Sound-generating device and electronic product

Abstract

The present invention discloses a sound-generating device and an electronic product, comprising a housing and a vibration system mounted on the housing. The vibration system includes a diaphragm, the edge of which is fixed to the housing. A support ring is fixed to the edge of the diaphragm, the diaphragm is connected to the housing via the support ring, and an elastic seal is provided on the outer surface of the support ring, the elastic seal being integrally formed with the support ring. The support ring smoothes the edge of the diaphragm. The elastic seal is combined with the support ring and embedded in the electronic product, providing a waterproof seal between the sound-generating device and the electronic product. This eliminates the need for applying adhesive, improving the assembly efficiency of the electronic product. When the electronic product falls, the elastic seal is configured to protect the sound-generating device from relatively small impact forces, ensuring that the acoustic performance of the sound-generating device is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of electroacoustic products, and more particularly to a sound-generating device and an electronic product. Background Art

[0002] A sound generator is a key acoustic component in electronic devices, used to convert electrical signals into sound signals and serving as an energy conversion device. Existing sound generators consist of a housing, a vibration system, and a magnetic circuit system housed within the housing. The vibration system includes a diaphragm and a voice coil, which is fixed to the lower surface of the diaphragm. When energized, the voice coil vibrates under the influence of the magnetic circuit system, causing the diaphragm to vibrate, which in turn drives the air to vibrate, producing sound.

[0003] The sound generator is installed within the entire device or acoustic module housing. This divides the housing into a front and rear chamber, which often leaks air. To prevent this from causing an acoustic short circuit and affecting audio quality, a generous amount of glue is typically applied between the sound generator and the housing or acoustic module housing. If waterproofing is also required, a larger amount of glue is required, and a specific type of waterproof glue is required to achieve both waterproofing and sound leakage prevention.

[0004] The amount of glue applied between the sound generator and the entire housing will affect the performance of the electronic product. If the amount of glue applied is relatively large, some glue will flow into the diaphragm's surround, causing the diaphragm's compliance (which largely determines the efficiency and distortion of the speaker) to change, resulting in an increase in the resonant frequency or the generation of undesirable phenomena such as swinging vibration and collision sound. If the amount of glue applied is relatively small or a softer glue is used for coating, it may cause problems such as uneven glue application due to insufficient glue in some areas or even glue breakage, resulting in fatal functional problems such as cracking of the diaphragm due to insufficient adhesion during product vibration. If the degree of glue breakage is severe, the product's waterproof function will fail, water will flow into the entire device, and the product will be scrapped.

[0005] After the sounder is assembled with the whole machine shell or the acoustic module shell by gluing, once the product needs to be reworked or repaired, the product can only be scrapped. Due to the assembly line operation and large quantity, it often causes significant losses. Summary of the Invention

[0006] An object of the present invention is to provide a sound-generating device and an electronic product having the sound-generating device.

[0007] According to a first aspect of the present invention, there is provided a sound-producing device comprising a shell and a vibration system mounted on the shell, wherein the vibration system comprises a diaphragm, an edge of which is fixed to the shell; wherein a support ring is fixed to the edge of the diaphragm, and the diaphragm is connected to the shell via the support ring; an elastic sealing body is provided on the outer surface of the support ring, and the elastic sealing body is integrally formed with the support ring.

[0008] Optionally, the elastic sealing body and the supporting ring are integrally formed by hot pressing or injection molding.

[0009] Optionally, the edge of the diaphragm is fixed to the upper surface of the support ring, and the elastic sealing body forms a protrusion with a gradually decreasing cross-section away from the outer surface of the support ring, and the protrusion formed by the elastic sealing body is arranged in a ring along the outer surface of the support ring.

[0010] Optionally, the support ring includes a main body portion and a connecting portion extending downward from the outer side of the bottom of the main body portion.

[0011] Optionally, an open groove is provided on the top outer ring of the support ring, and the connecting portion is installed in the open groove.

[0012] Optionally, the elastic sealing body covers the outer surfaces of the main body and the connecting portion at the same time.

[0013] Optionally, the elastic sealing body is made of rubber material.

[0014] Optionally, the elastic sealing body and the supporting ring are integrally formed by hot pressing, and the elastic sealing body is made of solid silicone raw material.

[0015] Optionally, the elastic sealing body and the support ring are integrally formed by hot pressing, comprising the following steps:

[0016] Mix the solid silicone raw material and the vulcanizing agent, and then mix them in a rubber mixer;

[0017] Cut the mixed solid silicone raw material into rubber materials of set size;

[0018] The support ring is placed as an insert in a hot pressing mold, and the rubber compound is further placed in the hot pressing mold. The rubber compound is hot-pressed onto the support ring to form an elastic sealing body.

[0019] Optionally, the edge portion of the diaphragm and the support ring are made of a light-transmitting material, and the support ring and the shell are connected by laser melting.

[0020] Optionally, the support ring is made of metal, plastic or carbon fiber material.

[0021] According to another aspect of the present invention, an electronic product is provided, comprising a housing and the aforementioned sound-generating device, wherein the sound-generating device is embedded in the housing, and the sound-generating device and the housing are sealed by the elastic sealing body.

[0022] Beneficial effects of the present invention: In the structure of the sound-generating device of the present invention, the edge of the diaphragm is fixed on the supporting ring, and the supporting ring supports the edge of the diaphragm, making the edge of the diaphragm smoother. Even if a line-aligning groove for the voice coil lead is provided on the upper end surface of the shell, the edge of the diaphragm will not be deformed, thereby ensuring the tightness of the bonding between the edge of the diaphragm and the bottom surface of the mounting groove, and preventing loose bonding due to the uneven edge of the diaphragm, thereby improving the waterproof performance of the sound-generating device.

[0023] In addition, an elastic sealing body is integrally formed on the support ring. Compared with an elastic sealing body integrally provided on the shell of the sound-generating device, the process of integrally forming the elastic sealing body is simpler and easier to implement because the support ring component is smaller and has a regular shape.

[0024] The elastic sealing body is integrally formed with the support ring to increase the bonding force between the elastic sealing body and the support ring, ensuring that the elastic sealing body will not fall off from the outer surface of the support ring when the sound-generating device is assembled with the electronic product, thereby ensuring the sealing of the electronic product.

[0025] When the sound-generating device is assembled with an electronic product, the elastic sealing body will be compressed by the inner wall of the entire housing of the electronic product, so that the sound-generating device is tightly embedded in the electronic product. The elastic sealing body can achieve a sealing and waterproof effect between the sound-generating device and the electronic product; when the electronic product falls, the elastic sealing body is configured to protect the sound-generating device from a relatively small impact force, ensuring that the acoustic performance of the sound-generating device is not affected.

[0026] The elastic sealing body is tightly connected to the entire machine casing, which has the effect of waterproofing and preventing air leakage. On the one hand, there is no need to apply glue between the sound-generating component and the entire machine casing, so as to avoid overflowing glue affecting the sound effect; on the other hand, since there is no need to apply glue and no need to control the amount of glue, the assembly efficiency of the sound-generating component and the entire machine casing is improved; on the other hand, if there is a problem with the sound-generating component, it can be repaired or reworked, and the repair efficiency is higher.

[0027] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0029] Figure 1 This is a schematic diagram of the cross-sectional structure of the sound-generating device of the present invention. Figure 1 .

[0030] Figure 2 This is a schematic diagram of the cross-sectional structure of the sound-generating device of the present invention. Figure 2 .

[0031] 1. Shell, 2. Support ring, 3. Elastic seal, 4. Edge, 5. Folding ring, 6. Diaphragm, 7. Connecting part DETAILED DESCRIPTION

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0033] The following is a description of at least one exemplary embodiment which is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] According to one embodiment of the present invention, Figure 1 and Figure 2 As shown, a sound-generating device includes a shell 1 and a vibration system installed on the shell 1, the vibration system includes a diaphragm 6, the edge portion 4 of the diaphragm 6 is fixed on the shell 1, the edge portion 4 of the diaphragm 6 is fixed with a support ring 2, the diaphragm 6 is connected to the shell 1 through the support ring 2, the outer surface of the support ring 2 is provided with an elastic sealing body 3, and the elastic sealing body 3 and the support ring 2 are integrally formed.

[0038] Specifically, the edge portion 4 of the diaphragm 6 is fixed on the support ring 2, and the support ring 2 supports the edge of the diaphragm 6, making the edge of the diaphragm 6 smoother. In the prior art, a line groove for the voice coil lead is provided on the upper end surface of the housing, but even so, the edge of the diaphragm 6 will not be deformed, thereby ensuring the tightness of the bonding between the edge of the diaphragm 6 and the bottom surface of the mounting groove, and preventing loose bonding due to the uneven edge of the diaphragm 6, thereby improving the waterproof performance of the generating device.

[0039] Specifically, an elastic sealing body 3 is integrally formed on the support ring 2. Compared with an elastic sealing member integrally provided on the shell 1 of the sound-generating device, the integral molding process of the elastic sealing body 3 is simpler because the support ring 2 is smaller and has a regular shape.

[0040] Specifically, when the sound-emitting device is assembled with the electronic product, the elastic sealing body 3 is tightly connected to the inner wall of the entire housing. On the one hand, there is no need to apply glue between the sound-emitting device and the entire housing, which avoids the glue overflowing to the folding ring 5 part of the diaphragm 6, causing the sound effect to deteriorate or unable to sound normally; on the other hand, traditionally, the amount of glue applied when the sound-emitting device is assembled with the entire housing needs to be strictly controlled, while in the present invention, there is no need to apply glue when the sound-emitting device is assembled with the entire housing, thereby eliminating the step of controlling the amount of glue, and improving the assembly efficiency of the sound-emitting device and the entire housing; on the other hand, electronic products often need to be reworked or repaired once problems occur. Traditional electronic products need to be sealed with glue between the sound-emitting device and the entire housing, so once problems occur, they can only be scrapped. The present invention can meet the needs of rework and repair, and at the same time is more convenient for rework or disassembly of repaired products, saving costs for enterprises.

[0041] Specifically, the elastic sealing body 3 and the support ring 2 are integrally formed by injection molding or hot pressing, and this combination method can fully improve the bonding force between the elastic sealing body 3 and the support ring 2. For example, during the assembly process of the sound-generating device and the entire housing 1, friction and compression will occur between the elastic sealing body 3 and the inner wall of the entire housing, but the elastic sealing body 3 will be firmly bonded to the outer surface of the support ring 2. After the assembly of the electronic product is completed, when the electronic product falls, the combination method of the present invention will not cause the elastic sealing body 3 to separate from the support ring 2 due to the impact force on the sound-generating device, and at the same time, the elastic sealing body 3 can reduce the impact force on the sound-generating device.

[0042] Specifically, the elastic sealing body 3 and the support ring 2 are integrally formed to form a single part, which is then installed on the shell 1. On the one hand, it is more convenient to combine with the shell 1 as a separate part; on the other hand, if the elastic sealing body 3 is installed on the shell 1 by hot pressing or injection molding, many factors need to be considered, such as the material of the shell 1. Otherwise, as time accumulates, problems such as loose combination of the elastic sealing body 3 and the support ring 2 will arise, and it is also inconvenient in actual operation. Therefore, the elastic sealing body 3 and the support ring 2 are first integrally formed into a single part and then assembled, which is more efficient and more practical.

[0043] Specifically, if Figure 1 As shown, the edge portion 4 of the diaphragm 6 is fixed to the upper surface of the support ring 2, and the elastic sealing body 3 covers the outer surface of the support ring 2. The elastic sealing body 3 forms a protrusion with a gradually decreasing cross-section as it moves away from the outer surface of the support ring 2. The protrusion formed by the elastic sealing body 3 is arranged in a ring shape along the outer surface of the support ring 2. The cross-section of the protrusion gradually decreases from the bottom to the top. This protrusion structure is more conducive to deformation after being compressed by the entire housing, thereby facilitating the assembly of the entire housing and the sound-generating device. At the same time, after the sound-generating device is assembled with the entire housing, the protrusion will be in close contact with the inner wall of the entire housing, achieving the effects of waterproofing and preventing sound leakage.

[0044] Specifically, the bottom surface of the support ring 2 is fixed to the upper surface of the housing 1. The support ring 2 plays the role of sealing connection with the housing 1. The support ring 2 includes a main body. Since the outer surface area of ​​the main body is relatively small, it cannot provide sufficient fixing area for the elastic sealing body 3. Therefore, in order to improve the stability of the elastic sealing body 3 on the support ring 2, as shown in FIG. Figure 2 As shown, a connecting portion 7 is extended downward from the outer side of the bottom of the main body, and the elastic sealing body 3 covers the outer surface of the connecting portion 7 and the outer surface of the support ring 2 at the same time, thereby improving the stability of the elastic sealing body 3 on the support ring 2.

[0045] Specifically, in order to facilitate the connection with the support ring 2 from which the connecting portion 7 is extended, an open groove is provided on the top outer ring of the shell 1, and the connecting portion 7 is installed in the open groove. The support ring 2 and the protrusion are fixed to the shell 1, and the connection area between the support ring 2 and the shell 1 is increased, and the connection between the support ring 2 and the shell 1 is more stable.

[0046] Optionally, the elastic sealing body 3 and the support ring 2 are integrally formed by hot pressing or injection molding. In this case, the material of the elastic sealing body 3 can be made of rubber raw materials. The inventors have found that solid silicone raw materials have excellent tear strength, good resilience and heat aging resistance, and can achieve sealing of electronic products. Therefore, when the material of the elastic sealing body 3 is made of solid silicone raw materials, the elastic sealing body 3 and the support ring 2 are integrally formed by hot pressing. The elastic sealing body 3 is made of solid silicone raw materials, and its performance is better. The bonding force between the elastic sealing body 3 and the support ring 2 is stronger, and its sealing performance with the entire machine housing is better.

[0047] Optionally, the elastic sealing body 3 and the supporting ring 2 are integrally formed by injection molding or hot pressing, wherein the specific steps of integrally forming by hot pressing are as follows:

[0048] S1: Mix the solid rubber raw material and the vulcanizing agent, and then mix them through a rubber mixing machine;

[0049] S2: Cutting the mixed solid rubber raw material into rubber materials of set size;

[0050] S3: Place the support ring 2 as an insert into the hot pressing mold, further place the rubber material into the hot pressing mold, and hot-press the rubber material to the outer surface of the support ring 2 to form the elastic sealing body 3.

[0051] In step S1, the solid rubber raw material is mixed with a vulcanizing agent for kneading. The vulcanizing agent is configured to vulcanize the solid rubber raw material, so that the vulcanized solid rubber raw material has more elasticity and the size and structure of the vulcanized solid rubber raw material are more stable.

[0052] Injection molding requires first injecting liquid silicone into the mold through the injection hole, and then maintaining pressure to form an elastic sealing body 3 on the outer surface of the support ring 2. Furthermore, in order to fix the elastic sealing body 3 to the outer surface of the support ring 2 and form it as a whole, the mold is docked on the outer surface of the support ring 2, and then the above operations are performed.

[0053] In one example, the elastic sealing body 3 covers the outer surface of the support ring 2, so when the sound-emitting device is installed in the electronic product, there will be a certain amount of interference between the sound-emitting device and the cavity in the electronic product. The elastic sealing body 3 will be in close contact with the inner wall of the entire housing, ensuring the sealing between the sound-emitting device and the electronic product. At the same time, the elastic sealing body 3 is firmly combined with the support ring 2, so the elastic sealing body 3 will not detach from the support ring 2 during the process of installing the sound-emitting device into the electronic product.

[0054] In one example, the edge portion 4 of the diaphragm 6 and the support ring 2 are made of a translucent material, and the support ring 2 is connected to the shell 1 by laser melting. Traditionally, the connection between the support ring 2 and the shell 1 is generally achieved by pasting, such as by applying glue or applying double-sided tape. However, in order to improve the sealing performance of the sound-generating device, the present invention adopts laser melting for connection. In the laser melting method, in order to enable the laser to pass through the diaphragm 6 and the support ring 2 smoothly, the material selected for the edge portion 4 of the support ring 2 and the diaphragm 6 is generally a translucent material. In laser welding, the edge portion 4 of the support ring 2 and the diaphragm 6 is used as a translucent material, and the shell 1 is used as an absorbing material. The laser is irradiated on the upper surface of the support ring 2 and the diaphragm 6, and the upper end surface of the shell 1 converts the laser into heat, causing the upper end surface of the shell 1 to melt. Through heat conduction from the melted part of the upper end surface of the shell 1, the bottom surface of the support ring 2 melts, thereby realizing the connection between the support ring 2 and the shell 1.

[0055] In one example, the support ring 2 can be made of metal, plastic or carbon fiber. In order to achieve a stable combination with the elastic sealing body 3, the material of the support ring 2 can be flexibly selected.

[0056] According to one embodiment of the present invention, when the sound-generating device is assembled with the complete housing of an electronic product, the elastic sealing body 3 is compressed to position the sound-generating device within the complete housing of the electronic product. The elastic sealing body 3, disposed between the sound-generating device and the complete housing of the electronic product, provides waterproofing and sealing for the electronic product. Compared to existing technologies, this eliminates the need for applying glue between the sound-generating device and the electronic product, allowing the electronic product to be disassembled and reworked if problems arise.

[0057] The inventors have discovered that when the sound-generating device is assembled with the electronic product, the elastic sealing body 3 can serve as a buffer component. For example, when the electronic product falls, the sound-generating device will be subjected to a large impact force, thereby affecting the stability of the internal structure of the sound-generating device and the acoustic performance of the sound-generating device. In order to solve this technical problem, additional buffer foam is usually provided to reduce the impact force on the sound-generating device; however, the elastic sealing body 3 provided in the present invention can fully achieve this role. After compression, the elastic sealing body 3 can play a buffering role between the sound-generating device and the electronic product, protecting the sound-generating device from a relatively small impact force when the electronic product falls, and there is no need to separately stick buffer foam, thereby reducing production costs.

[0058] According to one embodiment of the present invention, an electronic product is provided, comprising a whole housing and the above-mentioned sound-generating device, wherein the sound-generating device is embedded in the whole housing, and the sound-generating device and the whole housing are sealed by the elastic sealing body 3 .

[0059] Specifically, after the elastic sealing body 3 is compressed by the inner wall of the whole machine housing, the assembly of the sound-generating device and the whole machine housing of the electronic product is realized. The elastic sealing body 3 is configured so that when the sound-generating device is assembled into the whole machine housing by compressing the elastic sealing body 3, the elastic sealing body 3 can play a buffering and sealing role.

[0060] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A sound-generating device comprising a housing and a vibration system mounted on the housing, the vibration system comprising a diaphragm, an edge of the diaphragm being fixed to the housing; It is characterized by: A support ring is fixed to the edge of the diaphragm, and the diaphragm is connected to the housing through the support ring; An elastic sealing body is provided on the outer surface of the support ring, and the elastic sealing body is integrally formed with the support ring; The edge of the diaphragm is fixed to the upper surface of the support ring, and the elastic sealing body forms a protrusion with a gradually decreasing cross-section away from the outer surface of the support ring. The protrusion formed by the elastic sealing body is arranged in a ring along the outer surface of the support ring.

2. The sound-generating device according to claim 1, characterized in that: The elastic sealing body and the supporting ring are integrally formed by hot pressing or injection molding.

3. The sound-generating device according to claim 1, wherein: The support ring includes a main body portion and a connecting portion extending downwardly from the outer side of the bottom of the main body portion.

4. The sound-generating device according to claim 3, characterized in that: An open groove is provided on the outer ring of the top of the support ring, and the connecting portion is installed in the open groove.

5. The sound-generating device according to claim 3, characterized in that: The elastic sealing body covers the outer surfaces of the main body and the connecting portion at the same time.

6. The sound-generating device according to claim 1, characterized in that: The elastic sealing body is made of rubber raw material.

7. The sound-generating device according to claim 6, characterized in that: The elastic sealing body and the supporting ring are integrally formed by hot pressing, and the elastic sealing body is made of solid silicone raw material.

8. The sound-generating device according to claim 7, characterized in that: The elastic sealing body and the support ring are integrally formed by hot pressing, comprising the following steps: Mix the solid silicone raw material and the vulcanizing agent, and then mix them in a rubber mixer; Cut the mixed solid silicone raw material into rubber materials of set size; The support ring is placed as an insert in a hot pressing mold, and the rubber compound is further placed in the hot pressing mold. The rubber compound is hot-pressed onto the support ring to form an elastic sealing body.

9. The sound-generating device according to claim 1, characterized in that: The edge of the diaphragm and the support ring are made of a light-transmitting material, and the support ring and the shell are connected by laser melting.

10. The sound-generating device according to claim 1, wherein: The support ring is made of metal, plastic or carbon fiber material.

11. An electronic product, characterized in that: The device comprises a whole machine housing and the sound-generating device according to any one of claims 1 to 10, wherein the sound-generating device is embedded in the whole machine housing, and the sound-generating device and the whole machine housing are sealed by the elastic sealing body.

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