JP4136533B2 - Mobile communication terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a portable communication terminal apparatus having a speaker sound outlet that generates a ring tone on the back side of a housing.
[0002]
[Prior art]
Generally, a mobile communication terminal device typified by a mobile phone (also simply referred to as a mobile communication terminal or a terminal) generally has a speaker that generates a ringtone on the back side of the casing. Therefore, when the terminal is placed on a desk or the like, the sound outlet of the speaker faces the placement surface. This is considered to be caused by a problem of a spatial margin in which the speakers are arranged, and that it is not necessary to see the sound outlet of the speaker in order to recognize 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. As shown in the figure, when the speaker unit is placed on a mounting surface such as a desk in the folded state, the speaker unit comes into contact with or close to the mounting surface, and the sound emission of the sound emitted from the sound outlet is prevented. There was a problem that the sound quality deteriorated. Similarly, contact or proximity to the mounting surface may cause adsorption of magnetic substance due to the magnetism of the speaker, and intrusion of dust or the like into a large number of holes provided in the sound emission opening. The same applies to so-called stick-type mobile phones.
[0004]
In addition, in a mobile phone in which a part of the casing is raised for accommodating the antenna section and the like, the speaker section may be lifted from the mounting surface when it is mounted on a desk or the like. There is a problem that the size of the open space that is formed between and where the sound from the speaker is transmitted is biased in some directions, so that it does not necessarily spread in a balanced manner.
[0005]
The present invention has been made in such a background, and its purpose is not only to prevent deterioration of sound quality but also to expand the spread of sound to the surrounding space for the speaker facing the mounting surface. An object of the present invention is to provide a mobile communication terminal device that can uniformly transmit sound to the surroundings.
[0006]
[Means for Solving the Problems]
A mobile communication terminal device according to the present invention is a mobile 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. The sound outlet of the speaker has a protruding portion formed so as to be lifted from the mounting surface almost evenly on at least both side portions of the housing.
[0007]
Another portable communication terminal device according to the present invention is a portable communication terminal device having a sound emitting opening of a speaker that generates a ringtone on the back side of the housing, wherein the housing has a flat mounting surface on the back side. The sound outlet of the speaker rises from the mounting surface when mounted on the mounting surface, and has a protruding portion formed so as to form a space that is almost evenly open on at least both sides of the housing. And
[0008]
Still another mobile communication terminal device according to the present invention is a bi-fold type mobile communication terminal device in which an upper housing and a lower housing are connected via a hinge portion, and receives an incoming call on the back side of the lower housing. The speaker has a sound emitting opening for generating sound, and when the lower casing is placed on a flat placing surface, the sound emitting opening of the speaker rises from the placing surface. Further, the present invention is characterized in that it has a protruding portion formed so as to form a substantially uniform open space on at least both sides of the casing.
[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 accommodated in the protruding portion. When there are a plurality of protrusions, it is sufficient to accommodate the antenna in at least one of them, and there may be a protrusion that does not accommodate the antenna member.
[0011]
DETAILED DESCRIPTION OF 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 the configuration of a mobile phone according to a first embodiment of the present invention. FIG. 1A is a view of the state of folding and placing on the placement surface 40 as viewed from the front, and FIG. 1B is a view of the state seen from behind. FIG.1 (c) is the figure which looked at the state from the side. This is a two-fold type mobile phone, and an upper housing 10 and a lower housing 20 are connected via a hinge 15 so as to be foldable. In the present specification, the “view seen from the front” is a view seen from the hinge 15 side. The mobile phone according to the present embodiment has a protrusion 30 on the front end of the lower housing 20, that is, on the hinge 15 side. As shown in FIG. 1A, the protrusion 30 extends in the width direction of the housing. The protrusion 30 is in contact with the mounting surface 40 in a linear shape at the lower end thereof. The rear end side of the lower housing 20 is also in contact with the mounting surface 40 in a linear shape. Therefore, the mobile phone is stably placed on the flat placement surface 40. As can be seen from the side view of FIG. 1C, a space is formed between the lower housing 20 and the placement surface 40 in a state where the mobile phone is placed on the placement surface 40. . This space forms openings 63 that are bilaterally symmetric, that is, of the same size and shape, on both sides of the housing.
[0013]
As a result, the sound emitted from the speaker unit 18 having the sound emission opening in the space can be spread evenly from side to side through the openings 63 on both sides. Although the sound spread is not necessarily equal in the left-right direction and the front-rear direction, this configuration makes it possible to transmit sound to the surroundings more evenly than in the past. In addition, since a predetermined interval is maintained between the sound emission opening of the speaker unit 18 and the mounting surface 40, the magnetic substance is adsorbed by magnetism, dust in a large number of holes provided in the sound emission opening, etc. The approach of the is reduced.
[0014]
FIGS. 3A and 3B are schematic side views of the two-fold type mobile phone shown in FIG. 1, in which FIG. 3A shows a state in which the upper housing is opened, and FIG. 3B shows a state in which it is closed (folded). Is shown. A liquid crystal display unit 13 is installed on the main surface inside the upper housing 10, and a keyboard surface 17 is arranged on the main surface inside the lower housing 20. An antenna is disposed in the protruding portion 30 that protrudes obliquely 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 antenna element installations that can be considered in this cellular phone. In either case, the arrangement of the antenna elements in the protrusion 30 is schematically shown from the outside.
[0016]
In the configuration of FIG. 4A, as shown in FIG. 4E, the antenna element 52 is used to separate the linear or plate-like (thin plate-like) antenna element 52 from the ground 56 in the lower housing as much as possible. Is arranged along the inner wall of the surface (A) 31 shown in FIG. Although it depends on the free-space radiation characteristics and bandwidth of the target antenna, it is generally arranged in this way in consideration of making the antenna Q as low as possible to increase (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, so 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 fingers and the antenna characteristics are greatly deteriorated.
[0017]
Therefore, preferably, the configuration and arrangement of the antenna elements as shown in FIGS. 4B and 4D are adopted as previously proposed by the applicant of the present application in Japanese Patent Application No. 2002-161078. 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 flat element portion 53 on the feeding point side and a flat element portion 54 connected to the side portion on the tip side. The angle formed by 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-like member) along a boundary between both portions. However, the separated element parts 53 and 54 may be conductively joined. Moreover, you may form with metal foil irrespective of sheet metal. In this example, the element portion 53 on the feeding point side is arranged along the inner wall surface of the surface (A) 31 which is the top surface of the protrusion 30, and only the element portion 54 on the open end side is hooked by the user's hand or finger. It is set as the structure arrange | positioned along the inner wall surface of the difficult surface (B) 32. This is because, even in a single antenna element, the characteristic degradation when the part with high impedance is covered with a hand or a finger is larger than the part with low impedance. Therefore, the antenna open end portion which is a high impedance portion can be escaped from the user's hand / finger. Here, “escape” means a state in which the degree of the antenna surface facing the hand or finger becomes small. This degree is the smallest when the angle formed between the main surface of the antenna and the surface of the hand or finger is at a right angle or close thereto. That is, when the user's hand or finger is closest to the open end side of the antenna element from the outside of the open housing, the main surface of the antenna element extends at least over a predetermined length on the open end side of the antenna element. This is a case where the surface is perpendicular or close to the surface. In addition, according to this structure, the antenna element 50 is not arranged on the entire surface (B) 32, but is also arranged on the surface (A) 31 side. Antenna bandwidth degradation can also be 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 an opening 62 is formed on the mounting surface 40 therebetween. The protrusions 30 of the first embodiment are in linear contact with the placement surface 40, whereas the protrusions 61 of the present embodiment are in contact with the placement surface 40 in a so-called dot shape. The end of the lower housing 20 opposite to the hinge portion is in direct contact with the placement surface without a protruding portion. Forming symmetrical openings 63 on both sides is the same as in the first embodiment. An example is shown in which elements 16 such as a sub display unit and an incoming LED are arranged on the main surface outside the upper housing 10. However, this element 16 is not essential in the present invention. The same applies to other embodiments. Note that the antenna in this embodiment differs from the first embodiment in that the protruding portion is divided into two, so that an antenna member such as a helical antenna can be fixedly disposed on at least one of them. Thereby, the occupation space of a protrusion part can be utilized effectively. Also in the following embodiments, it is possible to accommodate or arrange each antenna as described in the first or second embodiment depending on the shape of the protruding portion.
[0019]
In this embodiment, the space below the speaker unit 18 is open (opened) in the front and left and right directions, 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 points. That is, it has the protrusion part 64 divided into 2 in the edge part of the lower housing | casing 20 on the opposite side to the hinge side edge part. Thereby, on the mounting part 40, the symmetrical opening part 65 is formed in both sides, and the substantially symmetrical opening part 62 is formed also in the front-back direction. In this embodiment, the space below the speaker unit 18 is open in four directions, front, rear, left, and right, so that 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 points. That is, it has protrusions 81 and 82 extending in the width direction at both ends on the opposite side to the hinge side end of the lower housing 20. Thereby, 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 opened in two directions, left and right, it is possible to transmit sound to the surroundings with a better balance than in the past.
[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, it has the protrusion part 81 extended in the width direction in the edge part on the opposite side to the hinge side edge part of the lower side housing | casing 20. As shown in FIG. The end of the lower housing 20 on the hinge part side is in direct contact with the mounting surface without a protruding part. Thereby, the symmetrical opening part 94 is formed in the both sides on the mounting part 40. FIG. In this embodiment, since the space below the speaker unit 18 is opened in the left and right directions, it is possible to transmit sound to the surroundings with a better balance than in the past.
[0023]
FIG. 9 shows a configuration of a mobile phone according to the sixth embodiment of the present invention. This is similar to the cellular phone of the fifth embodiment, but differs in the following points. That is, it has the protrusion part 101 divided into two in the edge part on the opposite side to the hinge side edge part of the lower side housing | casing 20. FIG. The end of the lower housing 20 on the hinge part side is in direct contact with the mounting surface without a protruding part. Thereby, on the mounting part 40, the symmetrical opening part 63 is formed in both sides, and the opening part 62 is formed in the rear part side. In this embodiment, since the space below the speaker unit 18 is open in 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 the configuration of a mobile phone according to the seventh embodiment of the present invention. This is a mobile phone provided with a protrusion 116 that accommodates the whip antenna 114, and a protrusion 111 of an equivalent size corresponding to this protrusion is provided on the opposite side. The projecting portion 111 does not accommodate an antenna. Note that the antenna 114 may be a fixed antenna that cannot be stretched. With this configuration, the mobile phone can be stably placed on the placement surface 40, and on the placement surface 40, the symmetrical opening portions 112 on both sides where the space facing the speaker unit 18 is connected to the surroundings, and A front opening 62 is formed. In other words, 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 the sound to the surroundings with a sufficient balance as compared with the conventional case.
[0025]
FIG. 11 shows the configuration of a mobile phone according to the eighth embodiment of the present invention. This is not a folded type but a so-called stick-type mobile phone. A protrusion 113 is 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 protrusion 113 forms an opening 62 opened on the rear side on the mounting surface 40 and an opening 105 opened symmetrically on both sides. In other words, 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 the sound to the surroundings with a sufficient balance as compared with the conventional case. In this embodiment, the protrusion 113 can 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 can be made without departing from the technical idea other than those mentioned above.
[0027]
【The invention's effect】
According to the portable terminal device of the present invention, due to the presence of the predetermined protrusion, the device can be stably placed on the placement surface, and only the sound quality deterioration of the speaker facing the placement surface can be prevented. In addition, the spread of the sound to the surrounding space can be expanded and the sound can be transmitted to the surroundings relatively evenly.
[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.
FIGS. 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 is a diagram (a) to (f) showing an installation example of an antenna of the mobile phone shown in FIG. 1. FIG.
FIG. 5 is a front view (a), a rear view (b), and a side view (c) 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 housing | casing, 13 ... Liquid crystal display part, 20 ... Lower housing | casing, 15 ... Hinge, 18 ... Speaker part, 30, 61, 64, 81, 82, 101, 111, 113, 116 ... Protrusion part, 40 ... Placement surface, 62, 63, 65, 84, 94, 105, 112 ... Opening

Claims (1)

In a two-fold type portable communication terminal device in which the upper housing and the lower housing are connected via a hinge portion,
A speaker sound outlet on the back side of the lower housing;
The lower housing has a predetermined interval between the sound output port of the speaker and the mounting surface when the back side of the lower housing is mounted on a flat mounting surface, and at least of the housing There is a protrusion protruding from the end on the hinge part side so as to form a substantially uniform open space on both sides, and this protrusion extends continuously from the back surface over the entire width of the lower housing. The antenna member is accommodated in the protruding portion,
The antenna member is formed in a crank shape including a first flat plate element portion on the feeding point side and a second flat plate element portion connected to the side portion on the tip side, and an angle formed by both element portions. Is a predetermined angle. A mobile communication terminal device.

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