JPH0238381Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a device for attaching a terminal fitting on a printed wiring board, and in particular, a device for attaching a terminal fitting on a printed wiring board in which a terminal fitting to which a lead wire is connected is attached to a conductive pattern part of the board with a screw. It is related to the device.

Conventionally, in this type of device, various measures have been taken to prevent the terminal fitting from rotating when screwed, to prevent the screw from loosening, and to prevent the terminal fitting from shorting to other wiring patterns. 1 to 3 show their structures. In the case of the one shown in FIG. 1, a terminal fitting 4 is fixed with a screw 3 to a terminal pattern 2 printed and wired on a printed wiring board 1, and the terminal fitting 4 and the lead wire 5 are covered with an insulating protection tube 7 to prevent the connection portion 6 from coming into contact with other circuit patterns 8. This prevents the terminal fitting 4 from rotating when the screw 3 is tightened. However, in this device, since the pin 9 is provided only on one side, there is a risk that the terminal fitting 4 may turn on the side where the screw 3 is loosened. Furthermore, in order to prevent short circuits due to rotation of the terminal fitting 4, a protective tube 7 is required to cover the connecting portion 6 with the lead wire.

In Fig. 2, the terminal fitting 4 is a metal fitting with a claw, and the claw 4a consisting of a bent piece at the tip is engaged with the hole 1a drilled in the printed wiring board 1, so that the rotation of the terminal fitting 4 is relatively reliable. However, the terminal fitting 4 itself becomes expensive.

Figure 3 shows the connection part 6 between the terminal fitting 4 and the lead wire 5.
Pins 10 and 11 are placed upright on both sides of the tube.Since the area occupied by these pins 10 and 11 is relatively large, the protection tube 7 is not required, but it is difficult to arrange the circuit pattern. will impose constraints. Moreover, since the pins 10 and 11 protrude above the printed wiring board 1, the pins 10 and 11 may be bent or damaged when other parts are attached or transported, and the printed wiring board may not be installed in a narrow space. It becomes an obstacle when

The present invention was developed in view of the above points, and is a printed wiring board that can prevent terminal fittings from rotating without protruding pins, etc., and prevent short circuits of terminal fittings to other circuit patterns. It is an object of the present invention to provide a terminal fitting mounting device.

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 is a sectional view of an embodiment of the present invention, FIG. 5 is a perspective view, and FIG. 6 is an exploded perspective view.

In the figure, a printed wiring board 1 is placed on a case 12, a terminal fitting 4 is arranged on a terminal pattern 2 formed in a circuit pattern on the printed wiring board 1, and a hole 4b formed in the terminal fitting 4 is inserted from above. The terminal fitting 4 is fixed onto the printed wiring board 1 by the screw 3 inserted and screwed into the screw hole 12b of the case 12, and the printed wiring board 1 is fixed to the case 12.
sticks to. The terminal fitting 4 has an arm 4c,
Connect the lead wire 5 to this arm 4c by caulking,
A connecting portion 6 is formed that protrudes somewhat downward from the lower surface of the terminal fitting 4. A hole 1b is formed in the printed wiring board 1 where the connecting portion 6 is located, and a recess 12a is provided in the case 12 corresponding to the hole 1b. The downwardly protruding connecting portion 6 is housed in the space formed by the hole 1b and the recess 12a, and regulates the position of the terminal fitting 4.

Incidentally, a pin 13 is provided upright on the case 12, but this is for determining the mutual position with the printed wiring board 1, and it is located at a position away from the connection part 6 of the terminal fitting 4, and is placed on the printed wiring board 1. It engages with the hole 1c provided in the.

To install the terminal fitting 4, attach the pin 1 of the case 12.
3 into the hole 1c of the printed wiring board 1, and insert the hole 1 of the printed wiring board 1 into the recess 12a of the case 12.
b, and the holes 2a of the terminal pattern 2 are aligned with the screw holes 12b of the case 12, the terminal metal fittings 4 are placed on the terminal patterns 2, the connecting portions 6 are housed in the holes 1b and the recesses 12a, and the screws 3 The terminal fittings 4 and the printed wiring board 1 are fixed to the case 12. When the screw 3 is tightened, the terminal fitting 4 is prevented from rotating because the connecting portion 6 engages with the hole 1b.
Furthermore, even if the terminal fitting 4 attempts to rotate in the opposite direction to the tightening direction (in the direction in which the screw 3 loosens), the connecting portion 6
This is prevented by the engagement between the screw 3 and the hole 1b, and the screw 3 will not loosen.

In the above embodiment, the case 12 has a recess 1.
2a is formed, but this is effective when the amount of downward protrusion of the connecting portion 6 is large, and is not necessarily necessary when the connecting portion 6 can be formed thin.
Further, the recess 12a can also be formed as a hole.

The present invention is as described above, and since the connection part between the lead wire and the terminal fitting is housed in the hole provided on the printed wiring board, the rotation of the terminal fitting is possible without providing a protruding part on the printed wiring board. It is possible to prevent short-circuiting of the terminal fittings to other circuit patterns, and there is no need to form unnecessary protrusions on the printed wiring board, so it does not impose restrictions on the arrangement of the circuit patterns. It is convenient for installing printed wiring boards in narrow spaces and for transporting printed wiring boards.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional terminal fitting mounting structure, FIG. 2 is a perspective view showing another conventional terminal fitting mounting structure, and FIG. 3 is a perspective view showing another conventional terminal fitting mounting structure. Fig. 4 is a sectional view of the main part of the embodiment of the invention, Fig. 5 is a perspective view of the main part of the embodiment of the invention, and Fig. 6 is a sectional view of the main part of the embodiment of the invention.
The figure is an exploded perspective view of an embodiment of the present invention. 1...Printed wiring board, 1b...hole, 3...
Screw, 4...Terminal fitting, 5...Lead wire, 6...
Connection portion, 12...case, 12a...recess.

Claims (1)

[Scope of Claim for Utility Model Registration] In a device that attaches a terminal fitting to a lead wire and attaches this terminal fitting to a printed wiring board with a screw to electrically connect it to a terminal pattern, 1. A mounting device for a terminal fitting on a printed wiring board, characterized in that a connection portion between a lead wire and a terminal fitting is accommodated in the hole, and rotation of the terminal fitting is restricted.