JPH1117425A - Antenna system for mobile communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna system for a mobile communication equipment provided with constitution capable of smoothly performing the pull-out and storage operations of an antenna element by reducing the weight of the entire antenna system and suppressing the deformation of the antenna element. SOLUTION: An antenna part 13 for maintaining an electrically conductive state with a power feeding terminal 14 arranged at one end of the extension direction of the antenna element 11 for constituting a power feeding line from a mobile communication equipment main body at the time of storing this antenna device 10 and the power feeding terminal 15 arranged on the other end of the extension direction for constituting the power feeding line from the mobile communication equipment main body at the time of pulling out the antenna system 10 are integrally connected by a resin mold 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device for a mobile communication device such as a portable telephone and a portable radio.

[0002]

2. Description of the Related Art As is well known, a mobile communication device such as a mobile phone or a portable wireless device is equipped with a transmitting / receiving antenna. The transmission / reception antenna can be stored and pulled out of the communication device main body, and is used by being pulled out from the mobile communication device main body during a call. Such an antenna needs to be electrically connected to a signal transmission circuit arranged in the mobile communication device main body. For this reason, the antenna is provided with a power supply terminal that maintains an electrical continuity between the signal transmission circuit positioned at the distal end in a state where the antenna is pulled out from the main body of the mobile communication device and a state where the antenna is stored. ing. FIG. 4 is a diagram showing an example of the above-described antenna device. In FIG. 4, the antenna device includes a rod-shaped antenna element 1, a sleeve 2, a coil 3, and a stopper 4 as main parts.

[0003] The outer periphery of the antenna element 1 except for a part in the extension direction is covered with a resin tube, and the antenna element 1 can be pulled out and stored by a holder 5 which is fastened to a mobile communication device main body (not shown). It is slidably supported for selection. The sleeve 2 is a conductive member connected to the antenna element 1 via an insulator 6 made of an electrically insulating member integrated at one end in the extension direction of the antenna element 1, and is opposite to the connection end with the insulator 6. An annular portion for fixing one end of the coil 3 in the mounting direction and a screw portion for attaching the top cover 7 to the outer periphery of the annular portion are formed at the end of the coil 3. The stopper 4 is a conductive member having an end plug portion 8 to which a terminal portion of the antenna element 1 is caulked, and formed of an integrally molded product inserted from the other end of the antenna element 1 in the extension direction. In addition, in FIG.
The bobbin 9 is designed to be used as a core when the top cover 7 is attached, and has the coil 3 embedded therein. The antenna device shown in FIG. 4 is configured such that when the antenna element 1 is pulled out from a mobile communication device main body (not shown), the antenna element 1 constitutes a transmitting / receiving antenna unit, and when the antenna element 1 is stored, the coil 2 serves as a transmitting / receiving antenna. Part. Therefore, the sleeve 2 and the end plug 8
The feeder from the signal transmission circuit provided in the mobile communication device main body comes into contact with the stopper 4 including the above, so that a feed path to the antenna element 1 and the coil 3 can be formed. The antenna device shown in FIG. 4 is configured such that the sleeve 2 and the stopper 4 come into contact with a terminal portion (not shown) provided on the holder 5.

[0004]

By the way, in the antenna device having the above-mentioned structure, the sleeve 2 is used to secure rigidity for fastening and supporting the top cover 7 and to form a power supply path. In addition, rod-shaped metal processing parts are used to secure rigidity for keeping the antenna element 11 from coming off and holding and to form a feed path. However, there is a risk that the weight will increase when such metal-worked parts are used. In particular, the sleeve 2 located at the tip of the antenna element 1
Is a metal part, the buckling load acting on the antenna element 1 is increased by increasing the weight at the tip of the antenna. For this reason, buckling deformation or bending deformation is likely to occur in the antenna element 1. As a result, the deformation of the antenna element 1 increases the sliding resistance when the antenna element 1 is pulled out from or stored in the mobile communication device main body, and there is a problem that a smooth operation cannot be performed.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional antenna device, it is an object of the present invention to not only reduce the weight of the entire antenna device and improve portability, but also suppress deformation of the antenna element, thereby pulling out the antenna element. Another object of the present invention is to provide an antenna device for a mobile communication device having a configuration in which a storage operation can be performed smoothly.

[0006]

In order to achieve the above object, an invention according to claim 1 is an antenna device attached to a mobile communication device, wherein the antenna device is pulled out from a main body of the mobile communication device and the antenna device is attached to the mobile communication device. An antenna element for selecting one of the stored states in the main body is provided.When the antenna element is pulled out, the antenna element is used as a transmitting / receiving antenna unit. In an antenna device in which the arranged wire is used as an antenna portion and the antenna element and the terminal for feeding power to the wire are electrically connected to the antenna element and the wire, the extension direction of the antenna element, etc. Exposing a part of the end and forming each of the above power supply terminals into a pipe structure The power supply terminals are connected to each other by filling the inside of the power supply terminals with a resin mold surrounding the outer periphery of the antenna element to expose the surface, and the power supply terminals to the wire surround the wires. A cover is integrated by molding, and a terminal of the antenna element is integrated with a power supply terminal to the antenna element.

According to a second aspect of the present invention, in the antenna device for a mobile communication device according to the first aspect, the resin mold has an end portion which can enter a power supply terminal to the antenna element in an extending direction of the antenna element. Characterized by being molded integrally with a resin tube having

[0008] The invention described in claim 3 is claim 1 or 2.
The antenna device for a mobile communication device described above, wherein the antenna element is integrally formed with the wire.

[0009]

According to the first and second aspects of the present invention, the connecting part to the antenna element is constituted by a combination with a molded part or a resin tube except for the power supply terminal part for the antenna element and the coil. Weight can be reduced compared to processed parts.
In addition to simply using molded parts or a combination of molded parts and a resin tube, many parts have been used in many parts except for the power supply terminal part where the buckling load of the antenna tends to be large. The deformation of the antenna can be suppressed by reducing the portion occupied by the metal processing component and reducing the weight at the tip of the antenna.

According to the third aspect of the present invention, even when the antenna element and the wire are integrally formed,
Except for the power supply terminal, a large number of molded products can be used, so that the weight of the power supply terminal which has been occupied by the metal processing component can be reduced.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; FIGS. 1A and 1B are diagrams showing an embodiment of the invention according to claim 1, wherein FIG. 1A shows the overall configuration of the antenna device, FIG. 1B shows a state in the course of the manufacturing process of the antenna device, and FIG. The main components of the antenna device are shown. In FIG. 1, an antenna device 10 includes an antenna element 11, which is located at one end in the extension direction of the antenna element 11, that is, located at the other end in the extension direction from the distal end side of the antenna device 10, that is, in a mobile communication device main body (not shown). Top cover 12 toward the base end,
It includes a coil 13, a coil power supply terminal 14, an antenna element power supply terminal 15, and an end plug 16. As shown in FIG. 1C, the coil 13 is a part constituting an antenna unit when the antenna device 10 is stored, similarly to the conventional configuration, and one end of the coil 13 in the winding direction is a coil feed terminal 14. Is fixed to the outer periphery of one end of the sleeve by soldering or the like. The coil power supply terminal 14 has an annular protrusion 1
4A is provided. The annular protrusion 14A is formed so as to bulge outward, and is provided as a portion for preventing the coil power supply terminal 14 from coming off with respect to a bobbin formed by a resin mold described later. In FIG. 1C, the antenna element power supply terminal 1 is located at the other end of the antenna element 11 in the extension direction.
Reference numeral 5 denotes a metal pipe having an inner diameter through which the antenna element 11 can be inserted.
An end plug 16 to which the other end in the extension direction of the antenna element 11 is coupled is caulked and integrated. FIG.
The constituent members shown in (C) are each formed of a conductive member, and form part of the feed path to the antenna element 11 and the feed path to the coil 13 when the antenna device 10 is pulled out and stored. I have.

On the other hand, each component shown in FIG.
They are connected by a resin mold. FIG. 1 (B)
FIG. 1C shows a state in which the constituent members shown in FIG. 1C are integrated by a resin mold. In the same figure, a resin mold 17 is made of a polyamide resin or the like, and has a coil having an outer diameter capable of embedding the coil 13. The buried portion 17A and the power supply terminal filling portion 17 filled in the coil power supply terminal 14
B and an antenna element insertion portion 17C in which the antenna element 11 can be embedded are integrally formed. The coil burying portion 17A forms a bobbin portion in which the coil 13 can be buried.
4 is formed to include the annular projection 14A, thereby preventing the coil power supply terminal 14 from falling off. Further, both ends of the antenna element insertion portion 17C,
That is, near the end of the coil power supply terminal 14 and near the exposed end of the antenna element 11, the tapered portions 17C1 and 17C2 whose diameters increase toward both sides in the extension direction of the antenna element 11 are formed. The tapered portions 17C1 and 17C2 are formed to position the antenna device 10 in the drawn-out position and the stored position, respectively. In FIG. 1B, a resin mold 17 is provided.
At the time of molding, a core member (not shown) for supporting the antenna element is loaded inside the coil power supply terminal 14 integrated with the coil 13 in the molding die. Further, a part of the other end in the extension direction of the antenna element 11 and the surface of the coil power supply terminal 14 are kept in a state where the resin is not covered by a method such as masking. Injecting the resin into the molding die in this state forms the coil embedding portion 17A, the feeding terminal filling portion 17B, and the antenna element insertion portion 17C having the tapered portions 17C1 and 17C2, respectively.

When the resin mold 17 is formed, the top cover 12 is formed again on the coil embedded portion 17A, whereby the bobbin outer peripheral surface of the coil embedded portion 17A and the top cover 12 are integrally formed. In this embodiment, an ABS resin is used as a material of the top cover 17.

On the other hand, the antenna device 10 in which the constituent members are connected by the resin mold 17 is a mounting member for slidably supporting the antenna element 11 from the end of the antenna element insertion portion 17C on the tapered portion 17C2 side. A certain holder 18 is inserted. The holder 18 has an inner diameter that allows the taper portion 17C2 to pass through, and presses the antenna element 11 by an electrode portion made of an elastic body that projects inside from a window (not shown) so that the antenna element 11 can slide and does not slide unnecessarily. I have come to support it. A pipe-shaped antenna element power supply terminal 15 having an inner diameter through which the antenna element 11 can be inserted is inserted into the exposed end of the antenna element 11, and an end plug 16 is integrated at the end of the end. Is done. The exposed end of the antenna element 11 is connected to the end plug 1 that is inserted into the antenna element feed terminal 15.
6 is crimped to the outer periphery of the antenna element power supply terminal 15 to be integrated, and an electrical conduction state with the antenna element power supply terminal 15 is set.

Since the present embodiment is configured as described above,
When the main components of the antenna device 10 shown in FIG. 1C are created, the components are connected by a resin mold 17. When the components are connected by the resin mold 17, the holder 18, the antenna element power supply terminal 15, and the end plug 16 used for mounting on the mobile communication device main body are attached, and the antenna device 10 is completed. Such an antenna device 10 is slidably supported so that the antenna element 11 can be selected between a retracted position and a retracted position by fastening the holder 18 to the main body of the mobile communication device. The power supply path for the coil 13 and the antenna element 11 is formed by contacting the electrode portion in each position.

According to the present embodiment, at least the coil power supply terminal 14 disposed at the distal end of the antenna device 10
Is formed in a sleeve shape, the portion occupied by the metal processing component can be reduced as compared with the conventional rod shape, and the weight of the portion can be greatly reduced. In addition, since the top cover 12 is integrated with the coil power supply terminal 14 by resin molding, the conventionally required fastening processing is not required, and the number of working steps can be reduced. In addition, the coil 13 and the antenna element 11 are used as the antenna section in the retracted position and the retracted position, and the antenna section is provided in two places in the antenna device while being electrically separated from each other. Even if there is, the antenna element insertion portion 1 of the resin mold 17
7C is integrated with the coil 13 serving as one of the antenna units via a coil feed terminal 14, and integrated with the antenna element 11 serving as the other antenna unit via the feed terminal 15 for the antenna element. Since each can be connected and supported, it is possible to suppress an increase in the weight of the structure that connects the antenna units, regardless of the number of locations where the antenna units are installed. In the above-described resin mold 17, an example has been described in which the antenna element 11 is formed after the antenna element 11 is supported by the coil power supply terminal 14 in advance, but the present invention is not limited to such an example. For example, the antenna element insertion portion 17C may be formed only with a hole through which the antenna element 11 can be inserted, and the antenna element 11 may be inserted into the hole as a post-processing. In this case, the support structure of the antenna element 11 in the coil power supply terminal 14 as described above can be simplified.

Next, an embodiment of the present invention will be described. FIG. 2 is a view corresponding to FIG. 1 showing an embodiment of the second aspect of the present invention. The embodiment shown in FIG. 2 is characterized in that a part of a resin mold is a resin tube. 2, the same components as those shown in FIG. 1 are denoted by the same reference numerals. In FIGS. 2A and 2B, a resin mold (designated by reference numeral 17 'for convenience) has a resin tube 170 at a portion corresponding to the antenna element insertion portion 17C shown in FIG. Resin tube 1
Reference numeral 70 denotes the outer periphery of the antenna element 11 except for a part of one end in the extension direction, which extends to the vicinity of the end where the antenna element power supply terminal 15 is integrated. One end of the resin tube 170 located at one end in the extension direction of the antenna element 11 is integrally formed with a part of the power supply terminal filling portion 17B.

In this embodiment, since the area excluding the vicinity of both ends in the extending direction of the antenna element 11 is covered with the resin tube 170, the tapered portions shown in FIG. 1 (portions indicated by reference numerals 17C1 and 17C2 in FIG. 1). In the structure corresponding to (), one is formed in the power supply terminal filling portion 17B and the other is formed in a part of the power supply terminal 15 for the antenna element, so that the same function as the example shown in FIG. 1 is obtained. I have.

Since the present embodiment has the above configuration,
As in the example shown in FIG. 1C, when the main components of the antenna device 10 are created, those components are connected by the resin mold 17 '. In this case, the connected members are the coil 13, the coil power supply terminal 14, and the antenna element 11, and the coil buried portion 17A and the power supply terminal filling portion 17B of the resin mold 17 'are formed.
On the other hand, when a part of the power supply terminal filling portion 17B of the resin mold 17 'and one end of the antenna element 11 in the extension direction are connected, the antenna element 11 is covered with the resin tube 170. The top cover 12 is integrated with the outer peripheral surface of the bobbin portion of the coil embedded portion 17A by secondary molding up to this point or at any time after the coating of the resin tube 170. Antenna element 11
At the other end in the extension direction, a power supply terminal 15 for an antenna element, which is integrated with an end plug portion (for convenience, denoted by reference numeral 21) in which the terminal of the antenna element 11 is integrated, is further fitted with a holder 18. , Its holder 18
Is fastened to the mobile communication device main body to complete the antenna device.

According to this embodiment, the antenna element 1
Since the outer periphery of 1 is covered with a resin tube instead of a resin mold, it is possible to further reduce the weight as compared with the case of the resin mold by appropriately selecting the thickness of the tube.

Next, an embodiment of the present invention will be described. FIG. 3 is a sectional view of an essential part showing an embodiment of the third aspect of the invention. The embodiment shown in FIG. 3 is characterized in that an antenna element and a coil are integrated. That is, one end of the antenna element (indicated by reference numeral 11 ′ for the sake of convenience) in the extension direction has the coil feeding terminal 1.
4. Core member 20 made of a conductive member fixed in 4
The other end in the extension direction is integrally connected to an end mounting member 21 made of a conductive member. The outer periphery of the antenna element 11 'is provided with a resin mold (for convenience, indicated by reference numeral 171). Resin mold 171
Are coil buried portions 171A, as in the example shown in FIG.
It has a feeding terminal filling portion 171B and an antenna element insertion portion 171C, and the other end in the extension direction of the antenna element 11 ', that is, a portion where the antenna element feeding terminal 15 is integrated is removed. In the case of this embodiment, the coil power supply terminal (for convenience, denoted by reference numeral 14 ′) and the antenna element power supply terminal (for convenience, denoted by reference numeral 15 ′) are caulked on the outer periphery of the antenna element insertion portion 171 C in the resin mold 171. It is integrated by the thing.

Since the present embodiment has the above configuration,
As in the case of the embodiment shown in FIGS. 1 and 2, the coil power supply terminal 14 ′ located on the distal end side of the antenna element 11 ′ is formed in a pipe shape by interposing the power supply terminal filling portion 171 B in the resin mold 171. Since the structure can be used, the weight can be reduced as compared with the conventional rod-like structure. In addition, since the top cover can be integrated without fastening to the coil power supply terminal 14 ',
Assembly work can be simplified. In the above embodiment, the description has been made on the assumption that a coil is used as the configuration of the antenna unit.However, the present invention is not limited to such a coil, and a rod-shaped wire that forms a vertical pole may be used. It is possible.

[0023]

As described above, according to the first and second aspects of the present invention, the connection component to the antenna element except for the power supply terminal portion for the antenna element and the coil is a combination of a molded component or a resin tube. Since it is configured, the weight can be reduced as compared with a conventional metal processing part. In addition to simply using molded parts or a combination of molded parts and a resin tube, many parts have been used in many parts except for the power supply terminal part where the buckling load of the antenna tends to be large. The deformation of the antenna can be suppressed by reducing the portion occupied by the metal processing component and reducing the weight at the tip of the antenna. As a result, it becomes possible to suppress the buckling deformation and the bending deformation of the antenna element and to smoothly perform the pull-out or storage operation.

According to the third aspect of the present invention, even in the case where the antenna element and the wire are formed in an integrated structure, many molded products can be used except for the power supply terminals. The weight of the power supply terminal occupied by the components can be reduced. In particular, since the power supply terminal to the wire located on the tip side of the antenna device can use a structure in which the resin mold is filled inside,
Accordingly, the buckling load can be reduced by reducing the weight.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views for explaining an embodiment of an antenna device according to the first aspect of the present invention, wherein FIG. 1A is an overall configuration, FIG. 1B is a resin mold configuration, and FIG. The main components of the device are respectively shown.

FIGS. 2A and 2B are cross-sectional views for explaining an embodiment of the antenna device according to the second aspect of the present invention, wherein FIG. 2A shows the entire configuration, and FIG. 2B shows the configurations of a resin mold and a resin tube; I have.

FIG. 3 is a cross-sectional view for explaining an embodiment of the antenna device according to the third aspect of the present invention.

4A and 4B are cross-sectional views for explaining a conventional example of an antenna device, wherein FIG. 4A shows an entire configuration, and FIG. 4B shows main components of the antenna device.

[Explanation of symbols]

Reference Signs List 10 antenna device 11, 11 'antenna element 12 top cover 13 coil 14 coil feeding terminal 15 antenna element feeding terminal 16 end plug 17, 17', 171 resin mold 170 resin tube

Claims (3)

[Claims] 1. An antenna device attached to a mobile communication device, comprising an antenna element that selects one of a state of being pulled out from a main body of the mobile communication device and a state of being stored in the main body. When the antenna element is pulled out, the antenna element is used as a transmission / reception antenna unit, and when stored, the wire disposed at one end in the extension direction of the antenna element is used as the antenna unit, and the antenna element and the wire are used. Wherein the power supply terminal portion is electrically connected to the antenna element and the wire, and a part of the other end in the extension direction of the antenna element is exposed, and the power supply terminals are formed in a pipe structure. To expose the surface and surround the outer periphery of the antenna element The power supply terminals are connected to each other by filling the inside of the power supply terminals with a resin mold, and a cover surrounding the wire is integrated with the power supply terminal to the wire by molding to supply power to the antenna element. An antenna device for a mobile communication device, wherein a terminal for an antenna element is integrated with a terminal for the mobile communication device. 2. The antenna device for a mobile communication device according to claim 1, wherein the resin mold is integrated with a resin tube having an end that can enter a power supply terminal to the antenna element in an extending direction of the antenna element. An antenna device for a mobile communication device, which is formed. 3. The antenna device for a mobile communication device according to claim 1, wherein the antenna element is formed integrally with the wire.