JP3718497B2 - Portable communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable communication device such as a cellular phone, and more particularly to measures against flooding caused by dropping into water.
[0002]
[Prior art]
Some portable communication devices such as cellular phones are designed with a specific usage environment in mind. For example, the mobile phone described in Non-Patent Document 1 is designed for use in a water / border environment such as a ship, beach, pool, bathroom, etc. Even if it is immersed, it has a feature that moisture does not enter the inside thereof, and functional deterioration and functional abnormality do not generally occur. This feature or the performance equivalent to JIS protection class 7 as a result is achieved by various devices on the mounting structure.
[0003]
FIG. 4 shows a schematic structure of the mobile phone described in Non-Patent Document 1. On the front side of the mobile phone shown in this figure, a receiver 10 as a receiver, a microphone 12 as a transmitter, a plurality of keys 14 as input operation means, an LCD (liquid crystal) unit 16 as display means, and the like are arranged. On the back side are a speaker 22 as a loudspeaker output means, an incoming lamp 24 for notifying the user of an incoming call by light emission, an external antenna 26 for external incoming and outgoing wireless transmission, and a battery pack 28 as a driving power source. Etc. are arranged. Further, an earphone jack or the like for connecting an earphone is provided on the side surface, and a 16-core connector or the like for connecting to an external information processing device or a charging device is provided on the lower end surface (both not shown). .
[0004]
The casing of this cellular phone has a structure in which the front case 18 and the rear case 32 are fitted and fixed, and a side cover 34 is attached to the side portion. More specifically, the front transparent portion of the LCD unit 16 incorporated in the upper half of the front side, the microphone cover 20 that is a cover of the microphone 12 incorporated in the lower end of the front side, and the battery pack 28 are accommodated. A battery pocket cover 30 that is a cover of the earphone jack, an earphone jack cover 36 that covers the earphone jack, a connector cover 38 that covers the 16-core connector, a front transparent portion of the incoming lamp 24, a front inscription of the key 14, an external antenna 26, etc. Appears on the housing surface.
[0005]
The first measure for improving the waterproof performance of the cellular phone is to prevent water from entering the casing from the gap by filling the gap. For example, a rubber packing or the like is provided at the fitting portion between the front case 18 and the back case 32 to achieve waterproofing. Similarly, around the 16-core connector, earphone jack, power supply port to the external antenna 26, terminals for connection between the battery pack 28 and the internal circuit (for example, circuits / parts on the PC board 40), screws at various places A rubber packing is also provided in the hole or the like to prevent water from entering. Further, the seam between the front case 18 and the LCD unit 16 and the gap between the key rubber to which the key 14 is attached and the front case 18 are fixed and sealed with an adhesive so as to be waterproof.
[0006]
The second waterproof performance improvement measure is a measure to prevent water from entering from the holes into the housing by covering various holes. For example, a connector cover 38 is provided for a 16-core connector. When the 16-core connector is not used, the connector cover 38 covers the 16-core connector and can generally prevent moisture from entering. Similarly, the earphone jack cover 36 is a member for preventing water from entering the earphone jack. Further, a waterproof sheet is bonded to the microphone sound emitting hole 20a vacated in the microphone cover 20 from the inside to prevent water from entering the microphone sound emitting hole 20a. The same applies to the receiver 10 and the speaker 22. The screw holes at various places are also waterproofed with rubber packing.
[0007]
A third waterproof performance improvement measure is a measure that adopts an individual waterproof structure for a part that is removed or pulled out from the main body. For example, since the battery pack 28 is a component that a user or the like replaces, the battery pack 28 is waterproofed by the structure described in Japanese Patent Application No. 2002-206589. Further, since the external antenna 26 is used as a drawer whip antenna as necessary, it is waterproofed separately from the main body.
[0008]
In the illustrated mobile phone, a drop impact buffering measure by the side cover 34 is adopted in addition to the waterproofing performance improving measures described above as a performance improving measure related to use on the water and at the water's edge. The side cover 34 is made of an elastomer resin, and cushions an impact when the side cover 34 falls on the water surface or the like.
[0009]
The mobile phone described in Non-Patent Document 1 realizes waterproof performance and impact resistance performance by such a device. For example, even if the end user drops it into the water, except in extreme cases such as when it has been in the water for a long time or when the connector cover 38 is not closed properly, it is inadvertent. As a result, there is no functional problem. Since it can be washed with tap water, it is possible to remove dirt on the exterior that does not fall off when wiped with a cloth. Even when dropped in seawater, the metal parts can be prevented from corroding if washed with tap water after the fact. Furthermore, if it is just about taking a shower while making a phone call, it can withstand enough. In addition, since the side cover 34 is a shock absorber, there is little possibility that the side cover 34 will be broken due to the impact of falling and colliding with the water surface.
[0010]
Of the three documents listed below, Patent Documents 1 and 2 will be discussed later in comparison with embodiments of the present invention.
[0011]
[Patent Document 1]
JP-A-7-174844
[Patent Document 2]
JP 2002-142835 A
[Non-Patent Document 1]
Authorized and published by Japan Radio Co., Ltd., “GEOFREE II docomo Mova R692i“ World's First, i-mode Floating in the Water ”” [online], 2002, [searched on November 5, 2002], Internet, <URL: http: //www.jrc.co.jp/jp/product/comm/mobilephone/R692i/, especially index.html and pdf / R692i.pdf in that directory>
[0012]
[Problems to be solved by the invention]
Strictly speaking, the waterproof performance and impact resistance performance described above are not broken even when immersed in water, and are not broken by an impact dropped on the water surface. By manufacturing the front case 18, the back case 32, etc. with a lightweight material, the overall specific mass is suppressed to about 0.98, so that it does not sink deeply into the water after dropping on the water surface, but floats on the water surface. In this case, with a significant probability, the external antenna 26 and the incoming lamp 24 float in a posture facing the underwater side as shown in FIG.
[0013]
If it becomes a floating state as shown in FIG. 5, it becomes difficult to find the mobile phone. First of all, when searching for a lost mobile phone, in most cases, the user first looks around him and then moves around to some extent to visually search. If it is not found by visual search, a method may be used in which the lost mobile phone is called from another phone. That is, after calling, a method of checking whether a ringing tone / ringing melody-like sound can be heard or whether a ringing-lamp-like light can be seen is taken. However, in the floating state on the back, the radio wave is reflected by water as noted in FIG. 5, so that the mobile phone cannot receive / receive or receive sufficient reception sensitivity, and the ringtone, incoming melody Often, no incoming lamp light or the like is generated. Even if the sound is emitted or emitted, the sound and light are emitted toward the water, making it difficult to reach the ears and eyes of the searcher.
[0014]
An object of the present invention relates to a waterproof cellular phone or a portable communication device similar to the same, and is to facilitate a search at the time of dropping in water and to obtain a waterproof performance superior to that of the conventional one.
[0015]
[Means for Solving the Problems]
The present invention includes (1) a housing of An externally projecting antenna for wireless connection and a housing of An invention relating to a portable communication device, such as a mobile phone, which is provided on the surface and is provided with a notification member such as an incoming call lamp or a speaker, which is provided on the surface and notifies the user by light, sound, etc. It is. In order to achieve the above object, the present invention provides ( 2 ) In the state where the portable communication device is dropped and floated on the water surface, the portable communication device is provided with a levitation means for imparting buoyancy to the portable communication device so that at least the antenna and the notification member are arranged on the water surface. The levitation means includes an air layer formed inside the casing of the portable communication device. The housing includes a rear case in which the antenna protrudes from the surface and the notification member is provided on the surface, and a front case attached to the rear case, and the air layer includes the rear case. Formed by It is characterized by that. In the portable communication device according to the present invention, ( 3 ) In a state where the portable communication device falls and floats on the surface of the water, the portable communication device is arranged such that the antenna and the notification member are placed at higher positions than the other portions of the portable communication device. Preferably, the apparatus includes posture control means for controlling the water surface floating posture of the apparatus, and the posture control means is configured to include a flooded space formed inside the casing of the portable communication device. In the portable communication device according to the present invention, ( 4 ) In the state where the portable communication device is dropped and floated on the water surface, the portable communication device is arranged so that at least the antenna and the notification member are arranged on the water surface in cooperation with the posture control means. It is preferable that the apparatus includes levitation means for imparting buoyancy to the apparatus, and the levitation means includes an air layer formed inside the casing of the portable communication apparatus.
[0016]
In a preferred embodiment of the present invention, the antenna and the notification member are arranged on the upper back of the portable communication device. The posture control means is, for example, closer to the lower part of the front surface of the portable communication device than the antenna and the notification member, and more than the center of gravity of the portable communication device when not flooded. An inundation space provided near the front or lower part of the device and open to the outside of the portable communication device, and allowing the inundation into the inundation space when the portable communication device falls on the water surface Thus, the center of gravity position of the portable communication device is moved closer to the lower part of the front side than the position of the center of gravity when not flooded. As the flooded space here, for example, (i) a key rubber provided on the lower half of the front surface of the portable communication device is formed in a gap between the keys by the key rubber, A bag-like space for receiving moisture that enters through a gap; (ii) a microphone cover that covers a microphone provided in the lower front portion of the portable communication device and a front side portion of the casing of the portable communication device; A bag-like space formed in a gap with the front case and receiving moisture entering through the gap between the microphone cover and the front case; and (iii) a drop impact buffer covering a side portion of the portable communication device. There is a bag-like space that is formed in a gap between the side cover and the front case and receives moisture that enters through the gap between the side cover and the front case. Preferably, at least one of these is provided. Furthermore, it is preferable to provide a water inlet in the flooded space for draining moisture that has entered the flooded space when the portable communication device is lifted onto the water. More preferably, a front case which is a front side portion of the casing of the portable communication device is provided. Magnesium alloy Form with. Further, the above-described levitation means can be realized by an air layer formed inside the casing of the portable communication device.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Since the present invention can be realized as an improvement of the mobile phone described in Non-Patent Document 1, an embodiment of the mobile phone is taken up in the following description. Accordingly, members that are the same as or correspond to those shown in FIGS. 4 and 5 are given the same reference numerals, and redundant descriptions are omitted. Note that the present invention is not limited to a mobile phone, and can be applied to any portable communication device that is used on the water and at the water's edge and therefore requires waterproof performance.
[0018]
1 and 2 show a configuration of a mobile phone according to an embodiment of the present invention. The device in the present embodiment is firstly provided with three types of inundated spaces as described below. These flooded spaces are all located closer to the lower part of the front surface of the mobile phone than the external antenna 26 and the speaker 22 and the incoming lamp 24 as notification members to the user, that is, more than the center of gravity of the mobile phone when not flooded. It is provided near the front or lower part. These flooded spaces are opened to the outside of the mobile phone through various gaps and water passages, and when the mobile phone falls on the water surface, water enters these flooded spaces. In other words, in the present embodiment, the center of gravity position 42A (FIG. 2 (2) of the mobile phone at the time of falling of the water surface is obtained by allowing the inundation only to the place intended by the designer (see FIGS. 1B and 2C). B) is controlled mechanically and structurally to move the position of the center of gravity at the time of non-flooding toward the lower part of the front surface. Note that all three types are not essential, and at the time of carrying out the present invention, at least one of them may be provided according to the required performance. Moreover, you may provide the water immersion space which has the same effect | action in aspects other than three types demonstrated below (namely, the water immersion space in this invention is not limited to these three types).
[0019]
First, the first submerged space is a bag-like space formed by the key rubber 48 in the gap between the key 14 and the key 14 as shown in an enlarged view in FIG. The key rubber 48 is a sheet formed of an elastic material having a convex portion provided at an essential point, and the key 14 is attached to the convex portion. On the other hand, as shown in FIG. 1A, a hole is provided in the front case 18A, which is the front side portion of the housing, so that the front inscription of the key 14 is exposed. Therefore, the shape of the front case 18A around the key 14 is a rib shape as shown in FIG. Therefore, when the illustrated mobile phone falls into the water, water flows into the bag-like space formed by the key rubber 48 from the gap between the rib-like portion of the front case 18 </ b> A and the key 14. This bag-like space receives and holds this water while the mobile phone is floating on the water surface. When the mobile phone is lifted onto the water, water flows out from the gap between the rib-like portion of the front case 18A and the key 14, and this bag-like portion is filled with air in the same manner as before dropping.
[0020]
Next, the second submerged space is a bag-shaped space formed in a gap between the microphone cover 20A covering the microphone 12 housed in the lower front portion of the mobile phone and the front case 18A. In this embodiment, as shown in FIG. 1 (B), the front case recess is recessed below the front case 18A so as to avoid or surround the part where the microphone 12 is housed. 18a is provided. The microphone cover 20A covers the lower part of the front case 18A including the part directly above the microphone 12 and the part directly above the front case recess 18a. Therefore, the space in the front case 18A immediately above the microphone 12 and the internal space of the front case recess 18a become a bag-shaped space as described above. Furthermore, a notch serving as a water passage 20b is provided at the end of the microphone cover 20A closer to the 16-core connector. Accordingly, when the illustrated mobile phone falls into the water, the water passage 20b, the microphone sound emitting hole 20a, and the delicate gap formed at the joint between the front case 18A and the microphone cover 20A, and the microphone 12 Water flows into the bag-like space in front of the. This bag-like space receives and holds this water while the mobile phone is floating on the water surface. When the mobile phone is lifted on the water, water is mainly discharged from the water outlet 20b by gravity or the like, and this bag-like portion is filled with air in substantially the same manner as before dropping.
[0021]
The third submerged space is a bag-shaped space formed in the gap between the side cover 34A covering the side portion for buffering the drop impact and the front case 18A. Specifically, this space is realized by a side cover recess 34a that is a recess provided in a portion of the side cover 34A near the lower portion of the mobile phone. Further, as shown in FIG. 1B, the side cover recess 34a is generally provided at a position facing the front surface of the front case 18A. Since the front case 18A is a front side housing of the mobile phone, it can be said that the side cover recess 34a is provided at a position closer to the front side and lower side of the side surface of the mobile phone. When the illustrated mobile phone falls into water, water flows into a bag-like space in the side cover recess 34a from a delicate gap formed at the joint between the side cover 34 and the front case 18A or the back case 32. This bag-like space receives and holds this water while the mobile phone is floating on the water surface. When the mobile phone is lifted onto the water, water flows out from the gaps above, and the bag-like portion is filled with air, almost as before the fall.
[0022]
It should be noted that even if moisture enters the first to third submerged spaces, the PC board 40, the speaker 22 and other members in the closed space formed by the front case 18A and the rear case 32 may be disturbed. There is no. Specifically, first, as in the prior art, the key rubber 48 and the front case 18A are bonded together at the peripheral edge thereof, and the gap between the front case 18A and the peripheral members is waterproofed by rubber packing or the like. . That is, since the space in which the PC board 40 or the like is stored and the first submerged space are partitioned so that there is no water flow, the PC board 40 or the like even if water enters the first submerged space. Moisture does not leak into the side. Next, since the front case recess 18a is outside the front case 18A and a water-proof sheet for preventing moisture intrusion is provided on the front surface of the microphone 12, even if water flows into the second submerged space, the PC board Water does not leak into the 40 or the microphone 12 side. In the configuration shown in FIG. 1 (B), in order to ensure that water enters the third submerged space through the gap between the side cover 34A and the back case 32 and the volume of the side cover recess 34a is secured. Since the cover recess 34a is also extended to the back case 32 side, the joint between the front case 18A and the back case 32 can be exposed to water, but since this joint is waterproofed by rubber packing or the like as in the prior art, Moisture does not leak into the side of the PC board 40 or the like.
[0023]
Thus, in this embodiment, since the water immersion space is provided on the portion near the front side and the lower portion of the mobile phone as described above, when the mobile phone falls on the water surface, water flows into the water immersion space, and the center of gravity. The position moves toward the lower front. Therefore, the posture of the mobile phone after dropping on the water surface is a leaning posture with the key 14 and the LCD unit 16 facing downward, as shown in FIG. 3, and the posture in which the lower end portion sinks more than the upper end portion. Further, in the present embodiment, the external antenna 26, the speaker 22, the incoming lamp 24, and the like are disposed in pairs with each of the above-mentioned flooded spaces with the center of gravity position 42A at the time of flooding in between. Therefore, in the present embodiment, when the mobile phone is dropped on the water surface, the location of the external antenna 26, the speaker 24, the incoming lamp 26, etc. is higher than other locations of the mobile phone, for example, the location of the key 14. It can be said that posture control is performed so as to maintain the position.
[0024]
Further, when the mobile phone according to the present embodiment is taken up from the water, water is drained from each flooded space as described above. Therefore, the position of the center of gravity is closer to the back and upper than the position before dropping, that is, the previous position 42A. Return to. The center-of-gravity position at the time of non-water immersion can be designed according to the weight balance in the user's hand as in the past. That is, it can be avoided that the weight balance of the mobile phone according to the present embodiment greatly changes from the conventional one, and the user feels uncomfortable. In order to set the position of the center of gravity at the time of non-water immersion in the present embodiment to be approximately the center of the mobile phone in the same manner as the conventional position 42 shown in FIG. 4B, an air layer 44 described below is provided. Further, the design may be performed in consideration of the influence of alloying of the front case 18A. Furthermore, as shown in FIGS. 1A and 1B, the first to third flooded spaces are symmetrical with respect to the center line in the longitudinal direction of the mobile phone. It can be said that there is no big difference. Further, since the flooded space itself does not have a weight, there is no significant increase in weight by providing the flooded space. Rather, the amount of provision of the side cover recess 34a and the like is reduced.
[0025]
The second device in the present embodiment is that air layers 44 and 46 that function as floating means when floating in the water are provided in the mobile phone closed space formed by the front case 18A and the back case 32. is there. The air layer 44 is air stored in the vicinity of a location where the speaker 22 is stored. Even in the conventional waterproof mobile phone, the air space 44 in the present embodiment is characterized by the speaker 22 as compared with the conventional case, because air is present in the interior space and air circulation to the outside is blocked. A large amount is stored in the vicinity, that is, it is stored closer to the upper back than the center of gravity position 42A at the time of flooding. As a method for realizing the air layer 44, for example, as in the present embodiment, the internal space is expanded by increasing the thickness of the mobile phone (compare FIGS. 2B and 4B). is there. As another method, there is also a method of downsizing various storage components. As another method, there is also a method of placing components in the main body casing as close to the front as possible. Of these three methods, the latter two can be implemented without increasing the internal volume of the mobile phone main body, and the former one can only slightly increase the internal volume of the mobile phone main body. These three methods can be combined with each other as appropriate. On the other hand, the air layer 46 is an air layer formed in a pocket for housing the battery pack 28. For example, if the battery pocket cover 30 has a structure described in Japanese Patent Application No. 2002-206589, in particular, an integrated double cover structure that holds air between the inner cover and the outer cover, and the amount of air retained by this structure is increased. The air layer 46 can be realized.
[0026]
The air layers 44 and 46 act as floats when dropped in water. That is, the specific mass of the entire mobile phone is lowered. However, if the volume of the air layers 44 and 46 is increased unnecessarily, the external dimensions of the mobile phone increase and portability is impaired. Taking this into consideration, when the air layers 44 and 46 are designed within a range where the portability is not so much impaired, the specific mass of the entire mobile phone of this embodiment can be reduced to about 0.9. . Under the design that is less than the specific mass of water, the mobile phone according to the present embodiment, even if it falls on the surface of the water, is only temporarily submerged in water at the moment, and the buoyancy increased by the air layers 44, 46, etc. 3 again emerges on the surface of the water, resulting in the state shown in FIG.
[0027]
At this time, since the attitude control function is working as described above, the external antenna 26, the speaker 22, the incoming lamp 24, etc. appear on the surface of the water. That is, it is possible to receive and receive from the outside with a good sensitivity, and to suitably transmit sound and light indicating the fact to the atmosphere above the water. Therefore, even if the user drops the mobile phone according to the present embodiment during the water activity and loses his whereabouts for a while, the probability that the mobile phone can be found by calling the mobile phone from another phone is high. . If a loudspeaker 22, incoming lamp 24 or the like having a high output or a large size is used, the discovery probability is further increased. In addition, since the specific mass is small, the fact that it rises naturally and quickly facilitates the discovery by visual search. The probability of the occurrence of a failure due to water immersion is reduced by the short residence time in water immediately after the drop and the small surface area continuously submerged after the fall.
[0028]
In addition, the proposal regarding providing a float in the communication apparatus for maritime rescue is shown by patent document 1, and the proposal regarding using the case used together with a mobile phone as a float is shown by patent document 2, respectively. That is, it can be said that a portable communication device for water with an external levitation unit is conventionally known. On the other hand, the mobile phone according to the present embodiment is based on the idea that, by using the internal space, the floating means is realized without using the internal space, and thus without attaching a member to be replaced. The present embodiment also has a feature of center of gravity movement. These ideas and features are not disclosed or suggested in Patent Documents 1 and 2. Furthermore, when the inventions described in Patent Documents 1 and 2 are implemented, the appearance is different from the conventional one. On the other hand, the attitude control means and the levitation means in the present invention, as described above, may be accompanied by a slight increase in thickness or the like, but are essentially mobile phones or similar portable communication devices. It can be realized by devising the internal structure of the. That is, according to the present invention, it is easy to achieve both the preferred implementation of the invention and a free appearance design as compared with the inventions described in Patent Documents 1 and 2. With respect to portable communication devices, particularly popular devices, the purchase layer has traditionally emphasized the appearance. Therefore, the present invention is more popular than the inventions described in Patent Documents 1 and 2. It can be said that this is more suitable for the portable communication device.
[0029]
In addition to the above-described devices, some devices can be applied to the present embodiment. For example, the front case 18A that is the front side portion of the casing of the mobile phone is preferably formed of a magnesium alloy that is lightweight and excellent in rigidity. Since this type of alloy is generally heavier than resin, the center of gravity can be set to the front side by forming the front case 18A from this type of alloy, thereby enhancing the aforementioned attitude control function. it can.
[0030]
As another device, for example, the housing of the external antenna 26 is integrated with the housing of the main body (such as the back case 32). By this device, there is no gap between the joint portion of the housing of the external antenna 26 and the main body housing, so that the waterproof performance is improved and the corrosion resistance is improved. However, with this ingenuity, it is not possible to take a widely adopted and widespread structure and usage form in which the external antenna 26 is pulled out and away from the user's head to ensure reception sensitivity. However, even in the conventional mobile phone, the antenna is generally pulled out only when making a call or when the radio wave is weaker, and the antenna is not pulled out at the time of standby or the like. Considering this point, it can be said that the external antenna 26 of the mobile phone when dropped in water is often not pulled out even if it has a pullable structure. Therefore, even if the embodiment described above is modified so that the external antenna 26 cannot be pulled out, it cannot be said that any particular trouble is added to the search by calling from another telephone.
[0031]
Another idea is to form a closed air layer in which water does not enter from the outside in a portion near the upper portion of the side cover 34A. This has an effect of increasing buoyancy, although a lid for forming a closed space or a complicated formation process is required.
[0032]
In the above description, an example in which the water inlet 20b is provided for the second submerged space to improve drainage has been shown. However, the first and third submerged spaces are also provided with the same water inlet / outlet as the water inlet 20b. The drainage should be improved. Furthermore, although the example arrange | positioned symmetrically about the mobile telephone longitudinal direction center line about each inundation space and the air layers 44 and 46 was shown, this may be asymmetrical. For example, the weight balance may be intentionally broken so that the external antenna 26 slightly rises when floating on the water surface.
[0033]
【The invention's effect】
As described above, according to the present invention, by controlling the attitude of the portable communication device by the submerged space or the like so that the antenna and the notification member are disposed at a higher position than the other parts of the portable communication device. Further, it is possible to prevent a situation in which the antenna or the notification member faces the underwater side and the incoming call or the incoming call notification to the user becomes impossible or difficult. In addition, according to the present invention, by providing buoyancy to the portable communication device so that at least the antenna and the notification member are arranged on the water surface, the portable communication device is prevented from being submerged and lost by visual search. Effects such as expansion of the possibility, expansion of the possibility of successful search by an incoming call from outside, and effective display of waterproof performance can be obtained. According to the present invention, a waterproof cellular phone or a similar portable communication device is obtained by combining the attitude control in which the antenna and the notification member are tilted upward and the increase in buoyancy acting on the portable communication device. Can be easily searched when dropped in water, and can provide waterproof performance superior to that of the prior art.
[Brief description of the drawings]
1A and 1B are diagrams showing a structure of a mobile phone according to an embodiment of the present invention, in particular, FIG. 1A is a plan view showing a front appearance, FIG. 1B is an II-II cut end view, and FIG. It is a bottom view.
FIGS. 2A and 2B are diagrams showing a configuration in the vicinity of a key rubber in this embodiment, in particular, FIG. 2A is a plan view showing a rear appearance, FIG. 2B is a sectional view of Ia-Ia, and FIG. .
FIG. 3 is a diagram showing characteristic effects in this embodiment.
FIGS. 4A and 4B are diagrams showing a structure of a mobile phone according to a conventional technique, in particular, FIG. 4A is a plan view showing a rear appearance, FIG. 4B is a sectional view taken along line II, and FIG. A plan view, (D) is a bottom view.
FIG. 5 is a state diagram showing a problem of the prior art, in particular, a state where the front case side is lifted up.
[Explanation of symbols]
12 microphone, 14 key, 18A front case, 18a front case recess, 20A microphone cover, 20b water outlet, 22 speaker, 24 incoming lamp, 26 external antenna, 32 rear case, 34A side cover, 34a side cover recess, 42A center of gravity ( Position), 44,46 Air layer, 48 key rubber.

Claims (7)

An antenna for wireless connection with the outside projecting on the surface of the housing, and a notification member provided on the surface of the housing for notifying the user of an incoming wireless call with light, sound, etc. In a portable communication device carried by a user,
In the state where the portable communication device falls and floats on the water surface, the portable communication device is provided with a levitation unit that imparts buoyancy to the portable communication device so that at least the antenna and the notification member are disposed on the water surface.
The levitation means includes an air layer formed inside a casing of the portable communication device ,
The housing includes a rear case in which the antenna projects on the surface and the notification member is provided on the surface, and a front case attached to the rear case.
The portable communication device according to claim 1, wherein the air layer is formed by the back case . A wireless connection antenna externally provided on the surface of the housing, and a notification member provided on the surface of the housing for notifying the user of an incoming wireless call using light, sound, or the like. In a portable communication device carried by
In the state where the portable communication device falls and floats on the surface of the water, the portable communication device is arranged such that the antenna and the notification member are disposed at higher positions than other portions of the portable communication device. Equipped with posture control means for controlling the water surface floating posture of
The portable communication device according to claim 1, wherein the posture control means includes a flooded space formed inside a casing of the portable communication device. The portable communication device according to claim 2 , wherein
In a state where the portable communication device is dropped and floated on the water surface, the portable communication device is arranged so that at least the antenna and the notification member are disposed on the water surface in cooperation with the posture control means. With levitation means to impart buoyancy to
The portable communication device, wherein the levitation means includes an air layer formed inside a casing of the portable communication device. The portable communication device according to any one of claims 2 and 3 ,
The antenna and the notification member are disposed on the upper back of the portable communication device,
The posture control means is closer to the lower front of the portable communication device than the antenna and the notification member, and compared to the center of gravity of the portable communication device when not flooded. Including a submerged space provided near the bottom of the front surface and open to the outside of the portable communication device;
When the portable communication device falls on the surface of the water, the center of gravity of the portable communication device is moved closer to the lower part of the front than the center of gravity when not flooded by allowing water to enter the flooded space. Portable communication device. The portable communication device according to claim 4 , wherein
The flooded space is
A bag-like shape is formed in the gap between the keys by a key rubber to which a plurality of keys provided on the lower half of the front surface of the portable communication device are attached, and receives moisture entering through the gap between the keys. space,
A gap is formed between a microphone cover that covers a microphone provided at a lower front portion of the portable communication device and a front case that is a front side portion of a casing of the portable communication device, and the gap between the microphone cover and the front case. A bag-like space for receiving moisture that enters through the mobile communication device, and a gap between the front case and the side cover for shock-dropping cushioning that covers the side portion of the portable communication device, and the side cover and the front case Of the bag-shaped space that accepts moisture that enters through the gaps,
A portable communication device comprising at least one of the above. The portable communication device according to claim 4 or 5 ,
The portable communication device, wherein the submerged space includes a water passage for discharging water that has entered the submerged space when the portable communication device is lifted onto the water. The portable communication device according to any one of claims 2 to 6 ,
A portable communication device characterized in that a front case which is a front side portion of a casing of the portable communication device is formed of a magnesium alloy .

Images