Module shell and loudspeaker module

Abstract

The utility model discloses a module shell and loudspeaker module, module shell, including steel sheet, plastic shell and sealant, steel sheet includes the body with extension, is equipped with the inlay needle hole on the extension, and the inlay needle hole is close to the side of body is straight edge, and the straight edge is connected with the L -shaped glue -claw of grabbing, and the end of glue -claw is away from inlay needle hole, plastic shell and steel sheet are formed as integral type structure through insert injection molding, and plastic shell has the glue injection hole corresponding with inlay needle hole, and sealant covers the junction of body and plastic shell and fills glue injection hole. Module shell is not easy to crack in the inlay needle hole vicinity area sealant, has better sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to module housing and speaker module. Background Technology

[0002] As electronic products continue to be updated and replaced, the performance requirements of electronic products are getting higher and higher. Speaker modules have evolved from being waterproof for daily use to requiring IP68 or even higher levels of waterproofing. Furthermore, as the usage scenarios become more and more stringent, the drop tests on speaker modules are becoming more and more rigorous.

[0003] To reduce stacking height, traditional speaker modules commonly employ a front cavity steel sheet structure using injection molding. Circular insert holes are set in the steel sheet, and the inserts suspend and position the steel sheet during injection molding. After the insert is molded, adhesive is applied to seal the interface between the steel sheet and the plastic. To further improve the bonding strength between the steel sheet and the plastic, the industry standard practice is to add a bending section to the edge of the steel sheet to form an adhesive gripping structure. However, the circular insert holes must remain perfectly circular for the inserts to be inserted, and no adhesive gripping structure can be set in the adjacent area. This means that this area still relies entirely on adhesive for sealing. During drop tests, stress concentrates at the edge of the insert holes, causing the adhesive to crack and form moisture penetration channels, ultimately leading to the failure of the entire unit's waterproofing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a module housing with a sealant in the area near the pinhole that is not easy to crack, and the speaker module having the module housing.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a module shell, comprising: The steel sheet includes a body with an extension, the extension having a pin hole, the side of the pin hole near the body being a straight edge, the straight edge being connected to an L-shaped gripper claw, the end of the gripper claw being away from the pin hole. The plastic shell and the steel sheet are injection molded into an integral structure through inserts. The plastic shell has injection holes corresponding to the pin holes. The sealant covers the junction between the body and the plastic shell and fills the injection hole.

[0006] Furthermore, the sealant includes a first part, a second part, and a third part connected in sequence. The first part is arranged in a circle to cover the junction of the body and the plastic shell. The second part covers the extension. The third part fills the injection hole.

[0007] Furthermore, the edge of the body is provided with a pressing edge, the first part covers the pressing edge, and the extension connects to the edge of the pressing edge.

[0008] Furthermore, the gripper and the steel sheet are an integral structure, and the gripper is a bent structure.

[0009] Furthermore, when the gripper is flattened, it is housed in the pin hole.

[0010] Furthermore, the diameter of the injection hole is smaller than the diameter of the pin hole, and a portion of the plastic shell is located between the injection hole and the gripper.

[0011] Furthermore, the pinhole is semi-circular, semi-elliptical, or polygonal.

[0012] Furthermore, the number of the extensions is multiple, and the extensions are provided on at least one set of opposite sides of the body.

[0013] Furthermore, the two extensions located on a set of opposite sides of the body are symmetrically arranged.

[0014] To solve the above-mentioned technical problems, the present invention also adopts the following technical solution: a speaker module, including the above-mentioned module housing.

[0015] The beneficial effects of this utility model are as follows: by setting straight-edge pin holes on the extension of the steel sheet, and extending L-shaped gripping claws integrally from the straight edge, the area adjacent to the circular pin holes, where gripping structures could not originally be arranged, can also form mechanical anchor points that interlock with the plastic. After the insert is injection molded, the plastic wraps around the gripping claws and forms injection holes. When the sealant cures, it simultaneously seals and bonds the steel sheet body and the plastic shell. When the impact of a drop is transmitted to the edge of the pin hole, the stress is dispersed into the plastic body by the L-shaped gripping claws, avoiding stress concentration that causes the sealant to crack. Thus, without increasing the stacking height or changing the function of the pin holes, the water vapor penetration path is blocked, ensuring the sealing reliability of the module shell under IP68 waterproof requirements and harsh drop test conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the module housing in Embodiment 1; Figure 2 This is a cross-sectional view of the module housing in Embodiment 1; Figure 3 This is an exploded view of the module casing of Embodiment 1; Figure 4 This is a schematic diagram of the steel sheet structure in the module housing of Example 1; Figure 5 This is a schematic diagram of the sealant structure in the module housing of Example 1; Figure 6 Simulated stress diagram of the sealant in the existing module housing; Figure 7This is a simulated stress diagram of the sealant in the module housing of Example 1.

[0017] Label Explanation: 1. Steel sheet; 11. Body; 111. Edge clamping; 12. Extension; 13. Pin hole; 14. Grip claw; 141. Vertical arm; 142. Horizontal arm; 2. Plastic outer shell; 21. Injection hole; 3. Sealant; 31. Part 1; 32. Part 2; 33. Part 3. Detailed Implementation

[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] Please refer to Figures 1 to 5 Module housing, including: Steel sheet 1, steel sheet 1 includes a body 11 with an extension 12, the extension 12 is provided with a pin hole 13, the side of the pin hole 13 near the body 11 is a straight edge, the straight edge is connected to an L-shaped gripper claw 14, the end of the gripper claw 14 is away from the pin hole 13. The plastic shell 2 and the steel sheet 1 are integrally molded by insert injection molding. The plastic shell 2 has an injection hole 21 corresponding to the pin hole 13. Sealant 3 covers the junction between the main body 11 and the plastic shell 2 and fills the injection hole 21.

[0020] As can be seen from the above description, the beneficial effects of this utility model are as follows: by setting a straight-edge pin hole 13 on the extension 12 of the steel sheet 1, and extending an L-shaped gripper 14 integrally from the straight edge, the area adjacent to the circular pin hole 13, which originally could not be arranged with a gripper structure, can also form a mechanical anchor point that interlocks with the plastic; after the insert is injection molded, the plastic wraps the gripper 14 and forms an injection hole 21. When the sealant 3 is cured, it simultaneously seals and bonds the steel sheet 1 body 11 and the plastic shell 2. When the drop impact is transmitted to the edge of the pin hole 13, the stress is dispersed into the plastic body by the L-shaped gripper 14, avoiding the cracking of the sealant 3 caused by stress concentration. Thus, without increasing the stacking height or changing the function of the pin hole 13, the water vapor penetration path is blocked, ensuring the sealing reliability of the module shell under IP68 waterproof requirements and harsh drop test conditions.

[0021] Furthermore, the sealant 3 includes a first part 31, a second part 32, and a third part 33 connected in sequence. The first part 31 is arranged in a circle to cover the junction of the body 11 and the plastic shell 2. The second part 32 covers the extension 12. The third part 33 fills the injection hole 21.

[0022] As described above, the sealant 3 is divided into a first part 31, a second part 32, and a third part 33 connected in sequence. The first part 31 forms a continuous closed loop along the interface between the body 11 and the plastic shell 2. The second part 32 covers the extension 12, and the third part 33 fills the injection hole 21, so that the segments of the sealant are mutually attracted. When dropped, the local stress can be gradually dispersed, reducing the risk of interface peeling. At the same time, it avoids shrinkage cracks caused by sudden changes in the thickness of the sealant layer, and further improves the stability of the waterproof seal.

[0023] Furthermore, the edge of the body 11 is provided with a pressing edge 111, the first part 31 covers the pressing edge 111, and the extension 12 connects to the edge of the pressing edge 111.

[0024] As can be seen from the above description, the presence of the pressure edge 111 can not only improve the rigidity of the steel sheet 1 itself, but also accommodate part of the sealant 3 to increase the bonding area between the sealant 3 and the steel sheet 1, thereby improving the waterproof performance to a greater extent.

[0025] Furthermore, the gripper 14 and the steel sheet 1 are an integral structure, and the gripper 14 is a bent structure formed by bending.

[0026] As described above, the gripper 14 is integrally formed with the steel sheet 1 and bent into an L-shape, eliminating the need for additional parts and ensuring the strength of the steel sheet 1. The bent structure is fully encased in plastic during injection molding, which can disperse the impact energy of the drop to the inside of the plastic, reduce the direct stress on the sealant 3, and reduce the probability of cracking.

[0027] Furthermore, when the gripper 14 is flattened, it is housed in the pin hole 13.

[0028] As can be seen from the above description, the gripper 14 can be formed by bending the area that would have been removed to set the pin hole 13, which effectively reduces the waste of steel sheet 1 raw materials.

[0029] Furthermore, the diameter of the injection hole 21 is smaller than the diameter of the pin hole 13, and a portion of the plastic shell 2 is located between the injection hole 21 and the gripper 14.

[0030] Furthermore, the pinhole 13 is semi-circular, semi-elliptical, or polygonal.

[0031] As can be seen from the above description, the semi-circular, semi-elliptical, or polygonal pin holes 13 all have the straight edges and can all form the gripper claw 14.

[0032] Furthermore, there are multiple extensions 12, and at least one pair of opposite sides of the body 11 are provided with the extensions 12.

[0033] As described above, the main body 11 has at least one set of multiple extensions 12 on opposite sides, and each extension 12 is equipped with a gripper 14, so that the steel sheet 1 and the plastic shell 2 form a mechanical interlock at multiple edge positions at the same time, dispersing the drop stress to more anchor points, avoiding single-point failure, and improving the overall structural strength and the life of the sealant 3.

[0034] Furthermore, the two extensions 12 located on a set of opposite sides of the body 11 are symmetrically arranged.

[0035] As described above, a set of symmetrically arranged extensions 12 on opposite sides allows the anchor points on both sides to bear the load synchronously during a drop impact, resulting in a balanced stress distribution. This reduces the warping deformation of the module shell, prevents local tearing of the sealant 3 due to torsional deformation, and maintains long-term waterproof performance.

[0036] To solve the above-mentioned technical problems, the present invention also adopts the following technical solution: a speaker module, including the above-mentioned module housing.

[0037] As described above, the speaker module uses any of the aforementioned module housings. While maintaining a thin stacking height, it utilizes the gripper claw 14 and sealant 3 in a collaborative structure to improve drop resistance and waterproof performance, meeting IP68 sealing requirements and extending the service life of the end product.

[0038] Embodiment 1 of this utility model is as follows: Please refer to Figures 1 to 5 A speaker module includes a speaker unit and a module housing. The speaker unit is disposed inside the module housing. The module housing includes a steel sheet 1, a plastic housing 2, and sealant 3. The steel sheet 1 includes a body 11 with an extension 12. The extension 12 has a pin hole 13. The side of the pin hole 13 near the body 11 is a straight edge, and the straight edge is connected to an L-shaped adhesive gripper 14. The end of the adhesive gripper 14 is away from the pin hole 13. The plastic housing 2 and the steel sheet 1 are integrally formed by insert injection molding. The plastic housing 2 has an injection hole 21 corresponding to the pin hole 13. The sealant 3 covers the junction of the body 11 and the plastic housing 2 and fills the injection hole 21.

[0039] Specifically, the gripper 14 includes a vertically connected vertical arm 141 and a horizontal arm 142. The end of the vertical arm 141 away from the horizontal arm 142 is connected to the straight edge. The end of the gripper 14 away from the pin hole 13 means that the horizontal arm 142 is located on the side of the vertical arm 141 closer to the center of the body 11.

[0040] The sealant 3 includes a first portion 31, a second portion 32, and a third portion 33 connected in sequence. The first portion 31 is arranged in a circle to cover the junction of the body 11 and the plastic shell 2. The second portion 32 covers the extension 12. The third portion 33 fills the injection hole 21. In one or more embodiments, the edge of the body 11 is provided with a pressing edge 111, the first portion 31 covers the pressing edge 111, and the extension 12 connects to the edge of the pressing edge 111.

[0041] The gripper 14 and the steel sheet 1 are integrally formed. The gripper 14 is a bent structure; in other words, the vertical arm 141 and the horizontal arm 142 are both formed by bending a portion of the body 11. Preferably, when the gripper 14 is flattened, it is housed in the pin hole 13, meaning the gripper 14 can be made from the leftover material removed during the manufacturing of the pin hole 13.

[0042] The diameter of the injection hole 21 is smaller than the diameter of the pin hole 13. A portion of the plastic shell 2 is located between the injection hole 21 and the gripper 14, allowing the gripper 14 to be more fully covered, thereby improving the stability of the connection between the steel sheet 1 and the plastic shell 2.

[0043] The pin hole 13 is semi-circular, semi-elliptical, or polygonal. The polygonal shape includes, but is not limited to, triangles, pentagons, and hexagons. In this embodiment, the pin hole 13 is rectangular, and the glue injection hole 21 is rectangular.

[0044] The main body 11 is rectangular, and there are multiple extensions 12. At least one pair of opposite sides of the main body 11 are provided with the extensions 12. Optionally, two extensions 12 located on a pair of opposite sides of the main body 11 are symmetrically arranged.

[0045] Figure 6 The simulation stress diagram of the sealant in the existing module housing is shown. Figure 7 This diagram shows a simulated stress diagram of the sealant in the module housing of this embodiment; from Figure 6 As can be seen, the stress value of the sealant in the area within the circular injection hole is 25.23 MPa. Figure 7 As can be seen, the maximum stress value of the sealant at the injection hole is 13.764 MPa, which is 45% lower than that of the prior art. This shows that the module shell of this embodiment effectively improves the stress concentration phenomenon in some areas of the sealant and reduces the risk of sealant cracking at the pin hole.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A module housing, characterized in that, include The steel sheet includes a body with an extension, the extension having a pin hole, the side of the pin hole near the body being a straight edge, the straight edge being connected to an L-shaped gripper claw, the end of the gripper claw being away from the pin hole. The plastic shell and the steel sheet are injection molded into an integral structure through inserts. The plastic shell has injection holes corresponding to the pin holes. The sealant covers the junction between the body and the plastic shell and fills the injection hole.

2. The module housing according to claim 1, characterized in that, The sealant includes a first part, a second part, and a third part connected in sequence. The first part is arranged in a circle to cover the junction of the body and the plastic shell. The second part covers the extension. The third part fills the injection hole.

3. The module housing according to claim 2, characterized in that, The edge of the body is provided with a pressing edge, the first part covers the pressing edge, and the extension connects to the edge of the pressing edge.

4. The module housing according to claim 1, characterized in that, The gripper and the steel sheet are an integral structure, and the gripper is a bent structure.

5. The module housing according to claim 4, characterized in that, When the gripper is flattened, it is housed in the pin hole.

6. The module housing according to claim 1, characterized in that, The diameter of the injection hole is smaller than the diameter of the pin hole, and a portion of the plastic shell is located between the injection hole and the gripper.

7. The module housing according to claim 1, characterized in that, The pinholes are semi-circular, semi-elliptical, or polygonal.

8. The module housing according to claim 1, characterized in that, The number of the extensions is multiple, and the extensions are provided on at least one set of opposite sides of the body.

9. The module housing according to claim 8, characterized in that, The two extensions located on a set of opposite sides of the main body are symmetrically arranged.

10. A speaker module, characterized in that, Includes the module housing as described in any one of claims 1-9.

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