JP5898966B2 - solenoid valve - Google Patents

Description

  The present invention relates to an electromagnetic valve used for switching a flow path of a washer liquid in a window washer device of an automobile.

  FIG. 3 shows an example of the solenoid valve. The solenoid valve 1 includes a valve body 2 having a valve chamber 2a, a valve body 3 disposed in the valve chamber 2a, and a valve holder 4 for holding the valve body 3. A coil spring 6 that urges the valve holder 4 downward, a pipe member 7 that extends upward from the valve chamber 2a, an attractor 8 that surrounds the pipe member 7, and an electromagnetic coil that surrounds the attractor 8. 9 and a housing 11 for accommodating the electromagnetic coil 9.

  The valve body 2 is made of resin and has a valve chamber 2a and a valve seat 2b that open upward, and the valve body 3 is accommodated in the valve chamber 2a. An outflow pipe 13 and an inflow pipe 14 are integrally provided on the lower surface and side surface of the valve body 2, and the valve chamber 2 a communicates with an outlet port 13 a inside the outflow pipe 13 and an inlet port 14 a inside the inflow pipe 14. In addition, it communicates with the outlet port 7 a inside the pipe member 7. The upper end portion of the valve body 2 is joined to the lower end portion of the mold 15 by ultrasonic welding (joint portion 18).

  The valve body 3 is formed of an elastic body such as rubber or resin, and has a flat ceiling surface and a space that opens downward, and a step portion is formed on the outer peripheral surface of the valve body 3.

  The valve holder 4 is made of a magnetic material, and holds a step portion formed on the outer peripheral surface of the valve body 3 at the lower end portion. Further, the valve holder 4 has a plurality of through holes 4a penetrating in the horizontal direction.

  The coil spring 6 as an urging member is interposed between the central lower surface 15a of the mold 15 and the valve holder 4, and urges the valve holder 4 downward at all times.

  The pipe member 7 extends upward from the valve chamber 2a of the valve body 2, and the internal outlet port 7a communicates with the valve chamber 2a via the outflow port 7b.

  The attractor 8 surrounds the pipe member 7 and is provided for attracting the valve holder 4 and the valve body 3 by exciting the electromagnetic coil 9.

  The electromagnetic coil 9 is disposed so as to surround the attractor 8, and the periphery of the electromagnetic coil 9 is sealed with a mold 15. A terminal 16 for supplying power to the electromagnetic coil 9 is provided on the upper right portion 15 b of the mold 15.

  The plate 12 is made of a magnetic material having a uniform thickness, and is insert-molded into the mold 15.

  The housing 11 is made of a magnetic material, is mounted so as to cover the mold 15, and is caulked and fixed to the plate 12 as will be described later.

  In the electromagnetic valve 1 having the above configuration, when the electromagnetic coil 9 is not excited, the valve holder 4 integrated with the valve body 3 is urged downward by the coil spring 6, so that the valve body 3 is also moved downward. It is urged to contact the valve seat 2b of the valve body 2, the outlet port 13a is closed, and the outlet port 7a is opened.

  On the other hand, when the electromagnetic coil 9 is energized, the valve holder 4 integrated with the valve body 3 is attracted by the attractor 8 and moves upward. With this, the valve body 3 also moves upward and the pipe member 7 The outlet 7b is closed, the outlet port 7a is closed, and the outlet port 13a is opened.

  However, in the electromagnetic valve 1 shown in FIG. 3, the housing 11 is caulked and fixed to the plate 12 as shown in FIG. 4 (FIG. 4 (c) is a portion C showing a state before caulking. 4 (a) and 4 (b) show the state after caulking). At this time, the projection 12a of the plate 12 is bent and fixed in the center direction of the electromagnetic valve 1, and a housing is used with a jig. It has been necessary to perform a caulking operation while pressing so that 11 and the suction element 8 (see FIG. 3) are in contact with each other. Therefore, depending on the accuracy of the parts and jigs, as shown in FIG. 4D, a gap C is generated between the ceiling 11a of the housing 11 and the upper end of the suction element 8, and the suction element 8, the housing 11, The efficiency of the magnetic circuit composed of the plate 12 and the valve holder 4 may be reduced.

  Accordingly, the present invention has been made in view of the problems in the above-described electromagnetic valve, and an object thereof is to prevent a reduction in the efficiency of the magnetic circuit of the electromagnetic valve.

To achieve the above object, the present invention provides a solenoid valve having a valve body communicating with each of an inlet port and a first outlet port, a valve body disposed in the valve chamber, A valve holder made of a magnetic material that holds the valve body, a biasing member that biases the valve holder toward the first outlet port, and a second outlet port that communicates with the valve chamber, a pipe member that extends upwardly from the valve chamber, and a suction element surrounding the pipe member, and an electromagnetic coil surrounding the suction element consists of magnetic material, it is disposed facing the side surface of the valve holder A plate having a protrusion protruding outward in the radial direction of the pipe member, and a housing made of a magnetic material that accommodates the electromagnetic coil and is in contact with the upper end of the attractor. Taper shape that becomes wider toward the bottom A housing having a tapered portion the protrusion of the plate while being formed is fixed by caulking, by energizing the electromagnetic coil, wherein the valve body the valve holder is attracted to the attractor of the pipe member By closing the second outlet port and de-energizing the electromagnetic coil, the valve holder is urged by the urging member, and the valve body closes the first outlet port. .

  According to the present invention, the caulking force applied when the plate and the housing are caulked and fixed has a vector component in a direction in which the housing abuts on the upper end of the suction element. Disperse and the housing is pulled toward the valve body. As a result, the housing and the attractor can be caulked while making sure contact with each other, and the efficiency of the magnetic circuit of the solenoid valve can be prevented from decreasing.

In the solenoid valve, the tapered portion of the housing is continuous with the side surface of the housing in a direction perpendicular to the axial direction of the pipe member, and is bent in a direction close to the pipe member with respect to the side surface of the housing. The whole protrusion part of the said plate can be located in the said pipe member side rather than the extended surface of the side surface of the said housing in the radial direction of the said pipe member . This can prevent the caulking portion of the plate from interfering with surrounding members.

  As described above, according to the present invention, it is possible to prevent a decrease in the efficiency of the magnetic circuit of the electromagnetic valve.

(A), (b) is the front view and bottom view which show 1st Embodiment of the solenoid valve based on this invention which has the structure shown in FIG. 3, Comprising: (c) is the housing of this solenoid valve. Schematic for demonstrating the method of crimping and fixing to a plate, (d) is sectional drawing which shows the ceiling part of the housing after crimping fixation, and the upper end part of a suction element. (A), (b) is the front view and bottom view which show 2nd Embodiment of the solenoid valve based on this invention which has the structure shown in FIG. 3, Comprising: (c) is the housing of this solenoid valve. It is the schematic for demonstrating the method of crimping and fixing to a plate. It is sectional drawing which shows this invention and the conventional solenoid valve. (A), (b) is the front view and bottom view of the conventional solenoid valve which has the structure shown in FIG. 3, Comprising: (c) demonstrates the method of crimping and fixing the housing of this solenoid valve to a plate. (D) is sectional drawing for demonstrating the problem which generate | occur | produces at the time of caulking fixation.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a first embodiment of an electromagnetic valve according to the present invention. The basic configuration and operation of the electromagnetic valve 21 are the same as those of the electromagnetic valve 1 shown in FIGS. As shown in c), the caulking portion 11b of the housing 11 with the plate 12 is different from the housing 11 shown in FIG. 4C only in that it is formed in a tapered shape that becomes wider downward.

With the above configuration, the caulking force F applied to the surface of the caulking portion 11b of the housing 11 by the projection 12a of the plate 12 acts perpendicularly to the surface of the caulking portion 11b. It has a force F _H and a component force F _V vertically downward. That is, the caulking force F has a vector component in a direction in which the ceiling portion 11 a of the housing 11 contacts the upper end portion of the suction element 8 in FIG. 3. Thereby, as shown in FIG.1 (d), the ceiling part 11a of the housing 11 and the upper end part of the suction element 8 contact | adhere, and the space | gap C as shown in FIG.4 (d) arises between both. Therefore, when the electromagnetic coil 9 is excited, the efficiency of the magnetic circuit composed of the attractor 8, the housing 11, the plate 12, and the valve holder 4 can be properly maintained.

  Next, a second embodiment of the electromagnetic valve according to the present invention will be described with reference to FIG.

  The basic configuration and operation of the electromagnetic valve 31 are the same as those of the electromagnetic valve 1 shown in FIGS. 3 and 4, but as shown in FIG. 2C, the caulking portion 11 c with the plate 12 of the housing 11 is Unlike the housing 11 shown in FIG. 4C, the only difference is that it is formed as an inclined surface bent along a fold line 11d inclined in the vertical direction.

  With the configuration described above, the caulking force applied to the surface of the caulking portion 11c of the housing 11 by the projection 12a that is the caulking portion of the plate 12 is similar to that of the electromagnetic valve 21 shown in FIG. 3, the ceiling 11 a of the housing 11 has a vector component in the direction in which the ceiling 11 a contacts the upper end of the suction element 8. As a result, as in the first embodiment described above, as shown in FIG. 1D, the ceiling 11a of the housing 11 and the upper end of the suction element 8 are in close contact with each other, and FIG. ), The efficiency of the magnetic circuit including the attractor 8, the housing 11, the plate 12, and the valve holder 4 can be properly maintained.

  Further, as shown in FIG. 2B, the protrusion 12 a of the plate 12 can be prevented from protruding from the side surface 11 e of the housing 11. Thereby, it can prevent that the projection part 12a of the plate 12 interferes with a surrounding member.

1, 21, 31 Electromagnetic valve 2 Valve body 2a Valve chamber 2b Valve seat 3 Valve body 4 Valve holder 4a Through hole 6 Coil spring 7 Pipe member 7a Outlet port 7b Outlet 8 Suction element 9 Electromagnetic coil 11 Housing 11a Ceiling 11b, 11c Caulking portion 11d Crease 11e Side surface 12 Plate 12a Projection portion 13 Outflow pipe 13a Outlet port 14 Inflow pipe 14a Inlet port 15 Mold 15a Central lower surface 15b Upper right portion 16 Terminal 18 Joint portion

Claims (2)

A valve body having a valve chamber communicating with each of the inlet port and the first outlet port;
A valve body disposed in the valve chamber;
A valve holder made of a magnetic material for holding the valve body;
A biasing member that biases the valve holder in the direction of the first outlet port;
A pipe member having a second outlet port communicating with the valve chamber and extending upward from the valve chamber;
A suction member surrounding the pipe member;
An electromagnetic coil surrounding the attractor ;
Made magnetic material, a plate disposed opposite to the side surface of the valve holder, a plate having a protrusion that protrudes outward in the radial direction of the pipe member,
A housing made of a magnetic material that accommodates the electromagnetic coil and abuts the upper end of the attractor. The housing is formed in a tapered shape that widens downward, and the protrusion of the plate is fixed by caulking. A housing having a tapered portion ;
By exciting the electromagnetic coil, the valve holder is attracted by the attractor, the valve body closes the second outlet port of the pipe member, and the excitation to the electromagnetic coil is released. An electromagnetic valve, wherein a valve holder is urged by the urging member, and the valve body closes the first outlet port. The tapered portion of the housing is provided so as to be continuous with the side surface of the housing in a direction perpendicular to the axial direction of the pipe member and to be bent in a direction close to the pipe member with respect to the side surface of the housing. the entire projecting portion of the plate, in the radial direction of the pipe member, the solenoid valve according to claim 1, characterized that you located on the pipe member side than the extension surface of the side of the housing.

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