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JP2005304080

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2005304080
PROBLEM TO BE SOLVED: To improve the irregularity of the stiffness of a conventional speaker
electroacoustic transducer. SOLUTION: A frame, a motor assembly for providing a magnetic field
crossing a magnetic gap, a coil winding type for supporting a voice coil in the magnetic field, a
diaphragm attached to the coil winding type, and a spider An electro-acoustic transducer is
provided. The diaphragm is connected by its periphery to the frame at its outer periphery, the
spider having an inner periphery, which is connected to the coil form, and the spider Have an
outer peripheral edge, which is connected to at least one of the frame and motor assembly, and
the spider has a plurality of rolls, of which the roll immediately before the inner peripheral edge
is adjacent to the inner peripheral edge. A roll having a first height and immediately adjacent to
the outer peripheral edge has a second height, such that the second height is less than the first
height. The surrounding portion may have a plurality of rolls. [Selected figure] Figure 1
Speaker spider with reverse roll
[0001]
The present invention relates to electrokinetic electroacoustic transducers (electrodynamic
transducers), in particular to the structure of moving coil loudspeakers. However, it is believed to
be useful in other applications as well.
[0002]
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Various forms of centering spiders used in speakers are known. For example, the centering
spiders illustrated and described in U.S. Pat. Nos. 2,201,059, 2,295,483 and 5,715,324 are
known. The implication of such an enumeration does not state that the prior art search has been
thoroughly carried out or that there is no related technology other than the one listed above. It
should not be taken to imply that such a statement.
[0003]
The suspension mechanism of the speaker includes a diaphragm surround (diaphragm surround)
and a voice coil centering spider. The function of the spider is to center the voice coil in the
permanent magnet motor magnetic gap of the speaker, and at the same time, to allow linear
movement of the voice coil in the magnetic gap, Thereby, the diaphragm is driven as linearly as
possible. The voice coil is attached to the diaphragm by a coil form.
[0004]
Usually, the spider is formed from a woven material impregnated with a thermosetting resin. It
contains, for example, natural fibers or synthetic fibers. Then, the resin-impregnated woven
material is heated in a mold and formed into a corrugated (corrugated) shape. That is, a plurality
of rolls are formed. They are usually concentric with the axis of the voice coil former and usually
have the same height and the same arc. The spider is then attached to the coil former at its inner
periphery. Also, the speaker magnet motor assembly is attached to the speaker frame at its outer
periphery. For it is usually the place where the frame and motor assembly are combined. The
inner peripheral edge of the spider has the same movable range as the movable range of the coil
winding type. The outer periphery of the spider is stationary as it is attached to the frame and /
or assembly.
[0005]
Conventional spiders have an uneven stiffness in relation to force and deflection. When
calculating the amount of material in a conventional spider roll, it is clear that the amount of
material is higher as the roll is on the outside. That is, the amount of material is larger as the roll
is farther from the axis of the coil winding type. For this reason, in other words, since the amount
of material increases as the distance from the axis of the coiled winding increases, the stiffness of
these rolls is reverse in the outward direction. In other words, the stiffness decreases with
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increasing distance from the coiled and voice coil axes.
[0006]
As means for solving the problems described above, the present invention provides, for example,
means that fall under any of the following (1) to (6). (1) A frame, a motor assembly for providing
a magnetic field across a magnetic gap, a coiled coil for supporting a voice coil in the magnetic
field, a vibration plate attached to the coiled coil, and a spider An electro-acoustic transducer,
wherein the diaphragm is connected to the frame at its outer periphery by a periphery, the spider
having an inner periphery, which is connected to the coil form And the spider has an outer
periphery which is coupled to at least one of the frame and motor assembly, the spider having a
plurality of rolls, of which The roll immediately adjacent to the inner periphery of the roll has a
first height, and the roll immediately adjacent to the outer periphery has a second height, the
second height being the first height Be less than And it is characterized by electro-acoustic
transducer. (2) The heights of the plurality of rolls decrease linearly from the roll immediately
before the inner peripheral edge adjacent to the roll immediately before the outer peripheral
edge adjacent, and at least one intermediate member is interposed A roll having a third height,
the third height being less than the first height but greater than the second height. The
electroacoustic transducer according to (1), characterized in that (3) The electro-acoustic
transducer further includes at least one intermediate roll, the roll having a third height, the third
height being the first height The electroacoustic transducer according to (1), characterized in that
it is less than the height but is greater than the second height. (4) A frame, a motor assembly for
providing a magnetic field across a magnetic gap, a coiled coil for supporting a voice coil in the
magnetic field, a vibration plate attached to the coiled coil, and a spider An electro-acoustic
transducer, wherein the diaphragm is connected to the frame at its outer periphery by a
periphery, the spider having an inner periphery, which is connected to the coil form And the
spider has an outer periphery which is connected to at least one of the frame and motor
assembly, and the periphery has a plurality of rolls. The roll immediately before adjacent to the
diaphragm has a first height, and the roll immediately before adjacent to the frame has a second
height, the second height being the first height. Like going below height And has electro-acoustic
transducer, characterized in that.
(5) The electro-acoustic transducer further includes at least one intermediate roll, the roll having
a third height, the third height being the first height The electro-acoustic transducer as set forth
in (4), which is characterized in that it is smaller than the second height but smaller than the
second height. (6) The heights of the plurality of rolls linearly decrease from the roll immediately
before the diaphragm adjacent to the roll immediately before the frame adjacent, as described in
(4). Electro-acoustic transducer.
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[0007]
That is, generally speaking, an electroacoustic transducer according to the present invention
comprises a support frame, a motor assembly for providing a magnetic field across a magnetic
gap, a coiled type for supporting a voice coil in the magnetic field, and the coil winding. A
diaphragm attached to the mold (and which is connected to the frame at its outer periphery by
its periphery) and a diffuser. The spider has an inner peripheral edge which is connected to the
coil form. The spider also has an outer periphery which is connected to at least one of the frame
and motor assembly. And this spider has multiple rolls. The roll immediately adjacent to the inner
periphery has a first height. The roll immediately adjacent to the outer periphery has a second
height, which is less than the first height.
[0008]
Particularly preferably, the electroacoustic transducer further comprises at least one
intermediate roll. The roll has a third height which is less than the first height but greater than
the second height.
[0009]
More preferably, the heights of the plurality of rolls decrease linearly from the roll immediately
before the inner peripheral edge adjacent to the roll immediately before the outer peripheral
edge adjacent.
[0010]
As apparent from the above description, according to the present invention, it is possible to
provide an electro-acoustic transducer in which the asymmetry of the stiffness of the spider is
improved.
[0011]
The spider, which is a component of the embodiment according to the present invention, has a
maximum roll height adjacent to the coil former and a reduction in roll height as it is
substantially further from the axis of the coil former. As it goes on, it has a retrogradely changed
corrugation or roll, pitch or height.
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[0012]
Referring to FIG. 1, the speaker 9 has a support frame 10 and a motor assembly.
The illustrated motor assembly includes a back plate 12 which also serves as a central magnetic
pole, a permanent magnet 13 and a front plate 14, all of which provide a substantially uniform
magnetic field across the magnetic gap 15. There is.
The voice coil former 16 supports the voice coil 17 in the magnetic field.
The current from the amplifier circuit 40 is related to the program material and should be
electroacoustically converted by the speaker 9, which drives the voice coil 17 and, as is known,
the magnetic gap 15. Reciprocate axially inside. A conical diaphragm cone 18 is attached at its
own tapered end (apex) to one end of the coil former 16 which is located outside the motor
assembly 12, 13, 14 It is also connected to the frame 10 by means of a circumferential part 19 at
its outer periphery. A spider 20 is then connected to the frame 10 at the outer periphery of the
spider itself. The spider 20 has a central opening 22 to which the coil former 16 is attached. A
suspension portion consisting of the surrounding portion 19 and the spider 20 causes the voice
coil 17 to reciprocate in an axial direction within the magnetic gap 15.
[0013]
A typical, but not by way of example, structure for completing the electrical connection between
the speaker terminals 24, 25 and the voice coil conductors 26, 27 is illustrated in FIG. The voice
coil conductors 26, 27 are straight along the sides of the coil former 16 and pass through the
central opening 22 of the spider. And, the crossing position where the coil form 16 and the
tapered end of the cone 18 meet is further passed. The leads 26, 27 then cross on the front slope
to points 28, 29 on the front slope 32 of the cone 18. The flexible conductors 30 and 31 are then
connected at the points 28 and 29 respectively. The connection technique itself at the points 28,
29 may of course be selected as appropriate. Also preferably, the leads 26, 27 may be or may be
any one or more of a non-conductive adhesive tape or a non-conductive adhesive or any other
non-conductive adhesive. It is fixed to the front slope 32 of the cone 18 by using a combination.
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[0014]
The spider 20 is configured such that as the roll 36-1 adjacent to the coil former 16 has a
maximum roll height and becomes substantially far from the axis of the coil former 16, its rolls
36-n (n Is such that it has a reversely changed corrugation or roll 36, pitch or height, such that
the roll height of two or more natural numbers decreases. The reduction in the roll height of the
roll 36 as described above corrects the above-mentioned stiffness inconsistency. That is, it has a
plurality of rolls, ie, each inner roll 36-1, 36-2,. . . By increasing the amount of material used, that
is, the inner rolls 36-1, 36-2,. . . The more outer roll. . . It is corrected by having a height and / or
pitch greater than 36- (n-1), 36-n. This causes each of the inner rolls 36-1, 36-2,. . . The stiffness
of the belt is effectively mitigated, these stiffeners roll outside. . . Harmonized to the stiffness of
36- (n-1), 36-n, the stress is homogenized along the radius of the spider 20. Accordingly, the
linearity of the operation of the voice coil 17 is improved, and therefore the distortion caused by
the non-linear operation of the voice coil 17 and the coil winding 16 is alleviated.
[0015]
The reduction pattern of the height of the plurality of rolls 36 may be linear, exponential,
stepped, or other manners. In short, along the radius of the spider 20 from the roll 36-1
immediately before adjacent to the coil form 16 to the roll 36-n immediately before adjacent to
the frame 10 and / or the motor assembly 12, 13, 14 The stiffness of the roll 36 is substantially
uniform, and the roll 36-1 immediately before adjacent to the coil form 16 to the frame 10 and /
or the roll 36-n immediately adjacent to the motor assembly 12, 13 or 14 from immediately
before. The action of causing the stress to be uniformed along the radius of the spider 20 may be
substantially exhibited. To this extent, the spider 20 adopts a roll 36 whose roll height is
decreasing, i.e., a retrograde roll 36, from the inside diameter of the spider itself to the outside
diameter of the spider itself. The individual arcs or radii of the roll 36 may be reduced from the
inside diameter of the spider 20 to the outside diameter.
[0016]
The side walls of the roll 36 may be shortened from the inside diameter of the spider 20 to the
outside diameter. The decreasing plurality of rolls 36 balance the stresses more evenly across the
width of the spider 20. Also, with respect to the plurality of smaller rolls 36, where the outer side
of the plurality of rolls 36, that is, the spider 20 is connected to the frame 10 and / or the motor
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assembly 12, 13, 14 at its outer peripheral edge, It may be provided with a flat-shaped base, or it
may be a cup-shaped base as shown. In addition, with regard to the smaller reverse roller 36, the
portion for attaching the central opening 22 of the spider 20 to the coil form 16 may be neck-up
in shape. The shape may be neck-down as shown. The compliance of the spider 20 is more linear
over the entire flexible area of the spider 20 as the voice coil 17 moves in the magnetic gap 15.
Thus, non-linear distortion is mitigated. Also, in this novel invention, the geometrical geometry as
described for the retrograde roll 36 in the previous invention is the peripheral portion 19 '(19
dashes) of the speaker cone 18 as shown in FIG. May be adopted as multiple roles in
[0017]
FIG. 1 is a partial cross-sectional view of a speaker according to an embodiment of the present
invention. FIG. 2 is a partially enlarged cross-sectional view of a speaker according to another
embodiment of the present invention.
Explanation of sign
[0018]
9 Speaker 10 Frame 15 Gap 16 Winding Type 17 Coil 18 Diaphragm 19 Surrounding Part 20
Spider 36-1 Roll 36-2 Roll 36- (n-1) Roll 36-n Roll
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