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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a conventional trumpet
speaker drive unit, and FIG. 2 is an explanatory view of a trumpet speaker drive unit according to
the present invention. 2 is a magnet cup, 6 is a voice coil, 12 ° 12a is a terminal, 15 is a
diamond frame, 16 ° 16a is a lead wire, and 17 is an insulating resin.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a trumpet speaker
in which corrosion of a voice coil portion is prevented and reliability is improved as the voice coil
portion is stepped and closed. FIG. 1 shows a conventional trumpet speaker drive unit, and is an
explanatory view of a state t in which the front case 1 is removed from the magnet cup 2
according to the horn portion and the O 黴 itc portion. The diamond frame protection plate 3 is
fixed to the front case l and the lead connection terminal 4 is attached to the front case l. Further,
the coil coil 6 is fixed to the diamond frame 5 interposed between the front case 1 and the
magnetic force 2 and the lead M of the coil coil 6 is soldered to the inner end of the terminal 4 .
Front case 1. The diamond frame holding plate 31 and the diamond frame 5 tw N chair coil 6 are
integrally attached to the magnet canon 2 through the base M7 to constitute a drive unit. 8
shows permanent bleeding in the eyelid view. However, in the drive unit described above, the
fixing between the diamond frame 5 and the front case 1 is only the bonding force between the
lead wire and the terminal 4, and the diamond frame 5 and the diamond frame retaining plate 3.
There is little dense layering with the front case l, and it is possible to infiltrate water etc., and
rust 7 occurs. Furthermore, because the lead edge is short due to its structure and there is no
escape against the movable movement of the diamond frame 5, it is synergistically disconnected!
There is a drawback to speeding up il. Most of the non-S in current driver units are due to the
above (2) 1J reasons. The present invention solves the above-mentioned drawbacks, and makes
the space which is recessed by the diamond frame and the magnet cup completely waterproof,
and makes it possible to take out the Lee P string in a watertight state from the magnet cutaway
side, Alternatively, it can be used for a long time even in the salt damage area. Hereinafter, an
embodiment of the present invention will be described with reference to FIG. The same reference
numerals are given to elements having the same configuration 9M as in FIG. 1 in FIG. 1・1.
Magnet force, a pair of terminal holes 9.9a co J in the bottom of the cup 2,! ヶ、ち1. Fix the
iron pedestal 11 provided with □ 0 ー 7 、 よ 1 . Further, the terminal 12.12m is fixed in a
watertight manner to the terminal hole 9.91 by the insulating resin 17. On the lower surface of
the diamond frame 15 formed with a required number of concentric annular ridges 14f around
the central spherical surface s13, the disc 1 is positioned at the edge of the spherical portion 13
and the disc 1 is ij! Wear j1. That? 1. Connect one end of the coiled leads 16 and 16m to the
chair coil 6, and connect the other end to the terminal (3). :.
Next, the diamond frame 15 is brought into close contact with the pedestal 11 to connect it to
the magnet 12 '. 2 Close the opening and cover the front case with the tire frame protection plate
3. Since it is constituted as mentioned above, the space which carries out concave line by
magnetic self-cutting blade 2 and diamond frame 15 will be in a closed state, and a connecting
part of dice coil @ 6 and lead edge 16.16a will not contact open air. Therefore, there is no
corrosion even under adverse circumstances. In addition, since the leads [1116 and 16m are
coiled, they can sufficiently follow the distance change of one end 8 as well, and further by
forming the annular ridge 14 in the Jilt circumference of the spherical portion 13, the diamond
frame 150 The large amplitude can be * '4. In addition, this invention is not limited to the abovementioned Example, attaching an electron to the magnet cup side ,! Bring salt form O to J-t'IM,
form of 皺 '1 t K j! It goes without saying that various changes can be made without departing
from the scope of the present invention, such as doing. As described above, according to the
present invention, corrosion of the middle coil portion, the lead edge, and the connection portion
can be prevented (4) 9 · IC, and the life can be extended and the reliability can be improved.
Because the amplitude is equal, (11) The wheel with the maximum output is large and strong
against the instantaneous output, (11) The low-range characteristics are improved1 (Ill is not this
kind of driver unit but it can be 50W or more. Even in a unified manner, they exert superior
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