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JPS61264900

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DESCRIPTION JPS61264900
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device 1 for high frequency using a flat diaphragm, and particularly relates to prevention
of sound quality deterioration due to divided vibration and lateral vibration of the flat diaphragm.
[Prior Art] FIG. 2 is a cross-sectional view of a conventional high-frequency speaker apparatus
using a flat diaphragm, the reference numeral 1 is a flat diaphragm, and 2 is an edge for
supporting the diaphragm. The outer periphery is adhered and fixed to the frame. A reference
numeral 4 denotes a voice coil bobbin around which a voice coil (not shown) is wound, and the
flat plate diaphragm 11 is adhered and fixed. A spider 5 supports the voice coil bobbin 4 and the
periphery of the spider is bonded and fixed to the frame 6 described above. 6 shows a magnetic
circuit. FIG. 6 is a cross-sectional view of a conventional high-frequency speaker device using a
conical diaphragm, in which a portion 6 identical or corresponding to the second Q + is given the
same reference numeral 7, with a conical shape A diaphragm 8 is a damping agent for
supporting the diaphragm. In the speaker device configured as shown in FIG. 2, the voice coil C
in the magnetic gap of the magnetic circuit 6 (the two current flow (-drive is generated, and this
driving force is the voice coil bobbin) Diaphragm 11: The vibration plate 11 is transmitted
through 4 and vibrates to emit sound from the diaphragm. Also in the speaker apparatus C2
configured as shown in FIG. 6, the driving force generated by the same cl as in FIG. 2 is
transmitted to the conical diaphragm 7 via the voice coil bobbin 4 and the diaphragm Vibrates
and sound is emitted from the diaphragm. [Problems to be Solved by the Invention] In the abovementioned FIG. 2 (in the conventional high-frequency speaker apparatus described above, the
divided vibration I of error i72: in the higher frequency band 1: adversely affects the sound
pressure frequency characteristic) Was given. In the above-mentioned conventional highfrequency speaker apparatus described with reference to FIG. 3C, since the damping agent 8 is
used instead of the edge 2c of the one shown in FIG. 2, the one shown in FIG. Is reduced, and the
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adverse effect on the sound pressure frequency characteristics due to the divided vibration is
reduced. However, with reference to FIG. 6, in the speaker device, the vibration system opening is
small due to the amount g of the damping agent 8 and the uneven viscosity. When unbalance
occurs and the amplitude of the vibration in the forward and backward directions of the
diaphragm 7 becomes large, there is a problem that linear vibration in the forward and backward
directions (two lateral shake and the like occur. The present invention solves such a problem ((2),
which reduces the above-mentioned adverse effect of the edge in the high frequency band
spectrum, and causes no lateral vibration even when the amplitude of the diaphragm increases.
An object of the present invention is to obtain a one-speaker speaker device in which the
diaphragm is vibrated linearly.
[Means for Solving the Problems] In the present invention C: the speaker device according to the
present invention, the outer peripheral vicinity I of the flat plate diaphragm: damping agents
respectively applied to both side surfaces of the flat plate It is a thing. [Operation] In the present
invention, since the flat diaphragm is supported by the frame from the damping agent 1 applied
to both the outer and outer surfaces of the flat diaphragm in the vicinity of the outer periphery of
the flat diaphragm ≦; In addition, the vibration system of the diaphragm including the voice coil
bobbin is supported by a total of six points of a well-known spider supporting the voice coil
bobbin and two damping agents supporting the flat diaphragm. Therefore, even when the
amplitude of the flat diaphragm is large, the flat diaphragm vibrates linearly 1: without vibration.
An embodiment of the present invention will be described below with reference to FIG. 1 (2 g, the
same reference numerals as in FIG. 2 or 6 indicate the same or corresponding parts, and the
detailed description thereof will be omitted. Reference numeral 9 is a flat diaphragm having a
thickness of 6 °, and 10a and 10b are damping agents for supporting the flat diaphragm. The
damping agent 10a is applied to the front side of the flat diaphragm, and the damping agent 10b
is applied to the back side C, and these damping agents 10a and 10b are adhered and fixed to the
co-c two subframe 11. The sub-frame is fixed to the above-mentioned frame 5 c by adhesion ≦ 2.
In the speaker device 1 configured as described above C :, the driving force generated in the
same manner as the conventional speaker device described in FIG. 2 or FIG. 6 is the flat
diaphragm 9 via the voice coil bobbin 4. And the sound is emitted from the flat diaphragm. Since
the flat diaphragm 9 is supported by the damping agents 10a and 10b + 2, as described above,
the case of the speaker apparatus using the conventional edge 2 described with reference to FIG.
= In comparison, the divided vibration of the edge in the high frequency band is reduced, and the
adverse effect on the back pressure frequency characteristic due to the divided vibration C2 is
prevented. Flat plate diaphragm 9: The fixed voice coil bobbin 4 is supported by the spider 5c,
and the flat plate diaphragm is supported by the damping agents 10a and 10b on the front and
back sides separated by a distance of 6 W, respectively. The vibration system of the flat plate
diaphragm 9 is supported at one place by the spider 5 and two places by the damping agents
10a and 10b at two places. Therefore, the voice coil C: large current flows The amplitude of the
flat diaphragm 9 becomes large, and even if a lateral vibration force occurs, the lateral vibration
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does not occur, and the vibration is linear (= vibrates).
In the above embodiment, the flat diaphragm 9 has a thickness of 6-. However, the thickness is
not limited to 6-1 =, and it is preferable that the thickness is 2 (two thick) in order to prevent
lateral vibration. . Further, in the above embodiment, although the frame 3 (= the fixed plate 10
(the damping agent 10a, 10b supporting the flat plate is fixed via the fixed sub frame 11), the
above sub frame 11 is fixed. The damping agents 10a and 10b described above may be directly
fixed to the frame 3 (two may be fixed). According to the present invention, as described above, a
speaker device arc provided with a flat diaphragm to which a voice coil bobbin supported by a
spider is fixed; in the vicinity of the outer periphery of the flat diaphragm (= side plane 1: Each
applied damping agent (from 2 to support the flat plate diaphragm, high frequency
characteristics C 2 adversely affect the conventional vibration i 7 I: can prevent divided vibration
by the plate plate, and the amplitude of the plate diaphragm is Even when it is large, there is an
effect that it is possible to vibrate the flat plate without causing lateral vibration of the flat plate
diaphragm.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIGS. 2 and
6 are cross-sectional views of different conventional speaker devices.
6: frame, 4: voice coil bobbin, 5: spider, 9: flat diaphragm, 10a, 10b: damping agent. In FIG. 1, the
same reference numerals denote the same or corresponding parts. Agent Patent Attorney
Masashi Sato Year 1: Figure 4: Frame 4: Nails 5: Spider 9: Scissors and Gravity Roots 10a, 10b:
Dumping Agent Figure 2: Figure 3
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