CN217470270U

CN217470270U - Magnetic circuit system, sound generating device and electronic equipment

Info

Publication number: CN217470270U
Application number: CN202221350502.3U
Authority: CN
Inventors: 庞庆龙; 周树芝
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-20
Anticipated expiration: 2032-05-31

Abstract

The utility model discloses a magnetic circuit, sound generating mechanism and electronic equipment, magnetic circuit includes magnetic yoke, central magnetic circuit part and limit magnetic circuit part, the magnetic yoke includes first magnetic conduction portion, second magnetic conduction portion and the connecting portion that is the components of a whole that can function independently structure, first magnetic conduction portion ring establish with the outside of second magnetic conduction portion, and lie in different planes with the second magnetic conduction portion, the connecting portion locate between first magnetic conduction portion and the second magnetic conduction portion, and connect first magnetic conduction portion and second magnetic conduction portion, the connecting portion is non-magnetic material; the central magnetic circuit part is arranged on the surface of the second magnetic conduction part facing the first magnetic conduction part; the side magnetic circuit part is arranged on the surface of the first magnetic conduction part facing the second magnetic conduction part, and a magnetic gap is formed between the side magnetic circuit part and the central magnetic circuit part. The magnetic circuit system of the utility model can improve the magnetic induction intensity of the region and enhance the magnetic line value.

Description

Magnetic circuit system, sound generating device and electronic equipment

Technical Field

The utility model relates to a sound generating mechanism technical field, in particular to magnetic circuit, sound generating mechanism and electronic equipment.

Background

With the rapid development of the consumer electronics industry, various intelligent terminals are in great demand. Consumer demand for products, such as audio functions, is increasing. At present, use one set of magnetic circuit system to provide drive power for two vibration systems usually in the two-sided sound generating mechanism structure, and support magnetic circuit's magnetic Yoke formula Yoke as an organic whole formula Yoke structure usually, its bearing structure who has plays the conduction effect to the line of magnetic induction of side magnetic circuit and central magnetic circuit, so, can weaken the regional magnetic induction intensity of voice coil loudspeaker voice coil, and then influence the sound generating mechanism performance.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a magnetic circuit aims at promoting sound generating mechanism's regional magnetic induction intensity, reinforcing magnetic force line value.

To achieve the above object, the present invention provides a magnetic circuit system including:

the magnetic conduction yoke comprises a first magnetic conduction part, a second magnetic conduction part and a connecting part which are of a split structure, the first magnetic conduction part is annularly arranged on the outer side of the second magnetic conduction part, the second magnetic conduction part and the first magnetic conduction part are positioned on different planes, the connecting part is arranged between the first magnetic conduction part and the second magnetic conduction part and is connected with the first magnetic conduction part and the second magnetic conduction part, and the connecting part is made of a non-magnetic conduction material;

a central magnetic circuit portion provided on a surface of the second magnetic conductive portion facing the first magnetic conductive portion; and

and the side magnetic circuit part is arranged on the surface of the first magnetic conduction part facing the second magnetic conduction part, and forms a magnetic gap with the central magnetic circuit part.

In one embodiment, the first magnetic conduction part and the second magnetic conduction part are both rectangular structures, and the connecting part is arranged on the inner side of the short shaft of the first magnetic conduction part; or the connecting part is arranged at the inner edge position of the first magnetic conduction part.

In an embodiment, the projection of the second magnetic conductive portion on the first magnetic conductive portion is not overlapped with the first magnetic conductive portion, each of the connecting portions includes a first connecting piece and a second connecting piece disposed at an included angle, one end of the first connecting piece, which is far away from the second connecting piece, is connected with the inner edge of the first magnetic conductive portion, and the end of the second connecting piece, which is far away from the first connecting piece, is connected with the outer edge of the second magnetic conductive portion.

In an embodiment, a slot is formed in one end of the first connecting piece, which is far away from the second connecting piece, and an inner edge of the first magnetic conduction part is inserted into the slot.

In one embodiment, the part of the second connecting piece, which is far away from the end part of the first connecting piece, is sunken towards the direction of the first connecting piece to form a supporting groove;

the groove side wall of the support groove is abutted against the side surface of the second magnetic conduction part, and the groove bottom of the support groove is abutted against the surface of the second magnetic conduction part facing the first magnetic conduction part;

and/or the groove bottom wall of the support groove is bonded on the surface of the second magnetic conduction part facing the first magnetic conduction part.

In an embodiment, the number of the connecting portions is four, and the four connecting portions are respectively disposed at four inner corners of the first magnetic conductive portion.

In one embodiment, the four connecting portions are arranged in axial symmetry with perpendicular planes of two opposite edges of the first magnetic conduction portion as axes.

In one embodiment, the central magnetic circuit portion includes a central magnet and a central magnetic yoke, the side magnetic circuit portion includes a side magnet and a side magnetic yoke, the central magnet is disposed on the surface of the second magnetic conductive portion, the central magnetic yoke is disposed on the surface of the central magnet facing away from the second magnetic conductive portion, the side magnet is disposed on the surface of the first magnetic conductive portion, and the side magnetic yoke is disposed on the surface of the side magnet facing away from the first magnetic conductive portion.

The utility model also provides a sound production device, which comprises a shell component;

a magnetic circuit system as described in any of the above, the magnetic circuit system being mounted within the housing assembly;

the first vibration system comprises a first diaphragm and a first voice coil;

a second vibration system comprising a second diaphragm and a second voice coil; and

the first vibrating diaphragm and the second vibrating diaphragm are respectively installed on two opposite surfaces of the shell component, the first voice coil is connected to the surface, facing the magnetic circuit system, of the first vibrating diaphragm, the second voice coil is connected to the surface, facing the magnetic circuit system, of the second vibrating diaphragm, and the first voice coil and the second voice coil are oppositely inserted into the magnetic gap.

In one embodiment, the housing assembly comprises a first housing and a second housing which are connected, the first vibration system is arranged on the surface of the first housing, which faces away from the second housing, and the second vibration system is arranged on the surface of the second housing, which faces away from the first housing;

the outer edge of the first magnetic conduction part is connected to the edges of the first shell and the second shell respectively.

In one embodiment, the outer edge of the first magnetic conduction part is bent and extended towards one side of the first shell to form a first insertion part, the edge of the first shell is provided with a first insertion hole, and the first insertion part is inserted into the first insertion hole;

and/or a second plug-in part is bent and extended from the outer edge of the first magnetic conduction part towards one side of the second shell, a second plug-in hole is formed in the second shell, and the second plug-in part is inserted into the second plug-in hole;

and/or one of the edge of the first shell and/or the edge of the second shell is provided with a positioning piece, the other is provided with a positioning hole, and the positioning piece is clamped in the positioning hole.

The utility model also provides an electronic equipment, electronic equipment includes the shell and locates sound generating mechanism in the shell, sound generating mechanism is as above arbitrary sound generating mechanism.

The utility model discloses technical scheme's magnetic circuit includes magnetic yoke, central magnetic circuit part and limit magnetic circuit part, and the magnetic yoke includes first magnetic conduction portion, second magnetic conduction portion and connects connecting portion between them, and first magnetic conduction portion is located to central magnetic circuit part towards the surface of second magnetic conduction portion, and limit magnetic circuit part is established on the surface of second magnetic conduction portion towards first magnetic conduction portion, and both intervals set up and form the magnetic gap. The magnetic yoke is arranged to be of a split structure, the connecting portion is arranged to be of a non-magnetic conducting material, conduction of magnetic lines of force can be reduced, and therefore the magnetic lines of force between the side magnetic circuit portion and the central magnetic circuit portion can be concentrated in the magnetic gap area, the magnetic line value is increased, and the acoustic performance is improved. Meanwhile, through the arrangement of the connecting part, the structure size for connecting the first magnetic conduction part and the second magnetic conduction part can be reduced, so that the weight of the product is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 view of an embodiment of the sound generating device of the present invention;

FIG. 2 is an exploded view of the sound generator of FIG. 1;

FIG. 3 is a schematic structural diagram of a magnetic yoke of the sound generating apparatus shown in FIG. 2;

FIG. 4 is an exploded view of the yoke of FIG. 3;

FIG. 5 is a top view of the magnetic yoke of FIG. 3;

fig. 6 is a cross-sectional view taken along line a-a of fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound producing device	2132	Second connecting piece
10	Shell assembly	2132a	Support groove
				11	First shell	22	Central magnetic circuit part
111	First plug hole	221	Center magnet
				112	Locating hole	222	Central magnetic conductive yoke
12	Second shell	23	Side magnetic circuit part
				121	Second plug hole	231	Edge magnet
122	Locating piece	232	Side magnetic yoke
				20	Magnetic circuit system	30	First vibration system
21	Magnetic conductive yoke	31	First diaphragm
				211	A first magnetic conductive part	32	First voice coil
2112	First plug-in part	33	First support sheet
				2113	Second plug part	40	Second vibration system
212	Second magnetic conductive part	41	Second diaphragm
				213	Connecting part	42	Second voice coil
2131	First connecting piece	43	Second support sheet
				2131a	Inserting groove

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a magnetic circuit and sound generating mechanism.

Referring to fig. 1 to fig. 3, in an embodiment of the present invention, a sound generating device 100 includes a housing assembly 10, a magnetic circuit system 20, a first vibration system 30, and a second vibration system 40;

here, the magnetic circuit system 20 is mounted on the housing assembly 10, the magnetic circuit system 20 includes a magnetic yoke 21, a central magnetic circuit portion 22, and a side magnetic circuit portion 23, the magnetic yoke 21 includes a first magnetic conductive portion 211, a second magnetic conductive portion 212, and a connecting portion 213, which are separate structures, the first magnetic conductive portion 211 is annularly disposed on an outer side of the second magnetic conductive portion 212, the second magnetic conductive portion 212 and the first magnetic conductive portion 211 are located on different planes, the connecting portion 213 is disposed between the first magnetic conductive portion 211 and the second magnetic conductive portion 212 and connects the first magnetic conductive portion 211 and the second magnetic conductive portion 212, and the connecting portion 213 is a non-magnetic conductive material;

the central magnetic circuit portion 22 is disposed on the surface of the second magnetic conductive portion 212 facing the first magnetic conductive portion 211; the side magnetic path portion 23 is provided on a surface of the first magnetic permeable portion 211 facing the second magnetic permeable portion 212, and forms a magnetic gap with the central magnetic path portion 22.

The first vibration system 30 includes a first diaphragm 31 and a first voice coil 32; the second vibration system 40 includes a second diaphragm 41 and a second voice coil 42; the first diaphragm 31 and the second diaphragm 41 are respectively mounted on two opposite surfaces of the housing assembly 10, the first voice coil 32 is connected to a surface of the first diaphragm 31 facing the magnetic circuit system 20, the second voice coil 42 is connected to a surface of the second diaphragm 41 facing the magnetic circuit system 20, and the first voice coil 32 and the second voice coil 42 are oppositely inserted into the magnetic gap.

In this embodiment, the housing assembly 10 is used for fixing the vibration system and the magnetic circuit system 20, playing a certain supporting role, and fixing the sound generating device 100 to the product to which it is applied. The housing assembly 10 may be made of plastic, and is convenient to process and has good structural stability. The housing assembly 10 may be a separate structure or an integrally formed structure, and is not limited herein. Casing subassembly 10 generally is the platykurtic, locates casing subassembly 10 at magnetic circuit 20, and two vibration system are located the basis of magnetic circuit 20 both sides respectively, can guarantee that sound generating mechanism 100's whole thickness can not be too big to reduce occupation space, be favorable to the miniaturization. The cross-sectional shape of the housing assembly 10 may be circular, square, polygonal, etc., and is not limited herein and may be set as desired.

Meanwhile, the first magnetic conduction part 211 and the second magnetic conduction part 212 of the magnetic conduction yoke 21 are made of magnetic conduction materials, such as iron, nickel, cobalt and the like, and can conduct magnetic line guidance on the central magnetic circuit part 22 and the side magnetic circuit part 23, so that the driving effect on the vibration system is improved, the first magnetic conduction part 211 can be in the shape of an annular cuboid plate, and therefore the shape of the cuboid plate is matched with that of the shell assembly 10, and the utilization rate of the space is improved. Of course, in other embodiments, when the housing assembly 10 is in the shape of a cylinder or other shapes, the first magnetic conductive part 211 can be in the shape of a disc or other shapes. In addition, the second magnetic conductive part 212 is also shaped like a rectangular parallelepiped plate, so that the occupation of the longitudinal space is reduced, and the shape of the second magnetic conductive part can be matched with that of the first magnetic conductive part 211, thereby improving the supporting effect on the central magnetic path part 22 and the side magnetic path part 23 and improving the driving force.

The connecting portion 213 is made of non-magnetic material, such as plastic, and can be integrally formed by injection molding, so that the processing is convenient, the production efficiency is improved, and the cost is effectively saved. Alternatively, the material may be ceramic or other metal other than iron, nickel, or cobalt, and the structural strength is high, so that the connection strength can be improved. The connecting portion 213 may be one, two or more, and may serve to connect and fix the first magnetic conductive portion 211 and the second magnetic conductive portion 212. Except for the connecting part 213, the first magnetic conduction part 211 and the second magnetic conduction part 212 are not in a plane, so a space and an opening are formed between the two parts, and after the central magnetic circuit part 22 and the side magnetic circuit part 23 are installed, a formed magnetic gap is a communicated integral space, so that the voice coils of the two vibration systems can be conveniently inserted.

The utility model discloses technical scheme's magnetic circuit 20 includes magnetic conduction yoke 21, central magnetic circuit part 22 and limit magnetic circuit part 23, and magnetic conduction yoke 21 includes first magnetic conduction portion 211, second magnetic conduction portion 212 and connects connecting portion 213 between them, and first magnetic conduction portion 211 is located towards the surface of second magnetic conduction portion 212 to central magnetic circuit part 22, and limit magnetic circuit part 23 is established on second magnetic conduction portion 212 towards the surface of first magnetic conduction portion 211, and both intervals set up and form the magnetic gap. The magnetic yoke 21 is arranged to be of a split structure, the connecting portion 213 is arranged to be of a non-magnetic material, conduction of magnetic lines of force can be reduced, and therefore the magnetic lines of force between the side magnetic circuit portion 23 and the central magnetic circuit portion 22 are more concentrated in a magnetic gap area, the magnetic line of force value is increased, and acoustic performance is improved. Meanwhile, the connecting part 213 can reduce the size of the structure connecting the first magnetic conduction part 211 and the second magnetic conduction part 212, thereby reducing the weight of the product.

It can be understood that the first diaphragm 31 and the second diaphragm 41 are respectively mounted on two opposite surfaces of the housing assembly 10, the first voice coil 32 and the second voice coil 42 are oppositely inserted into the magnetic gap, and after the first voice coil 32 and the second voice coil 42 are both connected and conducted with an external circuit, a current is introduced into the magnetic circuit system 20 to form a magnetic field, so that the first voice coil 32 and the second voice coil 42 move in the magnetic gap to respectively drive the first diaphragm 31 and the second diaphragm 41 to vibrate, thereby realizing a two-sided sound production.

Here, the first magnetic conductive portion is formed in an annular rectangular parallelepiped shape, and therefore, the first magnetic conductive portion has two short axis sides and two long axis sides, the second magnetic conductive portion is also formed in a rectangular parallelepiped plate shape, the connecting portion is only provided on the inner side edge of the short axis of the first magnetic conductive portion, and the two connecting portions may be respectively provided in the middle portions of the two short axes, thereby achieving a stable supporting effect. Of course, also can set up two connecting portion in the interior edge angular position of two diagonal of first magnetic conduction portion, the diagonal position of first magnetic conduction portion promptly to also can promote the stability of connecting, and further reduce the occupation to the magnetic gap, promote magnetic circuit's drive effect.

With reference to fig. 5 and fig. 6, in an embodiment, a projection of the second magnetic conductive portion 212 on the first magnetic conductive portion 211 is not overlapped with the first magnetic conductive portion 211, each of the connecting portions 213 includes a first connecting piece 2131 and a second connecting piece 2132 arranged at an included angle, one end of the first connecting piece 2131 far away from the second connecting piece 2132 is connected to an inner edge of the first magnetic conductive portion 211, and an end of the second connecting piece 2132 far away from the first connecting piece 2131 is connected to an outer edge of the second magnetic conductive portion 212.

In the present embodiment, in order to avoid the first voice coil 32 as much as possible, the projection of the second magnetic conductive portion 212 on the first magnetic conductive portion 211 does not overlap the first magnetic conductive portion 211, so that when the side magnetic path portion 23 is provided at the periphery of the first magnetic conductive portion 211, a space through which the first voice coil 32 passes is formed between the side magnetic path portion and the second magnetic conductive portion 212, thereby avoiding interference, increasing the volume of the side magnetic path portion 23, and further increasing the magnetic driving force. Similarly, when the central magnetic circuit portion 22 is disposed on the second magnetic conductive portion 212, a space for the second voice coil 42 to pass through is also formed with the inner edge of the first magnetic conductive portion 211, so as to avoid interference.

At this time, in order to improve connection stability, the connection portion 213 includes the first connection member 2131 and the second connection member 2132 which are disposed at an included angle, so that a stable connection relationship between the end portion of the first connection member 2131 and the edge of the first magnetic conduction portion 211 can be achieved, the butt area can be increased, the connection area between the second connection member 2132 and the second magnetic conduction portion 212 can be increased, and connection strength can be improved. Here, the angle between the first connecting piece 2131 and the second connecting piece 2132 may be 90 °, that is, the first connecting piece 2131 and the second connecting piece 2132 are disposed perpendicularly, so that the first connecting piece 2131 and the edge of the first magnetic conductive part 211 can be butted in parallel, and the second connecting piece 2132 and the second magnetic conductive part 212 can be butted perpendicularly, thereby achieving a better connection effect. Of course, the connection angle between the two may be any value between 90 ° and 100 °, for example, 95 °, and the like, and is not limited herein. Here, first connecting piece 2131 and second connecting piece 2132 are integrated into one piece structure, for example, mould plastics integrated into one piece, and processing is convenient, and can promote structural strength, guarantees its stable connection effect. The cross section of the connecting portion 213 may be square for easy processing, and of course, the cross section may also be circular or polygonal.

Of course, in other embodiments, the connecting portion 213 may also be a column, and the end surfaces of the two ends thereof are disposed at an angle to the extending length thereof. Alternatively, in another embodiment, when the projection of the second magnetic conductive part 212 on the first magnetic conductive part 211 partially overlaps the first magnetic conductive part 211, the connection part 213 may also be a column or include two parts disposed at an acute angle.

With reference to fig. 5 and fig. 6, in an embodiment, an insertion groove 2131a is formed in an end of the first connecting member 2131 away from the second connecting member 2132, and an inner edge of the first magnetic conductive portion 211 is inserted into the insertion groove 2131 a.

In this embodiment, for convenience of connection, the first connecting element 2131 is connected with the first magnetic conductive part 211 in an inserting manner, that is, one end of the first connecting element 2131 is provided with an inserting slot 2131a, and an inner edge of the first magnetic conductive part 211 is inserted into the inserting slot 2131a for fixation. Specifically, two oppositely arranged clamping blocks are formed at one end of the first connecting member 2131, and the two clamping blocks enclose to form the slot 2131a, so that the edge of the first magnetic conductive part 211 is stably fixed. Of course, the inner edge of the first magnetic conductive part 211 may be provided with a hole, and the end of the first connecting piece 2131 may be directly inserted and fixed. Alternatively, in other embodiments, the connection manner between the first connecting element 2131 and the inner edge of the first magnetic conductive portion 211 may also be a snap connection or a screw connection. Certainly, in order to further improve the stability, the glue can be dispensed at the part where the two are inserted, so that the splicing and the bonding are carried out at the same time, and the connection stability is ensured.

Referring to fig. 6 again, in an embodiment, a portion of the second connecting member 2132, which is away from the end of the first connecting member 2131, is recessed toward the first connecting member 2131 to form a supporting groove 2132 a;

the groove side wall of the support groove 2132a abuts against the side surface of the second magnetic conduction part 212, and the groove bottom of the support groove 2132a abuts against the surface of the second magnetic conduction part 212 facing the first magnetic conduction part 211;

and/or, the bottom wall of the support groove 2132a is adhered to the surface of the second magnetic conduction part 212 facing the first magnetic conduction part 211.

In this embodiment, in order to effectively support the second magnetic conductive part 212, an end portion of the second connecting member 2132 is perpendicular to the first connecting member 2131 and perpendicular to the second magnetic conductive part 212, and a part of the end portion of the second connecting member 2132 is recessed toward the first connecting member 2131, so that the recessed structure and the original end portion structure enclose to form a supporting groove 2132a, the recessed structure is a groove bottom of the supporting groove 2132a, and a side portion of the end portion structure is a groove side wall of the supporting groove 2132 a. In one embodiment, when two connection portions 213 are provided, the groove bottoms of the support grooves 2132a abut against the surface of the second magnetic conductive portion 212, the groove side walls of the support grooves 2132a abut against the side surfaces of the second magnetic conductive portion 212, and the groove side walls of the two support grooves 2132a can be engaged with the opposite side surfaces of the second magnetic conductive portion 212 in a snap-fit manner, thereby realizing a stable connection structure.

Of course, in another embodiment, the groove bottom of the support groove 2132a may be bonded to the surface of the second magnetic conductive part 212 facing the first magnetic conductive part 211 to form a stable connection structure, and the number of the connection parts 213 is not limited to one, two or more. Of course, the second magnetic conductive portion 212 may be bonded to the groove side wall of the support groove 2132a, thereby further improving the support stability.

Of course, in other embodiments, the connection manner of the second connecting element 2132 and the second magnetic conductive part 212 may also be a snap connection, a screw connection, a welding connection, or other connection manners.

Referring to fig. 3 and 4, in an embodiment, four connecting portions 213 are disposed, and the four connecting portions 213 are disposed at four inner corners of the first magnetic conductive portion 211, respectively.

In this embodiment, when the first magnetic conduction part 211 is a rectangular structure, at this time, the second magnetic conduction part 212 is also a rectangular parallelepiped, in order to improve the structural stability, four connection parts 213 are provided, and the four connection parts 213 are respectively provided at four inner corners of the first magnetic conduction part 211, thereby forming a more stable supporting effect.

Here, an included angle is formed between the first magnetic conductive parts 211 of the two connecting parts 213 located on the short side, and the included angle may be greater than an acute angle included angle of a diagonal line of the first magnetic conductive parts 211, thereby effectively improving structural stability.

Referring to fig. 4 and 5, in an embodiment, the four connecting portions 213 are disposed axially symmetrically with respect to a perpendicular plane of two opposite edges of the first magnetic conductive portion 211.

In this embodiment, in order to improve the connection uniformity, the four connecting portions 213 are symmetrically disposed with respect to the perpendicular planes of the two opposite edges of the first magnetic conductive portion 211, that is, the two connecting portions 213 on the two long sides are disposed with respect to the perpendicular planes of the two long edges of the first magnetic conductive portion 211 as the symmetric planes, and the two connecting portions 213 on the two short sides are disposed with respect to the perpendicular planes of the two short edges of the first magnetic conductive portion 211 as the symmetric planes, so as to achieve a stable and uniform supporting effect and improve the stability of the magnetic circuit system 20.

In addition, protruding portions extend horizontally from two short inner edges of the first magnetic conductive portion 211, and the projection of the second magnetic conductive portion 212 on the first magnetic conductive portion 211 abuts against the edges of the protruding portions, so that the distance between the short side portion of the side magnetic path portion 23 and the central magnetic path portion 22 can be further shortened, and the magnetic induction intensity can be improved.

Referring to fig. 2, in an embodiment, the central magnetic circuit portion 22 includes a central magnet 221 and a central magnetic yoke 222, the side magnetic circuit portion 23 includes a side magnet 231 and a side magnetic yoke 232, the central magnet 221 is disposed on the surface of the second magnetic conductive portion 212, the central magnetic yoke 222 is disposed on the surface of the central magnet 221 facing away from the second magnetic conductive portion 212, the side magnet 231 is disposed on the surface of the first magnetic conductive portion 211, and the side magnetic yoke 232 is disposed on the surface of the side magnet 231 facing away from the first magnetic conductive portion 211.

In this embodiment, the central magnetic circuit portion 22 includes a central magnet 221 and a central magnetic yoke 222, the central magnet 221 is disposed on the surface of the second magnetic conductive portion 212, the connection manner between the central magnet 221 and the second magnetic conductive portion 212 may be adhesion, the central magnetic yoke 222 is disposed on the surface of the central magnet 221 away from the second magnetic conductive portion 212, and together with the second magnetic conductive portion 212, the magnetic effect of the central magnetic circuit portion 22 is jointly improved, the cross-sectional area of the central magnetic yoke 222 may be slightly larger than the cross-sectional area of the central magnet 221, and the width of the second magnetic conductive portion 212 is larger than the width of the central magnet 221, so that the magnetic lines of force of the central magnet 221 can be conveniently guided into the magnetic gap, and the driving force for the first voice coil 32 and the second voice coil 42 is improved. Meanwhile, the side magnetic circuit portion 23 includes the side magnet 231 and the side magnetic yoke 232, further increasing the amount of magnetic lines of force of the side magnet 231, and reducing the magnetic flux leakage phenomenon, thereby ensuring the vibration effect of the voice coil, and improving the acoustic performance. Here, the side magnets 231 are of a separate structure, that is, the short side magnets 231 are provided at the short sides of the first magnetic permeable part 211, and the long side magnets 231 are provided at the long sides thereof, so that the connection part 213 and other structures can be avoided. Meanwhile, the long-side magnet 231 is also provided with two sections, so that the processing is convenient.

Of course, after the sound generating device 100 includes the magnetic circuit system 20 of the above embodiment, the sound generating device 100 also has the above effects, which are not described herein again.

Referring to fig. 1 and fig. 2, in an embodiment, the housing assembly 10 includes a first housing 11 and a second housing 12 connected to each other, the first vibration system 30 is disposed on a surface of the first housing 11 facing away from the second housing 12, and the second vibration system 40 is disposed on a surface of the second housing 12 facing away from the first housing 11;

the outer edge of the first magnetic conductive part 211 is connected to the edges of the first casing 11 and the second casing 12, respectively.

In this embodiment, the housing assembly 10 includes the first housing 1111 and the second housing 12 detachably connected to each other, so as to facilitate the assembly of the internal magnetic circuit system 20. The connection mode of the two can be snap, adhesion or welding, etc., and is not limited herein. Specifically, the first housing 11 is disposed in a ring shape, and the outer periphery thereof may be used to fix the first vibration system 30, the first magnetic conductive part 211, and the second housing 12. And the inner circumference is connected with the side magnetic yoke 232, thereby realizing the magnetic line guidance to the side magnet 231, enhancing the strength of the magnetic line, and ensuring the driving effect. Here, optionally, the material of limit magnetic yoke 232 is conductive metal, and the material of first casing 11 can be plastics, and both can be through integrative injection moulding to effectively guarantee structural strength and stability, and convenient processing.

The second housing 12 is also annular, and has one side surface for connection with the first housing 11 and the first magnetic conductive part 211 and the other side surface for connection with the second vibration system 40. The first magnetic conductive part 211 is respectively connected with the first casing 11 and the second casing 12, so as to improve the stability of the overall structure of the sound generating device 100.

Referring to fig. 2 and fig. 3, in an embodiment, an outer edge of the first magnetic conductive portion 211 is bent and extended toward one side of the first housing 11 to form a first inserting portion 2112, an edge of the first housing 11 is provided with a first inserting hole 111, and the first inserting portion 2112 is inserted into the first inserting hole 111;

and/or a second inserting portion 2113 is bent and extended from the outer edge of the first magnetic conduction portion 211 toward one side of the second housing 12, the second housing 12 is provided with a second inserting hole 121, and the second inserting portion 2113 is inserted into the second inserting hole 121;

and/or, one of the edge of the first housing 11 and/or the edge of the second housing 12 is provided with a positioning member 122, and the other is provided with a positioning hole 112, and the positioning member 122 is clamped in the positioning hole 112.

In this embodiment, in order to facilitate assembling the magnetic yoke 21 and the housing assembly 10, the first magnetic conductive portion 211 and the first housing 11 are arranged to be inserted, the outer edge of the first magnetic conductive portion 211 is bent toward one side of the first housing 11 to form a first insertion portion 2112, and the first housing 11 is correspondingly provided with a first insertion hole 111, so as to achieve insertion and fixation. Of course, in other embodiments, the connection may be made by bonding or other means. Or the first housing 11 is provided with a protruding insertion part, and the edge of the first magnetic conductive part 211 is provided with an opening matched with the insertion part. Here, the first inserting portion 2112 is provided with four and is respectively close to four corners of the first magnetic conductive portion 211, so that the connection stability and uniformity are improved.

The edge of the first magnetic conduction part 211 is provided with a first inserting part 2112, and the edge of the first magnetic conduction part 211 is also provided with a second inserting part 2113, the second inserting part 2113 is bent towards the second housing 12 and is arranged at an interval with the first inserting part 2112, and the second housing 12 is provided with a corresponding second inserting hole 121, so that the inserting fixation of the first inserting part 2112 and the second inserting part is realized. Here, the second socket portion 2113 extends in the longitudinal direction of the first magnetic conductive portion 211, and the connection stability is further improved. Optionally, the second inserting-connecting portions 2113 are provided in a plurality, the second inserting-connecting portions 2113 are arranged at intervals in the length direction of the first magnetic conduction portion 211 and are located between the two first inserting-connecting portions 2112, for example, three second inserting-connecting portions 2113 are provided on two long sides, and the perpendicular planes of the short sides are used as axisymmetrical arrangements, so that the structural stability is further improved. Of course, the second socket portion 2113 may be provided separately without providing the first socket portion 2112.

In addition, in order to further improve the structural stability and the installation convenience, a positioning hole 112 is provided on the first housing 11, and a positioning member 122, for example, a positioning protrusion, is provided on the second housing 12, and the positioning member 122 is inserted into the positioning hole 112 to achieve positioning and fixing. Of course, on this basis, the dispensing process can also be performed on the positioning member 122, so that the effect of adhesion is realized while inserting, and the structural stability is further improved. Of course, in other embodiments, the positioning member 122 may be disposed on the first housing 11, and the second housing 12 may have a hole, so as to achieve the connection.

Here, when the first casing 11 and the second casing 12 are butt-joined, the side magnetic path portion 23 provided in the yoke 21 is partially interposed between edges of the first casing 11 and the second casing 12, that is, the short-side magnet 231 is interposed between short sides of the first casing 11 and the second casing 12, the long-side magnet 231 is interposed between long sides of the first casing 11 and the second casing 12, and a gap between the first casing 11 and the second casing 12 can be a sound-emitting gap.

Referring to fig. 2, in addition, in an alternative embodiment, the first diaphragm 31 includes a first central portion and a first flange portion, the second diaphragm 41 includes a second central portion and a second flange portion, an outer peripheral edge of the first flange portion is connected to an outer edge of the first casing 11, an inner peripheral edge of the first flange portion is connected to the first central portion, an outer peripheral edge of the second flange portion is connected to an outer edge of the second casing 12, and an inner peripheral edge of the second flange portion is connected to the second central portion, where the first flange portion and the second flange portion are both recessed toward a direction away from the magnetic circuit system 20, so that the structure can be simplified, and interference of internal structures can be avoided. It can be understood that the central portion is planar for being connected with the voice coil loudspeaker voice coil, and realize vibration from top to bottom, and the dog-ear portion encircles the central portion setting, and the dog-ear portion keeps away from one side of central portion and is connected fixedly with housing assembly 10, thereby realizes the installation of vibrating diaphragm, and the dog-ear portion vibrates along with the central portion, thereby can promote the vibration stability of voice coil loudspeaker voice coil, makes it keep reciprocating along its axis direction. The materials of the central part and the bending ring part can be selected to be different so as to ensure the smoothness and the stability of the vibration of the vibrating diaphragm.

In order to further ensure the position of the first voice coil 32 in the magnetic gap and ensure that the moving direction only vibrates up and down along the axial direction, so as to reduce distortion, the sound generating device 100 further comprises a first support piece 33, the center position of one surface of the first support piece 33 is connected with the first voice coil 32, the outer peripheral edge is fixed on the housing component 10, the other surface is connected with the edge of the first vibrating diaphragm 31, and the first voice coil 32 has certain elastic deformation, so that the normal vibration of the first voice coil 32 is not affected. Similarly, the sound generating device 100 further includes a second supporting piece 43, the center of one surface of the second supporting piece 43 is connected to the second voice coil 42, the other surface is connected to the edge of the second vibrating diaphragm 41, and the outer peripheral edge of the second supporting piece 43 is connected to the housing assembly 10, so that the second voice coil 42 can be supported well, and the structural stability is improved. Here, first branch piece 33 and second branch piece 43 can be set to be the plane elastic component of integrated into one piece, compare in the structure of playing the ripples, can reduce sound generating mechanism 100 height in its vibration orientation to reduce sound generating mechanism 100's volume, realize sound generating mechanism 100's miniaturization more easily, and can show improvement structural stability, effectively reduce the fracture risk.

In order to fix the sound generating device 100 and facilitate connection with an external circuit, two first fixing ends are formed at the periphery of the first casing 11, and corresponding second fixing ends are also formed at the periphery of the second casing 12, and the flexible circuit board is used for connection, one end of the flexible circuit board is connected with the first branch piece 33 and the second branch piece 43, and the other end of the flexible circuit board extends to the first fixing end and the second fixing end, so that the flexible circuit board is used as a supporting point for connection with an external circuit, and the connection efficiency is improved.

The utility model discloses still provide an electronic equipment (not shown), electronic equipment includes the shell and locates the sound generating mechanism 100 of shell, sound generating mechanism 100 be as above sound generating mechanism 100. Since the sound generating device 100 of the electronic device adopts all technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

Here, the electronic device may be a sound box, a mobile phone, an earphone, and the like, which is not limited herein. Of course, the electronic device may also be applied in a vehicle as the in-vehicle sound generating apparatus 100, the consumer sound generating apparatus 100, or the like.

The above is only the optional embodiment of the present invention, and not therefore the patent scope of the present invention is limited, all under the idea of the present invention, the equivalent structure transformation made by the contents of the specification and the attached drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. A magnetic circuit system, comprising:

the magnetic conduction yoke comprises a first magnetic conduction part, a second magnetic conduction part and a connecting part, the first magnetic conduction part and the second magnetic conduction part are of a split structure, the first magnetic conduction part is arranged on the outer side of the second magnetic conduction part in a surrounding mode, the second magnetic conduction part and the first magnetic conduction part are located on different planes, the connecting part is arranged between the first magnetic conduction part and the second magnetic conduction part and is connected with the first magnetic conduction part and the second magnetic conduction part, and the connecting part is made of a non-magnetic conduction material;

2. The magnetic circuit system according to claim 1, wherein the first and second magnetically permeable portions are each rectangular in configuration, and the connecting portion is disposed inside a minor axis of the first magnetically permeable portion; or the connecting part is arranged at the inner edge position of the first magnetic conduction part.

3. The magnetic circuit system according to claim 1, wherein the projection of the second magnetic conductive portion on the first magnetic conductive portion is not overlapped with the first magnetic conductive portion, the connecting portion includes a first connecting member and a second connecting member disposed at an included angle, an end of the first connecting member away from the second connecting member is connected to an inner edge of the first magnetic conductive portion, and an end of the second connecting member away from the first connecting member is connected to an outer edge of the second magnetic conductive portion.

4. The magnetic circuit system according to claim 3, wherein an end of the first connecting member away from the second connecting member is formed with a slot, and an inner edge of the first magnetic conductive portion is inserted into the slot.

5. The magnetic circuit system according to claim 3, wherein a portion of the end of the second connecting member remote from the first connecting member is recessed toward the first connecting member to form a support groove;

6. The magnetic circuit system according to any one of claims 2 to 5, wherein there are four connecting portions, and four connecting portions are respectively disposed at four inner corners of the first magnetically permeable portion.

7. The magnetic circuit system according to claim 6, wherein four of the connecting portions are disposed in axial symmetry with respect to perpendicular planes on opposite edges of the first magnetically permeable portion.

8. The magnetic circuit system according to claim 1, wherein the central magnetic circuit portion includes a central magnet and a central yoke, the side magnetic circuit portion includes a side magnet and a side yoke, the central magnet is disposed on a surface of the second magnetic conductive portion, the central yoke is disposed on a surface of the central magnet facing away from the second magnetic conductive portion, the side magnet is disposed on a surface of the first magnetic conductive portion, and the side yoke is disposed on a surface of the side magnet facing away from the first magnetic conductive portion.

9. A sound generating device, the sound generating device comprising:

a housing assembly;

a magnetic circuit system as claimed in any one of claims 1 to 8, the magnetic circuit system being mounted within the housing assembly;

the first vibration system comprises a first diaphragm and a first voice coil;

10. The sound generating apparatus as claimed in claim 9, wherein said housing assembly comprises a first housing and a second housing connected to each other, said first vibration system being disposed on a surface of said first housing facing away from said second housing, said second vibration system being disposed on a surface of said second housing facing away from said first housing;

11. The sound generating device according to claim 10, wherein the outer edge of the first magnetic conductive portion is bent and extended toward one side of the first housing to form a first inserting portion, the edge of the first housing is provided with a first inserting hole, and the first inserting portion is inserted into the first inserting hole;

12. An electronic device, comprising a housing and a sound generating device disposed in the housing, wherein the sound generating device is the sound generating device according to any one of claims 1 to 11.