JPH0735172Y2 - Solenoid valve power supply structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a power supply structure for a solenoid valve that is attached to an automatic return device for automobiles and has a body ground structure.

(Prior Art) Conventionally, an electromagnetic valve mounted in an automatic transmission for an automobile, in which one end side of a coil winding is body-grounded, is shown in, for example, FIGS. 3 and 4. That is, this solenoid valve is composed of a valve body 51 supported by, for example, a chassis of an automobile and the valve body 51.
It is composed of a solenoid valve main body 52 screwed to 51.

The solenoid valve main body 52 includes a core 53 having a screw portion 53a screwed into a screw hole 51a of the valve body 51, and a solenoid 55 joined and fixed by a housing 54 together with the core 53.
And have. The solenoid 55 has a bobbin 57 forming a valve chamber 56 on one end side of the core 53, and a coil 58 wound around the bobbin 57. The bobbin 57 has a coil fixed to the housing 54 by caulking. A ground terminal 60, which contacts a plate 59 closing one end of the valve chamber 56, and a signal terminal 61 are provided.

One end of the winding of the coil 58 is connected to a signal terminal 61, and a lead wire 64 having a connector 63 is connected to the signal terminal 61. On the other hand, the other end of the winding is connected to the ground terminal 60 and the other end is connected to the ground terminal 60.
Is grounded to the valve body 51 through the plate 59, the housing 54, and the core 53.

Then, in the solenoid valve, a signal voltage is applied to the coil 58 via the lead wire 64 and the valve body 51 to excite the solenoid 55, and at the same time, the electromagnetic attraction force generated in the valve chamber 56 The plunger 65, which is the valve element housed in the, is operated.

(Problems to be solved by the invention) However, in the conventional solenoid valve, the solenoid valve main body 52
When screwing on the valve body 51, the body grounding is surely performed, but the position of the signal terminal 61 in the rotation direction differs depending on the solenoid valve main body 52 to be attached, and the lead wire 64 of the solenoid valve is The pullout direction was not constant.

Therefore, when the connector 63 is connected to a predetermined connection point, the length of the lead wire 64 is insufficient, or the length is excessive, and the length of the lead wire 64 is excessive, which results in hindering the wiring work of the lead wire 64. In addition, there is a problem that the lead wire 64 interferes with other parts or the like.

The present invention has been made in view of such a conventional problem, and facilitates the wiring work of the lead wire, and
It is an object of the present invention to provide a solenoid valve power supply structure that prevents interference between a lead wire and other components.

(Means for Solving the Problems) In order to solve the above problems, in the present invention, a solenoid valve body screwed to a valve body has a core screwed to the valve body, and A coil joined through a housing, one end of a winding of the coil is grounded to the valve body through the housing and the core, and the other end of the winding is connected to a signal terminal. In the solenoid valve, the housing is provided with a window,
Further, an extension portion extending from the window to the outside of the housing is integrally formed on the bobbin around which the coil is wound, and the signal terminal is embedded in the extension portion and faces the valve body. An elastic contact having a tip bent upward from the lower surface of the extending portion is formed integrally with the signal terminal, while the contact is elastic between the solenoid valve body and the valve body. A washer-shaped printed circuit board having an annular printed circuit in contact therewith is inserted, and the printed circuit is provided with a lead wire connected to a signal voltage supply source.

(Operation) In the above configuration, the solenoid valve body is screwed to the valve body by screwing the core to the valve body. When the electromagnetic valve main body is screwed at the time of such screwing, the contact element is appropriately deformed while the bent portion on the tip side thereof is brought into sliding contact with the printed circuit board of the printed circuit board. When the solenoid valve body is fixed, the contact is elastically contacted with any position of the printed circuit regardless of the final rotation position of the solenoid valve body with respect to the valve body.

Therefore, even when the final rotation position of the solenoid valve body is different, the connection state between the other end side of the coil winding and the lead wire is always secured, and at the same time, the lead wire provided on the printed circuit board The pull-out position and direction are kept constant.

Also, since the contactor hangs down from the extending portion integrally formed with the bobbin, when the contactor is deformed and elastically contacted with the printed circuit, the base end portion of the contactor is extended from the window of the housing. By being held by the extended portion of the bobbin, the bent portion on the front end side is mainly deformed. Therefore, there is no concern that the deformed contact will contact the opening edge of the window, that is, the housing.

Furthermore, since the contact has a shape in which the tip hangs from the lower surface of the extension and then the tip bends upward, when the contact makes elastic contact with the printed circuit board, part of the stress applied to the contact is at the tip side. It is spent to move the bent portion toward the base end side. For this reason, the deviation in the direction traversing the printed circuit at the contact position between the printed circuit and the contact 15 is slight with respect to the screwing distance of the solenoid valve body. Therefore, it occurs with the change of the final rotation position of the solenoid valve body, that is, the screw advance distance. The displacement of the contact position between the printed circuit and the contactor in the above direction is slight.

(Embodiment) An embodiment in which the present invention is applied to a screw-on type solenoid valve will be described below with reference to FIG. 1 which is a longitudinal sectional view and FIG. 2 which is a perspective view of the embodiment. . That is, as shown in FIGS. 1 and 2, the solenoid valve has a valve body 1 and a solenoid valve body 2 screwed to the valve body 1, and a printed circuit board 3 is provided between them. Has been held.

The solenoid valve body 2 is a cylindrical cover 4 which is a housing made of a magnetic material having conductivity, a core 5 fixed by caulking to an opening on one end side of the cylindrical cover 4, and the other end side of the cylindrical cover 4. It has a plate 6 made of a non-magnetic material having conductivity fixed by caulking at the opening of the solenoid 6, and a solenoid 7 housed between the core 5 and the plate 6.

The solenoid valve body 2 is attached to the valve body 1 by screwing a threaded portion 5a integrally formed with the core 5 so as to project to one end side thereof into a screw hole 1a provided in the valve body 1. It is fixed. The screw part
A fluid passage 5b is penetrated through 5a along its axis, and an orifice 5c is formed at an opening portion of the fluid passage 5b located on the solenoid 7 side.

Further, the solenoid 7 has a bobbin 9 for accommodating the plunger 8 and a coil 10 wound around the bobbin 9. The solenoid 7 is pressed against the plate 6 by a wave washer 11 inserted between one end of the bobbin 9 and the core 5, so that the ground terminal 12 provided at the other end of the bobbin 9 is connected to the plate 6. It is connected to the. One end of the winding of the coil 10 is connected to the ground terminal 12.

Further, on one end side of the bobbin 9, an extending portion 13 extending from the window 4a provided on the cylindrical cover 4 to the outside of the cylindrical cover 4 is integrally formed, and the extending portion 13 is provided with a signal. Terminal 14
Is buried. The signal terminal 14 is integrally formed with an elastic plate-shaped contactor 15 which is hung from the lower surface 13a of the extending portion 13 facing the valve body 1 and whose tip is bent upward. The signal terminal 14 has the coil
The other ends of the 10 windings are connected.

On the other hand, the printed circuit board 3 has a washer shape, and is externally fitted to the threaded portion 5 a of the core 5 and pressed against the valve body 1 by the core 5. A bulged portion 3a located between the positioning protrusions 1b, 1b provided on the surface of the valve bulging portion 1 is provided on the outer peripheral portion of the printed circuit board 3, and the solenoid valve is provided on the surface of the printed circuit board 3. An annular printed circuit 16 is provided which surrounds the main body and in which the bent portion 15a on the tip end side of the contactor 15 elastically contacts. Also,
A flexible board 17 having a lead wire is attached to the printed circuit board 3 with its signal line circuit 18 joined to the printed circuit 16.

In this embodiment having the above-described structure, when the solenoid valve body 2 is attached to the valve body 1, first, the bulging portion 3a
The printed circuit board 3 is arranged on the valve body 1 so that the protrusions 1b are located between the protrusions 1b. At this time, the flexible substrate 17 is in a state of extending to a signal voltage supply source (not shown).

Next, the solenoid valve main body 2 is screwed so that the screw portion 5a of the core 5 is screwed into the screw hole 1a. Then, the contactor 15 gradually approaches the printed circuit board 3, the bent portion 15a of the contactor 15 eventually contacts the surface of the printed circuit 16, and thereafter the contactor 1
The reference numeral 5 appropriately deforms while sliding on the printed circuit 16. Then, when the screwing of the solenoid valve body 2 is completed, the contactor 15 is in a state of being elastically contacted with an arbitrary position on the surface of the annular printed circuit 16 (the state shown in FIGS. 1 and 2). .

As a result, when the solenoid valve body 2 is completely screwed, the coil 10
One end of the winding of the coil 10 is grounded to the valve body 1 via the ground terminal 12, the cylindrical cover 4 and the core 5, and at the same time, the other end of the coil 10 has the signal terminal 14 (contact 15) and the printed circuit. Signal line circuit of flexible board 17 through 16
Connected to 18.

Therefore, even when the final rotational position of the solenoid valve body 2 with respect to the valve body 1 at the time of completion of screwing is different for each solenoid valve, the pulling direction of the flexible substrate 17 can always be maintained at a constant direction. As a result, when the solenoid valve body 2 is completely screwed in, the flexible substrate
The length of 17 is not short, or the length is not excessive, and the length of the flexible board 17 is not excessive, so that the wiring of the flexible board 17 can be facilitated and interference between the flexible board 17 and other components can be prevented.

Further, in the solenoid valve main body 2, the window 4a is provided in the cylindrical cover 4, while the contactor 15 extends from the extending portion 13 of the bobbin 9 extending outside from the window 4a,
The other end of the coil 10 has a cylindrical cover 4 with a simple structure.
Can be pulled out.

Moreover, since the deformed contactor 15 is held by the extending portion 13 of the bobbin 9 at the base end portion of the deformed contactor 15 when the electromagnetic valve main body 2 is completely screwed, the deformed contactor 15 is attached to the cylindrical cover 4. The opening edge of the opening window 4a, that is, the contact with the cylindrical cover 4 is prevented. Therefore, when manufacturing the solenoid valve body 2, it is not necessary to prevent short-circuiting between the cylindrical cover 4 and the contact 15 by filling the space between the contact 15 and the opening edge of the window 4a with resin or the like. The valve body 2 can also be manufactured at a lower cost.

Further, since the contactor 15 has a shape that hangs from the lower surface 13a of the extending portion 13 of the bobbin 9 and then the tip is bent upward, when the contactor 15 elastically contacts the printed circuit board 3,
Part of the stress applied to 15 is consumed to move the bent portion 15a on the distal end side to the proximal end side. Therefore, there is a deviation in the direction crossing the annular printed circuit 16 (the direction indicated by the arrow in FIG. 1) at the contact position between the printed circuit 16 and the contactor 15 with respect to the screwing distance of the solenoid valve body. It becomes a little. Therefore, the displacement of the contact position between the printed circuit 16 and the contact 15 in the above-mentioned direction caused by the change of the final rotational position of the solenoid valve main body 2, that is, the screw advance distance becomes slight.

Therefore, the outer dimensions of the washer-shaped printed circuit board 3 or the annular printed circuit 16 can be reduced.
As a result, it is possible to save space in the mounting portion of the solenoid valve body 2 in the valve body 1. Also,
When a plurality of solenoid valve bodies 2 can be attached to the same valve body 1, the space between the plurality of solenoid valve bodies 2 can be narrowed to reduce the installation space of the solenoid valves.

(Effect of the Invention) As described above, in the present invention, the solenoid valve body is screwed to the valve body, and one end of the coil winding constituting the solenoid valve body is attached to the valve body through the housing and the core. In a grounded solenoid valve, the contactor formed integrally with the signal terminal causes the washer-shaped printed circuit board provided between the valve body and the solenoid valve body when the solenoid valve body is screwed to the valve body. The other end of the coil winding connected to the signal terminal is connected to the lead wire connected to the printed circuit by being elastically contacted with any part of the annular printed circuit.

Therefore, even when the final rotation position of the solenoid valve body screwed to the valve body is different, the lead-out direction of the lead-out line can always be maintained at a constant direction.
As a result, the length of the lead wire is not insufficient or the length of the lead wire is not excessive so that the lead wire can be easily wired and interference between the lead wire and other parts can be prevented.

Further, while the window is provided in the housing, the contactor is formed integrally with the bobbin around which the coil is wound and hangs down from the extending portion extending to the outside from the window. With the structure, the other end of the coil winding can be drawn out of the housing. Moreover, since there is no concern that the deformed contact will contact the housing,
At the time of manufacturing the solenoid valve body, it is not necessary to prevent short-circuiting between the housing and the contactor by filling the space between the contactor and the opening edge of the window with resin, etc. It can also be manufactured.

Further, the contact has a shape in which the tip hangs from the lower surface of the extending portion and then the tip is bent upward, and the contact of the contact to the printed circuit is generated by a change in the final rotation position (screw distance) of the solenoid valve body. The deviation in the direction of forming the printed circuit at the contact position is slight. Therefore,
It is possible to reduce the outer dimensions of the printed circuit board or printed circuit, and as a result, it is possible to save space in the mounting portion of the solenoid valve main body in the valve body and to reduce the installation space of the solenoid valve.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is an external perspective view of the same embodiment, FIG. 3 is a sectional view showing a conventional example, and FIG. 4 is that of FIG. It is a perspective view. 1 ... Valve body, 2 ... Solenoid valve body, 3 ... Printed circuit board, 4 ... Cylindrical cover (housing), 5 ... Core, 9 ... Bobbin, 10 ... Coil, 12 ... Ground terminal,
13 …… extension part, 13a …… bottom surface, 14 …… signal terminal, 15 ……
Contact, 15a …… Bending part, 16 …… Printed circuit, 17…
… Flexible board (lead wire).

Claims (1)

[Scope of utility model registration request] 1. A solenoid valve body screwed to a valve body has a core screwed to the valve body, and a coil joined to the core through a housing, and one end of a winding of the coil. In the solenoid valve whose side is grounded to the valve body through the housing and the core, and the other end of the winding is connected to a signal terminal, a window is provided in the housing and the coil is wound. An extension portion extending from the window to the outside of the housing is formed integrally with the bobbin, the signal terminal is embedded in the extension portion, and the signal terminal is suspended from a lower surface of the extension portion facing the valve body. After that, a contact having elasticity whose tip is bent upward is integrally formed with the signal terminal, and between the solenoid valve body and the valve body,
A solenoid valve power, characterized in that a washer-shaped printed circuit board having an annular printed circuit with which the contact is elastically contacted is inserted, and the printed circuit is provided with a lead wire connected to a supply source of a signal voltage. Supply structure.