CN214675665U

CN214675665U - Helmholtz brake chamber horn

Info

Publication number: CN214675665U
Application number: CN202121122808.9U
Authority: CN
Inventors: 刘晓明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-11-09
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a Helmholtz brake cavity loudspeaker, which comprises a bracket body, a vibration sound film, an inner magnet, a magnetic pole plate and a voice coil; the support body comprises an outer support and an inner support, the inner support is arranged in the outer support, a Helmholtz brake cavity is formed between the inner support and the outer support, and a first sound adjusting hole is formed in the inner support; the vibration sound film is arranged on the bracket body; the inner magnet and the magnetic pole plate are overlapped together and fixed in the inner bracket; through setting up the inner support in the outer support, be formed with helmholtz braking cavity between inner support and the outer support, can increase the too big drawback of acoustic damping volume improvement loudspeaker, can balance and restrain inside acoustic resonance atmospheric pressure of loudspeaker cavity and acoustic damping, improve the sound transmission rate of the inside cavity of loudspeaker on acoustic damping and loudspeaker on acoustic material for loudspeaker is using the in-process of vibration sound production, be difficult to produce the instability in acoustics by the change that external cavity changes.

Description

Helmholtz brake chamber horn

Technical Field

The utility model belongs to the technical field of loudspeaker field and specifically relates to indicate a helmholtz braking cavity loudspeaker.

Background

The horn is also called a speaker. It is a very common electroacoustic transducer, and can be found in electronic and electric equipment for producing sound. The loudspeaker is a transducer for converting an electric signal into an acoustic signal, and the quality of the loudspeaker has great influence on the sound quality. The horn is the weakest component in the audio equipment, and is the most important component for the audio effect. The horn is of various kinds and has a large price difference. The audio frequency electric energy makes the paper cone or the diaphragm vibrate and generate resonance (resonance) with the surrounding air through electromagnetic, piezoelectric or electrostatic effect to make sound.

The existing internal acoustic cavity of the loudspeaker only consists of an acoustic internal cavity at the top of a sphere and an acoustic cavity at the edge of a vibrating diaphragm, and in an acoustic tuning link, the volume of existing acoustic tuning damping is small, so that the acoustic damping is too large, and the too large acoustic damping is not beneficial to the expression of timbre. Therefore, there is a need for improvements to the current loudspeakers.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a helmholtz brake cavity speaker, which can effectively solve the problem that the acoustic damping of the speaker is not good for the sound and color performance.

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

a helmholtz brake cavity loudspeaker comprises a bracket body, a vibration sound film, an inner magnet, a magnetic pole plate and a voice coil; the support body comprises an outer support and an inner support, the inner support is arranged in the outer support, a Helmholtz brake cavity is formed between the inner support and the outer support, and a first sound adjusting hole is formed in the inner support; the vibration sound film is arranged on the bracket body; the inner magnet and the magnetic pole plate are overlapped together and fixed in the inner bracket; this voice coil loudspeaker voice coil is fixed with the medial surface of vibration sound membrane, and the voice coil loudspeaker voice coil is located the periphery of interior magnetite and magnetic pole board, and the inboard of voice coil loudspeaker voice coil is formed with interior cavity of ball top acoustics, and the outside of voice coil loudspeaker voice coil forms vibrating diaphragm edge acoustics cavity, and this vibrating diaphragm edge acoustics cavity is through first tuning hole intercommunication helmholtz braking cavity.

Preferably, the bottom of the outer support is provided with a second tuning hole communicated with the helmholtz brake cavity, the bottom of the outer support is fixed with a circuit board, the circuit board is in conduction connection with the voice coil, the circuit board is provided with a through hole, and the through hole is in opposite communication with the second tuning hole.

Preferably, the bottom of the outer support is concavely provided with a concave position, and the circuit board is embedded in the concave position for fixing.

Preferably, the inner support is provided with a first sound guide hole, the inner magnet is provided with a second sound guide hole, the magnetic pole plate is provided with a third sound guide hole, and the first sound guide hole, the second sound guide hole and the third sound guide hole are sequentially communicated and communicated between the acoustic inner cavity of the ball top and the helmholtz brake cavity.

Preferably, the first tuning hole is located at the top periphery of the inner bracket.

Preferably, the first tuning hole is located at the bottom periphery of the inner support.

Preferably, the first tuning hole is formed in the top periphery and the bottom periphery of the inner support.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:

through setting up the inner support in the outer support, be formed with helmholtz braking cavity between inner support and the outer support, can increase the too big drawback of acoustic damping volume improvement loudspeaker, can balance and restrain inside acoustic resonance atmospheric pressure of loudspeaker cavity and acoustic damping, improve the sound transmission rate of the inside cavity of loudspeaker on acoustic damping and loudspeaker on acoustic material for loudspeaker is using the in-process of vibration sound production, be difficult to produce the instability in acoustics by the change that external cavity changes.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a cross-sectional view of a first preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of a second preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of a third preferred embodiment of the present invention;

fig. 4 is a sectional view of a fourth preferred embodiment of the present invention.

The attached drawings indicate the following:

10. bracket body 11, outer bracket

12. Inner support 101 and Helmholtz brake cavity

102. First tuning hole 103 and second tuning hole

104. Concave 105, first leading sound hole

20. Vibration sound film 30 and internal magnet

31. Second sound guide hole 40 and magnetic pole plate

41. Third sound guide hole 50, voice coil

51. Dome acoustic inner cavity 52, diaphragm edge acoustic cavity

60. Wiring board 61, through-hole

Detailed Description

Referring to fig. 1, a specific structure of a first preferred embodiment of the present invention is shown, which includes a support body 10, a diaphragm 20, an inner magnet 30, a magnetic plate 40 and a voice coil 50.

The support body 10 comprises an outer support 11 and an inner support 12, the inner support 12 is arranged in the outer support 11, a Helmholtz braking cavity 101 is formed between the inner support 12 and the outer support 11, the Helmholtz braking cavity 101 is a balance braking annular cavity, and a first sound adjusting hole 102 is formed in the inner support 12; in this embodiment, the first tuning hole 102 is located at the top periphery of the inner housing 12.

The vibration sound membrane 20 is arranged on the bracket body 10, the inner magnet 30 and the magnetic pole plate 40 are overlapped together and fixed in the inner bracket 12; the voice coil 50 is fixed to the inner side surface of the vibrating diaphragm 20, the voice coil 50 is located on the periphery of the inner magnet 30 and the magnetic pole plate 40, a ball-top acoustic inner cavity 51 is formed on the inner side of the voice coil 50, a vibrating diaphragm edge acoustic cavity 52 is formed on the outer side of the voice coil 50, and the vibrating diaphragm edge acoustic cavity 52 is communicated with the helmholtz brake cavity 101 through a first tuning hole 102.

And a second sound adjusting hole 103 communicated with the helmholtz brake cavity 101 is formed in the bottom of the outer support 11, a circuit board 60 is fixed at the bottom of the outer support 11, the circuit board 60 is in conduction connection with the voice coil 50, a through hole 61 is formed in the circuit board 60, the through hole 61 is in opposite communication with the second sound adjusting hole 103, a concave position 104 is concavely formed in the bottom of the outer support 11, the circuit board 60 is fixedly embedded in the concave position 104, the second sound adjusting hole 103 is located in the center of the bottom of the inner support 12, the through hole 61 is located in the center of the circuit board 60, and the inner diameter of the through hole 61 is larger than the inner diameter of the second sound adjusting hole 103.

Referring to fig. 2, a specific structure of a second preferred embodiment of the present invention is shown, the specific structure of this embodiment is basically the same as that of the first preferred embodiment, except that:

in this embodiment, the inner bracket 12 is provided with a first sound guiding hole 105, the inner magnet 30 is provided with a second sound guiding hole 31, the magnetic pole plate 40 is provided with a third sound guiding hole 41, the first sound guiding hole 105, the second sound guiding hole 31 and the third sound guiding hole 41 are sequentially communicated with each other and communicated between the acoustic inner cavity 51 at the top of the ball and the helmholtz brake cavity 101, the first sound guiding hole 105 is located at the center of the bottom of the inner bracket 12, the second sound guiding hole 31 is located at the center of the inner magnet 30, and the third sound guiding hole 41 is located at the center of the magnetic pole plate 40. Through the setting of each sound adjusting hole and each sound guide hole, the internal circulation of the acoustic space in the loudspeaker is realized, and the switching-on of the internal circulation can expand the tone quality of the loudspeaker on high-frequency and extremely high-frequency, so that the higher tone quality expression of the loudspeaker on acoustics is realized.

Referring to fig. 3, a specific structure of a third preferred embodiment of the present invention is shown, the specific structure of this embodiment is basically the same as that of the second preferred embodiment, except that:

in this embodiment, the first tuning hole 102 is located at the bottom periphery of the inner bracket 12.

Referring to fig. 4, a specific structure of a fourth preferred embodiment of the present invention is shown, the specific structure of this embodiment is basically the same as that of the second preferred embodiment, except that:

in this embodiment, the first tuning holes 102 are opened on both the top and bottom peripheries of the inner housing 12.

The utility model discloses a design key is: through setting up the inner support in the outer support, be formed with helmholtz braking cavity between inner support and the outer support, can increase the too big drawback of acoustic damping volume improvement loudspeaker, can balance and restrain inside acoustic resonance atmospheric pressure of loudspeaker cavity and acoustic damping, improve the sound transmission rate of the inside cavity of loudspeaker on acoustic damping and loudspeaker on acoustic material for loudspeaker is using the in-process of vibration sound production, be difficult to produce the instability in acoustics by the change that external cavity changes.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. A Helmholtz brake chamber horn, comprising: comprises a bracket body, a vibration sound film, an inner magnet, a magnetic pole plate and a voice coil; the support body comprises an outer support and an inner support, the inner support is arranged in the outer support, a Helmholtz brake cavity is formed between the inner support and the outer support, and a first sound adjusting hole is formed in the inner support; the vibration sound film is arranged on the bracket body; the inner magnet and the magnetic pole plate are overlapped together and fixed in the inner bracket; this voice coil loudspeaker voice coil is fixed with the medial surface of vibration sound membrane, and the voice coil loudspeaker voice coil is located the periphery of interior magnetite and magnetic pole board, and the inboard of voice coil loudspeaker voice coil is formed with interior cavity of ball top acoustics, and the outside of voice coil loudspeaker voice coil forms vibrating diaphragm edge acoustics cavity, and this vibrating diaphragm edge acoustics cavity is through first tuning hole intercommunication helmholtz braking cavity.

2. The helmholtz brake chamber horn of claim 1 wherein: the bottom of the outer support is provided with a second sound adjusting hole communicated with the Helmholtz brake cavity, the bottom of the outer support is fixed with a circuit board, the circuit board is in conduction connection with the voice coil, the circuit board is provided with a through hole, and the through hole is in opposite communication with the second sound adjusting hole.

3. A helmholtz brake chamber horn according to claim 2 wherein: the bottom of outer support is concavely provided with a concave position, and the circuit board is embedded in the concave position for fixing.

4. The helmholtz brake chamber horn of claim 1 wherein: the inner support is provided with a first sound guide hole, the inner magnet is provided with a second sound guide hole, the magnetic pole plate is provided with a third sound guide hole, and the first sound guide hole, the second sound guide hole and the third sound guide hole are sequentially communicated and communicated between the acoustic inner cavity of the ball top and the Helmholtz brake cavity.

5. The helmholtz brake chamber horn of claim 1 wherein: the first tuning hole is positioned on the periphery of the top of the inner support.

6. The helmholtz brake chamber horn of claim 1 wherein: the first sound adjusting hole is located on the periphery of the bottom of the inner support.

7. The helmholtz brake chamber horn of claim 1 wherein: the top periphery and the bottom periphery of the inner support are both provided with the first tone adjusting holes.