JP2016058936A - Speaker device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker device in which oscillation distortion does not occur and thus sound volume can be secured even when strong vibration occurs from an oscillation device, so that clear sounds in a broad sound area can be output from the speaker device.SOLUTION: In a speaker device 1, a vibration device 3 is provided to a radiation plate formed of a full hard plate material. Vibration occurring at the vibration device is transmitted to the radiation plate 2, and radiated as sounds from the radiation plate. An end portion of a transmission rod 4 of the vibration device which comes into contact with the radiation plate and transmits the vibration of the vibration device to the radiation plate is formed like a convex curved surface. The speaker device is provided with urging means 5 for applying predetermined press force to the contact point of the contact portion between the transmission rod having the end portion shaped like the convex curved surface of the vibration device and the radiation plate, thereby bringing the transmission rod into contact with the radiation plate. The speaker device is provided with adjusting means for adjusting the urging force of the urging means.SELECTED DRAWING: Figure 1

Description

The present invention relates to a speaker device.

A speaker that is provided with a vibration device including an actuator on the back side of the radiation plate and transmits vibration generated from the vibration device to the radiation plate is proposed in Patent Document 1.

However, the speaker disclosed in Patent Document 1 simply inserts and abuts vibration generated from the vibration device into a coupling hole provided in the transmission member via a transmission rod provided in the vibration device. Since the device is not fixed, shaking is generated by strong vibration generated from the vibration device, and the vibration device moves like a pendulum by its own weight, and further repeats to contact the transmission rod and the transmission member. A large force is applied to the coupling holes of the portions to cause loosening, and a state in which the vibration generated from the vibration device cannot be sufficiently transmitted to the transmission member occurs. Also, when the radiation plate is used on a wall surface (vertical surface) or ceiling surface (opposite to the horizontal surface), it will hang down due to the weight of the vibration device, and on the wall surface (vertical surface), the transmission rod will be perpendicular to the radiation plate The transmission rod is refracted and comes into contact with the transmission member. When the transmission member is provided on the radiation plate, when vibration is transmitted in a state where the coupling hole is loosened, the entire radiation plate is caused by the state in which the vibration generated from the vibration device cannot be sufficiently transmitted to the transmission member. There is a problem in that the amount of transmitted vibration is reduced, the volume is lowered, and the sound quality tends to be lowered.

Japanese Patent No. 5457600

The present invention has been made in view of the above problems, for example, the contact portion does not loosen due to strong vibration generated from the vibration device, and the radiation plate is used for the wall surface (vertical surface), Even when used on a ceiling surface (opposite to a horizontal plane), the transmission rod of the vibration device can be brought into perpendicular contact with the radiation plate, and the vibration device is fixed to the radiation plate. It is an object of the present invention to provide a speaker device that can transmit vibrations generated from the radiating plate to a radiation plate, can secure a sound volume, and can produce a clear sound in a wide sound range.

The speaker device according to the present invention is a speaker device in which a vibration device is provided on a radiation plate made of a hard plate material, and vibration generated by the vibration device is transmitted to the radiation plate and radiated as sound from the radiation plate. The end of the transmission rod of the vibration device that contacts the radiation plate and transmits the vibration of the vibration device to the radiation plate is formed into a convex curved surface, and the end of the transmission rod of the vibration device is An urging means is provided to apply a predetermined pressing force to a contact point of a contact portion between the transmission rod and the radiation plate formed in a convex curved shape so as to contact the radiation plate. .
In the present invention, it is desirable that an adjusting means for adjusting the urging force of the urging means is provided.
In the present invention, the radiation plate is a flat plate made of any material of wood, wood material, bamboo, hard plastic, metal, glass, gypsum board, or any combination thereof, or the material. It is desirable that any one of the flat plates constituting a hollow panel using a radiating plate is used.
In the present invention, it is preferable that an end portion of the transmission rod of the vibration device is provided on an extension line of a drive shaft of an actuator constituting the vibration device.
In the present invention, the transmission rod is formed using wood, bamboo, metal, glass, or hard plastic, and is in contact with either the front surface or the back surface of the radiation plate. desirable.
In the present invention, by applying an arbitrary hard material to the surface of the radiation plate, the vibration generated by the vibration device is transmitted to the radiation plate and the sound quality radiated as sound from the radiation plate is changed. It is desirable to be able to do it.
In the present invention, it is desirable that the second radiation plate is formed by bringing the radiation plate into contact with a hard plate material larger than the radiation plate.
In the present invention, it is desirable that the second radiation plate is formed in an arbitrary shape with a hard plate material using a straight line or a curved line in the planar shape.
In the present invention, it is desirable that the second radiating plate is composed of any one of a wall surface, a ceiling surface, a floor surface, and a fixture.

The speaker device according to the present invention is a speaker device in which a vibration device is provided on a radiation plate made of a hard plate material, and vibration generated by the vibration device is transmitted to the radiation plate and radiated as sound from the radiation plate. The end of the transmission rod of the vibration device that contacts the radiation plate and transmits the vibration of the vibration device to the radiation plate is formed into a convex curved surface, and the end of the transmission rod of the vibration device is An urging means is provided to apply a predetermined pressing force to a contact point of a contact portion between the transmission rod and the radiation plate formed in a convex curved shape so as to contact the radiation plate. As a result, the contact part does not loosen even by strong vibrations generated by the vibration device, and the radiation plate is used for the wall surface (vertical surface) or the ceiling surface (the state opposite to the horizontal surface). Even if The transmission rod of the vibration device can be brought into perpendicular contact with the radiation plate, the vibration device is fixed to the radiation plate, the vibration generated from the vibration device can be transmitted to the radiation plate, and the biasing means is attached. Those provided with adjusting means for adjusting the force cause a problem that vibration generated from the vibration device cannot be transmitted to the radiation plate if the predetermined pressing force against the contact point of the contact portion is weak. If the force for pressing the transmission rod to the contact point of the abutting portion with the radiation plate is strong, a problem that weak vibrations are not transmitted occurs. However, these problems can be prevented, and the transmission of the vibration device By adjusting a predetermined pressing force of the rod against the contact point of the contact portion with the radiation plate, there is an effect that the vibration generated from the vibration device can be efficiently transmitted to the radiation plate and the sound volume can be secured.
Further, as described in claim 2, the apparatus provided with the adjusting means for adjusting the urging force of the urging means can transmit the vibration generated from the vibration device to the radiation plate in an optimum state. There is.
Further, as in claim 3, the radiation plate made of a hard plate material is made of wood, wood material, bamboo, hard plastic, metal, glass, gypsum board, or a flat plate made of any combination thereof. Or, one of the flat plates constituting the hollow panel using the above material is formed as a radiating plate, which is capable of producing high-frequency overtones and high-frequency components and is clear in a wide sound range. There is an effect that a sound can be emitted.
According to a fourth aspect of the present invention, the transmission rod provided on the extension line of the drive shaft of the actuator that constitutes the vibration device is configured to reduce the vibration generated from the vibration device between the transmission rod and the radiation plate. It is possible to efficiently transmit to the contact point of the contact portion, and there is an effect that a large sound is radiated from the radiation plate.
Further, as in claim 5, the transmission rod is made of wood, bamboo, metal, glass, or hard plastic, and is in contact with any one of the planes on the front and back sides of the radiation plate. Even if it is the weak vibration which generate | occur | produced from the said vibration apparatus, there exists an effect that it is efficiently transmitted to the said radiation plate.
In addition, as in claim 6, by applying an arbitrary hard material to the surface of the radiation plate, the vibration generated by the vibration device is transmitted to the radiation plate and is emitted as sound from the radiation plate. Is capable of obtaining a sound including higher harmonics and higher frequency components.
Further, as in claim 7, the second radiation plate formed by contacting the radiation plate with a hard plate material larger than the radiation plate has an effect that the sound radiation area can be increased.
Moreover, as for the said 2nd radiation | emission plate like Claim 8, when the planar shape was formed in arbitrary shapes with the hard board | plate material using a straight line or a curve, it is said that a favorite design and sound quality can be selected. effective.
In addition, as described in claim 9, the second radiating plate configured by any one of a wall surface, a ceiling surface, a floor surface, and a fixture has an effect of widening sound directivity. .

It is a perspective view which shows an example of embodiment of this invention. It is a schematic diagram explaining how vibration is transmitted, S indicates a sound radiation area, and Z indicates a radiation plate area used in the present invention. (A) is sectional drawing which shows a part of tree, (b) is a schematic diagram which shows an annual ring. It is a table | surface of the parameter | index of the tree classification hardness showing the hardness of the dried tree. It is the perspective view explaining the example of the radiation plate used for this invention. (A) is a product in which gypsum board is applied to wood and a hard material is adhered in a mosaic pattern. (B) is a material in which a hard thin plate is adhered to the surface of wood. And a hard material are laminated to form a single radiation plate. It is a top view of the vibration apparatus used for this invention. It is sectional drawing of the vibration apparatus used for this invention, (a) illustrates the state fixed to the radiation plate, (b) illustrates the urging means. It is an enlarged view of the contact part in which the edge part of the transmission rod of this invention was formed in the convex curve shape. It is a top view explaining the example of the biasing means of this invention. 10 is a cross-sectional view illustrating a problem of the speaker disclosed in Patent Document 1. FIG. It is sectional drawing of 2nd Embodiment by this invention. It is sectional drawing of 3rd Embodiment by this invention. It is sectional drawing of 4th Embodiment by this invention. It is a top view of the similar example of the radiation plate of 4th Embodiment by this invention.

  Hereinafter, modes for carrying out the present invention will be described.

  FIG. 1 is an example of the speaker device according to the first embodiment. The speaker device 1 includes a radiation plate 2, a vibration device 3, a transmission rod 4, and an urging means 5.

As the radiation plate 2, a flat plate made of a hard plate material is used in order to smoothly transmit vibration to the entire radiation plate 2. Examples of the flat plate of the hard plate material include wood, woody material, bamboo, gypsum board, metal, glass, and hard plastic. Among these, the radiation plate 2 may use a discarded building material such as a building. In this case, carbon dioxide is fixed over a long period of time, which leads to reuse of building materials to be discarded, thereby contributing to prevention of global warming. Preferably, the radiating plate 2 is formed of wood of building materials to be discarded. In this case, energy consumption during the production of the radiation plate 2 is small, and the environmental burden can be reduced by reusing the wood. More preferably, the radiation plate 2 is preferably formed of wood using Japanese cedar or thinned timber. In this case, it can contribute to the preservation of the forest environment and the maintenance of the forest, and the environmental burden due to energy during drying can be reduced. In addition, the radiation plate 2 does not have to be a completely flat plate, and is slightly warped, has small irregularities or nodes (tree branch parts) on the surface, or drops off the node parts (parts of withered branches) ), Which may be somewhat cracked.

The radiating plate 2 is made of hard plate wood. Hard board wood is a sufficiently dried wood that has reached an equilibrium state with a certain moisture content according to the temperature and humidity of the atmosphere. The X direction of b)) contracts. In addition, in the case of wood that is discarded as a building, the wood is sufficiently dried to become an old material during the period when it was used as a building, and by natural drying over time, the X direction and the Y direction of the wood (FIG. 3B) ) Is accelerated, and when exposed to air and ultraviolet rays, the wood is oxidized and the old wood becomes hard wood. The radiation plate 2 formed using such wood is a point sound source (see FIGS. 7 and 8) at the contact point of the abutting portion where the end of the transmission rod 4 of the vibration device 3 is formed in a convex curved shape. Thus, the vibration generated by the vibration device 3 is intensively received and becomes a strong vibration, and the vibration can be smoothly transmitted to the entire radiation plate 2. Moreover, it is preferable that the radiation plate 2 is formed in a square (X direction shown in FIG. 3A) using a conifer having an air-dry specific gravity of about 0.3 to 0.65. In this case, the vibration is transmitted by the fiber 103 of the annual ring ((b) of FIG. 3), amplified by the air layer 105, and radiated as sound. From the soft part of Natsume 106 where the amount of growth is large, a low sound is likely to be generated, and a vibration in which high sound and low sound are mixed is likely to occur. Further, such a radiating plate 2 made of wood has an appropriate viscosity, and the surface restitution coefficient is lower than that made of metal or hard plastic. For this reason, even when the radiating plate 2 is vibrated by either an excitation due to an instantaneous external force or a continuous excitation, the radiated sound becomes a “soft sound” with few high-frequency components. It is desirable to supplement the range.

The hardness required of the radiating plate 2 is well balanced between the resistance to the dent caused by the static pressing force and the elastic restoration amount after the load is removed, and is defined by JIS (Japanese Industrial Standards). It is better to use the Brinell hardness representing the hardness of the wood. As a test method, a steel ball having a diameter of 10 mm is press-fitted to a depth of 0.32 mm, and a value obtained by dividing the load at that time by the contact area is used as a hardness value. FIG. 4 simply represents an index of the tree type hardness, and represents the tree type in levels 1 to 7. The higher the level value, the harder. For example, the standard that can withstand heavy walks on the ground is level 4 or higher, and the larger the numerical level, the larger the numerical level, the greater the loss of vibration transmission and the smaller the sound spread. The grades 1 to 3 are good, for example, cedar, cypress, drill, black cherry, teak, walnut, etc. However, since expensive materials of hardwood are difficult to obtain, more preferably domestically produced Relatively cheap cedar and cypress are good. In this case, by applying a predetermined pressing force to the contact point of the abutting portion where the end of the transmission rod 4 of the vibration device 3 is formed in a convex curved surface shape, At the contact point of the contact portion (FIG. 8), an elastic restoring force due to a static pressing force is generated, and a force to repel the transmission rod 4 is generated, so that the transmission rod 4 and the radiation plate 2 are in close contact with each other, The transmission of vibration is enhanced, and the vibration generated from the vibration device 3 is efficiently transmitted to the radiation plate 2.

Such a radiating plate 2 is fixed in contact with the transmission rod 4 of the vibration device 3 by a predetermined pressing force directly against the flat surface side of the radiating plate 2 by the urging means 5. Is transmitted through annual rings with subtle differences in growth due to natural conditions, and is susceptible to subtle sounds.

In addition, such a radiation plate 2 is formed in the range of the sound radiation region S as shown in FIG. 2, for example, but if it is large, the thickness dimension is 20 millimeters x annual ring direction X. 600mm x fiber direction Y is formed using cedar wood pasted in a grid with dimensions in the range indicated by Z of about 1800mm, with the middle one having a thickness dimension of 12mm x annual ring direction X Is 300 millimeters x fiber direction Y is about 450 millimeters, and when it is long and thin, the thickness is 30 millimeters x annual ring direction X is 180 millimeters x fiber direction Y is about 300 millimeters. is not. Further, as shown in FIG. 5B, a metal thin plate 203 that is a hard plate material having a surface restitution coefficient higher than that of cedar, or an arbitrary material 204 such as a hard plastic, a melamine resin, or a sheet having a high surface hardness. By appropriately applying to the surface of the cedar, a sound including higher harmonic overtones and high frequency components can be obtained. In this case, the adhesive may be applied by applying an adhesive, or a double-sided tape having a strong adhesive force or a sheet-like material subjected to pressure-sensitive adhesive processing may be used. In addition, the material applied to the surface may be a paint, which may be impregnated into the radiation plate 2 and surface-cured, or may be provided with a thin film obtained by hardening the paint. It is.

The radiation plate 2 of the present invention is a hard plate material having a different surface restitution coefficient, such as wood, wood material, bamboo, hard plastic, metal, glass, gypsum board, or any combination thereof. By using a flat plate that forms a hollow panel using the above-mentioned material, it is possible to obtain a sound that includes higher harmonics and higher frequency components on the surface of one radiation plate 2. Yes, it supplements the lack of sound generated from the radiation plate 2 of the wood part.

FIG. 5 shows an example of the radiation plate 2 used in the present invention. (A) is a structure in which a plaster board is stretched on wood, and glass, metal, and hard plastic 26 are appropriately stretched in a mosaic pattern on the surface to form a flat plate, and a cloth or the like is stretched on the surface of the plaster board 25. In (b), a single flat plate is formed by using the wood 21 as a grid, and a thin metal plate 23 and a hard plastic, for example, a thin plate 24 of melamine resin, etc. are arbitrarily provided on the surface. In (c), among the hard plate materials, the wood 21 is used as a grid, and the hard plate materials 22 arbitrarily selected from metal, glass and hard plastic are alternately laminated. The radiating plate 2a, the radiating plate 2b, and the radiating plate 2c have different surface restitution coefficients by appropriately changing the surface area of the hard plate 21 or the hard plate 26. The area ratio of the hard plate, which can be adjusted range, than when using a single material timber, is intended to easily obtained a higher treble and harmonic.

The vibration device 3 is provided with a transmission rod 4 and an urging means 5. The urging means 5 is provided with an elastic body 51, an adjusting means 52, and a plate 53, and the vibration device 3 is in contact with the radiation plate 2 via the transmission rod 4 and fixed vertically by the urging means 5. 1 is a perspective view, FIG. 6 is a plan view, FIG. 7A is a cross-sectional view, FIG. 7B is a cross-sectional view illustrating the urging force of the urging means 5, and FIG. 8 is a transmission rod. FIG. 9 is a schematic view illustrating an enlarged contact point in which the end of 4 is formed in a convex curved surface shape and is in contact with the radiation plate 2 by an urging force, and FIG. 9 is a plan view illustrating an example of the urging means 5. is there. The vibration device 3 will be described with reference to FIGS. 6 and 9.

The vibration device 3 is provided with a transmission rod 4, and an urging means 5 is provided for abutting and fixing the transmission rod 4 perpendicularly to the radiation plate 2, and the urging means 5 has an elastic body 51. And an adjusting means 52 for adjusting a predetermined pressing force against a contact point of a contact portion between the end portion of the transmission rod 4 and the radiation plate 2 and a plate 53 are provided. The end portion of the transmission rod 4 is formed in a convex curved shape, and the transmission rod 4 provided on the extension line of the drive shaft 33 arranged on the center line 30 of the actuator composed of the magnet 31 of the vibration device and the voice coil 32. A predetermined pressing force is applied by the urging means 5 to the contact point between the end of the radiating plate 2 and the contact portion of the radiating plate 2, and a dent is formed on the radiating plate 2 side, and the elastic point due to the static pressing force is applied. A restoring force is generated and becomes a force to rebound the transmission rod 3. By using the repulsive force to rebound, the biasing means 5 can abut the vibration device 3 perpendicularly to the radiation plate 2 by the adjusting means 52 via the elastic body 51. The radiation plate 2 is fixed vertically and is in close contact with the radiation plate 2.

The vibration device 3 is fixed in this way, and the transmission rod 4 abuts the radiation plate 2 vertically even when the radiation plate 2 is used on the wall surface (vertical surface). When used for (vertical surface), as shown in FIG. 10, the vibration device 3 is in a suspended state due to its own weight, the transmission rod 4 cannot be applied perpendicularly to the radiation plate 2, distortion occurs, and the transmission rod is refracted. Then, it is brought into contact with the transmission member. Also, when used on the ceiling surface (opposite to the horizontal plane), the loosened coupling holes will not be able to fully transmit the vibration generated from the vibration device to the transmission member in the loose state, and will be transmitted to the entire radiation plate. However, the vibration device 3 of the present invention is fixed in contact with the radiation plate 2 by the biasing means 5 so that the vibration generated from the vibration device is efficiently transmitted to the radiation plate. It is preferable.

The transmission rod 4 of the vibration device 3 has an end formed in a convex curved shape, is provided on an extension line of the drive shaft 33 disposed on the center line 30 of the actuator constituting the vibration device 3, and has a thickness h1 of the elastic body 51. It is preferable that the tip protrudes from the line connecting the two to 0.1 mm to 0.3 mm. When such a transmission rod 4 is brought into contact with the radiation plate 2 by the biasing means 5 applying a predetermined pressing force by the adjusting means 52 through the elastic body 51, the elastic body 51 is compressed and has a thickness h2. The h3 is a dent generated by the static pressing force, and the drive shaft 33 moves up and down due to the vibration generated from the vibration device 3. Even when the end of the interlocking transmission rod 4 moves up and down, the contact portion of the transmission rod 4 with the radiation plate 2 does not float, and the vibration generated from the vibration device 3 is transmitted to the radiation plate 2. Is something that can be done. The transmission rod 4 may be formed separately from the drive shaft 33 or may be formed integrally. For example, in the case of the transmission rod 4 formed separately, the transmission rod 4 shown in FIG. As described above, the fixed portion of the transmission rod 4 is bonded and fixed to the fixing base disposed on the extended line of the drive unit shaft 33 so that the fixed portion of the transmission rod 4 substantially matches. That is, the center of the magnet 31 of the actuator constituting the vibration device 3, the center of the voice coil 32, the center of the drive shaft 33, and the center of the transmission rod 4 are the contact points where the radiation plate 2 is in contact, and are planar. The structure is such that the centers in the three directions of the vertical direction, the horizontal direction, and the vertical direction of the cross section match, and is provided so that the centers of the three directions match, and the transmission rod 4 abuts the radiation plate 2 vertically. The electric signal input to the vibration device 3 is converted into physical vibration and is applied to the contact point of the contact portion formed in the convex curved surface shape of the end portion of the transmission member 4 provided on the extension line of the drive shaft 33. Since it is transmitted efficiently and is brought into contact with the radiation plate 2 with a predetermined pressing force by the biasing means 5, the vibration generated from the vibration device 3 is applied to the end portion of the transmission rod 4 formed in a convex curved shape. The center point sound source is transmitted at the contact point of the contact part. . The center point sound source of the vibration device 3 can be easily obtained by bringing the end portion of the transmission rod 4 into contact with the radiation plate 2 at a portion where the end portion of the transmission rod 4 is formed in a convex curved shape. That is, when vibration is transmitted from the vibration device 3 to the transmission rod 4 and the end of the transmission rod 4 is brought into contact with the radiation plate 2, the contact point of the contact portion is generated from the vibration device 3 as a central point sound source. The vibration becomes a strong vibration, and the vibration is intensively transmitted to one point. In this case, as long as the actuator of the vibration device 3 is provided with a drive shaft, the drive method may be a method using a voice coil or other methods. . The end of the transmission member 4 provided on the extension line of the drive shaft 33 may be slightly deviated as long as it is within the range of the diameter of the drive shaft 33, and is provided outside the diameter of the drive shaft. The moment acts on the distance generated by the strong vibration generated by the vibration device 3 and the transmission efficiency of the vibration is reduced. However, if the vibration is within the diameter range of the drive shaft 33, the vibration can be transmitted efficiently. it can.

Further, such a transmission rod 4 is fixed by applying a predetermined pressing force to the contact point of the abutting portion of the radiation plate 2 by the elastic body 51 and the adjusting means 52 provided in the urging means 5. The transmission rod 4 plays a role of transmitting the vibration generated from the vibration device 3 to the contact point on the side of the radiation plate 2 by the contact point of the contact portion. Such a speaker device transmits the vibration generated from the vibration device 3 to the radiation plate 2 and a strong vibration in which the vibration is concentrated at one point as a point sound source. Further, the vibration device 3 is fixed to the radiation plate 2 by the adjusting means 52 via the elastic body 51 provided in the urging means 5, and adjusting means using the repulsive force generated by the compression of the elastic body 51 of the urging means 5. 52. Since the fixing plate 52 is fixed to the radiation plate 2, a predetermined pressing force is efficiently applied to the contact point of the contact portion of the transmission rod 4 by the adjusting unit 52 of the urging unit 5. 3 does not occur even if strong vibration is generated from 3, and vibration chatter does not occur at the contact point between the transmission rod 4 and the radiation plate 2 due to strong vibration. The vibration can be transmitted to the radiation plate, the sound volume is ensured, and a clear sound with a wide sound range can be produced.

Further, the transmission rod 4 is made of a hard material. For example, it is made of metal, hard plastic, glass, bamboo, wood material, etc., but the transmission rod 4 made of metal, hard plastic or glass is a metal or hard plastic whose radiation plate 2 is a hard material. When it is brought into contact with a flat surface formed of glass or glass, a strong vibration is generated from the vibration device 3 because the radiating plate 2 is less likely to be dented and an elastic restoring force due to a static pressing force is not easily generated. In this case, a phenomenon that the contact point rises momentarily may occur, and vibration chatter may occur at the contact point between the transmission rod 4 and the radiation plate 2 due to strong vibration. The surface of the radiation plate 2 made of hard plastic or glass may be cracked (cracked), but when the radiation plate 2 is made of wood as shown in FIG. 7. As shown in FIG. 8, the abutment portion that is abutted and fixed using the urging means 5 due to the dent on the side of the radiation plate 2 caused by the static pressing force to generate an elastic restoring force. In other words, even if strong vibration is generated from the vibration device 3, a phenomenon that the contact point rises instantaneously does not occur.

Further, when the transmission rod 4 is formed of wood, the end of the transmission rod 4 is obtained even when the radiation plate 2 is brought into contact with a plane made of a hard material such as metal, hard plastic, or glass. The elastic restoring force is generated by the compression by the static pressing force on the part, and the force to rebound the radiation plate 2 works, but it is absorbed by the elastic body 51 and the strong vibration is generated from the vibration device 3. Even in such a case, the phenomenon that the contact point rises instantaneously does not occur, and vibration chatter does not occur at the contact point between the transmission rod 4 and the radiation plate 2 due to strong vibrations. The generated vibration can be transmitted to the radiation plate 2 and is preferable.

Further, the size of the transmission rod 4 is formed in a substantially circular cross section with the same dimension as the diameter of the drive shaft of the vibration device 3. For example, when the diameter of the drive shaft is 10 millimeters, the diameter of the transmission rod 4 is about 12 millimeters to 3 millimeters, but the end portion is formed in a convex curved surface shape so that the contact portion becomes a contact point. Since it is formed, some dimensional error is allowed, but if it is too small, a condition such as indentation into the radiating plate 2 occurs. Therefore, the diameter of the transmission rod is preferably about 9 mm to 5 mm, more preferably The wood is preferably about 6 mm in diameter. In this case, as shown in FIG. 8, the transmission rod 4 is easy to form the end portion into a convex curved surface shape and is easy to process. When a predetermined pressing force is applied by the urging means 5, the end of the transmission rod 4 is An elastic restoring force due to a static pressing force is generated in the portion formed in the convex curved shape of the portion, and a force to rebound the radiation plate 2 at the contact point of the contact portion is generated, and the biasing means 5 The vertical movement of the vibration generated from the vibration device 3 is absorbed by the compression repulsive force of the elastic body 51, and the contact point of the contact portion is fixed tightly without floating.

As shown in FIGS. 6 and 9, the urging unit 5 includes an elastic body 51, an adjusting unit 52, and a plate 53, and is provided on the casing of the vibration device 3. The urging means 5 applies a predetermined pressing force to the contact point of the convex curved contact portion formed at the end of the transmission rod 4 and is generated from the vibration device 3 to the radiation plate 2. It has a role of efficiently transmitting vibration, and the urging means 5 can be provided in an appropriate shape. For example, FIG. 6 shows an example in which the biasing means 5 is provided in a circle and the elastic body 51 and the adjusting means 52 are arranged at three locations, and as shown in FIGS. 9 (a), 9 (b), and 9 (c). (A) is an example in which the urging means 5 is provided in a circular shape and the elastic body 51 and the adjusting means 52 are arranged at four locations, and (b) is an example in which the urging means 5 is arranged. An example in which the elastic body 51 and the adjusting means 52 are arranged in three places provided in a triangle, and (c) is an example in which the urging means 5 is provided in a square shape and the elastic body 51 and the adjusting means 52 are arranged in four places. However, it is not restricted to these.

The plate 53 portion for providing the elastic body 51 and the adjusting means 52 of the urging means 5 can be formed of an appropriate material, but preferably the same material as that used for the radiation plate 2 is good. . For example, if the radiation plate 2 is made of wood, wood is good. In this case, it is easy to process into an appropriate shape, energy consumption at the time of manufacture is low, the load on the environment can be reduced, and in synchronization with the material characteristics formed of the wood of the radiation plate 2, The vibration is transmitted smoothly and is preferable.

  The urging means 5 is fixed to the radiation plate 2 by the adjusting means 52 and the plate 53 via the elastic body 51. The adjusting means 52 can adjust the force to be tightened by a screw, and can adjust the delicate tightening force by using the repulsive force due to the compression of the elastic body 51. In this case, the adjusting means 52 is preferably arranged in the vicinity of the elastic body 51, and the tip of the transmission rod 4 connects the thickness h1 of the elastic body 51 as shown in FIG. It is preferable to protrude from the line by 0.1 mm to 0.3 mm. When such a transmission rod 4 is brought into contact with the radiation plate 2 by the biasing means 5 applying a predetermined pressing force by the adjusting means 52 through the elastic body 51, the elastic body 51 is compressed and has a thickness h2. The h3 is a dent generated by the static pressing force, and the drive shaft 33 moves up and down due to the vibration generated from the vibration device 3. Even when the end of the interlocking transmission rod 4 moves up and down, the contact portion of the transmission rod 4 with the radiation plate 2 does not float, and the vibration generated from the vibration device 3 is transmitted to the radiation plate 2. In addition, by using a method of bonding by combining the force to rebound the transmission rod 4 by the elastic restoring force generated at the contact point of the contact portion and the compression repulsive force of the elastic body 51 This is also a good place The adjusting means 52 is used to adhere and fix the housing of the vibration device 3 and the radiation plate 2 using an adhesive force that restrains the repulsive force of the elastic body 51. The transmission rod 4 connects the line of the elastic body 51 with h1. The end is projected from the position of about 0.1 mm to 0.3 mm, and the tip portion formed in a convex curved body shape is provided in a state of protruding from the elastic body 51 to provide the biasing force and the elastic body 51. It is good to increase the compression repulsion force and apply adhesion. Also, a combination of adhesion and screws may be used.

  The elastic body 51 plays a role for appropriately adjusting the force for pressing the transmission rod 4 against the radiation plate 2 using the adjusting means 52. By applying a predetermined pressing force to the contact point of the contact portion of the transmission rod 4 of the vibration device 3 to the radiation plate 2, the contact point of the contact portion on the radiation plate 2 side is caused by the static pressing force. An elastic restoring force is generated, and a force to rebound the transmission rod 4 is generated. The force to rebound is absorbed, and the vertical movement of the vibration generated from the vibration device 3 is transmitted to the radiation plate 2 side. The adjustment means 52 can be finely adjusted. When the predetermined pressing force against the contact point of the abutting portion where the end portion of the transmission rod 4 is formed in a convex curved surface shape is weak, the problem that the vibration generated from the vibration device 3 cannot be transmitted to the radiation plate 2 occurs. If the force of pressing the radiation plate 2 and the end of the transmission rod 4 against the contact point of the abutting portion formed in a convex curved surface shape is strong, weak vibration is not transmitted and a clear sound with a wide sound range is produced. However, when the vibration device 3 is fixed to the radiation plate 2 by the adjusting means 42 via the elastic body 51, these problems can be avoided and vibration generated from the vibration device 3 can be prevented. There is an effect that the sound can be efficiently transmitted to the radiation plate 2 and a clear sound with a wide sound range can be produced.

  The material used for the elastic body 51 may be a metal or plastic spring washer or a plastic or rubber foam, preferably a rubber foam, and more preferably a foam made of chloroprene rubber. Chloroprene rubber has properties averaged in terms of light resistance, chemical resistance, etc., and is used as an anti-vibration rubber for wire coverings and acoustic equipment, and an elastic body 51 provided in the biasing means 5 of the vibration device 3. Since it has excellent compression permanence, rebound resilience, and aging resistance, the vibration generated from the vibration device 3 can be reduced even if a slight pressing force is applied to the transmission rod 4 by the adjusting means 52. It can be efficiently transmitted to the radiation plate 2 and can be easily formed into an appropriate shape, and the end of the transmission rod 4 is formed into a convex curved shape by the adjusting means 52 of the urging means 5. Pressure is efficiently applied to the contact point of the contact portion. For example, even if strong vibration is generated from the vibration device 3, the phenomenon that the contact point rises does not occur, which is preferable as the material of the elastic body 51. The biasing force applied to the contact point of the abutting portion where the end of the transmission rod 4 is formed in a convex curved surface due to the compression permanent or rebound resilience of the elastic body 51 is approximately 500 g in the case of an actuator with an output of about 5 W. ˜1000 g / contact point (the force applied to the contact portion of the transmission rod 4 is approximately 500 g to 1000 g), but a proportionally large urging force is required as the output increases. Further, when the tightening force of the adjusting means 52 is adjusted while checking the vibration transmitted from the vibration device 3 to the radiation plate 2 and the sound emitted, it is not restricted by these numerical values.

In the speaker device of the first embodiment, the transmission device provided on the extension line of the drive shaft 33 of the vibration device 3 is provided with the vibration device 3 on the radiation plate 2 made of a hard plate material. 4 is formed in the shape of a convex curved body, and vibration is intensively transmitted as a central point sound source to the contact point of the contact portion, and the transmission rod 4 is pressed with a predetermined pressing force. Since the vibration generated from the vibration device 3 can be efficiently transmitted to the radiation plate 2 because it is fixed vertically to the radiation plate 2, the sound volume is secured, higher harmonics are easily produced, and a wide sound range is obtained. There is an effect that can produce a clear sound.

In addition, the speaker device of the first embodiment can be used as the radiation plate 2 by directly contacting the floor, wall, ceiling, furniture, furniture, or the like. In this case, it may be provided on either of the front and back surfaces, and the part beyond the sound radiation area S in FIG. 2 is formed on the surface by the rigidity of the part fixed by the pillar, the girder, the trunk edge, the core material, or the like. Since tension is generated and the bending of the hard plate material vibrates greatly at a specific frequency due to a resonance (resonance) phenomenon, a heavy bass range can be obtained. For example, it is a wall of a wooden structure with a height of 2400 millimeters and a width of 2700 millimeters, and a total of 2700 millimeters between pillars provided at intervals of 900 millimeters, and eight wooden trunk edges are 300 millimeters apart. A 12.5mm gypsum board is fixed by screws and a vinyl cloth is stretched on top of it, and a 9mm thick x 90mm wide x 900mm long cocoon board is on top It is provided over 2700 mm, the speaker device of the first embodiment is brought into contact with the surface of the heel plate, and is fixed to the wooden trunk edge via a plaster board using a hidden nail. In this case, the portion provided with the ridge plate becomes the main radiating plate 2, and the other portion becomes a continuous hard plate portion, and the vibration gradually weakens in the peripheral portion. The vibration of the radiation plate made of the hard plate material of the present invention is implemented by knowledge of acoustics and knowledge of physics.

FIG. 11 is a cross-sectional view of the speaker device of the second embodiment. In this example, the urging means 5 is formed in a shape that covers the vibration device 3 so as to protect it. The planar shape of the urging means 5 is a circle, a triangle, or a quadrangle, as shown in FIG. 9, and is formed of a hard material such as metal or hard plastic.

FIG. 12 is a cross-sectional view of the speaker device of the third embodiment. A hollow panel is configured by the two radiation plates 2 and 2d and the core member 11 which are arranged to face each other with the vibration device 3 of the speaker device of the first embodiment interposed therebetween. The radiation plate 2 uses a flat plate formed in a hollow panel using two different hard plate materials. The radiating plates 2 and 2d have a structure in which they are bonded from both sides so as to face each other through a core material, and the core material also serves as a vibration transmitting member, other than the core material inside the hollow panel The portion may be hollow, or may be filled with glass wool or styrene. Further, the two hard plate materials may be of the same quality, and flat plates made of different hard plate materials may be used. In this case, the vibration transmitted from the vibration device 3 spreads concentrically around the portion where the vibration device 3 is in contact with the radiation plate 2, and is transmitted to the radiation plate 2 d through the core 11. Also, existing walls and ceilings may be used.

FIG. 13 is a cross-sectional view of the speaker device of the fourth embodiment. This is an example in which the loudspeaker device according to the first embodiment is used to form a large diaphragm in contact with a radiation plate made of an even larger hard plate material. Such a speaker device can obtain a large radiation plate that exceeds the sound radiation region S. For example, the annual ring direction X can be obtained by using a grid of cedar thinned wood having a thickness dimension of 12 mm. Can be brought into contact with the radiation plates 2e-1 to 2e-8 larger than the radiation plate 2 formed in an arbitrary shape. 14 shows a triangle like 2e-1, an ellipse like 2e-2, a grand piano deformation like 2e-3, a heart shape like 2e-4, a 2e-5 pentagon, 2e-6 瓢 箪Shape, 2e-7 elliptical split shape, 2e-8 saw shape, etc. Furthermore, the radiation plate 2e imitating the external shape of a musical instrument such as a piano or a violon can be appropriately formed into any shape. It is not restricted by the shape or size of Further, the contact method may be a fixing method by bonding, or a fixing method that can be detached using screws.

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 2 Radiation plate 3 Vibration apparatus 4 Transmission rod 5 Energizing means

Claims (9)

A vibration device is provided on a radiation plate made of a hard plate material, and a vibration generated by the vibration device is transmitted to the radiation plate and radiated as sound from the radiation plate, and is in contact with the radiation plate. The end of the transmission rod of the vibration device that transmits the vibration of the vibration device to the radiation plate is formed in a convex curved shape, and is pressed against a contact point of the contact portion between the transmission rod and the radiation plate. A speaker device, characterized in that biasing means is provided to apply force to contact the radiation plate.   The speaker device according to claim 1, wherein an adjustment unit that adjusts an urging force of the urging unit is provided. The radiation plate may be a flat plate made of wood, wood material, bamboo, hard plastic, metal, glass, gypsum board, or any combination thereof, or a hollow panel using the material. The speaker device according to claim 1 or 2, wherein any one of the configured flat plates is a radiation plate. The speaker device according to any one of claims 1 to 3, wherein an end portion of the transmission rod of the vibration device is provided on an extension line of a drive shaft of an actuator constituting the vibration device.   5. The transmission rod according to claim 1, wherein the transmission rod is formed using wood, bamboo, metal, glass, or hard plastic, and is in contact with any one of a front surface and a back surface of the radiation plate. The speaker device according to any one of claims. The sound quality radiated as sound from the radiation plate can be changed by applying vibrations generated by the vibration device to the radiation plate by applying an arbitrary hard material to the surface of the radiation plate. 6. The speaker device according to any one of 5 above. The speaker device according to any one of claims 1 to 6, wherein the radiation plate is brought into contact with a hard plate material larger than the radiation plate to form a second radiation plate. The speaker device according to claim 7, wherein the second radiation plate has a planar shape formed of a hard plate material using a straight line or a curved line in an arbitrary shape. The speaker device according to claim 7, wherein the second radiation plate is configured of any one of a wall surface, a ceiling surface, a floor surface, and furniture.