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■ Support system for speaker diaphragm ■ Japanese Patent Application No. 45-67067 [phase]
Application No. 45 (1970) July 30 @ inventor Sueyoshi Koji Nishihashi-ku Osaka 2 22 3 Lux Co.,
Ltd. 出 願 applicant 22 3 [present] agent patent attorneys of Nishihashi Ward, Osaka, Osaka City
Yoshiyuki Shibata
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional plan view when the present
invention is applied to a speaker for bass, FIG. 2 is a partially cut-away plan view of the main part
of the same, and FIG. 3 is a cross-section of a conventional mounting structure A top view is
Detailed Description of the Invention The role of the support device of the diaphragm of the
speaker is to maintain the center of the vibration of the voice coil as well as the diaphragm,
adjust the stiffness, and control effects, but it is a low-frequency speaker with low distortion and
good sound quality. The ideal condition is that the linearity for large amplitude is good, that the
vibration in the front-rear direction is symmetrical, that the restraint force in the direction
perpendicular to the vibration direction is large, the mass of the damper itself be small, and that
there is no resonance. , Easy to make shape, small size, etc. At present, the most frequently used
support structure is to fix the outer periphery of a support which is bent to a concentric curved
or wave-like cross section fixed to the base peripheral edge of the diaphragm a as shown in FIG.
However, there is no relief for distortion in the circumferential direction that occurs in the
diaphragm, and one with a small width 1 can not obtain a large amplitude and can not obtain
reasonably good linear vibration. In order to enable a large amplitude, the width 1 must be made
longer. In this case, the movement near the center of width 1 is free and resonance is likely to
occur, the mass is also increased, and the restraining force in the direction perpendicular to the
vibration is also reduced. The present invention is an improvement of the above-mentioned
drawbacks of the support structure, and as shown in FIGS. 1 and 2, the radial attachment of
elastic members which bend in opposite directions to the outer periphery of the base of the
diaphragm 1 The pieces 2 and 3 are alternately arranged in an annular arrangement, and the
outer ends thereof are fixed to the support frame 4 by adhesion or the like. In the figure, 5
indicates a voice coil and 6 and 7 indicate magnetic poles. In the present invention, the mounting
pieces 2 and 3 having the above-mentioned configuration and arranged in the opposite direction
are alternately arranged, and the adjacent mounting pieces 2 and 3 or 3 separated in the same
direction are separated. Since large vibrations in the front-rear direction can be reasonably
tolerated and therefore the width can be reduced, the restraint in the direction perpendicular to
the vibration direction is also large, the linearity, the front-rear symmetry in the vibration
direction are also good, and the flexibility for circular distortion is also possible. Since the
mounting pieces 2 and 3 accept a large vibration with a relatively small width (radial direction)
without difficulty, the mounting structure can be made compact and lightweight. Although the
above embodiment shows the case where it is applied to the base of the low frequency speaker, it
can be similarly applied to the edge of the outer periphery of the diaphragm, the edge of the
middle high and low frequency sound speaker, and the like.
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