WO2008001459A1

WO2008001459A1 - Contact structure of contact in electrical connector

Info

Publication number: WO2008001459A1
Application number: PCT/JP2006/313095
Authority: WO
Inventors: Shinji Watanabe; Masatoshi Maruishi
Original assignee: Honda Tsushin Kogyo Co., Ltd.
Priority date: 2006-06-30
Filing date: 2006-06-30
Publication date: 2008-01-03
Also published as: JPWO2008001459A1; JP4961424B2

Abstract

An electrical connector has a male contact (3) on the plug side and a female contact (1 or 2) on the receptacle side. A projection (3a) is formed on either the contact section of the male contact (3) or the contact section of the female contact (1 or 2), and a recess is formed on the contact-side surface in the other contact section. In the recess, linear grooves (1c, 1d, or 2c, 2d) cross each other in a crisscross shape (1c, 1d) or an X shape (2c, 2d) or a V shape (2f). Thus, the contact between the contacts is a point contact at a corner at the crossing. This increases contact force between the contact surfaces to make electrical contact reliable and reduces contact resistance force by friction between the contacts to facilitate insertion and removal of the plug.

Description

Contact structure of electrical connector

Technical field

The present invention relates to a contact contact structure in a small and low-profile electrical connector.

Background art

[0002] Fig. 15 shows a structure for improving the reliability of contact between contacts by ensuring electrical contact between a plug-side male contact and a receptacle-side female contact in an electrical connector. A combination structure of a contact having a curved contact surface and a contact having a flat contact surface, or a contact and a groove having a rectangular contact region as disclosed in JP-A-2005-332658 In combination with a contact with a contact, a rectangular contact area is in sliding contact with the inclined surface in the groove, or the contact area of one contact as shown in FIGS. 16A and 16B A V-shaped groove portion is provided along the insertion direction, and a curved contact convex portion is provided on the other contact, and the contact convex portion is formed on the inclined surface in the groove portion or the opening edge of the groove. A structure that is in sliding contact (for example, see Japanese Patent Application Laid-Open No. 2004-303743) is known. With such a structure, the contact pressure at the contact point 12 is increased, and in the surface contact or line contact between the contacts, the electrical contact becomes uncertain due to the intrusion of dust or the like between the contact surfaces. It is to prevent.

Disclosure of the invention

Problems to be solved by the invention

However, when the female contacts 11 as shown in FIGS. 17A, 17B, and 17C are miniaturized as electronic devices are miniaturized and attached to a large number of electrical connectors, the electrical contact between the contacts is reduced. It can be difficult to ensure a connection. That is, for example, when the contact pressure P between the male contact and the female contact is constant when connecting the cable to the printed circuit board, the contact area A is reduced to ensure electrical connection between the contacts. Therefore, it is effective to increase the degree of stress (σ = Ρ / Α, unit: N / mm ² ). But traditional In order to make the contact in the contact area 1 la of the female contact 11 close to a point contact, it is bent in the plate thickness direction with respect to the longitudinal direction by bending or pressing, or in the center of the contact surface in the cross section perpendicular to the longitudinal direction. Even if it is going to be formed into a curved surface shape with a protruding shape, the curvature radius R on the longitudinal curved surface and the curved surface in the width direction are taken into account for convenience of design and manufacturing.

1

With a large radius of curvature R at, for example, a radius of curvature on a curved surface in the longitudinal direction,

2

Only R = 0.16mm was possible, and there was a limit. Also, the groove in the above prior art

1

The contacts between the contacts forming the same were also line contacts at several places, and the contact stress or contact pressure per unit area was not satisfactory.

[0004] Therefore, the contact contact structure in the electrical connector of the present invention solves such a conventional problem and sets the contact in the contact region of the contact as a point contact so that the contact stress or contact pressure per unit area is increased. The contact resistance force (F = 間の · μ, where μ is the friction coefficient) due to friction in the sliding area and contact elastic force in the contact area is reduced while increasing the electrical connection between the contacts. The purpose is to provide a contact structure outside the contour that prevents wear as much as possible.

Means for solving the problem

[0005] The contact contact structure in the electrical connector according to the present invention corresponds to the positions of the female contacts on the plurality of female contacts fixedly attached to the connector receptacle and the connector plug fitted to the connector receptacle. The contact area of one of the male and female contacts is supported integrally with the contact base force in the longitudinal direction of the contact, and the contact base force is integrally supported in the longitudinal direction of the contact. By bending in the plate thickness direction with respect to the longitudinal direction of the contact, a convex shape is formed toward the contact side, and a linear groove is formed in a cross shape, X shape or It was assumed that a recess that intersected with the V shape was formed.

[0006] In addition, the concave portion in which the linear groove intersects the cross shape, the X shape or the V shape is formed so that at least one of the linear grooves reaches the full width in the contact width direction. It is preferable that

Further, it is preferable that the contact area of one of the male and female contacts is formed in a curved shape bent at least along the longitudinal direction so that the contact side protrudes. It is more preferable to form a curved shape bent along the longitudinal direction and the width direction.

Furthermore, it is preferable that the crossing portion of the cross-shaped, X-shaped or V-shaped concave portion is located at the center in the width direction of the contact.

The invention's effect

[0007] According to the contact contact structure in the electrical connector according to the present invention, the contact area of one contact of the male contact of the connector plug and the female contact of the connector receptacle is the side in contact with the contact area of the other contact. On the surface, a concave portion is formed in which a linear groove intersects with a cross shape, an X shape or a V shape, so that a point contact is made at the corner of the intersecting portion. Theoretically, in the case of cross-shaped and X-shaped recesses, point contact is caused by four corners, and in the case of a V-shaped recess, point contact is caused by one corner. Therefore, the contact area is equivalent to a curved surface formed with a curvature radius of about R = 0.03 mm, for example, when converting the actual contact angle portion, which is extremely smaller than the conventional example, into a curvature radius, Contact stress or contact pressure per unit area is increased, and the reliability of electrical connection is improved. The contact resistance force F due to friction can be reduced by the amount that the contact area Α is reduced by setting the stress σ to be the same as the conventional one. As a result, if the contact pressure P is reduced, the contact resistance force F is also smaller than before, so that the contact can be easily inserted and removed, and the wear resistance is improved.

[0008] In addition, since at least one groove force of the linear grooves in the concave portion is formed to reach the full width in the width direction of the contact, it adheres to the contact surface in the sliding contact action when the contact is inserted and removed. Dust and the like fall into this recess by the wiping action and are removed in the width direction of the contact. Therefore, dust or the like that has entered the contact area is removed to the outside without sticking and adhering to the contact area, the contact area is cleaned cleanly, and a state free of dust or the like is maintained.

[0009] It should be noted that since the male contact is more likely to adhere to the flux when soldered to the cable, the male contact protruding to the outside is more likely to adhere foreign matter such as dust than the female contact. If the recess is provided in the contact area of the female contact so that the flux and foreign matter adhering to the contact can be removed at the contact point of the female contact, The edge part of a recessed part works like a knife edge, and can exclude a foreign material effectively.

[0010] Further, the contact area of one of the male and female contacts is formed in a curved shape at least along the longitudinal direction so that the contact side protrudes, thereby further increasing the stress degree of the contact area of the contact. Will increase. In addition, the crossing portion of the straight groove in the concave portion is located in the center in the width direction of the contact. , It will not stay in the contact area.

Brief Description of Drawings

FIG. 1 is a perspective view showing a contact contact structure in a first embodiment of an electrical connector according to the present invention.

FIG. 2A is a side view of the contact in the first embodiment.

FIG. 2B is a plan view of the contact in the first embodiment.

FIG. 2C is a front view of the contact in the first embodiment.

2D is a cross-sectional view taken along the line AA in FIG. 2C of the contact in the first embodiment.

FIG. 3 is a perspective view showing a contact contact structure in a second embodiment of the electrical connector according to the present invention.

FIG. 4A is a side view of the contact in the second embodiment.

FIG. 4B is a plan view of the contact in the second embodiment.

FIG. 4C is a front view of the contact in the second embodiment.

FIG. 4D is a cross-sectional view taken along the line BB in FIG. 4C, of the contact in the second embodiment.

FIG. 5 is a process diagram for explaining a method of forming a recess having a groove force intersecting in a contact region of a contact in a contact terminal material.

FIG. 6A is a front view showing a first example of a contact in which a V-shaped recess is formed in the contact region. FIG. 6B is a front view showing a second example of a contact in which a V-shaped recess is formed in the contact region. Is [6C] is a front view showing a third embodiment of a contact in which a V-shaped recess is formed in the contact area. [7A] is a cross-sectional view of a female contact having a curved contact surface formed along the width direction. is there.

FIG. 7B is an explanatory view showing a method of forming a curved contact surface formed along the width direction of the female contact.

[8A] FIG. 8A is a cross-sectional view for explaining the contact state related to the inclination in the width direction in the contact region of the contact.

FIG. 8B] is a cross-sectional view for explaining a contact state related to displacement in the contact region in the width direction outside the contour.

FIG. 9 is a partially enlarged cross-sectional view showing a corner portion at an intersecting portion of a concave portion of a contact.

FIG. 10A is a front view showing a connector receptacle.

FIG. 10B is a plan view showing the connector receptacle.

FIG. 10C is a side view showing the connector receptacle.

FIG. 10D is a sectional view taken along the line CC in FIG. 10B.

FIG. 11A is a plan view showing a connector plug with half of the connector plug without a shell.

FIG. 11B is a side view showing the connector plug.

FIG. 11C is a front view showing the connector plug.

FIG. 11D is a bottom view showing the connector plug.

FIG. 11E is a cross-sectional view taken along the line DD in FIG. 11C.

FIG. 12A is a front view of a male contact.

FIG. 12B is a plan view of the male contact same as above.

FIG. 13A is a cross-sectional view showing a state of a contact region in a fitting state between the connector plug and the connector receptacle.

FIG. 13B is an enlarged cross-sectional view of the contact region in FIG. 13A.

FIG. 14A is a cross-sectional view showing a state in which the connector plug is tilted when the connector plug and the connector receptacle are fitted together.

14B] is an enlarged cross-sectional view showing the contact area in FIG. 14A. FIG. 15 is a cross-sectional view showing a contact state between contacts according to a conventional example.

FIG. 16A is a cross-sectional view showing a contact state of a contact in a conventional connector.

FIG. 16B is a cross-sectional view showing a contact state of another conventional connector.

FIG. 17A is a perspective view showing a contact of an electrical connector according to a conventional example.

FIG. 17B is a side view showing the contact.

FIG. 17C is a transverse sectional view showing the outside of the contour.

BEST MODE FOR CARRYING OUT THE INVENTION

[0012] An electrical connector according to the present invention is an electrical connector comprising a connector receptacle and a connector plug. For example, as shown in FIG. 13A, a connector receptacle 4 having a female contact 1 or 2 has a male contact 3. Connector plug 6 is connected. 1 to 2D show the contact structure of the female contact 1 according to the first embodiment of the electrical connector according to the present invention. The contact region la of the female contact 1 is bent multiple times from the contact base 1b in the longitudinal direction of the contact 1 and is elastically integrated and supported, and is bent along the longitudinal direction to contact side A cruciform recess formed by grooves lc and Id is formed on the contact side surface of the contact region 1a.

As shown in FIGS. 3 to 4D, in the female contact 2 of the second embodiment of the electrical connector according to the present invention, in the contact region 2a, a recess composed of grooves 2c and 2d intersecting with the X shape is formed. ing . Further, in the third embodiment, as shown in the first to third specific examples of FIGS. 6A to 6C, the concave portion 2 that intersects with the V shape (there is also the case that it is upside down in the figure) is formed. And

[0014] In the cross-shaped, X-shaped or V-shaped concave portion, at least the groove lc or 2c or the concave portion 21¾ is formed to reach the full width in the width direction of the contact 1 or 2. The X-shaped recess grooves 2c and 2d and the V-shaped recess 2f are formed over the entire width of the contact 2, and all end portions are open to the outside of the side of the contact.

[0015] This is for reliably removing dust and the like from the concave portion and the groove force to the outside. For example, when dust or the like adheres to the male contact 3 side of the connector plug 6, it is caused by sliding contact with the female contact 1 or 2 when the connector plug 6 is fitted to the connector receptacle 4 for electrical connection. Dust and the like are cleaned by the wiping action and fall into the grooves lc, Id or the grooves 2c, 2d or the recess 2f. At this time, the recess is formed over the entire width of the contact 1 or 2. At the same time, if the end of the concave portion is not open to the outside of the side, it will accumulate without being discharged from the contact area to the outside. In order to avoid this, a recess is formed over the entire width of the contact so that dust and the like are discharged to the outside in the width direction of the contact, and the contact is opened up to the side wall of the contact.

[0016] The method of forming the recesses in the contact areas la, 2a of the female contact is described by using, for example, an X-shaped recess. As shown in FIG. 5, a contact terminal material 5 is prepared. A groove 5a is formed on the surface of 5, and a groove 5b is formed so as to intersect the groove 5a as shown in the figure. The grooves 5a and 5b are formed longer than actually required. Then, the slits 5c and 5d are cut to a required width. After that, the contact terminal material cut to the required width is formed into a female contact 2 by performing a bending force check or the like.

[0017] In the case of forming a concave portion 2¾ crossing the V shape as shown in Figs. 6A to 6C, a female contact is used by using a mold provided with a V-shaped protrusion corresponding to the concave portion 2f. May be formed at once. Further, in the contact area la, 2a of the contact, the concave portions lc, ld, 2c, 2d are simultaneously bent when bending into a curved surface having a radius of curvature R in the plate thickness direction (sliding direction) with respect to the longitudinal direction.

1

, 2¾ may be formed.

[0018] In one of the male and female contacts, for example, the contact regions la and 2a of the female contacts 1 and 2, the surface on the contact side is convex outward along the width direction as shown in FIG. 7A. Radius R

It has a two-sided shape. As shown in FIG. 7B, this forming method is based on compression molding by pressing in the plate thickness direction. The bending of the contact area in the longitudinal direction is performed by bending. In this manner, a cross-shaped, X-shaped, and V-shaped recess is formed in the contact area of the contact.

The cross-shaped concave portion lc, ld, or the crossing portion of the concave portions 2c, 2d, 2f intersecting the X-type and V-type is located at the center in the width direction of the contact 2. This is because even if the contact area la formed by a concave portion such as a cross shape is in contact with either the left or right side as shown in FIG. 8A, the edge of the concave or groove This is to ensure contact in at least one of the parts. Further, as shown in FIG. 8B, even when the contact area of the male and female contacts is shifted in the contact plate width direction when the connector is fitted, a certain amount of mark is This is to have gin. Further, this is because the contact areas la and 2a can be easily bent and compression-molded in the plate thickness direction (sliding direction) and the plate width direction.

[0020] By the way, when comparing the above-mentioned conventional example with the female contacts 1 and 2 in which the cross-shaped, X-shaped, and V-shaped concave portions are formed in the contact areas la and 2a, for example, in contact stress The conventional example is 30 38 (N / mm ² ), and in the present invention it is 5620 (N / mm ² ), which is about 1.85 times. In this way, in the contact area, as shown in Fig. 9, the contact of the corner If at the intersection of two intersecting recesses becomes a point contact, and the contact area becomes extremely small, so the contact stress per unit area Or the contact pressure is doubled. In addition, the pressing force due to the elastic force of the contact can be reduced by the amount of stress in the contact area increasing. That is, if the contact resistance force F caused by the friction between the male and female contacts is set to be reduced to reduce the resistance force during connector insertion / removal, the insertion / extraction operation for removing the connector receptacle / connector plug becomes easier.

[0021] A plurality of such female contacts 1 or 2 are press-fitted into the contact housing portion of the connector receptacle 4 as shown in FIGS. 10A to 10D. Further, as shown in FIGS. 11A to 11E, a plurality of male contacts 3 are provided in the contact housing portion of the connector plug 6 by integral molding.

[0022] As shown in FIGS. 11E, 12A, and 12B, the male contact 3 is provided with a protrusion 3a that protrudes toward one of the contacts (female contacts 1, 2) at the bottom of the contact area. ing . By forming the protrusion 3a, as shown in FIGS. 13A, 13B, 14A, and 14B, vibration and impact are applied in the sliding direction in a state where the connector plug 6 is fitted to the connector receptacle 4. When this occurs, the protrusion 3a is caught between the tip portions le and 2e of the female contacts 1 and 2 that are one of the contacts and the contact areas la and 2a, and is locked so that the contacts are not disengaged. Is.

Industrial applicability

[0023] The contact contact structure in the electrical connector according to the present invention is not limited to the electrical connector, and can be applied to, for example, an electrical switch contact structure.

Claims

The scope of the claims

[1] A plurality of female contacts fixedly attached to the connector receptacle and a plurality of male contacts fixedly attached to the connector plug fitted to the connector receptacle corresponding to the position of the female contact; In this contact structure, the contact area of one contact of the male and female contacts is supported integrally with the contact base force in the longitudinal direction of the contact, and in the plate thickness direction with respect to the longitudinal direction of the contact. By bending, a convex shape is formed toward the contact side, and on the contact side surface of the contact area, a concave portion is formed in which a linear groove intersects the cross shape, the X shape, or the V shape. Being

The contact structure of the contact in the electrical connector characterized by this.

[2] The concave portion formed by intersecting a straight groove with a cross shape, an X shape or a V shape has at least one of the straight grooves in the width direction of the contact! Formed! 、

The contact structure of the contact in the electrical connector according to claim 1.

[3] The contact area of one of the male and female contacts is formed in a curved shape along the longitudinal direction so that the contact side protrudes;

The contact structure of the contact in the electrical connector according to claim 1 or 2,

[4] The contact area of one of the male and female contacts is formed in a curved shape along the longitudinal direction and the width direction so that the contact side protrudes,

[5] The intersecting portion of the concave portion in which the linear groove intersects the cross shape, the X shape or the V shape is located in the center in the width direction of the contact,