Optimization design method of horn cover and horn cover

Abstract

The application provides a kind of optimization design method and loudspeaker cover of loudspeaker cover, it is related to the technical field of loudspeaker cover of head-worn earphone, including S1, the appearance surface of shell is designed in three-dimensional software;S2, the material of shell is selected, each material corresponds a minimum thickness delta;S3, based on the appearance surface designed and the material selected, the thickness of appearance surface is valued, and the three-dimensional reference model T with the minimum thickness delta is obtained;S4, the inside surface of three-dimensional reference model T is arranged in meshing reinforcement, and the to-be-calculated model T1 is obtained, then the volume V of to-be-calculated model T1 is calculated;S5, optimization experiment is carried out, and selectable parameter is calculated.The application, by adopting reasonable loudspeaker cover structure and design method, can efficiently and quickly obtain a group of loudspeaker cover design schemes, thereby reducing test cost, shortening product cycle, and a group of different grade products can be designed according to demand, to meet market demand.

Description

Technical Field

[0001] This invention relates to the field of speaker cap technology for headphones, specifically to an optimized design method for speaker caps and a speaker cap itself. Background Technology

[0002] Over-ear headphones are headphones worn on the head, usually consisting of two earcups that cover the entire ear, providing better sound isolation and sound quality. The speaker covers on them mainly serve to protect the internal components of the speaker, while also serving as decoration or enhancing the speaker's appearance.

[0003] In today's fast-paced era of electronic product upgrades and replacements, the market cycle of electronic products is relatively short. People hope to develop new electronic products efficiently and quickly to seize market share. However, traditional speaker cover design requires continuous testing, resulting in a long product cycle. Different styles of each product need to be designed separately, which makes it impossible for the development cycle of new products to meet the needs of the fast-paced upgrades of electronic products. Therefore, this invention provides an optimized design method for speaker covers and a speaker cover. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an optimized design method and a speaker cover, solving the problems of traditional speaker cover design methods that require continuous testing, have long product cycles, and require separate design for different styles of each product, which makes it impossible to meet the needs of the fast-paced upgrading of electronic products.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An optimized design method for a horn cover, the horn cover comprising a housing and reinforcing members arranged in a grid pattern and integrally formed with the housing inside the housing;

[0007] Specifically, the following steps are included:

[0008] S1. Design the outer surface of the shell in 3D software;

[0009] S2. Select the material of the shell. Each material corresponds to a minimum thickness δ.

[0010] S3. Based on the designed curved surface and the selected material, assign a value to the thickness of the curved surface to obtain a three-dimensional reference model T with a minimum thickness δ.

[0011] S4. Reinforcing components are arranged in a mesh on the inner surface of the three-dimensional reference model T to obtain the model to be verified, T1. Then, the volume V of the model to be verified, T1, is calculated. All key points of the model to be verified, T1, meet the requirements of the static strength test experiment.

[0012] S5. Conduct optimization experiments and calculate the optional parameters;

[0013] S6. Select one set of data from the optional parameters based on the shell thickness of the closely connected shell, the product quality grade, and the product processing difficulty, and then perform mold setting on the outer curved surface.

[0014] Preferably, each material corresponds to a minimum thickness δ, which is obtained by measuring the material calibration experiment;

[0015] Specifically, the material calibration experiment includes the following steps:

[0016] Select a material:

[0017] Select the test pressure value F according to the application scenario;

[0018] Prepare several calibration test pieces with gradually decreasing thickness;

[0019] The calibration test piece is placed on the test fixture for standard testing. A cylindrical test bar with a circular cross-section of 1 cm in diameter and a spherical head at the bottom is used for extrusion testing under pressure F. The minimum thickness for which the deformation meets the requirements is the minimum thickness δ of the material.

[0020] The test fixture includes an upper clamp and a lower clamp, both of which have a circular hole with a diameter of 2 cm.

[0021] Preferably, the width of the reinforcement is w and the height is h;

[0022] 3δ≤w≤10δ①;

[0023] 3δ≤h≤10δ②;

[0024] In equations ① and ②, δ represents the minimum thickness of the material used in the reinforcement.

[0025] Preferably, the key points in the model T1 to be calculated are determined based on the quality inspection requirements of the horn cover.

[0026] Preferably, step S5 further includes: manually removing some reinforcements that are subject to interference before calculating the minimum value a of the grid width in the gridded reinforcements and the maximum value b of the grid width in the gridded reinforcements.

[0027] Preferably, the gridded reinforcement includes transverse reinforcement and longitudinal reinforcement.

[0028] Preferably, step S6, which involves creating a mold body for the outer curved surface, includes:

[0029] The thickness of the outer surface is assigned according to the selected data to obtain the three-dimensional model D;

[0030] Based on the selected data, reinforcement components are arranged in a mesh on the inner surface of the 3D model D to obtain the final mold.

[0031] Another object of the present invention is to provide a horn cover, comprising:

[0032] A ring-shaped curved shell, wherein a rim is fixedly connected to the bottom edge of the ring-shaped curved shell, and a ring-shaped cover is fixedly connected to the top edge of the ring-shaped curved shell;

[0033] The inner surface of the annular curved shell is provided with grid-arranged reinforcing members;

[0034] The end of the annular cover has a transparent plate portion;

[0035] A connecting hole is provided on the side of the annular cover.

[0036] Preferably, the gridded reinforcement includes a plurality of first-direction reinforcements and a plurality of second-direction reinforcements, wherein the plurality of first-direction reinforcements and the plurality of second-direction reinforcements are staggered and arranged in a grid.

[0037] The first direction reinforcement is annular.

[0038] Preferably, the inner side of the edging is fixedly connected with multiple buckles.

[0039] This invention provides an optimized design method for a horn cover and a horn cover itself. It has the following beneficial effects:

[0040] 1. This invention, by employing a reasonable horn cover structure and design method, can calculate the external curved surface and selected materials of the horn cover design to obtain several sets of optional parameters. Based on the thickness of the shells with similar connections, product quality level, and product processing difficulty, one set of optional parameters can be selected, and the external curved surface can be molded. This allows for the efficient and rapid generation of a set of horn cover design schemes, thereby reducing testing costs, shortening product cycles, and enabling the design of a set of products of different grades to meet market demands.

[0041] 2. In this invention, the minimum thickness δ of each material is obtained through material calibration experiments, and the thickness of the curved surface is assigned to obtain a three-dimensional reference model T with a minimum thickness δ. Reinforcing components are arranged in a grid on the inner surface of the three-dimensional reference model T to obtain the model T1 to be verified. Under the premise that all key points of the model T1 to be verified meet the requirements of the static strength test experiment, the grid width in the gridded reinforcing components is maximized. The model volume V calculated under this state can provide a theoretical basis for subsequent calculations and ensure that the model obtained by subsequent optimization design has less redundancy. Attached Figure Description

[0042] Figure 1 This is a flowchart of an optimized design method for a horn cover proposed in this invention;

[0043] Figure 2 This is a first-view perspective perspective view of a horn cover proposed in this invention;

[0044] Figure 3 This is a front view of a horn cover proposed in this invention;

[0045] Figure 4 This is a second-view perspective perspective view of a horn cover proposed in this invention;

[0046] Figure 5 This is a three-dimensional schematic diagram of the test fixture for material calibration experiments in the optimized design method of a horn cover proposed in this invention.

[0047] Among them, 1. Annular curved shell; 2. Transparent plate; 3. Surrounding edge; 4. Annular cover; 5. Connecting hole; 6. Buckle; 7. Reinforcing member with grid arrangement; 701. Reinforcing member in the first direction; 702. Reinforcing member in the second direction; 8. Cylindrical test bar; 9. Upper clamp; 10. Lower clamp; 11. Sample to be tested. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1:

[0050] like Figure 1 As shown, this embodiment of the invention provides an optimized design method for a horn cover. The horn cover includes a shell and reinforcing members arranged in a grid pattern and integrally formed with the shell. The horn cover can be integrally formed using injection molding. The grid patterned reinforcing members are used to increase the structural strength of the shell.

[0051] The shell thickness is assigned based on the curved surface established by the designer. The gridded reinforcement is used to ensure that the shell has sufficient strength to meet the requirements of subsequent product testing. The grid width in the gridded reinforcement (a parameter that represents the density of the grid in the gridded reinforcement; for example, the side length of the square grid arranged on the curved surface when the surface is unfolded) can reflect the effectiveness of the gridded reinforcement.

[0052] The optimized design method for the horn cover specifically includes the following steps:

[0053] S1. Design the outer surface of the shell in 3D software.

[0054] Designers can divide the housing into zones based on its function, such as installation area, functional area, and housing area. The optimization design method of this speaker cover mainly targets the housing area. Users can extract the curved surfaces outside the housing area, thereby simplifying the subsequent optimization design.

[0055] S2. Select the material of the shell. Each material corresponds to a minimum thickness δ.

[0056] Each material corresponds to a minimum thickness δ, which is obtained through material calibration experiments. A specialized department conducts experiments on various materials to obtain the minimum thickness δ corresponding to each material and establishes a material database. Designers can directly obtain the data based on the selected material.

[0057] Specifically, the material calibration experiment includes the following steps:

[0058] Select a material and use it to make several calibration test pieces with gradually decreasing thickness.

[0059] Select the test pressure value F (unit: N) according to the application scenario; for example: considering that the force on the side of the horn cover is relatively small, it is sufficient to ensure that the shell does not deform. You can choose an experiment with F=5N, F=8N or F=10N.

[0060] The calibration test piece is placed on the test fixture for standard testing. A cylindrical test bar 8 with a circular cross-section of 1 cm in diameter and a spherical head at the bottom is used to perform a compression test under pressure F. The minimum thickness that meets the requirements for deformation is the minimum thickness δ of the material. That is, the minimum thickness that meets the design requirements for this material in a circular sheet with a diameter of 2 cm under edge support is generally accurate to 0.1 mm.

[0061] like Figure 5As shown, the test fixture includes an upper clamp 9 and a lower clamp 10. Both the upper clamp 9 and the lower clamp 10 have circular holes with a diameter of 2 cm. During testing, the sample 11 to be tested is placed between the upper clamp 9 and the lower clamp 10. The sample 11 to be tested at the circular holes of the upper clamp 9 and the lower clamp 10 is the actual part of the sample 11 to be tested. The cylindrical test rod 8 is installed on the pressing mechanism with pressure feedback. The pressing mechanism pushes the bottom end of the cylindrical test rod 8 through the circular hole of the upper clamp 9, and applies a test pressure F to the sample 11 to be tested. If the deformation meets the requirements, the experimental data is recorded. Then, the next set of experiments is performed, and so on for multiple sets of experiments. If the deformation does not meet the requirements in the next set of experiments, the thickness of the sample 11 to be tested in this set of experimental data is the minimum thickness δ of the material.

[0062] S3. Based on the designed outer surface and the selected material, assign a value to the thickness of the outer surface to obtain a three-dimensional reference model T with a minimum thickness δ.

[0063] S4. Then, reinforcement components are arranged in a mesh on the inner surface of the three-dimensional reference model T to obtain the model to be verified, T1. Then, the volume V of the model to be verified, T1, is calculated (automatically obtained by the three-dimensional software). Among them, all key points of the model to be verified, T1, meet the requirements of the static strength test experiment.

[0064] The thickness of the curved surface is assigned to obtain a three-dimensional reference model T with a minimum thickness δ. At this point, the structural strength of each surface of the three-dimensional reference model T is insufficient. Reinforcing components are arranged in a mesh on the inner surface of the three-dimensional reference model T to obtain the model T1 to be verified. The key points of the model T1 to be verified meet the requirements of the static strength test experiment, and the mesh width in the meshed reinforcing components is maximized as much as possible. The model T1 to be verified in this state can be considered as a model that uses less material but meets the structural strength requirements at each location. The calculated volume can be used to evaluate the model of subsequent optimization design. That is, if the volume of the subsequent optimization design is less than the volume V of the model T1 to be verified, it can be considered as moving towards positive optimization; otherwise, it is considered as not being optimized.

[0065] S5. Conduct optimization experiments and calculate the optional parameters.

[0066] Specifically, it includes:

[0067] a. Adjust the thickness of the three-dimensional reference model T to obtain an experimental model T with a thickness of δ + 0.1 * N * δ. N ;

[0068] b. In experimental model T N The inner surface is reinforced with meshed reinforcement components to obtain the model T to be calculated. N1 ;

[0069] While ensuring the model T to be calculated N1 Under the premise that the volume of the 3D model is less than or equal to the volume V, calculate the minimum value 'a' of the mesh width in the meshed reinforcement (by relying on the model volume recognition in the 3D software).

[0070] While ensuring the model T to be calculated N1 Under the premise that all key points meet the requirements of the static strength test experiment, calculate the maximum value b of the mesh width in the meshed reinforcement (completed by finite element analysis of the model in 3D software).

[0071] If there is an optional value between the maximum value b and the minimum value a of the mesh width, then the optional value will be compared with the 3D model T in the experiment. N The thickness δ+0.1*N*δ is saved as an optional parameter, with the data being (δ+0.1*N*δ, c), where c is any value between the maximum value b of the grid width and the minimum value a of the grid width.

[0072] The value of N ranges from 1 to 100, and each time N takes a value, an optional parameter can be calculated.

[0073] In the above data, under the same thickness parameter δ+0.1*N*δ, the closer the c value is to the maximum value b of the mesh width, the greater the design redundancy of the model; the closer the c value is to the minimum value a of the mesh width, the lower the manufacturing cost of the model.

[0074] This optimization experiment enables the rapid and efficient calculation of optional parameters and the design of the model shell thickness and internal mesh reinforcement components. Compared with the traditional process of relying on experience to determine data, then analyzing and optimizing, and repeatedly making samples, this method can reduce testing costs, shorten product cycles, and design a set of products of different grades according to needs to meet market demands.

[0075] S6. Select one set of data from the optional parameters based on the shell thickness of the closely connected shell, the product quality grade, and the product processing difficulty, and then perform mold setting on the outer curved surface.

[0076] The selection criteria are as follows: to ensure that δ+0.1*N*δ is as close as possible to the thickness of other shells connected to it; for horn covers with higher product quality, a larger design redundancy can be reserved; and some (δ+0.1*N*δ, c) data that are not easy to process should be discarded.

[0077] When a specific set of data is determined, the designer (or the computer automatically generates it based on programmatic instructions) completes the modeling of the external curved surface.

[0078] Specifically, this includes: assigning values ​​to the thickness of the outer curved surface according to the selected data to obtain a three-dimensional model D; then, arranging reinforcement parts in a mesh on the inner surface of the three-dimensional model D according to the selected data, and finally obtaining the fixed mold D1.

[0079] A sample is made for the fixed mold D1, and finally, through actual testing, if the product meets the actual testing requirements, the product design plan is completed.

[0080] Using this method, designers can quickly and efficiently complete the design of the model shell thickness and the internal mesh-arranged reinforcement components. Compared with the traditional process of relying on experience to determine data, then analyzing, optimizing, and repeatedly making prototypes, this method can reduce testing costs, shorten product cycles, and design a set of products of different grades according to requirements to meet market demands.

[0081] Laboratory testers conduct experiments on each material, with each material corresponding to a minimum thickness δ, creating a tabular database that provides data support for the subsequent development of new products and replacement of existing solutions.

[0082] The reinforcement uses a rib structure and has a rectangular strip material with a defined width and height. Specifically, the width of the reinforcement is w and the height is h.

[0083] General requirements:

[0084] 3δ≤w≤10δ①;

[0085] 3δ≤h≤10δ②;

[0086] In Equations ① and ②, δ represents the minimum thickness of the material used in the reinforcement, with w preferably being 4.2δ and h being 6.5δ.

[0087] In one embodiment, the key points in the model T1 to be calculated are determined based on the quality inspection requirements of the horn cover. N1 The key details are also determined based on the quality inspection requirements for the speaker cover; for example, Figure 2 The design is a specific horn cover, and the key points can be selected on the annular curved shell. 10-12 points are selected as force points for finite element force analysis.

[0088] In one embodiment, step S5 further includes: manually removing some reinforcements that are subject to interference before calculating the minimum value a of the grid width in the gridded reinforcements and the maximum value b of the grid width in the gridded reinforcements.

[0089] The reinforcements arranged in a grid may affect subsequent installation. Designers can delete some reinforcements according to actual needs.

[0090] In one embodiment, the gridded reinforcements include transverse reinforcements and longitudinal reinforcements, which are staggered to form a grid.

[0091] Example 2:

[0092] like Figures 2-4 As shown in the figure, an embodiment of the present invention provides a horn cover, including: an annular curved shell 1, a surrounding edge 3, an annular cover portion 4, and a grid-arranged reinforcement 7 disposed on the inner side of the annular curved shell 1.

[0093] A rim 3 is fixedly connected to the bottom edge of the annular curved shell 1. The rim 3 is used for installation and connection with other components of the earphone. An annular cover 4 is fixedly connected to the top edge of the annular curved shell 1. The annular curved shell 1 and the annular cover 4 are both external shaped surfaces of the speaker cover. A grid-arranged reinforcing member 7 is provided on the inner side of the annular curved shell 1. The grid-arranged reinforcing member 7 is used to enhance the structural strength of the annular cover 4, so that the overall material of the speaker cover is less and the strength meets the usage requirements.

[0094] The end of the annular cover 4 has a transparent plate 2, which is made of a transparent material. The inside of the transparent plate 2 is the display part of the headphone body (such as the matrix indicator light position and the display screen position). The side of the annular cover 4 is provided with a connecting hole 5, which is rotatably connected to the hinge part of the headphone.

[0095] In one embodiment, the gridded reinforcement 7 includes a plurality of first-direction reinforcements 701 and a plurality of second-direction reinforcements 702. The plurality of first-direction reinforcements 701 and the plurality of second-direction reinforcements 702 are staggered and arranged in a grid. Due to the influence of the shape of the annular curved shell 1, the first-direction reinforcements 701 are designed to be annular.

[0096] In one embodiment, a plurality of buckles 6 are fixedly connected to the inner side of the edging 3, and a slot corresponding to the buckles 6 is provided on the earphone body part connected to the speaker cover, so as to facilitate fastening the speaker cover to the earphone body.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for optimizing design of a horn cover, characterized in that: the horn cover comprises a shell and a reinforcing member arranged in a grid inside the shell and integrally formed with the shell; and the method comprises the following steps: S1, designing an outer curved surface of the shell in three-dimensional software; S2, selecting a material of the shell, each material corresponding to a minimum thickness δ; S3, assigning a thickness to the outer curved surface based on the designed outer curved surface and the selected material, to obtain a three-dimensional reference model T with a thickness of the minimum thickness δ; S4, arranging the reinforcing member in a grid on the inner side of the three-dimensional reference model T to obtain a to-be-calculated model T1, and then calculating a volume V of the to-be-calculated model T1; wherein each key point of the to-be-calculated model T1 meets the requirements of a static strength test experiment; S5, performing an optimization experiment to calculate selectable parameters, and further comprising manually removing part of the reinforcing member that is installed before calculating a minimum value a of a grid width of the reinforcing member arranged in a grid and calculating a maximum value b of the grid width of the reinforcing member arranged in a grid; S6, selecting one set of data from the selectable parameters according to the thickness of the connected shell, the product quality grade, and the product processing difficulty, and performing mold setting on the outer curved surface, specifically comprising: assigning a thickness to the outer curved surface according to the selected data to obtain a three-dimensional model D; and arranging the reinforcing member in a grid on the inner side of the three-dimensional model D according to the selected data, to finally obtain the mold setting; and step S5 specifically comprises: in the above data, the closer the value c is to the maximum value b of the grid width, the greater the design redundancy of the model, and the closer the value c is to the minimum value a of the grid width, the lower the manufacturing cost of the model; each minimum thickness δ corresponding to each material is obtained by material calibration experiment; specifically, the material calibration experiment comprises the following steps: selecting a material: selecting a test pressure value F according to the application scenario; manufacturing a plurality of calibration test pieces with gradually decreasing thicknesses; placing the calibration test pieces on a test fixture for standard testing, using a cylindrical test rod with a circular cross-section of 1 CM in diameter and a spherical head at the bottom end for extrusion testing under pressure F, and the minimum thickness that meets the deformation requirement is the minimum thickness δ of the material; wherein the test fixture comprises an upper clamp and a lower clamp, and each of the upper clamp and the lower clamp has a circular hole with a diameter of 2 CM; the width of the reinforcing member is w, and the height of the reinforcing member is h; 3δ≤w≤10δ ①; 3δ≤h≤10δ ②; wherein δ in formulas ① and ② is the minimum thickness of the material used by the reinforcing member. Each key point in the to-be-calculated model T1 is determined according to the quality inspection requirements of the horn cover. The reinforcing member arranged in a grid comprises a horizontal reinforcing member and a vertical reinforcing member; and comprising: a ring-shaped curved surface shell (1), a surrounding edge (3) is fixedly connected at the bottom edge of the ring-shaped curved surface shell (1), and a ring-shaped cover portion (4) is fixedly connected at the top edge of the ring-shaped curved surface shell (1); the inner side of the ring-shaped curved surface shell (1) is provided with a reinforcing member (7) arranged in a grid; and an end portion of the ring-shaped cover portion (4) has a transparent plate portion (2). ​ ​ ​ ​ ​ ​ ​ ​ ​ a、adjust the thickness of the three-dimensional reference model T to obtain an experimental model T with a thickness of δ+0.1*N*δ N ; b、In the experimental model T N The inner side of the grid arrangement reinforcement is obtained by the model T N1 to be calculated On the premise that the three-dimensional model volume of the to-be-accounted model T N1 , calculate the minimum value a of the grid width in the grid-arranged reinforcement. Under the premise that each key point of the to-be-accounted model T N1 satisfies the static strength test experiment requirement, the maximum value b of the grid width of the grid-arranged reinforcement is calculated. If there is an optional value between the maximum value b and the minimum value a of the mesh width, then the optional value will be compared with the 3D model T in the experiment. N The thickness δ+0.1*N*δ is saved as an optional parameter, with the data being (δ+0.1*N*δ, c), where c is any value between the maximum value b and the minimum value a of the grid width; where N takes the value 1-100, and each time N takes a value, an optional parameter can be calculated once; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The method of optimizing a design of a horn cover according to claim 1, wherein: ​ 3. The method of claim 1, wherein: ​ 4. A horn cover designed based on the design method of claim 1, characterized in that, ​ ​ ​ ​ The side surface of the annular cover part (4) is provided with a connecting hole (5); The reinforcing member (7) in the grid arrangement comprises a plurality of first direction reinforcing members (701) and a plurality of second direction reinforcing members (702), and the plurality of first direction reinforcing members (701) and the plurality of second direction reinforcing members (702) are arranged in a grid arrangement in an interlaced manner; The first direction reinforcing member (701) is annular.

5. A horn cover according to claim 4, wherein: The inner side of the surrounding edge (3) is fixedly connected with a plurality of buckles (6).

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