JP3285519B2 - IDC electrical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press-connecting electrical connector.

[0002]

2. Description of the Related Art As a connector of this type, for example, a connector disclosed in Japanese Utility Model Publication No. 6-25897 is known. In this connector, as shown in FIG. 8 of the accompanying drawings, a cable arrangement hole 52 and a terminal insertion groove 53 are formed in a housing 51 made of an insulating material. The cable arrangement hole 52 is closed on one side of the housing 51 so that a plurality of cables C can be inserted in a row in the lateral direction. On the other hand, each terminal insertion groove 53 is opened upward and is located above them corresponding to each cable C, and guides a plate-like terminal on both side edges thereof. or,
The terminal insertion groove 53 is partially formed at the bottom thereof with the cable arrangement hole 52.
Is in communication with The plate-shaped terminal 54 is made of a metal plate, and when inserted into the terminal insertion groove 53 to a predetermined position, an upper edge protruding from the terminal insertion groove 53 is formed as a contact portion 55, A connection portion 57 projecting from the edge 56 in a triangular blade shape is provided. At the time of press-connecting, when the terminal 54 is inserted to a predetermined position, that is, the bottom edge 56 is inserted to a position where it abuts against the bottom of the terminal insertion groove 53, the connecting portion 57 bites into the sheath of the cable C and , And thus a pressure-welded connection is made.

When the connector is used, the connector is fitted into a receiving hole of a mating connector (not shown), and an elastic contact of the mating connector is connected to the upper edge of the terminal 54, that is, the contact portion 55. .

[0004]

However, the conventional connector shown in FIG. 8 sometimes causes problems such as poor press-fitting and breakage of the core wire at the time of press-connecting. In this connector, since the core wire of the cable C is located on the moving surface when the terminal 54 is inserted, when the terminal 54 and the cable C are displaced in the thickness direction of the terminal 54, the connection portion 57 is In some cases, the core wire is disengaged from the core wire and does not sufficiently contact with the core wire or does not contact at all. This is due to a positional error between the terminal insertion groove 53 and the cable arrangement hole 52, or an escape due to deformation of the cable C when the connection portion 57 starts to bite into the cable C. This is particularly noticeable when the cable is thin.

Further, when the triangular blade-shaped connection portion 57 protrudes into the core of the cable core, the protruding amount may be too large and the core may be broken. The amount of intrusion can be adjusted by appropriately setting the distance between the tip of the connection portion 57 and the bottom edge 56 of the terminal 54. However, if the cable escapes or deforms, the amount of intrusion also becomes unstable.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of a conventional connector and to provide a press-connecting electrical connector in which a press-connecting terminal makes reliable and stable contact with a core wire.

[0007]

According to the present invention, there is provided a press-connecting electrical connector in which a connection portion of a press-connecting terminal forms a blade-like portion, and the blade-like portion bites into a coating of a cable and is press-connected to a core wire. Has become.

In such a connector, in the present invention, a housing groove for accommodating the press-contact terminal and the cable and a holding groove at a corresponding position on the opposite surface are formed on one surface of the housing.

[0009] The pressure contact terminal causes the deflection of the cable in the width direction at the longitudinal direction at two positions located on the mutually opposite side in the width direction of the receiving groove in the tapered side surface of the accommodating groove in the housing groove Together with the inner wall of the receiving groove
A guide piece that, between the two guide pieces at the longitudinal direction, with and a blade-like portion where the cable is provided in the widthwise center position of the receiving groove is placed, furthermore, the Retention
It also has a fixed arm that fits into the groove .

[0010] A lid member can be attached to the housing, and at the time of attachment, the cable arranged on the blade-shaped portion in the accommodation groove is pressed.

In the present invention, it is preferable that the press contact terminal has a regulating step for regulating the amount of biting of the blade into the cable in the vicinity of the blade.

According to the connector of the present invention, the cable arranged in the housing groove is positioned so as to be biased in the opposite direction to the width direction of the housing groove by the two guide pieces provided on the terminal. Become. That is, the cable is inclined in the width direction in a range between the two guide pieces located on the opposite sides in the width direction from each other in the receiving groove. This means that the cable is always directly above the blade at the intermediate position between the two guide pieces in the longitudinal direction and at the central position in the width direction for the pressure connection. I do. In such a state, if the cable is pressed against the blade by the lid member,
The blades naturally reach the core of the cable.

In the present invention, when the regulating step is formed on the blade, the regulating step restricts further biting by the actual biting amount of the blade into the cable. Obtain the correct bite amount.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG.
An embodiment of the present invention will be described based on the above.

In the electric connector 1 according to the present embodiment shown in FIG. 1, a cover member 3 is mounted on a housing 2 accommodating a press contact terminal and a cable C, and these are held by a holder 4.

As shown in FIG. 2, which is a perspective view showing the connector 1 of FIG. 1 in a state where each member is separated, and FIG. 3, which shows respective surfaces and cross sections of the housing and the lid member, the housing 2 is insulated. It is made of a block made of a material, and has terminals 5 and a plurality of receiving grooves 6 for cables C on the upper surface.
On the lower surface, holding grooves 7 are formed in parallel to each other at positions corresponding to the holding grooves 7 and open to one end side and extend to the vicinity of the wall 8 at the other end. A cutout engaging portion 2A is formed on a side portion of the housing 2, and a locking step portion 2B is formed on a lower surface.

In the present embodiment, the lid member 3 is made of an insulating material in a substantially plate shape, and has a projection engaging portion 3A which fits into the notch engaging portion 2A of the housing 2 on the lower surface on both sides. ing. Further, on the lower surface of the lid member 3, at a position corresponding to the receiving groove 6 of the housing 2, the pressing protrusion 9 having an arcuate concave surface for applying the cable C of the receiving groove 6 is provided. The pressing projection 9 is not always required to be provided in a range over the entire length of the accommodation groove 6, and is provided in a range of a blade-like portion forming a connection portion when the press contact terminal 5 is accommodated in the accommodation groove 6. That is enough.

In the present embodiment, the holder 4 is formed by bending a metal plate into a substantially inverted U-shape, and has a flat upper portion 4A, a side portion 4B extending perpendicular to the upper portion 4A, and the side portion 4B. Part 4
B has a lower end 4C bent inward.
The distance between the inner surfaces of the upper part 4A and the lower part 4C is determined by placing a press-contact terminal 5 and a cable C described later in the housing groove 6 of the housing 2, arranging the lid member 3 on the housing 2, and After connecting the cable C to the press-connecting terminal 5 by press-connecting, these are held by the holder 4 as shown in FIG.
This press-connecting state can be maintained.

The press contact terminal 5 shown in FIG. 2 and FIG. 4 is made of a metal material in a substantially plate shape, and is provided with a blade-like portion 10 forming a connection portion for press contact connection with a cable at the center of the upper edge.
One end has a solder connection portion 11 for solder connection with a circuit board portion of a circuit board (not shown). The blade 1
0 is thinner upward and has a point in the present embodiment, but the present invention is not limited to this.
The entire blade portion may be thin, and it is sufficient that the upper edge be able to penetrate the cable jacket. Before and after the blade-shaped portion 10, as a preferred form, the regulating step portion 1
2 are formed. The regulating step 12 is provided with the blade 1
0 is bitten into the cable by an appropriate amount at the time of press-connecting, so that it does not bite further.
2 abuts against the cable jacket surface to receive resistance.

Guide pieces 13 and 14 are provided before and after the central area where the blade 10 and the regulating step 12 are formed. One guide piece 13 is shown in FIGS.
As can be seen from the drawings, a slope 13A is formed, which is shifted to one side in the thickness direction of the terminal 5, and the other guide piece 1 is formed.
4 is shifted to the opposite side due to the formation of the slope 14A. The guide pieces 13 and 14 form a space for accommodating cables on opposite sides in the thickness direction at the slopes 13A and 14A. FIG. 5 shows the connection of the terminal 5 as described above to the housing 22.
FIG. 3 is an enlarged plan view showing a state in which the guide pieces 13 and 1 are inserted into the accommodation groove 6 from the lateral direction.
It can be seen that the cable C is disposed in the space formed between the slopes 13A and 14A of FIG. In FIG. 5, the cable C is indicated by a two-dot chain line, and reference numeral C1 is a core wire.

In the connector according to this embodiment, the cables are press-connected in the following manner.

First, as shown in FIG. 5, the cable C is placed on the press contact terminal 5 housed in the housing groove 6 of the housing 2.

Next, the cover member 3 is arranged on the housing 2, and the cover member 3 is pressed in the direction of the housing 2 so that the pressing projection 9 of the cover member 3 is located in the accommodation groove 6. . Then, the cable C is connected to the guide pieces 13 and 1 of the insulation displacement terminal 5.
The guide groove 4 is guided by the inclined surfaces 13A and 14A and is pushed into the housing groove 6 so as to be inclined toward the inner surfaces of the housing groove 6 opposite to each other. Therefore, the cable C is connected to both guide pieces 13, 1
Between the four portions, they are tensioned in the longitudinal direction and positioned so as to come on the blade-shaped portion 10. When the pressing of the lid member 3 is further continued, as shown in FIGS. 6A and 6B, the cable C is pushed from the position indicated by the solid line to the position indicated by the two-dot chain line on the blade portion 10, and The blade-shaped part 10 which is a connection part of the above-mentioned bite bites into the sheath of the cable C and comes into contact with the core wire C1. At this point, the regulating step 12 comes into contact with the outer surface of the cable C, so that the blade-shaped section 12 is prevented from further biting.

FIG. 6 (A) shows a cross section at the center of the blade-shaped portion 10, and FIG. 6 (B) shows a cross section at a position deviated from the center. The dotted line shows the shape when the cable is not deformed, but the cross section is actually deformed at that position.

Finally, the holder 4 is mounted as shown in FIG. 1, and the housing 2 and the lid member 3 are held in the above-mentioned press-connection state.

The present invention is not limited to the illustrated embodiment,
Deformable.

For example, in the example of FIG. 1, the holder is closed and the lid member is held on the housing, but this can be done without using the holder. As shown in FIG.
A locking projection 15 is provided on the press contact terminal 5 fixed to the cover member 3.
The cover member 3 can be held by the housing 2 via the press contact terminal 5.

[0028]

According to the present invention , the cable can be
Is held by the guide pieces at both sides of the crimping part in the longitudinal direction.
Since the pinch is held between the inner wall of the container groove and
It is maintained, and in this state the blades bite into the cable
Pressure welding is performed. At this time, the guide piece should be
Indeed, the cable is pressed against the inner wall of the receiving groove. Thus, on
Due to the cable holding by the guide piece,
Escape to the side of the cable, or
Displacement is prevented, and the blade-shaped portion reliably reaches the core wire. Also, pressure
The contact receives resistance in proportion to the bite into the cable
Because of the displacement, the amount of biting of the press-contact portion into the cable is maintained at a predetermined value. At this point, press-connecting is performed more stably, and an unforeseen situation such as disconnection of the core wire is avoided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a connector according to an embodiment of the present invention.

FIG. 2 is a perspective view of the connector of FIG. 1 when respective members are separated.

3 (A) is a plan view of the housing, FIG. 3 (B) is a cross-sectional view of a housing groove in a state where the housing and the lid member are separated, and FIG. It is a side view in a state where a housing and a lid member are separated.

FIG. 4 shows a press contact terminal of the connector of FIG. 2, and FIG.
4B is a front view, FIG. 4B is a plan view, FIG. 4C is a left side view, FIG. 4D is a right side view, and FIG. 4E is a cross-sectional view taken along line EE in FIG. It is.

FIG. 5 is an enlarged plan view showing a state in which the press contact terminal of FIG. 4 is in a housing groove of a housing.

6A and 6B are cross-sectional views illustrating a positional relationship between a lid member, a cable, and a blade-shaped portion. FIG.
(B) deviates from the center position.

FIG. 7 is a cross-sectional view showing another embodiment of the present invention.

FIG. 8 is a sectional view of a conventional connector.

[Explanation of symbols]

 2 housing 3 lid member 5 press-contact terminal 6 receiving groove 10 blade-shaped portion 12 regulating step portion 13, 14 guide piece C cable C1 core wire

Claims (3)

(57) [Claims] 1. A connection portion of the pressure contact terminal forms the blade-like portion, the electrical connector the blade-like portion is pressed against connected to the core wire bites into the cable sheath, the press contact terminal and cable to one surface of the housing Of the receiving groove and the opposite side
Holding grooves are respectively formed at corresponding positions, and the press contact terminals are
Opposed inner wall surface of the receiving groove causes the deflection of the cable in the width direction by the taper side mutually located on the opposite side at the longitudinal direction at two positions in the width direction of the receiving groove of the receiving groove in the housing groove
A guide piece nipping the cable between, between the two guide pieces at the longitudinal direction and have a a blade-like portion where the cable is provided in the widthwise center position of the receiving groove is placed With
In addition, it has a fixed arm portion that fits into the holding groove.
A press-connecting electrical connector, wherein a cover member for pressing a cable disposed on the blade-shaped portion in the accommodation groove can be attached to the housing. 2. The press-connecting electrical connector according to claim 1, wherein the press-connecting terminal has a regulating step formed near the blade-shaped portion for restricting the amount of bite of the blade-shaped portion into the cable. (3) Lid member is arc shaped to press cable
A pressing projection having a concave surface is provided.
2. The electrical connector according to 1.