JP4387342B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to a portable electronic device such as a mobile phone or a notebook computer.

2. Description of the Related Art Portable electronic devices are known in which an accommodation space for accommodating electronic components and the like is formed between a base and a lid that covers the base. Various techniques for waterproofing or dustproofing the housing space have been proposed. Patent Document 1 discloses a technique for improving drainage by providing a drainage groove at a peripheral position of a battery cover (lid) of a casing (base body) and preventing moisture from entering the battery housing portion from the peripheral edge of the battery cover. Has been.
JP-A-8-8546

  However, as in Patent Document 1, even if a drainage groove is provided on the peripheral edge of the lid, there are cases where flooding into the accommodation space cannot be prevented. For example, when a sound guide space for guiding the sound of a speaker is provided between the base and the lid, the sound guide space and the outside of the housing communicate with each other through a sound output hole. Moisture and dust enter through the holes. On the other hand, if the base and the lid are brought into close contact with each other at a high pressure, the lid is deformed or it is difficult to attach and detach the lid by sliding the lid against the base. Means contact with a relatively low pressure or close proximity. For this reason, a gap through which water and dust can pass may be formed between the base and the lid. Then, moisture and dust are diffused from the sound guide space to the housing space for electronic components or the like through the gap.

  An object of the present invention is to provide a portable electronic device that can prevent diffusion of water or dust through a gap between a base and a lid.

  A portable electronic device according to a first aspect of the present invention is a portable electronic device having electroacoustic conversion means, which is provided in a storage recess for storing a battery and a surface on which the storage recess is formed, and the electroacoustic conversion A housing including a sound guide recess that forms a sound guide space of the means, and a cover that is attached to the base and covers the storage recess and the sound guide recess. A sound hole that communicates between the sound guide space and the outside of the housing is formed, and at least one of the opposing surfaces of the base body and the lid body is in a region between the sound guide recess and the storage recess. A first groove that does not communicate with the sound guide recess and the storage recess is formed.

  Preferably, the periphery of the sound guide recess faces the inside of the lid with a space that is in contact with the inside of the lid or narrower than the width of the first groove.

  Preferably, the first groove is formed so as to surround at least a part of the periphery of the sound guide recess on the side opposite to the sound hole.

  Preferably, at least one of the opposing surfaces of the base body and the cover body extends from a region between the sound guide recess and the storage recess to the edge of the base body or the cover body and is external to the housing. The 2nd groove part connected to is formed.

  Preferably, the first groove portion and the second groove portion communicate with each other.

Preferably, the edge of the lid is configured to wrap around a part of the side surface of the base.

  Preferably, a member having water absorption is disposed in the first groove portion.

  Preferably, an elastic member that contacts the base and the lid is disposed in the first groove.

  A portable electronic device according to a second aspect of the present invention is a portable electronic device including a housing including a base and a lid that covers the base, and the portable electronic device is provided between the base and the lid. Is formed with a first space communicating with the outside of the housing and a second space for storing a power source or an electronic component, and the first space and the second space are the base body and the lid. Provided in one of the bodies and partitioned by a partition portion that contacts or approaches the other, and the partition portion is disposed in an area where the first and second surfaces of the base body and the lid body face each other. A groove portion that does not communicate with the first space and the second space is formed.

  According to the present invention, it is possible to prevent diffusion of water or dust through the gap between the base and the lid.

  1 and 2 are external perspective views showing a mobile phone 1 according to an embodiment of the present invention. The mobile phone 1 is configured as a so-called foldable mobile phone. FIG. 1 shows an open state, and FIGS. 2A and 2B show a closed state.

  The mobile phone 1 includes a receiving housing (first housing) 2 and a transmitting housing (second housing) 3. The receiving housing 2 and the transmitting housing 3 are connected at their respective ends by a connecting portion 4, and the mobile phone 1 can be opened and closed with the connecting portion 4 side as the center of rotation. The receiving case 2 and the transmitting case 3 are each formed in a substantially thin rectangular parallelepiped shape, and are superposed on each other in the closed state, and the outlines of the receiving case 2 and the sending case 3 substantially coincide when viewed from the other case side. It is like that.

  The receiving case 2 includes a front side case 6 on the side (front side) facing the transmitting case 3 in a closed state and a back side case 7 on the back side. The front side case 6 and the back side case 7 are each formed of resin, for example. The receiving housing 2 is provided with a main display unit 11 that displays an image on the front surface and a sub display unit 12 that displays an image on the back surface. The main display unit 11 and the sub display unit 12 are configured by, for example, a liquid crystal display. In addition, the receiving case 2 is provided with a speaker for telephone call, and a sound emitting hole 17 of the speaker is provided in the front case 6.

  The transmitter case 3 includes a front-side case 8 on the side facing the receiver case 2 in the closed state, a rear-side case 9 on the back side, and a lid 10 that covers the back side of the back-side case 9. It has. The front side case 8, the back side case 9, and the lid 10 are each formed of resin, for example. The transmitter case 3 is provided with an operation unit 13 for receiving user operations, an antenna, a circuit board on which an IC chip or an electronic component is mounted, a battery (battery) 26, a call microphone, and a notification speaker 25. For example, various buttons such as a numeric keypad 14 a and a cursor key 14 b are arranged on the operation unit 13 and exposed from the front case 8. A sound collecting hole 15 of a microphone for communication (not shown) is opened on the front surface of the transmitting housing 3, and a sound emitting hole 16 of a later-described notification speaker 25 is opened on the back surface of the transmitting housing 3. Yes.

  FIG. 3 is a perspective view showing a part of the connection portion 4 of the cellular phone 1 in an open state with a part thereof broken. In the connecting portion 4, a convex portion 18 protruding from one end of the receiving housing 2 is fitted into a concave portion 19 provided at one end of the transmitting housing 3, and the shaft member 20 is connected to the wall portion of the concave portion 19 and the convex portion 18. It is configured to be inserted through. The shaft member 20 is pivotally supported with respect to at least one of the wall portion of the concave portion 19 and the convex portion 18, and the receiving housing 2 and the transmitting housing 3 are rotatable relative to each other about the shaft member 20 as a rotation axis. .

  The convex portion 18 is generally formed in a semi-cylindrical shape around the rotation axis. There is a gap between the outer peripheral surface 18a around the rotation axis of the projection 18 and the wall surface 19a parallel to the rotation axis of the recess 19, and the rotation of the projection 18 with respect to the recess 19 is allowed. On the other hand, an end surface 18b orthogonal to the rotation axis of the convex portion 18 is in contact with a wall surface 19b sandwiching the convex portion 18 of the concave portion 19, and slides with respect to the wall surface 19b of the concave portion 19 when the mobile phone 1 is opened and closed. To do.

  A notification speaker (electroacoustic conversion means) 25 for notifying the user of an incoming call or notifying the user of an operation is provided inside the housing of the wall portion of the recess 19. The notification speaker 25 is configured, for example, in a substantially disk shape, and has an electrode portion 25a on one surface of the disk and a speaker surface 25b (see FIG. 4) on the other surface. It is arranged on the back side of the body 3 (lower side of the paper in FIG. 3). The notification speaker 25 vibrates cone paper (vibration plate) arranged on the speaker surface 25b side according to the current input to the electrode portion 25a and outputs sound.

  FIG. 4 is a cross-sectional view (in the direction of arrows IV-IV in FIG. 5) showing a part of the transmission case 3. Note that the upper side of the drawing is the back side of the transmitter case 3. The notification speaker 25 is arranged on the inside of the housing of the back side case 9 (downward in the drawing). A battery 26 as a power source of the mobile phone 1 is disposed on the back side of the back side case 9. The notification speaker 25 and the battery 26 are covered with the lid 10.

  FIG. 5 is a perspective view of the rear case 9 of the transmitter casing 3 as viewed from the rear side of the transmitter casing 3. The back side case 9 is generally formed in a box shape with the inside of the housing as a concave as a whole, and when the back side case 9 and the front side case 8 are combined, a space is formed between them. For example, a circuit board (not shown) provided with a high-frequency circuit or the like is disposed in the space.

  The back side case 9 and the front side case 8 are inserted through a through hole 9n opened in the back side case 9, and the screw is screwed into a screw boss (not shown) of the front side case 8. Are fixed to each other. The through hole 9n and the screw inserted through the through hole 9n are covered with the lid body 10, and are not visually recognized from the outside as shown in FIG. The lid body 10 and the back side case 9 are fixed to each other by, for example, engaging portions and engaged portions provided on the lid body 10 and the back side case 9 being engaged.

  As shown in FIG. 2, the front side case 8 and the back side case 9 are formed to have the same size. The lid body 10 is put on the back side case 9 and constitutes substantially the entire back surface of the transmitter case 3. Specifically, the lid 10 forms a range from the end on the opposite side to the connecting portion 4 to the recess 19 in the entire back surface, and only the back of the projection 9a sandwiching the projection 18 is the back. A side case 9 is used.

  As shown in FIG. 5, the facing surface 9s of the back side case 9 on which the lid body 10 is covered is formed so as to cut out the back surface, leaving the convex portion 9a, and the lid body 10 covers the facing surface 9s. Then, as shown in FIGS. 2 and 4, the back surface of the convex portion 9 a and the back surface of the lid body 10 are continuous. As shown in FIG. 5, most of the facing surface 9s is formed as a flat surface. The peripheral side of the facing surface 9s is formed so as to bend toward the inside of the housing and then become parallel again. The facing surface 10s (see FIGS. 4 and 7) of the lid 10 facing the facing surface 9s is also formed in the same shape as the facing surface 9s, and when the lid 10 is put on the facing surface 9s, the facing surface 10s faces. The surface 9s and the facing surface 10s are in contact with each other or face each other in a minute space.

  As shown in FIGS. 4 and 5, the rear case 9 is provided with a holding portion 9 b for holding the notification speaker 25. Specifically, a sound guide recess 9c having a recess on the back side is provided in a portion on the recess 19 side of the back side case 9, and the holding portion 9b protrudes from the bottom of the sound guide recess 9c to the back side. It is formed as follows. The holding portion 9b is formed in a cylindrical shape having a concave inside the housing of the back side case 9, and has a wall portion 9d and an end surface portion 9e. The end surface portion 9e is formed in a circular frame shape so that a circular opening 9f having a smaller diameter than the speaker surface 25b of the notification speaker 25 is opened. The notification speaker 25 is inserted and fitted into the concave portion of the holding portion 9b from the inside of the housing, and is held by the holding portion 9b by suppressing the electrode portion 25a side by a circuit board or the like.

  As shown in FIG. 4, the protruding amount of the holding portion 9 b is smaller than the depth of the sound guide recess 9 c, and a gap is generated between the end surface portion 9 e and the lid body 10. Therefore, a sound guide space (first space) SP for guiding the sound output from the notification speaker 25 and emitted from the opening 9f to the outside of the housing is formed around the holding portion 9b.

  The sound guide space SP includes a first sound guide portion SPa that guides sound from the opening 9f and a second sound guide portion SPb that guides sound from the first sound guide portion SPa. The first sound guide portion SPa is defined by the wall portion on the back center side of the lid body 10, the end surface portion 9e, and the sound guide recess 9c. The second sound guide portion SPb is defined by the lid 10, the wall portion 9d, the bottom portion 9h of the sound guide recess 9c, and the wall portion 9g on the recess 19 side of the sound guide recess 9c. The second sound guide part SPb has a larger width (depth) from the lid body 10 than the first sound guide part SPa by the amount of protrusion of the holding part 9b. The distance between the lid 10 and the end surface portion 9e in the first sound guide portion SPa is, for example, 1/10 to 1/2 of the thickness of the notification speaker 25, for example, 1 mm. The protruding amount of the holding portion 9b is, for example, approximately the same as the thickness of the notification speaker 25, and is, for example, 5 mm.

  A sound emitting hole 16 provided in the lid body 10 communicates with the first sound guide portion SPa. Therefore, the sound guided by the first sound guide part SPa is emitted to the outside of the housing through the sound emission hole 16.

  A plurality of sound emission holes 9k communicate with the second sound guide portion SPb. The sound emission holes 9k are opened in the wall portion 9g of the sound guide recess 9c, and are arranged in a line along the rotation axis direction of the connecting portion 4, for example. The wall portion 9g is also a wall portion that forms the concave portion 19, and the sound guided by the second sound guide portion SPb is emitted to the concave portion 19 through the sound emitting hole 9k. The sound emitted to the concave portion 19 is emitted to the back side or the front side of the transmitter case 3 through a gap between the outer peripheral surface 18 a of the convex portion 18 and the wall surface 19 a of the concave portion 19.

  As shown in FIG. 5, the sound guide recess 9 c is formed in an arc shape having the same diameter as the holding portion 9 b on the center side of the back side case 9, and is formed so as to spread from the back center side to the recess 19 side. . In other words, the second sound guide portion SPb is formed so as to spread toward the concave portion 19 side. The sound emitting holes 9k are arranged over a range substantially equal to or wider than the diameter of the notification speaker 25. Accordingly, the sound source is in the form of a megaphone from the sound source toward the sound outlet, and the sound of the notification speaker 25 is efficiently emitted.

  As shown in FIGS. 4 and 5, the rear case 9 is formed with a storage recess 31 for storing the battery 26. The storage recess 31 is formed with the back side as a recess on the side opposite to the connecting portion 4 of the back side case 9. The sound emitting hole 9k is located on the opposite side of the housing recess 31 with respect to the notification speaker 25. The storage recess 31 is formed in, for example, a substantially rectangular parallelepiped shape having a size equivalent to that of the battery 26. The battery 26 is fitted and inserted into the storage recess 31, and the cover 10 is put on the storage recess 31. It is fixed against.

  As shown in FIG. 4, a storage space (second space) ST for storing the battery 26 is formed by the storage recess 31 and the lid 10. Moreover, in the back side case 9, the part which forms the mutually adjacent wall part of the storage recessed part 31 and the sound guide recessed part 9c, and the opposing surface 9s between the said wall parts partitions the storage space ST and the sound guide space SP. The partition part is configured.

  As shown in FIG. 5, a terminal (electronic component) 33 connected to the battery 26 is provided on the side surface side of the housing recess 31. The terminal 33 includes a plurality of contacts 33a urged to the inside of the storage recess 31 by an urging means (not shown). By inserting the battery 26 into the storage recess 31, the contact 33a becomes a contact ( The battery 26 and the terminal 33 are connected to contact with each other (not shown). Thereby, the power of the battery 26 is supplied via the terminal 33 to the main display unit 11, the sub display unit 12, the notification speaker 25, a substrate on which a high-frequency circuit (not shown) is provided, and the mobile phone 1 is driven.

  There is a possibility that water or dust may enter the sound introduction space SP from the sound emission holes 9k and the sound emission holes 16. Therefore, the back side case 9 includes a first groove portion 35 and a second groove portion 37 for preventing infiltration of water and dust from the storage space ST into the sound guide space SP. 9s.

  The first groove 35 extends so as to surround a part of the periphery of the sound guide recess 9c. Specifically, along the edge of the sound guide recess 9c, it extends from the corner of the sound guide recess 9c on the recess 19 side to a region between the sound guide recess 9c and the storage recess 31, and further from there. It extends to the other corner of the recess 9c on the recess 19 side, and extends in a substantially U shape. Accordingly, the first groove portion 35 is provided so as to divide the region between the storage recess portion 31 and the sound guide recess portion 9c. Further, the first groove 35 is independent of the storage recess 31 and the sound guide recess 9c, and does not communicate with the storage recess 31 and the sound guide recess 9c.

  The second groove portion 37 extends so as to divide the facing surface 9s into the housing recess 31 side and the sound guide recess 9c side. Specifically, it extends linearly along the edge of the storage recess 31 on the sound guide recess 9c side, and the end reaches the edge of the opposing surface 9s. Accordingly, the second groove portion 37 has an edge portion of the back side case 9 and the lid body 10 (gap when the lid body 10 is attached to the back side case 9) from the region between the storage recess 31 and the sound guide recess 9c. It extends to the periphery and communicates with the outside of the housing. Further, the second groove portion 37 communicates with the first groove portion 35, the storage recess portion 31, and the sound guide recess portion 9 c.

  FIG. 6 is an enlarged view of a portion surrounded by a circle C1 in FIG. 4, and is a cross-sectional view around the first groove portion 35 (second groove portion 37).

  In the case of a structure in which the facing surface 10s is slid on the facing surface 9s and the lid 10 is engaged with the back side case 9, the facing surface 9s and the facing surface 10s are not in close contact with each other to be slidable. It is necessary to do so. Further, it is necessary to prevent the lid body 10 from being deformed by a high pressure from the back side case 9. For this reason, the opposing surface 9s and the opposing surface 10s are designed not to adhere to each other with a very high pressure. For this reason, even when the facing surface 9s of the back side case 9 and the facing surface 10s of the lid 10 are designed to contact each other, due to accuracy error during manufacturing, ambient temperature change, and heat generation of the mobile phone 1 Due to thermal deformation or the like, they may be separated from each other by a distance d1. On the contrary, there may be a case where the opposing surface 9s and the opposing surface 10s are designed to be separated by a distance d1 in advance so that the opposing surface 9s and the opposing surface 10s do not adhere to each other due to high accuracy. For this reason, the facing surface 9s and the facing surface 10s are in contact with each other or face each other at a relatively small distance d1.

  The cross-sectional shape of the first groove portion 35 is formed in a substantially rectangular shape. However, any cross-sectional shape may be used. The width d2 of the first groove portion 35 is appropriately set, but is preferably set larger than the distance d1. For example, the distance d1 is less than 0.5 mm, and the width d2 is 0.5 mm to 3 mm. The depth of the 1st groove part 35 is also set suitably. For example, it is set equal to the depth of the second sound guide portion SPb or equal to the width d2.

  FIG. 7 is a cross-sectional view of the transmitter case 3 in the direction of arrows VII-VII in FIG. The lid 10 is formed to wrap around part of the side surface of the back side case 9. Most of the facing surface 9s and the facing surface 10s are formed flat, and the peripheral side is curved toward the inside of the housing (the back side case 9 side of the back side case 9 and the lid body 10) and becomes flat again. It is formed to become. Accordingly, the second groove portion 37 formed so as to cross the facing surface 9s is also formed to be curved toward the inside of the housing (in the depth direction of the second groove portion 37) on the peripheral side. In addition, as shown in FIG. 5, the 2nd groove part 37 is curving in the outer peripheral side of the back side case 9 (lid body 10) rather than the storage space ST and the sound guide space SP.

  According to the above embodiment, the first groove 35 independent of the sound guide recess 9c and the storage recess 31 is formed in the region between the sound guide recess 9c and the storage recess 31. The water or dust that enters the sound introduction space SP from the sound hole 9k or the sound emission hole 16 and further enters the storage space ST from the gap between the facing surface 9s and the facing surface 10s is the first groove portion 35. The storage space ST is discharged or dust-proof. The water accumulated in the first groove portion 35 will eventually evaporate. In other words, when water accumulates in the first groove portion 35, it is possible to earn time for evaporating water between the facing surface 9s and the facing surface 10s.

  Usually, a small amount of water enters between the opposing surface 9s and the opposing surface 10s, and a sufficient waterproof effect can be obtained if water can be guided to the first groove portion 35 by capillary action (capillary phenomenon). Therefore, a waterproof effect can be obtained regardless of the orientation of the mobile phone 1 with respect to gravity. Note that the width and depth of the first groove 35 and the like may be set so that water can be effectively distributed to the first groove 35 and the second groove 37 by capillary action.

  And providing a groove | channel can be easily implement | achieved by forming a groove | channel, for example in the metal mold | die process for injection molding. Therefore, in addition to the waterproof and dustproof measures for attaching a mesh or the like to the sound emitting hole 9k or the sound emitting hole 16, the waterproof and dustproof can be improved at a low cost, and the assembly process is not increased.

  Since the periphery of the sound guide recess 9c is in contact with the inside of the lid 10 or faces the inside of the lid 10 with a space (width d1) narrower than the width d2 of the first groove 35, the sound guide recess 9c Water and dust are prevented from diffusing from 9c to the surroundings, and water or dust that has entered between the periphery of the sound guide recess 9c and the inside of the lid body 10 has a capillary between the facing surface 9s and the facing surface 10s. Even if it is transmitted by the phenomenon, it is easy to accumulate in the first groove portion 35, and it is difficult to transmit to the storage recess 31 beyond the groove portion 35 (37).

  The sound emitting hole 9k is formed on the opposite side of the housing recessed portion 31 with respect to the notification speaker 25, and the first groove portion 35 surrounds at least a part of the periphery of the sound guiding recessed portion 9c opposite to the sound emitting hole 9k. Thus, the distance from the sound emitting hole 9k to the housing recess 31 is increased, and the entry of water and dust from the sound emitting hole 9k into the housing recess 31 is suppressed.

  Since the second groove portion 37 extending from the region between the sound guide recess 9c and the storage recess 31 to the edge of the back side case 9 or the lid 10 and communicating with the outside of the housing is formed, the sound guide recess The drainage between 9c and the accommodation recessed part 31 improves.

  Further, since the first groove 35 and the second groove 37 communicate with each other, water or dust accumulated in the first groove 35 can be discharged through the second groove 37, and the storage recess The waterproofing effect or dustproof effect of 31 improves.

  The edge side of the lid body 10 is curved toward the back side case 9 side. For this reason, for example, when the storage recess 31 is placed downward and the lid 10 is placed upward, that is, when the storage recess 31 is placed in a state in which water or the like is likely to enter, The water in the second groove portion 37 easily flows to the surrounding side due to gravity and is prevented from flowing back to the center side of the lid body 10.

  8-10 is a figure which shows the modification of embodiment of this invention.

  In the modification shown in FIG. 8, the second groove portion is not provided, and only the first groove portion 135 is provided. Even in this case, the first groove 135 accumulates water between the storage space ST and the sound guide space SP and evaporates the water in the facing surface 109s facing the facing surface 10s of the lid 10. It can be waterproofed by earning enough time.

  In the modification shown in FIG. 9, the first groove portion 235 and the second groove portion 237 are not communicated with each other, but can have double means for stopping the intrusion of water. Therefore, the 1st groove part 235 has an effect similar to the modification of FIG. And the waterproofness improves further by providing the 2nd groove part 237 which has drainage property.

  In the modification shown in FIG. 10, a member 341 having water absorption and elasticity is disposed in the first groove 335. The member 341 is, for example, a sponge. Since the member 341 has water absorption, water intrusion from the sound guide space SP to the storage space ST is efficiently prevented. In addition, the member 341 has elasticity, and the gap between the facing surfaces is separated from the storage space ST by abutting between the facing surface 10s of the lid 10 and the facing surface 309s of the back case 309 with a predetermined biasing force. It is blocked from the sound guide space SP, and the waterproof effect or dustproof effect is improved. Further, since the lid 10 and the back side case 309 can be fixed with elasticity, the lid 10 will not vibrate when the volume is increased. On the other hand, the sliding of the lid 10 is not disturbed.

  In addition, the member 341 may be comprised by what has water absorption and does not have elasticity. For example, the member 341 may be paper or cloth. Even in this case, the waterproof effect by water absorption of the member 341 can be obtained. In addition, the member 341 may be configured by an elastic material that does not absorb water. For example, the member 341 may be rubber. Even in this case, a waterproof effect or the like can be obtained by blocking the gap between the opposing surfaces between the storage space ST and the sound guide space SP. Furthermore, in order to improve the sliding of the lid 10 with respect to the back side case 309 and improve the opening / closing feeling of the lid 10, a member 341 having improved surface sliding may be used. For example, by laminating a film made of PET on the surface of a sponge or attaching a fluorine-based powder to rubber, laminating a water-absorbing member or elastic member with a member having a smaller coefficient of friction than these members. May be.

  In addition, the second groove portion may or may not be provided. When the second groove portion is provided, the member 341 may be disposed in both the first groove portion and the second groove portion. It may be arranged only on one side. The member 341 may be disposed over the entire first groove portion or the second groove portion, or may be disposed only in a part of the groove portion.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The portable electronic device of the present invention is not limited to a mobile phone as long as a space for storing a power source, electronic components, and the like is formed between the base and the lid. For example, a notebook computer or PDA may be used. Moreover, it is not necessary to be comprised by two housings, for example, it may be comprised by one housing | casing.

  The base body and the lid body may be any one as long as one is covered with the other when viewed relatively between the two members. Therefore, for example, the base body may function as a lid for other members other than the lid body, or another member is further covered on the lid body, and the lid body serves as the base body for the other members. It may be functioning.

  The groove may be provided on the base body or may be provided on the lid. In any case, a space deeper than the gap between the opposing surfaces of the base body and the lid is formed, and water and dust that diffuses between the opposing surfaces are collected, so that a waterproof effect and a dustproof effect are obtained.

  The storage space and the sound guide space may be formed by providing a recess on the base, formed by providing a recess on the lid, or formed by providing a recess on both sides. It is only necessary to be partitioned by the partition portion. Furthermore, this partition part may be formed in any of the base | substrate side and the cover body side, and should just contact | abut or adjoin with respect to the other from one provided.

  The first space is not limited to the sound guiding space as long as it is formed between the base and the lid and communicates with the outside of the housing. For example, it may be a duct of a cooling fan. The second space is not limited to the battery storage space as long as it is formed between the base and the lid and can store the power supply or the electronic component. For example, it may be a space in which a circuit board is stored.

  The electroacoustic conversion means may be anything that converts electricity into sound or sound into electricity, and may be a microphone.

  The position of communication between the first groove and the second groove may be anywhere. However, if the storage space and the sound guide space communicate with each other, the water that is about to enter the storage space side from the first groove can be efficiently drained.

1 is an external perspective view showing a mobile phone according to an embodiment of the present invention in an open state. The external appearance perspective view which shows the mobile telephone of FIG. 1 in a closed state. FIG. 2 is an external perspective view including a cross-sectional view in a part of the mobile phone of FIG. Sectional drawing which shows a part of mobile telephone of FIG. The perspective view which shows the back side case of the transmission housing | casing of the mobile telephone of FIG. The enlarged view of the range shown by the circle C1 of FIG. Sectional drawing in the VII-VII line of FIG. The figure which shows the modification of embodiment of this invention. The figure which shows the modification of embodiment of this invention. The figure which shows the modification of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mobile phone (portable electronic device), 3 ... Transmission case, 9 ... Back side case (base | substrate), 9c ... Sound-conduction recessed part, 9k ... Sound emission hole, 10 ... Cover, 26 ... Battery, 31 ... Storage recess, 25 ... informing speaker (electroacoustic conversion means), 35 ... first groove, SP ... sound guiding space.

Claims (9)

In a portable electronic device having electroacoustic conversion means,
A base having a storage recess for storing a battery, and a sound guide recess provided on a surface where the storage recess is formed, and forming a sound guide space of the electroacoustic conversion means;
A lid attached to the base body and covering the storage recess and the sound guide recess;
Including a housing including
The casing is formed with a sound hole that communicates the sound guide space with the outside of the casing.
A first groove portion that does not communicate with the sound guide recess and the storage recess is formed in at least one of the opposing surfaces of the base and the lid in a region between the sound guide recess and the storage recess. Has been a portable electronic device. 2. The portable electronic device according to claim 1, wherein a peripheral edge of the sound guide concave portion is in contact with an inner side of the lid body or faces an inner side of the lid body with a space narrower than a width of the first groove portion. 3. The portable electronic device according to claim 1, wherein the first groove portion is formed so as to surround at least a part of the periphery of the sound guide recess opposite to the sound hole. At least one of the opposing surfaces of the base body and the lid body extends from the region between the sound guide recess and the storage recess to the edge of the base body or the lid body and communicates with the outside of the housing. The portable electronic device according to claim 1, wherein two groove portions are formed. The portable electronic device according to claim 4, wherein the first groove portion and the second groove portion communicate with each other. The portable electronic device according to claim 4, wherein an edge of the lid is configured to wrap around part of the side surface of the base. The portable electronic device as described in any one of Claims 1-6 by which the member which has water absorption is arrange | positioned at the said 1st groove part. The portable electronic device according to claim 1, wherein an elastic member that contacts the base body and the lid is disposed in the first groove portion. A portable electronic device having a housing including a base and a lid that covers the base,
Between the base and the lid,
A first space communicating with the outside of the housing;
A second space for storing a power source or electronic components;
Formed,
The first space and the second space are provided by one of the base body and the lid body, and are partitioned by a partition portion that is in contact with or close to the other,
In the partition area, a groove that does not communicate with the first space and the second space is formed on at least one of the opposing surfaces of the base and the lid. machine.

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