Coaxial Speaker

Abstract

The present invention provides a coaxial speaker. [Solution] The coaxial speaker includes a support ring, a magnetic circuit system fixed below the support ring, and a first vibration system and a second vibration system fixed to both sides of the support ring and installed coaxially, the first vibration system includes a first diaphragm and a first voice coil driven to vibrate the first diaphragm to generate sound, the second vibration system includes a second diaphragm and a second voice coil driven to vibrate the second diaphragm to generate sound, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap located outside the first magnetic gap, at least a portion of the first voice coil is inserted into the first magnetic gap and at least a portion of the second voice coil is inserted into the second magnetic gap, the first diaphragm is used to generate high tones and the second diaphragm is used to generate low tones, and the second vibration system further includes a supporting voice coil sandwiched between the second voice coil and the second diaphragm. This coaxial speaker forms a coaxial full-range speaker for bass and treble, providing high-quality acoustic effects. With the supporting voice coil, the height position of the second voice coil can be flexibly adjusted according to actual needs.

Description

[Technical field]

[0001] The present invention relates to the field of electroacoustic conversion, and in particular to coaxial speakers. [Background technology]

[0002] A coaxial speaker is a speaker in which a treble speaker unit and a watt speaker unit are integrated and arranged coaxially. The sound sources of the treble speaker unit and the watt speaker unit of a coaxial speaker can be located in front of the coaxial speaker, meaning that the sound generation direction of the two speaker units is the same, or they can be located in front and behind the coaxial speaker, meaning that the sound generation directions of the two speaker units are different.

[0003] In the prior art, the treble speaker unit and the watt speaker unit of the coaxial speaker are each equipped with an independent vibration system and a magnetic circuit system, which makes the structure complicated, and the overall height of the coaxial speaker is increased by the treble speaker unit and the watt speaker unit, which makes installation inconvenient and reduces the applicability of the product.The voice coil is connected to the diaphragm through a bobbin, which makes it difficult to adjust the position of the voice coil, and requires constant redesign of the bobbin height, which increases costs.

[0004] Therefore, in order to solve the above technical problems, it is necessary to provide a new coaxial speaker. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a coaxial speaker that has excellent acoustic effects in high and low tones and allows the height of a voice coil to be flexibly adjusted. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a coaxial speaker, the coaxial speaker including a support ring, a magnetic circuit system fixed below the support ring, a first vibration system fixed inside the support ring, and a second vibration system fixed outside the support ring and arranged around the first vibration system, the first vibration system being disposed coaxially with the second vibration system, the first vibration system including a first diaphragm and a first voice coil driven to vibrate the first diaphragm to generate sound, the second vibration system including a second diaphragm and a first voice coil driven to vibrate the first diaphragm and generate sound, and a second voice coil driven to vibrate the second diaphragm to generate sound, the magnetic circuit system having a first magnetic gap and a second magnetic gap located outside the first magnetic gap, at least a portion of the first voice coil is inserted into the first magnetic gap and at least a portion of the second voice coil is inserted into the second magnetic gap, the first diaphragm is used to generate high-pitched sounds and the second diaphragm is used to generate low-pitched sounds, and the second vibration system further includes a supporting voice coil sandwiched between the second voice coil and the second diaphragm.

[0007] Preferably, the shape of the supporting voice coil is matched to the shape of the second voice coil, and the supporting voice coil is wound with a material having a smaller weight than the second voice coil, or the supporting voice coil is wound with a material having a smaller density than the second voice coil, or the supporting voice coil is wound with a material having a higher modulus than the second voice coil.

[0008] Preferably, the coaxial speaker further includes an insert surrounded by the magnetic circuit system and a first circuit board fixed to the insert, the insert having a first terminal passing therethrough, and the first voice coil electrically connected to the first circuit board via the first terminal.

[0009] Preferably, the coaxial speaker further includes a frame and an elastic assembly connecting the second vibration system and the frame, the elastic assembly including a second circuit board and a supporting diaphragm connected to the second circuit board, and the second voice coil is electrically connected to the second circuit board.

[0010] Preferably, the magnetic circuit system includes a magnetic bowl, the magnetic bowl including a side wall surrounding an accommodation space and a bottom wall formed by bending and extending from one end of the side wall, a portion of the insert is accommodated in the accommodation space, the magnetic circuit system including a first magnet steel assembly provided on one side of the bottom wall of the magnetic bowl and a second magnet steel assembly provided on the other side of the bottom wall of the magnetic bowl, the first magnet steel assembly including a first magnet steel, a first magnetic gap is formed between the first magnet steel and the side wall of the magnetic bowl, the second magnet steel assembly including a second magnet steel, a third magnet steel located outside the second magnet steel and spaced apart from the second magnet steel, and a magnetic permeable plate stacked above the third magnet steel, the first magnet steel, the bottom wall of the magnetic bowl, and the second magnet steel stacked to form the second magnetic gap between the magnetic permeable plate and the third magnet steel.

[0011] Preferably, the first magnet steel, the second magnet steel, and the third magnet steel are magnetized along the vibration direction of the coaxial speaker, the first magnet steel and the second magnet steel are arranged opposite each other with the same pole, and the magnetization directions of the second magnet steel and the third magnet steel are opposite.

[0012] Preferably, the first diaphragm includes a first dome and a first surround arranged around the first dome, a first fixed portion is provided on the first surround, the support ring includes an inner wall, and the first fixed portion is fixed by bonding it to the inner wall.

[0013] Preferably, the first magnet steel assembly includes a pole core provided on the first magnet steel, and a portion of the first fixed portion is sandwiched between an inner wall of the support ring and the pole core.

[0014] Preferably, the support ring includes an outer wall, the second diaphragm includes a second surround, a second dome arranged around the second surround, and a third surround arranged around the second dome, the third surround being fixed to the frame, the second vibration system further including a bobbin connecting the second surround, the second dome, and the third surround to the elastic assembly, and one end of the second surround close to the first vibration system is fixed to the outer wall of the support ring and / or the first magnet steel. Effect of the Invention

[0015] Compared with the prior art, the coaxial speaker of the present invention includes a support ring, a magnetic circuit system fixed below the support ring, a first vibration system fixed inside the support ring, and a second vibration system fixed outside the support ring and arranged around the first vibration system, the first vibration system is installed coaxially with the second vibration system, the first vibration system includes a first diaphragm and a first voice coil that drives the first diaphragm to vibrate and generate sound, the second vibration system includes a second diaphragm and a first voice coil that drives the second diaphragm to vibrate and generate sound, and a second voice coil driven to vibrate and generate sound, the magnetic circuit system having a first magnetic gap and a second magnetic gap located outside the first magnetic gap, at least a portion of the first voice coil inserted in the first magnetic gap and at least a portion of the second voice coil inserted in the second magnetic gap, the first diaphragm used to generate high-pitched sounds and the second diaphragm used to generate low-pitched sounds, and the second vibration system further includes a supporting voice coil sandwiched between the second voice coil and the second diaphragm. The coaxial speaker of the present invention provides bass acoustic effects by installing a circular bass vibration system, and a treble vibration system is installed inside the bass vibration system to provide treble acoustic effects, and the bass and treble form a coaxial full-band speaker, providing high-quality acoustic effects, and the two voice coils share part of the magnetic circuit system, further reducing costs and improving acoustic performance. In addition, the second voice coil of the coaxial speaker of the present invention is fixed to the second diaphragm through a supporting voice coil, avoiding the support of the voice coil bobbin, and the height position of the second voice coil can be flexibly adjusted according to actual needs. [Brief description of the drawings]

[0016] In order to more clearly describe the technical solutions in the embodiments of the present invention, the drawings necessary for describing the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any inventive work, among which: [Figure 1] FIG. 1 is a perspective view showing the configuration of a coaxial speaker according to the present invention. [Diagram 2] FIG. 2 is a perspective view of the coaxial speaker shown in FIG. 1 from another viewpoint. [Diagram 3] FIG. 3 is a partial exploded view of the coaxial speaker shown in FIG. [Figure 4] FIG. 4 is an exploded view of some parts of the coaxial speaker shown in FIG. [Diagram 5] FIG. 5 is an exploded view of the coaxial speaker shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line AA of FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line BB of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by those skilled in the art without making inventive efforts based on the embodiments of the present invention shall be included in the protection scope of the present invention.

[0018] 1 to 7 simultaneously, the present invention provides a coaxial speaker 100, which includes a support ring 1, a magnetic circuit system 2 fixed to the support ring 1, a first vibration system 3 fixed to the inside of the support ring 1, a second vibration system 4 fixed to the outside of the support ring 1, an insert 5, a first circuit board 6 fixed to the insert 5, a frame 7, and an elastic assembly 8, and the second vibration system 4 is arranged around the outside of the first vibration system 3 and coaxially with the first vibration system 3.

[0019] The support ring 1 has an approximately rectangular outer periphery and includes an inner wall 11 and an outer wall 12 opposite the inner wall 11, and the first vibration system 3 is fixed to the inner wall 11 of the support ring and the second vibration system 4 is fixed to the outer wall 12 of the support ring.

[0020] The magnetic circuit system 2 includes a magnetic bowl 21, a first magnet steel assembly 22 provided on one side of the magnetic bowl 21, and a second magnet steel assembly 23 provided on the other side of the magnetic bowl 21. The first magnet steel assembly 22 is provided coaxially with the second magnet steel assembly 23. The magnetic bowl 21 includes a side wall 211 surrounding an accommodating space 210, and a bottom wall 212 formed by bending and extending from one end of the side wall 211. The first magnet steel assembly 22 includes a first magnet steel 221 and a magnetic pole core 222 provided in the first magnet steel 221, and a first magnetic gap 220 is formed between the first magnet steel 221, the magnetic pole core 222, and the side wall 211 of the magnetic bowl 21. A tangential surface 2211 is provided on the outer edge of the surface of the first magnet steel 221 close to the second vibration system 4. The first magnet steel 221 is mounted on the bottom wall 212 of the magnetic bowl 21. The second magnet steel assembly 23 includes a second magnet steel 231, a third magnet steel 232 spaced from the second magnet steel 231, and a magnetic permeable plate 233 stacked above the third magnet steel 232. The first magnet steel 221, the bottom wall 212, and the second magnet steel 231 are stacked to form a second magnetic gap 230 between the magnetic permeable plate 233 and the third magnet steel 232. The bottom wall 212 of the magnetic bowl 21 is stacked above the second magnet steel 231, and the first magnet steel 221 is directly opposite the third magnet steel 232. The magnetic circuit system 2 further includes a yoke 24 on which the second magnet steel 231 and the third magnet steel 232 are mounted, and the lower surface of the yoke 24 is flush with the lower surface of the insert 5.

[0021] The first magnet steel 221, the second magnet steel 231, and the third magnet steel 232 are magnetized along the vibration direction of the coaxial speaker 100, and the first magnet steel 221 and the second magnet steel 231 are provided facing each other with the same pole, that is, the magnetization directions of the first magnet steel 221 and the second magnet steel 231 are opposite, and the magnetization directions of the second magnet steel 231 and the third magnet steel 232 are opposite. In this embodiment, the first magnet steel 221, the magnetic pole core 222, the second magnet steel 231, the third magnet steel 232, and the magnetic permeable plate 233 all have a hollow ring structure.

[0022] The first vibration system 3 includes a first diaphragm 31 and a first voice coil 32 that drives the first diaphragm 31 to vibrate and generate sound, at least a portion of the first voice coil 32 is inserted into the first magnetic gap 220, the first diaphragm 31 is used to generate high-pitched sounds, and the sound generation direction is upward along the vibration direction. The first diaphragm 31 includes a first dome 311 and a first surround 312 provided around the first dome 311, the first surround 312 being a hollow annular structure and projecting upward along the vibration direction, a first fixing portion 313 is provided on the outer edge of the first surround 312, a second fixing portion 314 is provided on the inner edge, the first fixing portion 313 is bonded to the inner wall 11 of the support ring 1 and fixed, the first dome 311 is bonded to the lower surface of the second fixing portion 314 and is sandwiched between the second fixing portion 314 and the first voice coil 32. A part of the first fixing portion 313 is sandwiched between the support ring 1 and the magnetic pole core 222.

[0023] The second vibration system 4 includes a second diaphragm 41, a second voice coil 42 that drives the second diaphragm 41 to vibrate and generate sound, a supporting voice coil 43 that connects the second diaphragm 41 and the second voice coil 42, and a bobbin 44 that connects the second diaphragm 41 and the elastic assembly 8, and at least a portion of the second voice coil 42 is inserted into the second magnetic gap 230, and the second diaphragm 41 is used to generate low-pitched sounds, and the sound generation direction is upward along the vibration direction. The second diaphragm 41 includes a second surround 411, a second dome 412 provided around the second surround 411, and a third surround 413 provided around the second dome 412. The second surround 411, the second dome 412, and the third surround 413 are all hollow annular structures, or the second surround 411 and the third surround 413 are connected by a connecting part, and the second dome 412 is bonded and fixed to the connecting part. The second surround 411 has a structure that protrudes upward along the vibration direction, and the third surround 413 has a structure that is recessed downward along the vibration direction. One end of the second surround 411 close to the first diaphragm 31 is fixed to the outer wall 12 of the support ring 1 and / or the first magnet steel 221, and the third surround 413 includes a third fixing part 4131.

[0024] The second voice coil 42 is fixed to the second diaphragm 41 via the supporting voice coil 43, and the shape of the supporting voice coil 43 is matched with the shape of the second voice coil 42, and the supporting voice coil 43 is wound with a material having a smaller weight than the second voice coil 42, or the supporting voice coil 43 is wound with a material having a smaller density than the second voice coil 42, or the supporting voice coil 43 is wound with a material having a higher modulus than the second voice coil 42, so that the thickness of the supporting voice coil 43 can be adjusted according to actual needs, and the height of the second voice coil 42 can also be flexibly adjusted.

[0025] The bobbin 44 connects the second surround 411, the second dome 412, the third surround 413 and the elastic assembly 8. The bobbin 44 includes a bobbin flat plate portion 441 that is attached to the second dome 412, and an extension portion 442 that is bent and extends from one end of the bobbin flat plate portion 441 to the elastic assembly 8 and is connected to the elastic assembly 8.

[0026] In order to provide a sufficient vibration space for the second voice coil 42, an avoidance recess 241 is provided in the yoke 24 at a location corresponding to the second voice coil 42.

[0027] The insert 5 is provided in an accommodating space 210 formed by being surrounded by a side wall 211 of the magnetic bowl 21, a first circuit board 6 is attached to the outer surface of the yoke 24, the insert 5 is provided with a first terminal 91 penetrating therethrough, the first terminal 91 is connected to the first circuit board 6, and the first voice coil 32 is electrically connected to the first circuit board 6 via the first terminal 91. The insert 5 is provided with a leak passage 51 penetrating therethrough.

[0028] The frame 7 is an annular steel ring, and the third fixing part 4131 of the third surround 413 is fixedly connected to the frame 7. Specifically, the third fixing part 4131 covers an upper surface and a part of an outer surface of the frame 7. The magnetic pole core 222 is fixed to one end of the frame 7 remote from the second diaphragm 41.

[0029] The elastic assembly 8 connects the bobbin 44 and the frame 7, the elastic assembly 8 includes a second circuit board 81 and a supporting diaphragm 82 connected to the second circuit board 81, the second voice coil 42 is electrically connected to the second circuit board 81, specifically, the coaxial speaker 100 further includes a second terminal 92 connected to the second circuit board 81, the second voice coil 42 is electrically connected to the second circuit board 81 through the second terminal 92. In this embodiment, the number of elastic assemblies 8 is two, and they are arranged in the short axis direction of the coaxial speaker 100, and in other embodiments, they can be determined according to circumstances. The extension portion 442 of the bobbin 44 is bent and extended to the second circuit board 81, and is connected to the second circuit board 81.

[0030] A coaxial speaker according to the present invention includes a support ring, a magnetic circuit system fixed below the support ring, a first vibration system fixed inside the support ring, and a second vibration system fixed outside the support ring and arranged around the first vibration system, the first vibration system being installed coaxially with the second vibration system, the first vibration system including a first diaphragm and a first voice coil driven to vibrate the first diaphragm to generate sound, the second vibration system including a second diaphragm and a second voice coil driven to vibrate the second diaphragm to generate sound, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap located outside the first magnetic gap, at least a portion of the first voice coil is inserted into the first magnetic gap and at least a portion of the second voice coil is inserted into the second magnetic gap, the first diaphragm is used to generate high-pitched sounds and the second diaphragm is used to generate low-pitched sounds, and the second vibration system further includes a supporting voice coil sandwiched between the second voice coil and the second diaphragm. The coaxial speaker of the present invention provides bass acoustic effects by installing a circular bass vibration system, and a treble vibration system is installed inside the bass vibration system to provide treble acoustic effects, and the bass and treble form a coaxial full-band speaker, providing high-quality acoustic effects, and the two voice coils share part of the magnetic circuit system, further reducing costs and improving acoustic performance. In addition, the second voice coil of the coaxial speaker of the present invention is fixed to the second diaphragm through a supporting voice coil, avoiding the support of the voice coil bobbin, and the height position of the second voice coil can be flexibly adjusted according to actual needs.

[0031] The above is merely an embodiment of the present invention, and it should be noted here that those skilled in the art may make modifications without departing from the creative idea of ​​the present invention, and all such modifications are within the scope of protection of the present invention.

Claims

1. A coaxial speaker, a support ring, a magnetic circuit system fixed below the support ring, a first vibration system fixed inside the support ring, and a second vibration system fixed outside the support ring and arranged around the first vibration system, the first vibration system being installed coaxially with the second vibration system, the first vibration system including a first diaphragm and a first voice coil driven to vibrate the first diaphragm to generate sound, the second vibration system including a second diaphragm and a second voice coil driven to vibrate the second diaphragm to generate sound, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap located outside the first magnetic gap, at least a portion of the first voice coil is inserted in the first magnetic gap, and at least a portion of the second voice coil is inserted in the second magnetic gap, the first diaphragm is used to generate high-pitched sounds, and the second diaphragm is used to generate low-pitched sounds, and the second vibration system further includes a supporting voice coil sandwiched between the second voice coil and the second diaphragm, The coaxial speaker further includes an insert provided around the magnetic circuit system, and a first circuit board fixed to the insert, the insert is provided with a first terminal penetrating the insert, and the first voice coil is electrically connected to the first circuit board via the first terminal. The magnetic circuit system includes a magnetic bowl, the magnetic bowl including a side wall surrounding an accommodation space and a bottom wall formed by bending and extending from one end of the side wall, a portion of the insert is accommodated in the accommodation space, the magnetic circuit system includes a first magnet steel assembly provided on one side of the bottom wall of the magnetic bowl and a second magnet steel assembly provided on the other side of the bottom wall of the magnetic bowl, the first magnet steel assembly is provided coaxially with the second magnet steel assembly, the first magnet steel assembly includes a first magnet steel and a magnetic pole core provided in the first magnet steel, the first magnetic gear is disposed between the first magnet steel, the magnetic pole core and the side wall of the magnetic bowl. a cap is formed, and a tangential surface is provided on an outer edge of a surface of the first magnet steel close to the second vibration system, the first magnet steel is mounted on a bottom wall of the magnetic bowl, the second magnet steel assembly includes a second magnet steel, a third magnet steel located outside the second magnet steel and spaced apart from the second magnet steel, and a magnetic permeable plate stacked above the third magnet steel, the first magnet steel, the bottom wall of the magnetic bowl, and the second magnet steel are stacked to form the second magnetic gap between the magnetic permeable plate and the third magnet steel, the bottom wall of the magnetic bowl is stacked above the second magnet steel, and the first magnet steel is directly opposite the third magnet steel, The magnetic circuit system further includes a yoke carrying the second magnet steel and the third magnet steel, and a lower surface of the yoke is flush with a lower surface of the insert. A coaxial speaker characterized by:

2. The shape of the supporting voice coil is matched with the shape of the second voice coil, and the supporting voice coil is wound with a material having a smaller weight than the second voice coil, or the supporting voice coil is wound with a material having a smaller density than the second voice coil, or the supporting voice coil is wound with a material having a higher modulus than the second voice coil.

2. A coaxial speaker according to claim 1.

3. The coaxial speaker further includes a frame and an elastic assembly connecting the second vibration system and the frame, the elastic assembly including a second circuit board and a supporting diaphragm connected to the second circuit board, and the second voice coil is electrically connected to the second circuit board.

3. A coaxial speaker according to claim 2.

4. The first magnet steel, the second magnet steel, and the third magnet steel are magnetized along the vibration direction of the coaxial speaker, the first magnet steel and the second magnet steel are provided opposite to each other with the same pole, and the magnetization directions of the second magnet steel and the third magnet steel are opposite to each other.

4. A coaxial speaker according to claim 3.

5. The first diaphragm includes a first dome and a first surround provided around the first dome, the first surround is provided with a first fixing portion, the support ring includes an inner wall, and the first fixing portion is bonded and fixed to the inner wall.

5. A coaxial speaker according to claim 4.

6. A portion of the first fixed portion is sandwiched between an inner wall of the support ring and the magnetic pole core.

6. A coaxial speaker according to claim 5.

7. the support ring includes an outer wall, the second diaphragm includes a second surround, a second dome arranged around the second surround, and a third surround arranged around the second dome, the third surround being fixed to the frame, the second vibration system further includes a bobbin connecting the second surround, the second dome, and the third surround to the elastic assembly, and one end of the second surround close to the first vibration system is fixed to the outer wall of the support ring and / or the first magnet steel.

5. A coaxial speaker according to claim 4.

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