JPH0632861U - solenoid valve - Google Patents

Abstract

(57) [Abstract] [Purpose] Especially in a double solenoid type solenoid valve with a solenoid part provided on one side of the main valve body, the internal circuit of the solenoid part is mounted on a flexible printed circuit board for downsizing and assembly workability. Provide a solenoid valve capable of improving A double solenoid type solenoid valve having a solenoid portion coupled to only one side of a main valve body portion, the main valve body portion having a main shaft housed so as to be displaceable along an axial direction, and this main valve It is composed of a solenoid portion or the like that generates a pressing force for displacing the main shaft of the main body portion. This solenoid part includes a pair of bridge diode 30a, light emitting diode 30b and resistor 30c, and an indicator lamp lighting circuit.
The surge absorbing circuit formed by the two transistor packages 30d is mounted on the flexible printed circuit board 30 which is bendable, and the connection hole 30e, the external connection terminal, and the power supply hole 30f are provided.
And the connection terminal of the solenoid coil are soldered to each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solenoid valve, and in particular, in a double solenoid type solenoid valve in which a solenoid portion is provided only on one side of a main valve body portion, the internal circuit of the solenoid portion is mounted on a flexible printed circuit board to reduce the shape and the assembly work. Technology that is effective when applied to a solenoid valve that is expected to improve its performance.

[0002]

[Prior art]

 For example, a double solenoid type solenoid valve includes a main valve main body having a main shaft that is housed so as to be displaceable along the axial direction, and a solenoid that generates a pressing force with which the main shaft of the main valve main body is displaced. A solenoid valve of the spool type indirectly operated type is provided, in which the solenoid section is coaxially coupled to both sides of the main valve body section, respectively, and the fluid pressure flow passage can be switched by displacement of the main shaft.

Particularly, in such a double solenoid type solenoid valve, two sets of a movable iron core and a fixed iron core are provided, for example, in response to the recent demands for wiring, simplification of assembly work and miniaturization of the outer shape. Improvements have been made in terms of work surface and external shape by incorporating the solenoid parts in parallel in the solenoid part and connecting this solenoid part to one side of the main valve body part.

[0004]

[Problems to be solved by the device]

 However, in the prior art as described above, for example, the indicator light lighting circuit of the solenoid section and the surge absorbing circuit are mounted on a printed circuit board, and the printed circuit board and external connection terminals and solenoid coil connection terminals are connected via lead wires or the like. Are connected with each other, and wiring in this case is a problem in terms of work efficiency.

In particular, when two sets of a movable iron core and a fixed iron core are built in parallel in the solenoid part, two solenoid coils must be arranged close to each other, and wiring and assembly in a narrower space are required. It is necessary to improve workability.

Therefore, even in such a partial configuration of the solenoid valve, there is a demand for downsizing of details such as component parts, efficiency of assembly work, and stabilization of quality by simplifying workability.

Therefore, an object of the present invention is to reduce the size of a double solenoid type solenoid valve in which a solenoid portion is provided on one side of a main valve body portion by mounting an internal circuit of the solenoid portion on a flexible printed circuit board. Another object of the present invention is to provide a solenoid valve capable of improving assembly workability.

The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[0009]

[Means for Solving the Problems]

 Of the devices disclosed in the present application, the outline of a typical one will be briefly described as follows.

That is, the solenoid valve of the present invention comprises a solenoid portion and a main valve main body portion, two sets of movable iron cores and fixed iron cores are built in parallel in the solenoid portion, and this solenoid portion is the main valve main body portion. A solenoid valve that is connected to only one side.The internal circuit that drives the solenoid is mounted on a flexible flexible printed circuit board, and the indicator light lighting circuit and surge absorption circuit are installed at one end of this flexible printed circuit board. A connecting hole for connecting to the external connecting terminal at the other end, and a power feeding hole for feeding the solenoid coil of the solenoid part at the center, and the connecting hole and the feeding hole and the external connecting terminal and the solenoid coil. The connection terminals are connected by soldering.

Further, the component mounting portion of the indicator lighting circuit and the surge absorbing circuit on the flexible printed circuit board is housed in the space circuit chamber of the solenoid cover, and the other portion is bent and integrally molded in the solenoid cover. It was done like this.

[0012]

[Action]

 According to the solenoid valve described above, the indicator light lighting circuit and the surge absorbing circuit as the internal circuit of the solenoid are mounted on the flexible printed circuit board, and the external connection terminal and the connection terminal of the solenoid coil and the connection hole and the power supply hole are provided. By connecting each of them with solder, it is possible to reduce the number of wiring work steps. As a result, the solenoid part can be easily assembled, and the solenoid valve can be made smaller and the assembly workability can be improved.

Further, since the component mounting portion on the flexible printed circuit board is housed in the space circuit chamber and the other portion is integrally molded, the quality in the assembling work can be stabilized. As a result, the quality of the solenoid section is stabilized, and a highly reliable solenoid valve can be obtained.

[0014]

【Example】

 FIG. 1 is a cross-sectional view showing a solenoid valve according to an embodiment of the present invention, and FIGS. 2 (a), (b), and (c) are front views and cross-sections showing in detail the solenoid portion of the solenoid valve of the present embodiment. 3A and 3B are a plan view and a side view showing the flexible printed circuit board in the solenoid portion of the solenoid valve, and FIG. 4 shows an internal circuit formed on the flexible printed circuit board. It is a circuit diagram.

First, the configuration of the solenoid valve according to the present embodiment will be described with reference to FIG.

The solenoid valve of the present embodiment is a double solenoid type solenoid valve in which, for example, two sets of movable iron cores and fixed iron cores are built in parallel in the solenoid part, and the solenoid part is coupled only to one side of the main valve body part. A main valve body 1 having a main shaft which is a valve and is housed so as to be displaceable in the axial direction; a solenoid part 2 which generates a pressing force for displacing the main shaft of the main valve main body 1; It is composed of a pilot valve body 3 that connects the valve body 1 and the solenoid portion 2, and has a structure in which the fluid pressure flow passage can be switched by a spool type indirect operation system.

The main valve body 1 has an input port 4, a first output port 5, a second output port 6, a first discharge port 7 and a second discharge port 8 for supplying / discharging fluid pressure on the outer peripheral portion thereof. Is opened, and these ports 4 to 8 are communicated with a shaft hole 9 that penetrates the inside of the main valve body 1 along the axial direction.

A spool (main shaft) 10 is housed in the shaft hole 9 of the main valve body 1 so as to be displaceable in the axial direction, and a first piston 11 and a second piston 12 are fixed to both ends of the spool. The first and second pistons 11 and 12 are housed in the first fluid chamber 13 and the second fluid chamber 14 in a displaceable manner.

Then, the first or second piston 11, 12 is pressed by the fluid pressure in the first or second fluid chamber 13, 14, and in conjunction therewith, the spool 10 moves to the right or left in FIG. By displacing in the direction, the flow path of the fluid pressure from the input port 4 can be switched.

As shown in FIG. 2, the solenoid portion 2 has two sets of a first solenoid 15 and a second solenoid 16 built therein in parallel and an outer end side of a solenoid cover 18 closed by an end cover 17. It is resin-molded and stored inside.

The first solenoid 15 and the second solenoid 16 are provided with solenoid coils 19 and 20, respectively, and the center holes of these solenoid coils 19 and 20 have columns (fixed iron cores) on the outer end side. ) 21 and 22 are inserted.

Further, plungers (movable iron cores) 23, 24 are housed in the center holes of the respective solenoid coils 19, 20 so as to be displaceable in the axial direction, and are formed at the joints with the pilot valve main body 3. The springs retained in the recesses of the fluid chambers 25 and 26 are urged to the valve seats of the flow passages 27 communicating with the shaft holes 9.

The magnetic paths of the first and second solenoids 15 and 16 include an outer iron core 28 provided on the outer end side of the solenoid portion 2 and a lower iron core 29 provided on the main valve body 1 side. Columns 21 and 22 are fixed to the outer iron core 28, and plungers 23 and 24 are movably inserted in the lower iron core 29.

When the first solenoid 15 is in the non-excited state, the plunger 23 maintains the state of being displaced toward the main valve body 1 by the biasing force of the spring, and is brought into contact with the valve seat of the flow passage 27. ing. On the other hand, when the first solenoid 15 is excited, the plunger 23 is displaced toward the column 21 side by the electromagnetic force generated in the column 21 and the plunger 23, and the flow passage 27 is opened. Further, the same operation is performed in the second solenoid 16.

Further, the internal circuit of the solenoid portion 2 is formed by mounting a circuit component constituting the circuit on one side of the flexible printed board 30, and is housed in the circuit chamber 31 of the solenoid cover 18. Further, the other side of the flexible printed board 30 is connected to an external connection terminal 32 which is connected to the outside.

The pilot valve main body 3 is provided with a manual pin 33 rotatably along the width direction thereof. Even when the first and second solenoids 15 and 16 are not excited, the manual pin 33 rotates. The spool 10 of the main valve body 1 is displaced in the same manner as the excited state of the first or second solenoid 15 or 16 by operation.

Further, a first fluid chamber 34 or a second fluid chamber 35 corresponding to the first solenoid 15 or the second solenoid 16 is formed at the connecting portion between the pilot valve body 3 and the main valve body 1, respectively. In the first and second fluid chambers 34 and 35, elastic flappers 36 and 37 are housed, and the flappers 36 and 37 made of an elastic body contact the valve seat of a flow passage 39 that communicates with a pilot discharge port 38 formed on the outer peripheral surface. It is touched.

Further, the first fluid chamber 34 of the pilot valve main body 3 and the fluid chamber 25 of the first solenoid 15 and the second fluid chamber 35 of the pilot valve main body 3 and the fluid chamber 26 of the second solenoid 16 are plural. Plunger pins 40 and 41, which are communicated with each other by the flow passages and are displaced in conjunction with the displacement of the plungers 23 and 24, are inserted therein.

When the first solenoid 15 is in the excited state, the flow passage 39 communicating with the pilot discharge port 38 is closed, while when the first solenoid 15 is in the non-excited state, the flapper 36 is moved by the plunger pin 40. Is displaced and the flow passage 39 is opened, so that the fluid pressure is discharged from the pilot discharge port 38 to the outside. Also, the same operation is performed in the second solenoid 16.

In the solenoid valve configured as described above, the detailed structure of the solenoid portion 2, which is a feature of the present invention, will be described in detail with reference to the circuit diagrams of FIGS. 3 and 4.

In the solenoid portion 2 of the present embodiment, the flexible printed circuit board 30 is not a conventional connecting structure for connecting a printed circuit board having an internal circuit formed through lead wires to each connection terminal. It is intended to improve the assembly workability by the internal circuit configuration and connection method.

That is, as shown in FIG. 3, the internal circuit of the solenoid portion 2 is mounted on a flexible flexible printed circuit board 30. At one end of the flexible printed circuit board 2, two sets of bridge diodes 30a and a light emitting diode are provided. An indicator lamp lighting circuit including the diode 30b and the resistor 30c and a surge absorbing circuit including two transistor packages 30d are formed.

A connection hole 30e for connecting to the external connection terminal 32 is provided at the other end of the flexible printed circuit board 30, and a power supply hole 30f for supplying power to the respective solenoid coils 19, 20 is provided at the center. The connection hole 30e and the external connection terminal 32 are soldered, and the power supply hole 30f and the connection terminals of the solenoid coils 19 and 20 are soldered.

Further, the component mounting portions of the indicator light lighting circuit and the surge absorbing circuit on the flexible printed circuit board 30 are housed in the circuit room 31 in the space formed in the solenoid cover 18, as shown in FIG. The lighting / extinguishing state of the light emitting diode 30b can be confirmed from the outside, and the other parts except the parts mounting part are bent and integrally molded in the solenoid cover 18.

As shown in FIG. 4, the internal circuit formed by the two sets of the bridge diode 30a, the light emitting diode 30b, the resistor 30c, and the transistor package 30d has a solenoid coil (SOL.A) of the first or second solenoid 15 or 16. 19, (SOL.B) 20, and the external power supply is connected through the external connection terminal 32 without being affected by the polarity.

Then, the voltage from the external power source is input to the bridge diode 30a through the external connection terminal 32, the bridge diode 30a rectifies the voltage polarity to the positive (+) or the negative (-), and emits light according to the position detection state. The diode 30b is turned on or off, and a transistor package 30d in which a transistor, a diode and a resistor are combined is connected for surge protection.

As a result, in the two sets of the first and second solenoids 15 and 16 of the solenoid unit 2, the internal circuit of the solenoid unit 2 is mounted on the flexible printed board 30, and the external connection terminal 32 and the solenoid coil are provided. Since the connection with 19, 20 can be made by soldering through the connection hole 30e and the power supply hole 30f, the wiring part can be reduced, the solenoid part 2 can be easily assembled, and the solenoid part 2 can be downsized. Becomes

Further, since the component mounting portion on the flexible printed circuit board 30 is housed in the circuit chamber 31 and the other portions are integrally molded, the quality in the assembling work can be stabilized.

Next, with regard to the operation of this embodiment, the operation of the solenoid valve will be described.

First, when the first solenoid 15 is energized from the state of FIG. 1, that is, the state in which both the first solenoid 15 and the second solenoid 16 are not energized, the column 21 and the plunger 23 in the first solenoid 15 are excited. An electromagnetic force is generated in the column, and the plunger 23 is displaced toward the column 21 by the magnetic attraction force generated by the electromagnetic force, and the flow passage 27 is opened.

On the other hand, in the second solenoid 16, the urging force of the spring locked by the plunger 24 maintains the state in which the plunger 24 is displaced toward the main valve body 1 side, and the valve seat of the flow passage 27 is maintained. The flow path 27 is closed by the contact.

In this state, when a fluid such as air is supplied to the input port 4 from a fluid pressure source (not shown), the first solenoid 15 passes through the shaft hole 9 and the flow passage 27, and A fluid flows into the opened fluid chamber 25.

Furthermore, the fluid that has flowed into the fluid chamber 25 flows into the first fluid chamber 13 of the main valve body 1 via the first fluid chamber 34 of the pilot valve body 3 and Together, the first piston 11 is pressed and the spool 10 is displaced rightward in FIG.

On the other hand, in the second solenoid 16, the plunger pin 41 is brought into contact with one end side of the plunger 24, and the flapper 37 is maintained in a state of being displaced leftward against the elastic force, and is then fed to the pilot discharge port 38. The flow passage 39 is opened. As a result, the fluid in the second fluid chamber 14 of the main valve body 1 is discharged to the outside from the pilot discharge port 38 via the second fluid chamber 35 of the pilot valve body 3.

At the same time, the fluid supplied to the input port 4 is connected to the first output port 5 from the first output port 5 via the shaft hole 9 and is a fluid pressure actuating device which is a driven system (not shown). Is supplied to. The fluid discharged from the fluid pressure actuated device is discharged from the second output port 6 through the shaft hole 9 to the outside through the second discharge port 8.

Contrary to the above, when the first solenoid 15 is in the non-excited state and the second solenoid 16 is in the excited state, the second solenoid 15 is excited in the same manner as when the first solenoid 15 is excited. 16, an electromagnetic force is generated in the column 22 and the plunger 24, and the plunger 24 is displaced to the column 22 side by the magnetic attraction force due to this electromagnetic force, so that the spool 10 of the main valve body 1 moves to the left in FIG. Is displaced.

In this state, the fluid supplied to the input port 4 is supplied to the fluid pressure actuated device from the second output port 6 via the shaft hole 9 and further discharged from this fluid pressure actuated device. Is discharged from the first output port 5 through the shaft hole 9 to the outside through the first discharge port 7.

Therefore, according to the solenoid valve of the present embodiment, in particular, in the detailed structure of the solenoid portion 2 which is the feature of the present invention, the internal circuit of the solenoid portion 2 is mounted on the flexible printed circuit board 30, and this flexible printed circuit is mounted. The solenoid part 2 can be miniaturized by integrally molding other parts on the board 30 except the parts mounting part, and the wiring work can be facilitated and the assembly workability can be improved. It is possible to obtain a highly reliable solenoid valve by stabilizing the quality of.

Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in the case of the solenoid valve of this embodiment, when the indicator light lighting circuit including the light emitting diode 30b as shown in FIG. 3 and the surge absorbing circuit including the transistor package 30d are formed on the flexible printed board 30. However, the present invention is not limited to the above embodiment, and various modifications can be made to the shape of the flexible printed circuit board, the shape and arrangement of the circuit components, and the like.

Also, regarding the circuit configuration of the internal circuit formed on the flexible printed circuit board 30, the voltage configuration of the solenoid valve, the rectification method, the surge countermeasure method, etc. are supported, and the circuit configuration shown in FIG. It goes without saying that this is not the case.

In the above description, the invention mainly made by the present inventor is applied to a double solenoid / spool type indirect actuation type solenoid valve which is the field of application thereof, but the invention is not limited to this. Instead, it can be widely applied to other solenoid valves in which two sets of plungers and columns are built in parallel in the solenoid section.

Further, it goes without saying that the present invention can also be applied to a directional control valve, a control valve, etc. having such an electromagnetic valve structure with a solenoid portion.

[0054]

[Effect of device]

 The effects obtained by the representative one of the inventions disclosed in the present application will be briefly described as follows.

(1). An internal circuit that drives the solenoid is mounted on a flexible printed circuit board that can be bent, and an indicator lighting circuit and a surge absorption circuit are formed at one end of this flexible printed circuit and the other end is formed. Is provided with a connection hole for connecting to an external connection terminal, and a power supply hole for supplying power to the solenoid coil of the solenoid section is provided at the center, and the connection hole and the power supply hole are connected with the external connection terminal and the connection terminal of the solenoid coil. By connecting each of them with solder, the number of wiring work steps can be reduced, so that the solenoid part can be easily assembled.

(2). Parts of indicator light lighting circuit and surge absorption circuit on flexible printed circuit board The mounting part is housed in the space circuit room of the solenoid cover, and the other part is bent and integrally molded in the solenoid cover. As a result, the quality of the assembly work can be stabilized, and the quality of the solenoid section can be stabilized.

(3) Due to the above (1) and (2), the internal circuit is formed on the flexible printed circuit board, and the other parts except the circuit part are integrally molded, so that the solenoid part can be downsized. Becomes

(4). According to the above (1) to (3), the solenoid part in which two sets of movable iron core and fixed iron core are built in parallel is a double solenoid type in which only one side of the main valve main body is connected. In this solenoid valve, it is possible to obtain a highly reliable solenoid valve that can be downsized in shape, improve assembly workability, and stabilize quality by the configuration and connection method of the internal circuit by the flexible printed circuit board.

[Brief description of drawings]

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

2A, 2B, and 2C are a front view, a cross-sectional view, and a rear view showing in detail a solenoid portion of the solenoid valve according to the present embodiment.

3 (a) and 3 (b) are a plan view and a side view showing a flexible printed circuit board in the solenoid portion of the solenoid valve according to the present embodiment.

FIG. 4 is a circuit diagram showing an internal circuit formed on a flexible printed circuit board in the solenoid portion of the solenoid valve according to the present embodiment.

[Explanation of symbols]

 1 Main Valve Main Body 2 Solenoid Part 3 Pilot Valve Main Body 4 Input Port 5 First Output Port 6 Second Output Port 7 First Discharge Port 8 Second Discharge Port 9 Shaft Hole 10 Spool (Spindle) 11 First Piston 12th 2 piston 13 1st fluid chamber 14 2nd fluid chamber 15 1st solenoid 16 2nd solenoid 17 end cover 18 solenoid cover 19,20 solenoid coil 21,22 column (fixed iron core) 23,24 plunger (movable iron core) 25,26 Fluid chamber 27 Flow passage 28 Outer iron core 29 Lower iron core 30 Flexible printed circuit board 30a Bridge diode 30b Light emitting diode 30c Resistor 30d Transistor package 30e Connection hole 30f Power feeding hole 31 Circuit room 32 External connection terminal 33 Manual pin 34 First fluid chamber 35th 2 fluid chamber 6,37 flapper 38 pilot discharge port 39 passages 40 and 41 the plunger pin

Claims (2)

[Scope of utility model registration request] 1. A solenoid part and a main valve body part are provided,
A solenoid valve in which two sets of a movable iron core and a fixed iron core are installed in parallel in the solenoid part, and the solenoid part is coupled only to one side of the main valve body part, and an internal circuit for driving the solenoid part is provided. The flexible printed circuit board is mounted on a flexible flexible printed circuit board, the indicator light lighting circuit and the surge absorbing circuit are formed at one end of the flexible printed circuit board, and the other end is provided with a connection hole for connecting to an external connection terminal, and a central portion. Is provided with a power supply hole for supplying power to the solenoid coil of the solenoid portion, and the connection hole and the power supply hole are soldered to the external connection terminal and the connection terminal of the solenoid coil, respectively. 2. A component mounting part of an indicator light lighting circuit and a surge absorbing circuit on the flexible printed circuit board is housed in a space circuit chamber of a solenoid cover, and the other part is bent and integrally molded in the solenoid cover. The solenoid valve according to claim 1, wherein: