JPH05226918A - Antenna built-in type positioning device - Google Patents

Abstract

PURPOSE:To reduce a volume as a product and to always implement positioning when the device is in use by providing a cover member capable of opening/ closing and a plane antenna integrated with the cover member to the device. CONSTITUTION:A key section 31 and an element section 32 are juxtaposed on the upper side of a housing 30, and a housing cover member 34 for a CD (Compact Disk) memory 34 is arranged to the upper face of the housing 30 adjacent to the key section 31 and the display section 31. The housing cover member 34 is made of a non-metal, and the plane antenna 35 being a microstrip patch antenna is assembled in the inside. The housing cover member 34 is turned in a direction indicated by an arrow 36 and opened/closed. Since the plane antenna 35 is assembled to the housing cover member 34 being usually a dead space in such a manner, the volume of the product is reduced and it is possible to always make positioning when the device is in use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device with a built-in antenna used in navigation systems and the like.

[0002]

2. Description of the Related Art Most of positioning devices for navigation are for ships and vehicles, and their antennas are composed of parts separate from the positioning device. However, in a portable navigation system, it is necessary to incorporate an antenna in the positioning device itself.

12 and 13 are perspective views showing an external structure of an example of a conventional positioning device with a built-in antenna. In the positioning device of FIG. 12, the antenna unit 13 is arranged on the upper surface of the housing 10 along with the key unit 11 and the display unit 12.
Is provided. Further, in the positioning device of FIG. 13, the key portion 21 and the display portion 22 are provided on the upper surface of the housing 20.
Is provided, and a rotary helical antenna unit 23 is provided on the side of the housing 20.

[0004]

According to the conventional positioning device with a built-in antenna as described above, when the CD (compact disk) memory driver is additionally provided and an attempt is made to reduce the size, the antenna housing portion is secured. Is a big problem. This is because other components cannot be arranged on the upper surface of the antenna due to the property of receiving radio waves. For this reason, it is conceivable to reduce the area of the display portion, increase the area of the front surface of the housing, or dispose the antenna on the back surface. However, in both cases, operability is deteriorated.

Therefore, the present invention provides a positioning device with a built-in antenna, which can reduce the volume of the product and can always perform a positioning operation during use.

[0006]

According to the present invention, there is provided a positioning device with a built-in antenna, which includes an openable / closable cover member and a planar antenna incorporated in the cover member.

The cover member may be a cover member for the CD storage portion or a cover member for the display portion.

The cover member for the display unit may be configured to open and close by rotation.

Furthermore, a cable for electrically connecting the planar antenna and the electronic component and a casing surrounding the electronic component are provided, and a recess for fitting the above-mentioned cable is provided in the casing. May be

[0010]

Since the planar antenna is built in the cover member which is normally a dead space, the volume of the product can be reduced and the positioning operation can be always performed at the time of use.

[0011]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view schematically showing the external structure of a navigation positioning device with a built-in antenna as an embodiment of the present invention.

As shown in the figure, a key portion 31 and a display portion 32 are provided side by side on the upper surface of the housing 30, and a CD (compact disc) is provided on the upper surface adjacent to the key portion 31 and the display portion 32. ) A storage portion cover member 34 for the memory 33 is arranged. The housing cover member 34 is made of non-metal, and a planar antenna 35, which is a microstrip patch antenna, is incorporated inside the cover member 34. The storage section cover member 34 is configured to be opened and closed by rotating in the direction indicated by the arrow 36. Next to the storage section cover member 34, a key section 37 for controlling the CD memory driver is provided.

As described above, since the planar antenna 35 is incorporated in the housing cover member 34 which is normally a dead space, the volume of the navigation positioning device can be reduced. Moreover, since the planar antenna 35 is located on the upper surface, it is possible to always perform the positioning operation during use.

FIG. 2 is a sectional view taken along line II-II of FIG. 1 in order to clarify the structure of the housing cover member 34. Therefore, the configuration of the portion other than the storage portion cover member 34 is omitted in FIG.

The planar antenna 35 is a cover member 34 for the housing portion.
Is attached to the back surface of the
It is connected to the communication cable 39 via. The storage unit cover member 34 is further provided with a mounted CD memory 33.
A CD pressing member 40 for fixing is attached.

As is well known, in the navigation system, a large amount of data such as map data is stored in the CD memory 33.

FIG. 3 is an exploded view for explaining the internal structure of the navigation positioning device according to this embodiment.

Inside the housing 30, in addition to the above-described keyboard 41 in the key portion 31, the display plate 42 in the display portion 32, and the keyboard 43 in the key portion 37 for controlling the CD memory driver, the CD memory driver 45 and the control are provided. A board 46, a metal housing 47 containing various electronic components, and a battery 48 are mounted on the board 49. The electronic components in the housing 47 and the planar antenna 35
And are connected by a coaxial communication cable 39.

FIG. 4 is a view for explaining the internal structure of the housing 47.

In the housing 47, an analog circuit 47a connected to the planar antenna 35 via a coaxial cable 39.
And an A / D conversion circuit 47b for converting an analog signal from the analog circuit 47a into a digital signal, and a digital circuit 47c are sequentially arranged in a straight line. The output terminal of the digital circuit 47c is the digital signal line 50. It is connected to the control board 46 via.

As is apparent from the figure, in this embodiment, the analog input terminal and the digital output terminal are provided in the housing 47.
Are located on opposite sides of each other. As a result, the signal 47d flows linearly, and the influence of noise is reduced. On the contrary, as shown in FIG. 14, the analog input terminal and the digital output terminal are connected to the housing 5.
In the conventional technique arranged so as to be located on the same side of No. 1, the signal 51d flows in a loop and the analog circuit 51a receives noise from the digital circuit 51c.

Since the analog input terminal and the digital output terminal are located on the opposite side surfaces of the housing 47,
The coaxial cable 39 for analog input is routed to the opposite surface, but the radius of curvature R (see FIG. 5) of the bent portion of the cable 39 in this case is R in order to avoid the influence of the capacity of the cable 39. It is preferable that ≦ 5r. However, r is the diameter of the cable 39.

As a method of routing the coaxial cable 39 to the opposite side of the housing 47, the cable may be simply routed along the side wall of the housing 47 as shown in FIG. 6, but according to this, the cable is held. A holding member is required, and the entire shape is enlarged by the diameter of the coaxial cable. For this reason, as shown in FIG. 7, a side portion (at least one side portion) of the upper surface of the housing 52 is cut out to form a concave portion 53 that allows the diameter of the cable, and the coaxial cable 54 is fitted into the concave portion 53. Alternatively, as shown in FIG. 8, it is preferable to provide a concave portion 56 in the upper surface of the housing 55 with the diameter of the cable taken into consideration, and fit the coaxial cable 57 in the concave portion 56. As a result, the space occupied by the coaxial cable can be reduced, and the volume of the navigation positioning device can be further reduced.

FIG. 9 is a perspective view schematically showing the external structure of a navigation positioning device with a built-in antenna as another embodiment of the present invention, and FIG. 10 is a perspective view of the navigation positioning device with a cover member rotated. It is a perspective view showing an opened state.

As shown in both figures, a key portion 61 and a display portion 62 are provided side by side on the upper surface of the housing 60. A display cover member 63 is arranged to cover the display 62 when not in use. This cover member 6
3 is configured to be rotatable about a shaft 63a in parallel with the upper surface of the housing 60, and when used, it is rotated and opened as shown in FIG. 10 so that the display portion 62 can be seen. A planar antenna, which is a microstrip patch antenna, is incorporated inside the cover member 62.

As described above, since the plane antenna is incorporated in the display cover member 63 which is normally a dead space, the volume of the navigation positioning device can be reduced. Of course, it is also advantageous for protecting the display unit 62 when not in use. Moreover, since the planar antenna is located on the upper surface, it is possible to always perform the positioning operation during use.

FIG. 11 is a perspective view schematically showing an external structure of a navigation positioning device with a built-in antenna as a further embodiment of the present invention.

As shown in the figure, a key portion 71 and a display portion 72 are provided side by side on the upper surface of the housing 70. A display cover member 73 is provided so as to cover the display 72 when not in use. This cover member 7
3 is configured to be rotatable around a shaft 73a, and when used, it is rotated as shown in FIG. A planar antenna, which is a microstrip patch antenna, is incorporated inside the cover member 73.

As described above, since the flat antenna is incorporated in the display cover member 63 which is normally a dead space, the volume of the navigation positioning device can be reduced. Of course, it is also advantageous for protecting the display section 72 when not in use. Moreover, since the planar antenna is located on the upper surface, it is possible to always perform the positioning operation during use.

[0031]

As described above in detail, according to the present invention, since the cover member that can be opened and closed and the planar antenna incorporated in the cover member are provided, the volume of the product can be reduced. It is possible to always perform positioning operation when using.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing an external structure of a navigation positioning device with a built-in antenna as an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an exploded view of the navigation positioning device according to the embodiment of FIG.

FIG. 4 is a diagram for explaining the configuration inside the housing in the embodiment of FIG.

FIG. 5 is a diagram illustrating a radius of curvature of a bent portion of a coaxial cable.

FIG. 6 is a perspective view showing an example of a method of routing the coaxial cable to the opposite side surface of the housing.

FIG. 7 is a perspective view showing an example of a method of routing the coaxial cable to the opposite side surface of the housing.

FIG. 8 is a perspective view showing an example of a method of routing the coaxial cable to the opposite side surface of the housing.

FIG. 9 is a perspective view schematically showing the external structure of a navigation positioning device with a built-in antenna as another embodiment of the present invention.

10 is a perspective view showing a state where the cover member of the navigation positioning device of FIG. 9 is rotated and opened.

FIG. 11 is a perspective view schematically showing the external structure of a navigation positioning device with a built-in antenna as a further embodiment of the present invention.

FIG. 12 is a perspective view showing an external structure of an example of a conventional positioning device.

FIG. 13 is a perspective view showing an external structure of another example of a conventional positioning device.

FIG. 14 is a diagram illustrating a conventional arrangement of electronic circuits in a housing.

[Explanation of symbols]

 30, 60, 70 Housing 31, 37, 61, 71 Key part 32, 62, 72 Display part 33 CD memory 34, 63, 73 Cover member 35 Flat antenna 39, 54, 57 Communication cable 47, 52, 55 Housing 53 , 56 recess

Claims (5)

[Claims] 1. A positioning device with a built-in antenna, comprising an openable / closable cover member and a planar antenna incorporated in the cover member. 2. The positioning device with a built-in antenna according to claim 1, further comprising a CD storage portion, wherein the cover member is a cover member for the CD storage portion. 3. The positioning device with a built-in antenna according to claim 1, further comprising a display unit, wherein the cover member is a cover member for the display unit. 4. The positioning device with a built-in antenna according to claim 3, wherein the cover member for the display unit is configured to open and close by rotation. 5. A cable that electrically connects between the planar antenna and the electronic component, and a casing that surrounds the electronic component are provided, and a recess for fitting the cable is provided in the casing. The positioning device with a built-in antenna according to claim 1.