JP2006109081A - Antenna built-in portable equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna built-in portable equipment which can be miniaturized and made thin and by which rigidity of a main body is secured without deteriorating characteristics of an antenna. <P>SOLUTION: A foldable cellular phone has an upper main body 1 equipped with a display part 5, a lower main body 2 equipped with an operation part 4 and the antenna 6 fixed to the inside of the upper main body 1, upper main body 1 and the lower main body 2 are mutually connected and it is at least openable/closable in a hinge part 3, wherein a projection part 7 to enhance strength is formed on the upper main body surface 10 facing the lower main body 2 at a closed state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention generally relates to a portable device with a built-in antenna, and particularly relates to a portable device with a built-in antenna in which a main body having a display unit and a main body having an operation unit are connected so as to be openable and closable.

  Mobile terminal devices such as mobile phones are rapidly becoming smaller and more functional due to advances in electronic circuit technology. Recently, a device having a terminal function for the Internet and having a display unit with a large screen has been desired. As a mobile phone that meets such needs, the main body is separated into an upper part and a lower part, and these two main bodies are connected to each other in a swingable manner via a connection part called a hinge part, that is, connected to be openable and closable. A foldable mobile phone is provided (for example, see Patent Documents 1 and 3). A schematic diagram of a typical example of a conventional folding mobile phone will be described below with reference to FIG.

  This foldable mobile phone is as follows. That is, i) It is possible to secure a wide area of the operation unit serving as an interface with the user and a display unit that provides characters and other information to the user. ii) When not in use, the size can be reduced by folding. iii) When opened (when unfolded) during use, it is possible to design the distance between the microphone and the receiver so that it is close to the distance between the person's ear and mouth. Can be provided.

  The above foldable mobile phone has secured a lot of demand as it fully meets the above needs by i) to ii) to iii).

  Furthermore, in order to display more information obtained via the Internet, the screen display of mobile phones has been colorized from black and white, and the display screen using liquid crystal or the like constituting the display unit has been enlarged. Is progressing. On the other hand, mobile phones themselves are becoming thinner, smaller and lighter so as not to get in the way when carried. For this reason, it is necessary to obtain mechanical rigidity accompanying reduction in thickness, size and weight.

  The case of the main body of a conventional mobile phone is made of a synthetic resin selected from plastic having a certain degree of strength in order to reduce the thickness, size, and weight. Therefore, when the thickness of the mobile phone is reduced, it is inevitable that the rigidity of the upper body is significantly reduced.

  Further, when the thickness when folded is about 25 mm, the rigidity can be maintained against bending and twisting. However, in the future, when the thickness becomes, for example, 20 mm or less, there arises a situation where the rigidity cannot be maintained against bending and twisting. As a result, for example, bending deformation due to external force causes an increase in mechanical load on the internal circuit components, and as a result, there is a problem that the reliability of the foldable mobile phone is lowered.

  In addition, the foldable mobile phone is a product that has a very high possibility of being dropped compared to other electronic devices because it can be carried around and easily taken in and out. When it falls from the hinge part side, it is possible to absorb the impact at the hinge part, but when it falls from the tip part side of the mobile phone, the impact is concentrated on the upper body or lower body of the mobile phone. The upper body or the lower body will be destroyed.

  In particular, when the display portion formed by the liquid crystal display panel is large, the strength of the upper main body provided with the display portion is reduced, thereby reducing the strength of the entire mobile phone. Is likely to occur.

  In order to obtain such rigidity, for example, Patent Document 2 discloses a configuration in which a metal reinforcing wall is provided in parallel with the wall surface of the main body.

  By the way, a mobile phone needs to be equipped with an antenna in order to perform wireless communication. As this antenna, a so-called whip (storage type) antenna that can be extended and stored so as not to interfere with carrying is widely used (for example, see Patent Documents 1 and 2). The whip antenna is extended and used when the mobile phone is used, and is housed and used inside the mobile phone when the mobile phone is in a standby state (when not in use).

  Specifically, as shown in FIG. 11, the conventional foldable mobile phone has an upper main body 51 and a lower main body 52 connected to each other via a hinge 53 so as to be opened and closed. Further, a whip antenna 56 is disposed in the vicinity of the connection portion of the lower body 52 with the upper body 51. Further, the upper body 51 is provided with a display unit 55. On the other hand, the lower body 52 is provided with an operation unit 54.

  In recent years, there has been a demand for a foldable mobile phone that has a large display portion of the upper main body and a thin thickness when folded from the viewpoint of portability and design.

  However, as shown in FIG. 11, the folding mobile phone having the whip antenna 56 requires a storage mechanism and a storage space (not shown) inside the lower main body 52 when the whip antenna 56 is stored. Therefore, there is a problem in that the space for component arrangement inside the lower main body 52 is compressed, and the miniaturization of the foldable mobile phone is prevented.

  If the thickness of the cellular phone when folded is reduced, the storage mechanism and the storage space thereof protrude from the back surface of the lower body 52 (the surface opposite to the surface on which the operation unit 54 is provided). Therefore, portability deteriorates. Although not shown, when the whip antenna 56 is provided in the upper main body 51, the storage mechanism portion and the storage space thereof are the front surface of the upper main body 51 (the surface opposite to the surface on which the display portion 55 is provided). ) Protrudes from the camera, and the portability also deteriorates.

  Further, as shown in FIG. 11, even when the whip antenna 56 is housed, the tip of the whip antenna 56 protrudes, so that when the user removes the whip antenna 56 from a pocket or a bag, the protruding part is caught. . Moreover, the structure which protruded the whip antenna 56 outside impaired an external appearance, and is restricted in design.

On the other hand, for example, Patent Document 3 describes that in a foldable mobile phone, the antenna is fixed in the lower main body, and thus the whip antenna is fixed by fixing the antenna inside the main body. These problems can be solved.
Japanese Patent Laid-Open No. 2000-41091 (Publication Date: February 8, 2000) JP 2001-69213 A (publication date; March 16, 2001) JP 2003-69441 A (publication date; March 7, 2003)

  However, in a mobile phone in which such an antenna is fixed in the main body, a method of providing a metal reinforcing wall described in Patent Document 3 described above cannot be used as a measure against strength reduction due to thinning.

  This is because, in the configuration in which the antenna is provided inside the main body, the radio wave of the antenna is shielded by the metal reinforcing wall provided in the main body, and the characteristics of the antenna deteriorate.

  The present invention has been made in view of the above problems, and an object of the present invention is to reduce the size and thickness of the antenna and to ensure the rigidity of the main body without deteriorating the characteristics of the antenna. It is to provide a built-in portable device.

  As described above, the mechanical rigidity of the portable device is lowered with the thinning and miniaturization of the main body of the portable device. If a metal reinforcing wall is provided in order to prevent the mechanical rigidity from being lowered, the antenna characteristics deteriorate in the configuration in which the antenna is built in the main body. Therefore, the present inventors have conducted intensive studies in order to reduce the size and thickness of portable devices and to ensure the rigidity of the casing without deteriorating the characteristics of the antenna.

  As a result of this earnest study, the above-mentioned problems have been solved as follows. That is, in order to solve the above-described problem, the portable device with a built-in antenna according to the present invention includes a first main body including a display unit, a second main body including an operation unit, and an interior of the first main body. An antenna fixed to the antenna, and the first main body and the second main body are connected to each other. A protruding portion for increasing the strength is formed on the opposing surface of the first main body which is opposed to the first main body.

  According to the above configuration, the antenna is fixed inside the first main body. This eliminates the need for providing an antenna storage mechanism and an antenna storage space in the housing unlike a portable device with a built-in antenna having a retractable antenna. Accordingly, it is possible to achieve a reduction in thickness and size as compared with a portable device with a built-in antenna provided with a retractable antenna.

  In particular, a protrusion for increasing the strength of the first main body is formed on the facing surface of the first main body that faces the second main body when closed, and the protrusion is formed. At the location, the thickness of the first main body is increased by the amount of protrusion.

  Thereby, even when an external force such as bending and twisting is applied to the first main body, the protrusion prevents the first main body from being broken, and the mechanical strength of the first main body can be increased. By increasing the mechanical strength of the first main body in this way, the mechanical strength of the portable device with a built-in antenna, which is the mechanical strength in the closed state that is not in use, is thus reduced. Without providing a reinforcing wall for reinforcement, the height can be increased, and the necessary rigidity can be ensured without deteriorating the antenna characteristics.

  Therefore, it is possible to provide a portable device with a built-in antenna in which the rigidity of the housing is further secured without deteriorating the antenna characteristics while reducing the thickness and size.

  In the portable device with a built-in antenna according to the present invention, it is preferable that at least a part of the antenna is provided inside the protrusion.

  According to the above configuration, at least a part of the antenna is provided inside the protrusion, so that the mechanical strength of the protrusion can be further increased. Therefore, even when an external force such as bending or twisting is applied to the first main body, higher mechanical strength can be provided as compared with the case of only the protrusions.

  Further, since at least a part of the antenna is provided on the protrusion, the space of the first main body from which the antenna was originally provided is vacant. It is possible to easily mount a component having the above functions.

  In the portable device with a built-in antenna according to the present invention, the protrusion is formed along a tip on the opposite surface opposite to the connection portion and a side end continuous with the tip. Is preferred.

  According to the said structure, the projection part is formed along the front-end | tip part on the opposite side to the said connection part in the said opposing surface, and the side end part which follows this front-end | tip part. Thus, the strength of the outer peripheral portion of the first main body can be effectively increased by providing the protrusion along the outer peripheral portion (tip portion and side end portion) of the opposing surface of the first main body.

  Therefore, the mechanical strength as a whole of the portable device with a built-in antenna can be effectively raised, and the destruction of the portable device with a built-in antenna can be prevented.

  In the portable device with a built-in antenna according to the present invention, a notch for accommodating the protruding portion in the closed state is formed on the facing surface of the second main body facing the first main body in the closed state. It is preferable.

  According to the above configuration, when the portable device with a built-in antenna is closed, the notch in which the protrusion is accommodated is formed on the opposing surface of the second main body that faces the first main body. For this reason, when the portable device with a built-in antenna is closed, the protruding portion fits into the notch. Therefore, when the thickness corresponding to the protrusion provided on the first main body is folded, the entire portable device with a built-in antenna can be offset. That is, the thickness generated by providing the first main body with the protruding portion can be suppressed as a whole portable device with a built-in antenna.

  Furthermore, when the portable device with a built-in antenna is closed, the projecting portion is accommodated in the notch, so that the mechanical strength when the antenna is closed can be increased.

  Further, in the portable device with a built-in antenna according to the present invention, it is preferable that an elastic material is disposed on the bottom of the notch. For example, in a portable device with a built-in antenna that has been thinned when it is folded after use of a call, mail, etc., the thickness of the first main body and the second main body is small, so the portable device with a built-in antenna When folding, there is a problem that the first main body and / or the second main body breaks due to the first main body and the second main body colliding with each other.

  On the other hand, if an elastic material is disposed on the bottom of the notch, the projection of the first body when folded by the elastic material provided on the bottom of the notch of the second body. Although the portion collides with the elastic material, the impact due to the collision is absorbed by the elastic force of the elastic material. Therefore, it is possible to prevent the first main body and the second main body from being destroyed.

  In the portable device with a built-in antenna according to the present invention, it is preferable that the antenna is provided within 2/3 of the distal end side of the first main body.

  In general, when a user makes a call or the like using a portable device with a built-in antenna, cover the second main body provided with the operation unit in the vicinity of the connection portion of the portable device with a built-in antenna. use. For this reason, if the antenna is disposed in the vicinity of the connection portion or inside the second main body, the antenna is blocked by the user's hand during use, which causes a problem that the characteristics of the antenna deteriorate.

  Therefore, it is considered that the antenna is preferably located within 2/3 of the front end side of the first main body that is not covered with the hand even if the vicinity of the connection portion is held. The portion covered with the hand and the portion provided with the antenna do not overlap each other.

  Moreover, in the portable device with a built-in antenna of the present invention, it is preferable that the volume of the protruding portion in the first main body increases as the distance from the tip portion approaches the connecting portion. The first main body becomes weaker against bending and external force as it approaches the connecting portion from the distal end portion. On the other hand, according to the said structure, since the volume is increasing as it approaches the connection part from the said front-end | tip part of a said 1st main body, especially the rigidity by the side of a connection part can be increased.

  In the portable device with a built-in antenna according to the present invention, the first main body and the second main body have a flat plate shape, and the thickness of the second main body is 2 which is the thickness of the first main body. It is preferable that it is twice or more.

  The first main body has a display unit, while the second main body has an operation unit. Therefore, it is necessary to dispose a large number of components such as a battery and a connector in the second main body as compared with the first main body that only needs to include a liquid crystal display panel. According to the above configuration, the second main body having the operation unit is twice as thick as the first main body, so that the necessary parts can be arranged in the second main body.

  In the portable device with a built-in antenna according to the present invention, the weight of the second main body is preferably 1.5 times or more the weight of the first main body.

  The user of the portable device with a built-in antenna operates the first main body including the display unit upward and the second casing including the operation unit downward. According to the above configuration, since the weight of the second main body including the operation unit is 1.5 times or more the weight of the first main body including the display unit, the second main body directed downward is provided. Is heavier. For this reason, the center of gravity of the portable device with a built-in antenna is positioned below (second main body) during operation. Therefore, the user can stably operate the portable device with a built-in antenna.

  As described above, the portable device with a built-in antenna according to the present invention includes a first main body having a display unit, a second main body having an operation unit, and an antenna fixed inside the first main body. The first main body and the second main body are connected to each other, and in the portable device with a built-in antenna that can be opened and closed at least at the connection portion, the first main body facing the second main body in a closed state In this configuration, protrusions for increasing the strength are formed on the opposing surface of the main body.

  Accordingly, since the protrusion for increasing the strength of the first main body is provided on the opposing surface of the first main body facing the second main body in the closed state, the protrusion is fixed to the inside thereof as compared with the conventional case. The antenna can be reduced in thickness and size without deteriorating the characteristics of the antenna, and the rigidity of the first main body of the portable device with built-in antenna and the rigidity of the entire portable device with built-in antenna can be secured. Play.

[Embodiment 1]
An embodiment of the present invention will be described below with reference to FIGS.

  As shown in FIG. 1, a foldable mobile phone (hereinafter simply referred to as “the present phone”) as a portable device with a built-in antenna according to the present embodiment includes an upper main body 1 as a first main body, A lower main body 2 as a main body is connected through a hinge portion 3 as a connection portion so as to be freely opened and closed. The upper main body 1 and the lower main body 2 are both substantially plate-shaped (flat plate-shaped) and have substantially the same shape. Each of the upper main body 1 and the lower main body 2 has a housing provided with a substrate (not shown) on which components are mounted. The casing is made of, for example, a plastic resin such as ABS (Acrylonitrile Butadiene Styrene resin) or PC-ABS (Polycarbonate-Acrylonitrile Butadiene Styrene resin). The antenna according to the present invention is a fixed type, and a so-called whip type is excluded.

  As shown in FIG. 1, the upper body 1 is provided with a display unit 5 constituted by an LCD (Liquid Crystal Display). The display unit 5 displays various information corresponding to various functions of the telephone, such as radio wave reception status, remaining battery level, mail text, and images.

  The upper body 1 is provided with a speaker (not shown). For example, sounds corresponding to various functions of the telephone such as a voice of a communication destination user and a ring tone are output via the speaker.

  On the other hand, the lower body 2 is provided with an operation unit 4 including numeric keys “0” to “9”, a calling key, a redial key, an end key, an e-mail key, and the like. It is possible to input execution commands for various functions such as making a telephone call and creating a mail on the telephone. The lower body 2 is provided with a microphone (not shown). A voice of a caller, an answering machine message, a voice from the outside, and the like are collected through the microphone.

  As described above, the upper main body 1 and the lower main body 2 are connected via the hinge portion 3 so as to be freely opened and closed. Therefore, this telephone can be made into the folding state (closed state; see FIG.5 (b)) which turned the hinge part 3 and united the upper main body 1 and the lower main body 2. FIG. By closing the telephone in this way, the display unit 5 and the operation unit 4 are covered and protected, and can be downsized as compared to the open state as shown in FIG. ing.

  On the other hand, in recent years, a foldable mobile phone such as the present phone is required to be further reduced in size and thickness in the folded state. However, with the conventional configuration, it becomes difficult to maintain the mechanical strength of the telephone as the size and thickness are reduced. In particular, there is a problem that it is difficult to maintain the mechanical strength of the upper body 1 having the display unit 5 made of a liquid crystal display panel.

  Therefore, a configuration in which a mobile phone is provided with a metal reinforcing wall has been known. However, if a metal reinforcing wall is provided on the cellular phone, there is a problem that the antenna housed inside is shielded by the reinforcing wall and the antenna characteristics deteriorate.

  In order to solve these problems, the upper body 1 of the telephone has a protrusion protruding from the upper body surface 10 on the outer peripheral portion of the upper body surface (opposite surface of the first body) 10 as shown in FIG. Part 7 is formed. Here, the upper main body surface 10 is a surface facing the lower main body 2 when the telephone set in the upper main body 1 is folded and closed.

  The protrusion 7 includes an upper end region (tip portion) D, a right end region (side end portion) E, and a left end region (side end portion) F on the side opposite to the hinge portion 3 of the outer peripheral portion of the upper main body surface 10. Partly formed. More specifically, the protrusion 7 is along the upper end region D on the opposite side of the lower main body 2 on the upper main body surface 10 and the right end region E and the left end region F that are continuous with the upper end region D. It is formed in a substantially U shape. In addition, the formation position of the projection 7 is merely an example. For example, the projection 7 may be formed only in the upper end region D.

  In this telephone set, the protrusion 7 replaces a conventional metal reinforcing wall, and the mechanical strength of the upper body 1 can be increased. In other words, this telephone is configured not to use a metal reinforcing wall. Therefore, the radio wave of the antenna 6 is not shielded. Therefore, the mechanical strength of the telephone can be increased without deteriorating the antenna characteristics.

  Further, in the present phone, the projection 7 has an antenna 6 fixed therein. The antenna 6 is made of a metal plate such as Cu and plays a role of mediating with the outside by transmitting and receiving data wirelessly.

  Further, since the antenna 6 is fixed rather than retractable, it is not necessary to provide a storage mechanism portion, an antenna storage space, or the like inside the main body, and the entire telephone can be reduced in thickness and size. . In addition, it is possible to easily mount a part having an existing holding function or a part having a new function to the storage mechanism part and the place where the storage space was originally provided, and the range of utilization is widened. Play. Furthermore, by fixing the antenna 6 to the protrusion 7, the antenna 6 also plays a role of reinforcement, and the mechanical strength of the upper body 1 can be increased as compared with the configuration in which only the protrusion 7 is provided.

  On the other hand, as shown in FIG. 1, the lower main body 2 includes a notch 8 on the outer peripheral portion of the lower main body surface (opposing surface of the second main body) 12. Here, the lower main body surface 12 is a surface facing the upper main body 1 when the telephone in the lower main body 2 is folded and closed. The protrusion 7 is adapted to be accommodated in the notch 8 when the telephone is closed. The cutout 8 is desirably provided from the viewpoint of thinning, but it is not always necessary to provide the cutout 8, and a configuration in which only the protrusion 7 is provided may be employed.

  The notch 8 is formed in a part of the lower end region G, the right end region H, and the left end region I excluding the upper end region on the hinge portion 3 side in the outer peripheral portion of the lower main body surface 12. More specifically, the notch 8 includes a lower end region G opposite to the upper main body 1 on the lower main body surface 12, and a right end region H and a part of the left end region I continuous with the lower end region G. Are formed in a substantially U-shape. Thus, when the telephone is folded, the protrusion 7 is accommodated in the notch 8. Although the thickness of the upper body 1 is increased by providing the protrusion 7 on the upper body 1, the thickness of the upper body 1 can be offset by folding and storing the protrusion 7 in the notch 8.

  By the way, the thickness h2 of the lower main body 2 including the operation unit 4 on which these components are mounted is made thicker than the thickness h1 of the upper main body 1 including the display unit 5 in terms of component arrangement such as a battery and a connector. Is desirable. Moreover, it is preferable that the thickness h2 of the lower main body 2 is more than twice the thickness h1 of the upper main body 1 from the viewpoint of arrangement of parts such as a battery and a connector.

  In terms of operability, stability can be maintained by making the weight of the lower body 2 heavier than the weight of the upper body 1. Therefore, it is preferable that the weight of the lower main body 2 is 1.5 times the weight of the upper main body 1. Also, from the viewpoint of the arrangement of components such as a battery and a connector, it is preferable that the above range, that is, the weight of the lower main body 2 is 1.5 times the weight of the upper main body 1.

  In this telephone, as shown in FIG. 1, the thickness (second body thickness) h2 of the lower main body 2 including the operation unit 4 is about 10 mm, and the thickness of the upper main body 1 including the display unit 5 ( The thickness h1 of the first main body h1 is about 5 mm, and the height h3 of the projection 7 from the upper main body surface 10 is about 1 mm. Although not shown, the distance between the bottom of the cutout 8 and the lower main body surface 12 is substantially the same as h3. In addition, the numerical value shown here is only an example, and is not necessarily limited to these numerical values. Moreover, since FIG. 1 is a schematic diagram showing this device, it does not necessarily match the above dimensions.

  As shown in FIG. 1, a feeding terminal 11 for supplying power to the antenna 6 is housed on the upper end region D side of the upper body 1. The feed terminal 11 is connected to a circuit portion (not shown) of the lower body 2 via a coaxial cable (not shown).

  2A is a partial cross-sectional view in which only the formation portion of the protrusion 7 in AA ′ shown in FIG. 1 is a cross-sectional view, and FIG. 2B is an external shape of the cross-section in BB ′. It is explanatory drawing which shows only. The upper body 1 and the lower body 2 each have a substrate on which components are mounted, but the substrate and the like are omitted in FIGS. 2 (a) and 2 (b).

  Although the length of the antenna 6 varies depending on the frequency of the telephone, etc., in order to further enhance the effect of improving the mechanical strength by providing the protrusion 7, the width of the upper body surface 10 in the short direction (about 50 mm) or more is desirable. Here, the above numerical values are merely examples, and the present invention is not limited thereto.

  By setting the length of the antenna 6 to about 50 mm, the antenna 6 can be formed along the upper end region D (see FIG. 1), as well as the right end region E and the left end region F (continuous to the upper end region D). The antenna 6 can also be formed in FIG. 1), and the antenna 6 can be formed in a substantially U shape. Thus, the mechanical strength of the upper body 1 can be further increased by making the antenna 6 substantially U-shaped.

  Further, the cross-sectional shape of the antenna 6 is preferably an elliptical shape as shown in FIG. 2A rather than a circular shape. By making the cross-sectional shape of the antenna 6 elliptical, the surface area of the antenna 6 becomes larger than that of a circle, and radio wave absorption can be improved. Thereby, the characteristics of the antenna 6 can be improved.

  In addition, by making the cross-sectional shape of the antenna 6 elliptical, the aspect ratio of the antenna 6 becomes larger than that of a circle, and the rigidity of the upper body 1 against torsion can be improved compared to that of a circle.

  Further, by providing the protrusion 7 on the upper body 1, not only the upper body 1 but also the overall mechanical strength of the telephone can be increased. Further, when the telephone is folded, the protrusion 7 is accommodated in the notch 8, so that the rigidity of the lower body 2 against torsion is improved, and the mechanical strength of the entire telephone can be increased.

  Note that the positional relationship among the upper body 1, the antenna 6, and the protrusion 7 shown in FIGS. 1 and 2A and 2B is merely an example, and is not limited thereto. The antenna 6 only needs to be fixed to any part inside the upper body 1, and does not need to be fixed inside the protrusion 7. Further, for example, the antenna 6 is not completely fixed inside the protrusion 7, but a part of the antenna 6 enters the inside of the protrusion 7 as shown in FIG. You may install so that a part may protrude from the projection part 7 and it may be fixed to the inner side of the upper main body 1. FIG. This figure is a schematic view showing a cross section corresponding to FIG.

  As shown in the figure, the aspect ratio of the antenna 6 ′ is made larger than that of the antenna 6 shown in FIG. 2A by including a part of the antenna 6 ′ in the upper main body 1. Can do. Thereby, the improvement of the rigidity with respect to the twist of the upper main body 1 can be obtained effectively. In addition, the mechanical strength of the telephone as a whole can be increased, and when folded, the protrusion 7 ′ of the upper body 1 shown in FIG. 3A is formed in the notch 8 shown in FIG. Therefore, the rigidity of the lower body 2 against torsion is improved, and the mechanical strength of the entire mobile phone can be further increased.

  When the telephone is used, the telephone is opened as shown in FIG. In this way, a portion that is touched by the user's hand when the user makes a call or mail transmission with the telephone set open is any portion of the elliptical C region shown in FIG.

  Here, assuming that the length of the upper body 1 in the longitudinal direction is 1, the length of the C region covering the longitudinal direction of the upper body surface 10 is from the hinge portion 3 in the upper body 1 to the upper end region D. It is about 1/3 or less.

  Further, as shown in FIGS. 5A and 5B, if the length of the upper body 1 in the longitudinal direction is also 1, the region where the protrusion 7 is formed extends from the upper end region D to the hinge portion 3. It is about 2/3 or less.

  That is, in this telephone set, the area C where the user's hand touches and the area where the protrusions 7 are formed do not overlap. Therefore, the user's hand does not touch the protrusion 7 when using the telephone. As a result, the antenna 6 included in the protrusion 7 is also arranged outside the C region as shown in FIG. 4, so that the user's hand covers the antenna 6 fixed inside the protrusion 7. There is nothing. Therefore, the antenna 6 can be prevented from being deteriorated by fixing the antenna 6 inside the protrusion 7 on the surface of the upper body 1.

  In addition, the present inventors investigated the influence on the characteristics of the antenna 6 due to the difference in the shape of the antenna 6 using simulation. FIGS. 6A and 6B show electric field maps when the antenna 6 has a dipole shape and a U-shape (substantially U-shape), respectively. As for the substantially U-shape, assuming a frequency of 800 MHz, the width of the upper body 1 (short length of the upper body surface 10) is 50 mm, and the length of the protrusion 7 extending in the direction perpendicular to the hinge 3 is The antenna 6 was fixed to the inside of the projecting portion 7 by 65 mm per unit.

  It can be seen that when the shape of the antenna 6 is substantially U-shaped, the electric field propagates to the entire periphery of the antenna 6 and exhibits better characteristics as shown in FIG. On the other hand, when the antenna 6 has a dipole shape, as shown in FIG. 6A, the electric field diverges around the feeding terminal 11 and propagation in the length direction of the dipole is reduced. Therefore, propagation of the electric field in the length direction of the dipole becomes unstable.

Further, in the future, when the length of the antenna 6 is shortened by adopting a further high frequency band, and the length of the protruding portion 7 extending in the direction orthogonal to the hinge portion 3 is shortened, the above substantially U-shaped The same characteristics as those of the antenna 6 are shown.
[Embodiment 2]
Another embodiment of the present invention will be described with reference to FIGS. In this embodiment, in order to explain the difference from the first embodiment, for the sake of convenience of explanation, members having the same functions as those described in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Is omitted.

  In the first embodiment, the protrusion 7 has the upper end region D of the upper main body surface 10 and a part of the right end region E and the left end region F that are continuous with the upper end region D (part of 2/3 or less from the upper end region D). ) And a substantially U-shape. However, the present invention is not limited to this, and as shown in FIG. 7, the protrusion 15 includes an upper end region D of the upper main body surface 10, a right end region E and a left end region F (continuous from the upper end region D to the hinge portion). Up to 3 parts).

  Also in this embodiment, the antenna 6 is arranged at the same position as in the first embodiment. As described above, the position that the user touches when using the telephone is the region C shown in FIG. 4, and the user's hand does not cover the antenna 6 portion even with the above configuration. Therefore, the characteristics of the antenna 6 do not deteriorate for the same reason as described above.

  8 (a) and 8 (b) are side views of the foldable mobile phone shown in FIG. 7, and FIG. 8 (a) shows an open state, while FIG. 8 (b) shows a folded state. Is shown. In the foldable mobile phone according to the present embodiment, the protrusion 15 formed on the upper main body 1 increases in volume as it approaches the hinge portion 3 from the upper end region D, as shown in FIG. It is a configuration.

  On the other hand, the notch 16 formed in the lower body 2 is notched as it approaches the hinge part 3 from the lower end region G on the opposite side to the hinge part 3 in the lower body 2 as shown in FIG. In this configuration, the volume of the portion is gradually increased. As shown in FIG. 8 (b), when the foldable mobile phone according to the present embodiment is folded, the protrusion 15 is received in the notch 16.

In general, the thin upper body 1 is weaker against external forces such as bending and twisting on the hinge 3 side. On the other hand, according to the above configuration, the protrusion 15 has a shape that increases in volume as it approaches the hinge portion 3 from the upper end region D of the upper main body 1, and therefore, particularly has high mechanical strength on the hinge portion 3 side. Thus, the rigidity of the upper body 1 can be effectively secured.
[Embodiment 3]
Still another embodiment of the present invention will be described with reference to FIGS. In this embodiment, in order to describe differences from the first embodiment and the second embodiment, a member having the same function as the member described in the first embodiment and the second embodiment is used for convenience of explanation. Are given the same numbers and their explanation is omitted. FIG. 9A is a partial cross-sectional view in which only the formation part of the protrusion in AA ′ of the foldable mobile phone shown in FIG. FIG. 9B is a schematic diagram showing a cross section corresponding to FIG. 2B of the lower main body 2 in the foldable mobile phone according to the present embodiment. FIG. 10 is a schematic diagram showing a cross section of the foldable mobile phone according to the present embodiment in a folded state.

  In the foldable mobile phone according to the present embodiment, as shown in FIGS. 9B and 10, an elastic body 9 as an elastic material is provided at the bottom of the notch 8. The elastic body 9 is made of a resin such as polyimide. According to the present embodiment, since the elastic body 9 having a high elastic modulus such as polyimide is provided at the bottom of the cutout portion 8 of the lower main body 2, the upper main body 1 and the lower main body 2 at the time of folding are provided. Can be absorbed, and the upper body 1 and the lower body 2 can be prevented from being broken.

  Here, the configuration in which the elastic body 9 is provided in the notch 8 of the foldable mobile phone according to the first embodiment is shown, but the notch 16 of the foldable mobile phone according to the second embodiment is shown. It is good also as a structure by which the elastic body 9 is provided.

  Further, in the first to third embodiments, the foldable mobile phone that has one rotating shaft using the hinge portion 3 and opens and closes around the rotating shaft has been described. However, the present invention is not limited to this, and it may have two or more rotation axes and can rotate the upper body 1 and / or the lower body 2 in a plurality of directions.

  The foldable mobile phone according to the present invention is formed in a substantially plate shape, has a substrate on which components are mounted, and folds the upper body and the lower body, which are substantially the same shape, via a hinge portion. A foldable mobile phone that is freely coupled, includes a display unit in the upper body, and includes an operation unit in the lower body. The folding mobile phone includes a protrusion on the periphery of the upper body, and includes an antenna in at least a part of the protrusion. In addition, a cutout portion in which the protruding portion is accommodated when folded may be provided in the peripheral portion of the lower main body.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the operation button, the microphone, and the like may be arranged at any position of the upper main body and the lower main body as long as they fulfill their functions. Further, the length of the protrusion 7 may be equal to the length of the antenna 6 as shown in the first embodiment (see FIG. 1), or as shown in the second embodiment (see FIG. 7). The upper main body surface 10 may be formed so as to cover the upper end region D, right end region E, and left end region F excluding the lower end region on the hinge part 3 side.

  Further, the foldable mobile phone according to the present invention does not require the antenna portion to be installed inside the main body, and the user's hand does not cover the antenna portion during a call, so there is no deterioration of the antenna gain. Furthermore, even if the upper body itself is thinned, rigidity can be ensured without increasing the thickness of the body when folded.

  In addition, the portable device of the present invention is formed in a substantially plate shape, each having a substrate on which components are mounted, and the upper main body and the lower main body, which are substantially the same shape, can be folded and joined freely via a hinge portion. A folding mobile phone that includes a display unit in the upper body and an operation unit in the lower body, and is provided with a protrusion that includes an antenna in the vicinity of the distal end portion around the display unit of the upper body. In the periphery of the part, a notch part may be provided in which the projecting projection part fits when folded.

  This eliminates the need for an antenna mounting space in the main body, thereby enabling the main body to be reduced in size and thickness. Also, during actual voice calls, the user holds the vicinity of the hinge by hand, but there is an antenna only near the tip of the upper body, so the user does not touch the antenna by hand during actual voice calls. There is no degradation of antenna characteristics during a call. Furthermore, the rigidity of the thin display portion can be increased without increasing the thickness at the time of folding.

  The portable device according to the present invention has been described with respect to a foldable mobile phone. However, the present invention is not limited to this, and may be applicable to, for example, a foldable electronic notebook or a television.

  The present invention can be used for, for example, a foldable portable antenna-equipped portable device such as a mobile phone or a personal computer, and can be suitably used particularly for a portable device with a thin display unit.

It is a schematic diagram which shows schematic structure of the foldable mobile telephone of the 1st Embodiment of this invention. (A) is the fragmentary sectional view which made only the formation part of the projection part in AA 'of the foldable portable telephone of 1st Embodiment shown in FIG. 1 into a cross section, (b) is this foldable portable telephone It is explanatory drawing which shows only the external shape of the cross section in BB 'of a telephone. FIG. 2A is a partial cross-sectional view corresponding to FIG. 2A in a foldable mobile phone according to a modification of the first embodiment, and FIG. 2B is a cross-sectional view of FIG. 2B in the foldable mobile phone. It is explanatory drawing corresponding. FIG. 2 is a perspective view illustrating a region that a user touches with a hand in a state where the foldable mobile phone shown in FIG. 1 is opened. (A) is a side view in the state in which the foldable mobile phone shown in FIG. 1 is open, and (b) is a side view in the state in which the foldable mobile phone shown in FIG. 1 is closed. (A) is explanatory drawing which shows the electric field map by simulation when an antenna is pole shape, (b) is explanatory drawing which shows the electric field map by simulation when an antenna shape is U shape. It is a perspective view which shows schematic structure of the foldable mobile telephone of the 2nd Embodiment of this invention. (A) is a side view in the state in which the foldable mobile phone shown in FIG. 7 is opened, and (b) is a side view in the state in which the foldable mobile phone shown in FIG. 7 is closed. FIG. 2A is a partial cross-sectional view corresponding to FIG. 2A in the foldable mobile phone of the third embodiment, and FIG. 2B is a view of FIG. 2B in the foldable mobile phone of the third embodiment. It is explanatory drawing corresponding to (). It is a schematic sectional drawing showing the closed state of the foldable mobile telephone of 3rd Embodiment. It is a perspective view which shows the structure of the conventional foldable mobile telephone.

Explanation of symbols

1 Upper body (first body)
2 Lower body (second body)
3 Hinge part (connection part)
4 Operation part 5 Display part 6 Antenna 6 'Antenna 7 Protrusion part 7' Protrusion part 8 Notch part 9 Elastic body (elastic material)
10 Upper body surface (opposite surface of the first body)
12 Lower body surface (opposite surface of second body)
15 Protrusion 16 Notch D Upper end region (tip)
E Right edge area (side edge)
F Left edge area (side edge)
h1 Upper body thickness (first body thickness)
h2 Lower body thickness (2nd body thickness)

Claims (9)

A first main body including a display unit; a second main body including an operation unit; and an antenna fixed in the first main body; the first main body and the second main body; In the portable device with a built-in antenna that is connected to each other and can be opened and closed at least at the connection portion,
A portable device with a built-in antenna, characterized in that a projecting portion for increasing strength is formed on an opposing surface of the first main body that faces the second main body in a closed state.   The portable device with a built-in antenna according to claim 1, wherein at least a part of the antenna is provided inside the protrusion.   The said protrusion part is formed along the front-end | tip part on the opposite side to the said connection part in the said opposing surface, and the side edge part which continues this front-end | tip part, The Claim 1 or 2 characterized by the above-mentioned. Mobile device with built-in antenna.   The notch part which accommodates the said projection part in a closed state is formed in the opposing surface of the said 2nd main body which opposes the said 1st main body in the closed state, The Claim 1 thru | or 3 characterized by the above-mentioned. The antenna built-in type portable device according to any one of the above items.   The portable device with a built-in antenna according to claim 4, wherein an elastic material is disposed on a bottom portion of the cutout portion.   6. The portable device with a built-in antenna according to claim 1, wherein the antenna is provided within 2/3 of the distal end side of the first main body.   The portable device with a built-in antenna according to any one of claims 1 to 6, wherein a volume of the protruding portion in the first main body increases as the tip portion approaches the connecting portion. .   The first body and the second body are plate-shaped, and the thickness of the second body is more than twice the thickness of the first body. 8. A portable device with a built-in antenna according to any one of 7 above.   The portable device with a built-in antenna according to any one of claims 1 to 8, wherein the weight of the second main body is 1.5 times or more the weight of the first main body.

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