CN209593750U - A kind of magnetostriction miniature loudspeaker - Google Patents
A kind of magnetostriction miniature loudspeaker Download PDFInfo
- Publication number
- CN209593750U CN209593750U CN201920486538.6U CN201920486538U CN209593750U CN 209593750 U CN209593750 U CN 209593750U CN 201920486538 U CN201920486538 U CN 201920486538U CN 209593750 U CN209593750 U CN 209593750U
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- CN
- China
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- magnetostriction
- needle
- immersion needle
- immersion
- miniature loudspeaker
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Abstract
The utility model discloses a kind of magnetostriction miniature loudspeakers, including vibration film, immersion needle is connected on the vibration film, immersion needle is magnetostriction materials, it is non-contact around immersion needle to be wound with unidirectional coil, the electric current of the logical variation of coil generates changing magnetic field, and immersion needle generates in variation magnetic field the length variation of up and down direction and vibrated, and immersion needle vibration drives vibration film to generate sound.To solve the problems, such as that existing dynamic speaker is bulky.
Description
Technical field
The utility model relates to field of electronic device more particularly to a kind of magnetostriction miniature loudspeakers.
Background technique
Existing dynamic speaker includes cone, voice coil and magnet, and voice coil is a coil, according to Faraday's law,
When current-carrying conductor passes through magnetic field, an electric power will receive, direction, which meets, not comes bright left hand rule, power and electric current, magnetic field
Direction is orthogonal, and stress size is directly proportional to electric current, conductor length, magnetic flux density.When voice coil input alternation tone currents,
Voice coil is generated alternate motion by alternation motive force, drives cone vibration, pushes air repeatedly and sounding.This loudspeaker
The problem of be, magnetic field but also need that cone is driven to move since voice coil had not only needed galvanization to generate, voice coil must assure that it
Mechanical elasticity, to ensure after it generates deformation that such voice coil must be done since own resilient can also drive cone to restore to the original state
It can ensure that it has enough elastic force to drive cone enough to great talent, this results in such loudspeaker that cannot be made too small, such as
Fruit be made cannot do it is small in certain occasions will to will lead to integral device volume larger, such as power grid equipment for communication is a kind of
Portable communicating tool, it is inconvenient to carry due to having used dynamic speaker to cause its volume larger.
Summary of the invention
Technical problem to be solved by the utility model is: a kind of magnetostriction miniature loudspeaker is provided, to solve existing electricity
The bulky problem of loudspeaker.
The technical solution of the utility model is: a kind of magnetostriction miniature loudspeaker, including vibration film, and the vibration is thin
Connect immersion needle on film, immersion needle is magnetostriction materials, non-contact around immersion needle to be wound with unidirectional coil, coil
The electric current of logical variation generates changing magnetic field, and immersion needle generates in variation magnetic field the length variation of up and down direction and vibrated, shaken
Dynamic needle vibration drives vibration film to generate sound.
Attachment base is equipped between the immersion needle and vibration film, attachment base is the plectane that diameter is greater than immersion needle, connection
Seat one side is fixedly connected with vibration film, and attachment base another side and immersion needle are integrally formed.
The immersion needle is externally provided with casing, and casing central axis overlaps with immersion needle central axis, and immersion needle is not
It contacts and is in casing inner cavity with casing, coil is wrapped in casing outer wall, and casing is non-conducting material.
The magnetostriction miniature loudspeaker further includes bottom plate, and casing one end opposite with vibration film is fixedly connected with bottom
Plate, bottom plate fix casing.
The bottom edge is fixedly connected with supporting walls, and supporting walls join end to end around bottom edge, and supporting walls are surrounded with bottom plate
And there are upper openings.
Supporting walls are fixedly connected with vibration film edge at the upper opening, and supporting walls fix vibration film edge.
The bottom plate is circle.
Immersion needle one end opposite with vibration film is fixedly connected with needle.
The magnetostriction miniature loudspeaker further includes screw shell, and screw shell inner wall is equipped with internal screw thread, under immersion needle
End is equipped with the external screw thread to match with internal screw thread on screw shell with needle upper end, and immersion needle and needle are fixed by screw shell
Connection.
The beneficial effects of the utility model are:
Compared with prior art, the utility model is generating vibration, immersion needle vibration by immersion needle under variation magnetic field
It drives vibration film that air is pushed to realize sounding repeatedly again, generates magnetic since the coil in the utility model only plays galvanization
The effect of field is not played the role of driving vibration film, therefore coil can be made very thin very little, can greatly reduce raise in this way
The size of sound device.
Detailed description of the invention
Fig. 1 is the perspective view of the utility model；
Fig. 2 is the R-R sectional stereogram of the utility model；
Fig. 3 is the top view of the utility model；
Fig. 4 is the N-N sectional view of the utility model；
Fig. 5 is the partial view S of the utility model；
In figure: 1 immersion needle, 2 vibration films, 3 casings, 4 coils, 5 needles, 6 screw shells, 7 attachment bases, 8 bottom plates, 9
Support wall.
Specific embodiment
With reference to the accompanying drawing and utility model is described further in specific embodiment:
Referring to figs. 1 to Fig. 5, a kind of magnetostriction miniature loudspeaker, including vibration film 2 is connected on the vibration film 2
Immersion needle 1, immersion needle 1 are magnetostriction materials, and non-contact around immersion needle 1 to be wound with unidirectional coil 4, coil 4 is logical
The electric current of variation generates changing magnetic field, and immersion needle 1 generates in variation magnetic field the length variation of up and down direction and vibrated, vibrated
The vibration of needle 1 drives vibration film 2 to generate sound.Internal diameter can be used than immersion needle 1 in the non-contact winding of coil 4 and immersion needle 1
Coil 4 is wrapped in tubule outer wall by big plastic straw.4 interior bone internal diameter of coil can also be made to be greater than 1 outer diameter of immersion needle, directly
It connects and immersion needle 1 is inserted directly into 4 interior bone of coil.The fixation of vibration film 2 and 4 relative position of coil, which can be used, to be vibrated
The method that 2 edge of film adds support fixed.In use, magnetostriction materials are changing since immersion needle 1 is magnetostriction materials
Change in size can be generated under magnetic field, 1 length of immersion needle is longer, and length is longer relative to width direction on 1 length direction of immersion needle,
The accumulative deformation that 1 length direction of immersion needle generates under variation magnetic field is more much bigger than width direction, therefore immersion needle 1 can be in its length
It spends direction and generates biggish change in size, the variation of 1 size of immersion needle shows as up and down direction vibration in outside, and immersion needle 1 shakes
It is dynamic to drive vibration film 2 that air is pushed to realize sounding repeatedly again, since the coil 4 in the utility model only plays energization miscarriage
The effect of magnetisation field is not played the role of driving vibration film 2, therefore coil 4 can be made very thin very little, in this way can be great
Reduce the size of loudspeaker.
Attachment base 7 is equipped between the immersion needle 1 and vibration film 2, attachment base 7 is the plectane that diameter is greater than immersion needle 1,
7 one side of attachment base is Nian Jie with vibration film 2, and 7 another side of attachment base and immersion needle 1 are integrally formed and connect.Due to 1 end face of immersion needle
Area is smaller, therefore viscous force is smaller, is easy to fall if be directly bonded on vibration film 2, using integrally formed connection
Seat 7 is bonded, and reduces the risk that immersion needle 1 and vibration film 2 fall off.
The immersion needle 1 is externally provided with casing 3, and 3 central axis of casing overlaps with 1 central axis of immersion needle, vibration
Needle 1 does not contact with casing 3 and in 3 inner cavity of casing, and coil 4 is wrapped in 3 outer wall of casing, and casing 3 is non-conducting material.Casing
3 first is that make the winding of coil 4 more convenient, second is that the immersion needle 1 that can avoid coil shake, which contacts coil 4, generates destruction to coil.
The magnetostriction miniature loudspeaker further includes bottom plate 8, and the one end opposite with vibration film 2 of casing 3 is fixedly connected
Bottom plate 8, bottom plate 8 are fixed by casing 3.In addition bottom plate 8 is also acted as and avoids its vibration thin first is that play the effect that casing 3 is fixed
The effect of the mutual interference of 2 front and back sound of film, ensure that the positive transmission of sound wave and the propagation of low-frequency sound.
8 edge of bottom plate is fixedly connected with supporting walls 9, and supporting walls 9 join end to end around 8 edge of bottom plate, supporting walls 9 and bottom plate
8 surround and there are upper openings.Supporting walls 9, which can rise, further strengthens the positive transmission of sound wave and the propagation of low-frequency sound.
Supporting walls 9 are fixedly connected with 2 edge of vibration film at the upper opening, and supporting walls 9 consolidate 2 edge of vibration film
It is fixed.So that vibration film 2 is integrally formed with supporting walls 9, carry and use more convenient.
The bottom plate 8 is circle.It is round easy to process.
The immersion needle 1 one end opposite with vibration film 2 is fixedly connected with needle 5.Needle 5 also can be in changing magnetic field
Vibration, but its Oscillation Amplitude is smaller with respect to the immersion needle 1 of magnetostriction materials in identical variation magnetic field, by adjusting magnetic
The Oscillation Amplitude for the adjusting vibration film 2 that 5 size of needle can be suitable for, keeps magnetostriction miniature loudspeaker volume suitable.
The magnetostriction miniature loudspeaker further includes screw shell 6, and 6 inner wall of screw shell is equipped with internal screw thread, immersion needle 1
Lower end and 5 upper end of needle are equipped with the external screw thread to match with internal screw thread on screw shell 6, and immersion needle 1 and needle 5 pass through thread bush
Cylinder 6 is fixedly connected.Immersion needle 1 is connected by screw shell 6 and needle 5 is stronger, is not easily disconnected from.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (9)
1. a kind of magnetostriction miniature loudspeaker, including vibration film (2), it is characterised in that: connected on the vibration film (2)
Immersion needle (1), immersion needle (1) are magnetostriction materials, and immersion needle (1) surrounding is non-contact to be wound with unidirectional coil (4),
The electric current of the logical variation of coil (4) generates changing magnetic field, and immersion needle (1) generates the length variation of up and down direction in variation magnetic field
And vibrate, immersion needle (1) vibration drives vibration film (2) to generate sound.
2. magnetostriction miniature loudspeaker according to claim 1, it is characterised in that: the immersion needle (1) and vibration are thin
Between film (2) be equipped with attachment base (7), attachment base (7) be diameter be greater than immersion needle (1) plectane, attachment base (7) on one side with vibration
Film (2) is fixedly connected, and attachment base (7) another side and immersion needle (1) are integrally formed.
3. magnetostriction miniature loudspeaker according to claim 1, it is characterised in that: immersion needle (1) is externally provided with
Casing (3), casing (3) central axis overlap with immersion needle (1) central axis, and immersion needle (1) does not contact simultaneously with casing (3)
In casing (3) inner cavity, coil (4) is wrapped in casing (3) outer wall, and casing (3) is non-conducting material.
4. magnetostriction miniature loudspeaker according to claim 3, it is characterised in that: the magnetostriction miniature loudspeaker
It further include bottom plate (8), casing (3) one end opposite with vibration film (2) is fixedly connected bottom plate (8), and bottom plate (8) is by casing (3)
It is fixed.
5. magnetostriction miniature loudspeaker according to claim 4, it is characterised in that: bottom plate (8) edge is fixed to be connected
It connects supporting walls (9), supporting walls (9) join end to end around bottom plate (8) edge, and supporting walls (9) are surrounded with bottom plate (8) and there are tops to open
Mouthful.
6. magnetostriction miniature loudspeaker according to claim 5, it is characterised in that: supporting walls at the upper opening
(9) it is fixedly connected with vibration film (2) edge, supporting walls (9) fix vibration film (2) edge.
7. magnetostriction miniature loudspeaker according to claim 4, it is characterised in that: the bottom plate (8) is circle.
8. magnetostriction miniature loudspeaker according to claim 1, it is characterised in that: the immersion needle (1) and vibration are thin
The opposite one end of film (2) is fixedly connected with needle (5).
9. magnetostriction miniature loudspeaker according to claim 8, it is characterised in that: the magnetostriction miniature loudspeaker
Further include screw shell (6), screw shell (6) inner wall is equipped with internal screw thread, immersion needle (1) lower end and needle (5) upper end be equipped with
The external screw thread that internal screw thread matches on screw shell (6), immersion needle (1) are fixedly connected with needle (5) by screw shell (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920486538.6U CN209593750U (en) | 2019-04-11 | 2019-04-11 | A kind of magnetostriction miniature loudspeaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920486538.6U CN209593750U (en) | 2019-04-11 | 2019-04-11 | A kind of magnetostriction miniature loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209593750U true CN209593750U (en) | 2019-11-05 |
Family
ID=68375719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920486538.6U Active CN209593750U (en) | 2019-04-11 | 2019-04-11 | A kind of magnetostriction miniature loudspeaker |
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| Country | Link |
|---|---|
| CN (1) | CN209593750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862495A (en) * | 2019-04-11 | 2019-06-07 | 贵州电网有限责任公司 | A kind of communication system of power grids equipment magnetostriction loudspeaker |
-
2019
- 2019-04-11 CN CN201920486538.6U patent/CN209593750U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862495A (en) * | 2019-04-11 | 2019-06-07 | 贵州电网有限责任公司 | A kind of communication system of power grids equipment magnetostriction loudspeaker |
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