Belt type high-pitch vibrating diaphragm forming device with arc-shaped structure

Abstract

A belt type high-pitch vibrating diaphragm forming device with an arc-shaped structure comprises a pressing device, a laser device, a folding device, a cutting device and a positioning device, and the laser device is used for cutting metal foil to form a metal circuit layer; the pressing device is used for hot-pressing the metal circuit layer to fit the metal circuit layer on the base layer; the folding device is used for folding the pressed product into a wave shape; the cutting device is used for cutting the wavy vibrating diaphragm into a required shape, and the positioning device is used for assembling and forming the wavy vibrating diaphragm and the outer frame; the vibrating diaphragm provided by the utility model has extremely high frequency response and excellent tone quality performance in performance. And the production cost can be saved in process manufacturing, the structural design of the shape of the product can also enable the product to have better sound listening performance, and a plurality of different materials and different product shapes can be combined and matched. The high-frequency ductility of the vibrating diaphragm is better, the distortion rate is lower, and the horizontal directivity is wide. And the product has the advantages of flexibility, diversification and customization.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragms, in particular to a forming device for a belt-type high-frequency diaphragm with an arc structure. Background Art

[0002] The shape of a conventional belt-type high-frequency diaphragm is basically square, and circuits are formed by chemical etching on a polyimide (PI) material. However, the range of material selection for this type of belt-type high-frequency diaphragm is very limited, and only polyimide (PI) materials can be used for circuit etching. Moreover, the materials and shapes of conventional belt-type high-frequency diaphragms are relatively single, and the driving range and effective sounding area of the diaphragms are small, resulting in poor product use effects. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a forming device for a belt-type high-frequency diaphragm with an arc structure to address the deficiencies in the prior art.

[0004] A forming device for a belt-type high-frequency diaphragm with an arc structure includes a pressing device, a laser device, a folding device, a cutting device, and a positioning device. The laser device cuts and processes a metal foil to form a metal circuit layer; the pressing device thermally presses and forms the metal circuit layer onto a base layer; the folding device folds the pressed product into a wavy shape; the cutting device cuts the wavy diaphragm into a required shape, and the positioning device assembles and forms the wavy diaphragm with an outer frame. The folding device includes a first folding device and a corresponding second folding device. A plurality of folding patches are provided on the opposite sides of the first folding device and the second folding device, and the folding patches on the first folding device and the second folding device are arranged in parallel and offset. A semi-finished diaphragm is placed between the first folding device and the second folding device, and the folding patches between the two are respectively inserted into the gaps between the two folding patches facing each other to fold the semi-finished diaphragm into a wavy structure. The positioning device includes an upper die and a lower die disposed directly below it. A boss is provided on the bottom surface of the upper die, and a plurality of long grooves are provided on the bottom surface of the boss. A limiting groove is provided on the top surface of the lower die, and a plurality of parallel convex strips are provided in the middle of the limiting groove. The boss and the limiting groove are arranged corresponding to each other up and down, and the convex strips are inserted into the corresponding long grooves.

[0005] Further, the first folding device and the second folding device are arranged corresponding to each other left and right, and the folding patches extend horizontally.

[0006] Further, both the first folding device and the second folding device include vertically extending mounting plates. The folding patches are provided on the inner side surfaces of the two mounting plates, and the free end surfaces on the inner sides of the folding patches are arc-shaped.

[0007] Furthermore, a non - folding area is also provided outside the folding patch area of the first folding device and the second folding device.

[0008] Furthermore, the first folding device and the second folding device are arranged opposite to each other vertically. The folding patch is arranged on the bottom surface of the first folding device and the top surface of the second folding device, and the folding patch extends vertically.

[0009] To sum up, the present utility model adopts the design of a special diaphragm structure and a cut - metal circuit board structure, enabling the diaphragm to have more advantageous materials in material selection. High - molecular materials (one or more composites of PEEK, PEI, and PU) that are lighter than polyimide (PI) materials can be used, making the high - frequency ductility of the diaphragm better, the distortion rate lower, and having the advantage of a wide horizontal directivity. The accordion - type folding device is used to fold the semi - finished diaphragm, which not only has high working efficiency and product quality, but also makes the diaphragm have a circular or oval structure after assembly, not limited to the traditional square. This makes the product flexible, diverse, and customizable. The diaphragm prepared by the present utility model has extremely high frequency response and excellent sound quality performance. Different processes can save production costs, and the structural design of the product shape can also make the product perform better in sound listening, and various different materials and different product shape combinations can be used. It has strong practicability and is of popularization significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of a belt - type high - frequency diaphragm with an arc structure of the present utility model;

[0011] Figure 2 is Figure 1 a cross - sectional schematic diagram of;

[0012] Figure 3 Two different schematic structural diagrams of the semi - finished diaphragm;

[0013] Figure 4 is a partial structural schematic diagram of the folding device;

[0014] Figure 5 is a structural schematic diagram of the positioning device;

[0015] Figure 6 is Figure 5 a structural schematic diagram of another perspective of the positioning device in;

[0016] Figure 7 is a cross - sectional structural schematic diagram of the positioning device;

[0017] Figure 8 and Figure 9It is a comparison diagram of high-frequency sound pressure level curves and a comparison diagram of distortion curves between a traditional PI diaphragm and the belt-type high-frequency diaphragm in the present utility model. Detailed implementation manners

[0018] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further details the utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0019] As Figures 1 to 2 shown, the present utility model provides a belt-type high-frequency diaphragm with an arc structure. The belt-type high-frequency diaphragm with an arc structure includes a diaphragm 10 and an outer frame 20 surrounding the outside of the diaphragm 10. The cross-section of the diaphragm 10 is arranged in a wavy shape. The diaphragm 10 includes a wavy folding area 101 in the middle and a fitting area 102 arranged outside the folding area 101. A plurality of convex strips are arranged side by side on the folding area 101, and the protruding directions of adjacent convex strips are opposite. Grooves 21 are arranged on two opposite side edges of the outer frame 20, and the grooves 21 extend inward to the fitting area 102 of the diaphragm 10. The fitting area 102 is attached to one end face of the outer frame 20, and the folding area 101 is accommodated in the inner cavity of the outer frame 20.

[0020] The diaphragm 10 includes a base layer 12 and a metal circuit layer 13 arranged on the base layer 12. The metal circuit layer 13 is pasted on the base layer 12 through an adhesive layer 14. In this embodiment, the metal circuit layer 13 is a metal sheet formed by punching or laser engraving of a metal material. In this embodiment, the material of the metal circuit layer 13 is aluminum foil or copper foil. The material of the base layer 12 is a composite of one or more materials among PEEK, PEI, and PU; more specifically, the base layer 12 is a composite of multiple materials with different materials.

[0021] In another embodiment, the diaphragm 10 includes a metal circuit layer 13 and base layers 12 arranged on the upper and lower sides of the metal circuit layer 13. The metal circuit layer 13 and the base layers 12 are bonded through an adhesive layer 14.

[0022] The utility model discloses a forming device for a belt-type high-frequency diaphragm with an arc structure, which is used to form a belt-type high-frequency diaphragm with an arc structure as described above. The forming device for a belt-type high-frequency diaphragm with an arc structure includes a pressing device (not shown in the figure), a laser device (not shown in the figure), a folding device 30, a cutting device (not shown in the figure) and a positioning device 40. The laser device is a conventional device, which is used to process a metal foil to form a metal circuit layer 13. The pressing device is a conventional hot pressing and forming device, which is used to hot press and form the metal circuit layer 13 onto a semi-finished diaphragm. The folding device 30 folds the pressed product into a wavy shape; the cutting device is a conventional device, which can achieve the cutting function, and is used to cut the wavy diaphragm into a required shape. The positioning device 40 assembles and forms the wavy diaphragm 10 and the outer frame 20.

[0023] The folding device 30 includes a first folding device 31 and a second folding device 32 which are arranged oppositely. In this embodiment, the first folding device 31 and the second folding device 32 are arranged in left-right alignment. The first folding device 31 and the second folding device 32 are closed to form a wavy diaphragm structure from a semi-finished diaphragm, or separated to take out the formed product.

[0024] Both the first folding device 31 and the second folding device 32 include a mounting plate and a plurality of folding patches 311 arranged on the mounting plate. The mounting plate 311 is arranged vertically, and the plurality of folding patches 311 are arranged horizontally and extend in a row and are connected to the inner side surface of the mounting plate 311. The folding patches 311 on the first folding device 31 and the second folding device 32 are arranged on the opposite side surfaces of the two mounting plates. The inner free end surface of the folding patch 311 is arranged in an arc shape, and its radian is the same as the radian of the convex part at the corresponding position of the diaphragm. The folding patches 311 on the first folding device 31 and the second folding device 32 are arranged in a parallel and staggered manner, and the distance between two folding patches 311 on the same folding device is greater than the thickness of the folding patch 311 on the other folding device; thus, they can be closed and crossed to form an overlapping area.

[0025] In addition, the first folding device 31 and the second folding device 32 can be arranged in an up-down corresponding manner, or in a horizontal left-right corresponding manner. The folding patches 311 on the first folding device 31 and the second folding device 32 can be closed left-right or closed up-down for forming. The first folding device 31 and the second folding device 32 are provided with non-folding areas outside the folding patch 311 area, and the outer peripheral edge of the plate-shaped semi-finished diaphragm extends out of the non-folding area from the folding patch 311 area to form the bonding area 102.

[0026] During operation, first place the semi-finished diaphragm between the first folding device 31 and the second folding device 32, and its outer edge should extend out of the folding device. The first folding device 31 and the second folding device 32 are closed, and the semi-finished diaphragm is clamped between them. The inner end parts of the first folding device 31 and the second folding device 32 cross each other, and the adjacent folding patches 311 fold the semi-finished diaphragm up and down in sequence to form a wavy structure for the semi-finished diaphragm. The overlapping length of the intersection of the first folding device 31 and the second folding device 32 is the wave crest height of the wavy structure, which can be adjusted according to requirements; if the wavy arch is higher, the overlapping area is longer; otherwise, it is shorter.

[0027] The positioning device 40 includes an upper die 41 and a lower die 42 arranged directly below it. A boss 411 is provided on the bottom surface of the upper die 41, and a number of long grooves 412 are provided on the bottom surface of the boss 411. A limit groove 421 is provided on the top surface of the lower die 42, and a number of protruding strips 422 arranged side by side are provided in the middle of the limit groove 421. Cut the folded and formed wavy base material into the required shape, and place the base material in the limit groove 421 of the lower die 42. The boss 411 and the limit groove 421 are arranged corresponding to each other up and down, the protruding strip 422 is embedded in the corresponding long groove 412, the outer frame 20 is placed in the limit groove 421, the outer end of the diaphragm 10 is embedded in the outer frame, and the middle part is placed between the protruding strip 422 and the long groove 412. Apply adhesive at the connection position between the two to assemble and fix the outer frame 20 and the diaphragm 10.

[0028] The forming device for forming a belt-type high-frequency diaphragm with an arc structure specifically includes the following steps:

[0029] Step 1: Prepare a semi-finished diaphragm;

[0030] Compound a protective film on one side of the metal foil, then coat an adhesive layer on the surface of the metal foil. After the surface adhesive layer is dried, use a laser process to engrave the pattern and remove the excess waste. Heat and bond the engraved metal circuit layer 13 to the base layer 12 using a forming device, and then tear off the protective film of the metal circuit layer 13.

[0031] In addition, in another embodiment, an adhesive layer can also be coated on both the upper and lower sides of the metal circuit layer 13, and the base layer 12 is respectively bonded to both the upper and lower sides of the metal circuit layer 13; a semi-finished diaphragm structure with a sandwich structure is formed.

[0032] Step 2: Form a wavy diaphragm;

[0033] A folding device 30 is provided. The folding device 30 includes a first folding device 31 and a second folding device 32 which are oppositely arranged. In this embodiment, the first folding device 31 and the second folding device 32 are arranged in left - right alignment. The first folding device 31 and the second folding device 32 are closed - molded to form a corrugated diaphragm structure from a semi - finished diaphragm, or separated to take out the formed product.

[0034] Both the first folding device 31 and the second folding device 32 include a mounting plate and a plurality of folding patches 311 arranged on the mounting plate. The mounting plate 311 is arranged vertically, and the plurality of folding patches 311 are arranged horizontally and extend in a row and are connected to the inner side surface of the mounting plate 311. The folding patches 311 on the first folding device 31 and the second folding device 32 are arranged on the opposite side surfaces of the two mounting plates. The free inner end surface of the folding patch 311 is arranged in an arc shape, and its radian is the same as the radian of the convexity at the corresponding position of the diaphragm. The folding patches 311 on the first folding device 31 and the second folding device 32 are arranged in a parallel offset manner, and the distance between two folding patches 311 on the same folding device is greater than the thickness of the folding patches 311 on the other folding device; thus, they can be closed and crossed to form an overlapping area.

[0035] In addition, the first folding device 31 and the second folding device 32 can be arranged in an up - down correspondence or a horizontal left - right correspondence. The folding patches 311 on the first folding device 31 and the second folding device 32 can be closed left - right or closed - molded up - down. The first folding device 31 and the second folding device 32 are provided with non - folding areas outside the folding patch 311 area. The outer peripheral edge of the plate - shaped semi - finished diaphragm extends out of the non - folding area from the folding patch 311 area to form the fitting area 102.

[0036] During operation, first place the semi - finished diaphragm between the first folding device 31 and the second folding device 32, and its outer edge should extend out of the folding device. The first folding device 31 and the second folding device 32 are closed - molded to clamp the semi - finished diaphragm between them. The inner end parts of the first folding device 31 and the second folding device 32 cross each other, and the adjacent folding patches 311 fold the semi - finished diaphragm up and down in sequence to make the semi - finished diaphragm form a corrugated structure. The overlapping length of the cross - overlap of the first folding device 31 and the second folding device 32 is the peak height of the corrugated structure, which can be adjusted according to requirements; if the corrugated arch is higher, the overlapping area is longer; otherwise, it is shorter.

[0037] Step three: Press - fit and assemble;

[0038] A positioning device 40 is provided. The positioning device 40 includes an upper die 41 and a lower die 42 disposed directly below it. A boss 411 is provided on the bottom surface of the upper die 41, and a plurality of long grooves 412 are provided on the bottom surface of the boss 411. A limiting groove 421 is provided on the top surface of the lower die 42, and a plurality of protruding strips 422 arranged side by side are provided in the middle of the limiting groove 421. The folded and formed wavy base material is cut into a required shape, glue is applied to the upper surface of the diaphragm bonding area 102, and the diaphragm is placed in the limiting groove 421 of the lower die 42. The boss 411 and the limiting groove 421 are arranged corresponding to each other up and down, the protruding strips 422 are embedded in the corresponding long grooves 412, the outer frame 20 is placed above the diaphragm bonding area 102 in the limiting groove 421, and the middle folding part 101 is placed between the protruding strips 422 and the long grooves 412. To ensure the bonding stability, glue can also be supplemented at the connection position between the two, and then pressed together to assemble and fix the outer frame 20 and the diaphragm 10.

[0039] As Figure 8 shown in the figure, it is a comparison chart of three experimental curves of a traditional PI material diaphragm 60, a belt-type high-frequency diaphragm 61 with a PEEK material base layer in the present invention, and a belt-type high-frequency diaphragm 62 with a PU material base layer. Among them, for the traditional PI material diaphragm 60, the high frequency is 4.7 kHz; for the PEEK belt-type high-frequency diaphragm 61, the high frequency is 1.2 kHz; for the belt-type high-frequency diaphragm 62 made of PU material, the high frequency is 1.1 kHz. From the above comparison, it can be seen that the high-frequency extension performance of the PEEK and PU material belt-type high-frequency diaphragms in the present invention is better, and the high frequency can be made lower, which also has great advantages in the distortion performance of the product. Figure 9

[0040] In summary, the present invention adopts a special diaphragm structure and a design of cutting the metal circuit board structure, so that there are more advantageous materials in the material selection of the diaphragm. High molecular materials (one or more composites of PEEK, PEI, and PU) lighter than polyimide (PI) materials can be used, making the high-frequency ductility of the diaphragm better and the distortion rate lower, with the advantage of a wide horizontal directivity. The semi-finished diaphragm is folded by an accordion hinge type folding device, which not only has high working efficiency and product quality, but also makes the diaphragm circular or elliptical after assembly, not limited to the traditional square. It makes the product flexible, diverse, and customizable. The diaphragm prepared by the present invention has extremely high frequency response and excellent sound quality performance. Different in the process production can save production costs, and the structural design of the product shape can also make the product perform better in sound listening, and various different materials and different product shape combinations can be used. It has strong practicability and has the significance of promotion.

[0041] ​The above-described embodiments merely represent some implementation manners of the utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several variations and improvements can still be made, and these all fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A belt-type high-frequency diaphragm forming device with an arc-shaped structure, characterized in that: It includes a lamination device, a laser device, a folding device, a cutting device and a positioning device. The laser device cuts and processes a metal foil to form a metal circuit layer; the lamination device thermally presses and forms the metal circuit layer onto a base layer; The folding device folds the laminated product into a wavy shape; the cutting device cuts the wavy diaphragm into a required shape, and the positioning device assembles and forms the wavy diaphragm and an outer frame; the folding device includes a first folding device and a corresponding second folding device. A plurality of folding patches are provided on the opposite sides of the first folding device and the second folding device. The folding patches on the first folding device and the second folding device are arranged in parallel and offset. The semi-finished diaphragm is placed between the first folding device and the second folding device, and the folding patches between the two are inserted into the gaps between the two folding patches facing each other, so as to fold the semi-finished diaphragm into a wavy structure; the positioning device includes an upper die and a lower die arranged directly below it. A boss is provided on the bottom surface of the upper die, and a plurality of long grooves are provided on the bottom surface of the boss; a limiting groove is provided on the top surface of the lower die, and a plurality of parallel convex strips are provided in the middle of the limiting groove; the boss and the limiting groove are arranged corresponding to each other up and down, and the convex strips are embedded in the corresponding long grooves.

2. The belt-type high-frequency diaphragm forming device with an arc-shaped structure according to claim 1, characterized in that: The first folding device and the second folding device are arranged corresponding to each other left and right, and the folding patches extend horizontally.

3. The belt-type high-frequency diaphragm forming device with an arc-shaped structure according to claim 2, characterized in that: Both the first folding device and the second folding device include vertically extending mounting plates, and the folding patches are arranged on the inner side surfaces of the two mounting plates. The free end surfaces on the inner sides of the folding patches are arranged in an arc shape.

4. The belt-type high-frequency diaphragm forming device with an arc-shaped structure according to claim 2, wherein: The first folding device and the second folding device are also provided with non-folding areas outside the folding patch areas.

5. The belt-type high-frequency diaphragm forming device with an arc structure according to claim 1, characterized in that: The first folding device and the second folding device are arranged opposite to each other up and down, and the folding patches are arranged on the bottom surface of the first folding device and the top surface of the second folding device, and the folding patches extend vertically.

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