JP2002185224A - Two-stage antenna for mobile telephone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-stage antenna for a mobile telephone which allows the reduction in component cost, efficient assembling work, reduction in defective rate and adjustment rate, and allows a selection of material for a first-stage antenna shaft (antenna top side) and can be reduced in weight by allowing the reduction in thickness of a hollow material (pipe). SOLUTION: The hollow material (pipe) is used for the first-stage antenna (antenna top side) 3. A thin material is used for the second-stage antenna shaft (main body mobile telephone side) for the second-stage antenna shaft to be inserted into the first-stage antenna shaft (antenna top side).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the design and manufacture of a mobile phone antenna.

[0002]

2. Description of the Related Art A conventional two-stage antenna for a mobile phone uses a solid material having a small diameter for a first-stage antenna shaft (antenna top side) and a single-stage for a second-stage antenna shaft (mobile phone main body side). A structure in which the first-stage antenna shaft (antenna top side) can be stored in the second-stage antenna shaft (cell phone body side) using a coil spring having an inner diameter larger than the diameter of the second antenna shaft (antenna top side). Antennas are common. At first glance, the design is smart, but the structure is complicated,
The parts cost is high, the assembly cost is high, and the manufacturing cost is high due to the high rejection rate of the finished product. Furthermore, the weight of the coil spring is heavy, which makes the weight of the two-stage antenna for mobile phones heavy.

[0003]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, assembling can be carried out with a low cost of parts and easy to assemble. The present invention has been devised to study and solve a two-stage antenna for a mobile phone having a new structure.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the conventional structure using a coil spring on the second-stage antenna shaft (on the side of the portable telephone) and to invent another method (structure). Thought. The reason is that the conventional two-stage antenna for a mobile phone slides between a solid material having a small diameter on the first-stage antenna shaft (antenna top side) and the inside of a coil spring on the second-stage antenna shaft (the mobile phone body side). It is required that the tolerance of the inner and outer diameters of the coil spring be made with extremely small tolerances not found in general coil springs in order to make the coil spring smoother and better fit with the antenna holder. You. For this reason, the defect rate of a single coil spring alone and the pulling force judged to be caused by the variation of the inner and outer diameters of the coil spring in an assembled product are likely to vary, and the low yield of the non-defective product lowers the manufacturing cost. This leads to higher prices. Therefore, by using a hollow material (pipe) with good dimensional accuracy of the inner and outer diameters instead of the coil spring used in the conventional two-stage antenna for mobile phones, the dispersion of the pulling force is extremely reduced, and the manufacturing is simplified. We have invented a structure that can be simplified, easy to assemble, and reduce defective products in the assembled product.
In addition, since the lateral load applied to the second-stage antenna shaft (on the mobile phone main body side) truly affects the mobile phone main body via the antenna holder, there is a concern that the mobile phone main body may be damaged. Therefore, a material having low lateral stiffness (flexible) is used for the second-stage antenna axis on the side of the mobile phone body, and the first-stage antenna axis (antenna top side) has little influence on the mobile phone body even if the horizontal stiffness is strong, so the lateral stiffness is small. It is structured to place materials that may be strong. That is, the conventional mobile phone 2
The stage antenna is the first stage antenna axis (antenna top side)
Can be stored in the second-stage antenna axis (mobile phone main body side), whereas the product of the present invention uses the second-stage antenna axis (mobile phone main body side) for the first-stage antenna axis (antenna top side).
It is a structure to be stored inside.

[0005]

[Function] When the two-stage antenna for a mobile phone of the present invention is not used, the second-stage antenna shaft (the side of the mobile phone main body)
The thin solid material of (5) is stored in the hollow material (pipe) of the first stage antenna shaft (antenna top side) (3). In this state, it is attached to the mobile phone main body (6) via the antenna holder (4). When using a two-stage antenna for mobile phones, pick up the antenna top (2) and pull it up. Then, first, the second-stage antenna shaft (on the mobile phone main body side) (5) simultaneously rises while being housed in the hollow material (pipe) of the first-stage antenna shaft (antenna top side) (3). . Pulling it up further, the sleeve part (5-1) attached to the thin solid material terminal of the second stage antenna shaft (cell phone body side) (5) starts to be inserted into the antenna holder (4) and the sleeve Stop at the stopper (5-2) of the terminal (5-1). Thus, the second-stage antenna shaft (on the mobile phone main body side) (5) and the mobile phone main body (6) are fixed. When it is further raised, the hollow material (pipe) of the first-stage antenna shaft (antenna top side) (3) extends and is attached to the other end of the second-stage antenna shaft (mobile phone main body) (5). The sleeve portion (5-3) starts to be inserted into the sleeve portion (3-1) of the hollow material (pipe) of the first stage antenna shaft (antenna top side) (3), and the sleeve portion (3-3) is started.
-1) Stop at the terminal stopper (3-2), the first stage antenna shaft (antenna top side) (3) and the second stage antenna shaft (mobile phone body side) (5) are fixed, and
Withdrawal of the step antenna is completed.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Generally, the antenna holder (4) is incorporated in the antenna as one component of the two-stage antenna (1) for a mobile phone, and the two antenna shafts (3) and (5) are formed by using an internal thin plate spring or the like.
Is supported. Furthermore, connection and fixation with the mobile phone body (6) are performed. Here, the outer diameter of the first stage antenna shaft (antenna top side) (3) and the sleeve portion (5-1) of the second stage antenna shaft (cell phone body side) (5) on the cell phone body side
Antenna holder (4) by equalizing the outer diameter of
Is shared. Further, the hollow material (pipe) of the first stage antenna shaft (antenna top side) (3) has strong lateral rigidity and is hard to bend. Therefore, when used as the second-stage antenna shaft (on the side of the mobile phone) (5), the lateral load (bending force) may adversely affect the mobile phone body (6) via the antenna holder (4). In the present invention, 1
To be used as the stage antenna shaft (antenna top side) (3), the second stage antenna shaft (mobile phone body side)
By disposing a material such as a Ni-Ti alloy having good flexibility as (5), all of the lateral load can be absorbed by the solid material of the second-stage antenna shaft (on the side of the mobile phone) (5). Therefore, the lateral load does not adversely affect the mobile phone body (6). The hollow material (pipe) of the first-stage antenna shaft (antenna top side) (3) is made of a material having a small specific gravity, such as titanium, and a two-stage antenna for a mobile phone by using a thin pipe. (1) Lightening can be achieved.

According to the present invention, the cost of parts can be reduced. Assembly work is also efficient. The defect rate and the repair rate can also be reduced. The weight of the two-stage antenna (1) for a mobile phone can be reduced by selecting the material of the first-stage antenna shaft (antenna top side) (3) and reducing the thickness of the hollow material (pipe). Can be lighter. As a result, it is possible to produce a two-stage antenna (1) for a mobile phone that is low in cost and lighter.

[Brief description of the drawings]

FIG. 1 is a view showing the entirety of a two-stage antenna (1) for a mobile phone according to the present invention.

FIG. 2 shows a two-stage antenna (1) for a mobile phone according to the present invention.
It is a figure which shows the Example which the stage antenna shaft (mobile phone main body side) (5) was accommodated in the 1st stage antenna shaft (antenna top side) (3), and was attached to the mobile phone main body (6).

FIG. 3 is a diagram showing a first-stage antenna axis (antenna top side) (3) and an antenna top (2) of the present invention.

FIG. 4 is a second-stage antenna shaft of the present invention (on the side of a mobile phone).
It is a figure showing (5).

[Explanation of symbols]

1. 1. Two-stage antenna for mobile phones 3. Antenna top 3. First-stage antenna shaft (antenna top side) 3-1.1-stage antenna shaft sleeve 3-2.1-stage antenna shaft stopper Antenna holder 5. Second stage antenna shaft (mobile phone main body side) 5-1.2th stage antenna shaft mobile phone main body side sleeve portion 5.2.2 Second stage antenna shaft mobile phone main body side stopper portion 5-3.2 5. First-stage antenna shaft-side sleeve portion of the first-stage antenna shaft 5-4. First-stage antenna shaft-side stopper portion of second-stage antenna shaft Axis mobile phone body

Claims (3)

[Claims] 1. A structure in which a hollow material (pipe) is used instead of a conventional coil spring as a part of a two-stage antenna for a mobile communication device such as a mobile phone (hereinafter referred to as a mobile phone). 2. A conventional two-stage antenna for a cellular phone has a small diameter of a first-stage antenna axis (antenna top side), and a second-stage antenna axis (cellular phone body side) has a first-stage antenna axis (antenna top). It is common to use a coil spring having an inner diameter larger than the diameter of (side). In the present invention, unlike the structure of the conventional two-stage antenna for mobile phones, a hollow material (pipe) is used for the first-stage antenna shaft (antenna top side) and the second-stage antenna shaft (mobile phone main body side) is used. Using a thin material that can be inserted into the first-stage antenna shaft (antenna top side), it has a function equivalent to that of a conventional product, and has a structure that can further reduce parts cost, assembly cost, defective rate, and the like. 3. Significant weight reduction is achieved by using a hollow material (a pipe made of a material having a small specific gravity such as titanium) and a thin pipe.