CN1498033A - Small loudspeaker - Google Patents
Small loudspeaker Download PDFInfo
- Publication number
- CN1498033A CN1498033A CNA2003101025046A CN200310102504A CN1498033A CN 1498033 A CN1498033 A CN 1498033A CN A2003101025046 A CNA2003101025046 A CN A2003101025046A CN 200310102504 A CN200310102504 A CN 200310102504A CN 1498033 A CN1498033 A CN 1498033A
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- CN
- China
- Prior art keywords
- surface cover
- magnet system
- loud speaker
- amplifier
- integrated circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention concerns a miniaturized loudspeaker that operates according to the electrodynamic principle, and particularly for incorporation in small devices, such as telephones, mobile phones, hands-free devices for telephones, headphones, or the like, with a membrane (3) and a moving coil (4) fastened to it, a membrane holder (5), a magnet system (2), and optionally a front cover (7) and/or a rear cover, as well as a digital amplifier.The invention is characterized by the fact that the digital amplifier is arranged in the form of an integrated circuit (10) either on the magnet system (2) or on the membrane holder (5), or on the inside of the front cover (7) or the rear cover.
Description
Technical field
The present invention relates to a kind of miniature loudspeaker according to electrodynamic principle work, it is particularly suitable for being embedded in such as in phone, mobile phone, hands-free device, earphone or the similar midget plant, be connected with movably coil thereon, and it also has film frame, magnet system, and optional front surface cover (cover) and/or rear surface cover, it also comprises digital amplifier.
Background technology
Such loud speaker comprises magnet system and is fixed with the film of coil, also comprises fixing film frame, and it is used to assemble electromagnetic system, also is used for determining the position of film with respect to magnet system together with front surface cover and rear surface cover.In the miniature loudspeaker known in the prior art, amplifier or final amplifier should be positioned at the zone with the loud speaker direct neighbor, and because heat, the flat board of rear surface cover and carrying amplifier must provide, and it should be fixed to the outside of rear surface cover.
On overall, can loud speaker can be divided into different several classes according to some standards.A main criteria for classification is its operation principle, and wherein a kind of division is exactly to be divided into two kinds of electrodynamic loud speaker and electrostatic loudspeakers.Because a variety of causes, the latter want beguine according to the loud speaker costliness of electrodynamics principle work many, so electrostatic loudspeaker only is applied in the equipment at high price.
The standard of another kind of classification is based on passive or active loudspeaker is divided.As be applied in usually in the high-fidelity unit loud speaker be passive, that is to say that they are powered with regard to the amplifier or the power supply that do not need to add like this by the electric current power supply that the signal that carries transforms on cable.
Active loudspeaker includes final amplifier in its shell, only transmit low-power information on its holding wire like this, so holding wire can design very tinyly and flexible, and the signal amplification process that is amplified to the energy grade of expectation only occurs over just the inside of loud speaker self casing.Like this just as common broadcast receiver or similar equipment, its amplifier just is assemblied on the chassis of oneself, and loud speaker itself is again again by having the signal-powered of desired intensity, like this, this term " active loudspeaker " is not right-on, but strictly, only be applied to be assemblied in combination in the same casing.
Used amplifier also can be according to the classification of its principle, do not consider to use among their casing be active loud speaker or passive speaker the time, be divided into analogue amplifier and digital amplifier according to different standards substantially.
The example of the loud speaker that application is very small-sized can obtain from patent text US 5 001 762A, and what this patent was related is the hearing aids that can insert in the ear: electronic circuit forms on support plate, and it comprises microphone and loud speaker.The method of not setting forth its work in the literary composition is electrodynamic or static, and not relating to is speaker design, and the working method that does not also disclose amplifier is simulation or digital.
What the present invention relates to is to use the electrodynamics principle, the use digital amplifier, and the miniature loudspeaker of in such as mobile phone, earphone, hands-free device and similar midget plant, using.
What not only each Component Design imaging prior art will be allowed is like that little, also will be with they such settings: if possible, can save some parts, perhaps several parts are combined into parts, this point is for keeping alap manufacturing cost yes vital in the production of parts in enormous quantities, thought mentioned above has great importance in application.
Summary of the invention
Purpose of the present invention is exactly the loud speaker of a kind of such definition of design, and this speaker design is much simpler than the described speaker design of prior art, like this, allows the reduction of the simultaneous cost of miniaturization.
According to the present invention, this target can reach by the following method: its digital amplifier occurs with the integrated circuit form, and it is arranged on the magnet system, perhaps is arranged on the film frame, perhaps is positioned at the inboard of front surface cover or rear surface cover.
Basic thought of the present invention just provides an amplifier, and it is arranged within the volume scope that the front and rear surfaces cover constitutes, just in the inside of loud speaker.According to the present invention, just as under situation about using usually, if lacked these face cap, and their function can be connected on magnet system or the film frame according to amplifier of the present invention by other parts replacement of this device.
It is to be noted, in specification that provides and claim, do not need to be interpreted as that magnet system or film frame are exactly the different parts that are designed to one, but need understand these parts can partly be made of several separate, and for example, it can comprise the insert that is made of conductive materials, is used to be convenient to contact with coil.These parts are familiar with for the technical staff in loudspeaker techniques field, their effect is the sound effect that reaches expection, just as friction capstan winch (friction capstans) or similarly parts be considered to part in the parts in the scope of the invention, it also can be positioned at the opening or perforation place of loud speaker.
Because the digital amplifier in the modern times in the loud speaker that uses in application of the present invention is highly integrated, and comprising the optional optional feature of integrated circuit and minority basically, the suitable position that they are fixed to loud speaker can be realized for the people who is familiar with this area and has knowledge of the present invention, and do not had very big problem.
Description of drawings
Hereinafter show the present invention by several concrete instances.These examples are
Fig. 1 has shown first example,
Fig. 2 is second example, and
Fig. 3 is the 3rd modification of the present invention.
Embodiment
Can find out obviously that from Fig. 1 common miniature loudspeaker 1 comprises magnet system 2, film 3, film have the coil 4 that is fixed to the upper, and also comprise film frame 5.In described embodiment, also need to be provided for providing the feeder line 6 (feedline) and the front surface cover 7 of electric current to coil 4.Connection opening 8 represents with schematic diagram in film frame 5 fully, and the volume that is positioned at film 3 " back " is connected to around it, to reach the characteristic of loud speaker 1 expection by connection opening.Certainly, friction capstan winch or similar parts can be positioned at connection opening 8 places, and in other words, opening can be worked like this, to reach suitable coordinating.
Parts identical with Fig. 1 among Fig. 2 mark with identical Reference numeral, and different is the inside that amplifier 9 is arranged on front surface cover 13.The front surface cover has perforation 14, is used for allowing the sound from film 3 occurs to pass through.In this description, do not show common connection opening (Fig. 1), but such connection opening can certainly be provided.The electronics of 11 inside connects 15 expressions in the drawings from film 3 to circuit board.
Shown in Fig. 3 is a very favorable modification when miniature loudspeaker 1 will be assembled in a bigger built in items, and for this target, film frame 5 is provided with closed-loop 16 (enclosing ring).Closed-loop can be designed to independently parts or be designed to film frame be one.In this case, the integrated circuit 10 of amplifier can select not have circuit board, and can be set directly in the cavity or groove of closed-loop.
One or more outwards radial projection of stretching out can be provided, and it replaces closed-loop to be used for fixing loud speaker; They also can be used to assemble amplifier.
Certainly, other modification also is fine; For example, if need to be provided with rear surface cover all the time, amplifier 9 just can be arranged on the inboard that cover the rear surface, can prevent well so mechanically with electromagnetism on interference.
Schematically the contact point of outside is expressed as elastomeric joint (elastic tab) among the figure.If the form of being set forth also has special advantage, certainly select any other type of attachment: the automatically cleaning (self-cleaning) in the process that the compensation of tolerance and contact surface move between joint and apparent surface, this point also will cause in the process that moves along the symmetry axis direction displacement with respect to contact surface.
Production according to miniature loudspeaker of the present invention does not have problem for knowing the electroacoustics theory and understanding people of the present invention; Equally, according to the setting of amplifier, the method for producing in assembling must consider to adapt to the guiding of corresponding parts and circuit.
Claims (4)
1. according to the miniature loudspeaker of electrodynamics principle work, it can be embedded in as phone, mobile phone, the hands-free device that is used for phone, in earphone or the similar midget plant, it has film (3) and is fixed to the moving coil (4) of film, film frame (5), magnet system (2), and optional front surface cover (7) and/or rear surface cover, also has digital amplifier, it is characterized in that digital amplifier is arranged on the magnet system (2) with the form of integrated circuit (10), perhaps be arranged on the film frame (5), perhaps be arranged on the inboard of front surface cover (7) or rear surface cover.
2. loud speaker as claimed in claim 1 is characterized in that magnet system (2) has a groove or perforation (12), and integrated circuit (10) is arranged on wherein.
3. loud speaker as claimed in claim 2 is characterized in that integrated circuit (10) is installed on the circuit board (12), and circuit board is connected to magnet system (2).
4. loud speaker as claimed in claim 1 is characterized in that integrated circuit (10) is arranged on the circuit board, and circuit board forms at least a portion on front surface cover (7) or the rear surface cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101025046A CN1498033A (en) | 2002-10-22 | 2003-10-21 | Small loudspeaker |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1607/2002 | 2002-10-22 | ||
| CNA2003101025046A CN1498033A (en) | 2002-10-22 | 2003-10-21 | Small loudspeaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1498033A true CN1498033A (en) | 2004-05-19 |
Family
ID=34256715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101025046A Pending CN1498033A (en) | 2002-10-22 | 2003-10-21 | Small loudspeaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1498033A (en) |
-
2003
- 2003-10-21 CN CNA2003101025046A patent/CN1498033A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |