JP2003051703A - Contact spring of antenna for mobile phone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact spring which is provided with a collar of the same shape and size as those of a washer conventionally used placed at an upper end of the contact spring in place of the washer so as to surely prevent a tube from being caught by the contact spring and of which the cost is reduced. SOLUTION: The contact spring of this invention is characterized in that a longitudinal cut 2 with a prescribed width is provided on the contact spring of a cylinder shape whose hoop is externally swollen and the color 4 for preventing the tube from being caught by the contact spring is placed to the upper end of the contact spring by means of a press or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a contact spring for holding an antenna wire (wire) which is slidably moved up and down by a part of parts constituting an antenna for a multi-stage mobile telephone with an appropriate pressing force. It is about.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, a contact spring of an antenna for a mobile phone has an antenna wire having a stopper provided at a lower end thereof, and a tube provided above the antenna wire. The washer is inserted between the tube and the contact spring to prevent the tube from biting into the upper end of the contact spring.

[0003]

However, since the washer inserted between the tube and the contact spring is a small component and requires precision, the manufacturing cost is high.
As a means of reducing costs, the mobile phone industry is in a situation where ingenuity and improvement of such washers, which are such minute parts, cannot be avoided. It is an object of the present invention to remove the washer and to provide a contact spring that surely prevents biting and reduces cost by providing a collar of the same size as the washer at the upper end of the contact spring instead of the washer. To do.

[0004]

In order to achieve the above object, the present invention provides a cylindrical contact spring 1 having an abdominal portion bulging outwardly and vertically provided with a notch 2 having a predetermined width, which is parallel to the notch. A plurality of slit windows 3 are provided, and a collar portion 4 for preventing the biting of the tube is provided at the upper end by means such as a press. The collar portion 4 is divided into a plurality of radial portions as shown in FIG. It is also possible to provide the flange portion 4 inside, and it is also possible to provide the collar portion 4 inside as shown in FIG.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the present invention, FIG. 2 is a perspective view showing an example of a contact spring of a conventional mobile phone antenna, FIG. 3 is a second embodiment of the present invention, and FIG. The third
FIG.

Reference numeral 1 in the figure is a contact spring made of a cylindrical steel thin plate whose middle abdomen bulges outward gently, and has a vertical cut 2 and a plurality of cut windows 3 parallel to the cut 2. The flange 4 is provided at the upper end.

Since the notch 2 and the slit window 3 are provided, elasticity is generated in the entire cylindrical contact spring, the elasticity of the contact spring 1 becomes more flexible, and the vertical movement of the antenna wire 6 becomes smoother. The contact spring 1 can be easily inserted into the holder 8 and the antenna wire is held by an appropriate pressing force of the contact spring.

Numeral 4 is a flange portion which is formed in a disk shape on the upper end of the contact spring 1 by means of press working or the like, leaving the wire insertion port 5 in a disk shape, and when the antenna wire is lowered, it is above the antenna wire. It is adapted to receive the lower end of the covered tube 7. The collar portion 4 provided horizontally on the upper end portion of the contact spring 1 receives the lower end portion of the descending tube when the antenna wire is housed (lowered) in the mobile phone. Conventionally, the washer is a single component. It is supposed to be received by 4a. The collar portion 4 is replaced with a washer for preventing the tube 7 which is a drawback of the conventional contact spring shown in FIG. 2 from biting into the contact spring, thereby reducing the number of parts and further omitting the manufacturing process. It is intended to reduce costs.

As a second embodiment of the present invention, as shown in FIG. 3, it is possible to form the collar portion 4 by dividing it into a plurality of pieces.
Molding is thus easy when divided into a plurality of pieces, and even-numbered division molding further facilitates molding and reduces cost.

As shown in FIG. 4 as a third embodiment, it is possible to form the collar portion 4 on the inside, and the contact spring is excellent in design. It is not technically difficult to form the collar portion 4 on the inside, and since it can be easily formed by drawing or the like, it also contributes to cost reduction and increases the stability of electrical contact with the antenna wire. Further, it is possible to form the collar portion formed inward as in the above-described embodiment, which is not technically difficult and there is no functional change.

The antenna wire insertion hole 5 is a hole through which the antenna wire 6 is inserted into the contact spring 1. By providing the notch 2 in the contact spring 1, the antenna wire 6 is appropriately held, and the antenna can be taken in and out very smoothly. .

The antenna wire 6 (wire) is provided with a stopper 8 at its lower end portion for preventing the antenna wire 6 from coming off, and an upper portion thereof is covered with a tube 7 at a predetermined interval.

The contact spring of the present invention constructed as described above is inserted into an antenna holder (not shown) of a mobile phone.

Since the present invention is configured as described above, it has the following effects. a. The reduction in the number of parts (washers) reduces the cost of the antenna, which leads to the cost reduction of the mobile phone. b. The reduction in the number of parts increases the stability of electrical contact between the contact spring and the antenna wire, and in particular, the contact spring provided with the collar portion inside is improved. c. By providing the flange (instead of the conventional bite prevention washer) integrally with the contact spring at the upper end of the contact spring, the upper end does not become entangled as in the conventional case, and the tube does not bite.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2 is a perspective view around a contact spring of a conventional mobile phone antenna.

FIG. 3 is a diagram of a second embodiment of the present invention.

FIG. 4 is a diagram of a third embodiment of the present invention.

[Explanation of symbols]

1 contact spring 2 notches 3 cut windows 4 collar part 4a Washer 5 Wire insertion hole 6 antenna wire 7 tubes 8 stopper

Claims (3)

[Claims] 1. A tube-shaped contact spring having an abdominal portion bulging outwardly is vertically provided with a notch having a predetermined width, a plurality of slit windows are provided in parallel to the notches, and a tube is formed at the upper end by means of a press or the like. A contact spring for an antenna for a mobile phone, characterized in that a brim portion for preventing the bite of the mobile phone from extending outward is provided. 2. The contact spring for an antenna for a mobile phone according to claim 1, wherein the collar portion is provided by dividing the collar portion into a plurality of pieces. 3. The contact spring for an antenna for a mobile phone according to claim 1, wherein the collar portion 3 is provided so as to spread inside the contact spring.