JP4190967B2 - Mobile terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile terminal device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in small portable terminal devices such as cellular phones and PHS (simple cellular phones), as shown in FIGS. 8 and 9, a single circuit board 1 has a CPU, memory, and RF for controlling system operation. A (Radio Frequency) circuit and the like are mounted, a key switch 2 is mounted, and a display panel 3 such as a liquid crystal display (LCD) is installed on the upper surface side of the circuit board 1, and the circuit board 1 A battery 4 is installed in the lower part of the rear surface side of the battery, and is configured as a single unit. This unit is covered with a housing (not shown).
[0003]
8 and 9, 5 is a connector for the display panel 3 provided on the surface of the circuit board 1, 6 is a cable drawn from the display panel 3, and the cable 6 is connected to the connector 5. It has become so.
[0004]
On the other hand, the substrate is held at a predetermined position in the thickness direction of the case by the cooperation of a spring provided between the substrate and the case and a screw screwed between the substrate and the case. For example, Patent Document 1 discloses an example in which the position in the thickness direction of the case in the case of the substrate is adjusted by adjusting the screwing position.
[0005]
[Patent Document 1]
JP-A-2003-143283 [0006]
[Problems to be solved by the invention]
However, in the portable terminal device as shown in FIGS. 8 and 9, the display panel 3 protrudes on the upper surface side of the circuit board 1 and the battery 4 protrudes on the lower surface side of the circuit board 1, and the thickness T Therefore, there is a structural problem that it is difficult to reduce the thickness of the case when it is attempted to make the outer shape of the casing linear in a side view (straight shape) due to design requirements and the like. .
[0007]
In addition, the portable terminal device disclosed in Patent Document 1 has a very complicated structure and cannot be realized.
[0008]
In view of such circumstances, the present invention intends to provide a portable terminal device that can be thinned without complicating the structure.
[0009]
[Means for Solving the Problems]
In the present invention, a key board configured with a flexible printed circuit board on which a key switch is mounted and a system wireless board mounted with a CPU, a memory, an RF circuit, and the like for controlling system operation are configured on separate boards. Connect
While installing the system wireless board on the back side of the display panel,
On the back side of the key board, a battery that suppresses the bending of the key board is installed,
And said key board and the display panel together with their surfaces arranged to substantially a flat,
Those relating to the mobile terminal device, characterized in that the said battery and said system radio board their backside is disposed so as to become substantially flat.
[0010]
According to the above means, the following operation can be obtained.
[0011]
When configured as described above, the display panel does not protrude from the upper part on the front side of the circuit board, and the battery does not protrude from the lower part on the back side of the circuit board. Therefore, it is possible to reduce the thickness of the casing by making the outer shape of the casing linear (straight) in a side view. In addition, since the battery is installed on the back side of the key board, the key board can be prevented from bending when the key switch is pressed, which is effective in terms of strength. Furthermore, since the surface side of the key switch mounted on the key board is not covered with the battery, the electrical connection line between the key arranged in the housing and the key switch is arranged to bypass the battery, There is no need to open and close the place where the keys of the housing are arranged in order to attach and detach the battery, and there is no worry that the structure will be complicated.
[0012]
In the portable terminal device, the key substrate can be formed of a flexible printed circuit board, which leads to a reduction in the overall weight.
[0013]
The present invention also comprises a key board configured with a flexible printed circuit board on which a key switch is mounted and a system wireless board mounted with a CPU, a memory, an RF circuit, etc. for controlling system operation on separate boards. ,
While installing the system wireless board on the back side of the display panel ,
On the back side of the key board, a battery that suppresses the bending of the key board is installed,
To form a connecting portion between the display panel on the edge surface of the key substrate,
It said forming a connecting portion of the system radio board edges back side of the key board,
And said key board and the display panel together with their surfaces arranged to substantially a flat,
Those relating to the mobile terminal device, characterized in that the said battery and said system radio board their backside is disposed so as to become substantially flat.
[0014]
In this way, in addition to being able to be made thinner than before, a connection portion with the display panel is formed on the surface side of the edge of the key substrate, and on the back side of the edge of the key substrate. By forming the connection portion with the system wireless board, the entire width can be made slim.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
1 to 3 show a first example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 8 and 9 denote the same components, and the basic configuration is as follows. Although similar to the conventional one shown in FIG. 8 and FIG. 9, the feature of this example is that, as shown in FIG. 1 to FIG. The system wireless board 8 on which the CPU, the memory, the RF circuit, etc. for controlling the system are mounted and electrically connected by another board, the system wireless board 8 is installed on the back side of the display panel 3, and the key The battery 4 is installed on the back side of the substrate 7, the display panel 3 and the key substrate 7 are arranged so that the surfaces thereof are substantially flat, and the back side of the system radio board 8 and the battery 4 is substantially flat. It is at the point of arrangement.
[0017]
In the illustrated example, a flexible cable 9 drawn out from the system radio board 8 is connected to a connector 10 for the system radio board 8 provided on the back surface of the key board 7, and from the display panel 3. The drawn flexible cable 6 is connected to a connector 5 ′ for the display panel 3 provided on the back surface of the key substrate 7.
[0018]
Next, the operation of the illustrated example will be described.
[0019]
If configured as described above, the display panel 3 does not protrude from the upper part on the front side of the circuit board 1 and the battery 4 does not protrude from the lower part on the back side of the circuit board 1, so that it is avoided that the thickness t increases. It is possible to reduce the thickness of the casing by making the outer shape of the casing linear (straight) as viewed from the side due to design requirements.
[0020]
In addition, since the battery 4 is installed on the back side of the key substrate 7, when the key switch 2 is pressed, the deflection of the key substrate 7 is suppressed, and the strength is also effective.
[0021]
Furthermore, since the surface side of the key switch 2 mounted on the key board 7 is not covered with the battery 4, the battery 4 bypasses the electrical connection line between the key arranged in the housing and the key switch 2. There is no need to arrange or open / close the place where the keys of the casing are arranged in order to attach and detach the battery 4, and there is no fear of complicating the structure.
[0022]
Thus, the thickness can be reduced without complicating the structure.
[0023]
4 and 5 show a second example of the embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 3 denote the same parts, and the key substrate 7 is flexible. It consists of a printed circuit board.
[0024]
The key board 7 formed of the flexible printed board is formed so as to be drawn out from the system radio board 8 and the display panel 3 and is integrated with the system radio board 8 and the display panel 3.
[0025]
As described above, if the key board 7 is formed of a flexible printed board, the thickness t can be reduced without complicating the structure, and the overall weight can be reduced.
[0026]
If the key board 7 is composed of a flexible printed board, there is a concern that the key board 7 will bend more than the normal board when the key switch 2 is pressed. It is reliably suppressed by the battery 4 installed in the.
[0027]
6 and 7 show a third example of the embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 3 denote the same parts, and the key switch 2 is mounted. The key board 7 and the system wireless board 8 on which the CPU, memory and RF circuit for controlling the system operation are mounted as separate boards, and the system wireless board 8 is arranged on the back side of the display panel 3. Then, a connector 5 as a connection portion with the display panel 3 is formed on the front surface side of the edge portion of the key substrate 7, and a connector 10 as a connection portion with the system wireless board 8 is provided on the back surface side of the edge portion of the key substrate 7. The display panel 3 and the key board 7 are arranged so that the surfaces thereof are substantially flat, and the system radio board 8 and the battery 4 are arranged so that the back surfaces thereof are substantially flat.
[0028]
In this way, the thickness t can be reduced as compared with the conventional case, and in addition, the connector 5 as the connection portion with the display panel 3 is formed on the surface of the edge of the key substrate 7. By forming the connector 10 as a connection portion with the system radio board 8 on the back surface side of the edge portion of the key board 7, the entire width can be made slim.
[0029]
In addition, the portable terminal device of the present invention is not limited to the above illustrated example, and can be applied to a foldable portable terminal device. Of course, various changes can be made.
[0030]
【The invention's effect】
As described above, the present invention separates a key board formed of a flexible printed board on which a key switch is mounted and a system wireless board on which a CPU, a memory, an RF circuit, and the like for controlling system operation are mounted. It consists of a board and is electrically connected,
While installing the system wireless board on the back side of the display panel,
On the back side of the key board, a battery that suppresses the bending of the key board is installed,
And said key board and the display panel together with their surfaces arranged to substantially a flat,
Since the said battery and said system radio board their backside is disposed so as to substantially become flat, without complicating the structure, an excellent effect of obtaining walled.
[Brief description of the drawings]
FIG. 1 is a side view of a first example of an embodiment of the present invention.
FIG. 2 is a front view of a first example of an embodiment for carrying out the present invention.
FIG. 3 is an exploded front view showing a key board, a display panel, and a system wireless board in a first example of an embodiment of the present invention for each unit;
FIG. 4 is a side view of a second example of an embodiment of the present invention.
FIG. 5 is a front view of a second example of the embodiment for carrying out the present invention;
FIG. 6 is a side view of a third example of the embodiment for carrying out the present invention.
FIG. 7 is a front view of a third example of the embodiment of the present invention.
FIG. 8 is a side view of a conventional example.
FIG. 9 is a front view of a conventional example.
[Explanation of symbols]
2 Key switch 3 Display panel 4 Battery 5 Connector (connection part)
6 Cable 7 Key board 8 System wireless board 9 Cable 10 Connector (connection part)

Claims (2)

A key board configured with a flexible printed circuit board on which a key switch is mounted and a system wireless board mounted with a CPU, memory, RF circuit, etc. for controlling system operation are configured on separate boards and electrically connected. ,
While installing the system wireless board on the back side of the display panel,
On the back side of the key board, a battery is installed that suppresses bending of the key board
And said key board and the display panel together with their surfaces arranged to substantially a flat,
Mobile terminal device, characterized in that the said battery and said system radio board their backside is disposed so as to become substantially flat. A key board configured with a flexible printed circuit board on which a key switch is mounted and a system wireless board mounted with a CPU, memory, RF circuit, etc. for controlling system operation are configured on separate boards.
While installing the system wireless board on the back side of the display panel ,
On the back side of the key board, a battery is installed that suppresses bending of the key board
To form a connecting portion between the display panel on the edge surface of the key substrate,
It said forming a connecting portion of the system radio board edges back side of the key board,
And said key board and the display panel together with their surfaces arranged to substantially a flat,
Mobile terminal device, characterized in that the said battery and said system radio board their backside is disposed so as to become substantially flat.

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