WO2019223320A1

WO2019223320A1 - Sound production apparatus and electronic device

Info

Publication number: WO2019223320A1
Application number: PCT/CN2018/125632
Authority: WO
Inventors: 刘华伟; 郭翔
Original assignee: 歌尔股份有限公司
Priority date: 2018-05-21
Filing date: 2018-12-29
Publication date: 2019-11-28
Also published as: CN208285530U

Abstract

Embodiments of the present utility model provide a sound production apparatus and an electronic device. The sound production apparatus comprises: a vibration system, a magnetic circuit system, and a housing for receiving and fixing the vibration system and the magnetic circuit system; the vibration system comprises a voice coil; the magnetic circuit system comprises a first magnetic conductive plate located on a lead wiring path of the voice coil; a lead of the voice coil is provided on the first magnetic conductive plate; a first end portion of the first magnetic conductive plate close to a lead-out end of the lead is provided with a receding groove for receding vibration of the lead. The technical solution provided in the embodiments of the present utility model can reduce noise of collision between a lead and a magnetic conductive plate, thereby improving the acoustic performance.

Description

Sound generator and electronic equipment

Technical field

The utility model belongs to the technical field of electroacoustic conversion devices, and in particular, the utility model relates to a sound generating device and electronic equipment.

Background technique

Sound generator is an important acoustic component in electronic products. It is used to complete the conversion between electrical signals and sound signals. It is an energy conversion device.

In the existing sound generating device, the lead of the voice coil is usually arranged on the magnetically permeable plate. During the power-on operation of the sound generating device, the voice coil lead will vibrate up and down with the voice coil, and it is easy to collide with the magnetically permeable plate, resulting in noise.

In addition, the lead wire collides with the magnetic conductive plate for a long time, which easily leads to the problem of lead wire disconnection.

Utility model content

An object of the present invention is to reduce the collision noise between the lead and the magnetically permeable plate, so as to improve the acoustic performance.

An embodiment of the present invention provides a sound generating device, which includes a vibration system, a magnetic circuit system, and a housing that houses and fixes the vibration system and the magnetic circuit system;

The vibration system includes a voice coil;

The magnetic circuit system includes a first magnetically permeable plate located on a lead wiring path of the voice coil;

A lead of the voice coil is disposed on the first magnetically permeable plate;

An escape groove is provided on a first end portion of the first magnetic conductive plate near the lead-out end to avoid vibration of the lead.

Optionally, the avoidance groove is formed by the upper surface of the first end portion being recessed downward, and the avoidance groove penetrates the inner side surface of the first end portion.

Optionally, the outside of the first magnetically permeable plate is injection-molded on the inner wall of the housing.

Optionally, the avoidance groove is provided along the inner wall of the housing.

Optionally, the avoidance groove is a bevel groove;

The lowest point of the bevel groove is closer to the lead-out end than the highest point of the bevel groove.

Optionally, the avoidance groove is a straight groove.

Optionally, a portion of the lead opposite to the avoidance groove is connected to the groove bottom of the avoidance groove through a gel.

Optionally, the colloid is soft gum.

Optionally, a portion of the lead opposite the avoidance groove is suspended in the avoidance groove.

Another embodiment of the present invention provides an electronic device including the sound generating device according to any one of the foregoing.

In the technical solution provided by the embodiment of the present utility model, since the portion of the lead wire near the lead-out end has the largest vibration amplitude, the collision force between this part and the first magnetically permeable plate is the largest. By providing an avoidance groove on the first end portion of the first magnetically conductive plate near the lead-out end of the lead, when the sound generating device works, it can effectively avoid the collision between the part of the lead near the lead-out end and the first magnetically conductive plate, thereby effectively reducing noise caused by the lead collision To improve acoustic performance.

Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which form a part of the specification, describe embodiments of the present invention and, together with the description, serve to explain the principles of the invention.

1 is a schematic structural diagram of a sound generating device provided by an embodiment of the present invention;

2 is a schematic structural diagram of a housing and a magnetically permeable plate in a first viewing direction provided by an embodiment of the present invention;

FIG. 3 is an enlarged view at I in FIG. 2; FIG.

4 is a schematic structural diagram of a housing and a magnetically permeable plate in a second viewing angle direction provided by an embodiment of the present invention;

5 is a sectional view taken along line A-A in FIG. 4;

6 is a schematic structural diagram of a sound generating device according to another embodiment of the present invention;

FIG. 7 is a schematic structural view of a housing and a magnetically permeable plate in a first viewing direction provided by another embodiment of the present invention; FIG.

8 is an enlarged view at H in FIG. 7;

9 is a schematic structural view of a housing and a magnetically permeable plate in a second viewing angle direction provided by still another embodiment of the present invention;

Fig. 10 is a sectional view taken along line A-A in Fig. 9.

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, unless specifically stated otherwise, the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. The following description of at least one exemplary embodiment is actually merely illustrative, and in no way serves as any limitation on the present invention and its application or use.

Techniques and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but where appropriate, the techniques and equipment should be considered as part of the description. In all examples shown and discussed herein, any specific value should be construed as exemplary only and not as a limitation. Therefore, 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 drawings, so once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

FIG. 1 is a sound generating device provided by an embodiment of the present invention. As shown in FIG. 1, the sound generating device includes: a vibration system, a magnetic circuit system, and a housing 3 accommodating a fixed vibration system and a magnetic circuit system; the vibration system includes a voice coil 10; and the magnetic circuit system includes a lead wire located in the voice coil 10 The first magnetically permeable plate 20 on the 101 wiring path; the lead 101 of the voice coil 10 is provided on the first magnetically permeable plate 20; The avoidance tank 201.

In the technical solution provided by the embodiment of the present utility model, since the portion of the lead wire near the lead-out end has the largest vibration amplitude, the collision force between this part and the first magnetically permeable plate is the largest. By providing an avoidance groove on the first end portion of the first magnetically conductive plate near the lead-out end of the lead, the portion of the lead near the lead-out end of the sound emitting device can effectively avoid the collision of the lead with the first magnetically conductive plate during the operation of the sound generating device, thereby effectively reducing the lead-induced collision. Noise, improve acoustic performance. In addition, through the design of the avoidance groove, the problem of wire breakage can be avoided, and the service life of the sound generating device can be improved.

In a specific implementation structure, the vibration system includes a diaphragm (not shown) and a voice coil 10 coupled to one side of the diaphragm. The voice coil 10 includes a voice coil body and a lead 101. The lead 101 may include a positive line and a negative line. The magnetic circuit system includes a yoke, a central magnet and an edge magnet coupled to the yoke, a central magnetically permeable plate coupled to the upper surface of the central magnet, and an edge magnetically permeable plate coupled to the upper surface of the side magnet. A magnetic gap is formed between the center magnet and the side magnets, and the voice coil 10 is suspended in the magnetic gap. The magnetic circuit system can be a three magnetic circuit system or a five magnetic circuit system.

In the case of a three magnetic circuit system, the number of side magnets is two, and the side magnets are disposed on opposite sides of the center magnet, and the two side magnetic guide plates combined on the side magnets on the opposite sides are used as the first magnetic guide plate. The positive wire of the lead 101 is arranged on one of the magnetically permeable plates, and the negative wire of the lead 101 is arranged on the other magnetically permeable plate.

In the case of a five magnetic circuit system, the number of side magnets is four, the four side magnets are opposite each other, and are arranged around the center magnet. The upper surface of each side magnet is combined with an edge magnetic guide plate, and any two opposite The side magnetically permeable plate serves as the first magnetically permeable plate. The positive wire of the lead wire 101 is arranged on one of the side magnetically permeable plates, and the negative wire of the lead wire 101 is arranged on the other magnetically permeable plate.

Generally, the lead 101 is arranged on the upper surface of the first magnetically permeable plate 20, and the lead 101 easily collides with the upper surface of the first magnetically permeable plate 20 when the lead 101 vibrates. Therefore, the avoidance groove 201 is provided on the first magnetically permeable plate 20 The upper surface of the first end portion, that is, the avoidance groove 201 is formed by the upper surface of the first end portion of the first magnetically permeable plate 20 being recessed downward. In order to meet the current miniaturization design requirements of electronic products, the volume of the sounding device is also designed to be smaller and smaller, and the design space for the avoidance groove is limited. In this case, in order to ensure that the avoidance function of the avoidance groove can be normally realized, the avoidance groove 201 may be penetrated through the inner side surface of the first end portion, wherein the side of the voice coil body of the first end portion close to the voice coil 10 is inward side. In this way, the slot area of the avoidance groove 201 can be increased, and collisions with the upper end surface of the groove wall of the avoidance groove when the lead is vibrated due to the notch area being too small and installation errors can be avoided.

In a specific structure, the outer side of the first magnetically permeable plate 201 is injection-molded on the inner wall of the housing 3, which can not only reduce the volume but also fix the magnetic circuit system. In order to increase the area of the notch, the avoidance groove 201 may be provided along the inner wall of the casing 3.

The avoidance groove 201 may be an inclined groove or a straight groove. In this embodiment, the shape of the avoidance groove 201 is not specifically limited, as long as it can avoid the lead 101 from vibrating.

In an implementable structure, as shown in FIG. 2, FIG. 3, FIG. 4, and FIG. 5, the avoidance groove 201 is an inclined groove, that is, the bottom of the avoidance groove is an inclined surface. Since the vibration amplitude of the part closer to the lead-out end of the lead 101 is larger, the lowest point of the bevel groove is set closer to the lead-out end of the lead 101 than the highest point of the bevel groove. The groove depth at the lowest point of the bevel groove is greater than the groove depth at the highest point of the bevel groove. The use of the inclined groove can reduce the shape change of the first magnetically permeable plate, and reduce the influence of the setting of the avoidance groove 201 on the magnetic field line correction function of the first magnetically permeable plate.

In another achievable structure, as shown in FIG. 6, FIG. 7, FIG. 8, FIG. 9, and FIG.

The portion of the lead 101 opposite to the avoidance groove 201 may be suspended in the avoidance groove 201 or connected to the groove bottom of the avoidance groove 201 through a gel. The binding of the lead 101 can be increased by the gel, which can reduce the vibration amplitude of the lead. Specifically, the colloid may be soft glue, so that when the lead wire vibrates up and down, the colloid will expand and contract, and the restraint of the lead wire is increased by the elastic force of the colloid, thereby reducing the vibration amplitude of the lead wire. As shown in FIG. 1, after the lead wire 101 is led out from the voice coil body and before reaching the first magnetically permeable plate 20, there is still a suspension portion 1011, which has a U-shaped structure.

Another embodiment of the present invention also provides an electronic device. The electronic device includes the sound generating device in any one of the above embodiments.

The above electronic devices include, but are not limited to, mobile phones, smart watches, VR devices, and the like.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for the purpose of illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A sound generating device, comprising: a vibration system, a magnetic circuit system, and a housing that houses and fixes the vibration system and the magnetic circuit system;

The vibration system includes a voice coil;

The magnetic circuit system includes a first magnetically permeable plate located on a lead wiring path of the voice coil;

A lead of the voice coil is disposed on the first magnetically permeable plate;

An escape groove is provided on a first end portion of the first magnetic conductive plate near the lead-out end to avoid vibration of the lead.
The sound generating device according to claim 1, wherein:

The avoidance groove is formed by the upper surface of the first end portion being recessed downward, and the avoidance groove penetrates the inner side surface of the first end portion.
The sound generating device according to claim 1, wherein an outer side of the first magnetically permeable plate is injection-molded on an inner wall of the housing.
The sound generating device according to claim 3, wherein the avoidance groove is provided along an inner wall of the casing.
The sound generating device according to claim 1, wherein the avoidance groove is an inclined groove;

The lowest point of the bevel groove is closer to the lead-out end than the highest point of the bevel groove.
The sound generating device according to claim 1, wherein the avoidance groove is a straight groove.
The sound emitting device according to any one of claims 1-6, wherein a portion of the lead opposite to the avoidance groove is connected to a groove bottom of the avoidance groove through a gel.
The sound producing device according to claim 7, wherein the colloid is a soft gel.
The sound generating device according to any one of claims 1-6, wherein a portion of the lead wire opposite to the avoidance groove is suspended in the avoidance groove.
An electronic device, comprising the sound generating device according to any one of claims 1-9.