WO2006106709A1

WO2006106709A1 - Electromagnetic valve

Info

Publication number: WO2006106709A1
Application number: PCT/JP2006/306417
Authority: WO
Inventors: Haruki Nakao
Original assignee: Nitto Kohki Co., Ltd.
Priority date: 2005-03-31
Filing date: 2006-03-29
Publication date: 2006-10-12
Also published as: JP2006305294A

Abstract

An electromagnetic valve, comprising a cylindrical housing (12), an electromagnetic solenoid (14) coaxially installed in the housing, and a movable valve (16) displaced by the operation of the electromagnetic solenoid. The housing comprises first, second, and third openings (24), (26), and (28) formed in the first and second end walls and the cylindrical wall of the housing. The movable valve comprises a rod (42) extending through a through-hole along the axis of the electromagnetic solenoid, an armature (44) fixed to the rod and attracted by the electromagnetic solenoid, and first and second valve elements (46) and (48) mounted on the rod. Also, the movable valve is formed to be displaceable between a first position where when the first valve element opens the first opening and the second valve element closes the second opening to communicate the first opening with the third opening and a second position where when the first valve element closes the first opening and the second valve element opens the second opening to communicate the second opening with the third opening. Thus, passages in the electromagnetic valve can be securely opened and closed, and the electromagnetic valve can be cooled and reduced in operating noise and size.

Description

Specification

solenoid valve

Technical field

TECHNICAL FIELD [0001] The present invention relates to a solenoid valve, and in particular, a pneumatic massage device that is attached around a human upper limb or lower limb and expands and contracts by supplying and discharging pressurized air to perform a massage action. And a pneumatic massage device having a pressurized air source (air pump) to the pneumatic massage device and having a massage device main body placed near the wearer of the pneumatic pine surge device. It relates to a solenoid valve.

Background art

[0002] In general, a pneumatic massager has a plurality of airtight chambers that expand and contract each by supplying and discharging pressurized air to the human body, and the massager body has the number of airtight chambers. A corresponding number of three-way solenoid valves are provided, and each solenoid valve and the corresponding hermetic chamber are communicated by separate hoses, and pressurized air is supplied to the hermetic chamber via the solenoid valve and pressurized from the hermetic chamber. Air is being discharged. (See JP 2000-18947 7)

Disclosure of the invention

Problems to be solved by the invention

[0003] 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. In addition, 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 solenoid valve. Therefore, if the solenoid valve is installed in the pneumatic massager that is 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.

In this case, the solenoid valve is required to be small and light. It is also desirable to suppress the temperature rise of electromagnetic solenoids that occur during operation and the operating noise.

An object of the present invention is to provide a solenoid valve that meets such requirements. Means for solving the problem

That is, the present invention provides:

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 A housing having a third opening passing through the cylindrical wall at a position between the end walls;

An electromagnetic solenoid provided coaxially with the housing in the housing; a first armature; and a first valve body and a second valve body; the armature is attracted by the operation of the electromagnetic solenoid; A movable valve that is displaced in the axial direction of the cylindrical wall, wherein the first valve body opens the first opening and the second valve body closes the second opening, and the first opening and the third opening A first position where the first valve body closes the first opening and a second valve body opens the second opening and the second position and the third opening communicate with each other. A movable valve that is displaceable between

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. Then, 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. Provided electromagnetic valve.

[0005] When this solenoid valve is used in a pneumatic massager as described above, for example, the first opening is connected to an air pump as a pressurized air source, and the second opening is an exhaust port communicating with the atmosphere. The third opening is connected to the airtight chamber of a pneumatic massage device that is worn on the upper and lower limbs of a human and expands and contracts when pressurized air is supplied and discharged to perform massage.

[0006] When the movable valve is in the first position, pressurized air is supplied to the hermetic chamber through the first opening and the third opening to inflate the pneumatic massage device, and the movable valve is in the second position. At that time, the supply of pressurized air is cut off, and pressurized air is discharged from the airtight chamber through the third and second openings to the outside, and the pneumatic massage device contracts.

In this electromagnetic 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. [0008] 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.

[0009] In order to reliably supply the pressurized air to the hermetic chamber of the massager, it is necessary to close the second opening as the exhaust port reliably. It is necessary to make the electromagnetic solenoid for applying the pressing force of the engaging part as large as possible, which is an obstacle to downsizing for mounting on the pneumatic massage device described above.

In contrast, in the present invention, the compression allowance of the valve seat engaging portion can be increased. In other words, the engagement of the valve seat engaging portion with the compression deformation of the valve seat engaging portion with a small pressing force. Thus, 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.

[0011] Further, since the electromagnetic solenoid is housed in the nosing, the size of the electromagnetic valve can be reduced in this respect as well.

[0012] Further, in this solenoid valve, when it is operated, the solenoid solenoid and the movable valve are housed, and pressurized air flows in the housing, so that the solenoid valve is forcibly cooled, Moreover, leakage of the armature collision sound to the outside can be suppressed.

[0013] More specifically, the solenoid valve according to the present invention is:

Having a panel 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, and when the armature is fixed to the first valve body side of the electromagnetic solenoid and the electromagnetic solenoid is energized, The movable valve can be brought into the first position by being attracted and engaged with the end face.

That is, when the armature is attracted by the operation of the electromagnetic solenoid, the armature is not engaged with the end face of the electromagnetic solenoid, and when the armature stops in a state where a gap is opened, the magnetic force of the electromagnetic solenoid with respect to the armature Adsorption power is not maximized and is therefore movable The valve may be pushed back by reaction force. That is, the armature is desired to be 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 the accumulation of manufacturing errors due to assembly of the armature and movable valve body. In such a case, the usual method is to increase the magnetic attraction force to the armature by using a large electromagnetic solenoid, and to increase the compression allowance of the valve seat engaging portion of the second valve body to the valve seat. Therefore, it is necessary to absorb the accumulation of manufacturing errors.

[0015] In contrast, in the present invention, the valve seat engaging portion of the second valve body is as described above, so that the armature is not moved when the movable valve is in the first position without increasing the electromagnetic solenoid. It can be engaged with the end face of the electromagnetic solenoid.

[0016] The present invention basically includes:

A movable valve provided with a valve body that opens and closes a flow passage 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 the valve seat;

A solenoid valve having

The valve body has a flexible valve seat engaging portion configured to expand radially outward 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. In this case, an electromagnetic valve is provided in which the valve seat engaging portion engages with the valve seat so as to approach a predetermined position with respect to the valve seat by a force S that is not elastically deformed so as to expand in the radial direction.

That is, a 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.

The invention's effect

[0018] As described above, the electromagnetic valve according to the present invention improves the shape of the valve seat engaging portion of the movable valve body without increasing the size of the electromagnetic solenoid, thereby providing a valve for the movable valve body. Engagement with the seat can be ensured properly. Accordingly, it is also 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. I can do it.

[0019] Further, the configuration in which the movable valve and the electromagnetic solenoid are set inside the housing also enables a small electromagnetic valve, and also allows the operation sound to be insulated and the electromagnetic current generated by the air flowing inside the housing. Effects such as forced cooling of the solenoid can also be achieved.

Brief Description of Drawings

FIG. 1 is a longitudinal side view showing an embodiment of a solenoid valve according to the present invention.

2 is a longitudinal side view showing a state in which the movable valve is displaced in the electromagnetic valve of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

Explanation of symbols

solenoid valve

12 Housing

14 Electromagnetic solenoid

16 Movable valve

18 cylindrical wall

20 First end wall

22 Second end wall

24 1st opening

26 2nd opening

28 3rd opening

30 Check valve member

32 Tubular housing

34 Pump communication opening

36 Conical check valve member

40 Coil support wall

41: ¾ port

42 rods,

44 Armature

46 1st disc 48 2nd disc

50 flange

52 Disc holder

54 Valve member

56 Valve seat engaging part

58 Disc holder

59 Panel receiver

60 compression panel

62 Valve member

64 Valve seat engagement part

BEST MODE FOR CARRYING OUT THE INVENTION

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

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

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

[0025] This solenoid valve is used, for example, in a pneumatic massager (not shown). The first opening 24 is in communication with the pump of the massager, and the third opening 28 is pressurized with a pumping force. The second opening 26 is in communication with the atmosphere, and is connected to an airtight chamber for expanding and contracting the massage device upon receiving and discharging air.

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 communicates with the pump via the check valve 30. . In other words, the check valve 30 is coaxially attached to a cylindrical sleeve and a housing 32 coaxially connected to the housing 12 and a pump communication opening 34 provided on an end wall of the cylindrical housing 32. And a conical check valve member 36 (FIG. 2). The check valve member 36 is formed of a flexible member such as rubber, and when the pressure on the pump side is lower than the hermetic chamber in the state shown in FIG. In the state shown in Fig. 1, the front end portion is closed and the air passage is blocked, and when the pressurized air from the pump is passed, 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.

[0028] The movable valve 16 includes a rod 42 extending through a through hole along the axis of the electromagnetic solenoid, and a disc-like iron or the like fixed to the rod 42 on the first opening 24 side of the electromagnetic solenoid 14. The armature 44 is also formed of a magnetic material force, and a first valve body 46 and a second valve body 48 provided at both ends of the rod 42. The first valve body 46 is fitted to the end of the rod 42 and has a cylindrical valve body holding member 52 having a flange 50 on the left end, and a flexible material force such as rubber fitted around the flange 50. As a whole, a disc-shaped valve member 54 is formed. 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 panel receiving portion 59 and is compressed between the second end wall 22. The panel 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 has a conical shape that spreads outward in the radial direction.

[0029] 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. The annular projection 56 of 46 is pressed by the first end wall 20 to close the first opening 24, and the second valve body 48 is also separated from the second end wall 22 to open the second opening 26. Therefore, 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, and the movable valve 16 is moved toward the second end wall. The state shown in Fig. 1 is assumed. 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). Thus, the second opening 26 is closed, 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.

[0031] By periodically energizing the electromagnetic solenoid 14, the movable valve 16 is reciprocated, and the supply and exhaust of pressurized air to the hermetic chamber of the pine surge device is periodically performed. The check valve member 36 prevents the pressurized air from flowing back from the airtight chamber to the pump side.

[0032] 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 (ie, the second valve body). The valve seat engaging part 64 of the second valve body that releases and engages with the inner surface of the end wall and opens and closes the second opening 26 has a conical shape that expands in the radial direction toward the second end wall. Therefore, the compression allowance of the valve seat engaging portion 64 when it is in the second opening closed position shown in FIG. 1 is large, so that the armature 44 is completely attracted to the electromagnetic solenoid 14 by suction. And the second valve body can be easily set so as to close the second opening 26 properly.

Claims

The scope of the claims

[1] 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 a housing having a third opening passing through the cylindrical wall at a position between the second end wall and

An electromagnetic solenoid provided coaxially with the housing in the housing; a first armature; and a first valve body and a second valve body; the armature is attracted by the operation of the electromagnetic solenoid; A movable valve that is displaced in the axial direction of the cylindrical wall, wherein the first valve body opens the first opening and the second valve body closes the second opening, and the first opening and the third valve A first position where the opening communicates, and the first valve closes the first opening and the second valve opens the second opening to communicate the second and third openings. A movable valve that is displaceable between the second position and

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. When the movable valve seat engaging portion engages with the valve seat around the second opening, the movable valve seat engaging portion is elastically deformed so as to expand in the radial direction so as to approach a predetermined position with respect to the valve seat. solenoid valve.

[2] having a panel 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 the electromagnetic solenoid is energized. The electromagnetic valve according to claim 2, wherein the movable valve is sometimes brought into the first position by being attracted and engaged with an end face of the electromagnetic solenoid.

[3] A movable valve including a valve body that opens and closes a flow passage surrounded by the valve seat by engaging and disengaging the valve seat;

A solenoid valve having

As the valve body moves in the direction of displacement of the movable valve and toward the valve seat, the valve body expands radially outward. A flexible valve seat engaging portion that is shaped like a ring, and when the valve body approaches and engages with the valve seat, the valve seat engaging portion engages with the valve seat in the radial direction. An electromagnetic valve that is elastically deformed so that it expands, and that it approaches a predetermined position relative to the valve seat.