JP2004080389A - Mobile communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication terminal wherein a speaker facing a mounting surface not only prevents deterioration in the sound quality but also extends spread of sound to a surrounding space so as to comparatively uniformly deliver the sound to the surrounding. <P>SOLUTION: In the mobile communication terminal having sounding holes of a speaker section 28 generating a ringer tone at the backside of a case 20, the case 20 has a projection 30 wherein the sounding holes of the speaker section 18 are formed to be nearly uniformly floated from the flat mounting surface 40 to at least both sides of the case 20 when the backside of the case 20 is placed on the flat mounting surface 40. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable communication terminal device having a sound emission port of a speaker that generates a ring tone on the rear side of a housing.
[0002]
[Prior art]
A mobile communication terminal device represented by a mobile phone (also simply referred to as a mobile communication terminal or a terminal) generally has a speaker for generating a ring tone on the back side of a housing. Therefore, when the terminal is placed on a desk or the like, the sound emission port of the speaker faces the placement surface. This is considered to be caused by a problem of a space margin for arranging the speakers and a necessity of seeing a sound emission opening of the speakers for recognition of a sound such as a ringtone.
[0003]
[Problems to be solved by the invention]
FIG. 2 shows a side view of a conventional two-fold type mobile phone in which an upper housing and a lower housing are connected via a hinge portion. When the speaker unit is placed on a mounting surface such as a desk in a folded state as shown in the drawing, the speaker unit abuts or approaches the mounting surface, and the sound emission of the sound emitted from the sound output port is obstructed. However, there is a problem that the sound quality is deteriorated. Similarly, when the speaker comes into contact with or comes close to the mounting surface, the magnetism of the speaker may cause adsorption of a magnetic substance and entry of dust or the like into many holes provided in the sound emission port. The same applies to a so-called stick type mobile phone.
[0004]
In a mobile phone in which a part of the housing is raised to accommodate an antenna unit or the like, the speaker unit may rise from the mounting surface when placed on a desk or the like. There is a problem that the size of the open space, which is formed between them, and through which the sound from the speaker is transmitted is deviated in some directions, so that it does not necessarily spread around the periphery in a well-balanced manner.
[0005]
The present invention has been made in such a background, and its purpose is to not only prevent the sound quality from being deteriorated, but also to enlarge the spread of sound to the surrounding space for the speaker facing the mounting surface, and It is an object of the present invention to provide a portable communication terminal device capable of transmitting sound equally to the surroundings.
[0006]
[Means for Solving the Problems]
A portable communication terminal device according to the present invention is a portable communication terminal device having a sound emission port of a speaker that generates a ringtone on the back side of a housing, wherein the housing has a flat mounting surface on the back side. When the speaker is placed on the housing, the sound emission opening of the speaker has a projection formed on at least both sides of the housing so as to be substantially evenly raised from the placement surface.
[0007]
Another portable communication terminal device according to the present invention is a portable communication terminal device having a speaker sound emitting port for generating a ring tone on the back side of a housing, wherein the housing has a flat mounting surface on the back side. When placed on the speaker, the sound emission port of the speaker rises from the placement surface, and has a protruding portion formed so as to form a space that is almost uniformly opened on at least both sides of the housing. And
[0008]
Still another mobile communication terminal device according to the present invention is a two-fold type mobile communication terminal device in which an upper housing and a lower housing are connected via a hinge, and an incoming call is received on the back side of the lower housing. The speaker has a sound emission port for generating sound, and the lower housing, when the back side thereof is mounted on a flat mounting surface, the sound emission opening of the speaker rises from the mounting surface described above. And a projection formed to form a substantially uniform open space at least on both sides of the housing.
[0009]
The protrusion may be a part of the housing or a member added to the housing.
[0010]
In any portable terminal device, preferably, an antenna member is housed in the protrusion. When there are a plurality of protrusions, it is sufficient to house the antenna in at least one of them, and there may be a protrusion in which the antenna member is not housed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, a mobile phone will be described as an example of the mobile communication terminal device of the present invention.
[0012]
FIG. 1 shows a configuration of a mobile phone according to a first embodiment of the present invention. FIG. 1A is a front view of a state of being folded and placed on the placement surface 40, and FIG. 1B is a view of the state seen from behind. FIG. 1C is a view of the state as viewed from the side. This is a two-fold type mobile phone in which an upper housing 10 and a lower housing 20 are foldably connected via a hinge 15. In the present specification, the “view from the front” is a view as viewed from the hinge 15 side. The mobile phone of the present embodiment has a protruding portion 30 at the front end of lower housing 20, that is, at the side of hinge 15. As shown in FIG. 1A, the protrusion 30 extends across the width of the housing. The protruding portion 30 linearly contacts the mounting surface 40 at its lower end. The lower end of the lower end of the lower housing 20 is also in linear contact with the mounting surface 40. Therefore, the mobile phone is stably mounted on the flat mounting surface 40. As can be seen from the side view of FIG. 1C, a space is formed between the lower housing 20 and the mounting surface 40 when the mobile phone is mounted on the mounting surface 40. . This space forms an opening 63 symmetrical on both sides of the housing, that is, of the same size and shape.
[0013]
As a result, the sound emitted from the speaker unit 18 having the sound emission opening in the space can be spread evenly to the left and right through the openings 63 on both sides. Although the sound spread is not necessarily equal in the left-right direction and the front-back direction, this configuration makes it possible to transmit sound to the surroundings more evenly than in the related art. In addition, since a predetermined distance is maintained between the sound output port of the speaker unit 18 and the mounting surface 40, the magnetic substance is attracted by magnetism, and dust and the like are adhered to a large number of holes provided in the sound output port. Entry is reduced.
[0014]
3A and 3B are schematic side views of the two-fold type mobile phone shown in FIG. 1, wherein FIG. 3A shows a state where an upper housing is opened, and FIG. 3B shows a state where it is closed (folded). Is shown. A liquid crystal display unit 13 is provided on a main surface inside the upper housing 10, and a keyboard surface 17 is provided on a main surface inside the lower housing 20. An antenna is disposed in a protruding portion 30 protruding diagonally upward on the outer side in the vicinity of the hinge portion 15 of the lower housing 20.
[0015]
FIGS. 4A and 4B show examples of installation of antenna elements that can be considered in this mobile phone. In each case, the state of arrangement of the antenna elements in the protruding portion 30 is schematically shown from the outside.
[0016]
In the configuration of FIG. 4A, as shown in FIG. 4E, in order to separate the linear or plate-shaped (thin plate-shaped) antenna element 52 from the ground 56 in the lower housing as much as possible, the antenna element 52 Are arranged along the inner wall of the surface (A) 31 shown in FIG. Although it depends on the target free space radiation characteristics and bandwidth of the antenna, it is generally considered that the antenna is arranged in this way when the antenna Q is made as low as possible to obtain (increase) the band. Conceivable. However, as shown in FIG. 4A, the surface (A) 31 is most likely to be caught by the user's hand or finger. Therefore, when the hand or finger is caught on the antenna portion, as shown in FIG. 4C. It is considered that the antenna surface is covered with a finger, and the antenna characteristics are greatly deteriorated.
[0017]
Therefore, preferably, as proposed by the present applicant in Japanese Patent Application No. 2002-161078, the configuration and arrangement of the antenna elements as shown in FIGS. 4B and 4D are employed. However, this is not an essential requirement for the present invention. 4 (b) and 4 (d), the antenna element 50 is formed in a crank shape including a plate-shaped element portion 53 on the feeding point side and a plate-shaped element portion 54 connected to the side on the tip side. The angle formed between the element portion 54 and the element portion 53 is a predetermined angle. The “predetermined angle” is substantially a right angle in this example, but is not necessarily limited to a right angle. In the present embodiment, both element portions 53 and 54 are formed by bending an intermediate portion of a crank-shaped sheet metal (conductive plate-shaped member) along a boundary between the two portions. However, the two separated element parts 53 and 54 may be conductively joined. Further, it may be formed of metal foil instead of sheet metal. In this example, the element portion 53 on the power supply point side is arranged along the inner wall surface of the surface (A) 31 which is the top surface of the protruding portion 30, and only the element portion 54 on the open end side is caught by the user's hand or finger. It is configured to be arranged along the inner wall surface of the hard surface (B) 32. This is because, in general, even with one antenna element, the characteristics of a high-impedance portion are more deteriorated when covered with a hand or finger than a low-impedance portion. Therefore, the open end portion of the antenna, which is a high impedance portion, can escape from the user's hand / finger. Here, “escape” means a state in which the degree of the antenna surface facing the hand or finger is small. This degree is minimized when the angle formed by the main surface of the antenna with the hand or finger surface is at or near a right angle. That is, in a state where the user's hand or finger is closest to the open end side of the antenna element from the outside of the housing in the open state, the main surface of the antenna element is at least over a predetermined length on the open end side. At right angles or close to this. In addition, according to this structure, the antenna element 50 is not arranged on the entire surface of the surface (B) 32 but is also arranged on the surface (A) 31 side. Antenna bandwidth degradation is also suppressed.
[0018]
FIG. 5 shows a configuration of a mobile phone according to the second embodiment of the present invention. This is similar to the mobile phone of the first embodiment, but differs in the following points. That is, the protrusion 61 at the hinge-side end of the lower housing 20 is divided into two parts, and the opening 62 is formed on the mounting surface 40 therebetween. While the protruding portions 30 of the first embodiment are in linear contact with the mounting surface 40, each protruding portion 61 of the present embodiment is in a so-called point contact with the mounting surface 40. The end of the lower housing 20 opposite to the hinge portion is in direct contact with the mounting surface without any protrusion. Forming symmetrical openings 63 on both sides is the same as in the first embodiment. An example in which elements 16 such as a sub display unit and an incoming LED are arranged on the outer main surface of the upper housing 10 is shown. However, this element 16 is not essential in the present invention. The same applies to other embodiments. Note that, unlike the first embodiment, the antenna according to the present embodiment is divided into two protruding portions, so that an antenna member such as a helical antenna can be fixedly arranged on at least one of them. Thereby, the space occupied by the protruding portion can be effectively used. Also in the following embodiments, it is possible to accommodate or arrange the respective antennas as described in the first or second embodiment depending on the form of the protrusion.
[0019]
In this embodiment, the space below the speaker unit 18 is open (opened) in three directions, front and left and right, so that sound can be transmitted to the surroundings in a more balanced manner than in the first embodiment. It becomes.
[0020]
FIG. 6 shows a configuration of a mobile phone according to the third embodiment of the present invention. This is similar to the mobile phone of the second embodiment, but differs in the following point. In other words, the lower housing 20 has the protruding portion 64 at the end opposite to the hinge-side end. As a result, on the mounting portion 40, symmetrical openings 65 are formed on both sides and substantially symmetrical openings 62 are also formed in the front-rear direction. In this embodiment, since the space below the speaker unit 18 is open in four directions of front, rear, left, and right, it is possible to transmit sound to the surroundings in a more balanced manner than in the second embodiment.
[0021]
FIG. 7 shows a configuration of a mobile phone according to the fourth embodiment of the present invention. This is similar to the mobile phone of the third embodiment, but differs in the following point. That is, the lower housing 20 has the projections 81 and 82 extending in the width direction at both ends on the side opposite to the hinge and on the opposite side. Thus, symmetrical openings 84 are formed on both sides of the mounting portion 40. In this embodiment, since the space below the speaker unit 18 is open in two directions, left and right, it is possible to transmit sound to the surroundings in a more balanced manner than before.
[0022]
FIG. 8 shows a configuration of a mobile phone according to the fifth embodiment of the present invention. This is similar to the mobile phone of the first embodiment, but differs in the following points. That is, the lower housing 20 has the protrusion 81 extending in the width direction at the end opposite to the hinge-side end. The hinge-side end of the lower housing 20 is in direct contact with the mounting surface without any protrusion. Thus, symmetrical openings 94 are formed on both sides of the mounting portion 40. In this embodiment, since the space below the speaker unit 18 is open in two directions, left and right, it is possible to transmit sound to the surroundings in a more balanced manner than before.
[0023]
FIG. 9 shows a configuration of a mobile phone according to the sixth embodiment of the present invention. This is similar to the mobile phone of the fifth embodiment, but differs in the following points. In other words, the lower housing 20 has two protruding portions 101 at an end opposite to the hinge-side end. The hinge-side end of the lower housing 20 is in direct contact with the mounting surface without any protrusion. Thus, the opening 63 is formed symmetrically on both sides of the mounting portion 40, and the opening 62 is formed on the rear side. In this embodiment, since the space below the speaker unit 18 is open in the three directions on the left and right, it is possible to transmit sound to the surroundings in a more balanced manner than in the fifth embodiment. .
[0024]
FIG. 10 shows a configuration of a mobile phone according to the seventh embodiment of the present invention. This is a mobile phone having a protrusion 116 for accommodating the whip antenna 114, and a protrusion 111 of the same size corresponding to this protrusion is provided on the opposite side. The projection 111 does not accommodate an antenna. Note that the antenna 114 may be a fixed antenna that cannot be extended. With this configuration, the mobile phone can be stably mounted on the mounting surface 40, and the symmetrical openings 112 on both sides of the mounting surface 40 where the space facing the speaker unit 18 is connected to the periphery. A front opening 62 is formed. That is, the space facing the speaker unit 18 is open in three directions: the opening 62 and the two openings 112. Therefore, it is possible to transmit sound to the surroundings in a sufficiently balanced manner as compared with the related art.
[0025]
FIG. 11 shows a configuration of a mobile phone according to the eighth embodiment of the present invention. This is not a folding type but a so-called stick type mobile phone. There is a projection 113 divided into two on the rear end side of the housing, that is, on the side opposite to the side where the liquid crystal display unit 13 is located. The protruding portion 113 forms an opening 62 opened rearward on the mounting surface 40 and an opening 105 opened symmetrically on both sides. That is, the space facing the speaker unit 18 is open in three directions: the opening 62 and the two openings 105. Therefore, it is possible to transmit sound to the surroundings in a sufficiently balanced manner as compared with the related art. In this embodiment, the protrusion 113 may be formed so as to extend in the width direction of the housing.
[0026]
Although the preferred embodiments of the present invention have been described above, various modifications and changes other than those described above can be made without departing from the technical idea.
[0027]
【The invention's effect】
According to the portable terminal device of the present invention, the presence of the predetermined protrusion allows the device to be stably mounted on the mounting surface, and for the speaker facing the mounting surface, merely prevents sound quality deterioration. Instead, the spread of the sound to the surrounding space can be expanded, and the sound can be transmitted relatively uniformly to the surroundings.
[Brief description of the drawings]
FIG. 1 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to a first embodiment of the present invention.
FIG. 2 is a side view of a conventional two-fold type mobile phone in which an upper housing and a lower housing are connected via a hinge portion.
3A and 3B are side views (a) and (b) of the two-fold type mobile phone shown in FIG. 1 when the terminal is opened and closed.
4 (a) to 4 (f) show an example of installation of an antenna of the mobile phone shown in FIG. 1;
FIG. 5A is a front view, FIG. 5B is a rear view, and FIG. 5C is a side view showing a configuration of a mobile phone according to a second embodiment of the present invention.
FIG. 6 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to a third embodiment of the present invention.
FIG. 7 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to a fourth embodiment of the present invention.
FIG. 8 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to a fifth embodiment of the present invention.
FIG. 9 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to a sixth embodiment of the present invention.
FIG. 10 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to a seventh embodiment of the present invention.
FIG. 11 is a front view (a), a rear view (b), and a side view (c) showing a configuration of a mobile phone according to an eighth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Upper case, 13 ... Liquid crystal display part, 20 ... Lower case, 15 ... Hinge, 18 ... Speaker part, 30, 61, 64, 81, 82, 101, 111, 113, 116 ... Projection part, 40 ... Placement surface, 62, 63, 65, 84, 94, 105, 112 ... Opening

Claims (6)

In a portable communication terminal device having a sound emission port of a speaker that generates a ring tone on the back side of the housing,
The housing is formed such that, when the rear side thereof is placed on a flat mounting surface, the sound emission openings of the speaker are almost evenly lifted from the mounting surface on at least both sides of the housing. A portable communication terminal device having a projected portion. The mobile communication terminal device according to claim 1, wherein an antenna member is housed in the protrusion. In a portable communication terminal device having a sound emission port of a speaker that generates a ring tone on the back side of the housing,
When the housing is placed on the flat mounting surface on the back side, the sound emission port of the speaker floats up from the mounting surface, and is almost equally opened to at least both sides of the housing. A mobile communication terminal device having a protrusion formed to form a space. The mobile communication terminal device according to claim 3, wherein an antenna member is housed in the protrusion. In a two-fold type mobile communication terminal device in which an upper housing and a lower housing are connected via a hinge portion,
On the back side of the lower housing has a sound emission port of a speaker that generates a ringtone,
When the lower housing is mounted on a flat mounting surface on the back side, the sound emission opening of the speaker rises from the mounting surface described above, and is substantially even on at least both side portions of the housing. A portable communication terminal device having a protrusion formed to form an open space. The mobile communication terminal device according to claim 5, wherein an antenna member is housed in the protrusion.

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