CN2490781Y

CN2490781Y - Miniature ultrathin broadband loudspeaker

Info

Publication number: CN2490781Y
Application number: CN 01235997
Authority: CN
Inventors: 林和鼎
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-22
Filing date: 2001-05-22
Publication date: 2002-05-08
Anticipated expiration: 2011-05-22

Abstract

A miniature ultrathin broadband loudspeaker comprises a frame 1, a U-shaped magnetic gauge 2, a magnet body 3, a magnet hat 4, a cone 5 and a voice coil 6, wherein the voice coil 6 is adhered around the circular hole 51 of the cone 5 which is flat type, a elastic orientation damper 52 is adhered on the lower part of the cone, the other end of the damper 52 is adhered the inner surface of the bottom of the frame 1. Compared with the prior art, the utility model has advantages that firstly, the utility model can make the miniature ultrathin broadband loudspeaker upmost ultrathin; secondly, the utility model can improve the tone, widen response, increase sensitivity; thirdly, the utility model can reduce the production process and production cost.

Description

Small ultra-thin wideband loud speaker

The utility model relates to the electro-acoustic converter in the pickoff field, particularly relates to ultrathin internal magnetization moving-coil speaker.

In order to satisfy the requirement of various pocket and ultrathin palm appliance and electronics, the loud speaker of selling on the market is much made ultrathin type now, and this makes super-thin speaker have extensive market prospects.Super-thin speaker of the prior art, as shown in Figure 1, its sound basin 5 ' is done funnel by mylar, and the central part 51 ' of sound basin 5 ' upwards arches upward, and one or several Zhe ring 52 ' of design is to guarantee the axial motion flexibility on the limit.Although the sound basin adopts such shape can finish the flexibility of axial motion and better rigidity requirement own, but bring the contradiction in the design simultaneously: enough flexibilities are axially being arranged in order to make super-thin speaker, can only adopt thin mylar, but too thinly reduce the rigidity of sound basin again and make the frequency response of loud speaker and distortion all become abominable; If adopt thicker mylar, the stiff problem of sound basin has solved, but makes axial flexible variation and modulus of elasticity too greatly the response of whole loud speaker on low frequency be degenerated.Moreover, owing to for to reach the restriction that " ultra-thin " is subjected to axial dimension, this loud speaker can't be placed damper again, does not also allow bigger magnetic Circuit Design simultaneously, magnetic circuit often only with the Nd-Fe-B magnet steel of a slice than thin high energy product, must make loudspeaker sensitivity be restricted like this.

The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of structure improved, the thickness of loud speaker, the sensitivity of increase loud speaker can be further reduced, the low frequency of loud speaker and the small ultra-thin wideband loud speaker of distortion can be improved again.

The purpose of this utility model can be by realizing by the following technical solutions:

Design and produce a kind of small ultra-thin wideband loud speaker, comprise basin frame, U-shaped yoke, magnet, magnetic cap, sound basin and voice coil loudspeaker voice coil, described voice coil loudspeaker voice coil is bonded on the centre bore periphery of sound basin, described sound basin is plate, flexible location damper is gluedd joint in its below, edge, and the other end of described elasticity location damper directly is bonded in the upper base surface of basin frame.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the structural scheme of mechanism of prior art ultrathin loudspeaker;

Fig. 2 is the structural representation of the utility model small ultra-thin wideband loud speaker embodiment one;

Fig. 3 is the structural representation of the utility model small ultra-thin wideband loud speaker embodiment two;

Fig. 4 is the utility model small ultra-thin wideband loudspeaker cone schematic diagram;

Fig. 5 is the schematic diagram of the utility model small ultra-thin wideband loud speaker elasticity location damper for annular;

Fig. 6 is that the utility model small ultra-thin wideband loud speaker elasticity location damper is the schematic diagram of one section arc;

Fig. 7 is that the utility model small ultra-thin wideband loud speaker elasticity location damper is the schematic diagram of one section straight line.

Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.

A kind of small ultra-thin wideband loud speaker, as shown in Figure 2, comprise basin frame 1, U-shaped yoke 2, magnet 3, magnetic cap 4, sound basin 5 and voice coil loudspeaker voice coil 6, described voice coil loudspeaker voice coil 6 is bonded on centre bore 51 peripheries of sound basin 5, described sound basin 5 is plate, make by mylar sheet or micarex, as shown in Figure 4, when with the engineering plastics thin slice, must increase thereon and radially strengthen striped 54, flexible location damper 52 is gluedd joint in its below, edge, and the other end of described elasticity location damper 52 directly is bonded in the upper base surface of basin frame 1.It is integrally formed that described basin frame 1 and U-shaped yoke 2 can be same block of material.

Elasticity location damper 52 is made by sponge or rubber, is designed to " C " shape or " Z " shape or " ∑ " shape during for rubber.It can be for annular, one section arc or linear, respectively as Fig. 5, Fig. 6 and shown in Figure 7.After adopting this structure, when voice coil loudspeaker voice coil 6 is placed in the effective magnetic field and have tone currents to pass through, under the effect of magnetic field force, sound basin 5 is axially done audio frequency vibration loud speaker, and the elasticity at sound basin edge location damper 52 has vibrated damping action to this when supporting sound basin 5 to do up-down vibration, makes the tonequality of loud speaker better.Because sound basin 5 adopts flat structure, the existence of elasticity location damper 52 makes loud speaker that damping preferably arranged in addition, thus on axial design, do not waste any useful space, thus it is the thinnest that loud speaker can be accomplished.Moreover, elasticity location damper 52 also can play the radial location effect to sound basin 5, sound basin voice coil loudspeaker voice coil radially can't moved, so sound basin 5 need only be considered to strengthen its rigidity when design and ignore other, elasticity location damper 52 is only considered its damping and modulus of elasticity when design, like this, can make the frequency response broad and the tonequality of loud speaker better.

Described sound basin 5 is equipped with at least two voice coil loudspeaker voice coils, is equipped with corresponding magnetic circuit under each voice coil loudspeaker voice coil, and Fig. 3 is for being equipped with the schematic diagram of the small ultra-thin wideband loud speaker of two voice coil loudspeaker voice coils on the sound basin.The loud speaker of this structure because the thickness of multipath magnetic circuit all is the same, does not therefore increase the gross thickness of loud speaker, but has increased the magnetic motive force, thereby the sensitivity of loud speaker is greatly improved.For the low frequency performance of pursuing loud speaker better, must further reduce the modulus of elasticity of vibrational system, at this moment elasticity location damper 52 is designed to denumerable support point, but this structure makes the chamber, front and back of sound basin 5 that gas leakage be arranged, the sound wave of the sound wave of sound basin back antiphase before to the sound basin has certain interference effect, so that influence tonequality.This problem can solve by the packing ring of being done by sponge or felt at the edge of basin frame 1 placement one circle 8.Packing ring 8 can make the edge of loud speaker and the purpose that the sound chamber reaches base closed on the one hand, and the sound wave of while for the sound basin back cavity antiphase that elasticity location damper support point is caused plays sound deadening, offset negative influence, makes tonequality better.

Being shaped as of described sound basin 5 is circular, square, all drop within the protection range of the present utility model during rhombus etc.

Compared with prior art, the key that the utility model has solved in the ultrathin loudspeaker design is the contradiction of " just with gentle ", Its advantage is: 1, can make ultrathin loudspeaker accomplish in maximum " ultra-thin "; 2, improve tonequality, widen frequency response, strengthen Sensitivity; 3, reduce production process, reduce cost of manufacture.

Claims

1. small ultra-thin wideband loud speaker, comprise basin frame (1), U-shaped yoke (2), magnet (3), magnetic cap (4), sound basin (5) and voice coil loudspeaker voice coil (6), described voice coil loudspeaker voice coil (6) is bonded on circular hole (51) periphery of sound basin (5), it is characterized in that: described sound basin (5) is for plate, flexible location damper (52) is gluedd joint in its periphery below, and the other end of described damper (52) directly is bonded in the bottom interior surface of basin frame (1).

2. small ultra-thin wideband loud speaker as claimed in claim 1 is characterized in that: described basin frame (1) and U-shaped yoke (2) are integrally formed for same block of material.

3. small ultra-thin wideband loud speaker as claimed in claim 1 is characterized in that: described sound basin (5) is made by engineering plastics, has on it radially to strengthen striped (54).

4. small ultra-thin wideband loud speaker as claimed in claim 1 is characterized in that: described sound basin (5) is made by micarex.

5. small ultra-thin wideband loud speaker as claimed in claim 1 is characterized in that: described elasticity location damper (52) is made by rubber, and rectangle, " C " shape, " Z " shape or " ∑ " shape transverse shape are arranged.

6. small ultra-thin wideband loud speaker as claimed in claim 1 is characterized in that: described elasticity location damper (52) is made by sponge.

7. as claim 5 or 6 described small ultra-thin wideband loud speakers, it is characterized in that: described elasticity location damper (52) has annular.

8. as claim 5 or 6 described small ultra-thin wideband loud speakers, it is characterized in that: described elasticity location damper (52) has one section arc or linear.

9. small ultra-thin wideband loud speaker as claimed in claim 1 is characterized in that: on the described sound basin (5) at least two voice coil loudspeaker voice coils are installed, are equipped with corresponding magnetic circuit under each voice coil loudspeaker voice coil.