JPH0767199B2 - Vibration unit structure and sensational 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. , For example, 150H
The structure of the vibration unit that generates mechanical vibrations to enhance the sense of presence by converting low-range audio signals below Z into mechanical vibrations and experiencing them in synchronization with speaker playback. The present invention relates to a body acoustic sensor that is configured using the vibration unit.

[0002]

2. Description of the Related Art Conventionally, in this type of vibrating unit, a magnetic gap is formed by a yoke having magnetic poles, a voice coil is arranged in the gap, and an audio in a low range is applied to the voice coil. It has been proposed to obtain mechanical vibration by a magnetic interference action generated between a magnetic force generated in a voice coil and a magnetic force of a magnetic pole due to a signal.

As one means for propagating (outputting) the mechanical vibration of the vibrating unit to the diaphragm or the like, the yoke is supported in the case body of the vibrating unit via a damper, and the yoke and the case body are relatively displaced. In addition to the above structure, the case body is attached as a mounting member to a diaphragm or the like to output mechanical vibration. (See, for example, Japanese Patent Publication No. 58-9640).

In a structure such as this vibrating unit that outputs mechanical vibration through the case body, it is necessary to support the yoke in the case body so that the yoke can be swung in the vibration direction. As a supporting means for the yoke, one damper is positioned so as to be horizontal to the voice coil in a plane including a space where the voice coil is located (see, for example, Japanese Patent Publication No. 58-9640). ),
Alternatively, two dampers (for example, Japanese Patent Publication Sho 62
No. 33799).

Further, as another yoke supporting means, one having a structure for supporting the yoke by using a spring member provided in the case body (for example, refer to 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).

[0006]

In the conventional vibration unit, the structure in which the yoke is supported in the case main body through one ring-shaped damper is a magnetic circuit member composed of a magnet, a yoke and the like. Since the positional relationship with the voice coil is supported by a single ring-shaped damper, the voice coil and the magnetic circuit member, which are constantly displaced in the exciting direction relative to each other when the vibration occurs, are in the non-exciting direction. Positional deviation, that is, kinking occurs, and the voice coil and the yoke of the magnetic circuit member come into contact with each other to cause abnormal noise. This is a serious problem particularly in a structure in which a heavy magnetic circuit member is vibrated unlike a general speaker that vibrates a lightweight voice coil.

As one means for solving such inconvenience, it is conceivable to absorb the above-mentioned displacement by setting a wide gap between the voice coil, the yoke and the pole piece in advance. However, if the gap between the two is widened, the magnetic influence will decrease,
This has the disadvantage of affecting the electromagnetic performance and significantly reducing the vibration efficiency.

In order to solve such an inconvenience, a structure has been proposed in which two dampers are used to support a magnetic circuit constituent member such as a yoke. However, in such a structure, May cause abnormal vibration due to the resonance of the dampers.

As a magnetic circuit member supporting structure by another 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 is also 1
Similar to the structure using a single damper, there is a disadvantage that the voice coil and the magnetic circuit member are displaced from each other in the non-excitation direction. If the ring-shaped spring member is made thicker in order to eliminate this inconvenience, the vibrating operation of the magnetic circuit member is suppressed, and the vibration efficiency is deteriorated and the resonance frequency f0 becomes high.

Further, in the structure in which the yoke is suspended on the U-shaped bent spring member, one end of the U-shaped spring member is attached to the inside of the case body, so that the suspension is performed. When the yoke is vibrated, the spring member may be biased in the mounting direction, so that the yoke may come into contact with the voice coil and generate abnormal noise. Also, because the yoke is suspended by a spring member, it is a structure that is very difficult to align with the voice coil, and it is easily affected by external impacts, and the case body also becomes large, and downsizing is especially required. It is not suitable as a vibrating unit used in a vehicle body acoustic sensor.

The present invention provides a novel vibrating unit that solves various problems of the structure of the conventional vibrating unit described above, and a yoke that constantly fluctuates in the vibrating direction during vibration. The structure of the vibration unit capable of preventing the displacement of the positional relationship with the voice coil in the non-excitation direction, that is, the twisting phenomenon, improving the excitation efficiency and the vibration propagation efficiency, and sufficiently obtaining the deep bass vibration, and It is an object of the present invention to provide a sensory acoustic device configured by using the vibration unit.

[0012]

In order to achieve the above object, in the structure of the vibration unit of the present invention, a yoke having magnetic poles forms a magnetic gap, and a voice coil is arranged in this gap. However, in the vibration unit configured to obtain mechanical vibration by the magnetic interference effect generated between the magnetic force generated in the voice coil and the magnetic force of the magnetic pole in accordance with the audio signal applied to the voice coil, the cross-sectional shape is A U-shaped horizontally long main frame, a coil base plate for arranging the voice coil at a predetermined position in the main frame and fixing it to the main frame, and a yoke attached to or near the center of the voice coil. A plate damper made of a metal plate that is placed horizontally to the plate damper, and both ends of this plate damper are clamped so that they can swing. And a pair of elastic damper brackets having elasticity formed so as to absorb the expansion and contraction of the plate damper by following the expansion and contraction movement caused by the rocking of both ends of the plate damper in the vibration direction. .

Further, the structure of the vibration unit of the present invention is as follows.
In order to achieve the above object, each part is configured as follows. First, the voice coil has a bobbinless structure in order to effectively take a gap. Further, the insulating substrate of the voice coil and the coil base plate are provided with a plurality of communicating heat dissipation holes. Further, holes for mounting positions are provided in the central portion of the yoke, the central portion of the insulating substrate of the voice coil, and the coil base plate corresponding to the central portion of the insulating substrate so as to be coaxially aligned. . Further, the coil base plate is provided with an elongated hole for adjusting a mounting position on the main frame.

On the other hand, the plate damper is formed so that the plate width of the central portion to which the yoke is attached is wider than the plate width of both end portions thereof. In addition, this plate damper has a protrusion at the end and can be swung in the vibration direction by inserting it into the square hole of the bearing formed by bending this protrusion into the V-shape of the damper bracket. Supported by. Further, the yoke is attached to the plate damper via a cushioning member.

The sensational acoustic device of the present invention is equipped with magnetic poles.
A magnetic gap is formed by the yoke and the inside of this gap
The voice coil is placed in the
Magnetic force generated in the voice coil due to the audio signal
Between the magnetic field of the magnetic pole and the magnetic force of the magnetic pole
Vibration unit configured to obtain dynamic vibration and cross-sectional shape
With a horizontally long main frame with a U-shape and a voice
Place the coil in place in the mainframe and
A coil base plate for fixing to the in-frame, and
Mount the speaker in the center or near the center, and
Made of a metal plate that is placed horizontally
Plate damper and both ends of this plate damper.
Support it so that it can be swung, and
Following the expansion and contraction motion caused by the swing in the vibration direction
A pair of elastic dampers formed to absorb shrinkage
A receiving metal fitting, a baffle plate that is bent inward on the vibration output side of the vibration unit and is attached, and an elastic switch push plate that is attached so as to pass between two points of the baffle plate on the front side of the baffle plate, And a switch having a lever projecting into a space formed between the baffle plate and the switch push plate by penetrating the baffle plate.

The sensational sound device of the present invention is equipped with magnetic poles.
A magnetic gap is formed by the yoke and the inside of this gap
The voice coil is placed in the
Magnetic force generated in the voice coil due to the audio signal
Between the magnetic field of the magnetic pole and the magnetic force of the magnetic pole
Vibration unit configured to obtain dynamic vibration and cross-sectional shape
With a horizontally long main frame with a U-shape and a voice
Place the coil in place in the mainframe and
A coil base plate for fixing to the in-frame, and
Mount the speaker in the center or near the center, and
Made of a metal plate that is placed horizontally
Plate damper and both ends of this plate damper.
Support it so that it can be swung, and
Following the expansion and contraction motion caused by the swing in the vibration direction
A pair of elastic dampers formed to absorb shrinkage
A metal fitting, a baffle plate attached to the vibration output side of the vibration unit, a cushioning member provided on the front surface of the baffle plate, and a baffle plate having the cushioning member provided on the entire inside and the vibration unit and the cushioning member provided on the front surface. A bag-shaped cover that encloses its opening portion arranged on the back side, and a rear panel that is equipped with a plurality of heat dissipation holes and that is sandwiched inwardly near the opening portion of the bag-shaped cover and attached to the main frame of the vibration unit. It is equipped with .

[0017]

When a low-pitched audio signal is applied to the voice coil of the vibrating unit, a magnetic force is generated in the voice coil along with the applied audio signal, and due to a magnetic interference action generated between the voice coil and the magnetic force of the magnetic pole, The yoke attached to the plate damper and the voice coil attached to the main frame are relatively displaced to generate mechanical vibration.

At this time, the plate damper flexes slightly in the vibration direction from the horizontal state in accordance with the vibrating operation of the yoke, then returns to the horizontal state again, and then a series of vibrating motions of slightly bending to the opposite side are continued. To do. Along with the oscillating movement of the plate damper, both end portions of the plate damper, that is, the portion acting as the fulcrum, expands and contracts by repeating a slight movement in the horizontal direction while swinging. However, both ends of this pair of elastic damper fittings are
Since it is supported so as to slide in from both sides, this damper receiving metal fitting follows the expansion and contraction movement caused by the rocking of both ends in the vibration direction, and absorbs the expansion and contraction.

[0019]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a rear view showing an example of a state in which a baffle plate is attached to the vibration unit of the present invention, and FIG. 2 is a bottom view thereof. Figure 3
6 is a cross-sectional view showing a magnetic circuit member supporting structure, FIG. 4 is a perspective view showing a mounting state of a voice coil, FIG. 5 is a perspective view showing a mounting state of a yoke to a plate damper, and FIGS.
Is a plan view showing the main chassis, a front view and a sectional view taken along the line AA, FIG. 9 is a plan view showing the plate damper, FIGS.
FIG. 12 is a front view and a side view showing a damper bracket, and an enlarged sectional view of an essential part, and FIG. 13 is a front view of a baffle plate.

In the figure, reference numeral 1 is a main frame having a U-shaped cross section, which is made of a metal material such as iron or aluminum.
It is formed to be long in the lateral direction. At the central portion of the main frame 1 on the opening side, a voice coil 2 is arranged inward as shown in FIGS. 2 and 3. The voice coil 2 has a bobbin-less structure to improve the efficiency and size of the magnetic circuit. The insulating substrate 3 of the voice coil 2 is attached integrally by fitting a part thereof to the inner peripheral wall surface of one end of the voice coil. The insulating substrate 3 is attached to the coil base plate 6 with screws 4 and nuts 5. At this time, the signal input terminals 7 and 8 provided on the insulating substrate 3
Is inserted from the lower side of the elongated hole 9 of the coil base plate 6 and projects toward the upper surface side of the coil base plate 6. As shown in FIG. 1, lead wires 10 and 11 for transmitting an audio signal in a low range are soldered and connected to the signal input terminals 7 and 8, and are applied to the voice coil 2 through the signal input terminals 7 and 8. It

As shown in FIG. 4, the coil base plate 6 is provided with heat dissipation holes 13 which communicate with a plurality of heat dissipation holes 12 provided in the insulating substrate 3 of the voice coil 2. The heat generated from the voice coil 2 is radiated by the piston movement of the yoke 14 and the cool air is sucked in through the radiating holes 12 and 13 communicating with each other. Further, elongated holes 15 for adjusting a mounting position are provided at four corners of the coil base plate 6. When the coil base plate 6 is attached to the attachment piece 17 provided on the main frame 1 by passing the screw 16 through the elongated hole 15, the voice coil 2 can be positioned by adjusting the attachment position. Further, the coil base plate 6 is provided with a hole 18 for alignment.

A round through-rod (not shown) is inserted into the positioning hole 18, and a positioning hole 19 provided in the central portion of the insulating substrate 3 of the voice coil 2 and the yoke 1 are provided.
The voice coil 2 is adjusted by aligning the positioning hole 20 provided in the central portion of No. 4 (the similar hole 20 is also provided in the central portion of the magnet 24) in a straight line.
The positional relationship between the and yoke 14 can be set correctly. After this alignment, the screw 16 is tightened to firmly attach the coil base plate 6 to the main frame 1. further,
In the coil base plate 6, a hole 22 for mounting a cord bush 21 for fixing a wire rod (cord) for transmitting an audio signal in a low frequency range to be applied to the voice coil 2, a band (not shown) for binding the wire rod, etc. are passed. A hole 23 is provided.

Next, referring to FIGS. 3 and 4, the magnet 24
The yoke 14 provided with will be described. The yoke 14 is formed of a columnar member having a concave cross section, and a magnet 24 is fixed to the inner center of the yoke 14 in a loosely fitted state. Therefore, a magnetic annular gap is formed between the outer circumference of the magnet 24 and the inner wall surface of the columnar member having a concave cross section to form a magnetic circuit. The voice coil 2 is arranged in the gap. And
The yoke 14 is fixed to the center of the plate damper 25 so that the voice coil 2 can always be placed in the correct position in the air gap.

When the yoke 14 is attached to the plate damper 25 as described above, a cushioning member 26 such as rubber is attached to the yoke 14 and the plate damper 2 as shown in FIGS.
It is attached to the contact surface with 5 and is attached by a screw 27. By interposing the buffer member 26, a slight gap is formed between the yoke 14 and the plate damper 25. Due to the action of the buffer member 26 and the gap, there is a problem due to the bending that occurs during the vibration operation of the plate damper 25, for example, the corner of the outer periphery of the mounting surface of the yoke 14 and the upper surface of the plate damper 25 hit and the plate damper 25 is broken. To prevent such accidents. Further, by interposing the cushioning member 26 in this manner, the yoke 1
It is possible to disperse the stress applied to the mounting portion of No. 4 and more smoothly perform the vibration operation of the plate damper 25.

The plate damper 25 has a rectangular cross section in order to prevent twisting in the non-excited direction, and for that purpose is a flat plate-like metal plate made of iron, aluminum, brass, stainless steel or the like. It is made of elastic material. Furthermore, the plate damper 25 is, as shown in FIG.
The plate width of the central portion 25C to which the yoke 14 is attached is made wider than the plate widths of the both end portions 25A and 25B, and the strength of the plate damper 25 against mechanical vibration is increased.
The plate damper 25 formed in this way is positioned so as to be horizontal with respect to the voice coil 2, and both end portions 25A and 25B thereof are arranged apart from the inner wall surface of the main frame 1.

Next, an embodiment of the support structure for the plate damper 25 described above will be described with reference to FIGS. 1, 2 and 9 to 12. First, the plate damper 25 is swingably supported by a pair of damper receiving fittings 28 attached to the main frame 1 with both ends 25A and 25B held between them. This pair of damper brackets 2
Reference numeral 8 is made of a strong elastic material such as stainless steel or phosphor bronze so as to absorb the expansion and contraction of the plate damper 25 by following the expansion and contraction motion caused by the swinging of the both ends 25A and 25B in the vibration direction. There is.

The above support structure is composed of the following parts. That is, the supported plate damper 2
Protrusions 25D and 25E are formed on both end portions 25A and 25B of 5, respectively. On the other hand, the damper receiving fitting 28 is the support portion 28.
A is bent into a dogleg shape, and a square hole 28B is provided in the bent portion of this support portion 28A.
Further, a screw hole 28C for attaching to the metal fitting attaching portion 1B provided on the main frame 1 is provided at the lower end portion. Therefore, when the plate damper 25 is separated from the main frame 1 and is mounted horizontally with respect to the voice coil 2, the protrusions 25D and 25E of the plate damper 25 are formed in the holes 2 of the pair of damper receiving fittings 28.
It is firmly supported by being inserted into 8B and screwed to the main frame 1 while being sandwiched from both sides.

Further, since the rectangular hole 28B into which the protrusions 25D and 25E are inserted is provided in the bent portion of the support portion 28A in the V shape, the protrusion 25 is formed as shown in FIG.
Since the portions 28D of D and 25E that come into contact with the horizontal plane have a knife edge shape, the movement of the plate damper 25 in the vibration direction is made more reliable. In addition, the protrusion 25D is formed by the vertical inner wall surface portion 28E of the square hole 28B.
And 25E are prevented from swinging in the non-exciting direction.

In the vibrating unit having the support structure constructed as described above, when a low-pitched audio signal of, for example, 150 Hz is applied to the voice coil 2, a magnetic force is generated in the voice coil based on the applied audio signal. Due to the magnetic interference generated between the magnetic force of the voice coil 2 and the magnetic force of the magnet 24, the yoke 14 supported by the plate damper 25 and the voice coil 2 attached to the main frame 1 are relatively displaced. Mechanical vibrations can be generated. This mechanical vibration is propagated to the entire main frame 1, and this vibration can be output from the side surface of the main frame 1 located in the vibration direction. At this time, the plate damper 25 has a pair of damper receiving fittings 28.
Since the two end portions 25A and 25B are swingably supported in a state of being clamped, the expansion and contraction movement caused by the swing of the both end portions 25A and 25B of the plate damper 25 in the vibration direction is followed. The expansion and contraction can be absorbed.

By integrally attaching the baffle plate 29 formed as shown in FIG. 13 to the main frame 1 of the vibration unit constructed as described above, in addition to the vibration propagating effect of the main frame 1 itself, a wider range can be obtained. Vibration can be propagated. The baffle plate 29 is attached to the main frame 1 by screwing and fixing it to the attachment piece 30 and the boss 31 of the main frame 1 shown in FIGS. 6 and 7, and is attached in a curved state as shown in FIG. By bending the baffle plate 29 in this manner, it is possible to improve the feeling of fit to the waist of the person who feels it, and it is possible to more reliably propagate the vibration.

A switch mechanism for turning on / off an audio signal applied to the voice coil 2 is provided on the front surface of the baffle plate 29. In this switch mechanism, a lever 33 of a micro switch 32 attached to the main frame 1 is projected to the front side of the baffle plate 29 through a hole 29A provided in the baffle plate 29. Further, a switch push plate 34 having elasticity is attached to the front surface of the baffle plate 29. The switch push plate 34 is arranged so as to pass between two points of the curved baffle plate 29, and the lever 33 of the micro switch 32 described above is arranged.
Are projected into the space formed by the switch push plate 34 and the baffle plate 29. Switch push plate 34
Are two holes 29 that are provided in the baffle plate 29 at intervals.
It is inlaid in the state of having an elastic force between B. Therefore, when the user pushes the switch push plate 34 with his / her waist or the like, the switch push plate 34 moves toward the baffle plate 29, actuates the lever 33 of the micro switch 32 to turn on the switch, and outputs the audio signal. It is supplied to the voice coil 2 to start vibration.

14 to 16 show one embodiment of the sensible acoustic device S using the vibrating unit of the present invention.
As shown in FIG. 16, this sensible acoustic device S is configured by covering the vibrating unit and the baffle plate 29 with a bag-shaped cover 35. The front side of the baffle plate 29 is covered with a slightly thick buffer member 36 to prevent the vibration from being suppressed. Further, a cushioning member 37 is integrally attached to the inside of the cover 35,
It wraps around the vibration unit to prevent vibration from being suppressed.

Further, the opening of the bag-shaped cover 35 is located on the back side of the apparatus, and the vicinity of the opening edge is formed between the back side of the main frame 1 and the rear panel 38 attached to the main frame 1. It is sandwiched in between to enhance the design effect.

The heat generated by the voice coil 2, which is a problem when the vibration unit is covered with the cover 35, is treated by the piston motion of the yoke 14 so that the heat accumulated in the cylindrical space of the voice coil 2 is not generated. Through the heat dissipation holes 12 and 13 to the heat dissipation hole 39 of the rear panel 38, and heat is dissipated to the outside. In addition, heat other than the above is radiated to the outside directly from the heat radiation hole 39 of the rear panel 38. As described above, by forming the cover 36 in the shape of a bag, an opening for heat dissipation can be provided on the back side, and heat dissipation is facilitated.

Further, the rear panel 39 attached to the main frame 1 directly transmits the mechanical vibration transmitted to the main frame 1 to the seat portion or the backrest portion of the seat which is in contact with the rear panel 39. Since the information can be transmitted, the entire seat can be vibrated, and the sensation effect can be further enhanced.

FIG. 17 shows an example in which the sensational acoustic device S having the above-described structure is mounted on the seat of an automobile. Even when mounted on a car seat as shown in FIG. 17, the vibration unit main body is thin and small, and the baffle plate is thin and small. Therefore, the entire device can be configured in a small size, and a person who sits down can sit down. Does not give any sense of discomfort. In FIG. 17, reference numeral 41 is a remote controller for adjusting the vibration level, 42 is an amplifier, 43 is a car stereo, and 44 is a speaker.

[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 flat plate-shaped metal plate damper, so that the plate is made horizontal to the voice coil. The yoke is mounted and positioned by simply sandwiching both ends of the damper with a pair of damper receiving fittings and attaching the damper receiving fittings to the main frame, so that the positional relationship can be determined accurately and quickly. Further, since both ends of the plate damper are sandwiched by a pair of elastic damper brackets so as to be swingably supported, the both ends of the plate damper are caused to swing in the vibration direction. The expansion and contraction can be absorbed by following the expansion and contraction operation. Therefore, it is possible to firmly support the plate damper without disturbing the force of swinging at both ends.

Further, since the main frame having the U-shaped cross section and long in the lateral direction is used, the yoke, the magnet, the voice coil and the plate damper can be built in the space having the U-shaped cross section. The overall shape of the vibration unit can be made laterally long, and the thickness in the vibration direction can be reduced. further,
Since the cushioning member can be directly covered or applied around the main frame, not only the structure is extremely simple, but also the thickness of the entire sensational acoustic device can be reduced, and when a person sits down on the seat of the automobile, 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. In addition, the shape of the backrest portion as well as the shape of the space portion to be mounted can be surely followed, and integration with the seat can be facilitated. Then, even when the sensory acoustic device is mounted in the space of the seat described above, the heat accumulated inside the sensory acoustic device can be radiated to the outside through the ventilation hole on the back side.

Further, in the vibrating unit of the present invention, it is structurally possible to attach the yoke to the center of the plate damper and pre-attach the voice coil to the coil base plate in the preparatory processing stage. When assembling the, insert a plate damper with a yoke into the main frame, sandwich both ends of the plate damper with a pair of damper brackets, and attach it to the main frame, then attach the coil base with a voice coil. The structure is suitable for mass production because it is extremely easy to assemble because it only adjusts the mounting position of the plate and mounts it on the main frame.

[Brief description of drawings]

FIG. 1 is a rear view showing the overall configuration of a vibrating unit of the present invention.

FIG. 2 is a bottom view showing the overall configuration of the vibration unit of the present invention.

FIG. 3 is a sectional view showing a main part of a vibrating unit of the present invention.

FIG. 4 is a perspective view showing a voice coil and a coil base plate used in the vibrating unit of the present invention.

FIG. 5 is a perspective view showing a yoke portion and a plate damper used in the vibration unit of the present invention.

FIG. 6 is a plan view of a main frame used in the vibration unit of the present invention.

FIG. 7 is a front view of the main frame shown in FIG.

8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9 is a plan view of a plate damper used in the vibration unit of the present invention.

FIG. 10 is a front view of a damper bracket used in the vibration unit of the present invention.

11 is a side view of the damper receiving fitting shown in FIG.

FIG. 12 is an enlarged cross-sectional view of a main part of the damper receiving fitting shown in FIG.

FIG. 13 is a front view of a baffle plate used in the vibration unit of the present invention.

FIG. 14 is a perspective view showing an embodiment of a sensible acoustic device using the vibration unit of the present invention.

FIG. 15 is a perspective view of the sensory acoustic device shown in FIG. 14 viewed from the back side.

16 is a cross-sectional view of the sensory acoustic device shown in FIG.

FIG. 17 is a perspective view of a main part showing an example in which the sensory acoustic device shown in FIG. 14 is mounted on an automobile.

[Explanation of symbols]

1 is a mainframe. 2 is a voice coil.
3 is an insulating substrate. 6 is a coil base plate. 12
Is a heat dissipation hole. Reference numeral 13 is a heat dissipation hole. 14 is a yoke. Reference numeral 15 is an elongated hole for adjusting a mounting position. Reference numeral 18 is a hole for alignment. Reference numeral 19 is a hole for alignment. Reference numeral 20 is a hole for alignment. 24 is a magnet. Reference numeral 25 is a plate damper. Reference numeral 26 is a buffer member. 28 is a damper receiving metal fitting. 29 is a baffle plate. 32 is a micro switch. 34 is a switch push plate. Reference numeral 35 is a cover. 38 is a rear panel. S is a sensory acoustic device.

Claims (11)

[Claims] 1. A magnetic gap is formed by a yoke having a magnetic pole, a voice coil is arranged in the gap, and a magnetic force and a magnetic pole generated in the voice coil in accordance with an audio signal applied to the voice coil. In the vibration unit configured to obtain mechanical vibration by the magnetic interference generated between the main frame and the horizontally long main frame with a U-shaped cross section, and the voice coil at a predetermined position in the main frame. And a plate damper for attaching the yoke to the center or near the center and being arranged so as to be horizontal to the voice coil, and this plate. Both ends of the damper are clamped and supported so that they can swing, and the expansion and contraction movements caused by the swinging of both ends of the plate damper in the vibration direction are added. 1 having to elastically formed so as to absorb the expansion and contraction
A structure of a vibration unit characterized by having a pair of damper brackets. 2. The structure of the vibration unit according to claim 1, wherein the voice coil has a bobbinless structure. 3. The structure of a vibrating unit according to claim 1, wherein the insulating substrate of the voice coil and the coil base plate are provided with a plurality of radiating holes which communicate with each other. 4. A mounting position alignment hole having the same axis is provided in each of the center portion of the yoke, the center portion of the insulating substrate of the voice coil, and the portion of the coil base plate corresponding to the center portion of the insulating substrate. The structure of the vibration unit according to claim 1, wherein 5. The structure of the vibration unit according to claim 1, wherein the coil base plate is provided with an elongated hole for adjusting a mounting position on the main frame. 6. The structure of the vibrating unit according to claim 1, wherein the plate damper is formed such that a plate width of a central portion to which the yoke is attached is formed wider than plate widths of both end portions thereof. 7. The vibrating unit according to claim 1, wherein the support portion of the damper receiving bracket is formed by bending it into a dogleg shape to support the plate damper so as to be swingable in the vibration direction. Construction. 8. The support portion of the damper receiving bracket is formed by bending it into a dogleg shape, and the projection formed at the end of the plate damper is inserted into a square hole provided in the bent portion of the support portion, The structure of the vibration unit according to claim 1, wherein the plate damper is configured to be swingably supported in the vibration direction. 9. The structure of the vibration unit according to claim 1, wherein the yoke is attached to the plate damper via a buffer member. 10. A magnetic air gap is formed by a yoke having a magnetic pole, and a voice coil is disposed in the air gap, and a magnetic force generated in the voice coil accompanying an audio signal applied to the voice coil and a magnetic pole A vibrating unit configured to obtain mechanical vibration by a magnetic interference effect generated between the magnetic force and the magnetic force, and a laterally long mesh having a U-shaped cross section.
The main frame and voice coil in the main frame
For positioning and fixing to the main frame
Place the coil base plate and the yoke at or near the center.
Installed and placed so that it is horizontal to the voice coil.
This is the plate damper made of metal plate
Hold both ends of the damper to support it so that it can swing.
Expansion and contraction due to swinging of both ends of the boot damper in the vibration direction
Elasticity that follows movement and absorbs its expansion and contraction
Having a pair of damper receiving metal fittings, a baffle plate that is bent inward on the vibration output side of the vibration unit, and has elasticity attached so as to pass between two points on the front side of the baffle plate. 1. A sensory acoustic device comprising: a switch push plate; and a switch having a lever protruding into a space formed between the baffle plate and the switch push plate, the switch pushing plate penetrating the switch . 11. A form magnetic gap by a yoke having magnetic poles, a voice coil disposed to the gap in the magnetic force generated accompanied not the voice coil to the audio signal applied to the voice coil, magnetic poles a vibration unit configured to obtain the mechanical vibration by a magnetic interference action occurring between the magnetic force, long Mei laterally sectional shape has a U-shaped
The main frame and voice coil in the main frame
For positioning and fixing to the main frame
Place the coil base plate and the yoke at or near the center.
Installed and placed so that it is horizontal to the voice coil.
This is the plate damper made of metal plate
Hold both ends of the damper to support it so that it can swing.
Expansion and contraction due to swinging of both ends of the boot damper in the vibration direction
Elasticity that follows movement and absorbs its expansion and contraction
A pair of damper receiving metal fittings, a baffle plate attached to the vibration output side of the vibration unit, a cushioning member provided on the front surface of the baffle plate, and a cushioning member provided on the entire inner side of the vibration unit and the cushioning member on the front surface A bag-shaped cover that encloses the provided baffle plate and has its opening portion arranged on the back side, and a plurality of heat dissipation holes that sandwich the inside of the opening portion of the bag-shaped cover inward and the main of the vibration unit A sensory acoustic device comprising a rear panel attached to a frame.