JPS6233799B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electrical system for a device that generates bodily sensations using electric signals in the bass range, in order to make the user feel deep bass sounds through the vibration of the eardrum and bodily sensations.
This invention relates to mechanical vibration transducers.

As the frequency of sound decreases from around 150Hz, the more we feel the air vibration as sound pressure with our bodies, rather than the sound being heard with our ears due to the vibration of the eardrum. So-called heavy bass sounds are air vibrations whose sound pressure is felt not only by the ears but also by the skin and body, and when the vibrations felt by the body and the hearing overlap,
People will feel true deep bass.

Therefore, in order to make deep bass sounds ideal, attempts have been made to generate bodily-sensible vibrations that are synchronized with electrical signals that drive speakers and the like.

In this case, the electro-mechanical vibration converter that generates bodily vibrations is created by forming an air gap with a yoke equipped with magnetic poles, placing a coil wound around a coil frame within the air gap, and generating vibration in the coil in response to an electric signal. There is a device that obtains vibration by the magnetic interference effect that occurs between the magnetic force and the magnetic force of the magnetic poles. The frame and the yoke are supported via a damper so that they can be relatively displaced. In this case, when supporting the coil frame on the yoke, the yoke supports it through a damper at a position offset from the position of the gap in which the coil is placed, so when it is attached to the diaphragm with a threaded rod, The problem remains that the coil in the gap shifts due to the load of the yoke, making it impossible to generate effective vibrations. Therefore, for example, it is possible to make the damper sufficiently hard to support the load of the yoke so that the coil is positioned correctly in the gap no matter what angle the main body is attached to. This means that sufficient vibration cannot be obtained. Furthermore, if the damper is made soft enough to produce deep bass vibrations, there remains the problem that the coil is not positioned correctly within the gap due to the load of the yoke, resulting in unstable operation.

Furthermore, since the coil frame is attached to the diaphragm using a threaded rod installed in the coil frame, the thickness in the width direction becomes thick, leaving a problem that the whole coil is bulky.

The present invention provides an electro-mechanical vibration converter in which a magnetic air is formed by a yoke having magnetic poles, the yoke is held in a case body by a damper, and a coil is positioned in the air gap. The outer peripheral edge of the case body is held by the case body, and the inner peripheral edge thereof is held by the yoke, and the case body is composed of a frame body having a coil and a frame body that houses the yoke, and the damper is held between the two frame bodies. This structure makes it possible to reduce the overall thickness and make it possible to accurately and easily attach the damper to the case body.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, a case body 1 of an electromechanical vibration converter is composed of frames 2 and 3 each having a dish-shaped cross section, and a horizontally extending plate is provided at the periphery of the opening of the frames 2 and 3. Flange portions 4 and 5 having a shape are provided integrally, and the frames 2 and 3 are assembled by butting the flange portions 4 and 5 against each other with the openings of both frames 2 and 3 facing each other. .

An outer peripheral edge 6a of an annular damper 6 made of an elastic material is sandwiched between the flanges 4 and 5 of the frames 2 and 3, and an inner peripheral edge 6b of the damper 6 is directed in the opposite direction to the flanges 4 and 5. It extends horizontally inward of the frames 2 and 3.

Next, a yoke including a magnetic pole 10 installed inside the case body 1 will be described. The yoke 8 is composed of a bottom plate 9 having a columnar portion 9a at the center and a top plate 11 having an annular shape. An annular magnetic pole 10 is mounted and fixed on the bottom plate with a columnar part 9a loosely fitted thereon, and a top plate 11 is attached to the magnetic pole 10.
1 and the columnar part 9a of the bottom plate 9
A magnetic annular air gap 12 is formed between the outer edge 9a' and the bottom plate 9, the magnetic pole 10, and the top plate 11, forming a magnetic circuit having the air gap 12. In order to support the yoke 8 in a plane position including the air gap 12 in the case body 1, the inner circumferential edge of the damper 6 is attached to a step 13 formed by the outer edge of the top plate 11 and the end face of the magnetic pole 10.
b are integrally fixed, and the case body 1 and the yoke 8 are configured to be movable relative to each other by the damper 6. In this embodiment, in order to support the yoke 8 in a plane position including the air gap 12 in the case body 1, the top plate 11 and the magnetic pole 10 form a stepped portion 13.
The damper 6 was fixed integrally to the
The mounting structure of the yoke 8 and the damper 6 is not limited to this, but the damper 6 may be arranged in a plane including the gap 12, and its outer circumferential edge 6a is attached to the case body 1, and its inner circumferential edge 6b is attached to the yoke 8. Any structure may be used as long as it can be fixed to each other. In this case, it is perpendicular to the axis of the gap 12 (the axis extending in the vertical direction in FIG. 2),
In addition, the yoke 8 is positioned at a plane including the gap 12, which passes through the center of the width of the gap 12 in the vertical direction in FIG. It is most desirable to support the case body 1 with a damper 6.

An opening 14 is formed in the center of the frame 2, and a cylindrical coil frame 15 attached to a plate 15a is fitted into the opening 14.
5 and the plate 15a are integrally fixed to the frame 3,
A coil 16 wound around the coil frame 15 is arranged within the gap 12.

17 is a terminal connected to the coil 16. Further, 18 is a screw hole for attaching the case body 1 to a diaphragm (not shown) built into a cushion or the like.

The electro-mechanical vibration converter configured in this way is
Using the flanges 4 and 5, it can be attached to a diaphragm built into a chair, cushion, etc. and,
When the coil 16 is energized with an electric signal that drives the speaker of the audio device through a low-pass filter, the magnetic interference between the magnetic force generated in the coil 16 and the magnetic force of the magnetic pole 10 causes an electric signal to be applied to the case body 1 via the damper 6. Supported yoke 8 and case body 1
A relative change occurs, causing a bodily sensation of vibration, which is transmitted to the diaphragm via the frames 2 and 3. In this case, the bodily sensation vibrations that occur are generated based on the electrical signals from the reproduced sound, so they are synchronized with the audio signals heard by the ears, and because they are based on the electrical signals in the bass range, they produce heavy bass. It is effective as a vibration when feeling. Note that a more desirable vibration effect can be obtained by variously changing the material of the damper 6 or its thickness. Also, the cutoff frequency of the low-pass filter varies depending on the sound source, but it is best to have a cutoff frequency of around 150Hz.

The frame 2 constituting the case body 1 has a dish-shaped cross section and a flange is provided at the opening edge of the frame 2, but as shown in FIG.
The case body 1 may be attached to a diaphragm (not shown) by extending in a direction away from the flange portion 4 and using that portion as a flange portion 4. The case body 1 may be attached directly to the diaphragm, or may be attached indirectly via another member that effectively transmits vibrations. Also,
In the embodiment described above, the yoke 8 was supported on the case body 1 by a single damper 6 located on a plane including the air gap 12, but as shown in FIG. In addition, the yoke 8 may be supported on the case body 1 by the damper 6 and the damper 20. If the yoke 8 is supported by the two dampers 6 and 20, the positional relationship between the gap 12 and the coil 16 can be made more appropriate by supporting the single damper 6. Further, although the frames 2 and 3 constituting the case body 1 have a dish-shaped cross section, the yoke 8 supported by the damper 6 is not limited to this.
The yoke 8
The frames 2 and 3 may have any cross-sectional shape as long as they can be installed inside the case body 1.

Since the present invention has the above-described configuration, it is easy to attach and fix the case and damper, reducing the number of parts, and by integrally forming the case and damper, a structure that is strong against external shocks can be obtained. . Furthermore, by holding the outer peripheral edge of the damper between the two frames of the case body, it becomes possible to accurately and quickly determine the positional relationship between the case and the damper in the height direction. Further, it is possible to reduce the thickness of the electro-mechanical vibration converter in the vibration direction.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the electro-mechanical vibration converter of the present invention. FIG. 2 is a sectional view taken along the line -- in FIG. FIGS. 3 and 4 are cross-sectional views similar to FIG. 2, showing other embodiments of the present invention. 1...Main body, 6, 20...Damper, 8...Yoke,
9... Bottom plate, 10... Magnetic pole, 11... Top plate, 12... Air gap, 16... Coil.

Claims (1)

[Claims] 1. An electro-mechanical vibration converter in which a magnetic gap is formed by a yoke having magnetic poles, the yoke is held within a case body by a damper, and a coil is positioned within the gap. , the outer peripheral edge of the damper is held by a case body and the inner peripheral edge by a yoke, and the case body is composed of a frame body having a coil and a frame body housing the yoke, and the damper is held by a yoke. Electricity characterized by being held between two frames.
Mechanical vibration transducer.