JPH11186822A - Mobile terminal device - Google Patents

Abstract

(57) [Problem] To provide a portable terminal device having a fixed antenna, which can be easily mounted and prevented from falling off. SOLUTION: After fixing the antenna 20, even if the screw thread 24 of the antenna 20 is loosened and the screw thread 24 comes off from the inner thread 33, the length L2 of the space 34 is longer than the width L1 of the screw thread 24. The thread 24 does not screw with the thread 32. For this reason, unless the antenna 20 is intentionally turned and pulled out, the screw thread 32 serves as a stopper, and the screw thread 24 remains in the space 34. At this time, the antenna 20
Becomes unstable, so that the user can immediately recognize that the screw of the antenna 20 is loosened. At this time, the screw thread 32 on the insertion portion 31a side serves as a stopper, so that the antenna 20 does not easily come off from the insert bush 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal device having a fixed antenna, and more particularly to a portable terminal device having an antenna fixed to a main body case with screws.

2. Description of the Related Art In a wireless communication type portable terminal device such as a cellular phone, an antenna is indispensable for transmitting and receiving radio waves. In addition, as the size and weight of the mobile terminal device are reduced, a smaller, lighter and more reliable antenna is required.

[0003]

2. Description of the Related Art There are two types of antennas for wireless communication type portable terminal devices: a drawer type and a fixed type. The drawer type is composed of an antenna top, an element part, and a fixing bracket. The metal fitting is fixed by tightening into a screw hole of an insert bush fixed to the main body case. However, the drawer-type antenna is disadvantageous for miniaturization and weight reduction because the antenna top, the element portion, and the metal fitting are separate parts.

On the other hand, a fixed type antenna has an antenna top and an element part which are integral with each other and need only be screwed and fixed to a main body case. Therefore, the size and weight can be reduced, and the efficiency of mounting work can be improved. Good.

[0005]

However, since the conventional fixed antenna is fixed to the main body case with screws, there is a risk that the screws may be loosened and fall off during use. Also, there is one that fixes the antenna with adhesive from the inside of the main body case to prevent falling off,
The workability at the time of assembling is poor, and there is a problem that the main body must be replaced when the antenna breaks down.

[0006] The present invention has been made in view of the above points, and it is an object of the present invention to provide a portable terminal device which can be easily mounted and can prevent the antenna from falling off.

[0007]

According to the present invention for achieving the above object, as shown in FIG. 1, in a portable terminal device having a fixed antenna, a mounting shaft 23 and a shaft on a peripheral surface of the mounting shaft 23 are provided. An antenna 20 having a thread 24 formed to have a predetermined width along the core direction, and a mounting hole 31 into which a mounting shaft 23 of the antenna 20 can be inserted.
A first screwing portion 32 formed near the insertion portion 31a of the mounting hole 31 and capable of screwing with the screw thread 24 of the mounting shaft 23; An insert bushing 30 formed with a screwing portion 32 and a second screwing portion 33 formed at an interval equal to or greater than the predetermined width and capable of screwing with the screw thread 24 of the mounting shaft 23;
And a portable terminal device characterized by having the following.

In such a portable terminal device 10, the mounting shaft 23 of the antenna 20 is inserted into the mounting hole 31 of the insert bush 30, and the screw thread 24 and the first screw portion 32 are inserted.
And screwed together. When the mounting shaft 23 is further inserted, the distal end of the mounting shaft 23 once enters a portion of the mounting hole 31 where the screw portion 32 is not provided. And
When the mounting shaft 23 is further pushed in from here, the screw shaft 24 reaches the second screwing portion 33, so that the screw thread 24 is
Screw. Thereby, the antenna 20 can be fixed.

On the other hand, when the thread 24 of the antenna 20 is loosened and detached from the second screw portion 33 after the attachment, the thread 2
The four portions are located between the first screw portion 32 and the second screw portion 33. At this time, since the antenna 20 becomes unstable, the user notices that the screw of the antenna 20 is loosened. At this time, since the first screw portion 32 serves as a stopper, the antenna 20 does not fall off the insert bush 30.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a front view showing a configuration example of the mobile phone according to the first embodiment of the present invention. FIG. 3 is a side view of the mobile phone according to the first embodiment. The mobile phone 10 is generally covered by an upper body case 11 and a lower body case 12. In the upper body case 11 part, as shown in FIG.
Mainly, liquid crystal panel 13, key operation unit 14, audio output unit 1
5 and a sound collecting unit 16 are provided. LCD panel 1
3 displays a telephone number message input by the key operation unit 14 and the like. The voice output unit 15 outputs the voice, ringing tone, and the like of the other party. On the other hand, the voice of the user is collected by the sound collection unit 16. As shown in FIG. 3, an earphone unit 17 is provided on a side surface of the upper body case 11. By connecting the earphone, sound can be heard with the earphone.

Upper body case 11 and lower body case 12
As shown in FIG.
Is provided. The volume controller 18 includes, for example, two switches 18a and 18b. When the switch 18a is pressed, the volume increases, and when the switch 18b is pressed, the volume decreases.

The lower body case 12 includes a battery section 19.
Is provided. The battery unit 19 can be attached and detached as needed. Also, the lower body case 12
, A fixed antenna 20 is attached.

FIG. 4 is a diagram showing a specific configuration of a mounting portion of the antenna 20 of the first embodiment. Here, a state in which the upper body case 11 is detached and a part of the lower body case 12 is shown in a cross section is shown. A tubular fixing portion 121 is formed in the lower body case 12, and the insert bush 30 is fixed to an inner side surface 121 a thereof.
The insert bush 30 is made of metal and is electrically connected to a transmission / reception circuit on the main body side. The antenna 20 is screwed and fixed to the insert bush 30. The antenna 20 is mounted such that the antenna top 21 is exposed to the outside and the boss 22 is inserted into the fixing portion 121.

FIG. 5 is a partial sectional view showing a specific configuration of the antenna 20 of the first embodiment. Inside the antenna top 21 of the antenna 20, a coil-shaped antenna member 211 is provided.
Is stored. On the other hand, a metal mounting shaft 23 protrudes from the boss portion 22. This mounting shaft 23
Are electrically connected to the antenna member 211. Further, a screw thread 24 having a diameter larger than that of the other portions is formed at a tip end of the mounting shaft 23 by a predetermined width L1.

FIG. 6 shows an insert bush 3 of the first embodiment.
FIG. 2 is a side cross-sectional view showing a specific configuration of No. 0. A mounting hole 31 through which the mounting shaft 23 of the antenna 20 can be inserted is formed in the insert bush 30. That is,
The diameter of the mounting hole 31 is determined by the mounting shaft 23 of the antenna 20.
Is formed to have a size equal to or larger than the diameter of the thread portion 24 of FIG.
In the vicinity of the insertion portion 31a of the mounting hole 31, a screw thread 32 that can be screwed with the screw thread 24 of the mounting shaft 23 is formed. Further, a screw thread 33 which can be screwed with the screw thread 24 is formed at a further depth side of the mounting hole 31 with a space 34 having a predetermined length L2.

The length L2 of the space 34 is provided to be larger than the width L1 of the thread 24 of the mounting shaft 23. Next, the insert bush 30 having such a configuration will be described.
A specific structure for attaching the antenna 20 to the antenna will be described.

FIG. 1 is a partial sectional view showing a specific structure for mounting the antenna 20 to the insert bush 30 according to the first embodiment of the present invention. When attaching the antenna 20 to the insert bush 30, the insert bush 3
The threaded portion 24 of the mounting shaft 23 is inserted into the insertion portion 31a of No. 0 and screwed with the threaded portion 32 on the insertion port side. Then, the screw is further screwed deeper than the screw thread 32, passes through the space 34, and is screwed to the screw thread 33 on the deeper side. As a result, the antenna 20 is fixed to the lower body case 12.

On the other hand, after fixing the antenna 20, the antenna 2
0 screw 24 is loosened and the screw 24
Is removed, the length L2 of the space 34 is equal to the width L1 of the thread 24.
The thread 24 is not screwed with the thread 32 because it is longer. For this reason, unless the antenna 20 is intentionally turned and pulled out, the screw thread 32 serves as a stopper,
The thread 24 remains in the space 34. At this time, the antenna 20 is in an unstable state.
It is immediately apparent that the 0 screw has become loose. At this time, the screw thread 32 on the insertion portion 31a side serves as a stopper, so that the antenna 20 does not easily come off from the insert bush 30. Therefore, the antenna 20 can be fixed by a simple mounting operation such as screwing, and the subsequent dropping and loss can be reliably prevented.

Next, a second embodiment of the present invention will be described. FIG. 7 is a side sectional view showing the configuration of the insert bush according to the second embodiment of the present invention. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. As with the insert bush 30 of FIG. 6, the insert bush 40 has a mounting hole 41 through which the mounting shaft 23 of the antenna 20 of FIG. 5 can be inserted. In the vicinity of the insertion portion 41a of the mounting hole 41, a coil member 42 that can be screwed with the screw thread 24 of the mounting shaft 23 is inserted and fixed so as not to be easily removed. Further, on the far side of the mounting hole 41, a predetermined length L3
The screw thread 4 which can be screwed with the screw thread 24 with a space 44 of
3 are formed.

The length L3 of the space 44 is provided to be larger than the width L1 of the thread 24 of the mounting shaft 23. In the insert bush 40 having such a configuration,
The mounting shaft 23 of the antenna 20 is inserted from the insertion portion 41a, the screw thread 24 is screwed into the coil member 42, and further passes through the space 44 and screwed into the screw thread 43. Thereby, the antenna 20 can be fixed.

After the antenna 20 is fixed, even if the thread 24 of the mounting shaft 23 comes off the thread 43, the coil member 42 functions as a stopper, so that the thread 24 of the mounting shaft 23 stays in the space 44, The antenna 20 does not fall off the insert bush 40.

Although the coil member 42 is provided on the insertion portion 41a side in FIG. 7, the coil member 42 may be provided on the back side and the thread 43 may be provided on the insertion portion 41a side.

Next, a third embodiment of the present invention will be described. FIG. 8 is a partial sectional view showing the configuration of the antenna and the insert bush according to the third embodiment of the present invention. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The antenna 50 of the present embodiment includes:
Antenna top 51, boss 52, and mounting shaft 5
Three. The mounting shaft 53 is formed shorter than the insert bush, and has a thread 53a formed at the tip thereof. In addition, stoppers 54 and 55 having elastic force are attached to an end surface 53 b of the attachment shaft 53. Hook portions 54a, 5b that bend outward from the center, respectively, are provided at the tip portions of the stoppers 54, 55.
5a are formed.

On the other hand, a mounting hole 61 through which the mounting shaft 53 can be inserted is formed in the insert bush 60. In the vicinity of the insertion portion 61a of the mounting hole 61, a screw thread 62 that can be screwed with the screw thread 53a of the mounting shaft 53 is formed.

When the antenna 50 is mounted on the antenna 50 and the insert bush 60 having such a configuration, first, the mounting shaft 53 of the antenna 50 is inserted into the mounting hole 61 of the insert bush 60 and the thread 6
2 is screwed with the screw thread 53a. As a result, the stoppers 54, 55 protrude toward the end face 60a of the insert bush 60, and the hooks 54a, 55a are locked to the end face 60a. Therefore, even if the screwing between the screw thread 53a and the screw thread 62 is slightly loosened, the antenna 50 does not fall off the insert bush 60 by the function of the hook portions 54a and 55a.

Next, a fourth embodiment of the present invention will be described. FIG. 9 is a partial sectional view showing the configuration of the antenna and the insert bush according to the fourth embodiment of the present invention. FIG. 10 is a sectional view taken along line XX of FIG. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 9, the antenna 70 of the present embodiment has an antenna top 71, a boss 72, and a mounting shaft 73. A thread 73a is formed on the boss portion 72 side of the mounting shaft 73. Further, a protruding portion 73b is formed at the tip of the mounting shaft 73.

On the other hand, the insert bush 80 has a mounting hole 81 through which the mounting shaft 73 can be inserted. In the vicinity of the insertion portion 81a of the mounting hole 81, a screw thread 82 that can be screwed with the screw thread 73a of the mounting shaft 73 is formed. The insert bush 80 has holes 80a and 80b facing each other. The pin members 83 are inserted into the holes 80a and 80b.

When mounting the antenna 70 in the antenna 70 and the insert bush 80 having such a configuration, first, the mounting shaft 73 of the antenna 70 is inserted into the mounting hole 81 of the insert bush 80, and the thread 82 is 73a is screwed. Then the hole 80
a and 80b are fixed through the pin member 83.

As a result, as shown in FIG. 10, the pin member 83 comes into contact with the protruding portion 73b, and the rotation of the mounting shaft 73 is prevented. Accordingly, the screw thread 73a is
2 is prevented from being loosened, and the antenna 70 does not fall off from the insert bush 80.

Next, a fifth embodiment of the present invention will be described. FIG. 11 is a partial sectional view showing the configuration of the antenna and the insert bush according to the fifth embodiment of the present invention. In addition,
Here, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The antenna 90 is mounted so that the antenna top 91 is exposed to the outside and the boss portion 92 is inserted into the fixing portion 121. The insert bush 100 has a burr 10
1 is notched. This flap 101
It is appropriately bent inside the insert bush 100.

FIG. 12 shows the insert bush 10 of FIG.
It is a figure which shows the state which made 0 into a cross section. A mounting shaft 93 is formed on the boss 92 of the antenna 90. A thread 93a is provided on the boss 92 side of the mounting shaft 93.
Are formed. Also, on the tip side of the mounting shaft 93,
Further, a stopper portion 93b is cut out at a position facing the barb portion 101 shown in FIG.

On the other hand, a mounting hole 102 through which the mounting shaft 93 can be inserted is formed in the insert bush 100. In the vicinity of the insertion portion 102a of the mounting hole 102, a screw thread 103 that can be screwed with the screw thread 93a of the mounting shaft 93 is formed.

When mounting the antenna 90 in the antenna 90 and the insert bush 100 having such a configuration, first, the mounting shaft 93 of the antenna 90 is inserted into the mounting hole 102 of the insert bush 100 and the screw 93a is screwed together, and the mounting shaft 93 is fastened to the insert bush 100. When the fastening is completed, the stopper portion 93b of the mounting shaft 93 and the barbed portion 101 of the insert bush 100 have a relationship as shown in FIG.

FIG. 13 is a sectional view taken along the line YY of FIG. Direction of tightening the mounting shaft 93 (direction of arrow R in the figure)
, The stopper portion 93b has the burr portion 1
01 does not get caught. Therefore, the mounting shaft 93 can be easily tightened. On the other hand, the mounting portion 9
When it is turned in the direction to remove 3 (in the direction of arrow L in the figure), the barbed portion 101 is caught by the stopper portion 93b, and the rotation of the mounting portion 93 is prevented. Therefore, antenna 9
0 is prevented from falling off.

In the first to fifth embodiments, the example of the portable telephone 10 is shown as the portable terminal device, but other portable terminal devices such as an electronic organizer can be applied.

[0037]

As described above, according to the present invention, a mounting hole formed in the antenna is formed in the insert bush so that the mounting shaft can be inserted therein, and the first and second screwing portions and the second screwing are formed in the mounting hole. Since the portions are formed at a predetermined interval, even if the screw thread of the antenna is loosened and detached from the second screwing portion on the back side after mounting, the screw thread portion is formed with the first screwing portion and the second screwing portion. Since the antenna is located at the portion between the screw portions, the user easily notices that the antenna is in an unstable state and the screw of the antenna is loosened. Also, at this time, since the first screw portion serves as a stopper, it is possible to prevent the antenna from falling off the insert bush and being lost.

Accordingly, the antenna can be fixed by a simple mounting operation such as screwing, and the falling-off and loss can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a specific mounting structure of an antenna to an insert bush according to a first embodiment of the present invention.

FIG. 2 is a front view showing a configuration example of a mobile phone according to the first embodiment of the present invention.

FIG. 3 is a side view of the mobile phone according to the first embodiment.

FIG. 4 is a diagram showing a specific configuration of a mounting portion of the antenna of the first embodiment.

FIG. 5 is a partial cross-sectional view illustrating a specific configuration of the antenna according to the first embodiment.

FIG. 6 is a side sectional view showing a specific configuration of the insert bush of the first embodiment.

FIG. 7 is a side sectional view showing a configuration of an insert bush according to a second embodiment of the present invention.

FIG. 8 is a partial sectional view showing a configuration of an antenna and an insert bush according to a third embodiment of the present invention.

FIG. 9 is a partial cross-sectional view illustrating a configuration of an antenna and an insert bush according to a fourth embodiment of the present invention.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a partial sectional view showing a configuration of an antenna and an insert bush according to a fifth embodiment of the present invention.

FIG. 12 is a view showing a state in which the insert bush of FIG. 11 is formed in a cross section.

FIG. 13 is a sectional view taken along line YY of FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cellular phone 11 Upper body case 12 Lower body case 20 Antenna 21 Antenna top 22 Boss 23 Mounting shaft 24 Thread 30 Insert bush 31 Mounting hole 32 Thread (first screw portion) 33 Thread (second screw) Screw space) 34 space

Claims (6)

[Claims] 1. A portable terminal device having a fixed antenna, comprising: an antenna having a mounting shaft, and a screw thread having a predetermined width along a direction of an axis of a peripheral surface of the mounting shaft; A mounting hole into which the mounting axis of the antenna can be inserted,
A first screwing portion formed near the insertion portion of the mounting hole and capable of screwing with a screw thread of the mounting shaft; and a first screwing portion on the inner side of the mounting hole and the predetermined width. A portable terminal device comprising: an insert bush that is formed at the above-mentioned interval and has a second screw portion that can be screwed with the screw thread of the mounting shaft. 2. The portable terminal device according to claim 1, wherein the first screwing portion and the second screwing portion are screw threads. 3. The portable terminal device according to claim 1, wherein one of the first screwing portion and the second screwing portion is a coil member, and the other is a screw thread. 4. A mobile terminal device having a fixed antenna, wherein: an antenna having a mounting shaft, a stopper member provided at a tip of the mounting shaft, and the mounting shaft of the antenna is insertable; A mobile terminal device comprising: an insert bush having a mounting hole shaped such that when the mounting member is inserted, the stopper member is locked to stop the movement of the mounting shaft in the removing direction. . 5. A portable terminal device having a fixed antenna, wherein: a mounting shaft, a screw thread formed on a part of a peripheral surface of the mounting shaft, and a projecting portion formed at a tip of the mounting shaft. And a mounting hole into which a mounting axis of the antenna can be inserted,
An insert bush formed in the mounting hole, and having a threaded portion capable of being screwed with a screw thread of the mounting shaft; by inserting the insert bush into a hole formed in the insert bush, And a pin member that abuts on a portion to prevent rotation of the mounting shaft. 6. A mobile terminal device having a fixed antenna, comprising: an antenna having a mounting shaft on which a screw thread and a stopper are formed on a peripheral surface; a mounting hole into which the mounting shaft of the antenna can be inserted;
A threaded portion formed in the attachment hole and capable of being screwed with the thread of the attachment shaft, when the attachment shaft is rotated in a direction in which the thread and the threaded portion are disengaged,
A locking portion that locks with the stopper portion to stop the rotation;
A portable terminal device comprising: an insert bush having the following.