阅读说明：本技术 能防止音圈碰撞的微型扬声器 (Micro loudspeaker capable of preventing voice coil collision ) 是由 李国基 于 2020-05-09 设计创作，主要内容包括：一种能防止音圈碰撞的微型扬声器,包含有一具有一容置空间的外壳、一安置在该容置空间内的振膜、一具有一轴心的磁铁、一环绕在该磁铁外部并与该振膜连接的音圈以及一连接在该音圈与该磁铁之间的弹性连接件,该容置空间具有彼此相对的第一端与该第二端,该振膜设在该第一端,该磁铁设在该第二端并与该振膜彼此相互间隔,且该音圈与该磁铁之间利用该弹性连接件保持一间距。当该音圈在馈入信号电压后,该振膜会沿该轴心的延伸方向产生一振膜运动,并通过该弹性连接件缩小沿该轴心产生偏摆的幅度,以防止该音圈与该磁铁产生碰撞。(The utility model provides a can prevent miniature speaker of voice coil loudspeaker voice coil collision, include a shell that has an accommodation space, a vibrating diaphragm of settling in this accommodation space, a magnet that has an axle center, a voice coil loudspeaker voice coil that encircles this magnet outside and be connected with this vibrating diaphragm and an elastic connection spare that connects between this voice coil loudspeaker voice coil and this magnet, this accommodation space has relative first end and this second end each other, this vibrating diaphragm is established at this first end, this magnet is established at this second end and is separated from each other with this vibrating diaphragm, and utilize this elastic connection spare to keep an interval between this voice coil loudspeaker voice coil and this magnet. When the voice coil is fed with signal voltage, the vibrating diaphragm can generate vibrating diaphragm motion along the extension direction of the axis, and the amplitude of deflection generated along the axis is reduced through the elastic connecting piece, so that the voice coil is prevented from colliding with the magnet.)

1. A micro speaker capable of preventing voice coil collision, at least comprising:

the shell is provided with an accommodating space in the center, and the accommodating space is provided with a first end and a second end which are opposite to each other;

a vibrating diaphragm, which is arranged at the first end of the accommodating space;

the magnet is provided with an axis which is vertical to the vibrating diaphragm, is arranged at the second end of the accommodating space and is mutually spaced from the vibrating diaphragm;

one end of the voice coil is annularly arranged on the outer side of the magnet, the other end of the voice coil is connected with the vibrating diaphragm, and the voice coil drives the vibrating diaphragm to generate amplitude motion along the extending direction of the axis after a signal voltage is fed in; and

an elastic connecting piece is connected between the magnets of the voice coil, so that a space is kept between the voice coil and the magnets, and the amplitude of deflection generated along the axis when the voice coil performs amplitude motion is reduced.

2. The micro-speaker as claimed in claim 1, wherein the elastic connection member further comprises at least one frame and at least one elastic member, the frame is used for carrying the voice coil, and the elastic member is connected between the frame and the magnet.

3. The micro-speaker as claimed in claim 2, wherein the frame further comprises a plurality of frames, each of the frames is spaced apart from each other, and the elastic member is disposed between each of the frames and the magnet.

4. A micro-speaker capable of preventing voice coil collision as claimed in claim 3, wherein each of the frames spaced apart from each other is further connected to each other by a connecting rod.

5. The micro-speaker of claim 3, wherein the magnet is substantially rectangular and comprises two opposite long sides and two opposite short sides, each of the long sides and each of the short sides are adjacent to each other and form an arc-shaped side.

6. The micro-speaker of claim 5, wherein each frame is disposed outside each of the curved sides, and each elastic member is connected between each frame and each curved side.

7. The micro-speaker as claimed in claim 5, wherein the two long sides and the two outer sides of the long sides are respectively provided with a frame, and a connector is respectively provided between each frame and each long side and each short side.

8. A micro-speaker for preventing voice coil collision as claimed in claim 1, wherein the magnet further has an adhesive layer on an outer surface thereof.

9. The micro-speaker of claim 1, wherein the housing further comprises a supporting base and a main housing, the first end is formed on the supporting base and is used for supporting the diaphragm, the second end is formed on the main housing and surrounds the voice coil, and the supporting base is mounted above the main housing.

10. The micro-speaker of claim 9, wherein the diaphragm is integrally formed with the carrier, and the diaphragm is formed directly on the carrier by injection molding using a silicone material.

Technical Field

The invention relates to a micro-speaker, in particular to a micro-speaker which can make sound after a signal voltage signal is fed in, can prevent collision sound and can reduce the volume.

Background

The micro speaker is mainly applied to mobile devices, earphones, speakers and other devices capable of making sound. The traditional micro loudspeaker mainly utilizes a voice coil arranged inside to surround the outside of a magnet, when the voice coil generates current after a signal voltage is fed in, and the voice coil cuts magnetic lines of force to generate acting force so as to drive a vibrating diaphragm to generate up-and-down amplitude motion, so that the vibrating diaphragm drives air to generate corresponding sound.

Because the volume of the micro-speaker is small, the space inside the micro-speaker is limited, so that the gap between the voice coil and the magnet is reduced, when the voice coil moves along the magnet with the amplitude up and down, the voice coil and the magnet are easy to collide, and fine collision sound is carried in the process of making sound of the micro-speaker.

Therefore, a structure and a method for solving the collision between the voice coil and the magnet have been proposed. Such as U.S. patent nos. 8995704, 9813818, 10003887, 10448167, 10299045, and the like.

The above patents mainly provide an elastic connecting member between the voice coil and a housing, so that a space is kept between the voice coil and the magnet through the elastic connecting member, and the voice coil is prevented from colliding with the magnet in the process of generating the up-and-down amplitude motion. Although this method can effectively improve the sound of collision between the voice coil and the magnet, it is necessary to maintain a large space between the voice coil and the housing to facilitate installation of the elastic connection member. Therefore, the volume of the micro-speaker is limited and cannot be developed toward a smaller volume.

Therefore, how to provide a micro speaker capable of preventing voice coil collision and effectively reducing the volume is the problem to be solved by the scheme.

Disclosure of Invention

The present invention is directed to a micro-speaker, and more particularly, to a micro-speaker capable of generating sound after being energized, preventing a collision sound from being generated, and reducing a volume of the micro-speaker.

To achieve the above objective, the present invention provides a micro-speaker capable of preventing voice coil collision, which at least comprises a housing, a diaphragm, a magnet, a voice coil and an elastic connecting member. The shell is provided with an accommodating space in the center, and the accommodating space is provided with a first end and a second end which are opposite to each other. The diaphragm is installed at the first end of the accommodating space. The magnet is provided with an axis, is arranged at the second end of the accommodating space and is mutually separated from the vibrating diaphragm. One end of the voice coil is annularly arranged on the outer side of the magnet, the other end of the voice coil is connected with the vibrating diaphragm, and the voice coil drives the vibrating diaphragm to generate amplitude motion along the extending direction of the axis after a signal voltage is fed in. The elastic connecting piece is connected between the magnets of the voice coil, so that a space is kept between the voice coil and the magnets, and the amplitude of deflection generated along the axis when the voice coil performs amplitude motion is reduced.

In one embodiment, the elastic connecting member further includes at least one frame for carrying the voice coil and at least one elastic member connected between the frame and the magnet.

In one embodiment, the frame further comprises a plurality of frames, each of the frames is spaced apart from each other, and the elastic member is disposed between each of the frames and the magnet.

In one embodiment, each of the frames spaced apart from each other is further connected to each other by a connecting rod.

In one embodiment, the magnet is substantially rectangular and includes two opposite long sides and two opposite short sides, and each long side and each short side are adjacent to each other and form an arc-shaped side.

Each frame is arranged on the outer side of each arc-shaped edge, and each elastic piece is connected between each frame and each arc-shaped edge.

In one embodiment, the frame is disposed on the outer sides of the two long sides and the two long sides, and the connecting member is disposed between each frame and each long side and each short side.

In one embodiment, the magnet further has an adhesion layer on the outer surface thereof.

In an embodiment, the casing further comprises a carrying seat and a main casing, the first end is formed on the carrying seat and used for carrying the diaphragm, the second end is formed on the main casing and surrounds the voice coil, and the carrying seat is mounted above the main casing.

In one embodiment, the diaphragm is integrally formed with the carrying seat, and the diaphragm is directly formed on the carrying seat by a silica gel material through injection molding.

Drawings

Fig. 1 is a schematic cross-sectional view of a micro-speaker according to the present invention.

FIG. 2 is a cross-sectional view of the magnet and the first embodiment of the elastic connecting member of the present invention

Fig. 3 is a schematic view of the combination of the first embodiment of the elastic connecting member and the magnet according to the present invention.

Fig. 4 is a top view of the magnet and the first embodiment of the elastic connecting member of the present invention.

Fig. 5 is a schematic diagram of the separation of the first embodiment of the elastic connecting member and the magnet according to the present invention.

FIG. 6 shows a second embodiment of the elastic connecting element according to the invention.

Fig. 7 is a schematic view of a combination of the magnet and the elastic connecting member according to a third embodiment of the present invention.

Fig. 8 is a schematic view of a combination of the magnet and the elastic connecting member according to a third embodiment of the present invention.

[ description of main reference symbols in the drawings ]

10 micro loudspeaker

20 outer casing

21 accommodating space

22 first end

23 second end

24 bearing seat

25 main casing

30 diaphragm

40 magnet

41 axle center

42 long side

43 short side

44 arc edge

45 adhesive layer

50 washer

60 Voice coil

Spacing of 61

70 elastic connecting piece

71 frame body

72. 72' elastic member

73. 73' frame

74 connecting edge

75 attaching edge

76 connecting rod

Detailed Description

The detailed description and technical contents of the present invention will now be described with reference to the accompanying drawings:

as shown in fig. 1 to 5, the present invention firstly provides a micro-speaker capable of preventing voice coil collision, in which the micro-speaker 10 includes a housing 20, a diaphragm 30, a magnet 40, a washer 50, a voice coil 60 and an elastic connecting member 70.

The housing 20 has a receiving space 21 at the center, the receiving space 21 has a first end 22 and a second end 23, and the first end 22 and the second end 23 are opposite to each other. In the present embodiment, the housing 20 is composed of a carrying seat 24 and a main housing 25, the first end 22 is located on the carrying seat 24, the second end 23 is located on the main housing 25, and the carrying seat 24 is installed above the main housing 25.

The diaphragm 30 is mounted at an end edge of the first end 22 of the accommodating space 21. In this embodiment, the diaphragm 30 is formed integrally with the bearing seat 24 by an injection molding method using a silica gel material, the molding method is to first place the bearing seat 24 into a first mold (not shown in the drawings, belonging to the prior art), and then inject the silica gel material in a liquid state into the first mold, after the silica gel material is cooled and molded in the first mold, the diaphragm 30 can be directly molded on the bearing seat 24, so that the diaphragm 30 and the bearing seat 24 are formed integrally.

The magnet 40 is installed at the second end 23 of the accommodating space 21 and is covered by the housing 20, the magnet 40 and the diaphragm 30 are spaced from each other, and the magnet 40 has an axis 41, and the axis 41 is perpendicular to the diaphragm 30. In the present embodiment, the magnet 40 is substantially rectangular and includes two long sides 42 and two short sides 43, each long side 42 and each short side 43 are adjacent to each other, and an arc-shaped side 44 is formed between each long side 42 and each short side 43. The washer 50 covers the magnet 40.

The voice coil 60 is also disposed in the accommodating space 21, one end of the voice coil 60 is connected to the diaphragm 30, and the other end of the voice coil 60 surrounds the magnet 40 and the washer 50, and a gap 61 is formed between the voice coil and the magnet 40 and the washer 50. The voice coil 60 is formed by winding a metal wire such as an enameled wire, a copper wire, an aluminum wire or a copper-clad aluminum wire, and two ends of the enameled wire are respectively used for connecting to an external power supply (for the prior art, not described herein). When a signal voltage is fed to the voice coil 60, a current is generated, and the voice coil 60 cuts magnetic lines of force to generate an acting force, so as to drive the diaphragm 30 to generate an amplitude motion along the extending direction of the axis 41, so that the diaphragm 30 drives the air to generate a corresponding sound.

The elastic connector 70 is connected between the magnet 40 and the voice coil 60, so that the proper distance 61 between the magnet 40 and the voice coil 60 is maintained through the elastic connector 70. The elastic connecting member 70 is composed of at least one frame 71 and at least one elastic member 72, in this embodiment, the frame 71 is composed of four frames 73, each frame 73 is disposed at an interval, each frame 73 is disposed adjacent to the outer side of each arc-shaped edge 44 of the magnet 40, and an elastic member 72 is disposed between each frame 73 and the arc-shaped edge 44. Each frame 73 is generally L-shaped (as shown in fig. 2), and includes a connecting edge 74 and a bonding edge 75, the connecting edge 74 is located below the voice coil 60, the bonding edge 75 is located outside the voice coil 60, and each frame 73 can be connected to the voice coil 60 by adhesion, high frequency, or injection molding. Each elastic member 72 is connected between the connecting edge 74 and the curved edge 44. In the present embodiment, the elastic member 72 is also formed between the connecting edge 74 and the arc-shaped edge 44 by injection molding using the silicone material, the molding method is to firstly place the frames 73 and the magnet 40 into a second mold (not shown in the drawings, which belongs to the prior art), and then inject the liquid silicone material into a molding space of the second mold, so that the elastic member 72 can be formed after the silicone material is cooled and molded in the molding space, thereby effectively combining the elastic member 72 between the connecting edge 74 and the arc-shaped edge 44, and the shape of the elastic member 72 can be changed by changing the shape in the molding space. In addition, since the magnet 40 and the elastic member 72 are made of different materials, in order to enable the elastic member 72 to be effectively combined with the magnet 40 during the molding process, in the embodiment, an adhesion layer 45 is formed on the outer surface of the magnet 40 by coating or injection molding, and the adhesion layer 45 is also formed by using the silicone material, so that when the elastic member 72 is molded, the elastic member 72 and the adhesion layer 45 can be effectively combined with each other, thereby increasing the adhesion force between the elastic member 72 and the magnet 40.

Therefore, when the voice coil 60 performs the amplitude motion on the magnet 30 after the signal voltage is fed to the voice coil 60, the elastic connection member 70 can keep the distance 61 between the voice coil 60 and the magnet 40, so as to reduce the phenomenon that the voice coil 60 swings left and right in the extending direction of the axis 41, and further effectively avoid the collision between the voice coil 60 and the magnet 40.

It is worth mentioning that, as the radius of each of the arc-shaped sides 44 of the magnet 40 is larger, the distance 61 between each of the arc-shaped sides 44 and the frame 73 is larger, so that the area of the connecting member 72 is relatively larger. Therefore, in the present invention, the distance 61 between the arc-shaped edge 44 and the frame 73 can be controlled by controlling the radius of the arc-shaped edge 44, so as to effectively change the shape of the elastic element 72 according to the amplitude of the motion, and effectively maintain the distance 61 between the voice coil 60 and the magnet 40. At the same time, the distance between the housing 20 and the voice coil 60 can be reduced, so that the volume of the entire micro-speaker 10 can be effectively reduced.

As shown in fig. 4 and 6, in order to save the molding time of the elastic members 72 between the frames 73 and the magnet 40, in the embodiment, a connecting rod 76 is mainly disposed between each of the frames 73 spaced apart from each other, and two ends of each connecting rod 76 are respectively connected to one of the frames 73. Therefore, when the frames 73 are placed in the second mold, the frames 73 can be placed in the second mold at the same time without placing each frame 73 in the second mold one by one, thereby shortening the time for placing the frames 73 in the second mold. After each elastic member 72 is molded, each connecting rod 76 can be selectively retained between two frames 73, or the connecting rods 76 can be removed from between the frames (as shown in fig. 4) to reduce the weight of the frame 71.

Finally, as shown in fig. 1, fig. 7 and fig. 8, in the present embodiment, the frames 73 ' are respectively disposed outside the two long sides 42 and the two short sides 43 of the magnet 40, and each frame 73 ', each long side 42 and each short side 43 are connected to each other by an elastic member 72 '. Therefore, when the voice coil 60 performs the amplitude motion outside the magnet 40, the elastic members 72' can maintain the distance 61 between the voice coil 60 and the magnet 40 without collision, so as to effectively improve the sound generated by the collision between the voice coil 60 and the magnet 40.

In summary, as shown in fig. 1 to 8, in the present invention, the elastic connection member 70 is mainly disposed between the voice coil 60 and the magnet 40, and whether the frames 73, 73 'and the elastic members 72, 72' are disposed outside the arc-shaped sides 44 of the magnet 40, or outside the two long sides 42 or the two short sides 43 of the magnet 40, the voice coil 60 and the magnet 40 can effectively maintain the distance therebetween, so that the voice coil 60 and the magnet 40 can effectively avoid collision when the voice coil 60 performs the amplitude motion outside the magnet 40. Meanwhile, the distance between the voice coil 60 and the housing 20 can be reduced, so that the volume of the entire micro-speaker 10 can be effectively reduced, and the requirement of further miniaturization can be met.

In conclusion, the present invention has been made to meet the requirements of the patent application, and the patent application is made in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby. All modifications and variations that may occur to those skilled in the art to which the invention pertains are deemed to lie within the scope and spirit of the invention as defined by the appended claims.