JP2002172293A - Multi-functional displacement sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-functional displacement sensor advantageous in cost by integrating (compounding) single-function displacement sensors for detecting the water level, vibration, opening and closing of a door, and the like, at a customer's demand while the conventional washing machine is loaded with a displacement sensor, a vibration (rocking detecting) sensor, a door switch, and the like, respectively. SOLUTION: In a displacement sensor displacement detecting part 11, a magnetic member 34 is provided on an upper part of an upper case 20 engaged with a lower case 25, a metal ring 93 is provided on an outer peripheral part of the upper case 20, and an oscillating coil 40 is provided on a diaphragm reinforcing plate 44 (46) side disposed on the upper part of a diaphragm 47 sandwiched between the upper case 20 and the lower case 25. The detecting part 11 is taken as a base, rocking is detected by a lever body B90 engaged with the magnetic member 34, and the opening and closing of the door is detected by a lever body A91 engaged with the metal ring 93.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LC oscillation type for detecting a displacement of a water level of a water tank mounted on an electric appliance (for example, a fully automatic washing machine, a clothes dryer, a dishwasher, a refrigerator, a freezer) and the like. This relates to a displacement sensor, and more specifically, in a fully automatic washing machine or the like, eccentric rotation of a washing tub (dehydration tub) caused by deviation of laundry (particularly, vibration caused by collision between the washing machine main body and the washing tub during dehydration). The present invention relates to a multifunctional displacement sensor capable of detecting a swing state caused by abnormal rotation, a door open / close state of an electric device or the like, and a water tank water level of an electric device or the like.

[0002]

2. Description of the Related Art Conventionally, air in an air trap is compressed according to the level of water supplied to a washing tub of a washing machine or the like, the gas pressure is guided to a pressure receiving chamber, converted into a diaphragm displacement, and the diaphragm displacement is converted into a frequency. LC that outputs square wave oscillation
The oscillation type displacement sensor 10 includes, for example,
No. 771, Japanese Utility Model No. 30444686,
U.S. Pat. No. 5,760,577, JP-A-2000-28
No. 3871 is known.

The configuration (hardware) of the displacement detecting section of the displacement sensor 10 is, for example, shown in FIGS.
As shown in the figure, an upper case (for example, a resin molded member such as PP resin) 70 having a screw portion 76 at an upper portion, and a compression coil spring adjusting screw 71 screwed to the upper case 70
And an oscillating coil 8 having a winding hole fixed to the upper case 70 so that the winding hole faces the opening of the magnetic member 85.
8, a hollow columnar magnetic member (ferrite core) 85 supported by a diaphragm reinforcing plate 84, and a diaphragm 8
3 and the oscillation coil 8
8, a diaphragm reinforcing plate movable in the axial direction (moves toward and away from the oscillation coil 88.
As disclosed in Japanese Unexamined Patent Publication No. 94, JP-A-2000-19048, and the like, when formed only with a magnetic member, it is not particularly necessary to provide them as components. ) 84, the compression coil spring adjusting screw 71 and the diaphragm reinforcing plate 84.
(Or the magnetic member 85) and the diaphragm reinforcing plate 8 which is displaced in the axial direction of the oscillation coil 88 by the gas pressure of the pressure receiving chamber.
4, a circular diaphragm (soft rubber, hard metal plate), which is disposed between the upper case 70 and the lower case 80 and is sandwiched between the upper case 70 and the lower case 80.
3 and a lower case (for example, a resin molded member such as PP resin) 80 having a gas inlet 81 fitted to the upper case 70 and having the diaphragm 83 and the pressure receiving chamber 82. Are known. This is a single-function type in which a conventional contact type pressure switch is replaced with a non-contact type displacement sensor 10.

For reference, assuming that the inductance of the oscillation coil 88 is L and the capacitance of the resonance capacitor 89 (a non-polar one is good) is C, a harmonic oscillation circuit (oscillation method) using the frequency selection element LC is used. It is known that a sine wave (oscillation output) can be obtained when adopted, and a square wave (oscillation output) can be obtained when a relaxation oscillation circuit (oscillation method) is adopted. And, L used in the displacement sensor 10
In the C oscillation circuit unit (which may be provided on the displacement detection unit side of the displacement sensor 10 or may be provided on the printed wiring board side that controls the electrical control of a washing machine or the like on which the displacement sensor 10 is mounted). For example, an LC oscillation circuit disclosed in Japanese Patent Publication No. 5-43398 (for example, Colpitts type, Hartley type, anti-coupling type, the modified type), and JP-A-7-32
As shown in the LC oscillation circuit disclosed in Japanese Patent No. 4965 or the like, or an LC oscillation circuit section 19 in FIG. 15, an oscillation coil (for example, an enamel insulated copper wire called a magnet wire, etc. Wrap it around a bobbin, etc.
88, a capacitor (for example, a polypropylene film capacitor) 89, and an unbuffer-type inverter, which are connected to terminal strips such as Faston terminal # 250 or the like or lead wires by soldering, fusing, spot welding, laser welding, or the like. IC (for example, product number 74HCU04)
And an LC oscillation circuit (including an LC resonance circuit and the like).
In addition, self-excited type, separately-excited type, parallel type, series type, positive feedback type, negative feedback type, etc. may be used. same as below. ), Which often output square wave oscillation.

[0005] An LC oscillation type displacement sensor suitable for detecting swinging caused by eccentric rotation of a washing tub caused by unevenness of laundry, etc., is disclosed in, for example, JP-A-9-313777. What is known is. This is a single-function type in which a conventional contact-type swing detection switch is replaced with a non-contact type displacement sensor.

[0006] Then, detecting the water level of a washing tub of a washing machine or the like,
For example, JP-A-2000-051564 and JP-A-2000-2005 disclose an LC oscillation-type multifunctional displacement sensor capable of detecting swinging caused by eccentric rotation of a washing tub caused by unevenness of laundry. Japanese Patent Application Laid-Open No. 245990/1990 and the like are known.

[0007]

However, the aforementioned L
The multi-function displacement sensor of the C oscillation type requires additional parts, such as a rolling member such as a magnetic material and a supporting member for the rolling member, is disadvantageous in cost, and has a slightly inclined washing machine body. When installed in a place, there is a problem that a problem may occur in detection accuracy. or,
For example, as in a door switch disclosed in Japanese Patent Application Laid-Open No. 6-114191, detection of swinging due to eccentric rotation of a washing tub caused by unevenness of laundry and the like and a door open / close state of a washing machine or the like are performed. There has been no switch that can be used for multiple purposes and replaced with a displacement sensor or the like to integrate (composite) it into a multifunctional type.

A conventional washing machine or the like is equipped with a displacement sensor, a vibration (oscillation detection) sensor, a door switch, and the like, and microcomputers and the like mounted on a printed wiring board for controlling the electric outputs individually. Processing electric signals and the like. For the frequency output by the displacement sensor, for example, an oscillation frequency measured first after power-on is set as an initial value (for example, a RAM or EEPROM built in a microcomputer, an external EEPROM).
Writing as data to PROM etc. And an electric control system that uses a relative value such as recognizing the water level based on a deviation from the initial value when measuring the frequency corresponding to the water level of the water supplied to the washing tub of the washing machine. However, there is a problem that the memory capacity cannot be saved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a single-function displacement sensor for detecting a water level, a swing, a door open / close, and the like. The present invention is intended to provide a multifunctional displacement sensor that is integrated (combined) in accordance with a customer (washing machine maker or the like) request and is cost-effective.

[0010]

In order to achieve the above object, an LC oscillation type multifunctional displacement sensor according to the present invention comprises a moving oscillator coil, a moving oscillator coil, and a moving oscillator coil.
A displacement sensor comprising a metal and moving ferrite core type displacement detecting section, and an LC oscillation circuit section configured by the moving oscillation coil, a capacitor and an inverter IC and outputting a square wave oscillation. Having.

The first embodiment (hardware) of the displacement detecting section includes an upper case, a compression coil spring adjusting screw for receiving a compression coil spring, and a compression coil spring adjusting screw provided on the upper case. Can be screwed and moved in the axial direction of the oscillating coil by pressing the operating rod (lever, handle, arm). Displacement provided with a mechanism that causes discontinuous movement may be used. The same applies to the following.) A possible magnetic member support and a hollow columnar magnetic member (for example, a ferrite core) supported by the magnetic member support An oscillation coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and interlocked with the displacement of the diaphragm. A diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillation coil, a compression coil spring constantly biasing the compression coil spring adjusting screw and the diaphragm reinforcing plate, and a gas in the pressure receiving chamber. A circular diaphragm that is displaced in the axial direction of the oscillation coil by pressure, is disposed below the diaphragm reinforcing plate, and is sandwiched between the upper case and the lower case, and has a gas inlet fitted to the upper case. A lower case forming a pressure receiving chamber together with the diaphragm.

The second embodiment of the displacement detecting unit is of a type without a compression coil spring adjusting screw, and includes an upper case and an oscillating coil which is provided on the upper case and which receives a compression coil spring by pressing a pressing rod. A magnetic member support movable in the axial direction of the member, and a bamboo column (a cylinder having a substantially H-shaped cross section), a cup (a cup having a substantially concave cross section) or a hollow section supported by the magnetic member support A cylindrical magnetic member, an oscillating oscillation coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member; A diaphragm reinforcing plate movable in the case in the axial direction of the oscillation coil,
A compression coil spring that constantly urges the magnetic member support and the diaphragm reinforcing plate, and is displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber, and is disposed below the diaphragm reinforcing plate. A circular diaphragm sandwiched between the upper case and the lower case; and a lower case fitted with the upper case and having a gas inlet and forming a pressure receiving chamber together with the diaphragm.

The first embodiment of the displacement detecting unit is of a type having no magnetic member support, and includes an upper case and a compression coil spring provided on the upper case, which receives a compression coil spring and presses an operating rod to generate an oscillation coil. A bamboo cylinder, cup-shaped or hollow cylinder-shaped magnetic member movable in the axial direction, and a winding hole, which is supported by the diaphragm reinforcing plate so that the winding hole faces the opening of the magnetic member. Oscillation coil, a diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and constantly urges the magnetic member and the diaphragm reinforcing plate. A compression coil spring, a circular diaphragm displaced in the axial direction of the oscillation coil due to gas pressure in the pressure receiving chamber, disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case, and the upper case; And the lower case to form a receiving chamber together with the diaphragm has a fitted gas inlet consists.

In the fourth embodiment of the displacement detecting section, the magnetic member is formed in a cylindrical shape having a screw groove (male screw or female screw) on the outer peripheral wall (for example, turned with a hexagon wrench, a plus or minus screwdriver, etc.). It is good to provide a groove which can be formed at substantially the center.) It is a type that can adjust the initial oscillation frequency and does not adjust the spring constant of the medium-diameter compression coil spring. A magnetic member screw-type support that can be moved in the axial direction of the oscillation coil by pressing, and a screw-shaped cylinder (including a cylinder with a substantially convex cross-section) supported by the magnetic member screw-type support. An oscillation coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the bottom wall of the magnetic member; and oscillating in the upper case in conjunction with the displacement of the diaphragm. A coil movable in the axial direction of the coil A diaphragm reinforcing plate, a compression coil spring which constantly urges the magnetic member screw-type support and the diaphragm reinforcing plate, and a diaphragm which is displaced in an axial direction of the oscillation coil by gas pressure of a pressure receiving chamber. A circular diaphragm disposed below the reinforcing plate and sandwiched between the upper case and the lower case; and a lower case fitted with the upper case and having a gas inlet and forming a pressure receiving chamber together with the diaphragm. .

[0015] The function of the first embodiment of the displacement detecting section is that the push rod is engaged with a detecting rod which is disposed on the outer periphery of the washing tub and detects a swing collision by eccentric rotation of the washing tub. And a water level detection function that obtains a change in the LC oscillation frequency by using an oscillation coil that is displaced by the gas pressure in the pressure receiving chamber. I do.

Alternatively, a door opening / closing detecting function in which a change in LC oscillation frequency can be obtained by a magnetic member which is displaced by pressing a operating rod engaged with a door of a washing machine or an electric device, etc., and is displaced by gas pressure in a pressure receiving chamber. A water level detecting function for obtaining a change in the LC oscillation frequency by the oscillation coil.

The first operation (software) of the displacement detecting section is that the LC oscillation frequency Fin, which is changed by a magnetic member displaced by pressing the operating rod or an oscillating coil displaced by the gas pressure of the pressure receiving chamber, is determined in advance. Settings (for example, ROM or EEPROM built in the microcomputer, external EEPROM
Write it in ROM or other data. ) Is compared with a plurality of determined frequencies Fde to calculate the displacement amount.

The second embodiment of the displacement detecting section is as follows. One configuration of the displacement detecting section is as follows. When an operating member A (lever, handle, arm) disposed on the outer periphery of the upper case is pressed, the displacement detecting section is moved from the axial direction of the oscillation coil. The oscillation coil may be moved toward and away from the oscillating coil (the rod A may be a displacement of continuous movement in an analog manner, or a displacement provided with a mechanism that makes a discontinuous movement in a digital or snap switch or reversing switch operation. The same applies to the following.) Possible metal rings (for example, iron plate, stainless plate, copper plate, aluminum plate, titanium plate, magnesium plate and / or composite heavy plate, alloy thereof), compression coil spring adjusting screws for receiving compression coil springs, The compression coil spring adjusting screw provided on the upper case can be screwed therein and can be moved in the axial direction of the oscillation coil by pressing the operating rod B (lever, handle, arm). The displacement may be an analog continuous motion or a digital or a displacement provided with a mechanism that causes a discontinuous motion in a snap switch or a reversing switch operation. The same applies to the following.) A hollow cylindrical magnetic member (e.g., a ferrite core) supported by the magnetic member support; and a diaphragm reinforcing plate having a wound hole such that the wound hole faces the opening of the magnetic member. The oscillation coil, the diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and the compression coil spring adjusting screw and the diaphragm reinforcing plate are always resiliently provided. Due to the compression coil spring being urged and the gas pressure in the pressure receiving chamber, it is displaced in the axial direction of the oscillation coil and is disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case. And the lower case to form a receiving chamber with the diaphragm has a circular diaphragm, a combined gas inlet fitting and the upper case is made of a. For example, as disclosed in Japanese Patent Publication No. 5-049056, the use of a magnetic material or a non-magnetic material allows the metal ring to pass a magnetic flux about 1000 times higher than air, and a capacitor for the metal ring. This makes it easy to change the oscillation frequency Fin of the LC oscillation circuit section including the oscillation coil and the inverter IC.

The second embodiment of the displacement detection unit is of a type having no compression coil spring adjusting screw, and has an upper case and an oscillation coil which is disposed on the outer periphery of the upper case and is pressed by the operating rod A. A metal ring capable of moving toward and away from the oscillation coil from an axial direction, a magnetic member support provided on the upper case, receiving a compression coil spring, and being movable in the axial direction of the oscillation coil by pressing the operating rod B; A magnetic member having a bamboo cylinder (a cylinder having a substantially H-shaped cross section), a cup (a cylinder having a substantially concave cross section) or a hollow cylinder supported by a member support; An oscillating coil supported by a diaphragm reinforcing plate such that a round hole faces an opening of the magnetic member; and a diaphragm reinforcing plate movable in the upper case in an axial direction of the oscillating coil in the upper case in conjunction with displacement of the diaphragm. And the magnetic member support and the magnetic member support. A compression coil spring that constantly urges the diaphragm reinforcing plate and a gas pressure in the pressure receiving chamber displaces in the axial direction of the oscillation coil and is disposed below the diaphragm reinforcing plate and is disposed in the upper case and the lower case. A circular diaphragm to be clamped, and a lower case that fits with the upper case, has a gas inlet, and forms a pressure receiving chamber together with the diaphragm;
Consists of

The third embodiment of the displacement detecting unit is of a type having no magnetic member support. The displacement detecting unit has an upper case and an operating coil disposed on the outer peripheral portion of the upper case by pressing the operating rod A. A metal ring capable of moving toward and away from the oscillation coil from the axial direction, and a bamboo cylinder, cup-shaped or A hollow cylindrical magnetic member, an oscillating coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and an oscillation coil interlocked with the displacement of the diaphragm. A diaphragm reinforcing plate movable in the case in the axial direction of the oscillation coil, a compression coil spring that constantly urges the magnetic member and the diaphragm reinforcement plate, and the oscillation coil by gas pressure in a pressure receiving chamber. In the axial direction of A circular diaphragm disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case; and a lower case fitted with the upper case and having a gas inlet and forming a pressure receiving chamber together with the diaphragm. , Consisting of

In the fourth embodiment of the displacement detecting section, the magnetic member is formed in a cylindrical shape having a screw groove (male screw or female screw) on the outer peripheral wall (for example, rotated with a hexagon wrench, a plus or minus screwdriver, etc.). It is good to provide a groove which can be formed in a substantially central portion.) A type in which the initial oscillation frequency can be adjusted and the spring constant of the medium-diameter compression coil spring is not adjusted, and is provided on the upper case and the outer peripheral portion of the upper case. A metal ring which can be moved toward and away from the oscillation coil from the axial direction of the oscillation coil by pressing the operating rod A, and a magnetic member provided on the upper case and which can be moved in the axial direction of the oscillation coil by pressing the operating rod B; A mold support, a magnetic member of a screw-shaped column (including a column having a substantially convex cross section, etc.) supported by the magnetic member screw-type support, and a winding hole, wherein the winding hole is formed of the magnetic material. Diaphragm reinforcement plate so as to face the bottom wall of the member The oscillation coil to be supported, the diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and the magnetic member screw-type support and the diaphragm reinforcing plate A resiliently urged compression coil spring, and a circular diaphragm which is displaced in the axial direction of the oscillation coil due to gas pressure in the pressure receiving chamber and is disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case. And a lower case which is fitted with the upper case, has a gas inlet, and forms a pressure receiving chamber together with the diaphragm.

The function of the displacement detecting section according to the second embodiment is as follows. The operation of the operating rod A which is disposed on the outer periphery of the washing tub and engages with the detecting rod for detecting a swing collision by eccentric rotation of the washing tub. A swing detection function in which a change in the LC oscillation frequency is obtained by a metal ring that is displaced by pressing, and a door in which a change in the LC oscillation frequency is obtained by a magnetic member that is displaced by pressing the operating rod B that engages a door of a washing machine or the like. An open / close detection function and a water level detection function capable of obtaining a change in LC oscillation frequency by an oscillation coil displaced by the gas pressure of the pressure receiving chamber are provided.

Alternatively, a change in the LC oscillation frequency can be attained by a magnetic member which is displaced by pressing the operating rod B which is disposed on the outer periphery of the washing tub and engages with a detection rod which detects a swing collision by eccentric rotation of the washing tub. The swing detection function obtained, the door opening / closing detection function in which a change in the LC oscillation frequency is obtained by the metal ring displaced by pressing the operating rod A engaged with the door of the washing machine, etc., and the displacement due to the gas pressure in the pressure receiving chamber A water level detecting function for obtaining a change in the LC oscillation frequency by the oscillation coil.

As a second operation of the displacement detecting portion, the displacement is changed by a metal ring and / or a magnetic member displaced by pressing the operating rods A and / or B, or an oscillating coil displaced by the gas pressure of the pressure receiving chamber. The LC oscillation frequency Fin is compared with a plurality of predetermined determination frequencies Fde to calculate the amount of displacement of the LC oscillation frequency Fin.

In both the first and second embodiments of the displacement detecting section, the oscillation frequency band Fin0 obtained by detecting the opening and closing of the door, the oscillation frequency band Fin1 obtained by detecting the swing of the washing tub, and the water level of the washing tub are obtained. The oscillation frequency band Fin2 is output so as not to overlap.

[0026]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of the displacement detecting section 11 of the first embodiment of the present invention when the diaphragm 47 is not displaced, and FIG. 2 is a multifunctional displacement sensor of the first embodiment of the present invention. Diaphragm 47 of displacement detector 11
FIG. 3 is a front sectional view at the time of maximum displacement. The multifunctional displacement sensor displacement detection unit 11 of the first embodiment of the present invention includes an upper case (for example, a resin molded member such as PP resin) 20 and a compression coil spring adjusting screw (for example, A compression molding spring adjustment screw 30 provided on the upper case 20, and the oscillation coil 4 is pressed by pressing the operating rod 90.
Magnetic member support (for example, PP)
A resin molded member such as resin) 31 (having a screw portion 32 on the inner peripheral wall); a hollow cylindrical magnetic member (eg, a ferrite core) 34 supported by the magnetic member support 31; And the diaphragm reinforcing plate 44 (46) so that the winding hole 41 faces the opening 35 of the magnetic member 34.
The oscillation coil 40 supported by the
A diaphragm reinforcing plate (eg, a resin molded member such as a POM resin) 44 (46) movable in the upper case 20 in the axial direction of the oscillation oscillation coil 40 in conjunction with the displacement of the upper case 20;
A compression coil spring (for example, a stainless steel wire or the like) 33 that constantly urges the compression coil spring adjusting screw 30 and the diaphragm reinforcing plate 44 (46), and is provided in, for example, a washing tub of a washing machine or the like. The diaphragm reinforcing plate 44 is displaced in the axial direction of the oscillation coil 40 by the gas pressure of the air in the pressure receiving chamber 24 led from the air trap.
(46), the upper case 20 and the lower case 2
5 and a lower case (for example, PP) which fits with the upper case 20 and has the gas inlet 23 to form the pressure receiving chamber 24 together with the diaphragm 47. Resin molded members such as resin)
25.

The upper case 20 and the lower case 25 are not only fixed by a conventional winding frame, but also, for example, are provided with a convex portion on the upper case 20 and a concave portion on the lower case 25, and are hooked, screwed, and press-fitted. Preferably, the upper case 20 and the lower case 25 are fixed by ultrasonic welding, heat welding, adhesive fixing, clip material fixing, or the like. The direction of the gas inlet 23 of the lower case 25 may be arbitrary. Usually, a tube (a soft material,
For example, vinyl tubes, rubber tubes, silicone tubes, etc.) may be connected (for example, metal spring materials such as clamps, binds, etc., or may be reinforced by applying an adhesive, etc.), for example, washing in a washing machine. It is good to pipe between the air trap provided in the tank.

The magnetic member support 31 may be fixed to the upper case 20 (for example, screwing, press-fitting, ultrasonic welding, heat welding, adhesive fixing, clip material fixing), or a compression coil spring 33. It does not need to be fixed because it is always fired. Further, the magnetic member 34 may be hooked (for example, hooked with a claw-shaped member), housed (for example, inserted into a concave portion), or sealed (for example, integrally formed).

The oscillation coil 40 may be formed by winding a copper wire around the bobbin 43 and detaching it from the bobbin 43, or attaching the copper wire together with the bobbin 43 to the diaphragm reinforcing plate 44, or by attaching the copper wire to the diaphragm reinforcing plate 46 having the bobbin portion 45. A copper wire may be wound directly around the bobbin part 45. For example, a flexible wiring member 54 or the like is provided from the oscillation coil 40 to an output terminal portion 51 provided in the upper case 20 (when it is formed in a connector housing, it is easy to hang with a connector such as an external wiring cable). (For example, soldering, fusing, spot welding, or laser welding), or the copper wire of the oscillation coil 40 may be directly connected.

An LC oscillation circuit section employed in the displacement sensor according to the present invention (see FIG. 15; it may be provided on the displacement detection section 11 side, or a printed wiring board which controls the electrical control of a washing machine or the like equipped with the displacement sensor). May be provided on the side.) 19 used an oscillator coil 40, a capacitor 50, and an unbuffer-type inverter IC that outputs a square wave oscillation.

The capacitor 50 may be connected to the oscillation coil 40, may be connected to the output terminal 51, or may be connected to the printed wiring board which controls the electrical control of a washing machine or the like having a displacement sensor. May be connected.

For example, in the case where a home electric appliance or the like having a displacement sensor is installed in a place where the use environment of the displacement sensor is not good (for example, a bathtub) at 100% humidity or the like, the oscillation coil 40 and the capacitor 50 may be used. Is filled with an electrically insulating filler (for example, polyester resin, epoxy resin, silicone resin, urethane resin) 52 or an electrically insulating material (for example, polyester resin, epoxy resin, silicone resin) for waterproofing, moisture proofing and dew condensation measures. It is also preferable to apply an adhesive sealing material such as urethane resin or the like, including a waterproofing material, a moisture-proofing material, and a dew-condensing material of other materials.) 53 is preferably applied.

As the diaphragm 47, a diaphragm mainly made of EPDM (ethylene propylene rubber) having a temperature characteristic of positive temperature change (hardness decreases at a low temperature and increases at a high temperature) is used. For example, as disclosed in Japanese Patent Publication No. 6-54275, a temperature characteristic having a negative capacitance change rate (ambient temperature:
Using a polypropylene film dielectric type (PP) capacitor of which capacitance increases at low temperature and decreases at high temperature)
For example, in the LC oscillation circuit disclosed in Japanese Patent Publication No. 5-43398, it is preferable that the oscillation frequency at a certain water level of a washing machine or the like be substantially constant regardless of the ambient temperature. Alternatively, a diaphragm mainly composed of Si (silicon) having a flat rate of change in hardness and a ceramic capacitor having a flat rate of change in capacitance may be used.

As a reference, a plurality of ring-shaped small projections (see, for example, Japanese Unexamined Utility Model Publication No. Sho 51-17749) are conventionally provided on the entire surface of the central portion of the diaphragm 47 as a technique for improving the adhesion failure. Beads 48 are provided, and a plurality of projections 26 are provided on the lower surface of the lower case 25 corresponding thereto, so that the contact area between the lower case 25 and the pressure receiving surface, which is the lower part of the diaphragm 47, may be minimized. .

FIG. 3 is a front sectional view when the magnetic member 34 of the multifunctional displacement sensor displacement detecting section 11 according to the first embodiment of the present invention is pressed by the operating rod 90. The multifunctional displacement sensor according to the first embodiment of the present invention, which is constituted by the displacement detection unit 11 and the LC oscillation circuit unit 19 as described above, is disposed on the outer periphery of the washing tub and operates by eccentric rotation of the washing tub. A swing detection function in which the magnetic body 34 moves toward and away from the oscillation coil 40 in conjunction with the operating rod 90 that engages with a detection rod that detects a swing collision, and air is detected based on the level of water supplied to the washing tub. The diaphragm 4 in which air in the trap is compressed and displaced under pressure by the gas pressure
7, a water level detecting function in which the oscillation coil 40 moves toward and away from the magnetic body 34 in conjunction with the control unit 7.

Alternatively, a door open / close detecting function in which the magnetic body 34 moves toward and away from the oscillating coil 40 in conjunction with the operating rod 90 which engages with a door of a washing machine, a dishwasher, or the above-mentioned electric device, The air in the air trap is compressed by the water level of the water supplied to the water tub such as the washing tub and the electric equipment, and the oscillation coil 40 is connected to the magnetic body 34 in conjunction with the diaphragm 47 which is displaced by the gas pressure. And a function of detecting a moving water level.

FIG. 8 is a diagram showing the relationship between the frequency Fin at which the multifunctional displacement sensor of the present invention oscillates and outputs, and a plurality of predetermined determination frequencies Fde. The operation is such that the LC oscillation frequency Fin changed by the magnetic member 34 displaced by the pressing of the operating rod 90 or the oscillation coil 40 displaced by the gas pressure of the pressure receiving chamber 24 becomes a plurality of predetermined determination frequencies Fde.
The amount of displacement is calculated by comparing the height with the height.

That is, the oscillation frequency band Fin0 obtained by detecting the opening / closing of the door or the oscillation frequency band Fin1 obtained by detecting the swing of the washing tub does not overlap the oscillation frequency band Fin2 obtained by detecting the water level of the washing tub. Output to More specifically, when detecting the displacement of the opening / closing state of the door of the washing machine or the like, for example, the oscillation frequency that changes when the metal ring 93 moves toward or away from the oscillation coil 40 in conjunction with the opening / closing of the door of the washing machine or the like. This is performed by comparing the level of Fin0 with the determination frequency Fde0. In addition, when detecting the displacement of the eccentric rotation state of the washing tub such as a washing machine, for example, in conjunction with a detection rod that is disposed on the outer peripheral portion of the washing tub and detects a swing collision by the eccentric rotation of the washing tub. The magnetic member 34 is connected to the oscillation coil 40.
The comparison is made by comparing the level of the oscillation frequency Fin1 that changes as a result of moving away from and with the determination frequency Fde1. Further, when detecting the displacement of the water level in the washing tub, the oscillation coil 40 operates in conjunction with the diaphragm 47, which compresses the air in the air trap according to the water level of the water supplied to the washing tub and receives and displaces the pressure by the gas pressure. .. Are compared by comparing the oscillation frequency Fin2 that changes by moving toward and away from the magnetic member 34 with a plurality of determination frequencies Fde2-1, Fde2-2, Fde2-3. As a result, the memory capacity of a microcomputer or the like mounted on a printed wiring board that controls the electrical control of a washing machine or the like equipped with a displacement sensor can be saved, and the oscillation frequency can be treated as an absolute value (the measured frequency value itself). A control system can now be built.

FIG. 4 is a front sectional view of the displacement detecting section 12 of the multifunctional displacement sensor 12 according to the second embodiment of the present invention when the diaphragm 47 is not displaced. FIG. 5 is a multifunctional displacement sensor according to the second embodiment of the present invention. FIG. 4 is a front cross-sectional view of the mold displacement sensor when the diaphragm 47 of the displacement detection unit 12 is at the maximum displacement. The multifunction displacement sensor displacement detection unit 12 according to the second embodiment of the present invention includes an upper case (for example,
20) and the upper case 20
Oscillation coil 4 is arranged on the outer periphery of
A metal ring (for example, an iron plate, a stainless plate, a copper plate, an aluminum plate, a titanium plate, a magnesium plate and / or a composite heavy plate, or an alloy thereof) that can move toward and away from the oscillation coil 40 from the 0 axis direction.
93 (in this embodiment, for example, a resin molded member such as PP resin or the like is used as a composite part to improve wear resistance), and a compression coil spring adjusting screw for receiving the compression coil spring 33 (for example, PP resin or the like) Resin molded member) 30
The compression coil spring adjusting screw 30 provided on the upper case 20 can be screwed to the operating rod B90 (in this embodiment, for example, a sliding member 94 made of a resin molded member such as PP resin is interposed. A magnetic member support (for example, a resin molded member such as a PP resin) 31 (having a threaded portion 32 on the inner peripheral wall) that can be moved in the axial direction of the oscillation coil 40 by pressing the abrasion resistance. A hollow cylindrical magnetic member (eg, ferrite core) 34 supported by the magnetic member support 31 and a winding hole 41 having the winding hole 41 facing the opening 35 of the magnetic member 34. Coil 40 supported by the diaphragm reinforcing plate 44 (46) as described above, and a diaphragm reinforcing plate (for example, POM) movable in the upper case 20 in the axial direction of the oscillation coil 40 in conjunction with the displacement of the diaphragm 47. Tree Resin molded member or the like) 44 and the like (4
6) a compression coil spring (for example, a stainless steel wire or the like) that constantly urges the compression coil spring adjusting screw 30 and the diaphragm reinforcing plate 44 (46);
3 and the lower part of the diaphragm reinforcing plate 44 (46) which is displaced in the axial direction of the oscillation coil 40 by the gas pressure of the air in the pressure receiving chamber 24 guided from an air trap provided in a washing tub of a washing machine or the like. And a circular diaphragm (eg, rubber or stainless steel plate) 47 sandwiched between the upper case 20 and the lower case 25, and having a gas inlet 23 fitted with the upper case 20 and receiving pressure with the diaphragm 47. Room 2
4 and a lower case (for example, a resin molded member such as a PP resin) 25 for forming the same. The details of each component are the same as those of the displacement detection unit 11 of the displacement sensor according to the first embodiment of the present invention, and thus description thereof is omitted.

FIG. 6 is a front sectional view when the metal ring 93 of the displacement detecting unit 12 of the multifunctional displacement sensor according to the second embodiment of the present invention is pressed by the operating rod A91, and FIG. Magnetic Member 34 of Multifunctional Displacement Sensor Displacement Detector 12 of Embodiment
FIG. 7 is a front sectional view when is pressed by a operating rod B91. The multifunctional displacement sensor according to the second embodiment of the present invention, which is constituted by the displacement detecting section 12 and the LC oscillation circuit section 19 as described above, is disposed on the outer peripheral portion of the washing tub and rotates by the eccentric rotation of the washing tub. A swing detection function in which the metal ring 93 moves toward and away from the oscillation coil 40 in conjunction with a Kong rod A91 engaged with a detection rod for detecting a swing collision, and a Kong rod engaged with a door of a washing machine or the like. The door opening / closing detection function in which the magnetic body 34 moves in and out of the oscillation coil 40 in conjunction with B90, and the air in the air trap is compressed by the water level of the water supplied to the washing tub, and is subjected to pressure receiving displacement by the gas pressure. A water level detecting function in which the oscillation coil 40 moves toward and away from the magnetic body 34 in conjunction with the diaphragm 47.

Alternatively, the operating rod A engaged with the door of a washing machine or the like
A door opening / closing detection function in which the metal ring 93 moves toward and away from the oscillation / oscillation coil 40 in conjunction with 91, and a detection rod disposed on the outer periphery of the washing tub and detecting oscillating collision by eccentric rotation of the washing tub. The air in the air trap is compressed by the swing detection function in which the magnetic body 34 moves in and out of the oscillation coil 40 in conjunction with the operating rod B90 engaged with the A water level detecting function is provided in which the oscillation coil 40 moves toward and away from the magnetic body 34 in conjunction with the diaphragm 47 that receives and displaces pressure due to gas pressure.

The action of the LC oscillation is changed by the metal ring 93 displaced by the pressing of the operating rod A91, the magnetic member 34 displaced by the pressing of the operating rod B90, or the oscillation coil 40 displaced by the gas pressure of the pressure receiving chamber 24. The displacement of the frequency Fin is calculated by comparing the height with a plurality of preset determination frequencies Fde.

That is, the oscillation frequency band Fin0 obtained by detecting the opening and closing of the door, the oscillation frequency band Fin1 obtained by detecting the swing of the washing tub, and the oscillation frequency band Fin2 obtained by detecting the water level of the washing tub do not overlap. Output. More specifically, when detecting the displacement of the opening / closing state of the door of the washing machine or the like, for example, the oscillation frequency that changes when the metal ring 93 moves toward or away from the oscillation coil 40 in conjunction with the opening / closing of the door of the washing machine or the like. This is performed by comparing the level of Fin0 with the determination frequency Fde0. In addition, when detecting the displacement of the eccentric rotation state of the washing tub such as a washing machine, for example, in conjunction with a detection rod that is disposed on the outer peripheral portion of the washing tub and detects a swing collision by the eccentric rotation of the washing tub. The comparison is made between the oscillation frequency Fin1 that changes when the magnetic member 34 moves toward and away from the oscillation coil 40 and the determination frequency Fde1. Further, when detecting the displacement of the water level in the washing tub, the oscillation coil 40 operates in conjunction with the diaphragm 47, which compresses the air in the air trap according to the water level of the water supplied to the washing tub and receives and displaces the pressure by the gas pressure. Oscillation frequency Fin2 that changes by moving toward and away from magnetic member 34 and a plurality of determination frequencies F
.., Fde2-2, Fde2-3,... As a result, the memory capacity of a microcomputer or the like mounted on a printed wiring board that controls the electrical control of a washing machine or the like equipped with a displacement sensor can be saved, and the oscillation frequency can be treated as an absolute value (the measured frequency value itself). A control system can now be built.

FIG. 9 is a front sectional view of the multifunction displacement sensor displacement detecting section 13 according to the third embodiment of the present invention when the diaphragm 47 is not displaced. The displacement detecting section 13 of the multifunctional displacement sensor according to the third embodiment of the present invention is a type in which the spring constant of the compression coil spring 33 is not adjusted, and the upper case (for example, P
A resin molding member 20 such as a P resin) and a compression rod spring 33 provided on the upper case 20 for receiving the compression coil spring 33.
Magnetic member support (for example, resin molded member such as PP resin) 36 that can move in the axial direction of oscillation coil 40 by pressing 0
(Having a threaded portion 32 on the inner peripheral wall) and a bamboo cylinder, cup, or hollow cylinder supported by the magnetic member support 36 (for example, a substantially convex shape disclosed in Japanese Utility Model Registration No. 30444686). A magnetic member (for example, a ferrite core) 34 and a winding hole 41.
And an oscillation coil 40 supported by a diaphragm reinforcing plate 44 (46) such that the winding hole 41 faces the opening 35 of the magnetic member 34, and the upper case 20 interlocked with the displacement of the diaphragm 47. A diaphragm reinforcing plate (for example, a resin molded member such as a POM resin) 44 (46) movable in the axial direction of the oscillation coil 40, and the magnetic member support 3
6 and the diaphragm reinforcing plate 44 (46) are constantly resiliently biased by a compression coil spring (for example, a stainless steel wire) 33 and an air trap provided in a washing tub of a washing machine or the like. A circular diaphragm which is displaced in the axial direction of the oscillation coil 40 by the gas pressure of the air in the pressure receiving chamber 24 and is disposed below the diaphragm reinforcing plate 44 (46) and is sandwiched between the upper case 20 and the lower case 25. (For example, rubber or stainless steel plate) 47 and a lower case (for example, a resin molded member such as a PP resin or the like) which fits with the upper case 20, has the gas inlet 23, and forms the pressure receiving chamber 24 together with the diaphragm 47. 25. The details, functions, and operations of each component other than the compression coil spring adjusting screw are the same as those of the displacement detection unit 11 of the displacement sensor according to the first embodiment of the present invention (however, the magnetic member support 31 is a magnetic member support). It is to be read as the body 36.)

FIG. 10 is a front sectional view of the multifunctional displacement sensor displacement detecting section 14 according to the fourth embodiment of the present invention when the diaphragm 47 is not displaced. The multifunctional displacement sensor according to the fourth embodiment of the present invention includes a displacement detecting section 14 which includes a compression coil spring 33.
The type that does not adjust the spring constant of the upper case (for example,
20) and the upper case 20
Oscillation coil 4 is arranged on the outer periphery of
A metal ring (for example, an iron plate, a stainless plate, a copper plate, an aluminum plate, a titanium plate, a magnesium plate and / or a composite heavy plate, or an alloy thereof) that can move toward and away from the oscillation coil 40 from the 0 axis direction.
93 (in the present embodiment, for example, formed as a composite part with a resin molded member such as PP resin to improve wear resistance) and a compression coil spring 33 provided on the upper case 20.
In the present embodiment, for example, a sliding member 94 made of a resin molded member such as PP resin is interposed.
Improved wear resistance. ), A magnetic member support (for example, a resin molded member such as a PP resin) 36 (having a threaded portion 32 on the inner peripheral wall) that can move in the axial direction of the oscillation coil 40 and the magnetic member support 36 Supported bamboo cylinders, cups or hollow cylinders (for example, registered utility model 3
It may be an annular cylinder having a substantially convex cross-section disclosed in Japanese Patent No. 0446686. ), And a winding hole 41, which is supported by the diaphragm reinforcing plate 44 (46) so that the winding hole 41 faces the opening 35 of the magnetic member 34. The oscillation coil 40 and a diaphragm reinforcing plate (for example, a resin molded member such as a POM resin) 44 (4) that is movable in the upper case 20 in the axial direction of the oscillation coil 40 in conjunction with the displacement of the diaphragm 47.
6), a compression coil spring (for example, stainless steel wire or the like) 33 which constantly and elastically urges the magnetic member support 36 and the diaphragm reinforcing plate 44 (46);
The oscillating coil 4 is driven by the gas pressure of the air in the pressure receiving chamber 24 guided from an air trap provided in a washing tub of a washing machine or the like.
The diaphragm reinforcing plate 44 (46) is displaced in the axial direction of zero.
A circular diaphragm (for example, rubber or stainless steel plate) 47 which is disposed below the upper case 20 and is sandwiched between the lower case 25 and the upper case 20 and has a gas inlet 23 and the diaphragm 47. And a lower case (for example, a resin molded member such as a PP resin) 25 forming a pressure receiving chamber 24.
And, it consisted of. The details, functions, and operations of each component other than the compression coil spring adjusting screw are the same as those of the displacement detection unit 12 of the displacement sensor according to the second embodiment of the present invention (however, the magnetic member support 31 is a magnetic member support). It is to be read as the body 36.)

Although not shown, the displacement detecting section 15 of the multifunctional displacement sensor according to the fifth embodiment of the present invention is different from the displacement detecting section 13 of the displacement sensor according to the third embodiment in that the magnetic member support 36 is provided.
The upper case (for example, a resin molded member such as PP resin) 20 and a compression coil spring 33 provided on the upper case 20 receive the compression coil spring 33 and are pushed in the axial direction of the oscillation coil 40 by the pressing of the rod 90. Movable bamboo cylinder, cup or hollow cylinder (for example, registered utility model No. 30446)
An annular cylinder having a substantially convex cross-section disclosed in Japanese Patent Publication No. 86 may be used. ) Magnetic member (eg, ferrite core) 3
7 and a winding hole 41 having the magnetic member 37.
Diaphragm reinforcing plate 44 so as to face opening 35 of
The oscillation coil 40 supported by (46) and a diaphragm reinforcing plate (for example, a resin molded member such as a POM resin) which can move in the upper case 20 in the axial direction of the oscillation coil 40 in conjunction with the displacement of the diaphragm 47. Etc.) 44 (46),
A compression coil spring (for example, a stainless steel wire or the like) 33 that constantly urges the magnetic member 37 and the diaphragm reinforcing plate 44 (46), and an air provided in a washing tub of a washing machine or the like, for example. Pressure receiving chamber 2 guided from trap
4 is displaced in the axial direction of the oscillating coil 40 due to the gas pressure of the air, and is disposed below the diaphragm reinforcing plate 44 (46) and is sandwiched between the upper case 20 and the lower case 25 (for example, rubber). , A stainless steel plate) 47 and a lower case (for example, a resin molded member such as PP resin) 25 which fits with the upper case 20 and has the gas inlet 23 and forms the pressure receiving chamber 24 together with the diaphragm 47. Configured. When there is no possibility that the magnetic member 34 of the displacement detecting unit 13 of the displacement sensor of the third embodiment is damaged, the shape of the magnetic member 34 in the shape of a bamboo cylinder, a cup, or a hollow cylinder is supported by the magnetic member. If the compression coil spring 33 is received only by the magnetic member 37 having the changed shape, the magnetic member support 36 need not be provided. Details, functions, and operations of each component other than the magnetic member support are substantially the same as those of the displacement sensor 13 and the like of the displacement sensor according to the third embodiment of the present invention, and will not be described.

Although not shown, the displacement detecting section 16 of the multifunctional displacement sensor according to the sixth embodiment of the present invention is different from the displacement detecting section 14 of the displacement sensor according to the fourth embodiment in that a magnetic member support 36 is provided.
The upper case (for example, a resin molded member such as a PP resin) 20 and an oscillation coil 40 which is disposed on the outer periphery of the upper case 20 and which is pressed from the operating member A91 from the axial direction of the oscillation coil 40. (Eg, an iron plate, a stainless steel plate, a copper plate, an aluminum plate, a titanium plate, a magnesium plate and / or a composite heavy plate thereof, and an alloy thereof) 93 (in this embodiment, for example, a resin such as a PP resin) A molded part and a composite part are used to improve the wear resistance.)
The compression coil spring 33 provided at the upper portion receives the compression coil spring 33 and presses the operating member B90 (in this embodiment, abrasion resistance is improved by interposing a sliding body 94 made of a resin molded member such as PP resin, for example). , A bamboo cylinder, a cup, or a hollow cylinder (for example, an annular cylinder having a substantially convex cross-section disclosed in Japanese Utility Model Registration No. 30444686) that is movable in the axial direction of the oscillation coil 40. An oscillation coil having a magnetic member (for example, a ferrite core) 37 and a wound hole 41 supported by a diaphragm reinforcing plate 44 (46) so that the wound hole 41 faces the opening 35 of the magnetic member 37. And a diaphragm reinforcing plate (for example, a resin molded member such as a POM resin) 44 (46) movable in the upper case 20 in the axial direction of the oscillation coil 40 in conjunction with the displacement of the diaphragm 47. A compression coil spring (for example, a stainless steel wire or the like) 33 that constantly urges the magnetic member 37 and the diaphragm reinforcing plate 44 (46), and an air provided in a washing tub of a washing machine or the like, for example. The diaphragm reinforcing plate 4 is displaced in the axial direction of the oscillation oscillation coil 40 by the gas pressure of the air in the pressure receiving chamber 24 led from the trap.
4 (46), a circular diaphragm (for example, rubber or stainless steel plate) 47 sandwiched between the upper case 20 and the lower case 25, and a gas inlet 23 fitted to the upper case 20. A lower case (for example, a resin molded member such as a PP resin) 25 that forms the pressure receiving chamber 24 together with the diaphragm 47 is constituted. When there is no possibility that the magnetic member 34 of the displacement detecting unit 14 of the displacement sensor of the fourth embodiment is damaged, the shape of the magnetic member 34 in the form of a bamboo cylinder, a cup, or a hollow cylinder is supported by the magnetic member. If the compression coil spring 33 is received only by the magnetic member 37 having the changed shape, the magnetic member support 36 need not be provided. Regarding the details, functions, and operations of each component except the magnetic member support, the displacement detection unit 1 of the displacement sensor according to the fourth embodiment of the present invention is described.
4 and the like, and a description thereof will be omitted.

FIG. 11 is a front sectional view of the multifunction displacement sensor displacement detecting section 17 according to the seventh embodiment of the present invention when the diaphragm 47 is not displaced. The multifunctional displacement sensor displacement detecting section 17 of the seventh embodiment of the present invention is configured such that the magnetic member 65 is formed in a cylindrical shape having a screw groove (male screw or female screw) on the outer peripheral wall (for example, a hexagon wrench, a plus or minus driver, etc.). It is preferable to provide a groove which can be rotated at a substantially central portion of the upper case (for example, PP) in which the initial oscillation frequency can be adjusted and the spring constant of the middle-diameter compression coil spring 67 is not adjusted.
A resin molded member 20 such as a resin) and a mandrel 90 receiving a compression coil spring 67 provided on the upper case 20.
A magnetic member screw-type support that can move in the axial direction of the oscillation coil 40 by pressing (for example, a resin molded member such as a PP resin).
69 and a magnetic member of a threaded column supported on the magnetic member screw-type support 69 (for example, a ferrite core formed in a cylindrical shape having a thread groove on the outer peripheral wall. Also, for example, a hexagon wrench, plus or minus, It is preferable to provide a groove which can be rotated by a driver or the like at a substantially central portion.) 65, and a diaphragm reinforcing plate having a winding hole 41 so that the winding hole 41 faces the bottom wall 66 of the magnetic member 65. An oscillation coil 40 supported by 44 (46) and a diaphragm reinforcing plate (for example, a resin molding such as POM resin) that can move in the upper case 20 in the axial direction of the oscillation coil 40 in conjunction with the displacement of the diaphragm 47 44) and the magnetic member screw-type support 69
And a middle-diameter compression coil spring (for example, stainless steel wire) 67 which constantly urges the diaphragm reinforcing plate 44 (46) and an air trap provided in a washing tub of a washing machine or the like. A circular shape which is displaced in the axial direction of the oscillation coil 40 by the introduced gas pressure of the air in the pressure receiving chamber 24, is disposed below the diaphragm reinforcing plate 44 (46), and is sandwiched between the upper case 20 and the lower case 25. A diaphragm (eg, rubber or stainless steel plate) 47 and the upper case 2
And a lower case (for example, a resin molded member such as PP resin) 25 having a gas introduction port 23 and having a pressure receiving chamber 24 together with the diaphragm 47. The details, functions, and operations are substantially the same as those of the above-described embodiments and the like, and thus will not be described.

FIG. 12 is a front sectional view of the multifunction displacement sensor displacement detector 18 according to the eighth embodiment of the present invention when the diaphragm 47 is not displaced. The multifunctional displacement sensor displacement detecting section 18 of the eighth embodiment of the present invention is configured such that the magnetic member 65 is formed in a cylindrical shape having a screw groove (male screw or female screw) on the outer peripheral wall (for example, a hexagon wrench, a plus or minus screwdriver, etc.). It is preferable to provide a groove which can be rotated at a substantially central portion of the upper case (for example, PP) in which the initial oscillation frequency can be adjusted and the spring constant of the middle-diameter compression coil spring 67 is not adjusted.
A metal ring (eg, an iron plate) that is disposed on the outer periphery of the upper case 20 and that can be moved toward and away from the oscillation coil 40 in the axial direction of the oscillation coil 40 by pressing the operating rod A91. , Stainless steel plate, copper plate, aluminum plate, titanium plate,
Magnesium plate and / or composite heavy plate, alloy) 93
(In the present embodiment, for example, a resin molded member such as PP resin or the like is used as a composite part to improve wear resistance.) In the present embodiment, for example, the wear resistance is improved by interposing a sliding body 94 made of a resin molded member such as a PP resin.) A magnetic member screw that can move in the axial direction of the oscillation coil 40 when pressed. A wearable support (for example, a resin molded member such as PP resin) 69 and a magnetic member of a threaded column supported by the magnetic member screw-on support 69 (for example, a cylindrical shape having a thread groove on the outer peripheral wall) Ferrite core formed on
Further, for example, a groove that can be rotated by a hexagon wrench, a plus or minus screwdriver, or the like may be provided substantially at the center. ) 65
And a diaphragm reinforcing plate 44 having a winding hole 41 such that the winding hole 41 faces the bottom wall 66 of the magnetic member 65.
The oscillation coil 40 supported by (46) and a diaphragm reinforcing plate (for example, a resin molded member such as a POM resin) which can move in the upper case 20 in the axial direction of the oscillation coil 40 in conjunction with the displacement of the diaphragm 47. Etc.) 44 (46),
The magnetic member screwing type support 69 and the diaphragm reinforcing plate 4
And a pressure receiving chamber guided from an air trap provided in a washing tub of a washing machine, for example. 24, the diaphragm reinforcing plate 44 is displaced in the axial direction of the oscillation coil 40 by the gas pressure of air.
(46), the upper case 20 and the lower case 2
5 and a lower case (for example, PP) which fits with the upper case 20 and has the gas inlet 23 to form the pressure receiving chamber 24 together with the diaphragm 47. Resin molded members such as resin)
25. In details, functions and actions,
The description is omitted because it is substantially the same as the above-described embodiment.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and many combinations and modifications can be made without departing from the spirit of the invention. Of course it can be done. For example,
Although the multifunctional displacement sensor has been described by taking the washing machine as an example up to the prior art and the embodiments of the present invention, it goes without saying that the washing machine can be replaced, modified, or applied with the electric device or the like.

[0051]

According to the displacement sensor of the present invention,
The functions of water level detection, swing detection, and door open / close detection are integrated (combined), which is advantageous in terms of cost.

[Brief description of the drawings]

FIG. 1 is a front cross-sectional view of a multifunctional displacement sensor displacement detection unit according to a first embodiment of the present invention when a diaphragm is not displaced.

FIG. 2 is a front cross-sectional view of the multifunction displacement sensor displacement detection unit according to the first embodiment of the present invention when the diaphragm is maximally displaced.

FIG. 3 is a front cross-sectional view when the magnetic member of the displacement detecting unit of the multifunctional displacement sensor according to the first embodiment of the present invention is pressed by the operating rod.

FIG. 4 is a front cross-sectional view of the multifunction displacement sensor displacement detection unit according to a second embodiment of the present invention when the diaphragm is not displaced.

FIG. 5 is a front sectional view of the displacement detector of the multifunctional displacement sensor according to the second embodiment of the present invention when the diaphragm is maximally displaced.

FIG. 6 is a front cross-sectional view when a metal ring of a multifunctional displacement sensor displacement detecting unit according to a second embodiment of the present invention is pressed by a moving rod A;

FIG. 7 is a front cross-sectional view when the magnetic member of the displacement detecting unit of the multifunctional displacement sensor according to the second embodiment of the present invention is pressed by the operating rod B;

FIG. 8 is a diagram showing a relationship between a frequency Fin at which the multifunctional displacement sensor of the present invention oscillates and outputs, and a plurality of predetermined determination frequencies Fde.

FIG. 9 is a front cross-sectional view of the multifunction displacement sensor displacement detection unit according to the third embodiment of the present invention when the diaphragm is not displaced.

FIG. 10 is a front cross-sectional view of the multifunction displacement sensor displacement detection unit according to a fourth embodiment of the present invention when the diaphragm is not displaced.

FIG. 11 is a front cross-sectional view of the multifunctional displacement sensor displacement detection unit according to a seventh embodiment of the present invention when the diaphragm is not displaced.

FIG. 12 is a front cross-sectional view of the multifunction displacement sensor displacement detection unit according to an eighth embodiment of the present invention when the diaphragm is not displaced.

FIG. 13 is a reference perspective view of a conventional displacement sensor displacement detector.

FIG. 14 is a front sectional view of a conventional displacement sensor displacement detector.

FIG. 15 is an LC oscillation circuit section employed in the displacement sensor according to one embodiment.

[Explanation of symbols]

10: Displacement sensor according to one embodiment of the related art, 11: Displacement sensor displacement detection unit according to the first embodiment of the present invention, 12 ... Displacement sensor displacement detection unit according to the second embodiment of the present invention, 13: Third displacement of the present invention Displacement sensor displacement detector of the embodiment, 14 ... Displacement sensor displacement detector of the fourth embodiment of the present invention, 15 ... Displacement sensor displacement detector of the fifth embodiment of the present invention, 16 ... Sixth embodiment of the present invention Displacement sensor displacement detector, 17 ... displacement sensor displacement detector of the seventh embodiment of the present invention, 18 ... displacement sensor displacement detector of the eighth embodiment of the present invention, 19 ... LC oscillation circuit unit, 20 ... upper case , 21: screw portion, 22: air chamber, 23: gas inlet, 24: pressure receiving chamber, 25: lower case, 26: projection,
Reference numeral 30: compression coil spring adjusting screw, 31: magnetic member support, 32: screw portion, 33: compression coil spring,
Reference numeral 34: magnetic member, 35: opening, 36: magnetic member support for receiving the compression coil spring, 37: magnetic member for receiving the compression coil spring, 40: oscillation coil, 41: winding hole, 43: bobbin, 44: diaphragm Reinforcement plate, 45
... bobbin part, 46 ... diaphragm reinforcing plate having bobbin part, 47 ... diaphragm, 48 ... small protrusion, 50 ... capacitor, 51 ... output terminal, 52 ... electric insulating filler, 53
... Electrical insulating material, 54 ... Wiring material, 60 ... Metal plate, 61 ... Spacer, 65 ... Screw-shaped cylindrical magnetic member, 66 ... Bottom wall part,
67: compression coil spring (medium diameter), 69: magnetic member screw type magnetic member screw type support, 70 ... upper case, 71 ...
Compression coil spring adjusting screw, 72: housing (oscillation coil 88, capacitor 89), 73: connector housing, 74: connector terminal, 75: air hole, 76: screw, 80: lower case, 81: gas inlet , 82: pressure receiving chamber, 83: diaphragm, 84: diaphragm reinforcing plate,
85 ... magnetic member, 87 ... compression coil spring, 88 ...
Oscillation coil, 89: condenser, 90: operating rod (B), 91: operating rod A, 92: large-diameter compression coil spring, 93: metal ring, 94: sliding element

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[Procedure amendment]

[Submission date] December 11, 2000 (200.12.
11)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 8

[Correction method] Change

[Correction contents]

FIG. 8 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 19, 2000 (200.12.
19)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

In order to achieve the above object, an LC oscillation type multifunctional displacement sensor according to the present invention comprises a moving oscillator coil, a moving oscillator coil, and a moving oscillator coil.
A displacement sensor comprising: a metal and a moving ferrite core type displacement detecting section; and an LC oscillation circuit section that outputs a square wave oscillation composed of an IC including the moving oscillation coil, a capacitor and an inverter function , It has the following features.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

A second embodiment of the displacement detection unit is as follows. One configuration of the displacement detection unit is as follows. When an operating case A (lever, handle, arm) disposed on the outer periphery of the upper case is pressed, the displacement detection unit is moved from the axial direction of the oscillation coil. The oscillation coil may be moved toward and away from the oscillating coil (the rod A may be a displacement of continuous movement in an analog manner, or a displacement provided with a mechanism that makes a discontinuous movement in a digital or snap switch or reversing switch operation. The same applies to the following.) Possible metal rings (for example, iron plate, stainless plate, copper plate, aluminum plate, titanium plate, magnesium plate and / or composite heavy plate, alloy thereof), compression coil spring adjusting screws for receiving compression coil springs, The compression coil spring adjusting screw provided on the upper case can be screwed therein and can be moved in the axial direction of the oscillation coil by pressing the operating rod B (lever, handle, arm). It may be a displacement of a continuous motion in an analog manner, or a displacement provided with a mechanism that causes a discontinuous motion in a digital or snap switch or reversing switch operation. The same applies to the following.) A hollow cylindrical magnetic member (e.g., a ferrite core) supported by the magnetic member support; and a diaphragm reinforcing plate having a wound hole such that the wound hole faces an opening of the magnetic member. The supported oscillation coil, the diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, the compression coil spring adjusting screw, and the diaphragm reinforcing plate are constantly resilient. Displaced in the axial direction of the oscillating coil by the biasing compression coil spring and the gas pressure in the pressure receiving chamber, disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case. And the lower case to form a receiving chamber with the diaphragm has a circular diaphragm, a combined gas inlet fitting and the upper case is made of a. For example, as disclosed in Japanese Patent Publication No. 5-049056, the use of a magnetic material or a non-magnetic material allows the metal ring to pass a magnetic flux about 1000 times higher than air, and a capacitor for the metal ring. And oscillation coil and inverter
This makes it easy to change the oscillation frequency Fin of the LC oscillation circuit section including the IC including the function .

Claims (7)

[Claims] 1. An upper case, a bamboo column-shaped, cup-shaped or hollow column-shaped magnetic member provided on the upper case and movable in the axial direction of the oscillation oscillation coil by pressing a operating rod, and a winding hole. An oscillation coil supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and moves in the upper case in the axial direction of the oscillation coil in conjunction with the displacement of the diaphragm. A possible diaphragm reinforcing plate, a compression coil spring that constantly urges the magnetic member and the diaphragm reinforcing plate, and a displacement of the diaphragm reinforcing plate that is displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber. Displacement constituted by a circular diaphragm provided at a lower portion and sandwiched between the upper case and the lower case, and a lower case fitted with the upper case and having a gas inlet and forming a pressure receiving chamber together with the diaphragm. Detector, or An upper case, a magnetic member support provided on the upper case, which is movable in the axial direction of the oscillation coil by pressing the operating rod, and a bamboo cylinder, a cup-shaped or a cup shape supported by the magnetic member support. A hollow cylindrical magnetic member, an oscillating coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and an oscillation coil interlocked with the displacement of the diaphragm. A diaphragm reinforcing plate movable in the case in the axial direction of the oscillation coil, a compression coil spring which constantly urges the magnetic member support and the diaphragm reinforcing plate, and a gas pressure in a pressure receiving chamber. A circular diaphragm displaced in the axial direction of the oscillation coil and disposed at a lower portion of the diaphragm reinforcing plate and sandwiched between the upper case and the lower case;
A displacement detecting portion or an upper case, which includes a lower case which is fitted with the upper case and has a gas inlet and forms a pressure receiving chamber together with the diaphragm, a compression coil spring adjusting screw, and an upper portion of the upper case A magnetic member support that can be screwed with the compression coil spring adjusting screw and that can move in the axial direction of the oscillation coil by pressing the operating rod; and a hollow cylindrical magnetic member that is supported by the magnetic member support. An oscillation coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and the oscillation coil moves inside the upper case in conjunction with the displacement of the diaphragm. A diaphragm reinforcing plate movable in the axial direction, a compression coil spring that constantly urges the compression coil spring adjusting screw and the diaphragm reinforcement plate, and the oscillation generation by the gas pressure of the pressure receiving chamber. A circular diaphragm that is displaced in the axial direction of the vibration coil and is disposed below the diaphragm reinforcing plate and is sandwiched between the upper case and the lower case, and has a gas inlet fitted to the upper case and receives pressure with the diaphragm. A displacement detection unit composed of a lower case forming a chamber, or an upper case, and a magnetic member screw-type supporter provided on the upper case and movable in the axial direction of the oscillation coil by pressing a operating rod. A magnetic member of a threaded column supported by the magnetic member screw-type support, and a diaphragm reinforcing plate having a wound hole such that the wound hole faces the bottom wall of the magnetic member. An oscillation coil, a diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and a magnetic member screw-type support and the diaphragm reinforcing plate. The urging compression coil sp A ring, a circular diaphragm that is displaced in the axial direction of the oscillation coil due to gas pressure in the pressure receiving chamber, is disposed below the diaphragm reinforcing plate, and is sandwiched between the upper case and the lower case, and is fitted to the upper case. A lower case having a gas inlet and forming a pressure receiving chamber together with the diaphragm; a displacement detecting section; an LC oscillation circuit for outputting a square wave oscillation composed of the oscillation coil, a capacitor, and an IC; The LC oscillation frequency is changed by a magnetic member which is disposed on the outer peripheral portion of the washing tub and is displaced by pressing a kong rod which is engaged with a detection rod for detecting a swing collision by eccentric rotation of the washing tub. A multifunctional displacement sensor comprising: an oscillation detection function obtained; and a water level detection function capable of obtaining a change in LC oscillation frequency by an oscillation coil displaced by gas pressure in a pressure receiving chamber. 2. An upper case, a bamboo-cylinder-shaped, cup-shaped or hollow-cylindrical magnetic member provided on the upper case and movable in the axial direction of the oscillation oscillation coil by pressing a operating rod, and a winding hole. An oscillation coil supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and moves in the upper case in the axial direction of the oscillation coil in conjunction with the displacement of the diaphragm. A possible diaphragm reinforcing plate, a compression coil spring that constantly urges the magnetic member and the diaphragm reinforcing plate, and a displacement of the diaphragm reinforcing plate that is displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber. Displacement constituted by a circular diaphragm provided at a lower portion and sandwiched between the upper case and the lower case, and a lower case fitted with the upper case and having a gas inlet and forming a pressure receiving chamber together with the diaphragm. Detector, or An upper case, a magnetic member support provided on the upper case, which is movable in the axial direction of the oscillation coil by pressing the operating rod, and a bamboo cylinder, a cup-shaped or a cup shape supported by the magnetic member support. A hollow cylindrical magnetic member, an oscillating coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and an oscillation coil interlocked with the displacement of the diaphragm. A diaphragm reinforcing plate movable in the case in the axial direction of the oscillation coil, a compression coil spring which constantly urges the magnetic member support and the diaphragm reinforcing plate, and a gas pressure in a pressure receiving chamber. A circular diaphragm displaced in the axial direction of the oscillation coil and disposed at a lower portion of the diaphragm reinforcing plate and sandwiched between the upper case and the lower case;
A displacement detecting portion or an upper case, which includes a lower case which is fitted with the upper case and has a gas inlet and forms a pressure receiving chamber together with the diaphragm, a compression coil spring adjusting screw, and an upper portion of the upper case A magnetic member support that can be screwed with the compression coil spring adjusting screw and that can move in the axial direction of the oscillation coil by pressing the operating rod; and a hollow cylindrical magnetic member that is supported by the magnetic member support. An oscillation coil having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces the opening of the magnetic member, and the oscillation coil moves inside the upper case in conjunction with the displacement of the diaphragm. A diaphragm reinforcing plate movable in the axial direction, a compression coil spring that constantly urges the compression coil spring adjusting screw and the diaphragm reinforcement plate, and the oscillation generation by the gas pressure of the pressure receiving chamber. A circular diaphragm that is displaced in the axial direction of the vibration coil and is disposed below the diaphragm reinforcing plate and is sandwiched between the upper case and the lower case, and has a gas inlet fitted to the upper case and receives pressure with the diaphragm. A displacement detection unit composed of a lower case forming a chamber, or an upper case, and a magnetic member screw-type supporter provided on the upper case and movable in the axial direction of the oscillation coil by pressing a operating rod. A magnetic member of a threaded column supported by the magnetic member screw-type support, and a diaphragm reinforcing plate having a wound hole such that the wound hole faces the bottom wall of the magnetic member. An oscillation coil, a diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and a magnetic member screw-type support and the diaphragm reinforcing plate. The urging compression coil sp A ring, a circular diaphragm that is displaced in the axial direction of the oscillation coil due to gas pressure in the pressure receiving chamber, is disposed below the diaphragm reinforcing plate, and is sandwiched between the upper case and the lower case, and is fitted to the upper case. A lower case having a gas inlet and forming a pressure receiving chamber together with the diaphragm; a displacement detecting section; an LC oscillation circuit for outputting a square wave oscillation composed of the oscillation coil, a capacitor, and an IC; A door opening / closing detection function that obtains a change in the LC oscillation frequency by a magnetic member that is displaced by pressing the operating rod that is engaged with the door of the electric device, and an oscillation coil that is displaced by the gas pressure of the pressure receiving chamber. A multi-function displacement sensor, comprising: a water level detection function capable of obtaining a change in oscillation frequency. 3. The LC oscillation frequency Fin, which is changed by a magnetic member displaced by pressing the operating rod or an oscillating coil displaced by gas pressure in the pressure receiving chamber, is compared with a plurality of predetermined judgment frequencies Fde. 3. The multifunctional displacement sensor according to claim 1, wherein the displacement is calculated. 4. An upper case, a metal ring disposed on an outer peripheral portion of the upper case and capable of moving toward and away from the oscillation coil from the axial direction of the oscillation coil by pressing the operating rod A, provided on an upper portion of the upper case. A bamboo rod cylindrical, cup-shaped or hollow cylindrical magnetic member movable in the axial direction of the oscillating coil by pressing the operating rod B, and a winding hole having a winding hole facing the opening of the magnetic member; An oscillating coil supported by the diaphragm reinforcing plate, a diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillating coil in conjunction with the displacement of the diaphragm, the magnetic member and the diaphragm reinforcing plate. And a compression coil spring that constantly urges the spring, and is displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber, and is disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case. A circular diaphragm and the upper case A lower case that is fitted and has a gas inlet and forms a pressure receiving chamber together with the diaphragm, or an upper case, and pressing of the operating rod A disposed on the outer periphery of the upper case. A metal ring which can be moved toward and away from the oscillation coil in the axial direction of the oscillation coil, a magnetic member support provided on the upper case and movable in the axis direction of the oscillation coil by pressing the operating rod B, and the magnetic member A bamboo column-shaped, cup-shaped or hollow-column-shaped magnetic member supported by the support, and a wound hole, which is supported by the diaphragm reinforcing plate so that the wound hole faces the opening of the magnetic member. An oscillation coil, a diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillation coil in conjunction with the displacement of the diaphragm, and a magnetic member supporting member and the diaphragm reinforcing plate which are constantly resiliently biased. Compression coil spring and receiving pressure A circular diaphragm which is displaced in the axial direction of the oscillation coil by the gas pressure of the chamber, is disposed below the diaphragm reinforcing plate, and is sandwiched between the upper case and the lower case, and is fitted with the upper case to form a gas inlet. A lower case that forms a pressure receiving chamber together with the diaphragm, or an upper case, and a pressing member A disposed on the outer periphery of the upper case. A metal ring that can be moved toward and away from the oscillation coil, a compression coil spring adjustment screw, and the compression coil spring adjustment screw provided on the upper case can be screwed and can be moved in the axial direction of the oscillation coil by pressing the operating rod B. A magnetic member support, a hollow cylindrical magnetic member supported by the magnetic member support, and a diaphragm reinforcing plate having a winding hole such that the winding hole faces the opening of the magnetic member. Oscillation supported The coil, the diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and the compression coil spring adjusting screw and the diaphragm reinforcing plate are constantly resiliently urged. A compression coil spring, a circular diaphragm displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber, disposed below the diaphragm reinforcing plate, and sandwiched between the upper case and the lower case, and the upper case; A lower case that is fitted and has a gas inlet and forms a pressure receiving chamber together with the diaphragm, or an upper case, and pressing of the operating rod A disposed on the outer periphery of the upper case. A metal ring that can be moved toward and away from the oscillation coil from the axial direction of the oscillation coil, and a magnetic member screw-type support that is provided on the upper case and that can move in the axial direction of the oscillation coil by pressing the operating rod B; The A magnetic member of a threaded column supported by a magnetic member screw-type support; and an oscillation having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces a bottom wall of the magnetic member. A coil, a diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillation coil in conjunction with the displacement of the diaphragm, and a magnetic member screw-type support and the diaphragm reinforcing plate which are constantly resiliently biased. A compression coil spring, a circular diaphragm displaced in the axial direction of the oscillation coil due to gas pressure in the pressure receiving chamber, disposed at a lower portion of the diaphragm reinforcing plate and sandwiched between the upper case and the lower case, A lower case which is fitted to the case, has a gas inlet, and forms a pressure receiving chamber together with the diaphragm; and a square wave oscillator comprising the oscillation coil, a capacitor, and an IC. LC output And a metal ring which is disposed on the outer periphery of the washing tub and which is displaced by pressing a kong rod A which is engaged with a detection rod for detecting a swing collision by eccentric rotation of the washing tub. Swing detection function to obtain the change of
A door opening / closing detection function in which a change in the LC oscillation frequency is obtained by a magnetic member displaced by pressing, and a water level detection function in which a change in the LC oscillation frequency is obtained by an oscillation coil displaced by the gas pressure in the pressure receiving chamber. Characteristic multifunctional displacement sensor. 5. An upper case, a metal ring disposed on an outer peripheral portion of the upper case and capable of moving toward and away from the oscillation coil from the axial direction of the oscillation coil by pressing the operating rod A, provided on an upper portion of the upper case. A bamboo rod cylindrical, cup-shaped or hollow cylindrical magnetic member movable in the axial direction of the oscillating coil by pressing the operating rod B, and a winding hole having a winding hole facing the opening of the magnetic member; An oscillating coil supported by the diaphragm reinforcing plate, a diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillating coil in conjunction with the displacement of the diaphragm, the magnetic member and the diaphragm reinforcing plate. And a compression coil spring that constantly urges the spring, and is displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber, and is disposed below the diaphragm reinforcing plate and sandwiched between the upper case and the lower case. A circular diaphragm and the upper case A lower case that is fitted and has a gas inlet and forms a pressure receiving chamber together with the diaphragm, or an upper case, and pressing of the operating rod A disposed on the outer periphery of the upper case. A metal ring which can be moved toward and away from the oscillation coil in the axial direction of the oscillation coil, a magnetic member support provided on the upper case and movable in the axis direction of the oscillation coil by pressing the operating rod B, and the magnetic member A bamboo column-shaped, cup-shaped or hollow-column-shaped magnetic member supported by the support, and a wound hole, which is supported by the diaphragm reinforcing plate so that the wound hole faces the opening of the magnetic member. An oscillation coil, a diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillation coil in conjunction with the displacement of the diaphragm, and a magnetic member supporting member and the diaphragm reinforcing plate which are constantly resiliently biased. Compression coil spring and receiving pressure A circular diaphragm which is displaced in the axial direction of the oscillation coil by the gas pressure of the chamber, is disposed below the diaphragm reinforcing plate, and is sandwiched between the upper case and the lower case, and is fitted with the upper case to form a gas inlet. A lower case that forms a pressure receiving chamber together with the diaphragm, or an upper case, and a pressing member A disposed on the outer periphery of the upper case. A metal ring that can be moved toward and away from the oscillation coil, a compression coil spring adjustment screw, and the compression coil spring adjustment screw provided on the upper case can be screwed and can be moved in the axial direction of the oscillation coil by pressing the operating rod B. A magnetic member support, a hollow cylindrical magnetic member supported by the magnetic member support, and a diaphragm reinforcing plate having a winding hole such that the winding hole faces the opening of the magnetic member. Oscillation supported The coil, the diaphragm reinforcing plate movable in the axial direction of the oscillation coil in the upper case in conjunction with the displacement of the diaphragm, and the compression coil spring adjusting screw and the diaphragm reinforcing plate are constantly resiliently urged. A compression coil spring, a circular diaphragm displaced in the axial direction of the oscillation coil by the gas pressure of the pressure receiving chamber, disposed below the diaphragm reinforcing plate, and sandwiched between the upper case and the lower case, and the upper case; A lower case that is fitted and has a gas inlet and forms a pressure receiving chamber together with the diaphragm, or an upper case, and pressing of the operating rod A disposed on the outer periphery of the upper case. A metal ring that can be moved toward and away from the oscillation coil from the axial direction of the oscillation coil, and a magnetic member screw-type support that is provided on the upper case and that can move in the axial direction of the oscillation coil by pressing the operating rod B; The A magnetic member of a threaded column supported by a magnetic member screw-type support; and an oscillation having a winding hole and supported by a diaphragm reinforcing plate such that the winding hole faces a bottom wall of the magnetic member. A coil, a diaphragm reinforcing plate movable in the upper case in the axial direction of the oscillation coil in conjunction with the displacement of the diaphragm, and a magnetic member screw-type support and the diaphragm reinforcing plate which are constantly resiliently biased. A compression coil spring, a circular diaphragm displaced in the axial direction of the oscillation coil due to gas pressure in the pressure receiving chamber, disposed at a lower portion of the diaphragm reinforcing plate and sandwiched between the upper case and the lower case, A lower case which is fitted to the case, has a gas inlet, and forms a pressure receiving chamber together with the diaphragm; and a square wave oscillator comprising the oscillation coil, a capacitor, and an IC. LC output The LC oscillation frequency is generated by a magnetic member which is disposed on the outer periphery of the washing tub and which is displaced by pressing the operating rod B which engages with a detection rod for detecting a swing collision by eccentric rotation of the washing tub. And a door opening / closing detection function in which a change in LC oscillation frequency is obtained by a metal ring displaced by pressing the operating rod A engaged with the door of the washing machine, and a gas pressure in the pressure receiving chamber. A water level detection function for obtaining a change in the LC oscillation frequency by means of a displaced oscillation coil. 6. An LC oscillation frequency F which is changed by a metal ring and / or a magnetic member which is displaced by pressing the operating members A and / or B, or an oscillation coil which is displaced by the gas pressure of the pressure receiving chamber.
6. The multi-function displacement sensor according to claim 4, wherein in calculates the displacement amount by comparing the height with a plurality of predetermined determination frequencies Fde. 7. The oscillation frequency band Fin0 obtained by detecting the opening and closing of the door, the oscillation frequency band Fin1 obtained by detecting the swing of the washing tub, and the oscillation frequency band Fin2 obtained by detecting the water level of the washing tub do not overlap. 7. The multifunctional displacement sensor according to claim 3, wherein the output is performed as follows.