging portion

Claims (3)

A cylindrical wall, first and second end walls closing both ends of the cylindrical wall, a first opening penetrating the first end wall, a second opening penetrating the second end wall, the first and second ends A housing having a third opening extending through the cylindrical wall at a position between the walls;
An electromagnetic solenoid provided coaxially with the housing in the housing;
An armature, and a movable valve having a first valve body and a second valve body, wherein the armature is attracted by the operation of the electromagnetic solenoid and displaced in the axial direction of the cylindrical wall. A first position in which the body opens the first opening and the second valve body closes the second opening so that the first opening and the third opening are in communication with each other; and A movable valve that is displaceable between a second position that closes one opening and the second valve body opens the second opening to bring the second and third openings into communication;
Have
The second valve body has a flexible valve seat engaging portion configured to expand outward in the radial direction toward the second opening in the displacement direction of the movable valve, and the movable valve is in the second position. The movable valve seat engaging portion is engaged with the valve seat around the second opening so as to be elastically deformed so as to expand in the radial direction so as to approach a predetermined position with respect to the valve seat. A solenoid valve characterized by that. A spring member for urging the movable valve toward the second position;
The movable valve has a rod extending through a through hole along the axis of the electromagnetic solenoid;
The armature is fixed to the first valve body side with respect to the electromagnetic solenoid, and when the electromagnetic solenoid is energized, it is attracted and engaged with the end face of the electromagnetic solenoid, and the movable valve is set to the first position. The electromagnetic valve according to claim 2. A movable valve including a valve body that opens and closes a flow path surrounded by the valve seat by engaging and disengaging the valve seat;
An electromagnetic solenoid for displacing the movable valve so that the valve body engages and disengages with the valve seat;
A solenoid valve having
The valve body has a flexible valve seat engaging portion that is configured to expand outward in the radial direction toward the valve seat in the displacement direction of the movable valve, and the valve body approaches and engages with the valve seat. In this case, the valve seat engaging portion engages with the valve seat and is elastically deformed so as to expand in the radial direction so as to approach a predetermined position with respect to the valve seat.

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