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JPS53131331

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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 JPS53131331
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are schematic points m1 showing an
example of a conventional cone-shaped and horn-shaped speaker, and FIG. 3 is a baffle plate of
the speaker of FIG. Explanatory drawing explaining the state of the case, FIG. 4, FIG. 5 is a
schematic side sectional view which shows the example which is different from each other which
implemented this invention to the cone-shaped speaker, FIG. 6 shows the horn-type speaker of
this invention. Is a schematic side sectional view showing an example implemented in A и и и и и и и
magnetic circuit, 1 ...... magnet, 4 ...... voice coil, 8-tatami ... fist frame, 12 ...... horn, 13
иииииииииииииииииииииииииииииииииииииииии Damping material.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker for
driving a voice coil well in a magnetic circuit portion. In the cone speaker and the horn speaker,
in the cone speaker shown in FIG. 1, the speaker unit F is a baffle plate made of a massproducing wood or synthetic resin plate or the outer peripheral portion of the frame 8. H) и и и и + t
3-) 3 и 3 и / и,-y 2 fixed to the cabinet 9 by clamp. A magnetic circuit portion A composed of a
magnet 1, a yoke 3 and a center ball 2 for driving the voice coil 4 is directly fixed to the frame 8.
For this reason, when the cone 5 vibrates at the time of use, the cabinet vibrates under the
influence of the change of the atmospheric pressure inside or the direct sound pressure, so-called
box noise occurs, and the vibration of this cabinet directly It is transmitted to A and vibrates this
circuit part A. The force coil 15 and the voice coil 4 are Eno / 7 and Y / P6 which perform the
anti-vibration action, and they are supported by the frame 8 and do not perform the same
movement as the magnetic circuit part Aa. According to the relative positional relationship
between the voice coil 1 eft-il 4 and the magnetic circuit portion A, as shown by the lines in FIG.
Occurs, and a back electromotive force is generated in the voice coil 4. For this reason, the
reproduced sound produces distortion, which has a great adverse effect on characteristics such
as harmonic distortion, intermodulation distortion, transient characteristics, and so on, and to the
sound quality of the tonal range. , 3) adversely affect. Fig. 2 shows a conventional horn-shaped
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speaker, and in this speaker too, there will be almost the same drawbacks as the abovementioned cone-shaped speaker. The same reference numerals as in FIG. 1 denote the same or
corresponding parts. The present invention is achieved by attaching the magnetic circuit portion
f to the frame and attaching the vibration member to the frame (!: S between the frame and the
vibration isolation member to isolate the magnetic circuit portion from the frame by vibration).
The purpose of the present invention is to solve the above-mentioned conventional drawbacks,
and an embodiment of the present invention will be described below with reference to the
drawings. FIGS. 4 and 5 show different embodiments of the cone-shaped speaker, and the one in
FIG. 4 is a magnetic circuit portion A or magne to drive the voice coil 4 and a center provided on
the front surface thereof. Ball 2-1 A yoke 3 surrounding the outside of the magnet 1 is formed,
and the outer surface of the yoke 3 is made of foamed ethylene, foamed [cellular synthetic resin
such as styrene, etc. 4.1.
The four vibration damping members 14 are covered in layers, the mounting members 13 are
fitted on the outside of the vibration damping members 14, and the mounting members 13 are
fixed to the frame 8 by screws 15. It is also made to intervene between the front and the back
part 8 a of the frame 8. 5, the front surface of the mounting member 13 and the yoke 3 having
an angle-shaped cross section in which the vibration insulating material 14 made of the same
material as that of FIG. 4 is fixed to the outer peripheral front surface of the yoke 3 And the
magnetic circuit portion A is attached to the frame 8 in the same manner as the embodiment of
FIG. The configuration of the loudspeakers in FIGS. 4 and 5 other than those described above is
substantially the same as that in FIG. 1, and therefore parts identical or equivalent to those in
FIG. 1 are shown in FIGS. The same reference numerals are given to and the description is
omitted. FIG. 6 shows an embodiment of a horn type speaker, in which a nonmagnetic auxiliary
plate 16 is provided on the outer periphery of the yoke 3 of the magnetic circuit portion A, and
the outer surface side of the auxiliary plate 16 and the yoke 3 are provided. The vibration
insulating material 14 made of the same material as that described above is disposed on all the
bottom outer surfaces 1, 2 and 5 'bodies, and the mounting member 13 substantially the same as
that shown in FIG. The mounting member 13 is fixed by screws 15 to the back surface 8a of the
frame 8 which also serves as the horn. This speaker has the damper 6 attached to the auxiliary
plate 16, and the configuration of the speaker in FIG. 6 other than the above-described 7 is
almost the same as that in FIG. The same or corresponding parts are denoted by the same
reference numerals in FIG. The loudspeakers shown in FIGS. 4 and 6 configured as described
above have the same vibration as that of the cabinet, the cabinet 8 fixed to the buckle plate, the
frame 8 and the mounting member 13 which are affected by the sound pressure. However, since
the magnetic circuit portion A is not directly mechanically connected to the mounting member
13 but is fixed at a constant distance via the vibration-proof material 14, the magnetic circuit
portion A includes the frame 8 and the mounting member. It remains stationary at all times
without being affected by 13 vibrations. Further, since the speaker of FIG. 5 is fixed to the frame
8 and 2) the guard 6 magnetic circuit portion A and the fixing member 13 fixed thereto via the
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vibration proof material 14, the magnetic circuit portion A is a frame 8 Stay static without being
affected by According to this invention, since the magnetic circuit portion A consisting of the
magnet 1, the yoke 3 and the center ball 2 is vibrationally isolated by the vibration-proof
material 14, it receives an external vibration through the frame 8. There is no In addition, since
the relative positions of the magnetic field of the Heuss coil 4 and the magnetic circuit portion A
do not change, and the magnetic circuit portion A is kept stationary, good electro-mechanical
conversion can be performed.
In addition, in this invention, it is necessary that the anti-vibration material vibrates at the
frequency C of the audio frequency band and has a characteristic having no response, but if it is
provided with this special order, it is appropriate You can also choose 0). The magnetic circuit
unit is not necessarily limited to the configuration JO of the embodiment, and the arrangement of
the magnet, the yoke O, etc. can be appropriately changed.
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