JP2008194226A - Sleep inducing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a head and neck part stimulation unit for stimulating the head and neck part of a human body by the vibrations of a vibrating body while suppressing the vibration sound of the vibrating body. <P>SOLUTION: The head and neck part stimulation unit has: a casing (1); elastic and magnetic vibrating bodies (3, 4) whose both ends are clamped by the casing; and a bobbin (5) arranged side by side in the clamping direction to the vibrating bodies, around which a coil (5b) is wound. The vibrating body is sucked by the bobbin and elastically deformed in one of the clamping directions when the coil is energized, and is elastically deformed in the other direction opposite to the one direction by elastic force when energizing to the coil is stopped in the state of being elastically deformed in the one direction. For the vibrating body, suction to the bobbin is blocked by the elastic force of the vibrating body elastically deformed in the one direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sleep induction device that guides a user to sleep by vibrating a vibrating body provided in a bedding.

  In recent years, various proposals have been made in order to eliminate insomnia, for example, a sleep inducing device in which a vibrating body that vibrates in any one of a stress pattern, a fatigue pattern, and a health pattern is built in a mattress. (See Patent Document 1). According to this sleep guidance device, any one of the stress pattern, the fatigue pattern, and the health pattern can be selected according to the state of each individual's living body.

Further, as another sleep inducing device, there is a sleep device including a white noise circuit, a sound filter having a power spectrum having a 1 / f characteristic with the white noise as an input, and a control circuit that changes sound output over time. An incorporated pillow has been proposed (see Patent Document 3).
Japanese Patent No. 2542334 JP-A-62-266076 JP 2000-106998 A

  When a vibrating body as a sleep induction device is incorporated in the bedding, the vibration sound of the vibrating body becomes an abnormal sound and is directly transmitted to the hearing. Therefore, to obtain a high sleep effect, the vibration sound of the vibrating body is suppressed. There is a need to. However, the sleep apparatus described in Patent Document 1 does not consider any method for suppressing the vibration sound of the vibrating body.

  Furthermore, Patent Document 3 discloses a sleep pillow in which a mechanical vibrator that vibrates with a period of 20 Hz or less is disposed at a position corresponding to the back of the head between both ears. There is no disclosure about the mechanical configuration to be suppressed.

  In order to solve the above-described problems, a sleep induction device according to the present invention is a sleep induction device that guides a user to sleep by vibrating a vibrating body provided in a bedding, and includes a first iron plate and a cylindrical shape. The vibrating body formed by arranging a coil member around which a coil is wound, a second iron plate, a nonmagnetic member, and a permanent magnet, and one end side to the other end side in the juxtaposing direction of the vibrating body A movable iron core that can move in a through-passage that extends to the coil, and an energization control circuit that controls energization of the coil, and the movable iron core prohibits energization of the coil by the energization control circuit When the permanent magnet is attracted by the permanent magnet, the permanent magnet moves relative to the vibrating body toward the first position in the through passage formed in the permanent magnet, and is moved to the coil by the energization control circuit. When energization of the permanent magnet is permitted, the permanent magnet Rebound to, characterized in that it moves relative to the vibrating body toward the second position of said formed first iron plate said through passage.

  Here, the movable iron core is formed in a large diameter portion, a first small diameter portion having a diameter smaller than the large diameter portion, and a region closer to the second iron plate than the first small diameter portion, A second small-diameter portion having a diameter smaller than that of the large-diameter portion, and in a state where the movable iron core is located at the first position, the second small-diameter portion is more than the second iron plate. In a state where the movable iron core is located at the second position, the first small diameter portion is located on the second iron plate rather than the first iron plate. Located in a close area.

  The through path of the coil member is configured by a cylindrical bobbin that protrudes to the outside of the coil member, and the through path formed in the second iron plate, the nonmagnetic member, and the permanent magnet. By inserting the bobbin, the second iron plate, the nonmagnetic member, and the permanent magnet can be positioned.

  The large diameter portion of the movable iron core preferably has a smaller diameter than the inner diameter of the bobbin. In addition, liquid silicon may be interposed between the movable iron core and the bobbin.

  A low friction member having a lower coefficient of friction than the movable iron core may be formed on the surface of the movable iron core. An example of the low friction member is a fluororesin.

  The first iron plate also serves as a part of a housing case body that houses the coil member, the second iron plate, the nonmagnetic member, and the permanent magnet.

  The energization control circuit has a first output signal that gradually decreases from a first frequency belonging to a delta wave band of an electroencephalogram to a second frequency lower than the first frequency, and a specific frequency lower than 1HZ. Energizing the coil only for a first time and after the first time has elapsed, stopping energizing the coil for a second time longer than the first time, After the second time elapses, the coil is energized for the same third time as the first time, and after the third time elapses for a fourth time longer than the second time. A third output signal having a periodic pattern for stopping energization of the coil, and a switching unit capable of selectively switching the first, second, and third output signals. To do.

  The sleep induction device is used by being incorporated in bedding, and examples of the bedding include pillows, futons, and sheets.

  According to the present invention, since the movable iron core can be moved between the first position and the second position without abutting the stop member, the vibrating body can be vibrated gently. Thereby, it is possible to provide a sleep guidance device having a high sleep effect.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment

  1 is a plan view of the bedding, FIG. 2 is a perspective view of the sleep induction device, FIG. 3 is an exploded perspective view of the sleep induction device, and FIG. 4 is a cross-sectional view taken along line AA ′ of the sleep induction device of FIG. FIG. 5 is an explanatory diagram of the operation of the sleep inducing device.

  In FIG. 1, reference numeral 1 denotes a mattress (bedding), and a pillow (bedding) 2 is placed on the mattress 1. The user 3 is sleeping upward with the back of the head in contact with the pillow 2.

  A pair of sleep guiding devices 4 is incorporated at a position corresponding to the upper arm of the user 3 in the mattress 1.

  Next, the configuration of the sleep induction device 4 will be described with reference to FIGS. 2 to 5. 11 is a U-shape comprising a first iron plate (first iron plate) 11a and a pair of upper and lower plates 11b extending in an X-axis direction (moving direction of the movable iron core 17) from an end surface of the first iron plate 11a. The case body. The first iron plate 11a and the upper and lower plates 11b are integrally formed, and a case through hole 111a is formed in the approximate center of the first iron plate 11a. As a material of the case body 11, iron is used.

  Reference numeral 12 denotes a coil member, and the coil 12b of the coil member 12 is wound around the outer peripheral surface of the tubular tube 12a. The coil 12b is electrically and mechanically connected to a control circuit 141 described later.

  First and second flange portions 12d and 12e having a diameter larger than that of the tubular tube 12a are formed on one end surface and the other end surface (end surface in the X-axis direction) of the tubular tube 12a, respectively.

  A cylindrical bobbin 12 c having a substantially equal inner diameter and outer diameter of the coil member 12 is press-fitted into the inner diameter portion (through passage) of the coil member 12. The dimension of the bobbin 12c in the X-axis direction is set longer than that of the cylindrical tube 12a. The bobbin 12c protrudes from the first flange portion 12d by the thickness of the first iron plate 11a, and the second The iron plate 13, the nonmagnetic member 14, the permanent magnet 15, and the fixed plate 16 protrude from the second flange portion 12 e by the total thickness dimension.

  The protruding portion of the bobbin 12c protruding from the first flange portion 12d is inserted into the case through hole 111a, and the first flange portion 12d is in contact with the inner surface of the case body 11 of the first iron plate 11a. Yes.

  The diameter dimension (dimension in the Z-axis direction) of the first flange portion 12d and the second flange portion 12e is set to be shorter than the distance between the pair of upper and lower plates 11b. Therefore, the coil member 12 is in a state of being hollowly supported in the space between the pair of upper and lower plates 11b.

  In the center of the second iron plate 13, an iron plate opening 13a having a diameter that is slightly larger than the outer diameter of the bobbin 12c is formed. A protruding portion of the bobbin 12c protruding from the second flange portion 12e is inserted into the iron plate opening 13a.

  As described above, when the bobbin 12c is inserted into the iron plate opening 13a, an external force is applied to the second iron plate 13 from a direction perpendicular to the longitudinal direction of the bobbin 12c (a direction perpendicular to the X axis). Since the bobbin 12c can be brought into contact with the wall portion of the iron plate opening 13a, the displacement of the second iron plate 13 can be reliably prevented.

  The end surface of the second iron plate 13 on the coil member 12 side is in contact with the second flange portion 12e.

  The dimensions of the second iron plate 13 and the first iron plate 11a in the Y-axis direction (direction perpendicular to the Z-axis) are set to be the same. Therefore, the end surfaces in the Y-axis direction of the second iron plate 13 and the first iron plate 11a are located in the same plane. The dimension in the Z-axis direction of the second iron plate 13 and the distance between the pair of upper and lower plates 11b are set to be the same. Therefore, the end surface of the second iron plate 13 in the Z-axis direction is in contact with the inner surface of the case body 11 in the upper and lower plates 11b.

  In the center of the nonmagnetic member 14, a nonmagnetic member opening 14a having an inner diameter dimension set slightly larger than an outer diameter dimension of the bobbin 12c is formed. A protruding portion of the bobbin 12c protruding from the second flange portion 12e is inserted into the nonmagnetic member opening portion 14a. The end surface of the nonmagnetic member 14 on the second iron plate 13 side is in contact with the second iron plate 13. The nonmagnetic member 14 is made of a material other than the magnetic material, and brass is used in this embodiment.

  By inserting the bobbin 12c into the nonmagnetic member opening 14a in this way, when an external force is applied to the nonmagnetic member 14 from a direction perpendicular to the longitudinal direction of the bobbin 12c (a direction perpendicular to the X axis). Since the bobbin 12c can be brought into contact with the wall portion of the nonmagnetic member opening 14a, the positional deviation of the nonmagnetic member 14 can be reliably prevented.

  The non-magnetic member 14 and the first iron plate 11a have the same dimension in the Y-axis direction. Therefore, the end surfaces in the Y-axis direction of the nonmagnetic member 14 and the first iron plate 11a are located in the same plane. The dimension of the non-magnetic member 14 in the Z-axis direction and the distance between the pair of upper and lower plates 11b are set to be the same. Therefore, the end surface in the Z-axis direction of the nonmagnetic member 14 is in contact with the inner surface of the case body 11 of the upper and lower plates 11b.

  In the center of the permanent magnet 15, a permanent magnet opening 15a having an inner diameter dimension set slightly larger than an outer diameter dimension of the bobbin 12c is formed. A protruding portion of the bobbin 12c protruding from the second flange portion 12e is inserted into the permanent magnet opening 15a.

  Thus, by inserting the bobbin 12c into the permanent magnet opening 15a, when an external force is applied to the permanent magnet 15 from a direction perpendicular to the longitudinal direction of the bobbin 12c (a direction perpendicular to the X axis), the permanent magnet 15 becomes permanent. Since the bobbin 12c can be brought into contact with the wall of the magnet opening 15a, it is possible to reliably prevent the displacement of the permanent magnet 15.

  The end surface of the permanent magnet 15 on the nonmagnetic member 14 side is in contact with the nonmagnetic member 14. The dimensions in the Y-axis direction of the permanent magnet 15 and the first iron plate 11a are set to be the same.

  Therefore, the end surfaces of the permanent magnet 15 and the first iron plate 11a in the Y-axis direction are located in the same plane. The dimension in the Z-axis direction of the permanent magnet 15 and the distance between the pair of upper and lower plates 11b are set to be the same. Therefore, the end surface in the Z-axis direction of the permanent magnet 15 is in contact with the inner surface of the case body 11 in the upper and lower plates 11b.

  As shown in FIG. 3, the permanent magnet 15 is formed of an N pole portion 15b (including the permanent magnet opening 15a) indicated by hatching magnetized to the N pole, and an S pole portion 15c magnetized to the S pole. Has been.

  In the center of the fixed plate 16, a fixed plate opening 16a having an inner diameter set slightly larger than the outer diameter of the bobbin 12c is formed. The fixed plate opening 16a has a second flange portion 12e. A protruding portion of the bobbin 12c protruding from the center is inserted.

  By inserting the bobbin 12c into the fixing plate opening 16a in this way, the fixing is performed when an external force is applied to the fixing member 16 from a direction orthogonal to the longitudinal direction of the bobbin 12c (a direction orthogonal to the X axis). Since the bobbin 12c can be brought into contact with the wall portion of the plate opening 16a, the displacement of the fixed plate 16 can be reliably prevented.

  The end surface of the fixed plate 16 on the permanent magnet 15 side is in contact with the permanent magnet 15.

  The dimensions of the fixed plate 16 and the first iron plate 11a in the Y-axis direction are set to be the same. Therefore, the end surfaces in the Y-axis direction of the fixed plate 16 and the first iron plate 11a are located in the same plane.

  The dimension in the Z-axis direction of the fixed plate 16 and the distance between the pair of upper and lower plates 11b are set to be the same. Therefore, the end surface in the Z-axis direction of the fixed plate 16 is in contact with the inner surface of the case body 11 in the upper and lower plates 11b. Moreover, the surface on the opposite side to the permanent magnet 15 of the fixed plate 16 is located in the same plane as the end surface in the X-axis direction of the upper and lower plates 11b.

  The fixing plate 16 is crimped and fixed to the pair of upper and lower plates 11b. Thereby, the coil member 12, the 2nd iron plate 13, the nonmagnetic member 14, and the permanent magnet 15 can be accommodated in the state fixed in the case body 11. FIG.

  The case body 11, the coil member 12, the second iron plate 13, the nonmagnetic member 14, and the permanent magnet 15 constitute a vibration body of the sleep induction device 4.

  Reference numeral 17 denotes a movable iron core, and the movable iron core 17 moves in the bobbin 12c. The movable iron core 17 is formed with a first small diameter portion 17b and a second small diameter portion 17c. With the movable iron core 17 positioned in the bobbin 12c (see FIG. 4), the first small diameter portion 17b and the second small diameter portion 17c are formed. The small diameter portion 17b is located in a region closer to the first iron plate 11a than the second small diameter portion 17c.

Of the movable iron core 17, the portions excluding the first and second small diameter portions 17b and 17c are formed by a large diameter portion 17a having a larger diameter than the small diameter portions 17b and 17c. The diameter of the large diameter portion 17a of the core 17c is set to be smaller than the inner diameter of the bobbin 12c, and silicon oil is interposed in the region formed between the movable iron core 17c and the bobbin 12c. Further, a low friction coating made of a fluororesin is formed on the outer peripheral surface of the movable iron core 17.

  Next, a control circuit (energization control circuit) 141 that controls energization of the coil 12b will be described with reference to FIG. Here, FIG. 6 is a block diagram of a control circuit for controlling energization to the coil 12b. 141a is a CPU that controls energization to the coil 12b, and 141b is an oscillator that supplies a clock signal having a predetermined frequency to the CPU 141a. 141c is an output circuit that outputs a current to the coil 12b based on a control signal from the CPU 141a.

  Reference numeral 141d denotes a reset circuit. When the power is turned on, the CPU 141a is held in a reset state until the power supply voltage rises normally and the peripheral circuit is stabilized. Further, when the power is turned off, the CPU 141a and peripheral logic are instantly returned to the initial state. A power supply control circuit 141e distributes the power supply voltage to the CPU 141a, the output adjustment circuit 141f, and the output circuit 141c. Reference numeral 141c denotes an output adjustment circuit which sets the output magnitude with a stepless volume.

  141g is an operation mode selection switch. By operating this operation mode selection switch 141g, the vibration pattern of the sleep guiding device 4 can be selected.

  In this embodiment, a delta mode that outputs a signal belonging to the delta band, a mother mode that simulates the knocking vibration when the mother lays down the baby, and a comfortable rail sound when the train is shaken are simulated. A train mode expressed as a model, and these three vibration patterns can be selected.

  The waveform of each vibration pattern is shown in FIG. 7, where (a) is the delta mode, (b) is the mother mode, and (c) is the train mode. When the delta mode is set, the output signal gradually decreases (first output signal) in a period of 180 seconds from 3.5 HZ to 0.75 HZ belonging to the delta wave band of the brain wave.

  When the mother mode is set, a signal having a fixed frequency of 0.75 HZ is output (second output signal). This gives the user a vibration that resembles the abrasion of the hand when the baby is laid down.

  When the train mode is set, in order to simulate the intermittent vibration state when getting on the train, the coil 12b is energized with a periodic pattern of 150 ms energization → 300 ms stop → coil 12b energization with 150 ms → 1000 ms stop. 12b is energized.

  Thereby, the user 3 can select the optimal vibration pattern according to the objective and physical condition. Note that a 1 / f fluctuation signal that vibrates in a 1 / f fluctuation pattern may be superimposed on the signal. Further, in this specification, the “delta wave band of electroencephalogram” means a band from 0.5 Hz to 4.0 Hz.

  Reference numeral 141h denotes an operation start / stop switch that instructs the CPU 141a to start and stop the operation. 141i is an operation time selection switch that allows the time for vibrating the sleep inducing device 4 to be adjusted in two stages of 30 minutes and 15 minutes.

  Next, the operation of the sleep inducing device 4 will be described with reference to FIG. First, the position of the movable iron core 17 in the energization prohibited state before flowing current through the coil 12b will be described. In the energization prohibition state, the movable iron core 17 is attracted to the permanent magnet 15 by a magnetic field generated between the second iron plate 13 and the fixed plate 16 (see FIG. 5A).

  At this time, the second small diameter portion 17c is located on the left side of the second iron plate 13, that is, on the first iron plate 11a side, and the right end of the second small diameter portion 17c and the second iron plate 13 The left end surface (the surface in contact with the second flange portion 12e) is located in the same plane.

  The left end of the movable iron core 17 is located on the right side of the first iron plate 11 a, that is, in a region close to the second iron plate 13. The position of the movable iron core 17 illustrated in FIG. 5A corresponds to the first position described in the claims.

  When the coil 12b is energized in the state illustrated in FIG. 5A (when energization is permitted), the end of the movable iron core 17 on the permanent magnet 15 side becomes an N pole, and the movable iron core 17 and the permanent magnet 15 and the attractive force generated between the case body 11 and the second iron plate 13 cause the movable iron core 17 to move in the direction of arrow A (on the first iron plate 11a side) in the bobbin 12c. To do.

  At this time, the case body 11 vibrates due to the reaction (the movable iron core 17 moves relative to the case body 11), and the vibration can be transmitted to the user 3 through the mattress 1. Since this vibration pattern corresponds to the output pattern of FIG. 7, an effect of guiding the user 3 to sleep can be obtained.

  Here, when the case body 11 vibrates or an external force is applied from the user 3 to the sleep guiding device 4, the movable iron core 17 may come into contact with the peripheral wall portion of the bobbin 12c. In this case, since the silicone oil is interposed between the movable iron core 17 and the bobbin 12c, the contact sound generated at the time of contact can be suppressed and the movable iron core 17 can be moved smoothly.

  Similarly, since the outer peripheral surface of the movable iron core 17 is covered with the fluororesin, the contact sound generated at the time of contact can be suppressed and the movable iron core 17 can be moved smoothly. Thereby, it is possible to prevent the contact sound from becoming an abnormal sound that disturbs sleep and entering the hearing of the user 3.

  The movable iron core 17 that has moved in the direction of arrow A stops at the position illustrated in FIG. The position illustrated in FIG. 5B corresponds to the second position described in the claims.

  Specifically, the left end of the first small diameter portion 17b is located on the right side of the first iron plate 11a, and the left end of the movable iron core 17 (the left end of the large diameter portion a). ) Is located in the bobbin 12c (that is, it does not protrude from the case body 111a).

Next, a prevention function for preventing the movable iron core 17 from coming off will be described with reference to FIG. Here, FIG. 8 is a schematic view schematically showing the function of preventing the movable iron core from coming off. As shown in FIG. 8B, the movable iron core 17 does not stop at the second position and is further leftward. (For example, the case where an external force is applied to the sleep inducing device 4 by the user 3 is applicable). In this case, the distance between the movable iron core 17 and the first iron plate 11a is increased and the magnetic resistance is increased compared to the case where the movable iron core 17 is located at the second position. Return to position 2.

  As described above, in this embodiment, the first small diameter portion 17b is provided to prevent the movable iron core 17 from coming off from the bobbin 12c. In addition, unlike a normal solenoid, there is no contact member for stopping the movable iron core 17 at the drive end, so that it is possible to prevent the generation of abnormal noise that hinders sleep.

In addition, as shown in FIG. 8A, the movable iron core 17 that moves to the first position may move further to the right without stopping at the first position (indicated by a dotted line) (for example, This applies to the case where an external force is applied to the sleep guiding device 4 by the user 3). In this case, the distance between the movable iron core 17 and the second iron plate 13 is increased and the magnetic resistance is increased as compared with the case where the movable iron core 17 is located at the first position. Return to position 1. Thereby, the same effect as the case of FIG.8 (b) can be acquired.
(Other embodiments)
In the above-described embodiment, the sleep inducing device 4 is included in the mattress 1, but may be included in the pillow (bedding) 2. Further, a sheet body (bedding) incorporating the sleep induction device 4 may be laid under the legs, wrapped around the legs, or interposed between the mattress 1 and the pillow 2. In this case, the vibration position can be easily changed simply by changing the position of the sheet body. Therefore, a vibration position suitable for each user 3 can be selected.
(Example)
An Example is shown and the content of this invention is demonstrated concretely. As shown in Table 1, a sleep latency test was conducted on 10 subjects (6 men, 4 women, average age 35.6 years). Each subject was laid on a mattress incorporating the sleep induction device 4 of the present invention, and the sleep latency was measured using a PSG (polysomnography) recording device polymate. The recording method and the sleep latency determination method were based on the sleep latency repetition test (MSLT). The comparative example shows the case of no vibration, Example 1 shows the above-mentioned relaxation mode, Example 2 shows the above-mentioned mother mode, and Example 3 shows the above-mentioned train mode. .

  Table 2 shows the average sleep latency of 10 people for each vibration pattern.

  The comparative example was 12.8 minutes, Example 1 was 8.0 minutes, Example 2 was 9.2 minutes, and Example 3 was 9.4 minutes. Thereby, it turned out that a high sleep asleep effect can be acquired by using the sleep guidance device of the present invention. In repeated analysis of variance with Greenhouse-Geyser correction, the effect of this sleep induction device on sleep latency is significant (p <0.05), and subsequent tests using t-test are more relaxed than comparative examples. The sleep latency was significantly shortened in the mode (p <0.01) and the train mode (p <0.05). That is, it was recognized that the risk factor p = 0.01 or 0.05 was significant, and it was found that a high sleep effect can be obtained.

It is a top view of bedding. It is a perspective view of a sleep guidance device. It is a disassembled perspective view of a sleep guidance apparatus. It is AA 'sectional drawing of the sleep guidance apparatus of FIG. It is operation | movement explanatory drawing of a sleep guidance apparatus. It is a block diagram of the control circuit which controls energization to a coil. It is a wave form diagram which shows an output waveform, (a) is a delta mode, (b) is a mother mode, (c) is a train mode. It is the schematic diagram which showed typically the fall prevention function of a movable iron core.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mattress 2 Pillow 3 User 4 Sleep guidance apparatus 11 Case body 11a 1st iron plate 11b Top and bottom plate 12 Coil member 12a Tube 12b Coil 12c Bobbin 12d 1st flange part 12e 2nd flange part 13 2nd iron plate 13a Iron plate opening 14 Nonmagnetic member 14a Nonmagnetic member opening 15 Permanent magnet 15a Permanent magnet opening 15b N pole 15c S pole 16 Fixed plate 16a Fixed plate opening 17 Movable iron core 17a Large diameter portion 17b First small diameter Part 17c Second small diameter part 111a Case through hole 141 Control circuit 141a CPU
141b Oscillator 141c Output circuit 141d Reset circuit 141e Power supply control circuit 141f Output adjustment circuit 141g Operation mode selection switch 141h Operation start / stop switch 141i Operation time selection switch

Claims (7)

A sleep induction device that guides a user to sleep by vibrating a vibrating body provided in the bedding,
A vibrating member formed by juxtaposing a first iron plate, a coil member in which a coil is wound in a cylindrical shape, a second iron plate, a nonmagnetic member, and a permanent magnet;
A movable iron core capable of moving in a through passage extending from one end side to the other end side in the juxtaposed direction of the vibrators;
An energization control circuit for controlling energization to the coil,
When the energization control circuit prohibits the energization of the coil, the movable iron core is attracted to the permanent magnet, and thus is moved to a first position in the through-hole formed in the permanent magnet. In the through passage formed in the first iron plate, repelling the permanent magnet when the energization control circuit permits energization of the coil. A sleep guidance device that moves relative to the vibrating body toward the second position. The movable iron core is formed in a region having a large diameter portion, a first small diameter portion having a smaller diameter than the large diameter portion, and a region closer to the second iron plate than the first small diameter portion. A second small diameter portion having a smaller diameter than the portion,
In a state where the movable iron core is located at the first position, the second small diameter portion is located in a region closer to the first iron plate than the second iron plate,
The first small diameter portion is located in a region closer to the second iron plate than the first iron plate in a state where the movable iron core is located at the second position. Item 4. The sleep induction device according to Item 1. The through path of the coil member is constituted by a cylindrical bobbin that protrudes to the outside of the coil member,
The second iron plate, the nonmagnetic member, and the permanent magnet are positioned by inserting the bobbin into the through path formed in the second iron plate, the nonmagnetic member, and the permanent magnet. The sleep induction device according to claim 2, wherein:   The first iron plate also serves as a part of a housing case body that houses the coil member, the second iron plate, the nonmagnetic member, and the permanent magnet. The sleep induction device according to any one of the above.   The energization control circuit has a first output signal that gradually decreases from a first frequency belonging to a delta wave band of an electroencephalogram to a second frequency lower than the first frequency, and a specific frequency lower than 1HZ. Energizing the coil only for a first time and after the first time has elapsed, stopping energizing the coil for a second time longer than the first time, After the second time elapses, the coil is energized for the same third time as the first time, and after the third time elapses for a fourth time longer than the second time. A third output signal having a periodic pattern for stopping energization of the coil, and a switching unit capable of selectively switching the first, second, and third output signals. The sleep induction device according to any one of claims 1 to 4.   A bedding comprising the sleep induction device according to any one of claims 1 to 5.   The bedding according to claim 6, wherein the bedding is one of a pillow, a futon, and a sheet.