CN113473325A

CN113473325A - Speaker and electronic apparatus

Info

Publication number: CN113473325A
Application number: CN202010248953.5A
Authority: CN
Inventors: 蔡晓东; 张鹏; 张琳琳
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2021-10-01
Anticipated expiration: 2040-03-31
Also published as: CN113473325B

Abstract

The invention discloses a loudspeaker and electronic equipment, wherein, the shell of the loudspeaker forms an accommodating space for accommodating a fixed vibration system and a magnetic circuit system, the shell comprises a first shell and a second shell which are arranged separately, and the first shell and the second shell are distributed along the vibration direction of the vibration system and are connected with each other; the vibration direction of the vibrating diaphragm is vertical to the axial direction of the flat voice coil, and the edge part of the vibrating diaphragm is integrally connected with the first shell; the magnetic circuit system comprises a first magnet part and a second magnet part which are arranged at intervals to form a magnetic gap, wherein a first magnetic gap is formed between two opposite magnetic poles at the upper parts of the first magnet part and the second magnet part, a second magnetic gap is formed between two opposite magnetic poles at the lower parts of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper parts and the two opposite magnetic poles at the lower parts are opposite; the flat voice coil is provided with two first lead sections which are distributed at intervals along the vibration direction, and the two first lead sections are respectively positioned in the first magnetic gap and the second magnetic gap.

Description

Speaker and electronic apparatus

Technical Field

The present invention relates to the field of acoustic energy conversion technologies, and in particular, to a speaker and an electronic device.

Background

The shell of the loudspeaker is used for accommodating a fixed vibration system and a magnetic circuit system, and due to the requirements of installation, positioning and the like, the shell is often required to be provided with some positioning or installation structures and the like, so that the structure of the shell is generally complex, and the forming difficulty of the shell is high.

Disclosure of Invention

The invention mainly aims to provide a loudspeaker, aiming at reducing the forming difficulty of a shell.

In order to achieve the above object, the speaker provided by the present invention comprises a housing, a vibration system and a magnetic circuit system, wherein the housing forms an accommodating space for accommodating and fixing the vibration system and the magnetic circuit system;

the shell comprises a first shell and a second shell which are arranged in a split mode, and the first shell and the second shell are distributed along the vibration direction of the vibration system and are connected with each other;

the vibration system comprises a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm to vibrate, the vibration direction of the vibrating diaphragm is perpendicular to the axial direction of the flat voice coil, and the edge part of the vibrating diaphragm is integrally connected with the first shell;

the magnetic circuit system comprises a first magnet part and a second magnet part which are arranged at intervals to form a magnetic gap, a first magnetic gap is formed between two opposite magnetic poles at the upper part of the first magnet part and the second magnet part, a second magnetic gap is formed between two opposite magnetic poles at the lower part of the first magnet part and the second magnet part, and the magnetic pole distribution directions of the two opposite magnetic poles at the upper part and the two opposite magnetic poles at the lower part are opposite;

the flat voice coil is provided with two first lead sections which are distributed at intervals along the vibration direction, and the two first lead sections are respectively positioned in the first magnetic gap and the second magnetic gap.

Optionally, the first and second housings are welded together by laser; or,

the first housing and the second housing are bonded by an adhesive layer.

Optionally, a sealing ring is arranged on the first housing, and the sealing ring extends along the circumferential direction of the first housing; the seal ring and the first shell are integrally formed.

Optionally, the outer circumferential surface of the first housing has a rugged structure, and the inner circumferential surface of the seal ring is fitted with the outer circumferential surface of the first housing.

Optionally, the number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire layers in the radial direction of the flat voice coil.

Optionally, the edge portion is integrally injection molded or hot press molded with the housing.

Optionally, the edge portion is integrally formed with the shell through an injection molding process by using liquid silicone rubber;

or the edge part is integrally formed with the shell through a hot pressing process by adopting one of solid silicon rubber, AEM rubber or ACM rubber.

Optionally, the edge portion has a first connecting section and a second connecting section distributed along the vibration direction and connected to each other, one end of the first connecting section close to the second connecting section is connected to the edge portion, the second connecting section is spaced from the edge portion in a direction perpendicular to the vibration direction, and both the first connecting section and the second connecting section are attached to the inner circumferential surface of the first housing.

Optionally, the diaphragm is curved and protrudes away from the flat voice coil.

Optionally, the first shell is curved, and the curvature direction of the first shell is the same as the curvature direction of the diaphragm.

Optionally, the first magnet portion and the second magnet portion each comprise one first magnet;

the first magnet is bidirectionally magnetized in a direction perpendicular to the vibration direction so that the first magnet has a first magnetic pole orientation and a second magnetic pole orientation arranged along the vibration direction, the first magnetic pole orientation being opposite to the second magnetic pole orientation;

the first magnetic pole orientations of the two first magnets correspond, and the second magnetic pole orientations of the two first magnets correspond.

Optionally, the speaker further comprises: a first support and a second support connecting the diaphragm and the flat voice coil;

the flat voice coil is provided with an induction section and two connecting sections which are respectively arranged at two ends of the induction section, the induction section is positioned in the magnetic gap, and the connecting sections extend out of the magnetic gap along the length direction of the magnetic gap;

the first support and the second support are located outside the magnetic gap and connected with the corresponding connecting sections.

The invention also provides electronic equipment which comprises a shell and the loudspeaker, wherein the loudspeaker is connected with the shell in a sealing mode.

In the invention, the shell is divided into an upper part and a lower part, the two parts of the shell are processed separately, and the structure of each part of the shell is reduced compared with that of the whole shell, so that the processing difficulty of each part of the shell can be reduced. Simultaneously, the casing divide into first casing and second casing and can also promote the feasibility and the convenience of the whole equipment of product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a speaker according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view of the speaker of FIG. 1 taken along a long axis of the flat voice coil;

FIG. 3 is a schematic cross-sectional view of the speaker of FIG. 1 along the short axis segment of the flat voice coil;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a schematic view of the flat voice coil of FIG. 3;

FIG. 6 is a schematic structural diagram of the diaphragm in FIG. 3;

FIG. 7 is an exploded view of the housing of FIG. 3;

fig. 8 is a schematic plan view of the loudspeaker of fig. 3;

fig. 9 is a schematic plan view of a speaker according to another embodiment of the present invention;

fig. 10 is a schematic structural view of a part of the structure of the speaker of fig. 3;

fig. 11 is a front view of the structure of the speaker portion of fig. 3;

fig. 12 is a bottom view of the speaker portion of fig. 3;

FIG. 13 is an assembled view of the first carrier, the second carrier and the flat voice coil of FIG. 12;

FIG. 14 is a schematic view of the speaker and the whole device shown in FIG. 1;

fig. 15 is a sectional view of a conventional speaker;

FIG. 16 is a schematic view of a conventional speaker and a complete set assembled together;

fig. 17 is another assembly diagram of the conventional speaker and the whole device.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a loudspeaker which can be used for wearable electronic equipment such as a watch, and can also be used for earphones, mobile phones, notebook computers, VR equipment, AR equipment, televisions and the like.

Referring to fig. 1 to 3 in combination, the speaker 100 includes a housing 10, a vibration system, and a magnetic circuit system, wherein the housing 10 combines the vibration system and the magnetic circuit system.

Referring to fig. 3 and 8, the magnetic circuit system includes a first magnet portion 21 and a second magnet portion 22 spaced apart to form a magnetic gap 26, a first magnetic gap 27 is formed between two opposite magnetic poles at the upper portion of the first magnet portion 21 and the second magnet portion 22, a second magnetic gap 28 is formed between two opposite magnetic poles at the lower portion of the first magnet portion and the second magnet portion, and the magnetic poles of the two opposite magnetic poles at the upper portion and the two opposite magnetic poles at the lower portion are distributed in opposite directions.

In this embodiment, the upper portion of the first magnet portion 21 and the upper portion of the second magnet portion 22 refer to an end close to the diaphragm 50, and the lower portion of the first magnet portion 21 and the lower portion of the second magnet portion 22 refer to an end far from the diaphragm 50, that is, an end close to the yoke 30.

The first magnetic gap 27 and the second magnetic gap 28 are distributed along the vibration direction of the vibration system, the first magnetic gap 27 and the second magnetic gap 28 together constituting the magnetic gap 26 of the magnetic circuit system.

The two opposite magnetic poles mean that the ends of the first and second magnet portions 21 and 22 (referred to as upper or lower portions) adjacent to each other are respectively an N pole and an S pole, for example, the ends of the first and

second magnet portions

21 and 22 adjacent to each other are respectively an N pole and an S pole.

The distance between the first magnet portion 21 and the second magnet portion 22 is relatively close, so that the magnetic gap 26 formed is relatively narrow in width and generally elongate in shape.

The magnetic circuit system may further include a magnetic yoke 30, the first magnet portion 21 and the second magnet portion 22 are disposed on the magnetic yoke 30, and the first magnet portion 21 and the second magnet portion 22 are spaced apart along a plane of the magnetic yoke 30.

The magnetic circuit system in the embodiment of the present invention has various modes, and the following is specifically described by two embodiments:

referring to fig. 8, in the first embodiment, the first magnet portion 21 and the second magnet portion 22 each include a first magnet 23; the first magnet 23 is bidirectionally magnetized in a direction perpendicular to the vibration direction so that the first magnet 23 has a first magnetic pole orientation and a second magnetic pole orientation arranged along the vibration direction, the first magnetic pole orientation being opposite to the second magnetic pole orientation; the first magnetic pole orientations of the two first magnets 23 correspond, and the second magnetic pole orientations of the two first magnets 23 correspond.

Wherein the two magnetic poles of the first magnetic pole orientation are distributed perpendicular to the vibration direction, and the two magnetic poles of the second magnetic pole orientation are also distributed perpendicular to the vibration direction. For example, the vibration direction is the up-down direction, the S pole and the N pole of the first magnetic pole orientation are distributed from left to right, and the S pole and the N pole of the second magnetic pole orientation are distributed from right to left.

In this embodiment, the first magnetic pole orientations of the two first magnets 23 correspond to each other, and the second magnetic pole orientations of the two first magnets 23 correspond to each other. The correspondence in this embodiment means that the first magnetic pole orientations are all near the same side and the second magnetic pole orientation is near the other side, e.g., the first magnetic pole orientation is near the diaphragm 50 and the second magnetic pole orientation is near the yoke 30. A first magnetic gap 27 is formed between the first magnetic pole orientations of the two first magnets 23 and a second magnetic gap 28 is formed between the second magnetic pole orientations of the two first magnets 23.

The following is specifically illustrated by an example:

the first magnetic pole orientations are distributed at one end of the first magnet 23 near the diaphragm 50, and the S pole and the N pole of the first magnetic pole orientations are distributed in the left-to-right direction, so that the first magnetic pole orientations on the two first magnets 23 are the N pole and the S pole near each other, and the N pole is on the left side, and the S pole is on the right side, that is, the magnetic pole polarities of the two first magnetic pole orientations are opposite.

The second magnetic pole orientations are distributed at the end of the first magnet 23 away from the diaphragm 50, and the S-pole and N-pole of the second magnetic pole orientations are distributed in the direction from right to left, so that the sides of the second magnetic pole orientations on the two first magnets 23 close to each other are the S-pole and the N-pole, and the S-pole is on the left side, and the N-pole is on the right side, that is, the magnetic pole polarities of the two second magnetic pole orientations are opposite.

The flat voice coil 40 has two first wire segments 41 spaced apart along the vibration direction, wherein one first wire segment 41 is located in the first magnetic gap 27, and the other first wire segment 41 is located in the second magnetic gap 28. The direction of the magnetic field force applied to the flat voice coil 40 (one of the first wire segments 41) at the first magnetic pole orientation is the same as the direction of the magnetic field force applied to the flat voice coil 40 (the other one of the first wire segments 41) at the second magnetic pole orientation, and the two magnetic field forces are superposed with each other, so that the magnetic field force applied to the flat voice coil 40 is larger, and further the vibration amplitude of the diaphragm 50 is larger, thereby improving the acoustic performance.

Fig. 9 shows a second embodiment of the magnetic circuit system of the present invention, which is different from the first embodiment in the structure of the magnetic circuit system.

In the second embodiment, the magnetic circuit system includes two second magnets 24 and two third magnets 25, specifically, one second magnet 24 and one third magnet 25 are respectively disposed on two opposite sides of the flat voice coil 40, the magnetic poles of the two second magnets 24 are opposite, and the magnetic poles of the two third magnets 25 are opposite.

In this embodiment, one side of the flat voice coil 40 is provided with a second magnet 24 and a third magnet 25, and the other opposite side is also provided with a second magnet 24 and a third magnet 25.

By arranging one second magnet 24 and one third magnet 25 on the same side of the flat voice coil 40, the arrangement positions of the magnets can be adjusted according to the size of the flat voice coil 40 in the vibration direction, and the effect of better matching the shape of the flat voice coil 40 is achieved. In addition, the second magnet 24 and the third magnet 25 can be respectively adjusted to the position corresponding to one wire segment of the flat voice coil 40, and the second magnet 24 and the third magnet 25 can be spaced in the hollow area of the flat voice coil 40, so that the magnet volume can be reduced, and the magnet consumption can be saved.

In one embodiment, the magnetic poles of the second magnet 24 and the third magnet 25 located on the same side of the flat voice coil 40 are distributed in opposite directions. For example, the left end of the second magnet 24 on the left side is an N pole, the right end is an S pole, and the left end of the third magnet 25 on the left side is an S pole, and the right end is an N pole.

The flat voice coil 40 has two first wire segments 41 spaced apart along the vibration direction, wherein one of the first wire segments 41 is located in the first magnetic gap 27 formed between the two second magnets 24, and the other of the first wire segments 41 is located in the second magnetic gap 28 formed between the two third magnets 25.

With this arrangement, the direction of the magnetic field force applied between the two second magnets 24 by the first wire segment 41 above the flat voice coil 40 is the same as the direction of the magnetic field force applied between the two third magnets 25 by the first wire segment 41 below the flat voice coil 40, which has a superimposed effect, so as to better drive the diaphragm 50 to vibrate.

Referring to fig. 5 and fig. 6, the vibration system includes a diaphragm 50 and a flat voice coil 40 for driving the diaphragm 50 to vibrate, the flat voice coil 40 is located in the magnetic gap 26, and the flat voice coil 40 drives the diaphragm 50 to vibrate up and down under the action of the magnetic circuit system.

The flat voice coil 40 is used to drive the diaphragm 50 to vibrate. The flat voice coil 40 may be directly connected to the diaphragm 50, or the flat voice coil 40 may be connected to the diaphragm 50 through other components, such as a bracket.

The axial direction of the flat voice coil 40 is perpendicular to the vibration direction of the diaphragm 50, for example, in some embodiments, the axial direction of the flat voice coil 40 is in the transverse direction, and the flat voice coil 40 moves in the magnetic gap 26 in the up-and-down direction; the diaphragm 50 extends substantially in the lateral direction, while the vibration direction of the diaphragm 50 is in the up-down direction.

The flat structure of the flat voice coil 40 means that the flat voice coil 40 is flat in the axial direction thereof. Specifically, the width between the inner and outer peripheral surfaces of the flat voice coil 40 is larger than the thickness of the flat voice coil 40 in the axial direction.

The flat voice coil 40 is formed by winding a conductive wire, and the number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire coils in the radial direction of the flat voice coil. In this embodiment, the conductive wires of the flat voice coil 40 are distributed along the radial direction, i.e. wound in the radial direction. The height of the flat voice coil 40 in the axial direction thereof is small, for example, in the axial direction thereof, the number of layers formed by winding the conductive wire of the flat voice coil 40 may be one or a small number of layers, so that the thickness of the flat voice coil 40 in the axial direction is small; and along self radial direction, the number of turns that the electrically conductive wire material of flat voice coil 40 was around establishing formation is more for the width that many rings of electrically conductive wire material formed jointly is great, thereby makes flat voice coil 40 form the flat structure that axial thickness is little, radial width is big.

For example, the axial direction of the flat voice coil 40 is along the width direction of the magnetic gap 26, which enables the distance between the first magnet portion 21 and the second magnet portion 22 forming the magnetic gap 26 to be small, and the structure of the entire speaker 100 may be flat in the width direction of the magnetic gap 26.

Adopt flat voice coil 40, and the axial of flat voice coil 40 is along the width direction of magnetic gap 26, can reduce the width of magnetic gap 26, the space that magnetic gap 26 occupy diminishes promptly, thereby the corresponding inner space of having saved speaker 100, make speaker 100 inside have bigger space holding magnetic circuit, so can improve its acoustic performance through increasing magnetic circuit size, promptly under the prerequisite that does not increase speaker 100 overall dimension, magnetic circuit's volume can be bigger, effect to flat voice coil 40 is better, make vibrating diaphragm 50's vibration range bigger. The increased size of the magnetic circuit system can maintain good acoustic performance of the loudspeaker 100, particularly in cases where the loudspeaker 100 is limited in width dimension.

The width direction of the magnetic gap in the present embodiment refers to the distribution direction of the first magnet portion 21 and the second magnet portion 22.

The flat voice coil 40 has two first wire segments 41 distributed at intervals along the vibration direction, and the two first wire segments 41 are respectively located in the first magnetic gap 27 and the second magnetic gap 28, that is, one of the first wire segments 41 is located in the first magnetic gap 27, and the other first wire segment 41 is located in the second magnetic gap 28, so that the two first wire segments 41 are both subjected to magnetic field forces in the same direction, and have a superimposed effect on the vibration of the diaphragm.

The speaker 100 may have a square configuration, a circular configuration, an oval configuration, etc. The following description will take the strip structure as an example. As shown in fig. 1, the speaker 100 includes two long sides and two short sides (the short sides extend in the width direction of the magnetic gap 26). The length of the long side is greater than the length of the short side. The long and short sides of the flat voice coil 40, diaphragm 50, case 10, and magnetic circuit system correspond to the long and short sides of the speaker 100, respectively.

Referring to fig. 6 again, in an embodiment, the flat voice coil 40 is elongated to have a long axis section 41 and a short axis section 42, the long axis section 41 corresponds to a long side of the speaker 100, an extending direction of the long axis section 41 is perpendicular to the vibration direction, the short axis section 42 corresponds to a short side of the speaker 100, and the short axis section 42 extends along the vibration direction, so that the utilization rate of space can be greatly improved.

In addition, the first magnet part 21 and the second magnet part 22 in the magnetic circuit system are also in an elongated shape, and the length direction of the first magnet part 21 and the second magnet part 22 is the same as the long axis section 41 of the flat voice coil 40, and after the magnetic circuit system and the flat voice coil 40 are adopted, the loudspeaker 100 can make full use of the magnetic circuit system and the flat voice coil 40 in the form, and the space and the structure are reasonably arranged, so that the loudspeaker can be in a flat shape in the distribution direction of the first magnet part 21 and the second magnet part 22 on the basis of ensuring the structural compactness, and is in an elongated shape in the length direction of the first magnet part 21 and the second magnet part 22, and the whole machine space is matched.

For embodiments in which the flat voice coil 40 is elongated, the first wire segment 41 is referred to as the long axis segment 41.

Referring to fig. 2 and fig. 7 again, the vibration system further includes a diaphragm 50, where the diaphragm 50 has a central portion 51, a corrugated portion 52 annularly disposed on an outer edge of the central portion 51, and an edge portion 53 annularly disposed on an outer edge of the corrugated portion 52, where the corrugated portion 52 and the edge portion 53 are both annular.

Referring to fig. 15, in a conventional speaker 100 ', a diaphragm 50 ' is generally a planar diaphragm 50 ', and the acoustic performance of the speaker 100 ' is closely related to the area of the diaphragm 50, and generally, the larger the area of the diaphragm 50 ', the better the acoustic performance is obtained. Thus, to improve acoustic performance, it is conventional practice to increase the area of the diaphragm 50 'by increasing the circumferential dimension of the loudspeaker 100'. This leads to a large volume of the whole speaker 100', and a large space occupation, which is not favorable for the miniaturization and improvement of the whole speaker.

In view of this, referring to fig. 6, in the embodiment of the present invention, the diaphragm 50 is curved and protrudes in a direction away from the flat voice coil 40. In this embodiment, diaphragm 50 has a curved shape, which refers to the curvature of diaphragm 50 as a whole, rather than the flexure of flexure 52 itself.

By bending the diaphragm 50, on the one hand, the area of the diaphragm 50 can be increased, so that the effective area of the central portion 51 is increased, thereby ensuring the power of the loudspeaker 100 and ensuring the acoustic performance. On the other hand, the manner of bending the diaphragm 50 does not require changing the circumferential dimension of the loudspeaker 100, and does not result in an oversize external dimension of the loudspeaker 100, i.e., the structure of other parts of the loudspeaker 100, such as the housing 10, the magnetic circuit system, etc., does not need to be changed, and therefore, normal processing of other parts is not affected.

The shape of the diaphragm 50 can be substantially matched with the shape of the whole machine housing 200, for example, the whole machine housing 200 is in a curved shape, so that the diaphragm 50 in the curved shape can be more matched with the shape of the whole machine housing 200, and the space of the whole machine can be effectively utilized. Thus, the effective vibration area of the center portion 51 is increased under the condition that the installation space of the speaker 100 is constant, so that the power of the speaker 100 is ensured and the acoustic performance is ensured.

In order to better adapt to the curved shape of the whole casing 200, in one embodiment, the diaphragm 50 has a curved shape along the length direction of the magnetic gap 26. In this embodiment, the arrangement direction of the first magnet portion 21 and the second magnet portion 22 is the width direction of the magnetic gap 26, and the vibration direction of the diaphragm is the depth direction of the magnetic gap 26. While the diaphragm 50 is not curved in the width direction of the magnetic gap 26. For example, the whole casing 200 is circular, and the diaphragm 50 is curved along the length direction of the magnetic gap 26 to better match the circular whole casing 200.

Referring to fig. 2, the diaphragm 50 is curved when viewed from the axial direction of the flat voice coil 40, i.e., when viewed from one end of the flat voice coil 40 to the other end. Referring to fig. 3, when viewed from the extending direction of the long axis segment 41 of the flat voice coil 40, the cross section of the flat voice coil 40 is substantially flat (the protrusion formed by the stiffening layer and the concave-convex structure formed by the loop portion 52 are not considered here). That is, the curved diaphragm 50 has an aspheric structure, but has a cylindrical curved surface structure.

In one embodiment, the central portion 51, the loop portion 52 and the edge portion 53 are all curved, and the curvature directions of the central portion 51, the loop portion 52 and the edge portion 53 are the same. Thus, the entire diaphragm 50 is curved, the curved structure of the central portion 51 can increase the effective vibration area, and the curved structure of the edge portion 52 can enhance the structural strength, thereby better connecting the central portion 51 and the edge portion 53; the edge portion 53 is curved, which is advantageous for increasing the contact area between the edge portion 53 and the housing 10 and improving the mounting stability. Alternatively, the bending curvatures of the central portion 51, the corrugated portion 52, and the edge portion 53 may be the same, so that the integral processing may be facilitated.

Since the diaphragm 50 is bent and then protrudes in a direction away from the flat voice coil 40, a space between the diaphragm 50 and the magnetic circuit system is large, so that the edge of the edge portion 52 itself protrudes toward the flat voice coil 40, thereby preventing the edge portion 52 from protruding out of the housing 10 and causing an excessive height of the speaker 100.

The diaphragm 50 may be generally rectangular in shape, with the length direction of the diaphragm 50 being along the long axis of the flat voice coil 40 and the width direction of the diaphragm 50 being along the axial direction of the flat voice coil 40.

The material of the diaphragm 50 is PEEK or other polymer materials. A reinforcing layer is also provided in the central portion 51 of the diaphragm 50. The reinforcing layer can effectively reduce the split vibration of the diaphragm 50 and reduce noise of the speaker 100.

In the above, after the flat voice coil 40 is adopted, the magnetic gap 26 between the first magnet portion 21 and the second magnet portion 22 can be reduced, so that the inside of the speaker 100 has a larger space for accommodating the magnetic circuit system, that is, on the premise of not increasing the overall dimension of the speaker 100, the volume of the magnetic circuit system can be larger, the effect on the voice coil is better, and the vibration amplitude of the diaphragm 50 is larger. In the case where the curved diaphragm 50 has the same area as the planar diaphragm 50, the size of the entire speaker 100 can be reduced to be smaller by using the curved diaphragm 50 according to the embodiment of the present invention, so that the size of the entire speaker can be reduced to be smaller. Meanwhile, the flat voice coil 40 occupies a small space, the space saved by the flat voice coil 40 can be used for designing a magnetic circuit system with a large size, and the magnetic circuit system with the large size can ensure that the flat voice coil 40 receives a large magnetic field force in turn, so that the vibrating diaphragm 50 has a good vibrating effect. Therefore, the flat voice coil 40 and the bending diaphragm 50 cooperate with each other to achieve the effect of a smaller size and better acoustic performance of the speaker 100.

The case 10 forms a housing space for housing the vibration system and the magnetic circuit system, and the edge portion 53 of the diaphragm 50 is connected to the case 10. The casing 10 extends along the outer edge of the magnetic yoke 30 in a ring shape and is connected to the magnetic circuit system and the vibration system, respectively. For example, the edge portion 53 of the diaphragm 50 is typically connected to the housing 10, i.e., the housing 10 is disposed around the edge portion 53 of the diaphragm 50. In addition, the casing 10 is further connected to the magnetic conductive yoke 30, or connected to the first magnet portion 21 and the second magnet portion 22, and the casing 10 and the magnetic conductive yoke 30 together enclose to form a structure that is open toward the diaphragm 50. It should be noted that the annular housing 10 refers to a completely closed ring shape or a non-completely closed ring shape.

The housing 10 has a first end surface 111 close to the edge 53, the first end surface 111 is curved, and the curvature direction of the first end surface 111 is the same as the curvature direction of the diaphragm 50, i.e. the first end surface 111 also protrudes away from the flat voice coil 40. Optionally, the first end surface 111 has the same curvature as the diaphragm 50. The structure formed in this way has a higher degree of engagement with the whole machine housing 200 and a higher utilization rate of space.

In one embodiment, along the bending direction of the diaphragm, the center portion 51 and the edge portion 52 of the diaphragm 50 at corresponding positions are lower than the first end surface 111, and a vibration gap along the vibration direction is formed between the center portion 51 and the first end surface 111. In this embodiment, the central portion 51 and the folded ring portion 52 are lower than the first end surface 111, which means that the central portion 51 and the folded ring portion 52 are accommodated in the accommodating space formed by the housing 10 and do not protrude from the first end surface 111 of the housing 10. Thus, when the speaker 100 is mounted on the whole casing 200, the speaker 100 abuts against the whole casing 200 through the casing 10 itself or the seal ring on the casing 10, and the center portion 51 and the edge portion 52 of the diaphragm 50 are spaced from the whole casing 200 through the vibration gap, which provides a large vibration space for the vibration of the center portion 51 and prevents the diaphragm 50 from interfering with the whole casing 200.

In one embodiment, the edge portion 53 is connected to an inner wall surface of the casing 10, and a surface of the edge portion 53 facing away from the flat voice coil 40 is flush with the first end surface 111 or lower than the first end surface 111. That is, similarly, the edge portion 53 does not protrude from the first end surface 111, and the position where the edge portion 53 is connected is on the inner wall surface of the housing 10, so that it is possible to avoid an increase in the overall height of the speaker 100 (which refers to the thickness direction of the diaphragm 50).

In the present embodiment, the edge portion 53 extends from the end connected to the loop portion 52 in a direction away from the flat voice coil 40 along the inner wall surface of the casing 10, so as to have a larger contact area with the inner wall surface of the casing 10. The surface of the edge portion 53 flush with the first end surface 111 refers to the surface of the edge portion 53 farthest from the flat voice coil 40, i.e., the top surface of the edge portion 53.

Referring to fig. 3, fig. 4 and fig. 7, in an embodiment, the housing 10 includes a first housing 11 and a second housing 12 that are separately disposed, the first housing 11 and the second housing 12 are distributed along a vibration direction of the vibration system and are connected to each other, and an edge portion 53 of the diaphragm 50 is connected to the first housing 11.

In this embodiment, the housing 10 is divided into an upper portion and a lower portion, that is, the upper first housing 11 and the lower second housing 12, the two portions of the housing 10 are separately processed, and the structure of each portion of the housing 10 is reduced compared with the overall housing 10, so that the processing difficulty of each portion of the housing 10 can be reduced. Meanwhile, the division of the housing 10 into the first housing 11 and the second housing 12 can also improve the feasibility and convenience of the overall assembly of the product.

The first housing 11 is annular so as to be capable of being sealingly connected to the edge portion 53 of the diaphragm 50.

The second housing 12 may also be annular, and an upper end surface of the second housing 12 is connected to a lower end surface of the first housing 11 in a sealing manner. The lower end of the second housing 12 may be connected to a magnetic yoke 30. The second housing 12 may be a complete housing 10 or a housing 10 formed by combining a plurality of parts.

To achieve sealing, the first housing 11 and the second housing 12 are thus sealingly connected. For example, in one embodiment, the first housing 11 and the second housing 12 are welded together by laser welding. Alternatively, in one embodiment, the first housing 11 and the second housing 12 are bonded by an adhesive layer. Wherein the bonding layer is in the form of glue or double-sided adhesive tape. The mode of laser welding or bonding of the bonding layer is adopted, so that the strength and the high-grade waterproof effect can be effectively guaranteed.

In order to realize the sealing connection between the housing 10 and the whole machine, in an embodiment, a sealing ring 60 is disposed on the first housing 11, and the sealing ring 60 extends along the circumferential direction of the first housing 11. Specifically, the seal ring 60 may be provided on the outer peripheral surface of the first housing 11 or on the end surface of the first housing 11. When assembled, the gasket 60 of the speaker 100 is in sealing contact with the cabinet 200, thereby preventing water from entering the speaker 100.

In an embodiment, the sealing ring 60 and the first shell 11 are integrally formed and integrated, and no glue is required between the sealing ring 60 and the first shell 1110, so that the requirement of high-grade waterproofing of electronic devices such as smart watches can be met.

The sealing ring 60 may be formed integrally with the first housing 11 in various manners, for example, the sealing ring 60 may be formed integrally with the first housing 11 by injection molding. Specifically, the first housing 11 may be made of metal, and the first housing 11 is used as an insert, and the seal ring 60 is injection molded thereon. The seal ring 60 and the first housing 11 may be formed by hot press molding.

In order to increase the contact area, in an embodiment, the outer circumferential surface of the first housing 11 has a rugged structure, and the inner circumferential surface of the seal ring 60 is engaged with the outer circumferential surface of the first housing 11. The fitting in this embodiment means that the concave shape on the first housing 11 and the convex shape on the seal ring are matched with each other, and the convex shape on the first housing 11 and the concave shape on the seal ring 60 are matched with each other to form a mutually-fitting structure.

For example, the outer peripheral surface of the first housing 11 has a multi-step shape so as to have a plurality of steps 112 distributed along the vibration direction, and correspondingly, the inner peripheral surface of the seal ring 60 also has a multi-step shape so that they are fitted to each other, so that the contact area between them can be increased, and the connection stability and the sealing property can be improved. In addition, in other embodiments, the outer peripheral surface of the first housing 11 may be provided with an annular groove.

In one embodiment, the end surface of the sealing ring 60 facing away from the second housing 12, the end surface (the first end surface 111) of the first housing 11 facing away from the second housing 12, and the end surface of the edge portion 53 facing away from the flat voice coil 40 are flush with each other, so as to be able to contact with the casing 200 at the same time.

In one embodiment, the edge portion 53 and the first housing 11 are integrally formed and then integrally combined, and no glue is required to be applied between the edge portion 53 and the first housing 11, so that the high-grade waterproof requirement of an electronic device, such as a smart watch, can be met.

The edge portion 53 may be formed integrally with the first housing 11 in various manners, for example, the edge portion 53 may be formed integrally with the first housing 11 by injection molding or hot press molding. Specifically, the edge portion 53 is integrally formed with the housing 10 by an injection molding process using liquid silicone rubber. In this embodiment, the housing 10 is placed in a mold as an insert, and then the liquid silicone rubber is injected into the mold to form the diaphragm 50, and in the process of injecting the liquid silicone rubber, the liquid silicone rubber is combined with the housing 10, so as to connect the two.

Alternatively, the edge portion 53 is integrally formed with the housing 10 by a hot pressing process using one of solid silicone rubber, AEM rubber, or ACM rubber.

Referring to fig. 3 and 4, in an embodiment, the edge portion 53 is connected to an inner wall surface of the first casing 11, so that a surface of the edge portion 53 facing away from the flat voice coil 40 is flush with the first end surface 111 of the first casing 11 or lower than the first end surface 111. That is, similarly, the edge portion 53 does not protrude from the first end surface 111, and the position where the edge portion 53 is connected is on the inner wall surface of the first housing 11, so that it is possible to avoid an increase in the overall height of the speaker 100 (which refers to the vibration direction of the diaphragm 50).

Referring to fig. 4, fig. 6 and fig. 7 again, in order to increase the connection area between the first housing 11 and the diaphragm 50, in an embodiment, a connection rib 113 is disposed on the first housing 11, and the edge portion 53 is provided with a connection groove 54 matched with the connection rib 113. For example, the connecting rib 113 may be located on the inner wall surface of the first housing 11. The connecting rib 113 may also extend in the circumferential direction of the first housing 11. Through the cooperation of the connecting ribs 113 and the connecting grooves 54, a mutual embedding structure is formed between the first shell 11 and the edge portion 53 of the diaphragm 50, so that the edge portion 53 can be prevented from moving along the axial direction of the first shell 11, the contact area between the two is increased, and a better connecting effect on the edge portion 53 of the diaphragm 50 is realized.

The edge portion 53 has a first connecting section 531 and a second connecting section 532 which are distributed along the vibration direction and connected with each other, one end of the first connecting section 531 close to the second connecting section 532 is connected with the folded ring portion 52, and the second connecting section 532 is spaced from the folded ring portion 52 in the direction perpendicular to the vibration direction, so that the elasticity of the folded ring portion 52 can be improved, and the edge portion 53 can be prevented from blocking the up-and-down vibration of the folded ring portion 52. In addition, the first connection section 531 and the second connection section 532 are attached to the inner peripheral surface of the first housing 11, so that the edge portion 53 has a larger contact area with the first housing 11, and a better connection effect can be achieved.

In one embodiment, the surface of the first housing 11 facing away from the second housing 12 is curved. Specifically, the first housing 11 has a first end face 111 away from the second housing 12, and the first end face 111 is curved, so that the formed structure has a higher degree of fit with the casing 200 and a higher space utilization rate.

In this embodiment, the curvature direction of the first end surface 111 is the same as the curvature direction of the diaphragm 50, that is, the first end surface 111 also protrudes away from the flat voice coil 40. Optionally, the first end surface 111 has the same curvature as the diaphragm 50.

In addition, the first housing 11 may have a curved shape as a whole, that is, when the first end surface 111 of the first housing 11 and the surface facing the first end surface 111 are both curved and the curved directions are the same, the surface of the second housing 12 facing the first housing 11 is also curved.

In one embodiment, the center portion 51 and the edge portion 52 of the diaphragm 50 at the corresponding positions are lower than the first end surface 111, and a vibration gap is formed between the center portion 51 and the first end surface 111 along the vibration direction. In this embodiment, the central portion 51 and the folded ring portion 52 are lower than the first end surface 111, which means that the central portion 51 and the folded ring portion 52 are accommodated in the accommodating space formed by the housing 10 and do not protrude on the extending path of the first end surface 111 of the first housing 11. When the speaker 100 is mounted on the whole casing 200, the speaker 100 abuts against the whole casing 200 through the first casing 11 or the seal ring 60 on the first casing 11, and the center portion 51 and the edge portion 52 of the diaphragm 50 are spaced from the whole casing 200 through the vibration gap, which provides a large vibration space for the vibration of the center portion 51 and prevents the diaphragm 50 from interfering with the whole casing 200.

Referring to fig. 12, in an embodiment, the flat voice coil 40 has a sensing section 43 and two connecting sections 44 respectively disposed at two ends of the sensing section 43, the sensing section 43 is located in the magnetic gap 26, and the connecting sections 44 extend out of the magnetic gap 26 along the length direction of the magnetic gap 26. In this embodiment, the length of the first magnet portion 21 or the second magnet portion 22 is substantially equal to the length of the induction section 43, the induction section 43 is located in the magnetic field region, and the connection section 44 is located outside the magnetic field region. For example, the sensing section 43 is referred to as the long shaft section 41, and the connecting section 44 is referred to as the short shaft section 42. As such, the first magnet portion 21 or the second magnet portion 22 does not extend beyond the inner side of the short shaft section 42 of the flat voice coil 40.

Referring to fig. 10 to 13, in an embodiment, the speaker further includes a first bracket 61 and a second bracket 62 connecting the diaphragm 50 and the flat voice coil 40. In the invention, after the first support 61 and the second support 62 are arranged, the flat voice coil 40 can be supported by the first support 61 and the second support 62, and a plurality of supporting positions are provided, so that the condition that two ends of the flat voice coil 40 shake can be avoided, the polarization problem of a product is effectively solved, and the product performance is improved.

In the present embodiment, the first bracket 61 and the second bracket 62 are spaced apart in a direction perpendicular to the vibration direction. For example, the first and

second brackets

61 and 62 are distributed along the extending direction of the long axis section 41.

In an embodiment, the first support 61 and the second support 62 are respectively disposed near two opposite sides of the flat voice coil 40, the two opposite sides in this embodiment refer to two opposite sides along a radial direction of the flat voice coil 40, and the first support 61 and the second support 62 are distributed in a direction perpendicular to the vibration direction. Specifically, the speaker 100 is in an elongated shape, the flat voice coil 40 is correspondingly in an elongated shape to have a long axis section 41 and a short axis section 42, the long axis section 41 corresponds to a long side of the speaker 100, an extending direction of the long axis section 41 is perpendicular to the vibration direction, the short axis section 42 corresponds to a short side of the speaker 100, and the short axis section 42 extends along the vibration direction. The first bracket 61 and the second bracket 62 are distributed along the long shaft section 41, and the first bracket 61 and the second bracket 62 are respectively arranged at two ends of the long shaft section 41.

The first support 61 and the second support 62 are respectively arranged on two opposite sides of the flat voice coil 40 in the length direction, so that the flat voice coil 40 can be supported in the length direction, and the flat voice coil 40 is prevented from shaking better.

In one embodiment, the first support 61 and the second support 62 are respectively connected to two end surfaces of the flat voice coil 40. Specifically, the end face of the flat voice coil 40 refers to a surface extending around the axial direction thereof, and the two end faces refer to two surfaces distributed along the axial direction thereof. The first support 61 is connected to one end face of the flat voice coil 40, the second support 62 is connected to the other end face of the flat voice coil 40, and the first support 61 and the second support 62 sandwich the flat voice coil 40 therebetween to perform a bidirectional limiting function on the flat voice coil 40 in the axial direction of the flat voice coil 40.

The first support 61 and the second support 62 may have the same structure, and of course, the first support 61 and the second support 62 may have different structures, as long as the connection between the diaphragm 50 and the flat voice coil 40 can be realized to drive the diaphragm 50 to vibrate.

In one embodiment, the first bracket 61 and the second bracket 62 are located outside the magnetic gap 26 and connected to the corresponding connecting segments 44. Therefore, the first support 61 and the second support 62 do not occupy the space of the magnetic gap 26, the magnetic field intensity can be increased, and the performance is improved.

Please refer to fig. 14, the present invention further provides an electronic device, which includes a housing 200 and a speaker 100, and the structure of the speaker 100 is referred to the above embodiments and is not repeated herein. The electronic device may specifically be a wearable electronic device, such as a watch, and in addition, the electronic device may also be an earphone, a mobile phone, a notebook computer, a VR device, an AR device, a television, and the like.

The housing 200 may have a curved shape, and the curved direction of the housing 200 is the same as the curved direction of the diaphragm 50 of the loudspeaker 100. Alternatively, the curvature of the housing 200 is the same as the curvature of the diaphragm 50. So, the crooked radian of vibrating diaphragm 50 can agree with the crooked radian of shell 200 perfectly, forms an curved vibration space between the two, makes things convenient for the vibration of vibrating diaphragm 50, can promote space utilization by a wide margin.

When the first end surface 111 of the first casing 11 of the speaker 100 is curved, the shape of the entire speaker 100 is curved, so that the shape of the speaker 100 can be perfectly matched with the circular dial, the space utilization rate is greatly improved, and the performance of the speaker 100 is improved. Meanwhile, the arc-shaped appearance design of the loudspeaker 100 in the embodiment of the invention can not only improve the acoustic performance of the loudspeaker 100, but also shorten the sound outlet pipeline distance between the loudspeaker 100 and the dial plate sound outlet hole 201 of the watch, reduce airflow sound and improve the audio effect of the whole watch.

The following description takes an electronic device as a watch as an example:

fig. 16 and 17 are schematic diagrams illustrating a structure of a conventional speaker 100 'mounted on a circular dial plate, as can be seen from the diagrams, for a circular watch, since the conventional speaker 100' is of a straight-edge structure, and the surface of the side of the speaker 100 'where the diaphragm 50' is located is substantially a flat surface, when the speaker 100 'is mounted on the circular dial plate, the speaker cannot be well conformal and compatible, and the space waste is large, that is, a sector space is wasted between the first end 111 of the first casing 11 and the circular housing 200, which is not beneficial to improving the performance of the speaker 100', and further affects the sound output effect of the whole watch because the distance between the speaker 100 and the sound output hole 201 is long.

Fig. 14 shows a schematic structural diagram of the speaker 100 mounted on the circular dial in the embodiment of the present invention, and it is apparent from the figure that the curvature of the first end surface 111 of the first casing 11 of the speaker 100 can be matched with the circular housing 200 of the circular dial, that is, the first casing 11 of the speaker 100 can extend along the circular housing 200, and the two are in sealing abutment. So, after adopting first casing 11 of crooked shape, first casing 11 can get up the fan-shaped space rational utilization who wastes in the traditional architecture, regard this part space as the vibration space of vibrating diaphragm 50 to under the condition of the installation space of not increasing speaker 100, increased the vibration space of vibrating diaphragm 50, also increased the volume in the preceding sound chamber of speaker 100, be favorable to promoting acoustic performance. In addition, because the loudspeaker 100 can utilize the fan-shaped space as a part of the front sound cavity, the space directly faces the diaphragm 50, and the sound outlet holes 201 on the casing 200 can be directly opened facing the diaphragm 50, so that the sound is directly radiated without turning through the pipe section, thereby shortening the sound outlet pipe distance between the loudspeaker 100 and the dial sound outlet holes 201, reducing the airflow sound, and improving the audio effect of the whole machine.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A loudspeaker is characterized by comprising a shell, a vibration system and a magnetic circuit system, wherein the shell forms an accommodating space for accommodating and fixing the vibration system and the magnetic circuit system;

2. The loudspeaker of claim 1, wherein the first housing and the second housing are welded together by laser; or,

the first housing and the second housing are bonded by an adhesive layer.

3. The loudspeaker of claim 1, wherein the first housing has a sealing ring extending circumferentially thereon; the seal ring and the first shell are integrally formed.

4. The speaker of claim 3, wherein an outer peripheral surface of the first housing has a rugged structure, and an inner peripheral surface of the gasket is fitted to the outer peripheral surface of the first housing.

5. The loudspeaker of claim 1, wherein the number of conductive wire layers in the axial direction of the flat voice coil is smaller than the number of conductive wire layers in the radial direction of the flat voice coil.

6. The speaker of claim 1, wherein the edge portion is integrally injection molded or thermo-compression molded with the housing.

7. The loudspeaker of claim 6, wherein the rim portion is integrally formed with the housing by an injection molding process using liquid silicone rubber;

8. The speaker of claim 6, wherein the edge portion has a first connecting section and a second connecting section which are distributed along the vibration direction and connected to each other, one end of the first connecting section near the second connecting section is connected to the edge portion, the second connecting section is spaced from the edge portion in a direction perpendicular to the vibration direction, and both the first connecting section and the second connecting section are attached to an inner peripheral surface of the first housing.

9. A loudspeaker according to any one of claims 1 to 8, wherein the diaphragm is curved and projects away from the flat voice coil.

10. A loudspeaker as claimed in claim 9, characterized in that the first housing is curved and has an arc of curvature in the same direction as the curvature of the diaphragm.

11. The loudspeaker of claim 9, wherein the first magnet portion and the second magnet portion each comprise a first magnet;

12. The speaker of claim 9, further comprising: a first support and a second support connecting the diaphragm and the flat voice coil;

13. An electronic device comprising a housing and a loudspeaker according to any of claims 1-12, said loudspeaker being sealingly connected to said housing.