| 摘要 |
A moving iron sounding device includes a casing, a diaphragm sounding system, and a magnetic circuit system. The magnetic circuit system includes a dual-rectangle-shaped magnetic circuit, an inductance coil, and an armature. The diaphragm sounding system includes a support ring and a composite diaphragm. The composite diaphragm includes a diaphragm sheet and a metal sheet. One end of the metal sheet is welded to the vibration portion through a connecting arm, and another end of the metal sheet is connected to the support ring. The present invention achieves a stable connection of the diaphragm sounding system and the magnetic circuit system and ensures the quality of the product. During the process of assembly, the adhesive won't be spilled on the diaphragm. |
| 主权项 |
1. A moving iron sounding device, comprising a casing, a diaphragm sounding system, and a magnetic circuit system, the diaphragm sounding system and the magnetic circuit system being located in the casing; the magnetic circuit system comprising a dual-rectangle-shaped magnetic circuit, an inductance coil, and an armature, the armature having a vibration portion, the vibration portion passing through the inductance coil, a free end of the vibration portion being suspended in the dual-rectangle-shaped magnetic circuit; the diaphragm sounding system including a support ring and a composite diaphragm, the support ring having an opening, the composite diaphragm being disposed on top of the support ring to cover the opening of the support ring; the composite diaphragm including a diaphragm sheet and a metal sheet which are composited to become one-piece; a first end of the metal sheet being connected with the vibration portion, an interval being defined between the first end of the metal sheet and an inner wall surface of the opening of the support ring, a second end of the metal sheet being directly attached to the support ring, the metal sheet being connected with a connecting arm, a distal end of the connecting arm being provided with a welding portion, the welding portion being welded to the free end of the vibration portion;
wherein a distal end face of the second end of the metal sheet is attached to the inner wall surface of the support ring, an upper surface of the second end of the metal sheet is flush with an upper surface of the support ring; a circumferential edge of the diaphragm sheet extends out of the second end of the metal sheet to be attached to the upper surface of the support ring, or the distal end face the second end of the metal sheet is flush with a corresponding end face of the diaphragm sheet, and the second end of the metal sheet is directly attached to the upper surface of the support ring. |
