CN222366388U - A planar diaphragm speaker - Google Patents

Abstract

The utility model discloses a planar diaphragm loudspeaker, comprising a bracket and a solder pad; a sound-producing component is arranged in the bracket; the sound-producing component comprises a magnet, a diaphragm and a voice coil, the voice coil is connected to the diaphragm, and the diaphragm and the magnet are arranged at intervals; the bracket has a receiving cavity penetrating the upper and lower ends of the bracket, and an annular step is arranged in the receiving cavity; the annular step is protruded from the inner wall surface of the bracket toward one side of the receiving cavity; the annular step is provided with a first avoidance notch for the lead wire of the voice coil to extend out; the magnet is installed on the annular step; it plays a good fixing and supporting role, so that its overall structure is compact, the volume is small, the number of parts is small, the assembly difficulty is low, the production efficiency is high, the production cost is low, and the thickness of the loudspeaker can be greatly reduced.

Description

Plane vibrating diaphragm loudspeaker

Technical Field

The utility model relates to the technology of the field of loudspeakers, in particular to a planar vibrating diaphragm loudspeaker.

Background

Compared with an electrostatic loudspeaker and a moving coil loudspeaker, the planar vibrating diaphragm loudspeaker has the advantages of larger vibration area and better tone quality, combines the advantages of two transduction modes of a moving coil and static electricity, has better performance in low frequency and is stronger than the moving coil in high frequency.

The current planar vibrating diaphragm loudspeaker is of an internal magnetic design, namely comprises an annular shell, a vibrating assembly and a magnetic circuit assembly, wherein the inner edge and the outer edge of the annular vibrating assembly are fixed on the shell, the magnetic circuit assembly comprises U-shaped iron fixed in the shell, a magnet and Hua Sigu are fixed in the U-shaped iron, a magnetic gap is formed between the magnet and the side wall of the washer and the U-shaped iron, the internal magnetic planar vibrating diaphragm loudspeaker not only increases the assembly difficulty of the planar vibrating diaphragm loudspeaker in a mode of assembling the magnet through the U-shaped iron, reduces the production efficiency of the planar vibrating diaphragm loudspeaker, but also has a lower BL value, simultaneously, the volume of the planar vibrating diaphragm loudspeaker is larger, the trend that the current electronic product develops towards the light, thin and small directions cannot be met, and especially, the components are more, the structure is complex, the assembly difficulty is large, and the production cost is high.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of utility model

In view of the above, the main object of the present utility model is to provide a planar diaphragm loudspeaker, which has a compact overall structure, small volume, few parts, low assembly difficulty, high production efficiency, low production cost, greatly reduced thickness of the loudspeaker, and higher BL value of the loudspeaker, by providing annular steps in the hollow bracket and the accommodating cavity, and having good fixing and supporting effects.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

A planar vibrating diaphragm loudspeaker comprises a bracket and a welding disc used for enabling current to flow in and out, wherein a sound producing assembly is arranged in the bracket and comprises a magnet, a vibrating diaphragm and a voice coil, the voice coil is connected to the vibrating diaphragm, and the vibrating diaphragm and the magnet are arranged at intervals;

The support is provided with a containing cavity penetrating through the upper end and the lower end of the support, an annular step is arranged in the containing cavity, the annular step is arranged protruding from the inner wall surface of the support towards one side of the containing cavity, the annular step is provided with a first avoiding notch for extending out a lead wire of the voice coil, and the magnet is arranged on the annular step.

As a preferable scheme, the width of the annular step is 0.1mm-0.3mm, and the height of the annular step is 0.1mm-0.3mm.

The voice coil is characterized in that the outer side of the support is provided with a first installation part which is concavely arranged inwards, the first installation part is provided with a height direction and a length direction which are mutually perpendicular, the height direction of the first installation part is parallel to the height direction of the support, and the inner side of the first installation part is communicated with the accommodating cavity;

And/or

The outside of support has the second installation department that inwards concave establishes, and second installation department has mutually perpendicular's direction of height and length direction, the direction of height of second installation department is parallel with the direction of height of support, second installation department is used for making things convenient for follow-up loudspeaker side to put spot welding location.

As a preferable scheme, a first thickening part is convexly arranged at one end of the first mounting part, which is close to the inner side of the bracket;

And/or

The first thickened part and the second thickened part are oppositely arranged, and at least part of the first thickened part and the second thickened part is contacted with the inner side surface of the annular step.

As a preferable scheme, one side of the first thickened part and one side of the second thickened part, which are close to the vibrating diaphragm, are respectively provided with an avoidance surface.

As a preferable scheme, the lower end of the bracket corresponding to the first installation part is further provided with a second avoidance notch for the voice coil lead to extend out, and the second avoidance notch is communicated with the accommodating cavity.

Preferably, the bonding pad includes a bonding pad portion for connecting with a lead of the voice coil and a conductive portion for electrically connecting with an external element.

As a preferable scheme, the vibrating diaphragm comprises a middle part and an outer ring part, wherein the outer ring part is arranged along the periphery of the middle part in a surrounding way, a diaphragm ring is arranged on one surface of the outer ring part, a middle paste is arranged on one surface and/or the other surface of the middle part, and the voice coil is adhered to the middle part.

The annular step comprises a first step surface and a second step surface which are oppositely arranged, wherein the magnet comprises a first magnet group and a second magnet group, and the first magnet group and the membrane ring are arranged on the first step surface;

the second magnet group is arranged on the second step surface to form a first annular gap, so that the vibrating diaphragm and the voice coil are arranged in the first annular gap.

As a preferable scheme, the bracket is provided with a sound outlet, the first magnet group comprises a first inner magnet and a first outer magnet, the first inner magnet is provided with a first inner annular hole, the first outer magnet is provided with a first outer annular hole, the first outer magnet is sleeved outside the first inner magnet through the first outer annular hole, and the outer wall of the first inner magnet and the inner wall of the first outer magnet form a second annular gap;

The second magnet group comprises a second inner magnet and a second outer magnet, the second inner magnet is provided with a second inner annular hole, the second outer magnet is provided with a second outer annular hole, the second outer magnet is sleeved outside the second inner magnet through the second outer annular hole, and a third annular gap is formed between the outer wall of the second inner magnet and the inner wall of the second outer magnet;

The magnetic poles of the second inner magnet close to one end of the diaphragm are opposite to those of the other end of the second outer magnet close to the diaphragm, the magnetic poles of the same side ends of the second inner magnet and the second outer magnet are opposite, and the magnetic poles of the opposite ends of the first inner magnet and the first outer magnet are the same as those of the second inner magnet and the second outer magnet.

Compared with the prior art, the loudspeaker has the obvious advantages and beneficial effects, and particularly, the technical scheme shows that the loudspeaker is mainly characterized in that the annular steps are arranged in the hollow support and the accommodating cavity, the magnet is arranged on the annular steps to play a good role in fixing and supporting, and particularly, the loudspeaker adopts a U-free iron design, so that a single U iron is not needed to support the magnet, the whole structure is compact, the size is small, the parts are few, the assembly difficulty is low, the production efficiency is high, the production cost is low, the thickness of the loudspeaker can be greatly reduced, the loudspeaker is effectively thinned, the magnet is positioned at the outermost side of the loudspeaker, the magnetic field intensity of the magnet is high, the sensitivity of the loudspeaker is high, and the annular steps are provided with the first avoidance notch, so that the lead wire of the voice coil can be safely led out, and the diaphragm ring of the diaphragm is prevented from being extruded to the lead wire of the voice coil.

In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a perspective view of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view (single tone circle) of an embodiment of the present utility model;

FIG. 3 is another cross-sectional view of an embodiment of the present utility model;

FIG. 4 is yet another cross-sectional view of an embodiment of the present utility model;

FIG. 5 is an exploded view of an embodiment of the present utility model;

FIG. 6 is a top view of an embodiment of a stand of the present utility model;

FIG. 7 is a perspective view of a stand according to an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of a diaphragm according to an embodiment of the present utility model;

FIG. 9 is a cross-sectional view (dual voice coil) of an embodiment of the present utility model;

FIG. 10 is another cross-sectional view (dual voice coil) of an embodiment of the present utility model;

fig. 11 is yet another cross-sectional view (dual voice coil) of an embodiment of the present utility model.

The attached drawings are used for identifying and describing:

10. Bracket 11, magnet

111. First magnet group 112, second magnet group

1111. First inner magnet 1112, first outer magnet

1121. Second inner magnet 1122, second outer magnet

12. Vibrating diaphragm 13, voice coil

121. Intermediate portion 122, outer ring portion

123. Membrane ring 124, middle paste

14. Accommodating chamber 15, annular step

16. First and second mounting portions 17 and 17

151. First step surface 152, second step surface

181. First avoidance slot 182, second avoidance slot

191. First and second thickened portions 192, 192

20. Pad 21, tab portion.

Detailed Description

Referring to fig. 1 to 11, specific structures of embodiments of the present utility model are shown.

In the description of the present utility model, it should be noted that, for the azimuth words, terms such as "upper", "lower", "front", "rear", "left", "right", etc., indicate azimuth and positional relationships as shown based on the drawings or when worn normally, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the device or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.

A planar vibrating diaphragm loudspeaker comprises a support 10 and a bonding pad 20.

The voice coil 13 is connected to the vibrating diaphragm 12, the voice coil 13 is electrically connected to the bonding pad 20, wherein the heights of one end of the voice coil and one end of the magnet 11 are 0.05mm-0.1mm, when the number of the voice coils 13 is two, the two voice coils 13 are respectively connected to the upper end and the lower end of the vibrating diaphragm 12, a single-sided voice coil 13 or a double-sided voice coil 13 structure can be selected according to the cost and effect requirement, if the single-sided voice coil 13 is manufactured, the distance between the diaphragm and the magnet 11 can be reduced on the other side without the voice coil 13, BL value can be increased by one frequency, and the sensitivity of the tweeter can be improved from the surface. Wherein the dual voice coil 13 design allows the effective BL to be lifted up to 2 times that of the original single voice coil 13 without increasing the product height and additional magnetic circuit.

The diaphragm 12 is spaced from the magnet 11. Preferably, the diaphragm 12 includes a middle portion 121 and an outer ring portion 122, the outer ring portion 122 is circumferentially disposed along the outer periphery of the middle portion 121, a diaphragm ring 123 is disposed at one end of the outer ring portion 122, a middle patch 124 is disposed at one end and/or the other end of the middle portion 121, the voice coil 13 is adhered to the middle portion 121, and the rigidity and symmetry of the central portion of the diaphragm 12 are increased by the design of the middle patch 124, so that a foundation is provided for adhering the voice coil 13 up and down.

The bracket 10 is a metal bracket 10 or a plastic bracket 10. The support 10 is provided with a containing cavity 14 penetrating through the upper end and the lower end of the support 10, an annular step 15 is arranged in the containing cavity 14, the annular step 15 is arranged protruding from the inner wall surface of the support 10 towards one side of the containing cavity 14, the magnet 11 is arranged on the annular step 15, the annular step 15 is provided with a first avoidance notch 181 used for extending out a lead wire of a voice coil, preferably, the width of the annular step 15 is 0.1mm-0.3mm, and the height of the annular step 15 is 0.1mm-0.3mm.

The outer side of the bracket 10 is provided with a first installation part 16 concaved inwards, the first installation part 16 is provided with a height direction and a length direction which are mutually perpendicular, the height direction of the first installation part 16 is parallel to the height direction of the bracket 10, and the inner side of the first installation part 16 is communicated with the accommodating cavity 14;

And/or

The outside of support 10 has the second installation department 17 that inwards concave establishes, and second installation department 17 has mutually perpendicular's direction of height and length direction, the direction of height of second installation department 17 is parallel with the direction of height of support 10, second installation department 17 is used for making things convenient for follow-up loudspeaker side to put spot welding location. The design of the second mounting part 17 is utilized, so that the bracket can be rapidly positioned in the jig without affecting the maximum outer diameter of the bracket 10, visual rapid automatic spot welding is realized, the working efficiency is improved, the horn structure can be ultrathin, the outer diameter size is easy to be small, and the horn structure is flexibly combined with a bass unit horn.

The lower end of the bracket 10 corresponding to the first mounting portion 16 is further provided with a second avoidance notch 182 for extending out a voice coil lead, and the second avoidance notch 182 is communicated with the accommodating cavity 14, so that the film ring 123 of the diaphragm 12 cannot squeeze the lead of the voice coil 13.

Preferably, a first thickened portion 191 is protruded at an inner end of the first mounting portion 16 near the bracket 10;

And/or

The second mounting portion 17 is provided with a second thickened portion 192 protruding from an inner side end of the second mounting portion near the bracket 10, wherein the first thickened portion 191 and the second thickened portion 192 are disposed opposite to each other, and at least part of the first thickened portion 191 and the second thickened portion 192 is in contact with an inner side surface of the annular step 15.

Preferably, the sides of the first thickened portion 191 and the second thickened portion 192 close to the diaphragm are provided with avoiding surfaces, wherein the sides of the first thickened portion 191 and the second thickened portion 192 close to the diaphragm in the height direction are thinned to form the avoiding surfaces, so that an assembly position is provided for the diaphragm 12, the diaphragm is prevented from being damaged due to collision with the thickened portions in the process of sounding vibration, or the diaphragm does not have enough travel to cause poor sounding effect.

The bonding pad 20 is used for current to flow in and out, the bonding pad 20 is integrally formed at the first mounting part 16 in an encapsulation mode, so that the wall thickness of the support can be 0.2mm, copper rings can be saved, the operation difficulty of welding voice coil leads can be effectively reduced compared with the traditional welding mode between the PCB and the voice coil leads under the condition that the height is not increased, the working efficiency is improved, welding defects such as no sound and short circuit are reduced, and the bonding pad can be used for omitting welding external electronic wires and facilitating FPC communication welding.

The pad 20 includes a tab portion 21 for connection with a lead of the voice coil 13 and a conductive portion for electrical connection with an external element. When the lead wire of the voice coil 13 is pulled out and welded on the lug part 21 of the welding pad 20, the welding point is covered with UV glue, so that the operation is simple, the error is not easy, and the efficiency is high. In order to reduce the weight and improve the high-frequency performance of the loudspeaker, the lead wire of the voice coil 13 can be changed into an ultrahigh-tension copper-clad aluminum wire because of small amplitude of the tweeter.

Preferably, the annular step 15 includes a first step surface 151 and a second step surface 152 that are disposed opposite to each other, the magnet 11 includes a first magnet group 111 and a second magnet group 112, the first magnet group 111 and the diaphragm ring 123 are disposed on the first step surface 151, and the second magnet group 112 is disposed on the second step surface 152 to form a first annular gap, so that the diaphragm 12 and the voice coil 13 are disposed in the first annular gap.

The first magnet set 111 includes a first inner magnet 1111 and a first outer magnet 1112, the first inner magnet 1111 includes a first inner annular hole, the first outer magnet 1112 includes a first outer annular hole, the first outer magnet 1112 is sleeved outside the first inner magnet 1111 through the first outer annular hole, a second annular gap is formed between an outer wall of the first inner magnet 1111 and an inner wall of the first outer magnet 1112, the first inner annular hole is communicated with the first sound outlet, the second magnet set 112 includes a second inner magnet 1121 and a second outer magnet 1122, the second inner magnet 1121 includes a second inner annular hole, the second outer magnet 1122 includes a second outer annular hole, the second outer magnet 1122 is sleeved outside the second inner magnet 1121 through the second outer annular hole, a third annular gap is formed between an outer wall of the second inner magnet 1121 and an inner wall of the second outer magnet 1122, and the second inner annular hole is communicated with the second sound outlet. The first sound outlet or the second sound outlet can be selected for sound production according to actual requirements, and after one sound producing opening is selected, the sound producing opening on the other side can be plugged by glue or a gasket. Preferably, the second annular gap and the third annular gap are each 0.01mm-0.05mm.

Preferably, one end of the first inner magnet 1111 is opposite to the other end, one end of the first outer magnet 1112 is opposite to the other end, and the same side ends of the first inner magnet 1111 and the first outer magnet 1112 are opposite to each other;

The second inner magnet 1121 has opposite poles at one end and opposite poles at the other end, the second outer magnet 1122 has opposite poles at one end and opposite poles at the other end, the second inner magnet 1121 and the second outer magnet 1122 have opposite poles at the same side, and the first inner magnet 1111 and the first outer magnet 1112 are arranged opposite to each other with the same poles at the opposite ends of the second inner magnet 1121 and the second outer magnet 1122. The first inner magnet 1111 and the first outer magnet 1112 and the second inner magnet 1121 and the second outer magnet 1122 can be changed into a single-sided magnetic circuit structure, so that the cost can be reduced and the process can be simplified.

The loudspeaker is characterized in that the annular step is arranged in the accommodating cavity, the magnet is arranged on the annular step to play a good role in fixing and supporting, and particularly, the loudspeaker adopts a U-iron-free design, so that an independent U iron is not needed to support the magnet, the whole structure is compact, the size is small, parts are few, the assembly difficulty is low, the production efficiency is high, the thickness of the loudspeaker can be greatly reduced, the loudspeaker is effectively thinned, the magnet is positioned at the outermost side of the loudspeaker, the magnetic field intensity of the magnet is high, the sensitivity of the loudspeaker is high, and the annular step is provided with a first avoidance notch, so that a lead of the voice coil can be safely led out, and a diaphragm ring of the diaphragm is prevented from being extruded to the lead of the voice coil.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model are still within the scope of the technical solutions of the present utility model.

Claims (10)

1. The planar vibrating diaphragm loudspeaker comprises a support and a welding pad for current to flow in and out, wherein a sounding component is arranged in the support, the sounding component comprises a magnet, a vibrating diaphragm and a voice coil, the voice coil is connected to the vibrating diaphragm, the vibrating diaphragm and the magnet are arranged at intervals, and the planar vibrating diaphragm loudspeaker is characterized in that:

The support is provided with a containing cavity penetrating through the upper end and the lower end of the support, an annular step is arranged in the containing cavity, the annular step is arranged protruding from the inner wall surface of the support towards one side of the containing cavity, the annular step is provided with a first avoiding notch for extending out a lead wire of the voice coil, and the magnet is arranged on the annular step.

2. The planar diaphragm loudspeaker of claim 1 wherein the annular step has a width of 0.1mm to 0.3mm and a height of 0.1mm to 0.3mm.

3. The flat vibrating diaphragm loudspeaker of claim 1, wherein the outer side of the bracket is provided with a first installation part concavely arranged inwards, the first installation part is provided with a height direction and a length direction which are mutually perpendicular, the height direction of the first installation part is parallel to the height direction of the bracket, and the inner side of the first installation part is communicated with the accommodating cavity;

And/or

The outside of support has the second installation department that inwards concave establishes, and second installation department has mutually perpendicular's direction of height and length direction, the direction of height of second installation department is parallel with the direction of height of support, second installation department is used for making things convenient for follow-up loudspeaker side to put spot welding location.

4. The loudspeaker of claim 3 wherein the first mounting portion has a first thickened portion protruding from an end of the first mounting portion adjacent the inner side of the bracket;

And/or

The first thickened part and the second thickened part are oppositely arranged, and at least part of the first thickened part and the second thickened part is contacted with the inner side surface of the annular step.

5. The loudspeaker of claim 4 wherein the first thickened portion and the second thickened portion each have a relief surface on a side thereof adjacent the diaphragm.

6. The flat diaphragm loudspeaker of claim 3 wherein a second avoidance notch for extending out of the voice coil lead is further formed in the support corresponding to the lower end of the first mounting portion, and the second avoidance notch is communicated with the accommodating cavity.

7. The flat diaphragm loudspeaker of claim 1 wherein said bonding pad includes a bonding pad portion for connecting with a lead of said voice coil and a conductive portion for electrically connecting with an external component.

8. The flat diaphragm loudspeaker of claim 1, wherein the diaphragm comprises a middle part and an outer ring part, the outer ring part is arranged around the periphery of the middle part, a diaphragm ring is arranged on one surface of the outer ring part, a middle paste is arranged on one surface and/or the other surface of the middle part, and the voice coil is adhered on the middle part.

9. The loudspeaker of claim 8 wherein the annular step comprises a first step surface and a second step surface disposed opposite each other, the magnet comprising a first magnet assembly and a second magnet assembly, the first magnet assembly and the diaphragm ring disposed on the first step surface;

the second magnet group is arranged on the second step surface to form a first annular gap, so that the vibrating diaphragm and the voice coil are arranged in the first annular gap.

10. The planar vibrating diaphragm loudspeaker according to claim 9, wherein the support is provided with a sound outlet, the first magnet group comprises a first inner magnet and a first outer magnet, the first inner magnet is provided with a first inner annular hole, the first outer magnet is provided with a first outer annular hole, the first outer magnet is sleeved outside the first inner magnet through the first outer annular hole, and a second annular gap is formed between the outer wall of the first inner magnet and the inner wall of the first outer magnet;

The second magnet group comprises a second inner magnet and a second outer magnet, the second inner magnet is provided with a second inner annular hole, the second outer magnet is provided with a second outer annular hole, the second outer magnet is sleeved outside the second inner magnet through the second outer annular hole, and a third annular gap is formed between the outer wall of the second inner magnet and the inner wall of the second outer magnet;

The magnetic poles of the second inner magnet close to one end of the diaphragm are opposite to those of the other end of the second outer magnet close to the diaphragm, the magnetic poles of the same side ends of the second inner magnet and the second outer magnet are opposite, and the magnetic poles of the opposite ends of the first inner magnet and the first outer magnet are the same as those of the second inner magnet and the second outer magnet.