摘要:
The feed point adjustable planar antenna includes a ground component, a main radiation plane, a branch line extended from the main radiation plane, and a ground pin electrically connecting the radiation component with the ground component. If it needs to fine tune the frequency band interval after the design of the antenna is completed, the feed position of the coaxial cable to the branch line can be changed to achieve the fine tuning without cutting the antenna. The ground pin extends from a side edge of the ground component and the branch line is adjacent to the ground component. The branch line and the ground component form a larger coupling range than the conventional planar antenna does. In the mean time, the coaxial cable also has a larger feed range than the conventional planar antenna does.
摘要:
The feed point adjustable planar antenna includes a ground component, a main radiation plane, a branch line extended from the main radiation plane, and a ground pin electrically connecting the radiation component with the ground component. If it needs to fine tune the frequency band interval after the design of the antenna is completed, the feed position of the coaxial cable to the branch line can be changed to achieve the fine tuning without cutting the antenna. The ground pin extends from a side edge of the ground component and the branch line is adjacent to the ground component. The branch line and the ground component form a larger coupling range than the conventional planar antenna does. In the mean time, the coaxial cable also has a larger feed range than the conventional planar antenna does.
摘要:
A multi-branch conductive strip planar antenna is disclosed herein, which is basically a planar antenna with a radiator and a ground plane fed by a transmission line. Specifically, the radiator is composed of a plurality of taper-comb-shaped multi-branch conductive strips. Thus, a broadband antenna can be achieved through a plurality of coupled circuits and a plurality of current paths in the taper-comb-shaped conductive strips.
摘要:
An eye-protection cover quick-release structure includes a spreader, which has a notch and a locating hole at the top side and a contracted passage connected between the notch and the locating hole, a bracket, which has a locating groove for accommodating a part of the spreader and an axle hole, an axle pin, which is insertable through the axle hole of the bracket and the locating hole of the spreader and has a shank and a shoulder, and a handle fastened to the shank of the axle pin and biasable between a pressed position where the shoulder of the axle pin is forced into the locating hole of the spreader to lock the bracket to the spreader and a lifted position where the shank of the axle pin is forced into the locating hole of the spreader and movable through the contracted passage for allowing the bracket to be separated from the spreader.
摘要:
A quick release structure for use in the saw blade guard assembly of a table saw is disclosed to include a mounting member affixed to the base of the table saw, a coupling block detachably attached to the mounting member to hold a pivoted attachment member, for example, a saw blade guard, and a rotary locking member mounted in the coupling block and rotatable relative the coupling block between two positions to lock the coupling block to the mounting member or to release the coupling block.
摘要:
A saw blade lifting mechanism for a sawing machine includes a fixed table having a bottom transverse rod, a bracket pivoted to, a support member fastened to the transverse rod and provided with a sliding slot, a swinging member pivoted to the bracket and turnable backwards and forwards, a motor fixedly fastened to the swinging member and provided with an output shaft fastened with a saw blade, a first connecting member pivoted to the bracket, a second connecting member pivotally coupled between the first connecting member and the motor, a knife member affixed to the second connecting member, and a guide member affixed to the second connecting member and moveably inserted into the sliding slot of the supporting member such that when the swinging member is turned backwards or forwards the saw blade and the knife member can be synchronously lifted up or lowered down.
摘要:
A worktable includes a base supporting a main table and an auxiliary table, two guide rods slidably supported on the auxiliary table, a sliding board slidably supported on the guide rods, a linking mechanism having a linking rod affixed to the bottom wall of the sliding board for carrying the guide rods to move with the sliding board when the sliding board is moved from a first direction to a second direction reversed to the first direction.
摘要:
A worktable includes two first rails arranged in parallel on a base, two guide rods movable along the first rails in a first direction and a second direction reversed to the first direction, two second rails respectively slidably coupled to the guide rods, a sliding plate fixedly mounted on the second rails, and a positioning device for locking the sliding plate to stop the sliding plate from movement relative to the base.
摘要:
A worktable includes two first rails arranged in parallel on a base, two guide rods movable along the first rails in a first direction and a second direction reversed to the first direction, two second rails respectively slidably coupled to the guide rods, a sliding plate fixedly mounted on the second rails, and a positioning device for locking the sliding plate to stop the sliding plate from movement relative to the base.
摘要:
A worktable includes two first rails arranged in parallel on a base, two guide rods movable along the first rails in a first direction and a second direction reversed to the first direction, two second rails respectively slidably coupled to the guide rods, a sliding plate fixedly mounted on the second rails, and a positioning device for locking the sliding plate to stop the sliding plate from movement relative to the base.