JP4002564B2 - Foldable personal digital assistant - Google Patents

Description

  The present invention relates to a foldable portable information terminal that outputs sound from a speaker.

  In mobile phones, speakers have been used to generate ringtones that notify incoming calls, but in recent years, they have also been used for output of music distributed to mobile phones, hands-free calls, videophone functions, and the like. ing. In the case of a foldable mobile phone, the ring tone is often sounded in the closed state, which is the normal standby state. However, when the foldable mobile phone is open, you can listen to music or talk while watching the screen. It is increasingly used with the phone open.

  In conventional foldable mobile phones, the speaker mounting position and the position of the sound hole, which is the hole that emits the sound output by the speaker, can be used in an open state. Improved the speaker and mounted speakers in two places.

  Opening and closing portable terminal device having a speaker in a hinge portion connecting the first housing and the second housing, and having sound holes formed in a surface exposed in an open state and a surface exposed in a closed state Has been proposed (see, for example, Patent Document 1).

  In addition, there has been proposed a mobile phone in which either the first housing or the second housing is provided with a speaker, and sound holes are formed in the front and side surfaces of the housing provided with the speaker (for example, Patent Documents). 2).

JP 2003-319041 A (paragraphs 0026 to 0054, FIG. 1) JP 2003-134201 A (paragraphs 0012 to 0019, FIG. 3)

  However, there is a difference in sound pressure and frequency characteristics between when the foldable mobile phone is opened and when it is closed, even if the speaker mounting position, the position of the sound hole are taken into consideration, or the characteristics of the speaker are improved. Will appear. Specifically, for example, if a speaker is installed on the LCD surface or key sheet surface in an open state, a sufficient sound pressure can be secured in a state in which the folding cellular phone is opened, but in a closed state, There is a problem that sound pressure deteriorates. Even if sound holes are provided on the front and back surfaces, the sound emitted from the front sound holes and the sound emitted from the back sound holes cancel each other out. There is a problem that it cannot be released. In addition, if the speakers are mounted at two locations, there is a problem that the size and shape of the foldable mobile phone are limited and cost is increased.

  Moreover, since the openable portable terminal device described in Patent Document 1 includes a speaker in the hinge portion, it is difficult to reduce the size of the hinge portion, and the size and shape of the openable portable terminal device are limited. There's a problem.

  The mobile phone described in Patent Document 2 has a problem that a difference is generated between the sound pressure output from the sound hole on the front surface of the housing and the sound pressure output from the sound hole on the side surface of the housing. is there.

  Therefore, an object of the present invention is to provide a foldable portable information terminal that does not change in sound pressure and frequency characteristics of sound to be output between an open state and a closed state.

  A foldable portable information terminal according to the present invention is a foldable portable information terminal including a first casing having a display unit and a second casing having an operation unit, and the first casing. In each of a front surface that is a surface in contact with the second housing in a closed state in which the first housing and the second housing are closed, and a back surface that is a surface opposite to the front surface, A front surface that is provided with a sound hole that is a hole for emitting sound output from a speaker installed inside the first housing, and closes the front sound hole in the closed state in the first housing or the second housing. A sound hole closing means and a back sound hole closing means for closing the sound hole on the back surface in an open state in which the first housing and the second housing are opened are provided.

  The back side, which is a space between the speaker and the inner surface of the back side of the first casing, moved to the first casing in conjunction with the transition of the folding portable information terminal from the open state to the closed state Back side space sealing means that seals the space except for the sound hole on the back side, and the front side of the speaker and the first casing, which moves in conjunction with the transition from the closed state to the open state of the foldable portable information terminal The front side space sealing means for sealing the front side space, which is a space between the inner surface and the front side sound hole, may be provided, and the back side space sealing means and the front side space sealing means are: You may seal so that the back side space and the front side space may become the same volume.

  The back side space sealing means may move by interlocking with the transition from the closed state to the open state of the foldable portable information terminal to open the back side space, and the front side space sealing means is a foldable type The front side space may be opened by moving in conjunction with the transition of the portable information terminal from the open state to the closed state.

  A lid for closing the front sound hole by moving in conjunction with the transition from the open state to the closed state of the folding portable information terminal as a front sound hole closing means in the first housing; As a means, a lid that closes the sound hole on the back surface by moving in conjunction with the transition from the closed state to the open state of the foldable portable information terminal may be provided.

  In conjunction with the transition from the open state to the closed state of the foldable portable information terminal, the front sound hole closing means is moved to the first housing so as to close the front sound hole and the front side space is opened. The front-side space sealing means is moved so that the front-side sound hole closing means is moved so as to open the front-side sound hole in conjunction with the transition from the closed state to the open state of the foldable portable information terminal. The front side shaft that moves the front side space sealing means to seal the side space except for the sound holes on the front side, and the sound on the back side in conjunction with the transition from the open state to the closed state of the foldable portable information terminal The back sound hole closing means is moved so as to open the hole, and the back side space sealing means is moved so as to seal the back side space excluding the back sound hole, so that the folding portable information terminal is opened from the closed state. In conjunction with the transition to the state, the back so as to block the sound hole on the back A rear-side shaft for moving the back side space sealing means may be provided to open the rear side space moves the sound hole closing means.

  The second housing may be provided with a protrusion that closes the sound hole on the front surface of the first housing when the folding portable information terminal transitions from the open state to the closed state as a front sound hole blocking means. The first housing may be provided with a lid that moves and closes the back sound hole in conjunction with the transition from the closed state to the open state of the folding portable information terminal as back sound hole closing means.

  The front-side space sealing means is moved to the first housing so as to open the front-side space in conjunction with the transition from the open state to the closed state of the foldable portable information terminal, and the foldable portable information terminal In conjunction with the transition from the closed state to the open state, the front side shaft for moving the front side space sealing means so as to seal the front side space excluding the front sound holes, and the opening of the folding portable information terminal In synchronization with the transition from the state to the closed state, the back side sound sealing means is moved so as to open the back sound hole and the back side space is sealed except for the back sound hole. In conjunction with the transition from the closed state to the open state of the foldable portable information terminal, the back sound hole closing means is moved so as to close the back sound hole, and the back surface is opened so as to open the back side space. A back side shaft for moving the side space sealing means may be provided.

  The first casing may be provided with a plate that covers the display unit and the sound hole on the front side and vibrates according to the sound of the speaker emitted from the sound hole on the front side. According to such a configuration, sound output from the speaker can be emitted from the entire surface including the display unit and the sound hole on the front side.

  According to the present invention, it is possible to prevent the sound pressure and frequency characteristics of the output sound from changing between the opened state and the closed state of the foldable portable information terminal.

Embodiment 1 FIG.
The first embodiment of the present invention will be described with reference to the drawings, taking a foldable mobile phone 100 as an example of a foldable mobile information terminal. However, the present invention is limited to the foldable mobile phone 100. For example, a foldable PDA (personal digital assistant) may be used. FIG. 1 is a front view showing an example of an external appearance of a foldable mobile phone 100 according to the first embodiment. FIG. 1A is a front view of a state in which the foldable mobile phone 100 is opened. FIG. 1B is a rear view of the folding cellular phone 100 in an opened state. In the foldable mobile phone 100, a surface having the display unit 9 and the operation unit 11 is a front surface, and a surface opposite to the front surface is a back surface. Further, the folded state of the folding mobile phone 100 so that the first casing 110 including the display unit 9 and the second casing 120 including the operation unit 11 are in contact with each other (closed state). The state in which the display unit 9 and the operation unit 11 are exposed on the front surface of the first housing 110 and the second housing 120 is referred to as an open state (open state). FIG. 2 is a side view showing an example of an external appearance of the foldable mobile phone 100 according to the first embodiment. FIG. 2A is a side view of the state in which the folding cellular phone 100 is opened. FIG. 2B is a side view of the foldable mobile phone 100 in a closed state.

  The foldable mobile phone 100 includes a first housing 110 including the display unit 9 and a second housing 120 including the operation unit 11. The first housing 110 includes an upper case 1 that covers the front surface of the first housing 110, an upper cover 2 that covers the back surface of the first housing 110, a receiver 8 that is a speaker for reception, and a display that displays information. Unit 9, front sound hole 1a for allowing sound output from speaker 6 installed in first housing 110 to pass to the front, back sound hole 2a for allowing sound output from speaker 6 to pass to the back, and antenna 10 is included. Further, the first housing 110 includes a first device substrate 5 and a speaker 6 inside. A cushion for adhering the speaker 6 and the upper case 1 is affixed to the front side of the speaker 6, and a cushion for adhering the speaker 6 and the upper cover 2 is affixed to the rear side of the speaker 6. The first device substrate 5 is connected with a connector. The display unit 9 is realized by an LCD (Liquid Crystal Display) or the like, for example. In addition, the area of the front sound hole 1a and the area of the back sound hole 2a shall be the same.

  The second housing 120 includes a lower case 3 that covers the front surface of the second housing 120, a lower cover 4 that covers the back surface of the second housing 120, an operation unit 11 that inputs an operation to the device substrate 5, and audio. The microphone 7 is input. The second casing 120 includes a second device substrate (not shown) inside. The operation unit 11 is realized by, for example, a keyboard.

  The first housing 110 and the second housing 120 are connected by the hinge portion 12, and the first device substrate 5 and the second device substrate are, for example, a connector or a flexible member inside the hinge portion 12. It is connected via a substrate or the like. The hinge portion 12 has a structure that blocks vibration and sound transmission between the first housing 110 and the second housing 120. Specifically, the hinge portion 12 closes the gap at the connection portion between the first housing 110 and the second housing 120 with, for example, a mold or a cushion.

  FIG. 3 is an internal structure diagram of the first casing 110 in a state in which the foldable mobile phone 100 according to the first embodiment is closed. The first housing 110 has a mold or the like so as to pass through only the connector that connects the speaker 6 and the first device substrate 5 and the connector that connects the first device substrate 5 and the second device substrate. A wall 20 that is covered with a cushion or the like, a cushion 21 that tightly attaches the speaker rib 23 provided on the upper cover 2 and the speaker 6, and a speaker rib 24 provided on the upper case 1 and the speaker 6. A shaft (rear side shaft) 25 that is connected to the cushion 22 to be closely attached and the hinge portion 12 and moves in conjunction with opening and closing of the foldable mobile phone 100, and is connected to the hinge portion 12 to open and close the foldable mobile phone 100. The mobile phone 100 is connected to the shaft (front shaft) 26 and the shaft 25 that move in response to the movement of the shaft 25. A movable rib (back space sealing means) 27 that is in close contact with the cushion 21, is connected to the shaft 26, moves according to the movement of the shaft 26, and moves in accordance with the movement of the shaft 26 and is in close contact with the cushion 22 in a state in which the foldable mobile phone 100 is open. Back surface sound hole lid (back surface) which is connected to the front surface space sealing means) 28 and the movable rib 27 and closes the back sound hole 2a in a state in which the folding cellular phone 100 is opened in conjunction with the movement of the movable rib 27. Sound hole closing means) 29, and a front sound hole lid (front surface) that is connected to the movable rib 28 and closes the front sound hole 1a in a state in which the foldable mobile phone 100 is closed in conjunction with the movement of the movable rib 28. Sound hole closing means) 30.

  The wall 20 isolates the space including the first device substrate 5 and the space including the speaker 6, and seals the space including the speaker 6 with the wall 20 and the cushion of the hinge portion 12. FIG. 4 is a structural diagram for explaining the surrounding shapes of the front sound hole 1a and the back sound hole 2a in a state in which the foldable mobile phone 100 is closed.

  FIG. 4A is a structural diagram illustrating the shape around the back sound hole 2a. The speaker 6 and the back sound hole 2 a are covered with speaker ribs 23 and a movable rib 27 provided on the upper cover 2. When the foldable mobile phone 100 is closed, that is, when the foldable mobile phone 100 transitions from the open state to the closed state, the shaft 25 moves in the direction indicated by the arrow in FIG. When the shaft 25 moves in the direction indicated by the arrow in FIG. 3, the movable rib 27 comes into close contact with the speaker rib 23 and the cushion 21, and the periphery of the speaker 6 and the back sound hole 2a is formed around the back sound hole 2a. Cover and seal to remove. When the shaft 25 moves in the direction indicated by the arrow in FIG. 3, the back sound hole cover 29 is slid along the inner surface of the upper cover 2 to open the back sound hole 2a. That is, the shaft 25 seals the periphery of the speaker 6 and the back sound hole 2a except for the hole by the back sound hole 2a in conjunction with the transition of the folding mobile phone 100 from the open state to the closed state. The movable rib 27 is moved, and the back sound hole lid 29 is moved so as to open the back sound hole 2a.

  FIG. 4B is a structural diagram illustrating the shape around the front sound hole 1a. The speaker rib 24 and the movable rib 28 provided in the upper case 1 can cover the speaker 6 and the front sound hole 1a. When the foldable mobile phone 100 is closed, that is, when the foldable mobile phone 100 transitions from the open state to the closed state, the shaft 26 moves in the direction indicated by the arrow in FIG. When the shaft 26 moves in the direction indicated by the arrow in FIG. 3, the movable rib 28 moves away from the speaker rib 24 and the cushion 22, and passes through the space around the speaker 6 and the rear sound hole 2 a that has been sealed in the open state. Move to open. When the shaft 26 moves in the direction indicated by the arrow in FIG. 3, the front sound hole lid 30 is slid along the inner surface of the upper case 1 to close the front sound hole 1a. That is, the shaft 26 is movable so as to open the space around the speaker 6 and the front sound hole 1a that are sealed in the open state in conjunction with the transition of the folding mobile phone 100 from the open state to the closed state. The expression rib 28 is moved, and the front sound hole lid 30 is moved so as to close the front sound hole 1a. As a result, when the foldable mobile phone 100 is closed, the back sound hole 2a is opened and the front sound hole 1a is closed by the front sound hole lid 30, as shown in the example of FIG.

  FIG. 5 is an internal structure diagram of the first housing 110 in a state in which the foldable mobile phone 100 according to the first embodiment is opened. FIG. 6 is a structural diagram for explaining the surrounding shape of the front sound hole 1a and the back sound hole 2a in a state in which the foldable mobile phone 100 is opened.

  FIG. 6A is a structural diagram illustrating the shape around the back sound hole 2a. The speaker rib 23 and the movable rib 27 provided on the upper cover 2 can cover the speaker 6 and the back sound hole 2a. When the foldable mobile phone 100 is opened, that is, when the foldable mobile phone 100 transitions from the closed state to the open state, the shaft 25 moves in the direction indicated by the arrow in FIG. When the shaft 25 moves in the direction indicated by the arrow in FIG. 5, the movable rib 27 moves away from the speaker rib 23 and the cushion 21 and passes through the space around the speaker 6 and the rear sound hole 2 a that has been sealed in the closed state. Move to open. When the shaft 25 moves in the direction indicated by the arrow in FIG. 5, the back sound hole lid 29 is slid along the inner surface of the upper cover 2 to close the back sound hole 2a. That is, the shaft 25 is movable so as to open the space around the speaker 6 and the rear sound hole 2a that are sealed in the closed state in conjunction with the transition from the closed state to the open state of the foldable mobile phone 100. The expression rib 27 is moved, and the back sound hole lid 29 is moved so as to close the back sound hole 2a.

  FIG. 6B is a structural diagram illustrating the shape around the front sound hole 1a. The speaker 6 and the front sound hole 1 a are covered with speaker ribs 24 and movable ribs 28 provided in the upper case 1. When the foldable mobile phone 100 is opened, that is, when the foldable mobile phone 100 transitions from the closed state to the open state, the shaft 26 moves in the direction indicated by the arrow in FIG. When the shaft 26 moves in the direction indicated by the arrow in FIG. 5, the movable rib 28 comes into close contact with the speaker rib 24 and the cushion 22, and the periphery of the speaker 6 and the front sound hole 1a is formed around the front sound hole 1a. Cover and seal to remove. Further, when the shaft 26 moves in the direction indicated by the arrow in FIG. 5, the front sound hole cover 30 is slid along the inner surface of the upper case 1 to open the front sound hole 1a. That is, the shaft 26 is sealed around the speaker 6 and the front sound hole 1a except for the hole formed by the front sound hole 1a in conjunction with the transition from the closed state to the open state of the foldable mobile phone 100. The movable rib 28 is moved, and the front sound hole lid 30 is moved so as to open the front sound hole 1a. As a result, when the folding cellular phone 100 is opened, the front sound hole 1a is opened and the back sound hole 2a is closed by the back sound hole cover 29 as shown in the example of FIG.

  The operation of the first embodiment of the present invention will be described. Here, in FIG. 3, a space (back space) covered with the speaker rib 23, the movable rib 27, the upper cover 2, and the speaker 6 is defined as a space V2. In FIG. 5, a space (front side space) covered with the speaker rib 24, the movable rib 28, the upper case 1, and the speaker 6 is defined as a space V3. Furthermore, the space except space V2 and space V3 among the space covered with the cushion of the wall 20, the upper case 1, the upper cover 2, and the hinge part 12 is defined as a space V1. The volume of the space V2 when the movable rib 27 is in close contact with the speaker rib 23 and the cushion 21 and the volume of the space V3 when the movable rib 28 is in close contact with the speaker rib 24 and the cushion 22 are described. , Shall be the same.

  When the foldable mobile phone 100 is closed, the back sound hole 2a is opened, the space V2 that is the back side space is sealed except for the hole by the back sound hole 2a, and the front sound hole 1a is covered with the front sound hole cover. The space V3 which is closed by 30 and is the front side space is opened and connected to the space V1. At this time, for example, when the speaker 6 outputs a ring tone, the ring tone is emitted from the back sound hole 2a. At this time, the space V2 becomes the front air chamber (front volume) of the speaker 6, and the space V1 and the space V3 become the rear air chamber (back surface volume) of the speaker 6.

  When the foldable mobile phone 100 is opened, the shaft 25 and the shaft 26 move in the direction indicated by the arrows in FIG. 5 to move the movable rib 27 away from the speaker rib 23 and the cushion 21 to open the space V2. The space V2 and the space V1 are connected, the back sound hole lid 29 is slid along the inner surface of the upper cover 2, and the back sound hole 2a is closed. Further, the movable rib 28 is in close contact with the speaker rib 24 and the cushion 22 to seal the space V3 except for the hole by the front sound hole 1a, and the front sound hole cover 30 is slid along the inner surface of the upper case 1. The front sound hole 1a is opened.

  When the speaker 6 outputs a ring tone, for example, in a state in which the foldable mobile phone 100 is opened, the ring tone is emitted from the open front sound hole 1a. At this time, the space V3 becomes the front air chamber (front volume) of the speaker 6, and the space V1 and the space V2 become the rear air chamber (back surface volume) of the speaker 6.

  As described above, according to this embodiment, the volume of the space V2 and the space V3 is the same, so that the speaker 6 is in a closed state and an open state. The front air chamber and the rear air chamber have the same volume. Therefore, the sound pressure and frequency characteristics of the emitted sound are the same between the closed state and the opened state of the foldable mobile phone 100, and the sound pressure and frequency characteristics due to opening and closing of the foldable mobile phone 100 are the same. There is an effect that changes can be prevented.

  In this embodiment, the sound output from the speaker 6 is emitted with the same sound pressure and frequency characteristics when the foldable mobile phone 100 is closed and opened. The configuration may be applied to the receiver 8 in consideration of the characteristics of the microphone 7 and the mounting position. Then, similarly to the state in which the foldable mobile phone 100 is opened, it is possible to make a call even in the closed state.

Embodiment 2. FIG.
A second embodiment of the present invention will be described. In the second embodiment of the present invention, the lower case 3 has a protruding rib (protruding portion) that completely closes the front sound hole 1a with the foldable mobile phone 100 closed. One housing 110 does not have the front sound hole lid 30. Since the other configuration is the same as that of the first embodiment, the other components are denoted by the same reference numerals as in FIGS.

  When the foldable mobile phone 100 is closed, that is, when the foldable mobile phone 100 transitions from the open state to the closed state, the shaft 25 moves in the direction indicated by the arrow in FIG. When the shaft 25 moves in the direction indicated by the arrow in FIG. 3, the movable rib 27 comes into close contact with the speaker rib 23 and the cushion 21, and the periphery of the speaker 6 and the back sound hole 2a is formed around the back sound hole 2a. Cover and seal to remove. When the shaft 25 moves in the direction indicated by the arrow in FIG. 3, the back sound hole cover 29 is slid along the inner surface of the upper cover 2 to open the back sound hole 2a. That is, the shaft 25 seals the periphery of the speaker 6 and the back sound hole 2a except for the hole by the back sound hole 2a in conjunction with the transition of the folding mobile phone 100 from the open state to the closed state. The movable rib 27 is moved, and the back sound hole lid 29 is moved so as to open the back sound hole 2a.

  When the foldable mobile phone 100 is closed, that is, when the foldable mobile phone 100 transitions from the open state to the closed state, the shaft 26 moves in the direction indicated by the arrow in FIG. When the shaft 26 moves in the direction indicated by the arrow in FIG. 3, the movable rib 28 moves away from the speaker rib 24 and the cushion 22, and passes through the space around the speaker 6 and the rear sound hole 2 a that has been sealed in the open state. Move to open. That is, the shaft 26 is movable so as to open the space around the speaker 6 and the front sound hole 1a that are sealed in the open state in conjunction with the transition of the folding mobile phone 100 from the open state to the closed state. The expression rib 28 is moved. Further, the protruding rib of the lower case 3 of the second housing 120 closes the front sound hole 1a. As a result, when the foldable mobile phone 100 is closed, the back sound hole 2a is opened, and the front sound hole 1a is closed by the protruding ribs of the lower case 3 of the second casing 120.

  When the foldable mobile phone 100 is opened, that is, when the foldable mobile phone 100 transitions from the closed state to the open state, the shaft 25 moves in the direction indicated by the arrow in FIG. When the shaft 25 moves in the direction indicated by the arrow in FIG. 5, the movable rib 27 moves away from the speaker rib 23 and the cushion 21 and passes through the space around the speaker 6 and the rear sound hole 2 a that is sealed in the closed state. Move to open. When the shaft 25 moves in the direction indicated by the arrow in FIG. 5, the back sound hole lid 29 is slid along the inner surface of the upper cover 2 to close the back sound hole 2a. That is, the shaft 25 is movable so as to open the space around the speaker 6 and the rear sound hole 2a that are sealed in the closed state in conjunction with the transition from the closed state to the open state of the foldable mobile phone 100. The expression rib 27 is moved, and the back sound hole lid 29 is moved so as to close the back sound hole 2a.

  When the foldable mobile phone 100 is opened, that is, when the foldable mobile phone 100 transitions from the closed state to the open state, the shaft 26 moves in the direction indicated by the arrow in FIG. When the shaft 26 moves in the direction indicated by the arrow in FIG. 5, the movable rib 28 comes into close contact with the speaker rib 24 and the cushion 22, and a hole formed by the front sound hole 1a is formed around the speaker 6 and the front sound hole 1a. Cover and seal to remove. That is, the shaft 26 seals the periphery of the speaker 6 and the front sound hole 1a except for the hole by the front sound hole 1a in conjunction with the transition from the closed state to the open state of the foldable mobile phone 100. The movable rib 28 is moved. The protruding ribs of the lower case 3 of the second casing 120 open the front sound hole 1a. As a result, when the foldable mobile phone 100 is opened, the front sound hole 1a is opened, and the back sound hole 2a is closed by the back sound hole lid 29.

  As described above, according to this embodiment, since the protruding rib of the lower case 3 of the second casing 120 closes the front sound hole 1a in the closed state, the front sound hole lid 30 is Even if it is not, the same effect as the first embodiment can be obtained.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a front view illustrating an example of an external appearance of the first casing 110 of the foldable mobile phone 100 according to the third embodiment. In this embodiment, a plate 13 is installed on the front surface of the first housing 110 of the foldable mobile phone 100 via the cushion 14 so as to cover the display unit 9 and the front sound hole 1a. Since the other configuration is the same as that of the first embodiment, the other components are denoted by the same reference numerals as in FIGS.

  FIG. 8 is an internal structure diagram of the first housing 110 in a state in which the foldable mobile phone 100 according to the third embodiment is opened. The plate 13 is bonded to the upper case 1 via a cushion 14. The plate 13 is transparent to the extent that the display of the display unit 9 is transmitted. For example, the plate 13 is a plate made of plastic such as polystyrene, and is preferably as thin as possible.

  For example, when the speaker 6 outputs a ring tone with the foldable mobile phone 100 opened, the ring tone is emitted from the open front sound hole 1a. Then, the vibration of the air due to the ringtone is transmitted to the plate 13 through the space V4 sealed by the upper case 1, the cushion 14, and the plate 13. Then, the plate 13 vibrates in accordance with the transmitted air vibration, and emits a ringtone to the front surface of the foldable mobile phone 100.

  Since the operation in the state in which the foldable mobile phone 100 is closed is the same as the operation in the first embodiment, the description thereof is omitted.

  As described above, according to this embodiment, the ring tone output from the speaker 6 can be emitted from the entire surface covering the display unit 9 and the front sound hole 1a. Note that the volume of the space V4 is so large that it can be ignored compared to the volumes of the space V2 and the space V3 (so as not to affect the sound pressure and frequency characteristics of the sound output from the speaker 6). However, as long as it has characteristics that do not affect the sound pressure and frequency characteristics of the sound output from the speaker 6, as in the effect of the first embodiment, In the open state, the sound pressure and frequency characteristics of the emitted sound are the same, and changes in the sound pressure and frequency characteristics due to opening and closing of the folding mobile phone 100 can be prevented.

In addition, each cushion in each embodiment mentioned above is a sponge or urethane foam, for example, and it is preferable that it is higher density. For example, it is 200 kg / m ³ or 480 kg / m ³ .

  The present invention can be applied to a foldable mobile phone, a foldable PDA, and the like.

It is a front view which shows one example of an external appearance of 1st Embodiment of a foldable mobile telephone. It is a side view which shows the example of 1 external appearance of 1st Embodiment of a foldable mobile telephone. It is an internal structure figure of the 1st case in the state where the folding type cellular phone of a 1st embodiment was closed. FIG. 5 is a structural diagram illustrating the shape of the periphery of a front sound hole and a back sound hole in a state in which the folding mobile phone is closed. It is an internal structure figure of the 1st case in the state where the folding type cellular phone of a 1st embodiment was opened. It is a structural diagram explaining the surrounding shape of the front sound hole and the back sound hole in a state in which the foldable mobile phone is opened. It is a front view explaining the example of one external appearance of the 1st housing | casing of the foldable mobile telephone in 3rd Embodiment. It is an internal structure figure of the 1st housing | casing of the state which opened the foldable mobile telephone of 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper case 1a Front sound hole 2 Upper cover 2a Back surface sound hole 3 Lower case 4 Lower cover 5 1st apparatus board 6 Speaker 7 Microphone 8 Receiver 9 Display part 10 Antenna 11 Operation part 12 Hinge part 13 Boards 14, 21, and 22 Cushion 20 Wall 23, 24 Speaker rib 25, 26 Shaft 27, 28 Movable rib 29 Back sound hole cover 30 Front sound hole cover 100 Folding mobile phone 110 First case 120 Second case V1, V2 , V3, V4 space

Claims (8)

In a foldable portable information terminal comprising a first casing having a display section and a second casing having an operation section,
A front surface that is a surface of the first housing in contact with the second housing in a closed state in which the first housing and the second housing are in a closed state; A sound hole that is a hole that emits sound output from a speaker installed inside the first housing is provided on each of the back surface that is a surface,
Front sound hole closing means for closing the front sound hole in the closed state, the first housing and the second housing are opened in the first housing or the second housing. And a back sound hole closing means for closing the sound hole on the back surface in the open state, which is a folded state. A back surface that moves to the first housing in conjunction with the transition from the open state to the closed state of the foldable portable information terminal and is a space between the speaker and the inner surface on the back side of the first housing Back side space sealing means that seals the side space except for the sound holes on the back side, and the speaker and the first casing move in conjunction with the transition from the closed state to the open state of the folding portable information terminal Front side space sealing means for sealing the front side space, which is a space between the front side inner surface of the front side, except for the sound holes on the front side, is provided,
The foldable portable information terminal according to claim 1, wherein the back side space sealing unit and the front side space sealing unit seal the back side space and the front side space so as to have the same volume. The back side space sealing means opens the back side space by moving in conjunction with the transition from the closed state to the open state of the foldable portable information terminal,
The foldable portable information terminal according to claim 2, wherein the front side space sealing means opens the front side space by moving in conjunction with the transition from the open state to the closed state of the foldable portable information terminal. A lid for closing the front sound hole by moving in conjunction with the transition from the open state to the closed state of the folding portable information terminal as a front sound hole closing means in the first housing; As a means, a lid for closing the sound hole on the back surface by moving in conjunction with the transition of the folding portable information terminal from the closed state to the open state is provided. The foldable portable information terminal described in the item. In the first housing,
The front-side space sealing means moves the front-side sound hole closing means so as to close the front-side sound hole and opens the front-side space in conjunction with the transition of the folding portable information terminal from the open state to the closed state. In conjunction with the transition from the closed state to the open state of the foldable portable information terminal, the front sound hole closing means is moved so as to open the front sound hole and the front side space is A front-side shaft that moves the front-side space sealing means so as to seal except for the front sound hole;
In conjunction with the transition from the open state to the closed state of the foldable portable information terminal, the back sound hole closing means is moved so as to open the back sound hole, and the back side space is removed from the back sound hole. The back sound hole closing means is moved so as to close the sound hole on the back surface in conjunction with the transition from the closed state to the open state of the folding portable information terminal. The foldable portable information according to any one of claims 2 to 4, further comprising: a back side shaft that moves the back side space sealing means so as to move the back side space and open the back side space. Terminal. As the front sound hole closing means on the second housing, a projection is provided that closes the sound hole on the front surface of the first housing when the folding portable information terminal transitions from the open state to the closed state.
The first casing is provided with a lid that closes the back sound hole by moving in conjunction with the transition from the closed state to the open state of the folding portable information terminal as back sound hole closing means. The foldable portable information terminal according to any one of claims 1 to 3. In the first housing,
The front side space sealing means is moved so as to open the front side space in conjunction with the transition from the open state to the closed state of the foldable portable information terminal, and the foldable portable information terminal is opened from the closed state to the closed state. In conjunction with the transition to, the front side shaft that moves the front side space sealing means to seal the front side space excluding the front sound hole,
In conjunction with the transition from the open state to the closed state of the foldable portable information terminal, the back sound hole closing means is moved so as to open the back sound hole, and the back side space is removed from the back sound hole. The back sound hole closing means is moved so as to close the sound hole on the back surface in conjunction with the transition from the closed state to the open state of the folding portable information terminal. The back side shaft which moves the back side space sealing means so as to move the back side space and open the back side space is provided. The folding according to any one of claims 2, 3 and 6. Tatami type portable information terminal. The first casing is provided with a plate that covers the display unit and the sound hole on the front surface side and vibrates according to the sound of the speaker emitted from the sound hole on the front surface side. The foldable portable information terminal according to any one of the preceding claims.

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