JPS6215976Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead wire connection device, and more particularly to a lead wire connection device for easily and reliably connecting lead wires to various terminals in electronic equipment.

2. Description of the Related Art Conventionally, a lead wire connecting device as shown in FIG. 1 has been widely known as a device for connecting an external lead wire such as an antenna wire or a speaker wire to an external terminal provided on an electronic device. To briefly explain this, reference numeral 1 is a printed wiring board attached to a chassis that forms the base of an electronic device.A predetermined printed pattern is formed on the right side of this wiring board 1, and each pattern is formed on the left side. Electronic circuit components corresponding to the above are attached using methods such as solder dips. Reference numeral 2 denotes an outer casing of a cabinet or the like, and an insulating plate 4 is attached to a through hole 3 formed in the outer casing 2 by fitting or screwing. A through hole 5 is bored in the center of the insulating plate 4, into which a decorative screw, which will be described later, is inserted. Further, two long holes 6 are bored in this insulating plate 4, and leg portions 7a of a metal stay 7 bent in a U-shape are inserted into the long holes 6.
The tip thereof faces the printed pattern surface of the printed wiring board 1. On the other hand, a screw hole 8 is bored in the center of the mounting plate portion 7b of the stay 7 that covers a part of the insulating plate 4.
Decorative screw 9 with a knurl formed around the head
are screwed together. Further, the tip of this decorative screw 9 is crushed to form a retaining portion 9a,
This decorative screw 9 is designed so that it cannot be easily removed from the screw hole 8. When the chassis is attached to the outer casing 2, the tips of the legs 7a are fixed to a predetermined printed pattern on the printed wiring board 1 by soldering 10. Reference numeral 11 denotes a washer interposed between the mounting plate portion 7b and the decorative screw 9. According to such a connection device, the connection lead of the antenna feeder or the speaker can be connected by loosening the decorative screw 9, wrapping it around the threaded rod portion 9b, and then screwing the decorative screw 9 into the stay 7 again. Therefore, this connection lead or the like is held between the washer 11 and the decorative screw 9 to achieve mechanical retention and electrical connection.

By the way, according to such a conventional connection device, its components are an insulating plate 4, a stay 7, a decorative screw 9, and a washer 11.
It is not completed until various subsequent processes have been performed, and the efficiency of the assembly work is extremely low. In addition, the outer casing 2
When assembling the chassis to the chassis, it is necessary to solder the legs 7a of the stay 7 to the printed wiring board 1, which is a troublesome work. Furthermore, the work of connecting the lead wires to the connecting device involves the troublesome work of turning the decorative screws 9 each time, which is inconvenient in use. However, in order to improve some of these drawbacks, by providing one through hole in each of the overlapping parts or opposing pieces of the leaf springs and pushing and loosening the leaf springs, the gap between the two through holes can be improved. Connecting devices with a simple structure in which the lead wire is interposed and held between the holes have been provided, but in all of these devices, the work of inserting the lead wire into the through hole is cumbersome, and the shape of the leaf spring for forming the lead wire is cumbersome. The drawback was that the cost of parts was relatively high.

The present invention solves all of the drawbacks of the conventional methods as described above, and provides a lead wire connection that has a simplified structure, facilitates lead wire connection operations, and enables reliable connection. It was proposed for the purpose of providing a device.

Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings.

The present invention has a cabinet 32 constructed by a pair of cabinet halves 12 and 13 made of synthetic resin butted against each other and integrated. This cabinet 32 has predetermined electric circuit parts and the like disposed therein to constitute the main body of an electric device such as a radio receiver. This cabinet 32
One half of the cabinet 12 constituting the back side of
A recess 14 is formed on the outer peripheral surface of the recess 14.
One or more cylindrical bodies 16 are provided inside to protrude outward. This cylindrical body 1
As shown in FIG. 3, the opening 6 has an opening 16a opening into the cabinet 32 at its proximal end, and has a bottom 16b at its distal end protruding outward from the cabinet half 12. An opening window 15 is formed in one side located on the side. On the side of the opening 16a of the cylindrical body 16, a stepped portion 17a is formed so as to protrude inward of the cabinet 2 and have a diameter larger than the diameter of the opening 16a. annular protrusion 1
7 is provided.

Further, one half of the cabinet 12 is provided with a mounting recess 19, and the center portion of this mounting recess 19 projects deeper into the interior to form an annular protrusion 20. On the other hand, one of the cabinet halves 1
A mounting boss 21 is provided in a protruding manner at a portion of the other cabinet half 13 that is integrally coupled with the other cabinet half 13 that corresponds to the mounting recess 19, and an annular projection 20 that receives the annular protrusion 20 is provided at the center of the tip surface of the mounting boss 21. Recess 22
is provided.

These pair of cabinet halves 12 and 13 are
As shown in FIG. 3, the annular protrusion 20 and the mounting boss 21 are integrally connected by screwing a screw 27 into the annular projection 20 and the mounting boss 21.

A printed wiring board 23 is disposed within the cabinet 32 constructed as described above, which is attached together with the pair of cabinet halves 12 and 13 by the screws 27 when the pair of cabinet halves 12 and 13 are joined together. Ru. This printed wiring board 23 constitutes a predetermined electric circuit of the electric device, and is connected to one half of the cabinet 1.
A necessary printed pattern 24 is provided on one side surface on the upper side in FIG. Further, a part of the printed pattern 24 formed on one side of the printed wiring board 23 has a connection pattern portion 2 which is in contact with one end of a coil spring 18, which will be described later.
4a is formed, and this connection pattern portion 24a is
When the printed wiring board 23 is disposed in the cabinet 32, it is provided at a position facing the opening 16a of the cylindrical body 16. The printed wiring board 23 has a through hole 26 bored in the peripheral portion.
By fitting into the annular protrusion 20 of the mounting recess 19 provided in one of the cabinet halves 12, it is integrally connected with the pair of cabinet halves 12 and 13.

A coil spring 18 formed as shown in FIG. 4 is disposed within the cabinet 32 in which the printed wiring board 23 is disposed as described above. The coil spring 18 is made of conductive metal, and includes a small diameter coil portion 18a inserted into the cylindrical body 16 and a stepped portion 17a within the annular projection 17.
Large-diameter coil and connection pattern portion 24 that are locked to
The conical coil portion 18b continuously has a small diameter coil in contact with the conical coil portion 18b. The coil spring 18 has a conical coil portion 18b.
One end of the side is brought into contact with the connection pattern part 24a of the printed wiring board 23, and the small diameter coil part 18 of the other end is brought into contact with the connection pattern part 24a of the printed wiring board 23.
a is held in a cylindrical body 16, compressed and clamped by this holder 16 and the printed wiring board 23, and the small diameter coil portion 18a faces the opening window 15 of the cylindrical body 16. Ru.

To install the coil spring 18, attach the pair of cabinet halves 12 and 13 with screws 2.
By attaching the conical coil portion 18b to the cylindrical body 16 and the annular protrusion 17 before integrally connecting it with 7, the tip of the conical coil portion 18b can be elastically pressed onto the connection pattern portion 24 of the printed wiring board 23 during the connection. It becomes like touching.

By attaching the coil spring 18 as described above, the lead wire 30 for external connection such as the feeder wire of the antenna or the lead wire from the speaker is connected to the small diameter coil portion of the coil spring 18 through the opening window 15 of the cylindrical body 16. When inserted into 18a, it is held by the elastic force of the coil spring 18,
Electrical connection to the connection pattern portion 24a is established. In addition, in order to securely attach the lead wire 30 to the coil spring 18, the lead wire 30 can be securely attached by winding it around the cylindrical body 16 near the small diameter coil portion 18a. Detachment is reliably prevented, and electrical connection with the connection pattern section 24 is reliably established via the small diameter coil section 18a. Although the above connection device has been described for connecting antenna feeder wires and speaker lead wires, it goes without saying that it can also be used for purposes such as connection terminals for training wiring model boards. stomach.

As mentioned above, the lead wire connection device according to the present invention includes a metal coil that is electrically connected to the connection pattern of the printed wiring board disposed in the cabinet, and to which the lead wire is connected. The spring is housed in the cabinet and covered by a cylindrical body protruding from the cabinet, and is exposed to the outside through an opening window provided on one side of the cylindrical body to allow connection of lead wires. Since the coil spring is arranged as such, a lead wire can be connected to the coil spring through the opening window, and fingers or the like will not come into contact with or come into contact with the coil spring inadvertently. Therefore, it is possible to reliably prevent the coil spring from bending or elongating beyond its elastic limit due to contact with fingers or the like. Lead wire connections using clamping force can be guaranteed for a long period of time.

In addition, in the device of the present invention, the coil spring is compressed and held in direct contact with the printed circuit board disposed in the cabinet, so soldering is not required for electrical connection between the coil spring and the printed circuit board. This makes assembly easy.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a conventional lead wire connecting device, FIG. 2 is a perspective view of the main parts of the lead wire connecting device according to the present invention, FIG. 3 is a cross-sectional view of the main parts, and FIG. The figure is a perspective view of a coil spring used in the present invention. 12, 13... Cabinet half, 15... Opening window, 16... Cylindrical body, 16a... Opening, 16
b...Bottom, 18...Coil spring, 23...
...Printed wiring board, 24a... Connection pattern section, 30... Lead wire, 32... Cabinet.

Claims (1)

[Scope of utility model registration request] An opening window is formed on the outer peripheral surface of the cabinet made of synthetic resin, and has an opening that opens into the cabinet at the proximal end, and a bottom at the distal end, and an opening window located on the outside of the cabinet. At the same time, a printed wiring board provided with a connection pattern is placed in the cabinet so that the connection pattern faces the opening of the cylindrical body, and one end is provided with the connection pattern. A metallic coil spring is compressed and clamped between the cylindrical body and the printed wiring board, with the other end held in the cylindrical body in contact with the pattern part, and a part of the coil spring is held in the cylindrical body. A lead wire connection device that faces an opening window and connects the lead wire to the coil spring through the opening window.