JP2007158752A - Speaker unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker unit with excellent acoustic characteristics which can be used for various kinds of video display devices and does not affect a video display part with an installation place of the speaker unit. <P>SOLUTION: The speaker unit 1,000 has a function of a stand for mounting a video display device 2,000 on a table or on a floor and a speaker function for outputting sound accompanying the video display of the video display device. The speaker unit 1,000 is provided with a super magnetostriction actuator for supplying a magnetic field corresponding to the sound signals to a super magnetostriction element that receives the mass of the video display device and generating displacement corresponding to the magnetic field, and a leg part with a mass distribution function of supplying the prescribed ratio of the mass of the video display device to the super magnetostriction actuator and receiving the remaining part. The super magnetostriction actuator vibrates the table or the floor according to the sound signals. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a speaker device having a function as a stand of a video display device and a function as a speaker that vibrates the outside by displacement of a giant magnetostrictive element.

  A magnetostriction phenomenon is known as a phenomenon in which the shape of a substance changes when a magnetic field is applied. In recent years, giant magnetostrictive materials that undergo a dimensional change of 1000 ppm or more when a magnetic field is applied have been developed.

Moreover, this giant magnetostrictive material has a large generated stress, which is 400 kgf / mm ² or more. Furthermore, this giant magnetostrictive material is capable of high-speed response, and some of the dimensions change in less than 1 microsecond.

  Attempts have been made to use this type of giant magnetostrictive material as a rod-like giant magnetostrictive element, to use a dimensional change as an actuator, and to use an actuator using this magnetostrictive element as a driving source of a speaker.

In addition, as what uses the giant magnetostrictive element which made such a giant magnetostrictive material rod shape for a speaker, what was described in the following patent document 1 exists, for example.
Japanese Patent Laid-Open No. 10-145892 (first page, FIG. 1)

  The speaker device described in Patent Document 1 described above is configured to operate as a speaker by vibrating a window glass surface, a wall surface, a picture or a photo hung on the wall as a diaphragm. In addition, since a wall surface, a picture, a photograph, etc. are members which are comparatively easy to vibrate, it is easy to use as a diaphragm.

  However, if such a speaker device is placed on the floor surface and the floor surface is used as a diaphragm, or placed on a relatively strong table and the table surface is used as a diaphragm, the floor surface When the table surface is solid and has a large area, the displacement of the giant magnetostrictive element is used to vibrate the speaker device itself, which causes a problem that a sufficient volume cannot be obtained as a speaker. . In connection with this, there also arises a problem that the speaker device cannot output high-quality and high-fidelity sound.

  By the way, in recent years, a large number of thin and large-screen video display devices such as liquid crystal display devices and plasma display devices have been sold. In such a video display device, there is a problem that there is almost no area for arranging speakers because most of the housing is used as a display surface for video display when viewed from the front. In addition, as is conventionally known, a loudspeaker requires a large diaphragm to produce low sounds, but there is a problem that such a space does not exist.

  The present invention has been made in order to solve the above-described problems, and can be used for various video display devices, and has good acoustic characteristics without affecting the video display unit with respect to the installation location. An object is to provide a speaker device.

The present invention for solving the above problems is as described below.
(1) The invention according to claim 1 is a speaker having a stand function for placing the video display device on a table or a floor, and a speaker function for performing audio output accompanying video display of the video display device. A magnetostrictive actuator that applies a magnetic field according to the audio signal to a giant magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field; and a predetermined mass of the video display device A leg portion having a mass distribution function for giving a proportion to the giant magnetostrictive actuator and receiving the remaining portion, and the giant magnetostrictive actuator vibrates the table or the floor in accordance with the audio signal. This is a characteristic speaker device.

  (2) The invention according to claim 2 is a speaker having a stand function for placing the video display device on a table or a floor, and a speaker function for performing audio output accompanying video display of the video display device. A magnetostrictive actuator that applies a magnetic field according to the audio signal to a giant magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field; and a predetermined mass of the video display device A leg portion having a mass distribution function for giving a proportion to the giant magnetostrictive actuator and receiving the remaining portion, and a shelf plate of the stand in contact with the giant magnetostrictive actuator, wherein the giant magnetostrictive actuator The speaker device is characterized in that the shelf board is vibrated accordingly.

  (3) A third aspect of the present invention is a speaker having a stand function for placing the video display device on a table or a floor, and a speaker function for outputting audio accompanying video display of the video display device. A super magnetostrictive actuator that applies a magnetic field according to the audio signal to a super magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field, the super magnetostrictive actuator comprising: A plurality of the magnetostrictive actuators are arranged and distributed at a predetermined ratio of the mass of the video display device, and the respective magnetostrictive actuators act as legs and vibrate the table or the floor according to the audio signal. This is a speaker device.

  (4) The invention described in claim 4 is a speaker having a stand function for placing the video display device on a table or a floor, and a speaker function for outputting audio accompanying video display of the video display device. A super magnetostrictive actuator that applies a magnetic field according to the audio signal to a super magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field; and a stand that is in contact with the super magnetostrictive actuator. A plurality of the giant magnetostrictive actuators are arranged, and each giant magnetostrictive actuator acts as a leg while distributing at a predetermined ratio of the mass of the video display device, and according to the audio signal. The speaker device is characterized in that the shelf plate is vibrated.

  (5) The invention according to claim 5 is characterized in that the giant magnetostrictive actuator has a bottomed and covered cylindrical shape and constitutes a magnetic path, one end is fixed to the lid portion of the yoke, and the other end is a free end. A giant magnetostrictive element configured to be arranged in a cylindrical direction of the yoke and generating a displacement according to a change in the magnetic field, and a magnetic field corresponding to a signal supplied from outside disposed around the giant magnetostrictive element in the yoke And the other end penetrating the central hole at the bottom of the yoke are arranged so as to transmit the displacement of the giant magnetostrictive element to an external object. 2. A vibration rod having a flange portion in an intermediate portion, and a rubber elastic body disposed between the flange portion provided on the vibration rod and a bottom portion of the yoke. Or any one of claims 4 to 5. A speaker device.

According to the present invention, the following effects can be obtained.
(1) In the first aspect of the invention, when the video display device is placed on the table or the floor, a predetermined proportion of the mass of the video display device is given to the giant magnetostrictive actuator and the remaining portion is received by the legs. The super magnetostrictive actuator generates a displacement corresponding to the magnetic field by applying a magnetic field corresponding to the audio signal to the giant magnetostrictive element that receives the mass of the video display device, and the super magnetostrictive actuator generates a table according to the audio signal. Or the floor is vibrated.

  As a result, the magnetostrictive actuator can be used as a stand of various video display devices, and the giant magnetostrictive actuator is arranged near the leg portion of the stand. Since the floor is vibrated, a speaker device having good acoustic characteristics can be realized.

  (2) In the invention according to claim 2, when the video display device is placed on the table or the floor, a predetermined proportion of the mass of the video display device is given to the giant magnetostrictive actuator and the rest is received by the legs. In this way, the super magnetostrictive actuator receives the mass of the image display device and applies a magnetic field corresponding to the audio signal to generate a displacement corresponding to the magnetic field from the super magnetostrictive actuator. Vibrate the plate.

  As a result, it can be used as a stand for various video display devices, and the giant magnetostrictive actuator is disposed near the leg of the stand, so that the giant magnetostrictive actuator can be installed on the stand without affecting the video display portion. Since the shelf board is vibrated, a speaker device having good acoustic characteristics can be realized.

  (3) In the invention described in claim 3, when the video display device is placed on the table or the floor, it is applied to the plurality of giant magnetostrictive actuators at a predetermined ratio of the mass of the video display device. The magnetostrictive actuator acts as a leg part of the stand, and a magnetostrictive actuator that generates a displacement corresponding to the magnetic field by applying a magnetic field corresponding to the audio signal to the giant magnetostrictive element receiving the mass of the video display device. Vibrates the table or floor according to the audio signal.

  As a result, it can be used as a stand for various types of video display devices, and a plurality of giant magnetostrictive actuators are also used as a stand. Since the floor is vibrated, a speaker device having good acoustic characteristics can be realized.

  (4) In the invention according to claim 4, when the video display device is placed on the table or the floor, it is applied to the plurality of giant magnetostrictive actuators at a predetermined ratio of the mass of the video display device. The magnetostrictive actuator acts as a leg part of the stand, and a magnetostrictive actuator that generates a displacement corresponding to the magnetic field by applying a magnetic field corresponding to the audio signal to the giant magnetostrictive element receiving the mass of the video display device. Vibrates the shelf in response to the audio signal.

  As a result, it can be used as a stand for various types of video display devices, and a plurality of giant magnetostrictive actuators are also used as a stand, so that the giant magnetostrictive actuator can be installed on the stand without affecting the video display unit at the installation location. Since the shelf board is vibrated, a speaker device having good acoustic characteristics can be realized.

  (5) In the invention described in claim 5, in any one of the above (1) to (4), the giant magnetostrictive actuator has a bottomed and covered cylinder shape, and one end is fixed to the lid portion of the yoke constituting the magnetic path. The giant magnetostrictive element is arranged with the other end being a free end. A coil for generating a magnetic field corresponding to a signal is disposed around the giant magnetostrictive element in the yoke. And it arrange | positions so that the displacement of a giant magnetostrictive element may be transmitted to an external object through the vibration rod which has a collar part in the intermediate part. Here, the displacement of the giant magnetostrictive element is effectively transmitted to the external object by the mass of the video display device. Thereby, the external object vibrates due to the displacement of the giant magnetostrictive element according to the signal supplied to the coil. Here, a rubber elastic body is sandwiched between the flange provided on the vibration rod and the bottom of the yoke, and the damping force is not added to the vibration caused by the displacement of the giant magnetostrictive element. To quickly converge. As a result, it can be used as a stand for various types of video display devices, and a plurality of giant magnetostrictive actuators are also used as a stand, so that the giant magnetostrictive actuator can be installed on the stand without affecting the video display unit at the installation location. Since the shelf board is vibrated, a speaker device having good acoustic characteristics can be realized.

The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below in detail with reference to the drawings.
<First embodiment>
FIG. 1 is an explanatory view showing a speaker device (stand and speaker device) 1000 according to the first embodiment of the present invention. Here, FIG. 1A is an explanatory diagram showing a state of being attached to the video display device (display device) 2000 and performing a function as a stand and a function as a speaker. FIG. 1B is a cross-sectional view showing a cross-sectional configuration of a giant magnetostrictive actuator 1100 that is a main component of the stand and speaker device 1000 of the first embodiment.

  First, in FIG. 1A, 2000 is a display device having a thin and large display screen 2100 such as a liquid crystal display device or a plasma display device in recent years. Here, when viewed from the front, in order to enlarge the display screen 2100 as much as possible, there is not enough space in the front to arrange the speakers.

  Reference numeral 1000 denotes a stand-and-speaker device having a function as a stand for placing the display device 2000 on the table or the floor and a speaker function for outputting sound accompanying video display of the display device 2000. The stand / speaker device 1000 is a speaker device in claims.

  The stand / speaker device 1000 includes a display mounting portion 1010 as a top plate, a base portion 1020 as a floor plate, a giant magnetostrictive actuator 1100 that generates vibration according to an audio signal, and legs 1200 and 1300 having a mass distribution function. And is configured.

  Reference numeral 1010 denotes a top plate of the stand and speaker device 1000, which is a display device mounting portion to which the display device 2000 is mounted. For example, the display device 2000 is placed on the table or the floor by the stand and speaker device 1000 by fitting the convex portion on the display mounting portion 1010 side with the concave portion of the display device 2000.

  Reference numeral 1100 denotes a giant magnetostrictive actuator that applies a magnetic field corresponding to an audio signal to a giant magnetostrictive element that receives the mass of the display device 2000 and generates a displacement corresponding to the magnetic field. It is a component. The internal configuration of the giant magnetostrictive actuator 1100 will be described in detail with reference to FIG.

  Reference numeral 1200 denotes a leg portion having a mass distribution function for giving a predetermined proportion of the mass of the display device 2000 to the giant magnetostrictive actuator 1100 and receiving the remaining portion. Reference numeral 1300 denotes a leg portion having a mass distribution function for giving a predetermined proportion of the mass of the display device 2000 to the giant magnetostrictive actuator 1100 and receiving the remaining portion.

  Here, the leg portion 1200 and the leg portion 1300 have the same configuration, and FIG. 1A shows an example of the internal configuration of the leg portion 1300. Here, the leg portion 1300 includes a column 1310, a cylinder 1330 having an inner diameter substantially equal to the outer diameter of the column 1310, and a buffer member 1330 configured by various elastic bodies such as a spring and rubber that receives the column 1310 in the cylinder 1320. And is composed of. Further, the vertical direction of the column and the cylinder may be reversed. In addition to a column and a cylinder, a prism and a square tube may be used.

  The giant magnetostrictive actuator 1100 is vibration generating means that vibrates a table or a floor according to an audio signal while receiving the mass of the display device 2000 as shown in FIG.

  In the giant magnetostrictive actuator 1100 shown in FIG. 1B, reference numeral 1110 denotes a giant magnetostrictive element in which a giant magnetostrictive material that generates a magnetostriction phenomenon that changes the shape of a substance when a magnetic field is applied is formed in a rod shape. Here, the giant magnetostrictive element 1100 is divided into a first giant magnetostrictive element 1111 close to the lid side of the yoke and a second giant magnetostrictive element 1112 close to the bottom side of the yoke.

  Reference numeral 1120 (1121, 1122, 1123) denotes a bias magnet for applying a bias magnetic field in the axial direction of the giant magnetostrictive element 1110. Here, 1121 is a first bias magnet disposed between one end of the giant magnetostrictive element 1111 and the lid side of the yoke, and 1122 is a first bias magnet disposed between one end of the giant magnetostrictive element 1112 and the vibrating rod. Reference numeral 1123 denotes a third bias magnet disposed between the giant magnetostrictive element 1111 and the giant magnetostrictive element 1112. The first bias magnet 1111, the second bias magnet 1112, and the third bias magnet 1113 are magnetic fields in the axial direction of the giant magnetostrictive element and in the same direction with respect to the giant magnetostrictive element 1111 and the giant magnetostrictive element 1112. Is generated.

  A coil 1130 is disposed around the giant magnetostrictive element 1110 and generates a magnetic field according to a signal supplied from the outside via the wire 1132, and is wound around a coil bobbin 1132 arranged around the giant magnetostrictive element 1110. It is a solenoid coil.

  Reference numeral 1140 denotes a yoke having a bottomed and covered cylinder and constituting a magnetic path, and is composed of an upper yoke 1141 composed of an upper portion of the tubular portion and a lid portion, and a bottom yoke 1142 composed of the lower portion and the bottom portion of the tubular portion. A center hole is provided near the center of the bottom of the bottom yoke 1142, and a vibration rod described later passes therethrough. In addition, the upper yoke 1141 and the bottom yoke 1142 are provided with screw threads that fit into each other at portions that are in contact with each other. A rod-shaped giant magnetostrictive element 1110 is disposed near the central axis of the cylindrical yoke 1140, and a coil 1130 is wound around the rod-shaped giant magnetostrictive element 1110. The yoke 1140, the giant magnetostrictive element 1110, and a vibration rod 1151 described later constitute a magnetic closed circuit.

  1151 is arranged so that one end is in contact with the free end of the giant magnetostrictive element 1110 (1111) and the other end penetrating the central hole at the bottom of the bottom yoke 1142 transmits the displacement of the giant magnetostrictive element 1110 to an external object. Vibration rod. The vibrating rod 1151 is configured to have a flange portion 1151a at the intermediate portion. Further, the other end side (external object side) of the vibration rod 1151 has a contact 1152 as a vibration contact plate having an area larger than the cross-sectional area of the vibration rod 1151, and the vibration rod 1151 is connected via the contact 1152. The displacement of the giant magnetostrictive element 1110 is transmitted to an external object such as a base 1020 or a floor.

  Reference numeral 1160 denotes a damper made of a rubber elastic body disposed between a flange portion 1151 a provided on the vibration rod 1151 and a bottom portion of the bottom yoke 1142. When the upper yoke 1141 and the bottom yoke 1142 are screwed in, the damper 1160 is in a contracted state.

  1170 is provided as a sliding means for reducing the frictional resistance with the center hole of the bottom yoke 1142 when the vibrating rod penetrating the center hole at the bottom of the bottom yoke 1142 vibrates according to the displacement of the giant magnetostrictive element 1110. O ring. The O-ring 1170 can be changed to a bearing or the like.

  Here, the relationship between the magnetic field H applied to the giant magnetostrictive element 1110 and the shape change (magnetostriction) ΔI / I is as shown in FIG. The characteristic example shown here has the characteristic that the magnetostriction increases as the magnetic field H is increased in both positive and negative directions.

  Therefore, by applying a bias magnetic field and changing the magnetic field according to the signal around the bias magnetic field (FIG. 2B), vibration according to the signal can be obtained (FIG. 2C). ). In this case, it is possible to obtain a faithful vibration corresponding to a change in the magnetic field by using a region with good linearity. Therefore, it is desirable to select a bias magnetic field by the bias magnets 111 to 113 at the center of such a region with good linearity.

  According to the configuration of the stand / speaker device 1000 as described above, the display device 2000 is connected to the display mounting portion 1010 in a state where the end of the vibration rod (contact 1152) of the giant magnetostrictive actuator 1100 is placed on the base portion 1020. By applying a load to the giant magnetostrictive element 1110 via the yoke 1140, the displacement of the giant magnetostrictive element 1110 is effectively transmitted to an external object.

  Thereby, the base part 1020 vibrates due to the displacement of the giant magnetostrictive element 1110 according to the audio signal supplied to the coil 130. Moreover, the floor which the base part 1020 contacts also vibrates. Here, a damper 1160 made of a rubber elastic body is sandwiched between the flange 1151a provided on the vibration rod 1151 and the bottom of the yoke 1140, and extra vibration is caused by the displacement of the giant magnetostrictive element 1110. It quickly converges with damping force without adding vibration.

Moreover, when the inventor conducted a separate experiment and measured the frequency characteristics, the following results were obtained.
When a coil spring is used as the damper 1160, a severe peak occurs at around 2 kHz, and the low range gradually decreases, flat frequency characteristics cannot be obtained, and desirable characteristics as a magnetostrictive speaker can be obtained. could not.

  On the other hand, when a low elastic rubber having a hardness of 32 °, a butyl rubber having a hardness of 65 °, and a silicon rubber having a hardness of 50 ° are used as the damper 1160, the peak as in the case of the coil spring does not occur, and These characteristics were improved, flat frequency characteristics were obtained, and desirable characteristics as a magnetostrictive speaker were obtained. For this reason, the signal waveform supplied to the coil 130 and the vibration waveform are substantially matched over a wide frequency range, the level difference due to the frequency is small, and it is possible to obtain a faithful vibration corresponding to the magnetic field change. .

  As a result, when the giant magnetostrictive actuator 1100 of the stand / speaker device 1000 is used by being placed on a platform 1020 on a horizontal surface such as a floor or a table, the elastic elastic body is used as the damper 1160, so that acoustic characteristics can be improved. Good operation can be realized.

  In the giant magnetostrictive actuator 1100 of the stand / speaker device 1000, the displacement of the giant magnetostrictive element 1110 is transmitted to an external object via a contact 1152 as a vibrating contact plate having an area larger than the cross-sectional area of the vibrating rod 1151. . As a result, when the giant magnetostrictive actuator 1100 of the stand / speaker apparatus 1000 is placed on a horizontal plane and vertical vibration is used, the displacement of the giant magnetostrictive element 1110 can be reliably and faithfully transmitted to an external object. Therefore, an operation with good acoustic characteristics can be realized.

  Further, in the giant magnetostrictive actuator 1100 of the stand / speaker apparatus 1000, the contact 1152 as the vibration contact plate has a frequency component (wide / narrow frequency characteristics) and amplitude (large / small volume) of vibration to be transmitted. It is preferable to be composed of different materials and different areas. And it is preferable that the other end of the vibration rod 1151 can be attached by screwing or the like. In this way, when the giant magnetostrictive actuator 1100 is placed on a horizontal plane and vertical vibration is used, the displacement of the giant magnetostrictive element is reliably and faithfully transmitted to an external object according to the application and purpose of use. Thus, an operation with good acoustic characteristics can be realized. Further, the material and area of the contact 1152 as the vibration contact plate may be changed according to the material, hardness, vibration absorbability, etc. of the floor or table as the external object.

  Further, in the speaker device 1000 / giant magnetostrictive actuator 1100, the giant magnetostrictive element 110 is divided into a first giant magnetostrictive element 1111 and a second giant magnetostrictive element 1112 and sandwiched between three bias magnets, thereby superposing an even magnetic field. This can be applied to the magnetostrictive element 1110, and an operation with good acoustic characteristics can be realized.

  Further, in the stand and speaker device 1000, the mass of the display device 2000 is distributed between the giant magnetostrictive actuator 1100, the leg portion 1200, and the leg portion 1300, and by appropriately changing the constant of the buffer member 1330 (1230), Can be applied to the giant magnetostrictive actuator 1100.

  In addition, by matching the impedance characteristics of the coil 130 with the characteristics of a general speaker (about 4Ω to 16Ω), it becomes possible to handle connections with various audio devices in the same way as a general speaker. This eliminates the need for special equipment and wiring, and improves usability.

  In addition, the super magnetostrictive actuator 1100 of this embodiment is supplied with a center (C) audio signal during multi-channel reproduction such as 5.1 channel or 6.1 channel, so that the sound image localization is stabilized, and the center speaker. There is no need to worry about the location.

<Second embodiment>
FIG. 3 is a cross-sectional view showing a cross-sectional configuration of a stand and speaker device 1000 according to the second embodiment of the present invention. The stand / speaker device 1000 of the second embodiment of FIG. 3 basically has a cross-sectional configuration similar to that of the speaker device of the first embodiment shown in FIG. For this reason, the duplicate description is abbreviate | omitted by attaching | subjecting the same number to the same thing.

  Here, a hole is provided in the base portion 1020 ′ at the contact 1152 portion of the giant magnetostrictive actuator 1100. The contact 1152 is in direct contact with the floor of the installation location. For this reason, a floor having a larger area can be used as a diaphragm of the speaker. In the case of soft materials such as tatami mats and carpets, this second embodiment is not suitable, so the first embodiment and the second embodiment are properly used in view of the floor material and vibration characteristics at the installation location. It is desirable.

<Third embodiment>
FIG. 4 is a cross-sectional view showing a cross-sectional configuration of the stand and speaker device 1000 according to the third embodiment of the present invention. The stand / speaker device 1000 of the third embodiment shown in FIG. 4 basically has a cross-sectional configuration similar to that of the speaker device of the first embodiment shown in FIG. For this reason, the duplicate description is abbreviate | omitted by attaching | subjecting the same number to the same thing.

  Here, instead of using the legs 1200 and 1300 in the first embodiment, a plurality of giant magnetostrictive actuators 1100 are also used as legs, and the mass of the display device 2000 is mutually shared by the plurality of giant magnetostrictive actuators 1100. It is configured to distribute.

  In this case, the same audio signal may be supplied to a plurality of giant magnetostrictive actuators 1100, or the giant magnetostrictive actuator 1100C to which the center (C) audio signal is supplied and the left (L) audio signal are supplied. The giant magnetostrictive actuator 1100L and the giant magnetostrictive actuator 1100R to which a right (R) audio signal is supplied can be used separately for the center and the left and right three channels in multi-channel reproduction.

  Also, the giant magnetostrictive actuator 1100L to which the left (L) audio signal is supplied and the giant magnetostrictive actuator 1100R to which the right (R) audio signal is supplied can be used separately as two channels. .

Also in the case of the third embodiment, it is also possible to directly vibrate the floor by applying the second embodiment described above.
<Fourth embodiment>
As an improvement of the third embodiment described above, another giant magnetostrictive actuator 1100 (not shown) can be arranged behind the giant magnetostrictive actuator 1100C to supply a sound signal for bass (0.1). It is. By doing so, it is possible to effectively use the space without being troubled with the installation location of the super woofer during multi-channel playback.

Also in the case of the fourth embodiment, it is also possible to directly vibrate the floor by applying the second embodiment described above.
<Fifth embodiment>
As an improvement of the first to fourth embodiments described above, an amplifier that amplifies an audio signal can be incorporated in the giant magnetostrictive actuator 1100. In this case, if the input level of the amplifier is set to be the same as that of a normal line input, it can be used in the same manner as other devices.

It is a block diagram which shows the structure of the stand and speaker apparatus of 1st embodiment of this invention. It is a characteristic view which shows the characteristic of the giant magnetostrictive element of the stand and speaker apparatus of 1st embodiment of this invention. It is a block diagram which shows the structure of the stand and speaker apparatus of 2nd embodiment of this invention. It is a block diagram which shows the structure of the stand and speaker apparatus of 3rd embodiment of this invention.

Explanation of symbols

1000 Stand and speaker device (speaker device)
1010 Top plate 1020 Base 1100 Giant magnetostrictive actuator 1200 Leg 1300 Leg

Claims (5)

A speaker device comprising a stand function for placing the video display device on a table or a floor, and a speaker function for performing audio output accompanying video display of the video display device,
A giant magnetostrictive actuator that applies a magnetic field according to the audio signal to the giant magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field;
A leg portion having a mass distribution function for giving a predetermined proportion of the mass of the video display device to the giant magnetostrictive actuator and receiving the remaining portion;
The giant magnetostrictive actuator vibrates the table or the floor according to the audio signal.
A speaker device characterized by that. A speaker device comprising a stand function for placing the video display device on a table or a floor, and a speaker function for performing audio output accompanying video display of the video display device,
A giant magnetostrictive actuator that applies a magnetic field according to the audio signal to the giant magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field;
A leg portion having a mass distribution function of giving a predetermined proportion of the mass of the video display device to the giant magnetostrictive actuator and receiving the remaining portion;
A shelf plate of the stand in contact with the giant magnetostrictive actuator,
The giant magnetostrictive actuator vibrates the shelf board according to the audio signal.
A speaker device characterized by that. A speaker device comprising a stand function for placing the video display device on a table or a floor, and a speaker function for performing audio output accompanying video display of the video display device,
A giant magnetostrictive actuator that applies a magnetic field according to the audio signal to the giant magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field;
A plurality of the giant magnetostrictive actuators are arranged and distributed at a predetermined ratio of the mass of the video display device, and each giant magnetostrictive actuator acts as a leg and vibrates the table or the floor according to the audio signal. ,
A speaker device characterized by that. A speaker device comprising a stand function for placing the video display device on a table or a floor, and a speaker function for performing audio output accompanying video display of the video display device,
A giant magnetostrictive actuator that applies a magnetic field according to the audio signal to the giant magnetostrictive element that receives the mass of the video display device and generates a displacement according to the magnetic field;
A shelf plate of the stand in contact with the giant magnetostrictive actuator,
A plurality of the giant magnetostrictive actuators are arranged and distributed at a predetermined ratio of the mass of the video display device, and the giant magnetostrictive actuators act as legs and vibrate the shelf plate according to the audio signal.
A speaker device characterized by that. The giant magnetostrictive actuator is
A yoke having a bottomed and covered cylinder and constituting a magnetic path;
A giant magnetostrictive element having one end fixed to the lid of the yoke and the other end configured as a free end, arranged in a cylindrical direction of the yoke, and generating a displacement in accordance with a change in a magnetic field;
A coil disposed around the giant magnetostrictive element in the yoke and generating a magnetic field according to a signal supplied from the outside;
One end is in contact with the free end of the giant magnetostrictive element, and the other end penetrating the central hole at the bottom of the yoke is arranged to transmit the displacement of the giant magnetostrictive element to an external object, and a flange is provided in the middle part. A vibrating rod having,
A rubber elastic body disposed between the flange provided on the vibrating rod and the bottom of the yoke,
The speaker device according to any one of claims 1 to 4, wherein the speaker device is characterized.

Images