JPH059739Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a circuit board for an electronic kit, which has printed wiring on the back side and is used to form a different circuit by replacing some of the circuit components on the front side.

This type of circuit board needs to be able to easily and quickly change the connection of circuit elements, and also needs to be provided with connection terminals that will not damage the lead wires.

The lead wires of resistors, capacitors, transistors, etc., which are replacement circuit elements constituting the circuit, are usually single wires, and the lead wires of external circuit components such as speakers or transformers are usually twisted wires.

Taking these differences into consideration, this proposal provides coil spring terminals for the external circuit connection terminals, provides upward insertion type sockets for the internal circuit component connection terminals, and allows the lead wires to be folded when changing component connections. It is designed to be able to be carried out quickly and accurately without bending over, and it also reduces the space occupied by these connection terminals on conventional boards, increases the packaging density of circuit components, and eliminates the need for complex circuits even when using a small board. A kit having the circuit configuration can be provided.

An embodiment of this product will be described with reference to FIG.

Reference numeral 1 denotes a board, on the front surface 1a of which a fixed object such as a switch 18 is fixed, and on the back surface 1b a printed wiring 14 is provided.

Reference numeral 2 denotes a coiled terminal for connecting a battery or other external circuit, and connection of twisted wires can be easily made by sandwiching the wire.

3 is a socket for replacing circuit components, 4 is a circuit component such as a resistor, capacitor, transistor, etc., and 5 is a single lead wire thereof.

The structure of the replacement socket is as shown in Fig. 2, where 7 is an inner cylinder made of contact-resistant elastic metal such as Be-Cu or phosphor bronze, which has a hole 6 in the center for inserting the lead wire, and a A clamping portion 9 is provided with a slit 8 or the like.

Reference numeral 10 denotes a holder, which includes a cylindrical portion 12 into which the inner tube 7 is fitted into its center hole 11, and a mounting pin 13 protruding from the bottom of the cylindrical portion 12.

The mounting pin 13 penetrates the board 1 and connects to the wiring section 1 on the back side.
4 and is soldered 15 to fix the holder 10 on the board.

Reference numeral 16 denotes a lead wire insertion guide taper provided on the outer end surface of the center hole of the holder.

Reference numeral 17 denotes an outer cylinder made of insulating synthetic resin, which covers the outer peripheral surface of the holder.

Incidentally, the socket 3 may be used as a single unit, but it is also possible to combine a plurality of sockets into one set by joining the synthetic resin outer cylinder 17, thereby making it easier to design and assemble the board. Along with this, it becomes easier to insert and remove the lead wire, and the assembly of the kit becomes easier to understand.

As described above, in the proposed board, since the connection terminals for stranded wires and the insertion terminals for single wires are arranged accordingly, it is possible to reliably replace small circuit components.
This makes insertion easier and makes learning circuits more fun.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the proposed circuit board, and FIG. 2 is an enlarged longitudinal sectional side view of the replacement socket. 2... is a coiled connection terminal, 3... is a replacement socket.

Claims (1)

[Scope of utility model registration request] On the printed circuit board that makes up the electronic kit,
In a circuit board in which at least some of the circuit elements are replaceable and connected to a power source or other external circuit, a coil-shaped connection terminal for connecting an external circuit twisted wire is provided on the board, and a coil-shaped connection terminal whose lower end is connected to the back side of the circuit board is provided. A circuit board for an electronic kit, which is connected to wiring, has an outer periphery covered with an insulating outer cylinder, and is provided with a circuit element replacement socket having a lead wire insertion hole at the upper end.