WO2018010138A1

WO2018010138A1 - Arc line loudspeaker diaphragm

Info

Publication number: WO2018010138A1
Application number: PCT/CN2016/090002
Authority: WO
Inventors: 袁信明
Original assignee: 易力声科技(深圳)有限公司
Priority date: 2016-07-14
Filing date: 2016-07-14
Publication date: 2018-01-18

Abstract

An arc line loudspeaker diaphragm, consisting of a central sphere top (1) and an outer arc portion (2) connected to the outer edge of the central sphere top (1). The surface of the outer arc portion (2) is provided with a circle of radial rib lines (3) in the circumferential direction of the outer arc portion (2), and the rib lines (3) have a radian. By changing the lines into an arc shape, the medium-high frequency response of a miniature loudspeaker is adjusted, so that a frequency response curve becomes smooth in a frequency band, the purpose of improving the frequency response is achieved, and the problem of diaphragm deformation is resolved.

Description

Arc-shaped speaker diaphragm

Technical field

The utility model relates to a diaphragm used on a loudspeaker, in particular to an arc diaphragm loudspeaker diaphragm.

Background technique

The dynamic earphone is the most common and common earphone. Its driving unit is basically a small dynamic moving speaker. The voice coil (diaphragm) connected to it is driven by a voice coil in a permanent magnetic field. The dynamic earphones are relatively efficient, and most of them can be driven by the headphone output of the audio, and are reliable and durable.

The pattern on the traditional earphone diaphragm is basically designed as a linear shape. It is easy to generate reverse vibration or split vibration in the middle and high frequency bands. Splitting vibration is a difficult problem, and no effective solution has been found so far. Analyze the expression of diaphragm vibration, there are two forms, one is radial, occurring in the low frequency range, from babies to 2K Near Hz. The other is a ring-shaped split vibration that occurs in the intermediate and high frequency bands. The traditional theory holds that the radial segmentation vibration is related to the non-uniformity of the diaphragm, and the ring segmentation vibration is caused by the anti-resonance of the ring and is related to the resonance of the diaphragm itself.

Utility model content

The technical problem to be solved by the utility model is to propose a diaphragm which improves the reverse vibration of the middle and high frequency bands and divides the vibration to make the vibration more balanced.

The technical solution proposed by the utility model to solve the above technical problem is: an arc-shaped speaker diaphragm, which is composed of a top portion of a center ball and an outer arc portion connected to an outer edge of the top of the center ball, and the surface of the outer arc portion A radial rib is arranged along its circumference, the rib having an arc.

Further, the ribs are a segment of curved ribs.

Further, the rib is a two-stage arc rib, and the two-stage arc is composed of two arcs.

Further, the rib is a multi-segment curved rib, and the multi-segment arc is composed of at least three arcs.

Further, the surface of the diaphragm is plated with a metal coating.

Further, the diaphragm is made of a composite of a PAR material layer, a PU material layer and a PEEK material layer having the same shape.

Further, the diaphragm is made of a PET material.

Further, the diaphragm is made of a PEN material.

Further, the diaphragm is made of a PEI material.

Further, the diaphragm is made of a PEEK material.

The beneficial effects of the utility model are:

The utility model adjusts the shape of the pattern to an arc shape, adjusts the medium-high frequency response of the micro-speaker, makes the frequency response curve smooth in a certain frequency band, achieves the purpose of improving the frequency response, and also improves the deformation of the diaphragm.

DRAWINGS

The arc-shaped speaker diaphragm of the present invention will be further described below with reference to the accompanying drawings.

Figure 1 is a schematic structural view of an arc-shaped speaker diaphragm in the first embodiment (1);

Figure 2 is a schematic structural view of the arc-shaped speaker diaphragm of the first embodiment (2);

3 is a schematic view showing a rib structure of an arc-shaped speaker diaphragm in the first embodiment;

Figure 4 is a comparison diagram of the frequency response curve test of the diaphragm in the first embodiment;

Figure 5 is a schematic view showing the rib structure of the arc-shaped speaker diaphragm in the second embodiment;

Fig. 6 is a schematic view showing the rib structure of the arc-shaped speaker diaphragm in the third embodiment.

detailed description

Embodiment 1

According to Fig. 1, the arcuate speaker diaphragm of this embodiment is constituted by a center ball top 1 and an outer arc portion 2 connected to the outer edge of the center ball top 1.

As shown in FIGS. 2 and 3, the surface of the outer arc portion 2 is arranged with a ring of radial ribs along its circumferential direction, and the ribs are a section of curved ribs 3. In the present embodiment, the radius of the circle in which the one-segment arc is located is 10.7 mm.

Comparing the arc-shaped speaker diaphragm of the embodiment with the conventional straight-line speaker diaphragm, the result is shown in FIG. 4, and the curve a is the frequency response curve of the arc-shaped speaker diaphragm in the embodiment, and the conventional straight-line speaker. After the comparison of the frequency response curve b of the diaphragm, the curvature of the diaphragm pattern can be found. After the curve is 3k~5k and 6KHz, the frequency response is smoother and the peaks and valleys are reduced, indicating that the reverse vibration and the segmentation vibration of the medium and high frequencies are greatly improved.

Embodiment 2

This embodiment is an improvement based on the first embodiment: as shown in FIG. 5, the rib pattern in this embodiment is a two-stage curved rib 4. In this embodiment, the two-stage arc is composed of a combination of two arcs having a radius of 11.09 mm and a radius of 16.37 mm. Of course, the radius of the circle where the two arcs are located can also be other values.

Embodiment 3

This embodiment is an improvement based on the first embodiment: as shown in FIG. 6, the ribs in this embodiment are three-section curved ribs 5. In the present embodiment, the three-stage arc is composed of a three-segment arc in which the radius of the circle is 8.80 mm, the radius of the circle is 16.69 mm, and the radius of the circle is 6.61 mm. Of course, the radius of the circle where the three arcs are located can also be other values.

The present invention is not limited to the above embodiments, and the technical solutions of the above various embodiments of the present invention can be cross-combined with each other to form a new technical solution, and the technical solutions formed by the equivalent replacement are all required by the present invention. Within the scope of protection.

Claims

An arc-shaped speaker diaphragm is composed of a top portion of a center ball and an outer arc portion connected to an outer edge of the top portion of the center ball, wherein the surface of the outer arc portion is radially arranged along a circumferential direction thereof. Ribs, the ribs having a curvature.
The arced speaker diaphragm of claim 1 wherein said ribs are a segment of curved ribs.
The embossed speaker diaphragm according to claim 1, wherein the rib is a two-stage arc rib, and the two-stage arc is composed of two arcs.
The arced speaker diaphragm of claim 1 wherein said ribs are multi-segment curved ribs and said multi-segment arc is comprised of at least three arcs.
A curved speaker diaphragm according to any one of claims 1 to 4, wherein the surface of the diaphragm is plated with a metal coating.
The arced speaker diaphragm according to claim 5, wherein said diaphragm is made of a composite of a PAR material layer, a PU material layer and a PEEK material layer having the same shape.
The embossed speaker diaphragm according to claim 5, wherein said diaphragm is made of a PET material.
The embossed speaker diaphragm according to claim 5, wherein said diaphragm is made of a PEN material.
The ellipsoidal speaker diaphragm of claim 5 wherein said diaphragm is made of a PEI material.
The ellipsoidal speaker diaphragm of claim 5 wherein said diaphragm is made of a PEEK material.