JP2005160051A - Apparatus for directly vibrating board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for directly vibrating a board treated for dustproofing and heat dissipation improving an air compression rate using vibration to a spatial area in the apparatus and discharges heat using a generated air convection. <P>SOLUTION: The apparatus for directly vibrating a board that is directly attached to a panel, comprises: a tray-like outer yoke 81 having a side wall portion and a bottom portion; a permanent magnet 82 that is mounted in the bottom portion; an inner yoke 83 that is provided while being spaced from the side wall portion; a coil that is wound around a tubular bobbin 84 and inserted into the space; a coupler member 85 that fixes the bobbin and is mounted on a surface of the panel; and an elastic body 88 that elastically supports the outer yoke and the coupler member. When a driving signal is supplied to the coil, the panel is vibrated as a diaphragm. A closing member 9 is provided for forming a closed space between the outer yoke and the coupler member, thereby improving the air compression rate as measures for dustproofing. A through hole H is formed to be a passage for generating the air convection in accordance with vibration between the inside of the closed space and an outer space. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a plate body direct drive vibration device that is directly attached to a plate body and vibrates the plate body, and in particular, the vibration device is attached to the plate body and driven as a speaker device, and the heat generated by the drive is efficient. TECHNICAL FIELD The present invention relates to a plate body direct drive vibration device that is radiated with heat and is dust-proofed.

  2. Description of the Related Art Conventionally, in electronic devices such as a stereo playback device, a personal computer, and a mobile phone, a speaker device has been used to output sound information from various media. In this speaker device, a diaphragm that emits sound is attached to a vibration device that is supplied with a drive signal that outputs sound. The diaphragm usually has a horn shape specially designed for the speaker device. For example, a voice coil of the vibration device is fixed to the diaphragm, and the voice coil vibrates in a magnetic circuit. Sound is output.

  Such a speaker device is also used for acoustic reproduction of music and voice in a vehicle, for example, a passenger compartment of a passenger car. The speaker device is embedded in, for example, a door for a front seat, or further placed on a rear tray, and a plurality of speaker devices are mounted on at least one of the front seat and the rear seat. It is common to be mounted and arranged correspondingly.

  However, in addition to arranging the speaker device related to sound reproduction in the front seat door or on the rear tray, it has been proposed to arrange the speaker device on the ceiling plate in the vehicle interior (for example, Patent Document 1). See).

  FIG. 10 shows a state in which the proposed in-vehicle speaker device is incorporated in a passenger car by a partial longitudinal sectional view of the passenger car. In the passenger compartment of the passenger car 1, a front seat 3 including a driver's seat and a rear seat 4 are provided. A front speaker 6 is embedded in the door with respect to the front seat 3, and a rear speaker 7 is placed on the rear tray of the rear seat 4. The ceiling portion of the passenger car 1 includes an outer plate 2 and a ceiling plate 5, and a vibration device 8 described later is attached near the center of the ceiling plate 5 to constitute a speaker device. Further, the vibration device 8 may be attached between the outer plate 2 and the ceiling plate 5, but the same effect can be obtained when the vibration device 8 is attached to the interior side of the ceiling plate 5 as indicated by a broken line in FIG. 10. Is obtained.

  When mounting a normal speaker device in a vehicle interior, there is a restriction on the mounting position of the speaker device, and in order to cope with the fact that a speaker device having a very large aperture cannot be used, the above-described vibration device is mounted on the vehicle. In the speaker device for use, instead of the above-described conventional speaker device having a large aperture, the vibration device is directly attached to the ceiling plate to form a speaker having the ceiling plate as the vibration plate.

  In this way, various plate body direct drive vibration devices that can be employed as in-vehicle speaker devices have been proposed (see, for example, Patent Document 2). A specific configuration example of the proposed vibration device will be described with reference to FIGS. 11 and 12.

  In FIG. 11, a state in which the vibration device 8 is directly attached to, for example, the interior plate 5 of the automobile is shown, and the left half from the center is shown in a longitudinal section. In the vibration device 8, a dish-shaped outer yoke 81 having a concave portion in which a side wall portion and a bottom portion are continuously formed, a disk-shaped permanent magnet 82 attached to the bottom portion, and a top of the permanent magnet 82. A disk-shaped inner yoke that is slightly larger than the permanent magnet 82 and has a gap between the inner surface of the side wall portion of the outer yoke 81 and the outer peripheral surface of the inner yoke 83 to form a magnetic circuit. ing.

  The vibration device 8 includes a coupler member 85 that is attached to the surface of the interior plate 5. The coupler member 85 includes a magnetic circuit component including an outer yoke 81, a permanent magnet 82, and an inner yoke 83. Are provided with a plurality of elastic body support members 86-1 to 86-3 integrally formed with the coupler member 85.

  FIG. 12 is a plan view of the vibration device 8 as viewed from the outer yoke 81 side. The section taken along line XX shown here corresponds to the longitudinal section shown in FIG. In the vibration device 8 illustrated in FIG. 12, the three elastic body support members 86-1 to 86-3 are provided, but the number is not limited to these three. FIG. 11 shows elastic bodies 88-1 to 88-3 for elastically supporting the outer yoke 81 and the coupler member 85. The elastic bodies 88-1 to 88-3 are formed of the outer yoke. 81 is an elastic piece integrally formed with an elastic body attaching member 87 fixed to the end portion of the side wall portion 81, and each tip portion is screwed to a corresponding elastic body supporting member 86-1 to 86-3. Has been.

  As shown in FIG. 11, a cylindrical bobbin 84 around which a coil is wound is fixed to the coupler member 85. The coil wound around the bobbin 84 is indicated by a black portion in the drawing. The coil is inserted into a gap formed between the inner surface of the side wall portion of the outer yoke 81 and the outer peripheral surface of the inner yoke 83. When a drive signal is supplied to this coil, vibration is generated in accordance with the frequency of the drive signal by the action of the formed magnetic circuit. This vibration is transmitted to the interior board 5 via the coupler member 85.

  Since the interior plate 5 is usually formed of a material such as urethane or foam PP, the interior plate 5 itself can serve as a diaphragm. Therefore, when a drive signal is given to the coil, the interior plate 5 is vibrated through the coupler member 85 connected to the bobbin 84 around which the coil is wound, and sound corresponding to the frequency of the signal is generated. it can. Thus, by using the interior plate 5 as a diaphragm, a favorable sound field can be formed. Moreover, although the vibration apparatus 8 shown in FIG. 11 is attached to the lower surface of the interior board 5, as the vibration apparatus 8 is shown in FIG. 10, between the ceiling board 2 and the interior board 5 of a motor vehicle, Even if it is attached to the upper surface of the interior plate 5, the same effect can be obtained as a speaker device using a plate body direct drive vibration device.

Japanese Utility Model Publication No. 6-45865 JP 2003-143690 A

  In the plate body direct drive vibration device described above, even if the vibration device is attached to the interior plate 5, as shown in FIG. Since a certain height is provided, the outer yoke 81 and the coupler member 85 are arranged apart from each other, and a part of the cylindrical side wall related to the bobbin 84 can be seen from the side of the vibration device 8. ing. Therefore, the space region formed inside the bobbin 84 is a gap between the outer peripheral surface of the inner yoke 83 and the inner surface of the bobbin 84, and further between the outer peripheral surface of the bobbin 84 and the inner peripheral surface of the side wall of the outer yoke. It communicates with the outer space through a gap.

  In order to operate the plate body direct drive vibration device having such a configuration as a speaker device, when a drive signal is supplied to the coil, the coil generates heat. Even in a normal voice coil type speaker device, as in the case of a plate body direct drive vibration device, there is a possibility that a spatial region exists inside the voice coil and heat is generated in the spatial region due to heat generation of the voice coil. There is. However, in the case of this voice coil type speaker device, since the vibration width of the voice coil is large, heat over the space region can be exhausted by air convection, and the parts including the voice coil do not become high temperature.

  However, in the case of a plate body direct drive vibration device, the space area in the bobbin is in communication with the outer space, and the vibration width is relatively small due to the structure of vibration drive. The air convection generated in the region is weak, and it is not possible to exhaust the heat that has been burned. Therefore, there is a problem that the apparatus itself becomes high temperature, and measures such as measures for preventing deformation of the coupler member due to heat and the use of a heat-resistant material for the interior plate are necessary, resulting in an increase in cost.

  In addition, when the speaker device is configured by directly attaching the plate body direct drive vibration device as shown in FIG. 11 to an automobile interior plate, for example, as described above, the cylindrical shape related to the bobbin 84 is used. A part of the side wall of the bobbin is visible, and a space region formed inside the bobbin communicates with the outer space. Therefore, there is a problem that dust, dust, and the like enter from the outer space into the space area. Furthermore, dust, dust, etc. are accumulated in the gap between the outer peripheral surface of the inner yoke 83 and the inner surface of the bobbin 84 or in the gap between the outer peripheral surface of the bobbin 84 and the inner peripheral surface of the side wall of the outer yoke. End up. As a result of these gaps being clogged with dust, dust, etc., air convection due to vibration generated when the coil is driven is weakened or prevented, so that heat generated is inhibited, and abnormal noise is generated due to voice coil rubbing. There is a problem that leads to disconnection.

  Therefore, in view of these problems, the present invention improves the air compressibility due to vibrations in the space region in the apparatus and promotes air convection, thereby facilitating the release of generated heat and dust inside the apparatus. An object of the present invention is to provide a plate body direct drive vibration device that is provided with a dust-proof measure to prevent intrusion of dust and the like.

  In order to achieve the above object, according to the present invention, in a plate body direct drive vibration device that directly vibrates a plate body by supplying a drive signal to a coil, an outer yoke composed of a side wall portion and a bottom portion, and the bottom portion An attached permanent magnet, an inner yoke placed on the permanent magnet and spaced from the side wall, a coil wound around a cylindrical bobbin and inserted into the gap, and the bobbin A coupler member that is fixed to the plate body and vibrates when the drive signal is supplied to the coil to vibrate the plate body, and an elastic body that elastically supports the outer yoke and the coupler member A closing member provided between the outer yoke and the outer periphery of the coil, and an outer space, and a communication path between at least the space formed by the closing member and the outer space. With the door.

  According to the present invention, in the plate body direct drive vibration device that directly vibrates the plate body by supplying a drive signal to the coil, an outer yoke composed of a side wall portion and a bottom portion, and a permanent magnet attached to the bottom portion, An inner yoke placed on the permanent magnet and spaced from the side wall, a coil wound around a cylindrical bobbin and inserted into the gap, and fixing the bobbin and the coil A coupler member that vibrates when supplied with a drive signal, a bracket member that is engaged with the coupler member and is fixed to the plate member that vibrates due to the vibration of the coupler member, the outer yoke, and the coupler member An elastic body that elastically supports the outer yoke, a gap between the outer yoke and the outer periphery of the coil, and a closing member provided between the outer space and at least the closing member And a passage connecting the space and the outer space formed.

  The closing member has one end fixed to the outer yoke or the elastic body, and the other end fixed to the outer periphery of the bobbin, or one end fixed to the outer yoke or the elastic body. The other end is fixed to the coupler member.

  Further, the closing member has a flexible main body having a ring shape, and the main body has an end face part joined to the outer yoke or the elastic body, and an other end face part joined to the coupler member. It is integrally formed.

  The passage is provided in at least one of the side wall part or the bottom part, provided in the bobbin, provided through the inner yoke, the permanent magnet, and the outer yoke, or provided in the closing member. It is done.

  Further, the passage is provided at a position other than the position where the coupler member is attached to the plate body, or when the bracket member is provided, the passage is provided at a position other than the position where the coupler member is attached to the plate body.

  In the passage, the opening on the space side is wider than the opening on the outer space side.

  The coupler member has an engagement receiving portion that opens into the space that engages with the engagement portion of the bracket member, and the engagement portion of the bracket member protrudes into the space and the engagement receiving portion. To be engaged.

  The plate body direct drive vibration device of the present invention forms a speaker device in which the plate body serves as a vibration plate and emits sound when the drive signal is supplied to the coil.

  In the plate body direct drive vibration device of the present invention, the plate body is attached to an interior plate of a vehicle.

  As described above, according to the present invention, in a plate body direct drive vibration device that uses a plate body as a diaphragm, a closing member that forms a closed space is provided between the outer yoke and the coupler member constituting the vibration device. Furthermore, since a passage for generating air convection in accordance with the vibration of the vibration device is formed between the closed space and the outer space, the closing member prevents dust and dust from entering the device. In addition to providing a countermeasure, the passage to the outer space is provided in the closed space formed by the closing member, so that the air compression ratio due to vibration of the formed closed space is improved, and air convection is generated efficiently and forced air cooling is performed. And can prevent the apparatus from becoming high temperature. Therefore, the cost of the plate body direct drive vibration device can be reduced.

  In the present invention, in order to form a closed space in the vibration device, the closing member is joined between the entire circumference of the end of the side wall portion of the outer yoke and the outer periphery of the coupler member. A flexible main body having a shape, and an end face portion joined to the entire circumference of the end portion of the side wall portion and an other end face portion joined to the outer periphery of the coupler member are integrally formed with the main body. Thus, when assembling the vibration device, the components constituting the vibration device can be sequentially incorporated, workability can be improved, and the sealing property of the enclosed space to be formed is also improved.

  Next, an embodiment of a plate body direct drive vibration device according to the present invention will be described in detail with reference to FIGS.

  First, with reference to a configuration example of the plate body direct drive vibration device according to the present embodiment shown in FIG. 1, the principle that air convection in the device can be efficiently generated by the driven vibration will be described. The configuration of the plate body direct drive vibration device shown in FIG. 1 is based on the same configuration as that of the plate body direct drive vibration device according to the conventional proposal shown in FIGS. In FIG. 1, the same parts as those in the plate body direct drive vibration device shown in FIGS. 11 and 12 are denoted by the same reference numerals.

  In the plate body direct drive vibration device proposed in the past, in the case of the plate body direct drive vibration device, the space area in the bobbin communicates with the outer space over the entire circumference through the gap between the bobbin and the outer yoke or the inner yoke. Therefore, when the driven amplitude is small, effective vibrations cannot be generated due to the vibration. For this reason, it was impossible to exhaust the sizzling heat.

  Therefore, in the plate body direct drive vibration device of the present embodiment, paying attention to the fact that effective air convection can be generated by improving the air compressibility due to vibration with respect to the space region formed in the device, An enclosed space is positively formed in the interior, and a passage that restricts the entry and exit of air from the enclosed space due to vibration is provided to generate effective air convection and forcibly air-cool the inside of the apparatus. I did it. By forming a closed space in the apparatus, a gap between the bobbin and the outer yoke or the inner yoke is taken into the closed space, which also serves as a dust-proof measure.

  FIG. 1 shows how the closed space is formed in the plate body direct drive vibration device. In the conventionally proposed plate body direct drive vibration device, the space region formed inside the bobbin 84 communicates with the outer space through the gap between the bobbin and the outer yoke or the inner yoke. The closing member 9 is provided between the elastic body attaching member 87 and the outer wall surface of the bobbin 84, and the end portions of the members are joined over the entire circumference. A state of joining the bobbin 84 to the outer wall surface of the closing member 9 is shown by a broken line in FIG.

  The outer yoke 81 and the coupler member 85 are coupled by the elastic bodies 88-1 to 88-3, and when a drive signal is supplied to the coil wound around the bobbin 84, the outer yoke 81 and the coupler member 85 are relative to each other. Therefore, when the blocking member 9 is provided between the elastic body attaching member 87 and the outer wall surface of the bobbin 84, the flexibility does not hinder the vibrations caused by the elastic bodies 88-1 to 88-3. It shall be of a shape or material that has For example, it is possible to use an annular member formed by impregnating a woven fabric with a resin and solidifying it, and forming it into a shape with a curved cross section as shown in the figure, and it is assumed that there is no air permeability.

  If the closed space can be formed in the vibration device 8, the closing member 9 may not be provided in the shape shown in FIG. 1. In FIG. 1, the closing member 9 is joined to the elastic body attaching member 87 and the outer wall of the bobbin 84, but the vibration device 8 may be joined to the upper end of the side wall portion of the outer yoke 81 and the coupler member 85. A closed space can be formed inside. Even in this case, the closing member 9 itself is made of a flexible shape or material and has no air permeability. In consideration of the improvement of the air compressibility due to vibration, it is preferable that the closing member is arranged so that the closed space to be formed is as small as possible.

  Next, in order to replace the air staying in the enclosed space formed in the apparatus with the air in the outer space, a passage through which the air enters and exits the enclosed space and the outer space according to the vibration of the apparatus is provided. We decided to prepare for. When a drive signal is supplied to the coil and the outer yoke 81 vibrates in the direction of the coupler member 85, the closed space in the apparatus is compressed according to the amplitude thereof, and the compressed air is provided by providing a passage. Becomes easy to be discharged into the outer space. Therefore, effective air convection is generated in the enclosed space, and heat generated in the apparatus is easily radiated.

  As described above, by forming a closed space in the device and providing a passage for connecting the space and the outer space, the vibration width is different from the case of the conventional voice coil type speaker device due to the structure of the device. Even if it is relatively small, the air compression rate due to the vibration of the device is improved, and the outlet of the air from the closed space to the outer space is limited by the passage. Air convection is generated, and the air convection plays a role of forced air cooling in the enclosed space, so that heat generated in the apparatus is efficiently radiated. Furthermore, forming a closed space between the outer yoke and the coupler member is also a measure against dust in the apparatus.

  Next, various specific examples will be described with reference to FIGS. 2 to 9 as to how to form a passage between the closed space and the outer space formed in the apparatus by the closing member. The plate body direct drive vibration device shown in each of FIGS. 2 to 9 is shown in an enlarged view of only a portion relating to the longitudinal section of the left half of the plate body direct drive vibration device 8 shown in FIG. The same parts are denoted by the same reference numerals.

  FIG. 2 shows a specific example 1 in which a through hole is provided in the outer yoke 81 constituting the plate body direct drive vibration device as the above-described passage. In the first specific example, a through hole H <b> 1 is provided at the bottom of the outer yoke 81 and located on the outer periphery of the permanent magnet 82. The number of the through holes H1 is selected so as to generate an optimum air convection according to the air compression ratio with respect to the size of the closed space in the apparatus. If the closed space is large, the number of through holes is small. If the closed space is formed to be small, for example, it can be provided at a plurality of four or more locations. In the case of a plurality of through holes, they can be arranged along the periphery of the bottom of the outer yoke 81.

  2 shows an example in which the through hole H1 is provided in the bottom portion of the outer yoke 81, the role of a passage between the closed space and the outer space is provided in the side wall portion of the outer yoke 81. Can be fulfilled. Even in this case, the method of determining the number of through holes is the same as that at the bottom of the outer yoke 81.

  In the first specific example, by providing the through hole H1, the air in the space area inside the bobbin 84 related to the closed space and the space area surrounded by the closing member 9 and the bobbin 84 are caused by the vibration of the apparatus. By being compressed, air convection indicated by arrows in FIG. 2 is generated, and air heated from the through hole H1 is discharged to the outer space. Next, the air in the outer space is sucked from the through hole H1 by the vibration in the opposite direction of the apparatus, so that forced air cooling in the apparatus is realized.

  Next, a modification of the first specific example shown in FIG. 2 is shown in FIG. In the first specific example, the through hole H1 is provided in the peripheral edge of the bottom portion of the outer yoke 81. However, in the space region inside the bobbin 84 and the space region formed by the closing member 9 and the outer periphery of the bobbin 84, the amount of air in them For example, when the space area inside the bobbin 84 is larger, the vibration width of the apparatus is the same for both, so the degree of air compression to each area will be different, and the bobbin The air compressibility with respect to the space area inside 84 falls.

  In such a case, the bobbin 84 itself may be provided with a through hole H2 that communicates with the space region inside the bobbin 84 and the space region surrounded by the closing member 9 and the bobbin 84. The number of the through holes H2 can be appropriately selected at one place or more. This through hole H2 has a role of adjusting the air compression rate when there is a difference in the air compression rate between the two divided space regions in the closed space formed in the device. The rate can be improved, and effective air convection is easily generated.

  Note that the through hole H2 is provided below the joint line between the closing member 9 and the bobbin 84, which is indicated by a broken line in FIG. 3, in order to adjust the pressure between the two divided space regions in the closed space. ing. When this through-hole H2 is provided above the joint line, the bobbin 84 in the upper part of the joint line faces the outer space, so the through-hole H2 has a space area inside the bobbin 84 and the outer space. In this case, the through hole H2 can provide the same effect as the through hole H1.

  On the other hand, each of the through holes H1 provided in the outer yoke 81 in the specific example 1 shown in FIG. 2 or the modified example of the specific example 1 shown in FIG. 3 has both an opening to the closed space and an outside space. An opening is a hole having the same size and the same diameter. Therefore, in the specific example 2 of the passage shown in FIG. 4, depending on the size of the opening of the through hole H1, dust or dust may be sucked from the outer space. The provided through-hole H3 is provided in the outer yoke 81.

  In the second specific example shown in FIG. 4, in the through hole H <b> 3 provided in the outer yoke 81, the area of the opening facing the outer space is made smaller than the opening facing the closed space. Therefore, as shown by the arrow in FIG. 4, when the enclosed space is compressed by the vibration of the apparatus, effective air convection can be generated smoothly. On the contrary, the air in the enclosed space can be generated by the vibration of the apparatus. When the air is sucked in, the opening of the through hole is narrowed, so that it is possible to suppress the sucking of dust, dust and the like from the outer space, which is a measure against dust.

  In the specific examples 1 and 2 so far, the through-hole as the passage is provided in the peripheral portion of the outer yoke. However, in FIG. 5, the bottom portion of the outer yoke, that is, the inner side of the peripheral portion of the outer yoke is shown. In addition, a through-hole as a passage is provided. In the case of the specific examples 1 and 2, the air in the space area inside the bobbin 84 becomes air convection passing through the gap between the inner yoke 83 and the bobbin 84 and is discharged to the outer space through the through hole H1. However, in the third specific example shown in FIG. 5, the space area inside the bobbin 84 and the outer space are directly communicated with each other through the three layers of the outer yoke 81, the permanent magnet 82 and the inner yoke 83. A through hole H4 is provided.

  In the case of the specific example 3, the air in the space region formed by the closing member 9 and the outer periphery of the bobbin 84 is caused by the vibration of the apparatus, and the inner peripheral surface of the side wall portion of the outer yoke 81 and the coil of the bobbin 84 as shown by the arrows in FIG. It moves to the space area inside the bobbin 84 via the gap between the outer peripheral wall surface and the gap between the coil inner peripheral surface of the bobbin 84 and the outer peripheral surface of the inner yoke 83. Therefore, the number and thickness of the through holes H4 are adjusted so that effective air convection is generated. When the through hole H4 is thick, it is sufficient that one through hole is provided at the center, and when a plurality of through holes H4 are provided, the center surrounds the center as shown in FIG. Are arranged as follows.

  In the specific examples 1 to 3 described so far, the through hole H1 or H4 is provided in association with the outer yoke 81. However, as in the specific example 4 shown in FIG. 6, the blocking member 9 itself penetrates as a passage. A hole can also be provided. A through hole H <b> 5 is provided in the closing member 9 that directly communicates a space region between the closing member 9 and the outer peripheral surface of the bobbin 84 and the outer space.

  In the case of the specific example 4, the air in the space region inside the bobbin 84 is separated from the gap between the coil inner peripheral surface of the bobbin 84 and the outer peripheral surface of the inner yoke 83, the inner peripheral surface of the side wall portion of the outer yoke 81, and the coil of the bobbin 84. Since it moves to the outer space by the air convection passing through the gap with the outer peripheral surface, in order to improve the heat radiation efficiency, the wall surface of the bobbin 84 is also shown in FIG. 3 as shown in FIG. Provided through hole H2.

  Next, FIG. 7 shows a specific example 5 in which the above-described passage is provided in the coupler member 85. As shown in FIG. 7, the air region formed inside the bobbin 84 is also defined on the surface of the coupler member 85 opposite to the surface in contact with the interior plate 5. By providing the through hole H6, the air region inside the bobbin 84 communicates with the outer space by the through hole H6. The method of determining the number of through holes H6 is the same as in the case of the specific example 3 shown in FIG.

  By the way, in the plate body direct drive vibration device of the present embodiment described so far, it is assumed that the coupler member is directly attached to the surface of the interior plate. However, in reality, when the coupler member is directly attached to the interior plate, the plate body direct drive vibration device itself is fixedly attached, and serviceability such as replacement and removal of the plate body direct drive vibration device is obtained. There is a problem of lowering. Therefore, in order to cope with this problem, the plate body direct drive vibration device can be detachably attached. A bracket member having an engaging portion is fixed to the interior plate, and the bracket member is engaged with the coupler member. An engagement receiving portion that can be engaged with the joint portion is provided. Since the bracket member is usually made of resin, application of the present embodiment is useful for preventing thermal deformation.

  FIG. 8 shows a specific example 6 of the plate body direct drive vibration device of the present embodiment in which the coupler member is attached to the interior plate via the bracket member. The basic configuration of the plate body direct drive vibration device is the same as that of other specific examples, and the same reference numerals are given to the same portions. However, the difference is that the engagement receiving portion 85-1 is formed on the coupler member 85. For example, the engagement receiving portion 85-1 is formed with a screw portion that is screwed with the engagement portion 10-1 that is integrally formed with the bracket member 10. FIG. 8 shows a state where the plate body direct drive vibration device is attached to the interior board 5 via the bracket member 10.

  Here, in the plate body direct drive vibration device of the type attached to the interior plate via the bracket member 10, the space area inside the bobbin 84 formed in the device is the inner peripheral surface of the bobbin 84, the inner yoke 83. The upper surface, the inner surface of the coupler member 85, and the end surface of the engaging portion 10-1 of the bracket member 10 are defined. Therefore, if a through-hole is provided in the bracket member 10, it is possible to connect the space area inside the bobbin 84 and the outer space.

  In Example 6 shown in FIG. 8, the concept of providing a passage that forms effective air convection is the same as that of Example 5 shown in FIG. 7, and instead of the through hole H6 provided in the coupler member 85, An L-shaped through hole H7 penetrating through the bracket member 10 can be provided. When the plate body direct drive vibration device is attached to the interior plate via the bracket member 10, it is not always necessary to provide the through hole H7, and the passage according to the other specific example described above. It is not necessary to provide the through hole H7 in the bracket member. Of course, the specific example 6 used in combination with other specific examples is effective for the generation of effective air convection.

  In Specific Example 6 shown in FIG. 8, it has been described that when a plate body direct drive vibration device is attached to a plate body using a bracket member, a through hole is provided in the bracket member to generate effective air convection. In addition, it will be described with reference to FIG. 9 that effective air convection can be generated by devising the shape of the bracket member by a method different from providing a through hole in the bracket member.

  The plate body direct drive vibration device shown in FIG. 9 is the same as the structure of the plate body direct drive vibration device of the first specific example shown in FIG. 2 except that the plate body direct drive vibration device is attached to the interior plate 5 via the bracket member 10. The same parts are denoted by the same reference numerals. In the specific example 7 shown in FIG. 9, the coupler member 85 is formed with an engagement receiving portion 85-1, and the engagement portion 10-2 formed integrally with the bracket member 10 is the engagement portion 85. The coupler member 85 is detachably attached to the bracket member 10 by engaging with, for example, a screw portion provided in -1.

  Here, when the engaging portion 10-2 of the bracket member 10 is engaged with and engaged with the engaging receiving portion 85-1 of the coupler member 85, the distal end portion of the engaging portion 10-2 is engaged with the engaging portion. The engaging portion 10-2 is designed to be longer than 85-1 so as to protrude into the space area inside the bobbin 84. Since the tip of the engaging portion 10-2 protrudes into the space area inside the bobbin 84, the volume occupied by the space area can be reduced, and the effect of further improving the air compressibility with respect to the amplitude width of the apparatus. I play. Therefore, even if the amplitude width of the apparatus is small, effective air convection is easily generated. In addition, although the case where the said bracket member is used for the specific example 1 was shown in FIG. 9, how to provide the through-hole by another specific example is also employable.

  As described above, in the plate body direct drive vibration device according to the present embodiment, a closed member is provided to form a closed space in the device, so that air compression can be achieved even for small amplitude vibration due to the device structure. The air is effective to move the heat generated inside the apparatus to the external space by providing a passage that communicates the closed space and the external space after improving the air compression rate. By generating convection, it was possible to forcibly cool the device.

  In addition, although the specific examples 1 to 6 were individually shown and described as to how to provide the passage, two or more of the various specific examples can be used in combination, and the opening area of the through hole serving as the passage can also be adopted. Are appropriately adjusted. Further, in specific examples 1 to 7, the case where the plate body direct drive vibration device or the bracket member is attached to the interior plate of the automobile is shown, but the plate body direct drive vibration device of the present embodiment is applied to the interior plate of the vehicle. The present invention is not limited to the case of attachment, and is also applicable to the case of attachment to a plate having an appropriate area and capable of propagating vibrations of the vibration device.

  In the specific examples 1 to 7 according to the first and second embodiments described above, the closing member 9 attached to the vibration device is between the elastic body attaching member 87 and the outer wall surface of the bobbin 84 as described above. When it is provided on the elastic body 88-1 to 88-3, the elastic body 88-1 to 88-3 has a flexible shape or material that does not hinder the vibration of the vibration body. For example, the woven fabric is impregnated with resin and solidified. As shown in the figure, it is an annular member formed in a shape with a curved cross section, and has no air permeability. The closing member 9 is bonded to the outer wall of the bobbin 84 and the upper end of the side wall of the elastic body attaching member 87 or the outer yoke 81 by using an adhesive to form a closing space in the vibration device 8. ing.

  By the way, the closing member 9 made of a woven cloth impregnated with resin and solidified is joined to the outer wall of the bobbin 84 and the upper end of the side wall of the elastic body attaching member 87 or the outer yoke 81 by an adhesive. The assembly work was complicated. On the other hand, there is a need to further improve the heat resistance and durability of the closing member itself in order to maintain the sealing property of the closing space in the vibration device, even if the adhesion between the closing member and the object to be joined is good. .

  Here, in the closing member 9 shown in the specific examples 1 to 7, it is possible to use fluorine rubber, silicon rubber or the like excellent in heat resistance and durability instead of using a woven cloth impregnated with resin and solidified. It is. The closing member 9 shown in the specific examples 1 to 8 is joined to the bobbin 84 and the elastic body attaching member 87 or the upper end of the side wall of the outer yoke 81 with an adhesive.

  Accordingly, a vibration device using a closing member that improves the workability of device assembly and has improved heat resistance and durability is shown as a specific example 8 according to the third embodiment in FIGS. 10 and 11. . FIG. 10A shows a state in which a closing member 91 having a shape different from that of the closing member 9 used in Examples 1 to 7 is attached in the vibration device 8. FIG. 10B is a bird's-eye view of the closing member 91 before being incorporated in the vibration device 8. FIG. 11 is an enlarged view of only the portion relating to the vertical section of the left half of the vibration device 8 shown in FIG. Here, in FIG. 10A and FIG. 11, the same code | symbol is attached | subjected to the same part as the vibration apparatus 8 shown by FIG. 1 thru | or FIG.

  Details of the closing member 91 attached to the vibration device 8 according to the eighth specific example are shown in FIG. The blocking member 91 is integrally formed of flexible fluorine rubber or silicon rubber in consideration of heat resistance and durability. The shape of the member body is an O-ring as a whole, and an end surface portion 92 joined to the outer periphery of the coupler member 85 is provided on one end periphery of the member body, and the other end periphery of the member body is provided on the other end periphery. Is provided with an end surface portion 93 that is joined to the entire circumference of the elastic body attaching member 87 or the entire circumference of the end portion of the side wall portion of the outer yoke 81. Since the shape of the closing member is an O-ring, when assembling the vibration device, the components constituting the vibration device can be sequentially stacked and assembled, improving the assembly workability of the vibration device. To do.

  The member main body includes an end surface portion 92 and a bulging portion 94 integrally formed with the end surface portion 93. By the presence of the bulging portion 94, in addition to the flexibility due to the material of the member main body, it is possible to provide flexibility that does not hinder the vibration of the vibrating body supported by the elastic bodies 88-1 to 88-3. it can. Then, the height of the bulging portion 94 is adjusted to an appropriate size so that the distance between the end surface portion 92 and the end surface portion 93 is the side wall of the coupler member 85, the elastic body mounting member 87, or the outer yoke 81. It should be slightly larger than the distance from the end of the part.

  When the closing member 91 is designed in this way, when assembling the vibration device, each end surface portion of the closing member 91 is connected to the coupler member 85 and the elastic body attaching member 87 or the end of the side wall portion of the outer yoke 81. Pressed against the part. After the assembly of the vibration device is completed, the elasticity of the closing member 91 acts, and the end surface 92 adheres to the entire outer periphery of the coupler member 85, and the elastic body mounting member 87 of the end surface 93 or the outer yoke 81 The adhesion to the entire periphery of the end of the side wall can be improved. In attaching the closing member 91, the closing member 91 is fixed in the vibration device 8 using an adhesive.

  The vibration device of the eighth specific example illustrated in FIGS. 10A and 11 is a case where the closing member 91 is incorporated between the coupler member 85 and the elastic body attaching member 87. The shape is shown by a thick solid line. The way of heat radiation in the vibration device 8 of the illustrated specific example 8 is the same as that of the specific example 1, and the state is shown in FIG.

  In the eighth specific example, as the above-described passage, a through hole H1 is provided at a position located on the outer periphery of the permanent magnet 82 at the bottom of the outer yoke 81. The number of the through holes H1 is selected so as to generate an optimum air convection according to the air compression ratio with respect to the size of the closed space in the apparatus. If the closed space is large, the number of through holes is small. If the closed space is formed to be small, for example, it can be provided at a plurality of four or more locations. In the case of a plurality of through holes, they can be arranged along the periphery of the bottom of the outer yoke 81.

  Even if a closed space is formed in the device by the closing member 91 and the through hole H1 is provided as a passage connecting the space and the outer space, the vibration width is relatively small due to the structure of the device. The air compression rate due to the vibration of the device is improved, and the outlet of air from the closed space to the outer space is limited by the passage. As a result, as shown by arrows in FIG. 11, effective air convection accompanying the vibration of the apparatus is generated, and the air convection plays a role of forced air cooling in the enclosed space, and heat generated in the apparatus is efficiently generated. Heat is dissipated. Furthermore, forming a closed space between the outer yoke and the coupler member is also a measure against dust in the apparatus.

  The closing member 91 used in the specific example 8 according to the third embodiment described above is a substitute for the closing member 9 used in the vibration device 8 according to the specific examples 1 to 7 according to the first and second embodiments. In addition, the workability at the time of assembling the vibration device 8 according to each specific example can be improved, and the heat resistance and durability as the vibration device can be improved.

It is a figure explaining 1st Embodiment of the panel direct drive speaker apparatus by this invention. It is sectional drawing explaining the specific example 1 of the panel direct drive speaker apparatus which concerns on 1st Embodiment. It is sectional drawing explaining the modification of the specific example 1 of the panel direct drive speaker apparatus which concerns on 1st Embodiment. It is sectional drawing explaining the specific example 2 of the panel direct drive speaker apparatus which concerns on 1st Embodiment. It is sectional drawing explaining the specific example 3 of the panel direct drive speaker apparatus which concerns on 1st Embodiment. It is sectional drawing explaining the specific example 4 of the panel direct drive speaker apparatus which concerns on 1st Embodiment. It is sectional drawing explaining the example 5 of the panel direct drive speaker apparatus which concerns on 1st Embodiment. It is sectional drawing explaining the specific example 6 which concerns on 2nd Embodiment of the panel direct drive speaker apparatus by this invention. It is sectional drawing explaining the specific example 7 of the panel direct drive speaker apparatus which concerns on 2nd Embodiment. It is a figure explaining the example 8 which concerns on 3rd Embodiment of the vibration apparatus which vibrates the plate body by this invention directly. It is a partial expanded sectional view of the vibration apparatus in the specific example 8 shown by FIG. It is a figure explaining the state which attached the panel direct drive speaker apparatus by a prior art to the ceiling interior board of a vehicle. It is a figure explaining the specific structural example of a panel direct drive speaker apparatus. It is a figure explaining the state which looked at the panel direct drive speaker device shown in Drawing 13 from the lower part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Ceiling board 3 Front seat 4 Rear seat 5 Interior board 6 Front speaker 7 Rear speaker 8 Vibration apparatus 81 Outer yoke 82 Magnet 83 Inner yoke 84 Voice coil bobbin 85 Coupler member 86-1 to 86-3 Elastic body support member 87 Elastic body attaching member 88-1 to 88-3 Elastic body 9, 91 Closure member 92, 93 End face part 94 Swelling part 10 Bracket member H1-H7 Through-hole

Claims (15)

An outer yoke comprising a side wall and a bottom;
A permanent magnet attached to the bottom;
An inner yoke placed on the permanent magnet and provided with a gap from the side wall;
A coil wound around a cylindrical bobbin and inserted into the gap;
A coupler member that fixes the bobbin, is attached to a plate, and vibrates when the drive signal is supplied to the coil to vibrate the plate.
An elastic body that elastically supports the outer yoke and the coupler member;
A closing member provided between a gap between the outer yoke and the outer periphery of the coil, and an outer space;
The plate body direct drive vibration apparatus provided with the channel | path which connects at least the space formed of the said closure member, and external space. An outer yoke comprising a side wall and a bottom;
A permanent magnet attached to the bottom;
An inner yoke placed on the permanent magnet and provided with a gap from the side wall;
A coil wound around a cylindrical bobbin and inserted into the gap;
A coupler member that fixes the bobbin and vibrates when a drive signal is supplied to the coil;
A bracket member that engages with the coupler member and is fixed to the plate that vibrates due to vibration of the coupler member;
An elastic body that elastically supports the outer yoke and the coupler member;
A closing member provided between a gap between the outer yoke and the outer periphery of the coil, and an outer space;
The plate body direct drive vibration apparatus provided with the channel | path which connects at least the space formed of the said closure member, and external space.   The plate body direct drive vibration according to claim 1, wherein one end portion of the closing member is fixed to the outer yoke or the elastic body, and the other end portion is fixed to an outer periphery of the bobbin. apparatus.   3. The plate body direct drive vibration device according to claim 1, wherein the closing member has one end fixed to the outer yoke or the elastic body and the other end fixed to the coupler member. . The closure member has a flexible body having a ring shape,
The plate body according to claim 4, wherein an end surface portion joined to the outer yoke or the elastic body and an other end surface portion joined to the coupler member are integrally formed on the main body. Direct drive vibration device.   The plate body direct drive vibration device according to any one of claims 1 to 5, wherein the passage is provided in at least one of the side wall portion or the bottom portion.   The plate body direct drive vibration device according to claim 1, wherein the passage is provided in the bobbin.   The plate body direct drive vibration device according to any one of claims 1 to 7, wherein the passage is provided so as to penetrate the inner yoke, the permanent magnet, and the outer yoke.   The plate body direct drive vibration device according to any one of claims 1 to 8, wherein the passage is provided in the closing member.   The plate direct drive vibration device according to any one of claims 1 to 9, wherein the passage is provided at a position other than the position where the coupler member is attached to the plate.   The plate body direct drive vibration device according to claim 2, wherein the passage is provided at a position other than a position where the passage is attached to the plate body of the bracket member.   The plate body direct drive vibration device according to any one of claims 1 to 11, wherein the passage has a wider opening on the space side than an opening on the outer space side. The coupler member has an engagement receiving portion that opens in the space that engages with the engagement portion of the bracket member,
The plate body direct drive vibration device according to claim 2, wherein the engaging portion of the bracket member protrudes into the space and is engaged with the engaging receiving portion.   14. The speaker device according to claim 1, wherein the driving signal is supplied to the coil to form a speaker device in which the plate body serves as a diaphragm and emits sound. Plate body direct drive vibration device.   The plate body direct drive vibration device according to any one of claims 1 to 14, wherein the plate body is an interior plate of a vehicle.

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