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
  • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
• • 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
  • H04R7/12—Non-planar diaphragms or cones
  • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
• • 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
  • H04R7/12—Non-planar diaphragms or cones
  • H04R7/127—Non-planar diaphragms or cones dome-shaped

Definitions

• the invention relates to a Hembransyst em after
• the invention is applicable to a membrane or a
• loudspeakers of all kinds, e.g.
• Dome heater for pressure chamber systems, for one
• the object of the invention is to provide a membrane system in which the distortions are emitted
• the invention is based on calculations and tests which have shown that good mechanical properties of a membrane can be achieved with the design rule found, with the result that disruptive partial vibrations are largely avoided. About such partial vibrations To contain, a certain course of the bending stiffness and the
• stiffening struts Preferably stiffening struts or
• Trusses are dispensed with and instead a preferred solid shape is chosen, which, however, also includes foamed variants.
• an edge ring can also be provided, which has the membrane at its edge and which in turn is clamped in place so that the membrane is guided in the axial direction
• the fastening zone can also be the zone where the membrane is connected to a cone membrane of a loudspeaker, the membrane covering or bridging over the inner edge or the center of the cone membrane.
• the fastening zone where the membrane is connected to the cone membrane and the drive can be the same
• Figure 1 shows one half of a section along a
• FIG. 2 shows the basic structure of a loudspeaker in section
• Figure 3 represents one half of a section of another
• Figure 1 shows a half of a radial section through a cone membrane M, the inner edge with a
• electromagnetic drive E which acts in the direction of the membrane axis 1.
• the cone membrane is rigid, ring-shaped, rotationally symmetrical and conical.
• the drive is diaphragm and cone diaphragm drive at the same time.
• Edge ring Rr over which is flexible and ring-shaped and has the shape of a bead. (An edge ring with several beads can also be used).
• the edge ring Rr has on its outer edge an annular extension F, which is used to clamp the
• a roationssym metric, rigid membrane P which serves as a dome vibrator and dust protection for the drive E.
• the membrane P driven by the drive E in the form of a voice coil, acts as a piston oscillator.
• Wall thickness h increases in a central ring area around R O / 2 with decreasing values of the radial coordinate r.
• Membrane edge (r R) increasingly steeper. while increasing increasingly steeply in the direction of the membrane axis 1.
• Adhere to distortion e.g. due to membrane deformation
• the wall thickness must therefore be chosen in accordance with previous practice so that at the maximum deflection (which is dependent on the predetermined maximum load capacity of the sound transducer) the membrane does not experience fatigue fractures or inadmissible clinking.
• the membrane preferably consists of homogeneous or foamed material with a smooth surface; if a higher effort and thus a higher price is permitted.
• the loudspeaker shown schematically in section in FIG. 2 also has a permanent magnetic ring magnet 2
• Regulations for the embodiments of the invention with membrane are also applicable to other basic membrane forms, e.g. on domed bell.
• the radial coordinate for the membrane drive E 'does not coincide with the radial coordinate for the edge of the membrane P. However, if one only looks at the membrane P, it is actually directly driven at its edge by the cone membrane M, the cone membrane is therefore a "drive" for the membrane.
• the cone membrane M merges at its outer edge into an edge ring R r , the extension F of which is attached to a loudspeaker basket 5, which in turn is connected to the pole plate 4.
• the statements made in connection with FIG. 1 apply to the edge ring.
• FIG. 3 shows a cross section of another membrane P ′, the course of the wall thickness h again being the same as in FIG. 1.
• the middle is the membrane with a
• Weight loaded consisting of a rod-shaped
• the mass formed by the connecting member G, the body K and partly also by the centering membrane Z is a substitute for the mass which the membrane P does not have in the middle in that the wall thickness h does not approach infinity, as is actually the case the

Landscapes

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

Applications Claiming Priority (4)

Publications (1)

Family

ID=25872731

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (2)

Citations (3)

Family Cites Families (1)

• 1988
  • 1988-11-17 DE DE19883838853 patent/DE3838853C1/de not_active Expired
• 1989
  • 1989-09-28 WO PCT/EP1989/001142 patent/WO1990003709A1/de not_active Ceased
  • 1989-09-28 EP EP19890118011 patent/EP0361487A1/de not_active Withdrawn
  • 1989-09-28 EP EP19890911046 patent/EP0436615A1/de active Pending
  • 1989-09-28 JP JP1510301A patent/JPH04503739A/ja active Pending

Patent Citations (3)

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