CN2314539Y - Speaker - Google Patents

Abstract

The utility model relates to a loudspeaker which is composed of an outer shell, a paper basin, an iron core, a coil, a permanent magnet, a connecting rod, a lever, etc., wherein, the outer shell of the loudspeaker is connected with the paper basin through a plurality of layers of folding rings, and a center position of the paper basin is connected with a displacement amplifying device which is used for enlarging the vibration amplitude of the paper basin and is composed of the connecting rod, the lever, elastic connection slices, etc. After the loudspeaker is provided with a plurality of layers of folding rings, the total deformability of the loudspeaker can be enhanced, and therefore, the loudspeaker is matched with the paper basin with large amplitude. The vibration range of the paper basin is large, which is good for low frequency sound reproduction and leads a small sound box to emit higher sound power.

Description

A kind of loud speaker

The utility model belongs to a kind of playback set, relates to a kind of loud speaker.

The low-frequency minimum of sealing audio amplifier playback is determined by following formula: $f_{\mathrm{oc}}=\sqrt{{\mathrm{<figure-callout\; id="0"\; label="f"\; filenames="Y9722067500051.png"\; state="\{\{state\}\}">f</figure-callout>}}_0^2+\frac{355a^4}{m_{0}V}}$

Wherein: f _OcLow-frequency minimum for playback

f _oResonance frequency for loud speaker

A is the effective radius of loud speaker

m _oQuality for vibrational system

V is the internal volume of audio amplifier

Can draw thus: to the audio amplifier of a constant volume, reduce the bore of loud speaker, can reduce the gap of audio amplifier and loud speaker low-frequency minimum, help making full use of the low frequency audio playback ability of loud speaker, reduce the low-frequency minimum of audio amplifier, improve the playback effect of audio amplifier.But after reducing the bore of loud speaker,, then need to increase the amplitude of diffuser in order to send onesize volume.And the amplitude of existing dynamic speaker is subjected to the restriction of ring deformability, and being difficult to increases.

The purpose of this utility model is a kind of loud speaker of design, and this loud speaker can increase the amplitude of cone, thereby can play the effect that improves playback effect to the audio amplifier of a constant volume.

For achieving the above object, take following design: the related loud speaker of the utility model is made up of shell, cone, iron core, coil, permanent magnet, connecting rod, lever etc., is connected by the multilayer ring between described speaker housings and cone.

The utlity model has following advantage:

1, after loud speaker is provided with the multilayer ring, can increase its total deformability, thereby adapt with the cone of large amplitude.And the oscillating region of cone is big, helps the low frequency playback.

2, the multilayer ring has more weak elasticity, is equivalent to the less spring of the coefficient of stiffiness, can reduce the resonance frequency of cone vibrational system, expansion low-frequency playback scope.

3, the oscillating region of cone is big, makes little audio amplifier also can send higher sound power.

4, the small-bore loud speaker of this form can match with little audio amplifier, is used for the low frequency playback.That is: the less audio amplifier of volume also is unlikely and makes that the low-frequency minimum of audio amplifier is much higher.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is a shape and structure schematic diagram of the present utility model

Fig. 2 is the syndeton schematic diagram of upper and lower support bar in the utility model

Fig. 3-Fig. 5 is the shape schematic diagram of multilayer ring in the utility model

Fig. 6 is the bellows-shaped schematic diagram of ring and cone in the utility model

Fig. 7 is the key diagram of design principle in the utility model

As shown in Figure 1, the utility model is made up of shell 1, cone 2, iron core 3, coil 4, permanent magnet 5, connecting rod 6,10, lever 7 etc.2 of described shell 1 and cones are connected by multilayer ring 8.The center position of cone 2 is connected with the displacement amplification device of being made up of connecting rod 6, lever 7, connecting rod 10, flexible connection piece 9 etc. that a cover is used to strengthen the cone amplitude.Wherein the center position of cone 2 is connected with connecting rod 6 vertically downward, and the other end of connecting rod 6 connects a horizontal lever 7 by flexible connection piece 9, and the other end of lever 7 is connected on the shell 1 by flexible connection piece 9.And the two ends of connecting rod 10 are respectively by flexible connection piece 9 and the lever 7 and iron core 3 vertical connections that are parallel to each other, and the other end of iron core 3 links to each other with upper and lower support bar 11,12 by flexible connection piece 9, and its contact is upper and lower stack place of support bar 11,12.Described flexible connection piece 9 all adopts welding or bonding mode to be connected with corresponding part, thereby makes above-mentioned displacement amplification device become an integral body.

Upper support bar 11 is fixed on the speaker housings 1.The upper end of lower support bar 12 is screwed projection.This projection 13 passes flexible connection piece 9 and is rotatably connected in support bar 11 inner chambers, and its structure as shown in Figure 2.

Fasteningly pass magnetic pole 15 with screw 14 and be rotatably connected in lower support bar 12 inner chambers, thereby magnetic pole 15, coil 4, permanent magnet 5 is fixed together with speaker housings 1.Also have some apertures on the shell 1, make sound be able to propagate to the rear of loud speaker.

The multilayer ring 8 that shell 1 and cone are 2 can be designed to multiple shape, as shown in Figure 3-Figure 5.Wherein, the ring of Fig. 3, Fig. 5 is by some dish-shaped sheets accumulations, bonding forming; And ring shown in Figure 4 is a bellows composition.For improving the deformability of ring, the ring number of plies should be more than or equal to 3.Among the cited embodiment of the utility model, what all adopt is five layers of ring.

Ring 8 is looped around on cone 2 outer rings, and with the cone outer ring identical shape is arranged, and has identical shaped ripple that is:, as shown in Figure 6, and to coordinate the ring distortion.

Operation principle is as follows:

Iron core 3 is in the magnetic field that permanent magnet 5 forms by magnetic pole 15, and when having electric current to flow through in the coil 4, iron core 3 turns in two magnetic poles one corresponding to the sense of current, thereby the motion by connecting rod 10, lever 7, connecting rod 6 drives cone 2 vibrations.In the above-mentioned motion, lever 7 is a displacement amplifying mechanism, and enlargement ratio is greater than 2, thereby can guarantee that the cone amplitude do not hold amplitude greater than iron core 3.

When the cone peak swing is A, when the gap that magnetic pole is 15 is C, should make: $\frac{A}{C}=\frac{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="Y9722067500051.png"\; state="\{\{state\}\}">L</figure-callout>}}_1+L_2}{{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="Y9722067500051.png"\; state="\{\{state\}\}">L</figure-callout>}}_1},$

Wherein L1 is connecting rod 10 and the lever 7 junctions distance to 1 of casing; L2 be connecting rod 10 to lever 7 junctions the distance to lever 7 other ends and connecting rod 6 junctions.

By above-mentioned formula and Fig. 7 as can be known, for making full use of the range of movement of iron core, the length of lever 7 should be tried one's best greatly (being that L1+L2 should try one's best greatly), to reduce the non-linear factor influence.Consider limit by structure that the length of lever 7 can be similar to the radius of speaker housings 1 and equate.Also should make simultaneously: connecting rod 10 and lever 7 junctions to the distance of 1 of casing less than the distance of connecting rod 10 with lever 7 junctions to lever 7 other ends and connecting rod 6 junctions, promptly L1 answers＜L2.

Claims (10)

1, a kind of loud speaker is made up of shell (1), cone (2), iron core (3), coil (4), permanent magnet (5), connecting rod (6,10), lever (7) etc., it is characterized in that: be connected by multilayer ring (8) between described shell (1) and cone (2).

2, a kind of loud speaker according to claim 1, it is characterized in that: the center position of cone (2) is connected with the displacement amplification device of being made up of connecting rod (6), lever (7), connecting rod (10), flexible connection piece (9) etc. that a cover is used to strengthen the cone amplitude vertically downward.

3, loud speaker according to claim 1, it is characterized in that: the center of cone (2), be connected with connecting rod (6) vertically downward, the other end of connecting rod (6) connects a horizontal lever (7) by flexible connection piece (9), and the other end of lever (7) is connected on the shell (1) by flexible connection piece (9).And the two ends of connecting rod (10) are respectively by flexible connection piece (9) and the lever (7) and iron core (3) vertical connection that are parallel to each other, the other end of iron core (3) links to each other with upper and lower support bar (11), (12) by flexible connection piece (9), and its contact is upper and lower stack place of support bar (11,12).

4, loud speaker according to claim 2, it is characterized in that: upper support bar (11) is fixed on the speaker housings (1), the upper end of lower support bar (12) is screwed projection, and this projection (13) passes flexible connection piece (9) and is rotatably connected in support bar (11) inner chamber.

5, loud speaker according to claim 1 is characterized in that: fasteningly pass magnetic pole (15) with screw (14) and be rotatably connected in lower support bar (12) inner chamber, and magnetic pole (15), coil (4), permanent magnet (5) is fixed on the speaker housings (1).

6, loud speaker according to claim 1 is characterized in that: the length of lever (7) can be similar to the radius of speaker housings (1) and equate.

7, loud speaker according to claim 5 is characterized in that: connecting rod (10) and lever (7) junction are to the distance of the distance between casing (1) less than connecting rod (10) and lever (7) junction to lever (7) other end and connecting rod (6) junction.

8, according to claim 1 or 6 described loud speakers, it is characterized in that: the multilayer ring (8) between described shell (1) and cone (2) for pile up, bonding dish-shaped sheet, bellows.

9, loud speaker according to claim 8 is characterized in that: the ring number of plies of multilayer ring (8) is more than or equal to 3.

10, according to claim 1 or 9 described loud speakers, it is characterized in that: ring (8) is looped around on cone (2) outer ring, and with the cone outer ring identical shaped ripple is arranged.

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