JPH0918220A - Compact radio equipment - Google Patents

Abstract

PURPOSE: To further reduce the size of a radio equipment by building an antenna member into a cover part and making this antenna member touch a ground terminal provided on the main body of the radio equipment while the cover part is kept closed to the main body. CONSTITUTION: An antenna member consists of an antenna member 16a which is formed at a hinge part 3 and an antenna member 16b which is formed at a cover part 4. The total length of both members 16a and 16b is set at 2/4. Then the members 16a and 16b are electrically connected to a microstrip line 14 at the joint parts between a main body part 2 and the part 3 and also between the parts 3 and 4 respectively. A conductive ground pin 18 is added to the part 3 and connected to the member 16a. On the other hand, a conductive ground pin holder 20 serving as a ground terminal is placed at a position where the pin 18 touches the part 2 while the part 4 is locked at the part 2. The holder 20 is connected to the easing of the part 2 and then grounded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small radio with a lid, and more particularly to the structure of its antenna.

[0002]

2. Description of the Related Art In a conventional small radio such as a pager with a lid, it is necessary to make a telephone contact by a calling signal received by an antenna, or a message added to the calling signal causes a telephone number of a telephone contact or It is provided that the contact name, contact time, etc. are displayed on a screen such as an LCD.

In such a small radio, an antenna is provided to receive a calling signal.
As this antenna, conventionally, a retractable antenna or a loop antenna is incorporated (for example, JP-A-6-29).
1687), etc. are used.

[0004]

However, the conventional retractable antenna and the loop antenna provided with the following problems have the following problems.

First, in the former retractable antenna,
In order to satisfy the transmission and reception performance, it is necessary to pull it out from the main body to keep a certain distance from the housing and its internal circuit, and further from the human body. Furthermore, the antenna is housed inside the main body. There are problems such as the need to provide a space for time, the reception performance is deteriorated during storage, the antenna is likely to be damaged because it protrudes from the main body when the antenna is pulled out, and there are design restrictions. is there. Particularly, in a recent card type or other thin pager, it is difficult to provide the above-mentioned space for storage due to high-density mounting.

On the other hand, in the latter one using the loop antenna, the antenna efficiency is deteriorated when the conductor is arranged in the vicinity of the direction perpendicular to the opening surface of the loop antenna. Therefore, for example, as shown in FIG. 10, the conductors such as the battery box b and the component mounting board c are arranged at a certain distance from the loop antenna a inside the small radio device,
This prevents the antenna efficiency from deteriorating. However, as a result, there is a limit in reducing the external dimensions of the small radio.

Therefore, an object of the present invention is to provide a small radio device which can always maintain a good transmission / reception state and can further reduce the size of the entire device.

[0008]

The present invention adopts the following constitution in order to solve the above problems.

That is, in the invention according to claim 1,
In a small wireless device in which a lid is rotatably provided in a main body, an antenna member is incorporated in the lid, and the antenna is provided in the main body when the lid is closed with respect to the main body. It is configured to come into contact with the ground terminal.

In a second aspect of the present invention, in a small wireless device in which a hinge portion is provided on a main body portion and a lid portion is rotatably provided on the hinge portion, an antenna is incorporated in the hinge portion.

[0011]

In the small radio apparatus according to the first aspect, the antenna member functions as a monopole antenna when the lid is open. Then, during the operation, the angle of the antenna can be adjusted by adjusting the opening degree of the lid according to the reception environment.

When the lid is closed, the main body is covered and protected by this, and the antenna member serves as an inverted F antenna because it comes into contact with the ground terminal provided on the main body. It is possible to maintain a good transmission / reception environment without being affected.

Further, in the compact radio device according to the second aspect, since the antenna is incorporated in the hinge portion interposed between the main body portion and the lid portion, it is arranged in the vertical direction orthogonal to the opening surface of the antenna. Since the conductor is not arranged, the antenna efficiency is not deteriorated and a good reception environment can be always maintained.

[0014]

Embodiments In this embodiment, a pager with a lid will be described as an example of a small radio with a lid. In addition,
The present invention is not limited to this pager with a lid, but can be applied to other small radios.

Embodiment 1 FIGS. 1 and 2 are perspective views of a pager according to Embodiment 1, FIG. 1 shows a state in which a lid is partially opened, and FIG. 2 shows the lid on the same plane as the main body. They are shown open until they line up.

The pager 1 of the first embodiment has a main body 2
A hinge portion 3 is pivotally attached to one side along the longitudinal direction of the above, and a lid portion 4 is pivotally attached to the hinge portion 3 respectively. An LCD display unit 6 for displaying information is provided on the front surface side of the main body unit 2, and a locking mechanism 8 and an unlocking mechanism 10 for locking and unlocking the lid unit 4 are arranged to cover the lid unit 4. By locking the lock mechanism 8, LC
The D display portion 6 is covered with the lid portion 4 so as to be protected. Further, inside the main body 2, an RF circuit 12 and a microstrip line 14 that form a wireless unit are provided on a component mounting board (not shown).

The hinge portion 3 is provided so that the LCD display portion 6 is inclined with respect to the horizontal plane to improve the visibility when the lid portion 4 is bent to the back surface side of the main body portion 2.

Further, in this example, the hinge portion 3 to the lid portion 4
The antenna member 16 is installed in a line shape over the entire length.

This antenna member 16 comprises an antenna member 16a formed on the hinge portion 3 and an antenna member 16b formed on the lid portion 4, both of which are made of a conductive thin metal plate. The total length of both 16a and 16b is set to λ / 4 (λ is the wavelength of the radio wave). The microstrip line 14, the antenna member 16a, and both antenna members 16a and 16b are
The main body portion 2 and the hinge portion 3, and the hinge portion 3 and the lid portion 4 are electrically connected to each other at respective pivotally connected portions.

In the first embodiment, the hinge portion 3 is provided with a conductive ground pin 18 projecting therefrom, and the ground pin 18 is connected to the antenna member 16a formed on the hinge portion 3. On the other hand, on the main body 2 side, a conductive ground pin receiver 20 as a ground terminal is provided at a position where the ground pin 18 contacts when the lid 4 is locked to the main body 2. The receiver 20 is connected to the housing of the main body 2 and is grounded.

Therefore, in this structure, the main body 2
When the lock release mechanism 10 of FIG. 3 is operated to release the lid 4 from the main body 2 and open as shown in FIG.
As shown in (a), since the ground pin 18 is separated from the ground pin receiver 20, the antenna member 16 is a quarter-wave monopole antenna. That is, the antenna member 16 is
It is connected to the RF circuit 12 via the microstrip line 14 to perform wireless transmission / reception. At that time, the angle of the antenna member 16 can be arbitrarily adjusted by adjusting the degree of opening of the lid portion 4 according to the reception environment.

On the other hand, when the lid 4 is closed and the lid 4 is locked by the lock mechanism 8 of the main body 2, the ground pin 18 contacts the ground pin receiver 20 as shown in FIG. 3B. Being grounded, the antenna member 16 acts as a so-called inverted F antenna.

Although the hinge portion 3 is provided in the first embodiment, the hinge portion 3 may be omitted.
In that case, it is necessary to provide the cover 4 with the ground pin 18 and connect the ground pin 18 to the antenna member 16b.

Embodiment 2 FIG. 4 is a plan view of a pager according to Embodiment 2, and FIG.
6 is a perspective view of the pager of FIG. 5 as seen from the back position indicated by reference numeral A. In all of these figures, the lid is bent to the back side of the main body and placed on a desk or the like. It shows the state of being done. 4 to 6, parts corresponding to those in FIGS. 1 and 2 of the first embodiment are designated by the same reference numerals.

The feature of the second embodiment is that the small antenna member 30 and its matching circuit 32 are built in the hinge portion 3.

That is, the antenna member 30 is made of a conductive thin metal plate, and is formed as a so-called loop antenna in a loop shape along the plane of the hinge portion 3.

The antenna member 30 and the matching circuit 32 are connected to the microstrip line 14 via a pivotal connecting portion 34 made of a conductive member that rotatably connects the main body 2 and the hinge portion 3. And is connected to an RF circuit (not shown).

When the small radio 1 of this structure is used by placing it on a desk 38 or the like, as shown in FIG. 5, if the lid 4 is bent to the back side of the main body 2, the LCD display is displayed. Since 6 is inclined with respect to the horizontal plane, the visibility is improved.

At this time, the hinge portion 3 stands up vertically from the horizontal surface of the desk 38. At this time, in the direction perpendicular to the opening surface of the antenna member 30 (loop antenna), a battery box, a component mounting board, etc. Since the conductors are not close to each other, the antenna efficiency does not deteriorate.

Moreover, as shown in FIG. 7A, when the desk 38 is used as a base plate, an image 30 'of the loop antenna is generated on the opposite side of the base plate. During radio wave transmission / reception, the currents generated in these loop antennas 30 and 30 'cancel each other in the opposite directions in the adjacent portions as shown in the figure, so the loop antennas are equivalently shown in FIG. 7 (b). As shown, the aperture area of the loop is substantially increased, resulting in greater than apparent antenna gain.

In the second embodiment described above, the small antenna member 30 and its matching circuit 32 are built in the hinge portion 3, and these 30, 32 are connected to each other via the pivotally connecting portion 34. Although it is connected to the strip line 14, the configuration shown in FIG. 8 is also possible.

That is, in the structure shown in FIG. 8, the loop-shaped antenna member 30 is provided on the hinge portion 3 as in the second embodiment, and the loop-shaped antenna member 30 is provided on one side of the main body portion 2 adjacent to the antenna member 30. The antenna member 40 and the matching circuit 42 are provided, and the antenna member 40 and the matching circuit 42 are connected to the microstrip line 14 of the main body 2.

Further, unlike the case shown in FIG. 6, the antenna member 30 provided on the side of the hinge portion 3 is arranged and arranged mechanically independent of the antenna member 40 and the matching circuit 42 on the side of the main body portion 2. .

In the configuration of FIG. 8 as well, when the small radio 1 is placed on the desk 38 or the like and used, if the lid portion 4 is bent to the back surface side of the main body portion 2, the hinge portion 3 will be formed. As shown in the drawing, the antenna member 30 on the hinge portion 3 side and the antenna member 40 on the main body portion 2 side are adjacent to each other in the vertical direction, rising vertically from the horizontal plane of 38.

When a current is generated in one antenna member, for example 40, during transmission / reception of a radio wave, a current is also generated in the other antenna member 30 by being induced by the current. Moreover, FIG.
As shown in (a), when the desk 38 is used as a ground plane, loop antenna images 30 'and 40' are generated on the opposite side of the ground plane. When transmitting and receiving radio waves, these loop antennas 40,
The currents generated at 30, 30 'and 40' are, as shown,
The loop antennas are equivalent to each other as shown in FIG. 9B because the opposite directions cancel each other out in the portions adjacent to each other. That is, since the loop opening area is further increased as compared with the case of the second embodiment in which the antenna member 30 is provided only on the hinge portion 3, a larger antenna gain can be obtained.

Moreover, the antenna members 30 and 40 provided on the hinge portion 3 side and the main body portion 2 side, respectively, are not connected to the pivotally connecting portion 34 that rotatably connects the main body portion 2 and the hinge portion 3. Since they are mechanically independent, failure is unlikely to occur, which is also advantageous from this point.

In FIGS. 6 and 8, the antenna members 30 and 40 are both formed in a loop shape to form a loop antenna. However, the present invention is not limited to this, and the antenna members are line-shaped. It is also possible to form a dipole antenna by forming the above.

[0038]

According to the present invention, the following effects can be obtained.

(1) In the small radio device according to any one of claims 1 and 2, since the antenna member is arranged on the lid portion or the hinge portion, it is housed inside the main body such as a retractable antenna. It is possible to achieve further miniaturization by overcoming the conventional drawbacks such as no need to provide a space for doing so and being less likely to be damaged because it does not protrude from the radio body.

(2) Particularly, in the small radio of the invention according to claim 1, when the lid is open, the antenna member is
It acts as a monopole antenna, and when the lid is closed, the main body is covered and protected by this, and the antenna member comes into contact with the ground terminal provided on the main body, thus forming an inverted F antenna. , It will not be affected by the housing of the main body. Therefore, a good transmission / reception environment can always be maintained.

(3) In particular, in the small radio device of the invention according to claim 2, since the antenna is incorporated in the hinge portion interposed between the main body portion and the lid portion, the antenna opening surface is Since the conductors are not arranged in the vertical direction orthogonal to each other, the electric field condition is stable, and a good reception environment can always be maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pager with a lid according to a first embodiment of the present invention, showing a state in which a lid is opened halfway.

FIG. 2 is a perspective view of a pager with a lid according to the first embodiment of the present invention, showing a state in which the lid is open until it is lined up on the substantially same plane as the main body.

FIG. 3 is an explanatory view showing a state in which the lid is opened and a state in which the lid is closed in the pager with a lid according to the first embodiment of the present invention.

FIG. 4 is a plan view of a pager with a lid according to a second embodiment of the present invention.

FIG. 5 is a side view of a pager with a lid according to a second embodiment of the present invention.

6 is a perspective view of the pager with lid of FIG. 5 as viewed from the back position indicated by reference symbol A. FIG.

FIG. 7 is an explanatory diagram of a transmission / reception state of a pager with a lid according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a modified example of the second embodiment of the present invention.

9 is an explanatory diagram of a transmission / reception state of the pager with a lid having the configuration of FIG.

FIG. 10 is a perspective view showing an arrangement state inside a pager.

[Explanation of symbols]

1 ... Pager with lid (small radio), 2 ... Main body, 3 ...
Hinge part, 4 ... Lid part, 6 ... LCD display part, 12 ... RF circuit, 14 ... Microstrip line, 16 (16a, 16)
b), 30, 40 ... Antenna member, 18 ... Ground pin, 20
… Ground pin receiver (ground terminal), 32, 42… Matching circuit.

Claims (2)

[Claims] 1. A small wireless device having a lid rotatably provided on a main body, wherein an antenna member is incorporated into the lid, and the antenna is provided in a state where the lid is closed with respect to the main body. A small wireless device, wherein a member is configured to come into contact with a ground terminal provided on the main body. 2. A small wireless device in which a hinge part is provided on a main body part and a lid part is rotatably provided on the hinge part, wherein an antenna is incorporated in the hinge part. .