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JP2013102408

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DESCRIPTION JP2013102408
Abstract: A folding protective cover for an iPad can not reproduce sufficient acoustic effects
because the diaphragm is divided into four. SOLUTION: Sufficient acoustic characteristics can be
reproduced by using a rigid and lightweight paper quality diaphragm using a honeycomb
material as a diaphragm.
Cover speaker system for iPad
[0001]
The present invention relates to a flexural vibration type actuator assembly for use in a
distributed vibration type flexural vibration type panel speaker and a flexural vibration type
panel speaker provided with a flexural vibration type actuator assembly.
[0002]
Conventionally, a flexural vibration type panel speaker is known for acoustic vibration.
In a conventional flexural vibration type panel speaker, an actuator for exciting the main
diaphragm is brought into surface contact with a flat panel-like main diaphragm, and the
vibration from the actuator is transmitted to the main diaphragm, and the flexural vibration of
the main diaphragm It is a distributed vibration type speaker that sounds by using. Further, in
order to improve the reproducibility of the sound emitted from the main diaphragm, it is general
to adhere the contact surface of the actuator and the main diaphragm with an adhesive or the
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like.
[0003]
Furthermore, the flexural vibration type panel speaker can utilize the main diaphragm itself as a
housing of an apparatus in which the speaker is mounted. Therefore, since a space for piston
movement of the cone-like cone, which is required in the cone type speaker, is not necessary,
there is an advantage that the speaker can be thinned by adopting the flexural vibration type
panel speaker. Therefore, a flexible vibration type panel speaker is widely used for a device
which can not have a large space for disposing the speaker.
[0004]
Moreover, the function as a protective cover and a speaker can be shared by using the foldable
protective cover for iPad for a diaphragm.
[0005]
However, the foldable protective cover for the iPad can not reproduce sufficient acoustic effects
because the diaphragm is divided into four.
[0006]
The purpose of the present invention is to create a speaker system that uses a foldable protective
cover for iPad as a diaphragm to reproduce sufficient acoustic effects.
[0007]
In order to solve the above problems, it is sufficient to use a rigid, lightweight paper quality
diaphragm using a honeycomb material as the second diaphragm as viewed from above among
the diaphragms divided into four. Acoustic characteristics can be reproduced.
[0008]
Also, by using two deflection vibration type actuators at both ends of the diaphragm for Lch and
Rch, the stereo effect can be reproduced with only one diaphragm.
[0009]
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Specifically, it can reproduce sufficient sound pressure, frequency characteristics, and stereo
effects as a near-field speaker.
[0010]
Drawing using the speaker as an iPad cover Drawing using the speaker as an iPad cover Drawing
without the speaker cover Drawing using the speaker stand Using the speaker (front) Drawing
using the speaker stand (Back) Drawing using this speaker using a dedicated stand (back)
(without speaker cover) Drawing folded into a triangle using this speaker as a stand for iPad
[0011]
Hereinafter, an embodiment to which the flexural vibration type speaker of the present invention
is applied will be described with reference to the drawings.
[0012]
FIG. 1 shows a cover speaker 2 attached to the iPad 1 as a cover.
A dedicated stand 4 for the cover speaker is attached to the cover 2 by a magnet.
[0013]
FIG. 2 shows the inside of the cover speaker 2 with the speaker case 3 removed.
6 is a rigid, lightweight paper quality diaphragm using a honeycomb material, and an actuator
(for Rch) 5a and an actuator (for Lch) 5b are mounted on both left and right ends to make the
diaphragm 6 a flexural vibration type panel speaker Play the sound.
7 is a battery for charging, and 8 is a printed circuit board such as an amplifier circuit and a
wireless circuit.
9 is a cover board divided into three.
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[0014]
FIG. 3 is a perspective view of the front implemented as a cover speaker using a dedicated stand.
FIG. 4 is a perspective view of the back implemented as a cover speaker using a dedicated stand.
FIG. 5 is a diagram in which the speaker case is removed from FIG.
[0015]
An embodiment of the cover speaker will be described with reference to FIG.
The sound source for reproducing the cover speaker 2 is transferred to the receiver 8 of the
cover speaker according to the wireless standard Bluetooth from the sound source iPad 1, and
the built-in amplifier 8 vibrates the diaphragm 6 by the actuator 5a and the actuator 5b to
reproduce sound. .
In that case, the cover board 9 divided into three pieces is also connected via a cloth, so it works
as a diaphragm, so there is also a baffle effect and sufficient volume and high-quality sound can
be reproduced as near-field spica. Also, by attaching two actuators at both ends, stereo playback
becomes possible.
[0016]
FIG. 6 shows an example in which the cover speaker 2 is folded in a triangle and installed as a
stand of an iPad. In this state, you can play the audio while listening to the video of iPad.
[0017]
1 iPad 2 Cover Speaker 3 Speaker Case 4 Dedicated Stand 5a Actuator (for Rch) 5b Actuator (for
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Lch) 6 Diaphragm 7 Charging Battery 8 Printed Circuit Board (Amplifier Circuit and Wireless
Circuit) 9 Cover Board
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