JP2501413B2 - Antenna and radio - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an antenna suitable for a radio, particularly a portable radio, and a radio equipped with the antenna.
The purpose is to serve.

[0002]

2. Description of the Related Art In recent years, portable wireless devices, such as portable wireless telephones, have been miniaturized so that they can be easily carried, and various shapes have been devised. As for the antenna used in this type of wireless telephone, an antenna that can be stored so as to be as portable as possible has been developed. A conventional structure of such an antenna will be described with reference to FIGS. 8 to 10. First
FIG. 0 is a perspective view showing a wireless telephone, in which the solid line shows a state where the antenna (3) is housed inside the housing (1), and the two-dot chain line shows a state where the antenna (3) is pulled out from the housing (1). Is shown. FIGS. 8 and 9 show the details of the antenna (3) when it is extended and stored. The housing (1) is provided with a printed wiring board (5) on which various high frequency components are mounted as shown in FIG. Further, the printed wiring board (5) is provided with a power feeding section (7) to which a duplexer (not shown) connected to the transmitting section and the receiving section is connected. Further, the housing (1) is provided with a mounting ring (9) which is made of metal and has a female screw portion. Further, the male thread portion of the housing joint portion (11) is screwed into the ring (9). The housing joint (11) is also made of metal, and the tongue (11)
a), and the antenna (3) is attached to this tongue (11).
It is held in a). A stopper (3a) is provided on the base end side of the antenna (1), and a knob (3b) made of resin is provided on the tip end side.

When the antenna is extended, the stopper portion (3a) of the antenna is held by the tongue (11a) at a position where it comes into contact with the tip of the tongue (11a) as shown in FIG. On the other hand, when the antenna is housed, the tongue piece (11a) holds the knob (3b) as shown in FIG. However, in this state, the feeding part (7) is not connected to the antenna body part (3c),
Reception is not possible. On the other hand, as shown in FIG. 8, transmission / reception is possible only when the power feeding portion (7) is electrically connected to the antenna body portion (3c) through the metal stopper portion (3a).

In this type of portable radio telephone, an antenna is often housed so that it can be easily carried when waiting for communication. Therefore, if it is not possible to send / receive, especially to detect incoming calls when the antenna is stored, it is impossible to call the mobile wireless telephone when the antenna is stored, and the antenna is pulled out if there is a call. There is the problem of having to stay.

In order to solve this drawback, various methods of switching to the built-in antenna in the housing when the antenna is housed have been considered, but in this method, the housed state of the antenna is detected and switched to the built-in antenna electrically or mechanically. Therefore, a different switching means is required.

Further, it is necessary to provide a partition made of a conductor between the built-in antenna and other mounted components so as not to radiate a high frequency, and the housing becomes large accordingly.

Further, the location of the built-in antenna is naturally on the upper end surface side of the housing so that the operator's hand holding the radio does not block the transmitted and received radio waves, which hinders the degree of freedom of arrangement of other mounted components. There was a problem such as becoming.

[0008]

As described above, among the conventional storable antennas that do not have a built-in antenna, transmission / reception cannot be performed when the antenna is stored, and in particular, an incoming call unless the antenna is extended. It was very inconvenient to not be able to detect that there was. On the other hand, even for an antenna that can be switched to the built-in antenna, it is necessary to have a means for switching to the built-in antenna in conjunction with the antenna housing operation, and due to the large size of the housing due to the space for arranging the built-in antenna and restrictions on the location However, there is a problem that it affects the degree of freedom in arranging mounted components.

The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide an antenna suitable for being carried, which does not require a built-in antenna and enables transmission / reception even when the antenna is housed.

[0010]

According to a first aspect of the present invention, a housing is provided.
And has a hole of a certain size connected to the circuit part of the radio
The antenna installed in the radio that has
Has a cross section smaller than the predetermined size, and
Can be stored in the housing via the
And a rod-shaped antenna that can be pulled out to
It is connected to one end of the tenor part and has almost the same size as the above.
A first connecting portion having a cross section of a size;
It is provided at the other end of the
A second connecting part having a cross section of the same size and this second connecting part
And a loading antenna part connected to the connection part,
When the first connecting part is in contact with the power feeding part,
At least the rod antenna section functions as an antenna,
When the second connecting portion is in contact with the power feeding portion,
At least a part of the loading antenna unit is the casing.
The loading antenna part is an antenna protruding from the body.
To achieve the above-mentioned object. First
In the second invention, the housing, the antenna, and the hole of a predetermined size
And a power feeding unit having a
And a circuit portion connected to
It has a cross section smaller than a certain size, and
Can be stored in the case and can be pulled out of the case
A rod-shaped antenna section and one of the rod-shaped antenna section
It is connected to the end and has the same size as the specified size.
A first connecting part having a surface and the rod-shaped antenna part
It is provided at the other end and has the same size as the predetermined size.
A second connecting portion having a cross section and connected to this second connecting portion
And a loading antenna section that is
If the connection part is in contact with the power supply part, at least the above
The rod antenna portion functions as an antenna, and the second antenna
If the connection part is in contact with the power supply part, the load
At least a part of the swing antenna part protrudes from the housing
And the loading antenna part functions as an antenna.
By doing so, the above-mentioned object is achieved.

[0011]

According to the first and second aspects of the present invention, the rod-shaped antenna
When the connector is pulled out from the housing, the first connection part is the power supply part.
Since it has a cross section that is almost the same size as the hole of
The connection part fits firmly into the power supply part. Therefore
, The rod-shaped antenna that is pre-connected to the first connection part
The core part is connected to the power supply part via the first connection part.
And at least the rod-shaped antenna part functions as an antenna.
To work. If the rod-shaped antenna part is stored in the housing,
The second connecting part has a cross section of about the same size as the hole of the power feeding part.
Has a second connection part that is firmly connected to the power supply part.
Get stuck. Therefore, at this time, the second connecting portion is previously
The connected loading antenna part is connected to the second connecting part.
It is connected to the power feeding section via the
If not, a part of it will protrude from the housing,
The antenna part functions as an antenna.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to the drawings. The same members as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 1, (1) is a housing of a portable wireless device, and an antenna (20) is provided on the housing. The antenna (20) has a first antenna portion (20b) provided at the tip and a second antenna portion (2) connected to the first antenna portion (20b).
0c) and. The first antenna part (20b) is formed by providing a loading coil (22) inside the knob (21). The loading coil (22) is a helically formed piano wire. Details of this portion will be described with reference to FIG. The knob (21) is made of resin and has a box portion (21a) and a lid portion (21b). A metal fitting (30) is insert-molded in the box portion (21a), and a loading coil (22) is provided. In this state, the lid portion (21b) is welded to the box portion (21a) to form the knob (21). The box part (21
A groove (23) is provided on the outer periphery of (a) as a hand when the antenna is pulled out. On the other hand, (24) is a stopper provided at the tip of the second antenna part (20c).

(26) is an antenna core wire made of a flexible stainless wire. (28) is a cylindrical body made of polyacetal having flexibility, and the antenna core wire (26) is press-fitted therein. Further tubular body (28)
A stopper part (20a) made of a metal such as a yellow body is press-fitted from the base end side and caulked at the end part (29) to ensure good conduction between the antenna core wire (26) and the stopper part (20a). I have to.

As shown in FIG. 2, the metal stopper (24) allows the loading coil (22) to conduct to the power feeding portion (7) through the housing joint portion (11) and the ring (9) even when the antenna is housed. It is for storing. From one side of the stopper fitting (24), a fitting (30) electrically connected to the loading coil (22) is inserted and caulked at a portion (30a). A tubular body (28) integrated with the antenna core wire (26) is press-fitted from the other side of the stopper (24).

One end (22) of the loading coil (22)
The length from a) to the other end (22b) is approximately 1/4 wavelength,
For example, it is set to 8 to 9 cm for a wireless device using the 900 MHz band. The loading coil base end (22b) is positioned on the upper end surface (1a) of the housing (1) when the antenna is housed. Therefore, when the antenna is housed, it is equivalent to a state in which a rod-shaped antenna having a length of 1/4 wavelength is provided from the upper end surface (1a) of the housing. On the other hand, the length from the front end (26a) to the base end (26b) of the antenna core wire (26) is also set to a length of about ¼ wavelength. Therefore, when the antenna is extended, the total length of the antenna core wire (26) and the loading coil (22) is 1/2 wavelength as shown in FIG. 1, and a 1/2 wavelength rod antenna is erected from the housing. Is equivalent to It should be noted that the lengths of the loading coil (22) and the antenna core wire (26) are affected as the R component and the L component of the housing joint portion (11) and various metal fittings become higher in frequency. Fine-tuned and decided.

When the antenna is housed, the first antenna part (20b) functions as an antenna and the second antenna part (20c) is housed in the longitudinal direction inside the housing.
It almost does not work as an antenna. Therefore, when the antenna is housed, only the first antenna unit (20b), that is, the first antenna unit (20b) having a length of ¼ wavelength is used.
b) functions as an antenna. As a means for preventing the second antenna section (20c) from completely functioning when it is stored, as shown in FIG. 5, the second antenna section is provided with a stopper having a length of ¼ wavelength from the feeding section (7). Part (20a)
There is a method of contacting the grounding piece (32) with. In this way, from the power feeding part (7) to the second antenna part (20c)
The impedance Z as seen at is infinite and almost no power is supplied to the second antenna section (20c). Therefore, radio waves are not radiated from the second antenna unit (20c), and the influence on other electronic components can be completely eliminated.

As described above, the antenna according to the present embodiment is composed of the first antenna section having the loading coil and the second antenna section coupled thereto, and has a length of 1/4 wavelength when the antenna is housed. Since only the first antenna portion having the protrusion protrudes from the housing, it is possible to send and receive even when stored. In particular, an incoming call often arrives when the antenna is housed, such as when carrying, and it is very effective that the incoming call can be detected even when the antenna is housed. It is possible to make a call even with this antenna housed, but it is possible to make a call even if the antenna is extended and the maximum antenna length is 1/2 wavelength.

In addition, since the incoming call can be detected at any time in the state where the antenna is housed, the operator can comfortably carry the antenna and carry the wireless device in a portable state. Further, since it is not necessary to provide a built-in antenna, it is not necessary to provide a means for switching to this and a partition with other mounted parts. Further, it is not necessary to provide a space for arranging these in the housing, the housing is kept small, and the degree of freedom of arrangement of other mounted components is not affected.

Further, since the loading coil is provided and protected inside the knob, it is possible to prevent the coil from being damaged or damaged when the antenna is stored and carried. In addition, it is possible to ensure the call quality without being affected by vibrations and disturbances caused by wind and rain when carrying.

In the above-mentioned embodiments, the case where the second antenna portion is rod-shaped has been described, but it may be an elongated member which can expand and contract. The second embodiment will be described with reference to FIGS. A base end portion (48) of a loading coil (22) is press-fitted and fixed to one end of a tubular member (44) made of metal, and a flexible whip portion (46) is slidably attached to the other end side. It is provided. The whip (46) is composed of a core wire made of a stainless wire and an outer cover made of a resin such as polyacetal provided on the outer circumference of the core wire.
Further, a stopper portion (3a) having the same structure as that of the above embodiment is provided on the base end side. On the other hand, a locking portion (46a) composed of a plurality of leaf springs is provided on the tip end side of the whip portion (46) and is slidably disposed inside the tubular member (44).

The elastic force of the locking portion (46a) is due to the tongue piece (11
It is set to be larger than the elastic holding force according to a). Therefore, when the antenna is stored from the extended state, the locking portion (46a) slides first and the loading coil (2)
The antenna (40) is contracted by contacting the base end (48) of 2). When the antenna is further pushed down in this state, it is stored in the housing (1) while being contracted (see FIG. 7).

The loading coil may be provided not only in the first antenna section but also in the second antenna section. By doing so, the storage space for the antenna can be further reduced.

Although the loading coil is provided inside the knob, the coil may be exposed or covered to form a curl cord.

Further, since the length from the contact portion with the power feeding portion to the tip of the first antenna portion may be a length capable of transmitting and receiving radio waves, for example, the first antenna portion may be all coils. However, a part may be a coil and a part may be linear.

Further, the lengths of the first antenna portion and the second antenna portion can be set to various lengths that allow transmission / reception in addition to the quarter wavelength.

Further, as a loading means, besides the coil, a capacitance ring or a plate-shaped member provided orthogonally to the longitudinal direction of the antenna may be used.

In the above embodiment, the power feeding part is arranged to contact the boundary between the first and second antenna parts via the housing when the antenna is housed, but the invention is not limited to this. That is,
If the length of the first antenna section viewed from the power feeding section is set to an appropriate length, it is possible to make it contact the other position of the antenna.

[0028]

According to the first and second aspects of the present invention, the rod shape is provided.
When the antenna part is pulled out from the housing, the first connection part
Since it has a cross section that is almost the same size as the hole of the power supply part,
The first connection part fits tightly into the power supply part. But
At this time, the rod-like shape previously connected to the first connecting portion
The antenna part is connected to the power supply part via the first connection part.
Therefore, at least the rod-shaped antenna part
Function. In addition, the rod-shaped antenna part was stored in the housing.
If the second connection is a
Since it has a surface, the second connection part is firmly connected to the power supply part.
Get stuck. Therefore, at this time, the second connection part
The loading antenna part connected to the second connecting part
Is connected to the power supply unit via. At this time, the load
At least a part of the swing antenna part protrudes from the housing
It will be in the state of doing. Therefore at this time the loading antenna
The part functions as an antenna. Therefore, the rod-shaped
If the antenna part is stored in the housing, the loading antenna
Since the part functions as an antenna, transmission and reception are also performed at this time.
Is possible. At this time, the loading antenna
Only at least part of the part protrudes from the housing
Therefore, it does not hinder the carrying of the wireless device.
In addition, there is no need to install a built-in antenna.
Since there is no need for switching means with the tenor or the placement space,
The number can be reduced and the housing can be made smaller. Also,
The first connection part or the second connection in the above two states
Since the part fits firmly into the power supply part, either of the above
The state of can be maintained. In addition, the user naturally
And select one of the two states to use
It In addition, the user has a power supply in two states and a first and a first power supply.
Due to the firm fit with the connection part of 2,
You can see that Tena is connected to the power supply
It

[Brief description of drawings]

FIG. 1 is a sectional view showing an extended state of an antenna according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a state where the antenna according to the first embodiment of the present invention is housed.

FIG. 3 is a sectional view showing details of the antenna of the first embodiment of the present invention.

FIG. 4 is a perspective view showing a wireless device to which the antenna of the first embodiment of the present invention is attached.

FIG. 5 is a schematic diagram of a state where the antenna is accommodated in a modification of the first embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a wireless device to which an antenna according to a second embodiment of the present invention is attached.

FIG. 8 is a cross-sectional view showing an extended state of a conventional antenna.

FIG. 9 is a cross-sectional view showing a housed state of a conventional antenna.

FIG. 10 is a perspective view showing a wireless device to which an antenna of a conventional example is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing 7 ... Electric power feeding part 20 ... Antenna 20b ... 1st antenna part 20c ... 2nd antenna part 21 ... Knob 22 ... Loading coil

Claims (12)

(57) [Claims] 1. A housing,Connected to the circuit part of the radio
Provided in a radio having a power supply having a hole of a size
In the antenna, It has a cross section smaller than the predetermined size, and through the hole
Can be stored inside the housing and pulled out of the housing.
Out A possible rod-shaped antenna part, connected to one end of the rod-shaped antenna part,The predetermined
Has a cross section that is approximately the same sizeFirst connection
And provided on the other end of the rod-shaped antenna part,The predetermined
Has a cross section that is approximately the same sizeSecond connection
And a loading antenna part connected to the second connecting part
And when the first connecting portion is in contact with the power feeding portion,
Even if the rod antenna part functions as an antenna
And the second connection part is in contact with the power supply part
IsAt least a part of the loading antenna unit is
Protruding from the caseThe loading antenna unit is
Antenna that functions as a tena. (2)Insert the housing, antenna, and hole of a specified size.
In a wireless device having a power supply section, A circuit unit connected to the power supply unit, The antenna is It has a cross section smaller than the predetermined size, and through the hole
Can be stored inside the housing and pulled out of the housing.
A rod-shaped antenna part that can be taken out, Connected to one end of the rod-shaped antenna part,
A first connection part having a cross section of approximately the same size
When, It is provided at the other end of the rod-shaped antenna part and
Second connection part having a cross section of approximately the same size
When, Loading antenna part connected to the second connection part
When Equipped with Low if the first connection is in contact with the power supply
At least the rod door Antenna functions as an antenna
And the second connection part is in contact with the power supply part
Is at least part of the loading antenna
The loading antenna part is protruded from the housing and
A radio characterized by functioning as a tena. 3. The loading antenna unit includes a coil.
The antenna according to claim 1, wherein: 4. The loading antenna unit includes a coil.
The wireless device according to claim 2, wherein: 5. The case where the second connecting portion is in contact with the power feeding portion
The first connection part is connected to the ground part provided on the housing.
The antenna according to claim 1, wherein the antenna is provided. 6. The case where the second connecting portion is in contact with the power feeding portion
The first connection part is connected to the ground part provided on the housing.
The radio device according to claim 2, wherein the radio device is provided. 7. The electrical length of the loading antenna section is approximately
A contract characterized by having a length corresponding to a quarter wavelength
The antenna according to claim 1. 8. The electrical length of the loading antenna section is substantially the same.
A contract characterized by having a length corresponding to a quarter wavelength
The wireless device according to claim 2. 9. The electrical length of the rod-shaped antenna part is approximately 1 /
4. A length corresponding to 4 wavelengths.
The antenna according to 1. 10. The electrical length of the rod-shaped antenna part is approximately 1.
Claim to have a length corresponding to / 4 wavelength
Item 2. The wireless device according to Item 2. 11. A rod-shaped adapter having a knob for covering the coil.
The antenna part is characterized by having a flexible core wire.
The antenna according to claim 1. 12. A rod-shaped adapter having a knob for covering the coil.
The antenna part is characterized by having a flexible core wire.
The wireless device according to claim 2.