A hole structure of a double-layer surface screen and a burr-free through-hole method

Abstract

The present invention relates to a hole structure of a double-layer mesh and a burr-free through-hole method, belonging to the technical field of mesh cover connection. An inner layer mesh and an outer layer mesh are provided, the inner layer mesh is buckled on a sound box, the outer layer mesh is wrapped around the surface of the inner layer mesh, the inner layer mesh is provided with a plurality of inner layer holes, the outer layer mesh is provided with a plurality of outer layer holes, the plurality of inner layer holes are matched with the plurality of outer layer holes in a one-to-one correspondence, any inner layer hole is coaxially connected with the corresponding outer layer hole, so that the sound emitted from the sound box forms a primary sound wave after passing through the inner layer mesh, and since the structures of the inner layer mesh and the outer layer mesh are the same, the primary sound wave forms a secondary sound wave after passing through the outer layer mesh, and since the difference between the secondary sound wave and the primary sound wave is not much different, its sound quality will not be significantly reduced, thereby ensuring the timbre quality of the sound in the sound box emitted from the mesh structure.

Description

Technical Field

[0001] The invention belongs to the technical field of mesh cover connection, and in particular relates to a hole structure of a double-layer mesh and a burr-free through-hole method. Background Art

[0002] With the improvement of people's quality of life and the development of intelligent technology, smart home appliances (such as smart multimedia speakers) are rapidly entering people's daily lives. In order to protect the exposed speaker unit and meet the needs of appearance, a mesh cover is usually provided on the speaker. The mesh cover is connected to the speaker body and covers the speaker unit, thereby protecting the speaker unit and having a good appearance.

[0003] For example, the utility model patent with patent authorization announcement number: CN209358716U discloses a mesh connection structure and a speaker. The mesh connection structure is used to connect the mesh and the speaker body. The mesh is provided with a positioning column and a first buckle arranged around the axis of the mesh. The speaker body is provided with a positioning hole and a second buckle arranged around the axis of the speaker body. The axis of the positioning column and the positioning hole is parallel to the axis of the mesh. When the mesh is connected to the speaker body, the positioning column moves along the axis of the mesh to embed into the positioning hole, and the first buckle and the second buckle are interlocked.

[0004] Based on the search of the above patent authorization announcement number and the shortcomings found therein:

[0005] The existing mesh structure is provided with a double-layer mesh structure in consideration of its stability and firmness when installed on the speaker. The sound emitted from the speaker forms a primary sound wave after passing through the inner mesh structure, and the primary sound wave forms a secondary sound wave after passing through the outer mesh structure. Due to the characteristics of sound wave propagation, the greater the difference between the inner and outer mesh structures, the greater the difference between the primary and secondary sound waves, which in turn leads to the attenuation of some sound waves, thereby reducing the quality of the sound emitted from the mesh. Summary of the invention

[0006] In order to solve the problem that the sound in the speaker will affect the sound quality of the speaker when passing through the outer layer mesh of the existing double-layer mesh structure, the present invention provides a hole structure of a double-layer mesh and a burr-free through-hole method.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A double-layer mesh hole structure, comprising an inner layer mesh and an outer layer mesh, wherein the inner layer mesh is buckled on the sound box, and the outer layer mesh is wrapped around the surface of the inner layer mesh;

[0009] The inner layer mesh is provided with a plurality of inner layer holes, which do not overlap with each other; the outer layer mesh is provided with a plurality of outer layer holes, which correspond to each other one by one, and any inner layer hole is coaxially connected with the corresponding outer layer hole.

[0010] As a preferred technical solution of the present invention, the inner layer mesh and the outer layer mesh together form an upward-facing mesh structure, and the mesh structure includes an annular edge, an inclined annular surface and a top drum surface, all of which are arranged in an annular shape. The inner wall surface of the annular edge is sealed and fitted at the top buckle of the sound box, the inclined annular surface is inclined, the bottom end surface of the inclined annular surface is fitted and connected to the top end surface of the annular edge, and the edge surface of the top drum surface is fitted to the top end surface of the inclined annular surface.

[0011] As a preferred technical solution of the present invention, the inclination angle between the top drum surface and the horizontal plane is smaller than the inclination angle between the inclined annular surface and the horizontal plane.

[0012] As a preferred technical solution of the present invention, the inner layer holes and the corresponding outer layer holes together form a through hole, and the through holes located in the same row of the surface mesh structure together form a through hole group, and several through hole groups are arranged on the surface mesh structure at equal intervals along the vertical direction of the surface mesh structure; several through holes in the same through hole group are arranged on the surface mesh structure at equal intervals along the horizontal direction of the surface mesh structure.

[0013] As a preferred technical solution of the present invention, the projection of the through hole onto the horizontal plane is a long hole with circular arcs at both ends, and the axial direction of the through hole is parallel to the horizontal direction of the mesh structure.

[0014] As a preferred technical solution of the present invention, in the same through-hole group, the gap between two adjacent through-holes is located in the middle of the corresponding through-holes of the two adjacent upper and lower through-hole groups.

[0015] As a preferred technical solution of the present invention, the penetration hole located on the top drum surface is arranged perpendicular to the top surface of the sound box, and the penetration hole located on the inclined annular surface is arranged perpendicular to the side wall surface of the inclined annular surface.

[0016] As a preferred technical solution of the present invention, from the outer layer mesh to the inner layer mesh, the aperture of the inner layer holes gradually increases, and the aperture of the outer layer holes gradually decreases; the radius of the smallest hole of the outer layer holes is 0.1 mm larger than the radius of the smallest hole of the inner layer holes.

[0017] As a preferred technical solution of the present invention, the outer layer mesh is made of TPU material; the inner layer mesh is made of PC material; the thickness of the outer layer mesh is less than the thickness of the inner layer mesh, and the angle between the two ends of the outer layer hole is 20°, and the angle between the two ends of the inner layer hole is 7°.

[0018] A burr-free through-hole method for a hole structure of a double-layer surface mesh comprises the following steps:

[0019] S1: First, clamp the mesh structure;

[0020] S2: using a first penetration drill to open the outer layer hole on the outer layer mesh in a direction from the outer layer mesh to the inner layer mesh;

[0021] S3: using a second penetration drill to open the inner layer hole on the inner layer mesh in a direction from the inner layer mesh to the outer layer mesh, wherein the inner layer hole is coaxially arranged with the outer layer hole;

[0022] S4: repeating steps S2-S3 until the inner layer holes and the outer layer holes are both opened better than the corresponding surface mesh;

[0023] S5: using a first arc-shaped knife to open an outer arc groove on the outer side of the outer hole;

[0024] S6: using a second arc-shaped knife to open an inner arc groove on the outer side of the inner hole;

[0025] S7: Repeat steps S5-S6 until all outer holes have outer arc grooves formed on their outer sides; and all inner holes have inner arc grooves formed on their outer sides.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a hole structure of a double-layer mesh and a burr-free through-hole method, wherein an inner layer mesh and an outer layer mesh are provided, the inner layer mesh is buckled on a sound box, the outer layer mesh is wrapped on the surface of the inner layer mesh, the inner layer mesh is provided with a plurality of inner layer holes, the outer layer mesh is provided with a plurality of outer layer holes, the plurality of inner layer holes are matched with the plurality of outer layer holes in a one-to-one correspondence, any inner layer hole is coaxially connected with the corresponding outer layer hole, so that the sound emitted from the sound box forms a primary sound wave after passing through the inner layer mesh, and since the structures of the inner layer mesh and the outer layer mesh are the same, the primary sound wave forms a secondary sound wave after passing through the outer layer mesh, and since the secondary sound wave is connected to the primary sound wave The difference in sound waves is not large, and the sound quality does not decrease significantly, which ensures the quality of the sound emitted from the speaker through the surface mesh structure. The existing mesh structure takes into account its stability and firmness when installed on the speaker, and is provided with a double-layer mesh structure. The sound emitted from the speaker forms a primary sound wave after passing through the inner mesh structure, and the primary sound wave forms a secondary sound wave after passing through the outer mesh structure. Due to the characteristics of sound wave propagation, the greater the difference between the inner and outer mesh structures, the greater the difference between the primary and secondary sound waves, which leads to the attenuation of some sound waves, thereby reducing the quality of the sound emitted from the mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0029] Figure 1 A top view of the hole structure of a double-layer surface mesh of the present invention;

[0030] Figure 2 A side cross-sectional view of a hole structure of a double-layer surface mesh of the present invention;

[0031] Figure 3 For the present invention Figure 2 Enlarged view of point A.

[0032] Description of main symbols

[0033] In the figure: 1. surface mesh structure; 101. annular edge; 102. inclined annular surface; 103. top drum surface; 104. through hole; 2. inner surface mesh; 201. inner layer hole; 3. outer surface mesh; 301. outer layer hole. DETAILED DESCRIPTION

[0034] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0035] See also Figure 1-3This embodiment provides a double-layer mesh hole structure, including an inner layer mesh 2 and an outer layer mesh 3, wherein the inner layer mesh 2 is buckled on the speaker, and the outer layer mesh 3 is wrapped around the surface of the inner layer mesh 2;

[0036] The inner layer mesh 2 is provided with a plurality of inner layer holes 201, and the plurality of inner layer holes 201 do not overlap with each other; the outer layer mesh 3 is provided with a plurality of outer layer holes 301, and the plurality of inner layer holes 201 are matched one by one with the plurality of outer layer holes 301, and any inner layer hole 201 is coaxially connected with the corresponding outer layer hole 301. Such an arrangement enables the sound emitted from the speaker to form a primary sound wave after passing through the inner layer mesh 2. Since the structures of the inner layer mesh 2 and the outer layer mesh 3 are the same, the secondary sound wave formed by the primary sound wave after passing through the outer layer mesh 3 is not much different from the primary sound wave. The sound quality does not decrease significantly, ensuring the quality of the sound emitted from the speaker through the mesh structure 1. The existing mesh structure is solved in consideration of its stability and firmness when installed on the speaker. A double-layer mesh structure is provided. The sound emitted from the speaker forms a primary sound wave after passing through the inner mesh structure, and the primary sound wave forms a secondary sound wave after passing through the outer mesh structure. Due to the characteristics of sound wave propagation, the greater the difference between the inner and outer mesh structures, the greater the difference between the primary and secondary sound waves, which leads to the attenuation of some sound waves, thereby reducing the quality of the sound emitted from the mesh.

[0037] Furthermore, the inner layer mesh 2 and the outer layer mesh 3 of the present scheme jointly form an upward-drumming surface mesh structure 1, and the surface mesh structure 1 includes an annular edge 101, an inclined annular surface 102 and a top drum surface 103, all of which are arranged in an annular shape. The inner wall surface of the annular edge 101 is sealed and fits well at the top buckle of the sound box, the inclined annular surface 102 is arranged at an angle, the bottom end surface of the inclined annular surface 102 is fitted and connected to the top end surface of the annular edge 101, and the edge surface of the top drum surface 103 is fitted and connected to the top end surface of the inclined annular surface 102. It is worth noting that the inclination angle of the top drum surface 103 of the present scheme with the horizontal plane is smaller than the inclination angle of the inclined annular surface 102 with the horizontal plane.

[0038] It is worth mentioning that the inclined annular surface 102 of the present scheme includes an inner inclined annular surface and an outer inclined annular surface, the inner inclined annular surface is a part of the inner layer mesh 2, the outer inclined annular surface is a part of the outer layer mesh 3, and the bottom surface of the inner inclined annular surface and the top surface of the speaker are interlocked, the annular edge 101 is arranged on the bottom surface of the outer inclined annular surface, and the inner side of the annular edge 101 extends to the bottom surface of the inner inclined annular surface, and the inner side of the annular edge 101 can lock or release its matching relationship extending to the bottom surface of the inner inclined annular surface; with such a setting, when the inner layer mesh 2 is fastened to the speaker, the inner side of the annular edge 101 needs to be deformed so that its entirety is located on the bottom surface of the outer inclined annular surface, so that the annular edge 101 is sealed and fastened to the fastening point between the speaker and the mesh, and the annular edge 101 also provides a force pressing inward at the fastening point between the speaker and the mesh, further improving the connection force between the speaker and the mesh.

[0039] Furthermore, the inner layer holes 201 of the present invention and the corresponding outer layer holes 301 together form a through hole 104, and the through holes 104 located in the same row of the mesh structure 1 together form a through hole group, and several through hole groups are arranged on the mesh structure 1 at equal intervals along the vertical direction of the mesh structure 1; several through holes 104 in the same through hole group are arranged on the mesh structure 1 at equal intervals along the horizontal direction of the mesh structure 1; it is worth noting that the projection of the through hole 104 of the present invention onto the horizontal plane is a long strip hole with arcs at both ends, and the axis of the through hole 104 is The direction of the line is parallel to the horizontal direction of the mesh structure 1. Through such a setting, since the propagation mode of sound is similar to that of water drops falling on the water surface, it continues to diffuse outward away from the center of the sound. The through hole 104 is set in the shape of a long strip hole, and the through hole 104 is set on the mesh structure 1 as much as possible, it is to ensure that the timbre of the present scheme is directly transmitted to the outside of the mesh structure 1 through the through hole 104, rather than transmitting the timbre to the outside by penetrating the mesh structure 1, thereby ensuring that the timbre quality is transmitted from the speaker to the outside of the mesh structure 1 without being significantly affected.

[0040] Furthermore, since the shape of the through hole 104 is a long strip, the long strip-shaped through hole 104 has a structural effect that the two ends are not easily deformed, but the middle is easy to deform. Therefore, in order to ensure that the mesh structure 1 of this scheme can still ensure its structural quality while providing through holes 104 as much as possible, this scheme is located in the same through hole group, and the gap between two adjacent through holes 104 is located in the middle of the corresponding through holes 104 of the adjacent upper and lower groups of through holes. The gap can support the structure of the corresponding through holes 104 at the upper and lower ends, so that the middle structure of the through holes 104 is not easy to deform.

[0041] Furthermore, in the present embodiment, the through hole 104 on the top drum surface 103 is arranged perpendicular to the top surface of the sound box, and the through hole 104 on the inclined annular surface 102 is arranged perpendicular to the side wall surface of the inclined annular surface 102. This is because the inclination angle between the top drum surface 103 of the present embodiment and the horizontal plane is smaller than the inclination angle between the inclined annular surface 102 and the horizontal plane; in addition, the inclination angle of the top drum surface 103 of the present embodiment toward the upper drum is not large, while the inclination angle of the inclined annular surface 102 is larger. Therefore, through such an arrangement, the proportion of the through hole 104 on the mesh structure 1 is increased as much as possible, so that the sound in the sound box can directly pass through the mesh structure 1 to the outside through the through hole 104 as much as possible, rather than directly passing through the mesh structure 1 to the outside, thereby reducing the loss of sound quality.

[0042] Furthermore, in the present solution, the aperture of the inner hole 201 increases gradually, and the aperture of the outer hole 301 decreases gradually from the outer layer mesh 3 to the inner layer mesh 2; the radius of the smallest hole of the outer hole 301 is 0.1 mm larger than the radius of the smallest hole of the inner hole 201. This arrangement makes the through hole 104 of the present solution a column with large apertures at both ends and a small aperture in the middle. When the sound in the speaker box passes through the through hole 104, the vibration in the middle of the through hole 104 increases due to the small aperture in the middle of the through hole 104. 4, after processing, burrs are likely to exist at the connection between the inner hole 201 and the outer hole 301. Specifically, the burrs will be located on the end surface of the outer hole 301 close to the inner hole 201. Since the radius of the smallest hole of the outer hole 301 is 0.1mm larger than the radius of the smallest hole of the inner hole 201, in fact, the connection between the burr and the outer hole 301 is not firm. When sound is emitted from the speaker, the vibration in the middle of the through hole 104 increases, which will cause the burrs attached to the middle of the through hole 104 to fall off, thereby achieving the purpose of no burrs.

[0043] It is worth mentioning that the outer layer mesh 3 of the present solution is made of TPU material; the inner layer mesh 2 is made of PC material; therefore, the outer layer mesh 3 is a flexible mesh, and the inner layer mesh 2 is a rigid mesh. Based on this, in order to ensure the structural support strength of the inner layer mesh 2 of the present solution, the thickness of the outer layer mesh 3 of the present solution is less than the thickness of the inner layer mesh 2. In addition, in order to ensure the mutual coordination between the outer layer hole 301 and the inner layer hole 201 of the present solution, the angle between the two ends of the outer layer hole 301 of the present solution is 20°, and the angle between the two ends of the inner layer hole 201 is 7°.

[0044] A burr-free through-hole method for a hole structure of a double-layer surface mesh comprises the following steps:

[0045] S1: First, clamp the mesh structure 1 to prepare for the next hole opening.

[0046] S2: using a first penetration drill to drill an outer hole 301 on the outer mesh 3 in the direction from the outer mesh 3 to the inner mesh 2, at which point burrs exist at the connection points between the outer hole 301 and both ends of the outer mesh 3;

[0047] S3: Using a second penetration drill, an inner hole 201 is opened on the inner layer mesh 2 in the direction from the inner layer mesh 2 to the outer layer mesh 3, and the inner hole 201 is coaxially arranged with the outer hole 301; since the radius of the smallest hole of the outer hole 301 in this scheme is 0.1 mm larger than the radius of the smallest hole of the inner hole 201, burrs exist at the connection between the inner hole 201 and the outer hole 301, and the burrs are concentrated on the 0.1 mm wide end surface of the outer hole 301 close to the inner hole 201;

[0048] S4: repeating steps S2-S3 until the inner layer holes 201 and the outer layer holes 301 are both opened better than the corresponding surface mesh;

[0049] S5: using a first arc knife to open an outer circular arc groove on the outer side of the outer hole 301 , so that the burrs at the end of the outer hole 301 away from the inner hole 201 fall off.

[0050] S6: using a second arc knife to open an inner circular arc groove on the outer side of the inner hole 201; by opening the inner circular arc groove, the burr located at the end of the inner hole 201 away from the outer hole 301 falls off.

[0051] S7: Repeat steps S5-S6 until all outer holes 301 have outer arc grooves formed on their outer sides; and all inner holes 201 have inner arc grooves formed on their outer sides.

[0052] S8: Then, snap the mesh structure 1 onto the corresponding speaker, start the speaker, and use the vibration of the sound produced by the speaker to remove the burrs on the 0.1 mm wide end surface of the outer hole 301 close to the inner hole 201.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A hole structure of a double-layer surface mesh, characterized in that: It includes an inner layer mesh and an outer layer mesh, wherein the inner layer mesh is buckled on the sound box, and the outer layer mesh is wrapped around the surface of the inner layer mesh; The inner layer mesh is provided with a plurality of inner layer holes, which do not overlap with each other; the outer layer mesh is provided with a plurality of outer layer holes, which are matched one by one with the plurality of inner layer holes, and any of the inner layer holes is coaxially connected with the corresponding outer layer hole; The inner layer mesh and the outer layer mesh together form a surface mesh structure facing upward, and the surface mesh structure includes an annular edge, an inclined annular surface and a top drum surface, all of which are arranged in an annular shape. The inner wall surface of the annular edge is sealed and fitted at the top buckle of the sound box, the inclined annular surface is inclined, the bottom end surface of the inclined annular surface is fitted and connected with the top end surface of the annular edge, and the edge surface of the top drum surface is fitted with the top end surface of the inclined annular surface; The inner layer holes and the corresponding outer layer holes together form a through hole, and the through holes located in the same row of the mesh structure together form a through hole group, and several through hole groups are arranged on the mesh structure at equal intervals along the vertical direction of the mesh structure; several through holes in the same through hole group are arranged on the mesh structure at equal intervals along the horizontal direction of the mesh structure; The penetration hole located on the top drum surface is arranged perpendicular to the top surface of the sound box, and the penetration hole located on the inclined annular surface is arranged perpendicular to the side wall surface of the inclined annular surface; In the direction from the outer layer mesh to the inner layer mesh, the aperture of the inner layer holes gradually increases, and the aperture of the outer layer holes gradually decreases; the radius of the smallest hole of the outer layer holes is 0.1 mm larger than the radius of the smallest hole of the inner layer holes; The outer layer mesh is made of TPU material; the inner layer mesh is made of PC material; the thickness of the outer layer mesh is less than the thickness of the inner layer mesh, and the angle between the two ends of the outer layer hole is 20°, and the angle between the two ends of the inner layer hole is 7°.

2. The hole structure of the double-layer mesh according to claim 1, characterized in that: The inclination angle between the top drum surface and the horizontal plane is smaller than the inclination angle between the inclined annular surface and the horizontal plane.

3. The hole structure of the double-layer mesh according to claim 2, characterized in that: The projection of the through hole onto the horizontal plane is a long hole with arcs at both ends, and the axial direction of the through hole is parallel to the horizontal direction of the mesh structure.

4. The hole structure of the double-layer mesh according to claim 3, characterized in that: In the same penetration hole group, the gap between two adjacent penetration holes is located in the middle of the corresponding penetration holes in the upper and lower adjacent penetration hole groups.

5. A burr-free through-hole method for a hole structure of a double-layer surface mesh, applicable to the hole structure of the double-layer surface mesh according to claim 4, characterized in that: The following steps are involved: S1: First, clamp the mesh structure; S2: using a first penetration drill to open the outer layer hole on the outer layer mesh in a direction from the outer layer mesh to the inner layer mesh; S3: using a second penetration drill to open the inner layer hole on the inner layer mesh in a direction from the inner layer mesh to the outer layer mesh, wherein the inner layer hole is coaxially arranged with the outer layer hole; S4: repeating steps S2-S3 until the inner layer holes and the outer layer holes are both opened better than the corresponding surface mesh; S5: using a first arc-shaped knife to open an outer arc groove on the outer side of the outer hole; S6: using a second arc-shaped knife to open an inner arc groove on the outer side of the inner hole; S7: Repeat steps S5-S6 until all outer holes have outer arc grooves formed on their outer sides; and all inner holes have inner arc grooves formed on their outer sides.

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