A Magnetic Drive Mechanism for a Balanced Armature Receiver

Abstract

The invention discloses a magnetic driving mechanism for a balanced armature telephone receiver. The magnetic driving mechanism is applied to the telephone receiver, and comprises an armature, iron core sheets, a coil and permanent magnets, wherein the armature comprises a vibrating energy conversion part positioned on the middle part of the armature, magnetic conduction parts on two side wings, and a connecting part at a tail end; the connecting part is used for connecting the magnetic conduction parts with the vibrating energy conversion part; the coil is sleeved on the vibration energy conversion part; the iron core sheets are arranged on the upper side and the lower side of the vibration energy conversion part respectively along the vibrating direction of the vibrating energy conversion part, and are fixedly connected with the magnetic conduction parts to form an enclosed magnetic conduction loop; and the permanent magnets are arranged on the upper side and the lower side of the vibrating energy conversion part, and are fixedly connected with the inner sides of the iron core sheets respectively. According to the magnetic driving mechanism disclosed by the invention, the iron core sheets and the armature are directly and fixedly connected to form the enclosed magnetic conduction loop, and the way for taking a ''hollow-square'' iron core as a magnetic conduction loop in the conventional balanced armature telephone receiver is replaced, so that high magnetic conductivity is kept, the structure of the armature telephone receiver can be balanced, and the production cost is lowered.

Description

technical field [0001] The invention relates to a sounding device, in particular to a magnetic drive mechanism of a balanced armature type receiver. Background technique [0002] Moving iron has many advantages, such as good sound insulation effect of moving iron, smaller and lighter volume, higher sensitivity than moving coil, more stable frequency response curve of moving iron, etc. Moving iron earphones also help to protect hearing, so moving iron is widely used in the earphones. The important factor that determines the quality of the moving iron is the production of the balanced armature receiver. [0003] Generally, the magnetic drive mechanism of the balanced armature type receiver adopts the method that the "back" shaped iron core is sleeved on the armature and fixedly connected. The volume of the existing balanced armature type receiver is getting smaller and smaller, and the "back" The processing requirements of the shaped iron core are also increasing day by day....

AI Technical Summary

Problems solved by technology

The production of "back"-shaped iron cores often adopts die-casting, stamping or drawing processes to process hollow cavities. Due to the small size, the requirements for mold processing accuracy are also continuously improved, which will greatly increase production costs.

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