JPS587988Y2 - Flat ribbon cable connector - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a flat ribbon cable connector.

A flat ribbon cable is constructed by arranging and connecting a plurality of so-called vinyl wires, each of which has a core wire coated with a vinyl resin, on a surface.

In this type of cable, the gap between adjacent core wires is small, and the number of wires is relatively large, so it is time-consuming and troublesome to strip the insulation coating at each connection point and solder the core wires one by one. .

For this purpose, as shown in Fig. 1, the flat ribbon cable 3 is sandwiched between the insulating base 1 and the cover 2, and when the flat ribbon cable 3 is sandwiched, the bifurcated contacts installed in a staggered manner on the insulating base 1 are used. 4, the cable 3 is press-fitted into the insulating base 1, and at this time, the insulation coating is broken, each core wire of the cable 3 is brought into contact with the contact 4, and the terminal 5 extending from the contact 4 is made to protrude from the plate surface of the insulating base 1.
A flat ribbon cable connector is conceivable in which the terminal 5 is inserted into a mounting hole of a printed circuit board and soldered to the printed circuit board to connect the cable 3 and the circuit of the printed circuit board.

In such a connector, the cover 2 is connected to the insulating base 1.
Contact between the core wire and the contactor 4 cannot be ensured unless the core wire and the contactor 4 are firmly locked.

A possible method for securing the cover 2 to the insulating base 1 is to use screws, but since the main method of use is to attach the connector directly to a printed circuit board, the overall height H of the connector and It is desired that the distance A from both ends of the cable 3 to the end of the connector be as small as possible.

For this reason, there is no space for fixing with screws. (Conventionally, as shown in Figures 2 to 5, a structure has been adopted in which the insulating base 1 and the cover 2 are joined together by means of retaining means formed on the cover 2 and maintained in that state. .

In the example shown in FIG. 2, a cutout 6 is formed in the insulating base 1, and a claw 7 is protruded into the cutout 6, and the cutout window 9 of the protruding piece 8 extending from the cover 2 is first engaged with the claw 7. In this state, the cable 3 is inserted between the base 1 and the cover 2, and then the cover is pressed and the claw 7 is engaged with the window 9' to complete the connection and connect both the base 1 and the cover 2. I have to.

Further, in the example shown in FIG. 3, a pin-shaped body 10 is formed in the notch 6 of the insulating base 1, and the notch hole 11 of the protrusion 8 extending from the cover 2 is press-fitted into this pin-shaped body 10, so that both 1 and I am trying to combine the two.

In the example shown in FIG. 4, recesses 12-12 and 12'-12' are formed on both sides of the notch 6 formed in the insulating base 1, and the recess 12-12, which is formed at a shallow position, extends from the cover 2. A claw 14-14 formed at the tip of the leg 13-13
In this state, the cable 3 is inserted between the base 1 and the cover 2, and then the claws 14-14 are engaged with the recesses 12'-12' formed at deep positions to complete the connection. I'm trying to combine the two.

In this case, a pair of protrusions 15-1 are also removed from the insulating base 1.
5 is provided in a protruding manner, and this protruding piece 15-15 is placed along the leg 13-13 formed on the cover 2 to prevent looseness between the cover 2 and the base 1 when the cover 2 is connected to the base 1.

Further, in the example shown in FIG. 5, a cutout 6' is formed in the cover 2, and step portions 16-16 are formed on both sides of the cutout 6'.
A pair of legs 17-17 protruding from the insulating base 1 at 6-16
By engaging the claws 18-18 formed in the cover 2 and the base 1,
I am trying to combine them.

According to these conventional connectors for flat ribbon cables, the distance A between the end of the cable 3 in the width direction and the end of the connector is small, so the protrusion 8 and the legs 13.degree. 18 cannot be made thick.

As a result, the cable has a weak strength and can be damaged due to careless handling, and is weak against force in the width direction of the cable 3, so that the cover 2 tends to come off due to force in this direction.

In addition, when positioning the cable 3 before wiring work, in the case of Figures 2 and 4, the cable 3 is inserted into the gap with the cover 2 engaged with the base 1 at an intermediate position. There is a drawback that it is difficult for the tip of the cable 3 to touch the contact 4.

In either case, a waveform 19 (see FIG. 6 or FIG. 8) is formed on the back surface of the cover 2 to position the cable 3, but there is no means for supporting the cable 3.

Therefore, when connecting the cable 3 to the contactor 4, compressive force is applied between the cover 2 and the base 1 while keeping the cable 3 pressed against the waveform 19 formed on the back surface of the cover 2 and positioned. the cable 3 must be pressed into the fork of each contact 4.

Therefore, there is a drawback that positioning the cable 3 during connection is troublesome.

The first object of this invention is to provide a flat ribbon cable connector that has a strong bonding force between the base 1 and the cover 2 and is highly reliable.

A second object of this invention is to provide a flat ribbon cable connector that allows easy cable positioning and connection work.

In this invention, an inwardly expanding concave groove is formed on the base 1, and a protrusion is formed on the cover 2 to be inserted into this inwardly expanding concave groove, and the engagement between the inwardly expanding concave groove and the protrusion creates a strong engagement. It is configured to obtain a resultant force.

In addition, in this invention, a folded piece is formed inward from the tip of the protrusion formed on the cover 2, and this folded piece constitutes a means for locking the base and the cover, and is configured to obtain a strong locking force. be.

An embodiment of this invention will be explained in detail below using FIG. 6 and subsequent figures.

In this invention, protrusions 20-20 are formed at both ends of the cover 2.

The projections 20-20 are narrow on the outside and wide on the inside.

A groove 6 expanding inward is formed in the base 1.

That is, a pair of protrusions 21-21 are formed at the open end portions, respectively, to protrude in a direction that closes the groove 6, so that the groove 6 that expands inward is formed as a whole.

The narrow part of the protrusion 20 formed on the cover 2 is a protrusion 21-2.
1, and the wide portion is inserted into the wide portion of the groove 6.

Therefore, when the protrusion 20-20 is inserted into the notch 6-6, the protrusion 20-20 is suppressed from the outside by the protrusion 21-21, and even if a force in the width direction of the cable 3 is applied between the base 1 and the cover 2, the protrusion 20-20 does not come off from the notch 6-6.

On the other hand, the tip of the protrusion 20-20 is integrally formed with a folded piece 22-22 which is bent inwardly.

The folding pieces 22-22 are bent from each tip of the protrusion 20-20 and are bent and extended substantially parallel to the protrusion 20-20, and the free ends thereof are configured to be able to bend largely due to the elasticity of the resin material. .

In this example, protrusions 24-24 that are parallel to the cable 3 are formed on mutually opposing surfaces of the folded pieces 22-22.

A step portion 2525 is formed at the end of the bottom surface of the groove 6 of the base 1 relative to the protrusions 24-24.

The protrusion 2 formed on this stepped portion 25-25 and the folded piece 2222
4-24 constitutes a locking means.

According to the above configuration, the protrusion 20- is formed in the inwardly expanding concave groove 6-6.
20 and the folded piece 22-22 are inserted and press-fitted, as shown in FIG. 25 is engaged with the base 1 and the cover 2 to prevent them from coming off.

Therefore, according to this invention, the protrusion 20-20 is restrained from the force applied to the outside by the pair of protrusions 21-21 formed on both sides of the groove 6, so that the protrusion 20-20 is suppressed in the coupled state.
-20 does not bend outward, and the base 1 and cover 2 never come out of contact.

Moreover, since the cover 2 has a folded piece 22-22 folded inward from the tip of the protrusion 20-20, the cable 3 can be extended below the folded piece 22-22, making the width of the cover 2 effective. Available for

Further, as shown in FIG. 8, the flat ribbon cable 3 can be held down to the waveform 19 by the folding pieces 22-22, and once the cable 3 is press-fitted to the lower side of the folding pieces 22-22, the cable 3 can be folded back. It is held down by the piece 2222 and held in position by the corrugation 19.

Therefore, since the flat ribbon cable 3 can be supported in a positioned position with respect to the cover 2, if the base 1 and the cover 2 are connected in this state, each core wire of the cable 3 can be accurately press-fitted into the forked part of the contact piece 4. Connection work can be done easily.

As explained above, according to this invention, the means for connecting the base 1 and the cover 2 is suppressed by the protrusion 2121 on the outside, so that the cable 3 is connected between the base 1 and the cover 2.
Even if a force is applied in the width direction, the connection will not come off at all, and a highly reliable connector can be provided.

Moreover, since the flat ribbon cable 3 can be temporarily fixed to the cover 2 in a positioned state, there is an advantage that the wiring work can be easily performed, and this effect is extremely large in practical use.

In the above description, the protrusion 24 is formed on the inside of the folded piece 22, and the step 25 is formed in the notch 6, but this relationship may also be reversed.
It is easy to understand that the choice can be made arbitrarily.

[Brief explanation of drawings]

FIG. 1 is a sectional view for explaining the structure of a flat ribbon cable connector, and FIGS. 2 to 5 are perspective views showing a locking means of a conventional flat ribbon cable connector.
FIG. 6 is an exploded perspective view showing an embodiment of this invention, and FIG. 7 is a sectional view for explaining the state of attachment of the main parts of this invention.
FIG. 8 is a front view for explaining the effects of this invention. 1: Base, 2: Cover, 3: Flat ribbon cable, 4: Contact, 5: Terminal, 20: Projection, 22: Folding piece.

Claims (1)

[Scope of Claim for Utility Model Registration] A. A contact in which a plurality of contacts are arranged, and by pressing a flat ribbon cable onto the surface on which the contacts are arranged, the contacts bite into the insulation coating of the flat ribbon cable. B. A cover that holds the flat ribbon cable and presses against the contact; C. An inner expansion formed on both sides of the flat ribbon cable of the base in the width direction. D is inserted into the inwardly expanding grooves formed on both sides of the flat ribbon cable of the cover in the width direction, and is guided by the grooves to connect the core wire of the flat ribbon cable to the contactor. E. A pair of folded pieces that are folded back from the tip of this protrusion to opposite sides to add elasticity; F. Mutually opposing surfaces of this pair of folded pieces and the above. A locking means for locking the press-contact state between the cover and the base by engaging a convex and a concave formed on the bottom surface of an inwardly expanding concave groove formed on the base. connector.