CN211630380U

CN211630380U - Sound production device and electronic equipment

Info

Publication number: CN211630380U
Application number: CN202020727809.5U
Authority: CN
Inventors: 蔡晓东; 刘朝清; 韩志磊
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-11-29
Filing date: 2020-04-30
Publication date: 2020-10-02
Anticipated expiration: 2030-04-30
Also published as: CN110996223A; CN211720733U; CN111372170A; CN112468938A; CN111372169A

Abstract

The utility model discloses a sound generating mechanism and electronic equipment, wherein, sound generating mechanism includes casing and vibration system, vibration system includes the vibrating diaphragm, the vibrating diaphragm has the central part that connects gradually, turns over ring portion and edge part, the vibrating diaphragm adopts solid-state rubber materials to pass through hot pressing technology shaping and combine in the surface of casing. The utility model discloses technical scheme can improve the water-proof effects between vibrating diaphragm and the casing.

Description

Sound production device and electronic equipment

The present application claims priority from the chinese patent application filed on 29/11/2019 under the name of chinese patent office, application No. 201911197999.2, entitled "sound generator and electronic product", which is incorporated herein by reference in its entirety.

Technical Field

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

Background

With the development of science and technology, people have higher and higher requirements on the performance of electronic products, and the waterproof requirements of sound production devices in the electronic products are also higher and higher. At present, the diaphragm and the shell are mainly bonded by glue, and for waterproof electronic products, the bonding mode has the problem of high failure risk of a bonding area; and when the requirement of deep waterproof is met, the width of the gluing tape needs to be increased, the performance loss is large, and the plane space is limited.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a sound generating mechanism aims at improving the water-proof effects between vibrating diaphragm and the casing.

In order to achieve the above object, the utility model provides a sound generating mechanism, including casing and vibration system, vibration system includes the vibrating diaphragm, the vibrating diaphragm has the central part that connects gradually, turns over ring portion and edge part, the vibrating diaphragm adopts solid-state rubber materials to pass through hot pressing technology shaping and combine in the surface of casing.

Optionally, the housing has a connecting surface connected with the edge portion, the connecting surface is uneven, and the edge portion and the uneven structure on the connecting surface are mutually embedded.

Optionally, the connecting surface is convexly provided with a boss, and the edge portion wraps the boss.

Optionally, the edge portion is attached to an inner side surface of the housing.

Optionally, the folded ring portion is folded toward a side where a magnetic circuit system of the sound generating apparatus is located.

Optionally, the edge portion has a first extension portion extending in a direction away from the magnetic circuit system and a second extension portion extending in a direction close to the magnetic circuit system; the first extension part and the second extension part are respectively combined with the inner side surface of the shell in a hot-pressing mode;

the folded ring part is connected with the first extension part, and the folded ring part and the second extension part have an interval in the direction perpendicular to the vibration direction of the diaphragm.

Optionally, a hollow hole is formed in the center of the diaphragm, and a vibrating plate for closing the hollow hole is covered on the surface of the center or embedded in the center.

Optionally, the rubber material is one of silicone rubber, AEM rubber, or ACM rubber.

The utility model also provides an electronic equipment, including shell and sound generating mechanism, sound generating mechanism embedded in the shell, and with shell sealing connection.

The utility model discloses the vibrating diaphragm covers through hot pressing mode the casing need not to pass through the leakproofness that other technical means guaranteed vibrating diaphragm and casing again, just can reach fine water-proof effects, has improved the leakproofness of vibrating diaphragm and casing, has improved sound generating mechanism's waterproof performance, prevents that sound generating mechanism from appearing the phenomenon of intaking. Meanwhile, the assembly efficiency of the vibrating diaphragm and the shell is improved.

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

fig. 2 is an assembly diagram of the diaphragm and the housing in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Shell body	23	Edge part
11	Boss	231	First extension part
				20	Vibrating diaphragm	232	Second extension part
21	Center part	24	Vibrating plate
				22	Folded ring part

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 … …) are involved in the embodiment of the present invention, the directional indications 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 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 utility model provides a sound generating mechanism, this sound generating mechanism can be used to the equipment that can sound production such as earphone, cell-phone.

Referring to fig. 1 and fig. 2, the sound generating apparatus includes a housing 10 and a vibration system installed in the housing 10, the vibration system includes a diaphragm 20, the diaphragm 20 has a central portion 21, a corrugated portion 22 and an edge portion 23 connected in sequence, and the diaphragm 20 is formed by a hot pressing process using a solid rubber material and is bonded to a surface of the housing 10. That is, the diaphragm 20 itself is formed by hot pressing a solid rubber material, and can be combined with the housing 10 during the process of forming the diaphragm 20, so as to connect the diaphragm 20 and the housing 10. It should be noted that in this embodiment, the diaphragm 20 is connected to the housing 10 through the edge portion 23.

Specifically, the edge portion 23 surrounds the outer periphery of the ring-folded portion 22 and the ring-folded portion 22 surrounds the outer periphery of the central portion 21. The folded ring portion 22 can be bent relative to the central portion 21 in a direction approaching to the magnetic circuit system of the sound generating device, that is, the folded ring portion 22 is recessed downward, so as to avoid the folded ring portion 22 protruding from the top surface of the housing 10. Additionally, a dome may be provided on center portion 21 to increase its strength.

The housing 10 in this embodiment may be a plastic housing 10 or a metal housing 10.

Vibrating diaphragm 20 is when assembling with casing 10, often all need additionally to scribble sealed glue and seal, and the utility model discloses vibrating diaphragm 20 adopts solid-state rubber materials to pass through hot pressing technology shaping and combine in the surface of casing need not to guarantee vibrating diaphragm 20 and casing 10's leakproofness through other technical means again, just can reach fine water-proof effects, has improved vibrating diaphragm 20 and casing 10's leakproofness, has improved sound generating mechanism's waterproof performance, prevents that sound generating mechanism from appearing the phenomenon of intaking. And simultaneously, the assembly efficiency of the diaphragm 20 and the shell 10 is improved.

According to an embodiment of the present invention, the diaphragm 20 is formed on the inner surface of the housing 10; alternatively, the diaphragm 20 is formed on the top surface of the housing 10. Taking the diaphragm 20 molded on the inner surface of the housing 10 as an example, the edge portion 23 is attached to the inner surface of the housing 10, so as to avoid the protrusion of the diaphragm on the top surface of the housing 10, which results in a larger overall thickness. In addition, the edge portion 23 may completely cover the inner side surface of the housing 10. The complete covering here means that the upper side surface of the edge portion 23 is substantially flush with the top surface of the housing 10, and the lower side surface of the edge portion 23 is substantially flush with the bottom surface of the housing 10.

In one embodiment, the edge portion 23 has a first extension 231 and a second extension 232, the first extension 231 extends in a direction away from the magnetic circuit system, and the second extension 232 extends in a direction close to the magnetic circuit system; the first extension 231 and the second extension 232 are respectively thermally compression-bonded to the inner surface of the housing 10. The loop part 22 is connected to the first extension part 231, and the loop part 22 and the second extension part 232 have a space in a direction perpendicular to a vibration direction of the diaphragm 20. Thus, the edge portion 23 can be prevented from interfering with the vibration of the loop portion 22. In this embodiment, the first extending portion 231 may be staggered inward relative to the second extending portion 232, so as to realize the interval between the loop portion 22 and the second extending portion 232 in the direction perpendicular to the vibration direction.

By providing the first extension 231 and the second extension 232, the contact area between the edge portion 23 and the housing 10 can be made larger, and the sealing effect after hot pressing is better.

In one embodiment, the housing 10 has a connecting surface connected to the edge portion 23, the connecting surface is uneven, and the edge portion 23 and the uneven structure on the connecting surface are engaged with each other. Note that, in the embodiment in which the edge portion 23 is combined with the inner side surface of the housing 10, the connection surface refers to the inner side surface. In this embodiment, the connection surface is uneven, that is, at least, the connection surface is formed with an inward convex protrusion or an outward concave groove, and the edge portion 23 is wrapped around the protrusion or embedded into the groove to form a mutually engaged structure, so that the connection is more compact.

In one embodiment, the connecting surface of the housing 10 is convexly provided with a boss 11, and the edge portion 23 wraps the boss 11. Specifically, the edge portion 23 is formed with a groove, and the boss 11 is mounted in the groove and tightly fitted with the groove. The boss 11 extends in a circumferential direction of the housing 10 in a ring shape, and thus the groove is also in a ring shape. In this embodiment, the vibrating diaphragm 20 covers the boss 11, so that the bonding force between the vibrating diaphragm 20 and the housing 10 is improved, and the vibrating diaphragm 20 cannot fall off from the housing 10 easily.

According to an embodiment of the present invention, the diaphragm 20 is made of a solid rubber material, and the rubber material is one of silicon rubber, AEM rubber or ACM rubber. One of silicon rubber, AEM rubber or ACM rubber is chooseed for use to vibrating diaphragm 20's material, has improved vibrating diaphragm 20 and casing 10's cohesion on the one hand, has guaranteed sound generating mechanism's leakproofness, and on the other hand vibrating diaphragm 20 adopts above the material, it compares with vibrating diaphragm 20 that conventional polymer plastics were made, the utility model discloses the rubber material has lower Young's modulus, the utility model provides a vibrating diaphragm 20 has wideer elasticity region, good pliability, and vibrating diaphragm 20's vibration displacement is bigger, and the loudness is bigger, is difficult for appearing reliability problems such as rupture of membranes. When the vibrating diaphragm 20 is manufactured into a sound generating device, the vibrating diaphragm 20 can effectively inhibit polarization in the vibration process, so that the sound quality of the sound generating device is improved, and THD (total harmonic distortion) is reduced; simultaneously the utility model discloses can increase vibrating diaphragm 20 and roll over 22 width of ring portion, increase sound generating mechanism radiating area (the area that promotes vibrating diaphragm 20 vibration) to can provide great vibration stroke, to the drawing of material itself when reducing the vibration, increase fatigue resistance, guarantee sound generating mechanism's reliability.

In one embodiment, a hollow hole is formed in the central portion 21 of the diaphragm 20, and a vibrating plate 24 for closing the hollow hole is covered on the surface of the central portion 21 or embedded in the center of the central portion. Specifically, the vibrating plate 24 may be located outside the hollow hole, and the opening of the hollow hole is covered, so that the vibrating plate 24 protrudes out of the central portion 21 in the vibrating direction of the diaphragm 20. Or in other words, the vibrating plate 24 is disposed in the hollow hole and tightly fitted with the hollow hole, i.e. can contact with the hole wall of the hollow hole. The thickness of the vibration plate 24 may be the same as the depth of the hollowed hole so that the outer side surface of the vibration plate 24 is flush with the surface of the center portion 21. Of course, the thickness of the vibration plate 24 may be greater than the depth of the hollow hole so as to partially protrude outside the hollow hole. In addition, the thickness of the vibration plate 24 may be smaller than the depth of the hollow hole.

According to an embodiment of the present invention, the step of bonding the diaphragm 20 to the surface of the housing 10 by using solid rubber material through hot pressing is as follows:

step S10: mixing a solid rubber raw material and a vulcanizing agent, and then mixing by a rubber mixing mill;

step S20: cutting the mixed solid rubber raw material into sizing materials with set size;

step S30: the housing 10 is placed as an insert in a hot press mold, and further, a compound is placed in the hot press mold, and the compound is hot press molded and attached to the housing 10 to form the diaphragm 20.

Wherein in the step S10, the solid rubber raw material is mixed with a vulcanizing agent for mixing, the vulcanizing agent is configured for vulcanization of the solid rubber raw material, so that the vulcanized solid rubber raw material is more elastic and the size and structure of the vulcanized solid rubber raw material are more stable.

The utility model discloses still provide an electronic equipment, electronic equipment includes shell and sound generating mechanism, and wherein, sound generating mechanism's structure please see above-mentioned embodiment, and here is no longer repeated. In this embodiment, the sound generating device is embedded in the housing and is connected to the housing in a sealing manner, for example, the sound generating device and the housing can be abutted in a sealing manner through a sealing ring or a sealant.

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 utility model provides a sound generating mechanism, includes casing and vibration system, vibration system includes the vibrating diaphragm, the vibrating diaphragm has the central part, the ring folding portion and the edge part that connect gradually, its characterized in that, the vibrating diaphragm adopts solid-state rubber materials to pass through hot pressing technology shaping and combine in the surface of casing.

2. The sound generating apparatus as claimed in claim 1, wherein said housing has a connecting surface connected to said edge portion, said connecting surface having a rugged shape, said edge portion being interfitted with a rugged structure on said connecting surface.

3. The sound generating apparatus as claimed in claim 2, wherein said connecting surface is provided with a protruding boss, and said edge portion is wrapped around said protruding boss.

4. A sound-generating device as claimed in any one of claims 1 to 3, wherein the rim portion is adapted to engage an inside surface of the housing.

5. The sound generating apparatus as claimed in claim 4, wherein the folded ring portion is folded toward a side where a magnetic circuit system of the sound generating apparatus is located.

6. The sound generating apparatus as claimed in claim 5, wherein said edge portion has a first extension portion extending in a direction away from said magnetic circuit system and a second extension portion extending in a direction close to said magnetic circuit system; the first extension part and the second extension part are respectively combined with the inner side surface of the shell in a hot-pressing mode;

7. The sound production device as claimed in claim 1, wherein a hollow hole is formed in a center portion of the diaphragm, and a vibration plate for closing the hollow hole is covered on a surface of the center portion or embedded in the center of the center portion.

8. The sound generating apparatus of claim 7, wherein the rubber material is one of silicone rubber, AEM rubber, or ACM rubber.

9. An electronic device comprising a housing and the sound generating device of any one of claims 1-8, wherein the sound generating device is embedded in the housing and is sealingly connected to the housing.