WO2019010725A1

WO2019010725A1 - Loudspeaker

Info

Publication number: WO2019010725A1
Application number: PCT/CN2017/094738
Authority: WO
Inventors: 张成飞; 郭翔; 朱婷
Original assignee: 歌尔科技有限公司
Priority date: 2017-07-10
Filing date: 2017-07-27
Publication date: 2019-01-17
Also published as: CN207124745U

Abstract

The present invention relates to a loudspeaker. The loudspeaker comprises a magnetic circuit system and a vibration system. The vibration system comprises a vibration diaphragm and a centering supporting sheet combined with the vibration diaphragm. The centering supporting sheet is a sheet-shaped member made of an elastic material, and comprises an edge portion located on the outer circumference and a central portion located in the center. The edge portion and the central portion are connected by means of at least one supporting portion. The supporting portion is of a sheet-shaped structure. The loudspeaker in the present invention can effectively alleviate the polarization problem, and further improves the acoustic performance of the loudspeaker.

Description

speaker

Technical field

The present invention relates to acoustic elements and, more particularly, to a speaker.

Background technique

Currently, most acoustic devices have suspended leads in their speakers to connect external circuits through leads. In such products, due to the provision of leads, the leads can cause traction in the product during the vibration process. The traction of the leads will cause the forces on the lead side and the non-lead side of the product to be inconsistent, resulting in different amplitudes on both sides. That is, the amplitude on the lead side is small, and the amplitude on the non-lead side is large, thereby causing polarization of the product. Polarization problems will further lead to product disconnection and poor listening. Therefore, it is necessary to further reduce or solve the polarization problem of the product, further improve the acoustic performance and improve the reliability of the product.

Summary of the invention

It is an object of the invention to improve the acoustic performance of a loudspeaker.

According to an aspect of the invention, a speaker is provided, comprising a magnetic circuit system and a vibration system, the vibration system comprising a diaphragm and a centering piece combined with the diaphragm, wherein the centering piece is a sheet-like member made of an elastic material; the centering piece includes an edge portion at an outer circumference and a central portion at the center, and the edge portion and the center portion are connected by at least one support portion, the support The part is a sheet structure.

Preferably, the voice coil includes an annular voice coil body and a pair of leads drawn from the same side of the voice coil body; the leads are suspended.

Preferably, the voice coil body includes a lead-out side at the lead take-out position and a free side opposite the lead-out side; the support portion includes a first support arm and a second support arm, the first support arm Corresponding to the take-out side arrangement, the second support arm is disposed corresponding to the free side.

Preferably, the width of the second support arm in the horizontal direction is greater than the width of the first support arm in the horizontal direction.

Preferably, the support portion further includes a third support arm, the third support arm being disposed corresponding to one side of the lead wire.

Preferably, the first support arm, the second support arm and the third support arm are all linear.

Preferably, there is a gap between the edge portion of the centering piece and the center portion, and the plurality of the first support arm, the second support arm and the third support arm are in the gap Isometric or unequal distance distribution at any position.

Preferably, the centering piece is a single layer structure made of a silicone rubber or a thermoplastic elastomer material; or the centering piece is a multilayer made of at least one of a silica gel or a thermoplastic elastomer material Composite structure.

Preferably, the diaphragm is disposed on a side of the centering piece toward the magnetic circuit system, the voice coil is disposed on a lower surface of the diaphragm; or the voice coil is disposed on the The centering piece faces the side of the magnetic circuit system, and the diaphragm is disposed on the other side of the centering piece.

Preferably, the centering piece is coupled to one end of the voice coil that protrudes into the magnetic gap of the magnetic circuit system.

One technical effect of the present invention is to solve the polarization problem and further improve the acoustic performance of the speaker.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The accompanying drawings, which are incorporated in FIG.

1 is a plan view of a speaker of the present invention.

2 is a schematic view showing the structure of a centering piece of the speaker of the present invention.

Fig. 3 is a schematic view showing another structure of the centering piece of the speaker of the present invention.

Figure 4 is a cross-sectional view of the speaker of the present invention.

Fig. 5 is a schematic exploded view of the speaker of the present invention.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques and devices should be considered as part of the specification.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

Referring to Figures 1 to 3, the speaker of the present invention includes a vibration system and a magnetic circuit system. 4 to 5, the vibration system includes a centering piece 1, a side of the centering piece 1 is coupled with a diaphragm 4, and a side of the centering piece 1 facing the magnetic circuit system is coupled with a voice coil 5, sound The ring 5 is provided with a pair of lead wires 51 arranged in a hanging manner, and one end of the voice coil 5 is placed in a magnetic gap formed by the magnetic circuit system. Wherein, the diaphragm 4 and the voice coil 5 may be disposed on the same side of the centering piece 1, the voice coil 5 is disposed on the lower surface of the diaphragm 4 (as shown in FIG. 4), and may also be disposed in the centering piece 1 On opposite sides (not shown), that is, the voice coil 5 is disposed on the side of the centering piece 1 facing the magnetic circuit system, and the diaphragm 4 is disposed on the other side of the centering piece 1. Of course, the two arrangements described herein are the position where the centering piece 1 is coupled to the top end portion of the voice coil 5 (ie, the end close to the diaphragm 4), in addition to which the centering piece 1 can be attached. It is disposed at the bottom end of the voice coil 5 (ie, the end of the voice coil 5 that protrudes into the magnetic gap of the magnetic circuit system). When the voice coil passes through alternating currents of different sizes and directions, the magnetic field movement of the reciprocating cutting can be performed in the magnetic gap to drive the vibration of the diaphragm, thereby initiating the sound of the air and completing Energy conversion between electroacoustics.

Further, referring to FIG. 1, the centering piece 1 includes an edge portion 11 at the outer periphery and a central portion 12 at the center. There is a gap between the edge portion 11 and the center portion 12, and the two can be connected by at least one (usually a plurality of) sheet-shaped support portions 15, and the support portion 15 can suppress the large amplitude of the diaphragm 4. External transfer, buffering the larger amplitude, and the larger amplitude after buffering tends to be close to the smaller amplitude, thereby reducing the influence of polarization and improving the acoustic performance of the speaker. Moreover, the centering support piece 1 is made of a highly elastic material, and the polarization effect is better, so that the speaker has good acoustic performance and reliability.

In a specific implementation, the centering support piece 1 may be a single layer structure made of silica gel, may be a single layer structure made of thermoplastic elastomer material (TPU), or may be made of at least one of the two. The layer composite structure, for example, the centering piece 1 is made of a plurality of layers of silica gel, or the centering piece 1 is made of a plurality of layers of TPU, or the centering piece 1 is composed of at least one layer of silica gel and at least one layer of TPU. to make. It should be noted that the silica gel materials and the TPU materials listed herein are merely illustrative examples for explaining the high elastic materials, and are not intended to limit the present invention, as long as they are relatively high elastic materials.

Further, the centering piece 1 is a sheet-like member, which adopts a flat design and is simple and convenient to shape. In a specific embodiment, the centering support 1 is matched to the shape of the diaphragm 4 and the voice coil 5, each having a rectangular outer contour, wherein the diaphragm 4 comprises an intermediate portion at the intermediate position (middle) a flat spherical dome is integrated on the portion to improve the high frequency), an upwardly convex portion or a downwardly recessed folding portion provided on the outer side of the intermediate portion, and a fixing portion located at the outermost periphery, and the edge portion 11 of the centering support piece 1 The central portion 12 of the centering piece 1 is connected and fixed to the intermediate portion of the diaphragm 4, and the support portion 15 of the centering piece 1 corresponds to the folded portion of the diaphragm 4.

The voice coil 5 includes an annular voice coil body and a pair of leads 51 drawn from the same side of the voice coil body, so that the voice coil body is located at the lead-out side at the lead-out side 511, and the opposite end from the lead-out side is the free side 512. The support portion 15 of the centering piece 1 may include a first support arm 151 and a second support arm 152, the first support arm 151 being disposed corresponding to the lead-out side 511, and the second support arm 152 being disposed corresponding to the free side 512.

Referring to FIGS. 1 to 2 , the support portion 15 includes a first support arm 151 and a second support arm 152 . Since the traction force received by the lead-out side 511 is large, the generated amplitude is small; The free side 512 of the lead receives less traction and produces a larger amplitude. Therefore, the width of the second support arm 152 in the horizontal direction can be set larger than the width of the first support arm 151 in the horizontal direction, and the amplitude suppression effect of the second support arm 152 on the free side of the lead can be improved.

Referring to FIG. 3, the support portion 15 further includes a third support arm 141 corresponding to one side of the lead 51 to connect the edge portion 11 and the center portion 12 at the corresponding positions, thereby ensuring that the lead side 14 is vibrating. Stability in the middle.

Further, the first support arm 151, the second support arm 152, and the third support arm 141 are all linear. Compared with the support type of the curve type (for example, S type or Z type) in the prior art, the linear support arm has a relatively small rotational angle position, and can avoid collision between the rotational position and the diaphragm in a large amplitude state; On the other hand, in the prior art, the curved support arm design is easy to cause the total width to be too wide due to the limitation of the mold capacity, so that the width of the diaphragm is set, and the narrow diaphragm cannot be made. It is easy to cause a small-sized speaker or receiver to use the curved support arm structure of the prior art, but in the present technical solution, the support arm is designed to be a straight type to solve the problem well.

In addition, it should be noted that the speaker of the present invention has a centering support arm 15 designed to be linear, and its position is adjustable when a plurality of first support arms 151, second support arms 152 and third are provided. When the arm 141 is supported, a plurality of support arms may be disposed at any position in the gap between the center portion 12 and the edge portion 11, and may be equally or non-equally distributed, and the design may be adjusted according to the performance of the product or the like.

Referring to Figures 4 and 5, the speaker is further provided with a housing 2 and a front housing 10 assembled with the housing 2. An accommodation space for accommodating the vibration system and the magnetic circuit system is formed between the front case 10 and the outer casing 2. The magnetic circuit system includes a basin frame 9 on which the center magnet 7 and the center washer 6 are fixed, and a side magnet 8 is disposed around the center magnet 7. A magnetic gap is formed between the center magnet 7 and the side magnet 8, and one end of the voice coil 5 is disposed in the magnetic gap. In order to realize the transmission of the current signal from the outside to the inside, it is usually possible to inject a conductive member (spring piece, pad, etc.) on the outer casing, and the lead wire 51 of the voice coil 5 is welded and electrically connected to the conduction member, and the conduction member is connected at the same time. The external circuit is such that an external AC signal is input to the voice coil 5 inside the speaker.

Although some specific embodiments of the invention have been described in detail by way of examples, those skilled in the art will understand that the above examples are only for the purpose of illustration and not limitation. The scope of the invention is made. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

A speaker comprising a magnetic circuit system and a vibration system, the vibration system comprising a diaphragm and a centering piece combined with the diaphragm, wherein the centering piece is made of a highly elastic material a sheet-like member; the centering piece includes an edge portion at an outer circumference and a central portion at the center, and the edge portion and the center portion are connected by at least one support portion, the support portion being a sheet-like structure .
The speaker according to claim 1, wherein said voice coil comprises an annular voice coil body and a pair of leads drawn from the same side of said voice coil body; said leads being suspended.
The speaker according to claim 2, wherein said voice coil body includes a lead-out side at said lead take-out position and a free side opposite said lead-out side; said support portion includes a first support arm and a a support arm, the first support arm being disposed corresponding to the lead-out side, and the second support arm being disposed corresponding to the free side.
The speaker according to claim 3, wherein a width of said second support arm in a horizontal direction is greater than a width of said first support arm in a horizontal direction.
The speaker according to any one of claims 1 to 4, wherein the support portion further comprises a third support arm, the third support arm being disposed corresponding to one side of the lead wire.
The speaker according to claim 5, wherein said first support arm, said second support arm, and said third support arm are each linear.
The speaker according to claim 5, wherein a gap exists between an edge portion of the centering piece and the center portion, a plurality of the first support arm, the second support arm, and the The third support arm is equidistantly distributed or unequally distributed at any position in the gap.
The speaker according to any one of claims 1 to 7, wherein the centering piece is a single layer structure made of a silicone rubber or a thermoplastic elastomer material; or, the centering piece is A multilayer composite structure made of at least one of silica gel or a thermoplastic elastomer material.
A speaker according to any one of claims 1 to 7, wherein The diaphragm is disposed on a side of the centering piece toward the magnetic circuit system, and the voice coil is disposed on a lower surface of the diaphragm; or

The voice coil is disposed on a side of the centering piece toward the magnetic circuit system, and the diaphragm is disposed on the other side of the centering piece.
A speaker according to any one of claims 1 to 7, wherein said centering piece is coupled to one end of said voice coil that projects into a magnetic gap of said magnetic circuit system.