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Description 1, title of the invention
Horizontal radiation type speaker device
3. Detailed Description of the Invention The present invention divides the box into two parts by
the inner partition plate and the diaphragm, and reduces the vibration force of the diaphragm to
the sound of the front surface of this diaphragm of the speaker-the wave number of the
diaphragm and the unnecessary high The present invention relates to a lateral radiation type
speaker device capable of removing an area. . A conventional speaker has a plate 2 having a
center pole 1 as shown in FIG. Ring-shaped magnet3. Similarly, the frame 6 is coupled to the
magnetic circuit 5 constituted by the ring-shaped upper plate 4, the edge of the moving plate 7 is
coupled to the periphery of the frame 60, and the voice coil 8 is coupled to the central portion of
the diaphragm 7. The voice coil 8 is fitted into the magnetic gap 9 of the magnetic circuit 6
without eccentricity. As shown in FIG. 2, the speaker having such a configuration is configured to
be incorporated in the portion having the sound release hole 12 of the case 11 of the radio
receiver 1o. In this configuration, the sound of the speaker is radiated from the front surface of
the diaphragm 7 through the sound emission hole 12 of the case 11 in the vibration direction of
the diaphragm 7, as shown by the broken line of the sound pressure frequency characteristic of
FIG. To the lowest resonant frequency f. Were high and there were a lot of unnecessary highs.
EndPage: The present invention eliminates the above-mentioned conventional drawbacks. An
embodiment of the present invention will be described below with reference to FIGS. 3 to 13.
First, in FIGS. 3 to 6, reference numeral 13 denotes a bottom plate on which a circular hole 14 is
formed at the central portion, and a support piece 15 projecting upward at the central portion of
each of four sides. Circuit 16 is incorporated. The magnetic circuit 16 comprises a plate 18 with
a center pole 17. Ring-shaped magnet 19. The lower part of the plate 18 is fitted into the circular
hole 14 of the bottom plate 13 and the upper end of the support piece 15 is in contact with the
lower surface of the magnet 19. A rectangular outer frame 21 is incorporated in the outer
peripheral portion of the magnetic circuit 16, and a notch 22 is formed in the center of the four
sides of the outer frame 21 for fitting the peripheral surface of the magnet 19; Sound emission
holes 23 on the back side of the diaphragm are provided on both sides of the notch 22 on one
side. On the outer frame 21 is incorporated a diaphragm 26 formed in a rectangular shape in
which a voice coil 25 is embedded in the magnetic gap 24 of the magnetic circuit 16. A cover 27
provided with side plates on three sides is assembled, and the peripheral portion of the
diaphragm 26 is held and fixed by the cover 27 and the outer frame 21. Further, the sound
output holes 23 of the outer frame 21 and the sound output holes 28 on the front surface side of
the diaphragm without the side plate of the cover 27 have different directions by 180 degrees.
The outer frame 21 VC is provided with a terminal 28. With such a configuration, the schematic
configuration is shown in FIG. 7, the one schematically shown is shown in FIG. 8, and the
equivalent circuit diagram is shown in FIG. In the figure, So is the area of the diaphragm for the
speaker, ms is the effective mass of the speaker, C8 is the compliance of the speaker, and Fo is
the force acting on the diaphragm of the speaker. Is the vibration speed of the speaker
diaphragm, CA is the cavity (acoustic compliance) jA is the sound pressure of the front cavity, UA
is the volume speed of the front cavity, Sl is the opening area of the front, and the tag is the force
applied to the front virtual rigid body, ? 1 is the vibration velocity of the front virtual rigid body,
ml is the mass of the front virtual rigid body (denoted oy), R1 is the radiation resistance of the
front virtual rigid body, M1 is the radiation reactance of the front virtual rigid body, and the front
and rear openings. Suppose that we put a perfect rigid body with zero mass. Focusing on the
front cavity here, UA = 5 ovo-(2) holds. From this, the mechanical impedance 2m from the
diaphragm side of the cavity becomes the acoustic impedance of the cavity as ?. Also, by placing
a virtual rigid body at the front opening: 1SoVo = S, Vl,... (5), and the mechanical impedance Zm1
seen from the diaphragm side of this virtual rigid body is Assuming that the mechanical
impedance of the virtual rigid body is 2 m 2. Similarly, when the mechanical circuit of this
transverse radiation type speaker device is obtained as shown in FIG. The lowest resonance
frequency f0 of this lateral radiation type speaker device is: (7)... (8) EndPage: 2. This is
considered to be an increase of the conventional speaker fo. This makes it possible to lower the
fo as the speaker by providing a cavity on the front and rear of the speaker, and as the CA / S0 in
FIG. 9 shows, the front cavity acts as a kind of high cut filter in the high region I understand. The
sound pressure frequency characteristics of the horizontal direction radiation type speaker
device of this configuration is such that the lowest resonance frequency is low as shown by the
solid line in FIG. 10, unnecessary high frequencies are cut, and the low frequency region is
excellent. . FIG. 11- shows another embodiment and the bottom plate 13 shown in the above
embodiment. Outer frame 21. The box 30, which is configured by the cover 27 as a bottom plate,
a ceiling plate, a front plate, a rear side plate, and one side plate is partially provided from above,
and the other side plate is partially provided from below, The diaphragms 26 of the speakers are
connected so as to connect between the side plates, and the diaphragms 26 are inclined and
connected so that the sound output holes 23. 28 have a large opening in the reverse direction.
Further, the one shown in FIG. 12 is configured by combining a box 32 having a sound hole 23
on one side and a speaker mounting hole 31 on the top and a cover 27 having no bottom and
one side, The sound output holes 28 and the sound output holes 23 of the cover 27 are in
opposite directions, and this is an embodiment in which the diaphragm 26 of the speaker is
circular. Further, the embodiment shown in FIG. 13 is an example applied to a radio receiver and
a speaker box, and a sound output hole 28 is provided on one side of the case 33, and an L shape
is continuously formed in the case 33 continuously with the sound output hole 28. The
diaphragm 26 of the speaker is mounted on the diaphragm 34, and the sound on the front of the
diaphragm 26 radiates from the sound emission hole 28, and the sound on the back of the
diaphragm 26 is in the diaphragm 34. A high sound speaker 36 is incorporated in the side plate
which is radiated to the bank cavity 35 formed by the case 33 and on the side on which the
sound emission hole 28 is formed. With such a configuration, radio broadcasting can be enjoyed
without being attenuated if the sound release hole 28 is set to the upper side even if it is housed
in a chest pocket in a pocketable radio or the like. As described above, since the lateral radiation
type speaker device of the present invention is configured, the lowest resonance frequency can
be lowered and unnecessary high frequency output can be cut even if a speaker with a small
aperture is used. It has the advantages of being able to freely select the sound emission direction
when used in a small radio receiver or tape recorder, and to increase the degree of freedom in
design. It is a dog of industrial value.
4. Brief description of the drawings. FIG. 1 is a partially cutaway perspective view showing a
conventional speaker, FIG. 2 is a perspective view of a radio receiver using the same speaker, and
FIG. 3 is a lateral radiation type speaker of the present invention. Fig. 4 is an exploded
perspective view showing an embodiment of the apparatus 1, Fig. 4 and Fig. 6 show и lJ ', '41. @
6-D4-Oyu, -8-3 cross section, FIG. 7 is a schematic block diagram of the same apparatus, and FIG.
Fig. 9 is a diagram of the equivalent circuit of Fig. 9, Fig. 10 is a sound pressure frequency
characteristic of the conventional speaker and the lateral radiation type speaker device of the
present invention, and Fig. 11 is a sectional perspective view of another embodiment. FIG. 12 is
an exploded view of another embodiment [Threshold, FIG. 13 is a perspective view of still
another embodiment. 13 # ? 111--bottom plate, 14 и и и и и и и и и и и и и и и и IIII и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и 2.2 О и и и 2.2 2.2 и и и и и и и и и Sound emission hole, 24 и и и-magnetic Ganobu, 25 и и
и и voice coil, 26 и и и fist и и и diaphragm и 27 и и и и и и и и и и released Sound hole, 30 и и и и и и и и и и и и и и и и и и
O11 back cavity. Name of agent Attorney Nakao Toshio and one other person. EndPage: 3 Figure
7 273 Figure 8 Figure 9 Figure 10 $ 9 (Hl) EndPage: 4 Figure 11 Figure 3 13 EndPage: ?
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