JP2019221003A - Speaker device - Google Patents

Abstract

To provide a speaker device which can efficiently transmit vibration generated by a vibratory device to a diaphragm, secures the sound volume, and can emit clear sound in a wide range.SOLUTION: A speaker device 1 is a device in which a vibratory device 3 is placed in contact with one plane side of a diaphragm 2 and which emits vibration transmitted from the vibratory device 3 from the diaphragm 2 as sound. The speaker device 1 includes: the diaphragm 2; the vibratory device 3; a frame body 4 which is provided at the diaphragm 2 so as to enclose the vibratory device 3; and an elastic body 5 which is provided facing the plane side of the diaphragm 2 across the frame body 4 and the vibratory device 3. The frame body 4 is provided forming a gap with an outer periphery of the vibratory device 3. The elastic body 5 is spanned between the frame body 4 and the vibratory device 3 and is fastened thereto in the state. The frame body 4, the vibratory device 3, and the elastic body 5 are integrated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a speaker device.

  Conventionally, various types of speaker devices have been proposed. For example, Patent Literature 1 discloses a speaker device. This speaker device includes an amplifying means provided on the other end of a cylindrical driving member having one end provided on a cap made of an elastic material for protecting a voice coil of an actuator so as to cover the driving member, and an amplifying means provided on the amplifying means. The end portion of the voice coil and the end portion of the driving member are arranged to face each other with the cap interposed therebetween.

  However, the speaker device disclosed in Patent Literature 1 does not take measures to prevent movement of the drive shaft connected to the radiation plate other than the operation direction when vibration is generated by being connected to the radiation plate. When trying to obtain a sound volume, there is a problem in that a movement other than the operation direction of the drive shaft occurs, and the sound transmission efficiency tends to decrease.

JP 2015-156605 A

  An object of the present invention is to provide a speaker device capable of efficiently transmitting vibration generated from a vibration device to a diaphragm, securing a sound volume, and emitting clear sound in a wide range. is there.

  The speaker device of the present invention is a speaker device in which a vibration device is in contact with one flat surface side of a diaphragm, and radiates vibration transmitted from the vibration device as sound from the diaphragm, and the speaker device includes: The vibrating plate, the vibrating device, a frame provided on the vibrating plate so as to surround the vibrating device, and a frame provided facing the flat side of the vibrating plate with the frame and the vibrating device interposed therebetween. The frame body is provided with a gap between the outer periphery of the vibrating device, and the elastic body extends over the frame body and the vibrating device. The frame is fixed to the vibration device, and the frame, the vibration device, and the elastic body are integrated.

  The entire surface of the vibration device and the frame on the side opposite to the plane of the vibration plate is fixed to the elastic body.

  The outer peripheral shape of the vibrating device is substantially cylindrical, the inner peripheral shape of the frame on the vibrating device side is a substantially cylindrical shape facing the outer peripheral shape of the vibrating device, and the driving shaft of the vibrating device is A radial gap provided between the inner periphery of the frame and the outer periphery of the vibrating device is provided at the center of the vibrating device, and is characterized by being constant throughout the circumferential direction.

  In the vibration device, an end of the drive shaft is in contact with the flat surface of the vibration plate so that a biasing force is generated in an axial direction of a drive shaft of the vibration device when the vibration device is operated. It is characterized by.

  The speaker device includes another vibration member that is in contact with the diaphragm.

  The speaker device according to the present invention is a device in which a vibration device is in contact with one flat surface side of the vibration plate, and radiates vibration transmitted from the vibration device as sound from the vibration plate. A frame provided on the diaphragm so as to surround the vibrating device, and an elastic body provided on the plane side of the diaphragm with the frame and the vibrating device interposed therebetween. The elastic body is fixed to the frame body and the vibration device so as to straddle the frame body and the vibration device, and the frame body, the vibration device, and the elastic body are integrated. When the vibration device is activated, an operation follows the operation of the vibration device in the drive axis direction, and the elastic body moves the vibration device in the direction in which the vibration device and the frame are juxtaposed. In addition to preventing movement, a biasing force is applied to the vibration device in the drive axis direction of the vibration device. That. Thus, the vibration generated from the vibration device is efficiently transmitted to the vibration plate in contact with the vibration device, the sound volume is secured, and clear sound in a wide sound range can be emitted.

  In the case where the entire surface of the vibrating device and the frame on the side opposite to the plane of the vibrating plate is fixed to the elastic body, the elastic body moves the vibrating device in the direction in which the vibrating device and the frame are juxtaposed. The movement can be further prevented, and the urging force in the drive axis direction of the vibration device can be applied to the vibration device without waste.

  Further, the outer peripheral shape of the vibrating device is substantially cylindrical, the inner peripheral shape of the frame body on the vibrating device side is a substantially cylindrical shape opposed to the outer peripheral shape of the vibrating device, and the driving shaft of the vibrating device is In the case where the radial gap between the inner circumference of the frame and the outer circumference of the vibration device is constant in the entire circumferential direction, the biasing force due to the elastic body is eliminated, and the vibration is reduced. The vibration generated from the device is transmitted to the diaphragm more efficiently. For this reason, the sound volume is further secured, and a clearer sound in a wider range can be produced.

  Further, in the case where the vibration device has a configuration in which the end of the drive shaft is in contact with the flat surface of the vibration plate so that an urging force is generated in the axial direction of the drive shaft when the vibration device operates, the vibration device The end of the drive shaft that abuts does not float, and the vibration generated by the vibration device is continuously transmitted to the diaphragm. Further, it becomes a point sound source at the contact point of the abutting portion at the end of the drive shaft, and receives the vibration generated by the vibration device intensively, resulting in strong vibration.

  In the case where the speaker device includes another vibration member that is in contact with the diaphragm, the volume is secured from another vibration member such as the second diaphragm, a wall, a ceiling, a floor, or furniture. It can produce clear sound in a wide range.

It is a perspective view showing a 1st example of a speaker device of the present invention. FIG. 2 is a plan view of the speaker device of FIG. 1. It is sectional drawing of the speaker apparatus of FIG. FIG. 5 is a plan view showing a second embodiment of the speaker device of the present invention. It is sectional drawing of the speaker device of FIG. It is a top view showing a 3rd example of a speaker device of the present invention. It is sectional drawing of the speaker apparatus of FIG.

Hereinafter, embodiments for implementing the present invention will be described.
FIGS. 1 to 3 are views showing a first embodiment of the speaker device of the present invention.
The speaker device 1 is a device in which the vibration device 3 is in contact with one plane side of the vibration plate 2 and radiates the vibration transmitted from the vibration device 3 as sound from the vibration plate 2. The speaker device 1 includes a vibration plate 2, a vibration device 3, a frame 4 provided on the vibration plate 2 so as to surround the vibration device 3, and the flat surface of the vibration plate 2 with the frame 4 and the vibration device 3 interposed therebetween. And an elastic body 5 provided facing the side. The frame 4 is provided with a gap 32 between itself and the outer periphery of the vibration device 3. The elastic body 5 is fixed to the frame 4 and the vibration device 3 over the frame 4 and the vibration device 3. Thereby, the frame body 4, the vibration device 3, and the elastic body 5 are integrated. The vibration device 3 has a drive shaft 31, the end of which is in contact with the vibration plate 2. The drive shaft 31 is fixed to the vibration device 3 and is integrated with the vibration device 3. In this embodiment, one vibrating device 3 is provided for the vibrating plate 2; however, the present invention is not limited to this, and a plurality of vibrating devices 3 can be provided.

  As shown in FIGS. 1 to 3, a substantially columnar drive shaft 31 provided near the vibration axis of the vibration device 3 is in contact with the vibration plate 2. The axial direction of the drive shaft 31 is along the Z direction in the drawing, and the end of the drive shaft 31 is substantially perpendicular to the plane (plane in the XY direction) of the diaphragm 2. The vibration generated by the vibration device 3 is designed to concentrate on a portion of the vibration plate 2 where the drive shaft 31 is in contact. For this reason, the vibration device 3 can efficiently transmit the vibration to the diaphragm 2 even if the vibration is weak. The vibration plate 2 includes a frame 4 disposed so as to surround the vibration device 3 and the vibration device 3 on the side opposite to the drive shaft 31 that is in contact with the vibration plate 2 of the vibration device 3. The surface is connected to the frame 4 via the elastic body 5. The elastic body 5 operates so as to follow the operation of the drive shaft 31, and the diaphragm 2, the frame 4, the vibration device 3, and the elastic body 5 are integrated. In this case, the vibration generated from the vibration device 3 can be continuously and efficiently transmitted to the diaphragm, the sound volume can be secured, and clear sound in a wide range can be produced.

  However, when the frame 4, the vibration device 3, and the elastic body 5 are not integrated, the vibration device 3 moves the contact point of the drive shaft 31 that is in contact with the vibration plate 2 when the vibration device 3 operates. There is a concern that an operation like a pendulum may occur as a fulcrum and hinder the operation of the drive shaft 31 on the drive shaft in the Z direction. As a result, there is a possibility that the vibration generated from the vibration device 3 cannot be continuously and efficiently transmitted to the diaphragm.

  The same effect can be obtained by the provision of the elastic body 5 whether the drive shaft 31 of the vibrating device 3 is fixed at a position in contact with the vibrating plate 2 or left stationary without being fixed. .

  As shown in FIGS. 1 to 3, the elastic body 5 includes a frame 4 provided on the vibration plate 2, a gap 32 uniformly arranged on the outer periphery of the vibration device 3, and the vibration device 3. The vibrating device 3 on the side facing the diaphragm 2 with the frame 4 interposed therebetween and the entire surface of the frame 4 in the X and Y directions are provided so as to cover the vibration plate 2. Specifically, the outer peripheral shape of the vibration device 3 is substantially cylindrical, and the inner peripheral shape of the frame body 4 on the side of the vibration device 3 is a substantially cylindrical shape opposed to the outer peripheral shape of the vibration device 3. Is provided at the center of the vibration device 3, and the radial gap 32 between the inner periphery of the frame 4 and the outer periphery of the vibration device 3 is constant throughout the circumferential direction. The entire surface (the entire surface in the X direction and the Y direction) of the vibrating plate 3 in the vibration device 3 and the frame body 4 on the flat side (the side in contact with the vibrating device) is fixed to the elastic body 5. By providing such a uniform gap, the distortion of the urging force described later due to the elastic body is eliminated, and the vibration generated from the vibration device is transmitted to the diaphragm more efficiently.

  In the speaker device of the present invention, the frame 4 and the vibration device 3 are connected to each other by being fixed to the elastic body 5 in a state where there is no internal stress (tension or bending). The fixing method is not particularly limited, but any method such as bonding by applying an adhesive, bonding with a double-sided tape, and fusion bonding between members can be adopted. In particular, the entire surface (the entire surface in the X direction and the Y direction) of the vibrating device 3 and the frame 4 on the flat side of the vibration plate 2 is uniformly adhered using an adhesive or a double-sided tape. It is preferable to fix to the surface. If only a few places are fixed with screws or the like, there is a possibility that the urging force described later by the elastic body may not be sufficiently obtained, or the urging force may be distorted (X direction or Y direction). By attaching a double-sided tape or the like to the entire surface of the elastic body 5 when the frame body 4 and the vibration device 3 are fixed to each other, the portion of the elastic body 5 that covers the gap 32 has its adhesive or the like exposed as it is. State. Small dust or the like mixed in the space surrounded by the diaphragm 2, the frame 4, and the elastic body 5 is adsorbed to this portion, and the adverse effect on sound can be reduced.

  When the elastic member 5 is provided as in the above configuration, when the vibrating device 3 is not operated, the stress acting as an urging force does not work in any of the X direction, the Y direction, and the Z direction of the elastic member 5, and the vibrating device 3 does not work. Is stable. When the vibration device 3 is operated, the elastic body 5 is operated in the X direction, the Y direction, and the Z direction, and internal stress is generated. In the operation of the vibration device 3 in the X direction and the Y direction, tension and bending are applied to the gap 32. Such operations work simultaneously. The internal stress generated in the elastic body 5 is relieved in the gap 32, and the movement of the vibration device 3 in the juxtaposition direction (X direction and Y direction) of the vibration device 3 and the frame 4 is prevented and stabilized. On the other hand, since the elastic body 5 follows the operation of the drive shaft 31 in the Z direction (FIGS. 1 to 3) of the vibration generated by the vibration device 3, the internal stress is generated in the elastic body 5. Since the elastic body 5 is fixed to the frame 4 and the vibration device 3 by uniform adhesion over the entire surface or the like, a repulsive force against internal stress is generated, and the repulsive force becomes an urging force on the vibration device 3. .

  Further, as described above, when the vibration device 3 is operated, the elastic member 5 performs an operation following the operation of the drive shaft 31 of the vibration device 3 in the Z direction, and the internal stress is applied to the elastic member 5. Then, the repulsive force of the internal stress in the Z direction (FIGS. 1 to 3) acts as an urging force applied to the vibration device 3. Due to this urging force, the portion of the vibration device 3 that contacts the vibration plate 2 does not float, and the vibration generated by the vibration device 3 can be continuously transmitted to the vibration plate 2. Further, the urging force is a force in the Z direction, which is the vibration direction of the drive shaft 31, without displacement in the X direction or the Y direction. As a result, the vibration generated by the vibration device 3 can be efficiently transmitted to the diaphragm 2, the sound volume can be secured, and clear sound in a wide range can be produced. In particular, even when the vibration of the vibration device is a weak vibration, a clear sound in a wide sound range can be emitted.

  The elastic body 5 is not particularly limited as long as it can inhibit the movement of the vibrating device 3 in the direction in which the vibrating device 3 and the frame 4 are juxtaposed and follow the vibrating operation of the drive shaft 31 of the vibrating device 3. Not done. For example, it may be formed into a sheet having a predetermined thickness using rubber. As a more specific example, the frame 4 is formed of a sheet-shaped material made of foamable natural rubber having a thickness of about 1 mm to 10 mm using rubber, preferably adjusted to 3 mm. It is preferable that the shape is processed in accordance with the external shape. It is also possible to use a material having a similar function.

  The frame 4 is preferably formed of a material used for the diaphragm 2. The shape is preferably as illustrated in FIGS. 1 to 3. That is, the elastic body 5 at the time of standing still has a flat sheet shape parallel to the diaphragm 2, and the fixing surface of the elastic body 5 to the frame 4 and the vibration device 3 is a plane parallel to the diaphragm 2. Specifically, the dimension of the frame 4 in the Z direction is such that the surface of the vibration device 3 that is obtained when the vibration device 3 is allowed to stand still on the vibration plate 2 is opposite to the surface on which the drive shaft 31 is provided. When the elastic body 5 is provided so as to be parallel to the surface 2 and to be flush with the surface of the frame 4 on the side opposite to the diaphragm 2, the internal stress is applied in the Z direction of the elastic body 5. It is preferred that the dimensions be such that they do not exist. Further, the planar shape of the frame body 4 is preferably formed in a square having one side of approximately two times the planar size of the vibration device 3.

  The diaphragm 2 may be a member to which vibration from the vibration device 3 is transmitted and emitted as sound. For example, a hard plate material (a flat plate shape) that smoothly transmits vibrations and radiates as sound is used. Examples of the material of the flat plate of the hard plate include wood, woody material, bamboo, gypsum board, metal, glass, and hard plastic. Among these, it is preferable to use wood such as building materials discarded from a building for the diaphragm 2.

  The diaphragm 2 is formed of, for example, a hard plate material (wood). Hard wood is wood that has been sufficiently dried and has reached an equilibrium state with a constant water content according to the temperature and humidity of the atmosphere. The wood of the wood is shrunk by the sufficient drying. Also, in the case of wood discarded from buildings, the wood is sufficiently dried and used as wood during the period it was used as a building, and the wood shrinks due to natural drying over time, and is exposed to air and ultraviolet rays. As a result, the wood is oxidized and the old wood becomes hard wood. The diaphragm 2 made of such a wood tends to be a point sound source at the contact point of the end of the drive shaft 31 of the vibration device 3 at the contact portion, and the vibration generated by the vibration device 3 is intensively received. The vibration is transmitted to the whole of the diaphragm 2 smoothly.

  In addition, it is preferable that the diaphragm 2 be formed in a straight grain using softwood having an air-dry specific gravity of about 0.3 to 0.65. In this case, the vibrations are transmitted by the fibers of the annual rings, and are amplified and radiated as sound by the whole of the diaphragm 2, so that high-pitched sounds are apt to come out from the hard parts of the winter-growth where the growth amount is small, and the soft-summer of the summer-grown part where the growth amount is large. Bass is likely to be emitted from the part, and vibrations in which the treble and bass are mixed are likely to occur. Further, such a diaphragm 2 made of wood has an appropriate viscosity, and its surface has a lower coefficient of restitution than those made of metal or hard plastic. For this reason, even when the diaphragm 2 is vibrated by either the instantaneous excitation by the external force or the continuous excitation, the radiated sound has a "soft sound" with a small high-frequency component. In addition, it is also possible to use the vibration device as an amplification device and abut it against another larger vibration member (a second diaphragm, a wall, a ceiling, a floor, furniture, or the like) and use it as a speaker device.

  When the above-described vibration member is included, the entire speaker device including the vibration member is the speaker device of the present invention. The sound generated from the vibration device 3 is transmitted to the vibration member abutting on the vibration plate 2 by bone conduction. For this reason, the material of the vibrating member is not limited to a hard plate, but may be a flexible material. For example, it is a woven fabric, paper, plastic sheet, wallpaper, cloth or the like, and the shape can be a curtain shape or a curtain shape. The diaphragm 2 in the present invention may be a member made of such a flexible material as long as the member transmits vibration from the vibration device 3 and emits the sound.

FIGS. 4 to 5 are diagrams showing a second embodiment of the speaker device of the present invention.
This speaker device is an example in which the area where the end of the drive shaft 31 abuts on the diaphragm 2 is increased and the vibration device 3 is left standing on the diaphragm 2. The drive shaft 31 has a structure in which a disk-shaped flange is provided at one end of a substantially cylindrical main body. This flange is the end of the drive shaft 31, and the disk flat surface of the flange contacts the diaphragm 2. The configuration other than the drive shaft 31 is the same as the embodiment of FIGS. 1 to 3. In both cases of the first embodiment and the second embodiment, a recess corresponding to the end of the drive shaft 31 is formed on the diaphragm 2 and the end of the drive shaft 31 is fitted into the recess. Is also good. This facilitates positioning during assembly and improves workability.

6 to 7 are views showing a third embodiment of the speaker device of the present invention.
This speaker device is an example in which the area where the end of the drive shaft 31 abuts on the diaphragm 2 is increased to fix the vibrating device 3 to the diaphragm 2, and the auxiliary member 41 is provided on the frame 4. The auxiliary member 41 is configured such that the surface of the frame 4 opposite to the surface on which the drive shaft 31 of the vibration device 3 is provided when the vibration device 3 is left standing on the vibration plate 2 is parallel to the vibration plate 2. This is a member that allows the dimensions to be easily adjusted to be the same as the surface of the frame 4 on the side opposite to the diaphragm 2. The configuration other than the drive shaft 31, the frame 4, and the auxiliary member 41 is the same as that of the embodiment shown in FIGS. The detailed configuration of the drive shaft 31 is the same as that of the embodiment shown in FIGS.

  As described above, the present invention has been described based on the embodiments shown in the accompanying drawings. However, the present invention is not limited to the above embodiments, and appropriate design changes may be made within the intended scope of the present invention. It is possible to do.

  The speaker device of the present invention can efficiently transmit the vibration generated from the vibrating device to the diaphragm, secure the volume, and emit clear sound in a wide range, so that the speaker device can be used indoors, outdoors, large and small. It can be widely used as a speaker device for various applications.

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 2 Diaphragm 3 Vibration apparatus 4 Frame 5 Elastic body 31 Drive shaft 32 Gap 41 Auxiliary member

Claims (6)

A vibration device is abutted on one plane side of the diaphragm, a speaker device that radiates vibration transmitted from the vibration device as sound from the diaphragm,
The speaker device includes the diaphragm, the vibration device, a frame provided on the diaphragm so as to surround the vibration device, and a flat surface of the diaphragm sandwiching the frame and the vibration device. And an elastic body provided to face the
The frame is provided with a gap between the outer periphery of the vibration device,
The elastic body straddles the frame and the vibration device, and is fixed to the frame and the vibration device,
A speaker device, wherein the frame, the vibration device, and the elastic body are integrated.   2. The speaker device according to claim 1, wherein an entire surface of the vibration device and the frame on a side opposite to the plane of the diaphragm is fixed to the elastic body. 3. The outer peripheral shape of the vibrating device is substantially cylindrical,
The inner peripheral shape of the frame on the vibrating device side is a substantially cylindrical shape facing the outer peripheral shape of the vibrating device,
A drive shaft of the vibration device is provided at a center of the vibration device, and a radial gap between an inner periphery of the frame body and an outer periphery of the vibration device is constant in an entire circumferential direction. Item 7. The speaker device according to Item 1.   In the vibration device, an end of the drive shaft is in contact with the flat surface of the vibration plate so that a biasing force is generated in an axial direction of a drive shaft of the vibration device when the vibration device is operated. The speaker device according to claim 1, wherein:   The speaker device according to claim 1, wherein the speaker device includes another vibration member that is in contact with the diaphragm. The entire surface of the vibration device and the frame on the side opposite to the flat surface of the vibration plate is bonded and fixed to the elastic body,
The outer peripheral shape of the vibrating device is substantially cylindrical,
The inner peripheral shape of the frame on the vibrating device side is a substantially cylindrical shape facing the outer peripheral shape of the vibrating device,
A drive shaft of the vibration device is provided at the center of the vibration device, and a radial gap between an inner periphery of the frame and an outer periphery of the vibration device is constant in the entire circumferential direction,
In the vibration device, an end of the drive shaft is in contact with the flat surface of the vibration plate so that a biasing force is generated in an axial direction of a drive shaft of the vibration device when the vibration device is operated. The speaker device according to claim 1, wherein:

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