JPH02148582A - Connection structure of lead - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to reduce cost by providing irregularities on a case, having a lead contacted with a connection point, and by fitting a lid of the case to a body so as to have the lead pressed and conducted to the connection point by the convexity. CONSTITUTION:On an abutting surface of a case lid 2 that is to be fitted to a case body, grooves 3 are provided to guide a lead, and a concavity 4 is provided perpendicular to the grooves 3. A connection part 5 is installed in the concavity 4, while the lead part is connected with a lead piece 5b. A trapezoid convexity 6 to which the concavity 4 is fitted is provided on the lid 2, so as to be fitted and welded by pressure in the connection part 5 that is installed in the concavity 4. A lead 7 is put on a notched part 5a in the part where the coating of an edge thereof is removed, and the lid 2 is fitted to a body 1. Then, being pushed by the convexity 6 and flexible, the exposed part of the lead 7 is sandwiched by the connection part 5, and is pressed and conducted electrically by the convexity 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a connection structure for lead wires in audio equipment, particularly in cartridges and the like.

(Prior Art) The cartridge has been attached directly to the ton arm, and the cartridge has been attached to the hend shell, and the herad shell has been detachably attached to the ton arm.

For this reason, in conventional cartridges, a plurality of lead terminals are projected from the rear end face of the cartridge, and chips are attached to each of the lead terminals. This chip has a connection part with a generally triangular or cylindrical cross section covered by the lead terminal on one side, and a caulking part for caulking the lead wire on the other side. The coating was peeled off, and the lead wires from which the coating was removed were bundled and placed on the caulking part of the chip, and the lead wires were pressed and caulked using a separately prepared caulking tool so as to sandwich the lead wires. A connection structure has been adopted in which the connection portion of the chip attached to the lead wire is attached to the lead terminal of the cartridge.

(Problems to be Solved by the Invention) In the conventional lead wire connection structure, in order to caulk the chip to the lead wire, it is necessary to prepare the chip separately and a tool for caulking. Looseness may occur in the adhesive connection to the lead terminal.
There were drawbacks such as generation of noise during cartridge tracing.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to attach lead wires to cartridges without using connection fittings such as chips, thereby reducing the number of parts and crimping tools. The purpose of the present invention is to provide a lead wire connection structure that reduces costs by not using lead wires, and prevents the generation of noise due to loose connections.

(Means for Solving the Problems) In order to achieve the above object, the lead wire connection structure of the present invention is as follows: A case body is provided with a plurality of concave and convex portions, and a case lid fitted to the case body is provided with a plurality of concave and convex portions that engage with the concave and convex portions, and the case body is provided with a plurality of concave and convex portions that are inserted into the case body into the plurality of concave portions. A contact part is provided to conduct the output, and by bringing a lead wire from the outside into contact with the contact part and fitting the case lid part to the case body, the convex part presses the lead wire to the contact part. It is characterized in that it is electrically conductive.

(Function) The lead wire connection structure configured as described above does not require a terminal connection tip on the lead wire side, and the lead wire is removed from the tip of the lead wire and inserted into the recess of the case body and case lid. By simply fitting the case body 6 and the case lid, the lead wire inserted into the recess is pressed against the contact part in the recess by the protrusion provided on the other side, and is electrically conductive. Moreover, since the lead wire and the contact part cannot be removed without removing the case lid, there is no loosening, and an extremely good connection can be achieved.

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In this first embodiment, a concave portion is provided on the case body side and a convex portion is provided on the case lid portion.

FIG. 1 shows a cartridge case in which the lead wire connection structure of the present invention is used. In FIG. 1, l indicates the main body of the cartridge case, which is connected to a tone arm (not shown). Inside the case body 1 are power generation mechanisms such as moving magnets, moving coils, moving irons, etc. These power generation mechanisms include a cannalever equipped with a stylus tip that vibrates following the sound grooves of records, etc. It is a provision. In a case body 1 of a cartridge in which this power generation mechanism is housed, a plurality of grooves 3 for guiding lead wires are provided on the contact surface with a case lid 2 fitted into the case body 1. This groove 3 is inserted from the outside to the inner side of the case body 1, and a recess 4 is provided in the middle thereof in a direction perpendicular to the groove 3.

This recess 4 is formed so that its corresponding surfaces are narrower toward the bottom, and its cross-sectional shape is an inverted trapezoid. The recesses 4 are provided independently for each groove 3, and are formed so as not to intersect with adjacent recesses. A groove 3 leading from this recess 4 to the inside of the case body l
a is formed a little deeper and has a stepped shape (second
(see figure).

A contact portion 5 formed of a metal plate shown in FIG. 1(b) is mounted in the recess 4. As shown in FIG. This contact portion 5 is formed to have a U-shaped cross section, and a notch portion 5a equal to the depth of the groove portion 3 is provided on the side surface corresponding to the groove portion 3. 5b is an extension. and,
When this contact portion 5 is installed in the recess 4 as shown in FIG. 2, the lead piece 5b is arranged so as to protrude inside the case body 1. A lead portion from an output it itn housed inside the case body 1 is connected to this lead piece 5b by soldering or the like.

On the other hand, as shown in FIGS. 1 and 2, the case lid part 2 that is fitted into the case body 1 is provided with a trapezoidal convex part 6 that is fitted into the recessed part 4. When the part 2 is fitted into the case body l, the convex part 6 is fitted into the contact part 5 mounted in the recessed part 4 and pressed into contact with it.

In the above configuration, as shown in FIG.
When the tip of the holder is placed in the groove 3 of the case body 1 with the coating removed, the portion with the coating removed is placed over the notch 5a of the contact part 5, and the case cover 2 is fitted into the case body 1. The exposed portion of the lead wire 7 is pressed by the convex portion 6 of the case lid portion 2 and is bent while being sandwiched inside the contact portion 5 and pressed against the convex portion 6 to be electrically connected. And this case lid part 2
By removing the lead wire 7, the lead wire 7 can be easily removed from the contact portion 5. Of course, the lead wires 7 may be soldered and fixed in advance.Also, the above explanation is for a connection structure with three terminals, but in the case of four terminals, the same connection can be made by adding the number of terminals. Can be done.

(Second Embodiment) A second embodiment of the present invention is one in which a case body and a case lid are provided with uneven portions, respectively, and will be explained with reference to FIG. 4.

In the figure, reference numeral 8 denotes the main body of the cartridge case, showing the side connected to a tone arm (not shown). A power generation mechanism such as a moving magnet moving coil and a moving iron is housed inside the case body 8, and these power generation mechanisms are equipped with a cantilever equipped with a stylus tip that vibrates following the sound groove of a record. . A case body 8 of a cartridge that houses this power generation mechanism, and a case lid 9 fitted to this case body 8.
A plurality of grooves 10 for guiding lead wires are provided on the contact surface. This groove portion IO is inserted from the outside to the inner side of the case body 8, and four portions 11 are provided in the middle thereof in a direction perpendicular to the groove portion 10. The recesses 11 are formed narrower on the corresponding surface sides or on the bottom sides, and have an inverted trapezoidal cross-sectional shape. The recesses 11 are provided independently for each groove 10, and are formed so as not to intersect with adjacent recesses.

On the other hand, the case cover 9 that is fitted into the case body 8 also has a groove 10' similar to the groove lO at a shifted position that does not coincide with the recess 11 of the case body 8. A plurality of recesses 11' are provided at positions corresponding to the recesses 11 of the main body 8, and the recesses 11 of the case main body 8 and the recesses 11 of the case cover 9 are offset from each other and cannot be provided so as not to contact each other. be.

On the contact surfaces of the case body 8 and the case lid 9 adjacent to these recesses 11 and 11', trapezoidal projections 12 and 12' are fitted into the corresponding recesses 11 or 11°. are provided respectively, and by fitting the case lid 9 to the case body 8, the respective recesses 11 and protrusions 12 are formed into corresponding protrusions 12° and recesses 1.
1'.

The contact portion 5 of the metal plate shown in FIG. 1(b) of the first embodiment is installed in each of these recesses 11 and 11′, and the coating on the tip of the lead wire is removed and the contact portion is placed on the contact portion. When the case main body 8 and the case lid portion 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 recess 4.11.11' described above is the groove 3.10.
It is not limited to the direction perpendicular to the groove 10', but the same effect can be obtained even if it is provided along the direction of the groove 3.10°10°. Moreover, the case body 1 of the case lid part 2.9.
The attachment to 8 is not limited to fitting, and may also be done by screwing. The above explanation has been about the cartridge case, but it is also possible to connect the lead wires of electrical equipment from the case body and the case lid attached to it. It can also be widely used as a connection structure.

(Effects of the Invention) As explained above, the lead wire connection structure of the present invention has a plurality of concavo-convex portions provided on the case body, and a case lid fitted to the case body that engages with the concave-convex portions. A plurality of concave and convex portions are provided, and a contact portion for conducting human output into the case body is provided in the plurality of concave portions, and a lead wire from the outside is brought into contact with the contact portion, and the case lid portion is closed. By fitting the lead wire into the case body, the convex portion presses the lead wire against the contact portion and establishes electrical continuity, so there is no need to use a connecting fitting such as a chip at the tip of the lead wire. Since the number of parts can be reduced and a caulking tool is not used, costs are reduced, and there is no looseness at the connection point, which has the advantage of preventing the generation of noise.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention. figure Figure 2 is a sectional view of the first cross section, and Figure 3 is the lead wire connection (a). 1゜ ・Case body 2゜ ・Case lid part 4゜ 11° ・Part 4 ・Contact part 6゜ 12゛ ・Protrusion ·Lead No. figure No. figure (1 other person) Procedure chief city■Misho (spontaneous) No. figure 1.Display of the incident 1986 Special permission wish No. 299998 Ten thousand 2. Name of the invention Lead wire connection structure 3. Person who makes corrections Relationship with the incident

Claims (1)

[Claims] A case body is provided with a plurality of concave and convex portions, and a case lid fitted to the case body is provided with a plurality of concave and convex portions that engage with the concave and convex portions, and the case body is provided with a plurality of concave and convex portions that are inserted into the case body into the plurality of concave portions. A contact part is provided to conduct the output, and by bringing a lead wire from the outside into contact with the contact part and fitting the case lid part to the case body, the convex part presses the lead wire to the contact part. A lead wire connection structure characterized by electrical continuity.