JPH02148582

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DESCRIPTION JPH02148582
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
connecting structure of lead wires in a sound 9 device, particularly a cartridge or the like. (Prior
Art) Cartridges are attached directly to the ton arm, and a shell is attached to the ton arm
removably with the cartridge attached to the hend shell. For this reason, in the conventional
cartridge, a plurality of lead terminals are made to project on the rear end surface of the
cartridge, and chips attached to the respective lead terminals are used. This chip is provided on
one side with a substantially triangular or cylindrical connecting portion covered with the lead
terminal, and on the other side is provided with a caulking portion for caulking the lead wire. The
coating is peeled off, and the peeled lead wire is bundled and placed on the caulking portion of
the chip, and the caulking tool separately prepared is pressed and caulked so as to sandwich the
lead wire. Then, a connection structure in which the connection portion of the chip attached to
the lead wire is attached to the lead terminal of the cartridge is performed. (Problems to be
Solved by the Invention) In the conventional lead wire connection structure, in order to crimp the
chip to the lead wire, it is necessary to prepare a separate chip and to prepare a tool for caulking.
In the case of adhesion connection to the lead terminal, there is a disadvantage that, for example,
loosening occurs and noise is generated in the trace of the cartridge. The present invention has
been made in view of the above circumstances, and the object of the present invention is to use a
connecting bracket such as a chip for attaching a lead wire to a cartridge, and therefore to reduce
the number of parts and a tool for caulking. It is an object of the present invention to reduce the
cost due to the nonuse of the lead wire and to provide a lead wire connection structure which
prevents the generation of noise due to the looseness of the connection point. (Means for Solving
the Problems) In order to achieve the above object, the connection structure of a lead according
to the present invention is: A plurality of concavo-convex portions provided in the case main
body, and a plurality of convex and concave portions engaged with the concavo-convex portion
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in the case lid part fitted to the case main body are provided. A contact portion is provided to
conduct the output, and a lead wire from the outside is brought into contact with the contact
portion to fit the case lid portion to the case main body, whereby the convex portion presses the
lead wire to the contact portion. To conduct electricity electrically. (Function) The lead wire
connection structure configured as described above does not use a chip for terminal connection
on the lead wire side, removes the coating on the tip of the lead wire, and the inside of the recess
of the case body and case lid The lead wire placed in the recess is a convex portion provided on
the other side, and is pressed against the contact portion in the concave portion and electrically
conducted. Also, since the lead wire and the contact portion do not come off unless the case lid is
removed, there is no slack, and an extremely good connection can be made.
(First Embodiment) The first embodiment of the present invention will be described below with
reference to FIGS. In the first embodiment, a recess is provided on the case body side and a
protrusion is provided on the case lid. FIG. 1 shows the cartridge case in which the lead wire
connection structure of the present invention is used. In FIG. 1, 1 indicates the main body of the
cartridge case and the side to be connected to a tone arm (not shown). A power generation
mechanism such as a moving magnet, moving coil, moving iron, etc. is incorporated in the case
main body 1, and in these power generation mechanisms, a canner lever provided with a stylus
tip that vibrates following a sound groove such as a record It is an arrangement. In the case main
body 1 of the cartridge in which the power generation mechanism is installed, a plurality of
grooves 3 for guiding the lead wire are provided on the contact surface with the case lid 2 fitted
to the case main body l. The groove 3 is inserted from the outside of the case body 1 to the inner
surface, and a recess 4 is provided in the middle of the groove 3 in the direction perpendicular to
the groove 3. The concave portions 4 are formed so as to narrow on the bottom side on the
corresponding surface sides, and the cross-sectional shape is an inverted trapezoidal shape. And
this recessed part 4 is provided independently for every one groove part 3, and it is formed so
that it may not cross ¦ intersect an adjacent recessed part. The groove 3a communicating with
the inside of the case main body 1 from the recess 4 is formed slightly deeper and has a step-like
shape (see FIG. 2). The contact portion 5 formed of a metal plate shown in FIG. 1B is mounted in
the recess 4. The contact portion 5 is formed in a U-shaped cross section, and the side surface
corresponding to the groove portion 3 is provided with a notch 5a equal to the depth of the
groove portion 3. 5b is extended. When the contact portion 5 is mounted in the recess 4 as
shown in FIG. 2, the lead piece 5 b is disposed so as to protrude inside the case main body 1. The
lead piece from the ith tn mounted in the case main body 1 is connected to the lead piece 5b by
soldering or the like. On the other hand, the case lid 2 fitted to the case main body 1 is provided
with a trapezoidal convex portion 6 fitted to the recess 4 as shown in FIG. 1 and FIG. When the
portion 2 is fitted to the case main body l, the convex portion 6 is fitted and pressure-welded into
the contact portion 5 mounted in the concave portion 4. In the configuration described above, as
shown in FIG. 3, the coating of the tip of the lead wire 7 is removed, and the portion is removed
from the cover of the case main body 1 and is transferred onto the notch 5a of the contact
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portion 5. When the case lid 2 is fitted to the case body 1, the exposed portion of the lead wire 7
is pushed by the convex portion 6 of the case lid 2 and bent while being held by the inner side of
the contact portion 5. It is pressed and electrically conducted.
And if this case cover part 2 is removed, the lead wire 7 can be easily removed from the contact
part 5. Of course, the lead wire 7 may be soldered and fixed in advance. Further, although the
above description has described the connection structure of three terminals, in the case of four
terminals, the same connection should be made by adding the number of terminals. Can. Second
Embodiment In the second embodiment of the present invention, asperities are provided on the
case body and the case lid respectively, which will be described with reference to FIG. In the
figure, reference numeral 8 denotes a main body of the cartridge case, which shows the side of
connection to a tone arm (not shown). A power generation mechanism such as a moving magnet
moving coil, moving iron, etc. is installed in the case main body 8, and these power generation
mechanisms are provided with a cantilever provided with a stylus tip that vibrates following a
sound groove such as a record. . In the case main body 8 of the cartridge that houses the power
generation mechanism, a plurality of grooves 10 for guiding the lead wire are provided on the
contact surface with the case lid 9 that is fitted to the case main body 8. The groove portion IO is
inserted from the outside of the case main body 8 to the inner side surface, and in the middle
thereof, four portions 11 are provided in the direction perpendicular to the groove portion 10.
The recesses 11 are formed narrowly on the surface side or the bottom side corresponding to
each other, and the cross-sectional shape is an inverted trapezoidal shape. And this recessed part
11 is provided independently for every one groove part 10, and it forms so that it may not cross
¦ intersect an adjacent recessed part. On the other hand, the case lid 9 fitted to the case body 8
also has a groove 10 'similar to the groove 10 at a shifted position not coincident with the recess
11 of the case body 8, and the case 10 in the middle of this groove 10 °. A plurality of recessed
portions 11 'are provided at positions corresponding to the recessed portions 11 of the main
body 8, and the recessed portions 11 of the case main body 8 and the recessed portions 11 of
the case lid 9 are mutually offset and provided so as not to contact with each other. is there. On
the contact surfaces of the case body 8 and the case lid 9 adjacent to these recesses 11.11 ',
trapezoidal protrusions 12 and 12' are fitted to the recesses 11 or 11 ° corresponding to each
other. Are respectively provided, and by fitting the case lid 9 to the case body 8 by fitting, the
respective concave portions 11 and the convex portions 12 are fitted in the corresponding
convex portions 12 ° and concave portions 11 ′. It has become. The contact portion 5 of the
metal plate shown in FIG. 1 (b) of the first embodiment is mounted in each of the recessed
portions 11 and 11 ', and the coating on the tip portion of the lead wire is removed. When the
case body 8 and the case cover 9 are fitted together, the convex portions 12 and 12 ° can press
and connect the lead wire to the contact portion 5.
The configuration of the recessed portion 4.11.11 'described above is not limited to the direction
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perpendicular to the groove 3.1.101', and the same function can be performed even if provided
along the direction of the groove 3.10 ° 10 °. It is. Also, the attachment of the case lid 2.9 to
the case main body 1.8 is not limited to fitting, and may be screwing with a screw. The above
description has been made of the cartridge case, but the case main body and this are adhered It
can be widely used also as a connection structure of lead wires of an electric device from the case
lid. (Effects of the Invention) As described above, the lead wire connection structure of the
present invention engages the uneven portions with the plurality of uneven portions provided in
the case main body and the case lid portion fitted to the case main body. A plurality of
projections and depressions, and in the plurality of depressions a contact portion for conducting
human output into the case main body is provided, a lead wire from the outside is brought into
contact with the contact portion, and the case cover is By fitting the lead wire to the contact
portion by making the case body fit, the lead wire is brought into electrical contact with the
contact portion, so that the case body without using a connection fitting such as a chip at the tip
of the lead wire. The cost can be reduced by reducing the number of parts and not using the
caulking tool, and since there is no loosening of the connection point, it is possible to prevent
generation of noise and the like.
[0002]
Brief description of the drawings
[0003]
1 to 3 show the first embodiment of the present invention, and FIG. 2 is a cross-sectional view
taken along the first line W, and FIG. 3 is a lead wire connection (a) 1 ° case body 2 ° case lid
Section 4 ° 11 ° · 4 · contact section 6 ° 12 · · · · · · lead section Figure (one other) Procedure
main city ■ Mi book (spontaneous) Figure 1 the display of the case 299.9882, connection
structure of lead wire 3 of the invention, relation to the case of person making correction
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