JPS5994997A - Electro-mechanical vibration transducer - Google Patents

Abstract

PURPOSE:To hold a position of a damper to a prescribed height by constituting a case main body of an electro-mechanical vibration transducer with a frame having a coil and a frame containing a yoke so as to couple the two frames and to make the fitting of a damper to the case main body easy. CONSTITUTION:The case main body 1 of the transducer is formed by the frames 2, 3 having dish shaped cross section, and frames 2, 3 are provided with flanges 4, 5 incorporatedly. An outer circumference 6a of a ring damper 6 having a vent hole made of an elastic member is clipped between the flanges 4, 5 of the frames 2, 3 and the damper 6 is prolonged into the frames 2, 3. An inner circumference 6b of the damper 6 is fixed to a step 13 of the yoke 8 having a magnet 10 contained in the case main body 1. An opening 14 is formed at the center of the frame 3, a cylindrical coil frame 15 fitted to a plate 15a is inserted to the opening 14 and the plate 15a is fixed incorporatedly to the flame 3. Then, the fitting of the damper 6 to the case main body 1 is made easy and the height is kept to a prescribed position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electro-mechanical vibration converter for use in a device that generates bodily sensations using electric signals in the bass range, in order to sense deep bass incense through the vibration of the eardrum and bodily sensations. be.

As the frequency of sound decreases from around 150 Hz, 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 deep 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 auditory sense overlap, a person can truly feel deep bass sounds. Become.

Therefore, in order to ideally experience heavy bass, 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 the bodily vibrations is created by forming an air gap with a yoke equipped with magnetic poles, placing a coil wound around a coil frame in the air gap, and generating vibrations 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. It is supported via a damper so that it can be displaced relative to the yoke.

In this case, when supporting the coil frame on the yoke,
Since the coil is supported by the yoke via a damper at a position offset from the position of the air gap, if it is attached to the diaphragm with a threaded rod, the coil in the air gap will be displaced due to the load of the yoke, which will prevent effective vibration. However, the problem remains that it is no longer possible to generate Therefore,
For example, by making the damper sufficiently hard to support the load of the yoke,
It may be possible to position the coil correctly within the gap no matter what angle the main body is attached to, but in this case, the desired deep bass vibration would not be obtained sufficiently.

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 thicker, leaving a problem that the whole coil is bulky.

Further, in this converter, since the cover and the mounting means are separated, there is a problem in using it in a place where a load is applied.

The present invention is intended to solve the above problems, and includes forming a magnetic gap using a yoke provided with magnetic poles, holding the yoke within a case body with a damper, and positioning a coil within the gap. In the electro-mechanical vibration converter, the coil is protruded from the case body so as to be located in the gap, the outer peripheral edge of the damper is held by the case body, and the inner peripheral edge is held by the yoke,
The case body is composed of a frame body having a coil and a frame body housing the yoke, and the coil and yoke are housed in the case body by connecting the two frame bodies together. It is characterized by this.

With this configuration, the dashper can be easily attached to the case body, and its position can be maintained at a predetermined height, and it can be used in places where loads are applied.

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 electro-mechanical vibration converter is composed of frames 2 and 3 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 portion 4. The frames 2 and 5 are assembled by abutting the flanges 4 and 5 with the openings of both frames 2 and 3 facing each other.

An outer peripheral edge 6a of an annular damper 6 having a ventilation hole 6C made of an elastic material is sandwiched between the flange parts 4 and 5 of the frames 2 and 5, and an inner peripheral edge 6b of the damper 6 is held between the flange parts 4 and 5. 5, that is, horizontally inward of the frames 2, 3.

Next, a yoke including a magnetic pole 10 installed inside the case body 1 will be described. The yoke 8 has a columnar part 9a in the center (bottom play) 9c! :% annular top plate 11
It consists of The bottom plate 9 has an annular magnetic pole 10.
A top plate 11 is attached to the magnetic pole 10, and the inner edge 11a of the top plate 11 and the outer edge 9a' of the columnar part 9a of the bottom plate 9 are fixed. A magnetic annular gap 12 is formed between the bottom plate? , the magnetic pole 10, and the top plate 11 constitute a magnetic circuit having an 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 6b of the damper 6 is integrally attached to the stepped portion 13 formed by the outer edge of the top plate 11 and the end face of the magnetic pole 10. The case main body 1 and the yoke 8 are configured to be able to be relatively displaced by the damper 6.

In addition, in this embodiment, the yoke 8 is attached to the case body 1 with a gap 1.
2, the top plate 11
Although the tamper 6 is integrally fixed to the stepped portion 13 between the yoke 8 and the magnetic pole 10, the structure for attaching the yoke 8 and the damper 6 is not limited to this. Any configuration can be used as long as it can be arranged in a plane including the case body 1 and its outer peripheral edge 6a can be fixed to the case body 1, and its inner peripheral edge 6b can be fixed to the yoke 8. In this case, it is perpendicular to the axis of the gap 12 (the axis extending in the vertical direction in FIG. 2), and
Gap 1 passing through the center of the vertical width of 2
It is most desirable for the yoke 8 to be supported by the damper 6 on the case body 1 at a position on a plane including 2.

An opening 14 is formed in the center of the frame 3, and the opening 14
has a cylindrical coil frame 1 attached to a plate 15a.
5 are fitted, and the coil frame 15 and plate 15a
is integrally fixed to the frame 3, and a coil 16 wound around the coil frame 15 is disposed 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 (illustrated path) built into a cushion or the like.

The electro-mechanical vibration converter configured in this manner is attached to a diaphragm built into a chair, cushion, etc. using the flanges 4 and 5. 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 1o causes it 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.
5 to the diaphragm. In this case, the bodily sensation vibrations that occur are generated based on electrical signals from the reproduced sound, so they are synchronized with the audio signals heard by the ears, and are based on electrical signals in the low frequency range. It is effective as a vibration when feeling heavy bass.

Note that a more desirable vibration effect can be obtained by variously changing the material of the damper 6 or its thickness. Further, the cutoff frequency of the low-pass filter varies depending on the sound source, but it is preferably about 150 Hz.

Although the frame 2 constituting the case body 1 has a dish-shaped cross section and a flange is provided at the opening edge thereof, as shown in FIG. The flange portion 4 may be used to attach the case body 1 to the diaphragm (the path shown in the figure). The case body 1 may be attached directly to the diaphragm, or may be attached indirectly via another member that effectively transmits vibrations. The outer peripheral edge 6a of the damper 6 is sandwiched between the flanges 4 and 5 to be attached to the case body 1, but as shown in FIG. The damper 6 may be attached to the case body 1 by fixing the outer peripheral edge 6a of the damper 6 to the holder 19. Further, in the above embodiment, the yoke 8 is 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. 20 may be added, and the yoke 8 may be supported on the case body 1 by the damper 6 and the damper 20. 2 dampers 6.2
If the yoke 8 is supported by the damper 6, the positional relationship between the air gap 12 and the coil 16 can be made more appropriate by supporting the single damper 6. Further, although the frames 2 and 5 constituting the case body 1 have a dish-shaped cross section, the yoke 8 is not limited to this, and the yoke 8 is designed such that the yoke 8 supported by the damper 6 and the case body 1 are relatively displaced.
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 configuration, firstly, the case and the damper can be easily attached and fixed, and secondly, the outer peripheral edge of the damper can be held in the frame of the case, and the frames can be connected together. By doing so, the positional relationship in the height direction between the damper and the case frame can be accurately determined. Fifth, by housing or sealing the coil and yoke in the case frame, the case becomes extremely strong against external shocks and can also be protected from dust. Fourth, by sealing the coil and yoke in the case frame, not only the frame that connects the diaphragm to which the coil is attached, but also the frame that houses the yoke vibrate relative to each other, causing the entire case to vibrate. The damper can vibrate uniformly, and the fifth damper has a ventilation hole, which makes it possible to increase the compliance of the damper against the pressure inside the sealed case body. It has various effects such as

[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. 5-5 are cross-sectional views similar to FIG. 2 and showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Main body, 6.20... Damper, 8... Yoke, 9... Bottom plate, 10... Magnetic pole, 11...
...Top plate, 12...Gap, 16...Coil. Figure 1 7 Fang 2 Figure 93F! ! ! J spear 4I! 5 Spear 5 Diagram

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 coil is protruded from the case body so as to be located in the gap, the outer peripheral edge of the damper is held by the case body, and the inner peripheral edge is held by the yoke, and the case body is a frame body having the coil. and a frame for housing the yoke, and the coil and yoke are housed within the case body by coupling the two frames together. converter. λ The electro-mechanical vibration converter according to claim 1, wherein the damper has a ventilation hole. 5. The electro-mechanical vibration converter according to claim 1, wherein the case body is a sealed body.