WO2016141727A1

WO2016141727A1 - Loudspeaker device

Info

Publication number: WO2016141727A1
Application number: PCT/CN2015/094529
Authority: WO
Inventors: 赵国栋; 何超锋; 穆瑞祥
Original assignee: 歌尔声学股份有限公司
Priority date: 2015-03-11
Filing date: 2015-11-13
Publication date: 2016-09-15
Also published as: CN104735595A

Abstract

Disclosed is a loudspeaker device, which comprises an auxiliary system, a magnetic circuit system and a vibrating system, wherein the magnetic circuit system and the vibrating system are accommodated and fixed in the auxiliary system; the vibrating system comprises a vibrating film, a centring support sheet and a voice coil combined together; the centring support sheet comprises a first fixing part, a second fixing part and a connection arm connecting the first fixing part and the second fixing part; the voice coil is rectangular, and four corners of the rectangular voice coil are provided being circular arc-shaped; in addition, the connection arm comprises an extension part extending from the second fixing part; the extension part extends from the position of the second fixing part corresponding to a circular arc-shaped corner of the voice coil; and the extension part is designed in a circular arc shape, and the circular arc of the extension part and the circular arc of the corner of the voice coil are concentric circles. The loudspeaker of the present invention has the advantages of a good acoustic performance, being beneficial to a high-power design, and a long service life.

Description

Speaker device

Technical field

The invention relates to the field of electroacoustics, in particular to a speaker device with good acoustic performance, high power design and long service life.

Background technique

With the expansion of the consumer electronics market, a large number of consumer electronic products such as mobile phones and notebook computers have been widely used. As an important acoustic component in consumer electronic products, speaker devices have a wide range of needs. With the increasing demand for consumer electronic products, the performance of speaker devices has also received more and more attention.

The speaker device comprises: an auxiliary system, a magnetic circuit system and a vibration system; the magnetic circuit system is provided with a magnetic gap; the vibration system comprises a diaphragm, a centering piece and a voice coil combined with the diaphragm, and the voice coil is disposed on the magnetic Within the gap; the change of current in the voice coil disposed in the magnetic gap causes the voice coil to vibrate by the magnetic field force, which drives the diaphragm to vibrate and sound. a conventional speaker device, the centering piece includes a first fixing portion and a second fixing portion, the first fixing portion is fixed to the auxiliary system, the second fixing portion is coupled with the voice coil, and the first fixing portion and the second fixing portion are connected The arm is connected in one piece. The centering piece of the conventional structure, the connecting arm of the second fixing portion and the first fixing portion is extended from the second fixing portion and connected to the first fixing portion, and the connecting arm directly extends from the second fixing portion, in the speaker diaphragm During the vibration process, the connecting arm has a small amplitude, which easily rubs against the diaphragm, causes the speaker device to generate noise, reduces the acoustic performance of the speaker device, and limits the high-power design of the speaker device. At the same time, the connecting arm rubs against the diaphragm and is easily destroyed. Diaphragm to reduce the life of the speaker unit.

Therefore, it is necessary to propose an improvement to overcome the drawbacks of the conventional structure speaker device.

Summary of the invention

The technical problem to be solved by the present invention is to provide a good acoustic performance and high power. Designed for long life speaker units.

In order to achieve the above object, the present invention adopts the following technical solutions:

A speaker device includes an auxiliary system, a magnetic circuit system and a vibration system, and the magnetic circuit system and the vibration system are housed and fixed in the auxiliary system; the vibration system includes a diaphragm and a centering branch combined a center piece and a voice coil; the centering piece includes a first fixing portion, a second fixing portion, and a connecting arm connecting the first fixing portion and the second fixing portion, the first fixing portion and the auxiliary The system is fixed; the voice coil is rectangular, the four corners of the rectangular voice coil are arranged in a circular arc shape; and: the connecting arm includes an extension extending from the second fixing portion; the extension portion The second fixing portion extends at a position corresponding to the arcuate arc-shaped corner portion; the extending portion has a circular arc design, and the extending portion arc coincides with a center of the voice coil corner portion arc.

As a preferred technical solution, the second fixing portion has a rectangular shape, and the connecting arm extends along a long axis and/or a short axis of the rectangular second fixing portion.

As a preferred technical solution, the centering piece is further provided with a pad portion, and the pad portion is electrically connected to the voice coil.

In a further preferred embodiment, the first fixing portion and the second fixing portion are both rectangular ring structures, and the pad portion is disposed at an inner side of the second fixing portion away from the first fixing portion, The pad portion includes two pads corresponding to two straight sides of the rectangular second fixing portion. In this case, the second fixing portion is a rectangle, and the two pads are correspondingly disposed on two long axis sides of the second fixing portion.

As another further preferred solution, the magnetic circuit system includes a magnet and a magnetic conductive plate, the magnetic conductive plate is fixed to a side of the magnet near the centering piece, and the magnetic conductive plate corresponds to the welding The disc portion is provided with a recess.

As a preferred technical solution, the auxiliary system includes a casing and a front cover, and the casing is provided with a positioning step, and the first fixing portion is fixed to the positioning step. On the basis of the above, the magnetic circuit system includes a magnetic conductive plate, a magnet and a magnetic yoke; the outer casing is provided with an opening at one end of the centering piece, and the magnetic yoke is disposed in the opening; Shell The outer side surface is flush with the outer side surface of the yoke.

In the speaker device of the present invention, the first fixing portion and the second fixing portion of the centering piece are integrally connected by a connecting arm, and the connecting arm extends from the position of the second fixing portion corresponding to the arc-shaped corner portion of the voice coil through the extending portion, and the extending portion In the shape of a circular arc, the arc-shaped extension has an arc that coincides with the center of the arc of the voice coil corner, that is, the two arcs are concentric circles. The arc-shaped extension effectively lengthens the length of the connecting arm, so that the speaker device vibration system obtains greater compliance, thereby improving the low-frequency performance of the speaker. At the same time, the arc-shaped extension lengthens the length of the connecting arm to avoid the vibration of the vibrating diaphragm and the connecting arm when the vibration system vibrates, avoiding the noise generated thereby, improving the acoustic performance of the speaker device, and ensuring the power of the speaker device. When the diaphragm is large, it does not rub against the connecting arm, which is beneficial to the high-power design of the speaker device; the connecting arm does not rub against the diaphragm, avoiding damage to the diaphragm by the connecting arm and prolonging the service life of the speaker. Therefore, the speaker device of the present invention has the advantages of good acoustic performance, high power design, and long service life.

Since the second fixing portion has a rectangular structure, the connecting arm extends along a second fixed major axis and/or a short axis direction of the rectangular structure, that is, the connecting arm is disposed on at least one corresponding one of the rectangular second connecting portions, and is connected The arm includes at least two; when the connecting arm is set to two, the two connecting arms extend corresponding to the two long axis sides or the two short axis sides of the second fixing portion, and when the connecting arm is four, the four connecting arms are The shaft edge of the second fixing portion extends. The centering piece of the structure can ensure the vibration balance of the diaphragm, is not easy to generate polarization, and is beneficial to improve the acoustic performance of the speaker device.

The centering piece is provided with a pad portion, and the centering piece is electrically connected to the voice coil, which simplifies the circuit design of the speaker device. The first fixing portion and the second fixing portion are both annular structures, which reduce the weight of the centering piece, thereby reducing the weight of the vibration system and improving the acoustic performance of the speaker device. In order to reduce the occupation of the internal space of the speaker device by the pad portion, the pad portion is disposed on the inner side of the second fixing portion away from the first fixing portion, the pad portion includes two pads, and the two pads are correspondingly disposed on the rectangular second fixed The two straight sides of the part. When the second fixing portion is rectangular, the two pads are disposed on the two long axis sides of the second fixing portion, which can reduce the centering piece Processing difficulty. After the voice coil is electrically connected to the pad, in order to avoid the bump position between the voice coil and the magnetic circuit system, the magnetic circuit system magnetic plate is provided with a recess corresponding to the pad portion, which increases without affecting the magnetic circuit system. Vibration space for improved acoustic performance.

Since the auxiliary system includes a casing and a front cover, the casing is provided with a positioning step, and the first fixing portion of the centering piece is fixed on the positioning step, thereby improving the firmness of fixing the centering piece and the auxiliary system, improving the reliability and use of the speaker device. life. The magnetic circuit system comprises a magnetic conductive plate, a magnet and a magnetic yoke. The outer casing is provided with an opening at one end away from the centering piece, and the guiding yoke is disposed in the opening, and the outer side surface of the outer casing is flush with the outer side surface of the guiding yoke to maximize the magnetic The volume of the road system increases the acoustic performance of the speaker unit.

In summary, the speaker device of the present invention has the advantages of good acoustic performance, high power design, and long service life.

DRAWINGS

1 is an exploded view of a specific embodiment of a speaker device of the present invention;

Figure 2 is a cross-sectional view of the speaker device of Figure 1;

3 is a schematic structural view of a centering piece of a speaker device according to an embodiment of the present invention;

4 is a schematic view showing the combination of the centering piece and the voice coil shown in FIG. 3.

detailed description

The content of the present invention will be described in detail below with reference to the accompanying drawings:

As shown in FIG. 1 and FIG. 2, a specific embodiment of the speaker device of the present invention, the speaker device of the embodiment has a rectangular structure, and includes an auxiliary system, the auxiliary system includes a front cover 11 and a casing 12; The front cover 11 and the outer casing 12 form a cavity in which the magnetic circuit system and the vibration system are housed, and the magnetic circuit system includes a center magnet 51 and an edge magnet 61, and a magnetic field that fixes the center magnet 51 and the side magnet 61 and functions as a magnetic conductive force. The yoke 7 is provided with a central magnetic conductive plate 52 on a side of the central magnet 51 adjacent to the front cover 11. The side of the side magnet 61 adjacent to the front cover 11 is provided with a side washer 62, a central magnet 51, a center washer 52 and a side. The magnet 61 and the edge washer 62 form a magnetic gap; the vibration system includes a composite layer 22 to which the diaphragm 21 is fixed to the diaphragm 21, a centering piece 3 fixed to the diaphragm 21, and a voice coil 4, and the voice coil 4 is disposed on the magnetic body Within the gap. In the speaker device of the present invention, the external circuit electronic signal enters the voice coil 4, and the internal current of the voice coil 4 disposed in the magnetic gap changes to generate a magnetic field force, and the voice coil 4 vibrates to vibrate the diaphragm 21 to sound.

As shown in FIG. 3, the centering piece 3 includes a first fixing portion 31, and a second fixing portion 32. The first fixing portion 31 and the second fixing portion 32 are integrally connected by a connecting arm 33, and the connecting arm 33 passes through the extending portion 331. The second fixing portion 32 is extended. The first fixing portion 31 of the centering piece 3 is fixed to the auxiliary system, and as shown in FIG. 4, the second fixing portion 32 is fixed to the voice coil 4. The voice coil 4 has a rectangular structure, and the four corners of the voice coil 4 of the rectangular structure are arc-shaped. . As shown in FIG. 3 and FIG. 4, the extending portion 331 is a circular arc design, and the extending portion 331 of the arc design extends from the position of the second fixed portion 32 corresponding to the arcuate corner portion of the voice coil 4, as shown in FIG. The arc of the portion 331 coincides with the center of the corresponding arc of the voice coil 4, that is, the two arcs are concentric circles. In the speaker device of the embodiment, the second fixing portion 32 is fixedly coupled with the voice coil 4. In practical applications, the second fixing portion 32 may not be fixedly coupled with the voice coil 4, and does not affect the advantages of the speaker device of the present invention. The arcuately designed extension 331 effectively increases the overall length of the connecting arm 33, so that the speaker device vibration system obtains greater compliance, thereby improving the low frequency characteristics of the speaker. At the same time, the arc-shaped extending portion 331 lengthens the length of the connecting arm 33, avoiding the friction between the diaphragm and the connecting arm 33 during the vibration of the diaphragm, thereby generating noise, improving the acoustic performance of the speaker device, and ensuring the speaker power. When the diaphragm is large, the diaphragm does not rub against the connecting arm 33, which is beneficial to the high power design of the speaker device; the connecting arm 33 does not rub against the diaphragm, and the damage of the diaphragm by the connecting arm 33 is avoided, and the use of the speaker device is prolonged. life. Therefore, the speaker device of the present invention has the advantages of good acoustic performance, high power design, and long service life.

As shown in FIG. 3 and FIG. 4, in the speaker device of the present embodiment, the second fixing portion 32 has a rectangular structure, and the connecting arm 33 extends along the four axial sides of the second fixing portion 32 of the rectangular structure. In practical applications, the connecting arm 33 is provided. According to the actual product requirements, along the second fixing portion 32 Two long axis sides or two short axis sides extend. When the connecting arm 33 is two, the two connecting arms 33 extend corresponding to the two long axis sides or the two short axis sides of the second fixing portion 32; when the connecting arm 33 is four, the four connecting arms 33 are along the second The shaft edge of the fixing portion 32 extends. The centering piece of the structure can ensure the vibration balance of the diaphragm, and is not easy to generate polarization, which is beneficial to the centering action of the centering piece 3 on the diaphragm, and improves the vibration adjustment of the centering piece 3 to the vibration system of the speaker device, which is beneficial to Improve the acoustic performance of the speaker unit.

As shown in FIGS. 3 and 4, the centering piece 3 further includes a land portion 34, and the land portion 34 is electrically connected to the voice coil 4. The centering piece 3 is provided with a land portion 34, which simplifies the circuit design of the speaker device, and the centering piece 3 is integrally coupled with the speaker circuit board. As shown in FIG. 1, the speaker device comprises an electrical connector 8, the electrical connector 8 is electrically connected to the centering segment 3, the electrical connector 8 does not have to be directly electrically connected to the voice coil 4, and the speaker device does not have to be soldered to the voice coil 4 lead when assembled. With the electrical connector 8, the assembly difficulty of the speaker device is reduced. As shown in FIG. 3 and FIG. 4, the first fixing portion 31 and the second fixing portion 32 of the centering piece are both annular structures, and the first fixing portion 31 and the second fixing portion 32 of the annular structure reduce the centering piece. The weight, which reduces the quality of the vibration system, helps to improve the acoustic performance of the speaker device. The pad portion 34 includes two pads, the two pads are disposed on the inner side of the second fixing portion 32 away from the first fixing portion 31, and the two pads are disposed on the two right-angle sides of the rectangular second fixing portion 32, This design makes full use of the internal space of the speaker device and reduces the occupation of the vibration space of the speaker device by the pad portion. As shown in the drawing, in the speaker device of the embodiment, the second fixing portion 32 has a rectangular structure, and the two pads are correspondingly disposed on the two long-axis sides, and the operation of increasing the soldering of the pad and the voice coil 4 is performed. Space is conducive to improving product yield and reducing assembly difficulty.

As shown in FIG. 1 and FIG. 2, in order to prevent the pad portion 34 from vibrating up and down with the center magnetic conductive plate 52 during the operation of the speaker, the center magnetic conductive plate 52 is provided with a recess 522 corresponding to the position of the pad portion 34, and the recess 522 is The pad portion 34 is avoided without affecting the magnetic circuit system, the vibration space of the vibration system is increased, the noise is prevented from being rubbed, and the acoustic performance of the speaker device is improved.

As shown in FIG. 2, a positioning step 121 is disposed inside the outer casing 12, and the centering piece 3 is provided. A fixing portion 31 is fixed to the positioning step 121 to improve the bonding strength of the centering piece and the outer casing 12, thereby improving the reliability and the service life of the speaker device. As shown in FIG. 2, an opening is provided at one end of the outer casing 12 away from the front cover 11, and a yoke 7 is disposed in the opening, and an outer surface of the yoke 7 is flush with an outer surface of the outer casing 12. This design maximizes The internal space of the speaker device housing is utilized to increase the volume of the magnetic circuit system of the speaker device, thereby improving the acoustic performance of the speaker device.

The above is only the embodiment of the present invention, and is not intended to limit the present invention, and equivalent modifications or variations made by those skilled in the art in light of the present invention are included in the scope of the claims.

Claims

A speaker device includes an auxiliary system, a magnetic circuit system and a vibration system, and the magnetic circuit system and the vibration system are housed and fixed in the auxiliary system; the vibration system includes a diaphragm and a centering branch combined a center piece and a voice coil; the centering piece includes a first fixing portion, a second fixing portion, and a connecting arm connecting the first fixing portion and the second fixing portion, the first fixing portion and the auxiliary The system is fixed; the voice coil is rectangular, and the four corners of the rectangular voice coil are arranged in a circular arc shape; wherein the connecting arm includes an extending portion extending from the second fixing portion; The extending portion extends from a position corresponding to the circular arc-shaped corner portion of the voice coil; the extending portion has a circular arc design, and the arc of the extending portion coincides with a center of the arc of the corner portion of the voice coil .
The speaker device according to claim 1, wherein said second fixing portion has a rectangular shape, and said connecting arm extends along a long axis and/or a short axis of said rectangular second fixing portion.
The speaker device according to claim 1, wherein said centering piece is further provided with a pad portion, and said pad portion is electrically connected to said voice coil.
The speaker device according to claim 3, wherein the first fixing portion and the second fixing portion are both rectangular ring structures, and the pad portion is disposed at the second fixing portion away from the first portion An inner side of a fixing portion, the pad portion includes two pads, and the two pads are correspondingly disposed on two straight sides of the rectangular second fixing portion.
The speaker device according to claim 4, wherein the second fixing portion has a rectangular shape, and the two pads are disposed corresponding to the two long axis sides of the second fixing portion.
The speaker device according to any one of claims 3 to 5, wherein the magnetic circuit system comprises a magnet and a magnetic conductive plate, and the magnetic conductive plate is fixed to the magnet adjacent to the centering piece On the side, the magnetic conductive plate is provided with a recess corresponding to the pad portion.
A speaker device according to claim 1, wherein said auxiliary system comprises a casing and a front cover, said casing being provided with a positioning step, and said first fixing portion is fixed to said positioning step.
The speaker device according to claim 7, wherein the magnetic circuit system comprises a magnetic conductive plate, a magnet and a magnetic yoke; the outer casing is provided with an opening at one end away from the centering piece, and the magnetic yoke And disposed in the opening; the outer side surface of the outer casing is flush with the outer side surface of the yoke.