CN219659905U - Coaxial loudspeaker - Google Patents
Coaxial loudspeaker Download PDFInfo
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- CN219659905U CN219659905U CN202320786300.1U CN202320786300U CN219659905U CN 219659905 U CN219659905 U CN 219659905U CN 202320786300 U CN202320786300 U CN 202320786300U CN 219659905 U CN219659905 U CN 219659905U
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- magnetic steel
- annular
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- diaphragm
- magnetic
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The coaxial loudspeaker comprises a magnetic circuit system, a first sound generating unit and a second sound generating unit which is arranged on the outer side of the first sound generating unit in a surrounding mode, wherein the first sound generating unit comprises a first vibrating diaphragm and a first voice coil, the second sound generating unit comprises a second vibrating diaphragm and a second voice coil, the magnetic circuit system comprises an annular magnet part, magnetic steel and a pole core which are arranged on the outer side of the annular magnet part, and first annular magnetic steel which is sleeved on an insert inserted into the inner side of the annular magnet part, the magnetic poles of the inner surface and the outer surface of the first annular magnetic steel are opposite, the annular magnet part comprises a second annular magnetic steel, an annular pole core and a third annular magnetic steel, the first annular magnetic steel, the second annular magnetic steel, the annular pole core and the third annular magnetic steel are arranged at intervals relatively to form a magnetic gap of the first voice coil, a magnetic gap of the second voice coil is formed between the magnetic steel and the pole core, and the inner periphery of the first vibrating diaphragm is fixed on the third annular magnetic steel. The coaxial loudspeaker of the utility model improves the low-frequency performance.
Description
[ field of technology ]
The utility model relates to the field of electroacoustic conversion, in particular to a coaxial loudspeaker.
[ background Art ]
The related art coaxial speaker includes a first sound generating unit and a second sound generating unit coaxially disposed, the second sound generating unit is circumferentially disposed outside the first sound generating unit, the first sound generating unit normally generates a high frequency sound, and the second sound generating unit normally generates a low frequency sound. However, the amplitude limitation of the first sound generating unit limits the high-frequency sound generation of the first sound generating unit, so that the low-frequency performance of the coaxial loudspeaker is limited.
Therefore, it is necessary to provide a new coaxial speaker to solve the above technical problems.
[ utility model ]
The utility model aims to overcome the technical problems and provide a coaxial loudspeaker with improved low-frequency performance.
In order to achieve the above object, the present utility model provides a coaxial speaker, including a magnetic circuit, a support frame fixed to the magnetic circuit, a first sound generating unit and a second sound generating unit coaxially disposed, where the second sound generating unit is disposed around the outside of the first sound generating unit, the first sound generating unit includes a first diaphragm and a first voice coil driving the first diaphragm to vibrate and generate sound, the second sound generating unit includes a second diaphragm and a second voice coil driving the second diaphragm to vibrate, the magnetic circuit includes a bottom plate having a through hole, an annular magnet portion fixed to the bottom plate, a magnetic steel fixed to the bottom plate and disposed outside the annular magnet portion, and a pole core fixed to the magnetic steel, the coaxial speaker further includes a first annular magnetic steel sleeved on the inner side of the magnetic steel, the first annular magnetic steel includes an inner surface and an outer surface opposite to the inner surface, a magnetic pole of the inner surface and the second magnetic steel is fixed to the annular magnetic steel, the first annular magnetic steel and the second magnetic steel is fixed to the annular magnetic steel and the annular magnetic steel, the second magnetic steel is fixed to the annular magnetic steel and the annular magnetic steel is fixed to the annular magnetic steel, the outer periphery of the second vibrating diaphragm is fixed on the supporting frame, and the inner periphery of the second vibrating diaphragm is fixed on the third annular magnetic steel.
Preferably, the insert comprises a first step part and a second step part positioned on the first step part, the second annular magnetic steel part is overlapped on the first step part, and the first annular magnetic steel is abutted to the second step part.
Preferably, the insert is embedded with a conductive terminal for electrically connecting with the first voice coil.
Preferably, the pole core includes a main body portion attached to the magnetic steel and an extension portion extending from the main body portion in a direction away from the annular magnet portion, and the support frame is fixed to the extension portion.
Preferably, the second sound generating unit further includes an elastic support member disposed at an interval with the second diaphragm, and a skeleton connecting the second diaphragm with the elastic support member, the extension portions are respectively disposed at two opposite long axis sides of the coaxial speaker, the elastic support member is respectively disposed at two opposite short axis sides of the coaxial speaker, the skeleton includes a flat plate portion and a leg bent and extended from the flat plate portion for fixing the elastic support member, the flat plate portion serves as a part of the second diaphragm, the leg is disposed between the support frame and the pole core, an external fixing portion of the elastic support member is fixed to the support frame, and an internal fixing portion of the elastic support member is fixed to the leg.
Preferably, the elastic support member includes a flexible circuit board fixed to the leg for electrical connection with the second voice coil and an auxiliary diaphragm fixed to a bottom surface of the flexible circuit board remote from the second diaphragm.
Preferably, the first diaphragm, the second diaphragm and the skeleton are integrally formed.
Preferably, the second annular magnetic steel, the third annular magnetic steel and the magnetic steel magnetize along the vibration direction of the first voice coil and the second voice coil, the polarities of the magnetic poles of the second annular magnetic steel and the third annular magnetic steel which are opposite to each other are the same and opposite to the polarities of the magnetic poles of the outer surface, and the polarities of the magnetic poles of the magnetic steel, which are close to the pole core, are the same as the polarities of the magnetic poles of the outer surface.
In the coaxial loudspeaker, the first annular magnetic steel is sleeved on the insert inserted into the inner side of the annular magnet part, the magnetic poles on the inner surface of the first annular magnetic steel are opposite to the magnetic poles on the outer surface of the first annular magnetic steel, the second annular magnetic steel, the annular pole core and the third annular magnetic steel are oppositely arranged at intervals to form a first magnetic gap of the first voice coil, a second magnetic gap of the second voice coil is formed between the magnetic steel, the pole core and the annular magnet part, and the outer periphery of the first vibrating diaphragm and the inner periphery of the second vibrating diaphragm are fixed on the third annular magnetic steel, so that the amplitude of the first sound generating unit can be increased, and meanwhile, the first voice coil is provided with a magnetic field through the first annular magnetic steel, so that the low-frequency performance of the first sound generating unit is improved, the limit that the first sound generating unit can only generate high-frequency sound is broken, and the low-frequency performance of the coaxial loudspeaker is further improved.
[ description of the drawings ]
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it will be obvious that the drawings in the description below are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person having ordinary skill in the art of the present utility model, wherein:
fig. 1 is a perspective view of a coaxial speaker of the present utility model;
fig. 2 is an exploded perspective view of the coaxial speaker of fig. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 4 is a cross-sectional view taken along line B-B of fig. 1.
[ detailed description ] of the utility model
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present utility model, are within the scope of the present utility model.
Referring to fig. 1-4, the present utility model provides a coaxial speaker 100, where the coaxial speaker 100 includes a magnetic circuit 1, a support frame 2 fixed on the magnetic circuit 1, and a first sound generating unit 3 and a second sound generating unit 4 coaxially disposed, and the second sound generating unit 4 is circumferentially disposed outside the first sound generating unit 3.
The first sound generating unit 3 comprises a first diaphragm 31 and a first voice coil 32 for driving the first diaphragm 31 to vibrate and generate sound, and the second sound generating unit 4 comprises a second diaphragm 41 and a second voice coil 42 for driving the second diaphragm 41 to vibrate and generate sound.
The magnetic circuit 1 comprises a bottom plate 11 with a through hole 111, a ring-shaped magnet part 12 fixed on the bottom plate 11, a magnetic steel 13 fixed on the bottom plate 11 and arranged on the outer side of the ring-shaped magnet part 12, and a pole core 14 fixed on the magnetic steel 13, the coaxial loudspeaker 100 further comprises an insert 5 inserted into the inner side of the ring-shaped magnet part 12 from the through hole 111, the magnetic circuit 1 further comprises a first ring-shaped magnet steel 15 sleeved on the insert 5, the first ring-shaped magnet steel 15 comprises an inner surface 151 and an outer surface 152 opposite to the inner surface 151, the magnetic pole of the inner surface 151 is opposite to the magnetic pole of the outer surface 152, the ring-shaped magnet part 12 comprises a second ring-shaped magnet steel 121 fixed on the bottom plate 11, a ring-shaped pole core 122 fixed on the second ring-shaped magnet steel 121 and a third ring-shaped magnet steel 123 fixed on the ring-shaped pole core 122, the second ring-shaped magnet steel 121, the third ring-shaped magnet steel 123 and the magnetic steel 13 vibrate along the first ring-shaped magnet steel 32 and the voice coil 42, the magnetic pole of the ring-shaped magnet steel 123 is close to the outer surface of the ring-shaped magnet steel 152, and the magnetic pole of the ring-shaped magnet steel is opposite to the magnetic pole of the second ring-shaped magnet steel 121 and the magnetic pole of the outer surface 152 has the same polarity.
The first annular magnetic steel 15 and the second annular magnetic steel 121, the annular pole core 122 and the third annular magnetic steel 123 are oppositely arranged at intervals to form a first magnetic gap 101, a second magnetic gap 102 is formed between the magnetic steel 13 and the pole core 14 and the annular magnet part 12, the first voice coil 32 is inserted into the first magnetic gap 101, the second voice coil 42 is inserted into the second magnetic gap 102, the outer periphery 311 of the first diaphragm 31 is fixed on the third annular magnetic steel 123, the outer periphery 411 of the second diaphragm 41 is fixed on the support frame 2, and the inner periphery 412 of the second diaphragm 41 is fixed on the third annular magnetic steel 123.
The pole piece 14 includes a main body portion 141 bonded to the magnetic steel 13 and an extension portion 142 extending from the main body portion 141 in a direction away from the annular magnet portion 12, and the support frame 2 is fixed to the extension portion 142.
The second sound generating unit 4 further includes an elastic supporting member 43 disposed at a distance from the second diaphragm 41, and a skeleton 44 connecting the second diaphragm 41 and the elastic supporting member 43, the extending portions 142 are disposed on two opposite long axis sides of the coaxial speaker 100, the elastic supporting member 43 is disposed on two opposite short axis sides of the coaxial speaker 100, the skeleton 44 includes a flat plate portion 441 and a leg 442 bent and extended from the flat plate portion 441 for fixing the elastic supporting member 43, the flat plate portion 441 is a part of the second diaphragm 41, the leg 442 is disposed between the supporting frame 2 and the pole core 14, an outer fixing portion 43a of the elastic supporting member 43 is fixed on the supporting frame 2, and an inner fixing portion 43b of the elastic supporting member 43 is fixed on the leg 442. Preferably, the first diaphragm 31, the second diaphragm 41 and the skeleton 44 are integrally formed, and at this time, the outer periphery 311 of the first diaphragm 31 and the inner periphery 412 of the second diaphragm 41 are integrally fixed to the third annular magnetic steel 123.
The insert 5 includes a first step portion 51 and a second step portion 52 located on the first step portion 51, the second annular magnetic steel 121 is partially stacked on the first step portion 51, and the first annular magnetic steel 15 abuts against the second step portion 52.
The insert 5 is embedded with a conductive terminal 6 for electrical connection with the first voice coil 32. The elastic support 43 includes a flexible circuit board 431 fixed to the leg 442 for electrical connection with the second voice coil 42 and an auxiliary diaphragm 432 fixed to the bottom surface 4311 of the flexible circuit board 431 remote from the second diaphragm 41.
In the coaxial loudspeaker, the first annular magnetic steel is sleeved on the insert inserted into the inner side of the annular magnet part, the magnetic poles on the inner surface of the first annular magnetic steel are opposite to the magnetic poles on the outer surface of the first annular magnetic steel, the second annular magnetic steel, the annular pole core and the third annular magnetic steel are oppositely arranged at intervals to form a first magnetic gap of the first voice coil, a second magnetic gap of the second voice coil is formed between the magnetic steel, the pole core and the annular magnet part, and the outer periphery of the first vibrating diaphragm and the inner periphery of the second vibrating diaphragm are fixed on the third annular magnetic steel, so that the amplitude of the first sound generating unit can be increased, and meanwhile, the first voice coil is provided with a magnetic field through the first annular magnetic steel, so that the low-frequency performance of the first sound generating unit is improved, the limit that the first sound generating unit can only generate high-frequency sound is broken, and the low-frequency performance of the coaxial loudspeaker is further improved.
While the utility model has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the utility model.
Claims (8)
1. The coaxial loudspeaker comprises a magnetic circuit system, a support frame fixed on the magnetic circuit system, a first sound generating unit and a second sound generating unit coaxially arranged, wherein the second sound generating unit is arranged on the outer side of the first sound generating unit in a surrounding mode, the first sound generating unit comprises a first vibrating diaphragm and a first voice coil driving the first vibrating diaphragm to vibrate and generate sound, the second sound generating unit comprises a second vibrating diaphragm and a second voice coil driving the second vibrating diaphragm to vibrate and generate sound, the coaxial loudspeaker is characterized by comprising a bottom plate with a through hole, an annular magnet part fixed on the bottom plate, magnetic steel fixed on the bottom plate and arranged on the outer side of the annular magnet part, and a pole piece fixed on the magnetic steel, the coaxial loudspeaker further comprises an insert inserted into the inner side of the annular magnet part from the through hole, the magnetic circuit system also comprises a first annular magnetic steel sleeved on the insert, the first annular magnetic steel comprises an inner surface and an outer surface opposite to the inner surface, the magnetic poles of the inner surface are opposite to the magnetic poles of the outer surface, the annular magnet part comprises a second annular magnetic steel fixed on the bottom plate, an annular pole core fixed on the second annular magnetic steel and a third annular magnetic steel fixed on the annular pole core, the first annular magnetic steel, the second annular magnetic steel, the annular pole core and the third annular magnetic steel are oppositely arranged at intervals to form a first magnetic gap, a second magnetic gap is formed between the magnetic steel, the pole core and the annular magnet part, the first voice coil is inserted in the first magnetic gap, the second voice coil is inserted in the second magnetic gap, the outer periphery of the first diaphragm is fixed on the third annular magnetic steel, the outer periphery of the second vibrating diaphragm is fixed on the supporting frame, and the inner periphery of the second vibrating diaphragm is fixed on the third annular magnetic steel.
2. The coaxial loudspeaker of claim 1, wherein the insert comprises a first step and a second step on the first step, the second annular magnetic steel is partially overlapped on the first step, and the first annular magnetic steel is abutted against the second step.
3. The coaxial loudspeaker of claim 1, wherein the insert is embedded with conductive terminals for electrical connection with the first voice coil.
4. The coaxial loudspeaker of claim 1, wherein the pole piece includes a main body portion to which the magnetic steel is attached and an extension portion extending from the main body portion in a direction away from the annular magnet portion, and the support frame is fixed to the extension portion.
5. The coaxial loudspeaker of claim 4, wherein the second sound generating unit further comprises an elastic support member disposed at a distance from the second diaphragm, and a skeleton connecting the second diaphragm and the elastic support member, the extension members are disposed on two opposite long axis sides of the coaxial loudspeaker, the elastic support member is disposed on two opposite short axis sides of the coaxial loudspeaker, the skeleton comprises a flat plate portion and a leg bent and extended from the flat plate portion for fixing the elastic support member, the flat plate portion is a part of the second diaphragm, the leg is disposed between the support frame and the pole piece, an outer fixing portion of the elastic support member is fixed to the support frame, and an inner fixing portion of the elastic support member is fixed to the leg.
6. The coaxial loudspeaker of claim 5, wherein the resilient support includes a flexible circuit board secured to the leg for electrical connection with the second voice coil and an auxiliary diaphragm secured to a bottom surface of the flexible circuit board remote from the second diaphragm.
7. The coaxial loudspeaker of claim 5, wherein the first diaphragm, the second diaphragm, and the armature are integrally formed.
8. The coaxial loudspeaker of claim 1, wherein the second annular magnetic steel, the third annular magnetic steel and the magnetic steel are magnetized along the vibration direction of the first voice coil and the second voice coil, the opposite magnetic poles of the second annular magnetic steel and the third annular magnetic steel have the same polarity and opposite magnetic poles of the outer surface, and the magnetic poles of the magnetic steel close to the pole core have the same polarity as the magnetic poles of the outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320786300.1U CN219659905U (en) | 2023-04-11 | 2023-04-11 | Coaxial loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320786300.1U CN219659905U (en) | 2023-04-11 | 2023-04-11 | Coaxial loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659905U true CN219659905U (en) | 2023-09-08 |
Family
ID=87860413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320786300.1U Active CN219659905U (en) | 2023-04-11 | 2023-04-11 | Coaxial loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659905U (en) |
-
2023
- 2023-04-11 CN CN202320786300.1U patent/CN219659905U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |