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JPH01256898

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DESCRIPTION JPH01256898
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker unit in an audio device, and more particularly to a diff user. [Background Art]
Conventionally, as a speaker unit of this ridge, those shown in FIG. 3 and FIG. 4 are known. In (-),
the code (1) is a pole piece, and the magnet (2) is fixed to the pole piece in a contact material. (3)
is fixed to the pole piece (1) with a plate fixed to the magnet (2) by the cocoon layer material at a
constant distance t. (41 is a frame, and is fixed to a magnetic circuit composed of a pole piece (1),
a magnet (2) and a plate (3). The voice coil M (5b) is a diaphragm, and a diaphragm system is
constituted by the voice coil M (5b) and the voice coil M (5a) and the diaphragm (5b). Of the
vibration system, the voice coil (5a) is disposed and held at the center position of the field
portion of the front-side circuit by the support member (7). The outer peripheral portion of the
support member (7) is accommodated in the inner peripheral portion of the frame (4). I took it. A
Diffuser (6) of a predetermined shape is disposed at a predetermined interval t with the
diaphragm (5b). The Diff User (61 is fixed to the frame (4). Next, the operation will be described.
The input signal generates a driving force in the voice coil (5a) located in the magnetic field unit,
the driving force is transmitted to the handling thread, and the moving plate (5b) is lowered, and
this vibration causes vibration. Sound is emitted from wJ 孜 (5b). That the driving force is
generated in the voice coil (5a) is as a reaction force of the driving force. The magnetic circuit
also receives the force in reverse 10,000 times. The force received by the magnetic circuit travels
through the frame (4) and is emitted as sound from the frame surface. Usually, as the material of
the frame (41, a relatively rigid metal such as an aluminum die cast or an iron plate, a metal with
little internal loss, or a plastic which is easy to form but is low in rigidity and easy to generate an
inherent sound is used. Furthermore, the sound radiated directly from the diaphragm (5b) is
controlled by the diff user (6). Therefore, in consideration of mechanical strength in designing, it
is necessary to apply a device for sticking the entire material with a large loss in order to
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suppress unnecessary radiation due to the vibration of the knife user 61 (61 itself. The sound
radiation is the vibration 6 (sb) only, and the other part is not considered to be the vibration,
ideally the frame (4? The secure user-fil is required to be a high rigidity, high internal loss
material or structure.
[Problems to be Solved by the Invention] Since the conventional speaker unit is configured as
described above, the knife user (61 needs a high rigidity and a large internal loss material or
structure). In order to suppress the unwanted radiation of the Dough User (6), it may be
considered to make the fixing method totally strong, but in this case, even if the mechanical
strength is increased, the leg part to be added to the Dough User +61 'becomes large 92 By
increasing the number, it is a form to sound radiation! There is a drawback of giving #. Also, it is
conceivable to apply 9 of the lossy materials as mentioned above, but in this case. Deterioration
of workability (1) There is a problem that the necessity of post-processing is caused by
dimensional accuracy problems. Furthermore, when the internal loss is small, it is difficult to
suppress the unnecessary user's unnecessary vibration metal (6; itself, and hence the response to
the input is dulled by the resonance and the long tailing attenuation characteristics, and the
sound quality Deterioration was caused, and it was a problem in reproducing a faithful sound Pk.
The present invention has been made to solve the problems of the prior art as described above,
and it is possible to obtain a stiff user with a high internal loss and a high quality, no
deterioration in sound quality, good operability, and inexpensive and faithful voice. The purpose
is to provide a speaker unit that can play [Issue 'kj9! 1. Means for fire] The speaker unit
according to the present invention is a knife user formed of a material which is an anti-vibration
aluminum alloy sheet. [Operation] In the speaker unit according to the present invention, the stiff
user is formed of the anti-vibration aluminum alloy, and the stiff user of the stiff user can be
maintained while the internal loss can be increased to suppress the radiation due to unnecessary
photographing. . Embodiments of the present invention will be described below with reference to
the drawings. In FIG. 1 and FIG. 2, the code | symbol (6) is a knife user formed with a vibrationproof aluminum alloy (At-Ni type | system | group or A / knee 81 type | system | group). In
addition, the same reference numerals as those in the conventional example of FIGS. 3 and 4
indicate the same or corresponding portions. Next, four examples t of the vibration-proof
aluminum alloy used for the knife user in the present invention will be shown. Examples 1 and 2
are Al-81 thread alloy, and Examples 3 and 4 are AA-Ni thread gold alloy. In addition, the
component of each of these Examples is shown by 2 km percentage. (Example 1) (Example 2)
(Example 3) (Example 4) 81) 0 5 51) 0% Ni 6 Ni Ni 5% Fe O, 05 qb Fe O, 05% Fe O, 05% Fe O,
05% ZrO, 05% Zr 0J) 5 '% Zr 0J1) 5% Zr O, 051MM 0.1'4 MM 0.1'16 MM 0.1 q6 MM O, IT.
Na 0 J) 02% an O, 08% k-1 Remaining Sn OJ 8% M Residue At Residue M Remaining "MM" in the
above each example is a metal, and the composition is La 35% s C843 " * Nd 15%, Pr 4%, Sm 1%,
Y and other two. Reduction of anti-corrosion aluminum alloy "The cause and mechanism of
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second-phase particles and matrix boundaries, grain boundaries and cell boundaries of viscous
phase flow, as well as crystals such as dislocations, vacancies and stacking faults Absorption of
vibrational energy due to micro defects in the inside is considered. Damping capacity q-+
indicates a scale that converts externally applied vibrational energy into thermal energy. It is
represented by. A4-Si thread gold alloy used in Example fi + 12) of the present invention. When
Sl is added to ν, 81 particles are precipitated in M as a matrix to form all eutectic crystals. Then,
the interface of 81 particles, which is the second phase, absorbs aMJh to improve the damping
ability q′′1e. Fe, Zr, V, Ti and rare earth elements work to refine the crystal and increase the
grain boundaries, but also Na. Sr works to make 131 particles finer. Further, as in the second
embodiment, when 5n is contained (z is finely contained in the grain boundaries when z is
contained, the total viscosity of one grain boundary is increased, and the damping ability is
entirely improved. In the preferred embodiment of the present invention il + +2), the preferred
respective ranges of the respective components (l 鼠 100 minutes are as shown in Table 1 of the
arrows, and such problems as Δ ピ at most occur at all. . kQ 會 White 1 Ai of Example (1) (2) of
the Present Invention! In the -81 series alloy, it is preferable that the second phase particles (the
average particle diameter of 81 particles is 10 μm or less of the crystal structure is increased by
setting the EL <10 μm or less). , A large damping capacity can be obtained. Furthermore, it is
more preferable that the average particle diameter is 1 μm or less! More preferably, t, (, 5 μm
or less. In addition, 1) Example of the present invention + 31) Al-Ni alloy of 41 When kl Ic N i k 1
n is added, Ni particles are precipitated in the matrix d to form a eutectic structure. Then, the
interface of Al 3 N 4 particles, which is the second phase, is absorbed to improve the damping
capacity q-1t. In addition, Fe, Zr, V, Ti and rare earth elements refine the entire crystal to increase
grain boundaries and improve damping ability Q '. Further, as in the above-mentioned
embodiment (4), when Snn gold is contained, it is possible to finely precipitate in the grain
boundary to increase the viscosity [-increase of one grain boundary and to improve the damping
ability Q-'k.
In the preferred embodiment i31) 41 of the present invention, the preferred range (N settable
fraction) of each ash is as follows in Table 2 below. It will occur. In the kt-Ni alloy of Example 13
of the present invention, it is preferable that the average grain size of the second phase (A4N1
particles) is 10 μm or less and 10 μm or less in the crystal structure. The entire interface of the
two-phase particle can be increased to obtain a large damping capacity. The above average
particle diameter is preferably 1 μm or less! It is more preferable that L, <, 5 μm or less. Next,
Table 3 below shows a comparison of the At-Ni alloy, kt-8i alloy, kt (ADC-12), and Zn-k1 alloy
(trade name: Kosmar 2) in the examples of the present invention. As apparent from the abovementioned clothes, the damping ability Q is both the Al-Ni alloy and the AI-Si alloy of the present
invention. A7: Compared to (ADC-12), it is an order of magnitude larger, and although the 9
elastic modulus is slightly inferior, it is a range that causes no problem. It can be seen that the
internal loss of the speaker unit can be improved sharply compared to the conventional
configuration without losing its rigidity, and it is extremely good as a material for a stiff user.
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Recently, Zn-A1 alloy (part name: Kosmar Z) has attracted attention, but 1) The Al-Ni alloy and
the kt-Si alloy of the present invention have larger damping ability. The specific elastic modulus E
/ p (cm24)), which is proportional to the propagation speed, is also larger in the M-Ni alloy and
the Al-Si alloy and smaller in specific gravity, so that a light and highly rigid frame can be
provided. I took it. The Zn-A1 alloy (trade name: Kosmar 2) has a problem of corrosion resistance
as compared with kl (ADC-12) and the Al-81 thread alloy and kt-Ni alloy of the present invention.
In the present invention, as shown in FIGS. 1 and 2, the concept of "diff-user" includes those
located on the back of the diaphragm, and these also include At-Ni alloys, kt-81. It can not be said
that base alloys can be used. As described above, according to the present invention, since the
anti-vibration aluminum alloy is used as the material of the loudspeaker user of the speaker unit,
the anti-vibration effect can be increased while maintaining the rigidity, and There is an effect
that a high quality product with little unnecessary radiation can be obtained while maintaining a
good patternability which is not different from the conventional one.
[0002]
Brief description of the drawings
[0003]
1 and 2 are longitudinal side views of a speaker unit according to an embodiment of the present
invention, and FIGS. 3 and 4 are longitudinal side views showing a conventional speaker unit.
The code | symbol +1) in a figure is a pole piece and 12 + i magnet. 31 is a plate, (4) is a frame,
(5I is a vibration system, (6) is a Diffuser-1 (7) a support member. In the drawings, the same
reference numerals indicate the same or corresponding parts.
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