Coaxial Speaker

Abstract

The present invention provides a coaxial speaker. [Solution] The coaxial speaker includes a support ring, a magnetic circuit system, a first vibration system fixed to the inside of the support ring, and a second vibration system provided on the outside of the support ring, wherein the first vibration system is provided coaxially with the second vibration system, the first vibration system includes a first diaphragm and a first voice coil, and the second vibration system includes a second diaphragm and a second voice coil, wherein the first diaphragm is used to generate high-pitched sounds and the second diaphragm is used to generate low-pitched sounds, and the support ring includes a first end fixedly connected to the first diaphragm, a second end fixedly connected to the magnetic circuit system, and a connecting portion connected to the first end along a direction extending outward from the second end, and the projected portions of the first diaphragm and the second diaphragm in the vibration direction of the coaxial speaker overlap each other. In this coaxial speaker, the bass diaphragm and treble diaphragm are molded separately, and the material and thickness of the treble and bass sound film materials can be adjusted separately. The treble diaphragm is designed to utilize the Z-direction vibration space of the bass diaphragm, which increases the vibration area of ​​the diaphragm compared to conventional designs and improves performance.

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 bass speaker unit are integrated and arranged coaxially. The sound sources of the treble speaker unit and the bass speaker unit of a coaxial speaker can be located in front of the coaxial speaker, that is, the sound sources of the two speaker units are the same, or they can be located in front and behind the coaxial speaker, that is, the sound sources of the two speaker units are different.

[0003] In the prior art, the treble speaker unit and the bass speaker unit of the coaxial speaker are located on the same side of the coaxial speaker, and the sound film of the treble unit and the sound film of the bass unit are both pressed with the same material, which makes the product performance simple and difficult to control. In addition, the sound film of the treble unit and the sound film of the bass unit are independent vibration spaces from each other, and the dimensions are limited, which limits the effective vibration area of ​​the diaphragm, resulting in poor performance.

[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 in which the treble and bass diaphragms can be flexibly adjusted and the vibration area of ​​the diaphragm can be increased. [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 provided outside the support ring and surrounding the first vibration system, the first vibration system being provided 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 being fixed to the support ring, the first vibration system being fixed to the support ring, the second vibration system being fixed to the support ring ... The stem has a first magnetic gap and a second magnetic gap located outside the first magnetic gap, the first voice coil is at least partially inserted into the first magnetic gap, the second voice coil is at least partially 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, the support ring includes a first end fixedly connected to the first diaphragm, a second end fixedly connected to the magnetic circuit system, and a connection portion connected to the first end along a direction extending outward from the second end, and the projection portions of the first diaphragm and the second diaphragm in the vibration direction of the coaxial speaker overlap each other.

[0007] Preferably, the first diaphragm includes a first dome, a first surround surrounding the first dome, and a first fixed portion fixedly connected to a first end of the support ring, and the second diaphragm includes a second fixed portion fixed to the support ring and / or the magnetic circuit system, and a second surround bending and extending from the second fixed portion, and the projected portions of the first surround and the second surround in the vibration direction of the coaxial speaker overlap each other.

[0008] Preferably, the second vibration system includes a voice coil bobbin connecting the second diaphragm and the second voice coil, the second diaphragm further including a third surround surrounding the second surround and spaced apart from the second surround, and the voice coil bobbin has one side connected to the second surround and the other side connected to the third surround.

[0009] Preferably, the second surround and the third surround are fixed to the voice coil bobbin by heat press molding integrally with a silicone rubber material, and the second diaphragm is adhesively fixed to the support ring and / or the magnetic circuit system.

[0010] Preferably, the second surround and the third surround are adhesively fixed to the voice coil bobbin, and the second diaphragm is adhesively fixed to the support ring and / or the magnetic circuit system.

[0011] Preferably, the first diaphragm is adhesively fixed to the support ring.

[0012] Preferably, the magnetic circuit system includes a first magnetic steel, a second magnetic steel arranged to surround the outside of the first magnetic steel, a third magnetic steel arranged below the second magnetic steel, a fourth magnetic steel arranged to surround the outside of the third magnetic steel, and a magnetic permeable plate sandwiched between the second magnetic steel and the third magnetic steel, wherein a first magnetic gap is formed between the first magnetic steel and the second magnetic steel, and the second magnetic steel, the magnetic permeable plate, and the third magnetic steel are stacked to form the second magnetic gap between the fourth magnetic steel.

[0013] Preferably, the coaxial speaker includes an insert supporting the first magnet steel, and a first flexible circuit board fixed between the insert and the magnetic circuit system, the first voice coil being electrically connected to the first flexible circuit board, the first flexible circuit board including a positioning portion fixed to the magnetic circuit system, a cantilever extending from the positioning portion, and a joint formed on the cantilever, and a portion of the insert is crimped to the positioning portion.

[0014] Preferably, the first vibration system further includes a support frame connecting the first voice coil and the first flexible circuit board, the support frame including support legs fixed to a joint of the first flexible circuit board, the support frame being provided with a notch, the first voice coil including a lead wire, and the lead wire extending to and fixed to a lower surface of the joint of the first flexible circuit board by the notch.

[0015] Preferably, the insert comprises an extending wall, and a locating portion of the first flexible circuit board is secured to the extending wall. Effect of the Invention

[0016] 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 provided outside the support ring and surrounding the first vibration system, the first vibration system is provided coaxially with the second vibration system, the first vibration system includes a first diaphragm and a first voice coil that is driven to vibrate the first diaphragm to generate sound, the second vibration system includes a second diaphragm and a second voice coil that is driven to vibrate the second diaphragm to generate sound, and the magnetic circuit system includes a first magnetic gear. The coaxial speaker has a cap 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, 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, the support ring includes a first end fixedly connected to the first diaphragm, a second end fixedly connected to the magnetic circuit system, and a connection portion connected to the first end along a direction extending outward from the second end, and projected portions of the first diaphragm and the second diaphragm in the vibration direction of the coaxial speaker overlap each other. 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 to provide high-quality acoustic effects, whereby the bass diaphragm and the treble diaphragm can be designed and molded separately, and the material and thickness of the treble and bass sound film materials can be adjusted separately according to the different characteristics of the bass and treble, making it more flexible during use, and the projection parts of the bass diaphragm and the treble diaphragm in the vibration direction of the coaxial speaker overlap each other, and the treble diaphragm is designed to utilize the Z-direction vibration space of the bass diaphragm, which increases the vibration area of ​​the diaphragm compared with the normal design and improves performance. [Brief description of the drawings]

[0017] 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 a coaxial speaker according to the present invention. [Diagram 2] FIG. 2 is an exploded view of a portion of the coaxial speaker shown in FIG. [Diagram 3] FIG. 3 is an exploded view of another portion of the coaxial speaker shown in FIG. [Figure 4] FIG. 4 is an exploded view of yet another portion 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 perspective view showing some components of the coaxial speaker shown in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA of FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line BB of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be described below 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.

[0019] As shown in Figures 1 to 8, the present invention provides a coaxial speaker 100, which includes a support ring 1, a magnetic circuit system 2 fixed below the support ring 1, a first vibration system 3 fixed inside the support ring 1, a second vibration system 4 fixed outside the support ring 1, a frame 5 supporting the second vibration system 4, an insert 6 supporting a part of the magnetic circuit system 2, a first flexible circuit board 7 fixed to the insert 6, and an elastic assembly 8 fixed to the frame 5, and the second vibration system 4 is surrounded by the outside of the first vibration system 3 and installed coaxially with the first vibration system 3.

[0020] The outer periphery of the support ring 1 is approximately rectangular and has an overall horn shape, and the support ring includes a first end 11, a second end 12 fixedly connected to the magnetic circuit system 2, and a connection portion 13 connected to the first end 11 along a direction extending outward from the second end 12, and the size of the first end 11 is larger than the size of the second end 12.

[0021] The magnetic circuit system 2 includes a first magnet steel 21, a second magnet steel 22 arranged so as to surround the outside of the first magnet steel 21, a third magnet steel 23 arranged below the second magnet steel 22, a fourth magnet steel 24 arranged so as to surround the outside of the third magnet steel 23, a magnetically permeable plate 25 sandwiched between the second magnet steel 22 and the third magnet steel 23, a first magnetic pole core 26 arranged so as to cover the first magnet steel 21, and a fourth magnet steel 24 arranged so as to cover the second magnet steel 22. The magnetic pole core 27 includes a second magnetic pole core 28 provided so as to cover the fourth magnetic steel 24, and a yoke 29 on which the third magnetic steel 23 and the fourth magnetic steel 24 are mounted. A first magnetic gap 201 is formed between the first magnetic steel 21 and the first magnetic pole core 26 and the second magnetic steel 22 and the second magnetic pole core 27. The second magnetic steel 22, the magnetic permeable plate 25, and the third magnetic steel 23 are laminated to form the second magnetic gap 202 between the fourth magnetic steel 24 and the third magnetic pole core 28. The second magnetic gap 202 is provided outside the first magnetic gap 201.

[0022] The first magnet steel 21, the second magnet steel 22, the third magnet steel 23, and the fourth magnet steel 24 are magnetized along the vibration direction of the coaxial speaker 100, and the magnetization directions of the first magnet steel 21 and the second magnet steel 22 are opposite to each other, the magnetization directions of the second magnet steel 22 and the third magnet steel 23 are opposite to each other, and the magnetization directions of the third magnet steel 23 and the fourth magnet steel 24 are opposite to each other. In this embodiment, the second magnet steel 22, the third magnet steel 23, the fourth magnet steel 24, the magnetic permeable plate 25, the second magnetic pole core 27, the third magnetic pole core 28, and the yoke 29 all have a hollow ring structure, and the fourth magnet steel 24 may be a separate type magnet steel.

[0023] The first vibration system 3 includes a first diaphragm 31, a first voice coil 32 that drives the first diaphragm 31 to vibrate and generate a sound, and a support frame 33 that supports the first voice coil 32, and at least a portion of the first voice coil 32 is inserted into the first magnetic gap 201. The first diaphragm 31 is an integrated diaphragm and can be manufactured by a normal film lamination method. The first diaphragm 31 is used to generate high-pitched sounds, and the sound generation direction is upward along the vibration direction, that is, the sound is generated from the front of the coaxial speaker 100. The first diaphragm 31 includes a first dome 311, a first surround 312 that is provided to surround the first dome 311, and a first fixing part 313 that is fixedly connected to the first end 11 of the support ring 1, and the first fixing part 313 is attached and fixed to the upper surface of the first end 11. The first dome 311, the first surround 312, and the first fixing portion 313 may be integrally formed of materials such as silica gel, rubber, polyether ether ketone (PEEK), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), etc. The first diaphragm 31 is adhesively fixed to the first end 11 of the support ring 1.

[0024] The first voice coil 32 includes a lead wire 321 .

[0025] The support frame 33 includes a support portion 331 that supports the first voice coil 32 and a support leg 332 that is located at the bottom of the support frame 33 , and the support frame 33 is provided with a notch 333 .

[0026] 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, and a voice coil bobbin 43 that connects the second diaphragm 41 and the second voice coil 42, and the second diaphragm 41 is located below the first diaphragm 31, i.e., the second diaphragm 41 is closer to the yoke 29 than the first diaphragm 31, at least a portion of the second voice coil 42 is inserted into the second magnetic gap 202, and the second diaphragm 41 is used to generate low-pitched sounds, and the sound generation direction is upward along the vibration direction, i.e., sound is generated from the front of the coaxial speaker 100. The second diaphragm 41 includes a second fixing portion 411 fixed to the support ring 1 and / or the magnetic circuit system 2, a second surround 412 bent and extending from the second fixing portion 411, a third surround 413 surrounding the second surround 412 and spaced apart from the second surround 412, and a third fixing portion 414 extending from a side of the third surround 413 away from the second surround 412. One side of the voice coil bobbin 43 is connected to the second surround 412, and the other side is connected to the third surround 413. The second fixing portion 411 is bonded and fixed to an upper surface of the second magnet steel 22, and / or the second fixing portion 411 is bonded and fixed to an outer surface of the second end 12 of the support ring 1.

[0027] The second fixing portion 411, the second surround 412, the third surround 413, and the third fixing portion 414 are fixed integrally to the voice coil bobbin 43 by heat press molding using a silicone rubber material, and then the entire second diaphragm 41 is adhesively fixed to the support ring 1 and / or the second magnet steel 22. Alternatively, the second fixing portion 411, the second surround 412, the third surround 413, and the third fixing portion 414 are adhesively fixed to the voice coil bobbin 43, and then the entire second diaphragm 41 is adhesively fixed to the support ring 1 and / or the second magnet steel 22.

[0028] The projected portions of the first diaphragm 31 and the second diaphragm 41 in the vibration direction of the coaxial speaker 100 overlap each other. Specifically, the projected portions of the first surround 312 and the second surround 412 in the vibration direction of the coaxial speaker 100 overlap each other. As a result, the first diaphragm 31 occupies a part of the space in the Z axis of the second diaphragm 41, i.e., in the vertical vibration direction of the coaxial speaker 100, and the vibration space of the first diaphragm 31 and the second diaphragm 41 is expanded within the limited dimensions, thereby improving the acoustic performance of the coaxial speaker 100.

[0029] In order to provide a sufficient vibration space for the second voice coil 42, an avoidance recess 291 is provided in a portion of the yoke 29 corresponding to the second voice coil 42.

[0030] The frame 5 has a hollow ring structure, and the third fixing portion 414 of the second diaphragm 41 is attached and fixed to the upper surface of the frame 5 and also bends and extends to cover a part of the outer surface of the frame 5 .

[0031] The insert 6 supports the first magnet steel 21 and the first pole core 26, and the insert 6 has extending walls 61 symmetrically disposed on both sides.

[0032] The first flexible circuit board 7 is fixed between the insert 6 and the magnetic circuit system 2, the first voice coil 32 is electrically connected to the first flexible circuit board 7, and the first flexible circuit board 7 includes a positioning portion 71 fixed to the third magnet steel 23 of the magnetic circuit system 2, a cantilever 72 extending from the positioning portion 71, and a joint portion 73 formed on the cantilever 72. The extension wall 61 of the insert 6 is pressed against the middle portion of the positioning portion 71, and the positioning portion 71 is attached and fixed to the lower surface of the third magnet steel 23. The positioning portions 71 are installed opposite each other along the longitudinal direction, and there are two of them in number, and two cantilevers 72 extend from each positioning portion 71, and the cantilevers 72 facing each other at the two positioning portions 71 extend opposite each other and are connected to the joint portion 73. The support legs 332 of the support frame 33 are supported on the upper surface of the joint 73 of the first flexible circuit board 7, and the lead wire 321 of the first voice coil 32 extends to the lower surface of the joint 73 of the first flexible circuit board 7 and is fixed by the notch 333.

[0033] An elastic assembly 8 connects the voice coil bobbin 43 and the frame 5, and the elastic assembly 8 includes a second flexible circuit board 81 and a supporting diaphragm 82 connected to the second flexible circuit board 81, and the second voice coil 42 is electrically connected to the second flexible circuit board 81. In this embodiment, the number of elastic assemblies 8 is two, and they are arranged in the minor axis direction of the coaxial speaker 100, and in other embodiments, the number can be determined according to circumstances.

[0034] The voice coil bobbin 43 includes a bobbin flat plate portion 431, a first extension portion 432 that is bent and extends from the bobbin flat plate portion 431 toward the second flexible circuit board 81 and is connected to the second flexible circuit board 81, and a second extension portion 433 that is bent and extends from the bobbin flat plate portion 431 toward the second voice coil 42 and is connected to the second voice coil 42. One side of the bobbin flat plate portion 431 is connected to the second surround 412, and the other side is connected to the third surround 413.

[0035] 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 provided outside the support ring and surrounding the first vibration system, the first vibration system is provided coaxially with the second vibration system, the first vibration system includes a first diaphragm and a first voice coil that is driven to vibrate the first diaphragm to generate sound, the second vibration system includes a second diaphragm and a second voice coil that is driven to vibrate the second diaphragm to generate sound, and the magnetic circuit system includes a first magnetic gear. The coaxial speaker has a cap 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, 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, the support ring includes a first end fixedly connected to the first diaphragm, a second end fixedly connected to the magnetic circuit system, and a connection portion connected to the first end along a direction extending outward from the second end, and projected portions of the first diaphragm and the second diaphragm in the vibration direction of the coaxial speaker overlap each other. 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 to provide high-quality acoustic effects, whereby the bass diaphragm and the treble diaphragm can be designed and molded separately, and the material and thickness of the treble and bass sound film materials can be adjusted separately according to the different characteristics of the bass and treble, making it more flexible during use, and the projection parts of the bass diaphragm and the treble diaphragm in the vibration direction of the coaxial speaker overlap each other, and the treble diaphragm is designed to utilize the Z-direction vibration space of the bass diaphragm, which increases the vibration area of ​​the diaphragm compared with the normal design and improves performance.

[0036] 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. 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 provided outside the support ring and surrounding the first vibration system, the first vibration system being provided coaxially with the second vibration system, the first vibration system including a first diaphragm and a first voice coil that is driven to vibrate the first diaphragm to generate sound, the second vibration system including a second diaphragm and a second voice coil that is driven to vibrate the second diaphragm to generate sound, the magnetic circuit system including a first magnetic gap and the first magnetic and a second magnetic gap located outside the gap, at least a portion of the first voice coil is inserted into the first magnetic gap, 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, the support ring includes a first end fixedly connected to the first diaphragm, a second end fixedly connected to the magnetic circuit system, and a connection portion connected to the first end along a direction extending outward from the second end, and projected portions of the first diaphragm and the second diaphragm in the vibration direction of the coaxial speaker overlap each other. A coaxial speaker characterized by:

2. the first diaphragm includes a first dome, a first surround surrounding the first dome, and a first fixed portion fixedly connected to a first end of the support ring, the second diaphragm includes a second fixed portion fixed to the support ring and / or the magnetic circuit system, and a second surround bending and extending from the second fixed portion, and projected portions of the first surround and the second surround overlap each other in the vibration direction of the coaxial speaker.

2. A coaxial speaker according to claim 1.

3. the second vibration system includes a voice coil bobbin connecting the second diaphragm and the second voice coil, the second diaphragm further includes a third surround surrounding the second surround and spaced apart from the second surround, one side of the voice coil bobbin being connected to the second surround and the other side of the voice coil bobbin being connected to the third surround; 3. A coaxial speaker according to claim 2.

4. the second surround and the third surround are integrally fixed to the voice coil bobbin by heat press molding using a silicone rubber material, and the second diaphragm is adhesively fixed to the support ring and / or the magnetic circuit system.

4. A coaxial speaker according to claim 3.

5. the second surround and the third surround are adhesively fixed to the voice coil bobbin, and the second diaphragm is adhesively fixed to the support ring and / or the magnetic circuit system.

4. A coaxial speaker according to claim 3.

6. The first diaphragm is adhesively fixed to the support ring.

3. A coaxial speaker according to claim 2.

7. The magnetic circuit system includes a first magnetic steel, a second magnetic steel provided so as to surround the outside of the first magnetic steel, a third magnetic steel provided below the second magnetic steel, a fourth magnetic steel provided so as to surround the outside of the third magnetic steel, and a magnetic permeable plate sandwiched between the second magnetic steel and the third magnetic steel, and a first magnetic gap is formed between the first magnetic steel and the second magnetic steel, and the second magnetic steel, the magnetic permeable plate, and the third magnetic steel are stacked to form the second magnetic gap between the fourth magnetic steel.

2. A coaxial speaker according to claim 1.

8. The coaxial speaker includes an insert supporting the first magnet steel, and a first flexible circuit board fixed between the insert and the magnetic circuit system, the first voice coil being electrically connected to the first flexible circuit board, the first flexible circuit board including a positioning portion fixed to the magnetic circuit system, a cantilever extending from the positioning portion, and a joint formed on the cantilever, and a portion of the insert is crimped to the positioning portion.

2. A coaxial speaker according to claim 1.

9. the first vibration system further includes a support frame connecting the first voice coil and the first flexible circuit board, the support frame including support legs fixed to a joint of the first flexible circuit board, the support frame being provided with a notch, the first voice coil including a lead wire, the lead wire extending to a lower surface of the joint of the first flexible circuit board and fixed to the notch; 9. A coaxial speaker according to claim 8.

10. The insert has an extending wall, and a positioning portion of the first flexible circuit board is fixed to the extending wall.

9. A coaxial speaker according to claim 8.

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