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DESCRIPTION JPS55179492

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DESCRIPTION JPS55179492
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a speaker, and FIG. 2 is an
exploded perspective view of the speaker of the present invention. 1 is a frame, 4 is an input
terminal, and 9 is an identification mark.
DETAILED DESCRIPTION OF THE INVENTION This invention relates to the structure of the frame
of the speaker, especially in a small diameter speaker, in a frame in which two signal input
terminals are arranged in a straight line, if it is easy to insert a voice coil to be connected to the
input terminal. The purpose is to hold down. A small diameter speaker such as a tweeter is
shown in Fig. 1/2? There is one that has a similar structure. That is, seven flanges 3 having the
speaker mounting holes 2 are formed 180 ° apart at the peripheral edge of the speaker frame l,
and two input terminals 4 are fixed on a line connecting the centers of the flanges 3. Are
connected to the winding start 5a and the winding end 5b of the voice coil 5, respectively. The
top of the diaphragm 6 serving as an acoustic radiation surface is fixed to the coil bobbin 7 on
which the voice coil 5 is wound, and the peripheral portion is fixed to the outer peripheral edge
of the frame 1. The coil bobbin 7 is supported by a damper 9. On the other hand, at the time of
assembling the sbeaker, the winding end of the voice coil 5 normally connects the winding start
end 5a to the O input terminal 4 and connects the winding end 5b to the 入 力 input terminal 4.
Therefore, in the operation of arranging the voice coil 5 in the magnetic gap, the positions of the
two winding ends must be inserted so as to be the three connection arrangements. However, the
input terminal is marked with ■ or O for connecting to the amplifier on the outer surface of the
speaker frame l (for example, the color of the spacer of the input terminal is different). Since the
frame 1 has a symmetrical shape, the frame 1 has to be turned over each time to identify the
polarity, which is inconvenient and at the same time prone to an insertion error. So, this
invention solves the said fault by providing an identification mark in the inner surface of the
flame | frame 1, and demonstrates it in detail about FIG. 2 below. (The same reference numerals
as in FIG. 1 denote the same 1 @ in FIG. 2) -4- In FIG. 2, 1 is a frame of the same shape as that of
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FIG. 1, but the identification mark 9 is on the side of the frame l on either side of the straight line
connecting the input terminals 4.4. It is an arrangement. Therefore, since the input terminal 4.4
of 40 40 can be identified with reference to the identification mark 9, the voice coil 5 may be
inserted so that the winding end wires 5a, 5b corresponding to each terminal 4.4 are located.
Therefore, as in the prior art, it is necessary to turn over the frame 1 each time (an operation can
be performed in a very short time, and an insertion error can be prevented.
Various methods can be considered for the identification mark 9, but if the small projections are
simultaneously formed as the identification mark when molding the frame 1, it is extremely
simple without increasing the number of steps and parts.
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