JP4601410B2 - Speaker device - Google Patents

Description

  The present invention relates to a speaker device, and more particularly, to a speaker device using a ceiling base material, which is an interior plate of a ceiling portion of a vehicle, as a diaphragm and a vehicle interior plate configured by attaching a diaphragm drive unit to the diaphragm. Is.

  The speaker is composed of a diaphragm and a diaphragm drive unit that drives the diaphragm (hereinafter, this diaphragm drive unit is referred to as an exciter). The exciter drives the diaphragm with an electric signal input to the exciter. , Which converts electrical signals into sound. A typical electrodynamic exciter includes a voice coil to which an electric signal is input, and a magnetic circuit including a permanent magnet and a yoke for generating a magnetic field around the voice coil. The most common cone type speaker has a large diameter portion of a cone-shaped diaphragm supported by an edge, and a small diameter portion on the opposite side is driven by an exciter, so from the edge (speaker mounting surface) Some thickness was required to the back of the magnetic circuit.

  The speaker having such a structure is installed in a speaker box for listening to music outdoors or at home, and is also installed in a vehicle, for example, a passenger compartment of a passenger car and output from a radio or a car stereo device. It is used for sound reproduction of music and voice.

  However, when a cone type speaker is installed in the passenger compartment of a passenger car, a predetermined distance is required between the edge of the diaphragm and the back of the exciter, and therefore a predetermined thickness is required at the speaker installation location. It was. For example, if the speaker is installed in a door or ceiling, the door or ceiling will be thicker, or if the thickness of the door or ceiling is left as it is, There was a problem that a bulge protruding inward occurred.

  In order to solve this problem, Patent Document 1 discloses a thin speaker in which the shape of a diaphragm is changed from a cone shape to a disk shape to reduce the thickness of the speaker. However, even in this thin speaker, since the diaphragm is attached to a metal frame and used, it is insufficient for making the speaker thin.

  Therefore, a thin speaker using an exciter having a structure in which a cone-shaped diaphragm is omitted and an interior panel in the passenger compartment is used as a diaphragm has been proposed as a speaker installed in the passenger compartment of a passenger car.

  FIG. 1 shows the structure of a conventional exciter 10. FIG. 1 (a) shows a side view of the exciter 10 fixed to an interior panel 1 of an automobile with an adhesive, with a half from the center shown in a vertical section. Yes, (b) shows the exciter 10 of (a) as viewed from the back side.

  As shown in FIG. 1A, the exciter 10 is mounted on a round dish-shaped outer yoke 11 having a concave portion in which a side wall portion and a bottom portion are continuously formed, and on the bottom portion of the outer yoke 11. The magnetic circuit unit includes a disk-shaped permanent magnet 12 and a disk-shaped inner yoke 13 which is placed on the permanent magnet 12 and has a diameter slightly larger than the diameter of the permanent magnet 12.

  A gap is provided between the inner surface of the side wall portion of the outer yoke 11 and the outer peripheral surface of the inner yoke 13 of the magnetic circuit portion, and the voice coil 15 wound around the cylindrical bobbin 14 in the gap portion. Is located. The bobbin 14 is fixed to a coupler member 16 attached to the interior plate 1 of the automobile, and a leg portion 16a protruding toward the magnetic circuit portion side is provided on the outer peripheral portion of the coupler member 16. The surface of the coupler member 16 opposite to the bobbin 14 is fixed to the automobile interior board 1 with an adhesive. Further, in this example, the number of leg portions 16 a is three as shown in FIG. 1B, and the leg portions 16 a are provided at equal intervals on the outer peripheral portion of the coupler member 16. The leg portion 16 a is connected to the outer peripheral portion of the outer yoke 11 via the leaf spring 17.

  As shown in FIG. 1B, the leaf spring 17 includes an annular base portion 17b and an arm portion 17a extending concentrically from the base portion 17b to the base portion 17b. The distal end portion of the arm portion 17a is attached to the leg portion 16a by a screw 18. In this example, the lengths of the three arm portions 17a are all the same.

  When an AC drive signal is supplied to the voice coil 15 of the exciter 10 configured as described above, the bobbin 14 vibrates according to the frequency of the AC drive signal by the action of the magnetic circuit unit. This vibration is transmitted to the interior board 1 through the coupler member 16. And this interior board 1 itself plays the role of a diaphragm, and a sound is radiated | emitted to the vehicle interior side by the vibration of the interior board 1. FIG.

  Thus, by using the interior plate 1 as a diaphragm, a good sound field can be formed in the vehicle interior, and the thickness of the exciter 10 can be reduced by the amount not using the diaphragm. A thin speaker can be realized. However, in this structure, since the exciter 10 is fixed to the automobile interior board 1 with an adhesive, there is a problem that the exciter 10 cannot be removed from the interior board 1 even if an abnormality occurs in the exciter 10.

  Therefore, as shown in FIGS. 2A and 2B, the exciter 10 is screwed into the bracket 3 fixed to the interior plate 1 to vibrate the interior plate of the vehicle that can be detached from the interior plate 1. A loudspeaker has been proposed. In the speaker having this structure, a hole 20 is provided in the center of the coupler member 16 of the exciter 10 on the interior plate 1 side, and an inner screw part (female screw) 19 is provided on the inner peripheral surface of the hole 20. . Since the other configuration of the exciter 10 is the same as that of the exciter 10 described with reference to FIG. 1A, the same components are denoted by the same reference numerals and description thereof is omitted.

  On the other hand, the bracket 3 includes a flange portion 31 whose one surface is fixed to the interior board 1 with an adhesive or the like, and a screw portion 32 protruding from the other surface of the flange portion 31. The screw portion 32 is screwed into the inner screw portion 19 of the coupler member 16. A through hole 34 is provided in the center of the screw portion 32. Further, a ring-shaped cushion rubber 33 is fixed to the surface around the threaded portion 32 of the flange portion 31.

  FIG. 3 shows a state in which the exciter 10 is attached to the interior board 1 which is a ceiling base material by the bracket 3. The exciter 10 is attached to the space between the interior plate 1 and the roof plate 8 that is a metal plate via the bracket 3. Reference numeral 4 denotes an outer skin adhered to the interior side of the interior board 1.

Japanese Patent Laid-Open No. 9-130892 (FIG. 1)

  However, since the conventional exciter 10 configured as described above is mounted on the bracket 3 fixed on the interior plate 1, the exciter 10 is directly fixed to the interior plate 1 with an adhesive. Compared to the height of the flange portion 31 of the bracket 3 and the height of the cushion rubber 33, the height H is higher. For this reason, there is no problem when the exciter 10 is mounted on the interior plate 1 in the center of the vehicle. However, when the exciter 10 is mounted at the left and right positions of the vehicle, there are two intervals between the interior plate 1 and the roof plate 8. Since it is small as shown by the chain line, the top surface of the exciter 10 comes into contact with the roof plate 8, which causes a problem that it cannot be attached. Further, when the exciter 10 is forcibly installed at this position, it is necessary to cause the interior plate 1 to protrude toward the vehicle interior side, which causes a problem of reducing the head clearance. Further, even in a speaker device of a type in which an exciter is attached to a diaphragm, there is a demand for separating the exciter and the position of the diaphragm that is vibrated by the exciter.

  Therefore, the present invention provides a speaker device, in particular, a speaker using an interior plate of a vehicle as a diaphragm, in which an exciter is mounted on an interior plate such as a ceiling base material provided on the ceiling of the vehicle. Another object of the present invention is to provide a speaker device that can be mounted on the interior plate of the ceiling portion on the side of the vehicle by suppressing the height from the interior plate of the ceiling to the top surface of the exciter as much as possible. . Another object of the present invention is to provide a speaker device in which the exciter and the vibration plate vibrated by the exciter can be separated from each other even in a speaker device in which the exciter is attached to the diaphragm.

  The vehicle speaker device of the present invention that achieves the above object can take the following first to ninth embodiments.

  The first form includes an exciter that generates vibration by inputting an electric signal, and a coupler member that transmits the vibration of the exciter to the diaphragm, and the coupler member includes a vibration input unit that is connected to the vibration generating unit of the exciter; The vibration output unit that transmits the vibration to the diaphragm and the arm unit that connects the vibration input unit and the vibration output unit, and by inputting an electric signal to the exciter, A speaker device that vibrates the diaphragm.

  The second form is composed of an interior plate formed in the passenger compartment of the vehicle, a bracket provided on the interior plate, and an exciter provided with a coupler member connected to the bracket. It consists of a vibration input part connected to the vibration generating part of the exciter that generates vibration by input, a vibration output part attached to the bracket, and an arm part connecting the vibration input part and the vibration output part. By inputting, the speaker device is characterized in that the interior plate at a position distant from the interior plate directly under the exciter is vibrated.

  The third embodiment is a speaker device in which the vibration input portion of the coupler member in the second embodiment is supported on an interior plate by a damper.

In the fourth mode, the exciter of any one of the first to third modes has a magnetic circuit composed of a permanent magnet and a yoke plate, a spring member that supports the coupler member with respect to the magnetic circuit, and an electric signal input Thus, the speaker device is an electrodynamic exciter including a voice coil that vibrates the coupler member.

In the fifth embodiment, the exciter of any one of the first to third embodiments includes a piezoelectric element, a lead wire that vibrates the piezoelectric element by inputting an electric signal, and a coupler member attached to the piezoelectric element. This is a speaker device that is a piezoelectric exciter.

In the sixth mode, the exciter according to any one of the first to third modes includes a yoke plate, and a plurality of adjacent permanent magnets arranged on the yoke plate so that the polarities are opposite to each other. A coupler member, which is disposed at a position facing the permanent magnet and at a predetermined distance from the top surface of the permanent magnet, can be attached with a diaphragm on the surface opposite to the yoke plate, and around the yoke plate. An elastic body that elastically supports the coupler member, and a coupler member that is provided at a position corresponding to each of the permanent magnets and has a side in a direction perpendicular to the magnetic force line between the permanent magnets in one plane. Each coil is a speaker device that is an exciter having a configuration in which currents in the same direction flow between sides of adjacent coils.

In the seventh embodiment, the exciter of any one of the first to third embodiments surrounds the yoke plate, a plurality of permanent magnets arranged on the yoke plate with the same polarity, and the permanent magnets. A magnetic circuit having a bulging portion bulged to the same height as the permanent magnet in a portion around the permanent magnet of the yoke plate, and a top surface of the permanent magnet at a position facing the yoke plate is predetermined. A coupler member that is disposed at a distance and can be attached to a surface opposite to the yoke plate, an elastic body that is provided around the yoke plate and elastically supports the coupler member, and a permanent magnet of the coupler member Each coil is provided at a position corresponding to each piece, and has a coil wound in one plane so as to have a side perpendicular to the magnetic field line between the permanent magnets, and each coil is provided between adjacent coil sides. Different direction A speaker device current is exciter configuration is connected to flow in.

The eighth form is a speaker device in which the interior plate of the second or third form is formed of a foam member.

  According to the speaker device of the first embodiment, the vibration of the exciter can be transmitted to a part away from the exciter by the shape of the coupler member, so that the restriction on the arrangement of the exciter can be relaxed. Further, according to the speaker device of the second and third embodiments, the shape of the coupler member can transmit the vibration of the exciter to a part away from the part of the interior plate located directly under the exciter. Since the exciter installation position can be moved to a portion having enough space while the drive point of the interior plate is optimum, the restriction on the arrangement of the speakers on the interior plate of the vehicle can be relaxed.

Further, as shown in the fourth to seventh embodiments, according to the speaker device of the present invention, various forms of exciters can be employed. Furthermore, as shown in the eighth embodiment, the interior board can be formed from a foam member.

  Next, embodiments of the speaker device of the present invention will be described with reference to specific examples shown in the accompanying drawings. In this embodiment, the configuration of a speaker device using a vehicle interior plate as a diaphragm will be described, and the interior plate 1 will be described by taking the interior plate 1 provided on the ceiling of an automobile as an example.

  FIG. 4 (a) shows an embodiment of a speaker device using the automobile interior plate 1 of the present invention as a diaphragm. In the conventional speaker device described with reference to FIG. 3, the vibration of the exciter 10 is transmitted to the interior plate 1 immediately below by the coupler member 16, but the coupler member 46 of this embodiment is connected to the vibration generating portion of the exciter 10. The vibration input portion 46B, the vibration output portion 46C attached to the screw portion 32 of the bracket 3, and the arm portion 46A having a predetermined length connecting the vibration input portion 46B and the vibration output portion 46C. A mounting hole 46H is formed in the vibration output portion 46C. When the coupler member 46 is attached to the bracket 3, the attachment hole 46 </ b> H provided in the vibration output portion 46 </ b> C of the coupler member 46 is inserted into the screw portion 32 of the bracket 3 and fixed with the attachment screw 7. The mounting screw 7 includes a flange portion 71 and a screw portion 72 formed with a screw on the inner peripheral surface of the cylindrical pair. The outer periphery of the screw portion 72 is slidably fitted into the mounting hole 46H of the coupler member 46. It is supposed to be. In this figure, the cushion rubber 33 shown in FIG. 2B is not shown.

  FIG. 4B shows a state in which the exciter 10 is installed on the vehicle interior board 1 using the coupler member 46 and the mounting screw 7 shown in FIG. As shown in this figure, when the exciter 10 vibrates due to an electrical signal input to the exciter 10, this vibration is transmitted to the interior plate 1 at a position away from the interior plate 1 directly below the exciter 10 by the coupler member 46. . Since the height of the bracket 3, the vibration output portion 46 </ b> C of the coupler member 46 and the height of the mounting screw 7 is smaller than the height of the exciter 10, in this embodiment, the portion of the interior plate 1 that vibrates by the exciter 10 is It becomes possible to set it as the site | part close | similar to the side surface of the motor vehicle with the short distance of the interior board 1 and the roof board 8.

  Fig.5 (a) is sectional drawing of the ceiling part which shows the modification of the coupler member 46 shown to Fig.4 (a), (b). The coupler member 46 of this embodiment is different from the coupler member 46 shown in FIGS. 4A and 4B in that an arm portion 46A connecting the vibration input portion 46B and the vibration output portion 46C is formed obliquely. . When the arm portion 46 is formed obliquely in this manner, a space is generated between the vibration input portion 46B and the interior board 1, so that the degree of freedom in the installation position of the exciter 10 is increased. In this embodiment, the flange portion 31 of the bracket 3 can be embedded in the interior plate 1.

  In the configuration of the embodiment shown in FIG. 5A, since a space is generated between the vibration input portion 46B and the interior plate 1, the vibration input portion of the coupler member 46 as shown in FIG. The lower part of 46B can be supported by the damper 9. As described above, by supporting the lower portion of the vibration input portion 46B of the coupler member 46 with the damper 9, the length of the arm portion 46A can be increased.

  FIG. 6 (a) shows another embodiment of a speaker device using the automobile interior plate 1 of the present invention as a diaphragm. In this embodiment, a diaphragm 30 having a thickness smaller than the thickness of the interior plate 1 and a predetermined area is prepared, and the flange portion 31 of the bracket 3 is attached to one surface of the diaphragm 30, and the bracket 3 The exciter 10 is attached to the screw portion 32 of the above. The diaphragm 30 used in this embodiment can be an optimum diaphragm that can faithfully reproduce the vibration of the exciter 10.

  On the other hand, in this embodiment, the position where the exciter 10 of the interior board 1 is attached is cut out with the outer skin 4 left as shown in the figure, and the cut-out portion 29 is formed. The area of the cutout portion 29 is equal to or larger than that of the diaphragm 30. Then, the diaphragm 30 to which the exciter 10 is attached is inserted and fixed to the cutout portion 29 as shown in FIG. In this configuration, when the exciter 10 vibrates due to the input of an electrical signal, the vibration is radiated into the vehicle interior through the diaphragm 30, so that the sound quality of sound heard in the vehicle interior is improved. Moreover, since the thickness of the diaphragm 30 is made thinner than the interior plate 1, the degree of freedom of the installation position of the exciter 10 in the ceiling of the automobile is increased.

  In this embodiment, the cut-out portion 29 is cut out from the entire interior plate 1 while leaving only the skin 4, but the interior plate 1 may be cut out leaving some.

  FIG. 7 shows an example in which the electrodynamic exciter 10 in the embodiment described with reference to FIGS. The piezoelectric element 40 is configured to vibrate in accordance with an electric signal by applying an electric signal to the two lead wires 42 connected thereto. In this embodiment, a coupler member 50 having a screw portion 51 at the center is attached to one surface of the piezoelectric element 40, and the coupler member 50 may be attached to the screw portion 32 of the bracket 3 described above. A screw that is screwed into the screw portion 32 of the bracket 3 is formed on the inner peripheral portion of the screw portion 51.

  FIG. 8 shows an example in which the electrodynamic exciter 10 according to the embodiment described with reference to FIGS. 4 to 6 is configured by a thin exciter 41 already proposed by the present inventors. FIG. 8 is an exploded view showing the structure of the exciter 41 in an exploded manner. The exciter 41 of this embodiment includes a flat yoke plate 21, a plurality of permanent magnets 22 disposed on the yoke plate 21, a leaf spring 23 that is an elastic body provided around the yoke plate 21, and , And a plate-like coupler member 24 elastically supported by the leaf spring 23.

  The yoke plate 21 is made of a magnetic material and has a rectangular shape (in this embodiment, a square), and a plurality of permanent magnets 22 on the yoke plate 21 are spaced apart from each other by a predetermined distance, and are opposite in polarity to the adjacent permanent magnets 22. It is arranged to become. That is, one permanent magnet 22 of this embodiment has an N pole on the top surface side and an S pole on the yoke plate side, and a permanent magnet adjacent thereto has an S pole on the top surface side and an N pole on the yoke plate side. The permanent magnet 22 has a rectangular cross section perpendicular to the magnetization direction, and in this embodiment, a square, and the side surfaces of the adjacent permanent magnets 22 are parallel to each other. For this reason, the magnetic field lines coming out of the N pole of the permanent magnet go to the S pole of the adjacent permanent magnet 22, so that a parallel magnetic field is generated between the two permanent magnets 22. The permanent magnets 22 of this embodiment are regularly arranged in the vertical direction and three in the horizontal direction, but the number of permanent magnets 22 is not particularly limited, and the number can be increased or decreased as necessary. it can.

  A leaf spring 23 attached to a position indicated by a two-dot chain line around the yoke plate 21 includes a frame-like base portion 23b fixed to the yoke plate 21 and an arm extending from the base portion 23b along the periphery of the yoke plate 21. Part 23a. In this embodiment, the arm portion 23a extends from the four corners of the base portion 23b in the direction of the four corners adjacent to the base portion 23b substantially in parallel. And the screw hole 23c is provided in the front-end | tip part of the arm part 23a.

  On the other hand, the flat coupler member 24 is formed of a resin plate. And the screw hole 24c is provided in the part of the four corners of the coupler member 24 corresponding to the screw hole 23c of this arm part 23a. Therefore, the coupler member 24 is attached to the leaf spring 23 via the screw 25 inserted through the screw hole 23c of the arm portion 23a from the yoke plate 21 side and the hollow sleeve 26 through which the screw 25 is inserted. Further, the coupler member 24 is provided with a mounting protrusion 24T having a mounting hole 24H at the center thereof, and a female screw that is screwed into the screw portion 32 of the bracket 3 is provided on the inner peripheral portion of the mounting hole 24H. ing. The mounting hole 24H is not a through hole.

  On the back side of the coupler member 24, as shown in FIG. 9A, coils are arranged at positions facing the respective permanent magnets 22. Each coil 27 is connected in series so that the inner winding start point is connected to the outer winding end point of the other coil 27. The winding start point of the first coil 27 s is connected to the + terminal of the terminal plate 28, and the winding end point of the last coil 27 e is connected to the − terminal of the terminal plate 28. In this way, when current flows from the winding start point of the first coil 27s toward the winding end point of the last coil 27e, currents in the same direction flow between the sides of the adjacent coils 27. The connection of the coil 27 in FIG. 9 is an example, and the connection between the coils 27 is not limited to this example. The terminal plate 28 is generally provided on the bottom side of the yoke plate 21 and is connected to both ends of the coil 27 of the coupler member 24 using tinsel wires.

  FIG. 9B shows a state in which the coupler member 24 is attached to the yoke plate 21 configured as shown in FIG. In this state, a predetermined distance is provided between the coupler member 24 and the top surface of the permanent magnet 22 by the hollow sleeve 26. When the permanent magnets 22 are arranged on the yoke plate 21 so that the polarities of adjacent permanent magnets 22 are reversed, the top surface side is transverse to the N-pole magnet 22 and the top surface side is transverse to the S-pole magnet 22. Generates a magnetic field. The coil 27 is arranged in the direction perpendicular to the magnetic field in the lateral magnetic field.

  The coils 27 provided on the back surface of the coupler member 24 at positions corresponding to the individual permanent magnets 22 have a rectangular spiral shape so as to have sides in a direction perpendicular to the magnetic force lines between the permanent magnets 22. Yes. And since the electric current of the same direction flows into the adjacent edge | side of an adjacent coil, when an electrical signal flows into the coil 27, the force of the same direction will generate | occur | produce in the adjacent coil 27, and a coupler member 24 vibrates.

  10A shows another configuration of the yoke plate 21 and the permanent magnet 22 shown in FIG. 8, and FIG. 10B shows the assembly of the exciter 44 using the yoke plate 21 shown in FIG. 10A. FIG. The exciter 44 of this embodiment differs from the exciter 41 of the embodiment shown in FIGS. 8, 9A and 9B only in the structure of the yoke plate 21 and the connection of the coils arranged on the back surface of the coupler member 24. It is. Therefore, in the exciter 44 of this embodiment, the same components as those of the exciter 41 of the above-described embodiment will be described with the same reference numerals.

  In the exciter 44 of this embodiment, the permanent magnets 22 on the yoke plate 21 are all arranged in the same direction, and in this embodiment, the S poles of all the permanent magnets 22 are arranged in the yoke plate direction. A portion around the permanent magnet 22 bulges to the permanent magnet 22 side by substantially the same height as the permanent magnet 22 to form a bulging portion 21a. The bulging portion 21a has a lattice shape, and each permanent magnet 22 is surrounded by the bulging portion 21a.

  In the exciter 44 of this embodiment, the lines of magnetic force do not flow from the permanent magnet 22 to the permanent magnet 22 but flow from the permanent magnet 22 toward the bulging portion 21 a of the yoke plate 21. The coil 27 is arranged in the direction perpendicular to the magnetic field in the lateral magnetic field. Also in this embodiment, the coil 27 is provided at a position corresponding to each of the permanent magnets 22 of the coupler member 24, and has a rectangular spiral shape so as to have a side perpendicular to the magnetic force line between the permanent magnets 22. is doing. Currents in different directions flow through adjacent sides of the adjacent coils 27.

  Therefore, as shown in FIG. 11, each coil 27 is connected in series with the inner winding start point being connected to the outer winding end point of the other coil 27 so that the winding direction is the same. The winding start point of the first coil 27s is connected to the + terminal of the terminal plate 28, and the winding end point of the last coil 27e is connected to the + terminal of the terminal plate 28. In this way, when current flows from the winding start point of the first coil 27s toward the winding end point of the last coil 27e, different directions of current flow between the sides of the adjacent coils 27. The connection of the coil 27 in FIG. 11 is an example, and the connection between the coils 27 is not limited to this example.

  Thus, by providing the bulging portion 21a surrounding the permanent magnet 22 in the yoke plate 21 and forming the top surface 21b to the same extent as the height of the permanent magnet 22, the exciter 44 of this embodiment is Since the generated magnetic flux density can be used effectively, the driving force of the coupler member 24 can be increased as compared with the exciter 41 of the embodiment shown in FIGS. Further, the speaker device using the vehicle interior plate of the present invention as a diaphragm can be applied not only to the ceiling portion of the vehicle but also to other parts of the vehicle, for example, the interior plate of a door.

1 shows the structure of a conventional exciter that is directly fixed to a diaphragm, (a) is a side view including a partial cross section of the exciter attached to the diaphragm, and (b) is an exciter of (a) from the back side. It is the bottom view seen. 1 shows a structure of a conventional exciter that is detachably fixed to a diaphragm via a bracket, (a) is a side view including a partial cross section of the exciter attached to the diaphragm, and (b) is a diagram of (a). It is a perspective view of an exciter and a bracket. It is a figure explaining the problem of the conventional exciter shown in FIG. (A) is a perspective view which shows another Example of the speaker apparatus which uses the ceiling base material of the motor vehicle of this invention as a diaphragm, (b) is an exciter fixed to the ceiling base material with the bracket shown to (a). It is sectional drawing which shows a state. 4A is a cross-sectional view of a ceiling portion showing a modification of the coupler member shown in FIGS. 4A and 4B, and FIG. 4B is a ceiling portion showing an embodiment in which the coupler member of FIG. 4A is supported by a damper. FIG. (A) shows another Example which attaches the exciter of this invention to a ceiling base material, (b) is sectional drawing which shows the state in which the exciter shown to (a) was attached to the ceiling base material. . It is an assembly perspective view which shows the example in which the exciter of this invention was comprised with the piezoelectric element. It is an assembly perspective view which shows another structure of the exciter of this invention. (A) is a wiring diagram which shows the connection of the coil arrange | positioned at the back surface of the coupler member shown by FIG. 8, (b) is a fragmentary sectional view after the assembly of the exciter shown by FIG. (A) is a perspective view which shows another structure of the yoke plate and magnet shown by FIG. 8, (b) is a fragmentary sectional view after the assembly of the exciter using the yoke plate of (a). It is a figure which shows the connection of the coil arrange | positioned at the back surface of a coupler member in case the arrangement | positioning of a permanent magnet is a state shown by Fig.10 (a), (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Interior plate 3 Bracket 4 Skin 5,6 Mold 7 Mounting screw 8 Roof board 9 Damper 10 Exciter 11 Outer yoke 12 Permanent magnet 16 Coupler member 17 Leaf spring 18 Screw 19 Inner thread part 20 Hole part 21 York plate 22 Permanent magnet 23 Leaf spring 24 Coupler member 27 Coil 31 Flange part 32 Screw part 40 Piezoelectric element 41, 44 Exciter 46, 50 Coupler member of the present invention

Claims (8)

An exciter that generates vibration by the input of an electrical signal;
A coupler member that transmits vibration of the exciter to the diaphragm;
The coupler member includes a vibration input unit that is connected to a vibration generating unit of the exciter, a vibration output unit that transmits the vibration to the diaphragm, and an arm unit that connects the vibration input unit and the vibration output unit. And
A speaker device that vibrates the diaphragm at a position away from a vibration output portion of the exciter by inputting an electrical signal to the exciter. An interior board formed in the vehicle compartment;
A bracket provided on the interior plate;
An exciter comprising a coupler member coupled to the bracket;
The coupler member connects a vibration input unit that is connected to a vibration generation unit of the exciter that generates vibration by inputting an electric signal, a vibration output unit that is attached to the bracket, and the vibration input unit and the vibration output unit. It consists of an arm part and
A speaker device, wherein an electrical signal is input to the exciter to vibrate the interior plate at a position distant from the interior plate directly below the exciter.   The speaker device according to claim 2, wherein the vibration input portion of the coupler member is supported on the interior plate by a damper. The exciter includes a magnetic circuit composed of a permanent magnet and a yoke plate, a spring member that supports the coupler member with respect to the magnetic circuit, and a voice coil that vibrates the coupler member by inputting the electric signal. the speaker device according to any one of claims 1 to 3, characterized in that the exciter made. The exciter is a piezoelectric exciter comprising a piezoelectric element, a lead wire that vibrates the piezoelectric element by inputting the electrical signal, and a coupler member attached to the piezoelectric element. 4. The speaker device according to any one of 1 to 3 . The exciter includes a yoke plate, a plurality of permanent magnets arranged on the yoke plate so as to be opposite to each other in polarity, and the permanent magnet at a position facing the yoke plate. A coupler member which is disposed at a predetermined distance from the top surface of the first plate and can be attached with a diaphragm on a surface opposite to the yoke plate, and an elastic body which is provided around the yoke plate and elastically supports the coupler member. And a coil that is provided at a position corresponding to each of the permanent magnets of the coupler member and is wound in one plane so as to have a side in a direction perpendicular to the magnetic field lines between the permanent magnets. wherein the coils are all the preceding claims, characterized in that the exciter arrangement being connected so that the current in the same direction on sides of adjacent coils flows of 3 The speaker device according to item 1. The exciter includes a yoke plate, a plurality of permanent magnets arranged on the yoke plate with the same polarity, and the permanent magnets around the permanent magnets so as to surround the permanent magnets. A magnetic circuit having a bulging portion bulged to the same height as that of the yoke plate and a position facing the yoke plate at a predetermined distance from the top surface of the permanent magnet, A coupler member to which a diaphragm can be attached to the opposite surface, an elastic body provided around the yoke plate and elastically supporting the coupler member, and a position of the coupler member corresponding to each of the permanent magnets Each coil is wound in one plane so as to have a side perpendicular to the line of magnetic force between the permanent magnets, and each coil has the same side as the adjacent coil. The speaker device according to any one of claims 1 to 3, characterized in that the exciter arrangement are connected to different directions of current flows. The speaker device using the interior plate according to claim 2 or 3 , wherein the interior plate is made of a foam member.

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