JP2002125021A - Portable radio terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a portable radio terminal which provides a better receiving sensitivity of its antenna, when it is mounted on a conductor surface such as desks, etc. SOLUTION: A portable telephone having its upper frame 12 and lower frame 13 closed face to face with center at a hinge mechanism 11 comprises protrusions 31, 32 provided at specified positions on the downside of the lower frame 13 having a whip antenna 14 attached to one end 34 of the frame 13. This floats up the antenna-mounted one end 34 of the lower frame 13 from the surface of a metal-made desk 21 with the opposite end 33 resulting in a support point. The antenna 14 is more distant from the conductor surface such as desk, etc., than with no protrusions 31, 32 provided, Thus its sensitivity can be more high.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio terminal having a portable size such as a portable telephone or a portable communication device and having an antenna protruding outside. The present invention relates to a portable wireless terminal in which deterioration is prevented.

[0002]

2. Description of the Related Art In many cases, a portable wireless terminal such as a portable telephone is placed on its own desk or a table during a meeting while waiting for communication.

FIG. 18 to FIG. 20 show the appearance of a portable telephone as an example of a conventional portable radio terminal, of which FIG.
2 and a state where the lower housing 13 is opened. FIG. 19 is a side view of the mobile phone in an open state. The lower housing 13 has a whip antenna 14 disposed at the end on the side where the hinge mechanism is attached, so as to be able to expand and contract. In a state of carrying out a call while holding the mobile phone in hand, the sensitivity is increased by extending the whip antenna 14. FIG. 20 shows the back of the mobile phone, and the surface of the lower housing 13 to which the whip antenna 14 is attached is flat.

[0004]

When such a conventional portable telephone is placed on a conductor such as a desk or a table (hereinafter abbreviated as "desktop") in a state of waiting for communication, it receives radio waves. However, there is a problem that the operation may not be performed well.

FIG. 21 shows a state where the portable telephone is placed on a desk. A mobile phone is placed on a metal desk 21 with the upper housing 12 facing upward and the lower housing 13 in contact with the desk 21. In this state, the whip antenna 14 is in a state of approaching the desk 21.

FIG. 22 is an enlarged view of the vicinity of the whip antenna indicated by the two-dot line 23 in FIG.
In the lower housing 13 to which the whip antenna 14 is attached, the entire surface of the back surface 24 reaching the end where the whip antenna 14 is attached is in contact with the surface 21S of the desk 21. Therefore, the whip antenna 14 is close to the desk 21 up to a portion provided with a function as an antenna similarly as indicated by a broken line. As a result, most of the radio waves to be received by the whip antenna 14 are absorbed by the metal desk 21.
For this reason, the sensitivity of the whip antenna 14 is relatively reduced, and it is not possible to receive the radio waves satisfactorily, or an amplifying circuit having a large amplification factor is required to receive the radio waves. There was a problem that waste occurred.

Of course, even when transmission is performed using the whip antenna 14, as a result of the fact that a large part of the transmitted radio wave is absorbed by the desk 21, transmission cannot be performed efficiently, and wasteful transmission power is reduced. There was a problem of needing. The above is a problem with a foldable portable wireless terminal or a portable telephone, but a similar problem also occurs with an unfoldable integrated portable wireless terminal.

Note that, depending on the device, the surface on the side facing the desk is not necessarily flat due to the presence of components such as an antenna, and there may be some unevenness. However, even in this case, there still exists a problem that the sensitivity of the antenna is deteriorated by the desk.

Therefore, in Japanese Unexamined Patent Publication No. Hei 11-337016, a decorative chain attachment connected to a portable radio terminal has a stand function. Then, the decorative chain attachment is inserted between a plane such as a desk and the portable wireless terminal so that the portable wireless terminal is arranged obliquely. This is to solve the problem that the display becomes difficult to see when the portable wireless terminal is placed on a flat surface such as a desk.

FIG. 23 shows a state in which the decorative chain attachment according to this proposal is attached to a portable telephone. Since the decorative chain attachment 25 is disposed between the lower housing 13 and the metal desk 21, the problem that the whip antenna 14 is lifted up and the sensitivity of the antenna is deteriorated as a result can be solved. . However, in this proposal, it is necessary to always carry a decorative chain attachment 25 as shown in this figure. Also, in order to keep the sensitivity of the whip antenna 14 good, the decorative chain attachment 25 must be attached to a predetermined position such as the center of gravity of the lower housing 13 of the mobile phone before the desk 2
It was necessary to arrange them at 1 mag, which was troublesome. Further, there is a case where the sensitivity of the antenna is determined to be poor by not using the decorative chain attachment tool 25 or by setting it incorrectly as shown in FIG. 23 even if it is used.

On the other hand, in Japanese Patent Application Laid-Open No. H11-249557, a space for accommodating a pen is provided in a rear portion corresponding to the end of the housing of the portable radio terminal on the side where the antenna is arranged, so that a protruding portion is provided. The antenna is used to separate the antenna from the desk. In this proposal, a door (stand) that can be opened and closed is attached to the back of the housing of the portable wireless terminal, and the antenna is separated from the conductor surface by placing it on a desk or the like with the door open and standing. ing.

However, in this proposal, when a space for accommodating a pen is provided, the outer shape of the device becomes larger and heavier only at that portion. Therefore, there is a problem that portability as a portable wireless terminal is impaired.
In addition, when a door that can be opened and closed is attached, it is necessary to always stand the portable radio terminal when placing it on the surface of a desk or the like. There was a problem that it was necessary to take quick action together. Also, there is a demand for the stand to be lightweight, and in many cases, the stand lacks durability, which shortens the life of the product.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable radio terminal which can improve the sensitivity of an antenna while being placed on a conductor surface such as a desk, and which is not bulky and troublesome to handle as a whole device. Is to provide.

[0014]

According to the first aspect of the present invention, (a) a housing accommodating a communication circuit therein;
(B) a communication antenna arranged so as to protrude from one end of the housing; and (c) an antenna arranged with a predetermined point on the opposite side of the housing from the side where the antenna is arranged as a fulcrum. The portable wireless terminal is provided with a projection disposed on a part of the surface on which the housing is placed on a desk or the like so that the end on the side is raised at a slight angle.

That is, according to the first aspect of the present invention, the end of the side where the antenna is disposed is provided with a predetermined point on the side opposite to the side where the antenna is disposed as a fulcrum. The projections are provided so as to float at a slight angle. Then, when the housing is placed on the upper surface of the desk or the like, the antenna is separated from the conductor portion of the desk or the like by an amount that is lifted up by the projection about the fulcrum so that the antenna has a better sensitivity.

According to the second aspect of the present invention, (a) the first and second housings, which can be opened and closed by a hinge mechanism,
(B) a communication antenna disposed so as to protrude from one end of one of the first and second housings;
(C) The housing on which the antenna for communication is arranged is arranged such that the end on the side where the antenna is arranged is raised at a slight angle with a predetermined point opposite to the side where the antenna is arranged as a fulcrum. The portable wireless terminal is provided with a projection disposed on a part of the surface on the side to be folded and a surface on the opposite side of the body.

That is, according to the second aspect of the present invention, a projection is provided on the side of the two housings that are opened and closed by the hinge mechanism, on which the antenna is provided, of the housing on which the antenna is provided.
The end on the side where the antenna is arranged is raised at a slight angle with a predetermined point on the side opposite to the side where the antenna is arranged of the housing as a fulcrum. Then, when the housing is placed on the upper surface of the desk or the like, the antenna is separated from the conductor portion of the desk or the like by an amount that is lifted up by the projection about the fulcrum so that the antenna has a better sensitivity.

According to a third aspect of the present invention, in the portable wireless terminal according to the first or second aspect, the projection is formed integrally with the housing.

That is, the invention according to claim 3 is characterized in that the projection provided for keeping the antenna away from the upper surface of the desk or the like is integrally formed of resin or metal. Since it is an integral type, the number of man-hours does not increase and the projection does not fall off.

According to a fourth aspect of the present invention, in the portable wireless terminal according to the first or second aspect, the projection is fixed to the housing.

In other words, according to the fourth aspect of the present invention, the projection provided to keep the antenna away from the upper surface of the desk or the like is fixed with an adhesive or the like. As a result, it is possible to attach or remove the projection as desired by the user.

According to a fifth aspect of the present invention, in the portable wireless terminal according to the first or second aspect, the projection is attached to the housing as a screw blind cap.

That is, according to the fifth aspect of the present invention, the screw blind cap used to hide the screw is made to protrude more than usual, or the mounting position of the screw is adjusted in relation to the projection, so that the original screw is hidden. The sensitivity of the antenna can be improved only by attaching the screw blind cap.

According to a sixth aspect of the present invention, in the portable wireless terminal according to the first or second aspect, the predetermined location is an end of the housing opposite to the side where the antenna is arranged. It is characterized by.

In other words, in the invention according to the sixth aspect, the location which becomes the fulcrum of rotation or inclination of the housing by the projection is provided if the surface of the housing facing the upper surface of the desk or the like is flat. It is a cautionary note that the end is on the opposite side to the side that was marked. If the surface of the housing facing the upper surface of the desk or the like is not such a flat surface but is a curved surface, it is natural that the fulcrum changes accordingly.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

First Embodiment

FIG. 1 is a side view of a portable telephone as a portable wireless terminal according to a first embodiment of the present invention, and FIG. 2 is a rear view of the portable telephone.
In the present embodiment, the same parts as those in FIGS. 18 to 22 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. Further, since the view of the mobile phone of the present embodiment as viewed from the front with the open state is the same as that of FIG. 18, the illustration is omitted.

FIGS. 1 and 2 show the portable telephone of this embodiment.
As shown in the figure, the lower housing 13 has a structure in which projections 31 and 32 are arranged at two places on the back surface near the hinge mechanism 11 side. In the present embodiment, these projections 31 and 32 are
3 are formed integrally with each other, and are arranged at two places with an interval so as to be stable in a state where the mobile phone is placed on a desk or the like. The heights of the projections 31 and 32 themselves are 1 to several millimeters, and do not particularly affect the appearance.

FIG. 3 shows a state in which the portable telephone of this embodiment is placed on a desk. Projections 31 and 32 project from the lower housing 13. Therefore, in the lower housing 13, the end 34 on the side where the whip antenna 14 is attached is raised from the surface of the metal desk 21 with the end 33 on the side opposite to the hinge mechanism 11 as a fulcrum.

FIG. 4 is an enlarged view of the vicinity of the whip antenna indicated by the two-dot line 36 in FIG. State back 24 of the lower housing 13 is lifted from the surface of a metal desk 21 by the projections 31 and 32, the spacing S ₁ between the lower end of the whip antenna 14 in the arrangement state of the portable telephone shown in FIG. 22 It is expanding more. This enlargement amount is only a few millimeters, but the rate of increase from the state close to the desk 21 is large. Therefore, it is possible to sufficiently prevent the sensitivity of the whip antenna 14 from deteriorating.

Second Embodiment

FIG. 5 is a side view of a portable telephone as a portable wireless terminal according to a second embodiment of the present invention, and FIG. 6 is a rear view of the portable telephone.
In the present embodiment, the same parts as those in FIGS. 18 to 22 or FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. A view of the mobile phone according to the present embodiment as viewed from the front with the mobile phone open is the same as that in FIG.

As shown in FIGS. 5 and 6, the mobile phone according to the second embodiment is elongated on the back surface of the lower housing 13 near the hinge mechanism 11 in a direction perpendicular to the direction in which the whip antenna 14 expands and contracts. The band-shaped projection 41 is adhered. The projecting amount of the elongated band-shaped projection 41 is almost equal to that of the first embodiment.

FIG. 7 shows a state where the portable telephone of this embodiment is placed on a desk. A band-shaped projection 41 protrudes from the lower housing 13. Therefore, in the lower housing 13, the end 34 on the side where the whip antenna 14 is attached is raised from the surface of the metal desk 21 with the end 33 on the side opposite to the hinge mechanism 11 as a fulcrum.

FIG. 8 is an enlarged view of the vicinity of the whip antenna indicated by the two-dot line 42 in FIG. State back 24 of the lower housing 13 is lifted from the surface of a metal desk 21 by the strip protrusions 41, spacing S ₂ between the lower end of the whip antenna 14 in the arrangement state of the portable telephone shown in FIG. 22 It is expanding more. This enlargement amount is only a few millimeters, but the rate of increase from the state close to the desk 21 is large. Therefore, it is possible to sufficiently prevent the sensitivity of the whip antenna 14 from deteriorating.

Third Embodiment

FIG. 9 is a side view of a portable telephone as a portable wireless terminal according to a third embodiment of the present invention, and FIG. 10 is a rear view of the portable telephone. In the present embodiment, the same parts as those in FIGS. 18 to 22 or FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. A view of the mobile phone according to the present embodiment as viewed from the front with the mobile phone open is the same as that in FIG.

The portable telephone of the third embodiment has a hinge mechanism 11 of a lower housing 13 as shown in FIGS.
Screw blind caps 51 and 52 at two places on the back near the side
Are arranged. Screw blind cap 5
Numerals 1 and 52 are attached to the upper part of the mobile phone in order to hide the screws used in the lower housing 13 in response to a request on the external design of the mobile phone. Screw blind cap 5
The numerals 1 and 52 also have a meaning of removing a screw (not shown) arranged in a lower part thereof to prevent the mobile phone from being disassembled without permission. In general, the screw blind cap may be sheet-shaped, but in the case of the present embodiment, the screw blind cap has a shape protruding to some extent from the periphery so as to have the same role as the projections 31 and 32 of the first embodiment. I'm using

FIG. 11 shows a state where the portable telephone of this embodiment is placed on a desk. Screw blind caps 51 and 52 protrude from the lower housing 13. Therefore, in the lower housing 13, the end 34 on the side where the whip antenna 14 is attached is raised from the surface of the metal desk 21 with the end 33 on the side opposite to the hinge mechanism 11 as a fulcrum.

FIG. 12 is an enlarged view of the vicinity of the whip antenna indicated by the two-dot line 54 in FIG.
The rear surface 24 of the lower housing 13 has screw blind caps 51, 5
2 is lifted from the surface of the metal desk 21 and the whip antenna 14
The distance S ₃ between the lower end of which is enlarged as compared with the state shown in FIG. 22. This expansion is only a few millimeters,
The rate of increase from a state close to the desk 21 is large. Therefore, it is possible to sufficiently prevent the sensitivity of the whip antenna 14 from deteriorating.

Fourth Embodiment

In the above-described embodiment, the foldable mobile phone has been described. However, even in the case of an integrated mobile phone, it is possible to prevent the antenna sensitivity from deteriorating in a state where the mobile phone is mounted on a desk by similar measures.

FIG. 13 is a front view of the mobile phone according to the fourth embodiment, and FIG. 14 is a side view of the mobile phone. FIG. 15 shows the mobile phone as viewed from the back. In the mobile phone according to the fifth embodiment, a display 61 and various operation keys 62 on a main body 60 are provided.
Second surface (rear surface) 64 opposite to first surface 63 on which
On the side, two protrusions 65 and 66 are arranged near the end where the whip antenna 14 is arranged.

FIG. 16 shows a state in which the mobile phone according to the fourth embodiment is placed on a desk. Also in this case, the main body 60 is connected to the end 33 opposite to the whip antenna 14.
The end 34 on the side where the whip antenna 14 is attached is raised from the surface of the metal desk 21 with the fulcrum as a fulcrum.

FIG. 17 is an enlarged view of the vicinity of the whip antenna indicated by the two-dot line 68 in FIG.
The second surface 64 of the body 60 is lifted from the surface of a metal desk 21 by the two projections 65 and 66, the spacing S ₄ between the lower end of the whip antenna 14 in the arrangement state of the mobile phone shown in FIG. 22 It is larger than the state. This enlargement amount is only a few millimeters, but the rate of increase from the state close to the desk 21 is large. Therefore, it is possible to sufficiently prevent the sensitivity of the whip antenna 14 from deteriorating.

The protrusion 6 for the integrated portable telephone is described above.
Although the case where 5 and 66 are provided has been described, the antenna may be separated from the conductor to prevent the sensitivity from deteriorating by another method similar to that of the foldable mobile phone. Further, it goes without saying that the present invention can be similarly applied to various portable wireless terminals other than the portable telephone.

Further, in the above embodiments, the antenna is shown as being telescopic, but it may be of a fixed type. In this case, even if the antenna is built in, at least a part is exposed to the outside. Is also good. In the embodiment, the protrusion 3
Although the height of 1, 32 is set to 1 to several millimeters, the height may be shorter or longer, and it is natural that the height is not particularly limited.

[0050]

As described above, claims 1 to 6 are described.
According to the invention described above, the antenna can be separated from the conductor such as the desk by an amount that is lifted up by the projection around the fulcrum when the housing is placed on the upper surface of the desk or the like. And a large part of the rear surface of the housing is separated from the upper surface of the desk or the like even if it is slightly, so that the air permeability is improved and the deterioration of the communication circuit portion due to humidity can be prevented. . In addition, since only the projection is provided on the housing so that the end on the side where the antenna is disposed is raised at a slight angle, the entire device does not become large or heavy. Also, since only the projection is provided on the housing, it is specially suitable for placing the portable wireless terminal on a desk or the like, lifting the portable wireless terminal from the state of being placed on the desk, etc., and carrying it or making a call There is no need to perform a complicated operation, and there is no room for a problem such as a decrease in sensitivity due to forgetting the operation.

According to the third aspect of the present invention, since the projection is formed integrally with the housing, the number of steps for manufacturing does not increase, and the projection does not fall off.

Further, according to the fourth aspect of the present invention, since the projection is fixed to the housing with an adhesive or the like, the projection can be attached or detached as desired by the user.

According to the fifth aspect of the present invention, the screw blind cap used to hide the screw is made to protrude more than usual, or the mounting position of the screw is adjusted in relation to the projection, The sensitivity of the antenna can be improved only by attaching the original screw blind cap.

[Brief description of the drawings]

FIG. 1 is a side view showing a side surface of a mobile phone according to a first embodiment of the present invention.

FIG. 2 is a rear view showing a rear surface of the mobile phone according to the first embodiment.

FIG. 3 is a partial cross-sectional view illustrating a state in which the mobile phone according to the first embodiment is placed on a desk.

FIG. 4 is an enlarged partial cross-sectional view showing the vicinity of a whip antenna indicated by a two-dot line in FIG. 3;

FIG. 5 is a side view showing a side surface of a mobile phone according to a second embodiment of the present invention.

FIG. 6 is a rear view showing a rear surface of the mobile phone according to the second embodiment.

FIG. 7 is a partial cross-sectional view illustrating a state in which the mobile phone according to the second embodiment is placed on a desk.

8 is an enlarged partial cross-sectional view of the vicinity of a whip antenna indicated by a two-dot line in FIG. 7;

FIG. 9 is a side view showing a side surface of a mobile phone according to a third embodiment of the present invention.

FIG. 10 is a rear view showing a rear surface of the mobile phone according to the third embodiment.

FIG. 11 is a partial cross-sectional view illustrating a state in which the mobile phone according to the third embodiment is placed on a desk.

FIG. 12 is an enlarged partial cross-sectional view showing the vicinity of a whip antenna indicated by a two-dot line in FIG. 11;

FIG. 13 is a front view showing the front of a mobile phone according to a fourth embodiment of the present invention.

FIG. 14 is a side view showing a side surface of a mobile phone according to a fourth embodiment.

FIG. 15 is a rear view showing a second surface of the mobile phone according to the fourth embodiment.

FIG. 16 is a partial cross-sectional view illustrating a state in which the mobile phone according to the fourth embodiment is placed on a desk.

FIG. 17 is an enlarged partial cross-sectional view of the vicinity of a whip antenna indicated by a two-dot line in FIG.

FIG. 18 is a plan view showing a state where an upper housing and a lower housing of a conventional portable wireless terminal are opened.

19 is a side view of the conventional portable wireless terminal shown in FIG. 18 as viewed from the side.

20 is a rear view of the conventional portable wireless terminal shown in FIG. 18 as viewed from the rear.

FIG. 21 is a partial cross-sectional view showing a state where the conventional mobile phone shown in FIG. 18 is placed on a desk.

FIG. 22 is an enlarged partial cross-sectional view showing the vicinity of a whip antenna indicated by a two-dot line 23 in FIG.

FIG. 23 is a side view of a mobile phone equipped with a conventionally proposed decorative chain attachment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Hinge mechanism 12 Upper case 13 Lower case 14 Whip antenna 21 Desk (made of metal) 31, 32, 65, 66 Projection 33 End part opposite to hinge mechanism 41 Band-like projection 51, 52 Screw blind cap 60 Main body 64 2nd surface (back)

Claims (6)

[Claims] 1. A housing in which a communication circuit is housed, a communication antenna disposed so as to protrude from one end of the housing, and an opposite side of the housing in which the antenna is provided. And a projection disposed on a part of a surface on which the housing is placed on a desk or the like such that an end on the side where the antenna is disposed is lifted at a slight angle with a predetermined point on the side as a fulcrum. A portable wireless terminal characterized by the above-mentioned. 2. A first housing and a second housing which can be freely opened and closed by a hinge mechanism, and a communication device arranged so as to protrude from one end of one of the first and second housings. An antenna and an end of the side where the antenna is arranged are lifted at a slight angle with a predetermined point opposite to the side where the antenna is arranged as a fulcrum. A portable wireless terminal, comprising: a projection disposed on a part of a surface of a body on a side to be folded and a surface on an opposite side. 3. The portable wireless terminal according to claim 1, wherein the projection is formed integrally with a housing. 4. The portable wireless terminal according to claim 1, wherein the projection is fixed to a housing. 5. The portable wireless terminal according to claim 1, wherein the projection is attached to a housing as a screw blind cap. 6. The portable wireless terminal according to claim 1, wherein the predetermined location is an end of the housing opposite to the side on which the antenna is arranged.