[0030] The technical solutions of the present invention will be further described below in conjunction with the drawings and specific implementations.
[0031] In the present invention, unless expressly stipulated and defined otherwise, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, the "above" of the first feature on the second feature includes the first feature directly above and obliquely above the second feature, or it simply means that the first feature is higher in level than the second feature. The "below" of the first feature under the second feature includes the first feature directly below and diagonally below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
[0032] In addition, in the description of the present invention, unless expressly stipulated and limited otherwise, the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating that The number of technical characteristics. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features.
[0033] Such as Figure 1 to Figure 4 As shown, the passive radiator of this embodiment is arranged on the mounting hole of the sound box housing and includes a bracket 1, a diaphragm 2 and a counterweight 3. The bracket 1 is fixed on the sound box housing, and the diaphragm 2 includes a connecting portion 21 And the accommodating part 22 with a hollow cavity, the counterweight 3 is arranged in the hollow cavity of the accommodating part 22, the connecting part 21 is connected to the bracket 1, and the diaphragm 2 closes the installation hole of the sound box housing.
[0034] The technical solution of wrapping the counterweight 3 inside the diaphragm 2 enables the counterweight 3 to be firmly fixed. Compared with the conventional cold bonding connection method, the connection method is more stable and reliable, and prevents the overflow of the bonding edge. The problem of glue or separation from the seam makes the passive radiator of this embodiment have better quality.
[0035] Preferably, the diaphragm 2 is made of silicone rubber. Compared with traditional rubber materials, silicone rubber has a wider applicable temperature range, excellent aging resistance and radiation resistance, and can have high transparency.
[0036] Further, the counterweight 3 is made of glass. The counterweight 3 made of glass is matched with the diaphragm 2 made of high-transparency silicon rubber, so that the passive radiator of this embodiment has a fully transparent appearance, and the inside of the speaker can be directly observed to meet the individual needs of customers.
[0037] The embodiment of the present invention also provides a method for manufacturing the passive radiator of any of the above embodiments, including the following steps:
[0038] S1. Put the counterweight 3 into the first mold, and obtain the receiving portion 22 containing the counterweight 3 by injection molding;
[0039] S2. Put the accommodating portion 22 into the second mold, and form the connecting portion 21 by injection molding to obtain a complete diaphragm 2;
[0040] S3. The connecting part 21 and the bracket 1 are rubberized and vulcanized, so that the diaphragm 2 and the bracket 1 are connected as a whole.
[0041] The diaphragm 2 is made of rubber or other plastic materials. By injection molding the connecting portion 21 and the receiving portion 22 step by step, the connecting portion 21 and the receiving portion 22 can be made to have different colors to achieve the effect of the two-color diaphragm.
[0042] Optionally, the connecting part 21 and the accommodating part 22 can be injection molded with different materials to meet the individual needs of customers.
[0043] Preferably, the counterweight 3 is made of glass, and the diaphragm 2 is made of highly transparent silicon rubber to achieve a fully transparent appearance.
[0044] Specifically, in step S1, the counterweight 3 is tempered before being put into the first mold to increase the strength of the surface of the counterweight 3 and prevent the counterweight 3 from breaking during the subsequent manufacturing process.
[0045] Preferably, in step S1, the accommodating portion 22 is vulcanized to obtain better performance. Vulcanization refers to a semi-finished product made of rubber with a certain degree of plasticity and viscosity through appropriate processing (such as calendering, extrusion, molding, etc.) under certain external conditions through chemical factors (such as vulcanization system) or physical factors (such as (γ-ray), it is transformed into soft elastic rubber products or hard tough rubber products again, so as to obtain the process of using performance. During the vulcanization process, the external conditions cause the chemical reaction between the raw rubber and the vulcanizing agent or the raw rubber and the raw rubber in the rubber component, and the linear rubber macromolecules are cross-linked into the macromolecules with a network structure. This reaction greatly improves the various properties of the rubber, so that the rubber product can obtain the physical and mechanical properties and other properties that can meet the needs of the product. The essence of vulcanization is cross-linking, that is, the process of converting linear rubber molecules into a spatial network structure.
[0046] Preferably, in step S1, before the weight 3 is encapsulated, the surface of the weight 3 is sprayed with adhesive. The counterweight 3 and the diaphragm 2 are made of different materials, and the adhesive is sprayed on the surface of the counterweight 3, so that the injection-molded receiving part 22 can be more closely attached to the surface of the counterweight 3, so that the counterweight The block 3 is wrapped in the hollow cavity of the receiving part 22 without generating bubbles, and better quality is obtained.
[0047] Preferably, in step S2, the diaphragm 2 is vulcanized. In step S2, the connecting portion 21 is formed by injection molding and connected to the receiving portion 22 as a whole, and the entire diaphragm 2 is vulcanized, so that the diaphragm 2 as a whole has better consistency and stability, and improves product performance quality.
[0048] The bracket 1 and the diaphragm 2 are made of different materials and cannot be directly connected by hot melt. Therefore, the connection method of encapsulation and vulcanization is adopted, which avoids heating treatment. The process is simple, easy to operate, and the connection is stable. 1 and diaphragm 2 are connected as a whole, with low cost and good quality.
[0049] Preferably, in step S3, before encapsulation and vulcanization, the bonding surface of the connecting portion 21 and the bracket 1 is polished. Due to the surface bonding connection method, the bonding surface of the connecting part 21 and the bracket 1 is polished, the impurities on the bonding surface can be removed and the bonding surface has a certain degree of roughness, thereby making the bonding effect more effective. Durable and reliable.
[0050] Preferably, a vulcanized adhesive is sprayed on the bonding surface of the bracket 1 after the grinding treatment and before the encapsulation and vulcanization. The vulcanized adhesive can react with the connecting portion 21 to firmly bond the connecting portion 21 with the vulcanized adhesive on the surface of the bracket 1 so that the connecting portion 21 is fixed on the surface of the bracket 1.
[0051] Specifically, at least two layers of vulcanized adhesive need to be sprayed, and the next layer of vulcanized adhesive is sprayed after the upper layer of vulcanized adhesive is completely dried. At least two layers of vulcanized adhesive ensure the strength of the connection, and make the connection between the bracket 1 and the connecting portion 21 more stable and reliable.
[0052] As a preferred embodiment of the present invention, in the description of this specification, the description with reference to the terms "preferred", "optional", etc. means that the specific feature, structure, material or feature described in combination with the embodiment or example is included in In at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.
[0053] The above examples are only used to illustrate the detailed solutions of the present invention, and the present invention is not limited to the above detailed solutions, which does not mean that the present invention must rely on the above detailed solutions to be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc. fall within the scope of protection and disclosure of the present invention.
