CN211792029U - Novel flexible line way board of speaker - Google Patents

Abstract

The utility model relates to the technical field of a loudspeaker, in particular to a novel flexible circuit board of a loudspeaker, which comprises a flexible circuit board for elastically supporting a vibration system of the loudspeaker and independent small diaphragms arranged at long shaft deformation parts of the flexible circuit board, wherein the flexible circuit board comprises an inner fixing part, an outer fixing part and two deformation parts, the two deformation parts are respectively arranged between corresponding adjacent short shafts of the inner fixing part and the outer fixing part, the deformation parts are arranged in an S shape, the S-shaped end of the deformation parts is connected with the short shaft end side of the outer fixing part, the S-shaped other end of the deformation parts is connected with the short shaft end side of the inner fixing part, inner pads are respectively arranged at the long shaft end sides of the two long shaft ends of the inner fixing part facing the outer fixing part, two outer pads are respectively arranged on the outer fixing part, and two independent small diaphragms are respectively arranged at the two long shaft end sides of the outer fixing part, the utility model provides high stability, reliability and the acoustic performance of speaker.

Description

Novel flexible line way board of speaker

Technical Field

The utility model relates to a speaker technical field, concrete field is a novel flexible line way board of speaker.

Background

The miniature electroacoustic device is widely applied to portable electronic equipment such as mobile phones, notebook computers and the like. With the rapid development of these portable electronic devices, there is an increasing demand for miniature electro-acoustic devices to be used therein. The fixed chip support is used as a first transmission element of the miniature sound production device, and when the electronic equipment works, the fixed chip support influences the performance of the whole miniature electroacoustic device;

the traditional micro-acoustic device is not provided with a fixed core supporting chip generally, and only a vibrating diaphragm and a voice coil form a vibrating system; ideally, the voice coil should vibrate repeatedly at a preset position, but in actual work, the voice coil deviates from the preset position in the vibration process, the magnetic field intensity passing through the voice coil changes after deviating from the preset position, and the deviation of the position is difficult to monitor, namely cannot be corrected, so that the vibration of the voice coil is unstable, and further the vibration of the vibrating diaphragm is unstable; in addition, the traditional voice coil is provided with two leads, namely an incoming line and an outgoing line, the incoming line and the outgoing line are arranged in a suspended mode and are electrically connected with the shell, and in the process of up-and-down vibration of the voice coil, the leads easily generate pulling force on a vibration system to cause a polarization phenomenon; both of the above two cases will have a great influence on the overall acoustic performance of the electroacoustic device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel flexible line way board of speaker to solve among the prior art problem that the holistic acoustic performance of voice coil loudspeaker voice coil vibration in-process electroacoustic device caused great influence.

In order to achieve the above object, the utility model provides a following technical scheme: a novel flexible circuit board of a loudspeaker comprises a flexible circuit board for elastically supporting a vibration system of the loudspeaker and an independent small diaphragm arranged at a long shaft deformation part of the flexible circuit board, wherein the flexible circuit board comprises an inner fixing part, an outer fixing part and two deformation parts, the inner fixing part and the outer fixing part are designed into rectangular frames, the outer fixing part is sleeved at the outer side of the inner fixing part, the two deformation parts are respectively arranged between corresponding adjacent short shafts of the inner fixing part and the outer fixing part, the deformation parts are arranged in an S shape, the S-shaped end of the deformation parts is connected with the short shaft end side of the outer fixing part, the S-shaped other end of the deformation parts is connected with the short shaft end side of the inner fixing part, inner bonding pads are respectively arranged at the two long shaft ends of the inner fixing part facing the outer fixing part, two outer bonding pads are respectively arranged on the outer fixing part, and circuit board leads are arranged on, the two inner welding discs are electrically connected with the two outer welding discs in a one-to-one correspondence mode, the voice coil incoming line and the outgoing line of the loudspeaker are electrically connected with the corresponding inner welding discs respectively, the two independent small diaphragms are arranged, and the two independent small diaphragms are arranged on the two long shaft end sides of the outer fixing portion respectively.

Preferably, the cross section of the independent small membrane is S-shaped.

Preferably, the thickness of the independent small membrane is 0.03-0.1 mm.

Preferably, the independent small membrane is made of double-layer or multi-layer composite polyether-ether-ketone.

Preferably, two inner welding discs are arranged on the inner fixing part in point symmetry.

Preferably, the two outer pads are respectively arranged at the junction of the long axis and the short axis of the outer fixing part.

Compared with the prior art, the beneficial effects of the utility model are that: through the arrangement of the elastic flexible circuit board and the corresponding independent small diaphragm, the vibration effect of the voice coil of the loudspeaker can be improved, and the overall acoustic performance of the loudspeaker is improved;

through the arrangement of the deformation part, the two lead ends of the voice coil can move up and down along with the vibration system, and the dragging force of the lead on the vibration system is effectively eliminated;

through two independent little diaphragms respectively in flexible line way board major axis deformation portion setting, replace the "splice bar" design of conventional flexible line way board deformation portion, little diaphragm has higher compliance, has bigger deformation upper limit, consequently vibrates more easily under the same drive power, has bigger loudness. Meanwhile, the defect that the connecting ribs of the flexible circuit board horizontally rotate under large amplitude due to small deformation can be relieved to a certain extent, so that the polarization condition is avoided, and the overall acoustic performance of the loudspeaker is improved.

Drawings

Fig. 1 is an exploded view of a combined structure of a flexible printed circuit board in a speaker according to the present invention;

FIG. 2 is a view showing the structure of a voice coil in FIG. 1;

fig. 3 is a schematic structural diagram of the flexible printed circuit of the present invention;

FIG. 4 is a schematic structural view of the small independent diaphragm of the present invention;

fig. 5 is a schematic view of a combined structure of the flexible printed circuit board in the speaker according to the present invention.

In the figure: 1. a main frame; 21. central magnetic steel; 22. edge magnetic steel; 3. a central magnetic conductive sheet; 4. a magnetic shield; 51. a ball top; 52. an independent small membrane; 52a, a diaphragm inner fixing portion; 52b, a membrane outer fixing part; 53. a large membrane; 6. a voice coil; 61. entering a line; 62. wire outgoing; 7. a flexible circuit board; 71. an inner fixing portion; 711. an inner pad; 72. an outer fixing portion; 721. an outer pad; 73. a deformation portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution: a novel flexible circuit board of a loudspeaker comprises a flexible circuit board for elastically supporting a vibration system of the loudspeaker and an independent small diaphragm arranged at a long shaft deformation part of the flexible circuit board, wherein the flexible circuit board comprises an inner fixing part, an outer fixing part and two deformation parts, the inner fixing part and the outer fixing part are designed into rectangular frames, the outer fixing part is sleeved at the outer side of the inner fixing part, the two deformation parts are respectively arranged between corresponding adjacent short shafts of the inner fixing part and the outer fixing part, the deformation parts are arranged in an S shape, the S-shaped end of the deformation parts is connected with the short shaft end side of the outer fixing part, the S-shaped other end of the deformation parts is connected with the short shaft end side of the inner fixing part, inner bonding pads are respectively arranged at the two long shaft ends of the inner fixing part facing the outer fixing part, two outer bonding pads are respectively arranged on the outer fixing part, and circuit board leads are arranged on, the two inner welding discs are electrically connected with the two outer welding discs in a one-to-one correspondence mode, the voice coil incoming line and the outgoing line of the loudspeaker are electrically connected with the corresponding inner welding discs respectively, the two independent small diaphragms are arranged, and the two independent small diaphragms are arranged on the two long shaft end sides of the outer fixing portion respectively.

The section of the independent small diaphragm is arranged in an S shape.

The thickness of the independent small membrane is 0.03-0.1 mm.

The independent small membrane is made of double-layer or multi-layer composite polyether-ether-ketone.

Two the inner welding discs are arranged on the inner fixing part in point symmetry.

The two outer welding discs are respectively arranged at the junction of the long shaft and the short shaft of the outer fixing part.

According to the technical scheme, the voice coil is provided with an incoming line and an outgoing line, the incoming line and the outgoing line are arranged on the long edge of the voice coil assembly and led out to the outer side of the voice coil, the incoming line and the outgoing line of the voice coil are arranged in point symmetry at the center of the voice coil assembly, the incoming line and the outgoing line of the voice coil are electrically connected with the two inner welding discs respectively, in the specific design process, the incoming line and the outgoing line are arranged eccentrically corresponding to the center of the long edge of the voice coil assembly, and the incoming line is located on the side close to the welding; the outgoing line is positioned on the side far away from the welding disc of the outer fixing part;

the voice coil is adhered to the inner fixing part of the flexible circuit board through glue, and the outer fixing part of the flexible circuit board is connected with the main frame through the independent small diaphragm; the independent small diaphragms are arranged at the long shaft deformation part of the flexible circuit board, and the two independent small diaphragms are symmetrically arranged corresponding to the center of the flexible circuit board;

the technical scheme of the utility model introduces the flexible circuit board to support the whole vibration system by elasticity, the outer side of the flexible circuit board is electrically connected with the shell, the inner side of the flexible circuit board is electrically connected with each lead wire of the voice coil assembly, and the inner side of the flexible circuit board can move along with the vibration system so as to effectively eliminate the dragging force of the lead wires on the vibration system and avoid the polarization condition of the voice coil assembly, therefore, the technical scheme of the utility model can effectively improve the overall acoustic performance of the loudspeaker;

specifically, in the structural combination of the speaker, referring to fig. 1 to 5, the speaker includes a vibration system and a flexible printed circuit board 7 for elastically supporting the vibration system, the vibration system includes a voice coil 6 and an integrated tensile ball-top 51 for providing rigid support for the voice coil, and a small diaphragm 52 and a large diaphragm 53 for providing flexible support, an inner pad 711 and an outer pad 721 which are electrically connected are provided on the flexible printed circuit board 7, and the voice coil assembly 6 includes: voice coil 6, incoming line 61 and outgoing line 62;

the flexible wiring board 7 includes an inner fixing portion 71 connected to the first stretching step of the dome 51, an annular outer fixing portion 72 connected to the edge portion of the holder 1, and a deformation portion 73 connected between the inner fixing portion 71 and the outer fixing portion 72, two inner lands 711 are provided on the inner fixing portion 71, and the voice coil incoming line 61 and the voice coil outgoing line 62 are electrically connected to the inner lands 711.

Referring to fig. 1, it can be known that, the speaker generally includes a main frame 1, a vibration system and a magnetic circuit system, wherein the main frame 1 encloses and closes to form an accommodating cavity, the magnetic circuit system and the vibration system are disposed in the accommodating cavity, the magnetic circuit system includes a magnetic cover 4, a center magnetic steel 21 and an edge magnetic steel 22 disposed on the magnetic cover 4, a center magnetic conductive sheet 3 disposed on the center magnetic steel 21, and an edge annular pole piece disposed on the edge magnetic steel 22, wherein the edge magnetic conductive sheet is injection-molded on the main frame 1 in this embodiment, a magnetic flux gap is formed between the center magnetic steel 21, the center magnetic steel 3, the edge magnetic steel 22, and the edge magnetic conductive sheet, the vibration system includes a dome 51, a small diaphragm 52, a large diaphragm 53, a flexible circuit board 7, and a voice coil 6, the voice coil 6 is annularly disposed in the magnetic flux gap, and the large diaphragm 6 is disposed on a first tensile step of the dome 51. During the working process of the loudspeaker, a magnetic field is generated in the magnetic flux gap, the voice coil 6 is electrified, the electrified voice coil 6 can generate vibration under the action of ampere force in the magnetic field, and the vibrating voice coil 6 can drive the ball top 51 and the large diaphragm 52 to vibrate together, so that the ball top 51 and the large diaphragm 52 push air to produce sound. The voice coil 6 is usually formed by winding a copper wire, and after the voice coil is formed by winding, a ring-shaped body and a lead wire connected to the outer peripheral surface of the body are usually formed, and the lead wire usually comprises an incoming wire 61 for leading current into the body and an outgoing wire 62 for leading current out of the body.

Referring to fig. 2, it is understood that, for the voice coil 6, it is necessary to have two mutually perpendicular dimensions, namely, a length direction (long side direction) and a width direction (short side direction), it should be noted that, when the two mutually perpendicular dimensions of the voice coil assembly 2 are equal, the definitions of the length direction and the width direction are still applicable, and the voice coil 6 also has a division of the in-turn and the out-turn regions, namely, the in-turn and the out-turn regions. In this embodiment, voice coil 6 is the rectangle frame form setting, certainly, is not the standard rectangle, is the rounding off setting in its edge to reduce the impaired probability of voice coil and external colliding with. It should be noted that the present design is not limited thereto, and in other embodiments, there are other shapes.

Referring to fig. 3-4, for the situation that the lead wire generates the dragging force to the vibration system, so that the voice coil is easy to polarize, the present invention introduces the flexible circuit board 7 and the independent small diaphragms 52 for elastically supporting the vibration system, the outer fixing part 72 of the flexible circuit board 7 is provided with the outer soldering land 721 electrically connected with the main frame 1, the inner fixing part 71 is provided with a plurality of inner soldering lands 711 electrically connected with the lead wire, and the inner fixing part 71 is connected with the outer fixing part 72 through the deformation part 73, because the deformation part 73 can move up and down along with the vibration system, both ends of the lead wire move up and down along with the vibration system, effectively eliminating the dragging force of the lead wire to the vibration system, further, two independent small diaphragms are respectively arranged at the deformation part of the long axis of the flexible circuit board, replacing the design of the 'connecting rib' of the conventional flexible deformation part, the small diaphragms have higher compliance, and the upper limit of deformation is larger, so that the vibration is easier under the same driving force, and the loudness is larger. Meanwhile, the defect that the connecting ribs of the flexible circuit board horizontally rotate under large amplitude due to small deformation can be relieved to a certain extent, so that the polarization condition is avoided, and the overall acoustic performance of the loudspeaker is improved.

Further, the upper end of the voice coil 6 is located inside the inner fixing portion 71 of the flexible wiring board 7. It can be understood that so set up, flexible line way board 7 separates and locates between voice coil 6 and support 1, can avoid voice coil 6 to take place to collide with to vibrating diaphragm 53 better.

Furthermore, two inner bonding pads 711 are arranged on the inner fixing portion 71, the outer fixing portion 72 is electrically connected with the two outer bonding pads 721 in a one-to-one correspondence manner, and the voice coil incoming line 62 and the voice coil outgoing line 61 are electrically connected with the two inner bonding pads 711 respectively; it can be understood that the flexible printed circuit 7 is in a rectangular ring shape corresponding to the voice coil assembly 2, and the short-side corner of the outer fixing portion 72 forms an outer pad 721, which ensures the reliability of the electrical connection between the flexible printed circuit 7 and the main frame 1. Specifically, the flexible printed circuit board 7 has a multi-layer structure, and a conductive copper foil layer is embedded therein, and the copper foil layer is exposed at each inner pad 711 so as to be soldered to a corresponding lead. It should be noted that the present design is not limited thereto.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a novel flexible line way board of speaker which characterized in that: the flexible circuit board comprises an inner fixing part, an outer fixing part and two deformation parts, wherein the inner fixing part and the outer fixing part are designed in a rectangular frame shape, the outer fixing part is sleeved on the outer side of the inner fixing part, the two deformation parts are respectively arranged between corresponding adjacent short shafts of the inner fixing part and the outer fixing part, the deformation parts are arranged in an S shape, the S-shaped end of each deformation part is connected with the short shaft end side of the outer fixing part, the S-shaped other end of each deformation part is connected with the short shaft end side of the inner fixing part, inner bonding pads are respectively arranged on the long shaft end sides of the two long shaft ends of the inner fixing part facing the outer fixing part, the outer fixing parts are respectively provided with two outer bonding pads, and circuit board leads are arranged on the outer fixing part, the deformation parts and the inner fixing parts through the outer fixing part, the two inner welding discs are electrically connected with the two outer welding discs in a one-to-one correspondence mode, the voice coil incoming line and the outgoing line of the loudspeaker are electrically connected with the corresponding inner welding discs respectively, the two independent small diaphragms are arranged, and the two independent small diaphragms are arranged on the two long shaft end sides of the outer fixing portion respectively.

2. The novel flexible circuit board of the loudspeaker of claim 1, characterized in that: the section of the independent small diaphragm is arranged in an S shape.

3. The novel flexible circuit board of the loudspeaker of claim 1, characterized in that: the thickness of the independent small membrane is 0.03-0.1 mm.

4. The novel flexible circuit board of the loudspeaker of claim 1, characterized in that: the independent small membrane is made of double-layer or multi-layer composite polyether-ether-ketone.

5. The novel flexible circuit board of the loudspeaker of claim 1, characterized in that: two the inner welding discs are arranged on the inner fixing part in point symmetry.

6. The novel flexible circuit board of the loudspeaker of claim 1, characterized in that: the two outer welding discs are respectively arranged at the junction of the long shaft and the short shaft of the outer fixing part.

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