JP2001076798A - Connector cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationalize a manufacturing process of a connector cable and to reduce a defect rate in a molding process. SOLUTION: This connector cable comprises a parallel-axis wire 11, a positive contact 21 and an earth contact 23 constituting a positive electrode and an earth electrode, respectively, a plug body member 25 holding them, and a mold member 32 for over-molding the connection part of the electrodes to the parallel- axis wire. In this case, the connector cable 1 is composed by disposing pressed-in parts 21a, 23a of the two plug contacts at nearly the same distance from the center axis Y of the plug body member 25 in the horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector cable, and more particularly, to a connector cable for a parallel shaft electric wire used as a power supply cord, an AC adapter cable, a battery cable, and the like in home electric appliances and information equipment.

[0002]

2. Description of the Related Art A connector cable for a parallel-axis electric wire as described above has been conventionally provided with various kinds of connectors, and extremely various kinds of products are actually manufactured and sold. Some of these connector cables include the positive and negative poles conventionally used for power supply.
In addition to a connector cable consisting of two terminals (ground pole), in recent years, a connector cable consisting of three terminals incorporating future functional expansion has been used. For example, in an AC adapter cable that detachably connects an information device and an AC adapter that converts AC100 [V], which is a household power supply line, to an operating voltage of the information device, an abnormality in a power supply system including the AC adapter is detected, A connector cable having a third pole in addition to the above two poles is being used as a spare terminal for performing tuning control or the like with a peripheral device.

FIG. 8 shows an example of such a connector cable having the third pole. In this example, a plug connector portion of an AC adapter cable which is detachably connected to an information equipment main body and supplies power is shown. ing. In this connector cable 6, a plus pole 71a and a spare pole 72a are formed symmetrically above a fitting portion in front of the plug connector, and a ground pole 73a is formed from the left and right side surfaces to the lower surface of the fitting portion. Behind the plug connector, a parallel shaft electric wire 61 connected to the positive pole 71a and the earth pole 73a is provided extending rearward, and is joined to the plug main body member 75 holding the electrode and the parallel shaft electric wire 61. The parts are integrally molded by a mold member to form a grippable connector body 82.

[0004]

In the connector cable 6, the positive terminal 71a and the spare terminal 72a are symmetrically disposed on the upper surface of the fitting portion of the plug connector. Terminal 73a is disposed on the lower surface side of the plug connector. Also, while the basic design of each component constituting the plug connector is based on the assumption that all three poles are used, the terminals actually connected and used by the cable are the positive pole and the ground pole. It has two poles. For these reasons, the following problems have occurred.

FIGS. 9 and 10 show the structure and manufacturing process of a conventional connector cable 6. FIGS. 9 (a) to 9 (e) show a pre-processing step of a parallel shaft electric wire 61, and FIGS. (F) shows the component part (a) of the plug connector and the assembling steps (b) to (f). The connector cable 6 includes a parallel-axis electric wire 61 having a pair of conductors, a positive contact 71 forming a positive pole, a dummy contact 72 forming a spare pole, a ground contact 73 forming a ground pole, and a plug for holding these contacts. It is composed of a main body member 75 and mold members 81 and 82 for forming a grip portion by molding a connection portion between each of the contacts and the parallel-axis electric wire, and is manufactured by the steps shown in these figures. Note that the dummy contact 72 uses a common component with the positive contact 71.

Here, connection positions 71c and 73c between the plus contact 71 and the ground contact 73 to which the connection ends 62a and 62b of the parallel shaft electric wire 61 are connected in the soldering step (FIG. 10D) are shown in FIG. As shown in the top view, the left and right sides of the body portion 82 of the plug connector and the central axis (connector connection axis) Y of the parallel-axis electric wire 61 to be taken out are not the same distance on the left and right. XII (a)
12 (a), and XII (b) -XII (b).
As shown in (b), the arrangement is also twisted toward the cable outlet in the vertical direction.

For this reason, the end lengths of the two electric wires 61a and 61b constituting the parallel-axis electric wire cannot be the same, and the length of the two electric wires is reduced in the pre-processing step of the parallel-axis electric wire 61. A step of “step cutting” for adjusting to a different length was required (FIG. 9C). Even if such a step cut is performed, resin molding is performed in a twisted arrangement of the parallel-axis electric wires, so that the floating of the plug body member 75 and the electric wires 61 due to the torsional reaction force of the parallel-axis electric wires in the molding process. It was easy for rashes to occur. For this reason, it is necessary to divide the molding process into two stages and perform an "intermediate pressing process" (FIG. 10 (e)) in which only the vicinity of the electric wire connection portion is overmolded. Therefore, there is a problem that the defect rate in the molding process is high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made to reduce the number of steps by eliminating the step cutting and the intermediate pressing steps, and to reduce the defective rate in the molding step, thereby reducing the cost. It is an object of the present invention to provide a connector cable which can be manufactured by using a connector cable.

[0009]

In order to achieve the above object, a connector cable according to the present invention comprises a pair of conductors extending in parallel with each other and an insulator covering the outer periphery of the conductor, and is integrally formed. A parallel shaft electric wire forming a cord, two press-fit terminals having a press-fit portion at a front portion and a crimp-fixed terminal of the parallel shaft wire at a rear portion, and a press-fit terminal at a rear portion having a contact portion at a front portion. Two plug contacts having press-fitted portions to be press-fit connected, a plug body member extending and holding the plug contacts back and forth, and a plug body near the connection portion in a state where the press-fit terminals and the plug contacts are press-fit connected And a mold member for covering the parallel wire. One of the two plug contacts is disposed on the upper surface side of the plug body member, and the other plug contact is provided on the lower surface side of the plug body member. Contacts are arranged, the press-fitting portion of the two plug contacts constitute a connector cable and disposed substantially the same distance in the lateral direction from the center of the plug body member (e.g., in the Y-axis in the embodiment).

According to the above configuration, the two press-fitted portions of the plug contact to which the two press-fitting terminals crimped to the ends of the parallel-axis electric wires are connected at substantially the same distance in the left-right direction from the center of the plug body member. Will be arranged. Therefore,
Performs a "step cut" required due to the fact that the connection portion of the two plug contacts to which the two parallel-axis electric wires are connected is present at unequal distances from the center of the plug body member. No need.

The press-fitting terminals are offset in the axis of the wire crimped and fixed with respect to the center axis of the press-fitting portion. The press-fitting terminals are turned upside down and press-fitted to the two plug contacts, respectively. It is preferable that the later-described parallel shaft electric wires be configured so that the axial heights thereof are substantially the same.

[0012] According to such a configuration, the two electric wires of the parallel-shaft electric wire have substantially the same axial height after the press-fit terminals crimped to the respective terminals are press-fitted to the two plug contacts, respectively. They are arranged to be the same. For this reason, the rotation of the plug main body member and the unevenness of the electric wires in the molding process due to the state in which the two parallel-axis electric wires are twisted from the connection portion toward the mold outlet do not occur. The "intermediate pressing step" can be eliminated, and the defect rate of the molding step can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A connector cable according to the present invention will be described below with reference to the drawings. FIG. 1 shows the appearance of a connector cable according to the present invention. In this connector cable 1, a plus pole 21a and a spare pole 22a are formed symmetrically above a fitting portion in front of a plug connector. Earth pole 23 from the left and right sides to the bottom
a is formed. At the rear of the plug connector, a parallel-axis electric wire 11 connected to the positive electrode and the ground electrode is provided to extend rearward, and a joint portion between the plug main body member 25 holding the electrode and the parallel-axis electric wire 11 is provided. The connector body 32 is integrally molded by a molding member and can be gripped. Note that this connector cable 1
Is a connector cable having the same outer shape and the same function as the above-described connector cable 6 in appearance.

FIGS. 2 and 3 show the connector cable 1 shown in FIG.
2 (a) to 2 (d) show a cable pre-processing step, and FIGS. 3 (a) to 3 (d) show a plug connector component (a) and an assembling step (b). ) To (d). The connector cable 1 is a parallel-axis electric wire 1 having a pair of conductors.
1. Press-fit terminal 1 crimped and fixed to the end of parallel electric wire 11
3, a plus contact 21 forming a plus pole, a dummy contact 22 forming a spare pole, a ground contact 23 forming a ground electrode, a plug body member 25 holding these contacts, and a parallel shaft electric wire with each of the above contacts. Is formed by molding a press-fit connection portion to ensure insulation between the electrodes, and a mold member 32 forming a grip portion.

The parallel-axis electric wire 11 is composed of a pair of conductors (twisted wires) extending parallel to each other and an insulator covering the outer periphery of the conductor, and is integrally formed to form a single cord. ing. This parallel-axis electric wire 11 is first cut into a prescribed length in the pretreatment step of the cable shown in FIG.
(a), the end is cut to a predetermined length and separated into two pieces 11a and 11b (b), and the coating of the tip is peeled off to remove the conductors 12a and 12b.
After exposing b (c), the press-fit terminals 13, 13 are connected to the conductor 1
Press and fix to 2a, 12b upside down (d).

The positive contact 21, the dummy contact 22, and the ground contact 23 are formed by forming a thin metal sheet of an electric conductor such as brass or copper as shown in FIG. 3 (a), and applying a surface treatment such as plating as necessary. To complete parts. The ground contact 23 is different from the above-described ground contact 73 in that the connected portion 23c that is press-fit connected to the press-fit terminal 13 is provided.
Are formed at positions offset from each other in the left-right direction (positions that are equal to the connected portion 21c of the plus contact and left and right in the top view after the press-fitting of the contact). Further, the dummy contact 22 is formed in a shape having no connected portion of the press-fit terminal. The plug body member 25 is made of a polymer material such as PBT (polybutylene terephthalate) or ABS resin, mixed with glass fiber chopped strands as necessary, and molded into a required shape by injection molding.

In the press-fitting step shown in FIG. 3B, the plus contact 21, the dummy contact 22, and the ground contact 23 are respectively press-fitted into the mounting position of the plug main body member 25 and latched and held. A plus pole 21a and a spare pole 22a are formed on the upper surface of the tip, and a ground electrode 23a is formed from both left and right side surfaces to the lower surface. At the rear part of the plug main body member 25, the connected part 21c of the plus contact is exposed on the upper surface side, and the connected part 23c of the ground contact 23 is exposed on the lower surface side at the same distance from the center axis of the plug main body as viewed from the top and left and right. It is arranged.

In the assembly step shown in FIG. 3 (c), the connected portion 21c of the plus contact 21 and the connected portion 23c of the earth contact 23 are exposed above and below the plug body member 25.
c, the parallel shaft electric wire 11 in the cable pretreatment step (FIG. 2).
Press-fit terminal 1 crimped and fixed to conductor portions 12a and 12b of
3 and 13 are press-fitted respectively. By using the press-fit terminal connection as described above, the step of the preliminary soldering (FIG. 9 (e)) conventionally required on both the electric wire side and the terminal side can be reduced.

Here, the press-fitted portion 21c of the plus contact to which the plus-side press-fit terminal is connected, and the press-fitted portion 23c of the earth contact to which the ground-side press-fit terminal is connected,
As shown in the top view of FIG. 4, the plug connector body portion 32 and the central axis (connector connection axis) Y of the parallel-axis electric wire 11 to be taken out are arranged at the same left and right distance.
Also, the cross-sectional arrow views added as V (a) -V (a) and V (b) -V (b) in FIG. 4 are parallel axes as shown in FIGS. 5 (a) and 5 (b). The arrangement is such that the twist angle of the electric wire 11 with respect to the horizontal axis (X axis) is small.

For this reason, the end length of the parallel-axis electric wire can be the same for both the positive electrode and the ground electrode, and the "step cut" step (FIG. 9) conventionally required in the pre-processing step of the parallel-axis electric wire. (c)) can be abolished. In addition, since the torsional reaction force of the parallel-axis electric wire can be reduced, the floating of the plug main body member 25 and the bulging of the electric wire 11 in the mold are suppressed, and as a result, the “middle pressing process” conventionally required. (FIG. 10 (e)) can be abolished. In the above embodiment, the example in which the connected portion of the contact and the connection portion of the press-fit terminal form a so-called tab connector is described. However, a pin-type connector may be used.

FIG. 6 shows another embodiment of the connector cable according to the present invention. The connector cable 2 is the same as the embodiment shown in FIGS.
6 (a), the shape of the rear end portion of the plug body member 25 '(FIG. 6 (b)), and the press-fit terminal assembly direction (FIG. 6 (c)). )) Are different from each other, so that the parallel shaft electric wires at the press-fitting assembly position have substantially the same axial height.

In the press-fit terminals 13, 13, the connection center axis of the press-fit connection portion (the center of the thickness of the plus contact 21c or the ground contact 23c after the press-fit connection) and the center axis of the crimp-fixed electric wire are vertically oriented (each (Z-axis direction in the figure). In this embodiment, when the press-fit terminals 13, 13 are crimped and fixed to the parallel-axis electric wire 11, the two electric wires are disposed toward the center of the plug main body member 25 'in the vertical direction when press-fitted to the two contacts. And fix it by pressing.

The plug body member 25 'is connected to the press-fit terminal 13c of the electric wire 11 or the press-fit terminal when the press-fit terminals 13, 13 are press-fitted to the press-fit portion 21c of the plus contact and the press-fit portion 23c of the earth contact. The rear end is formed so that does not interfere with the main body member.

In the assembling step shown in FIG. 6 (c), the positively-contacted press-fit portion 21c and the ground-contact press-fit portion 23c, which are exposed above and below the plug body member 25 ', are fixed by crimping as described above. The press-fit terminals 13, 13 are press-fitted respectively. At this time, the positions of the wires of the positive pole and the ground pole are equidistant from the central axis of the connector when viewed from above, and the view taken in the direction of the arrow VII-VII in FIG. 6 is shown in FIG. As shown in the figure, the vertical height (Z-axis direction) of the plug main body member 25 'is also centered, and the axial height thereof is substantially the same.

Therefore, similarly to the above-described embodiment, the step of "step cut" conventionally required in the pre-processing step of the parallel shaft electric wire can be eliminated, and the torsional reaction force of the parallel shaft electric wire is generated. Therefore, the plug body member 25 ′ does not float in the mold or the electric wire 11 does not bulge, and the “middle pressing step” conventionally required can be eliminated.

In this embodiment, the press-fitting portion and the crimping portion are formed in the same direction, and an example is described in which the connecting shaft is offset by using the tab connector 13. Any press-fit terminal may be used as long as the press-fit terminal is offset from the axis of the wire of the crimping portion. For example, a pin-type connector having the same configuration, a tab terminal having the press-fitting portion and the crimping portion formed upside down, It may be.

[0027]

As described above, the present invention has two press-fit terminals, each having a press-fit portion at the front and a crimp-fixed terminal of a parallel-axis electric wire at the rear, and a contact at the front. Two plug contacts each having a press-fitted portion to which a press-fit terminal is press-fitted and connected thereto, and a plug body member holding the plug contact member, and one plug contact on the upper surface side of the plug body member and the other plug contact on the lower surface side of the plug body member In the connector cable to be overmolded, the press-fitted portions of the two plug contacts are disposed at substantially the same distance in the left-right direction from the center of the plug body member to form the connector cable. According to such a configuration, since the press-fitted portions of the plug contacts to which the parallel-axis electric wires are connected are disposed at the same distance from the center of the plug body member to the left and right, the end portions of these electric wires have the same length. be able to. Therefore, it is not necessary to adjust the length of the end portion due to the fact that the connection portion of the plug contact to which the parallel-axis electric wire is connected is located at an unequal distance from the center of the plug body member, that is, so-called “step cut”.

The press-fitting terminal is offset in the axis of the wire crimped and fixed with respect to the center axis of the press-fitting portion. The press-fitting terminals are turned upside down and press-fitted to the two plug contacts, respectively. The later-described parallel shaft electric wires are configured to have substantially the same axial height. According to such a configuration, the two parallel-axis electric wires are not twisted from the connection part toward the mold outlet. Therefore, in the molding process, the plug body member is not lifted or the wire is not flattened due to the torsion reaction force of the wire, so that
The so-called "intermediate pressing step" can be eliminated to simplify the molding step and reduce the defect rate in this step.

[Brief description of the drawings]

FIG. 1 is a top view showing the appearance of a connector cable according to the present invention.

FIG. 2 is an explanatory view showing a pretreatment process of a parallel-axis electric wire of the connector cable.

FIG. 3 is an explanatory diagram showing a main body configuration and an assembling process of the connector cable.

FIG. 4 is a top perspective view of the connector cable.

5 is an arrow view of the connector cable indicated by V (a) -V (a) and V (b) -V (b) in FIG.

FIG. 6 is an explanatory view showing a pre-processing step and an assembling step of another connector cable according to the present invention.

FIG. 7 is a view taken in the direction of arrows indicated by VII (a) -VII (a) and VII (b) -VII (b) in FIG.

FIG. 8 is a top view showing the appearance of a conventional connector cable.

FIG. 9 is an explanatory view showing a pre-processing step of a conventional parallel cable of a connector cable.

FIG. 10 is an explanatory view showing a main body configuration and an assembling process of a conventional connector cable.

FIG. 11 is a top perspective view of a conventional connector cable.

FIG. 12 is a view as indicated by arrows indicated by XII (a) -XII (a) and XII (b) -XII (b) in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Connector cable 11 Parallel-axis electric wire 13 Press-fit terminal (13a crimp part, 13c press-fit part) 21 Plus contact (21a contact part, 21
c Press-fit part) 23 Earth contact (23a contact part, 23)
c Press-fit part) 25 Plug body member 32 Mold member

Claims (2)

[Claims] 1. A parallel shaft electric wire integrally formed of a pair of conductors extending in parallel with each other and an insulator covering an outer periphery of the conductor to form one cord, and a front portion having a press-fit portion. Two press-fit terminals each having a terminal of the parallel-axis electric wire crimped and fixed at a rear portion, and two plug contacts having a press-fit portion at a front portion having a contact portion and a rear portion to which the press-fit terminal is press-fitted and connected. A plug body member that extends and holds the plug contact back and forth; a mold member that covers the plug body member and the parallel electric wire near a connection portion in a state where the press-fit terminal and the plug contact are press-fit connected. One of the two plug contacts is disposed on the upper surface side of the plug body member, and the two plug contacts are disposed on the lower surface side of the plug body member. The other transfected is disposed, the two press-fitted portion of the plug contacts, connector cable, characterized in that it is disposed substantially the same distance in the lateral direction from the center of the plug body member. 2. The press-fit terminal, wherein the axis of the crimp-fixed wire is offset with respect to the center axis of the press-fit portion, and the press-fit terminals are turned upside down to press-fit into the two plug contacts, respectively. 2. The connector cable according to claim 1, wherein the height of the parallel-axis electric wires after the connection and the press-fitting connection are substantially the same. 3.