JP2010153313A - Conduction inspection method of electrical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for inspecting conduction by contacting a probe on the outer surface of a contact even when the contact cannot have a contact surface orthogonal to a travelling direction of the probe on the outer side surface of the contact. <P>SOLUTION: In this conduction inspection method, conduction of the contact 30 is inspected by contacting the probe 40 for conduction inspection inserted into a probe passage 25 formed on a housing 20 on the outer side surface of the contact 30. In this case, a probe displacement restricting projection 26 for restricting displacement of the probe 40 occurring when the probe 40 is in contact with the contact 30 is formed on an inner wall of a front end side housing 20A. As directions of a reaction force composition F<SB>1y</SB>and a reaction force composition F<SB>2y</SB>(-F<SB>1y</SB>) are opposite and magnitude of them are same, the reaction force composition F<SB>1y</SB>and reaction force composition F<SB>2y</SB>are canceled and displacement of the probe 40 in the y-direction is restricted. Therefore, even when the probe is pressed in strongly, the displacement of the probe 40 in the y-direction is restricted and breakage caused by bending deformation does not occur. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for inspecting contact continuity in an electrical connector (hereinafter simply referred to as a connector) in which a plurality of contacts are housed in a housing.

  In an electrical connector in which a male connector and a female connector are fitted, a plurality of cavities are formed in each housing, and a contact in which an end of an electric wire is connected is accommodated in each cavity. In order to prevent erroneous wiring of the electric wires to the contacts or to prevent poor connection between the electric wires and the contacts, the connector is subjected to a continuity test.

  This continuity test is basically performed by bringing a probe for continuity test (probe: hereinafter referred to simply as a probe) into contact with a contact. In the case of a female connector, for example, as shown in Patent Document 1, a method of inserting a probe into a female contact is known. In this method, the probe may penetrate deeply into the contact for some reason, and the contact may be damaged.

  Therefore, for example, as disclosed in Patent Document 2, a method of bringing a probe into contact with the outer surface of a contact has been proposed.

Japanese Patent Laid-Open No. 2001-110526 (FIG. 9) Japanese Patent Laying-Open No. 2005-123029 (FIG. 9)

In general, the diameter of the probe insertion opening is larger than the diameter of the probe so that the probe can easily enter. However, when the opening has such a large diameter, the probe having a small diameter is easily inclined and displaced during the inspection. Usually, the probe is thin, and if it is tilted and displaced during the inspection, the probe may be twisted from the base of the probe and may exceed the elastic range of the base. However, if the size of the insertion opening of the probe is approximately the same as the diameter of the probe, the probe becomes difficult to enter, which may hinder the inspection.
In order to prevent the probe from tilting, it is necessary that the contact surface of the contact and the traveling direction of the probe be orthogonal to each other when the probe is brought into contact with the outer surface of the contact. In particular, if the contact surface is inclined with respect to the direction of travel of the probe, if the tip of the probe touches this inclined contact surface, the probe tip is positively displaced, causing the probe to deform beyond the elastic range. May end up. Therefore, in the case of a connector in which a contact surface orthogonal to the traveling direction of the probe cannot be provided on the outer surface of the contact, there has been a case where a method of inserting the probe into the contact has been performed so far.
The present invention has been made based on such a problem, and it is more effective that a probe having a small diameter is easily inclined and displaced during an inspection even if the opening has a diameter larger than the diameter of the probe. It is an object of the present invention to provide a method for inspecting conduction by bringing a probe into contact with the outer surface of a contact.

For this purpose, the present invention provides an electrical connector comprising a contact and a housing having a cavity for accommodating the contact, wherein the continuity test probe is brought into contact with the outer surface of the contact via the continuity test path. In the method of inspecting continuity of the contact, the continuity inspection passage is inspected for continuity by making the diameter at the position corresponding to the tip of the probe smaller than the diameter of the opening. And
According to the inspection method of the present invention, the diameter at the position corresponding to the tip of the probe is made smaller than the diameter of the opening, so that the probe can be prevented from tilting during the inspection.
In the present invention, in order to make the size of the diameter at the position corresponding to the tip of the probe smaller than the size of the diameter of the opening, a protrusion may be provided on the inner wall of the position corresponding to the tip of the probe. it can.
According to the connector continuity inspection method of the present invention, even if the probe is to be displaced by contacting the contact, the displacement is restricted by the protrusion provided on the inner wall of the housing. Therefore, even if the contact surface of the contact is inclined with respect to the traveling direction of the probe, the probe for continuity inspection is not deformed.

  The continuity inspection method of the present invention can also be applied to a case where the traveling direction of the probe and the axial direction of the contact intersect as in Patent Document 2 (FIG. 9), for example. However, in this case, in a connector having three or more contacts in the vertical direction, it is difficult to contact the probe except for the uppermost and lowermost contacts. This is because it is difficult to form a passage through which the probe proceeds with respect to the contact between the uppermost stage and the lowermost stage. Therefore, in the continuity inspection method of the present invention, it is preferable that the traveling direction of the probe and the axial direction of the contact be parallel. According to this embodiment, even in a connector having three or more contacts in the vertical direction, the probe can be brought into contact with all the contacts, so all of so-called multipolar connectors having a large number of contacts can be used. A continuity test can be performed on the contacts.

  In the continuity inspection method of the present invention, even when the contact side contact surface with which the probe contacts is inclined with respect to the traveling direction of the probe, the displacement is regulated by the protrusion provided on the inner wall of the housing. That is, even if the connector cannot be provided with a terminal-side contact surface orthogonal to the traveling direction of the probe on the outer surface of the contact, the probe can be brought into contact with the outer surface of the contact to conduct a continuity test. However, the continuity inspection method of the present invention can be applied to cases other than when the terminal-side contact surface is inclined with respect to the traveling direction of the probe. For example, it is effective to apply the present invention when there is a possibility that the probe (side contact surface) is displaced from the terminal side contact surface because the area of the terminal side contact surface is small.

  Furthermore, in the continuity inspection method of the present invention, it is preferable that the protrusion has a protrusion-side contact surface along the probe-side contact surface. Since the protrusion-side contact surface is along the tip shape of the probe, the probe tip side surface fits the protrusion and the probe is more difficult to tilt.

  In the continuity inspection method for a connector according to the present invention, even if the probe is displaced by contact with the contact surface on the contact side, the displacement is restricted by the protrusion provided on the inner wall of the housing. Therefore, even if the contact surface of the contact is inclined with respect to the traveling direction of the probe, the probe is not deformed. Therefore, according to the present invention, even if the connector cannot be provided with a contact surface orthogonal to the traveling direction of the probe on the outer surface of the contact, the continuity test can be performed by bringing the probe into contact with the outer surface of the contact.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a partial perspective view of a connector (electrical connector) 10 according to the present embodiment as viewed from a side mated with a mating connector (not shown; hereinafter the same), and FIGS. It is a fragmentary longitudinal cross-sectional view, and is a figure which shows the state before inserting the probe 40 for a continuity test. In addition, in the connector 10, the side fitted to the mating connector is defined as the front, and the opposite side is defined as the rear.
As shown in FIGS. 1 to 3, the connector 10 includes an insulating housing 20 and a plurality of conductive contacts 30.

The housing 20 that holds the plurality of contacts 30 is configured by assembling a front end side housing 20A, an intermediate housing 20B, and a rear end side housing (retainer) 20C that are manufactured by injection molding of resin.
The housing 20 is provided with a front end face 21 on the side on which the mating connector is fitted. The front end face 21 has a terminal insertion opening 23 into which a male contact held by the mating connector is inserted. A cavity 22 connected to the terminal insertion opening 23 is formed across the front end side housing 20A, the intermediate housing 20B, and the rear end side housing 20C. A plurality (three or more rows) of cavities 22 (terminal insertion openings 23) are arranged along the vertical direction and the width direction of the housing 20. A housing lance 28 for locking the contact 30 is provided in the intermediate housing 20B. The rear end of the housing lance 28 is connected to the intermediate housing 20B. The contact 30 is retained by being locked to the front end side of the housing lance 28.

  In the housing 20, a probe insertion opening 24 is opened in the front end surface 21 adjacent to each terminal insertion opening 23, and a probe passage 25 is formed in the front end side housing 20 </ b> A continuously to the probe insertion opening 24. The formation direction of the probe passage 25, that is, the traveling direction of the probe 40 is formed in parallel with the axial direction of the cavity 22, that is, the contact 30. A probe displacement restricting protrusion 26 protruding toward the contact 30 is provided on the inner wall facing the probe passage 25 of the front end side housing 20A. The probe displacement restricting protrusion 26 includes a protrusion-side contact surface 27 formed of an inclined surface that descends from the inner wall of the front end side housing 20A toward the tip thereof. The probe 40 to be described later advances in the probe passage 25 until it contacts the projection-side contact surface 27 facing the front end side of the connector 10.

  The female contact 30 is formed by punching a thin metal plate and bending it so that the front end side is formed in a box shape, and an insertion space 31 into which the male counterpart contact is inserted is formed inside. A contact arm 32 extending from the front end side toward the rear end side of the contact 30 protrudes into the insertion space 31, and the counterpart contact inserted into the insertion space 31 exclusively contacts the contact arm 32, thereby causing the contact 30. The electrical connection with is secured. The contact 30 is made of a highly conductive and highly elastic material such as a copper alloy.

The contact 30 includes a probe contact piece 33 on the outer surface on the front end side. The probe contact piece 33 includes a terminal side contact surface 34 formed of an inclined surface rising from the front end side toward the rear end side at the front end. The probe 40 described later advances in the probe passage 25 until it contacts the terminal side contact surface 34 facing the front end side of the connector 10.
The contact 30 includes a locking piece 35 adjacent to the probe contact piece 33. When the locking piece 35 is locked to the front end side of the housing lance 28, the contact 30 is prevented from coming off.

  In a state where the contact 30 is held at a predetermined position of the cavity 22, the probe displacement restricting protrusion 26 provided on the inner wall of the front end side housing 20 </ b> A is provided at a position facing the probe contact piece 33 of the contact 30. In addition, the projection-side contact surface 27 of the probe displacement regulating projection 26 and the terminal-side contact surface 34 of the contact 30 are arranged at substantially symmetrical positions, and the projection-side contact surface 27 and the terminal-side contact surface 34 form a tapered surface. It is composed.

  When conducting a continuity test on the connector 10, as shown in FIGS. 4 and 5, the probe 40 is inserted from the probe insertion opening 24 and pushed toward the back of the probe passage 25. The probe 40 is pushed in until its tip abuts against the terminal-side contact surface 34 of the contact 30, and the continuity test is performed in this state. The probe 40 is connected to an appropriate continuity testing device, but since this point is well known, the description thereof is omitted.

The connector 10 receives the reaction force F ₁ from the terminal side contact surface 34 when the tip of the probe 40 abuts against the terminal side contact surface 34 of the contact 30. As shown in FIG. 5, the reaction force F ₁ is generated in a direction perpendicular to the tangent line between the probe 40 and the terminal-side contact surface 34. The reaction force F ₁ has a reaction force component F _{1x in} the axial direction (x direction) of the probe 40 and a reaction force component F _1y in a direction (y direction) perpendicular thereto. If the probe 40 is pushed too hard, the tip of the probe 40 may be displaced toward the front end side housing 20A.

However, the connector 10 includes the probe displacement restricting protrusion 26, and the protrusion-side contact surface 27 is symmetric with the terminal-side contact surface 34. Therefore, almost simultaneously with the contact of the tip of the probe 40 with the terminal-side contact surface 34, the tip of the probe 40 also strikes the projection-side contact surface 27 of the probe displacement regulating projection 26, as shown in FIGS. 4 and 5. Then, the probe 40 receives the reaction force F ₂ from the protrusion side contact surface 27. As shown in FIG. 5, the reaction force F ₂ is generated in a direction perpendicular to the tangent line between the probe 40 and the protrusion-side contact surface 27. The reaction force F ₂ has a reaction force component F _{2x in} the axial direction (x direction) of the probe 40 and a reaction force component F _2y in a direction (y direction) perpendicular thereto.

Here, since the reaction force component F _1y and the reaction force component F _2y (−F _1y ) have opposite directions and the same magnitude, the reaction force component F _1y and the reaction force component F _2y cancel each other. The displacement of the probe 40 in the y direction is restricted. Therefore, even if the probe 40 is pushed in strongly, the displacement of the probe 40 in the y direction is restricted, and damage due to bending deformation does not occur.

  In the connector 10, the protrusion-side contact surface 27 and the terminal-side contact surface 34 are symmetrical, so that when the tip of the probe 40 abuts against the terminal-side contact surface 34, it abuts against the protrusion-side contact surface 27 almost simultaneously. This configuration is most preferable for the present invention because the tip of the probe 40 is not displaced in the y direction. However, the present invention is not limited to this form. Since the displacement of the probe 40 is allowed within a range where it is not damaged, the protrusion-side contact surface 27 may be displaced from the symmetrical position with respect to the terminal-side contact surface 34, or the protrusion-side contact surface 27 is symmetrical. It may be a form not having.

Although the connector 10 is an inclined surface that inclines the terminal-side contact surface 34 at a predetermined angle with respect to the traveling method of the probe 40, the present invention is not limited to this.
For example, as shown in FIG. 6, the present invention can also be applied when the front end surface of the probe contact piece 133 is orthogonal to the traveling method of the probe 40. That is, when the area of the front end surface of the probe contact piece 33 is small, the tip of the probe 40 may be displaced in the y direction when the tip of the probe 40 is abutted. In such a case, providing the probe displacement restricting protrusion 26 is effective for preventing the deformation of the probe 40.

In the connector 10, the probe 40 is inserted from the front end surface of the housing 20, and the traveling direction of the probe 40 and the axial direction of the contact 30 are parallel. This configuration is suitable for the connector 10 that is multipolar and compact, because the area occupied by the probe passage 25 in the vertical direction of the housing 20 is minimized.
However, the present invention is not limited to the form in which the traveling direction of the probe 40 and the axial direction of the contact 30 are parallel. The present invention can also be applied to a form in which the traveling direction of the probe 40 and the axial direction of the contact 30 intersect. If the crossing angle is small, it can be applied to the multipolar connector 10.
Further, the present invention can be configured such that the probe 40 is inserted from, for example, the top (or bottom) of the housing 20. However, this form is limited to application to the connector 10 in which the contacts 30 are arranged in two rows in the vertical direction.

Furthermore, although the connector 10 has the protrusion-side contact surface 27 (or the terminal-side contact surface 34) as a linear inclined surface, the present invention is not limited to this. For example, as shown in FIG. 7, the protrusion-side contact surface 27 (or the terminal-side contact surface 34) can be a curved surface, or other forms can be adopted. However, for the probe 40 having a spherical tip, the tip of the probe 40, that is, the protrusion-side contact surface 27 (or the terminal-side contact surface 34) along the contact surface, like a linear inclined surface or a curved inclined surface. It is preferable to do.
Furthermore, the contact 30 is not limited to the box shape, and can be selected and applied as appropriate.

  In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

It is the fragmentary perspective view which looked at the connector which concerns on this Embodiment from the side fitted with the other party connector. It is a fragmentary longitudinal cross-sectional view of the connector which concerns on this Embodiment, and is a figure which shows the state before inserting the probe for a continuity test | inspection. FIG. 3 is a partially enlarged sectional view of FIG. 2. It is a fragmentary longitudinal cross-sectional view of the connector which concerns on this Embodiment, and is a figure which shows the state which inserted the probe for continuity inspection. It is a partial expanded sectional view of FIG. It is a partial expanded sectional view which shows the other connector which concerns on this Embodiment, and shows the example in which the front end surface of a probe contact piece orthogonally crosses with the advancing method of a probe. It is a figure which shows the other example of a protrusion side contact surface.

Explanation of symbols

10 ... Connector (electrical connector),
DESCRIPTION OF SYMBOLS 20 ... Housing, 22 ... Cavity, 25 ... Probe passage, 26 ... Probe displacement control protrusion, 27 ... Projection side contact surface 30 ... Contact, 33 ... Probe contact piece, 34 ... Terminal side contact surface 40 ... Probe (probe for continuity inspection) )

Claims (5)

In an electrical connector comprising a contact and a housing having a cavity for accommodating the contact,
A method for inspecting the continuity of the contact by contacting a continuity inspection probe with the outer surface of the contact through a continuity inspection path,
An electrical connector continuity inspection method for inspecting continuity of the passage by making the diameter at a position corresponding to the tip of the probe smaller than the diameter of the opening.   The electrical connector continuity inspection method according to claim 1, wherein a protrusion is provided on the inner wall at a position corresponding to the tip of the probe to make the diameter smaller than the diameter of the opening.   The electrical connector continuity inspection method according to claim 1, wherein the traveling direction of the probe and the axial direction of the contact are substantially parallel.   4. The electrical connector continuity inspection method according to claim 1, wherein the terminal-side contact surface is inclined with respect to a traveling direction of the probe.   5. The electrical connector continuity inspection method according to claim 2, wherein the protrusion includes a protrusion-side contact surface along the probe-side contact surface. 6.

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