CN213462285U

CN213462285U - Miniature loudspeaker

Info

Publication number: CN213462285U
Application number: CN202022101432.5U
Authority: CN
Inventors: 林嘉平
Original assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Current assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2021-06-15
Anticipated expiration: 2030-09-22

Abstract

A micro loudspeaker comprises a frame, an annular washer and two first side magnetic steels; the pot frame is provided with air vents at two sides in the X-axis direction respectively; the annular washer is embedded in the basin frame and is pressed against the first edge magnetic steel; a first air inlet channel is formed between one side of the first edge magnetic steel, which faces the air vent, and the basin frame; a second air inlet channel is arranged between one side of the annular washer, which faces the air vent, and the basin frame; the second air inlet channel, the first air inlet channel and the air vent are communicated in sequence; the width of the first air intake passage in the X-axis direction is smaller than the width of the second air intake passage in the X-axis direction. The utility model discloses can reduce the air current resistance, improve the sensitivity of speaker.

Description

Miniature loudspeaker

Technical Field

The utility model belongs to the technical field of vocal music device and specifically relates to indicate a miniature speaker.

Background

Nowadays, with the development of light and thin electronic devices, micro speakers are also smaller and thinner. The sensitivity of the micro loudspeaker is ensured while the micro loudspeaker is smaller and thinner. At present, the effect of improving the sensitivity of the micro-speaker can be achieved by reducing the magnetic gap, that is: the sensitivity of the loudspeaker is ensured by reducing the distance between the voice coil and the washer or the magnetic steel.

However, although the method of reducing the magnetic gap can improve the sensitivity of the micro-speaker, the reduction of the magnetic gap increases the resistance of the air flow passing through the magnetic gap, which causes instability of the speaker during vibration and affects the acoustic performance of the speaker.

In the prior art, the annular washer is provided with the notch (10) for ventilation at four end positions corresponding to the voice coil, and the length of the first edge magnetic steel (20) is shortened, so that sufficient space is reserved between the edge magnetic steel (20) and the central magnetic steel (30) and between the edge magnetic steel and the annular washer (40) and the external space is used for ventilation, and the airflow resistance is reduced. However, the reduction of the length of the side magnetic steel (20) reduces the length of the magnetic gap with the center magnetic steel (30), and the reduction of the length of the magnetic gap greatly reduces the sensitivity of the micro-speaker, which is contradictory to the reduction of the magnetic gap and the increase of the sensitivity of the micro-speaker.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a micro-speaker is provided to improve the sensitivity of the micro-speaker.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a micro loudspeaker comprises a frame, an annular washer and two first side magnetic steels;

the pot frame is provided with air vents at two sides in the X-axis direction respectively;

the two first side magnetic steels are respectively arranged opposite to the corresponding air vents;

the annular washer is embedded in the basin frame and is pressed against the first edge magnetic steel;

a first air inlet channel is formed between one side of the first edge magnetic steel, which faces the air vent, and the basin frame;

a second air inlet channel is arranged between one side of the annular washer, which faces the air vent, and the basin frame;

the second air inlet channel, the first air inlet channel and the air vent are communicated in sequence;

the width of the first air intake passage in the X-axis direction is smaller than the width of the second air intake passage in the X-axis direction.

Furthermore, the device also comprises a diaphragm component and a voice coil;

the vibrating diaphragm component is arranged on the basin frame and is positioned above the annular washer;

the voice coil is arranged on the lower side of the vibrating diaphragm component and is positioned on one side of the first side magnetic steel, which is far away from the air vent;

a third air inlet channel is arranged between the voice coil and the first side magnetic steel;

the third air inlet channel extends to the position between the diaphragm assembly and the annular washer and is communicated with the first air inlet channel.

Furthermore, one side of the vent hole, which faces the first edge magnetic steel, is provided with damping mesh cloth.

Furthermore, the damping net cloth is embedded in the inner wall of the basin stand.

Further, the basin stand and the annular washer are integrally formed.

The beneficial effects of the utility model reside in that: the utility model discloses in because second inlet channel is greater than first inlet channel at the ascending width of X axle side at X axle side's width, on X axle side, increased the interval between annular china department and the basin frame promptly, enlarged the air admission clearance, increased the air output, reach the effect that reduces the air flow resistance. Compared with the prior art, need not to adjust the length of first edge magnet steel, consequently can not reduce micro loudspeaker's sensitivity, otherwise, the utility model discloses guaranteeing to reduce under the condition of micro loudspeaker sensitivity, having reduced the air current resistance, reached the effect that improves micro loudspeaker sensitivity.

Drawings

Fig. 1 is a schematic structural diagram of a micro-speaker in the prior art;

fig. 2 is a schematic structural diagram of a micro-speaker according to an embodiment of the present invention;

fig. 3 is an exploded view of a micro-speaker according to an embodiment of the present invention;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is a cross-sectional view taken along the line A-A in FIG. 2;

fig. 6 is a schematic view of a partial structure of a micro-speaker according to an embodiment of the present invention at a bottom view angle;

fig. 7 is a cross-sectional view of a micro-speaker according to an embodiment of the present invention.

Description of reference numerals:

1. a basin stand; 11. a vent; 12. damping mesh cloth;

2. a ring washer; 3. a central washer;

4. a magnetic circuit assembly; 41. a first edge magnetic steel; 42. second side magnetic steel; 43. central magnetic steel;

5. a first air intake passage; 6. a second intake passage; 7. a third air intake passage;

8. a diaphragm assembly; 81. a front cover; 82. a ball top; 83. an upper vibrating diaphragm; 84. a centering support; 85. a lower diaphragm;

9. a voice coil.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 2-7, a micro speaker includes a frame, a ring washer and two first side magnetic steels;

The utility model discloses a theory of operation lies in:

the width of the first air inlet channel in the X-axis direction is smaller than that of the second air inlet channel in the X-axis direction, namely, the air inflow can be increased and the air flow resistance is reduced by adjusting the width between the annular washer, the first edge magnetic steel and the basin frame, so that the effect of improving the sensitivity is achieved.

From the above description, the beneficial effects of the present invention are: the utility model discloses in because second inlet channel is greater than first inlet channel at the ascending width of X axle side at X axle side's width, on X axle side, increased the interval between annular china department and the basin frame promptly, enlarged the air admission clearance, increased the air output, reach the effect that reduces the air flow resistance. Compared with the prior art, need not to adjust the length of first edge magnet steel, consequently can not reduce micro loudspeaker's sensitivity, otherwise, the utility model discloses guaranteeing to reduce under the condition of micro loudspeaker sensitivity, having reduced the air current resistance, reached the effect that improves micro loudspeaker sensitivity.

Furthermore, the device also comprises a diaphragm component and a voice coil;

According to the above description, the third air inlet channel communicated with the first air inlet channel is formed between the voice coil and the diaphragm assembly and the annular washer, so that smooth air circulation inside the loudspeaker can be ensured in the vibration process of the voice coil.

Can know from the above-mentioned description, set up the nylon screen cloth, can carry out physics to the air and filter, avoid large particulate matter to be inhaled inside the speaker at the in-process of admitting air, and influence the acoustic performance of speaker.

According to the above description, the damping mesh cloth is embedded in the inner wall of the basin stand, so that the damping mesh cloth can be prevented from falling off, and the service life is prolonged.

Further, the basin stand and the annular washer are integrally formed.

As can be seen from the above description, the basin stand and the annular washer are integrally formed, so that the width of the first air inlet channel is ensured not to be easily changed.

The utility model is suitable for an electronic product that all kinds of thickness are little and require high to the loudness, like cell-phone, notebook computer, panel computer etc..

Example one

Referring to fig. 2-7, a micro speaker includes a frame 1, an annular washer 2, a central washer 3, two first side magnetic steels 41, two second side magnetic steels 42, and a central magnetic steel 43; two sides of the basin frame 1 in the X-axis direction are respectively provided with an air vent 11; the two first side magnetic steels 41 are respectively arranged opposite to the corresponding air vents 11; the annular washer 2 is embedded in the basin stand 1 and is pressed against the first side magnetic steel 41; a first air inlet channel 5 is arranged between one side of the first side magnetic steel 41 facing the air vent 11 and the basin frame 1; a second air inlet channel 6 is arranged between one side of the annular washer 2 facing the air vent 11 and the basin frame 1; the second air inlet channel 6, the first air inlet channel 5 and the air vent 11 are communicated in sequence; the width of the first air inlet channel 5 in the X-axis direction is smaller than the width of the second air inlet channel 6 in the X-axis direction, namely the width H of one side of the annular washer 2 in the X-axis direction₁Is smaller than the width H of the first side magnetic steel 41₂(ii) a Central flowerThe driver 3 is installed on the central magnetic steel 43, the two first side magnetic steels 41 are respectively arranged on two sides of the central magnetic steel 43 in the X-axis direction, the two second side magnetic steels 42 are respectively arranged on two sides of the central magnetic steel 43 in the Y-axis direction to form the magnetic circuit assembly 4, and the magnetic circuit assembly 4 is installed on the lower vibrating diaphragm 85. Preferably, the basin stand 1 and the annular washer 2 are integrally injection molded; two air vents 11 are respectively arranged at two sides of the basin frame 1 in the X-axis direction.

Example two

The difference between this embodiment and the first embodiment is that a diaphragm assembly 8 and a voice coil 9 are further included.

Referring to fig. 3 and 5, further comprising a diaphragm assembly 8 and a voice coil 9; the vibrating diaphragm component 8 is arranged on the basin frame 1, and the vibrating diaphragm component 8 is positioned above the annular washer 2; the voice coil 9 is arranged at the lower side of the vibrating diaphragm component 8, and the voice coil 9 is positioned at one side of the first side magnetic steel 41 far away from the vent 11; a third air inlet channel 7 is arranged between the voice coil 9 and the first side magnetic steel 41; the third air inlet passage 7 extends between the diaphragm assembly 8 and the annular washer 2 and communicates with the first air inlet passage 5. When the voice coil 9 vibrates upwards, the air vent 11 admits air, and when the voice coil 9 vibrates downwards, the air vent 11 gives out air, and the air path is formed by sequentially communicating the third air inlet channel 7, the second air inlet channel 6, the first air inlet channel 5 and the air vent 11. The voice coil 9 is covered outside the central magnetic steel 43, and the voice coil 9 is located between the central magnetic steel 43 and the first and second side

magnetic steels

41 and 42. The diaphragm assembly 8 comprises a ball top 82, an upper diaphragm 83 and a centering chip 84; the centering support piece 84 is embedded in the basin stand 1, the upper vibrating diaphragm 83 is arranged on the centering support piece 84, the ball top 82 is embedded in the top of the upper vibrating diaphragm 83, and the top of the upper vibrating diaphragm 83 is also provided with a hollow front cover 81.

Referring to fig. 5, a damping mesh cloth 12 is arranged on one side of the vent 11 facing the first side magnetic steel 41; the damping mesh cloth 12 covers one side of the two air vents 11 facing the first side magnetic steel 41 at the same time, and the damping mesh cloth 12 is embedded in the inner wall of the basin stand 1. Wherein, the damping net cloth 12 is embedded in the basin frame 1 in the injection molding process of the basin frame 1.

To sum up, the utility model provides a pair of miniature speaker, through changing the annular china department in X axle direction and the interval between the basin frame, perhaps reach the purpose that reduces the air resistance at the width of X axle direction through adjusting first edge magnet steel, need not to adjust the interval of first edge magnet steel and central magnet steel, ensure not influencing under the prerequisite of sensitivity, reduce the air resistance, reduce the polarization that sways of vibrating diaphragm subassembly, and then reduce the collision of vibrating diaphragm subassembly and other spare parts, further improved the sensitivity of speaker.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. A micro loudspeaker is characterized by comprising a frame, an annular washer and two first side magnetic steels;

2. The micro-speaker of claim 1, further comprising a diaphragm assembly and a voice coil;

3. The micro-speaker as claimed in claim 1, wherein a damping mesh is disposed on a side of the vent facing the first edge magnetic steel.

4. The micro-speaker as claimed in claim 3, wherein the damping mesh is embedded in the inner wall of the frame.

5. The micro-speaker as claimed in claim 1, wherein the frame is integrally formed with the annular washer.