JPS6348395B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector equipped with a press-contact type terminal, and particularly to a connector having a structure in which two conductors can be connected to one terminal.

Conventionally, in connectors used to connect multiple conductors to other devices, such as so-called flat cables in which multiple conductors are buried in parallel in a soft insulating sheet, or ordinary insulated wires, each conductor of the cable or wire is When connecting a conductor to a terminal of a connector, instead of soldering or welding, prepare a slit with a width slightly smaller than the diameter of the conductor to be connected at one end of the terminal, and press-fit the conductor into the slit to connect the conductor. Various types of so-called press-contact type connectors are used in which connection can be made by press-contacting the end face of the slit and the end face of the slit. According to this connector, even when connecting multiple conductors, the operation for connecting the wires is easy and quick, and the shape is small and simple, but on the other hand, it is usually possible to connect one slit. Because only one conductor can be connected, for example, even if the conductors can be connected to each other, as many slits or terminals are required as there are conductors that need to be connected individually, and if there are many conductors, many terminals are required. The disadvantage was that the connector was large.
The conductor arrangement of flat cables normally used for computers etc. is such that a ground wire G is placed between signal wires S. For example, -S-G ₁ -G ₂ -S
- Two ground wires between the signal wires, such as
If G ₁ and G ₂ are arranged, the ground line G ₁ and
It becomes necessary to shoot G ₂ and connect these two wires to the same ground terminal.

The present invention solves the above-mentioned drawbacks by easily selecting the shape of the connection part of the terminal, the shape of the surface of the cover that cooperates with the connection part to hold the conductor of the electric wire, and the combination of the two. To provide a press-contact type connector capable of simultaneously connecting two conductors to a slit of one terminal, also serving as mutual connection, and having a small size and a simple structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a press-contact type connector (hereinafter referred to as the present connector) according to the present invention will be described below with reference to the drawings.

FIG. 1 is a partially omitted perspective view showing a state in which this connector is separated into an insulator 10 and a cover 30, and each conductor of a flat cable 50 to be connected is exposed and laid on the cover. It is. The insulator 10 is a substantially rectangular block made of an insulator, and terminals 20 are penetrated from one surface to the other and fixed by means such as press-fitting or molding, and are arranged in a staggered manner. The terminal 20 is made of an elastic metal plate and has a connection portion 21 at one end and a pin-shaped contact 22 at the other end. The connection section 21 has a structure as shown in FIG. 2, with a slit 23 having a width slightly smaller than the diameter of the conductor to be connected, and a fan-shaped guide surface 24, 24' extending toward the tip continuously from the slit 23, and a slit. and shoulders 25, 25', which are points of continuity with the guide surface. If the angles formed by the center line L of the slit and the guide surfaces 24, 24' are respectively θ ₁ and θ ₂ , then θ ₁ =θ ₂ . Also, the guide surface 2 expressed in horizontal length
The maximum width between 4 and 24' is at least greater than the maximum spacing between two conductors to be connected. In FIG. 1, the cover 30 is a substantially rectangular block made of an insulator, and has a surface 31 facing the insulator 10.
A plurality of holding grooves 40 are carved perpendicularly to the longitudinal direction of the cover, and each holding groove has one terminal insertion hole 32 into which the connecting part 21 of the terminal is inserted. They are perforated in a staggered manner at positions orthogonal to each other and corresponding to the respective terminals 20. The terminal insertion hole 32 has a rectangular opening slightly larger in size than the cross section of the wire connection portion 21 and has a depth sufficient to allow the wire connection portion 21 to be completely inserted. The flat cable 50 has its insulation coating removed for a required length to expose the conductor 51, and a holding groove 40-n corresponding to each terminal to which the conductor is to be connected is formed.
to be laid inside. For example, in FIG. 1, the holding groove 40-
1, 40-3 has two conductors, and 40-2
A single conductor is installed. The holding groove 40 has several shapes, and the connection method is slightly different depending on the shape, but the function is the same. Next, FIG. 3 shows examples of each shape of the holding groove 40, in which figure a shows the holding groove A40a, figure b shows the holding groove B40b, figure c shows the holding groove A40a, and figure c shows the holding groove B40b.
shows the holding groove C40c, and d shows the holding groove D40.
d is shown in cross section. First, the holding groove A40a
is a semicircular bottom surface 41 having a radius R that is approximately equal to or slightly smaller than the radius of the conductor to be connected.
, side surfaces 42, 42' which are continuous with the bottom surface 41 and are parallel to each other and opposite each other (therefore, the width between the side surfaces is approximately equal to or slightly smaller than the diameter of the conductor), and the side surface 4
2, 42' and slopes 44, 44' which are continuous at shoulders 43, 43' and formed in a fan shape outward, and the height from the lowest end of the bottom surface 41 to the shoulder 43 or 43'. is at least twice the diameter of the conductor to be connected, and in particular, if the angles formed by the center line M including the bottom and side surfaces and the slopes 44, 44' are θ ₃ and θ ₄ , θ ₃ = θ ₄ , and the maximum width between the slopes 44, 44' expressed in horizontal length is at least larger than the distance between the two conductors to be connected. Next, the holding groove B40b has the above angles θ ₃ and θ ₄ such that θ ₃ >θ ₄ , and the shoulders 43 and 4 accordingly.
It is the same as the holding groove A40a except that the height from the bottom surface is different from that of the holding groove A40a. Unlike the holding grooves A or B, the holding groove C40c has no parallel side surfaces, and is continuous with the bottom surface 41 and has a radius R that is approximately equal to or slightly smaller than the radius of the conductor to be connected, and is formed in an outward fan shape. Furthermore, if the angles formed by the center line M drawn perpendicularly to the surface 31 from the bottom surface 41 and the slopes 44, 44' are θ ₄ and θ ₄ , then θ ₃ =θ ₄ . It is configured as follows.
Further, the maximum width between the slopes 44 and 44' is the same as that of the holding groove A or B described above. The holding groove D40d is the same as the holding groove C40c except that the angles θ ₃ and θ ₄ are such that θ ₃ <θ ₄ .

In order to connect two conductors to one connection part when connecting a flat cable, for example, using the connection part 21 and the holding groove 40 configured as described above, the following method should be used for each shape of each holding groove. This is done in each wiring procedure. First, FIG. 4 shows the case of the holding groove A40a, where the center line M of the holding groove A and the center line L of the connection part 21 are
Make them match and face each other. Conductors 51a and 51b of the flat cable to be connected
are arranged so that the center line N between the conductors is slightly deviated to one side with respect to the center line M of the holding groove A40a. (Figure 4a) Then, when a force is applied to the conductor in the direction of the arrow, the conductor descends between the slopes 44 and 44',
Since the center line N of the conductor is offset as described above, the conductor 51a is formed and reaches the slope 44. (Figure 4b)
The conductor 51a is delayed in its subsequent descent due to frictional resistance with the slope 44, but the conductor 51b is lowered by the slope 44.
4', and first reaches the shoulder 43', so by applying further force to the conductor (FIG. 4c), the conductor 51b goes down, the conductor 51a goes up, and the conductor 51b goes down, and the conductor 51a goes up, between the side surfaces 42 and 42'. It fits in and reaches the bottom surface 41. (D in the same figure) In this state, connect the connection part 21 to the conductors 51a and 51b.
When pressed upward, the conductor will touch the bottom surface 41 and the side surface 4.
2 and 42', the two are press-fitted into the slit 23 while being connected vertically, and the 1
This means that two conductors are connected to each slit. (e in the same figure) Next, FIG. 5 shows the case of the holding groove B40b. In this case, unlike the example of holding groove A, the conductor 5 to be connected is
The center lines N of 1a and 51b are arranged so as to coincide with the center line M of the holding groove B40b. (Figure 5a)
When a force is applied to the conductor in the direction of the arrow, the conductor descends between the slopes 44 and 44', but as mentioned above, the slopes 44 and 44' have different inclination angles and the height of the shoulder 43 is higher. As shown in FIG. 5b, the conductor 51a first reaches the slope 44. and conductor 51
The subsequent lowering of conductor 51b is delayed due to frictional resistance with slope 44, and conductor 51b descends first and reaches shoulder 43' (see figure c). As in the case, the conductor 51b
with the conductor 51a on the bottom and the side surfaces 42, 42'
It fits in between and reaches the bottom surface 41. (D in the same figure) The point that the connection is made by pressing the connection part 21 from above is the same as in the case of the holding groove A.

FIG. 6 shows a case where the holding groove C40c is used, and the center line N of the conductors 51a and 51b to be connected is the holding groove C40c.
The flat cable is arranged so that it is slightly deviated to one side from the center line M of the cable. (Fig. 6a) Then, when the force of the arrow is applied to the conductor, the conductor slopes 44, 44'
However, since the conductor is biased as described above, the conductor 51a first falls on the slope 44 as shown in FIG. 6b.
The conductor 51b descends first and reaches the slope 44' due to frictional resistance with the slope, and the conductor 51b descends first and reaches the slope 44', and the conductor 51b is at the bottom and the conductor 51a is at the top, reaching the bottom surface 41. reach When the connection part 21 is pressed against the conductor in this state (d in the same figure), the conductor is lined up diagonally on the slope 44, but the guide surface 24 of the connection part pushes the conductor 51a, so the force generated by the guide surface is applied. Then, the conductor 51a slides in the direction of the slit 21, reaches the entrance of the slit, and is press-fitted into the slit, and then the conductor 51b is also press-fitted, so two conductors are connected to one slit as in the above example. That means that. (e in the same figure) FIG. 7 shows the case of the holding groove D40d. In this case, the center line N of the conductors 51a and 51b to be connected
is arranged so that it coincides with the center line M of the holding groove D. (Fig. 7a) Then, when the force of the arrow is applied to the conductor, the conductor descends between the slopes 44 and 44', but since the angle of inclination of each slope with respect to the center line is different, the conductor 51a as shown in Fig. 7b First, the conductor 51b reaches the slope 44 and its descent is delayed due to frictional resistance with the slope.
The one descends first and reaches the slope 44' (c in the same figure).
Thereafter, the conductor 51b is on the bottom and the conductor 51a is on the top to reach the bottom surface 41, and the two conductors are press-fitted into the slit by pressing the connection part 21 against the conductor (see figure d), and the connection is made. Retaining groove C in Figure 6
This is exactly the same as in the case of . (Fig. 8 e) Next, Fig. 8 shows another embodiment of this connector, in which a cover 60 having a structure different from that of the cover 30 in Fig. 1 is used, and the shape of the pressure contact part is partially different. It has the same structure as the connector of FIG. 1, except that terminals can also be used. First, cover 60 is cover 3
Although it is a block made of an insulator like 0, there is no holding groove on the surface 61, and terminal insertion holes 62 into which the connection parts 21 of the terminals are inserted during connection are drilled in a staggered manner at positions corresponding to each terminal 20. However, the shape of the terminal insertion hole is the same as that of the cover 30. In FIG. 8, other terminals and insulators are omitted. FIG. 9 shows a connection procedure for connecting two conductors to one connection part in the connector shown in FIG. 8. That is, the terminal insertion hole 6
2 center line P and the center line L of the connection part 21 of the terminal 20
Make them match and face each other. Conductors 51a and 51b of the flat cable to be connected
are arranged on the surface 61 so that the center line N between them is slightly biased to one side with respect to the center line P of the terminal insertion hole. (FIG. 9a) Then, when the connection part 21 is pressed toward the conductor, the conductor 51 first as shown in FIG. 9B.
a corresponds to the guide surface 24 of the connection part 21, but the conductor 51
b has not yet hit the guide surface. When the connection part is further pressed, the conductor 51a is pushed into the terminal insertion hole 62 due to the frictional resistance with the guide surface 24 and descends a little, but the conductor 51b hits the guide surface 24' later, so that it is above the conductor 51a. Therefore, the entrance of the slit 23 of the connection portion is reached first, and the conductor 51a is at the bottom. (Figure c) If you press the connection part as it is,
The conductor is supported by the surface 61 and the terminal insertion hole 62
The conductor 51b is not pushed in and the conductor 51a is on top.
are pressed into the slit 23 so that the two conductors are connected to one slit. (d and e in the same figure) FIG. 10 shows an example in which the connecting portion of the terminal has a different shape, and the shape of the connecting portion 26 is the 10th one.
As shown in Figure a. That is, the shape of the slit 23 in the connection part 26 is similar to that of the connection part 21, but when the angles formed by the guide surfaces 24 and 24' with the center line L of the slit 23 are θ ₁ and θ ₂ , θ ₁ >θ ₂ . Therefore, the distances of the shoulders 25 and 25' from the tip of the guide surface are not equal. Other guide surface 2
It is the same as the connection part 21 in that the maximum width between 4 and 24' is larger than the interval between the two conductors to be connected. Then, the center line P of the terminal insertion hole 62 and the connection part 2
The conductors 51a and 51 to be connected are made to face each other so that the center lines L of the slits 6 and 6 coincide with each other.
b is also arranged on the surface 61 with its center line N aligned with the center line P of the terminal insertion hole. (Fig. 10b) Next, when the connecting portion 26 is pressed toward the conductor in the direction of the arrow, the conductor 51a hits the guide surface 24 first because the inclinations of the guide surfaces 24 and 24' are different.
b has not yet hit the guide surface. When the connection part is further pressed, the conductor 51a is pushed into the terminal insertion hole 62 due to the frictional resistance with the guide surface 24 and descends slightly, but since the conductor 51b hits the guide surface 24' later, the conductor 51b is placed above the conductor 51a. Therefore, the shoulder 25' of the connection portion is reached first, and the conductor 51a is at the bottom.
(FIG. 9d) If the connection portion is pressed as it is, the conductors 51a and 51b are successively pressed into the slit 23 and connection is performed, just as in the case of FIG. 9. (Fig. 10e) Fig. 11 shows still another embodiment of this connector, in which two mutually independent insulated wires are connected to one connection part without the need to remove their insulation coatings in advance. This is an example of a method of wiring. In this case, the connection part 26 of FIG. 10 is used as the connection part of the terminal 20. Note that the terminals are fixed to the insulator in the same manner as in FIG. 1, but the insulator is omitted in FIG. 11, and the cover is omitted except for the main parts. The cover 70 is provided with wire receiving grooves 71, 71' having a U-shaped cross section and having a depth approximately equal to the diameter of the wires to be connected in parallel on the surface 72, and insulated wires 80, 80' are placed in the grooves. The distance between the wires is determined by the guide surface 24 of the connection part,
The width shall not be greater than the maximum width between 24'.
Further, a terminal insertion hole 73 is formed on the surface 72 as in the case of the cover 30 or 60. The procedure for connecting electric wires with this configuration is as follows.
First, as shown in FIG.
When the center lines Q between 0' and 0' are aligned, and the connecting portion 26 is pressed toward the electric wire in the direction of the arrow, the electric wire 80 first hits the guide surface 24 of the connecting portion, as in the case of FIG. The electric wire 80 is pushed into the terminal insertion hole 73 slightly due to the frictional resistance with the guide surface 24, but since the electric wire 80' hits the guide surface 24' later, the electric wire 80' is on top as shown in FIG. 12c. The wire 80 goes down and reaches the shoulders 25, 25'.
Then, by further pressing the connection part, the electric wire 80
and 80' are torn by the shoulders 25, 25' to expose the internal conductors 81, 81', but as in the previous example, the width of the slit 23 at the connection part is smaller than the diameter of the conductors 81, 81'. Since the conductors are slightly smaller, each conductor is press-fitted into the slit 23 and connected. (D in the same figure) In Fig. 12, the case where there are two electric wires and one terminal has been explained, but the same is basically the same even if the number of electric wires and the number of terminals increases.

In each of the above embodiments, the configuration and procedure for connecting two conductors to one connection part were explained in accordance with the purpose of the present invention.
There is no need to explain that even in the case of a book, wires can be wired using the same procedure with the above-described structure of the wire connection portion, holding groove, or cover. It goes without saying that the present invention is not limited to the above-mentioned embodiments, but includes various types based on the technical idea of the present invention.

As described above, according to the pressure contact type connector of the present invention, the shape of the connection portion of the terminals arranged in the insulator, the shape of the holding groove for holding the conductor provided in the cover, and the relative position of the conductor of the flat cable can be combined. By selecting the appropriate connector, you can easily connect two conductors of a flat cable to the slit of one insulation displacement terminal at the same time, which also serves as a connection between the two conductors, reducing the number of terminals required and making the connector smaller, making it ideal for computers, etc. It can contribute to the miniaturization of

[Brief explanation of drawings]

Fig. 1 is a perspective view of the connector of the present invention separated into an insulator and a cover, Fig. 2 is a view showing the structure of the terminal connection part, Fig. 3 is a cross-sectional view showing each shape of the holding groove, and Fig. 4 to 7 are diagrams showing the connection procedure for each shape of the holding groove, and FIG. 8 is a partially omitted perspective view of another embodiment of the connector of the present invention.
9 and 10 are diagrams showing the connection procedure in the connector of FIG. 8, FIG. 11 is a partially omitted perspective view of still another embodiment of the connector of the present invention, and FIG. 12 is a diagram showing the connection procedure of the connector of FIG. It is a figure which shows the connection procedure in the connector of the figure. 10...Insulator, 20...Terminal, 2
1, 26... Connection section, 23... Slit, 24,
24'... Guide surface, 30, 60, 70... Cover, 31... Surface, 32, 62, 73... Terminal insertion hole, 40, 40a, 40b, 40c, 40d...
Retaining groove, 41... bottom surface, 42, 42'... side surface,
44, 44'... Slope, 50... Flat cable, 51, 51a, 51b, 81, 81'... Conductor, 80, 80'... Insulated wire.

Claims (1)

[Claims] 1. A terminal having a connection portion formed by a slit having a width smaller than the diameter of the conductor to be connected at one end and a guide surface continuous with the slit and forming a fan shape toward the tip, and an insulator in which the above-mentioned terminals are arranged; In a pressure contact type connector comprising a cover on one side of which the conductor is placed and a terminal insertion hole into which the connection portion of the terminal is inserted, two adjacent conductors are placed side by side on the cover. By making the opening width of the fan-shaped guide surface connected to the slit of the terminal connection part larger than the spacing between the two conductors and making a difference in left and right angles, or by making a holding groove with a similar fan-shaped slope on the cover side. or by positioning the conductors so that the center line of the two conductors is offset to one side from the center line of the connection part or the holding groove, the two conductors can be arranged vertically with a difference in feeding. A press-contact type connector characterized by a structure in which the connectors are aligned and press-contacted to one connection part.