JPS645826Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing mechanism for connecting contacts in a connector that is ideal for attaching connecting contacts, such as a group of grounding contacts, which are erected from a common ground base plate.

Generally, independent contacts are attached by press-fitting their legs into holes drilled in a connector base.

However, when attaching a group of grounding contacts to a connector base using a common ground base plate as a common seat plate, it is difficult to press-fit individual contacts as described above, so it is necessary to construct an alternative mounting means on the connector base.

In particular, if a large number of conductors in a multi-conductor flat cable are alternately used as signal conductors and ground conductors and the ground conductor is arranged adjacent to each signal conductor, electrical interference between the signal conductors, that is, crosstalk, may occur. It is known to prevent this and improve the transmission characteristics of each signal conductor.

In a connector that makes such a connection, it is necessary to have a grounding contact that makes a connection with a grounding conductor in addition to a contact that makes a press-contact connection with a signal conductor.

The present invention enables connecting contacts such as the above-mentioned group of grounding contacts to be easily and reliably attached to a connector base plate using a seat plate serving as a common grounding base plate.

The present invention will be explained in detail below based on the illustrated embodiments.

In each figure, 1 indicates a connector board, 2 indicates an independent signal contact, 3 indicates a connecting contact for grounding, and 4 indicates a flat cable. Both the independent contact 2 and the connected contact 3 have a pressure contact type contact structure. The press-contact type contact is a known one in which the insulating sheath of the flat cable 4 is penetrated, and the conductive wire within the insulating sheath accompanying the penetration is captured by the contact group to obtain an electrical connection.

All the grounding contacts 3 are connected to a common seat plate 3
b are integrally erected in double rows or single rows and attached to the connector base 1, and all the independent contacts 2 for signals are each independently connected to the connector base 1.
It is planted in.

The independent contact 2 and the connected contact 3 have a pair of contact pieces 2a, 3a with sharp tips, and a U-shaped slot is formed between both the sharp contact pieces 2a, 3a.

The signal independent contact 2 further has a male terminal 2b hanging from the lower end of the contact piece 2a, and the male terminal 2b is provided to protrude below the connector board 1, and the contact piece 2a is connected to the board 1.
It is press-fitted into a hole 1d drilled in the base so as to protrude upward.

On the other hand, in the connecting contact 3 for grounding, the lower end of the contact piece 3a is integrally connected to a seat plate 3b serving as a common ground base plate, and the common seat plate 3b is fixed to the upper surface of the connector base 1. protrude above the base,
The independent contacts 2 for signals are arranged in parallel on the left and right sides thereof.

In order to securely fix the connecting contact 3 to the connector base 1, a fitting part 1a is formed on the top surface of the connector base in the cable width direction, a common seat plate 3b is fitted to the fitting part 1a, and the fitting part 1a is fitted to the fitting part 1a. Insert the protrusion 1b erected on the bottom surface of 1a into the hole 3c drilled in the common seat plate 3b, and position it on the left and right inner walls of the fitting part 1a at the same pitch as the spacing of the grounding connection contacts 3 in the cable width direction. The protrusions 1c are arranged side by side, and each protrusion 1c
is held in the fixed position of the fitting portion 1a by intervening in the spacing between the connecting contacts 3.

Furthermore, an engaging pawl 5 which is interposed between each of the connecting contacts 3 and is latched to the upper surface of the edge of the seat plate is disposed at a position where a plurality of protrusions 1c provided on the inner wall of the fitting portion should be present. The mating claw 5 is supported by an elastically displaceable engagement piece 6 integrally formed on the connector base 1. The engaging claw 5 is integrally formed and protrudes from the entire surface of the engaging piece 6 so as to be engaged with the edge of the seat plate, and as the engaging piece 6 moves elastically, the engaging claw 5 The seat plate is configured so that it can be locked onto the upper surface of the edge of the seat plate.

As a first embodiment, FIGS. 1 to 4 show the engaging piece 6, which is connected to the base 1 only at both ends, along the inner wall of the fitting part 1a (along the side surface in the direction in which the connecting contacts are arranged). The engaging claw 5 is integrally formed in the center of the entire surface of the engaging piece 6, and a tapered portion 5a is formed on the upper surface of the engaging claw, so that the seat plate 3b can be connected to the engaging portion 1a. They are fitted while pushing away the tapered part 5a of the matching claw 5, and as a result, the engagement piece 6 is elastically displaced in the back direction (direction that resists elasticity) and is attached to the seat plate 3b.
As the seat plate is fitted, it is elastically displaced in the direction of restoring, intervenes between the contacts, and at the same time locks onto the upper surface of the edge of the seat plate. A recessed part 3d is formed on the edge of the seat plate between each contact, and a protrusion 1c is formed on the edge of the seat plate.
Insert.

In order to form the above-mentioned engagement piece 6 and to perform its elastic displacement movement well, long grooves 7 are provided along the engagement piece 6 on the back side and the front side of the engagement piece 6. Cut off the base 1 at a part other than both ends, and
Positioning protrusions 1c are adjacent to the connecting portions at both ends,
The engaging claw 5 is connected to the engaging piece 6 at the same pitch as the protrusion 1c.
It protrudes from the center of the front.

Next, as a second embodiment, FIGS. 5 and 6A and B show the engaging piece 6 of the first embodiment horizontally connected to the connector base 1 only at one end and the other end being a free end. The engaging claw 5 is provided in a protruding manner on the front surface of the free end, and the engagement is achieved by its elastic displacement as described above.

By designing the engaging claw 5 to intervene between the contacts without any play and to lock onto the upper surface of the edge of the common seat plate 3b without any play, the seat plate 3b and the connecting contact 3 for grounding can be The connector can be fixed in place to the base without rattling, floating, or shifting.

In the above embodiment, the protrusions 1b and 1c are used in combination depending on the implementation. The engaging claws 5 and the engaging pieces 6 may be arranged at a plurality of locations in a well-balanced manner depending on the length of the seat plate and the like.

Independent contacts 2 for signals arranged as above
The insulation coating of the flat cable is penetrated by the connecting contact 3 for grounding, and the conductor is press-fitted into the U-shaped slot to obtain pressure contact. 8 in the figure pinches the flat cable 4 between the connector base 1 and
This is a cover for obtaining the above pressure contact.

As a result, the conducting wire captured by the independent contact 2 is used as a signal line, and the conducting wire captured by the connecting contact 3 forms a ground line, so that each ground line is adjacent to the signal line.

In the embodiment, a plurality of holes 4a are provided in the flat cable 4.
, cut the conductor at the position where the hole was drilled, and connect the single-lead conductor that extends in one direction and the single-lead conductor that extends in the other direction with the signal contact and the ground contact. They are captured alternately to form two left and right signal lines and an adjacent ground line.
A case is shown in which a good crosstalk prevention effect is obtained.

As explained above, the present invention is suitable for use in flat cable connectors where one connector forms both a signal line and a ground line, and is particularly suitable for connection contacts such as a group of ground contacts. It is ideally suited for assembly to connector bases.

That is, connected contacts such as a group of grounding contacts are connected to each other by a common grounding base plate to form a common grounding structure, and it is not possible to provide individual contacts with press-fit legs such as independent contacts for signals. Although the structure is difficult, according to the present invention, it can be fixed precisely and easily in a fixed position on the connector base 1.

It is suitably put into practical use as a means for ensuring the upright position of the connecting contact and reliably preventing lateral displacement, floating, rattling, etc. In addition, it can be easily configured by integrally molding with the connector base without using other parts, and is not limited to the contact pattern of the above embodiment, but can be used to connect the connected contacts to the base when the bases of the individual contacts are connected by a seat plate. It can be implemented as a fixing mechanism as appropriate.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a connector showing the first embodiment of the present invention, Fig. 2 is an assembled perspective view of the same, Fig. 3A
The figure is a plan view of the same, FIG. 3B is a plan view showing the main parts of the connection contact seat plate attached, FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 2, and FIG. the second of
Exploded perspective view of a connector showing an embodiment, FIG. 6A
Figure 6B is a plan view of the same, showing the main parts of the connecting contact in the seat plate mounted state, Figure 7 is a perspective view of the connector with the cover removed, showing the flat cable in the press-connected state. FIG. 8 is a perspective view of the connector with the cover attached. 1... Connector base, 1a... Fitting part, 1b
...Protrusion, 1c...Positioning projection, 1d...
Hole, 2...Independent contact for signal, 2a...Touch piece, 2b...Male terminal, 3...Connection contact for grounding, 3a...Touch piece, 3b...Common seat plate, 3c...
... hole, 3d ... concave notch, 4 ... flat cable, 5 ... engaging claw, 6 ... engaging piece, 7 ... long groove,
8...Cover.

Claims (1)

[Scope of utility model registration request] In this connector, connecting contacts are formed whose lower ends are connected to each other by a common seat plate, and the seat plate of the connecting contacts is fixed to a connector base, so that each contact can be attached at once. an engaging pawl that is interposed in and locked to the upper surface of the edge of the common seat plate;
The engaging claw is supported by an elastically displaceable engaging piece integrally molded on the connector base, and the engaging claw is integrally molded and protrudes from the engaging piece to be locked onto the edge of the seat plate. A fixing mechanism for a connecting contact in a connector, characterized in that the engaging claw is locked to the upper surface of the edge of the seat plate by the elastic displacement movement of the engaging piece.