摘要:
A multi-band dipole antenna includes spaced part first and second radiator sections, first and second mirroring radiator sections, and a balun, which are disposed on a substrate. The first mirroring radiator section is symmetrically disposed with respect to the first radiator section and is spaced apart from the first radiator section. The first radiator section and the first mirroring radiator section cooperate to resonate in a first frequency band. The second radiator section cooperates with the second mirroring radiator section to resonate in a second frequency band.
摘要:
A communications device capable of coupling current reduction includes a first casing, a second casing, and an antenna. The first casing includes a first metal layer part. The second casing includes a second metal layer part. The antenna is adjacent to the first and second metal layer parts when the second casing is at a covering position. The first metal layer part has a surface that confronts the second metal layer part when the second casing is at the covering position and that is formed with a plurality of first recesses. The second metal layer part has a surface that confronts the first metal layer part when the second casing is at the covering position and that is formed with a plurality of second recesses.
摘要:
An antenna includes a dielectric substrate, feeding and grounding elements, a base element, a radiating element, and an interconnecting element. The feeding and grounding elements are formed on the dielectric substrate. The base element is mounted on the dielectric substrate such that the base element is in electrical contact with the feeding and grounding elements. The radiating element is spaced apart from the dielectric substrate. The interconnecting element interconnects the base element and the radiating element.
摘要:
An axillary crutch is disclosed in the invention; the axillary crutch has a body comprised of two opposite shafts, each shaft has a wall portion embedded therein, so that the wall portions may serve as the basis for adjusting and positioning a handgrip. Therefore, the shafts do not need to be formed with holes for securing the handgrip, which not only maintains the strength of the shafts, but also reinforces the strength and security of the axillary crutch as a whole because the shafts are embedded with fortified wall portions therein. Moreover, the position of the handgrip may be adjusted according to the length of a user's arm, and a pivot fitted into the handgrip may hold the opposite shafts together, which prevents the two shafts from becoming deformed or twisted, or buckling due to external forces.
摘要:
A signal integration system for integrating signals of public switched telephone network (PSTN) and Internet protocol (IP) is provided. The system includes a wireless local area network and a signal switch device. PSTN signals can be converted to IP signals via the signal switch device and IP signals can be also converted to PSTN signals via the signal switch device.
摘要:
A communication exchange including a digital route module, an analog route module and a call manager is presented. The digital route module transmits a call signal of a call as the call signal is a digital signal. The analog route module transmits the call signal as the call signal is an analog signal. The call manager has a processor for identifying the call alternatively occurring in the digital route module or the analog route module. The call manager also selects alternatively the digital route module and the analog route module to send the call signal to a destination of the call. Wherein the digital route module together with the call manager are used for signals transmission among the plurality of digital devices, and the analog route module together with the call manager are used for signals transmission among the plurality of analog devices.
摘要:
A crutch comprises a pad enclosing an arm piece, two bow rods connecting the hollow arm piece longitudinally, a handpiece connecting two bow rods transversely, a pipe clamped by the lower portions of two bow rods, an extensible rod inserted beneath the pipe, a tip cushion covering the lower end of the extensible rod, and a mount confining the lower ends of the pipe and two bow rods. A plug is disposed on the upper end of the pipe. The pipe has a plurality of adjusting holes.
摘要:
A folding play crib structure comprising frame tubes, corner joints, middle joints, central bottom joint, U-shaped tubes, V-shaped pull rods, bottom cross tubes and leg joints. One end of the frame tube is pivotally connected with an insert seat which cooperates with the joints for controlling the locking and folding of the crib structure. The U-shaped tubes are pivotally connected at the central portion of the bottom cross tubes to enhance the supporting effect for the bottom of the crib structure. V-shaped pull levers are pivotally connected on one side of the U-shaped tube, whereby when folding the cross tubes, the U-shaped tubes are also folded to ensure safety and more reliably support the crib structure at multiple points of the bottom thereof.
摘要:
A telescopic and foldable crutch structure includes an armpit seat, two telescopic inner tubes each having a top end on which the armpit seat is disposed, two telescopic outer tubes telescopically receiving the inner tubes, a handle adjustably coupling the telescopic inner and outer tubes with each other, a locking cam having a locking pin, two coupling blocks, two outer coupling tubes, an adjusting outer tube, an adjusting inner tube, a cap member fitted on bottom ends of the outer coupling tubes and the adjusting outer tube and a pad member fitted on a bottom end of the adjusting inner. The adjusting outer tube is tightened by the locking cam, The adjusting outer tube, is pivotally connected with the telescopic outer tubes by the locking pin and tightened between the telescopic outer tubes by the locking cam. The locking cam is adapted to be pulled upward, permitting the adjusting outer tube and the outer coupling tubes to be folded upward. The outer coupling tubes are coupled with the coupling blocks which are engaged with the bottom ends of the telescopic outer tubes via two latch springs. The handle is adapted to be rotated for uncoupling the telescopic inner tubes from the telescopic outer tubes for telescopically adjusting the length of the crutch.
摘要:
An antenna includes a grounding element, a connecting element, and first and second radiator elements. The connecting element includes an elongated first connecting section, and a second connecting section connecting the first connecting section to the grounding element. The first radiator element includes a first radiator section extending substantially perpendicular from one side of the first connecting section, and second and third radiator sections extending substantially perpendicular from one side of the first radiator section. The second radiator element includes a first radiator portion extending substantially perpendicular from the one side of the first connecting section, and second and third radiator portions extending substantially perpendicular from one side of the first radiator portion and extending in an opposite direction relative to the second and third radiator sections.