JP2004193079A - Connector for electroexplosive ignition device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a perfect waterproofing functionality in fitting and connecting a connector. <P>SOLUTION: A connector for an electroexplosive ignition device of this invention comprises: a pair of conductor wires; a ferrite member covering at least part of the pair of conductor wires; and an insulating housing that accommodates the pair of conductor wires and a connector barrel part having an axial hole and holding the pair of conductor wires in the axial hole. This connector is to be fitted and connected to a counterpart connector. This connector has an elastic member provided to circumferentially cover part of the outer surface of the insulating housing and forming a sealing part between this connector and the corresponding connector, and a locking projection on the outer surface of the insulating housing for fitting and connection to the corresponding connector. The length of a region of the sealing part capable of sealing a region in contact with the corresponding connector is greater than the distance between the locking projection and a part to be locked of the corresponding connector. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electrical connector for an electric fuse ignition device that activates an airbag.
[0002]
[Prior art]
[Patent prior literature]
Japanese Patent No. 3247932 Japanese Patent Application Laid-Open No. 2000-294343
The existence of an airbag is well known as a device for protecting a vehicle occupant. This system protects a driver by, for example, instantaneously filling gas stored in a bag folded inside a handle portion in the event of a collision.
[0004]
Here, an explosive mixture is used to fill the gas into the airbag. When an acceleration exceeding a predetermined value is sensed during a collision, an acceleration sensor transmits an electric signal to an electric fuze igniter, and the electric fuze ignites the explosive mixture to explode the mixture and generate gas in the gas generator. Let it.
[0005]
In a typical example of an airbag system, a folding airbag, an explosive mixture, and an electric fuse ignition device are housed near a handle shaft portion, and a sensor is arranged near a central portion of a vehicle body in wiring connected to a vehicle electric system. You. The wiring from the battery to the electric system connected via the sensor passes through the steering column and is connected by a connector near the center of the steering wheel to reach the electric fuse ignition device.
[0006]
Japanese Patent No. 3247932 relates to an ignition tube connector in an airbag system. The invention disclosed in this publication has the problem of the prior art in which the electric wire connection portion of the electric contact is positioned by the two holes of the ferrite bead and the ferrite bead is fixed to the insulating housing by insert molding, that is, the injection at the time of insert molding. Due to the displacement of the ferrite beads with respect to the insulating housing due to pressure or the displacement of the ferrite beads in the two holes of the electric contacts, the positioning of the electric contacts with respect to the insulating housing is not accurate, and the pin terminals of the ignition tube are properly electrically connected. The present invention has solved the problem that a connection cannot be made to a contact. In order to solve this problem, the present invention provides an ignition tube connector that accurately positions an electric contact with respect to an insulating housing, and that can accurately and appropriately fit and connect a pin terminal of the ignition tube to the electric contact. .
[0007]
Also, the invention disclosed in Japanese Patent Application Laid-Open No. 2000-294343 relates to an electric fuse ignition device in an airbag system, in which the airbag must operate reliably in an emergency, while operating normally. Conventional technology that pays attention to the problem that even if there is a connection error in the connector, it may not be found at normal times even if there is no connection, and considers the wiring work by color coding of the conductor protruding from the ignition device toward the connector An object of the present invention is to provide a connector for an electric fuse-ignition device which can completely eliminate the possibility of a connection error as compared with the above.
[0008]
[Problems to be solved by the invention]
Here, in either of the ignition devices of the cited documents, from the viewpoint of preventing a malfunction such that the airbag does not operate except in an emergency, the airbag is connected to the connector connection portion as a measure against the induction current to the wiring to the ignition device. Countermeasures such as adding ferrite have been taken. However, neither cited document describes a protective measure against water droplets which may cause an electrical short circuit in the connector and invade from the outside or dew drops generated due to a temperature difference in the vehicle. Therefore, there is a demand for a connector that can be fitted and connected with higher sealing performance than before in view of the protective measures that cause this problem.
[0009]
[Means for Solving the Invention]
In order to solve the above-mentioned problems, in the present invention, the connector itself is provided by disposing a seal member (elastic member) on an outer surface of the connector housing of the present application in order to ensure waterproofness of a fitting connection portion with a corresponding connector. It has been found that the mating connection realizes the perfect waterproof function.
[0010]
According to an embodiment of the present invention, a connector for an electric fuze ignition device according to the present invention includes a pair of conductive wires, a ferrite member covering at least a part of the pair of conductive wires, the pair of conductive wires, and an axial hole. A connector for an electric fuze igniter fitted and connected to the pair of connectors, the connector comprising: an insulating housing accommodating a connector body holding the pair of conductors in the axial hole. An elastic member provided so as to circumferentially cover a part of the outer surface of the body and forming a sealing portion with a corresponding connector; and an elastic member for fittingly connecting the corresponding connector on the outer surface of the insulating housing. A distance between the region of the sealing portion that has a locking projection and can seal a region in contact with the corresponding connector is larger than a distance between the locking projection and a locked portion of the corresponding connector. It is characterized by being large.
[0011]
The elastic member forming the sealing portion provided in the connector of the present invention can elastically and liquid-tightly seal the contact portion with the corresponding connector when the connector is fitted and connected to the corresponding connector. On the other hand, the connector of the present application is provided with a locking projection having a function of engaging with the corresponding connector, and the locking projection and the engaged portion of the corresponding connector are spaced apart in the connector fitting direction. Have. On the other hand, the contact portion between the elastic member of the connector of the present application and the corresponding connector also has a wider gap in the fitting direction than the gap between the locking projection and the engaged portion of the corresponding connector. . Therefore, even if the locking projection of the connector of the present application moves the space (play portion) between the corresponding connector and the engaged portion, the elastic member forming the sealing portion always makes contact with the corresponding connector. Therefore, the contact portions between the connectors can be securely sealed in a liquid-tight manner, and a complete waterproof function is realized.
[0012]
According to another embodiment of the present invention, in the connector for an electric fuse ignition device according to the present invention, the mating connection is not removable.
[0013]
For example, when the connector of the present application has a complete pull-out preventing function, that is, a so-called mating function in only one direction due to mating when mating connection with a corresponding connector, occurrence of disconnection due to impact of the connector or the like is prevented. Can be prevented.
[0014]
According to yet another embodiment of the present invention, the electrical fuse ignition device connector according to the present invention is manufactured by an overmolding method.
[0015]
For example, if the connector of the present application is molded by an overmolding method, the waterproof function of the connector itself is also perfect, and the waterproof property of the connector itself and the waterproof property of the fitting contact portion with the corresponding connector are ensured. And complete waterproof function.
[0016]
According to still another embodiment of the present invention, the electric fuse ignition device connector according to the present invention includes an outer surface portion of at least a part of the insulating housing, wherein the engagement protrusion portion is provided in the fitting connection direction. A convex portion is defined so that the sealing portion is located therebetween.
[0017]
For example, if a convex portion is defined at a position on the outer surface of the insulating casing facing the locking projection via an elastic member forming a sealing portion surrounding the outer surface of the insulating casing, the elastic member is Even when receiving a pressing force from the contact portion of the corresponding connector in the opposite direction to the connection direction at the time of fitting, the connector is engaged and fixed. Therefore, the elastic member can provide a stable liquid-tight state.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a perspective view of an exemplary connector 1 of the present invention. The configuration of the connector includes a pair of conductive wires 12, a ferrite member covering at least a part of the pair of conductive wires 12, the pair of conductive wires 12, and a Y-axis direction hole. And an insulative housing (an internal structure is omitted) accommodating a connector body holding the conducting wire 12, and is fitted and connected to the corresponding connector in the X-axis direction. The insulating casing is integrally formed by an overmolding method in order to completely prevent moisture from entering the inside. At the rear end of the cylindrical portion of the connector having a circular connection cross section 11 extending in the X-axis direction (insertion direction) orthogonal to the Y-axis, a substantially semicircle projecting in the Y-axis direction from the housing portion 2 of the ferrite member. A rectangular protrusion 4 extending in the X-axis direction is defined on the surface 3 of the shape. In addition, a circumferential defining portion 5 whose top surface is flush and orthogonal to the long axis direction (X direction) of the rectangular convex portion 4 is projected from the surface 3. The O-shaped elastic member 6 has a rectangular portion defined by opposing the wall of the defining portion 5 and the rectangular convex portion 4 in the X-axis direction via the defining portion 5 and the elastic member 6. 8 so as to form a hermetically sealed portion with the corresponding connector. The engaging claw 7 forming the engaging portion with the corresponding connector extends so as to increase the circumferential diameter while being separated from the surface portion 3 in the direction of the elastic member. A projection 9 having a surface perpendicular to the surface 3 is provided at the tip of the engagement claw 7. The surface of the projecting portion 9 perpendicular to the surface portion 3 comes into contact with and is locked by the locked surface 10 with the corresponding connector (see FIG. 5). Inside the connection section 11, a recess for receiving a defined portion protruding from the corresponding connector together with the conductive portion is defined, and realizes electrical connection at the time of fitting connection.
[0019]
In order to understand the connector for an electric fuse of the present invention, shapes based on various viewpoints are illustrated in FIGS. 2 to 4 together with the following brief description. FIG. 2 is a front view based on the viewpoint in the Z direction of FIG. FIG. 3 is a front view based on the viewpoint in the Y-axis direction of FIG. FIG. 4 is a front view based on the viewpoint in the X-axis direction of FIG. The same parts are given the same numbers.
[0020]
FIG. 5 is a side cross-sectional view when the electric fuse ignition device connector of the present invention is fitted and connected to a corresponding connector. As shown in the drawing, the movable distance of the contact point in the insertion direction of the corresponding connector between the elastic member 6 forming the sealing portion and the insertion direction of the corresponding connector is indicated by a, and the relationship between the top surface of the engagement protrusion 9 and the corresponding connector is indicated. The distance (play) from the meeting surface is indicated by b. Here, since the interval a is larger than the interval b, even if the connector of the present application moves by the interval b inside the corresponding connector, the elastic member 6 always forms a sealing portion at a contact portion with the corresponding connector. . Therefore, a complete waterproof function can be realized.
[0021]
【effect】
The electrical fuse ignition device connector of the present invention is manufactured by the overmolding method, and the waterproofness of the connector itself and the sealing area when the mating connection with the corresponding connector is made larger than the clearance between the locking section and the play. Since it is wide, it always seals the fitting connection part in a liquid-tight manner, that is, it has the waterproof property of the fitting connection part, and has the effect of securing these waterproof properties and realizing the perfect waterproof function.
[Brief description of the drawings]
FIG. 1 shows a perspective view of an exemplary electrical fuse ignition connector for the present invention.
FIG. 2 is a front view based on the viewpoint in the Z direction of FIG. 1;
FIG. 3 is a front view based on a viewpoint in a Y-axis direction.
FIG. 4 is a front view based on a viewpoint in the X-axis direction.
FIG. 5 is a side cross-sectional view when the connector of the present invention and a corresponding connector are fitted and connected.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fuse igniter connector 2 of this invention 2 ... Ferrite member accommodating part 3 ... Surface part 4 ... Rectangular convex part 5 ... Peripheral defining part 6 ... Elastic member 7 Engagement claw 8 Rectangular projection 9 Engagement projection 10 Locked surface 11 of corresponding connector Connection section 12 Conductive wire

Claims (4)

A pair of conductors, a ferrite member covering at least a part of the pair of conductors, a pair of conductors, and a connector body having an axial hole and holding the pair of conductors in the axial hole are housed. A connector for an electrical fuse ignition device, which is provided with an insulated housing, and is fitted and connected to a corresponding connector,
An elastic member provided so as to circumferentially cover a part of the outer surface of the insulating housing and forming a sealing portion with a corresponding connector; and a fitting connection with the corresponding connector on the outer surface of the insulating housing. And a locking projection for performing
The fuze ignition device according to claim 1, wherein an interval between regions of the sealing portion that can seal an area contacting the corresponding connector is larger than an interval between the locking projection and a locked portion of the corresponding connector. Connector. The electrical fuse ignition device connector according to claim 1, wherein a fitting connection between the electrical fuse ignition device connector and a corresponding connector is not removable. The electrical fuse ignition device connector according to claim 1, which is manufactured by an overmolding method. 4. A projection according to claim 1, wherein a projection is formed on at least a part of an outer surface of the insulating housing such that the sealing portion is located between the locking projection and the fitting connection direction. 2. The connector for an electric fuse ignition device according to claim 1.

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