JPH0716279B2 - Vibrating unit, method of manufacturing the same, and body acoustic device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an audio reproduction effect by air propagation from a speaker as well as an audio signal for driving the speaker, in order to make it possible to sense deep bass more ideally. , Eg 150Hz
Convert the following bass audio signal to mechanical vibration,
A vibrating unit that generates mechanical vibration to enhance the sense of presence by making the user feel the sound in synchronization with speaker reproduction, a method of manufacturing the vibrating unit, and a perceptual acoustic device using the vibrating unit. It is about. In particular, when a person sits down on the seat of an automobile, a vibration unit and a small sensation that can be mounted in a limited space such as a space formed at the intersection of the seat portion and the backrest portion and have high vibration efficiency and vibration propagation efficiency can be provided. And an audio device.

[0002]

2. Description of the Related Art Conventionally, in this type of vibration unit,
A magnetic air gap is formed by a yoke with a magnetic pole, and the voice coil is placed in this air gap. The magnetic force generated in the voice coil along with the low range audio signal applied to the voice coil and the magnetic force of the magnetic pole. There has been proposed a device configured to obtain a mechanical vibration by a magnetic interference action generated between the and.

As one means for propagating (outputting) the mechanical vibration of the vibrating unit to a diaphragm or the like, a screw rod is provided at the center of a vibrating member having a bobbin wound with a voice coil, and the machine is passed through this screw rod. There is a structure that outputs dynamic vibration to a diaphragm or the like. (For example, Japanese Patent Publication Sho 42-2
(See Japanese Patent No. 2997)

As another vibration output means, the yoke is held in the case body of the vibration unit via a damper so that the yoke and the case body are displaced relative to each other, and the case body is used as a mounting member. There is a structure that is attached to a diaphragm or the like to output mechanical vibration (see, for example, Japanese Patent Publication No. 58-9640).

In the latter vibration unit having a structure in which mechanical vibration is output through the case body, it is necessary to hold the yoke in the case body so as to be movable in the vibration direction. As a holding means for this yoke, in a plane including a void where the voice coil is located,
With one damper positioned so as to be horizontal to the voice coil (see, for example, Japanese Patent Publication No. 58-9640) or with two dampers (see, for example, Japanese Patent Publication No. 62-33799). ).

Further, as another yoke holding means, one having a structure for holding the yoke by using a spring member provided in the case body (see, for example, Japanese Patent Laid-Open No. 61-67400), or this spring member. There is a structure bent into a U-shape (for example, see Japanese Patent Laid-Open No. 63-197198, particularly FIG. 3 and its description).

Further, there is a structure in which a yoke held by a damper is supported slidably in an oscillating direction by using a ball bearing or a guide member having Teflon inside. (See, for example, JP-A-58-215200)

It has been proposed to construct a sensible acoustic device using a vibrating unit having the above structure.
Among these sensational sound devices, there are those that are mounted on the seats of automobiles, sofas, chairs, etc. at home. As one method of mounting the audible sound device on the seat of the car,
When a person sits down on a seat, there is a space available at the intersection of the seat and the backrest. (For example,
(See Japanese Examined Patent Publication No. 57-9273)

As described above, the vibrating unit is installed in order to be able to mount the sensational acoustic device so as not to give an uncomfortable feeling to a limited space formed at the intersection of the seat portion and the backrest portion of the seat. There is a structure in which the diaphragm is built in a thick portion of a flat plate or triangular diaphragm to reduce the thickness. (See, for example, Japanese Examined Patent Publication No. 57-9273).

Further, as a means for improving the effect of reproducing realistic sensation efficiently without using a plurality of vibrating units in the body acoustic device, a belt-shaped vibration transmitting plate made of a press board, urethane chips, polyurethane foam, etc. While closely fitting the vibrating member consisting of, an insertion hole is provided at a substantially central position in the vibrating plate and the vibrating member.
There is a structure in which the vibration unit is embedded in the insertion hole. (See, for example, Japanese Utility Model Publication No. 61-34795).

[0011]

Among the conventional vibration units, in the structure in which the yoke is held in the case body through one ring-shaped damper, a magnetic circuit composed of a magnet, a yoke, etc., Positional relationship with bobbin is 1
Since it is held only by a ring-shaped damper, the voice coil bobbin, which is constantly displaced in the vibration direction when vibration occurs, and the magnetic circuit are displaced from each other in the non-vibration direction, that is, kinked. The voice coil bobbin and the yoke of the magnetic circuit may come into contact with each other to cause an abnormal noise. In particular, unlike a general speaker that vibrates a lightweight voice coil bobbin, this is a serious problem in a structure in which a heavy magnetic circuit is vibrated. As one means for solving such inconvenience, it is conceivable to absorb the above-mentioned positional deviation by setting a wide gap between the voice coil bobbin, the yoke and the pole piece in advance. If the gap of is widened, the magnetic influence will decrease mutually,
This has the disadvantage of affecting the electromagnetic performance and significantly reducing the vibration efficiency.

As another means for solving such an inconvenience, a structure in which two dampers are used to support a magnetic circuit such as a yoke has been proposed, but such a structure exists. As for the resonance of the dampers,
Abnormal vibration may occur.

Further, in order to solve the above-mentioned inconvenience, there is a structure in which one of magnetic circuits such as a yoke is supported through a damper and the other is supported by using a guide member. Since the magnetic circuit is held by using two members, there is a drawback that the structure of the vibration unit itself becomes large. Further, as the damper for holding the magnetic circuit of the large-amplitude vibrating unit that allows users to experience deep bass below 150 Hz, it is necessary to use a ring-shaped damper with a relatively large area and thickness, which complicates the damper holding structure. In addition, it is difficult to downsize the vibration unit.

As a yoke holding structure by other means, there is a structure in which a ring-shaped spring member is attached to the outer periphery of the yoke and the yoke is supported by the case body by the ring-shaped spring member. This also has a disadvantage that the voice coil bobbin and the magnetic circuit are displaced from each other in the non-exciting direction, as in the structure using one damper described above. If the ring-shaped spring material is thickened to eliminate this inconvenience, the vibration operation of the magnetic circuit will be suppressed, and the vibration efficiency will deteriorate and the resonance frequency will increase.
There is a drawback that f0 becomes high.

There is also a structure in which a yoke is suspended on a U-shaped bent spring member. In this structure, one end of a U-shaped spring material is attached to the case body. Because of the structure, the spring member may be biased in the mounting direction during the vibration operation of the suspended yoke, and the yoke may come into contact with the voice coil to generate abnormal noise. In addition, since the yoke is suspended by the spring member, it is very difficult to align the position with the voice coil, and it is easily affected by external shocks, and the case body becomes large. It is not suitable as a vibration unit used for.

Further, of the conventional vibration units, in the case of the structure in which the case body is constructed as a mounting member for the diaphragm and mechanical vibration is output to the diaphragm through the case body, one vibration unit is sufficient. In order to obtain a vibration output that allows you to experience deep bass, it is necessary to use large parts for each member that composes the magnetic circuit. Therefore, the case body that encloses it will naturally be large, making it extremely difficult to downsize. Met. Further, since the vibration is propagated to the diaphragm through the case body and the vibration is transmitted from the diaphragm to the human body, there is a drawback that the vibration propagation efficiency is poor.

In order to reduce the size of the sensory acoustic device, there has been proposed a structure in which the vibrating unit is embedded in the thick portion of the diaphragm, but the size including the case body is placed in the vibrating plate. In order to embed it, it is necessary to make the vibration unit itself thin and small. Even if it is possible to manufacture a thin and small vibration unit, a vibration unit large enough to be embedded in the thick part of the diaphragm can obtain a vibration output enough to experience a satisfying deep bass sound. It is difficult, and it is necessary to use a plurality of vibration units.

The present invention provides a novel vibrating unit that solves various problems of the above-described conventional vibrating unit, and a yoke and a voice that constantly fluctuate in a vibrating direction during a vibrating operation. The positional relationship between the coil bobbin and the non-excited direction, that is, the twisting phenomenon is prevented, and the vibration efficiency and the vibration propagation efficiency are improved. The purpose is to provide a possible vibration unit. Further, the vibration unit of the present invention is thin and small,
In addition, when the person sits down on the seat or chair of the car, it can be installed in the space formed at the intersection of the seat and the backrest by making it possible to form a long shape in the lateral direction. However, it is an object of the present invention to provide a small-sized sensational acoustic device with a large vibration output, which makes it possible to easily perceive heavy low-frequency vibrations that are synchronized with the sound reproduced from the speaker.

[0019]

In order to achieve the above object, in the structure of the vibration unit of the present invention, the vibration propagation frame to which the voice coil is attached and the vibration propagation frame are positioned so as to be horizontal to the voice coil. In addition, it is composed of an elongated flat plate-shaped plate damper, both ends of which are spaced apart from each other and supported by the vibration propagating frame, and a yoke attached to the center of the plate damper. The vibration propagating frame has a voice coil in a space having a U-shaped cross section,
It incorporates a yoke and a plate damper that horizontally supports the yoke. Further, the plate damper is made of an elongated flat plate-shaped metal material having a rectangular cross section.
Further, the plate damper supports both ends so as to swing in the vibration direction, and bends symmetrical positions on both sides of the yoke mounting position in the vibration direction to form a buffer portion. When the vibration unit is used in a sensory acoustic device, it is more effective if the vibration output side of the vibration propagating frame is curved and formed so as to improve contact with a person's waist.

In the method of manufacturing the vibrating unit constructed as described above, first, the yoke having the magnetic poles is attached to the central portion of the elongated plate-shaped plate damper. Next, while inserting the plate damper into the vibration propagation frame having a U-shaped cross section with the yoke gap facing upward, position the plate damper so that it is horizontal to the voice coil, and Both ends are separated from the vibration propagation frame and attached. Further, there is a manufacturing method in which a voice coil is placed in a magnetic gap of the yoke to adjust its position, and then the voice coil is attached to the vibration propagation frame.

Further, in the sensory acoustic device of the present invention,
The object was achieved by covering the vibrating unit of the present invention with a cushioning material that prevents the vibration from being suppressed. Then, in the covered cushioning material, a ventilation hole is provided in a portion corresponding to at least one side edge of the vibration propagating frame so that the heat accumulated in the space having the U-shaped cross section of the vibration propagating frame is cross-sectionally U-shaped. It is configured so that heat can be radiated from the side surface through the space and the ventilation hole.

[0022]

When a low-pitched audio signal is applied to the voice coil of the vibrating unit constructed as described above, a magnetic force is generated in the voice coil in accordance with the applied audio signal and is generated between the voice coil and the magnetic force of the magnetic pole. Due to the magnetic interference action, the yoke supported by the elongated plate-shaped plate damper and the vibration propagating frame are relatively displaced, and mechanical vibration is generated. This mechanical vibration is propagated throughout the laterally long vibration propagation frame. Since the vibration thus generated is generated based on the audio signal reproduced from the speaker, it is synchronized with the sound reproduced from the speaker and vibrates due to the audio signal in the low frequency range. This is an effective vibration when you feel it with your body.

[0023]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the basic configuration of the vibration unit of the present invention,
FIG. 2 is a plan view. Reference numeral 1 is a vibration propagating frame, which is made of a metal material such as aluminum. A voice coil 2 is arranged at the center of the vibration propagation frame 1. The voice coil 2 is wound around the bobbin 3 and the bobbin 3
The insulating substrate 4 fitted and attached to is firmly fixed to the vibration propagation frame 1. Reference numeral 5 is a terminal connected to the voice coil 2, and the low-frequency audio signal applied to the terminal 5 is supplied to the voice coil 2.

Next, the yoke 7 having the magnetic pole 6 will be described. The yoke 7 is formed of a columnar member having a concave cross section, and is fixed in a state where the magnetic pole 6 is loosely fitted in the inner center position thereof. Therefore, a magnetic annular gap is formed between the outer circumference of the magnetic pole 6 and the inner wall surface of the columnar member having a concave cross section, thereby forming a magnetic circuit. The voice coil 2 is arranged in this space. Then, the yoke 7 is fixed to the central portion of the plate damper 8 so that the voice coil 2 can be always arranged in the correct position in the gap.

The plate damper 8 has a rectangular cross section to prevent twisting in the non-excited direction, and is made of a metal plate-like elastic material such as an elongated flat aluminum plate, brass, stainless steel or the like having a sufficient thickness. Both ends 8A and 8B are attached to the vibration propagation frame 1 at a distance. The plate damper 8 is attached so that the plate damper 8 itself is horizontal to the voice coil 2. Further, both end portions 8A and 8B of the plate damper 8 have a mounting structure that swings in the vibration direction.

In the vibrating unit configured as described above, when a bass audio signal is applied to the voice coil 2, the voice coil 2 is based on the applied audio signal.
A magnetic force is generated in. Due to the magnetic interference generated between the magnetic force of the voice coil 2 and the magnetic force of the magnetic pole 6, the yoke 7 supported by the plate damper 8 and the vibration propagation frame 1 to which the voice coil 2 is attached are relatively displaced. Mechanical vibration is generated. This mechanical vibration is propagated to the entire vibration propagation frame 1. Therefore, this vibration can be output from the surface of the vibration propagation frame 1 positioned in the vibration direction. Since the vibration thus generated is generated based on the audio signal reproduced from the speaker, it is synchronized with the sound reproduced from the speaker and vibrates due to the audio signal in the low frequency range. It is effective as vibration when you feel it with your body.

Next, a method of manufacturing the vibration unit of the present invention will be described based on one embodiment shown in the partially cutaway perspective view of FIG. 3 and the sectional view of FIG. First, the yoke 7 having the magnetic poles 6 is attached to the central portion of the plate damper 8 having a sufficiently long and slender flat plate shape. Next, the plate damper 8 is inserted into the vibration propagation frame 1 having a U-shaped cross section with the yoke gap facing upward. The plate damper 8 inserted in the space of the vibration propagating frame 1 is positioned so as to be horizontal to the voice coil 2, and both ends 8A and 8B of the plate damper 8 are separated from the inner wall surface of the vibration propagating frame 1. Installed in the closed state. further,
The voice coil 2 is arranged in the magnetic gap of the yoke 7 to adjust the mounting position. This position adjustment is performed by moving the fixing plate 9 to which the insulating substrate 4 of the voice coil 2 is attached. After the position adjustment is completed, the fixing plate 9 is attached to the vibration propagating frame 1 and the assembling work is completed.

Next, the mounting structure of the plate damper 8 in the form of an elongated flat plate having a sufficient thickness used in the vibration unit of the present invention, that is, both ends of the plate damper 8 in a state of being separated from the inner wall surface of the vibration propagation frame 1. An embodiment of a structure in which the portions 8A and 8B are attached so as to swing in the vibration direction will be described with reference to FIGS. First, a first embodiment shown in the plan view of the main part of FIG. 5 and the sectional view of the main part of FIG. 6 will be described. In the mounting structure of the first embodiment, the shaft mounting portion 10 is provided at the end portion 8A of the plate damper 8 (note that the other end portion 8B side is also configured similarly, so the description thereof is omitted). At the same time, the rod 11 is attached to the shaft mounting portion 10.
Insert and fix. Both ends of the fixed shaft rod 11 can be swung in the vibration direction and can be moved in the non-vibration direction by the bearings 12 provided on the upright side walls 1A, 1B of the vibration propagation frame 1. Is supported so that there is no Therefore, the plate damper 8 is displaced in the exciting direction based on the vibrating operation of the yoke 7, and the ends 8A and 8B can be swung according to this displacement. Further, by making the bearing 12 have a ball bearing bearing structure,
Both ends 8A and 8B of the plate damper 8 can be swung more smoothly, and at the time of vibrating operation of the plate damper 8, abnormal noise that may occur in the bearing portion due to this vibration is surely generated. Can be prevented.

Next, a second embodiment shown in the plan view of the essential portion of FIG. 7 will be described. The mounting structure of the second embodiment is
Pivot bearing 1 to both sides of the end 8A of the plate damper 8
3 are provided respectively, and the tip ends of both adjusting screws 14 threaded into the upright side walls 1A and 1B of the vibration propagating frame 1 are pivotally supported by the pivot bearing 13.
Therefore, the plate damper 8 is displaced in the exciting direction based on the vibrating operation of the yoke 7, and the end portion 8 is displaced in accordance with this displacement.
A and 8B can be swung.

Further, a third embodiment shown in the block diagram of FIG. 8 will be described. This mounting structure applies a force that tilts both ends 8A and 8B of the plate damper 8 by using a spring 15 and pulls the plate damper 8 upward, and uses a wedge-shaped support block 16 that is in contact with the upper surfaces of both ends 8A and 8B. 8 is pushed down, and the plate damper 8 is positioned. Therefore, the plate damper 8 is displaced in the vibration direction based on the vibration operation of the yoke 7,
The ends 8A and 8B can be swung in accordance with this displacement.

FIG. 9 is a constitutional view showing one embodiment of the plate damper used in the vibrating unit of the present invention. The structure of the plate damper shown in FIG. 9 is such that buffer portions 8C formed by bending in the vibration direction are provided at symmetrical positions on both sides of the yoke 7 attached to the central portion. The plate damper 8 is
As the yoke 7 vibrates, it moves like a piston in the vibration direction as shown by the dotted line. Along with this movement, the plate damper 8 is repeatedly applied with a pulling force toward the central portion, which may adversely affect the portion of the pivot bearing 13 described in FIG. 7, for example. Therefore, as in this embodiment, the plate damper 8 and the buffer portion 8 are provided.
By forming C, when the plate damper 8 is pulled in the center direction due to the vibration operation, the pulling force causes the buffer portion 8C to slightly expand toward both end portions 8A and 8B, and the plate damper 8 It acts to increase the effective length and absorbs the pulling force applied to the plate damper 8 toward the central portion. As a result, it is possible to prevent the influence on the pivot bearings 13 and the like provided on both ends 8A and 8B of the plate damper 8. The buffer portion 8C is formed by bending the waveform of the vibration propagating through the plate damper 8 into an arc shape so that no corner is formed at each bent portion in order to prevent the waveform from being disturbed at the bent portion. Is desirable.

FIG. 10 is a plan view showing another embodiment of the vibrating unit of the present invention, showing an embodiment constructed by partially modifying the vibrating unit shown in FIG.
The vibrating unit shown in FIG. 10 has a structure particularly suitable for a sensory acoustic device for an automobile. The characteristic of this vibration unit is that both ends 1 of the vibration propagation frame 8 are
7 and 18 are further extended and the side for outputting vibration in the exciting direction is curved inward. In this way, by bending both ends 17 and 18 of the vibration propagating frame 8 inward, it is possible to improve the fit of the person to the waist of the person who feels it, and to more reliably propagate the vibration output.

By integrally attaching the diaphragm 19 shown in FIGS. 11 and 12 to the curved surface formed on the vibration propagating frame 8, in addition to the vibration propagating effect of the vibration propagating frame 8 itself, a wider range can be obtained. Vibration can be propagated to. Although the vibration unit of the present invention described above is thin and small, it has a very good vibration efficiency and vibration propagation efficiency, and can output strong vibration. Therefore, it is relatively thin as illustrated in FIGS. Small diaphragm 1
A larger vibration propagation effect can be obtained only by adding 9.

FIG. 13 is a cross-sectional plan view showing the first embodiment of the sensible acoustic apparatus of the present invention. This sensory acoustic device
The periphery of the vibration unit of FIG. 3 is covered with a cushioning material 20 to prevent the vibration of the vibration unit from being suppressed. Therefore, the vibration of the vibration unit will be
Is output in the direction of the arrow a via and the vibration is transmitted to the human body. Since this vibration output is synchronized with the sound reproduced from the speaker and is based on the audio signal in the low-pitched sound range, it is effective as vibration when the user feels the deep bass sound.

The cushioning member 20 has a ventilation hole 22 for radiating heat.
Is provided. A plurality of the ventilation holes 22 are provided at the portions contacting both end edges of the vibration propagation frame 8. Therefore, the heat generated in the voice coil 2 and accumulated in the space having the U-shaped cross section of the vibration propagating frame 8 indicates the arrow b.
As shown by, the heat can be released through the space having a U-shaped cross section in the direction of the air holes 22 provided on both sides, and heat can be released through the air holes 22. Therefore, even when the sensory acoustic device configured as shown in FIG. 13 is installed in the space at the intersection of the seat portion 23A and the backrest portion 23B of the automobile seat as shown in FIG. Since it is formed on both sides of the sensory acoustic device, it does not hinder the heat dissipation action. Reference numeral 21 is a cover that covers the periphery of the cushioning material 20 in order to enhance the design effect.

FIG. 15 is a sectional plan view showing a second embodiment of the sensible acoustic apparatus of the present invention. This sensory acoustic device
11 and 12 to the vibration output side of the vibration unit of FIG.
In the structure in which the diaphragm 19 is attached, the periphery thereof is covered with the cushioning material 20, and the periphery thereof is further covered with the cover 21. This sensible acoustic device can increase the effective area of vibration by providing the vibration plate 19 in addition to providing both ends 17 and 18 of the vibration propagating frame, so that vibrations of the same phase can be spread over a wide range. Obtainable. Further, even when mounted on the seat of an automobile as shown in FIG. 16, the vibration unit main body is thin and small, and further, the vibration plate 19 is thin and small, so that the entire device can be made thin and small, The seated person will not feel any discomfort.

[0037]

As described above, in the vibrating unit of the present invention, the yoke can be fixed in advance to the central portion of the elongated plate-shaped plate damper, so that the plate damper can be arranged horizontally with respect to the voice coil. The yoke is mounted and positioned by simply attaching both ends of the to the vibration propagation frame, and the positional relationship can be accurately and quickly determined. Further, one elongated flat plate-shaped plate damper having a yoke attached to the center thereof is positioned so as to be horizontal to the voice coil, and both ends of the plate damper can be swung in the vibration direction. Since it is attached, unlike the conventional vibration unit, even if two dampers are provided or a guide for supporting the lower end of the yoke is not provided,
It is possible to prevent the voice coil from contacting (contacting) the yoke, and it is possible to stably vibrate the yoke with respect to the voice coil. Furthermore, since a long and thin plate damper is used as the plate damper, by selecting and calculating the material, the thickness and the dimension of the beam portion of the plate damper in advance,
It is possible to move the lowest resonance frequency to a lower frequency side, and it is possible to obtain an appropriate vibration output in the low frequency range. Further, since the plate damper is made of a sufficiently thick and slender flat plate and a metal member or the like having a rectangular cross section, it is possible to suppress the displacement of the yoke in the non-exciting direction, and it is possible to reduce the magnetic circuit installation position. The displacement can be prevented, the mounting on the vibration propagation frame is easy, and the vibration propagation frame and the plate damper can be configured to be as strong as an integral structure, so that they can be protected against external impact. It is possible to obtain a vibration unit having a strong structure. Further, by forming the buffer portion on the plate damper, the plate damper is accompanied by the vibration operation,
It is possible to absorb the pulling toward the center by increasing the effective length of the plate damper by this buffer portion, and it is possible to prevent the support structure at both ends of the plate damper from being adversely affected.

By using the laterally long vibration propagation frame having a U-shaped cross section, the yoke, the magnetic poles, the voice coil and the plate damper can be built in the space having the U-shaped cross section. Therefore, the shape of the entire vibration unit can be made laterally long, and the thickness in the vibration direction can be reduced. Further, since the cushioning material can be directly coated around the vibration propagating frame, not only the structure is extremely simple, but also the thickness of the entire perceptual acoustic device can be reduced, and when a person sits down on the seat of the car, Even if it is installed in a limited space such as a space formed at the intersection of the seat and the backrest, it does not affect the sitting comfort. Also, of course, the surface shape of the backrest part,
The shape of the space part to be mounted can be surely followed, and it can be easily integrated with the seat. Even when the sensational acoustic device is mounted in the space of the automobile as described above, the heat accumulated inside can be radiated from the both side surfaces through the ventilation holes, and the conventional technique is disclosed in, for example, Japanese Utility Model Publication No. 58-43355. Unlike the vibration unit described, which has a structure in which a ventilation hole is provided in the vibration direction, there is no possibility of closing the ventilation hole even if there is a body or a seat in the vibration direction.

Further, by adopting the above-mentioned manufacturing method as a method of manufacturing the vibration unit of the present invention,
At the stage of preparatory processing, it is structurally possible to attach the yoke to the center of the plate damper and pre-attach the voice coil to the fixed plate. After inserting the plate damper with a yoke and attaching both ends of the plate damper so as to be separated from the inner wall surface of the vibration propagating frame, adjust the mounting position of the fixed plate with the voice coil and attach it to the vibration propagating frame. The structure is very simple to assemble and is suitable for mass production.

[Brief description of drawings]

FIG. 1 is a sectional side view showing a basic configuration of a vibration unit of the present invention.

FIG. 2 is a plan view showing a basic configuration of a vibration unit of the present invention.

FIG. 3 is a partially cutaway perspective view showing an embodiment of the vibration unit of the present invention.

FIG. 4 is a sectional side view of the embodiment shown in FIG.

FIG. 5 is a plan view of an essential part showing a first embodiment of the mounting structure of the plate damper used in the vibration unit of the present invention.

6 is a cross-sectional side view of essential parts of the embodiment shown in FIG.

FIG. 7 is a plan view of an essential part showing a second embodiment of the mounting structure of the plate damper used in the vibration unit of the present invention.

FIG. 8 is a configuration diagram showing a third embodiment of the mounting structure of the plate damper used in the vibration unit of the present invention.

FIG. 9 is a configuration diagram showing an embodiment of the structure of a plate damper used in the vibration unit of the present invention.

FIG. 10 is a plan view showing a second embodiment of the vibration unit of the present invention.

FIG. 11 is a front view showing an embodiment of a diaphragm used in the vibrating unit of the present invention.

12 is a plan view of the embodiment shown in FIG.

FIG. 13 is a cross-sectional plan view showing a first embodiment of a sensory acoustic device using the vibrating unit of the present invention.

FIG. 14 is a perspective view showing an example of a state in which the sensory acoustic device of FIG. 13 is mounted on a seat of an automobile.

FIG. 15 is a cross-sectional plan view showing a second embodiment of the sensory acoustic device using the vibration unit of the present invention.

16 is a perspective view showing an example of a state where the sensory acoustic device of FIG. 15 is mounted on a seat of an automobile.

[Explanation of symbols]

 Reference numeral 1 is a vibration propagation frame. 2 is a voice coil. 3 is a bobbin. Reference numeral 4 is an insulating substrate. 5 is a terminal. 6 is a magnetic pole. 7 is a yoke. 8 is a plate damper. 8A and 8B are end portions. 8C is a buffer part. 9 is a fixed plate.

Claims (9)

[Claims] 1. A magnetic air gap is formed by a yoke having magnetic poles, a voice coil is disposed in the air gap, and a magnetic force is generated in the voice coil in accordance with an audio signal in a low range applied to the voice coil. In a vibration unit configured to obtain a mechanical vibration by a magnetic interference action generated between the magnetic force of a magnetic pole and a vibration propagation frame to which a voice coil is attached, the vibration propagation frame is positioned so as to be horizontal to the voice coil, and A vibrating unit comprising: an elongated flat plate-shaped plate damper, both ends of which are supported by a vibration propagation frame, and a yoke attached to the center of the plate damper. 2. The vibrating unit according to claim 1, wherein the plate damper is made of an elongated flat metal material having a rectangular cross section. 3. The plate damper is arranged so that both ends thereof are located apart from the inner wall surface of the vibration propagating frame, and at least one end of the plate damper is attached so as to swing in the vibration direction. The vibration unit according to claim 1. 4. A buffer part is formed by bending symmetrical positions on both sides of the yoke mounting position of the plate damper in the vibration direction,
2. The vibrating unit according to claim 1, wherein the plate damper is configured to absorb the pulling toward the center portion due to the vibration operation by increasing the effective length of the plate damper. 5. A voice coil, a magnetic circuit including a yoke, and a plate damper for horizontally supporting the yoke are incorporated in a space of a vibration propagation frame having a U-shaped cross section. The vibration unit according to claim 1. 6. The vibration unit according to claim 1, wherein the vibration output side of the vibration propagating frame is curved. 7. A first step of attaching a yoke having magnetic poles to a central portion of an elongated flat plate damper, and a plate in a vibration propagation frame having a U-shaped cross section with the yoke gap facing upward. A second step of inserting the damper, arranging the plate damper so as to be horizontal to the voice coil, and mounting both ends of the plate damper so as to be separated from the vibration propagating frame;
A method of manufacturing a vibrating unit, comprising a third step of mounting a voice coil on a vibration propagating frame after a voice coil is placed in a magnetic gap of a yoke for positional adjustment. 8. A magnetic air gap is formed by a yoke having magnetic poles, a voice coil is arranged in the air gap, and a magnetic force is generated in the voice coil along with an audio signal in a low range applied to the voice coil. , A vibration unit configured to obtain a mechanical vibration by a magnetic interference effect generated between the magnetic force of a magnetic pole and a vibration propagation frame having a U-shaped cross section with a voice coil attached, and a voice coil. The vibrating unit around the vibrating unit, which is composed of a long and narrow flat plate damper supported at a distance from the vibration propagating frame so as to be horizontally positioned, and a yoke attached to the center of the plate damper. A sensory acoustic device characterized by being covered with a cushioning material for preventing vibration from being suppressed. 9. A ventilation hole is provided in a portion of the cushioning material which is at least one side edge of the vibration propagating frame having a U-shaped cross section so that heat accumulated in the space having the U-shaped cross section of the vibration propagating frame is provided. The heat is radiated from the side surface through a space having a U-shaped cross section and a ventilation hole.
Sensory sound device.