WO2022160686A1 - Croisillon élastique, dispositif électronique et terminal - Google Patents

Croisillon élastique, dispositif électronique et terminal Download PDF

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Publication number
WO2022160686A1
WO2022160686A1 PCT/CN2021/114319 CN2021114319W WO2022160686A1 WO 2022160686 A1 WO2022160686 A1 WO 2022160686A1 CN 2021114319 W CN2021114319 W CN 2021114319W WO 2022160686 A1 WO2022160686 A1 WO 2022160686A1
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WO
WIPO (PCT)
Prior art keywords
elastic
elastic support
cross
linear structure
support piece
Prior art date
Application number
PCT/CN2021/114319
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English (en)
Chinese (zh)
Inventor
徐同雁
强寿松
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歌尔股份有限公司
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Publication of WO2022160686A1 publication Critical patent/WO2022160686A1/fr

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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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/041—Centering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the present invention relates to the field of electro-acoustic technology, in particular to an elastic support piece, an electronic device and a terminal.
  • Electronic devices such as speakers, are important acoustic components in electronic equipment, which are transducers that convert electrical signals into acoustic signals.
  • electronic equipment which are transducers that convert electrical signals into acoustic signals.
  • the structural design of traditional loudspeakers is also constantly seeking innovation and changes. It not only needs to meet the development trend of thinning, but also pay more and more attention to the optimization of performance and the simplification of the process. and cost control.
  • the plane spring wound by a circular or square wire in cross-section has the same length and width of the cross-section, and its radial direction mechanical stiffness Kms is smaller than the radial direction mechanical stiffness Kms of the ordinary centering support piece, As a result, the vibration unit in the loudspeaker has the defects of poor hearing and poor acoustic performance test when the low-frequency large-displacement vibration occurs.
  • the main purpose of the present invention is to provide an elastic support piece, an electronic device and a terminal, aiming at solving the defects of poor hearing and poor acoustic index performance test caused by the flat spring in the prior art when the vibration unit in the loudspeaker vibrates at low frequency and large displacement. The problem.
  • the present invention proposes an elastic support piece, the elastic support piece includes two installation parts and an elastic part connected between the two installation parts, and the elastic part is formed by bending a linear Structural composition, the linear structure is straight and/or curved, and the two mounting parts are respectively connected to different components;
  • the cross section of the linear structure is a closed loop structure formed by a straight line and/or a curve
  • the length of the cross section of the linear structure is a, and the width of the cross section of the linear structure is b, wherein 1 ⁇ a/b ⁇ 10.
  • the elastic portion is a planar structure, and the elastic portion and the two mounting portions are located in the same horizontal plane; the elastic support piece is wound from the linear structure.
  • the length direction of the cross section of the linear structure is consistent with the direction of the plane where the elastic portion is located, and the width direction of the cross section of the linear structure is a direction perpendicular to the plane where the elastic portion is located.
  • the cross-section of the linear structure is oval or rectangular.
  • the cross-section of the linear structure is in the shape of a racetrack or a rectangle-like shape.
  • the length direction of the cross section of the linear structure is horizontal, and the width direction of the cross section of the linear structure is vertical;
  • the cross-section of the linear structure includes two oppositely arranged transverse straight lines, the two transverse straight lines are vertically spaced apart, and the corresponding ends of the two transverse lines are connected by a smooth transition through an arc, to enclose said cross-section in the shape of a racetrack; or,
  • the cross section of the linear structure includes two oppositely arranged horizontal straight lines and two oppositely arranged vertical straight lines, the two horizontal straight lines are vertically spaced apart, and the two vertical straight lines are respectively arranged on the horizontal straight lines.
  • the ends of the vertical straight lines and the corresponding horizontal straight lines are smoothly connected by an arc to enclose the rectangular-like cross section.
  • the arc is a circular arc with an inner concave surface facing the central area of the cross-section of the linear structure.
  • the elastic support piece is made of any one of phosphor bronze, iron, steel or alloy materials.
  • the elastic portion includes a first end connected to one of the two mounting portions, and a second end connected to the other of the two mounting portions;
  • the elastic portion is formed by extending from the first end to the second end in a straight line and/or a curve along the same direction or different directions.
  • one end of each of the mounting parts away from the elastic part is connected to a static or reciprocating component vibrating in the first direction;
  • At least one of the installation parts is provided with a buffer part, and at least part of the buffer part is bent from the end of the installation part away from the elastic part toward the first direction, and the buffer part is between the installation part and the buffer part. Smooth transition connections.
  • the elastic portion is a planar structure arranged along a second direction, and the first direction and the second direction are perpendicular to each other.
  • the present invention also provides an electronic device, the electronic device includes a bracket, a vibration unit and any one of the elastic support pieces described above, the elastic support pieces are used to balance the vibration of the vibration unit in a preset direction;
  • the The vibrating unit includes a vibrating membrane and a voice coil connected to the vibrating membrane; the two mounting parts are respectively connected to the voice coil and the bracket correspondingly;
  • the bracket is a shell or a magnetic yoke.
  • the present invention also provides a terminal, where the terminal includes the above-mentioned electronic device.
  • the length-width ratio of the cross-section of the linear structure in the elastic support piece is set within an appropriate range, and the length dimension of the cross-section of the linear structure is larger than the width dimension, so that the radial direction of the elastic support piece is
  • the directional mechanical stiffness Kms is significantly increased, even when the vibration unit in the speaker vibrates at low frequency and large displacement, it still ensures a good listening effect of the speaker, and ensures that the acoustic index performance is well tested, and it can also ensure the length and width of the cross-section of the linear structure.
  • the ratio should not be too large to prevent the elastic support from breaking due to the over-flattening of the linear structure.
  • FIG. 1 is a three-dimensional schematic diagram of an electronic device according to an embodiment of the present invention.
  • FIG. 2 is a schematic perspective view of an elastic support piece and a voice coil according to an embodiment of the present invention
  • FIG. 3 is a schematic front view of an elastic support piece and a voice coil according to an embodiment of the present invention
  • FIG. 4 is a schematic cross-sectional view of a linear structure in an elastic support piece according to an embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view of a linear structure in an elastic support piece according to another embodiment of the present invention.
  • FIG. 6 is a schematic cross-sectional view of a linear structure in an elastic support piece according to another embodiment of the present invention.
  • FIG. 7 is a schematic cross-sectional view of a linear structure in an elastic support piece according to yet another embodiment of the present invention.
  • FIG. 8 is a schematic perspective view of an elastic support piece according to an embodiment of the present invention.
  • FIG. 9 is a three-dimensional schematic diagram of an elastic support piece according to another embodiment of the present invention.
  • FIG. 10 is a schematic top view of the electronic device of the present invention.
  • label name label name 10 elastic support 15 buffer structure 11 linear structure 20
  • Vibration unit 111 Horizontal line twenty one voice coil 112 vertical line 211 skeleton 113 arc 212 voice coil wire 12 Installation Department 30 bracket 13 elastic part 40 pad 14 buffer 50 elastic group
  • the present invention provides an elastic support piece.
  • the elastic support piece of this embodiment includes two mounting portions 12 and an elastic portion 13 connected between the two mounting portions 12 , and the elastic portion 13 is composed of a bent linear structure 11 .
  • the linear structure 11 is a straight line and/or a curve, and the two mounting parts 12 are respectively connected to different components;
  • the cross section of the linear structure 11 is a closed loop structure formed by a straight line and/or a curve;
  • the length of the cross section is a, and the width of the cross section of the elastic support piece is b, where 1 ⁇ a/b ⁇ 10.
  • the elastic support piece 10 of this embodiment is applied to electronic devices such as a sound-generating device, a motor or a multi-function vibration device, and this embodiment is described by taking the elastic support piece 10 applied to a sound-generating device as an example.
  • the electronic device includes an elastic support piece 10 and a vibration unit 20.
  • the elastic support piece 10 is used to balance the vibration of the vibration unit 20 along a first direction.
  • the first direction in this embodiment is the up-down direction shown in FIG. 3 to FIG.
  • the support piece 10 is used to balance the vibration of the vibration unit 20 in the up-down direction.
  • the electronic device further includes a bracket 30.
  • the vibration unit 20 includes a diaphragm and a voice coil 21 connected to the diaphragm; the two mounting parts 12 of the elastic support 10 are respectively connected to the voice coil 21 and the bracket 30 correspondingly, And/or, the bracket 30 is a housing or a magnetic yoke.
  • the vibration unit 20 can vibrate in the up-down direction in the casing of the electronic device, wherein the up-down direction is based on the directions shown in FIG. 3 to FIG. 9 , and the vibration direction of the vibration unit 20 is It is represented by a vertical direction or an up-down direction, and a direction perpendicular to the vibration of the vibration unit 20 is represented by a horizontal direction.
  • a mounting portion 12 of the elastic support piece 10 is connected to the voice coil 21.
  • the voice coil 21 includes a skeleton 211 and a wire 212 of the voice coil 21 wound around the skeleton 211.
  • the skeleton 211 is connected, and can also be connected with the wire 212 of the voice coil 21 .
  • the other mounting portion 12 of the elastic support piece 10 is connected to the housing, so as to realize the assembly between the voice coil 21 , the elastic support piece 10 and the housing.
  • one mounting portion 12 of the elastic support piece 10 is connected to the voice coil 21
  • the other mounting portion 12 is connected to the magnetic yoke.
  • the vibrating unit 20 includes a vibrating membrane and a voice coil 21 connected to the vibrating membrane.
  • the voice coil 21 is usually wound by a metal wire.
  • the vibration direction of the voice coil 21 is represented by the vertical direction or the up and down direction, and the vibration direction perpendicular to the voice coil 21 is represented by the left and right direction or the horizontal direction; Therefore, when the voice coil 21 vibrates up and down according to the electrical signal, it will also drive the diaphragm to vibrate and generate sound waves.
  • the position of the voice coil 21 will also change during the vibration of the voice coil 21, and the magnetic field lines located on the upper side of the magnetic gap of the electronic device are arc-shaped lines. Therefore, the voice coil 21
  • the ampere force received is not only in the vertical direction, but also includes the ampere force in other directions, which causes the voice coil 21 to be easily polarized in a non-vertical direction during the vibration process, which further affects the vibration of the diaphragm.
  • the elastic support 10 connecting the voice coil 21 and the bracket 30 can be provided to center the polarization of the voice coil 21, that is, to ensure that the voice coil 21 vibrates along the vibration direction within the magnetic gap of the electronic device .
  • the elastic support piece 10 is a flat spring.
  • the bracket 30 is a shell or a magnetic yoke. Since the shell can be used to carry the sounding device monomer, setting the bracket 30 as a shell can facilitate the fixing of the side of the elastic support piece 10 away from the vibration unit 20, The centering and supporting effect of the elastic support piece 10 is improved. Since most of the vibration unit 20 is close to the magnetic gap of the electronic device, and the distance between it and the magnetic yoke is relatively short, connecting the side of the elastic support piece 10 away from the vibration unit 20 to the magnetic yoke can save the elastic support piece 10 on the one hand. The distance is set, and it is convenient to improve the centering and supporting effect of the elastic support piece 10 .
  • the fixing method of the elastic support piece 10 in this embodiment includes various combinations: the two mounting parts 12 of the elastic support piece 10 are respectively connected to the voice coil 21 and the housing, or, the elastic support piece 10 The two mounting parts 12 are respectively connected to the voice coil 21 and the magnetic yoke, which can better ensure the centering and supporting effect of the elastic support piece 10 .
  • the elastic support piece 10 of this embodiment includes two mounting portions 12 and an elastic portion 13 connected between the two mounting portions 12 .
  • the elastic portion 13 is formed by a bent linear structure 11 , and the linear structure 11 is a straight line. and/or curve, specifically, the elastic support piece 10 may be a linear structure 11 formed by winding a single-strand metal wire, or may be a linear structure 11 formed by winding a double-strand metal wire, or the like.
  • the shape of the elastic portion 13 can be a polygonal helical structure formed by bending and extending the linear structure 11, and can specifically be a quadrilateral, pentagon, hexagon, etc., or a circular or elliptical structure, or a straight line and a hexagonal shape.
  • each bending of the elastic portion 13 is a bending line segment, part of the bending line segment is a straight line, and the other part is a curve, which can be a shape in which a curve and a straight line are alternately connected, which needs to be explained.
  • the alternation here is not limited to one-to-one alternation, and can also be one-to-many, multiple-to-many alternation.
  • the arrangement of the elastic support piece 10 in this embodiment forms a horizontal constraint on the vibration unit 20 when the vibration unit 20 vibrates vertically, which can prevent the vibration unit 20 from being polarized, and the elastic support piece 10 follows the vibration unit 20 in the vertical direction. up displacement.
  • the elastic portion 13 in the elastic support piece 10 of the present embodiment is formed by a bent linear structure 11, and the linear structure 11 is straight and/or curved.
  • the elastic support piece 10 in this embodiment is formed by bending and extending as a whole in a linear structure 11 , which is simple and convenient to manufacture, simplifies the manufacturing process, has high manufacturing efficiency, and reduces the manufacturing cost.
  • the elastic support sheet 10 in this embodiment does not increase the height of the electronic device in the vertical direction, occupies less space, and is beneficial to the thinning of the product.
  • the cross section of the linear structure 11 in this embodiment is a closed loop structure formed by a straight line and/or a curve
  • the length of the cross section of the linear structure 11 is a
  • the width of the cross section of the linear structure 11 is b
  • the elastic support piece in this embodiment is formed by winding a flat wire, or can be a linear structure 11 with an aspect ratio of 1, that is, a circular or square cross-section, such as a wire wound. After manufacturing, the wire is then flattened into a non-circular and non-square flat structure with inconsistent length and width.
  • the length a of the cross section of the linear structure 11 is inconsistent with the width b, and 1 ⁇ a/b ⁇ 10, which can make the aspect ratio of the cross section of the linear structure 11 in an appropriate range , and the length dimension of the cross section of the linear structure 11 is larger than the width dimension, so that the mechanical stiffness Kms in the radial direction of the elastic support plate is significantly increased, even when the vibration unit 20 in the speaker vibrates at a large displacement at a low frequency, the speaker is still guaranteed to be good It also ensures that the acoustic index performance test is good, and the aspect ratio of the cross-section of the linear structure 11 is not too large, so as to prevent the elastic support piece from being broken due to the over-flattening of the linear structure 11 .
  • the elastic portion 13 is a planar structure, and the elastic portion 13 and the two mounting portions 12 are located in the same horizontal plane.
  • the elastic portion 13 in this embodiment has a horizontally arranged planar structure, and the elastic portion 13 and the two mounting portions 12 are located on the same horizontal plane, that is, the elastic portion 13 and the two mounting portions 12 are both arranged in a horizontally arranged planar structure.
  • this embodiment improves the overall flatness of the elastic support, reduces the height of the electronic device along the vertical direction, and realizes the design concept of thinning the product.
  • the length direction of the cross section of the linear structure 11 is consistent with the direction of the plane where the elastic portion 13 is located, and the width direction of the cross section of the linear structure 11 is the direction perpendicular to the plane where the elastic portion 13 is located.
  • the direction of the plane where the elastic portion 13 is located is the left-right direction, and the direction perpendicular to the plane where the elastic portion 13 is located is the up-down direction.
  • the length direction of the cross-section of the linear structure 11 is the left-right direction
  • the width direction of the cross-section of the linear structure 11 is the up-down direction
  • the length of the cross-section of the linear structure 11 is greater than the width of the cross-section of the linear structure 11, And 1 ⁇ a/b ⁇ 10, so that the cross section of the linear structure 11 is flat, so that the entire elastic support piece is a flat plane spring, the mechanical stiffness Kms in the radial direction of the elastic support piece is increased, and the structure design is reasonable .
  • the length a and the width b of the cross section of the linear structure 11 are in an appropriate range, wherein 0.1mm ⁇ a ⁇ 1mm, 0.2mm ⁇ b ⁇ 3mm, which effectively increases the mechanical stiffness of the elastic support sheet in the radial direction Kms, and can ensure that the elastic support is not easy to break.
  • the linear structure 11 in this embodiment needs to be thicker than the voice coil 21 , and the size of the cross section of the linear structure 11 needs to be larger than the size of the cross section of the voice coil 21 of the voice coil 21 , which increases the elasticity The fatigue strength of the support piece ensures that the elastic support piece is not easy to break.
  • the cross-section of the linear structure 11 is elliptical, the short axis of the ellipse is arranged vertically, and the long axis of the ellipse is arranged horizontally, which not only increases the cross-section of the linear structure 11
  • the radial dimension of the elastic support piece, and when making the elastic support piece, it can be wound with a linear structure 11 with a circular cross-section, and then flattened by a mold to an oval cross-section of the linear structure 11, which is convenient to manufacture.
  • the elliptical cross section is not easy to form stress concentration, which increases the fatigue strength of the elastic support.
  • the cross-section of the linear structure 11 is rectangular, the short side of the rectangle is arranged vertically, and the long side of the rectangle is arranged horizontally, which not only increases the diameter of the cross-section of the linear structure 11 .
  • the size of the elastic support can be directly wound from a flat wire, which is used for material acquisition and production.
  • the cross-section of the linear structure 11 is in the shape of a racetrack.
  • the length direction of the cross section of the linear structure 11 is horizontal
  • the width direction of the cross section of the linear structure 11 is vertical
  • the width direction of the cross section of the structure 11 is the vertical direction.
  • the cross section of the linear structure 11 includes two horizontal straight lines 111 arranged opposite to each other, the two horizontal straight lines 111 are vertically spaced apart, and the corresponding ends of the two horizontal straight lines 111 are connected by an arc 113 in a smooth transition to form a smooth transition.
  • the arc line 113 is the circular arc line 113 with the inner concave surface facing the central area of the cross section of the linear structure 11 .
  • the two horizontal straight lines 111 are arranged at intervals up and down, and the left ends of the two horizontal straight lines 111 are smoothly connected by a semicircular arc 113 , and the ends of the two horizontal straight lines 111 also pass through the semicircular arc 113 Smooth transition connections enclose a racetrack-shaped cross-section.
  • the length dimension of the racetrack-shaped cross-section is larger than the width dimension, which not only increases the radial dimension of the cross-section of the linear structure 11, but also can be used first when making the elastic support piece.
  • the cross-section of the linear structure 11 is flattened by a mold to be a racetrack shape, which is convenient to manufacture, and the racetrack-shaped cross-section is not easy to form stress concentration, which increases the fatigue strength of the elastic support.
  • the cross-section of the linear structure 11 is quasi-rectangular. Specifically, the length direction of the cross section of the linear structure 11 is horizontal, and the width direction of the cross section of the linear structure 11 is vertical. The width direction of the cross section of the structure 11 is the vertical direction.
  • the cross section of the linear structure 11 includes two oppositely arranged horizontal straight lines 111 and two oppositely arranged vertical straight lines 112 . The ends of the vertical straight lines 112 and the corresponding horizontal straight lines 111 are smoothly connected by an arc 113 to enclose a rectangular-like cross section.
  • the arc 113 is a circular arc with the inner concave surface facing the central area of the cross section of the linear structure 11 .
  • two horizontal straight lines 111 are arranged at intervals up and down, one of the vertical straight lines 112 is arranged at the left end of the horizontal straight line 111 , and the upper and lower ends of the vertical straight line 112 pass through an arc line and two The left end of the horizontal straight line is smoothly connected, and another vertical straight line 112 is arranged on the right end of the horizontal straight line 111, and the upper and lower ends of the vertical straight line 112 are smoothed by an arc line and the right ends of the two horizontal straight lines. Transition connections, enclosing a rectangular-like cross-section.
  • the length dimension of the racetrack-shaped cross-section is larger than the width dimension, which not only increases the radial dimension of the cross-section of the linear structure 11, but also can be used first when making the elastic support piece.
  • the cross-section of the linear structure 11 is flattened by a mold to be a racetrack shape, which is convenient to manufacture, and the rectangular-like cross-section is not easy to form stress concentration, which increases the fatigue strength of the elastic support.
  • the elastic support piece of the present invention is made of any one of phosphor bronze, iron, steel or alloy materials, which is not easily affected by environmental changes, is not easily deformed in a high temperature and high humidity environment, and does not change in hardness. Good, so that the electronic device can work in harsh environments, optimize product performance, and improve the wide application of the electronic device.
  • the elastic portion 13 includes a first end connected to one of the two mounting portions 12 , and a second end connected to the other of the two mounting portions 12 ; the elastic portion 13 is formed by the first The end is formed by extending to the second end in a straight line and/or a curve along the same direction or in different directions. A central area is provided between the first end and the second end.
  • the elastic support piece 10 is formed by bending and extending a narrow and long linear structure 11 as a whole, wherein the elastic part 13 can be in the form of a spiral.
  • the structure is formed by spirally extending from the first end to the central area in a clockwise direction to the central area, and then extending counterclockwise from the central area to the second end.
  • the elastic portion 13 can also be in a square helix-like structure, and is formed by extending from the first end to the central region along a straight line and a curve respectively to the central region, and then extending from the central region to the second end along a curve and a straight line respectively.
  • the elastic portion 13 can also be other structures formed by bending and extending the narrow and long linear structure 11.
  • the structural shape of the elastic portion 13 can be set according to actual use requirements.
  • the elastic support sheet 10 of the present invention does not limit the structure of the elastic portion 13. .
  • the elastic support 10 of the present embodiment is formed by bending and extending a narrow and long linear structure 11 as a whole, which can reduce the stress concentration of the elastic support 10 , the fatigue strength is increased, the risk of fracture of the elastic support piece 10 is reduced, and the compliance of the elastic support piece 10 is maintained well, and the vibration of the vibration unit 20 is not affected.
  • each mounting portion 12 away from the elastic portion 13 is connected to a component that is static or vibrating reciprocally in the first direction; at least one mounting portion 12 is provided with a buffer portion 14 , which is at least partially constructed from the mounting portion 12 .
  • One end away from the elastic portion 13 is bent in the first direction, and the mounting portion 12 and the buffer portion 14 are connected in a smooth transition.
  • a mounting portion 12 of the elastic support piece 10 is connected to the voice coil 21 .
  • the voice coil 21 includes a frame 211 and a wire 212 of the voice coil 21 wound around the frame 211 .
  • the mounting portion 12 can be connected to the skeleton 211, and can also be connected to the wire 212 of the voice coil 21.
  • the other mounting portion 12 of the elastic support piece 10 is connected to the housing, so as to realize the assembly between the voice coil 21 , the elastic support piece 10 and the housing.
  • one mounting portion 12 of the elastic support piece 10 is connected to the voice coil 21
  • the other mounting portion 12 is connected to the magnetic yoke.
  • the elastic support piece 10 of the present embodiment at least one mounting portion 12 is provided with a buffer portion 14 , and at least part of the structure of the buffer portion 14 is bent toward the first direction from the end of the mounting portion 12 away from the elastic portion 13 .
  • the buffer portion 14 of the elastic support piece 10 can be in contact with the voice coil 21 or the pad 40 of the bracket 30, and the solder paste can be applied.
  • the laser welding melts the solder paste to fix the elastic support 10 and the pad 40 to realize the assembly of the elastic support 10 and the voice coil 21 or the bracket 30 .
  • the bending direction of at least part of the structure of the buffer part 14 is consistent with the vibration direction of the vibration unit 20 , that is, at least part of the structure of the buffer part 14 is bent in the vertical direction, so that the buffer part 14 is bent in the vertical direction.
  • At least part of the structure is not affected by the vertical vibration of the vibration unit 20, so this part of the structure will not be pulled by the rotational force, has good fatigue resistance, and is less likely to break and fall off the solder joint between the elastic support 10 and the pad 40.
  • the effectiveness of the assembly between the elastic support piece 10 and the voice coil 21 or the bracket 30 is ensured, and the reliability is high.
  • the smooth transition connection between the mounting portion 12 and the buffer portion 14 can reduce stress concentration and ensure that the elastic support piece 10 will not break.
  • the two mounting portions 12 of the elastic support piece 10 are provided with buffer portions 14 , the structures of the two buffer portions 14 are the same, and the bending directions of the two buffer portions 14 are in the same direction or the reverse setting.
  • one of the mounting parts 12 is provided with a buffer part 14 , and the buffer part 14 can be connected to the pad 40 of the voice coil 21 .
  • the other mounting part 12 can also be provided with a buffer structure 15 connected to the pads 40 of the bracket 30 similar in structure to the buffer part 14 , but the buffer structure 15 is at the same level as the elastic part 14 and folded toward or away from the elastic part 13 .
  • the buffer structure 15 is bent toward the elastic part 13, which not only increases the contact area between the buffer structure 15 and the pad 40 of the bracket 30, but also can restrain the elastic support piece 10 from rotating when the vibration unit 20 vibrates.
  • the elastic support 10 and the pad 40 of the bracket 30 are not prone to breakage and fall off, ensuring the effectiveness of the assembly between the elastic support 10 and the bracket 30 and high reliability.
  • the smooth transition connection between the mounting portion 12 and the buffer structure 15 can reduce stress concentration and ensure that the elastic support piece 10 will not break.
  • the elastic portion 13 is a planar structure arranged along the second direction, and the first direction and the second direction are perpendicular to each other.
  • the second direction of this embodiment is the horizontal direction or the left-right direction as shown in FIG. 3 to FIG. 9
  • the elastic portion 13 has a horizontally arranged planar structure, and the elastic portion 13 and the two mounting portions 12 are located on the same horizontal plane, that is, The elastic portion 13 and the two mounting portions 12 are both horizontally arranged planar structures.
  • the present embodiment improves the overall flatness of the elastic support piece 10 and further reduces the electronic device.
  • the height along the vertical direction realizes the design concept of product thinning.
  • the present invention also provides an electronic device, the electronic device includes a bracket 30, a vibration unit 20 and the above-mentioned elastic support piece 10, the elastic support piece 10 is used to balance the vibration of the vibration unit 20 along a preset direction; the vibration unit 20 includes a vibration film and a The voice coil 21 connected to the diaphragm; the two mounting parts 12 are respectively connected to the voice coil 21 and the bracket 3020 correspondingly; and/or the bracket 30 is a shell or a magnetic yoke.
  • the electronic device may be a sounding device, a motor or a multifunctional vibrating device, and the like.
  • the specific structure of the elastic support piece 10 in the electronic device refers to the above-mentioned embodiments. Since the electronic device adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. I won't repeat them one by one.
  • the electronic device of this embodiment there are at least two elastic support pieces 10 , and at least two elastic support pieces 10 are evenly spaced along the outer circumference of the voice coil 21 .
  • the number of the elastic support pieces 10 is three, and the three elastic support pieces 10 are evenly spaced along the outer circumference of the vibration unit 20 to enhance the centering effect of the vibration unit 20.
  • the support piece 10 forms at least three constraints on the voice coil 21 in the horizontal direction, which can prevent the vibration unit 20 from being polarized, and the elastic support piece 10 follows the vibration unit 20 to move in the vertical direction, enhancing the Centering effect on the vibration unit 20 .
  • the number of elastic support pieces 10 may also be four, five, six or other numbers.
  • the number of the elastic support pieces 10 in the electronic device of the present invention can be flexibly adjusted according to the actual situation, and the present invention does not limit the number of the elastic support pieces 10 .
  • the electronic device may include at least one elastic group 50, and one elastic group 50 includes four elastic support pieces 10 located on the same horizontal plane.
  • the line widths or materials of the four elastic support pieces 10 may be the same or different.
  • two of the elastic supports 10 are made of phosphor bronze, the other elastic support 10 is made of beryllium copper, and the other elastic support 10 is made of For 316 steel.
  • the elastic support piece 10 of the conductor structure has the function of conducting electricity, which can transmit electrical signals to the vibration unit 20 of the electronic device.
  • the elastic support piece 10 passes through one of the mounting parts 12 and the voice coil 21 in the vibration unit 20
  • the wiring part of the connecting part is electrically connected and matched, and the other mounting part 12 is connected to the external power supply, and then the voice coil 21 and the external electrical signal are transmitted through the elastic support piece 10;
  • the vibration unit 20 is stabilized in a preset central area, the polarization of the vibration unit 20 is prevented, and the reciprocating vibration of the vibration unit 20 is more stable. Stablize. Therefore, the elastic support piece 10 has both the functions of conduction and centering, and realizes the integration of these two functions.
  • the electronic device may include a plurality of elastic groups 50 , such as two or three elastic groups 50 , the plurality of elastic groups 50 are arranged at intervals along the height direction of the voice coil 21 , and all the elastic support pieces 10 of each elastic group 50 are located in the same horizontal plane.
  • the two elastic groups 50 are arranged at intervals along the vertical direction of the vibration unit 20, and each elastic group 50 group includes four elastic support pieces 10, and the four elastic support pieces 10 are located in the same position.
  • the eight elastic support pieces 10 of the two elastic groups 50 are arranged in a dislocation in the vertical direction, which not only enhances the centering effect of the vibration unit 20, but also has good symmetry and flatness of the mechanical stiffness Kms, which can satisfy the large displacement. Fatigue requirements.
  • the multiple elastic groups 50 enhance the centering effect of the vibration unit 20 on the one hand, and reduce stress concentration on the other hand, which can correspondingly reduce the line width of the elastic support piece 10 , and is easier to manufacture.
  • the number and arrangement of the elastic groups 50, as well as the shape, structure, line width, material and properties of each elastic group 50 can be flexibly set according to actual needs, with good compatibility and wide application range.
  • the present invention also provides a terminal, where the terminal includes the above-mentioned electronic device.
  • the terminal may be a computer, a mobile phone, a sound box, a car sound box applied to a car, and the like.
  • the terminal includes the above-mentioned electronic device, and the specific structure of the electronic device and its elastic support piece 10 refers to the above-mentioned embodiments. Since the terminal adopts all the technical solutions of all the above-mentioned embodiments, it has at least the advantages brought by the technical solutions of the above-mentioned embodiments. All the beneficial effects will not be repeated here.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Vibration Prevention Devices (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

La présente invention concerne un croisillon élastique, un dispositif électronique et un terminal. Le croisillon élastique comprend deux parties de montage et une partie élastique reliée entre les deux parties de montage ; la partie élastique est formée par une structure linéaire pliée ; la structure linéaire est droite et/ou incurvée ; les deux parties de montage sont reliées à différents composants, respectivement ; la section transversale de la structure linéaire est une structure en anneau fermé formée par des lignes droites et/ou des courbes ; la longueur de la section transversale de la structure linéaire est a, et la largeur de la section transversale de la structure linéaire est b, où 1<a/b<10. Dans la présente invention, le rapport d'aspect de la section transversale de la structure linéaire dans l'araignée élastique est réglé dans une plage appropriée, et la longueur de la section transversale de la structure linéaire est supérieure à sa largeur, de sorte que la rigidité mécanique Kms du croisillon élastique dans une direction radiale est significativement augmentée, garantissant ainsi un bon effet d'écoute d'un haut-parleur, garantissant que la performance d'indice acoustique est testée comme étant bonne, et empêchant en outre la rupture de l'araignée élastique qui peut être provoquée par un aplatissement excessif de la structure linéaire.
PCT/CN2021/114319 2021-01-29 2021-08-24 Croisillon élastique, dispositif électronique et terminal WO2022160686A1 (fr)

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