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JPS5076823

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DESCRIPTION JPS5076823
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal cross-sectional view of a
conventional dome-shaped speaker, FIG. 2 is a longitudinal cross-sectional view of the diaphragm
under the dome-shaped nupika of the present invention, and FIG. 3 is a diaphragm of the present
invention Fig. 4 shows a frequency-distortion-rate characteristic of a dome-shaped speaker
incorporating the diaphragm according to the present invention, in which 1 is a diaphragm, 2 is a
peripheral edge of the core, and 3 is a frequency characteristic diagram of the dome-shaped
speaker incorporating Korge Kyun near the top. あらわす。 In the drawings, the same reference
numerals indicate the same or corresponding parts. v,1t! A-51-Japanese Utility Model
Application Publication No. 50-76823 (2). / 1 I \ / /)) 0 dB "101-# 2 #-4 # # 2 He pH% l # 1 ##聾 4 屯 \ \-\ 翫 \ \ 1 \ \ ハ \ < ■ ~ \ ゝ 9-'' ''-ζ / / \, 〆 \ 2 6 6f1 * ee 2 1 1 1-4 311sll! LHz 1 # #
# # # 亭-52-
DETAILED DESCRIPTION OF THE INVENTION This invention relates to the improvement of the
diaphragm of a dome shaped speaker. Conventionally, the diaphragm (1) used for the domeshaped speaker is only the dome-shaped one as shown in FIG. 1, and when assembling the domeshaped speaker, the damper wedge supporting the diaphragm is adhered to the peripheral
portion It must be fixed from K and there is a bothersome defect in operation. In addition, in the
case of (1) i dome-shaped speaker assembled in this manner, the supporting of the vibrating
portion causes a rolling phenomenon due to one peripheral portion, and furthermore, the
vibrating portion plate is dome-shaped to split resonance at the top of the diaphragm. The
resonance peak shown by the dotted line in Fig. 3 is generated, and furthermore, the strain rate
caused by the nonlinearity of the damper is divided by the dotted line in Fig. 4 due to the
difference in compliance depending on the vibration direction of a part of the damper supporting
the diaphragm. As shown in the figure, there is a drawback that the sound quality and frequency
characteristics are more adversely affected than K such as O. The present invention seeks to
provide a diaphragm of a dome-shaped speaker which has improved such a defect. An
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embodiment of a diaphragm according to the present invention will be described below with
reference to the drawings. In FIG. 2, the mouth) is a diaphragm formed in a dome shape, (3) is an
annular corrugation shaped into one body at the peripheral portion of the diaphragm, and (3) is
the above-mentioned m-ex. The top of the dome of the plate (annular col-7 sum positive
formation formed near + I +, and the peripheral part of the corgage funnel (2) (2) has a
symmetrical shape as shown in FIG. 2) 6. th and □ u and A1. 3. Gel polarization: More than
Vm + 21, + s + ti diaphragm (1) is incorporated in the dome-shaped speaker so as not to disturb
the vibration when it is vibrated. Next, when assembling the diaphragm thus formed into a domeshaped speaker, the outer peripheral end (4) of the peripheral portion corrugation (3) is fixed to
a plate (not shown), and If it is fixed to the top N (5+ not shown in the figure) surrounded by a
single letter lamp (3), it is better to correct it. For this reason, in the prior art, fixing of the outer
periphery of the diaphragm fi + requires two strokes of the peripheral portion of the diaphragm,
the inner peripheral edge of the damper, the outer periphery of the damper, and the plate It
became a process and became easy on the operation. Next, the operation of the dome-shaped
speaker incorporating the diaphragm of the present invention will be described. When the
vibration 1m plate (1) makes one action by the electric signal, the diaphragm is connected with
the outside station end (4)! Since the fill (61 is fixed to the fixed portion and the l-character
corrector), it vibrates with the corrugation (3) at the peripheral portion and the corrugation
around the l-part (3) l part as a fulcrum.
Since the diaphragm is supported at two points like this, no rolling phenomenon occurs even if
the diaphragm vibrates. Also, since the dome-shaped hot portion tel does not vibrate, the
resonance peak due to the conventional 4 '□ divided resonance can be removed as shown by the
solid line in FIG. Furthermore, due to the symmetrical shapes of the peripheral part no: y'l-l (2)
and Hs near s corgage soda / letter i, t (3)), diaphragm (1) When it vibrates back and forth, the
differences in the compliance of each corrugation are canceled and the displacement before and
after the same driving force is made the same to make the linearity better, as shown by the solid
line in FIG. It could be reduced. As described above, the diaphragm of the dome-shaped speaker
according to the present invention is simple in work when assembling the dome-shaped speaker,
and also prevents the occurrence of the rolling phenomenon in sound quality, and the division
occurring in the dome-shaped buttocks It is possible to eliminate the resonance peak due to
resonance, and also to make the same compliance before and after the damper; The distortion
factor can be made good, such as k) acoustically good 0
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