JP2007095538A - Modular jack connector - Google Patents

Abstract

An object of the present invention is to prevent electrical contact failure by breaking a contact pin of a modular jack connector when a plug connector having a non-ISO standard abnormal contact plug connector is fitted to the modular jack connector.
A modular jack connector (12) includes a plurality of contact pins (15) in a fitting hole (2) of a mold case (1). Protrusions 3 are provided on the bottoms of the contact surfaces of the contact pins 15. When an abnormal plug connector having a contact pin height of a specified value or more is to be fitted into the fitting hole 2, insertion of the plug connector into the fitting hole 2 is stopped at the inlet by the protrusion 3. Thereby, destruction of the contact pin 15 of the modular jack connector 12 can be prevented.
[Selection] Figure 1

Description

  The present invention relates to a modular jack connector, and more particularly to a modular jack connector that prevents abnormal fitting with a mating plug connector.

  In general, a modular jack connector is mounted on a printed circuit board, and is engaged with a plug connector on the communication cable side so that pins of both connectors come into contact with each other for electrical connection. The height of the contact pin is defined by the ISO (the International Organization for Standardization) 8877 standard for the plug connector, and the modular jack connector has a structure that conforms to the size. In recent years, plug connectors on the communication cable side can be easily processed by general users using commercially available caulking tools.

  FIG. 7 is a cross-sectional view showing a state before the modular jack connector and the plug connector are fitted together according to the prior art, and FIG. 8 is a cross-sectional view showing the state where the modular jack connector and the plug connector shown in FIG. 9 is a sectional view showing a state of the modular jack connector after the plug connector is removed from the state of FIG. 7 to 9, 12 is a modular jack connector, 13 is a plug connector, 14 is a printed circuit board, 15 is a jack side contact pin, 16 is a plug side contact pin, and 19 is a core wire.

  The modular jack connector 12 according to the prior art is configured by providing a plurality of jack side contact pins 15 inside a fitting hole into which a plug connector 13 formed of a mold resin or the like is inserted. Used on board. A plurality of jack side contact pins 15 are arranged in a direction perpendicular to the paper surface, and each of the jack side contact pins 15 is formed in a key shape as shown in FIG. . The space between the front end portion of the fitting hole of the jack-side contact pin 15 and the fitting hole bottom portion has a prescribed dimension h0.

  The plug connector 13 is formed of a mold resin or the like into a shape that can be inserted into the fitting hole of the modular jack connector 12, and plugs are formed in the plug connector 13 so as to correspond to the jack-side contact pins 15 of the modular jack connector 12. A side contact pin 16 is provided, and a core wire 19 is connected to an upper portion of the plug side contact pin 16. The distance from the upper surface of the mold of the plug connector 13 to the lower end of the plug-side contact pin 16 is a distance 17 when the plug-side contact pin 16 and the core wire 19 are normally connected.

  When the modular jack connector 12 and the plug connector 13 configured as described above are fitted, a plurality of jack-side contact pins 15 are brought to the printed circuit board 14 side by a plurality of plug-side contact pins 16 as shown in FIG. It is deformed so as to be pressed, and electrical connection is made between both contact pins. When the plug connector 13 is removed from the fitting state shown in FIG. 8, the jack-side contact pin 15 of the modular jack connector 12 returns to its original position due to its spring property, and as shown in FIG. 9, the jack-side contact pin The dimension between the front end portion of the 15 fitting holes and the bottom of the fitting hole returns to the prescribed dimension h0.

  FIG. 10 is a cross-sectional view showing a state before the modular jack connector and the plug connector in an abnormal state are fitted together, and FIG. 11 shows a state in which the modular jack connector shown in FIG. 10 and the plug connector in an abnormal state are fitted together. FIG. 12 is a cross-sectional view showing the state of the modular jack connector after the plug connector in the abnormal state is removed from the state of FIG. 11, and the reference numerals in FIG. 12 are the same as those in FIGS. .

  The modular jack connector 12 shown in FIG. 10 is in a normal state and is the same as that described with reference to FIG. The plug connector 13 in the abnormal state shown in FIG. 10 has an incomplete connection between the core wire 19 and the contact pin 16 and has insufficient caulking when connecting the core wire 19 and the contact pin 16. is there. As a result, the distance from the upper surface of the mold of the plug connector 13 to the lower end of the plug-side contact pin 16 is a distance 21 greater than the distance 17 when the plug-side contact pin 16 and the core wire 19 are normally connected. Yes.

  When the abnormal plug connector 13 as described above is forcibly fitted to the modular jack connector 12, a plurality of jack-side contact pins 15 are connected to the printed circuit board 14 side by a plurality of plug-side contact pins 16 as shown in FIG. It is deformed so as to be pressed, and electrical connection is made between both contact pins. However, in this state, the jack-side contact pin 15 is strongly deformed, and when the plug connector 13 is removed from the fitting state shown in FIG. 11, the jack-side contact of the modular jack connector 12 is shown in FIG. The pin 15 is plastically deformed and cannot be returned to its original position due to its so-called sag due to its springiness, and the front end portion and the fitting hole inside the fitting hole of the jack-side contact pin 15 The dimension between the bottom part is h1 smaller than the prescribed dimension h0, and the spring property of the jack side contact pin 15 is lost. As a result, even if a normal plug connector 13 is subsequently fitted to the modular jack connector 12, a sufficient contact pressure cannot be obtained between the plug-side contact pin 16 and the jack-side contact pin 15, resulting in electrical Cause poor contact.

In addition, the prior art regarding the modular jack connector which prevented fitting the plug connector from which a pin number differs in a modular jack connector is described in patent document 1 etc., for example.
JP 2004-227892 A

  As described above, in the modular jack connector according to the prior art, when a plug connector whose contact height dimension of the plug connector is out of the standard is fitted to the modular jack connector, the contact pin of the modular jack connector is destroyed and the electric power is destroyed. There is a problem that a typical poor contact may occur.

  An object of the present invention is to provide a modular jack connector that can solve the above-described problems of the prior art and prevent the occurrence of poor contact.

  According to the present invention, the object is achieved by providing a projection on the plug connector insertion side of each of the plurality of contact pins in a modular jack connector having a plurality of contact pins and fitted with the plug connector. Is done.

  According to the present invention, since the insertion of the plug connector having a normal contact pin height can be stopped at the entrance of the modular jack connector, the contact pin of the modular jack connector can be prevented from being broken.

  Hereinafter, embodiments of a modular jack connector according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view illustrating the structure of a modular jack connector according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a state in which a plug connector in an abnormal state is to be fitted to the modular jack connector shown in FIG. FIG. 1 and 2, 1 is a mold case, 2 is a fitting hole, 3 is a protrusion, and the other symbols are the same as those in FIGS. 7 to 9.

  The modular jack connector 12 according to one embodiment of the present invention includes a plurality of jack-side contact pins 15 in the fitting hole 2 of the mold case 1 made of resin or the like having the fitting hole 2 into which the plug connector 13 is fitted. Is configured. This configuration is the same as that described with reference to FIG. The modular jack connector 12 is provided with a protrusion 3 so that the front portion of the fitting hole 2 does not have a contact pin height of the mating plug connector 13 exceeding a specified value. The protrusion 3 may have a quadrangular prism shape, a hemispherical shape as described later, or a quadrangular prism shape with a slope on the front surface, corresponding to each position of the jack-side contact pin 15, It is provided on the front side of each jack side contact pin 15, that is, on the fitting side into which the plug connector 13 is inserted, and is formed simultaneously with the mold case 1 when the mold case 1 is manufactured.

  When an abnormal plug connector 12 having a contact pin height of a predetermined value or more is fitted to a modular jack connector 13 provided with a protrusion 3 as shown in FIG. The insertion of the plug connector 13 into the fitting hole 2 is stopped at the entrance by the portion 3. As a result, it is possible to prevent contact failure due to destruction of the contact pin 15 of the modular jack connector 12 as described with reference to FIGS.

  3 and 4 are a front view and a sectional view for explaining a dimensional relationship including a protrusion of the modular jack connector according to the embodiment of the present invention.

  As shown in FIG. 3, the width dimension 5 of the protrusion 3 is set to 0.50 mm MAX in order to match the specified dimension of the contact pin 16 of the plug connector 13, and from the upper part 6 of the fitting hole 2 of the mold case 1. The interval 7 is 6.16 mmMIN. In the depth direction, as shown in FIG. 4, by providing an arbitrary distance 9 from the end surface 8 of the mold case, the attractiveness of the plug connector 13 having a contact pin height within a specified value can be improved.

  5 and 6 are diagrams showing another example of the shape of the protrusion 3. The example shown in FIG. 5 is an example in which the surface shape of the protrusion 3 is a hemispherical shape 10, and the example shown in FIG. By making the protrusion 3 have such a shape, the attractiveness of the plug connector 13 having a contact pin height within a specified value can be improved.

  According to the embodiment of the present invention described above, a modular jack connector that may be generated due to a poor fitting with a contact pin of a plug connector of a communication cable in a modular jack connector used in an information processing apparatus, a communication device or the like. The contact pins can be prevented from being damaged, and electrical connection failure can be prevented.

It is a perspective view explaining the structure of the modular jack connector by one Embodiment of this invention. It is sectional drawing explaining the state which is going to make the plug connector in an abnormal state fit to the modular jack connector shown in FIG. It is a front view explaining the dimensional relationship including the projection part of the modular jack connector by one Embodiment of this invention. It is sectional drawing explaining the dimensional relationship containing the projection part of the modular jack connector by one Embodiment of this invention. It is a figure which shows the other example (the 1) of the shape of a projection part. It is a figure which shows the other example (the 2) of the shape of a protrusion part. It is sectional drawing which shows the state before fitting with the modular jack connector and plug connector by a prior art. It is sectional drawing which shows the state which fitted the modular jack connector and plug connector shown in FIG. It is sectional drawing which shows the state of the modular jack connector after extracting a plug connector from the state of FIG. It is sectional drawing which shows the state before fitting with a modular jack connector and the plug connector in an abnormal state. It is sectional drawing which shows the state which fitted the modular jack connector shown in FIG. 10, and the plug connector in an abnormal state. It is sectional drawing which shows the state of the modular jack connector after extracting the plug connector of an abnormal state from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold case 2 Fitting hole 3 Protrusion part 12 Modular jack connector 13 Plug connector 14 Printed circuit board 15 Jack side contact pin 16 Plug side contact pin 19 Core wire

Claims (3)

  A modular jack connector having a plurality of contact pins and fitted with a plug connector, wherein a protrusion is provided on each plug connector insertion side of the plurality of contact pins.   The modular jack connector according to claim 1, wherein the protrusion is formed at a bottom of a fitting hole of a mold case constituting the modular jack connector. 3. The modular jack connector according to claim 1, wherein the protrusion is formed in a quadrangular prism shape, a hemispherical shape, or a quadrangular prism shape having a slope on the front surface. 4.

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