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■ Speaker 特 願 Japanese Patent Application No. 45-97999 [Phase] Application No. 45 (1970)
November 7 @ inventor state Nogo Ms. Hoki Sawa city 16 16 applicants Mogami Electric Co., Ltd.
Mogami-gun, Yamagata prefecture 1 [phase] agent patent attorney Yoshio Inamoto of Omachi
Shinji character Shiono 954
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional view showing the
positional relationship between a cone, an edge and a frame according to the present invention. 2
and 3 are cross-sectional views schematically showing the structural relationship between the
edge and the cone paper.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cone type
speaker, and more particularly to a cone type speaker having an improved edge portion.
Conventionally, the lowest resonance frequency F of cone paper. It is known to reduce the
thickness of the edge and to use a flexible material for the edge as a powerful means to lower the
temperature. However, if the edge is made extremely thin, air will permeate, resulting in a
reduction in the acoustic output of the speaker. Also, if an extremely soft material is used at the
edge, the cone paper can not be held in the proper position, and the distortion of the sound
output of the speaker will be increased. The present invention solves the problems associated
with such edges, the first object of which is the lowest resonance frequency F of corn paper. The
point is to obtain low-pass custom-made good speakers. A second object of the present invention
is to obtain a speaker which prevents the transmission of air at the edge portion and prevents the
reduction of the sound output particularly in the low frequency range. [111111] The present
invention will be described in detail with reference to the drawings. In FIG. 1, the opening
peripheral edge of the cone paper 1 is held by an edge 2. The outer peripheral portion of the
edge 2 is held and fixed by the outer peripheral flat portion of the frame 3 and the patch 4. The
construction of the corn paper 1 and edge 2 will now be described in more detail with reference
to FIGS. The edge 2 is made of a flexible thin paper 5 laminated with a synthetic resin layer 6
such as polyethylene, vinyl chloride, acrylic or the like which blocks air permeability, and an edge
portion 7 which is thinner than the cone portion integral with the cone portion. Configured Fig. 2
shows the case where the edge 2 of the cone paper 10 is thinly thin, and the flexible thin paper 5
laminated with the synthetic resin layer 6 is the lower surface, and heat compression is integrally
made to form the edge 2; In this case, the flexible thin paper 5 in the figure is disposed on the
upper surface of the corn paper 1. As described above, according to the present invention, the
edge portion can be made extremely thin, and a certain degree of strength and air impermeability
can be obtained by laminating, thereby improving the custom-designed sound output of the
speaker especially in the low range. can do. For example, in the case of experiment with cone
paper having an outer diameter of 92 m, F of cone paper when using a conventional normal
edge. The limit was about 170 H 2, but according to the present invention, it could be as low as
about 130 H 2. In addition, since the laminated surface has a function as an adhesive, bonding
between a plurality of thin portions or between thin paper and cone paper can be performed by
heat and pressure bonding, and edge formation can be performed simultaneously, and the
speaker The manufacturing process can be simplified.
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