CN201563227U - miniature sounder - Google Patents

Abstract

The utility model provides a miniature sounder, which comprises a lower cover plate provided with a first cavity, a magnetic bowl embedded in the first cavity of the lower cover plate, a magnetic steel accommodated in the magnetic bowl, a The frame on the board, the coil accommodated in the magnetic gap formed by the magnetic bowl and the magnetic steel, the diaphragm connected to one end of the coil, the upper cover connected to the lower cover to form a storage space for the above-mentioned components, and the upper cover is arranged on the upper The sound hole on the cover plate, the frame is arranged between the lower cover plate and the upper cover plate, the frame includes a first plane away from the lower cover plate, a second plane close to the lower cover plate and a first plane passing through the first plane and the second plane Two cavities, the vibrating membrane is placed on the first plane, and there is a gap between the vibrating membrane and the upper cover. The micro sound generator with this structure can increase the volume of the front cavity.

Description

micro sounder

technical field

The utility model relates to a miniature sounder, in particular to a miniature sounder applied to portable consumer electronic products such as mobile phones.

Background technique

Miniature sound generating devices are widely used in portable electronic devices such as mobile phones, notebook computers, and hearing aids. With the rapid development of these portable electronic devices, people's functional requirements are getting stronger and stronger, and the miniature sound-generating devices applied to them are also developing correspondingly and rapidly.

The micro-sounder of the related structure mainly includes a bowl-shaped base, an upper cover connected to the base and provided with a sound hole, and the base and the upper cover form a cavity. The cavity is provided with a permanent magnet and a pole piece housed in the base and forming a magnetic gap with the base, a diaphragm bonded to the upper cover, and a voice coil connected to the diaphragm and suspended in the magnetic gap 1. A circuit board is arranged on the outside of the base to realize the connection with the external circuit, and the incoming and outgoing wires of the voice coil pass through the holes provided on the base to connect with the circuit board. When the alternating audio current is applied to the circuit board, when the alternating current is passed into the coil, the voice coil will move in the magnetic gap due to the action of the magnetic field, and this movement will also change with the change of the current , so as to drive the diaphragm to vibrate up and down, resulting in the production of sound.

But when the miniature sounder of this related structure is designed, the front chamber of product is less, thereby, be necessary to research a kind of miniature sounder with new structure.

Utility model content

The technical problem to be solved by the utility model is to provide a miniature sound generator that can increase the volume of the front cavity.

In order to solve the problems of the technologies described above, the technical solution provided by the utility model is:

A miniature sound generator, which comprises a lower cover plate with a first cavity, a magnetic bowl embedded in the first cavity of the lower cover plate, a magnetic steel accommodated in the magnetic bowl, a frame arranged on the lower cover plate, The coil accommodated in the magnetic gap formed by the magnetic bowl and the magnetic steel, the diaphragm connected to one end of the coil, the upper cover connected to the lower cover to form a storage space for the above-mentioned components, and the acoustics arranged on the upper cover hole, the frame is arranged between the lower cover and the upper cover, the frame includes a first plane away from the lower cover, a second plane close to the lower cover and a second cavity passing through the first plane and the second plane, the vibration The diaphragm is placed on the first plane, and there is a gap between the diaphragm and the upper cover.

Preferably, the micro-sounder further includes a pole piece attached to the magnetic steel.

The beneficial effect of the utility model is that: since the frame is arranged between the lower cover and the upper cover, the frame includes a first plane far away from the lower cover, a second plane close to the lower cover and passing through the first plane and the second plane. In the second cavity, the diaphragm is placed on the first plane, and there is a gap between the diaphragm and the upper cover, so the volume of the front cavity is increased.

Description of drawings

Fig. 1 is the stereogram that the utility model provides miniature sounder;

Fig. 2 is the sectional view of the miniature sounder provided by the utility model;

Fig. 3 is a three-dimensional exploded schematic view of the miniature sound generator provided by the utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Referring to Fig. 1, the miniature sounder of the present utility model is mainly used in portable consumer electronic products such as mobile phones, to issue sound prompts.

Referring to FIG. 2 and FIG. 3 , the miniature sounder provided by the utility model includes a lower cover plate 2 , a frame 8 , a magnetic bowl 7 , a magnetic steel 6 , a coil 4 , a diaphragm 3 and an upper cover 1 . Wherein, the lower cover 2 is provided with a first cavity 21, and the frame 8 is provided with a first plane 81 away from the lower cover 2, a second plane 82 close to the lower cover 2, and passing through the first plane 81 and the second plane 82. The second cavity 83.

Its assembly relationship is:

The magnetic bowl 7 is embedded in the first cavity 21 of the lower cover, the magnetic steel 6 is accommodated in the magnetic bowl 7, the frame 8 is arranged on the lower cover 2, and the coil 4 is accommodated in the magnetic gap formed by the magnetic bowl 7 and the magnetic steel 6 The diaphragm 3 is connected to one end of the coil 4, the upper cover 1 is connected to the lower cover 2 to form a storage space for accommodating the above-mentioned components, and the sound hole 11 is arranged on the upper cover 1 (see FIG. 1 ).

Wherein, the frame 8 is arranged between the lower cover 2 and the upper cover 1 , and the diaphragm 3 is placed on the first plane 81 , referring to FIG. 2 , there is a gap 9 between the diaphragm 3 and the upper cover 1 .

The miniature sound generator also includes a pole piece 5 attached to the magnetic steel 6 .

Coil lead wires (not labeled) are provided on the coil 4 , and welding pads (not labeled) are also provided on the frame 8 .

When the coil 4 is supplied with alternating current, the coil 4 will move in the magnetic gap due to the action of the magnetic field. As the current changes, this movement will also change accordingly, thereby driving the diaphragm 3 to vibrate up and down, resulting in the generation of sound .

Since the frame 8 is arranged between the lower cover plate 2 and the upper cover plate 1, the frame 8 includes a first plane 81 away from the lower cover plate, a second plane 82 close to the lower cover plate, and a first plane 82 passing through the first plane and the second plane. Two cavities 82, the vibrating membrane 3 is placed on the first plane 81, and there is a gap 9 between the vibrating membrane 3 and the upper cover plate 1, so the volume of the front cavity is increased.

What has been described above is only the embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, improvements can also be made without departing from the inventive concept of the utility model, but these all belong to Protection scope of the present utility model.

Claims (2)

1. minitype acoustic generator, it comprises the lower cover that is provided with first cavity, be embedded in the magnetic bowl in lower cover first cavity, be contained in the magnet steel in the magnetic bowl, be arranged on the framework on the lower cover, be contained in the coil in the magnetic gap that magnetic bowl and magnet steel form, be connected in the vibrating diaphragm of coil one end, be connected to form the upper cover plate of the receiving space that is used to accommodate said elements with lower cover, be arranged on the sound hole on the upper cover plate, it is characterized in that: framework is arranged between lower cover and the upper cover plate, framework comprises first plane away from lower cover, near second plane of lower cover and pass first plane and second cavity on second plane, vibrating diaphragm is placed on first plane, leaves the space between vibrating diaphragm and the upper cover plate.

2. minitype acoustic generator according to claim 1 is characterized in that: described minitype acoustic generator also comprises the pole piece that posts on described magnet steel.

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