Steel mesh

Abstract

The utility model discloses a steel mesh which comprises a plate body, the plate body is suitable for being laid on a PCB, the plate body comprises a first plate, a second plate and a plurality of connecting plates, the first plate is provided with a circular through hole penetrating through the first plate in the thickness direction of the first plate, the second plate is arranged in the circular through hole, and the outer circumferential face of the second plate and the inner circumferential face of the circular through hole are spaced. The connecting plates are arranged in the circular through hole and located between the first plate and the second plate, the connecting plates are arranged in the circumferential direction of the circular through hole at intervals, the two ends of each connecting plate are connected with the first plate and the second plate respectively, meshes are defined between every two adjacent connecting plates and between the first plate and the second plate, and the meshes are suitable for being filled with welding flux. The extending direction of the connecting plate intersects with the radial direction of the circular through hole to form an included angle. The steel mesh has the advantages of simple structure, low cost and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of surface mounting, in particular to a steel mesh. Background Art

[0002] SMT is a technology that directly solders components to pads (also called solder joints) on a PCB (printed circuit board) using solder such as solder paste. It is widely used in the production of various electronic products such as mobile phones, televisions, computers, communication equipment, and household appliances.

[0003] In the related art, the steel mesh of the microphone is not set properly, which results in the solder paste of the microphone not being in a closed loop and causing the speaker to howl. Utility Model Content

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] In related technologies, such as Figure 2 As shown, after the steel mesh is removed from the PCB board, there is no solder paste at the position of the connecting plate 1' on the PCB board corresponding to the steel mesh. During welding, due to the large width of the connecting plate 1' of the steel mesh, the distance between two adjacent solder blocks (the solder in the mesh is called a solder block) will be large. When the solder paste is melted and solidified, there may be a gap between the two adjacent solder blocks, which will lead to poor sealing around the sound inlet of the microphone and cause the speaker howling problem.

[0006] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0007] To this end, an embodiment of the utility model provides a steel mesh with a reasonable structure and capable of solving the problem of microphone howling.

[0008] The steel mesh according to the embodiment of the utility model includes: a plate body, which is suitable for being laid on a PCB board, and the plate body includes a first plate, a second plate and a plurality of connecting plates, the first plate is provided with a circular through hole which penetrates the first plate along its thickness direction, the second plate is arranged in the circular through hole and the outer circumference of the second plate is spaced from the inner circumference of the circular through hole, the plurality of connecting plates are all arranged in the circular through hole and are located between the first plate and the second plate, the plurality of connecting plates are spaced along the circumference of the circular through hole and the two ends of each connecting plate are respectively connected to the first plate and the second plate, a mesh hole is defined between two adjacent connecting plates, the first plate and the second plate, the mesh hole is suitable for filling solder, and the extension direction of the connecting plate intersects with the radial direction of the circular through hole at an angle.

[0009] The steel mesh of the embodiment of the utility model is arranged such that the extension direction of the connecting plate intersects with the radial direction of the circular through hole at an angle, so that when the solder melts, adjacent solder blocks can be diffused along the circumference of the circular through hole to a closed ring, so as to eliminate the noise information in the microphone, thereby solving the problem of microphone howling caused by the solder paste not having a closed loop.

[0010] In some embodiments, the plurality of connecting plates are arranged at equal intervals along the circumference of the circular through hole, and the width of each connecting plate is 0.12 mm-0.16 mm.

[0011] In some embodiments, the angle between the extension direction of each of the connecting plates and the radial direction of the circular through hole is not less than 30°.

[0012] In some embodiments, the cross-sectional area of ​​each of the connecting plates is constant along the length direction of the connecting plate.

[0013] In some embodiments, the plurality of connecting plates include a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate, the second connecting plate and the third connecting plate are all arranged in the circular through hole and located between the first plate and the second plate, and the first connecting plate, the second connecting plate and the third connecting plate are equally spaced along the circumference of the circular through hole to define a first mesh, a second mesh and a third mesh.

[0014] In some embodiments, the first plate is provided with a first hole and a second hole penetrating the first plate along the thickness direction thereof, the first hole and the second hole are arranged opposite to each other along the radial direction of the circular through hole, and the first hole and the second hole are both located on one side of the circular through hole and spaced apart from the circular through hole, and the first hole and the second hole are both suitable for filling solder.

[0015] In some embodiments, the number of the plurality of connecting plates is no less than 3.

[0016] In some embodiments, the second plate is a circular plate, and the center of the second plate coincides with the center of the circular through hole.

[0017] In some embodiments, a diameter of the second plate is greater than a diameter of the sound receiving hole of the PCB board.

[0018] In some embodiments, the first plate, the second plate, and the connecting plate have equal thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a steel mesh according to an embodiment of the utility model.

[0020] Figure 2 It is a structural schematic diagram of a steel mesh in the related art.

[0021] Steel mesh 100;

[0022] Board 1

[0023] First plate 2;

[0024] Second board 3;

[0025] Connecting plate 4; first connecting plate 41; second connecting plate 42; third connecting plate 43;

[0026] Mesh 5; first mesh 51; second mesh 52; third mesh 53;

[0027] First sub-hole 6; second sub-hole 7;

[0028] The connecting plate 1' of the steel mesh. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0030] The steel mesh according to the embodiment of the present invention is described below with reference to the accompanying drawings.

[0031] like Figure 1 As shown, the steel mesh 100 according to the embodiment of the present invention includes a plate body 1.

[0032] The board body 1 is suitable for being laid on a PCB board. The board body 1 includes a first board 2, a second board 3 and a plurality of connecting boards 4. The first board 2 is provided with a circular through hole which penetrates the first board 2 along its thickness direction. The second board 3 is arranged in the circular through hole and the outer circumference of the second board 3 is spaced apart from the inner circumference of the circular through hole. The plurality of connecting boards 4 are all arranged in the circular through hole and are located between the first board 2 and the second board 3. The plurality of connecting boards 4 are spaced apart along the circumference of the circular through hole and the two ends of each connecting board 4 are respectively connected to the first board 2 and the second board 3. A mesh 5 is defined between two adjacent connecting boards 4, the first board 2 and the second board 3. The mesh 5 is suitable for filling solder (for example, solder paste). The extension direction of the connecting board 4 intersects with the radial direction of the circular through hole at an angle.

[0033] Specifically, Figure 1As shown, the plate body 1 can be a rectangular steel plate, the first plate 2 is provided with a circular through hole penetrating the plate body 1 along the front-to-back direction, the second plate 3 is arranged in the circular through hole and the outer circumference of the second plate 3 and the inner circumference of the circular through hole are arranged at intervals, the connecting plate 4 extends in the inside-outside direction and is located between the first plate 2 and the second plate 3, the two ends of the connecting plate 4 are respectively fixedly connected to the inner circumference of the circular through hole and the outer circumference of the second plate 3 (for example: integrally formed, bonded, welded, etc.), the connecting plate 4 is used to maintain the integrity of the mesh 5 to prevent the second plate 3 from detaching from the circular through hole, and the two adjacent connecting plates 4, the inner circumference of the circular through hole and the second The outer peripheral surface of the board 3 defines a mesh hole 5, and the board body 1 can be laid on the PCB board. The first board 2, the second board 3 and the connecting board 4 are used to prevent the solder from contacting the PCB board. The mesh hole 5 and the pad (solder point) on the PCB board are arranged relative to each other in the up and down directions. The solder covers the pad through the mesh hole 5. The steel mesh 100 is removed and the microphone is placed on the PCB board, wherein the sound receiving hole of the microphone is located at the position of the second board 3. A reflow soldering process is performed to melt the solder paste between the microphone and the PCB board into a liquid state, cool and solidify it, and solidify the microphone on the PCB board to complete the assembly of the microphone on the PCB board.

[0034] The steel mesh 100 of the embodiment of the utility model is arranged so that the extension direction of the connecting plate 4 intersects with the radial direction of the circular through hole at an angle, so that the vertical distance D between two adjacent solder blocks (the solder in the mesh 5 is called a solder block) is reduced. When the solder melts, the adjacent solder blocks are diffused along the circumference of the circular through hole to form a closed ring to eliminate the noise information in the microphone, thereby solving the problem of microphone howling caused by the solder paste not having a closed loop.

[0035] In some embodiments, a plurality of connecting plates 4 are arranged at equal intervals along the circumference of the circular through hole, and the width of each connecting plate 4 is less than 0.08 mm-0.12 mm. Figure 1 As shown, a plurality of connecting plates 4 are arranged at equal intervals along the circumference of the circular through hole, so that the plurality of connecting plates 4 are evenly distributed between the first plate 2 and the second plate 3 to ensure that the connecting plates 4 are subjected to uniform force. The width of the connecting plates 4 can be any one of 0.08 mm, 0.09 mm, 0.10 mm, 0.11 mm and 0.12 mm. Preferably, the width of the connecting plates 4 can be 0.10 mm. If the width of the connecting plates 4 is less than 0.08 mm, the width of the connecting plates 4 will be smaller, resulting in the connecting plates 4 being easily broken due to tension, thereby reducing the service life of the steel mesh 100 and causing uneven solder filling. When the width of the connecting plates 4 is greater than 0.12 mm, the width of the connecting plates 4 will be larger, resulting in the spacing between two adjacent mesh holes 5 being too large, which may cause the solder to fail to close during welding.

[0036] In some embodiments, the angle between the extension direction of each connecting plate 4 and the radial direction of the circular through hole is not less than 30°. Figure 1 As shown, the angle between the extension direction of the connecting plate 4 and the radial direction of the circular through hole can be any one of 30°, 40°, 50°, and 60°. Preferably, the angle between the extension direction of the connecting plate 4 and the radial direction of the circular through hole is 30°. When the angle between the extension direction of the connecting plate 4 and the radial direction of the circular through hole is less than 30°, the angle is too small to cause the two adjacent vertical distances to be too large, which affects the diffusion of the solder and thus affects the closure of the solder.

[0037] In some embodiments, the cross-sectional area of ​​each connecting plate 4 is constant along the length direction of the connecting plate 4. Specifically, Figure 1 As shown, each connecting plate 4 is a rectangular plate with a constant cross-sectional area along the inner and outer directions, and the cross-sectional area of ​​each connecting plate 4 is equal, which ensures the strength of the connecting plate 4 and makes the setting of the steel mesh 100 more reasonable.

[0038] In some embodiments, the plurality of connecting plates 4 include a first connecting plate 41, a second connecting plate 42, and a third connecting plate 43. The first connecting plate 41, the second connecting plate 42, and the third connecting plate 43 are all disposed in the circular through hole and between the first plate 2 and the second plate 3. The first connecting plate 41, the second connecting plate 42, and the third connecting plate 43 are equally spaced along the circumference of the circular through hole to define a first mesh 51, a second mesh 52, and a third mesh 53. Specifically, as Figure 1 As shown, the first connecting plate 41, the second connecting plate 42 and the third connecting plate 43 are all located in the circular through hole and between the first plate 2 and the second plate 3. The first connecting plate 41, the second connecting plate 42 and the third connecting plate 43 are arranged at equal intervals along the circumference of the circular through hole, and one end of the first connecting plate 41, one end of the second connecting plate 42 and one end of the third connecting plate 43 are all connected to the inner circumferential surface of the circular through hole, and the other end of the first connecting plate 41, the other end of the second connecting plate 42 and the other end of the third connecting plate 43 are all connected to the outer circumferential surface of the second plate 3. The first connecting plate 41, the second connecting plate 42 and the third connecting plate 43 define a first mesh 51, a second mesh 52 and a third mesh 53. Therefore, solder is applied to the PCB board through the first mesh 51, the second mesh 52 and the third mesh 53, so that the setting of the steel mesh 100 is more reasonable.

[0039] In some embodiments, the first plate 2 is provided with a first hole 6 and a second hole 7 penetrating the first plate 2 along the thickness direction thereof, the first hole 6 and the second hole 7 are arranged opposite to each other along the radial direction of the circular through hole, and the first hole 6 and the second hole 7 are both located on one side of the circular through hole and are arranged at intervals from the circular through hole, and the first hole 6 and the second hole 7 are both suitable for filling solder. Specifically, as Figure 1As shown, the first hole 6 and the second hole 7 are both rectangular holes and are located below the circular through hole. The first hole 6 and the second hole 7 are spaced apart in the left-right direction, and the first hole 6 and the second hole 7 are filled with solder. The lead wires of the microphone are respectively soldered to the first hole 6 and the second hole 7 by soldering, which can also stabilize the microphone.

[0040] In some embodiments, the number of the plurality of connecting plates 4 is not less than 3. Specifically, the number of the connecting plates 4 can be one of 3, 4, and 5. When the number of the connecting plates 4 is less than 3, the connection between the first plate 2 and the second plate 3 will be unstable, and deformation or damage may occur easily during use. Therefore, the number of the connecting plates 4 of the steel mesh 100 of the embodiment of the utility model is not less than 3, which ensures the stability of the connection between the first plate 2 and the second plate 3, and makes the setting of the steel mesh 100 more reasonable.

[0041] Since the sound receiving hole of the microphone is generally circular, in some embodiments, the second plate 3 is a circular plate, the center of the second plate 3 coincides with the center of the circular through hole, and the diameter of the second plate 3 is greater than the diameter of the sound receiving hole of the PCB board. Figure 1 As shown, the shape of the second plate 3 is circular, and the diameter of the second plate 3 is smaller than the diameter of the circular through hole and larger than the diameter of the sound receiving hole of the microphone, so that the shape of the second plate 3 is similar to the shape of the sound receiving hole of the microphone. When the second plate 3 is covered on the PCB board, the second plate 3 completely covers the position of the sound receiving hole of the microphone on the PCB board to prevent the solder from filling the position of the sound receiving hole of the microphone on the PCB board, and the center of the second plate 3 coincides with the circle of the circular through hole, which can ensure that the distance between the second plate 3 and the circular through hole is equal everywhere, ensuring that the solder is evenly filled on the PCB board, thereby ensuring the stability of welding.

[0042] In some embodiments, the first plate 2, the second plate 3 and the connecting plate 4 have the same thickness. Figure 1 As shown, the first plate 2, the second plate 3 and the connecting plate 4 are of equal size in the front-to-back direction, thereby ensuring the depth of the mesh 5 and the amount of solder filled, preventing one side of the inner circumference of the mesh 5 from being too low, resulting in insufficient solder filling, or one side of the mesh 5 from being too high, resulting in increased processing and manufacturing costs of the steel mesh 100, thereby making the setting of the steel mesh 100 more reasonable.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A steel mesh, characterized in that: The invention comprises: a plate body, wherein the plate body is suitable for being laid on a PCB board, the plate body comprises a first plate, a second plate and a plurality of connecting plates, the first plate is provided with a circular through hole penetrating the first plate along the thickness direction thereof, the second plate is arranged in the circular through hole and the outer circumference of the second plate is spaced apart from the inner circumference of the circular through hole, a plurality of connecting plates are arranged in the circular through hole and are located between the first plate and the second plate, a plurality of connecting plates are spaced apart along the circumference of the circular through hole and the two ends of each connecting plate are respectively connected to the first plate and the second plate, a mesh hole is defined between two adjacent connecting plates, the first plate and the second plate, the mesh hole is suitable for filling solder, and the extension direction of the connecting plate intersects with the radial direction of the circular through hole at an angle.

2. The steel mesh according to claim 1, characterized in that: The plurality of connecting plates are arranged at equal intervals along the circumference of the circular through hole, and the width of each connecting plate is 0.12 mm-0.16 mm.

3. The steel mesh according to claim 1, characterized in that: The angle between the extension direction of each connecting plate and the radial direction of the circular through hole is not less than 30°.

4. The steel mesh according to claim 1, characterized in that: The cross-sectional area of ​​each connecting plate is constant along the length direction of the connecting plate.

5. The steel mesh according to claim 1, characterized in that: The multiple connecting plates include a first connecting plate, a second connecting plate and a third connecting plate. The first connecting plate, the second connecting plate and the third connecting plate are all arranged in the circular through hole and located between the first plate and the second plate. The first connecting plate, the second connecting plate and the third connecting plate are equally spaced along the circumference of the circular through hole to define a first mesh, a second mesh and a third mesh.

6. The steel mesh according to claim 1, characterized in that: The first plate is provided with a first hole and a second hole which penetrate the first plate along the thickness direction thereof, the first hole and the second hole are arranged opposite to each other along the radial direction of the circular through hole, and the first hole and the second hole are both located on one side of the circular through hole and are spaced apart from the circular through hole, and the first hole and the second hole are both suitable for filling solder.

7. The steel mesh according to claim 1, characterized in that: The number of the plurality of connecting plates is no less than 3.

8. The steel mesh according to claim 1, characterized in that: The second plate is a circular plate, and the center of the second plate coincides with the center of the circular through hole.

9. The steel mesh according to claim 8, characterized in that: The diameter of the second plate is greater than the diameter of the sound receiving hole of the PCB board.

10. The steel mesh according to claim 1, characterized in that: The first plate, the second plate and the connecting plate have the same thickness.

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