JP2012257008A - Antenna structure of waterproof type portable radio and waterproof type portable radio including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna structure of a waterproof type portable radio and the waterproof type portable radio which ensure to avoid the influences on other antennas when an antenna is housed.SOLUTION: An antenna structure of a waterproof type portable radio 1 includes: a housing 16 housing a radio circuit part 22 so as to make the interior watertight; and a whip antenna 43 extending and retracting inside and outside the housing 16. The antenna structure of the waterproof type portable radio 1 includes a cutout part waterproof gasket covering around the whip antenna 43; an impedance circuit part 21 housed at the housing 16 in a watertight manner; a first connection part 13 connecting the other end part 43b of the whip antenna 43 with the impedance circuit part 21 when the whip antenna 43 is retracted; and a second connection part 15 connecting the other end part 43b of the whip antenna 43 with the radio circuit part 22 when the whip antenna 43 is extended. Further, the first connection part 13 is provided at an outer periphery of the cutout part waterproof gasket and electrically connects with the whip antenna 43.

Description

  The present invention relates to an antenna structure for a portable wireless device having a waterproof function.

  2. Description of the Related Art In recent years, portable wireless devices such as mobile phones have become smaller and thinner and have various application functions, which are indispensable for daily life. For this reason, portable wireless devices having a waterproof function have been developed to meet the demands of consumers for use in various real life situations such as outdoor use in rainy weather.

  The portable wireless device is provided with a plurality of antennas corresponding to various applications. Here, for example, an antenna for telephone communication is often built in a portable wireless device, but it is difficult to incorporate a digital TV antenna or the like due to a problem of reception. A whip antenna provided to be extendable and retracted is used. And when this whip antenna is accommodated (when not in use), it is adjusted so as not to operate in the communication band of other antennas such as the above-mentioned telephone communication antenna, and is set so as not to affect the use of these other antennas. A portable radio device having an impedance circuit is also known.

JP 2000-004113 A

However, in the portable wireless device including the telescopic whip antenna and the impedance circuit, the whip antenna is provided to be slidable with respect to the portable wireless device. However, due to the structure, the contact portion between the impedance circuit and the whip antenna is provided. There is a concern that poor contact may occur.
Further, since it is difficult to waterproof the sliding portion, the whip antenna is generally mounted in a non-waterproof area even when provided in a waterproof portable wireless device. Therefore, the contact portion with the impedance circuit may be submerged, resulting in poor contact.
For this reason, stable contact cannot be made between the impedance circuit and the whip antenna, and the influence on other antennas such as an antenna for telephone communication cannot be sufficiently avoided when the whip antenna is not used.

  The present invention has been made in view of such circumstances, and provides a waterproof portable radio antenna structure and a waterproof portable radio that can reliably suppress the influence on other antennas when the antenna is housed. Objective.

In order to solve the above problems, the present invention employs the following means.
That is, the antenna structure of the waterproof portable wireless device according to the present invention includes a waterproof portable portable device including a housing that accommodates a wireless circuit portion in a waterproof manner and a first antenna that can extend and contract inside and outside the housing. In the antenna structure of the radio, a waterproof packing that covers the periphery of the first antenna, an impedance circuit unit that is waterproofly accommodated inside the housing, and when the first antenna contracts, the first antenna A first connection portion where the front end portion inside the housing and the impedance circuit portion face each other, and a second connection for connecting the front end portion of the first antenna and the wireless circuit portion when the first antenna is extended And the first connecting portion is provided on the outer peripheral side of the waterproof packing and is electrically connected to the first antenna portion via the waterproof packing. Antenna structure of the band radio.

  A waterproof portable wireless device according to the present invention includes the antenna structure described above.

  According to the antenna structure of the waterproof portable wireless device and the waterproof portable wireless device of the present invention, the first antenna can be operated when the first antenna is extended, and the waterproof packing is interposed when the first antenna is contracted. By using the non-contact electrical connection, it is possible to avoid contact failure and water immersion at the first connection portion, and to suppress the influence on the second antenna.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the entirety of a waterproof portable wireless device according to a first embodiment of the present invention when the first antenna is contracted. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the entirety of a waterproof portable wireless device according to a first embodiment of the present invention when the first antenna is extended. It is a block diagram which simplifies and shows the circuit structure inside the waterproof portable radio | wireless machine which concerns on 1st embodiment of this invention. It is a perspective view which shows the whole waterproof portable radio | wireless machine which concerns on 2nd embodiment of this invention, Comprising: It is a figure at the time of a 1st antenna contraction.

The waterproof portable wireless device 1 according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
The waterproof portable wireless device 1 is, for example, a mobile phone that includes a digital TV antenna unit (first antenna) 12 together with a telephone communication antenna unit (second antenna) 11.

  The waterproof portable wireless device 1 (hereinafter simply referred to as the portable wireless device 1) includes a telephone communication antenna unit 11 that transmits and receives communication radio waves, a digital TV antenna unit 12 that receives TV broadcasts, and a digital TV antenna. The circuit board 14 connected to the part 12 through the first connection part 13 and the second connection part 15 is provided. All of these components are housed in the housing 16.

  The housing 16 is a box member having a hollow inside made of plastic, metal, or the like. The housing 16 has a rectangular parallelepiped shape having an upper surface 31, a lower bottom surface 32 parallel to the upper bottom surface 31, and four side surfaces sandwiched between the upper bottom surface 31 and the lower bottom surface 32. .

  Further, the housing 16 has a cutout portion 35 that opens to the upper bottom surface 31 and a first side surface 33 that is one of the four side surfaces. The cutout portion 35 is formed on the first side surface. When viewed from the direction perpendicular to 33, the direction perpendicular to the upper bottom surface 31 and the lower bottom surface 32, that is, the first direction A is the longitudinal direction, and the second direction B perpendicular to the first direction A is short. It has a substantially rectangular shape as a direction.

Here, a direction orthogonal to the first side surface 33, that is, a direction orthogonal to the first direction A and the second direction B is defined as a third direction C.
The notch 35 is formed at a position near the one side B1 in the second direction when viewed from the third direction C.
Further, the housing 16 is arranged in the third direction C between the first housing 16 a and the second housing 16 b in the middle between the first side surface 33 and the second side surface 34 parallel to the first side surface 33. The first casing 16a and the second casing 16b are joined together with the casing waterproof packing 44 interposed therebetween. In addition, the said notch part 35 is located in the 2nd housing | casing 16b.

  Further, a notch waterproof gasket 42 is provided inside the notch 35 so as to cover the inner surface of the notch 35. The notch waterproof gasket 42 is used to stop water between the notch 35 and the second housing 16b.

  The telephone communication antenna unit 11 is an antenna device that transmits and receives radio waves for telephone communication with a base station. The telephone communication antenna unit 11 is accommodated in a rectangular parallelepiped box-shaped member, and when viewed from the third direction C, the first case one side A1 and the second side in the second casing 16b. The second direction B is arranged in the extending direction at a position close to the other side B2.

  The digital TV antenna unit 12 includes a rod-like whip antenna 43 and a flat stopper 41 provided at the tip of one end 43 a of the whip antenna 43. And it inserts in the notch part waterproof packing 42 provided in the notch part 35 of the 2nd housing | casing 16b so that the whip antenna one end part 43a may be located in the 1st direction one side A1. In a state where the whip antenna 43 is inserted into the cutout waterproof gasket 42, the end surface of the stopper 41 facing the one side A <b> 1 in the first direction is located on the same plane as the upper bottom surface 31.

  The whip antenna 43 is slidable in and out of the second casing 16b along the first direction A.

  The circuit board 14 is a substantially flat electronic board extending in the first direction A and the second direction B. The circuit board 14 includes an impedance circuit unit 21 and a radio circuit unit 22, and is provided between the housing waterproof packing 44 and the notch 35 in the second housing 16 b.

  The radio circuit unit 22 is connected to the whip antenna other end portion 43b via the second connection unit 15 when the whip antenna 43 is slid in the first direction A1 side, that is, when the whip antenna 43 is extended. . The radio circuit unit 22 includes a matching circuit 23 that performs matching with the whip antenna 43 and a radio circuit 24 that is connected to the matching circuit 23 and controls received signals.

The impedance circuit unit 21 includes a parallel resonance circuit, a series resonance circuit, and the like. The impedance circuit unit 21 is slid to the other side A2 in the first direction, that is, whip via the first connection unit 13 when the whip antenna 43 contracts. This is an electric circuit that is controlled so as to avoid the influence on the antenna for telephone communication by being coupled with high frequency when the other end portion 43b of the antenna faces.
The impedance circuit unit 21 is impedance-adjusted so that the digital TV antenna unit 12 does not operate in the band used for the telephone communication antenna unit 11 and is connected to the GND.

The first connecting portion 13 has a cylindrical coupling fitting 51a made of metal provided so as to cover the notch waterproof gasket 42 from the outer peripheral side of the cutout waterproof gasket 42, and one end connected to the coupling fitting 51a. In addition, the other end has a pin-shaped terminal fitting 52 connected to the impedance circuit unit 21.
The coupling fitting 51a is provided on the first direction one side A1 in the notch 35 so as to face the other end 43b of the whip antenna when the whip antenna 43 contracts.

  The second connection portion 15 includes a fixing metal 53 and a power supply metal 54. The fixing metal 53 is a cylindrical member made of metal that is inserted into and fixed to the inside of the notch waterproof gasket 42 on the other side A2 in the first direction of the notch waterproof gasket 42. In addition, the power supply metal 54 is a pin-shaped member that is connected to the fixing metal 53 at one end, penetrates the notch waterproof gasket 42, and is connected to the radio circuit 24 through the matching circuit 23 at the other end. is there.

The fixing metal 53 is inserted with the whip antenna 43. When the whip antenna 43 is extended, the whip antenna 43 is in contact with the other end 43b of the whip antenna and is fitted so that the whip antenna 43 does not fall off in the first direction A1. Are combined.
On the other hand, when the whip antenna 43 contracts, the surface facing the first direction one side A1 of the fixing bracket 53 is the other side in the first direction of the stopper 41 so that the whip antenna 43 does not drop off in the first direction other side A2. It is in contact with the surface facing side A2.
That is, the fixing metal 53 is a member that connects the whip antenna 43 and the radio circuit unit 22 and also acts as a stopper for the whip antenna 43.

  In such a portable wireless device 1, when the whip antenna 43 is extended, the whip antenna 43 is connected to the radio circuit unit 22 via the fixing bracket 53 and the power supply bracket 54, so that TV radio waves can be received. Further, since the whip antenna 43 is fitted to the fixing bracket 53 so as not to drop off, the whip antenna 43 does not fall off to one side in the first direction.

  Here, since the whip antenna 43 is an antenna having no directivity, it is generally provided in a highly mobile device such as a mobile phone or a mobile radio.

  On the other hand, when the whip antenna 43 contracts, the impedance circuit unit 21 and the whip antenna 43 are opposed to each other by the coupling metal 51 a and the terminal metal 52. That is, the impedance circuit unit 21 and the whip antenna 43 form a capacitance and are coupled at high frequency. As a result, when the whip antenna 43 contracts, the whip antenna 43 is connected to GND through the impedance circuit unit 21. It is controlled not to operate.

  At this time, the coupling fitting 51a is arranged so as to surround the outer peripheral side of the notch waterproof gasket 42 from the direction orthogonal to the extending direction of the whip antenna 43, that is, from the second direction B and the third direction C. The whip antenna 43 and the impedance circuit unit 21 are electrically connected by non-contact high frequency coupling. For this reason, when the whip antenna 43 is extended, the connection between the other end 43b of the whip antenna and the coupling fitting 51a is not cut off even if a liquid such as water enters the inside of the notch waterproof gasket 42. Absent.

  In addition, in the connection portion between the coupling fitting 51a and the terminal fitting 52, the notch waterproof packing 42 prevents intrusion of liquid such as water, so that contact failure does not occur.

  In the portable wireless device 1 according to the present embodiment, when the whip antenna 43 is extended, the radio circuit unit 22 and the whip antenna other end 43b are connected, so that TV radio waves can be reliably received. Furthermore, the notch waterproof gasket 42 and the cylindrical coupling fitting 51a covering this from the outer peripheral side ensure that when the whip antenna 43 contracts, the impedance circuit part 21 and the whip antenna other end 43b are not affected by flooding or the like. High frequency coupled to. As a result, when the telephone communication antenna unit 11 is used, the influence from the digital TV antenna unit 12 can be suppressed, and the influence on the telephone communication can be avoided.

  Furthermore, the notch waterproof gasket 42 prevents water from entering the connecting portion between the coupling fitting 51a and the terminal fitting 52, and also prevents water from entering the second housing 16b from the notch 35. Can also be protected from flooding.

  Next, the waterproof portable wireless device 1 according to the second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the component similar to 1st embodiment, and detailed description is abbreviate | omitted. The second embodiment is different from the first embodiment in that when the waterproof portable wireless device 1 is viewed from the first direction A, the shape of the fitting 51b is a U-shape. .

  By adopting such a U-shaped coupling metal fitting 51b, sufficient high-frequency coupling can be maintained between the other end portion 43b of the whip antenna and the impedance circuit section 21, and compared with the cylindrical coupling metal fitting 51a. Manufacturing is easy, leading to cost reduction.

  Therefore, while achieving cost reduction, when the whip antenna 43 is extended, the radio wave of the TV can be reliably received by the connection between the radio circuit unit 22 and the other end portion 43b of the whip antenna. Further, when the whip antenna 43 is contracted, the impedance circuit unit 21 and the whip antenna other end 43b are reliably high-frequency coupled without being affected by water or the like. Therefore, when the telephone communication antenna unit 11 is used, the influence from the digital TV antenna unit 12 can be suppressed and the influence on the telephone communication can be avoided.

Although the embodiments of the present invention have been described in detail above, some design changes can be made without departing from the technical idea of the present invention.
For example, the shape of the coupling fittings 51a and 51b is not limited to the cylindrical shape of the first embodiment and the U-shape of the second embodiment, and is sufficiently electrically connected to the other end portion 43b of the whip antenna. Any shape can be used.

  Although the case 16 has a box shape, the present invention is not limited to this, and the antenna structure of the present invention can also be applied to a case of a mobile phone having a slide structure, a folding mechanism, or the like. .

  Furthermore, the digital TV antenna can be arranged not only at the position described in this embodiment but also at various positions of the housing 16.

DESCRIPTION OF SYMBOLS 1 ... (Waterproof type) portable radio | wireless machine, 11 ... Antenna part for telephone communications, 12 ... Digital TV antenna part, 13 ... 1st connection part, 14 ... Circuit board, 15 ... 2nd connection part, 16 ... Housing | casing, 16a ... 1st housing | casing, 16b ... 2nd housing | casing, 21 ... Impedance circuit part, 22 ... Wireless circuit part, 23 ... Matching circuit, 24 ... Wireless circuit, 31 ... Upper bottom surface, 32 ... Lower bottom surface, 33 ... First side surface 34 ... second side, 35 ... notch, 41 ... stopper, 42 ... notch waterproof gasket, 43 ... whip antenna, 43a ... one end of whip antenna, 43b ... other end of whip antenna, 44 ... waterproof case Packing, 51a ... coupling bracket, 51b ... coupling bracket, 52 ... end fitting, 53 ... fixing bracket, 54 ... feeding bracket, A ... first direction, B ... second direction, C ... third direction, A1 ... 1st direction one side, A2 ... 1st direction Square side, B1 ... a second direction on one side, B2 ... the second one side in the direction of the

Claims (5)

A housing that accommodates the wireless circuit portion in a waterproof manner;
In the antenna structure of a waterproof portable wireless device provided with a first antenna that can extend and contract inside and outside the housing,
Waterproof packing covering the periphery of the first antenna;
An impedance circuit unit housed in a waterproof manner inside the housing;
When the first antenna contracts, a first connection portion where the front end portion of the first antenna on the housing inner side and the impedance circuit portion face each other,
A second connecting portion for connecting the tip portion of the first antenna and the wireless circuit portion when the first antenna is extended;
The first connection portion is provided on the outer peripheral side of the waterproof packing, and is electrically connected to the first antenna portion via the waterproof packing.   The antenna structure of the waterproof portable wireless device according to claim 1, wherein the first connection portion is a cylindrical metal member.   The antenna structure of the waterproof portable wireless device according to claim 1, wherein the first connection portion is a U-shaped metal member. The housing further comprises a second antenna;
The antenna structure of the waterproof portable radio according to any one of claims 1 to 3, wherein the impedance circuit unit is set so that the first antenna does not operate when the first antenna contracts. .   A waterproof portable wireless device comprising the antenna structure according to any one of claims 1 to 4.

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