CN218679356U - Sound production device and electronic equipment - Google Patents

Abstract

The utility model discloses a sound generating device, including casing, magnetic circuit, first vibration system and second vibration system. Wherein, magnetic circuit's relative both sides are located to first vibration system and second vibration system, first vibration system includes first vibrating diaphragm subassembly and first voice coil loudspeaker voice coil, second vibration system includes second vibrating diaphragm subassembly and second voice coil loudspeaker voice coil, magnetic circuit's first magnetic gap and second magnetic gap interval set up and first magnetic gap is located the circumference outside in second magnetic gap, the one end and the first vibrating diaphragm subassembly of first voice coil loudspeaker voice coil are connected, the other end of first voice coil loudspeaker voice coil is inserted and is located in the first magnetic gap, the one end and the second vibrating diaphragm subassembly of second voice coil loudspeaker voice coil are connected, the other end of second voice coil loudspeaker voice coil is inserted and is located in the second magnetic gap. Along the vibration direction of first vibration system and second vibration system, extension height H1 of first voice coil loudspeaker voice coil and extension height H2 of second voice coil loudspeaker voice coil satisfy the relation: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4. The utility model discloses a sound generating mechanism has the good advantage of two-sided sound production uniformity.

Description

Sound production device and electronic equipment

Technical Field

The utility model relates to an electroacoustic technology field, in particular to sound generating mechanism and electronic equipment.

Background

A speaker is a transducer for converting an electrical signal into an acoustic signal, and is widely used in electronic devices such as mobile phones and computers. With the demand of miniaturization and thinning of electronic devices, the speaker is gradually moving toward miniaturization and thinning, but with the demand of users, the speaker is pursuing high loudness and low distortion in performance. In order to meet the above requirements, some double-sided sound speakers have been developed, and the internal structure of the double-sided sound speaker is a common magnetic circuit system structure, that is, the magnetic circuit system is provided with two magnetic gaps, and the voice coils in the two sets of vibration systems are respectively inserted into the corresponding magnetic gaps, so as to achieve the purpose of reducing the thickness of the double-sided sound speaker.

However, the diaphragms on the two sides of the magnetic circuit system of the double-sided sound-producing speaker are driven by the voice coils corresponding to the diaphragms to produce sound respectively, the diaphragms are limited by the structure of the shared magnetic circuit system, and the voice coils in the two sets of vibration systems cannot be designed into completely consistent sizes, so that the BL values of the two sets of vibration systems are relatively poor in consistency, the double-sided sound-producing consistency of the double-sided sound-producing speaker is relatively poor, and the sound-producing effect of the double-sided sound-producing speaker is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a sound generating device, sound generating device has the good advantage of two-sided sound production uniformity.

The utility model discloses still provide an electronic equipment who has above-mentioned sound generating mechanism.

According to the utility model discloses sound generating mechanism of first aspect embodiment, include: a housing; a magnetic circuit system fixed to the housing; the vibration isolation structure comprises a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are arranged on two opposite sides of the magnetic circuit system, the first vibration system comprises a first vibrating diaphragm component and a first voice coil, the second vibration system comprises a second vibrating diaphragm component and a second voice coil, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap, the first magnetic gap and the second magnetic gap are arranged at intervals and are positioned on the circumferential outer side of the second magnetic gap, one end of the first voice coil is connected with the first vibrating diaphragm component, the other end of the first voice coil is inserted into the first magnetic gap, one end of the second voice coil is connected with the second vibrating diaphragm component, and the other end of the second voice coil is inserted into the second magnetic gap; wherein, along the vibration direction of the first vibration system and the second vibration system, the extension height H1 of the first voice coil and the extension height H2 of the second voice coil satisfy the relation: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4.

According to the utility model discloses sound generating mechanism of first aspect embodiment, the extension H1 through setting up first voice coil loudspeaker voice coil and the extension H2 of second voice coil loudspeaker voice coil satisfy the relational expression: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4, so that the non-linear degree of the BLX of the first voice coil and the BLX of the second voice coil are approximately consistent, and under the condition of matching the same KMS, the THD of the first vibration system and the THD of the second vibration system are approximately consistent, so that the double-sided sound production consistency of the sound production device can be greatly improved, and the sound production effect of the sound production device can be further improved.

According to some embodiments of the utility model, magnetic circuit includes magnetic yoke, central magnetism portion and limit magnetism portion, the magnetic yoke includes first supporting part, connecting portion and second supporting part, the central point of first supporting part puts and is equipped with the mounting hole, the both ends of connecting portion respectively with first supporting part with the second supporting part is connected, the second supporting part with the mounting hole just right just with first supporting part is located the plane of difference, central magnetism portion locates the second supporting part is close to one side of mounting hole, limit magnetism portion locates first supporting part is close to one side of second supporting part, limit magnetism portion with form between the second supporting part first magnetic gap, central magnetism portion with form between the first supporting part second magnetic gap.

In some embodiments of the present invention, the central magnetic portion includes a central magnet and a central washer, the central magnet is disposed on the second supporting portion, and the central washer is disposed on a side of the central magnet away from the second supporting portion; the side magnet part comprises a side magnet and a side washer, the side magnet is arranged on the first supporting part, and the side washer is arranged on one side, away from the first supporting part, of the side magnet.

In some embodiments of the present invention, the first voice coil is close to one side of the first diaphragm assembly and the side washer is close to the distance between one side of the first diaphragm assembly is D1, the second voice coil is close to one side of the second diaphragm assembly and the center washer are close to the distance between one side of the second diaphragm assembly is D2, D1 and D2 satisfy the following relation: D1/D2 is more than or equal to 1/3 and less than or equal to 3.

In some embodiments of the utility model, the first voice coil loudspeaker voice coil is kept away from one side of first vibrating diaphragm subassembly with side china department keeps away from interval between one side of first vibrating diaphragm subassembly is D3, the second voice coil loudspeaker voice coil is kept away from one side of second vibrating diaphragm subassembly and center china department keep away from interval between one side of second vibrating diaphragm subassembly is D4, and D3 and D4 satisfy the relational expression: D3/D4 is more than or equal to 1/3 and less than or equal to 3.

In some embodiments of the present invention, along the vibration direction of the first vibration system and the second vibration system, the extension height L1 of the edge magnet and the extension height L2 of the center magnet satisfy the relation: L1/L2 is more than or equal to 3/4 and less than or equal to 4/3.

In some embodiments of the present invention, along the vibration direction of the first vibration system and the second vibration system, the thickness W1 of the center washer and the thickness W2 of the edge washer satisfy the following relation: W1/W2 is more than or equal to 1/2 and less than or equal to 2.

In some embodiments of the present invention, at least two opposite sides of the connecting portion are provided with a hollow hole; and/or, limit magnet is a plurality of, limit china department includes main part and a plurality of china department that integrated into one piece set up, the main part is fixed in the casing, it is a plurality of china department all locates main part and orientation are close to the direction of central magnetic part extends, every china department locates respectively and corresponds limit magnet is kept away from one side of first supporting part.

According to the utility model discloses a some embodiments, first voice coil loudspeaker voice coil prolongs its radial direction's thickness and is T1, the second voice coil loudspeaker voice coil prolongs its radial direction's thickness and is T2, and T1 and T2 satisfy the relational expression: T1/T2 is more than or equal to 1/2 and less than or equal to 2.

According to the utility model discloses electronic equipment of second aspect embodiment, include according to the utility model discloses above-mentioned first aspect embodiment's sound generating mechanism.

According to the utility model discloses electronic equipment of second aspect embodiment, through the sound generating mechanism who sets up above-mentioned embodiment, sound generating mechanism sets up the extension height H1 of its first voice coil loudspeaker voice coil and the extension height H2 of second voice coil loudspeaker voice coil and satisfies the relational expression: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4, so that the double-sided sounding consistency of the sounding device can be greatly improved, and the audio quality of the electronic equipment can be improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

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 overall structure diagram of a sound generating device according to an embodiment of the present invention;

fig. 2 is an exploded view of the sound generating device according to an embodiment of the present invention;

fig. 3 is a vertical cross-sectional view of a sound emitting device according to an embodiment of the present invention, taken along a first direction;

fig. 4 is a vertical cross-sectional view of a sound emitting device according to an embodiment of the present invention, taken along a first direction;

fig. 5 is a vertical cross-sectional view of a sound emitting device according to an embodiment of the present invention, taken along a second direction;

fig. 6 is a schematic structural view of a magnetic yoke according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a bezel washer according to an embodiment of the present invention;

fig. 8 is a graph showing frequency response curves of the first vibration system and the second vibration system in the sound generating apparatus according to an embodiment of the present invention;

fig. 9 is a graph showing the total harmonic distortion of the first vibration system and the second vibration system in the sound generating apparatus according to an embodiment of the present invention;

FIG. 10 is a graph of BLX and corresponding total harmonic distortion for a sound generating device having first and second voice coils with corresponding H1/H2 ratios greater than 5/4;

FIG. 11 is a BLX graph and a corresponding total harmonic distortion graph of the sound generating device when the first voice coil and the second voice coil respectively correspond to 1/3 ≤ D1/D2 ≤ 3 and D1/D2 < 1/3 or D1/D2 > 3.

Reference numerals:

the sound-generating device (100) is provided with a sound-generating device,

the housing 1, the first sub-housing 11, the second sub-housing 12,

the magnetic circuit system 2, the magnetic yoke 21, the first supporting part 211, the connecting part 212, the hollow hole 212a, the second supporting part 213, the frame part 214, the central magnetic part 22, the central magnet 221, the central washer 222, the side magnetic part 23, the side magnet 231, the side washer 232, the main body part 2321, the washer part 2322,

a first vibration system 3, a first diaphragm assembly 31, a first diaphragm 311, a first dome 312, a first voice coil 32, a first centering support 33,

second vibration system 4, second diaphragm assembly 41, second diaphragm 411, second dome 412, second voice coil 42, and second centering support 43.

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, if directional indications (such as upper, lower, left, right, front and rear \8230;) are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the attached drawings), the motion situation, etc., and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments 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, 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 present invention is described in the directions of "up", "down", "front", "back", "left", "right", etc. with reference to the direction shown in fig. 1, and is only used to explain the relative positional relationship between the components in the posture shown in fig. 1, and if the specific posture is changed, the directional indication is also changed accordingly.

The following describes in detail a sound generating device 100 according to an embodiment of the first aspect of the present invention with reference to fig. 1 to 11, wherein the sound generating device 100 may be a speaker.

As shown in fig. 1 to 5, a sound generating apparatus 100 according to an embodiment of the present invention includes: the vibration generator comprises a shell 1, a magnetic circuit system 2, a first vibration system 3 and a second vibration system 4.

Wherein, magnetic circuit 2 may be fixed to casing 1, first vibration system 3 and second vibration system 4 are located the relative both sides (for example upper and lower both sides) of magnetic circuit 2, first vibration system 3 includes first vibrating diaphragm subassembly 31 and first voice coil loudspeaker voice coil 32, second vibration system 4 includes second vibrating diaphragm subassembly 41 and second voice coil loudspeaker voice coil 42, magnetic circuit 2 may be equipped with first magnetic gap and second magnetic gap, first magnetic gap sets up and first magnetic gap is located the circumference outside in second magnetic gap with second magnetic gap interval, the one end of first voice coil loudspeaker voice coil 32 is connected with first vibrating diaphragm subassembly 31, the other end of first voice coil loudspeaker voice coil 32 inserts and locates in the first magnetic gap, the one end of second voice coil loudspeaker voice coil 42 is connected with second vibrating diaphragm subassembly 41, the other end of second voice coil loudspeaker voice coil 42 inserts and locates in the second magnetic gap.

Specifically, since the first vibration system 3 and the second vibration system 4 are disposed on two opposite sides of the magnetic circuit system 2, the first diaphragm assembly 31 and the second diaphragm assembly 41 are disposed on two opposite sides of the magnetic circuit system 2. When the sound generating device 100 works, the first voice coil 32 and the second voice coil 42 are respectively electrified, and the first voice coil 32 and the second voice coil 42 respectively drive the first vibrating diaphragm component 31 and the second vibrating diaphragm component 41 connected with the first voice coil 32 and the second voice coil 42 to vibrate and generate sound under the action of the magnetic field force, so that the purpose of double-sided sound generation is realized.

In a specific example, the first diaphragm assembly 31 includes a first diaphragm 311 and a first dome 312, an edge portion of the first diaphragm 311 is connected to the housing 1, and the first dome 312 is bonded to a central position of the first diaphragm 311. The first voice coil 32 is connected to the first diaphragm 311 or the first dome 312. The second diaphragm assembly 41 includes a second diaphragm 411 and a second dome 412, an edge portion of the second diaphragm 411 is connected to the housing 1, and the second dome 412 is connected to a center of the second diaphragm 411 in an adhesive manner. Wherein, the second voice coil 42 is connected with the second diaphragm 411 or the second dome 412.

In a specific embodiment, the first vibration system 3 further comprises a first spider 33, and the second vibration system 4 further comprises a second spider 43. One end of the first supporting core 33 is connected to the bottom of the first voice coil 32 (the end far away from the first diaphragm assembly 31), and the other end of the first supporting core 33 is connected to the housing 1. The first stiffener 33 may balance the vibration of the first voice coil 32, and may prevent the first voice coil 32 from polarizing during the vibration process. One side of the second centering branch 43 in the thickness direction is fixedly connected with the housing 1, and the other side of the second centering branch 43 in the thickness direction is connected with the second diaphragm assembly 41. The second damper 43 may serve to balance the vibration of the second diaphragm assembly 41.

As shown in fig. 4, in the vibration direction of the first vibration system 3 and the second vibration system 4, the extension height H1 of the first voice coil 32 and the extension height H2 of the second voice coil 42 may satisfy the relation: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4. Specifically, THD (Total Harmonic Distortion) of the sound generating apparatus 100 is Total Harmonic Distortion, and the main causes of the Total Harmonic Distortion of the sound generating apparatus 100 are the nonlinear KMS of the vibration system and the nonlinear BLX of the magnetic circuit system 2. Among them, the nonlinearity of BLX is mainly the unevenness of the magnetic induction density in the voice coil vibration direction. When H1/H2 is less than 5/6 or H1/H2 is greater than 5/4 (as shown in fig. 10), the height difference between the first voice coil 32 and the second voice coil 42 is large, the degree of nonlinearity of the vibration system BLX corresponding to the voice coil with the smaller height is increased, and the THD corresponding to the sound generating device 100 is deteriorated when the same KMS is matched, so that the THDs of the first vibration system 3 and the second vibration system 4 cannot be consistent, that is, the consistency of the double-sided sound generation of the sound generating device 100 is poor. When H1/H2 is more than or equal to 5/6 and less than or equal to 5/4, the non-linear degrees of the BLX of the first vibration system 3 and the BLX of the second vibration system 4 are approximately consistent, and under the condition of matching with the same KMS, the THD of the first vibration system 3 and the THD of the second vibration system 4 are approximately consistent, so that the double-sided sound production consistency of the sound production device 100 can be greatly improved, and the sound production effect of the sound production device 100 can be further improved. Alternatively, H1/H2 can be 5/6, 1, 5/4, etc.

According to the utility model discloses sound generating mechanism 100 of first aspect embodiment, the extension height H1 through setting up first voice coil loudspeaker voice coil 32 satisfies the relational expression with the extension height H2 of second voice coil loudspeaker voice coil 42: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4, so that the nonlinear degrees of the BLX of the first voice coil 32 and the BLX of the second voice coil 42 are approximately consistent, and under the condition of matching the same KMS, the THD of the first vibration system 3 and the THD of the second vibration system 4 are approximately consistent, so that the double-sided sound production consistency of the sound production device 100 can be greatly improved, and the sound production effect of the sound production device 100 can be further improved.

As shown in fig. 3-6, according to some embodiments of the present invention, the magnetic circuit system 2 may include a magnetic yoke 21, a central magnetic portion 22 and an edge magnetic portion 23, the magnetic yoke 21 includes a first supporting portion 211, a connecting portion 212 and a second supporting portion 213, a mounting hole is disposed at a center position of the first supporting portion 211, two ends of the connecting portion 212 may be respectively connected to the first supporting portion 211 and the second supporting portion 213, the second supporting portion 213 is aligned with the mounting hole and is located on a different plane from the first supporting portion 211, the central magnetic portion 22 is disposed at one side of the second supporting portion 213 near the mounting hole, the edge magnetic portion 23 is disposed at one side of the first supporting portion 211 near the second supporting portion 213, a first magnetic gap is formed between the edge magnetic portion 23 and the second supporting portion 213, and a second magnetic gap is formed between the central magnetic portion 22 and the first supporting portion 211.

Specifically, the magnetic yoke 21 may be formed substantially in a bowl shape, the first support portion 211 and the second support portion 213 are respectively located at two ends of the connecting portion 212, and the first support portion 211 and the second support portion 213 are located on different planes, so that an installation space may be defined between the connecting portion 212 and the second support portion 213, the central magnetic portion 22 may be disposed at the second support portion 213 through the installation hole and located in the installation space, and since the side magnetic portion 23 is disposed at a side of the first support portion 211 close to the second support portion 213, the side magnetic portion 23 and the central magnetic portion 22 are located substantially in the same horizontal height range, so that the overall structure of the magnetic circuit system 2 may be more compact, the overall height of the magnetic circuit system 2 may be reduced, and the sound generating device 100 may be designed to be thin.

As shown in fig. 3-5, in some embodiments of the present invention, the central magnetic portion 22 may include a central magnet 221 and a central washer 222, the central magnet 221 is disposed on the second supporting portion 213, and the central washer 222 is disposed on a side of the central magnet 221 away from the second supporting portion 213; the side magnet portion 23 may include a side magnet 231 and a side washer 232, the side magnet 231 being disposed on the first support portion 211, and the side washer 232 being disposed on a side of the side magnet away from the first support portion 211.

Specifically, the center washer 222 and the side washer 232 can both play a role of concentrating magnetism, thereby enabling magnetic induction lines to be concentrated near the first magnetic gap and the second magnetic gap, and increasing the magnetic field intensity near the first magnetic gap and the second magnetic gap. When first voice coil 32 and second voice coil 42 vibrate up and down, the magnetic field BL value that first voice coil 32 and second voice coil 42 correspond can increase, from this can promote the drive power that first voice coil 32 and second voice coil 42 act on first vibrating diaphragm subassembly 31 and second vibrating diaphragm subassembly 41, thereby can increase the sound production loudness of first vibrating diaphragm subassembly 31 and second vibrating diaphragm subassembly 41, promote sound generating device 100's vocal effect.

As shown in fig. 4, in some embodiments of the present invention, the distance between the side of the first voice coil 32 close to the first diaphragm assembly 31 and the side of the edge washer 232 close to the first diaphragm assembly 31 is D1, the distance between the side of the second voice coil 42 close to the second diaphragm assembly 41 and the side of the center washer 222 close to the second diaphragm assembly 41 is D2, and D1 and D2 satisfy the following relation: D1/D2 is more than or equal to 1/3 and less than or equal to 3. For example, when the sound generating apparatus 100 is placed vertically, the first vibration system 3 and the second vibration system 4 are respectively located at the upper and lower sides of the magnetic circuit system 2. Wherein, the top of the first voice coil 32 is connected to the first diaphragm assembly 31, and the top of the second voice coil 42 is connected to the second diaphragm assembly 41. The distance between the top of the first voice coil 32 and the upper surface of the side washer 232 is D1, the distance between the top of the second voice coil 42 and the lower surface of the center washer 222 is D2, and D1/D2 is not less than 1/3 and not more than 3.

Specifically, when D1/D2 < 1/3 or D1/D2 > 3 (as shown in fig. 11), the trend difference of the BLX non-linear degree curves of the first vibration system 3 and the second vibration system 4 is large, and in the case of matching the same KMS, the THDs of the first vibration system 3 and the second vibration system 4 cannot be consistent, that is, the consistency of the double-sided sound emission of the sound emission device 100 is poor. When D1/D2 is more than or equal to 1/3 and less than or equal to 3, the nonlinear degrees of the BLX of the first vibration system 3 and the BLX of the second vibration system 4 are approximately consistent, and under the condition of matching with the same KMS, the THD of the first vibration system 3 and the THD of the second vibration system 4 are approximately consistent, so that the double-sided sound production consistency of the sound production device 100 can be greatly improved, and the sound production effect of the sound production device 100 can be further improved. Alternatively, D1/D2 may be 1/3, 1, 2, 3, etc.

As shown in fig. 4, in some embodiments of the present invention, the distance between the side of the first diaphragm assembly 31 away from the first voice coil 32 and the side of the edge washer 232 away from the first diaphragm assembly 31 is D3, the distance between the side of the second diaphragm assembly 41 away from the second voice coil 42 and the side of the center washer 222 away from the second diaphragm assembly 41 is D4, and D3 and D4 satisfy the following relation: D3/D4 is more than or equal to 1/3 and less than or equal to 3. For example, when the sound generating device 100 is placed vertically, the first vibration system 3 and the second vibration system 4 are respectively located on the upper and lower sides of the magnetic circuit system 2. Wherein, the top of the first voice coil 32 is connected to the first diaphragm assembly 31, and the top of the second voice coil 42 is connected to the second diaphragm assembly 41. The distance between the bottom of the first voice coil 32 and the lower surface of the side washer 232 is D3, the distance between the bottom of the second voice coil 42 and the upper surface of the center washer 222 is D4, and D3/D4 is not less than 1/3 and not more than 3.

Specifically, as shown in fig. 11, when D3/D4 is less than 1/3 or D3/D4 is greater than 3, the trend difference of the BLX non-linear degree curves of the first vibration system 3 and the second vibration system 4 is large, and in the case of matching the same KMS, the THDs of the first vibration system 3 and the second vibration system 4 cannot be consistent, that is, the consistency of the double-sided sound emission of the sound emission device 100 is poor. When D3/D4 is more than or equal to 1/3 and less than or equal to 3, the non-linear degrees of the BLX of the first vibration system 3 and the BLX of the second vibration system 4 are approximately consistent, and under the condition of matching with the same KMS, the THD of the first vibration system 3 and the THD of the second vibration system 4 are approximately consistent, so that the double-sided sounding consistency of the sounding device 100 can be greatly improved, and the sounding effect of the sounding device 100 can be further improved. Alternatively, D3/D4 may be 1/3, 1, 2, 3, etc.

As shown in fig. 4, in some embodiments of the present invention, along the vibration direction of the first vibration system 3 and the second vibration system 4, the extension height L1 of the edge magnet 231 and the extension height L2 of the center magnet 221 may satisfy the relation: L1/L2 is more than or equal to 3/4 and less than or equal to 4/3. Specifically, the extension heights of the center magnet 221 and the side magnets 231 are directly related to the BL value. When L1/L2 is less than 3/4, namely the BL value corresponding to the first vibration system 3 is less than the BL value corresponding to the second vibration system 4, therefore, the loudness of sound generated by the first diaphragm assembly 31 is smaller than the loudness of sound generated by the second diaphragm assembly 41, and the sound generating device 100 cannot generate sound with two-sided sound with the same frequency response. Similarly, when L1/L2 is greater than 4/3, i.e. the BL value corresponding to the second vibration system 4 is smaller than the BL value corresponding to the first vibration system 3, the loudness of the sound generated by the second diaphragm assembly 41 is smaller than the loudness of the sound generated by the first diaphragm assembly 31, and the frequency response of the two-sided sound production of the sound production apparatus 100 cannot be consistent. When L1/L2 is greater than or equal to 3/4 and less than or equal to 4/3, the difference between the BL value corresponding to the first vibration system 3 and the BL value corresponding to the second vibration system 4 is small, and the loudness of the sound generated by the first diaphragm assembly 31 is substantially consistent with the loudness of the sound generated by the second diaphragm assembly 41, so that the consistency of the double-sided sound of the sound generating device 100 can be improved, and the sound generating effect of the sound generating device 100 can be improved. Alternatively, L1/L2 may be 3/4, 1, 4/3, etc.

As shown in fig. 4, in some embodiments of the present invention, along the vibration direction of the first vibration system 3 and the second vibration system 4, the thickness W1 of the center washer 222 and the thickness W2 of the side washer 232 may satisfy the relation: W1/W2 is more than or equal to 1/2 and less than or equal to 2. As described above, both the center washer 222 and the edge washer 232 can perform the function of concentrating the magnetic field, and therefore, the thicknesses of the center washer 222 and the edge washer 232 have a direct influence on the magnetic field strength B. When W1/W2 is less than 1/2 or W1/W2 is greater than 2, the difference between the magnetic field strengths B corresponding to the first magnetic gap and the second magnetic gap is large, the trend difference of the non-linear degree curves of the BLX of the first vibration system 3 and the second vibration system 4 is large, and in the case of matching the same KMS, the THDs of the first vibration system 3 and the second vibration system 4 cannot be consistent, that is, the consistency of the double-sided sound emission of the sound emission device 100 is poor. When W1/W2 is more than or equal to 1/2 and less than or equal to 2, the BLX nonlinearity degrees of the first vibration system 3 and the second vibration system 4 are approximately consistent, and under the condition of matching with the same KMS, the THD of the first vibration system 3 and the THD of the second vibration system 4 are approximately consistent, so that the double-sided sound production consistency of the sound production device 100 can be greatly improved, and the sound production effect of the sound production device 100 can be further improved. Alternatively, W1/W2 may be 1/2, 1, 3/2, etc.

As shown in fig. 6, in some embodiments of the present invention, at least two opposite sides of the connecting portion 212 are provided with the hollow holes 212a, and/or the side magnet 231 may be plural, the side washer 232 includes a main body portion 2321 and a plurality of washer portions 2322 that are integrally formed, the main body portion 2321 may be fixed to the housing 1, the main body portion 2321 is all provided with the plurality of washer portions 2322 and extends toward a direction close to the central magnet portion 22, and each washer portion 2322 is respectively provided with one side of the corresponding side magnet 231 that is far away from the first supporting portion 211.

Specifically, by providing the hollow holes 212a on the two opposite sides of the connection portion 212, the space inside the housing 1 can be utilized to the maximum extent, and the width of the gap between the central magnetic portion 22 and the side magnetic portions 23 can be made smaller. Moreover, the provision of the hollow-out hole 212a can also reduce the overall weight of the magnetic circuit system 2, so that a lightweight design of the sound generating device 100 can be achieved. Through setting limit washer 232 to the integrated into one piece structure that is set up by main part 2321 and a plurality of washers 2322 an organic whole, can simplify limit washer 232's overall structure, but also can simplify the assembly flow between limit washer 232 and the limit magnet 231, promote assembly efficiency.

As shown in fig. 2, fig. 6 and fig. 7, in an embodiment of the present invention, the housing 1 includes a first sub-housing 11 and a second sub-housing 12 which are separately arranged, and the first sub-housing 11 and the second sub-housing 12 are engaged by a snap or an adhesive. The first sub-housing 11 is bonded to the bezel 232 or integrally injection-molded, and the second sub-housing 12 is bonded to the yoke 21 or integrally injection-molded. The number of the side magnets 231 is four, the side washer 232 includes a main body portion 2321 and four washer portions 2322 which are integrally formed, the main body portion 2321 is formed in a square shape and is integrally injection-molded with the first sub-housing 11, the four washer portions 2322 are respectively disposed on one side of the four sides of the main body portion 2321, which is close to the central magnetic portion 22, and each washer portion 2322 is disposed at the top end of the corresponding side magnet 231. The yoke 21 includes a frame portion 214, the frame portion 214 is provided around the first support portion 211, and when the second housing 1 is fitted to the yoke 21, the frame portion 214 and the second housing 1 are formed as an integrally injection-molded component. Therefore, through the arrangement, the assembling relation among the side washer 232, the magnetic yoke 21 and the shell 1 can be simplified, and the assembling efficiency is improved.

As shown in fig. 4, in some embodiments of the present invention, the thickness of the first voice coil 32 along the radial direction is T1, the thickness of the second voice coil 42 along the radial direction is T2, and T1 and T2 satisfy the following relation: T1/T2 is more than or equal to 1/2 and less than or equal to 2. Specifically, the resistance values of the first voice coil 32 and the second voice coil 42 are the same. When the coil wire diameters of the first voice coil 32 and the second voice coil 42 are uniform, the height of the voice coil having a large thickness is reduced. When T1/T2 is less than 1/2 or T1/T2 is greater than 2, the height difference between the first voice coil and the second voice coil is large, the trend difference of the BLX nonlinear degree curves of the first vibration system 3 and the second vibration system 4 is large, and in the case of matching the same KMS, the THDs of the first vibration system 3 and the second vibration system 4 cannot be consistent, that is, the consistency of the double-sided sound emission of the sound emission device 100 is poor. Similarly, when the coil wire diameters of the first voice coil 32 and the second voice coil 42 are different greatly, on the premise that the first voice coil 32 and the second voice coil 42 have the same resistance value, when T1/T2 is less than 1/2 or T1/T2 is greater than 2, the voice coil BL with the large wire diameter is large in value and large in mass, and the voice coil BL with the small wire diameter is small in value and small in mass, so that the BL values and the mass differences of the first vibration system 3 and the second vibration system 4 are large, the sounding loudness differences of the first vibration film assembly 31 and the second vibration film assembly 41 are also large, that is, the consistency of sounding on both sides of the sounding device 100 is also poor.

When T1/T2 is more than or equal to 1/2 and less than or equal to 2, the problems in the discussion can be solved, the nonlinear degrees of the BLX of the first vibration system 3 and the second vibration system 4 are approximately consistent, and under the condition of matching with the same KMS, the THD of the first vibration system 3 and the THD of the second vibration system 4 are approximately consistent, so that the double-sided sounding consistency of the sounding device 100 can be greatly improved, and the sounding effect of the sounding device 100 can be further improved. Alternatively, T1/T2 may be 1/2, 1, 3/2, and so on.

According to the present invention, an electronic device includes the sound generating device 100 according to the present invention. The electronic device can be a mobile phone, a PAD, an intelligent wearable device, a television and the like.

According to the present invention, in the electronic device according to the second aspect, by providing the sound generating device 100 of the above embodiment, the extension height H1 of the sound generating device 100, which is provided with the first voice coil 32, and the extension height H2 of the second voice coil 42 satisfy the following relation: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4, so that the double-sided sounding consistency of the sounding device 100 can be greatly improved, and the audio quality of the electronic equipment can be improved.

It should be noted that the above is only the preferred embodiment of the present invention, and not the scope of the present invention, all of which are under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings or the direct/indirect application in other related technical fields are included in the protection scope of the present invention.

Claims (10)

1. A sound generating device, comprising:

a housing;

a magnetic circuit system fixed to the housing;

the vibration isolation device comprises a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are arranged on two opposite sides of the magnetic circuit system, the first vibration system comprises a first vibrating diaphragm component and a first voice coil, the second vibration system comprises a second vibrating diaphragm component and a second voice coil, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap, the first magnetic gap and the second magnetic gap are arranged at intervals and are positioned on the circumferential outer side of the second magnetic gap, one end of the first voice coil is connected with the first vibrating diaphragm component, the other end of the first voice coil is inserted into the first magnetic gap, one end of the second voice coil is connected with the second vibrating diaphragm component, and the other end of the second voice coil is inserted into the second magnetic gap;

wherein, along the vibration direction of the first vibration system and the second vibration system, the extension height H1 of the first voice coil and the extension height H2 of the second voice coil satisfy the relation: H1/H2 is more than or equal to 5/6 and less than or equal to 5/4.

2. The sound generating device according to claim 1, wherein the magnetic circuit system includes a magnetic yoke, a central magnetic portion and a side magnetic portion, the magnetic yoke includes a first supporting portion, a connecting portion and a second supporting portion, a mounting hole is formed in a central position of the first supporting portion, two ends of the connecting portion are respectively connected to the first supporting portion and the second supporting portion, the second supporting portion is opposite to the mounting hole and is located on a different plane from the first supporting portion, the central magnetic portion is located on a side of the second supporting portion close to the mounting hole, the side magnetic portion is located on a side of the first supporting portion close to the second supporting portion, the first magnetic gap is formed between the side magnetic portion and the second supporting portion, and the second magnetic gap is formed between the central magnetic portion and the first supporting portion.

3. The sound production device according to claim 2, wherein the central magnetic part comprises a central magnet and a central washer, the central magnet is arranged on the second support part, and the central washer is arranged on one side of the central magnet, which is far away from the second support part;

the side magnet part comprises a side magnet and a side washer, the side magnet is arranged on the first supporting part, and the side washer is arranged on one side of the side magnet, which is far away from the first supporting part.

4. The sound production device of claim 3, wherein the distance between one side of the first voice coil near the first diaphragm assembly and one side of the edge washer near the first diaphragm assembly is D1, the distance between one side of the second voice coil near the second diaphragm assembly and one side of the center washer near the second diaphragm assembly is D2, and D1 and D2 satisfy the following relation: D1/D2 is more than or equal to 1/3 and less than or equal to 3.

5. The sound production device of claim 3, wherein the distance between the side of the first voice coil, which is far away from the first diaphragm assembly, and the side of the edge washer, which is far away from the first diaphragm assembly, is D3, the distance between the side of the second voice coil, which is far away from the second diaphragm assembly, and the side of the center washer, which is far away from the second diaphragm assembly, is D4, and D3 and D4 satisfy the relationship: D3/D4 is more than or equal to 1/3 and less than or equal to 3.

6. The sound generating apparatus according to claim 3, wherein in the vibration directions of the first vibration system and the second vibration system, the extension height L1 of the side magnet and the extension height L2 of the center magnet satisfy the relationship: L1/L2 is more than or equal to 3/4 and less than or equal to 4/3.

7. The sound production device according to claim 3, wherein, along the vibration directions of the first vibration system and the second vibration system, the thickness W1 of the center washer and the thickness W2 of the edge washer satisfy the relation: W1/W2 is more than or equal to 1/2 and less than or equal to 2.

8. The sound generating device according to claim 3, wherein at least two opposite edges of said connecting portion are provided with hollowed-out holes;

and/or, the limit magnet is a plurality of, the limit china department includes main part and a plurality of china department that integrated into one piece set up, the main part is fixed in the casing, it is a plurality of the china department all locates main part and orientation are close to the direction of central magnetic part extends, every the china department locates respectively and corresponds the limit magnet is kept away from one side of first supporting part.

9. The sound generating apparatus according to any one of claims 1 to 8, wherein the first voice coil has a thickness T1 in a radial direction thereof, the second voice coil has a thickness T2 in the radial direction thereof, and the T1 and the T2 satisfy the relationship: T1/T2 is more than or equal to 1/2 and less than or equal to 2.

10. An electronic device, characterized in that it comprises a sound emitting device according to any one of claims 1-9.

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