CN214756895U

CN214756895U - Sound production device and mobile terminal

Info

Publication number: CN214756895U
Application number: CN202121475367.0U
Authority: CN
Inventors: 臧玮晔; 毛东升; 孟飞
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-11-16
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a sound generating device and a mobile terminal, wherein, the sound generating device comprises a shell, a first vibration component and a second vibration component, wherein the first vibration component and the second vibration component are positioned in the shell; the first vibration assembly comprises a vibrating diaphragm and a voice coil fixed on the vibrating diaphragm; the second vibration component comprises a magnetic circuit system, a magnetic gap for the voice coil to insert is formed in the magnetic circuit system, and the magnetic circuit system is fixed with the bottom shell to drive the bottom shell to vibrate synchronously. The utility model discloses a sound generating mechanism not only can be through the vibrating diaphragm sound production, can also drive mobile terminal's back lid or screen vibration sound production, has improved mobile terminal's space utilization.

Description

Sound production device and mobile terminal

Technical Field

The utility model relates to an electroacoustic conversion technology field, in particular to sound generating mechanism and mobile terminal.

Background

At present, mobile electronic terminals such as tablet computers and mobile phones mainly realize audio playing by arranging a loudspeaker inside, drive a screen or a rear cover to vibrate and sound through an exciter, and the exciter and the loudspeaker are installed in the mobile terminal as independent parts, but with additional upgrading of other functions inside the mobile electronic equipment, installation spaces of the exciter and the loudspeaker are increasingly narrow.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sound generating mechanism and mobile terminal aims at solving current mobile terminal and need install exciter and speaker respectively alone, leads to the big technical problem of occupation space.

In order to achieve the above object, the present invention provides a sound generating device, including a housing, and a first vibration component and a second vibration component located in the housing, wherein the housing includes a bottom shell, and the bottom shell is used for being fixed with a rear cover or a screen of a mobile terminal; the first vibration assembly comprises a vibrating diaphragm and a voice coil fixed on the vibrating diaphragm; the second vibration component comprises a magnetic circuit system, a magnetic gap for the voice coil to insert is formed in the magnetic circuit system, and the magnetic circuit system is fixed with the bottom shell to drive the bottom shell to vibrate synchronously.

Optionally, the second vibration assembly further includes a mass fixed to the magnetic circuit system, and a vibration gap is formed between the mass and the bottom case.

Optionally, a damping member is fixed to a side of the mass facing the bottom case, and the damping member and the bottom case form the vibration gap therebetween.

Optionally, the bottom case includes a bottom plate and a protrusion protruding from the bottom plate to a side of the magnetic circuit system, the protrusion is fixed to the magnetic circuit system, and a side of the bottom case facing away from the protrusion is used for being fixed to a rear cover or a screen of the mobile terminal.

Optionally, the magnetic circuit system includes a magnetic yoke and a magnetic steel located in the magnetic yoke, the magnetic gap is formed between the magnetic steel and the magnetic yoke, and one side of the magnetic yoke, which is away from the magnetic steel, is fixed to the bottom case.

Optionally, the housing further comprises an elastic support body fixed with the yoke.

Optionally, the housing further comprises a side wall, and the side wall extends towards the inside of the housing to form the elastic supporting body.

Optionally, the casing further includes a top cover and a middle shell connected to each other, the diaphragm is fixed to the top cover, one end of the side wall departing from the bottom shell is fixed to the middle shell, and the middle shell is located between the side wall and the top cover.

Optionally, the magnetic yoke includes a bottom wall and a side wall that are connected to each other, the magnetic steel is fixed on the bottom wall, one end of the side wall that is far away from the bottom wall extends outward to form an assembly ear, and the assembly ear is fixed with the elastic support body.

Furthermore, the utility model also provides a mobile terminal, include as above sound generating mechanism.

In the technical scheme of the utility model, a first vibration component and a second vibration component are positioned in the shell, the first vibration component comprises a vibrating diaphragm and a voice coil fixed on the vibrating diaphragm, the second vibration component comprises a magnetic circuit system, the voice coil is inserted into a magnetic gap formed by the magnetic circuit system, the voice coil is driven to vibrate by the action of a magnetic field after being electrified, and the magnetic circuit system generates a reaction force of the magnetic field after being electrified by the voice coil and also can generate vibration; the casing includes the drain pan, and magnetic circuit is fixed with the drain pan, and the drain pan is used for fixed with mobile terminal's back lid or screen for back lid or screen can vibrate the sound production under the drive of second vibration subassembly, have realized two-way sound production. The utility model discloses a sound generating mechanism not only can be through the vibrating diaphragm sound production, can also drive back lid or screen vibration sound production, has improved mobile terminal's space utilization.

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 an exploded view of a sound generating device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the sound generator of FIG. 1;

FIG. 3 is a cross-sectional view of the sound generator of FIG. 1 at another angle;

fig. 4 is an assembly view of the sound generating device and the screen according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a mobile terminal according to an embodiment of the present invention.

Examples reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Sound producing device	20	Shell body
21	Top cover	211	Via hole
				22	Middle shell	23	Side wall
231	Elastic support	24	Bottom shell
				241	Base plate	242	Raised part
30	First vibrating assembly	31	Vibrating diaphragm
				311	Ball top	312	Folded ring part
313	Fixing part	32	Voice coil
				40	Second vibrating assembly	41	Magnetic circuit system
411	Magnetic yoke	412	Bottom wall
				413	Side wall	414	Assembling ear
415	A first magnetic conductive wall	416	Second magnetic conductive wall
				417	Magnetic steel	418	Washer
42	Mass block	421	Annular portion
				422	Bump	423	Through hole
43	Damping member	50	Screen
				60	Back cover	70	Buffer piece
232	Avoiding hole	100	Mobile terminal

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 and rear … …) in the embodiment 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.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly 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.

As shown in fig. 1 to fig. 3, the present invention provides a sound generating device 10, which includes a housing 20, and a first vibration component 30 and a second vibration component 40 located in the housing 20, wherein the housing 20 includes a bottom shell 24, and the bottom shell 24 is used to be fixed to a rear cover 60 or a screen 50 of a mobile terminal 100; the first vibration assembly 30 includes a diaphragm 31 and a voice coil 32 fixed to the diaphragm 31; the second vibration assembly 40 includes a magnetic circuit system 41, the magnetic circuit system 41 forms a magnetic gap for inserting the voice coil 32, and the magnetic circuit system 41 is fixed with the bottom case 24 to drive the bottom case to vibrate synchronously.

Referring to fig. 4, the bottom case 24 may be fixed to a rear cover 60 or a screen 50 of a mobile terminal such as a mobile phone or a tablet computer to form a mobile terminal 100, the diaphragm 31 and the screen 50 may be disposed opposite to each other, and after the voice coil 32 is powered on, an electromotive force is generated in a magnetic gap of the magnetic circuit 41 to drive the diaphragm 31 to vibrate along a first direction. The voice coil 32 is electrified to generate a magnetic field to generate a reaction force on the magnetic circuit system 41, the magnetic circuit system 41 is driven to vibrate along the second direction, the first vibration assembly 30 and the second vibration assembly 40 can be arranged in a back-to-back manner, the first direction and the second direction are just opposite, namely, the vibration diaphragm 31 and the magnetic circuit system 41 can vibrate along the opposite directions in the thickness direction of the sound generating device 10, the magnetic circuit system is fixed with the bottom shell, and the bottom shell can synchronously vibrate along with the magnetic circuit system, so that the sound generating device 10 can directly drive the rear cover 60 or the screen 50 of the mobile terminal to vibrate and generate sound, and the two-way sound generation and linear vibration are realized by using one set of magnetic circuit system 41 and two sets of vibration systems, the structure is compact, the limited space in the mobile terminal 100 is fully utilized, and the cost is saved; and the direct-drive screen 50 is used for sound production to amplify, so that the sensitivity and the acoustic performance are improved.

Further, the second vibration assembly 40 further includes a mass 42 fixed to the magnetic circuit system 41, and a vibration gap is formed between the mass 42 and the bottom case 24, that is, the mass 42 and the bottom case 24 are spaced by a certain distance to form a vibration gap for the mass to vibrate; the mass 42 increases the mass of the second vibration assembly 40, increases the amplitude of vibration, increases the vibration sensation of the sound generating device 10,

the damping member 43 may be fixed on a side of the mass 42 facing the bottom plate 241, the damping member 43 and the bottom case 24 form the above-mentioned vibration gap, and the damping member 43 may be made of foam, sponge, rubber, silica gel, plastic, and other materials with elasticity, which have a damping effect and can buffer the impact of the second vibration assembly 40 on the screen 50.

The bottom case 24 includes a bottom plate 241 and a protrusion 242 protruding from the bottom plate 241 to a side of the magnetic circuit 41, the magnetic circuit 41 is fixed to the protrusion 242, a side of the bottom plate 241 facing away from the protrusion 242 is used for fixing to the rear cover 60 or the shield 50 of the mobile terminal 100, the bottom plate may be directly adhered to the rear cover 60 or the screen 50, and the protrusion 242 is formed to form a vibration gap between the mass 42 and the rear cover 60 or the screen 50, thereby providing a vibration space for the mass 42. The damper 43 is annularly disposed around the circumference of the protrusion 242, so that the damper 43 can cover the bottom of the mass 42, further enhancing the damping effect, and buffering the impact of the second vibration assembly 40 on the screen 50.

In an embodiment, the magnetic circuit system 41 includes a magnetic yoke 411 and a magnetic steel 417 located in the magnetic yoke 411, a magnetic gap is formed between the magnetic steel 417 and the magnetic yoke 411, the mass block 42 is fixed to the magnetic yoke 411, and a side of the magnetic yoke 411 facing away from the magnetic steel 417 is fixed to the protrusion 242. The magnetic yoke 411 is magnetically conductive, the magnetic yoke 411 includes a bottom wall 412 and a side wall 413 connected to each other, the side wall 413 extends from the bottom wall 412 to a direction close to the diaphragm 31, the magnetic steel 417 is fixed on the bottom wall 412, a certain distance is formed between the side wall 413 and the magnetic steel 417, that is, a magnetic gap is formed, the voice coil 32 is suspended in the magnetic gap, the mass block 42 is provided with a through hole 423, the side wall 413 of the magnetic yoke 411 passes through the through hole 423, and an inner wall surface of the mass block 42 abuts against the side wall 413 of the magnetic yoke 411. Wherein, magnet steel 417 may be in a rectangular parallelepiped shape, the appearance of sound generating device 10 is also in a rectangular parallelepiped shape, and the long side of the whole sound generating device 10 may extend along the length direction or the width direction of screen 50 to reduce the thickness of the whole mobile terminal 100. In other embodiments, the magnetic gap may be formed by disposing the spaced main magnetic steel 417 and the secondary magnetic steel 417. The magnetic steel 417 may also be set to be circular, and the whole sound generating device 10 is a cylinder structure.

In another embodiment, the magnetic circuit system 41 further includes a washer 418 fixed on the magnetic steel 417, the washer 418 may be adhered to a surface of the magnetic steel 417 facing away from the bottom wall 412 of the yoke 411, and the magnetic gap is formed between the washer 418 and the side wall 413 of the yoke 411, so as to modify the magnetic steel 417 line, provide a required uniform magnetic field for the movement of the voice coil 32, increase the magnetic flux of the voice coil 32, and improve the acoustic performance of the sound generating apparatus 10.

In a preferred embodiment, the housing 20 further includes an elastic support 231, the elastic support 231 is fixed to the yoke 411, and the elastic support 231 can provide a restoring force to the second vibration assembly 40 to increase vibration.

Casing 20 still includes side wall 23, and side wall 23 extends to casing 20 inside and forms elastic support body 231, and side wall 23 has the effect of protection sound generating mechanism 10 inner structure, and the interval has certain clearance between side wall 23 and the bottom plate 241 of drain pan 24, and side wall 23 and elastic support body 231 of this embodiment adopt thin steel sheet integrated into one piece, form a holistic shell fragment, follow the simultaneous vibration of second vibration subassembly 40, simple structure and be convenient for the installation. In other embodiments, an elastic support 231 may be separately provided as an elastic sheet to provide an elastic restoring force. Further, a hollow area is formed between the elastic supporting body 231 and the side wall 23, and the elastic supporting body 231 is bent to form a bending area, so that the elastic restoring force is increased, and the vibration sense is enhanced.

Specifically, the end of the side wall 413 of the yoke 411 away from the bottom wall 412 extends outward to form a fitting lug 414, and the fitting lug 414 is fixed to the elastic support 231. Specifically, the bottom of the assembling lug 414 may be bonded or welded to the elastic support 231 to fix the elastic support 231 to the magnetic circuit system 41, and the installation is simple, the side wall 413 of the magnetic yoke 411 may include two first magnetic guiding walls 415 disposed opposite to each other and two second magnetic guiding walls 416 disposed opposite to each other, the first magnetic guiding walls 415 are disposed on the long side of the bottom wall 412 of the magnetic yoke 411, the second magnetic guiding walls 416 are disposed on the short side of the bottom wall 412, the assembling lug 414 is formed at an end of the first support arm away from the bottom wall 412, the first magnetic guiding walls 415 and the second magnetic guiding walls 416 are disposed at intervals, the short side of the elastic support 231 forms an avoiding hole 232 for inserting an end of the second magnetic guiding wall 416, the assembling lug 414 extends toward the side wall 23 of the housing 20, and the bottom of the assembling lug 414 is bonded or welded to the elastic support 231. Of course, in other embodiments, the mounting lug 414 may also be formed at the end of the second magnetically conductive wall 416 distal from the bottom wall 412; the entire side wall 413 of the magnetic yoke 411 may also be an integral annular side wall 413, and the shape of the magnetic yoke 411 may be set according to specific needs, which is not described herein again.

Furthermore, the elastic supporting body 231 is clamped between the assembling lug 414 and the mass block 42, the assembling lug 414 of the magnetic yoke 411, the elastic supporting body 231 and the mass block 42 can be sequentially bonded or welded, and the damping member 43 is fixed on one surface of the mass block 42, which is far away from the elastic supporting body 231, so that the overall structure of the sound generating device 10 is compact, and the occupied space of the sound generating screen 50 device is reduced. The mass 42 may specifically include an annular portion 421 and a protrusion 422 extending from the annular portion 421 to the elastic support 231, the elastic support 231 is sandwiched between the protrusion 422 and the mounting lug 414, and the damping member 43 is fixed on a side of the annular portion 421 away from the protrusion 422. During assembly, the magnetic steel 417 may be fixed on the bottom wall 412 of the magnetic yoke 411, the washer 418 may be fixed on the magnetic steel 417, then the side wall 413 of the magnetic yoke 411 passes through the through hole 423 of the mass block 42, then the ear 414, the elastic support 231 and the mass block 42 are sequentially fixed, the damping member 43 is fixed on the mass block 42, and finally the protrusion 242 of the bottom shell 24 is fixed on the bottom wall 412 of the magnetic yoke 411.

More detailedly, casing 20 still includes top cap 21 and mesochite 22 of interconnect, mesochite 22 is fixed with the one end that side wall 23 deviates from drain pan 24, mesochite 22 is located between side wall 23 and top cap 21, vibrating diaphragm 31 includes ball top 311, dog-leg portion 312 and fixed part 313 that connect gradually, voice coil 32 is fixed on ball top 311, fixed part 313 is fixed with the edge of top cap 21, can specifically press from both sides fixed part 313 of vibrating diaphragm 31 between top cap 21 and mesochite 22, set up the via hole 211 relative with ball top 311 on top cap 21, ball top 311 and china 418 interval set up, for ball top 311 provides the vibration space. Above-mentioned compact structure, and contain first vibration subassembly 30 and second vibration subassembly 40 in the sound generating mechanism 10 simultaneously, top cap 21 and drain pan 24 set up back on the back mutually, and the bottom plate 241 of drain pan 24 is fixed with screen 50, not only can make mobile terminal 100 produce the vibration, but also can realize two-way sound production, has improved mobile terminal 100's space utilization.

Furthermore, the utility model provides a mobile terminal 100, as shown in fig. 4, including back lid 60, screen 50 and as above sound generating mechanism 10, back lid 60 interconnects with screen 50 and forms a cavity, and sound generating mechanism 10 is located the cavity, and sound generating mechanism 10's vibrating diaphragm 31 is fixed with screen 50 towards back lid 60, sound generating mechanism 10's drain pan 24 to be used for driving screen 50 vibration sound production. The front cover of the sound generating device 10 is directly fixed to the rear cover 60, the sound outlet corresponding to the vibrating diaphragm 31 is formed in the rear cover 60, one side of the bottom plate 241 of the bottom shell 24, which is away from the bulge 242, is fixed to the screen 50, so that the internal space of the mobile terminal 100 is saved, vibration and bidirectional sound generation of the mobile terminal 100 are realized, the screen 50 is driven to generate sound directly, and the acoustic performance is improved. Since the mobile terminal 100 adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not described in detail herein.

In an embodiment, a buffer member 70 may be disposed between the rear cover 60 and the screen 50, and the buffer member 70 may specifically be made of a material with elasticity, such as foam sponge, rubber, silica gel, and plastic, to provide a buffer space for the vibration of the screen 50, so as to avoid interference between the rear cover 60 and the screen 50.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. The sound production device is characterized by comprising a shell, a first vibration assembly and a second vibration assembly, wherein the first vibration assembly and the second vibration assembly are positioned in the shell; the first vibration assembly comprises a vibrating diaphragm and a voice coil fixed on the vibrating diaphragm; the second vibration component comprises a magnetic circuit system, a magnetic gap for the voice coil to insert is formed in the magnetic circuit system, and the magnetic circuit system is fixed with the bottom shell to drive the bottom shell to vibrate synchronously.

2. The sound generating apparatus of claim 1, wherein said second vibration assembly further comprises a mass fixed to said magnetic circuit system, said mass forming a vibration gap with said bottom case.

3. The sound generating apparatus as claimed in claim 2, wherein a damping member is fixed to a side of the mass facing the bottom case, the damping member and the bottom case forming the vibration gap therebetween.

4. The sound generating apparatus as claimed in claim 1, wherein the bottom case includes a bottom plate and a protrusion protruding from the bottom plate to a side of the magnetic circuit system, the protrusion being fixed to the magnetic circuit system, and a side of the bottom case facing away from the protrusion being used for fixing to a rear cover or a screen of the mobile terminal.

5. The sound production device according to any one of claims 1 to 4, wherein the magnetic circuit system includes a magnetic yoke and a magnetic steel located in the magnetic yoke, the magnetic gap is formed between the magnetic steel and the magnetic yoke, and a side of the magnetic yoke facing away from the magnetic steel is fixed to the bottom case.

6. The sound generating apparatus of claim 5 wherein said housing further comprises an elastic support, said elastic support being secured to said yoke.

7. The sound generating apparatus of claim 6 wherein said housing further comprises a side gusset extending inwardly of said housing to form said resilient support.

8. The sound generating apparatus of claim 7, wherein the housing further comprises a top cover and a middle shell connected to each other, the diaphragm is fixed to the top cover, an end of the side wall facing away from the bottom shell is fixed to the middle shell, and the middle shell is located between the side wall and the top cover.

9. The sound generating apparatus as claimed in claim 6, wherein said yoke comprises a bottom wall and a side wall connected to each other, said magnetic steel is fixed to said bottom wall, and an end of said side wall away from said bottom wall extends outwardly to form a mounting lug, said mounting lug is fixed to said elastic support.

10. A mobile terminal characterized by comprising a sound emitting device according to any one of claims 1 to 9.