JP2016072753A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foldable speaker comprising a curved vibration surface.SOLUTION: A speaker is configured to form a valley part 12 by joining each side of one of a pair of support plates 31L, 31R and one of a pair of vibration surfaces 11L, 11R which can be opened and closed via a hinge part 32 which supports the plates and surfaces in a rotatable manner. The other sides each comprises a vibrator 1 supported by the support plates 31L, 31R; an actuator (drive part 2) which reciprocally drives the valley part 12 of the vibrator 1 along a depth direction of the valley part 12; and a link structure 4 which connects the actuator 2 and the pair of the support plates 31L, 31R. In the link structure 4, one ends of two arm members 41a, 41b are connected with each other in a rotatable manner, the actuator 2 is arranged in the connection part, and each of the other ends of the arm members 41a, 41b is supported by the support plates 31L, 31R.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foldable speaker.

Among various speakers that reproduce sound, some speakers are provided so as to be foldable for easy storage and transportation.
For example, the speaker disclosed in Patent Document 1 includes a diaphragm having a hollow structure made of a flexible material such as vinyl resin, and by vibrating in a state where a hollow portion of the diaphragm is filled with an object such as air, It can function as a speaker. Further, by taking out the object in the hollow portion, the diaphragm can be folded and wound to change the shape, the volume can be reduced, and a speaker that does not take up space can be obtained.
Patent Document 2 discloses a flexible electrostatic speaker. In this electrostatic speaker, even when the vibrating body is folded in half, the vibrations of the opposing vibrating bodies are in phase. Since the displacement can be made uniform and the generated sound is not canceled out, it can function well as a speaker.

Further, Patent Document 3 discloses a panel type speaker in which a plurality of flat diaphragms are attached to a flexible thin plate or sheet at an appropriate interval. This panel type speaker can be kept compact by stacking the diaphragm portions when not in use.
Patent Document 4 discloses a speaker including a speaker unit having a cone-shaped diaphragm accommodated in each of the divided housings and having the same radiation surface. In this speaker, the housings are connected to each other by hinges so that the angle formed by the irradiation surface of each speaker unit can be freely changed, and the slopes of each speaker unit can be closed and overlapped. And can be stored easily.

JP-A-11-113086 JP 2009-206758 A JP 2000-236595 A JP-A-8-126089 JP 2009-278523 A JP 2002-78079 A

  By the way, as disclosed in Patent Document 5 or Patent Document 6, a speaker constituted by a curved diaphragm is known. In this type of speaker, the speaker is disclosed in Patent Documents 1 to 4 described above. There was nothing that could be folded like various speakers.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a foldable speaker having a curved vibration surface.

  The speaker of the present invention joins a pair of support plates that can be opened and closed via a hinge portion that is rotatably supported, and one side portions of the pair of vibration surfaces to form a valley portion, and the other side portion is The vibration body supported by the support plate, the drive unit that reciprocates the valley of the vibration body along the depth direction of the valley, and the drive unit and the pair of support plates are coupled to each other. A link structure, wherein the link structure is configured such that one end portions of two arm members are rotatably connected to each other, the drive portion is provided at the connection portion, and the other end portion of the arm member is Each of them is structured to be rotatably supported by the support plate.

In this speaker, the other side portion of the pair of vibration surfaces is supported by a pair of support plates (respective support plates), while one side portion (valley portion) of these vibration surfaces. The bottom part of the support plate is moved forward and backward with the opening and closing operation of the pair of support plates by the link structure together with the drive unit, so that the vibration surface is curved and flat with the opening and closing operations of the pair of support plates. Can be deformed between. That is, when the pair of support plates is opened, a vibrating body in which one side portion (bottom portion of the valley portion) of the vibration surface moves forward and the vibration surface is deformed into a curved surface appears. In this state, the vibrating body can be vibrated by the drive unit, so that a sound can be produced. Thus, when the pair of support plates are opened, it can function as a speaker. In addition, when the pair of support plates are closed, one side of the vibration surface (bottom of the valley) moves backward to deform the vibration surface into a flat shape, so that the vibration body is accommodated between the pair of support plates. Can be made. Thus, since the speaker can be folded thinly, it can be easily carried and stored.
In the speaker of the present invention, the curvature of the curved vibration surface can be changed by changing the opening angle of the pair of support plates. Thereby, the spread of sound (directional characteristic) can be changed according to the curvature of the vibration surface.

In the speaker of the present invention, the pair of support plates are deployed so as to close a space behind the vibrating body formed when the pair of support plates is opened, and the pair of support plates are closed. It is preferable that a closing plate which is reduced in some cases is provided.
By closing the space behind the vibrating body with the closing plate, it is possible to prevent sound waves from being released into the space behind the vibrating body, so that sound can be efficiently emitted from the front surface of the vibrating body.

  According to the present invention, a speaker having a curved vibration surface can be folded thinly.

It is a perspective view which shows the speaker of 1st Embodiment of this invention, and shows the case where a pair of support plate is open. It is a perspective view which shows the case where a pair of support plate of the speaker shown in FIG. 1 is closed. It is a top view of the speaker shown in FIG. 1, (a) shows a case where a pair of support plates are opened, and (b) shows a case where a pair of support plates are closed. It is a perspective view which shows the speaker of 2nd Embodiment of this invention. It is a top view which shows the speaker of 3rd Embodiment of this invention.

Hereinafter, embodiments of a speaker of the present invention will be described with reference to the drawings.
1 to 3 show a speaker according to a first embodiment of the present invention, which is configured in a book shape that can be opened and closed like a book.
The speaker 100 according to the first embodiment includes a vibrating body 1, an actuator (driving unit) 2 that drives the vibrating body 1 to reciprocate, a pair of support plates 31L and 31R that support the vibrating body 1 and the actuator 2, A link structure 4 that connects the actuator 2 and the pair of support plates 31L and 31R is provided.

As shown in FIGS. 1 to 3, the pair of support plates 31 </ b> L and 31 </ b> R are provided in a foldable shape that can be opened and closed via a hinge portion 32 that is rotatably supported. One side portion of the pair of support plates 31L and 31R is configured to be rotatably provided by the hinge portion 32. As a result, the pair of support plates 31L and 31R are in a state where the other side portions are combined (FIGS. 2 and 3B) and a state where the other side portions are separated (FIGS. 1 and 3A). )) Can be opened and closed. The former is referred to as a state in which the pair of support plates 31L, 31R is closed, and the latter is referred to as a state in which the pair of support plates 31L, 31R is opened.
The hinge portion 32 may have a structure that is rotatable by attaching a member such as a hinge to the pair of support plates 31L and 31R, or a support that can rotate one side of the pair of support plates 31L and 31R. You may form in a structure.

  The pair of support plates 31L and 31R and the actuator 2 are connected by a pair of link structures 4 provided at the upper and lower ends of the support plates 31L and 31R as shown in FIGS. Is supported so as to move forward and backward in a direction away from or approaching the hinge portion 32 in accordance with the opening / closing operation of the pair of support plates 31L and 31R. The configuration of the link structure 4 will be described in detail using the upper surface portion shown in FIG.

  The link structure 4 includes two arm members 41a and 41b that connect the support plates 31L and 31R. Both arm members 41a and 41b are provided in the same length and are arranged symmetrically. Then, one end of the arm members 41a and 41b in the length direction is rotatably connected by the support shaft 42c, and the actuator 2 is provided at the connection, and the other ends of the arm members 41a and 41b are respectively supported. The shafts 42a and 42b are rotatably supported on the upper and lower ends of both support plates 31L and 31R. The connecting portion of the arm members 41 a and 41 b is attached to the guide member 43 via the support shaft 42 c, and the actuator 2 is fixed to the guide member 43. As a result, the actuator 2 is moved forward and backward in a direction away from or approaching the hinge portion 32 in accordance with the opening / closing operation of the support plates 31L and 31R. That is, as shown by a two-dot chain line in FIG. 3A, when the other side portions (tip portions) of the support plates 31L and 31R are brought close to each other and the support plates 31L and 31R are closed in the closing direction, With the closing operation, both arm members 41 a and 41 b are folded from the support shaft 42 c, and the actuator 2 moves backward together with the support shaft 42 c and the guide member 43 in a direction approaching the hinge portion 32. On the other hand, if the other side portions of the support plates 31L and 31R are separated from each other and the support plates 31L and 31R are opened in the opening direction, the arm members 41a and 41b are opened along with the opening operation, and the support shaft 42c and the guide are opened. The actuator 2 protrudes together with the member 43 and moves forward in a direction away from the hinge portion 32.

  As shown in FIGS. 2 and 3 (b), when the tip portions of the support plates 31L and 31R are completely closed together, the pair of arm members 41a and 41b are also completely folded and arranged in parallel. It will be in the state. On the other hand, as shown in FIG. 1 and FIG. 3A, the pair of support plates 31L and 31R are the largest at the positions where the pair of arm members 41a and 41b are arranged so as to be aligned on one straight line. Opened.

The vibrating body 1 has a shape in which a valley portion 12 is formed by joining one side portions of a pair of vibration surfaces 11L and 11R provided in a rectangular shape. The other side portions of the vibration surfaces 11L and 11R are swingably supported on the other side portions of the pair of support plates 31L and 31R, respectively. Further, the joint portion 13 of the vibration surfaces 11L and 11R is supported by the guide member 43, and the bottom portion of the trough portion 12 is guided by the link structure 4 along with the opening / closing operation of the pair of support plates 31L and 31R. It moves forward and backward in the depth direction of 12.
Thereby, as shown in FIG. 3A, the vibration surfaces 11L and 11R of the vibrating body 1 have the bottoms of the actuator 2 and the valley 12 of the vibrating body 1 as the pair of support plates 31L and 31R open. By moving forward in a direction away from the hinge portion 32, it is deformed into a curved surface (vertically divided cylinder), and as shown in FIG. 3 (b), the actuator 2 moves along with the closing operation of the pair of support plates 31L and 31R. And the bottom part of the trough part 12 of the vibrating body 1 is deformed into a planar shape by moving backward in the direction approaching the hinge part 32, and is accommodated between both the support plates 31L and 31R.

The vibration surfaces 11L and 11R when the pair of support plates 31L and 31R are opened will be described in detail. The vibration surfaces 11L and 11R are curved in one direction (the circumferential direction of the vertically divided cylindrical vibration surface: the lateral direction) A straight line is formed in a direction orthogonal to the one direction (the vertical direction of the vertically split cylindrical vibration surface). The pair of vibration surfaces 11L and 11R are arranged in parallel so that the convex direction faces the same surface side, and adjacent side portions are circumferential directions of the vertically split cylindrical vibration surfaces 11L and 11R. Are joined in a state in which the tangential direction is common in the cross section along the line. The joint portion 13 between the two vibration surfaces 11L and 11R is formed, for example, in a band plate shape by bonding one side portion of both the vibration surfaces 11L and 11R. And along this junction part 13, the linear trough part 12 along the vertical direction is formed between both vibration surface 11L, 11R.
In addition, the above-described vertically-divided cylindrical shape is a curved surface shape obtained by cutting a part of a cylindrical surface vertically, and the side portion of the above-described vibration surface is a vertically-divided cylindrical vibration surface. The side of the cylindrical surface in the curved direction.

Note that these vertically split cylindrical vibration surfaces 11L and 11R do not necessarily have to be a single circular arc surface, and have a plurality of continuous curvatures, and a cross section along the circumferential direction of the vertically split cylindrical shape is a parabolic shape or a spline. It is possible to employ a curved line having a constant or continuously changing curvature, a rectangular cylindrical surface, or a stepped shape having a plurality of steps.
Further, in order to obtain a uniform reproduced sound, it is preferable to form both the vibration surfaces 11L and 11R symmetrically with respect to the common tangent of the joint portion 13. However, in the present invention, line symmetry is not necessarily required.

  The material of the vibrating body 1 is not limited, and a material having flexibility and elasticity, such as a synthetic resin generally used as a diaphragm of a speaker, paper, or the like, can be used. For example, it is formed of a film made of a synthetic resin such as polypropylene or polyester.

  The actuator 2 vibrates the valley portion 12 of the vibrating body 1 in the depth direction, and for example, a voice coil motor is used. In the present embodiment, the actuator 2 includes a planar coil-shaped conductor pattern corresponding to a voice coil formed at the joint 13 of the vibrating body 1 and a magnet mechanism fixed to the guide member 43, for example. . Further, as described above, the joint portion 13 of the vibrating body 1 is supported by the guide member 43 via the damper, whereby the bottom portion of the valley portion 12 is in the depth direction of the valley portion 12 with respect to the guide member 43. It can be reciprocated along In addition, the thing of the material used for a general dynamic speaker can be applied to a damper.

  As described above, the speaker 100 configured in this manner is in a state in which the other side portion of the pair of vibration surfaces 11L and 11R is swingably supported on the other end side of the pair of support plates 31L and 31R. On the other hand, since one side part (bottom part of the trough part 12) of a pair of vibration surface 11L, 11R moves forwards / backwards with opening / closing operation | movement of a pair of support plates 31L, 31R, these pair The vibration surfaces 11L and 11R can be deformed between a curved surface shape and a planar shape in accordance with the opening / closing operation of the support plates 31L and 31R. That is, when the pair of support plates 31L and 31R are opened, the bottom of the valley 12 of the vibrating body 1 (one side of the vibration surfaces 11L and 11R) moves forward and the vibration surfaces 11L and 11R are deformed into curved surfaces. In this state, the vibrating body 1 can be vibrated by the actuator 2 so that sound can be produced. In this way, when the pair of support plates 31L and 31R are opened, the vibrating body 1 can function as a speaker. It can be done.

Specifically, when the distal ends of the pair of support plates 31L and 31R are separated and opened, when a drive current corresponding to an audio signal is passed through the conductor pattern formed on the vibrator 1, the drive current is generated. Due to the change in magnetic flux and the magnetic field generated by the magnet mechanism fixed to the guide member 43, a driving force corresponding to the driving current acts on the conductor pattern, and vibrates along the depth direction of the valley portion 12 of the vibrator 1. Reproduced sound can be emitted from the surfaces of the vibration surfaces 11L and 11R.
On the other hand, when the tip portions of the pair of support plates 31L and 31R are closed together, the joint portion 13 (one side portion of the vibration surfaces 11L and 11R) of the vibrating body 1 moves backward to cause the vibration surfaces 11L and 11R to move. Since it deform | transforms into planar shape, the vibrating body 1 can be accommodated between a pair of support plates 31L and 31R, and a speaker can be folded thinly. Therefore, the speaker 100 can be easily carried and stored.

  Further, in this speaker 100, although not shown, a setting member for setting and displaying the opening angle of the pair of support plates 31L and 31R is provided. By changing the opening angle, the curved surface-like vibration is provided. The curvatures of the surfaces 11L and 11R can be changed. Thereby, the spread of sound (directional characteristic) can be changed depending on the curvature of the vibration surfaces 11L and 11R. Specifically, as the setting member, a configuration having a stopper that fixes the opening angle of the pair of support plates 31L and 31R and a display unit that displays directional characteristics or a wavefront type corresponding to the fixing angle is used. be able to. For example, when the opening angle of the pair of support plates 31L and 31R is fixed at a relatively narrow angle of about 90 °, the curvature of the vibration surfaces 11L and 11R becomes small, so that a wavefront like a cylindrical wave can be generated. And directivity can be widened. On the other hand, when the opening angle of the pair of support plates 31L and 31R is fixed to about 120 °, which is relatively wide, the curvature of the vibration surfaces 11L and 11R becomes large, so that a wavefront like a plane wave can be generated and directed. Can be narrowed.

  Such a book-type speaker 100 can be used alone as a speaker. For example, it is used between a base (keyboard unit) and a cover (display unit) of a notebook computer or a base and cover of a keyboard instrument. It can be used by being incorporated in a structural part having an open / close structure such as between.

  4 and 5 show a speaker according to another embodiment. In these embodiments, the same components as those of the first embodiment are used, such as the vibrating body. Therefore, in each drawing, the same reference numerals are assigned to the common elements as in the first embodiment, and the description is simplified.

  The speaker 200 of the second embodiment shown in FIG. 4 is deployed so as to close the space 15 behind the vibrating body 1 formed when the pair of support plates 31L and 31R are opened, as indicated by a two-dot chain line. The closing plate 5 is provided. The closing plate 5 is formed in a fan shape as a whole so as to be bridged between the support plates 31L and 31R at the upper and lower ends of the pair of support plates 31L and 31R. A pair is provided so as to close the space 15. Further, the closing plate 5 is folded in a bellows shape and contracted when the pair of support plates 31L and 31R are closed. Then, the space 15 behind the vibrating body 1 can be closed at any opening angle of the pair of support plates 31L and 31R by being expanded from the folded state with the opening operation of the support plates 31L and 31R. It is like that. In this manner, by covering the space 15 behind the vibrating body 1 with the closing plate 5, it is possible to prevent sound waves from being released into the space 15 behind the vibrating body 1. Therefore, sound can be efficiently emitted from the front surface of the vibrating body 1.

In addition, unlike the said 2nd Embodiment, it is not necessary to provide the closing plate 5 integrally in the support plates 31L and 31R of the speaker 200, and it is a lid-shaped closing plate in the state which opened a pair of support plates 31L and 31R. May be put on the upper and lower ends of the pair of support plates 31L and 31R.
In the embodiment shown in FIG. 4, the closing plate 5 is provided on the upper and lower ends of the pair of support plates 31L and 31R. However, the speaker 200 is placed on a plane such as a desk top, When the space at the lower end portion of 31R is closed, the closing plate 5 may be provided only at the upper end portions of the pair of support plates 31L and 31R.

FIG. 5 shows a speaker of the third embodiment. The speaker 300 is configured by combining two speakers of the first embodiment, and can process a two-channel audio signal.
That is, the speaker 100 of the first embodiment includes a vibrating body 1 formed by a pair of support plates 31L and 31R that can be opened and closed via a hinge portion 32 that is rotatably supported, and a pair of vibration surfaces 11L and 11R. The structure includes an actuator 2, and one sound signal can be processed by one vibration body 1. On the other hand, in the speaker 300 of the third embodiment, three support plates 31L, 31R, and 31C are provided so as to be openable and closable via the hinge portion 32, and are respectively provided between the support plates 31L, 31R, and 31C. A vibrating body 1 and an actuator 2 are provided. The central support plate 31C is shared with the support plates 31L and 31R on both sides so as to support the respective vibrating bodies 1. Further, the structure of the link structure 4 and the like is also provided by sharing the central support plate 31C. Thereby, in the speaker 300 of 3rd Embodiment, two audio | voice signals can be processed now by each vibrating body 1 on either side.
As described above, the speaker 100 according to the first embodiment performs one-channel monaural reproduction, whereas the speaker 300 according to the third embodiment can perform two-channel stereo reproduction.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, a piezoelectric element or the like may be used in addition to a voice coil motor as the drive unit that vibrates the vibrating body.
In addition, as shown in FIG. 1, the speaker of the present invention is not a structure in which the pair of support plates 31L and 31R open and close to the left and right and the vibrating body 1 is bent in the left and right directions. The diaphragm 1 may be configured to be bent in the vertical direction. Even in the case where the pair of support plates 31L and 31R is configured to open and close up and down, the setting member for setting and displaying the opening angle of the pair of support plates 31L and 31R and the space behind the vibrating body are closed. A structure in which a closing plate is provided may be used, and a structure in which a member that serves both as a setting member and a closing plate may be provided.
Moreover, even if the support plates 31L and 31R are opened and closed left and right like the speaker 100 of FIG. 1, the installation and use modes are not limited, and the support plates 31L and 31R are opened and closed up and down. Can be installed and used.

  DESCRIPTION OF SYMBOLS 1 ... Vibration body, 2 ... Actuator (drive part), 4 ... Link structure, 5 ... Connection board, 11L, 11R ... Vibration surface, 12 ... Valley part, 13 ... Joint part, 15 ... Space, 31L, 31R, 31C ... Support plate, 32 ... hinge part, 41a, 41b ... arm member, 42a, 42b, 42c ... spindle, 43 ... guide member, 100, 200, 300 ... speaker

Claims (2)

A pair of support plates that can be opened and closed via a hinge portion that is rotatably supported;
A vibrating body in which one side of a pair of vibration surfaces is joined to form a trough, and the other side is supported by the support plate, respectively.
A drive unit that reciprocates the valley of the vibrator along the depth direction of the valley; and
A link structure connecting the drive unit and the pair of support plates;
In the link structure, one end portions of two arm members are rotatably connected to each other, the driving portion is provided at the connecting portion, and the other end portions of the arm members are respectively rotated to the support plate. A loudspeaker characterized in that the structure is supported.   A closing plate that expands on the pair of support plates so as to close a space behind the vibrating body that is formed when the pair of support plates is opened, and is reduced when the pair of support plates is closed. The speaker according to claim 1, wherein the speaker is provided.

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