This application claims priority of Taiwanese Application No. 104206385, filed on Apr. 27, 2015.
The disclosure relates to an antenna device, and more particularly to a telescopic antenna device.
Generally, an antenna is for receiving signals in a certain frequency range, for example, from 470 Mhz to 860 Mhz. Theoretically, the antenna that is capable of receiving a signal having a frequency of 470 Mhz has a length of about 32 centimeters. Such antenna may be configured as a telescopic rod for the consideration of delivery and storage thereof. However, an exposed telescopic rod may be dangerous and is not visually aesthetic.
Therefore, an object of the disclosure is to provide an antenna device that can overcome at least one of the aforesaid drawbacks associated with the prior arts.
According to the disclosure, the antenna device includes a casing unit and an antenna unit. The casing unit includes a main casing, and two auxiliary casings each of which projects from a respective one of two opposite ends of the main casing along an axis and is movable relative to the main casing along the axis between an extended position and a retracted position. The antenna unit includes a main antenna module that is disposed in the main casing, and two auxiliary antenna modules that are respectively disposed in the auxiliary casings. Each of the auxiliary antenna modules has at least one contact point at an end thereof that is electrically coupled to the main antenna module, and at least one fixing point at an opposite end thereof that is fixed to a corresponding one of the auxiliary casing such that, when at least one of the auxiliary casings is moved from the retracted position to the extended position, a total length of the antenna unit along the axis is increased.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which:
Before the disclosure is described in greater detail, it should be noted that like elements are denoted by the same reference numerals throughout the disclosure.
Referring to
The casing unit 1 includes a main casing 11, and two auxiliary casings 12 that respectively project from two opposite ends of the main casing 11 along an axis (A). Each of the auxiliary casings 12 is movable relative to the main casing 11 along the axis (A) between an extended position (see
The antenna unit 2 includes a main antenna module 21 that is disposed in the main casing 11, and two auxiliary antenna modules 22 that are respectively disposed in the auxiliary casings 12. The main antenna module 21 includes a rectangularly-shaped main circuit board 211 that has a plurality of contact points 212. Each of the auxiliary antenna modules 22 includes two telescopic antenna rods 221. Each of the antenna rods 221 of the auxiliary antenna modules 22 has opposite ends respectively serving as a contact point 222 and a fixing point 223.
In this embodiment, the main circuit board 211 of the main antenna module 21 has four contact points 212 that are respectively located at four corners of the main circuit board 211. Each of the contact points 212 of the main circuit board 211 is electrically coupled to the contact point 222 of a respective one of the antenna rods 221 of the auxiliary antenna modules 22 for increasing the bandwidth of the antenna unit 2. The lower piece 122 of each of the auxiliary casings 12 is fixed to the fixing points 223 of the antenna rods 221 of a corresponding one of the auxiliary antenna modules 22. The antenna rods 221 of each of the auxiliary antenna modules 22 are spaced apart from each other in a direction perpendicular the axis (A), so that each of the auxiliary casings 12 is able to move smoothly relative to the main casing 11.
When each of the auxiliary casings 12 is at the retracted position (see
Referring to
The antenna unit 2 includes a main antenna module 21 that is disposed in the main casing 11, and two auxiliary antenna modules 23 that are respectively disposed in the auxiliary casings 12. The main antenna module 21 includes a rectangularly-shaped main circuit board 211 that has a plurality of contact points 212. Each of the auxiliary antenna modules 23 is configured as a flexible circuit board that has an antenna circuit 231 provided with a contact point 232, and a fixing point 233 located at an end thereof distal from the main antenna module 21 and fixed to a corresponding one of the auxiliary casings 12.
In this embodiment, the main circuit board 211 of the main antenna module 21 has two contact points 212 that are respectively located at two opposite ends of the main circuit board 211 along the axis (A). Each of the contact points 212 of the main circuit board 211 is electrically coupled to the contact point 232 of the antenna circuit 231 of a respective one of the auxiliary antenna modules 23 for increasing the bandwidth of the antenna unit 2.
When each of the auxiliary casings 12 is at the retracted position (see
Referring to
The antenna unit 2 includes a main antenna module 21 that is disposed in the main casing 11, and two auxiliary antenna modules 24 that are respectively disposed in the auxiliary casings 12. The main antenna module 21 includes a rectangularly-shaped main circuit board 211 that has a plurality of contact points 212. Each of the auxiliary antenna modules 24 includes two flexible wire antennas 241. Each of the wire antennas 241 of the auxiliary antenna modules 24 has opposite ends respectively serving as a contact point 242 and a fixing point 243. In this embodiment, the main circuit board 211 of the main antenna module 21 has four contact points 212 that are respectively located at four corners of the main circuit board 211. Each of the contact points 212 of the main circuit board 211 is electrically coupled to the contact point 242 of a respective one of the wire antennas 241 of the auxiliary antenna modules 24 for increasing the bandwidth of the antenna unit 2. The lower piece 122 of each of the auxiliary casings 12 is fixed to the fixing points 243 of the wire antennas 241 of a corresponding one of the auxiliary antenna modules 24.
When each of the auxiliary casings 12 is at the retracted position (see
To sum up, since the antenna unit 2 is enclosed within the casing unit 1, the antenna device of this disclosure is visually aesthetic and is safe in the use thereof.
While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Number | Date | Country | Kind |
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104206385 | Apr 2015 | TW | national |