JPS6042469Y2 - terminal board - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a terminal board for connecting electrical wiring, and particularly to a terminal board suitable for directly screwing and connecting electrical wiring (lead wires) to a printed circuit board or the like.

In general, a terminal board is a printed circuit board or other complex electrical circuit component, and the terminal board studs are soldered to the electrical circuit component to make an electrical connection to the outside, and the electrical wiring of the device is screwed to this terminal board. This is normally done and will be explained in detail with reference to the drawings.

FIG. 1 is a plan view of a conventional terminal board, FIG. 2 is a side sectional view thereof, and FIG. 3 is a detailed sectional view of the main part.

In the figure, 1 is an insulating member, 2 is a stud, 3 is a small screw for tightening electrical wiring (hereinafter referred to as electric wire), 4 is a printed circuit board 1.5 is the gap between the stud hole and the stud, 6 is the stud and the printed circuit board A soldering part for electrical connection with the board, 7 a speed nut for fixing a stud, 8 a hole for inserting a stud drilled in advance in the insulating member 1, and a stud 2 is inserted into this hole.
Since the gap 5 is provided, the stud 2 is removable.

Now, when the terminal board, in which the studs 2 are inserted into the predetermined holes 8 and assembled with the speed nuts 7, is soldered to the printed circuit board 4, for example, screw the small screws 3 in order to strengthen the connection between the electric wire and the studs 2. When tightened strongly, the stud 2 rotates within the gap 5, applying direct rotational torque to the soldering part 6, damaging the soldering between the tip of the stud 2 and the printed circuit board 4, and causing problems in the electrical connection. There was a problem that occurred.

In order to eliminate the above-mentioned problems, this invention realizes a terminal board in which the stud portion is firmly held by an insulating member. Next, one embodiment of this invention will be described in detail.

FIG. 4 is an illustrative side view of the main parts of a terminal board according to an embodiment of this invention, with a part cut away.

FIG. 5 is a plan view thereof, in which the same parts as in FIGS. 1, 2, and 3 are given the same reference numerals.

The tapered hole 8' into which the stud 2 of the insulating member 1 is inserted has a similar shape to the cross section of the stud 2 as in the conventional one, but it has a tapered shape and the size of the bottom is somewhat larger than that of the stud 2. It has become smaller.

Therefore, the corner of the base of the stud 2 comes into contact with the inner wall somewhat above the lower end surface of the taper hole 8', and since both the stud 2 and the taper hole 8' are square non-circular, the stud 2
rotation can be stopped reliably.

In other words, even if the machine screw 3 is strongly tightened to firmly connect the electric wire to the stud 2, the stud 2 is secured by the inner wall of the tapered hole 8' of the insulating member 1, and the rotational torque is not transmitted to the tip of the stud 2. Therefore, there is no risk of damaging the soldered portion 6.

The insulating member 1 is mass-produced in the form of a band-shaped bar with a large number of taper holes or aligned holes, cut to an appropriate length corresponding to the required number of terminals, and the stud 2 is inserted into it. Assemble with nuts 7 etc.

In this embodiment, a parallel portion 9' is provided at the tip of the stud 2, which restricts the movement of the stud 2 even when the stud 2 is tilted, thereby facilitating assembly.

To attach the terminal board to the printed circuit board 4, attach each pin part 9 provided at the tip of the stud 2 to the printed circuit board 4.
Solder the connectors by passing them through the connection holes that have been drilled in advance.

In the case of a connection box other than the printed circuit board 4, for example, the internal lead wires are directly soldered to the pin portions 9 provided on the stud 2.

Note that the stud 2, parallel portion 9', and pin portion 9 can also be formed integrally.

In this device, as mentioned above, the corner of the base of the stud is in contact with the inner wall of the tapered hole in the insulating member, and the taper hole and the stud have similar non-circular shapes, so it is easy to connect electric wires. The stud is stopped from rotating by the tightening torque of the machine screw, so there is no risk of damaging the soldered part at the tip of the stud.

Furthermore, in order to reduce electrical leakage and induction between circuits, it is also possible to optionally provide a tapered hole that does not fit a stud.
It has excellent functions.

It is also more effective to make both the stud and the hole tapered so that the tapered sidewall allows the stud to be wider.

However, in addition to the above-mentioned embodiments, it is also possible to make the stud into a tapered shape and make the hole drilled in the insulating member into a parallel hole, but since the insulating member is generally manufactured by molding synthetic resin material, the taper Using one hole makes it easier to manufacture an insulating member and is more economical.

Furthermore, it is also possible to embed the studs during molding of the insulating member to hold the studs firmly.
In this case, it is impossible to freely select the spacing between the studs, and it is impossible to reduce electrical leakage and induction.

As detailed above, the effect of this invention is that the hole into which the stud is inserted is non-circular and tapered in the depth direction, while the stud has a lower end section that is somewhat larger than the bottom section of the tapered hole. The extremely simple configuration, which has a shape that is almost similar to the cross-sectional shape and the stud is secured in contact with the tapered side wall, prevents the stud from rotating due to the tightening torque of the screw that connects the electric wire. The present invention provides a terminal board that secures studs at the same time, allows the spacing of the studs to be selected as required, and is also highly economical.

[Brief explanation of drawings]

Figures 1, 2, and 3 are side, plan, and detailed sectional views of a conventional terminal board, respectively, and Figures 4 and 5 are a side view and a diagram of a terminal board according to an embodiment of this invention, respectively. FIG. 1: Insulating member, 2: Stud, 3: Machine screw, 4 Niblint board, 5: Gap, 6: Soldering part, 7: Speed nut, 8: Hole, 8': Tapered hole.

Claims (1)

[Scope of utility model registration request] In a terminal board that connects the lead wire to a circuit on the printed board, etc. by inserting a stud into a hole provided in an insulating part attached to the printed board, etc., and screwing the lead wire onto the top of the stud, The hole provided in the insulation part is a tapered hole with a non-circular cross section and a taper in the depth direction, and the stud has a lower end cross section larger than the bottom cross section of the taper hole and a cross section thereof A terminal board with a shape that is almost similar to the surface shape, and the contact surface between the taper wall of the hole and the stud receives and retains the rotational torque when the lead wire is attached to the stud.