JPH02218294A - Magnetic vibrator and chair and bed having the same - Google Patents

Abstract

PURPOSE:To obtain a powerful vibration with small size by combining a cylinder with a drive coil wound thereupon to a moving body having a permanent magnet so as to form a simple vibrator. CONSTITUTION:A current in response to a change in an electric signal from an acoustic reproducing device flows to a drive coil 7 at the midposition of a vibrator 11. A cylinder 5 is moved vertically with a change in the magnetic force of lines in the magnetic field formed by the permanent magnet in response to a change in the current flowing to the coil 7 and vibrated. ln this case, the weight 8 placed to the cylinder 5 of the drive coil 7 is varied to allow the user's body to sense the sound at a low frequency as vibration freely. The vibrator 11 as above is mounted to a frame of a rear face of a chair and a conventional small sized speaker to listen to a voice is mounted to the ear, then the presence is reproduced and the mood is diverted with the chair.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a magnetic vibration device which is a device having realistic sensation reproduction and massage functions, and a chair and bed using examples of this vibration device.

<Conventional technology> For example, when trying to listen to music on an audio device such as a stereo, the sense of reality cannot be reproduced unless large, high-output speakers are used, since the system is generally limited to human hearing. Can not. This is said to be because, in the case of a live performance, not only the auditory sense, but also the sound waves, especially in the low frequency range, have the effect of subtly shaking the audience's bodies.

In view of this point, for example, the vibrator proposed in Japanese Utility Model Publication No. 50-34023 and Publication Utility Model Publication No. 53-50410 is attached to the frame of a chair, etc., and the body is vibrated by electrical signals from an audio device. A realistic sensation reproduction device has been proposed in which a speaker is attached to the ear.

<Problems to be Solved by the Invention> The vibrator presented in the above publication attempts to make the user experience sound in the low frequency range by vibrating a permanent magnet device that accounts for a large proportion of the weight of the vibrator. Therefore, it is inevitable to increase the size and output of the device.

In view of the above circumstances, the present invention has been developed by placing a weight on the cylindrical portion of the drive coil to change the low frequency range, and by slightly changing the structure of the speaker. The object of the present invention is to provide a vibrating device that solves the problem mentioned above, as well as a chair and a bed equipped with the vibrating device.

Means for Solving the Problems> The present invention provides a cylindrical body that has a movable body having a permanent magnet, a driving coil provided in the magnetic field of the permanent magnet, and that moves reciprocatingly when the coil is energized. and the cylindrical body is provided with a weight for vibrating the movable body. Another invention provides a vibration device ( This is a bed with a vibration device, and a magnetic vibration device is placed on the floor of the bed.

Due to the above structure, the current flowing through the drive coil disposed at the base of the cylindrical body is changed by changes in the electric signal from the sound reproduction device, and the lines of magnetic force in the magnetic field formed by the permanent magnet are It is made to vibrate due to changes in . Moreover, in this case, by changing the weight placed on the cylindrical part, the user can freely experience sound in the low frequency range as vibration.

<Example> The present invention will be described below based on the drawings of the example.

FIG. 1 shows a cross-sectional view of the vibrating device. Reference numeral 1 denotes a trumpet-shaped transmission plate with a fixing hole 8 in the tip flange 1a, and a permanent iron plate 2 is attached to the base of the transmission plate 1. magnet 3
and pole piece 4 are stacked and arranged, and the pole piece 4.
Permanent magnet 3 Brake 1/2. A cylindrical body 5 having a drive coil 7 wound around its outer periphery is supported by a flexible support film 10 which is stretched over the transmission plate 1 to form a single movable body. A weight 6 is integrally attached to the top of the cylindrical body 5 with an adhesive, and the whole constitutes a magnetic vibration device 11.

Next, to explain this effect, first, in use, the vibrating device 1 is fixed by screwing to a suitable vibrated body (not shown).

Here, a separately arranged sound reproduction device (not shown)
A current corresponding to a change in the electric signal from the vibration device is passed through the driving coil 7 located at the center of the vibration device. The cylindrical body 5 is caused to move up and down and vibrate due to changes in the lines of magnetic force in the magnetic field formed by the permanent magnets in response to changes in the current flowing through the coil 7. In this case, by changing the weight 6 placed on the cylindrical body 5 of the drive coil 7, it is possible to freely experience low frequency sounds as vibrations. Furthermore, if the weight 6 becomes so heavy that it burns out the coil, the change in acceleration as a reaction when the cylindrical body 5 on which the weight 6 is placed tries to fly out (according to the law of action and reaction) will cause the mass of the weight to change. Ij is applied to the movable body 9 in proportion to the vibration, and the vibration can be felt.

FIG. 2 shows an embodiment in which a magnetic vibration device is incorporated into a chair.
A vibration device 11 is disposed at the center of the backrest 13, and ordinary speakers 5 are provided on both sides of the top of the backrest 13. In the figure, ] is a transmission plate as described above, 2 is a plate, 6 is a weight, and 8 is a fixing hole.

As a demonstration example, we removed the movable plate from a 30W speaker with a diameter of 200+n+n and attached a cylindrical body with a driving coil wrapped around it.
When a 30g weight was placed on the back of a chair and driven by an audio amplifier, it was effective in vibrating the body of a sitting person sufficiently and comfortably.

That is, in order to attach such a vibration device 11 to the frame 14 on the back of the chair 2, a cushion or a cover is attached to the extent that the weight of the backrest 13 is not significantly changed, and a normal cushion or cover is attached to the ear to hear the sound. By attaching a small speaker 15, the chair can reproduce a realistic feeling and make you feel relaxed.

FIG. 3 shows another embodiment in which a magnetic vibration device is incorporated into the bed floor. in general. Bed] 6 floor surface 1.6 a is,
It is heavier than the back of the chair, and because a large amount of the entire weight is added to it, it is less susceptible to changes in acceleration. In this case, the frame portion to which the vibrating device 11 is fixed is suspended from all sides by flexible support portions 18 made of metal wires, springs, or synthetic resin belts from the frame portion 17 that constitutes the outer periphery of the bed 6. , the weight of the vibrating part of the vibrating device 11 can be reduced and vibration can be effectively generated.

That is, to drive the vibrating device 11 set here, in the same way as described above, an electric signal of music from the acoustic device is passed through the driving coil, and the cylindrical body is moved and vibrated in accordance with the change in this current, and this vibration is transmitted to the body lying on the body. It is intended to be communicated to the public. Here, for example, the cause of bedsores caused by a sick person lying on the bed for a long period of time is that the contact area between the body and the bed causes a blood circulation disorder. 1 and applying vibration to give a massage effect, it is also possible to improve blood circulation and prevent bedsores.

<Effects of the Invention> As described above, the magnetic vibration device of the present invention, as well as the chair and bed with the vibration device, are simple vibration devices that combine a movable body with a permanent magnet and a cylindrical body around which a driving coil is wound. By doing so, we can obtain small and powerful vibrations. In this case, by changing the weight placed on the cylindrical body, the user can freely experience sound in the low frequency range as vibration, and as the weight of the moon weight increases, the human body is vibrated more efficiently. If the current of the electric signal from the acoustic device is passed through the drive coil, vibrations with a sense of presence can be obtained. Of course, by incorporating this vibration device into the back of a chair and combining it with speakers, you can enjoy music with a sense of realism. In addition, this vibration device is incorporated into the bed,
If this vibration is applied to areas of the body that are prone to bedsores,
The vibration improves blood circulation and has the effect of preventing bedsores.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view of the main parts of the vibrating device, FIG. 2 is a perspective view of an embodiment incorporating a chair,
FIG. 3 is a perspective view showing the main parts of the bed-integrated embodiment. ]... Transmission plate, 2... Plate, 3... Permanent magnet, 4... Pole piece, 5... Cylindrical body, 6... Weight, 7... Drive coil, 9...・Movable body,] 2...Chair, 16...Bed.

Claims (3)

[Claims] 1. A movable body having a permanent magnet, a cylindrical body having a driving coil provided in the magnetic field of the permanent magnet, and reciprocating when the coil is energized, and the cylindrical body has the above-mentioned A magnetic vibration device characterized by being provided with a weight for vibrating a movable body. 2. A chair with a magnetic vibration device, characterized in that the movable body of the vibration device according to claim 1 is attached to the backrest of the chair. 3. A bed with a magnetic vibration device, characterized in that the movable body of the vibration device according to claim 1 is attached to the floor surface of the bed.