CN209105438U - Low frequency miniature moving-coil type loudspeaker - Google Patents

Low frequency miniature moving-coil type loudspeaker Download PDF

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Publication number
CN209105438U
CN209105438U CN201822179615.1U CN201822179615U CN209105438U CN 209105438 U CN209105438 U CN 209105438U CN 201822179615 U CN201822179615 U CN 201822179615U CN 209105438 U CN209105438 U CN 209105438U
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China
Prior art keywords
magnetic
vibrating membrane
low frequency
annular magnet
voice coil
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CN201822179615.1U
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Chinese (zh)
Inventor
杨嘉伟
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GUANGZHOU LIWEI ELECTRONICS CO Ltd
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GUANGZHOU LIWEI ELECTRONICS CO Ltd
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Abstract

The utility model provides a kind of low frequency miniature moving-coil type loudspeaker comprising shell, magnetic circuit unit and driving unit.Shell is cylindrical shape, consequently facilitating filling in ear canal;Magnetic circuit unit includes annular magnet and magnetic conductive part, and annular magnet is embedding in the shell, and magnetic conductive part constitutes magnetic field together with annular magnet.Driving unit includes vibrating membrane and voice coil, and the inner wall of vibrating membrane and shell connects, and one end of voice coil is deep into magnetic field, and the other end is connect with vibrating membrane.It is passed through electric current to voice coil, so that voice coil drives vibrating membrane vibration so that loudspeaker makes a sound under the influence of a magnetic field.Vibrating membrane and high-tension voice coil form softer driving unit by way of physical connection, to create prerequisite to provide more good low-frequency sound;Also, magnetic conductive part and annular magnet constitute excellent magnetic circuit system.Above-mentioned design enables moving-coil type magnet to provide good middle bass, and sound clarity is bright.

Description

Low frequency miniature moving-coil type loudspeaker
Technical field
The utility model relates to stereo set fields, in particular to a kind of low frequency miniature moving-coil type loudspeaker.
Background technique
Under normal circumstances, In-Ear Headphones/hearing aid is all to be obtained using high performance dynamic iron loudspeaker unit preferably Medium-high frequency, but dynamic iron loudspeaker unit, in addition to manufacturing process complexity, manufacturing cost is expensive, its main feature is that medium-high frequency performance is superior but low Frequency is unsatisfactory always.
Utility model content
The purpose of this utility model is to provide a kind of low frequency miniature moving-coil type loudspeakers, are capable of providing more high-quality Low-frequency sound.
The utility model is realized in this way:
A kind of low frequency miniature moving-coil type loudspeaker, including shell, magnetic circuit unit and driving unit,
The shell includes cylinder, and the cylinder includes first end and second end;
The magnetic circuit unit includes annular magnet and magnetic conductive part, and the annular magnet installation is in the housing, and described Shell coaxial arrangement;
The magnetic conductive part includes to conducting magnetic column and magnetic conductive board, and an end face of the magnetic conductive board and the annular magnet is supported It connects, the conducting magnetic column is connect with the magnetic guiding loop, and between protruding into the inner hole of the annular magnet and being formed the annular magnet Gap;
The driving unit includes vibrating membrane and voice coil, and the edge of the vibrating membrane is connect with the inner wall of the shell;Institute The one end for stating voice coil is connect with the vibrating membrane, and the other end is extend between annular magnet and the conducting magnetic column.
Further,
The magnetic circuit unit further includes magnetic guiding loop, the magnetic guiding loop and end face of the annular magnet far from the magnetic conductive board Cooperation.
Further,
It further include protective cover, the protective cover is connect with the first end of the cylinder, and covers the vibrating membrane;It is described anti- Protecting cover and the voice coil are located at the two sides of the vibrating membrane;Through-hole is provided on the protective cover.
Further,
It further include protective cover, the protective cover is connect with the first end of the cylinder, and is covered on the vibrating membrane;It is described Through-hole is provided on protective cover.
Further,
The protective cover is stainless steel steel lid.
Further,
The shell further includes baffle, and the baffle is connect with the second end of the cylinder;The magnetic conductive board and the gear Plate abuts.
Further,
It is provided with through-hole on the baffle, the magnetic conductive board and the conducting magnetic column, the baffle, the magnetic conductive board and leads Through-hole in magnetic pole is mutually communicated.
Further,
It further include wiring board, the wiring board is fitted and connected with the baffle, and is electrically connected with the voice coil;The route Through-hole is provided on plate.
Further,
The vibrating membrane is copper ring vibrating membrane.
Further,
The outer diameter of the voice coil is less than 2mm, and the voice coil uses line footpath in the high-tension copper wire of 0.02-0.03mm.
Further,
The diaphragm face is covered with one layer of graphene
The beneficial effects of the utility model are:
The low frequency miniature moving-coil type loudspeaker that the utility model obtains by above-mentioned design, vibrating membrane and high-tension voice coil Softer driving unit is formed by way of physical connection, to create elder generation to provide more good low-frequency sound Certainly condition;Also, magnetic conductive part and annular magnet constitute excellent magnetic circuit system.It is excellent that above-mentioned design enables moving-coil type magnet to provide The middle bass of matter, sound clarity are bright.
Detailed description of the invention
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts, It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 is the cross-sectional view of loudspeaker provided by the embodiment of the utility model;
Fig. 2 is 4.5mm moving-coil speaker provided in this embodiment and 4.0mm moving iron loud speaker part frequency response in the prior art Curve comparison figure;
Fig. 3 is 4.0mm moving iron loud speaker part frequency response curve figure in the prior art.
Icon: 1- loudspeaker;2- shell;3- annular magnet;4- conducting magnetic column;5- magnetic conductive board;6- magnetic guiding loop;7- vibrating membrane; 8- voice coil;9- protective cover;10- baffle;11- wiring board.
Specific embodiment
It is practical below in conjunction with this to keep the purposes, technical schemes and advantages of the utility model embodiment clearer The technical solution in the utility model embodiment is clearly and completely described in attached drawing in novel embodiment, shows So, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.It is practical based on this Embodiment in novel, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment is fallen within the protection scope of the utility model.
Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below and is wanted The scope of the utility model of protection is sought, but is merely representative of the selected embodiment of the utility model.Based on the utility model In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts Mode is fallen within the protection scope of the utility model.
In the description of the present invention, it should be understood that indicating position or the term of positional relationship are based on attached drawing Shown in orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion institute The equipment or element of finger must have a particular orientation, is constructed and operated in a specific orientation, therefore should not be understood as to this reality With novel limitation.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral;It can be Mechanical connection, is also possible to be electrically connected;It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area Divide description, is not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical", " pendency " are not offered as requiring component abswolute level or pendency, and It is that can be slightly tilted.It is not to indicate the structure if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical" It has to fully horizontally, but can be slightly tilted.
In the present invention unless specifically defined or limited otherwise, fisrt feature is on or below second feature It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it Between other characterisation contact.Moreover, fisrt feature is on second feature, top and above include fisrt feature the Right above two features and oblique upper, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature is in the second spy Under sign, lower section and fisrt feature included below be directly below and diagonally below the second feature, or be merely representative of fisrt feature level Height is less than second feature.
Embodiment:
Referring to FIG. 1, present embodiments providing a kind of low frequency miniature moving-coil type loudspeaker 1 comprising shell 2, magnetic circuit list Member and driving unit.Shell 2 is cylindrical shape, consequently facilitating filling in ear canal;Magnetic circuit unit includes annular magnet 3 and magnetic conductive part, ring For shape magnet 3 in shell 2, magnetic conductive part constitutes magnetic field with annular magnet 3 together.Driving unit includes vibrating membrane 7 and voice coil 8, Vibrating membrane 7 is connect with the inner wall of shell 2, and one end of voice coil 8 is deep into magnetic field, and the other end is connect with vibrating membrane 7.To voice coil 8 It is passed through electric current, so that voice coil 8 drives the vibration of vibrating membrane 7 so that loudspeaker 1 makes a sound under the influence of a magnetic field.
Specifically, with continued reference to FIG. 1, the generally revolving body of shell 2, including cylinder interconnected and baffle 10;Circle Cylinder includes first end and second end, and baffle 10 is connect with the second end of cylinder, and the middle part is provided with through-holes.Cylinder inner wall is close to Stop collar is additionally provided at one end.
Magnetic circuit unit includes annular magnet 3 and magnetic conductive part, annular magnet 3 be arranged in shell 2 stop collar and baffle 10 it Between, it is coaxially disposed with cylinder.Magnetic conductive part includes conducting magnetic column 4 and magnetic conductive board 5 interconnected, the longitudinal direction of conducting magnetic column 4 and magnetic conductive board 5 Section is T-type;Wherein magnetic conductive board 5 is arranged between baffle 10 and annular magnet 3, and conducting magnetic column 4 extend into the interior of annular magnet 3 Kong Zhong.In addition, magnetic circuit unit further includes magnetic guiding loop 6, magnetic guiding loop 6 is arranged between stop collar and annular magnet 3;6 He of magnetic guiding loop Magnetic conductive board 5 cooperates with two end faces of annular magnet 3 respectively.In the present embodiment, above-mentioned annular magnet 3 uses neodymium-iron-boron Iron;And the through-hole axially extending along conducting magnetic column 4 is provided on magnetic conductive board 5 and conducting magnetic column 4.
Driving unit includes vibrating membrane 7 and voice coil 8 interconnected, vibrating membrane 7 with a thickness of 0.02-0.05mm, material Matter is softer, and the surface of vibrating membrane 7 is also covered with one layer of graphene carbon element, to ensure that the rigidity of vibrating membrane 7;So that Vibrating membrane 7 is able to bear bigger operating voltage, is unlikely to deform or punctures.In addition, adjusting the stiffness and vibration of its vibrating membrane 7 The rigidity and quality of film 7 therefrom obtain more matched vibrating diaphragm elasticity modulus, optimize loudspeaker 1F0 (resonant frequency), to be promoted Low Medium Frequency creates prerequisite.
Voice coil 8 uses high-tension copper wire, and wire diameter control ensure that driving unit is vibrating between 0.02mm-0.03mm Service life in work, copper wire are not easily broken that voice coil 8 is avoided to fail.
Loudspeaker 1 provided in this embodiment further includes protecting cover, and protecting cover is embedded the first end in cylinder, for protecting vibrating membrane 7;Through-hole is provided on protecting cover, the outflow for sound.In addition, the outer surface of baffle 10 also sets up and is additionally provided with wiring board 11, the middle part of wiring board 11 is provided with through-hole.Through-hole on wiring board 11, baffle 10, magnetic conductive board 5 and conducting magnetic column 4 penetrates through.
2 outer diameter of shell of the microspeaker 1 is less than 4.5mm, can control by outer packing and is less than in outer diameter 5.5mm left and right.And the external auditory canal diameter of common people is about 7mm or so, so money microspeaker 1 can be placed in completely In human body external auditory canal, increase the concealment and small sense of product appearance, while it is understood that the impression of acoustic low-pass is got over close to people Body skin and human body non-sensitive part (external auditory canal) can be stronger, simultaneously as the sensitivity for being placed in loudspeaker 1 in external auditory canal is directed toward In the self-evident complete set of point, the innervation of sound and the clarity of intermediate frequency also obtain perfect performance.The shell 2 and the mesoporous An independent cavity is collectively formed in wiring board 11 and the magnetic circuit system B and driving unit A, by adjusting the mesoporous We can obtain the sound quality requirement of different clients crowd to the mesh number of the mesoporous internal diameter of wiring board 11 and adjustable sound paper, to meet The demand of all kinds of consumer groups.
The working principle of low frequency miniature moving-coil type loudspeaker 1 provided by the utility model is as follows:
Loudspeaker 1 is connect by wiring board 11 with external signal line, and signal wire provides corresponding signal electricity to loudspeaker 1 Stream;Wiring board 11 delivers current on voice coil 8, since the electric current on voice coil 8 is variation, voice coil 8 is received from magnetic Field force is so as to of reciprocating vibration.The vibration of voice coil 8 drives vibrating membrane 7 to vibrate, to generate sound.
If magnetic circuit unit uses inner magnetic structure, when 8 internal diameter of voice coil is smaller, such as when between 1.2-2.2mm, interior magnetic knot Magnet in structure is difficult to form, i.e., magnetic flux required by enabled molding microspeaker 1 is also much not achieved, and voice coil 8 are easy to bump against magnet and cause noise;And in the present embodiment, loudspeaker 1 is placed in voice coil 8 using high-performance ring shaped magnet 3 But this problem is readily solved among magnet.Increase annular magnetic conductive board 5 on annular magnet 3 simultaneously and increases among voice coil 8 Add a T iron conducting magnetic column 4, the magnetic energy product and coercivity of magnetic circuit unit is more effectively improved, to meet driving unit Driving force.
2 outer diameter of shell of the microspeaker 1 is less than 4.5mm, can control by outer packing and is less than in outer diameter 5.5mm left and right.And the external auditory canal diameter of common people is about 7mm or so, so money microspeaker 1 can be placed in completely In human body external auditory canal, increase the concealment and small sense of product appearance, at the same the impression of acoustic low-pass more close to human skin and Human body non-sensitive part (external auditory canal) can it is stronger, simultaneously as be placed in loudspeaker 1 in external auditory canal sensitivity be directed toward point do not say and It explains in complete set, the innervation of sound and the clarity of intermediate frequency also obtain perfect performance.The shell 2 and the mesoporous wiring board 11 An independent cavity is collectively formed with the magnetic circuit unit and the driving unit, by adjusting the mesoporous wiring board 11 We can obtain the sound quality requirement of different clients crowd to the mesh number of mesoporous internal diameter and adjustable sound paper, to meet all kinds of consumers The demand of group.
Fig. 2 is 4.5mm moving-coil speaker 1 provided in this embodiment and the frequency of 1 part of 4.0mm moving iron loud speaker in the prior art Ring curve comparison figure;Fig. 3 is 1 part frequency response curve figure of 4.0mm moving iron loud speaker in the prior art.
By Fig. 2 and Fig. 3 it is found that 1.) existing 4.0mm moving iron loud speaker 1F0 frequency is in 1000Hz, and in the present embodiment The F0 frequency of 4.5mm moving-coil speaker 1 resonant frequency of moving-coil speaker 1 in 500Hz or so, the present embodiment reduces closely 500Hz;2.) existing 4.0mm moving iron loud speaker 120Hz to 3KHz is always it may be said that relatively more flat perseverance, high frequency points show 4.5KHz Left and right, the sensitivity at the place 4.5KHz is close to 92db, it may be said that medium-high frequency performance is also possible, and sound relative performance relatively gives birth to Firmly, consumption guest proper for doing the driving unit of hearing aid etc., being had damage suitable for some hearing;3.) and The sensitivity in this region at 150Hz-2KHz of 4.5mm moving-coil speaker 1 is apparently higher than the nearly 5db or more of 4.0 moving iron loud speaker 1; The obvious iron loudspeaker more dynamic than 4.0 of 4.5mm moving-coil speaker 1 have been decayed many at 3KHz-10kHz;4.) people can be placed in Under conditions of in external ear canal, 4.5mm moving-coil speaker 1 is still substantially better than 4.0 moving iron loud speakers 1 in Low Medium Frequency sound, thorn The sharp high frequency white noise of have sharp ears is also significantly lower than 4.0 moving iron loud speakers 1, obviously superior from the mildness and wear comfort of sound In moving iron loud speaker 1;To bring better experience to more multi-level consumption guest.
The foregoing is merely the preferred embodiments in this present embodiment, are not limited in this present embodiment, For those skilled in the art, there can be various modifications and variations in this present embodiment.It is all in this present embodiment Within spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the protection model in this present embodiment Within enclosing.

Claims (9)

1. a kind of low frequency miniature moving-coil type loudspeaker, which is characterized in that including shell, magnetic circuit unit and driving unit,
The shell includes cylinder, and the cylinder includes first end and second end;
The magnetic circuit unit includes annular magnet, magnetic conductive part and magnetic guiding loop, and the annular magnet is installed in the housing, with institute State shell coaxial arrangement;The magnetic guiding loop and the annular magnet cooperate far from the end face of the magnetic conductive board;
The magnetic conductive part includes to conducting magnetic column and magnetic conductive board, and the magnetic conductive board is abutted with an end face of the annular magnet, institute It states conducting magnetic column to connect with the magnetic guiding loop, and protrudes into the inner hole of the annular magnet and form gap with the annular magnet;
The driving unit includes vibrating membrane and voice coil, and the edge of the vibrating membrane is connect with the inner wall of the shell;The sound One end of circle is connect with the vibrating membrane, and the other end is extend between annular magnet and the conducting magnetic column.
2. low frequency miniature moving-coil type loudspeaker according to claim 1, it is characterised in that:
It further include protective cover, the protective cover is connect with the first end of the cylinder, and covers the vibrating membrane;The protective cover It is located at the two sides of the vibrating membrane with the voice coil;Through-hole is provided on the protective cover.
3. low frequency miniature moving-coil type loudspeaker according to claim 2, it is characterised in that: the protective cover is stainless steel steel Lid.
4. low frequency miniature moving-coil type loudspeaker according to claim 1, it is characterised in that:
The shell further includes baffle, and the baffle is connect with the second end of the cylinder;The magnetic conductive board is supported with the baffle It connects.
5. low frequency miniature moving-coil type loudspeaker according to claim 4, it is characterised in that: the baffle, the magnetic conductive board With through-hole is provided on the conducting magnetic column, the through-hole on the baffle, the magnetic conductive board and conducting magnetic column is mutually communicated.
6. low frequency miniature moving-coil type loudspeaker according to claim 4, it is characterised in that: it further include wiring board, the line Road plate is fitted and connected with the baffle, and is electrically connected with the voice coil;Through-hole is provided on the wiring board.
7. low frequency miniature moving-coil type loudspeaker according to claim 1, it is characterised in that: the vibrating membrane is copper ring vibration Film.
8. low frequency miniature moving-coil type loudspeaker according to claim 1, it is characterised in that: the outer diameter of the voice coil is less than 2mm, the voice coil include high-tension copper wire of the line footpath in 0.02-0.03mm.
9. low frequency miniature moving-coil type loudspeaker according to claim 1, it is characterised in that: the diaphragm face is covered with One layer of graphene.
CN201822179615.1U 2018-12-24 2018-12-24 Low frequency miniature moving-coil type loudspeaker Active CN209105438U (en)

Priority Applications (1)

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CN201822179615.1U CN209105438U (en) 2018-12-24 2018-12-24 Low frequency miniature moving-coil type loudspeaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822179615.1U CN209105438U (en) 2018-12-24 2018-12-24 Low frequency miniature moving-coil type loudspeaker

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021093696A1 (en) * 2019-11-11 2021-05-20 希联电子香港有限公司 Reverse miniature loudspeaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021093696A1 (en) * 2019-11-11 2021-05-20 希联电子香港有限公司 Reverse miniature loudspeaker

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