JP6099689B2 - 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.

  Conventionally, as the electromagnetic valve, Patent Document 1 discloses that a valve body housed in a valve chamber having a valve seat and an outlet port is biased by a spring and is positioned on the valve seat to close the outlet port. It is described that when the coil is energized, it is suctioned against the spring to open the outlet port.

  In such an electromagnetic valve, for example, as shown in FIG. 9, an electromagnetic coil (not shown) is provided in a resin valve main body 82 having a valve chamber 82 a that houses a valve body 84 and a valve holder 85 that holds the valve body 84. In order to fix the housing 83 in which the housing 83 is housed, there is an electromagnetic valve 81 for caulking and fixing the lower edge 83a of the housing 83 directly to the valve body 82.

  Further, in another electromagnetic valve 91 shown in FIG. 10 having the same application as the electromagnetic valve 81, a resin valve body having a valve body 95 and a valve chamber 92a for accommodating a valve holder 96 for holding the valve body 95. After the plate 94 made of a magnetic material is assembled to the bottom of the valve main body 92, the lower edge 93 a of the housing 93 is caulked and fixed.

No. 6-49982

  However, in the conventional solenoid valve 81 shown in FIG. 9, stress is applied to the resin valve main body 82 where the lower edge 83a of the housing 83 is directly caulked and fixed, and cracks are generated by impact or vibration. There is a fear.

  Further, in the electromagnetic valve 91 shown in FIG. 10, the entire length of the housing 93 is increased and the plate 94 is located at a position away from the valve holder 96, so that an electromagnetic coil, an attractor (both not shown), the plate 94 and As a result of a weak magnetic field formed by the valve holder 96 and a weak magnetic force applied to the valve holder 96, there is a problem that a larger electromagnetic coil is required to close the outlet port with a predetermined force.

  Therefore, the present invention has been made in view of the problems in the above-described conventional solenoid valve, and there is no possibility that cracks will occur in the resin valve body due to impact or vibration, and the electromagnetic coil is made smaller than before. An object of the present invention is to provide a solenoid valve that can be used.

To achieve the above object, the present invention is an electromagnetic valve, which is a resin valve body having a valve chamber communicating with each of an inlet port and a first outlet port, and 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 in the direction of the first outlet port, and a second outlet port that communicates with the valve chamber. A pipe member extending upward from the valve chamber; and a suction member surrounding the pipe member and isolated from the inlet port, the first outlet port, the valve chamber, and the second outlet port When an electromagnetic coil surrounding the attractor, accommodating the electromagnetic coil, Ri Do a magnetic material, a housing having a plurality of openings, are said valve body integrally made of a magnetic material, said valve body A plurality of protrusions extending in a direction perpendicular to the moving direction of With a to that plate, the plate, while facing the side surface of the valve holder, each of the plurality of protrusions that are inserted into each of the plurality of openings formed in said housing, said valve body It is caulked and fixed to the housing in a state of being bent in a direction perpendicular to the moving direction, and the valve holder is attracted to the attractor by exciting the electromagnetic coil, so that the valve body is the pipe member. Closing the second outlet port and releasing the excitation to the electromagnetic coil, the valve holder is biased by the biasing member, and the valve body closes the first outlet port. And

  According to the present invention, since the lower edge portion of the housing is not directly caulked and fixed to the resin valve main body, there is no possibility of cracks occurring in the caulking fixing portion due to impact or vibration. In addition, since the plate made of a magnetic material for fixing the housing to the valve body is disposed to face the side surface of the valve holder, the magnetic field formed by the electromagnetic coil, the attractor, the valve holder, the plate and the housing becomes stronger, and the valve body Since the magnetic force applied to the holder can be increased, the valve body can be covered with a smaller electromagnetic coil when closing the outlet port with a predetermined force. Furthermore, by insert-molding the plate into the valve body, the electromagnetic valve can be assembled more easily, and the manufacturing cost of the electromagnetic valve can be reduced.

  As described above, according to the present invention, it is possible to provide an electromagnetic valve capable of reducing the size of an electromagnetic coil compared to the conventional one without causing a crack to occur in a resin valve body due to impact or vibration. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the solenoid valve concerning this invention, Comprising: (a) is sectional drawing, (b) is the sectional view on the AA line of (a) (However, in (a), it is a solenoid valve. (B) is drawn as if the whole is drawn). FIG. 2 is a cross-sectional view taken along line BB in FIG. 1B (however, FIG. 2 is drawn assuming that the whole solenoid valve is drawn in FIG. 1B). It is a front view of the solenoid valve of FIG. It is a top view which shows the plate insert-molded by the valve main body of the solenoid valve of FIG. It is a figure which shows the attractor of the solenoid valve of FIG. 1, Comprising: (a) is a top view, (b) is CC sectional view taken on the line of (a). It is a figure which shows the other example of the valve body and valve body holder of the solenoid valve of FIG. 1, Comprising: (a) is a top view, (b) is the DD sectional view taken on the line of (a). It is a figure which shows the other example of the valve body and valve body holder of the solenoid valve of FIG. 1, Comprising: (a) is a top view, (b) is the EE sectional view taken on the line of (a). It is the top view and sectional drawing which show the relationship between the valve seat of the valve main body of FIG. 1, and a valve body, Comprising: (a) shows the state before changing into an irregular shape, (b) and (c) are irregular shapes. It is a figure which shows the state changed into. It is a fragmentary sectional view showing an example of the conventional electromagnetic valve. It is a fragmentary sectional view showing an example of the conventional electromagnetic valve.

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

  1 to 3 show an embodiment of an electromagnetic valve according to the present invention. This electromagnetic valve 1 includes a valve body 2 having a valve chamber 2a, a valve body 3 disposed in the valve chamber 2a, A valve holder 4 that holds 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, and an aspirator 8 that surrounds the pipe member 7; The electromagnetic coil 9 surrounds the attractor 8, the housing 11 that houses the electromagnetic coil 9, the plate 12 that fixes the housing 11 to the valve body 2, and the like.

  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, the valve holder 4, and the coil spring 6 are accommodated in the valve chamber 2a. A plate 12 is integrated with the valve body 2 by insert molding. An outflow pipe 13 and an inflow pipe 14 are respectively connected to the lower surface and the 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. The pipe member 7 communicates with the outlet port 7a.

  The plate 12 to be insert-molded in the valve body 2 is made of a magnetic material having a uniform thickness. As shown in FIG. 4, one direction (the direction in which the inflow pipe 14 is connected) is open and has a recess 12b. A circular gap 12a is provided, and protrusions 12c are provided at four corners. As shown in FIG. 2, each protrusion 12c is inserted into the opening 11a of the housing 11 and fixed by caulking.

  The valve body 3 is formed in a disk shape, and is integrated with a valve holder 4 made of a magnetic material and formed in a disk shape concentric with the valve body 3 so as to surround a side surface of the valve body 3. The valve holder 4 has a plurality (12 in this embodiment) of through-holes 4a penetrating in the vertical direction.

  The coil spring 6 as an urging member is interposed between the lower end portion 15a of the mold 15 and the valve holder 4, and always urges the valve holder 4 downward.

  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. As shown in FIG. 5, the suction element 8 includes a cylindrical body 8a and a mold resin passage 8b.

  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 housing 11 is made of a magnetic material, and is mounted on the valve body 2 via the plate 12 so as to cover the mold 15. The housing 11 is provided with a mounting portion 17 for mounting the entire electromagnetic valve 1 to surrounding members.

  Next, a method for assembling the electromagnetic valve 1 will be described with reference to FIGS. 1 and 2.

  The plate 12 is insert-molded into the valve body 2, and the inflow pipe 14 is connected to the valve body 2 by, for example, ultrasonic welding (welded portion 14b). On the other hand, the valve holder 4 is integrated with the valve body 3.

  Further, one end of a terminal 16 is connected to a bobbin 10 in which an attractor 8 is insert-molded, and wound around the bobbin 10 to produce an electromagnetic coil 9. The electromagnetic coil 9 is sealed with resin to form a mold 15. . At this time, the pipe member 7 is simultaneously formed.

  Next, the valve body 3 and the coil spring 6 are inserted into the valve body 2, and the assembly in which the mold 15 is formed is positioned so as to cover the upper opening of the valve body 2. For example, the valve body 2 is formed by ultrasonic welding or the like. It sticks to. Then, when the housing 11 is mounted from above so as to surround the mold 15, and the protruding portion 12 c of the plate 12 is inserted into the opening 11 a of the housing 11 and fixed by caulking, the assembly of the electromagnetic valve 1 is completed.

  Next, operation | movement of the solenoid valve 1 which has the said structure is demonstrated. In the following description, the case where the electromagnetic valve 1 is used for switching the flow path of the washer liquid in the window washer device of the automobile will be described as an example. The washer liquid flowing in from the inflow pipe 14 passes through the pipe member 7. It is assumed that it is supplied to the rear window or to the rear camera (back monitor) via the outflow pipe 13.

  When the electromagnetic coil 9 is not excited, as shown in FIG. 1, 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 urged downward. Then, it contacts the valve seat 2b of the valve body 2, the outlet port 13a is closed, and the outlet port 7a is opened. As a result, the washer fluid flowing into the valve chamber 2a of the valve body 2 from the inlet port 14a is supplied to the rear window through the pipe member 7.

  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. As a result, the washer liquid flowing into the valve chamber 2a of the valve body 2 from the inlet port 14a is supplied to the rear camera through the outflow pipe 13.

  Next, another example of the valve body 3 and the valve body holder 4 of the electromagnetic valve 1 will be described with reference to FIGS.

  The valve body 23 and the valve holder 24 shown in FIG. 6 are both formed in a concentric disc shape and integrated. In the valve holder 24 made of a magnetic material, 12 through holes 24a are formed in the same manner as the through holes 4a formed in the valve holder 4 in the above embodiment. In addition, eight through holes 24b are formed by corrugating the inner diameter side of the valve holder 24.

  Even if the viscosity of the fluid to be handled rises within a range that does not affect the magnetic force required to attract the valve holder 24 by the suction element 8 by adding the through hole 24b, the operation of the valve holder 24 and the valve body 23 is performed. Can reduce the impact. The number of through holes 24a and 24b is not particularly limited.

  The valve body 33 and the valve holder 34 shown in FIG. 7 are also formed in a concentric disc shape and integrated, and the valve holder 34 made of a magnetic material has 12 through holes 34a. In addition to this, eight through holes 33a are formed by corrugating the outer diameter side of the valve element 33.

  By adding this through-hole 33a, when the valve body 33 is formed of a magnetic material, the fluid to be handled is within a range that does not affect the magnetic force required to attract the valve holder 34 and the valve body 33 by the suction element 8. Even when the viscosity increases, the influence on the operation of the valve holder 34 and the valve body 33 can be reduced. The number of through holes 33a and 34a is not particularly limited.

  Next, the relationship between the valve seat 2b of the valve body 2 of the electromagnetic valve 1 and the valve body 3 will be described with reference to FIG.

  In the electromagnetic valve 1 shown in FIG. 1, as shown in FIG. 8A, the valve seat 2 b of the valve main body 2 includes an opening 2 c that is circular when viewed from above and an upper surface 2 d that is annular when viewed from above.

  On the other hand, a valve seat 42b of the valve main body 42 shown in FIG. 8B is obtained by changing the opening 2c into a different shape, and includes a circular opening 42c in top view and another opening 42d. As a result, when the outlet port 42a is closed and the washer fluid on the outlet port 42a side becomes hot, it may be ejected to the rear camera side and applied to the rear camera, but the opening 42d is formed. Therefore, as shown by the arrow, the washer liquid is prevented from escaping to the valve chamber side through the opening 42d and being ejected to the rear camera side.

  In addition, the valve seat 52b of the valve main body 52 shown in FIG. 8C is also provided with a circular opening 52c as viewed from above and another opening 52d. As a result, when the outlet port 52a is closed and the washer fluid on the outlet port 52a side becomes hot, it may be ejected to the rear camera side and applied to the rear camera, but the opening 52d is formed. Therefore, as shown by the arrow, the washer liquid is prevented from escaping to the valve chamber side through the opening 52d and being ejected to the rear camera side.

DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Valve body 2a Valve chamber 2b Valve seat 2c Opening 2d Upper surface 3 Valve body 4 Valve holder 4a Through-hole 6 Coil spring 7 Pipe member 7a Outlet port 7b Outlet 8 Suction element 8a Body 8b (Mold resin) passage 9 Electromagnetic coil 11 Housing 11a Opening portion 12 Plate 12a Cavity 12b Recessed portion 12c Protruding portion 13 Outflow pipe 13a Outlet port 14 Inflow pipe 14a Inlet port 14b Welding portion 15 Mold 15a Lower end portion 15b Upper right portion 15c Welding portion 16 Terminal 17 Mounting portion 23 Valve body 24 Valve holders 24a, 24b Through hole 33 Valve body 33a Through hole 34 Valve holder 34a Through hole 42 Valve body 42a Outlet port 42b Valve seat 42c, 42d Opening 52 Valve body 52a Outlet port 52b Valve seat 52c, 52d Opening

Claims (1)

A resin 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;
An aspirator surrounding the pipe member and isolated from the inlet port, the first outlet port, the valve chamber and the second outlet port;
An electromagnetic coil surrounding the attractor;
Accommodating the electromagnetic coil, Ri Do a magnetic material, a housing having a plurality of openings,
Is integral with the valve body, made of a magnetic material, includes a plate that have a plurality of protrusions extending in a direction perpendicular to the moving direction of the valve body,
In the state where the plate faces the side surface of the valve holder, each of the plurality of protrusions inserted into each of the plurality of openings formed in the housing is perpendicular to the moving direction of the valve body. It is caulked and fixed to the housing in a state bent in a proper direction,
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.

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