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DESCRIPTION JPS59139793

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DESCRIPTION JPS59139793
[0001]
The present invention provides a speaker terminal which is free from insulation failure even
when it is directly attached to a speaker metal frame and is easy to install on the metal frame.
FIG. 1 is a cross-sectional view of a commonly used speaker, which has a top plate 1. The voice
coil 4 is held by the damper 6 in a suspended state by the damper 6 in the magnetic gap of the
magnetic circuit formed by the magneft 2 ° pole piece attached plate 3. The neck portion of the
cone-shaped diaphragm etc. is joined to the coil bobbin 7 wound with the voice coil 40, and the
outer diameter side is fixed to the metal frame 9 together with the gasket 10 via the edge 8.
Further, a so-called gold wire 12 which is a conductive lead wire is connected to the speaker
terminal 11 attached to the metal frame 9, and serves as an electrical connection terminal
portion between an external device and the speaker. On the other hand, the lead wires at both
ends of the voice coil 4 are pulled upward along the coil bobbin 7 and connected to the clamp 13
provided on the middle part of the cone-shaped diaphragm 6, and the gold wire 12 is drawn from
the clamp 13. And electrically connected to the speaker terminal 11. A dust proof 14 is provided
at the center of the cone-shaped diaphragm 6 so that dust does not enter the inside of the
speaker. In the speaker in which the speaker terminal 11 is directly installed on the metal frame
9 as in the above configuration and the gold wire 12 connected to the voice coil is connected to
the speaker terminal 11, the insulation failure occurs at the speaker terminal 11. Was apt to
occur. Hereinafter, the conventional speaker terminal will be described, and the problems will be
described. Figures 2a, b, 3a, b and 4a. The reference numeral b denotes a component of the
conventional speaker terminal, 16 denotes a terminal formed by integrally forming the hollow
body 16a, the flat plate portion 16b and the terminal portion 15c, 16 denotes an insulating plate
having a hole 16a at the center, and 17 denotes It is an insulating plate having a hole 1 '7 a at
the center. The procedure for fixing the terminal composed of these parts to the metallic frame 9
will be described with reference to FIGS. 16 and 6. The hole 16a of the insulating plate 16 is
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fitted to the hollow body 15a of the fitting terminal 15. In this fitted state, the hollow body 16a
of the terminal 16 is inserted through the through holes 9a formed in the metal frame 9, and the
tip of the hollow body 15a is made to project from the through hole 9a. The hole 17a of the
other insulating plate 1 is fitted into the protruding hollow body 15a.
Next, the hollow body 15a of the bolt terminal 16 is spread by the punch 18 and folded, as
shown in FIG. 6, the bolt terminal 16 with the insulating plates 16 and 17 on both sides of the
metal frame 9 sandwiched. Is fixed to the metal frame 9. In the work of attaching the abovementioned speaker terminal to the metallic frame 9, the work of inserting the insulating plates
16 and 17 is carried out twice each in total, and the work is carried out on both sides of the
metal frame 90. Very bad. Obviously, when the speaker terminal having the above configuration
is used, no insulating plate intervenes on the side surface in the through hole 9a of the metal
frame 9, so as shown in FIG. If the positions of the through holes 9a drilled in the frame 9 do not
coincide with the center lines 9b of the through holes 9a, the metal frame 9 contacts the fitting
terminals 15 on the side surfaces in the through holes 9a, resulting in insulation failure. The
present invention has been made to eliminate the above-mentioned drawbacks, and it provides a
speaker terminal which can be installed easily in a metal frame without fear of insulation failure
even when installed in a metal frame. The embodiment of the present invention will be described
in detail with reference to the drawings. Figs. 8a, b and 9a, bij Fig. 10a, b show sectional views of
the components of the speaker terminal according to an embodiment of the present invention.
That is, the speaker terminal has a hollow body 19b having a through hole 19a inside, a flat plate
portion 19c formed at a right angle with the hollow body 19b at one end of the hollow body 19b,
and an angle from the flat plate portion 19c. An insulating molded body 20 in which a fitting
terminal 19 integrally formed with a projecting terminal portion 19 d wraps the entire outer
peripheral surface of the hollow body 19 b and covers one surface of the flat plate portion 19 c
on the hollow body 19 b side It is. The insulating molded body 20 is composed of a hollow
portion 20a fitted to the entire outer periphery of the hollow body 19b in the solder terminal 19,
and a flat portion 20b having a dog-like area from the lower surface of the flat portion 19c in the
screw terminal 19 as well. The material is made of a flexible insulator such as rubber. Next, the
procedure for placing the above-mentioned speaker terminal on the metal frame 9 will be
described with reference to FIGS. 10 to 12. The insulating molded body 20 is fitted on the outer
peripheral portion of the hollow body 19b of the shorting terminal 19. At the same time, as
shown in FIGS. 10 a and 10 b, the outer peripheral surface of the hollow body 19 b and the lower
surface of the flat plate portion 19 C are covered with the insulating molded body 20. Next, as
shown in FIG. 11 of the sweetened state, the hollow body 19b of the screw terminal 19 is
inserted into the metal frame 90 through hole 9a, and the hollow body 19b is made to project
from the through hole 9a. .
By fully inserting the tip of punch 18 into the through hole 19a of the solder terminal 19 and
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folding the hollow body 19b, as shown in FIG. 12, the entire surface opposite to the metal frame
9 and the screw terminal 19 is entirely. It is isolated by the insulating molded body 20 and the
insulation is maintained. If the speaker terminal of the present invention is used, the work of
fitting the insulating molded body to the fitting terminal can be done only once, and the number
of steps for installation on a metal frame can be reduced. Since the metal frame is completely
covered with the opposing surface of the terminal or the insulating molded body, the metal frame
and the terminal do not come in contact with each other to cause insulation failure of the
speaker. When the through holes 9a drilled in the metal frame 9 are circular, the shape of the
screw terminal 19 is cylindrical and the insulating molded body 20 is also cylindrical as shown in
FIGS. 13a and 13b. You should do it. Further, as shown in FIGS. 14a and 14b, when the outer
peripheral surface of the insulating molded body 20 is tapered so as to narrow downward, the
insulating molded body 20 is inserted into the hole of the metal frame, and FIG. As shown in the
figure, when the inner side surface of the insulating molded body 2Q is completely tapered down,
the hollow body of the -1 set terminal is broken vt 8 and the insulating molded body is pressed
against the metal frame in the process of pressing the insulating molded body. Cracking can be
prevented. As described above, the speaker terminal of the present invention has a simple
configuration and an excellent effect, and is of great practical value.
[0002]
Brief description of the drawings
[0003]
1 is a cross-sectional view of a speaker having a metal frame, and FIGS. 2a, b, 3a, 3b and 4a, 4b
are front cross-sectional views and plan views of components of a conventional speaker terminal.
5 and 6 are diagrams for explaining the procedure for attaching the terminal to a metal frame,
FIG. 7 is a front sectional view of the terminal in which an insulation failure has occurred, and
FIGS. 10a and 10b are a front sectional view and a plan view of component parts of a speaker
terminal according to an embodiment of the present invention, FIGS. 10a and 10b are a front
sectional view and a plan view of the same terminal, and FIGS. Figures for explaining the
procedure for attaching the terminal to the metal frame, Figures 13a, b to 15a and 15b are a
plan view and a portion showing another embodiment of the insulating molded body which is a
component of the same terminal FIG.
19 ...... eyelet terminals, 19a ...... through hole, 19b ...... hollow body, 19c ...... flat portion, 19d · · ·
terminal portions, 20, ----- insulating molded body, 20 a · · · · · · hollow portion, 20b · · · · · · flat
plate portion. Name of Agent Attorney Nakao Toshio and 1 other person% 1) Fig. 6 Fig. 7 Fig. 8 8
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1 1 υ Fig. 11 Fig. 12 Fig. 13 Fig. 14
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