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JPS5669197

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DESCRIPTION JPS5669197
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a conventional speaker
vibrator, FIG. 2 is an explanatory view of an embodiment of a speaker according to the present
invention, and FIG. 3 is a speaker according to the present invention. It is explanatory drawing of
the speaker vibrating body to be used. 11, 31.41 · · · approximately convex shaped members, 12,
32. -142: substantially hollow truncated cone shaped member 14.33.43: voice coil bobbin.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker, and a
speaker vibrating body is comprised of a substantially convex shaped member constituting an
acoustic radiation surface portion and a substantially hollow truncated cone shaped member
adhered to the peripheral side of the substantially convex shaped member. By this configuration,
the central axis of the voice coil bobbin and the central axis of the speaker vibrating body can be
easily matched, so that it is easy to incorporate the speaker without a rattling sound, and the
excellent sound quality can be obtained. To provide a speaker. 1-Sandstone ZN-Conventional, for
example, a cone type speaker gives rise to a sound effect as a shape effect even if piston
vibration. For example, a speaker with an apex angle of 12Cf 'and an aperture of 8 inches has a
diameter of 1K1 ( A peak of about 5 dB in Z and a dip of about 61 G (more than 10 dB in z occur.
This penetration and dip causes a large apical angle, and it is necessary to flatten the acoustic
radiation surface in order to eliminate the shape effect. However, flat-plate speaker vibrators of
the same thickness have lower co-shooting frequency than cone-shaped ones, so the flat-platespeaker vibrator has four people larger than cone-shaped ones, and it is possible to bend 1 rigid I
have to make the hospital fatter. Then, since the embedding of the speaker vibrating body
becomes heavy, the speaker vibrating body is preferably made of a material having a low degree
of elasticity, and such a material is, for example, foam heavy load resistance such as polystyrene
foam. However, when attempting to assemble a speaker using a flat-plate speaker vibration body
instead of a cone shape, the voice coil bobbin should not be a speaker hem block so that the
central axis of the voice coil bobbin and the central axis of the speaker vibration body are not
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lost. It is difficult to measure, and therefore, the center axis of the straw is deviated, resulting in
generation of rattling noise and the like, resulting in deterioration of sound quality. On the other
hand, in the case of the conventional cone type speaker, the jig is extremely large on the center
pole of the magnetic circuit, and the central axis of the voice coil bobbin and the central axis of
the speaker vibrating body can be easily aligned There is no buzzing sound or the like. From this,
as shown in FIG. 1, a structure in which a member obtained by dividing a flat-plate speaker
moving body into a center cap portion 1 and a peripheral vibration mfA2 is bonded with an
adhesive is proposed (Japanese Utility Model Application No. 53) -1348222). As described above,
by dividing the flat-plate-like speaker 41 M moving body, the jig used in the case of the
conventional cone-shaped speaker can be used also in the case of the flat-plate speaker moving
body, and It can be made. However, the loudspeaker vibrator having the structure shown in FIG.
1 has a junction between the center cap and the peripheral vibration portion on the acoustic
radiation surface, so that the acoustic radiation surface is not uniform and it is not possible to
obtain very good sound quality Can not.
In addition, when a speaker imaging moving body is made of a foamed resin material, it is
preferable to stick a thin film having a large rigidity to the acoustic radiation surface portion,
since piston vibration -3 = 4, 4-a narrow band. In the speaker moving body of this type, a
paragraph may occur at the boundary between the center cap portion and the peripheral
receptive portion, or a swelled portion may be formed by an adhesive, so thin, vague wrinkles
may occur, and 1-111 life is sufficiently obtained. There is also a defect that the thin film does
not extend from the acoustic radiation surface, as the piston's vibrating region does not expand
by about 70 and the center of the thin film coincides with the center of the acoustic radiation
surface. The present invention is a book in which the above-mentioned drawbacks are eliminated,
and an embodiment of a loudspeaker according to the present invention will be described below.
FIG. 2 is an explanatory view of an embodiment 11 of a speaker according to the present
invention. In the figure, 11 is a foamed lI such as expanded polystyrene! The member 11 is a
member constituting a part of a speaker vibrating body having a substantially convex shape
formed by molding or the like, and a person on the surface 11 'is an acoustic radiation surface of
the speaker vibrating body. In addition, in order to increase the rigidity of the speaker vibrating
body and to widen the piston vibration holding area on this surface 11 ', a rigid thin film such as
Iinopact Styrol thin film, a gauze or the like is adhered at the time of molding. It is good. 12 is a
substantially hollow truncated cone 4-). It is a member which constitutes 1 part of the speaker
vibrating body which formed foaming resin, such as expanded polystyrene, by metal mold
molding etc. in shape. Then, the substantially convex shaped member 11 is fitted and adhered to
the substantially hollow truncated cone shaped member 12 to constitute a speaker vibrating
body. A voice coil bobbin attachment is formed with a concave 13 at the junction of the
substantially convex shape member 11 and the substantially hollow truncated cone shape
member 12 on the opposite side of the sound emission surface 11 'of the speaker vibrator. Also,
the work of attaching the voice coil bobbin 14 to the speaker vibrating body is easy, and the
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coupling strength of the voice coil bobbin to the speaker imaging body is large. In the figure, 15
is a damper, 16 is a top plate, 17 is a magnet, 18 is a center pole, 19 is a frame, 20 is an edge,
and 21 is an edge supporter. In this way, the Eno / 20 is attached to the substantially hollow
truncated cone-shaped member 12 first, and then the setter pole 18 of the magnetic circuit
consisting of the top plate 16, the magnet 17 and the center pole 18 is inserted. The jig used in
the conventional cone-shaped speaker is placed in the section, and the voice coil bobbin 14 and
the damper 15 are adhered to each other as a 5- (guide), and the damper 15 is attached to the
frame 19. Next, the hollow hollow truncated cone shaped member 12 is attached to the voice coil
bobbin "4" Wj, and the edge 20 is attached to the frame 19.
Alternatively, the voice coil bobbin 14 and the damper 15 may be adhered to the substantially
hollow truncated cone-shaped member 12 bonded to the insert / 20 by using the jig, and then
adhered to the frame 19. In short, it is incorporated in the same manner as the conventional cone
type loudspeaker. Thereafter, the jig is removed, the substantially convex shaped member 11 is
fitted to the substantially hollow truncated cone shaped member 12, and both are adhered with
an adhesive. Finally, the edge supporter 21 is bonded to make the acoustic emission surface and
the frame surface of the speaker vibrating body substantially flush. When the substantially
convex shaped member 11 and the substantially hollow truncated cone shaped member 12 are
bonded, if an epoxy-based adhesive having one rigidity is used, this rigidity widens the piston
vibration zone. As described above, the speaker ff1i body is configured by the substantially
convex shaped member and the substantially hollow truncated cone shaped member, thereby
producing 6-\-one. Even in the case of a flat-plate speaker moving body, the speaker can be
easily and accurately assembled using the jig used for the conventional cone-shaped speaker, and
the central axis of the voice coil bobbin and the central axis of the speaker vibrator There is no
generation of a squeaky sound or the like due to the presence of noise, and the sound quality is
superior. In particular, the sound radiation surface has no joint as shown in FIG. 1 and is uniform,
so the sound quality is excellent. In addition, even when an 11 Illj thin film is attached to the
acoustic emission surface, it can be attached at the time of formation of the substantially convex
shaped member in the present invention, but in the structure of FIG. While this can not be
applied and the center of the medium thin film acoustic emission surface of the filll thin film
tends to deviate, such operational difficulties are not found in the present invention. In addition,
in the present invention, it is difficult to produce a thin thin film, vines and the like, the purpose
of enhancing rigidity is sufficiently exhibited, and the sound quality is good, while the structure
shown in FIG. In the boundary between the center cap part and the peripheral vibration part,
wrinkles are likely to occur due to swelling by the paragraph or adhesive, hard 7-hard, 7 purpose
to enhance the injection h is not achieved enough, the sound quality is also n Not so good.
Further, in the present invention, if a material having a substantially 1-Ij property is used as the
material forming the substantially convex shaped member 11, the piston vibration band can be
formed without sticking a single-layer thin film on the acoustic radiation surface. It can be
spread. As described above, in the present invention, since the acoustic radiation surface is
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constituted by the insertion of a single substantially convex shaped member 11, the acoustic
radiation surface becomes uniform and has excellent sound quality.
Further, since the voice coil bobbin 14 is coupled to the speaker vibrating body so as to be held
between the substantially convex shaped member 11 and the substantially hollow truncated cone
shaped member 12, driving energy is favorably transmitted from the voice coil bobbin to the
speaker vibrating portion. . 3 and 4) and other explanatory views of the speaker vibrating body
portion of the speaker according to the present invention. Also in this case, the configuration is
almost the same as that shown in FIG. 2, and the shapes of the substantially convex shaped
member 31.41 and the substantially hollow truncated cone shaped member 32.42 are only
slightly different. In addition, it is a 33.431 voice coil bobbin. The above-mentioned speaker
according to the present invention is formed by joining the substantially convex shape 8-first
member and the substantially hollow truncated cone shape member to form a speaker vibrating
body, and the sound emission surface portion of the speaker is the substantially convex shape
member. The speaker assembly can be made as easily and accurately as in the conventional conetype speaker, and it is possible to emit a superior sound quality with no rattling noise, and in
particular, the sound radiation surface is substantially convex. Since only the shape member is
used, the acoustic radiation surface is uniform, the sound quality is excellent and sticky, and even
if the rigid thin film is formed on the acoustic radiation surface, the rigid thin film is less likely to
be wrinkled.
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