JPS5937967Y2 - Fixing device for electrical connection terminals - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing device for electrical connection terminals in, for example, automobile meters.

For example, automotive instruments are subject to vibrations caused by engine rotation and vibrations from the road surface when the car is running, so measures must be taken to ensure that electrical connections are maintained even in the face of these vibrations. need.

The present invention is suitable for use in automobile instruments.
When screwing together a plate terminal and a connecting terminal fixed to the tip of a lead wire from above the metal foil of a printed circuit board fixed to a resin case, the electrical connection is ensured even when vibration occurs. The purpose of this invention is to provide a fixing device for electrical connection terminals that has a simple structure and can be maintained.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view showing essential parts of an embodiment of the electrical connection terminal fixing device according to the present invention.

In FIG. 1, reference numeral 1 denotes a resin case, to which a printed wiring board 2 is fixed by appropriate means.

A metal foil 3 is applied to the surface of the printed wiring board 2 by well-known means.
Wiring according to a to 3b is provided.

This wiring is merely an example, and it goes without saying that an appropriate wiring pattern may be formed as required.

A screw hole 4a is drilled at one end of the metal foil 3a, and a plate terminal 5a is fixed therein with a screw 6a.
The other end of a is connected to the terminal 7a.

An end of the metal foil 3b having a screw hole 4b is located adjacent to the screw hole 4a.

A plate terminal 5b is fixed to this screw hole 4b with a screw 6b, and an electrical connection terminal 9a fixed to the tip of a lead wire 8a, which will be described later, is also fastened together.

The lead wire 8a is connected to a lamp holder 11 held in a through hole 10 provided in the case 1.

A U-shaped through groove 12 is bored near the screw hole 4b and on the side where the lead wire 8a is pulled out.

A protrusion member 13 formed integrally with the case 1 is inserted into the through groove 12 and protrudes from the surface of the printed wiring board 2 at a predetermined height.

This protruding member 13 has a pair of end walls 13a, 13
b and these end walls 13a.

A notch 13d is cut out from the center wall 13c to a predetermined height from the surface of the printed wiring board 2.
is formed.

In addition, the connector 14 is attached to the plate terminals 5a and 5b described above.
The electrical connection portions of the connectors 14 are fitted and connected, and since an elastic engaging claw 14a is formed on the side surface of the connector 14, the connector 14 is properly connected to the plate terminals 5a and 5b. In the state in which the engaging claw 14a is inserted into the notch 1 formed in the center wall 13c of the protrusion blade 3 described above.
3d to lock the connected state of the connector 14.

To remove the connector 14 from the plate terminals 5a, 5b, press the engaging claw 14a against the side wall of the connector 14, disengage the engaging claw 14a from the upper end of the notch 13d, and move the connector 14 upward. Just pull it up.

Now, next, connect the connecting terminal 9a together with the plate terminal 5b,
A case where they are tightened together using the screws 6b will be explained.

In this case, the connection terminal 9a fixed to the tip of the lead wire 8a is inserted into the notch 13d formed in the center wall 13c of the protruding member 13 from the lamp holder 11 side to the plate terminal 5.
Connect the connecting terminal 9 to the plate terminal 5b by inserting it toward the b side.
Stack them together and secure them in the screw holes 4b with screws 6b.

When two parts are fastened together with a single screw, if the lead wire is pulled in the direction of the screw loosening due to vibration, the screw will easily loosen, making the electrical connection unstable and causing contact. However, according to the present invention as described above, even if the lead wire 8a is pulled in the direction in which the screw 6b loosens, the connecting terminal 9a will not fit into the notch 13d of the protruding member 13.
Since the screw 6b is prevented from rotating by being inserted through the screw 6b, the screw 6b does not loosen.

Therefore, the metal foil 3b, the plate terminal 5b and the connecting terminal 9
The connection a is made reliably and no contact failure occurs.

In addition, the protruding member 13 provided for locking the connector 14 is shared in order to prevent rotation.
To provide a fixing device for an electrical connection terminal that has a simple configuration and exhibits excellent effects without adding any new parts.

FIG. 2 shows another embodiment of the present invention, in which the protruding member 13 is formed integrally with the case 1 that protrudes through the printed circuit board 2 so as to be located between the end walls 13a and 13b. A convex portion 15 is provided.

In this way, the root portion of the connecting terminal 9a rides on the convex portion 15 and rises from the surface of the printed wiring board 2, and the connecting terminal 9a
It is possible to prevent the ends of the lead wires 8a and 8a from coming into contact with metal foil for other wiring.

Therefore, the insulating sleeve that is normally attached to the base of the connecting terminal 9a can be omitted, and the number of man-hours and material costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the electrical connection terminal fixing device according to the present invention, and FIG. 2 is a perspective view showing the main parts of another embodiment of the present invention. 1... Resin case, 2... Printed wiring board, 3a to 3C... Metal foil, 4a to 4c...
...Screw hole, 5a. 5b...Plate terminal, 6a-6c...
・Screw, 8a. 8b... Lead wire, 9a, 9b... Connection terminal, 12... U-shaped through groove, 13...
...Protruding member, 13a, 13b... End wall, 1
3c...Central wall, 13d...Notch,
14... Connector, 14a... Engaging claw.

Claims (1)

[Scope of utility model registration request] The plate terminal and the connection terminal fixed to the tip of the lead wire are screwed together from above the metal foil of the printed wiring board fixed to the resin case, and A substantially U-shaped through groove is provided in the printed wiring board so as to be located near the bowed side of the lead wire, and a pair of wires are inserted into the U-shaped through groove and protrude to a predetermined height from the surface of the printed wiring board. and a protruding member that is cut out from a central wall connecting these end walls and has an integral bottom shape with the resin case in which a predetermined portion of the central wall on the surface of the printed wiring board is cut out; and the plate; and a locking connector having an electrical connection portion connected to the terminal and an engaging claw that is engaged with a notch in the center wall of the protruding member in a connected state, and at least one of the connection terminals. A fixing device for an electrical connection terminal, characterized in that the terminal is fixed by the screw while being inserted into a notch in the central wall of the protruding member.