JP2012221865A - Electric connector - Google Patents

Abstract

[PROBLEMS] To improve the electrical capacity balance with a conductive contact while improving the efficiency of solder joining work in a so-called hybrid (different type of cable) cable having a different outer shape with a simple configuration. .
A large-diameter thick cable SC1 of cables SC having different outer diameters is arranged between a pair of adjacent conductive contacts 12, 13, and the thick cable SC1 is connected to a pair of conductive contacts 12. 13, the thick cable SC1 is stably held to make the soldering work easy and accurate, and the thin and low-capacity conductive contacts 12, 13 are particularly suitable. It is configured to maintain a good electric capacity balance between the two.
[Selection] Figure 2

Description

  The present invention relates to an electrical connector configured to connect a plurality of cables having different outer diameters.

  Generally, in various electric devices, a plurality of cables arranged in a multipolar shape are connected to a circuit board via an electric connector. In the insulating housing provided in the electrical connector, conductive contacts are arranged in a multipolar shape along the longitudinal direction of the insulating housing, and the end portion of each cable is connected to each of the conductive contacts. Are joined by a solder material in a state of contact. In this way, as cables connected to the electrical connectors, different diameter cables having different outer diameters, for example, so-called hybrid (heterogeneous wire) cables in which large diameter thick wire cables and small diameter thin wire cables are mixed are used. There is. These large-diameter thick wire cables and small-diameter thin wire cables are also used by being solder-bonded to the conductive contacts as described above.

  On the other hand, in recent years, electrical connectors have been downsized, and accordingly, conductive contacts having thinner thicknesses are being adopted. For such thin conductive contacts, work efficiency tends to decrease due to the difficulty of cable positioning in cable soldering operations. In particular, the above-described hybrid (different type of cable) cable is employed. In this case, it takes time to join the large-diameter thick cable. In addition, the electrical capacity balance between the thick cable and the thin, low-capacity conductive contact may not be good, and the height from the surface of the insulating housing on which the cable is placed has a large diameter. Since there will be variations between the thick cable and the small-diameter thin cable, it becomes difficult to place the elongated solder material over the entire cable, and so-called batch soldering may be difficult. is there.

JP 2009-289719 A JP 2000-331731 A Table 2008/001453

  Accordingly, the present invention provides an electrical connector that facilitates the soldering operation of a hybrid (heterogeneous wire) cable with a simple configuration and can improve the electrical capacity balance with the conductive contact. The purpose is to provide.

  In order to achieve the above object, in the electrical connector according to the present invention, the conductive contacts are arranged so as to form a multipolar shape in the insulating housing, and the conductive wires are thick wires having different outer diameters. In the electrical connector configured to connect the cable and the thin wire cable, the small diameter thin wire cable is connected in a state of being directly mounted on the surface of the conductive contact, and the large diameter thick wire cable is And a configuration in which a part of the outer peripheral surface of the thick wire cable is disposed so as to contact both of the pair of conductive contacts, between the pair of conductive contacts adjacent to each other in the direction of the multipolar arrangement. It has been adopted.

  According to the electrical connector having such a configuration, one thick wire cable is stably held in a state of being in electrical contact at a portion between the pair of conductive contacts, and the thick wire cable is joined. In addition to being easily and accurately performed, the electrical capacity balance between the thin and low-capacity conductive contacts is improved.

  Further, in the present invention, a part of the outer peripheral surface of the thick cable is configured to be accommodated in a cable mounting groove recessed in the insulating housing, and the cable mounting The groove is formed to have a groove depth that makes the height position of the thick cable accommodated in the cable placement groove substantially the same as the height position of the thin wire cable placed on the conductive contact. It is desirable.

  According to the electrical connector having such a configuration, the large-diameter thick wire cable is stably positioned by the cable placement groove provided in the insulating housing, and the large-diameter thick wire cable and the small-diameter cable are maintained. The long solder material is placed in a stable contact state over the entire cable including both of the thin wire cables, and collective soldering with the solder material is easily and reliably performed.

  Furthermore, in the present invention, it is desirable that the large-diameter cable is disposed at at least one of both end portions in the multipolar arrangement direction.

  According to the electrical connector having such a configuration, the cables at both end portions that are likely to swing left and right are stably maintained by the relatively large rigidity that the large-diameter cable has, and damage such as disconnection is avoided. .

  Furthermore, in the present invention, it is desirable that the thick cable is disposed at a portion other than both ends in the direction of the multipolar array.

  According to the electrical connector having such a configuration, the tensile strength of the entire cable is improved relatively uniformly in the multipolar arrangement direction, and the strength is improved.

  As described above, the electrical connector according to the present invention includes a large-diameter thick wire cable among cables having outer diameters different in size, and is arranged between a pair of adjacent conductive contacts so that the thick-wire cable is connected to a pair of conductive wires. By arranging to contact both contacts, the thick wire cable can be held stably and soldering work can be made easily and accurately, and the electrical capacity balance with the conductive contact is maintained well. Therefore, with a simple configuration, it is possible to improve the electrical capacity balance while improving the efficiency of solder joining work in so-called hybrid (different type of cable) cables having different external shapes, The reliability of the connector can be increased at a low cost.

In the electrical connector for hybrid coaxial cables concerning one embodiment of the present invention, it is an appearance perspective explanatory view showing the state before connecting a hybrid cable (heterogeneous line). FIG. 2 is an external perspective explanatory view showing a state where a hybrid cable (dissimilar wire) is connected in the electrical connector for the hybrid coaxial cable shown in FIG. 1. It is a plane explanatory view of the electric connector for hybrid coaxial cables shown in FIG. FIG. 4 is a cross-sectional explanatory diagram showing an enlarged cross section along line IV-IV in FIG. 3. FIG. 3 is an explanatory plan view showing a connection state between the electrical connector for the hybrid coaxial cable shown in FIG. 2 and a hybrid cable (different type of wire). It is longitudinal cross-sectional explanatory drawing which expanded and represented the cross section along the VI-VI line in FIG. FIG. 7 is an explanatory cross-sectional view illustrating an enlarged cross section taken along line VII-VII in FIG. 5. FIG. 6 is a cross sectional explanatory view showing an enlarged cross section along the line VIII-VIII in FIG. 5. FIG. 6 is a cross-sectional explanatory view showing an enlarged cross section along the line IX-IX in FIG. 5. FIG. 7 is a cross-sectional explanatory view corresponding to FIG. 6 illustrating a state in the middle of a wire connection operation in which a heater chip is brought into contact and the cables are collectively soldered.

  Hereinafter, an embodiment in which the present invention is applied to an electrical connector for connecting a plurality of hybrid (dissimilar wire) coaxial cables to the printed wiring board side will be described in detail with reference to the drawings.

  The electrical connector according to an embodiment of the present invention shown in FIGS. 1 to 10 includes a plug connector 1 to which a terminal portion of a hybrid (heterogeneous line) coaxial cable SC is connected, and is not shown. This is a vertical fitting type configuration in which the receptacle connector mounted on the printed wiring board is fitted so as to be inserted downward from the upper side. Hereinafter, the direction in which the plug connector 1 is inserted into the receptacle connector is referred to as “downward”, and the direction in which the plug connector 1 is pulled out is referred to as “upward”.

  The plug connector 1 according to the present invention has an insulating housing 11 made of a predetermined insulating member formed in an elongated shape. Hereinafter, the longitudinal direction of the insulating housing 11 is referred to as “connector longitudinal direction”, and the direction perpendicular to both the connector longitudinal direction and the above-described up-down direction is referred to as “front-rear direction”.

  In the insulating housing 11 described above, a plurality of conductive contacts 12 and 13 having different shapes are arranged in a multipolar shape alternately at an appropriate pitch interval along the connector longitudinal direction. When the plug connector 1 is inserted into the receptacle connector (not shown) mounted on the printed wiring board as described above and the fitting operation between the two connectors is completed, the plug connector 1 is connected to the plug connector 1. The contact portions of the provided conductive contacts 12 and 13 are configured to come into electrical contact by contacting the contact portions of the conductive contacts on the receptacle connector side in a pressure contact state.

  On the outer surface of the insulating housing 11, a conductive shell 14 made of a metal thin plate member is attached to a connecting portion of a hybrid coaxial cable (signal transmission medium) SC described later. The conductive shell 14 extends in a long shape along the connector longitudinal direction at one end edge portion of the insulating housing 11, and is in an arrangement relationship forming a part of the ground circuit.

  On the other hand, the hybrid coaxial cable (signal transmission medium) SC used in the present embodiment is composed of a mixed cable of different wires having different large and small outer diameters, and includes a large-diameter thick coaxial cable SC1 and a small-diameter coaxial cable SC1. A plurality of thin coaxial cables SC2 are arranged in parallel. Among them, the small-diameter thin coaxial cable SC2 is arranged in a large number near the center in the connector longitudinal direction, and two small coaxial cables SC2, SC2,. Large-diameter thick coaxial cables SC1 and SC1 each having a pair are arranged.

  The terminal portions of each of the large-diameter thick coaxial cable SC1 and the small-diameter thin coaxial cable SC2 are connected to one end side edge portion in the front-rear direction with respect to the plug connector 1. Hereinafter, the end portion on the long side to which the terminal portion of the hybrid coaxial cable SC is connected is referred to as “rear end edge portion”, and the front end portion on the opposite side is referred to as “front end edge”. Part ".

  A plurality of thick coaxial cables SC1 and thin coaxial cables SC2 constituting the hybrid coaxial cable (signal transmission medium) SC are arranged so as to correspond to the positions of the conductive contacts 12 and 13 in the plug connector 1 described above. And are arranged in parallel so as to form a multipolar shape along the longitudinal direction of the connector. The terminal portions of the thick coaxial cable SC1 and the thin coaxial cable SC2 are stripped of the covering material, so that the cable center conductors (signal lines) SC1a and SC2a and the cable outer conductors (shield lines) SC1b and SC2b are provided. Exposed. Then, the cable center conductors (signal lines) SC1a and SC2a arranged along the center axis of the hybrid coaxial cable SC are collectively soldered to the conductive contacts 12 and 13 of the plug connector 1 to form a receptacle. A signal transmission circuit is formed by being connected to each conductive contact (not shown) on the connector side.

  Here, the cable center conductor (signal line) SC2a of the thin coaxial cable SC2 constituting the above-described hybrid coaxial cable (signal transmission medium) SC is the conductive contact 12 described above, particularly as shown in FIG. , 13 are mounted directly on the surface, and are joined by a solder material in the state of being mounted directly. On the other hand, the cable center conductor (signal line) SC1a of the thick coaxial cable SC1 is disposed on the insulating housing 11 at a portion between the pair of conductive contacts 12 and 13 adjacent to each other in the direction of the multipolar arrangement. .

  The cable center conductor (signal line) SC <b> 1 a of the thick coaxial cable SC <b> 1 is accommodated in the cable placement groove 11 a provided in the insulating housing 11. That is, two cable mounting grooves 11a and 11a are respectively provided in the surface of the insulating housing 11 and at both end portions in the connector longitudinal direction. Each of the cable mounting grooves 11a is provided so as to form a space having a substantially trapezoidal cross section in a portion between a pair of adjacent conductive contacts 12 and 13, and each of the cable mounting grooves 11a. Is accommodated in such a manner that a cable center conductor (signal line) SC1a constituting a large-diameter thick coaxial cable SC1 is dropped.

  In the cable center conductor SC1a accommodated in the cable placement groove 11a, the lower half side portion of the cable center conductor SC1a abuts against inclined wall surfaces constituting both side surfaces of the cable placement groove 11a. It is supported by. Further, a part of the outer peripheral surface in the upper half side portion of the cable center conductor SC1a exposed upward from the cable placement groove 11a, more specifically, both side portions in the diametrical direction are a pair of adjacent ones described above. The arrangement is such that the conductive contacts 12 and 13 are in contact with each other.

  In this way, the cable center conductor (signal line) SC1a of the large-diameter thick coaxial cable SC1 is housed in the cable placement groove 11a provided in the insulating housing 11. The height position from the surface of the insulating housing 11 is reduced by the groove depth of the placement groove 11a. In the present embodiment, the height of the top portion of the cable center conductor SC1a of the thick coaxial cable SC1 is set to the above-described conductive contact 12, 13 is adjusted to a reduced state so as to be substantially the same as the height position of the top portion of the cable center conductor SC2a of the thin coaxial cable SC2 placed on the surface of 13. Thereby, the height position of the upper end surface of the cable is made substantially uniform over the entire hybrid coaxial cable SC, and the long solder material is placed in contact with the entire cable of the hybrid coaxial cable SC. Thus, so-called collective soldering is possible.

  On the other hand, cable outer conductors (shield wires) SC1b and SC2b arranged so as to surround the outer peripheral side with respect to the cable center conductors (signal lines) SC1a and SC2a of the hybrid coaxial cable SC are long and arranged in a pair of upper and lower sides. It is arranged so as to be sandwiched between the ground bars SCc and SCd made of plate-like metal members, and is connected and held by batch soldering. These ground bars SCc and SCd are joined in advance before the hybrid coaxial cable SC is attached to the plug connector 1 (see FIG. 1), and after being attached to the plug connector 1, they are attached to the conductive shell 14 described above. The arrangement is such that electrical circuit connection is made by contact.

  According to this embodiment having such a configuration, the cable center conductor (signal line) SC1a constituting one thick coaxial cable SC1 is electrically connected between the pair of conductive contacts 12 and 13. By being stably held in contact, the joining operation of the thick coaxial cable SC1 to the cable center conductor SC1a is easily and accurately performed, and by being in contact with both the conductive contacts 12 and 13, The electric capacity balance between the conductive contacts 12 and 13 which are made thin and have a low capacity is improved.

  In particular, in the present embodiment, since the cable center conductor (signal line) SC1a of the thick coaxial cable SC is accommodated and held in the cable placement groove 11a provided in the insulating housing 11, the thick coaxial cable SC1. Is maintained in a stably positioned state.

  In addition, the cable placement groove so that the height position of the cable center conductor SC1a of the thick coaxial cable SC1 is substantially the same as the height position of the cable center conductor SC2a of the thin coaxial cable SC2 placed on the conductive contact 12. Since the groove depth of 11a is adjusted, it becomes possible to place the long solder material stably in contact with the entire thick coaxial cable SC1 and thin coaxial cable SC2. Then, for example, the heater chip HT as shown in FIG. 10 is arranged so as to span the entire cable of the above-described hybrid coaxial cable (signal transmission medium) SC, and the heater chip HT is elongated by the heating action from the heater chip HT. If the solder material is melted, so-called batch soldering is easily and reliably performed. In this case, it is not necessary to use a heater chip having a special shape (stepped shape), and a heater chip having a general tip flat shape can be used. It is also possible to make a batch solder connection using a hybrid coaxial cable SC in which the solder material is melted in the cable center conductors SC1a and SC2a without using a long solder material.

  Further, in the present embodiment, since the large-diameter thick coaxial cable SC1 is disposed at both end portions in the multipolar arrangement direction, the large-diameter coaxial cable SC1 has a relatively large rigidity, so that The stability of the cables at both end portions that are likely to swing is improved, and damage such as disconnection is avoided. Note that the thick coaxial cable SC1 at this time may be arranged at at least one of both end portions in the multipolar arrangement direction. For example, the thick coaxial cable SC1 is arranged at one end in the multipolar arrangement direction. However, substantially the same operation and effect can be obtained.

  Furthermore, as described above, in addition to arranging the large-diameter thick coaxial cable SC1 at both end portions in the multipolar arrangement direction, it can be arranged at portions other than the both end portions near the center in the multipolar arrangement direction. For example, the tensile strength of the entire cable is improved relatively uniformly in the multipolar arrangement direction, and the strength is improved.

  Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

  For example, in the above-described embodiment, two large-diameter thick wire cables are arranged on both sides in the longitudinal direction, but the position and number of the thick wire cables can be selected as appropriate and are different. The present invention can be similarly applied when three or more types of cables having outer diameters are arranged.

  In the above-described embodiment, the cable placement groove is formed corresponding to the cable center conductor. However, when the cable outer conductor has a configuration in contact with the conductive contact, the cable corresponding to the cable outer conductor is used. It is also possible to form a mounting groove.

  Furthermore, the present invention is not limited to the electrical connector for the hybrid coaxial cable as in the above-described embodiment, but includes an electrical connector of a type in which a plurality of hybrid coaxial cables and insulating cables are mixed, a flexible wiring board, and the like. The present invention can be similarly applied to an electrical connector to be connected or an electrical connector using a cable having a structure other than the coaxial structure.

  Furthermore, in the above-described embodiment, a configuration in which conductive contacts having different shapes are alternately arranged is employed, but the present invention is also applied to an electrical connector in which conductive contacts having the same shape are arranged in a multipolar manner. The invention can be similarly applied.

  As described above, the present invention can be widely applied to various electrical connectors used in various electrical devices.

DESCRIPTION OF SYMBOLS 1 Plug connector 11 Insulation housing 11a Cable mounting groove 12, 13 Conductive contact 14 Conductive shell SC Hybrid coaxial cable SC1 Large diameter thick coaxial cable SC2 Small diameter thin coaxial cable SC1a, SC2a Cable center conductor (signal line)
SC1b, SC2b Cable outer conductor (shielded wire)
SCc, SCd Ground bar HT Heater chip

Claims (4)

Conductive contacts are arranged so as to form a multipolar shape in the insulating housing, and a thick wire cable and a thin wire cable having different outer diameters are connected to the conductive contacts. In the connector,
The small-diameter thin wire cable is connected in a state of being directly placed on the surface of the conductive contact,
The large-diameter thick cable is disposed between a pair of adjacent conductive contacts in the direction of the multipolar arrangement, and a part of the outer peripheral surface of the thick cable contacts both the pair of conductive contacts. An electrical connector characterized by being arranged as described above. A part of the outer peripheral surface of the thick wire cable is configured to be housed in a cable mounting groove recessed in the insulating housing,
A groove depth at which the cable placement groove makes the height position of the thick wire cable accommodated in the cable placement groove substantially the same as the height position of the thin wire cable placed on the conductive contact. The electrical connector according to claim 1, wherein the electrical connector is formed as described above.   The electrical connector according to claim 1, wherein the thick cable is disposed at at least one of both end portions in the direction of the multipolar array.   The electrical connector according to claim 3, wherein the thick wire cable is disposed at a portion other than both end portions in the direction of the multipolar array.

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