CN112954550B - Diaphragm and processing method thereof, loudspeaker structure and electronic equipment - Google Patents
Diaphragm and processing method thereof, loudspeaker structure and electronic equipment Download PDFInfo
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- CN112954550B CN112954550B CN202110158673.XA CN202110158673A CN112954550B CN 112954550 B CN112954550 B CN 112954550B CN 202110158673 A CN202110158673 A CN 202110158673A CN 112954550 B CN112954550 B CN 112954550B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
- H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
- H04R2231/001—Moulding aspects of diaphragm or surround
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/025—Diaphragms comprising polymeric materials
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/027—Diaphragms comprising metallic materials
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- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Multimedia (AREA)
- Laminated Bodies (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention discloses a vibrating plate and a processing method thereof, a loudspeaker structure and electronic equipment, wherein the vibrating plate is applied to the loudspeaker structure and comprises a main body and a packing layer, the main body comprises a first layer and a second layer which are arranged in a stacked mode, a convex rib protruding towards the direction far away from the second layer is arranged on the first layer, and a sealing cavity is formed in the convex rib; the filler layer is filled into the sealing cavity. The invention aims to improve the structural strength of the vibrating plate and effectively reduce the weight of the vibrating plate, so that the loudspeaker is convenient to process, high in structural strength and good in sound production quality.
Description
Technical Field
The present invention relates to the field of electroacoustic devices, and in particular, to a diaphragm, a method for processing the diaphragm, and a speaker structure and an electronic device using the diaphragm.
Background
Electronic devices such as mobile phones are gradually becoming thinner and thinner under the influence of market demands, and the requirements for sound quality are also becoming higher and higher, which also puts demands for small size, thinness, and high sound quality on acoustic devices. A speaker is an important component of audio equipment and communication equipment, and is a transducer device for converting an electric signal into an acoustic signal, and the quality of the performance of the speaker greatly affects the sound quality. The diaphragm of a loudspeaker mainly affects the high frequency performance of the loudspeaker, and its acoustic performance directly affects the performance of the acoustic device.
In the related art, the diaphragm of the speaker adopts a structure of two flat surface layers and a foaming layer arranged in the middle, but the thickness of the diaphragm is difficult to be thinned due to the limitation of processing of the foaming body of the middle foaming layer, and the foaming body has the problem of thinner foam wall, so that the molding structure of the foaming layer is unstable, and the structural strength of the diaphragm is influenced.
Disclosure of Invention
The invention mainly aims to provide a vibrating plate, a processing method thereof, a loudspeaker structure and electronic equipment, aiming at improving the structural strength of the vibrating plate and effectively reducing the weight of the vibrating plate, so that the loudspeaker is convenient to process, high in structural strength and good in sound quality.
In order to achieve the above object, the present invention provides a diaphragm applied to a speaker structure, the diaphragm including:
the main body comprises a first layer and a second layer which are arranged in a stacked mode, a convex rib protruding towards the direction far away from the second layer is arranged on the first layer, and a sealing cavity is formed in the convex rib; and
the filler layer is filled into the sealing cavity.
In one embodiment, the side of the first layer facing the second layer is recessed towards the side facing away from the second layer to form a recessed region, and the recessed region and the second layer enclose to form the sealed cavity.
In an embodiment, the first layer includes a first metal layer and a first adhesive film layer, which are stacked, and the recessed region is formed by the first adhesive film layer recessed toward the first metal layer;
the second layer includes second metal level and the second glued membrane layer of range upon range of setting, the second glued membrane layer with first glued membrane layer bonding connection.
In an embodiment, the first metal layer and/or the second metal layer is made of any one of aluminum foil, copper foil, titanium foil, magnesium alloy foil, and MMC;
and/or the modulus density ratio of the first metal layer and/or the second metal layer is more than 15GPa cm 3 /g；
And/or the first adhesive film layer and/or the second adhesive film layer is/are made of any one of an epoxy adhesive film, a phenolic adhesive film, an acrylate adhesive film, a silica gel adhesive film and a polyester adhesive film;
and/or the tensile modulus of the first adhesive film layer and/or the second adhesive film layer is more than 600MPa;
and/or the adhesive force of the first adhesive film layer and/or the second adhesive film layer is larger than 300gf/20mm;
and/or the thickness of the first layer and/or the second layer ranges from 0.004mm to 0.21mm.
In one embodiment, the first layer and/or the second layer are/is formed by compounding a fiber material and a prepreg resin, the fiber material is one of aramid fiber, carbon fiber or glass fiber, and the prepreg resin is any one of epoxy resin, phenolic resin, bismaleimide resin, vinyl resin, PA, PP, PC, PI and PEEK.
In one embodiment, when the first layer and/or the second layer is a unidirectional fabric, the areal density of the first layer and/or the second layer is in the range of 15g/m 2 ～150g/m 2 (ii) a Or when the first layer and/or the second layer is woven cloth, the surface density range of the first layer and/or the second layer is 25g/m 2 ～240g/m 2 ；
And/or the tensile modulus of the prepreg resin is more than 500MPa, and the bending strength of the prepreg resin is more than 60MPa;
and/or the content of the prepreg resin in the first layer and/or the second layer is 30-60%.
In one embodiment, the material of the packing layer is one of liquid foam or a foaming adhesive film;
or the material of the filler layer is one of foaming PET, PMI, PA, PVC, PE, PPS, PS, PU, epoxy foam or phenolic foam.
In one embodiment, the rib comprises a plurality of ribs;
the plurality of convex ribs are arranged in parallel and are arranged at intervals along the length direction or the width direction of the main body; or the plurality of convex ribs are arranged in a crossed manner and form included angles, and the included angles range from 0 degree to 90 degrees.
The invention also provides a processing method of the vibrating plate, which comprises the following steps:
providing a body comprising a first layer and a second layer;
laying the first layer on a lower die, and performing prepressing forming by using a first upper die to form a sunken area sunken towards the other side of the first layer;
filling a filler layer in the concave area;
laying the second layer on the first layer, and covering the opening of the depressed area to form a sealed cavity surrounded by the depressed area and the second layer;
and (3) closing the die by using a second upper die, heating to foam and form the filler layer in the sealed cavity, and demolding to obtain the vibrating plate.
In one embodiment, the step of filling the filler layer in the recessed region comprises:
and filling the filler layer in the depressed area, so that the volume ratio of the filler layer to the depressed area is 1/25-3/4.
The invention also provides a loudspeaker structure, which comprises a basin frame, and a magnetic circuit system and a vibration system which are accommodated in the basin frame, wherein the vibration system comprises the vibration plate.
In one embodiment, the vibration system further comprises:
the vibrating diaphragm is arranged opposite to the magnetic circuit system, the vibrating plate is arranged on the vibrating diaphragm, the magnetic circuit system is provided with a magnetic gap and a concave part, and the concave part is arranged corresponding to the convex rib of the vibrating plate; and
and one end of the voice coil is connected with the vibrating diaphragm or the vibrating plate, and the other end of the voice coil is suspended in the magnetic gap.
In one embodiment, the periphery of the vibrating plate is connected to the vibrating diaphragm, and the voice coil is connected to a side of the vibrating plate facing away from the vibrating diaphragm and disposed around the rib.
In one embodiment, the cross section shape and size of the convex rib are matched with the cross section shape and size of the concave part;
and/or the vibrating diaphragm is formed by compounding one or more materials of engineering plastics, elastomer materials and adhesive films;
and/or the thickness of the diaphragm is within the range of 0.01 mm-0.5 mm.
In one embodiment, the magnetic circuit system comprises:
the magnetic conduction yoke is arranged in the basin frame;
the central magnetic circuit part is arranged on the magnetic guide yoke, and the side of the central magnetic circuit part, which is back to the magnetic guide yoke, is provided with the concave part; and
and the side magnetic circuit part is arranged on the magnetic yoke and surrounds the central magnetic circuit part, and the magnetic gap is formed between the side magnetic circuit part and the central magnetic circuit part.
In an embodiment, the central magnetic circuit portion includes a central magnet and a central washer, the central magnet is disposed on the magnetic yoke, the central washer is disposed on a side of the central magnet facing away from the magnetic yoke, the central washer is provided with the recess, and the recess is of a groove structure or a through groove structure.
The invention also provides electronic equipment which comprises an equipment shell and the loudspeaker structure, wherein the loudspeaker structure is arranged in the equipment shell.
According to the technical scheme, the main body of the vibrating plate is provided with the first layer and the second layer which are arranged in a stacked mode, so that the first layer is provided with the convex ribs protruding towards the direction away from the second layer, and the structural strength of the main body of the vibrating plate is enhanced by the convex ribs; simultaneously, through set up sealed chamber in protruding muscle to locate sealed intracavity with the filler layer, thereby alleviate the weight of vibration board under the condition of ensureing structural strength, so can improve sensitivity, and improve the frequency response characteristic of high frequency. The vibrating plate provided by the invention not only improves the structural strength, but also effectively reduces the weight, and the loudspeaker is convenient to process, high in structural strength and good in sounding quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a vibrating plate according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a vibrating plate according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a vibrating plate according to another embodiment of the present invention;
FIG. 4 is a cross-sectional view of a vibrating plate according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a first layer or a second layer in accordance with an embodiment of the invention;
FIG. 6 is a graph comparing FR curves of the vibrating plate of the present invention and a conventional aluminum alloy vibrating plate;
FIG. 7 is a cross-sectional view illustrating a process of manufacturing a vibrating plate according to an embodiment of the present invention;
fig. 8 is a cross-sectional view of a speaker structure according to an embodiment of the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Vibrating |
410 | Magnetic |
| 1 | |
420 | Central magnetic circuit part |
| 1a | Sealed |
421 | |
| 11 | |
422 | |
| 111 | |
423 | |
| 112 | |
430 | Side |
| 113 | |
431 | |
| 12 | |
432 | |
| 121 | |
500 | Vibration system |
| 131 | A |
510 | Vibrating |
| 132 | |
511 | |
| 141 | First |
512 | Folded |
| 142 | Second |
513 | |
| 2 | |
520 | |
| 300 | |
600 | |
| 310 | Containing |
710 | Lower die |
| 400 | |
720 | First |
| 401 | |
730 | Second upper die |
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
Also, the expression "and/or" and/or "as used throughout is meant to encompass three alternatives, exemplified by" A and/or B "including alternative A, alternative B, or both alternative A and alternative B.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a vibration plate 100, and the vibration plate 100 is applied to a speaker structure 600. It is understood that the speaker structure 600 is applied to an electronic device, and the electronic device may be a mobile phone, a sound box, a computer, a headset, a watch, a television, or a tablet computer, and the like, and is not limited herein.
Referring to fig. 1 to 4, in an embodiment of the present invention, the vibrating plate 100 includes a main body 1 and a filler layer 2, wherein the main body 1 includes a first layer 11 and a second layer 12 which are stacked, a rib 112 protruding toward a direction away from the second layer 12 is disposed on the first layer 11, a sealed cavity 1a is disposed in the rib 112, and the filler layer 2 is filled in the sealed cavity 1a.
It is understood that the body 1 is a body structure of the vibration plate 100, and the body 1 may be a plate-shaped or sheet-shaped structure. The material of the main body 1 may be a metal material or a fiber material, and is not limited herein. In the present embodiment, the body 1 is illustrated as a plate-shaped structure, and the body 1 may be a single-layer structure or a multi-layer structure.
In the present embodiment, the main body 1 has a first surface 111 and a second surface 121 facing away from each other, and the main body 1 further has a side connecting the first surface 111 and the second surface 121. The body 1 comprises a first layer 11 and a second layer 12 arranged in a stack such that the side of the second layer 12 facing away from the first layer 11 is a second surface 121 and the side of the first layer 11 facing away from the second layer 12 is a first surface 111.
It can be understood that the rib 112 is protruded toward the direction away from the second layer 12 on the first layer 11, that is, the rib 112 is protruded on the first surface 111 of the body 1, so that the body 1 enhances the structural strength of the body 1 of the vibration plate 100 by the rib 112. In this embodiment, the second surface 121 of the main body 1 is a plane or flat plate structure, and the rib 112 of the first surface 111 of the main body 1 is a convex hull structure.
In this embodiment, the sealing cavity 1a is formed in the rib 112, and the packing layer 2 is filled in the sealing cavity 1a, so that the packing layer 2 is used to further enhance the structural strength of the rib 112, and compared with a vibration plate in a simple convex hull form, the structure can further enhance the overall structural strength.
The vibrating plate 100 of the present invention is configured by arranging the body 1 as the first layer 11 and the second layer 12 which are arranged in a stacked manner, so that the first layer 11 is provided with the convex rib 112 which protrudes in a direction away from the second layer 12, thereby enhancing the structural strength of the body 1 of the vibrating plate 100 by the convex rib 112; meanwhile, by disposing the sealed cavity 1a in the rib 112 and disposing the filler layer 2 in the sealed cavity 1a, the weight of the vibrating plate 100 is reduced while ensuring the structural strength, so that the sensitivity can be improved and the frequency response characteristic of high frequency can be improved. The vibrating plate 100 of the invention not only improves the structural strength, but also effectively reduces the weight, and the loudspeaker is convenient to process, high in structural strength and good in sound quality.
It can be understood that the vibration plate 100 of the present invention achieves the advantage of being lighter than the conventional vibration plate structure, and at the same time, the ribs 112 are formed on the first surface 111 of the vibration plate 100 to satisfy the performance requirements of the vibration plate 100, and the filling layer 2 is further filled in the sealed cavities 1a of the ribs 112, thereby further reinforcing the overall structure of the vibration plate 100. In this embodiment, the structure of the vibrating plate 100 can form the convex hull without destroying the cell structure in the filling layer 2, and this structure can not only reduce the mass and improve the medium frequency sensitivity, but also improve the rigidity of the vibrating plate and stably expand the high frequency.
In one embodiment, as shown in fig. 4, a side of the first layer 11 facing the second layer 12 is recessed toward a side facing away from the second layer 12 to form a recessed region 113, and encloses the second layer 12 to form a sealed cavity 1a.
In the present embodiment, the main body 1 is formed by a multi-layer structure, and the first layer 11 and the second layer 12 of the main body 1 are stacked, that is, the side of the first layer 11 facing away from the second layer 12 is a first surface 111, and the side of the second layer 12 facing away from the first layer 11 is a second surface 121.
It will be appreciated that the ribs 112 of the first surface 111 are recessed from the side of the first layer 11 facing the second layer 12 towards the side facing away from the second layer 12, such that the first surface 111 is convex and forms a rib 112 structure, and that the first layer 11 is formed with a recessed area 113 on the side facing the second layer 12, such that when the first layer 11 and the second layer 12 are stacked, the second layer 12 covers the opening of the recessed area 113, such that the recessed area 113 of the first layer 11 and the second layer 12 enclose the sealed chamber 1a.
Of course, in other embodiments, the rib 112 may be formed by protruding the first layer 11 at a side opposite to the second layer 12, that is, the rib 112 is directly formed by protruding the first surface 111, and the side of the first layer 11 facing the second layer 12 is a plane and is stacked with the second layer 12, which is not limited herein.
In this embodiment, the first layer 11 and the second layer 12 of the main body 1 may be made of the same material, for example, the first layer 11 and the second layer 12 may be made of a metal material or a fiber material, and are not limited herein. Of course, in other embodiments, the material of the first layer 11 and the material of the second layer 12 may be different, and are not limited herein.
In the present embodiment, the first layer 11 and the second layer 12 of the body 1 of the vibration plate 100 partially adhere to the filler layer 2 (for example, foam), the edge of the vibration plate 100 is formed by combining the first layer 11 and the second layer 12, and the middle region is partially reinforced (i.e., the rib 112), so that one surface of the body 1 has a flat plate structure and the other surface has a convex hull form. It will be appreciated that the ribs 112 of the first layer 11 may be preformed and filled and reinforced with the filler layer 2 in the recessed areas 113 of the first layer 11, so that the vibration plate 100 of the present embodiment can further enhance the rigidity of the whole body as compared with the vibration plate of the simple convex hull form.
In an embodiment, as shown in fig. 4 and 5, the first layer 11 includes a first metal layer 131 and a first adhesive film layer 141, which are stacked, and the recess region 113 is formed by the first adhesive film layer 141 recessed toward the first metal layer 131; the second layer 12 includes a second metal layer 132 and a second adhesive film layer 142, which are stacked, and the second adhesive film layer 142 is adhesively connected to the first adhesive film layer 141.
In this embodiment, the first layer 11 and the second layer 12 of the main body 1 are made of the same material, and in this case, the first layer 11 is composed of the first metal layer 131 and the first adhesive film layer 141, which are stacked, and the second layer 12 is composed of the second metal layer 132 and the second adhesive film layer 142, which are stacked. It is understood that when the first layer 11 and the second layer 12 are connected, the first adhesive film layer 141 of the first layer 11 is adhesively connected to the second adhesive film layer 142 of the second layer 12, that is, the side of the first metal layer 131 opposite to the first adhesive film layer 141 forms the first surface 111, and the side of the second metal layer 132 opposite to the second adhesive film layer 142 forms the second surface 121.
It is understood that the recess region 113 of the first layer 11 is formed by the first adhesive film layer 141 being recessed toward the first metal layer 131. In this embodiment, the first adhesive film layer 141 and the second adhesive film layer 142 provide certain damping performance, and can play a role in reducing weight, and the first metal layer 131 and the second metal layer 132 provide strength; meanwhile, the rib 112 is combined, so that the strength of the vibrating plate 100 is effectively enhanced, and the vibrating plate 100 is easy to form, so that the vibrating plate 100 has good heat resistance, constant damp-heat resistance and excellent water resistance. Compared with the existing aluminum foil structure, the damping performance is better, and the FR high frequency is more gentle, as shown in figure 6. Alternatively, the rib 112 is provided at a middle position of the vibration plate 100.
In the present embodiment, the size of the first layer 11 and the second layer 12 of the body 1 in the vibration plate 100 may be the same. Of course, in other embodiments, the size of the first layer 11 and the second layer 12 may be different, and is not limited herein.
In an embodiment, the material of the first metal layer 131 and/or the second metal layer 132 is any one of an aluminum foil, a copper foil, a titanium foil, a magnesium alloy foil, and an MMC (metal matrix composite), and the aluminum foil is an H-state aluminum foil.
In this embodiment, the material of the first metal layer 131 may be any one of an aluminum foil, a copper foil, a titanium foil, a magnesium alloy foil, and an MMC. The material of the second metal layer 132 may be any one of aluminum foil, copper foil, titanium foil, magnesium alloy foil and MMC. It is understood that the materials of the first metal layer 131 and the second metal layer 132 may be the same or different, and are not limited herein.
Optionally, when the material of the first metal layer 131 and/or the second metal layer 132 is an aluminum foil, the aluminum foil is an H-type aluminum foil, such as 8011H type, 5052H type, and the like, which is not limited herein. As can be appreciated, aluminum foil has better ductility and densification.
In one embodiment, the modulus density ratio of first metal layer 131 and/or second metal layer 132 is > 15GPa cm 3 (iv) g. It can be understood that the body 1 of the vibrating plate 100 is composed of a plurality of metal layers (e.g., the first metal layer 131 and the second metal layer 132) and adhesive film layers (e.g., the first adhesive film layer 141 and the second adhesive film layer 142), so that after the plurality of metal layers and the adhesive film layers are compounded into a tightly adhered multi-layer structure through a compounding process, the modulus density ratio of the vibrating plate 100 is ensured to be greater than 15GPa · cm 3 And/g, thereby effectively securing the sensitivity of the diaphragm 100 and improving the frequency response characteristic of high frequencies. Alternatively, the modulus density of the first metal layer 131 and/or the second metal layer 132 may be 20GPa · cm 3 /g、30GPa·cm 3 And/g, etc.
In an embodiment, the first adhesive film layer 141 and/or the second adhesive film layer 142 is made of at least one of an epoxy adhesive film, a phenolic adhesive film, an acrylate adhesive film, a silicone adhesive film, and a polyester adhesive film.
In this embodiment, the material of the first adhesive film layer 141 can be any one of an epoxy adhesive film, a phenolic adhesive film, an acrylate adhesive film, a silicone adhesive film, and a polyester adhesive film. The material of the second adhesive film layer 142 is any one of an epoxy adhesive film, a phenolic adhesive film, an acrylate adhesive film, a silicone adhesive film, and a polyester adhesive film, which is not limited herein. It is understood that the materials of the first adhesive film layer 141 and the second adhesive film layer 142 may be the same material or different materials, and are not limited herein.
Optionally, the tensile modulus of the first adhesive film layer 141 and/or the second adhesive film layer 142 is > 600Mpa. In this embodiment, the tensile modulus of the first adhesive film layer 141 is greater than 600Mpa, and the tensile modulus of the second adhesive film layer 142 is greater than 600Mpa. It can be understood that the rigidity and the high frequency performance of the vibration plate 100 are ensured by defining the modulus requirement of the first/second adhesive film layers 141/142 to be greater than or equal to 600Mpa. The higher the modulus of the first adhesive film layer 141/the second adhesive film layer 142 is, the better the rigidity of the entire composite vibration plate 100 is, and the relatively better the high-frequency performance is. Further, the tensile modulus of the first adhesive film layer 141 and/or the second adhesive film layer 142 may be 800Mpa, 1000Mpa, or the like.
In one embodiment, the adhesive strength of the first adhesive film layer 141 and/or the second adhesive film layer 142 is greater than 300gf/20mm. It can be understood that the quality of the adhesive force determines the bending strength of the composite structure, the higher the adhesive force is, the better the coordination consistency of the upper and lower metal layers of the first metal layer 131 and/or the second metal layer 132 connected between the first adhesive film layer 141 and the second adhesive film layer 142 in the vibration process is, the pure tone quality is, the initial state can be maintained after long-time vibration, and the performance stability is excellent. Meanwhile, when the adhesive force of the adhesive film layer is low, the state of molding the ribs 112 on the vibration plate 100 is likely to cause delamination, or delamination at the time of high-frequency vibration. Alternatively, the adhesive force of the first and/or second adhesive film layers 141 and 142 may be 500gf/20mm.
In one embodiment, the thickness of the first layer 11 and/or the second layer 12 ranges from 0.004mm to 0.21mm.
Alternatively, the thickness of the first layer 11 is 0.004mm, 0.006mm, 0.008mm, 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.2mm, 0.21mm, etc., which is not limited herein. The thickness of the second layer 12 ranges from 0.004mm to 0.21mm, alternatively, the thickness of the second layer 12 is 0.004mm, 0.006mm, 0.008mm, 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.15mm, 0.2mm, 0.21mm, etc., without limitation.
It is understood that the thickness of the first layer 11 is the sum of the thicknesses of the first metal layer 131 and the first adhesive film layer 141, and the thickness of the second layer 12 is the sum of the thicknesses of the second metal layer 132 and the second adhesive film layer 142. It can be understood that the thickness of the first layer 11/the second layer 12 ranges from 0.004mm to 0.21mm, so that the structure of the vibrating plate 100 is lighter and thinner, which is beneficial to being widely applied to the current thinner electronic devices and can ensure the acoustic performance of the speaker.
In this embodiment, since the first layer 11 is formed with the ribs 112, optionally, the thickness of the first layer 11 is greater than the thickness of the second layer 12. Alternatively, where the ratio of the height of the ribs 112 to the thickness of the first layer 11 is > 0.05, the thickness of the first layer 11 should preferably be > 12 μm. If the ratio of the height of the rib 112 to the thickness of the first layer 11 is too large, the aluminum foil (first metal layer 131) of the first layer 11 is excessively stretched, and cracks are likely to occur in the transition region of the rib 112.
It can be understood that the aramid fiber has excellent high damping characteristics, and the first layer 11/the second layer 12 are formed by compounding the fiber material and the prepreg resin, and the rib 112 structure is formed at a part of the first layer 11, so that the structural rigidity of the vibrating plate 100 is effectively enhanced, the high-frequency cut-off frequency of the SPK is increased, and the FR curve is relatively gentle, as shown in fig. 6. Alternatively, the aramid fiber may be selected as para-aramid fiber.
Optionally, the fiber material is one of aramid fiber, carbon fiber or glass fiber, and the prepreg resin is any one of epoxy resin, phenolic resin, bismaleimide resin, vinyl resin, PA (polyamide), PP (polypropylene), PC (polycarbonate), PI (polyimide) and PEEK (polyether ether ketone). It is understood that the materials of the first layer 11 and the second layer 12 may be the same or different, and are not limited herein.
In this embodiment, the first layer 11/the second layer 12 are formed by combining fiber material and prepreg resin, and the fiber material can be made into unidirectional cloth or woven cloth, and then soaked in prepreg resin. It will be appreciated that when unidirectional fibre prepregs are used, the fibres of the first and second layers 11, 12 are orientated in the same direction or are arranged crosswise. When the first layer 11 and the second layer 12 are arranged in a crossed manner, the first layer and the second layer are required to be symmetrical, the layering sequence can be [ 0 °/90 °/foam/90 °/0 °, or [ 90 °/0 °/foam/0 °/90 ° ], and can also be [ 45 °/foam/± 45 ° ], which is not limited herein. When the woven cloth is adopted, two layers of the first layer 11 and the second layer 12 are required to be symmetrically laid, and the first layer 11 provided with the convex ribs 112 is preferably in a twill or satin weaving form in the woven cloth, and is not limited herein. Alternatively, the modulus of the fibrous material is > 200GPa.
In one embodiment, when the first layer 11 and/or the second layer 12 are unidirectional fabrics, the areal density of the first layer 11 and/or the second layer 12 is in the range of 15g/m 2 ～150g/m 2 . It will be appreciated that when the first layer 11 and/or the second layer 12 are made of a unidirectional fabric made of a fibrous material and then impregnated with a prepreg resin, the areal density of the first layer 11 and/or the second layer 12 is in the range of 15g/m 2 ～150g/m 2 。
It will be appreciated that the areal density of the first layer 11 is in the range of 15g/m 2 ～150g/m 2 . Optionally, the areal density of the first layer 11 is in the range of 15g/m 2 、20g/m 2 、25g/m 2 、30g/m 2 、35g/m 2 、40g/m 2 、45g/m 2 、50g/m 2 、55g/m 2 、60g/m 2 、65g/m 2 、70g/m 2 、75g/m 2 、80g/m 2 、85g/m 2 、90g/m 2 、95g/m 2 、100g/m 2 、120g/m 2 、130g/m 2 、140g/m 2 、150g/m 2 Etc., without limitation thereto.
The second layer 12 has an areal density in the range of 15g/m 2 ～150g/m 2 . Optionally, the second layer 12 has an areal density in the range of 15g/m 2 、20g/m 2 、25g/m 2 、30g/m 2 、35g/m 2 、40g/m 2 、45g/m 2 、50g/m 2 、55g/m 2 、60g/m 2 、65g/m 2 、70g/m 2 、75g/m 2 、80g/m 2 、85g/m 2 、90g/m 2 、95g/m 2 、100g/m 2 、120g/m 2 、130g/m 2 、140g/m 2 、150g/m 2 Etc., without limitation.
It will be appreciated that by limiting the areal density of the first layer 11/second layer 12 to a range of 15g/m 2 ～150g/m 2 Thereby securing rigidity and high frequency performance of the vibration plate 100.
In another embodiment, when the first layer 11 and/or the second layer 12 are woven fabrics, the areal density of the first layer 11 and/or the second layer 12 is in the range of 25g/m 2 ～240g/m 2 (ii) a It will be appreciated that when the first layer 11 and/or the second layer 12 are formed by weaving a woven fabric of fibrous material and then impregnated with a prepreg resin, the areal density of the first layer 11 and/or the second layer 12 is in the range of 25g/m 2 ～240g/m 2 。
It will be appreciated that the areal density of the first layer 11 is in the range 25g/m 2 ～240g/m 2 . Optionally, the areal density of the first layer 11 is in the range of 25g/m 2 、30g/m 2 、35g/m 2 、40g/m 2 、45g/m 2 、50g/m 2 、55g/m 2 、60g/m 2 、65g/m 2 、70g/m 2 、75g/m 2 、80g/m 2 、85g/m 2 、90g/m 2 、95g/m 2 、100g/m 2 、120g/m 2 、130g/m 2 、140g/m 2 、150g/m 2 、160g/m 2 、170g/m 2 、180g/m 2 、190g/m 2 、200g/m 2 、210g/m 2 、220g/m 2 、230g/m 2 、240g/m 2 Etc., without limitation.
The second layer 12 has an areal density in the range of 25g/m 2 ～240g/m 2 . Alternatively, the second layer 12 has an areal density in the range of 25g/m 2 、30g/m 2 、35g/m 2 、40g/m 2 、45g/m 2 、50g/m 2 、55g/m 2 、60g/m 2 、65g/m 2 、70g/m 2 、75g/m 2 、80g/m 2 、85g/m 2 、90g/m 2 、95g/m 2 、100g/m 2 、120g/m 2 、130g/m 2 、140g/m 2 、150g/m 2 、160g/m 2 、170g/m 2 、180g/m 2 、190g/m 2 、200g/m 2 、210g/m 2 、220g/m 2 、230g/m 2 、240g/m 2 Etc., without limitation.
It will be appreciated that by limiting the areal density of the first layer 11/second layer 12 to 25g/m 2 ～240g/m 2 Thereby securing rigidity and high frequency performance of the vibration plate 100.
In one embodiment, the tensile modulus of the prepreg resin is > 500MPa and the flexural strength of the prepreg resin is > 60MPa. It can be understood that the rigidity and high frequency performance of the vibration plate 100 are ensured by defining the tensile modulus of the prepreg resin to be > 500 Mpa. By limiting the bending strength of the prepreg resin to > 60MPa, the rigidity and high-frequency performance of the vibration plate 100 are further ensured. Alternatively, the tensile modulus of the prepreg resin may be 3Gpa. Alternatively, the bending strength of the prepreg resin may be 100Mpa.
In one embodiment, the prepreg resin content in the first layer 11 and/or the second layer 12 is 30% to 60%. It is understood that when the fiber material is a unidirectional fabric, the content of the prepreg resin in the first layer 11/the second layer 12 can be selected to be 40% to 60%, which can ensure the compactness of the first layer 11/the second layer 12. When the fiber material is woven cloth, the content of the prepreg resin in the first layer 11/the second layer 12 can be selected to be 30% -48% due to the good compactness of the fiber material, and is not limited herein.
In one embodiment, the material of the filler layer 2 is one of liquid foam or foam plastic film.
In this embodiment, the filler layer 2 may be a foam filler, and the foam filler may be injected with liquid foam or may be applied in a form of a foam adhesive film. Of course, in some alternative embodiments, the foam padding may also be selected from foaming resins, and may be self-foaming in the mold cavity, and is not limited herein.
In an embodiment, the material of the filler layer 2 is one of foamed PET (polyethylene terephthalate), PMI (polymethacrylimide), PA (polyamide), PVC (polyvinyl chloride), PE (polyethylene), PPS (polyphenylene sulfide), PS (polystyrene), PU (polyurethane), epoxy foam or phenolic foam, which is not limited herein.
In one embodiment, as shown in fig. 1, the body 1 of the vibration plate 100 is provided with a rib 112. In other embodiments, as shown in fig. 2 and 3, the rib 112 includes a plurality of ribs, so that the structural strength of the vibration plate 100 can be effectively reinforced while reducing the overall weight of the vibration plate 100.
In one embodiment, as shown in fig. 2, the plurality of ribs 112 are arranged in parallel and spaced along the length direction or the width direction of the main body 1. In another embodiment, as shown in fig. 3, the ribs 112 are arranged in a cross manner and form an included angle, and the included angle ranges from 0 ° to 90 °.
It can be understood that the number, shape or arrangement manner of the ribs 112 are not limited, and the height and size of the ribs 112 are determined according to the product design, so that the distance between the convex surface of the outer shape of the ribs 112 and the bottom of the washer is usually set to be +0.12mm (when the amplitude is less than or equal to 0.6) or 0.15mm (when the amplitude is greater than 0.6) of the maximum amplitude, which is not limited herein.
As shown in fig. 7, the present invention further provides a processing method of the vibration plate 100, which includes the following steps:
providing a body 1, the body 1 comprising a first layer 11 and a second layer 12;
laying the first layer 11 on a lower die 710, and performing pre-pressing forming by using a first upper die 720 to form a recessed area 113 recessed towards one side of the first layer 11;
filling the filler layer 2 in the recessed area 113;
laying the second layer 12 on the first layer 11, and covering the opening of the depressed area 113, so that the depressed area 113 and the second layer 12 enclose to form a sealed cavity 1a;
the second upper mold 730 is used to close the mold, and the temperature is raised and heated to foam the filler layer 2 in the sealed cavity 1a, and the vibration plate 100 is obtained by demolding.
In this embodiment, before the main body 1 is processed, the first layer 11 and the second layer 12 of the main body 1 are separate structures, that is, the first layer 11 and the second layer 12 are respectively a separate plate-shaped structure or a separate sheet-shaped structure, which is not limited herein. It is understood that the first layer 11 and the second layer 12 may be made of a metal layer and a film layer, for example, the first layer 11 is made of a first metal layer 131 and a first film layer 141, which are stacked, and the second layer 12 is made of a second metal layer 132 and a second film layer 142, which are stacked.
It will be appreciated that the first layer 11 and the second layer 12 may be the same size. Of course, in other embodiments, the size of the first layer 11 and the second layer 12 may be different, and is not limited herein. Optionally, the material of the first metal layer 131/the second metal layer 132 is one of an aluminum foil, a copper foil, a titanium foil, or a magnesium alloy foil, and the aluminum foil is an H-state aluminum foil, which is not limited herein. The material of the first adhesive film layer 141/the second adhesive film layer 142 is at least one of an epoxy adhesive film, a phenolic adhesive film, an acrylate adhesive film, and a silicone adhesive film, which is not limited herein.
Of course, in other embodiments, the first layer 11/the second layer 12 is formed by compounding a fiber material and a prepreg resin, the fiber material is one of aramid fiber, carbon fiber or glass fiber, and the prepreg resin is at least one of epoxy resin, phenolic resin, bismaleimide resin, vinyl resin, PA (polyamide), PP (polypropylene), PC (polycarbonate), PI (polyimide) and PEEK (polyether ether ketone), which is not limited herein.
In this embodiment, the first layer 11 is laid on the lower mold 710 and is pre-pressed by the first upper mold 720, so that one side of the first layer 11 forms a concave area 113 depressed to the other side. It will be appreciated that the lower mold 710 is formed with a groove structure having a size and configuration opposite to the recessed area 113. I.e. the plate-shaped first layer 11, covers the groove structure when laid on the lower mould 710. The first mould 720 of going up is provided with protruding structure corresponding to the groove structure of lower mould 710, and the shape structure of this protruding structure and groove structure's shape structure phase-match, so make when first mould 720 of going up push down to first layer 11, the protruding structure of first mould 720 of going up can be with the partial pre-compaction shaping that first layer 11 corresponds groove structure in groove structure to make one side of first layer 11 form towards the sunken depressed area 113 of opposite side, this depressed area 113 shows as bellied protruding muscle 112 at the opposite side.
It is understood that after the pre-press forming, the first upper mold 720 is removed, and then the filler layer 2 is filled into the recessed area 113. Then, the second layer 12 is laid on the first layer 11, the opening of the recessed area 113 is closed, the recessed area 113 and the second layer 12 enclose a sealed chamber 1a, and then the second upper mold 730 is used to close the chamber, thereby press-bonding the second layer 12 to the first layer 11. The lower mold 710 is heated to foam the filler layer 2 in the sealed cavity 1a, and after the heating is completed, the vibration plate 100 is obtained by demolding.
In one embodiment, the step of filling the filler layer 2 in the recessed region 113 includes: the filler layer 2 is filled in the recessed region 113 so that the volume ratio of the filler layer 2 to the recessed region 113 is in the range of 3/4 to 1/25.
It can be understood that, when the filler layer 2 is filled in the recessed area 113, the ratio of the volume of the filled filler layer 2 to the volume of the recessed area 113 is controlled to be 1/25 to 3/4, so that the filler layer 2 in the sealed cavity 1a is foamed to fill the sealed cavity 1a when being heated, thereby effectively reducing the weight of the vibrating plate 100. Optionally, the volume ratio of filler layer 2 to recessed region 113 ranges from 1/25 to 1/2.
In this example, the density of the material in the first layer 11/second layer 12 is 1g/cm 3 ～1.5g/cm 3 The density of the material in the first layer 11/second layer 12 after foaming with heating is preferably 0.04g/cm 3 ～0.75g/cm 3 And are not limited thereto. It will be appreciated that the first layer 11 and the second layer 12 are formed by thermoforming.
As shown in fig. 8, the present invention further provides a speaker structure 600, the speaker structure 600 includes a frame 300, and a magnetic circuit system 400 and a vibration system 500 accommodated in the frame 300, and the vibration system 500 includes the vibration plate 100. The specific structure of the diaphragm 100 refers to the foregoing embodiments, and since the speaker structure 600 adopts all technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.
In this embodiment, the frame 300 is used to mount, fix and protect the magnetic circuit system 400, the vibration system 500 and other components of the speaker structure 600, and the frame 300 may have a structure such as a housing, a box body, a mounting case, a mounting bracket, etc. of the cavity 310, which is not limited herein. It is understood that when the frame 300 is a metal member, the magnetic circuit system 400 is fixed to the frame 300 by adhesion. In another embodiment, when the frame 300 is injection molded by plastic, the magnetic conducting plates of the magnetic circuit 400 are first injection molded as inserts in the frame 300, and then the other parts are bonded and fixed.
It will be appreciated that by providing the cavity 310 in the frame 300 and the magnetic circuit system 400 in the cavity 310, the vibration system 500 is disposed opposite to the magnetic circuit system 400 and connected to the frame 300, thereby forming a main body portion of the speaker structure 600.
In an embodiment, as shown in fig. 8, the vibration system 500 further includes a diaphragm 510 and a voice coil 520, wherein the diaphragm 510 is disposed opposite to the magnetic circuit 400, the vibration plate 100 is disposed on the diaphragm 510, the magnetic circuit 400 is disposed with a magnetic gap 401 and a recess 423, and the recess 423 is disposed corresponding to the rib 112 of the vibration plate 100; one end of the voice coil 520 is connected to the diaphragm 510 or the vibration plate 100, and the other end of the voice coil 520 is suspended in the magnetic gap 401.
In this embodiment, when the voice coil 520 is conducted with an external circuit, the voice coil 520 transmits electrical energy to the magnetic gap 401 of the magnetic circuit system 400, and under the action of magnetic lines generated by the magnetic gap 401, the voice coil 520, the diaphragm 510 and the vibration plate 100 move up and down, that is, the magnetic field generated by the magnetic circuit system 400 is utilized to convert the electrical energy into mechanical energy, so that the voice coil 520 vibrates, and drives the diaphragm 510 and the vibration plate 100 of the vibration system 500 to vibrate and generate sound, and further convert the mechanical energy into sound energy. That is, after the voice coil 520 disposed in the magnetic gap 401 receives an externally varying alternating current signal, the voice coil reciprocates to cut the magnetic lines of force under the driving of the magnetic field force of the magnetic circuit system 400, so as to drive the diaphragm 510 of the vibration system 500 to vibrate and generate sound.
It can be understood that, by providing the concave portion 423 on the magnetic circuit system 400, the concave portion 423 is disposed corresponding to the rib 112 of the vibration plate 100, so that the rib 112 fits with the avoiding space (i.e., the concave portion 423) provided by the magnetic circuit system 400 for the rib 112, which not only saves the vibration space, but also improves the FR high frequency.
Optionally, the cross-sectional shape and size of the ribs 112 are adapted to the cross-sectional shape and size of the recesses 423.
It can be understood that the vibration plate 100 cannot exert its high frequency advantage if it is a flat plate structure, and the top structure 31 is provided with the convex rib 112 and the magnetic circuit system 400 is provided with an avoiding structure, so that the displacement between the convex rib 112 and the bottom of the magnetic circuit system 400 is usually set to be +0.12mm (when the amplitude is less than or equal to 0.6) or 0.15mm (when the amplitude is greater than 0.6) at the maximum amplitude, thereby ensuring the acoustic performance of the speaker structure 600.
In this embodiment, the speaker structure 600 using the vibrating plate 100 can improve the sensitivity after the middle frequency and the high frequency are 8K, expand the high frequency, make the FR curve smoother, and make the musical instrument play richer. When the loudspeaker structure 600 using the vibrating plate 100 plays a high-frequency signal, harmonic components can be reduced, THD (total harmonic distortion) can be effectively improved, and subjective auditory sensation is clearer.
In one embodiment, the height of the rib 112 is defined as h, and the diameter of the rib 112 is defined as d. It is understood that the height h of the rib 112 is the distance between the rib 112 and the first surface 111, i.e. the maximum distance between the vertex of the rib 112 and the first surface 111. The diameter d of the rib 112 is the opening distance in the width direction of the recessed region 113 on the side of the first layer 11 facing the second layer 12.
It can be understood that when the first layer 11 and/or the second layer 12 of the vibrating plate 100 is formed by compounding aramid fibers and prepreg resin, and h/d is greater than 0.1, the plurality of ribs 112 are arranged in parallel; when h/d is less than 0.1, the plurality of ribs 112 are arranged in a crossed manner. In the present embodiment, the ribs 112 may be disposed at the edge of the main body 1, where the structure allows, so that a plurality of ribs 112 form a frame structure at the edge of the main body 1, or a plurality of ribs 112 intersect at the middle of the main body 1 to form a node. Alternatively, the plurality of ribs 112 may be arranged in a single array or a cross pattern parallel to the short axis direction, which is not limited herein. When the ribs 112 are arranged crosswise, the crossing angle range of the ribs 112 is 0-90 degrees.
In this embodiment, when h/d is greater than 0.1 and the washer avoiding size width of the speaker structure 100 is less than 5mm, the form of washer bottom opening (depth guarantee) is maintained as much as possible, and the height of the reinforcing rib is increased. When h/d is less than 0.1, nodes are arranged to form the net-shaped convex ribs 112, the rigidity of the main body 1 is enhanced, the washer avoiding size needs to be increased, and the depth can be smaller or not limited.
Optionally, the diaphragm 510 is made of one or more of engineering plastics (such as peek, par, etc.), elastomer materials (such as tpu, tpee, silicone rubber, etc.), and adhesive films (such as acrylate adhesives, silicone adhesives, etc.). The thickness of the diaphragm 510 is in the range of 0.01mm to 0.5 mm.
In one embodiment, as shown in fig. 8, the diaphragm 510 includes an inner ring portion 511, a ring-folded portion 512 disposed around the inner ring portion 511, and a fixing portion 513 disposed at an outer periphery of the ring-folded portion 512, the fixing portion 513 is connected to the frame 300, a periphery of the diaphragm 100 is connected to the inner ring portion 511, and a voice coil 520 is connected to a side of the diaphragm 100 opposite to the inner ring portion 511 and disposed around the rib 112.
In this embodiment, the diaphragm 510 includes an inner ring portion 511, a ring-folded portion 512 disposed around the inner ring portion 511, and a fixing portion 513 disposed on an outer periphery of the ring-folded portion 512, and the inner ring portion 511, the ring-folded portion 512, and the fixing portion 513 of the diaphragm 510 may be formed integrally. The diaphragm 510 is connected to the frame 300 through a fixing portion 513, and the diaphragm 510 is connected to the vibration plate 100 through an inner ring portion 511. Alternatively, the inner ring portion 511 of the diaphragm 510 and the diaphragm 100 are bonded by glue or adhesive tape.
It is understood that the inner ring portion 511 of the diaphragm 510 is surrounded by an opening, and the diaphragm 100 is disposed corresponding to the opening surrounded by the inner ring portion 511, in which case the inner ring portion 511 has an upper side and a lower side disposed oppositely, and the periphery of the diaphragm 100 is connected to the upper side or the lower side of the inner ring portion 511, so that the central portion of the diaphragm 510 is reinforced by the diaphragm 100. Optionally, the inner ring portion 511 is a hollow structure.
In another embodiment, the inner ring portion 511 may be a flat plate structure integrally connected, such that the inner ring portion 511 has an upper side and a lower side oppositely disposed, in which case the vibration plate 100 is connected to the upper side or the lower side of the inner ring portion 511, thereby reinforcing the central portion of the diaphragm 510 by the vibration plate 100.
In this embodiment, the bending ring portion 512 is disposed in a convex or concave manner, and the fixing portion 513 is formed by extending the outer side edge of the bending ring portion 512. The fixing portion 513 may be connected to the frame 300 by bonding, welding, or the like, but is not limited thereto.
It is understood that, in order to increase the effective vibration area of the diaphragm 510, the fixing portion 513 may also be formed by extending the outer side edge of the corrugated portion 512 downward, that is, the fixing portion 513 is connected to the outer wall of the frame 300 by adhesion or the like.
In one embodiment, as shown in fig. 8, the magnetic circuit system 400 includes a magnetic yoke 410, a central magnetic circuit portion 420 and a side magnetic circuit portion 430, wherein the magnetic yoke 410 is disposed in the basin stand 300; the central magnetic circuit part 420 is arranged on the magnetic yoke 410, and a concave part 423 is arranged on one side of the central magnetic circuit part 420, which faces away from the magnetic yoke 410; the side magnetic path portion 430 is provided in the yoke 410 and surrounds the central magnetic path portion 420, and a magnetic gap 401 is formed between the side magnetic path portion 430 and the central magnetic path portion 420.
In the present embodiment, the magnetic yoke 410 is fixed to the frame 300, the central magnetic circuit portion 420 and the side magnetic circuit portion 430 are disposed on a side of the magnetic yoke 410 facing the vibration system 500, and the side magnetic circuit portion 430 is disposed around the central magnetic circuit portion 420 and forms a magnetic gap 401 with the central magnetic circuit portion 420, so that the voice coil 520 of the vibration system 500 is suspended in the magnetic gap 401, that is, between the central magnetic circuit portion 420 and the side magnetic circuit portion 430. It can be understood that by providing the magnetic side circuit portion 430, that is, the magnetic side circuit portion 430 without breaking the design is larger in volume, the magnetic field strength is higher, and thus the acoustic performance of the speaker structure 600 is improved.
In an embodiment, as shown in fig. 8, the central magnetic circuit portion 420 includes a central magnet 421 and a central washer 422, the central magnet 421 is disposed on the magnetic yoke 410, the central washer 422 is disposed on a side of the central magnet 421 facing away from the magnetic yoke 410, the central washer 422 is provided with a recess 423, and the recess 423 is a groove structure or a through groove structure. The side magnetic circuit portion 430 includes a side magnet 431 and a side washer 432, the side magnet 431 is disposed on the yoke 410 and surrounds the central magnetic circuit portion 420, and the side washer 432 is disposed on a side of the side magnet 431 opposite to the yoke 410. Alternatively, the recess 423 may be provided at a central position of the center magnet 421.
In the present embodiment, the central magnet 421 and the central washer 422 have the same structural contour, and the central magnet 421 and the central washer 422 may be selected to have a plate-shaped structure. The edge magnet 431 and the edge washer 432 have the same structural contour, and the edge magnet 431 and the edge washer 432 may be selected from a ring structure or a plurality of strip structures, which are not limited herein.
It will be appreciated that the bezel 432 may be secured to the yoke 410 in opposing abutment with the bezel magnet 431. Of course, in other embodiments, the washer 432 may also be disposed on the frame 300, such that the washer 432 and the frame 300 are disposed as an integral structure, thereby simplifying the processing process of the speaker structure 600. In this embodiment, the basin stand 300 and the side washer 432 are made of metal materials, so as to improve the heat conduction and dissipation effects.
The invention also provides an electronic device, which comprises a device shell and a loudspeaker structure 600, wherein the loudspeaker structure 600 is arranged in the device shell. The specific structure of the speaker structure 600 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.
In this embodiment, a cavity is disposed in the housing, and the speaker structure 600 is disposed in the cavity. It is understood that the electronic device may be an electronic device, such as a mobile phone, a sound box, a computer, a headset, a watch, a television, or a tablet computer, and is not limited herein.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (16)
1. A diaphragm for use in a loudspeaker structure, the diaphragm comprising:
the main body is provided with a first surface and a second surface which are separated from each other, the main body comprises a first layer and a second layer which are arranged in a stacked mode, one side of the first layer, back to the second layer, is the first surface, one side of the second layer, back to the first layer, is the second surface, convex ribs which protrude towards the direction far away from the second layer are arranged on the first layer, the convex ribs are convex hull structures formed on the first surface, sealing cavities are formed in the convex ribs, and the second surface is a plane; and
the packing layer is filled into the sealing cavity;
the material of the packing layer is one of liquid foam or a foaming adhesive film; or the material of the filler layer is one of foaming PET, PMI, PA, PVC, PE, PPS, PS, PU, epoxy foam or phenolic foam.
2. A diaphragm according to claim 1, wherein a side of the first layer facing the second layer is recessed toward a side facing away from the second layer to form a recessed area and to enclose the sealed cavity with the second layer.
3. A vibration plate according to claim 2, wherein the first layer includes a first metal layer and a first adhesive film layer which are laminated, and the depression area is formed by depression of the first adhesive film layer toward the first metal layer;
the second layer includes second metal level and the second glued membrane layer of range upon range of setting, the second glued membrane layer with first glued membrane layer bonding connection.
4. A vibration plate according to claim 3, wherein a material of said first metal layer and/or said second metal layer is any one of an aluminum foil, a copper foil, a titanium foil, a magnesium alloy foil, and an MMC;
and/or the modulus density ratio of the first metal layer and/or the second metal layer is more than 15GPa cm 3 /g；
And/or the first adhesive film layer and/or the second adhesive film layer is/are made of any one of an epoxy adhesive film, a phenolic adhesive film, an acrylate adhesive film, a silica gel adhesive film and a polyester adhesive film;
and/or the tensile modulus of the first adhesive film layer and/or the second adhesive film layer is larger than 600Mpa;
and/or the adhesive force of the first adhesive film layer and/or the second adhesive film layer is larger than 300gf/20mm;
and/or the thickness of the first layer and/or the second layer ranges from 0.004mm to 0.21mm.
5. A vibration plate as claimed in claim 2, wherein said first layer and/or said second layer is compounded of a fiber material which is one of aramid fiber, carbon fiber or glass fiber, and a prepreg resin which is any one of epoxy resin, phenol resin, bismaleimide resin, vinyl resin, PA, PP, PC, PI and PEEK.
6. A vibration plate according to claim 5, wherein when said first layer and/or said second layer is a unidirectional cloth, an area density of said first layer and/or said second layer is in a range of 15g/m 2 ～150g/m 2 (ii) a Or when the first layer and/or the second layer is woven cloth, the surface density range of the first layer and/or the second layer is 25g/m 2 ～240g/m 2 ；
And/or the tensile modulus of the prepreg resin is more than 500MPa, and the bending strength of the prepreg resin is more than 60MPa;
and/or the resin content of the prepreg resin in the first layer and/or the second layer is 30-60%.
7. A vibrating plate according to any one of claims 1 to 6, wherein the rib comprises a plurality of;
the plurality of convex ribs are arranged in parallel and are arranged at intervals along the length direction or the width direction of the main body; or the plurality of convex ribs are arranged in a crossed manner and form included angles, and the included angles range from 0 degree to 90 degrees.
8. A processing method of a vibration plate according to any of claims 1 to 7, characterized by comprising the steps of:
providing a body having a first surface and a second surface facing away from each other, the body comprising a first layer and a second layer, the first surface being on a side of the first layer facing away from the second layer, and the second surface being on a side of the second layer facing away from the first layer;
laying the first layer on a lower die, and performing pre-pressing forming by using a first upper die to form a concave area which is concave towards the other side on one side of the first layer so as to form a convex rib which corresponds to the concave area on the first layer, wherein the convex rib is a convex hull structure formed on the first surface;
filling a packing layer in the concave area, wherein the packing layer is made of one of liquid foam or foaming adhesive film; or the material of the filler layer is one of foaming PET, PMI, PA, PVC, PE, PPS, PS, PU, epoxy foam or phenolic foam;
laying the second layer on the first layer, and covering the opening of the depressed area to form a sealed cavity surrounded by the depressed area and the second layer, wherein the second surface is a plane;
and (3) closing the die by using a second upper die, heating to foam and form the filler layer in the sealed cavity, and demolding to obtain the vibrating plate.
9. The method of manufacturing a vibration plate according to claim 8, wherein the step of filling the filler layer in the depression area comprises:
and filling the filler layer in the depressed area, so that the volume ratio of the filler layer to the depressed area is 1/25-3/4.
10. A speaker structure characterized by comprising a frame, and a magnetic circuit system and a vibration system housed in the frame, the vibration system comprising a vibration plate according to any one of claims 1 to 7.
11. The loudspeaker structure of claim 10, characterized in that the vibration system further comprises:
the vibrating diaphragm is arranged opposite to the magnetic circuit system, the vibrating plate is arranged on the vibrating diaphragm, the magnetic circuit system is provided with a magnetic gap and a concave part, and the concave part is arranged corresponding to the convex rib of the vibrating plate; and
and one end of the voice coil is connected with the vibrating diaphragm or the vibrating plate, and the other end of the voice coil is suspended in the magnetic gap.
12. The loudspeaker structure of claim 11, wherein the diaphragm is connected at its periphery to the diaphragm, and the voice coil is connected to a side of the diaphragm facing away from the diaphragm and disposed around the rib.
13. The speaker structure as claimed in claim 11, wherein the cross-sectional shape and size of the rib is adapted to the cross-sectional shape and size of the recess;
and/or the vibrating diaphragm is formed by compounding one or more materials of engineering plastics, elastomer materials and adhesive films;
and/or the thickness of the diaphragm is within the range of 0.01 mm-0.5 mm.
14. The loudspeaker structure of claim 11, wherein the magnetic circuit system comprises:
the magnetic conduction yoke is arranged in the basin frame;
the central magnetic circuit part is arranged on the magnetic guide yoke, and the side of the central magnetic circuit part, which is back to the magnetic guide yoke, is provided with the concave part; and
and the side magnetic circuit part is arranged on the magnetic conduction yoke and surrounds the central magnetic circuit part, and the magnetic gap is formed between the side magnetic circuit part and the central magnetic circuit part.
15. The loudspeaker structure of claim 14, wherein the central magnetic circuit portion comprises a central magnet and a central washer, the central magnet is disposed on the yoke, the central washer is disposed on a side of the central magnet facing away from the yoke, the central washer is provided with the recess, and the recess is a groove structure or a through-groove structure.
16. An electronic device comprising a device housing and a speaker arrangement according to any of claims 10-15, the speaker arrangement being provided within the device housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158673.XA CN112954550B (en) | 2021-02-08 | 2021-02-08 | Diaphragm and processing method thereof, loudspeaker structure and electronic equipment |
| PCT/CN2021/136062 WO2022166367A1 (en) | 2021-02-08 | 2021-12-07 | Vibration plate, processing method therefor, loudspeaker structure and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158673.XA CN112954550B (en) | 2021-02-08 | 2021-02-08 | Diaphragm and processing method thereof, loudspeaker structure and electronic equipment |
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| CN112954550A CN112954550A (en) | 2021-06-11 |
| CN112954550B true CN112954550B (en) | 2023-01-24 |
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| CN202110158673.XA Active CN112954550B (en) | 2021-02-08 | 2021-02-08 | Diaphragm and processing method thereof, loudspeaker structure and electronic equipment |
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| CN (1) | CN112954550B (en) |
| WO (1) | WO2022166367A1 (en) |
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| CN112954550B (en) * | 2021-02-08 | 2023-01-24 | 歌尔股份有限公司 | Diaphragm and processing method thereof, loudspeaker structure and electronic equipment |
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| Publication number | Publication date |
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| WO2022166367A1 (en) | 2022-08-11 |
| CN112954550A (en) | 2021-06-11 |
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