Passive coupling induction coil

Abstract

The invention discloses a passive coupling induction coil. The passive coupling induction coil comprises a coil framework, a coil, a capacitor and a coil framework, wherein the coil framework comprises a framework body; a first baffle edge and a second baffle edge are arranged on the framework body, and the outer edge of the first baffle edge is provided with an end surface used for being mountedwith the capacitor in a matched mode, and a protruding block is arranged at one end, far away from the second baffle edge, of the end face; and two grooves which are distributed at intervals and are communicated with the two ends are formed in the protruding block. By changing the structure of the coil framework, the protruding block is arranged at one end, far away from the second baffle edge, ofthe end surface of the outer edge of the first baffle edge, so that the outer end surface of the capacitor is located between the inner end surface of the first baffle edge and the inner end surfaceof the protruding block after the first section of pin is bent by 90 degrees; and therefore, the winding of the coil on the framework body is not influenced by the capacitor, so that when the induction coil is produced, the pins can be bonded in the grooves in the protruding block at first, and then the first sections of pins are bent for winding, so that the procedures of automatic capacitance adding, pin winding, pin shearing, welding, sleeving and the like are realized, and then automatic quantitative production is realized.

Description

Technical field [0001] The invention relates to radio frequency electronic technology, in particular to an alarm applied to a passive radio frequency identification system, such as a passive coupling induction coil in a supermarket EAS. Background technique [0002] The existing passive coupling induction coil has the following structure: coil bobbin, capacitor, coil, the winding end of the coil bobbin is provided with a winding slot, the two ends of the coil are wound on the two pins of the capacitor, and the pins are placed in the winding slot , During production, the production sequence is as follows: 1. Winding on an automatic winding machine, 2. Adding capacitor: Manually adding capacitors, 3. Winding feet: Manually winding wires and capacitor pins, 4. Cutting feet: Manually Cut off the excess length of the pins, 5, welding: manual soldering, 6, casing: manual casing, 7, drying. In the above production, most of the work is done manually. Because the coil frame and the capaci...

AI Technical Summary

Problems solved by technology

[0002] The existing passive coupling induction coil has the following structure: a coil frame, a capacitor, and a coil. The winding end of the coil frame is provided with a winding slot, and the two ends of the coil are wound on two pins of the capacitor, and the pins are placed in the winding slot. , during production, the production sequence is as follows: 1. Winding on the automatic winding machine, 2. Adding capacitors: adding capacitors manually, 3. Binding feet: manually wrapping the wires and capacitor pins, 4. Cutting fee

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