A loudspeaker

Abstract

This utility model provides a loudspeaker, belonging to the field of acoustics, including a frame with a diaphragm assembly. The diaphragm assembly includes a front cover silicone and a silicone diaphragm integrally formed with the front cover silicone. The key feature is that it further includes a front cover integrally injection molded with the front cover silicone, the front cover being stepped and having several through holes for integral injection molding. The integral molding of the front cover silicone and the diaphragm silicone in this invention meets deep waterproofing requirements. The circumference of the front cover is fixed and limited by positioning protrusions on the frame. When subjected to tensile or compressive forces, the frame provides support to the front cover, while the diaphragm is not stressed, thus not affecting the waterproofing effect or acoustic performance. This invention has fewer BOM materials, eliminates independent brackets and secondary bonding processes, and adopts an integral injection molding process, reducing materials and lowering material costs by 30% and the number of components by 20%. The unit cost is reduced by 18%-25%, the manufacturing process is simple, the cost advantage is significant, and the product competitiveness is improved.

Description

Technical Field

[0001] This utility model relates to a loudspeaker. Background Technology

[0002] As the environmental requirements for waterproof watches become increasingly stringent, their waterproof ratings have gradually increased from 50 meters to 100 meters and even higher to 150 meters. However, existing waterproof materials and structures are no longer sufficient to meet this high standard.

[0003] To meet the requirements for deep waterproofing and improved acoustic sensitivity, the dome area (Sd) needs to be increased. However, this change reduces the adhesive bonding area between the front cover and the frame, increasing the risk of separation. Therefore, the existing structural design must be changed to ensure the reliability of deep waterproofing.

[0004] Furthermore, the waterproof mechanism of the speaker and the entire watch relies on the tight compression between the silicone sealant on the front cover and the sidewalls of the watch. However, since the front cover and diaphragm assembly bracket are mostly made of plastic, their strength is insufficient to meet the greater compressive forces required by deep-waterproof watches. Under this compressive force, the sidewalls of the speaker diaphragm assembly are easily compressed, leading to diaphragm deformation, diaphragm and voice coil displacement, and consequently, problems such as rubbing, noise, and diaphragm breakage. Therefore, it is necessary to break away from the existing structural design and improve the overall strength of the speaker.

[0005] In conclusion, the structural design of the speaker for a deep-waterproof watch needs to simultaneously meet the requirements of deep water resistance and improve acoustic performance sensitivity, which undoubtedly poses a severe challenge to existing designs.

[0006] The following are existing solutions: The first approach involves injection molding a steel sheet into the plastic front cover, followed by injection molding of silicone on the outside. The front cover is then bonded to the diaphragm assembly (which includes a support, silicone diaphragm, and dome, all injection molded as a single piece). In this method, the front cover and the frame do not contact each other; they are only bonded through the diaphragm assembly. This bonding area is narrow, resulting in poor adhesion. Under tensile stress, the bonded area is prone to detachment, leading to waterproofing failure. Furthermore, the traditional front cover design results in poor flatness, affecting the sealing effect. Since both the front cover and the diaphragm assembly support are made of low-strength plastic, deep waterproof watches require greater compressive force on the speaker and watch case. This compression on the sidewalls of the speaker diaphragm assembly causes diaphragm deformation, leading to the aforementioned poor acoustic performance.

[0007] The second option involves molding the silicone front cover and diaphragm into a single piece. However, the bonding area between the silicone diaphragm assembly and the frame is narrow, and the properties of silicone material result in poor adhesion, making the diaphragm prone to detachment and causing waterproofing failure. Furthermore, the Z-shaped front cover, with its narrow width and weak center, is prone to deformation during assembly, leading to diaphragm deformation under stress and affecting the speaker's acoustic performance.

[0008] Additionally, the silicone diaphragm and the silicone sidewall of the front cover are connected through a glued area above the metal front cover. Because silicone has poor adhesion to other materials, the injection molding process requires numerous ejector pin holes at the glued area, which increases the probability of waterproofing failure.

[0009] The third option involves separately injection molding the front cover silicone and the diaphragm silicone. This requires two silicone injection molding processes and the addition of a material diaphragm support. The metal front cover encases the diaphragm silicone assembly (including the support, silicone diaphragm, and dome) and the frame. The diaphragm assembly is bonded to the frame with adhesive, and then further secured with adhesive through the sidewalls of the front cover and the frame. This provides a very strong bond and solves the problem of poor separation between the front cover and the frame. However, the separate injection molding of the front cover silicone and the diaphragm silicone results in two separate materials, and the addition of a diaphragm support makes the manufacturing process complex and involves many steps. This leads to high BOM and process costs, making this option uncompetitive in the market. Utility Model Content

[0010] The purpose of this invention is to overcome the shortcomings of the above-mentioned traditional technology and provide a loudspeaker.

[0011] The purpose of this utility model is achieved through the following technical measures: a speaker, including a frame, on which a diaphragm assembly is provided, the diaphragm assembly including a front cover silicone and a silicone diaphragm integrally formed with the front cover silicone, characterized in that: it further includes a front cover integrally injection molded with the front cover silicone, the front cover being stepped, and the front cover having a plurality of through holes for integral injection molding.

[0012] As an improvement, the front cover includes a first front cover body arranged vertically, a second front cover body extending inward from the first front cover body, a third front cover body extending vertically from the second front cover body, and a fourth front cover body extending inward from the third front cover body.

[0013] As a further improvement, the third front cover body is provided with a plurality of the aforementioned glue-passing holes.

[0014] As a further improvement, the front cover is a metal front cover.

[0015] As a further improvement, the basin stand includes a first basin stand body, and a second basin stand body extends outward from the first basin stand body. The first basin stand body cooperates with the first front cover body, and a plurality of positioning protrusions are provided on the side wall where the first basin stand body cooperates with the first front cover body.

[0016] As a further improvement, the inner wall of the first basin frame body is an inclined inner wall that tapers inward in the downward direction, and the inclined inner wall is located below the fold ring of the silicone diaphragm.

[0017] As a further improvement, the outer side wall of the second basin stand body is provided with a chamfer, which is located below the front cover.

[0018] As a further improvement, the lateral width of the positioning protrusion is 0.5-1.2 mm.

[0019] As a further improvement, the diameter of the glue-passing hole is ≤0.5mm.

[0020] As a further improvement, a magnetic circuit assembly is also included, the magnetic circuit assembly comprising a magnet having a central pole piece and an annular pole piece.

[0021] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are: First: This new type of waterproofing has a longer waterproofing path, resulting in a higher level of waterproofing effect; Second: The stepped cross-section of the front cover increases the strength of the front cover, improves its flatness, and enhances its bonding and sealing effect. Third: The front cover silicone (side or front) is integrally molded with the diaphragm silicone, and the silicone film is firmly bonded to the front cover, which can meet the requirements of deep waterproofing; Fourth: The front cover is fixed to the positioning protrusion of the basin frame. When subjected to pulling or compressing force, the basin frame provides support to the front cover, and the diaphragm is not subjected to force, which will not affect the waterproof effect and acoustic performance. Fifth: This new type of BOM has fewer materials, eliminates independent brackets and secondary bonding processes, and adopts an integrated injection molding process, reducing materials and material costs by 30%, and reducing the number of parts by 20%; the cost per unit is reduced by 18%-25%, the manufacturing process is simple, the cost advantage is great, and the product competitiveness is improved.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Appendix Figure 1 This is a schematic diagram of the structure of this utility model; Appendix Figure 2 This is a cross-sectional view of the structure of this utility model; Appendix Figure 3 This is a schematic diagram of the structure of the diaphragm assembly described in this utility model; Appendix Figure 4 This is an exploded view of the diaphragm assembly described in this utility model; Appendix Figure 5 This is a side view of the diaphragm assembly described in this utility model; Appendix Figure 6 It is attached Figure 5 Sectional view along line AA; Appendix Figure 7 It is attached Figure 5 Sectional view along the BB direction; Appendix Figure 8 This is a schematic diagram of the structure of the front cover described in this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Example 1: A loudspeaker includes a frame 1, on which a diaphragm assembly 2 and a magnetic circuit assembly 3 are provided. The diaphragm assembly 2 includes a front cover silicone 21 and a silicone diaphragm 22 integrally formed with the front cover silicone 21. It also includes a front cover 4 integrally injection molded with the front cover silicone 21. The integral injection molding process achieves molecular-level bonding interface, avoids the risk of interlayer peeling, and improves waterproof sealing performance under pressure without leakage. The front cover 4 is a metal front cover, which is formed by stretching stainless steel or brass sheet, resulting in better flatness. The magnetic circuit assembly 3 includes a magnet 31, on which a central pole piece 32 and annular pole pieces 33 are provided. During the waterproof test, the diaphragm dome moves downward under water pressure. The middle position of the dome is supported by the central pole piece 32, and the two ends are supported by the annular pole pieces 33.

[0029] The front cover 4 is stepped, extending the waterproof path and forming a "maze-like" sealed channel.

[0030] The front cover 4 includes a first front cover body 41 arranged vertically; when pulled during repair, the contact area with the side adhesive of the basin frame 1 increases by 35%, the tear resistance is ≥50N / cm², and the problem of separation of the front cover 4 is eliminated.

[0031] The first front cover body 41 extends inward to provide a second front cover body 42. The contact area between the second front cover body 42 and the side adhesive of the frame 1 is increased by 35%, which improves the bonding strength and prevents the front cover 4 from separating. In addition, the second front cover body 42 can replace the bracket function of the current product, play a role in bonding with silicone, and also play a role in supporting in the height direction. The vertical support force is increased by 25%, eliminating the deformation of the acoustic diaphragm under pressure.

[0032] The second front cover body 42 extends vertically to form a third front cover body 43. The third front cover body 43 has several glue-passing holes 45 for integral injection molding. The glue-passing holes 45 are formed by a stamping process, with multiple glue-passing holes 45 having a diameter ≤0.5mm. Liquid silicone passes through the glue-passing holes 45 to connect the front cover silicone 21 and the silicone diaphragm 22. Therefore, the main function of the glue-passing holes 45 is to connect the silicone diaphragm 22 and the front cover silicone 21 during silicone injection molding, and also to improve the adhesion between the silicone diaphragm 22 and the front cover 4. This achieves through-filling of the diaphragm silicone and the side wall silicone of the front cover 4 during silicone injection molding. This design not only enhances the mechanical interlocking effect between silicone and metal, but also increases the tensile strength by more than 30%, meeting the deep waterproofing requirements of 100 meters and above.

[0033] The third front cover body 43 extends inward to provide a fourth front cover body 44.

[0034] The basin frame 1 includes a first basin frame body 11, and a second basin frame body 12 extends outward from the first basin frame body 11. The first basin frame body 11 cooperates with the first front cover body 41, and a plurality of positioning protrusions are provided on the side wall of the first basin frame body 11 cooperating with the first front cover body 41. The lateral width of the positioning protrusions is 0.5-1.2mm, which are used to position the front cover 4 and the basin frame to ensure the concentricity of the product. Moreover, the positioning protrusions are fitted with the front cover 4 with a zero fit or interference fit, so that the basin frame 1 and the front cover 4 are more firmly bonded. The first front cover body 41 is limited and fixed by the positioning protrusions. The external extrusion pressure is directly transmitted to the basin frame 1 through the stepped structure. The strength of the basin frame 1 itself supports the metal front cover 4, ensuring that the diaphragm is not stressed. The waterproof sealing interface is always in a low-pressure environment, and the acoustic resonant frequency fluctuation is ≤±0.3%.

[0035] The inner wall of the first basin frame body 11 is an inclined inner wall 13 that tapers inward in the downward direction. The inclined inner wall 13 is located below the fold ring of the silicone diaphragm 22. During the waterproof test, the silicone diaphragm 22 is attached to the inclined inner wall 13 under the pressure of water, so as to avoid the silicone diaphragm 22 being stretched too long, which would cause irreversible damage to the fold ring or the membrane to break.

[0036] The second basin stand body 12 has a chamfered angle 14 on its outer side wall. The chamfered angle 14 is located below the front cover 4. The front cover 4 and the basin stand 1 are fixed by applying glue at this location.

[0037] When the speaker is assembled, the frame 1 provides support to the front cover 4 under the pressure of compression. The silicone diaphragm is not subjected to force and will not affect the waterproof effect and acoustic performance. When the speaker is disassembled and repaired, the front cover 4 will be subjected to pulling force. The first front cover body 41 and the second front cover body 42 are glued together, which increases the effective length of the edge glue joint and provides Z-direction bonding force.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A loudspeaker, comprising a frame, wherein a diaphragm assembly is disposed on the frame, the diaphragm assembly comprising a front silicone cover and a silicone diaphragm integrally formed with the front silicone cover, characterized in that: It also includes a front cover integrally injection molded with the silicone of the front cover, the front cover being stepped, and the front cover having several through holes for integral injection molding.

2. A loudspeaker according to claim 1, characterized in that: The front cover includes a first front cover body arranged vertically, a second front cover body extending inward from the first front cover body, a third front cover body extending vertically from the second front cover body, and a fourth front cover body extending inward from the third front cover body.

3. A loudspeaker according to claim 2, characterized in that: The third front cover body is provided with a plurality of adhesive passage holes.

4. A loudspeaker according to claim 1, characterized in that: The front cover is a metal front cover.

5. A loudspeaker according to claim 2, characterized in that: The basin stand includes a first basin stand body, and a second basin stand body extends outward from the first basin stand body. The first basin stand body cooperates with the first front cover body, and a plurality of positioning protrusions are provided on the side wall of the first basin stand body that cooperates with the first front cover body.

6. A loudspeaker according to claim 5, characterized in that: The inner wall of the first basin frame body is an inclined inner wall that tapers inward in the downward direction, and the inclined inner wall is located below the fold ring of the silicone diaphragm.

7. A loudspeaker according to claim 5, characterized in that: The second basin stand body has a chamfered angle on its outer side wall, and the chamfered angle is located below the front cover.

8. A loudspeaker according to claim 5, characterized in that: The lateral width of the positioning protrusion is 0.5-1.2mm.

9. A loudspeaker according to claim 1, characterized in that: The diameter of the glue-passing hole is ≤0.5mm.

10. A loudspeaker according to claim 1, characterized in that: It also includes a magnetic circuit assembly, which includes a magnet with a central pole piece and an annular pole piece.

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