JPH047075B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a connector for a cable harness used for data transmission in information processing related equipment such as a computer, and more specifically relates to a connector for connecting each connector in a chain with a cable. The present invention relates to a connector that can be used for connecting daisy chain harnesses.

(Prior Art) In information processing equipment such as computers, it is necessary to transmit data processed in the equipment between each equipment, and various methods are used for this purpose. For example, as shown in FIG. 13, a header 2 is provided on a mother board 1, a printed board 3 on which various elements are mounted is attached to the header 2, and data is transmitted between each printed board 3 via the mother board 1. There is something I decided to do. However, in recent years, with the increasing density of various elements on the board 3, the amount of data to be processed has increased significantly, and there are cases where the amount of data transmitted is insufficient if only the motherboard 1 is used. It's coming.

(Problems to be Solved by the Invention) For this reason, as shown in FIG. 12, a cable harness 4 is made by attaching connectors 6 to both ends of a flat cable 5 having a plurality of electric wires 5a. 4 is attached to the header 3a, 3b provided at the tip of each printed circuit board 3, as shown in FIG.
It has been put into practical use to transmit data using In this case, each printed circuit board 3 is connected in a chain by a cable harness 4. For this purpose, two headers 3a, 3 are connected on each printed circuit board, as shown in the figure.
b), the header reduces the area for mounting various elements on the printed circuit board,
Furthermore, there is a problem that the number of headers and connectors increases.

(Means for Solving the Problems) The present invention has been made in view of the above problems. For example, in a daisy chain connection, each board can be connected by simply providing one header. The purpose is to solve the above problem by providing a connector that allows the connection to be made.
As a means for this purpose, the connector of the present invention is constructed as follows.

The connector of the present invention includes an insulating housing having a large number of plug terminal insertion holes formed in two rows, a receptacle terminal at one end, a cable connection section at the other end,
a contact plate having a bent portion bent toward the other side in the center; a tab plate having a cable connection portion at one end; and a tab plate having a bent portion bent toward the bent portion of the contact plate at the other end; and a plurality of contacts in which the bent portions of the tab plates are arranged back to back, and the contact plates and the tab plates of the contacts are alternately arranged in reverse along the row direction of the plug terminal insertion holes, and the adjacent two
The receptacle terminals of each of the contacts are inserted into opposing plug terminal insertion holes.

(Function) When using the above connector, connect the connection terminal of the second external circuit (board) to one of the two connecting legs via a cable, and connect the third external circuit (board) to the other. Terminals are connected via cables to form a daisy chain, or one of the connecting legs of some of the contacts is connected to a connecting terminal of a second external circuit (board), and the remaining contacts are connected. Connection between each external circuit (board) can be made by connecting one of the legs to the connection terminal of the third external circuit (board), and providing one connector for each external circuit (board). can be made to do so.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a daisy chain connector according to the present invention, and this connector 70 includes a pair of upper and lower center housings 12 and 13 made of an insulating material and a pair of upper and lower cover housings 1.
The housing 10 integrally includes a housing 10 consisting of 4 and 15 and a plurality of contacts 30.
A contact assembly 40, which will be described later, is held within the contact assembly. Each contact 30 of this contact assembly 40 has a receptacle terminal 31 at one end that engages a plug terminal of an external circuit.
The receptacle terminal 31 has a housing 1
The plug terminal insertion holes 11a are arranged to face a plurality of plug terminal insertion holes 11a, which are formed in two rows in the horizontal direction and at equal intervals on the front end surface of the housing. The other end of the contact 30 has two connecting legs 3 that are bifurcated as described later.
2, 33, and these connecting legs 32, 33
The ends of electric wires 51, 51, . . . 51 of two different flat cables 50, 50, respectively connected to other external circuits (not shown), are joined to the terminals. In addition, among the electric wires 51, the electric wire indicated by 51a in the figure is a ground electric wire, and is connected to the connecting leg of the contact that engages with the ground terminal of the external circuit, and the electric wire indicated by 51b in the figure is a signal electric wire. Yes, and joins with the connecting leg of the contact that engages with the signal terminal of the external circuit.

2 shows a cross-section of the connector 70 taken along the arrow - in FIG. 1, and FIG. 3 shows a cross-section of the contact assembly 40 of the connector 70. As can be seen from these figures, contact 30
The contact plate 30 has a receptacle terminal 31 at one end, a connecting leg 33 constituting a cable connection section at the other end, and a bent section bent toward the other end at the center.
a, and a connecting leg 3 forming a cable connection at one end.
2. A tab plate 30b, which is a short plate having a bent part bent toward the bent part of the contact plate at the other end, is integrally joined at the middle part of the contact plate 30a. A plurality of contact assemblies 40 are formed by arranging them at regular intervals. Further, as shown in FIG. 2, the receptacle terminals 31 of each contact 30 are held in two rows in the center housings 12 and 13 facing the insertion holes 11a. The joining legs 32, 33 extend upwardly within the center housings 12, 13. Core wires 51 of different flat cables 50 are joined to the joining legs 32, 33, and the flat cable portions adjacent to the core wires 51 are connected to the center housings 12, 13, the cover housing 14,
It is clamped and fixed between 15 and 15. in this way,
By integrally forming the two joining legs 32, 33 and the engagement terminal 31, each core wire 51 of each flat cable 50, 50 joined to these joining legs,
51 and a plug terminal 61 attached to an external circuit (board) 60 inserted into the receptacle terminal 31
will be electrically connected to connector 7.
0 can connect two flat cables 50, 50 in a daisy chain.

Next, the manufacturing of the contact assembly 40 is carried out in the fifth step.
This will be explained with reference to FIGS. 7 to 7. First, a metal plate is punched and formed into a shape having a receptacle terminal 31 at one end and a connecting leg 33 at the other end, as shown in FIG.
A contact plate 30a having a contact plate 30a and a tab plate 30b having only a connecting leg 32 are arranged in a horizontal direction. At this time, as can be clearly seen from FIG. 4, the receptacle terminals 31 of each contact plate 30a are
It is formed so as to extend between a pair of adjacent joining legs 32 and 33 and is laterally displaced by a half pitch. Next, insert molding 16 (omitted in FIGS. 6 and 7) is applied as shown by the two-dot chain line in the figure, and after this, the signal contact plate and the signal tab plate are cut away from the ground plate.
forming a contact subassembly; In the case of this figure, the contact plate on the left end and the tab plate on the right end are used for the ground, so only the connecting legs of the contact plate on the left end and the tab plate on the right end are the ground that extends laterally at the rear end. Board 3
It is connected to 5.

This contact subassembly will be further described with reference to FIG. In this figure, for convenience, each receptacle terminal 31 is shown as 31 in order from the right.
a, 31b, 31c..., and similarly each joint leg is 3
2a, 32b, 32c... and 33a, 33b,
33c... Each of the contact plates 30a and tab plates 30b, which are stamped and formed, has the same shape and is held by the insert mold 16 with their joining legs (core wire connection parts) arranged alternately and at the same pitch (for example, 1.27 mm pitch). ing. And each receptacle terminal 31a, 31
b, 31c, ... are each pair of joint legs 32a and 33
a, 32b and 33b, 32c and 33c .

Next, as shown in Fig. 6, two contact subassemblies made as shown in Fig. 5 are prepared and placed back to back, and then they are brought into contact as shown in Fig. 7. , both subassemblies are welded together at this abutting part,
A contact assembly 40 is made. In joining these two contact subassemblies, the contact plate 30a and tab plate 30b of the upper subassembly abut against the tab plate 30b and contact plate 30a of the lower subassembly, respectively,
Also, receptacle terminal 3 of the upper subassembly
1 is the receptacle terminal 3 of the lower subassembly
1, and are positioned at equal intervals vertically and horizontally and in accordance with the arrangement of the insertion holes 11a of the housing 10, and the above-mentioned joining is performed. The connection legs of the signal contact plate and signal tab plate of the contact assembly 40 configured in this manner (other connection legs excluding the connection legs at both ends in FIG. 7) have corresponding signal core wires of the flat cable 50. 51b are respectively connected, and on the other hand, a ground core wire 51a is connected to the ground connecting leg and a ground plate 35 that is connected to the ground connecting leg and extends laterally. Thereafter, the contact assembly 40 to which the cables 50, 50 are connected is inserted into the housing 10 and fixed, thereby obtaining the connector shown in FIG. 1.

In the above example, the contact assembly 40 is formed by welding both subassemblies together in the state shown in FIG. 7, and then the core wire of the flat cable 50 is connected. First, connect the flat cables, then install the two contact subassemblies back to back into the housing 10, and in this assembled state, weld the two subassemblies together through the openings 12a, 13a of the center housings 12, 13. The contact assembly may be formed by performing the following steps.

Connector 70 (8th
FIG. 9 shows an example in which a plurality of printed circuit boards are electrically connected to each other using flat cables 50 connected in a daisy chain as shown in FIG. In this case, a plurality of printed circuit boards 3 are connected to the mother board 1 by the headers 2, and the printed circuit boards are connected to the connector 7 via the header 3c.
Connected to 0. Therefore, a signal transmitted via the flat cable at the left end in the figure is sent via one connector 70 to the printed circuit board (external circuit) 3 at the left end, and at the same time is sent from that connector 70 to the next connector 70 ( In the figure, the data is sequentially transmitted to the printed circuit board 3 in the center via a flat cable 50 connected in a daisy chain manner to a connector 70 located in the center, and then to the printed circuit board 3 located at the right end.

In the above example, the core wire 51b of the flat cable 50 connected to the connection terminal of the second external circuit (board) is attached to one of the two bifurcated connecting legs 32, 33 of each contact 30. is connected to the core wire 51b of the flat cable 50, which is connected to the connection terminal of the third external circuit (board) on the other side.
is connected, and when the receptacle terminal 31 is engaged and connected to the plug terminal 61 of the first external circuit (board) 60, the terminals of the first to third external circuits (board) are connected together via the contact 30. The case where a daisy chain connection is made has been explained. However, multiple bases 3 as shown in FIG.
Even if a connection is made between the left board 3 and the center board 3 in FIG.
In many cases, the signal lines that are connected to the terminal are wired so that they are not connected to each other. For this reason, examples of wiring as described above using the connector 70 of the present invention are shown in FIGS. 10 and 11.
As shown in the figure.

As shown in FIG. 10, in this example, the same contact assembly 40 as described above is used. For convenience of explanation, the receptacle terminals 31 in the upper row are 31a, 31b, . . . 3 from the right in the figure.
1k, and the upper joint legs of the bifurcated joint legs are 32a, 32b, ...32 from the right in the figure.
k (joint leg on the tab plate 30b side) and 33a, 3
3b,...33k (joint leg on contact plate 30a side)
The connection between the core wires 51a and 51b of the flat cable 50 on the upper side of the figure and the joining legs arranged in a row on the upper side will be explained. As shown in the figure, the ground core wire 51a is connected to the ground plate 35 extending horizontally.
Each signal core wire 51b is connected to the connecting legs 33a, 33 on the contact plate 30a side in order from the right.
b,...33k. ground board 3
5 is integrally joined to the contact plate 30a at the right end and the contact plate 30a at the left end, and the receptacle terminals 31a, 31k at the left and right ends are connected to the ground terminal of the first external circuit 60. Of the receptacle terminals in the upper row, the remaining receptacle terminals 31b, 31c, .
Connected to 1. Note that each signal core wire 51b of the lower flat cable 50 is connected to the contact plate 30a connected to each receptacle terminal 31 in the lower row.
Each ground core wire 51a is connected to the lower ground plate 35.
That is, the upper flat cable 50 in FIG. 10 is connected to the plug terminal 61 of the first external circuit 60 via the receptacle terminal 31 in the upper row, and the lower flat cable 50 is connected to the receptacle terminal 31 in the lower row. The plug terminals 61 of the circuit 60 are connected to each other through the plug terminals 61 of the circuit 60. In this way, as shown in FIG. 9, it is possible to connect each board 3 using one connector 70 of the present invention for each board 3, but in this case, , connections are only made between terminals for each adjacent board, and daisy chain connections of core wires as shown in FIGS. 1 to 7 are not made.

(Effects of the Invention) As described above, in the present invention, the contact plates and the tab plates, each having a cable connection portion, are alternately arranged in reverse along the column direction of the plug terminal insertion hole, and the receptacle terminals of two adjacent contacts are arranged in reverse order. Since the terminals are inserted into the opposing plug terminal insertion holes, the arrangement density of the terminals can be increased. Therefore, the horizontal length of the connector can be reduced, the area occupied by the connector on the printed circuit board can be reduced, and the arrangement of various elements on the printed circuit board can be made high density. Furthermore, since each contact plate and tab plate has a cable connection part, the first
The terminals of the printed circuit board that constitute the external circuit of
There is also no need to add another connector when connecting the terminals of the printed circuit board constituting the third external circuit via a cable.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one example of a daisy chain connector according to the present invention, FIG. 2 is a sectional view showing the connector along the arrow - in FIG. 1, and FIG.
The figure is a front view showing only the contacts taken out from Fig. 2, Fig. 4 is a sectional view showing the connector along the arrow - in Fig. 2, and Figs. 5 to 7 are manufacturing of the contact assembly. Fig. 8 is a perspective view showing a flat cable connected in a daisy chain using the connector according to the present invention, and Fig. 9 is a perspective view showing a flat cable connected in a daisy chain using the connector according to the present invention. FIG. 10 is a perspective view showing a different example of the connector according to the present invention, FIG. 11 is a cross-sectional view showing the connector of FIG. 10, and FIG. 12 is a conventional connector used as a flat cable. FIG. 13 is a perspective view illustrating an example of attachment, and a front view illustrating an example of a daisy chain connection of printed circuit boards using the above-mentioned conventional connector. DESCRIPTION OF SYMBOLS 10... Housing, 11a... Plug terminal insertion hole, 30... Contact, 30a... Contact plate,
30b...Tab plate, 31...Receptacle terminal, 3
2,33...Joint leg.

Claims (1)

[Claims] 1. An insulating housing having a large number of plug terminal insertion holes formed in two rows, a receptacle terminal at one end, a cable connection portion at the other end, and a contact having a bent portion bent toward the other end in the center. a tab plate having a cable connection portion at one end and a bent portion bent toward the bent portion of the contact plate at the other end; the contact plate and the bent portions of the tab plate are arranged back to back; a plurality of contacts, wherein the contact plates and tab plates of the contacts are alternately arranged in reverse along the column direction of the plug terminal insertion holes, and the receptacle terminals of two adjacent contacts are opposed to each other. A connector characterized by being inserted into an insertion hole.