JPS6246957B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an improvement in a connector for collectively connecting flat cables.

Prior Art and Problems FIG. 1 shows a procedure for forming contacts in a conventional connector of this type. In the figure, 1 and 2 are contacts provided in two rows, and these are integrally formed on a ground base 3 made of a conductive material by pressing or the like. Contacts 1 and 2 are provided at the same pitch P, and contact 2 is located at the center of contact 1.
That is, the contacts 1 and 2 are arranged alternately at a pitch of 1/2P, and this is due to the inherent nature of the connector, which requires any contact to be connected to the ground line. The pitch P is four times the core wire pitch of the flat cable 4 connected to the connector. The contact 1 has a bent portion 5 in the middle and a cantilevered contact piece 6 bent at right angles at the tip. The contact 2 similarly has a bent portion 7 and a contact piece 8. The terminal portions 9 and 10 at the base of each contact 1 and 2 are naturally located on the same plane as the ground base 3. The connector 20 is constructed by insert molding the portions of the contacts 1 and 2 formed in this manner from the bent portions 5 and 7 to the terminal portions 9 and 10 using a mold 11 as shown in FIG. Actually, a mold (not shown) having protruding holes for fitting the contacts 1 and 2 is fitted and fixed in the part above the mold 11 of the connector 20, and the terminals of the mating connector are connected to this mold. It is connected to the contact pieces 6, 8 of each contact within the hole.

Flat cable 4 for this connector 20
To connect the flat cable 4, solder the core wire 12 (for the ground line, marked G in Figure 1) to the ground base 3, and connect the core wire 13 to the ground base 3.
This is done by soldering wires (designated with S in FIG. 1 for signal lines) to the terminal parts 9 and 10. Note that for contacts that are not connected to the ground line, the lower part of the terminal part is cut off (the part shown by the two-dot chain line in FIG. 1), and the core wire 13 is soldered onto this cut part.

In such conventional connectors, two rows of contacts are formed adjacently protruding from one ground base, and there is a limit to the arrangement pitch, so it is not possible to make the width of each contact sufficiently large. As a result, it is difficult to provide sufficient springiness to the contact portion, which causes a decrease in reliability when connecting the mating connector terminal. Further, in this case, since the terminal portions to be insert-molded are on the same plane, the molding die becomes complicated with an inclined surface as shown in FIG. In FIG. 3, reference numerals 14 and 15 indicate the shape of the contact holding portion of a sliding mold. The mold 14 has a plurality of protrusions 16 with inclined sides arranged in parallel at equal intervals, and the mold 15
A plurality of recesses 17 into which the respective protrusions 16 fit are arranged in parallel. During molding, the molding dies 14 and 15 are slid in the directions shown by the arrows, and the terminal parts 9 and 10 are pressed and held by the top surface of the protrusion 16 and the bottom surface of the recess 17 to perform molding. be exposed.

OBJECT OF THE INVENTION The present invention is intended to solve the above-mentioned various drawbacks, and provides a connector that can improve the reliability when connecting the connector and can simplify the structure of the mold die. It is an object.

Structure of the Invention In order to achieve the above-mentioned object, in the present invention, each row of contacts is formed on each side piece of a ground base having a U-shaped cross section, so that the development and punching width of each row of contacts can be increased. In addition to improving reliability during connector connection, the terminal portions of the contacts in each row are provided with locking portions that bend outward for positioning in the mold during insert molding.

Embodiments of the Invention Hereinafter, embodiments of the present invention will be described with reference to FIGS. 4 to 6.

FIG. 4 is a perspective view showing the procedure for forming contacts of the connector according to the present invention. In the figure, 21 is a ground base, and 22 and 23 are contacts provided in two rows.

The ground base 21 has a U-shaped cross section and is made of a conductive material.

The contacts 22 and 23 are connected to the ground base 21
It is integrally formed by pressing or the like. The contact 22 is connected to one side piece 2 of the ground base 21.
A plurality of terminal parts 25 are arranged in parallel at pitches P so as to protrude from 4, and a terminal part 25 at the base and a terminal connecting part 2 at the tip.
A locking portion 27 bent outward is formed between the locking portion 6 and the locking portion 6 . Further, a plurality of contacts 23 are arranged in parallel at pitches P so as to protrude from the other side piece 28 of the ground base 21, and are bent outward between the terminal portion 29 at the base and the terminal connection portion 30 at the tip. A curved locking portion 31 is formed. Locking part 2
7 and the locking part 31 are formed so as to be located between the contacts on the opposite side, the terminal part 29 projects straight from the side piece 28, and the terminal part 25 projects from the side piece 24 and once there is a After being bent, it is bent again so that the bent portion is located on the same plane as the terminal portion 29. The arrangement pitch P of each contact 22, 23 is four times the core wire pitch of the flat cable 4 connected to the terminal portions 25, 29 of each contact. Each terminal connection portion 26, 30 has a hole 32, 33 for inserting a terminal of a mating connector, and a cantilevered contact piece 34, 35 for connecting the terminal.

The portion of the contact 22 formed in this manner from the bent portion 36 to the locking portion 27 and the portion of the contact 23 from the bent portion 37 to the locking portion 31 are molded into a mold 38 as shown in FIG.
The connector 50 is constructed by insert molding. Although not shown in the drawings, a mold having a hole for fitting the terminal connecting portions 26 and 30 of each contact that protrudes from the mold 38 is fitted and fixed in a portion of the connector 50 above the mold 38. The terminals of the mating connector are inserted into holes 3 of each terminal connection part 26, 30 within this hole.
2, 33 and connected to each contact piece 34, 35.

Flat cable 4 for this connector 50
The connection is made by soldering the core wire 12 to the side piece 28 of the ground base 21 and soldering the core wire 13 to the terminal portions 25 and 29, as in the conventional case. In this case, the lower part of the terminal part of the contact not connected to the ground line is cut off, and the core wire 13 is soldered onto this cut part.

FIG. 6 shows the procedure for forming the mold 38 using a metal mold, and numerals 39 and 40 indicate the shapes of the contact holding portions of the sliding mold. The molding die 39 has a locking portion 27 of the contact 22.
The groove 41 that fits into the locking portion 31 of the contact 23
The mold 40 is provided with a groove 43 into which the locking portion 31 of the contact 23 fits, and a projection 44 that presses the locking portion 27 of the contact 22. During molding, each mold die 39, 40 is slid in the adjacent direction shown by the arrow, and the upper part of the locking part 27 that fits into the groove 41 (the part that is not molded)
is pressed by the projection 44, and the upper part of the locking part 31 that fits into the groove 43 is pressed by the projection 42, so that each contact 22,
23 is held and mold forming is performed.

Effects of the Invention As described above, according to the present invention, the following various excellent effects can be achieved.

(1) Each row of contacts is formed separately on each side of the ground base, which has a U-shaped cross-section, and the width of each row of contacts is approximately twice that of the conventional one, providing sufficient strength for the terminal connection area. Therefore, it is possible to improve the reliability when connecting the connector.

(2) Each contact is formed with a locking part that bends outward, and by simply forming grooves and protrusions corresponding to these locking parts in the mold, each contact can be bent without the need for a spacer. The structure of the mold can be simplified because molding can be performed while holding the mold.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the procedure for forming contacts of a conventional connector, Figure 2 is a diagram of the same molding procedure,
Fig. 3 is a diagram showing how to hold contacts using a ceride type mold, Fig. 4 is a perspective view showing how to form contacts in a connector according to the present invention, Fig. 5 is a diagram showing how to form the contacts using the same mold, and Fig. 6 is a diagram showing how to form contacts in the connector according to the present invention. FIG. 3 is a diagram showing how to hold a contact using a mold. In the figure, 4 is a flat cable, 12, 13 are core wires, 21 is a ground base, 22, 23 are contacts, 24, 28 are side pieces, 25, 29 are terminal parts, 26, 30 are terminal connection parts, 27, 31 is a locking part, 32, 33 are holes, 34, 35 are contact pieces, 3
6, 37 are bent parts, 38 are molds, 39,
40 is a molded metal fitting, 41, 43 are grooves, 42, 4
4 is a protrusion, and 50 is a connector.

Claims (1)

[Claims] 1 A first terminal bent outward between a first terminal part at the base and a first terminal connection part at the tip is attached to one side piece of a ground base having a U-shaped cross section and made of a conductive material. A plurality of first contacts having locking portions and protruding from one end surface of the side are integrally formed with a pitch four times the core wire arrangement pitch of the flat cable connected to the first contacts, and A second locking portion is provided on the other side of the gland base and is bent outward between the second terminal portion at the base and the second terminal connection portion at the tip, and protrudes from the end face of the side. multiple second contacts,
The same pitch as the first contact and the first contact.
a locking portion is located between the second contacts, and the second locking portion is located between the first contacts, and each locking portion of each contact is integrally formed. A connector characterized by insert molding the part extending from the bottom to each terminal part.