JP2002292188A - Lid lock of washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lid lock of a washing machine that locks and releases a lid by moving a locking pin between an engagement position and a release position by energizing separately two electromagnetic coils arranged in parallel, that does not necessitate provision of tight closure, can be arranged even in a small space below a top cover, and helps easily, inexpensively and reliably detect the movement of a plunger to the engagement position or the release position. SOLUTION: The lid lock of a washing machine is comprised of first and second electromagnetic coils 9 and 10 moving a plunger 17 provided with a locking pin 18 at the tip, to an engagement position and a release position, first and second permanent magnets 14 and 15 holding in the engagement position and the release position, and a spring 26 as an energized member energized by the contact of the plunger 17 when the plunger 17 moves to the engagement position or the release position is fitted, and lid locking is detected from a change in output voltage due to energization and deenergization.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid lock device for a washing machine.

[0002]

2. Description of the Related Art A fully automatic one-tank type washing machine is, for example, shown in FIG.
As shown in FIG. 1, an outer tub is swingably suspended in an outer case 1, and a washing and dewatering tub 3 having a rotating blade 2 at the bottom is rotatably disposed in the outer tub. Is covered with a top cover 4, and the upper opening of the washing and dewatering tub 3 is closed by a lid 5 so as to be openable and closable. In the figure, reference numeral 6 denotes a water supply valve, and 7 denotes an operation panel disposed at the front of the top cover 4 and provided with setting buttons for setting operation contents and the like.

The lid 5 has a reduced height because a washing machine and a clothes dryer are integrally used, and a clothes dryer is often installed above the washing machine. Is required to be divided into two parts, a front part 5a and a front part 5b, and the center part is bent by a hinge part. A handle 25 for opening and closing is attached to the front part 5b. is there.

In a washing machine having such a structure, the entire steps of water supply, washing, rinsing, and dehydration automatically proceed. However, in the dehydration step, the washing and dewatering tub 3 is provided in order to blow off the moisture of the laundry by centrifugal force. Rotate at high speed. For this reason, during the dehydration operation,
It is necessary to close the lid 5 and prevent the lid 5 from being easily opened.

As a structure for this purpose, as shown in FIG. 8, a lid switch 21 for detecting the opening and closing of the lid 5 is provided on the side in contact with the operation panel 7 at the front position of the lid front 5b. As shown in the vertical front view of FIG. 9, the lid lock device 8 was fixed to the lower surface of the top cover 4 at the side rear position of the lid front 5b with mounting screws.

[0006] Then, a lid closing signal from the lid switch 21 is output to an operation control unit of a well-known microcomputer to confirm that the lid 5 is closed, and then the dehydration operation is started. The lock device 8 prevents the lid 5 from opening.

The lid lock device 8 is, for example, shown in FIGS.
2. As shown in FIG. 13, the basic structure is composed of a combination of an electromagnetic coil, a permanent magnet and a plunger,
The first electromagnetic coil 9 and the second electromagnetic coil 10 are arranged side by side on a third yoke 13 having a flat plate shape.
The second electromagnetic coil 10 is positioned laterally between
The second yoke 12 is fixed to the third yoke 13 so as to be erected, and covers the upper side and the other side of the first electromagnetic coil 9 and the upper side and the other side of the second electromagnetic coil 10. The first yoke 11 is fixed to the third yoke 13 to stand upright. In this case, the first electromagnetic coil 9 is arranged on the side of the lid 5, and the second electromagnetic coil 10 is arranged on the opposite side.

As a result, a magnetic circuit is formed at the first electromagnetic coil 9 and the second electromagnetic coil 10 surrounded by the first yoke 11, the second yoke 12, and the third yoke 13, respectively. .

Then, the plunger 17 made of a magnetic material is
And the second electromagnetic coil 10 are penetrated and disposed. In the figure, reference numerals 11a and 11b denote holes formed in the first yoke 11 and through which the plunger 17 passes.

At the tip of the plunger 17 on the lid 5 side, a lock pin 18 made of a non-magnetic material is attached on the coaxial line, and at the other end of the coaxial line, means for detecting the position of the plunger 17, ie, the lock pin 18 is provided. A light-shielding rod 19 made of a non-magnetic material, which constitutes a part of the above, is attached. In addition, the lock pin 18 and the light-shielding bar 19
It may be a non-magnetic stick of a book.

The first permanent magnet 14 is arranged on the coaxial line of the plunger 17, that is, the lock pin 18, further positioned on the side of the lid 5 of the first electromagnetic coil 9. The first permanent magnet 14 was fixed to the third yoke 13 with screws and fixed to a mounting base 16 formed of resin and bonded to form a through hole 14a through which the lock pin 18 penetrated.

On the side of the second electromagnetic coil 10 opposite to the lid 5, a second permanent magnet 15 is arranged on the plunger 17, that is, on the coaxial line of the light-shielding bar 19. The second permanent magnet 15
The light-shielding rod 19 is also fixed to the third yoke 13 with screws and fixed to a resin-molded mounting base 16 by adhesion.
Formed through holes 15a.

The second permanent magnet 15 is located on the side opposite to the lid 5, and a plunger 17 is provided outside the mount 16.
That is, for detecting the movement operation of the lock pin 18,
Light-emitting element (LED) and light-receiving element (phototransistor)
Is provided. In this case, the light-shielding bar 19 movably penetrates between the light-emitting element (LED) and the light-receiving element (phototransistor).

On the other hand, a through hole 1 through which a lock pin 18 penetrates is formed in a side portion of a front portion 5b of the lid 5 and a side portion of the top cover 4.
Through holes 22 and 23 are provided at positions corresponding to 4a.

Next, the operation of the lid lock device of the present invention for the dehydration operation will be described. When the lid 5 is not closed in a process other than the dehydration process, the first and second electromagnetic coils 9 and 10 are not energized, and the plunger 17 is attracted to the second permanent magnet 15 and is turned off as shown in FIG. The lock pin 18 at the tip is not inserted in the through hole 23 formed in the top cover 4 and the through hole 22 formed in the front 5b of the lid, and the lid 5 is not in the locked state.

The light-shielding bar 19 is located between the light-emitting element (LED) and the light-receiving element (phototransistor), and the photointerrupter 20 is not operating.

When the washing process proceeds and the process shifts to the dehydration process, the cover 5 is closed and the output from the cover switch 21 is input to the operation control unit. Are energized, and the first, second,
The plunger 17 attracted to the second permanent magnet 15 by the magnetic circuit on the side of the electromagnetic coil 9 constituted by the third yokes 11, 12, 13 receives an attraction force larger than the attraction force. , Away from the second permanent magnet 15, FIG.
1. The yoke 11 in the direction of the arrow in FIG.
Move to the left edge of.

In this state, even if the power supply to the first electromagnetic coil 9 is cut off and the attraction force of the magnetic circuit is lost, the plunger 1
7 has reached the left end of the first yoke 11, and receives the action of the attractive force of the first permanent magnet 14 to
As shown in (1), it further moves to the locking position in the direction of the lid 5, and is brought into a state of being attracted to the first permanent magnet 14.

The lock pin 18 at the tip of the plunger 17 penetrates through the through hole 14a of the first permanent magnet 14, and is further formed in the through hole 23 formed in the top cover 4 and on the side of the front 5b of the lid. The cover 5 is inserted into the through hole 22 and the lid 5 is locked by the lock pin 18 in this state.

When the plunger 17 moves in the direction of the lid 5, the light-shielding rod 19 integrated with the plunger 17 also moves in the direction of the lid 5, and as a result, the light-shielding rod 19 is moved to the light emitting element (LED) and the light receiving element (photograph). Transistor), and the photo interrupter 20 operates.

The operation control unit determines that the plunger 17 has moved and the lid 5 has been locked by receiving the output from the photo interrupter 20 as described above, Output to start the dehydration operation. Thus, the lid 5 is completely locked, and after this is confirmed, the dehydration operation starts.

During the dehydration operation, even if the outlet of the washing machine is disconnected or a power failure occurs, the power supply to the washing machine is interrupted, and the control function of the operation control unit is disturbed. Since the attracted state of the first permanent magnet 14 holds the attracted state and is held at the locking position, the lid 5 is prevented from being opened and closed, and safety during the dehydration operation can be ensured.

When the dehydration process progresses and reaches a predetermined time,
Although the power to the dehydrating mechanism is cut off by the output from the operation control unit and the operation of the dehydrating mechanism is stopped, the washing and dewatering tub 3 into which the laundry is put continues rotating by inertia.

When the operation control unit detects that the rotation due to inertia is stopped, the lid lock device 8 in the state shown in FIG. 12 energizes the second electromagnetic coil 10 based on the output from the operation control unit. And the first, second and third yokes 1
The plunger 17 is moved to the release position on the right side in FIG. 7 opposite to the case where the lid is locked by the magnetic circuit on the side of the electromagnetic coil 10 composed of 1, 12, 13 and the second permanent magnet 15 Adsorbed.

In this state, the lock pin 18 is
Since the cover 5 comes out of the cover 2 and 23, the locking of the cover 5 is released, and the cover 5 can be opened and closed. Therefore, the laundry in the washing / dewatering tub 3 can be taken out by opening the lid 5.

[0026]

Since the photo interrupter 20 and the light shielding bar 19 are used as means for detecting the locked position and the released position of the lock pin 18, the photo interrupter 20 is attached to the lid lock device 8. A space for additional attachment is required, and a device is required to dispose it in a limited space below the top cover 4.

Further, the space below the top cover 4 has a lot of moisture and the like, the use environment is not good, and it is necessary to shut off the moisture by sealing or the like in order for the photointerrupter 20 to function normally. And the reliability becomes problematic, and the cost becomes high.

An object of the present invention is to eliminate the disadvantages of the prior art and to move the lock pin between the locked position and the released position by separately energizing two electromagnetic coils arranged side by side. In the lid lock device that locks and releases the lid, there is no need to provide sealing, etc., it is easy to arrange even in a narrow space below the top cover, and the plunger is located in either the locked position or the released position. An object of the present invention is to provide a lid lock device of a washing machine that can easily, inexpensively, and reliably detect whether the lid has moved.

[0029]

In order to achieve the above object, the present invention firstly hangs an outer tank in an outer box in a swingable manner.
In the outer tub, a washing and dewatering tub having a rotating wing at the bottom is rotatably disposed, and the upper portion of the outer box is covered with a top cover having a clothes input to the washing and dewatering tub, and the clothes input port is provided. In a washing machine provided with a lid that opens and closes and a lid lock device that locks the lid so that the lid cannot be opened during the spin-drying operation, the lid lock device locks a plunger with a lock pin at the tip at a locking position and a releasing position. And an electromagnetic coil to be moved respectively to
An energized member that is constituted by a holding mechanism that holds the lock position and the release position respectively, and that is energized by the plunger contacting when the plunger moves to any of the lock position and the release position. The presence / absence of a lid lock is detected from a change in output voltage due to turning on / off of energization.

Thus, it is not necessary to dispose an expensive photo-interrupter as in the prior art, and it is only necessary to dispose the energized member so as to be able to contact the plunger. Whether the plunger is located in the locking position or the releasing position is determined based on the presence or absence of contact of the jar with the spring.

Second, the energized members are disposed on both sides of the plunger, and are formed by springs biased in the direction of the plunger. The structure of the plunger can be detected with a simple structure.

Third, the output voltage when the plunger comes into contact with the spring is detected by detecting the output voltage after a certain period of time after the contact, thereby cutting off an unstable output called chattering at the initial stage of the contact. Because it is possible, accuracy can be expected and reliability is improved.

Fourth, by disposing the spring at the release position side of the holding mechanism with respect to the movement direction of the plunger, the spring is energized at the release position. Therefore, the possibility of opening the lid can be reliably detected.

Fifth, by forming a contact projection with the spring at the end of the plunger, the contact projection contacts the spring at the locking position. Therefore, not only the contact with the spring is further ensured, but also the power is supplied at the locking position. If the lead wire is disconnected during the dehydration operation in the locked state, the power supply is cut off and it is determined that the lock is released. Then, the dehydration operation is stopped, and the safety is improved.

If the lead wire is broken before the start of operation, the spring is not energized, so it is determined that the lock is not applied, and the safety is improved.

Further, although electricity is supplied at the locking position,
If the output voltage becomes unstable in this state, the plunger sandwiched between the springs vibrates to determine that the contact state is not stable, and the imbalance during the dehydration operation can be detected.

[0037]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional front view of a lid lock device for a washing machine according to the present invention. The basic configuration is the same as that of the conventional example shown in FIGS. 11 to 13, and the same components are denoted by the same reference numerals. is there. The lid lock device 8 of the present invention is also composed of a combination of an electromagnetic coil, a permanent magnet, and a plunger. The first electromagnetic coil 9 and the second electromagnetic coil 10 are separated from each other and are arranged side by side on the yoke 24. Is disposed on the side of the lid 5, and the second electromagnetic coil 10 is disposed on the opposite side.

Thus, a magnetic circuit is formed at the first electromagnetic coil 9 and the second electromagnetic coil 10 surrounded by the yoke 24, respectively.

Then, the plunger 17 is disposed so as to penetrate the first electromagnetic coil 9 and the second electromagnetic coil 10. At the tip of the plunger 17 on the lid 5 side, a lock pin 18 made of a non-magnetic material is attached on the coaxial line, and is positioned further on the lid 5 side of the first electromagnetic coil 9, and the plunger 1
7, that is, the first permanent magnet 14 as a holding mechanism is arranged on the coaxial line of the lock pin 18. Second electromagnetic coil 1
A second permanent magnet 15 as a holding mechanism is arranged on the coaxial line of the plunger 17 on the side opposite to the lid 5 of the “0”.

In the first embodiment, as means for detecting the position of the plunger 17, ie, the lock pin 18, by positioning the plunger 17 outside the yoke 24 in the moving direction of the plunger 17, FIG. As shown in FIG. 2, a member to be energized is provided at a position where it comes into contact when the plunger 17 moves to the release position and separates when the plunger 17 moves to the locking position as shown in FIG.

The member to be energized comprises a pair of springs 26 arranged in a direction orthogonal to the axial direction of the plunger 17 and sandwiching the plunger 17 from both sides. It is urged in the direction of 17.

Then, as shown in the circuit diagram of FIG. 4, when the plunger 17 comes into contact with the pair of springs 26 at the release position, the spring 26 is energized to close the normally open contact 26a. The output voltage was input to a controller using a microcomputer for controlling the washing.

Next, a method for detecting the lock of the lid 5 will be described. The operation of locking and releasing the lid is the same as in the prior art, and includes the plunger 17 and the lock pin 1 integrated therewith.
8 is moved to a locking position and a releasing position by a magnetic circuit formed by the first and second electromagnetic coils 9 and 10, and after moving to the locking position and the releasing position, the first and second permanent magnets are moved. It is held in that position by the attractive force of the magnets 14 and 15

That is, when the lid 5 is not closed during a process other than the dewatering process, the first and second electromagnetic coils 9 and 10 are not energized, and the plunger 17 is connected to the second permanent magnet 15. After being sucked, it is in the position shown in FIG.
3. The lid 5 is not inserted into the through hole 22 formed in the front 5b of the lid, and the lid 5 is not in a locked state.

In this state, the end of the plunger 17 on the opposite side of the lock pin 18 is sandwiched between a pair of springs 26 as shown in FIGS. As a result, the spring 26 is energized, the contact 26a is closed, and the output voltage is output to the control device. Therefore, the control device determines that the lock pin 18 is not protruding and the lid 5 is in the unlocked unlocked state based on the output of this voltage.

When the washing process proceeds and the process shifts to the dewatering process, the lid 5 is closed and the output from the lid switch 21 is input to the control device. The plunger 17, which is energized by the coil 9 and is attracted to the second permanent magnet 15 by the magnetic circuit on the side of the first electromagnetic coil 9, receives an attraction force larger than the attraction force, and receives a second permanent magnet. It moves away from the magnet 15 to the left end of the yoke 24 in FIG.

As a result, the lock pin 18 at the tip is inserted into the through-hole 23 formed in the top cover 4, protrudes from the through-hole 22 formed in the front 5 b of the lid, and is locked.
Is locked. In this locked state, the end of the plunger 17 opposite to the lock pin 18 comes out from between the pair of springs 26 by the movement of the plunger 17 as shown in FIG.

As a result, the power supply to the spring 26 is cut off,
Since the output voltage becomes 0, the control device determines that the lid 5 is locked by this output voltage, and outputs it to the dehydration mechanism to start the dehydration operation.

In order to release the lid lock from the locked state where the output voltage is 0, the plunger 17 moves from the locked position to the released position. By contacting and being energized,
This is performed by detecting this voltage change. In this case, the output voltage generated by the contact between the plunger 17 and the spring 26 becomes unstable called chatter at the initial stage as shown in FIG. Therefore, in the present invention, after starting the output, several milliseconds
The output voltage after the output becomes stable after c is detected, and the lid lock release is determined based on the output voltage.

FIGS. 6 and 7 show a second embodiment. As means for detecting the position of the plunger 17, ie, the lock pin 18, the plunger 17 is separated when it is moved to the release position and is moved to the locked position. The spring 26 is disposed at a position where the spring 26 contacts the spring 26b, and the projections 2 contacting the springs 26b and 26c on the peripheral surface of the plunger 17.
7 was formed.

That is, the distance between the pair of springs 26b and 26c is formed to be slightly larger than the diameter of the plunger 17, and the diameter of the projection 27 is formed to be slightly larger than the distance between the springs 26b and 26c.

Thus, in the locked position, the plunger 1
As shown in FIG. 6, the projection 2 moves to the locking position.
7 comes into contact with the springs 26b and 26c,
26c is energized, and the output voltage determines that the lid is locked. In the release position, the plunger 17 moves to the release position as shown in FIG.
Is located between the springs 26b and 26c, the plunger 17 does not contact the springs 26b and 26c, and the output voltage becomes zero.
And it is determined that the lock is released.

In the second embodiment, since the power is supplied at the locking position, if the lead wire is disconnected during the dehydrating operation in the locked state, the power supply is cut off, the lock is determined to be released, and the dehydrating operation is stopped. And safety is improved. If the lead wire is broken before the start of the operation, it is determined that the lock is not applied because the springs 26b and 26c are not energized, and the safety is improved.

Further, although electricity is supplied at the locking position,
If the output voltage becomes unstable in this state, the spring 26
By judging that the plunger 17 sandwiched between b and 26c vibrates and the contact state is not stable, the imbalance during the spin-drying operation can be detected.

[0055]

As described above, the lid locking device for a washing machine according to the present invention firstly hangs an outer tub in an outer box so as to swing freely, and has a rotating blade at the bottom in the outer tub. The washing and dewatering tub provided is rotatably arranged, covered with a top cover that has a clothes input port to the washing and dewatering tub at the top of the outer box, and a lid is provided to open and close the clothes input port, during dehydration operation In a washing machine provided with a lid lock device for locking the lid so that the lid cannot be opened, the lid lock device includes an electromagnetic coil for moving a plunger having a lock pin attached to a tip thereof to a lock position and a release position, respectively, and a lock. A holding mechanism configured to hold the position and the release position respectively, and provided with an energized member that is energized by the plunger contacting when the plunger moves to any one of the locking position and the release position, Change in output voltage due to energization on / off To detect the presence or absence of the lid lock.

As a result, it is not necessary to dispose an expensive photointerrupter as in the prior art, and it is only necessary to dispose the energized member so as to be able to contact the plunger. Whether the plunger is located in the locking position or the releasing position is determined based on the presence or absence of contact of the jar with the spring.

Second, the energized members are disposed on both sides of the plunger, and are formed by springs biased in the direction of the plunger. The position of the jar can be detected.

Third, the output voltage when the plunger comes into contact with the spring is detected by detecting the output voltage after a certain period of time after the contact, thereby cutting off an unstable output called chattering at the initial stage of the contact. Because it is possible, accuracy can be expected and reliability is improved.

Fourth, the spring is energized at the release position by disposing the spring at the release side position of the holding mechanism with respect to the moving direction of the plunger. Therefore, the possibility of opening the lid can be reliably detected.

Fifth, by forming a contact projection with the spring at the end of the plunger, the contact projection contacts the spring at the locking position. Therefore, not only the contact with the spring is further ensured, but also the power is supplied at the locking position. If the lead wire is disconnected during the dehydration operation in the locked state, the power supply is cut off and it is determined that the lock is released. Then, the dehydration operation is stopped, and the safety is improved.

If the lead wire is broken before the start of operation, the spring is not energized, so it is determined that the spring is not locked, and the safety is improved.

Further, although electricity is supplied at the locking position,
If the output voltage becomes unstable in this state, the plunger sandwiched between the springs vibrates to determine that the contact state is not stable, and the imbalance during the dehydration operation can be detected.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing a first embodiment of a lid lock device for a washing machine of the present invention.

FIG. 2 is a front view showing a relationship between a plunger and a spring in a lid locked state, showing the first embodiment of the lid locking device for a washing machine of the present invention.

FIG. 3 is a front view showing a relationship between a plunger and a spring in a lid unlocked state showing the first embodiment of the lid locking device for a washing machine of the present invention.

FIG. 4 is a spring energizing circuit diagram showing the first embodiment of the lid lock device of the washing machine of the present invention.

FIG. 5 is a curve diagram showing a change in output voltage according to the first embodiment of the lid lock device for a washing machine of the present invention.

FIG. 6 is a front view showing a relationship between a plunger and a spring in a lid locked state according to a second embodiment of the lid locking device for a washing machine of the present invention.

FIG. 7 is a front view showing a relationship between a plunger and a spring in a lid unlocked state according to a second embodiment of the lid locking device for a washing machine of the present invention.

FIG. 8 is a plan view of the washing machine provided with the lid lock device.

FIG. 9 is a partially cutaway front view of the washing machine provided with the lid lock device.

FIG. 10 is a perspective view of a washing machine.

FIG. 11 is a vertical sectional front view of a conventional lid lock device of a washing machine.

FIG. 12 is a longitudinal sectional front view of a conventional lid lock device of a washing machine in a lid locked state.

FIG. 13 is a bottom view of a conventional lid lock device of a washing machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer box 2 ... Rotor blade 3 ... Washing and dewatering tank 4 ... Top cover 5 ... Lid 5a ...
After lid 5b ... In front of lid 6 ... Water supply valve 7 ... Operation panel 8 ... Lid locking device 9 ... First electromagnetic coil 10 ...
Second electromagnetic coil 11 First yoke 11a, 11b Hole 12
Second yoke 13: Third yoke 14: Second permanent magnet 14a
... through-hole 15 ... second permanent magnet 15a ... through-hole 16 ...
Mounting stand 17 ... Plunger 18 ... Lock pin 19 ...
Shading stick 20 ... Photo interrupter 21 ...
Lid switch 22 ... Through hole 23 ... Through hole 24 ...
Yoke 25: Handle 26, 26b, 26c: Spring 26a: Contact point 27: Projection

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Saito 1-1-1, Yamate, Funabashi-shi, Chiba Japan Nippon Steel Corporation (72) Inventor Katsunori Ishii 1-1-1, Yamate, Funabashi-shi, Chiba Japan (72) Inventor Yasuo Ikeda 1-1-1 Yamate, Funabashi-shi, Chiba F-term (reference) 3B155 AA06 BA01 BB05 BB19 CA16 CB06 DA07 DA09 LC28 MA01 MA02 MA05 MA09

Claims (5)

[Claims] 1. An outer tub is swingably suspended in an outer case, and a washing and dewatering tub having rotating blades at a bottom portion is rotatably disposed in the outer tub, and a washing and dewatering tub is provided on an upper portion of the outer case. In a washing machine equipped with a top cover having a clothes input port to the dehydration tub, a lid provided to open and close the clothes input port, and a lid lock device for locking the lid so that it cannot be opened during the dehydrating operation, The apparatus includes an electromagnetic coil for moving a plunger having a lock pin attached to a tip thereof to a locking position and a releasing position, respectively, and a holding mechanism for holding the plunger at the locking position and the releasing position, respectively.
Provide an energized member that is energized by the plunger contacting when the plunger moves to either the locked position or the released position, and detects the presence or absence of the lid lock from the change in output voltage due to energization on / off A lid lock device for a washing machine. 2. The lid lock device for a washing machine according to claim 1, wherein the energized members are disposed on both sides of the plunger, and are constituted by springs biased in the direction of the plunger. . 3. The washing machine according to claim 1, wherein the output voltage when the plunger comes into contact with the spring detects an output voltage after a predetermined time has passed after the contact. Lid lock device. 4. The lid lock for a washing machine according to claim 1, wherein the spring is disposed on a release position side of the holding mechanism with respect to a moving direction of the plunger. apparatus. 5. The lid locking device for a washing machine according to claim 1, wherein a contact projection with a spring is formed at an end of the plunger.