CN201369816Y - Micro type sound generator - Google Patents

Abstract

The utility model provides a miniature sounder, which mainly includes a base, a magnetic bowl embedded in the base, a magnetic steel accommodated in the magnetic bowl, and a magnet partially accommodated in the magnetic gap formed by the magnetic bowl and the magnetic steel. A coil, a diaphragm connected to one end of the coil, an upper cover for accommodating the above-mentioned elements, the upper cover and the base together form a receiving cavity, the base includes an upper surface close to the upper cover, and the upper cover includes a lower surface close to the base On the surface, a number of welding ribs are arranged on the edge of the upper surface or the lower surface, because of the welding ribs, the base and the upper cover are not fully fitted. Since the welding rib is arranged between the base and the upper cover, when the base and the upper cover are welded together, the height of the miniature sounder can be adjusted through the welding rib to meet the height requirement of the miniature sounder.

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 adjacent to the upper cover, a voice coil connected with the diaphragm and suspended in the magnetic gap, A circuit board is arranged on the outside of the base to realize connection with the external circuit, and the incoming and outgoing lines 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.

However, after the overall height of the product is determined during the design of the microspeaker of this related structure, the base and the upper cover will be completely attached to each other. However, there are often bad problems that are close to the upper limit of the tolerance or exceed the upper limit of the tolerance. At this time, the actual total height of the product cannot be adjusted to meet the height requirements of the product.

Therefore, it is necessary to study a micro-speaker with a new structure.

Utility model content

The technical problem to be solved by the utility model is to provide a miniature sounder whose height can be adjusted.

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

A miniature sounder, which mainly includes a base, a magnetic bowl embedded in the base, a magnetic steel accommodated in the magnetic bowl, a coil partially accommodated in the magnetic gap formed by the magnetic bowl and the magnetic steel, and a coil connected to the coil The vibrating membrane at one end, the upper cover for accommodating the above-mentioned elements, the upper cover and the base jointly form a receiving cavity, the base includes an upper surface close to the upper cover, the upper cover includes a lower surface close to the base, and the upper surface Or the edge of the lower surface is provided with several welding ribs, because of the welding ribs, the base and the upper cover are not fully fitted.

Preferably, the welding ribs are stepped.

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

Preferably, the height of the gap is between 0.05-0.10 mm.

The beneficial effect of the utility model is that: since the welding rib is arranged between the base and the upper cover, when the base and the upper cover are welded together, the height of the miniature sounder can be adjusted through the welding rib to meet the requirement of the miniature sounder. High need.

Description of drawings

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

Fig. 2 is the three-dimensional exploded schematic view of the miniature sounder provided by the utility model;

Fig. 3 is a sectional view provided by the utility model;

Fig. 4 is an enlarged view of part A in Fig. 3 .

Detailed ways

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

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

Generally speaking, the miniature sound generator 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 adjacent to the upper cover, a voice coil connected with the diaphragm and suspended in the magnetic gap, A circuit board is arranged on the outside of the base to realize connection with the external circuit, and the incoming and outgoing lines 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, the voice coil is driven alternately in the magnetic gap to generate alternating motion, which drives the diaphragm to vibrate and produce sound.

Please refer to FIG. 2 , which shows a three-dimensional exploded view of the micro-speaker 1 of the present invention. The micro-speaker 1 includes a base 11, a magnetic bowl 12 embedded in the base 11, and a magnetic steel 13 accommodated in the magnetic bowl 12. , the pole piece 14 pasted on the magnetic steel 13, the coil 15 partially accommodated in the magnetic gap formed by the magnetic bowl 12 and the magnetic steel 13, the diaphragm 16 connected to one end of the coil 15, and the base 11 together form a housing The cavity and the upper cover 17 that accommodates the above-mentioned components therein. When an alternating current is passed into the coil 15, the coil 15 in the magnetic gap will move due to the action of the magnetic field. As the current changes, this movement will also change accordingly, thereby driving the diaphragm 16 to vibrate up and down , causing the sound to be produced.

3 and 4, the base 11 is provided with a stepped welding rib 111, due to the presence of the welding rib 111, there is a gap 117 between the base 11 and the upper cover 17, that is, the base 11 and the upper cover 17 does not fit perfectly. The height of the gap 117 is between 0.05-0.10 mm. In this way, when the base 11 and the upper cover 17 are welded together, the welding method can be ultrasonic welding, but not limited to ultrasonic welding. The total height of the product can be adjusted by adjusting the melting height of the welding rib 111. After the gap 117 is closed, it can also be adjusted. It can ensure that the height of the product tends to the central value and meet the needs of the product height. Certainly, the welding ribs 111 are not limited to be disposed on the base 11 , and may also be disposed on the upper cover 17 .

In order to obtain a miniature sounder whose height can be adjusted, the method adopted is: provide an upper cover and a base, set welding ribs on the upper cover or the base, form a storage cavity with the base and the upper cover, and assemble the upper cover and the base , Due to the welding ribs, there is a gap between the base and the upper cover, and the upper cover and the base are assembled by welding. When the base and the upper cover are welded together, the micro The overall height of the sounder.

In the present utility model, to obtain the miniature sounder with the gap 117 between the base 11 and the upper cover 17 as described above, the following method can be adopted: provide the required components of the miniature sounder 1, including the upper cover 17 And the base 11, the base 11 and the upper cover 17 form a housing cavity for placing other components, and the base 11 or the upper cover 17 are provided with welding ribs; when other components are assembled and placed in the housing cavity, due to welding The presence of ribs 111 leaves a gap 117 between the base 11 and the upper cover 17; when the base 11 and the upper cover 17 are welded together, the overall height of the miniature sounder 1 can be adjusted by controlling the welding ribs 111, To obtain the miniature sounder 1 whose height can be adjusted.

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 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 (4)

1. A miniature sounder, which mainly includes a base, a magnetic bowl embedded in the base, a magnetic steel accommodated in the magnetic bowl, a coil partially accommodated in the magnetic gap formed by the magnetic bowl and the magnetic steel, and a connection The diaphragm at one end of the coil, the upper cover for containing the above-mentioned elements, the upper cover and the base jointly form a storage cavity, and it is characterized in that: the base includes an upper surface close to the upper cover, and the upper cover includes an upper surface close to the base On the lower surface, several welding ribs are arranged on the edge of the upper surface or the lower surface, and the base and the upper cover are not fully fitted due to the welding ribs. 2. The miniature sound generator according to claim 1, wherein the welding rib is stepped. 3. The miniature sounder according to claim 1, characterized in that: the miniature sounder further comprises a pole piece attached to the magnetic steel. 4. The miniature sound generator according to claim 1 or 2, characterized in that: the height of the gap is between 0.05-0.10 mm.

Images