A coaxial loudspeaker

Abstract

This disclosure provides a coaxial loudspeaker, comprising: a housing, a loudspeaker unit housed within the housing, and a sound guide channel disposed within the housing; the loudspeaker unit includes a frame, a magnetic circuit system connected to the frame, a first vibration system disposed inside the frame, a second vibration system arranged around the outside of the frame and coaxially with the first vibration system, and a cover disposed on the first vibration system and forming a tweeter front cavity together with the first vibration system; the magnetic circuit system drives the first vibration system to emit high frequencies and drives the second vibration system to emit low frequencies, and both high and low frequencies are led out of the housing through the sound guide channel; the side of the cover facing away from the first vibration system is sealed and fixed to the housing. In this invention, the cover achieves sealing of the tweeter front cavity at the loudspeaker end, thereby simplifying the subsequent assembly process at the BOX (audio) end and improving the process yield; in addition, the cover can provide effective support for the loudspeaker unit.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the field of electroacoustic conversion technology, and specifically relate to a coaxial loudspeaker. Background Technology

[0002] A coaxial loudspeaker is a loudspeaker that integrates a tweeter and a woofer, with the tweeter and woofer positioned coaxially. The sound sources of the tweeter and woofer in a coaxial loudspeaker can be located on the front of the loudspeaker, meaning the two units emit sound in the same direction, or they can be located on opposite sides of the loudspeaker, meaning the two units emit sound in different directions.

[0003] In related technologies, the tweeter front cavity of the tweeter unit of the coaxial loudspeaker is encapsulated through the BOX (audio cabinet), which leads to a complex BOX assembly process and affects the yield rate. In addition, the poor reliability caused by encapsulating the tweeter front cavity through the BOX also needs to be solved.

[0004] Therefore, it is necessary to provide a new coaxial loudspeaker to solve the above-mentioned technical problems. Summary of the Invention

[0005] The embodiments disclosed herein are intended to at least address one of the technical problems existing in the prior art, and to provide a coaxial loudspeaker.

[0006] One aspect of the embodiments of this disclosure provides a coaxial loudspeaker, comprising:

[0007] A housing, a speaker unit housed within the housing, and a sound guiding channel disposed in the housing for discharging sound emitted by the speaker unit from inside the housing to outside the housing;

[0008] The loudspeaker unit includes a frame, a magnetic circuit system connected to the frame, a first vibration system disposed inside the frame, a second vibration system disposed around the outside of the frame and coaxially disposed with the first vibration system, and a cover disposed on the first vibration system and together with the first vibration system forming a tweeter front cavity. The magnetic circuit system drives the first vibration system to emit high frequencies and drives the second vibration system to emit low frequencies. Both the high frequencies and the low frequencies are led out of the housing from the sound guide channel. The side of the cover away from the first vibration system is sealed and fixed to the housing.

[0009] Optionally, the cover includes a top wall connected to the inner wall of the housing and a side wall extending from the top wall toward the basin stand, the cover being connected to the basin stand via the side wall.

[0010] Optionally, the sidewall is recessed from the wall surface near the frame toward the top wall to form a sound transmission port. The sound transmission port connects the tweeter front cavity and the interior of the housing, and is used to guide the high-frequency sound emitted by the first vibration system to the outside of the housing through the sound guide channel.

[0011] Optionally, the inner wall of the housing is provided with a boss that abuts and is fixed to the top wall at a position corresponding to the top wall, and the top wall is provided with a through hole that penetrates its thickness and exposes the boss.

[0012] Optionally, the through hole includes a first through hole and a second through hole spaced apart, wherein the diameter of the first through hole is larger than the diameter of the second through hole.

[0013] Optionally, the magnetic circuit system includes a first magnetic gap and a second magnetic gap located on the outer periphery of the first magnetic gap. The first vibration system includes a first diaphragm and a first voice coil connected to the first diaphragm and used to drive the first diaphragm to vibrate and produce sound. The second vibration system includes a second diaphragm and a second voice coil connected to the second diaphragm and used to drive the second diaphragm to vibrate and produce sound. The first voice coil is at least partially inserted in the first magnetic gap, and the second voice coil is at least partially inserted in the second magnetic gap.

[0014] Optionally, the magnetic circuit system includes a magnetic cup, a central magnetic portion fixed to the magnetic cup, and a side magnetic portion spaced apart from the central magnetic portion, with a second magnetic gap formed between the central magnetic portion and the side magnetic portion; the central magnetic portion includes a magnetic guide plate, a first magnet assembly and a second magnet assembly located on opposite sides of the magnetic guide plate along the vibration direction of the first vibration system, the first magnet assembly being located on the side of the magnetic guide plate facing the first vibration system and forming the first magnetic gap with the magnetic guide plate.

[0015] Optionally, the magnetic guide plate includes a bottom disposed between the first magnet assembly and the second magnet assembly, and a side portion extending from the bottom portion toward the first vibration system; the side portion is spaced apart from the first magnet assembly to form the first magnetic gap.

[0016] Optionally, the loudspeaker unit further includes a perforated shell covering the magnetic circuit system on the side opposite to the first vibration system, and a receiving space for accommodating sound-absorbing material is formed between the perforated shell and the housing.

[0017] Optionally, the cap and the housing are fixed and sealed with adhesive; or foam is provided between the cap and the housing, and the cap is sealed and supported by the foam to the housing.

[0018] The beneficial effects of the embodiments of this disclosure include:

[0019] In this invention, the high-frequency front cavity of the speaker is sealed by the cover, which simplifies the subsequent assembly process of the BOX (audio) end and improves the process yield. In addition, the cover can provide effective support for the speaker unit, improve the reliability of the device, and improve the high-frequency performance stability of the device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a coaxial loudspeaker according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a coaxial loudspeaker from another perspective of an embodiment of the present invention;

[0022] Figure 3 for Figure 2 The cross-sectional view of the coaxial loudspeaker shown in the figure along the AA direction illustrates the positional relationship between the magnetic circuit system, the first vibration system, and the second vibration system.

[0023] Figure 4 for Figure 3 A magnified schematic diagram of part of the coaxial speaker structure shown in region C;

[0024] Figure 5 for Figure 3 A magnified schematic diagram of part of the coaxial speaker structure shown in region D;

[0025] Figure 6 for Figure 2 The cross-sectional view of the coaxial loudspeaker shown in the figure along the BB direction illustrates the positional relationship between the magnetic circuit system, the first vibration system, and the second vibration system.

[0026] Figure 7 for Figure 6 A magnified schematic diagram of part of the coaxial speaker structure shown in region E;

[0027] Figure 8 for Figure 6 A magnified schematic diagram of part of the coaxial speaker structure shown in region F;

[0028] Figure 9 for Figure 1 An exploded perspective view of the coaxial loudspeaker shown.

[0029] Figure 10 This is a schematic diagram of the structure of the cap in one embodiment of the present invention;

[0030] Figure 11 This is an exploded perspective view of the housing according to an embodiment of the present invention;

[0031] Figure 12This is a schematic diagram of the structure of a basin stand according to one embodiment of the present invention;

[0032] Figure 13 This is a schematic diagram of the structure of the second diaphragm in one embodiment of the present invention.

[0033] In the diagram, 100 is the loudspeaker driver; 200 is the housing; 201 is the sound guide channel; 202 is the boss; 1 is the frame; 2 is the magnetic circuit system; 3 is the first vibration system; 4 is the second vibration system; 5 is the cover; 6 is the tweeter front cavity; 7 is the perforated shell; 8 is the receiving space; 9 is the insert; 10 is the support frame; 11 is the elastic component; 12 is the first electrical connector; 13 is the second electrical connector; 14 is the reinforcement; 17 is the filling hole; 21 is the first magnetic gap; 22 is the second magnetic gap; 23 is the magnetic guide plate; 231 is the receiving hole; 232 is the side; 233 is the bottom; 24 is the center magnet; 25 is the center magnet. 1. First magnet assembly; 242. Pole core; 243. Second magnet assembly; 25. Side magnet part; 26. Magnetic cup; 251. Third magnet assembly; 252. Magnetic guide cover plate; 31. First diaphragm; 32. First voice coil; 33. Voice coil connector; 41. Second diaphragm; 42. Second voice coil; 43. Voice coil skeleton; 411. Second surround; 412. Second dome; 413. Third surround; 431. Skeleton plate part; 432. First extension part; 433. Second extension part; 51. Top wall; 52. Side wall; 53. Sound transmission port; 511. First through hole; 512. Second through hole. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed descriptions and accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of this application, but should not be used to limit the scope of this application; that is, this application is not limited to the described embodiments. In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0036] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0037] like Figure 1-8 As shown, a coaxial loudspeaker includes: a housing 200, a loudspeaker unit 100 housed within the housing 200, and a sound guide channel 201 disposed in the housing 200 and used to guide the sound emitted by the loudspeaker unit 100 from inside the housing 200 to outside the housing 200.

[0038] The loudspeaker unit 100 includes a frame 1, a magnetic circuit system 2 connected to the frame 1, a first vibration system 3 disposed inside the frame 1, a second vibration system 4 disposed around the outside of the frame 1 and coaxially disposed with the first vibration system 3, and a cover 5 covering the first vibration system 3 and forming a tweeter front cavity 6 together with the first vibration system 3. The magnetic circuit system 2 drives the first vibration system 3 to emit high frequencies and drives the second vibration system 4 to emit low frequencies. Both high and low frequencies are led out from the sound guide channel 201 to the outside of the housing 200. The side of the cover 5 away from the first vibration system 3 is sealed and fixed to the housing 200.

[0039] In this invention, the sealing of the tweeter front cavity 6 at the speaker end is achieved by the cover 5, thereby simplifying the subsequent assembly process of the BOX (audio) end and improving the process yield. In addition, the cover 5 can provide effective support for the speaker unit 100, improve the reliability of the device, and improve the high-frequency performance stability of the device.

[0040] refer to Figure 10 In some embodiments, the cover 5 includes a top wall 51 connected to the inner wall of the housing 200 and a side wall 52 extending from the edge of the top wall 51 toward the basin stand 1, the cover 5 being connected to the basin stand 1 via the side wall 52.

[0041] In some embodiments, the side wall 52 is recessed from the wall surface near the frame 1 toward the top wall 51 to form a sound transmission port 53. The sound transmission port 53 connects the tweeter front cavity 6 and the interior of the housing 200, and is used to guide the high-frequency sound emitted by the first vibration system 3 to the outside of the housing 200 through the sound guide channel 201.

[0042] In some embodiments, the inner wall of the housing 200 is provided with a boss 202 that abuts and is fixed to the top wall 51, and the top wall 51 is provided with a through hole that penetrates its thickness and exposes the boss 202. See details. Figure 11The housing 200 includes an upper housing 203 and a lower housing 204, with a boss 202 disposed on the surface of the lower housing 204 facing the upper housing 203. A through hole is provided in the top wall 51, penetrating its thickness and exposing the boss 202, which facilitates the positioning of automated tooling and improves assembly accuracy.

[0043] In some implementations, please continue to refer to Figure 10 The through holes include a first through hole 511 and a second through hole 512 spaced apart, with the diameter of the first through hole 511 being larger than the diameter of the second through hole 512. In this application, by providing two unequal-sized first through holes 511 and second through holes 512, a foolproof mechanism can be established.

[0044] In some embodiments, the magnetic circuit system 2 is provided with a first magnetic gap 21 and a second magnetic gap 22 located on the outer periphery of the first magnetic gap 21. The first vibration system 3 includes a first diaphragm 31 and a first voice coil 32 connected to the first diaphragm 31 and used to drive the first diaphragm 31 to vibrate and produce sound. The second vibration system 4 includes a second diaphragm 41 and a second voice coil 42 connected to the second diaphragm 41 and used to drive the second diaphragm 41 to vibrate and produce sound. The first voice coil 32 is at least partially inserted in the first magnetic gap 21, and the second voice coil 42 is at least partially inserted in the second magnetic gap 22.

[0045] refer to Figure 3-4 ,as well as Figure 7-8 In some embodiments, the magnetic circuit system 2 includes a magnetic cup 26, a central magnetic portion 24 fixed to the magnetic cup 26, and a side magnetic portion 25 spaced apart from the central magnetic portion 24, with a second magnetic gap 22 formed between the central magnetic portion 24 and the side magnetic portion 25. The central magnetic portion 24 includes a magnetic guide plate 23, a first magnet assembly 241 and a second magnet assembly 243 located on opposite sides of the magnetic guide plate 23 along the vibration direction of the first vibration system 3, the first magnet assembly 241 being located on the side of the magnetic guide plate 23 facing the first vibration system 3 and forming the first magnetic gap 21 between it and the magnetic guide plate 23.

[0046] In some embodiments, the magnetic plate 23 includes a bottom 233 disposed between the first magnet assembly 241 and the second magnet assembly 243, and a side portion 232 extending from the bottom 233 toward the first vibration system 3, the side portion 232 being spaced from the first magnet assembly 241 to form the first magnetic gap 21.

[0047] For details, please refer to Figure 5 and Figure 8-9The central magnetic section 24 includes a first magnet assembly 241 disposed on the upper surface of the bottom 233 of the magnetic guide plate 23 and a pole core 242 disposed on the upper surface of the first magnet assembly 241. A first magnetic gap 21 is formed between the first magnet assembly 241 and the side portion 232 of the magnetic guide plate 23. The outer edge of the first magnet assembly 241 near the surface of the second vibration system 4 is provided with a cut surface 2411. The side magnetic section 25 includes a third magnet assembly 251 disposed on the outer periphery of the second magnet assembly 243 and forming a second magnetic gap 22 with the second magnet assembly 243, and a magnetic guide cover plate 252 stacked on top of the third magnet assembly 251. The magnetic circuit system 2 also includes a magnetic cup 26 that supports the second magnet assembly 243 and the third magnet assembly 251.

[0048] In some embodiments, the magnetic cup 26 is provided with a clearance recess 261 at the position corresponding to the second voice coil 42, so as to provide sufficient vibration space for the second voice coil 42.

[0049] Furthermore, the first magnet assembly 241, the second magnet assembly 243, and the third magnet assembly 251 are magnetized along the vibration direction of the speaker unit 100, and the first magnet assembly 241 and the second magnet assembly 243 are arranged with the same pole facing each other, that is, the magnetization directions of the first magnet assembly 241 and the second magnet assembly 243 are opposite, and the magnetization directions of the second magnet assembly 243 and the third magnet assembly 251 are opposite. In this embodiment, the first magnet assembly 241, the pole core 242, the second magnet assembly 243, the third magnet assembly 251, and the magnetic guide plate 252 are all hollow annular structures. In some embodiments, the pole core 242 is sandwiched between the frame 1 and the first voice coil 32, and the third magnet assembly 251 is formed by four magnet units axially surrounding the magnetic guide plate 23.

[0050] refer to Figure 9 and Figure 12 The basin frame 1 is a ring structure with an outer perimeter that is roughly rectangular. The basin frame 1 includes an upper ring wall 15 near the cover 5 and a lower ring wall 16 disposed above the first magnet assembly 241.

[0051] In a specific example, along the direction perpendicular to the vibration direction, the width of the upper ring wall 15 is smaller than the width of the lower ring wall 16, and the surfaces of the upper ring wall 15 and the lower ring wall 16 are flush with the surfaces of the first voice coil 32. The first diaphragm 31 is a recessed structure that extends downward along the vibration direction, and the first diaphragm 31 is fitted onto the upper ring wall 15 to achieve a fixed connection between the first diaphragm 31 and the frame 1.

[0052] refer to Figure 9 In some embodiments, the first vibration system 3 further includes a voice coil connector 33 sandwiched between the first voice coil 32 and the first diaphragm 31, the shape of which is adapted to the shape of the first voice coil 32.

[0053] In some embodiments, the second diaphragm 41 includes a second folded ring 411, a second dome 412 surrounding the second folded ring 411, and a third folded ring 413 surrounding the second dome 412. The second folded ring 411 is a structure that protrudes upward along the vibration direction, and the third folded ring 413 is a structure that is recessed downward along the vibration direction. The second diaphragm 41 is used for bass sound generation, and its sound generation direction is upward along the vibration direction.

[0054] In some embodiments, the second vibration system 4 further includes a voice coil skeleton 43 connecting the second diaphragm 41 and the second voice coil 42.

[0055] For details, please refer to Figure 9 and Figure 13 The voice coil frame 43 supports the second surround 411 and the second dome 412 and is connected to the second voice coil 42. The end of the second surround 411 near the first diaphragm 31 is fixed between the lower ring wall 16 of the frame 1 and the first magnet assembly 241, and the outer edge of the third surround 413 includes a third fixing part 4131.

[0056] In some embodiments, the loudspeaker unit 100 further includes a perforated shell 7 covering the magnetic circuit system 2 on the side opposite to the first vibration system 3, and the perforated shell 7 and the housing 200 form a receiving space 8 for receiving sound-absorbing material.

[0057] In some embodiments, the upper shell 203 is provided with a filling hole 17, through which sound-absorbing material is filled into the receiving space 8.

[0058] In some embodiments, the loudspeaker unit 100 further includes an insert 9, a support frame 10, and an elastic component 11. The insert 9 is disposed within a receiving hole 231 formed by the side portion 232 of the magnetic plate 23. The insert 9 is electrically connected to the first voice coil 32 via a first electrical connector 12. The insert 9 has a first terminal extending through it, which is connected to both the first electrical connector 12 and the circuit board, thereby achieving an electrical connection between the first voice coil 32 and the circuit board. The insert 9 also has a leakage channel extending through it.

[0059] Furthermore, the elastic component 11 is disposed between the second diaphragm 41 and the perforated shell 7 and supports the voice coil skeleton 43 and the support frame 10 respectively, and is electrically connected to the second voice coil 42.

[0060] In some embodiments, the support frame 10 is an annular steel ring, and the third fixing part 4131 is a recessed structure that is downward along the vibration direction, and is sleeved on the support frame 10 to achieve a fixed connection between the second diaphragm 41 and the support frame 10.

[0061] Specifically, the elastic component 11 includes a circuit board 111 positioned opposite to the third folding ring 413 and a support diaphragm 112 connected to the circuit board 111. The second voice coil 42 is electrically connected to the circuit board 111 via a second electrical connector 13. The circuit board 111 is sandwiched between the support frame 10 and the perforated shell 7.

[0062] In some embodiments, the loudspeaker unit 100 further includes a reinforcing member 14 disposed at the inner ring bend of the annular support frame 10.

[0063] In some embodiments, there are two elastic components 11, which are arranged in the short axis direction of the speaker unit 100, while in other embodiments, the arrangement may vary.

[0064] The voice coil skeleton 43 is annular and includes a skeleton plate portion 431 that fits against the second dome 412, a first extension portion 432 that bends and extends from the outer ring edge of the skeleton plate portion 431 toward the circuit board 111 and is connected to the circuit board 111, and a second extension portion 433 that bends and extends from the inner ring edge of the skeleton plate portion 431 toward the second voice coil 42 and is connected to the second voice coil 42.

[0065] In some embodiments, the cover 5 is fixed and sealed to the housing 200 by adhesive, or foam is provided between the cover 5 and the housing 200, and the cover 5 is sealed and supported to the housing 200 by the foam.

[0066] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A coaxial loudspeaker, characterized in that, include: A housing formed by assembling an upper shell and a lower shell, a speaker unit housed within the housing, and a sound guide channel disposed in the housing for discharging the sound emitted by the speaker unit from inside the housing to outside the housing; The loudspeaker unit includes a frame, a magnetic circuit system connected to the frame, a first vibration system disposed inside the frame, a second vibration system disposed around the outside of the frame and coaxially disposed with the first vibration system, and a cover disposed on the first vibration system and together with the first vibration system forming a tweeter front cavity. The magnetic circuit system drives the first vibration system to emit high frequencies and drives the second vibration system to emit low frequencies. Both the high frequencies and the low frequencies are led out of the housing from the sound guide channel. The side of the cover away from the first vibration system is sealed and fixed to the housing. The cover includes a top wall connected to the inner wall of the housing and a side wall that bends and extends from the top wall toward the basin stand, and the cover is connected to the basin stand through the side wall; The side wall is recessed from the wall surface near the frame toward the top wall to form a sound transmission port. The sound transmission port connects the tweeter front cavity and the interior of the housing, and is used to guide the high-frequency sound emitted by the first vibration system to the outside of the housing through the sound guide channel. The cap and the housing are fixed and sealed with glue; or foam is provided between the cap and the housing, and the cap is sealed and supported by the foam.

2. The coaxial loudspeaker according to claim 1, characterized in that, The inner wall of the housing is provided with a boss at a position corresponding to the top wall, which abuts and is fixed to the top wall. The top wall is provided with a through hole that penetrates its thickness and exposes the boss.

3. The coaxial loudspeaker according to claim 2, characterized in that, The through hole includes a first through hole and a second through hole arranged at intervals, wherein the diameter of the first through hole is larger than the diameter of the second through hole.

4. The coaxial loudspeaker according to claim 1, characterized in that, The magnetic circuit system is provided with a first magnetic gap and a second magnetic gap located on the outer periphery of the first magnetic gap. The first vibration system includes a first diaphragm and a first voice coil connected to the first diaphragm and used to drive the first diaphragm to vibrate and produce sound. The second vibration system includes a second diaphragm and a second voice coil connected to the second diaphragm and used to drive the second diaphragm to vibrate and produce sound. The first voice coil is at least partially inserted in the first magnetic gap, and the second voice coil is at least partially inserted in the second magnetic gap.

5. The coaxial loudspeaker according to claim 4, characterized in that, The magnetic circuit system includes a magnetic cup, a central magnetic part fixed to the magnetic cup, and a side magnetic part spaced apart from the central magnetic part, with a second magnetic gap formed between the central magnetic part and the side magnetic part; the central magnetic part includes a magnetic guide plate, a first magnet assembly and a second magnet assembly located on opposite sides of the magnetic guide plate along the vibration direction of the first vibration system, the first magnet assembly being located on the side of the magnetic guide plate facing the first vibration system and forming the first magnetic gap with the magnetic guide plate.

6. The coaxial loudspeaker according to claim 5, characterized in that, The magnetic guide plate includes a bottom disposed between the first magnet assembly and the second magnet assembly, and a side portion extending and bending from the bottom toward the first vibration system; the side portion and the first magnet assembly are spaced apart to form the first magnetic gap.

7. The coaxial loudspeaker according to claim 1, characterized in that, The loudspeaker unit also includes a perforated shell covering the magnetic circuit system on the side opposite to the first vibration system, and a receiving space for accommodating sound-absorbing material is formed between the perforated shell and the housing.

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