JP2005286702

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DESCRIPTION JP2005286702
PROBLEM TO BE SOLVED: To obtain a good stereo effect by emitting sounds from two speakers
in directions away from each other at a sufficient volume without causing a device body to be in
a complicated shape and causing no discomfort when carried. SOLUTION: The mutually
approaching sides of first and second speakers 21 and 22 arranged side by side in a second case
2 are covered with a speaker covering portion 23 and correspond to the first and second
speakers 21 and 22. First and second sound emission holes 24 and 25 are provided from the
portion toward both sides of the speaker covering portion 23 of the first and second speakers 21
and 22 which are separated from each other. Therefore, it is possible to reduce the mixing of the
sounds from the first and second speakers 21 and 22 and to make the first and second sound
emission holes 24 and 25 sufficiently large to make the first and second speakers When the
volume of the sound emitted from 21 and 22 can be sufficiently secured, a good stereo effect can
be obtained, and the shape of the second case 2 is not complicated, and when held by hand Can
be carried well. [Selected figure] Figure 5
Portable electronic devices
[0001]
The present invention relates to portable electronic devices such as portable telephones and
portable acoustic devices.
[0002]
For example, mobile phones are becoming more multifunctional, and in addition to telephone
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functions, those equipped with acoustic functions have been developed.
In order to receive music information and reproduce music, the mobile phone provided with such
an audio function is provided with a receiver consisting of a speaker for receiving speech in the
main body of the device, and further provided with two speakers. There is a system configured to
allow a speaker to listen to a musical tone in a stereo sense. Unexamined-Japanese-Patent No.
2003-152837
[0003]
In the mobile phone of Patent Document 1, the first and second speakers are arranged side by
side in the device body, and an acoustic space is formed between the sound emitting surface of
each of the first and second speakers and the device body. In this structure, the rising portions
are respectively formed on the mutually separated side portions of the first and second speakers
in the device body, and the sound emission holes are respectively provided in the inclined
portions located on the outer surface side of the rising portions. It has become.
[0004]
However, in the conventional mobile phone as described above, the apparatus main body forms
the rising portions on the both sides of the first and second speakers which are separated from
each other, and the sound emitting surfaces and the devices of the first and second speakers are
provided. There is a problem that the sound from the first and second speakers can not be
sufficiently emitted from the sound emission hole of the rising portion unless an acoustic space is
formed between the main body and the main body. There is also a problem that the shape of the
device main body becomes complicated because the upper portion is formed.
[0005]
In particular, since the sound emission hole is provided in the inclined portion of the elevating
portion, the sound from the first and second speakers is sufficient if the elevating portion is
formed large and the hole diameter of the sound emission hole is not formed large. There is also
a disadvantage that it is not possible to emit noise at a certain volume.
In addition, if the bulging portion is enlarged to secure a sufficient volume, the size of the device
body is increased, and the gripping portion not only causes discomfort when the device body is
held by hand, but the bulging portion at the time of carrying There are also problems such as
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being in the way.
[0006]
The problem to be solved by the present invention is that the device main body does not have a
complicated shape and does not give a sense of incongruity at the time of carrying, and sound
from the two speakers is emitted in a direction away from each other at a sufficient volume. It is
to provide a portable electronic device capable of obtaining a stereo effect.
[0007]
The present invention comprises the following components in order to solve the abovementioned problems.
In addition, the reference numerals etc. of the drawing attached to each element explained in the
section of each embodiment mentioned later are attached to each component with a parenthesis.
[0008]
The invention according to claim 1 is a mobile phone in which the first speaker (21) and the
second speaker (22) are arranged side by side in the device body (second case 2) as shown in
FIGS. Type electronic device, comprising: a speaker covering portion (23) which covers the sound
emitting surface (21a, 22a) side of the first and second speakers on the side where the first and
second speakers approach each other; 1, first and second sound emission provided toward the
both sides of the speaker covering portion positioned on the side where the first and second
speakers are separated from the portion corresponding to the sound emitting surface of the
second speaker It is a portable electronic device characterized by having holes (24, 25).
[0009]
According to the second aspect of the present invention, as shown in FIGS. 1 to 13, the first and
second sound emission holes (24, 25) are the respective ones of the first and second speakers
(21, 22). The first and second speakers are formed obliquely from the portion corresponding to
the sound emitting surface (21a, 22a) to both sides of the device body (second case 2) located on
the side where they are separated from each other The portable electronic device according to
claim 1, characterized in that
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[0010]
The invention according to claim 3 is, as shown in FIGS. 1 to 10, formed by a pair of partition
walls (29, 29) between the first speaker (21) and the second speaker (22). The portable
electronic device according to claim 1 or 2, wherein an air space (30) is provided.
[0011]
The invention according to claim 4 is, as shown in FIGS. 1 to 13, when the device body (second
case 2) is disposed on the mounting surface (26), the device body and the speaker covering
portion (23) is a sound emission space for guiding the sound emitted from the first sound
emission hole (24) and the second sound emission hole (25) respectively to both sides of the
device body The portable electronic device according to any one of claims 1 to 3, wherein the
first and second sound emitting spaces 27, 28 or the sound emitting space 41) are formed.
[0012]
According to a fifth aspect of the present invention, as shown in FIGS. 1 to 10, the sound emitting
space (first and second sound emitting spaces 27 and 28) includes the device body (second case
2) and the speaker. The portable electronic device according to claim 4, wherein the portable
electronic device is formed by a height difference with the covering portion (23).
[0013]
According to the sixth aspect of the present invention, as shown in FIGS. 10 to 13, the sound
emission space (41) is formed by a projection (40) disposed in the vicinity of the speaker cover
(23). It is a portable electronic device of Claim 4 characterized by the above-mentioned.
[0014]
According to the invention as set forth in claim 7, as shown in FIG. 4 and FIGS. 10 to 13, a part
(the second case 2) in which the projection (40) is insertably and detachably housed 5. The
portable electronic device according to claim 4, wherein the portable electronic device is
provided on a cover member (opening and closing lid 17) which covers the memory card 15) so
as to be openable and closable.
[0015]
According to the first aspect of the present invention, each sound emission surface of the first
and second speakers on the side where the first speaker and the second speaker arranged side by
side in the device body approach each other is the speaker cover portion. The first and second
sound emission holes are formed toward the both sides of the speaker covering portion located
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on the side where the first and second speakers are separated from the portions corresponding
to the sound emission surfaces of the first and second speakers, as well as being covered. Since
the sound from the first and second speakers can be emitted away from each other, the mixing of
the sounds from the first and second speakers can be reduced, and Since the first and second
sound emission holes can be formed sufficiently large, the volume emitted from the first and
second speakers can be sufficiently ensured, whereby the stereo effect can be obtained favorably.
As in the conventional example. There is no need to provide the Ri portion, not complicated
shape of the main body, there is no discomfort when held in the hand of the apparatus body, it is
possible to satisfactorily carry.
[0016]
According to the second aspect of the present invention, the first and second sound emitting
holes are located on the side where the first and second speakers are separated from the portions
corresponding to the sound emitting surfaces of the first and second speakers. Since the device is
formed obliquely to both sides of the device body, the sounds from the first and second speakers
are directed toward the direction in which the first and second speakers are separated from each
other by the first and second sound emission holes. The sound can be emitted obliquely, whereby
the directivity of the sound emitted from the first and second sound emission holes is good, and
the mixing of the sound from the first and second speakers is significantly reduced. Therefore, it
is possible to obtain an even higher stereo effect.
[0017]
According to the third aspect of the present invention, the air space formed by the pair of
partition walls is provided between the first speaker and the second speaker, so that the first
speaker and the second speaker can be brought closer to each other. It is possible to prevent the
sound of the first speaker and the sound of the second speaker from interfering with each other
by the air space formed by the pair of partition walls provided between them even if the Both
sounds of the speakers can be heard well, and this also makes it possible to obtain a high stereo
effect.
[0018]
According to the fourth aspect of the present invention, when the device body is disposed on the
mounting surface, the device body and the speaker cover are emitted from the first sound
emission hole and the second sound emission hole. By forming a sound emission space for
guiding the sound toward both sides of the device body, the first sound emission hole and the
second sound emission hole are blocked even if the device body is disposed on the mounting
surface The sound emitted from the first sound emission hole and the second sound emission
hole can be emitted to the outside from both sides of the device body by the sound emission
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space, whereby the device body can be placed on the mounting surface Even in the state of being
disposed on the upper side, since the sounds of the first and second speakers can be reliably
emitted to the outside of the device body, the stereo effect can be favorably obtained.
[0019]
According to the fifth aspect of the present invention, the sound emitting space is formed by the
height difference between the device main body and the speaker cover portion, so that the simple
structure only causes the device main body and the speaker cover portion to have a height
difference. Therefore, when the device body is disposed on the mounting surface, a sound
emitting space can be formed, so that the device body does not have a complicated shape even if
the speaker cover is integrally formed on the device body. The device body having the speaker
cover can be easily manufactured.
In this case, the height difference between the device body and the speaker cover portion may be
a step between the device body and the speaker cover portion, or a slope such as an inclined
surface or a curved surface continuous with the device body and the speaker cover portion. It
may be.
[0020]
According to the sixth aspect of the present invention, since the sound emission space is formed
by the projection disposed in the vicinity of the speaker cover, the projection can be simply
disposed in the vicinity of the speaker cover. When the device body is arranged on the mounting
surface, a sound emitting space can be formed, whereby a good stereo effect can be obtained
even in a state where the device body is arranged on the mounting surface.
[0021]
According to the seventh aspect of the present invention, the projection forming the sound
emission space is provided by being provided in the cover member which covers the part housed
in the device body so as to be able to open and close. Even if it is provided, since the projection
may be formed on a cover member different from the device body, the projection can be easily
formed, and the shape of the device body is not complicated, and the device body can be easily
formed. It can be manufactured.
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In this case, in particular, the projection can also serve as a handle of the cover member, so that
the opening and closing operation of the cover member can be facilitated, whereby a userfriendly product can be obtained.
[0022]
Embodiment 1 Hereinafter, Embodiment 1 in which the portable electronic device of the present
invention is applied to a mobile phone will be described with reference to FIGS. 1 to 5.
1 is a front view showing a portable telephone according to the present invention, FIG. 2 is a side
view thereof, FIG. 3 is a rear view of FIG. 1, FIG. 4 is an enlarged sectional view in the arrow AA
of FIG. FIG. 5 is a cross-sectional view showing the main part of 4 in principle.
This mobile phone comprises a first case 1 and a second case 2, and the end portions of the first
and second cases 1 and 2 are rotatably connected by a hinge 3, and the hinge 3 is used as a
center When the first and second cases 1 and 2 are rotated and closed, the first and second cases
1 and 2 are configured to overlap each other.
[0023]
In this case, the first case 1 is formed in an elongated box shape that can be held by one hand.
As shown in FIG. 1, the main display portion 4 is provided over substantially the entire area of
the front of the first case 1, ie, the front (left side in FIG. 2) facing the second case 2. On the
upper end side of the main display unit 4, a receiver unit 5 composed of a small speaker for
emitting a receiving sound is provided.
Further, as shown in FIG. 3, the sub display unit 6 is provided at substantially the center of the
rear surface (right side surface in FIG. 2) of the first case 1, and the front side (lower side in FIG.
3) The camera unit 7 is provided in the camera.
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[0024]
The main display unit 4 and the sub display unit 6 are flat display devices such as a liquid crystal
display device and an EL display device (electroluminescence display device), and selectively
display various information such as telephone information and time information. Is configured
as.
In this case, the main display portion 4 is formed in a vertically long rectangular shape having
substantially the same width as the horizontal width of the first case 1, and the sub display
portion 6 is formed in a circular shape.
In addition, the main display unit 4 is formed to have a display area larger than that of the sub
display unit 6, thereby displaying more information than the sub display unit 6.
[0025]
On the other hand, as shown in FIG. 4, the second case 2 has a structure in which the upper case
2 a and the lower case 2 b are overlapped and joined, and the whole is formed in a box shape
having substantially the same size as the first case 1. There is.
As shown in FIG. 1, a multi-guide button 8 and a key input unit 9 are provided on the front face
of the second case 2, that is, on the front face (left side in FIG. 2) facing the first case 1. A
microphone unit 10 is provided on the lower end side.
The multi guide button 8 is a button for selecting and executing many functions such as a mode
switching function for switching various modes, a cursor function, and a shift function.
The key input unit 9 includes character keys such as numeric keys, and is configured to input
various information such as a telephone number and a message.
[0026]
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As shown in FIG. 3, a battery lid 11 for covering and protecting a battery pack (not shown) is
detachably attached to a substantially central portion of the back surface (right side surface in
FIG. 2) of the second case 2 On the upper side, a stereo speaker unit 12 to be described later is
provided.
Further, as shown in FIG. 4, a shield plate 13 is disposed in the second case 2 so as to correspond
to the lower side of the key input unit 9. The substrate 14 is disposed.
Below the circuit board 14, a card storage unit 16 is provided for storing a memory card 15 such
as an SD card in a removable manner. The card storage portion 16 is provided with an insertion
port (not shown) on the back surface (upper surface in FIG. 3) located at the upper end portion
(end portion on the hinge portion 3 side) of the second case 2. As shown in FIG. 3, an open /
close lid 17 is detachably attached to the housing.
[0027]
In addition, as shown in FIG. 4, speaker connectors 18 and 18 are disposed on both sides of the
card storage unit 16 in the second case 2 in a state of being electrically connected to the circuit
board 14, respectively. A stereo speaker unit 12 is provided below the housing portion 16 and
the speaker connectors 18 on both sides thereof. An antenna 19 is disposed on the left side of
the stereo speaker unit 12 so as to be able to protrude and retract toward the upper end side of
the second case 2 shown in FIG. 3, and on the right side of the stereo speaker unit 12, the
incoming call of the telephone is vibrated The vibrator 20 which communicates by is arranged.
[0028]
By the way, as shown in FIG. 4, the stereo speaker unit 12 provided on the back surface side (the
lower surface side in FIG. 4) of the second case 2 includes the first speaker 21 and the second
speaker 22. The first and second speakers 21 and 22 are positioned below the card storage unit
16 and the speaker connectors 18 and 18 on both sides thereof, and the respective sound
emitting surfaces 21a and 22a are directed downward. As shown in FIG. 3, they are arranged side
by side in the width direction of the second case 2, and are electrically connected to the speaker
connectors 18, 18 in this state.
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[0029]
In the lower surface of the second case 2 in the stereo speaker unit 12, that is, the lower case 2b
of the second case 2, on the side where the first speaker 21 and the second speaker 22 approach
each other as shown in FIG. A speaker cover 23 is provided to cover the side of the sound
emitting surfaces 21a and 22a of the first and second speakers 21 and 22 located, and the sound
emitting surfaces 21a and 22a of the first and second speakers 21 and 22 are provided. First and
second sound emitting holes 24 and 25 are provided on both sides of the speaker covering
portion 23 located on the side where the first speaker 21 and the second speaker 22 are
separated from each other from the portion corresponding to.
[0030]
In this case, as shown in FIG. 4, the speaker covering portion 23 is integrally formed with the
lower case 2 b in a state of projecting downward with respect to the lower surface of the lower
case 2 b of the second case 2. As shown in FIG. 5 and FIG. 5, with the sound emitting surfaces
21a and 22a of the portions of the first and second speakers 21 and 22 approaching each other,
both sides of the first and second speakers 21 and 22 which are separated from each other It is
configured to expose the portion substantially in the shape of a fan.
In addition, as shown in FIG. 4, the first and second sound emission holes 24 and 25 are provided
between the lower case 2 b of the second case 2 and the speaker cover 23, and the first speaker
21 and the second speaker 22. Are formed obliquely downward toward the both sides in the
direction away from each other, that is, in the width direction of the second case 2. In this case,
the first and second sound release holes 24 and 25 are substantially fan-shaped on both sides of
the speaker cover 23 as shown in FIG. .
[0031]
That is, the first and second sound emission holes 24 and 25 are formed symmetrically in the
left-right direction, and among the first and second sound emission holes 24 and 25, the first
sound emission hole 24 has the principle shown in FIG. As shown schematically, the right end
face of the lower case 2b of the second case 2 and the end face of the right side of the speaker
cover 23 are formed into inclined surfaces 24a and 24b that are substantially parallel to each
other. Are emitted obliquely downward toward the lower right side of the second case 2.
Similarly, the second sound emission hole 25 is formed in the inclined surfaces 25a and 25b
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substantially parallel to the end surface on the left side of the lower case 2b of the second case 2
and the end surface on the left side of the speaker cover 23; The sound from the speaker 22 is
emitted diagonally downward toward the lower left side of the second case 2.
[0032]
In this case, the speaker covering portion 23 is formed to be thicker than the lower case 2b, and
thereby, protrudes to the lower side than the lower case 2b, so that the inclined surfaces 24b and
25b of the speaker covering portion 23 are lower case 2b. Is formed to be longer than the
inclined surfaces 24a and 25a. Therefore, the first and second sound emission holes 24 and 25
are formed obliquely from the central portions of the sound emission surfaces 21a and 22a of
the first and second speakers 21 and 22 toward the lower sides of the lower case 2b. As a result,
the respective sounds from the first and second speakers 21 and 22 are respectively guided to
the lower sides of the lower case 2b and are emitted obliquely to the lower outside.
[0033]
Further, as shown in FIG. 5, the speaker covering portion 23 protrudes lower than the lower case
2 b of the second case 2 so that a step is formed between the lower surface of the speaker
covering portion 23 and the lower surface of the lower case 2 b. It is formed. Therefore, as
shown in FIG. 5, when the lower case 2b of the second case 2 is placed on the mounting surface
26 such as a table, the stereo speaker unit 12 includes the speaker cover 23 and the lower case
2b. The first and second sound emitting spaces 27 and 28 for guiding the sounds from the first
and second sound emitting holes 24 and 25 to both sides of the second case 2 are formed on the
mounting surface 26 by the step difference of Is configured as.
[0034]
Further, on the inner surface (the upper surface in FIG. 4) of the speaker covering portion 23, a
pair of partition walls 29 and 29 are formed so as to be located between the first and second
speakers 21 and 22. As shown in FIGS. 4 and 5, the pair of partition walls 29 and 29 are
provided at a predetermined interval, and are configured to form an air space 30 between the
first and second speakers 21 and 22. ing. As shown in FIG. 4, foreign matter such as dust
intrudes from the first and second sound emission holes 24 and 25 on the sound emission
surfaces 21a and 22a of the first and second speakers 21 and 22, respectively. Dustproof nets 31
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are provided to prevent the problem.
[0035]
In such a portable telephone, like a normal portable telephone, it is possible to make a call with
the other party by means of the call function, and also to receive music information and listen to
the music in a stereo sense by the stereo speaker unit 12. That is, since the stereo speaker unit
12 includes the first and second speakers 21 and 22, music based on the received music
information can be reproduced by the first and second speakers 21 and 22. In this case, the
stereo speaker unit 12 emits each of the first and second speakers 21 and 22 located on the side
where the first and second speakers 21 and 22 arranged side by side in the second case 2
approach each other. Since the sound surfaces 21a and 22a are covered with the speaker
covering portion 23, it is not necessary to provide a swelled portion for forming an acoustic
space in the second case 2 as in the conventional example, and therefore the second case 2
When the first and second cases 1 and 2 are held by hand, they can be carried well.
[0036]
In addition, the stereo speaker unit 12 is a combination of the first and second speakers 21 and
22 located on the side where the first and second speakers 21 and 22 arranged in the second
case 2 approach each other. A side where the first and second speakers 21 and 22 are separated
from portions corresponding to the sound emitting surfaces 21a and 22a of the first and second
speakers 21 and 22 while covering the sound surfaces 21a and 22a with the speaker covering
portion 23 Since the first and second sound emission holes 24 and 25 are provided toward the
both sides of the speaker covering portion 23 located in the first and second sound emission
holes 24 and 25, the first and second speakers 21, The sound from 22 can be emitted in the
direction away from each other, which can reduce the mixing of the sounds from the first and
second speakers 21 and 22 and can reduce the first and second sound emission holes. Make 24,
25 large enough It is possible, first, it is possible to sufficiently ensure the volume of the sound
from the second speaker 21, thereby to obtain a good stereo effect.
[0037]
In particular, the first speaker 21 and the second speaker 22 are separated from each other from
the portions where the first and second sound emitting holes 24 and 25 correspond to the sound
emitting surfaces 21a and 22a of the first and second speakers 21 and 22, respectively. The first
and second sound emission holes 24 and 25 make the first and second sound emission holes 24
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and 25 sound first, since the sound from the first and second speakers 21 and 22 is formed
obliquely to both sides of the second case 2 located on the side. The second speakers 21 and 22
can emit sound diagonally in the direction away from each other.
Thereby, the directivity of the sound emitted from the first and second sound emission holes 24
and 25 is good, and the mixing of the sounds from the first and second speakers 21 and 22 can
be significantly reduced. Because of this, it is possible to obtain an even higher stereo effect.
[0038]
Further, the air space 30 formed by the pair of partition walls 29 and 29 is provided between the
first speaker 21 and the second speaker 22 to make the first speaker 21 and the second speaker
22 approach each other. Even if it is arranged, the sound of the first speaker 21 and the sound of
the second speaker 22 can be prevented from interfering with each other by the air space 30
formed by the pair of partition walls 29, 29 provided therebetween. Therefore, the sounds
generated by the first and second speakers 21 and 22 can be emitted outside from the first and
second sound emission holes 24 and 25 without interference with each other. The sound of both
the first and second speakers 21 and 22 can be listened to well, which also makes it possible to
obtain a high stereo effect.
[0039]
In addition, the speaker covering portion 23 protrudes lower than the lower case 2b, whereby a
step is formed between the speaker covering portion 23 and the lower case 2b, and the step is
formed on the lower case 2b of the second case 2 by this step. The first and second sound
emitting spaces 27 and 28 are formed to guide the sound from the first and second sound
emitting holes 24 and 25 to both sides of the second case 2 when placed on the mounting
surface 26 of the second case. can do. Therefore, even if the lower case 2b of the second case 2 is
disposed on the mounting surface 26, as shown in FIG. 5, the first sound emission hole 24 and
the second sound emission hole 25 are blocked. The sound emitted from the first sound emission
hole 24 and the second sound emission hole 25 is guided to both sides of the second case 2 by
the first and second sound emission spaces 27 and 28, respectively, The sound can be reliably
emitted to the outside, which also makes it possible to obtain a good stereo effect.
[0040]
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In this case, the speaker covering portion 23 protrudes lower than the lower case 2b and a step
is generated between the speaker covering portion 23 and the lower case 2b, so that the lower
case 2b of the second case 2 is placed on the table 26 or the like. Since the lower case 2b of the
second case 2 and the speaker cover 23 form the first and second sound emitting spaces 27 and
28 when disposed on the upper side, the first and second sound emitting can be performed with
a simple structure. Spaces 27 and 28 can be formed as needed. For this reason, since the first
and second sound emitting spaces 27 and 28 do not exist at the time of carrying, not only the
portability is good, but the speaker covering portion 23 is formed by providing the lower case 2b
of the second case 2 with a step. Since the second case 2 does not have a complicated shape, the
second case 2 having the speaker cover 23 can be easily manufactured.
[0041]
In the first embodiment, the inclined surfaces 24a and 24b of the first sound output hole 24 and
the inclined surfaces 25a and 25b of the second sound output hole 25 are substantially parallel,
but the present invention is not limited to this. It may be formed as in the first modification
shown in FIG. 7 and the second modification shown in FIG. In each of these modifications, only
the first sound emission hole 24 side of the first speaker 21 will be described. For example, the
first modified example shown in FIG. 6 has a structure in which the inclined surface 24b of the
speaker cover 23 is formed into an arc-shaped concave surface among the inclined surfaces 24a
and 24b of the first sound emission hole 24. ing. Further, in the second modification shown in
FIG. 7, with the first sound emission hole 24, the first speaker 21 side corresponds to the entire
sound emission surface 21 a, and the outside side is directed to the lower side of the second case
2. It is structured to be inclined. In any of such structures, substantially the same effects as those
of Embodiment 1 are obtained.
[0042]
Moreover, you may comprise not only this but like the 3rd-5th modification shown in FIGS. 8-10.
For example, in the third modified example shown in FIG. 8, with the same thickness of the lower
case 2 b of the second case 2 and the speaker covering portion 23, the speaker covering portion
23 is protruded lower than the lower case 2 b Thus, the speaker cover 23 and the lower case 2b
have a step, and the resonance space 35 is formed between the first speaker 21 and the first
sound emission hole 24. With such a structure, in addition to the same function and effect as the
first embodiment, in particular, the sound from the first speaker 21 can be resonated by the
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resonance space 35, so that the volume can be further secured.
[0043]
Further, in the fourth modified example shown in FIG. 9, both sides of the lower case 2 b of the
second case 2 are inclined toward both end portions of the speaker covering portion 23 and the
first and second speakers 21 and 22 are also The sound emitting surfaces 21a and 22a of the
first and second speakers 21 and 22 are disposed so as to be inclined, and the first and second
sound emitting holes 24 and 25 face the sound emitting surfaces 21a and 22a. Further, in the
fifth modification shown in FIG. 10, both end portions of the speaker covering portion 23 and
both side portions of the lower case 2b are respectively formed in a continuous flat inclined
portion and the first The second sound release holes 24 and 25 are formed, and the first and
second speakers 21 and 22 are arranged to be inclined on the inner surface of each inclined
portion. In this case, the continuous inclined portions between the both end portions of the
speaker covering portion 23 and the both side portions of the lower case 2b do not have to be
flat and may be formed in a convex arc shape or curved shape . In any of such structures,
substantially the same effects as those of Embodiment 1 are obtained.
[0044]
Second Embodiment Next, a second embodiment in which the portable electronic device of the
present invention is applied to a mobile phone will be described with reference to FIGS. 11 to 13.
The same parts as those of the first embodiment shown in FIGS. 1 to 5 are described with the
same reference numerals. In this mobile phone, a projection 40 is formed on an open / close lid
17 for closing the insertion opening 16a of the card storage unit 16 provided in the second case
2 so as to open and close, and the second case 2 is placed on the mounting surface 26 such as a
tabletop. , The rear surface (the lower surface in FIG. 13) of the second case 2 is slightly floated
above the mounting surface 26 by the projection 40 of the open / close lid 17, and the first and
second sound emission of the stereo speaker unit 12 This structure is substantially the same as
that of the first embodiment except that a sound emission space 41 is formed to emit the sound
emitted from the holes 24 and 25 toward both sides of the second case 2.
[0045]
That is, the open / close lid 17 is disposed in the vicinity of the speaker cover 23 and detachably
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attached to the insertion port 16 a of the card storage unit 16 provided in the second case 2,
thereby being stored in the card storage unit 16. The memory card 15 is configured to be
protected. As shown in FIG. 11, a projection 40 is formed on the outer surface of the open / close
lid 17. The entire projection 40 is formed in a substantially semicircular arc shape, and is formed
such that the height of projection from the surface of the open / close lid 17 is slightly higher
than the outer surface of the speaker cover 23.
[0046]
Thereby, as shown in FIG. 13, when the second case 2 is disposed on the placement surface 26
such as a tabletop, the stereo speaker unit 12 of the second case 2 has the protrusion 40
provided on the open / close lid 17. The rear surface of the second case 2 is slightly lifted from
the mounting surface 26 to form a sound emission space 41 for guiding the sound from the first
and second sound emission holes 24 and 25 to both sides of the second case 2. ing. In this case,
the sound emitting space 41 includes the first sound emitting hole 24 side and the second sound
emitting hole 25 side by the speaker covering portion 23 that covers the sound emitting surfaces
21 a and 22 a of the first and second speakers 21 and 22. It is divided into two parts, that is, the
sound emission space portion on the first sound emission hole 24 side and the sound emission
space portion on the second sound emission hole 25 side.
[0047]
Such a portable telephone has the same function and effect as the first embodiment, and in
particular, the insertion opening 16a of the card storage unit 16 provided in the second case 2 is
closed so as to be openable and closed. Since the projection 40 is provided on the open / close lid
17 for protecting the memory card 15 thus formed, when the second case 2 is disposed on the
mounting surface 26 such as a tabletop, the back of the second case 2 is formed by the
projection 40 It is possible to form a sound emitting space 41 which slightly rises from the
mounting surface 26 and guides the sound from the first and second sound emitting holes 24
and 25 to both sides of the second case 2. Therefore, even if the second case 2 is disposed on the
mounting surface 26, as shown in FIG. 13, the first sound output hole 24 and the second sound
output hole 25 are not blocked, and the first The sound emitted from the second sound emission
holes 24 and 25 can be reliably emitted to the outside from both sides of the second case 2 by
the sound emission space 41, whereby a stereo effect can be obtained favorably. .
[0048]
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In this case, since the projection 40 is formed on the open / close lid 17 of the card storage unit
16, there is no need to provide the projection 40 on the second case 2, and the projection 40
may be formed on the open / close lid 17 different from the second case 2. Since it is sufficient,
the protrusion 40 can be easily formed. Therefore, the shape of the second case 2 is not
complicated, and the second case 2 can be easily manufactured. In particular, since the
projection 40 can also serve as a handle for the opening / closing lid 17, the opening / closing
operation of the opening / closing lid 17 can be facilitated, and the first and second cases 1 and
2 are opened by the projection 40 When the second case 2 is placed on the mounting surface 26,
the weight of the first case 1 can prevent the second case 2 from pivoting so as to lift up, and this
can also provide a user-friendly device.
[0049]
In the second embodiment, the projection 40 is provided on the opening / closing lid 17 that
closes the insertion opening 16a of the card storage unit 16 for storing the memory card 15 so
as to open and close. However, the invention is not limited thereto. A protrusion 40 may be
provided on the battery cover 11 that closes the opening of the battery storage unit so as to be
openable and closable, and the battery cover 11 may be disposed in the vicinity of the stereo
speaker unit 12. Such a structure also has the same effects as the second embodiment.
[0050]
Moreover, although the case where the stereo speaker part 12 was provided in 2nd case 2 was
described in the said Embodiment 1, 2 and the 1st-5th modification, you may provide not only
this but in 1st case 1 . Also in this case, the same effects as in the first and second embodiments
are obtained. Furthermore, although the case where it applied to a mobile telephone as a
portable electronic device was described in the said Embodiment 1, 2 and the 1st-5th
modification, not only this but a portable acoustic device, an electronic dictionary, a calculator, It
can be widely applied to portable electronic devices such as PDAs (personal digital assistants).
[0051]
FIG. 1 is a front view of a mobile phone to which the present invention is applied. (Embodiment
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1) FIG. 2 is a side view of the mobile phone of FIG. It is a rear view of the mobile telephone of
FIG. It is an expanded sectional view in the AA arrow of FIG. It is sectional drawing which showed
the principal part of FIG. 4 in principle. FIG. 10 is an enlarged cross-sectional view of the main
parts showing a first modification of the first embodiment. It is an expanded sectional view of the
principal part which showed the 2nd modification of Embodiment 1. FIG. It is an expanded
sectional view of the principal part which showed the 3rd modification of Embodiment 1. FIG. It
is an expanded sectional view of the principal part which showed the 4th modification of
Embodiment 1. FIG. It is an expanded sectional view of the principal part which showed the 5th
modification of Embodiment 1. FIG. It is the partially disassembled perspective view which
showed the 2nd case in the mobile telephone to which this invention is applied. (Second
Embodiment) FIG. 12 is a rear view of the mobile phone of FIG. It is the side view which showed
the state which has arrange ¦ positioned the mobile telephone of FIG. 12 on a mounting surface.
Explanation of sign
[0052]
DESCRIPTION OF SYMBOLS 1 1st case 2 2nd case 12 stereo speaker part 15 Memory card 16
Card storage part 17 Opening / closing lid 21 1st speaker 22 2nd speaker 21a, 22a Sound
emission surface 23 Speaker covering part 24 1st sound emission hole 25 2nd sound emission
Sound hole 26 Mounting surface 27 1st sound emission space 28 2nd sound emission space 29
partition wall 30 air space 40 projection 41 sound emission space
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