Classifications

• • 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
  • H04R7/16—Mounting or tensioning of diaphragms or cones
  • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
  • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
• • 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
• • 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
  • H04R2231/003—Manufacturing aspects of the outer suspension of loudspeaker or microphone diaphragms or of their connecting aspects to said diaphragms
• • 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
  • H04R2307/204—Material aspects of the outer suspension of loudspeaker diaphragms
• • 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
  • H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms

Definitions

• the present invention relates to an electrodynamic loudspeaker comprising a frame, an assembly movable relative to the frame in translation along an axis of the loudspeaker around an occupied equilibrium position when the loudspeaker is at rest, the assembly having at least one membrane configured to emit sound waves, and at least one suspension seal of the assembly, the seal forming a loop around the assembly, and comprising: a first end attached to the assembly, a second end fixed on the frame, and a main part connecting the first end and the second end and providing an axial flexibility of the seal.
• the invention also relates to an acoustic enclosure incorporating such a loudspeaker, and a motor vehicle comprising at least one such acoustic enclosure.
• the invention finally relates to a method of installing at least one suspension joint in such a loudspeaker.
• the loudspeaker results from the assembly of a plurality of parts and its sound qualities can be influenced positively or negatively by the quality of the assembly.
• An object of the invention is therefore to provide a loudspeaker of the type described above, whose sound quality is little or not influenced by assembly operations, including the suspension joint and facilitate assembly.
• the subject of the invention is a loudspeaker of the type described above, in which the first end or the second end comprises a portion distal to the main part, and a proximal part, the distal part being more compressible radially than the proximal portion, and being compressed radially between the proximal portion and a stop of the assembly or frame.
• the loudspeaker comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
• the distal portion has a distal compressibility coefficient
• the proximal portion has a proximal compressibility coefficient
• the distal compressibility coefficient is at least twice, preferably ten times, or even a hundred times, greater than the coefficient of proximal compressibility
• the seal has a cradle cross section in the equilibrium position
• the distal portion and the proximal portion are made of different materials
• the distal portion comprises a lip, the lip projecting radially from the proximal portion inwards and flexing against said stop;
• the distal portion has a thickness distal along the axis
• the proximal portion has a proximal thickness along the axis
• the proximal thickness is strictly greater than the distal thickness
• the invention also relates to an acoustic enclosure comprising at least one loudspeaker as described above.
• the invention finally relates to a method of installing at least one seal in an electrodynamic loudspeaker, the speaker comprising, at least once mounted, a frame, a movable assembly relative to the frame in translation according to an axis of the loudspeaker around an occupied equilibrium position when the loudspeaker is at rest, the assembly comprising at least one membrane configured to emit sound waves, the method comprising the following steps:
• the seal comprising a first end located radially on the assembly side, a second end located radially on the side of the frame, and a main part connecting the first end; end and the second end and configured to provide axial flexibility of the seal, the first end and / or the second end comprising a portion proximal to the main portion, and a distal portion more radially compressible than the proximal portion;
• the method comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
• the distal portion is mechanically secured to the proximal portion and remains in the loudspeaker after the fixing step;
• the distal portion is mechanically distinct from the proximal portion, or linked to the proximal portion by a frangible connection, the method further comprising a withdrawal of the distal portion after the attachment of the first end and / or the second end, once the centering achieved, the distal portion removed is not intended to remain in the speaker.
• FIG. 1 is a sectional view of an acoustic enclosure according to the invention
• FIG. 2 is a detail of FIG. 1 centered on two suspension joints of a loudspeaker of the acoustic enclosure represented in FIG. 1;
• FIG. 3 is a detail of FIG. 2 centered on one end of one of the suspension joints shown in FIGS. 1 and 2,
• FIGS. 4 to 6 are respectively views, similar to FIG. 3, of suspension joints constituting variants of the gasket shown in FIGS. 1 to 3, and
• FIG. 7 is a detailed view of a variant of one of the joints shown in FIG.
• the acoustic enclosure 1 is for example adapted to be integrated into the passenger compartment (not shown) of a motor vehicle (not shown).
• the loudspeaker 1 comprises a box 3, a loudspeaker 5 according to the invention, and advantageously other speakers 7, 9, 1 1.
• the casing 3 has for example a generally spherical shape, with the exception, in the example shown, of a substantially planar face 13 surrounding the loudspeaker 11.
• the speaker 7 is structurally analogous to the speaker 5 and will not be described in detail.
• the speaker 7 is advantageously mounted head to tail with the speaker 5 along an axis D of the latter.
• the speaker 7 is for example a subwoofer, that is to say, configured to transmit in a bandwidth extending for example from 15 Hz to about 500 Hz.
• the loudspeaker 9 is for example a loudspeaker of medium and treble, that is to say configured for example to transmit in a bandwidth extending for example from 200 Hz to 25 kHz.
• the loudspeaker 9 has a protective grid 15 advantageously located in the continuity of the box 3.
• the speaker 9 is configured to transmit directly into an interior volume (not shown) of the passenger compartment of the motor vehicle.
• the speaker 1 1 is for example also configured to emit in the medium and treble, but in one or conduits (not shown) defined by the passenger compartment of the motor vehicle.
• the loudspeaker 5 comprises a frame 17, a magnetic circuit 19 defining at least one gap 21, a set 23 movable relative to the frame in translation along the axis D of the loudspeaker around an equilibrium position occupied when the loudspeaker is at rest, and two joints 25, 27 for suspending the assembly.
• the frame 17 is quite small.
• the frame 17 is mechanically secured to the casing 3.
• the assembly 23 comprises a membrane 29 configured to emit sound waves, a coil holder 31 fixed on the membrane, a coil 33 fixed on the coil carrier and located in the gap 21, and a connecting member 35 also fixed on the membrane.
• the membrane 29 is for example convex, the convexity being advantageously turned towards the outside of the loudspeaker 5.
• the membrane 29 is for example spherical, with the exception of a peripheral edge 39.
• the peripheral edge 39 is located vis-à-vis an edge 41 of the box 3 defining an opening across which the membrane 29 extends.
• the reel holder 31 and the connecting member 35 have for example a substantially cylindrical shape of axis D.
• the seals 25, 27 are structurally similar, so only the seam 25 will be described in detail below.
• the seal 25 forms an elastic loop around the assembly 23.
• the seal 25 comprises a first end 39A fixed to the assembly 23, a second end 41 A fixed to the frame 17, and a main portion 43 connecting the first end and the second end and providing an axial flexibility of the seal.
• the seal 25 defines a gutter 45 advantageously located under the edges 39, 41 of the membrane 29 and the box 3.
• the seal 25 has a cradle cross section in the equilibrium position.
• the first end 39A and the second end 41A form respectively respectively substantially radially oriented flanges and facilitating the attachment of the gasket 25.
• the second end 41 A is advantageously bonded to the frame 17, for example by a lower face 47 directed towards the inside of the loudspeaker 5.
• first end 39A and the second end 41A are for example located axially substantially at the same level.
• the first end 39A is for example glued to a ring 49 mechanically secured to the connecting member 35.
• the first end 39A includes a distal portion 51 relative to the main portion 43, and a proximal portion 53 ( Figure 3).
• the distal portion 51 is radially closer to the axis D than the proximal portion 53.
• the first end 39A is for example glued on an inner face 54 of the ring 49.
• the distal portion 51 is more radially compressible than the proximal portion 53, and is compressed radially between the distal portion and an abutment 55 of the ring 49.
• radially compressed is meant here that the distal portion 51 receives a pressure in the radial direction from both the proximal portion 53 and the stopper 55.
• the distal portion 51 has a distal compressibility coefficient.
• the proximal portion 53 has a coefficient of proximal compressibility.
• the distal compressibility coefficient is advantageously at least twice, preferably ten times or even a hundred times greater than the greater than the coefficient of proximal compressibility.
• compression coefficient or “compressibility” is meant conventionally the magnitude - (1 / L). (DL / dF), where:
• L represents the extension (in meters) in the radial direction of the part of the joint considered
• F represents a force radially applied to the part considered per unit length of the joint considered (in N / m), and
• dL / dF is the derivative of L with respect to F.
• the distal portion 51 contracts more easily than the proximal portion 53 in the radial direction.
• the distal portion 51 is formed by a lip 57 protruding radially inwardly from the proximal portion 53.
• the lip 57 is bent against the face 55 and deflected for example towards the inside of the loudspeaker 5.
• the main part 43 of the gasket 27 is not turned towards the inside of the loudspeaker
• the first end 39A of the seal 25 is coated with glue.
• the seal 25 is then arranged around the assembly 23 so as to form a loop around the axis D.
• the bonded portion of the first end 39A is placed against the lower face 54 of the ring 49.
• the lip 57 is placed in flexion against the radially outer face 55 of the ring 49.
• the distal portion 51 of the first end 39A is compressed radially against the face 55, because the loop formed by the seal 25 is disposed around the assembly 23.
• the greater compressibility of the distal portion 51 of the first end 39A of the seal 25 allows centering of the seal relative to the assembly 23 and prevents the first end 39A is stretched in the direction of its length about the axis D .
• the greater compressibility of the distal portion 51 also makes it possible to compensate for the fact that the diameter of the first end about the axis D is a little too large or a little too small because of the manufacturing tolerances of the seal 25.
• the proximal portion 53 is fixed on the assembly 23 by gluing.
• the second end 41 A ( Figure 2) is also bonded to the frame 17.
• the seal 25 is then in place and perfectly centered.
• the seals 25, 27 are put in place more easily and their centering is easier, which reduces the risks of a bad placement of the seals or a tension of the first end 39A in the meaning of its length.
• seal 125 constituting a first variant of the seal 25 shown in FIGS. 2 and 3 is described.
• the variants advantageously also apply to the seal 27.
• the seal 125 is similar to the seal 25. Similar elements will not be described again. Only the differences will be described in detail below.
• the distal portion 51 has a distal thickness E1 along the axis D.
• the proximal portion 53 has a proximal thickness E2.
• the proximal thickness E2 is strictly greater than the distal thickness E1.
• distal portion 51 has a compressibility in the radial direction greater than the compressibility of the proximal portion 53.
• the proximal thickness E2 is 3 times, preferably 10 times, greater than the distal thickness E1.
• the gasket 125 is installed in the same manner as the gasket 25.
• seal 225 constituting a second variant of the seal 25 shown in Figures 2 and 3.
• the seal 225 is similar to the seal 25. The similar elements will not be described again. Only the differences will be described in detail below.
• the first end 39A includes a distal portion 251 separate from the proximal portion 53.
• the seal 225 is in two pieces.
• the distal portion 251 is adapted to be removed once the seal 225 has been in place and the centering relative to the assembly 23 has been performed.
• the proximal portion 53 is coated with glue and placed against the ring 49. Once the centering is performed, the distal portion 251 is removed, which does not remain in the speaker 5.
• seal 325 constituting an alternative of the seal 225 shown in Figure 5.
• the seal 325 is similar to the seal 225.
• the distal portion 51 of the first end 39A does not constitute an element distinct from the proximal portion 53, but is connected to the proximal portion 53 by a frangible link 354.
• the distal portion 51 is separated from the proximal portion 53 and removed from the speaker 5.
• the proximal portion of the first end 39A is for example made of a material different from that of the distal portion.
• the proximal portion is made of SB (styrene-butadiene) of hardness 60 Shore A
• the distal portion is made of alveolar EPDM (ethylene-propylene-diene monomer).
• the second end 41 A also comprises a distal portion 51, and a proximal portion 53 less compressible radially than the distal portion.
• this is obtained thanks to a lip 357 similar to the lip 57 shown in FIG.
• the distal portion 51 of the second end 41 A is radially further from the axis D than the proximal portion 53.
• the difference in compressibility is obtained in different ways as explained above for the first end 39A.
• the greatest radial compressibility of the distal portion of the first end 39A and / or the second end 41A is ensured respectively by a lip, a lower axial thickness, and / or a material different, these different possibilities possibly being combined.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Manufacturing & Machinery (AREA)
• Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
• Diaphragms For Electromechanical Transducers (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=60080885

Family Applications (1)

Country Status (4)

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Family Cites Families (4)

• 2017
  • 2017-05-30 FR FR1754732A patent/FR3067202B1/fr active Active
• 2018
  • 2018-05-30 CN CN201880037744.7A patent/CN110741656B/zh active Active
  • 2018-05-30 WO PCT/EP2018/064273 patent/WO2018220061A1/fr active Application Filing
  • 2018-05-30 EP EP18726191.2A patent/EP3632136B1/de active Active

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