JP4104968B2 - Connector for electric fuse igniter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical connector for an electric fuse igniter for operating an air bag.
[0002]
[Prior art]
[Patent Prior Literature]
Japanese Patent No. 3247932 and Japanese Patent Laid-Open No. 2000-294343.
The existence of an airbag as a device for protecting a passenger of an automobile is well known. This system, for example, protects the driver by instantaneously filling a bag accommodated by folding inside the handle portion in the event of a collision.
[0004]
Here, an explosive mixture is used to fill the airbag with gas. When an acceleration of more than a certain value is detected during a collision, the acceleration sensor transmits an electrical signal to the electric fuse igniter, and the electric fuse igniter ignites the explosive mixture, causing the mixture to explode and generating gas in the gas generator. Let
[0005]
In a typical example of an air bag system, a folding air bag, an explosive mixture, and an electric fuze igniter are accommodated near the handle shaft, and a sensor is disposed near the center of the vehicle body among the wirings connected to the electric system of the vehicle. The The wiring connected to the electric system connected from the battery via the sensor passes through the steering column and is connected by a connector near the center of the handle to the electric fuse igniter.
[0006]
Japanese Patent No. 3247932 relates to an ignition tube connector in an airbag system. The invention disclosed in the publication has a problem with the prior art in which the wire connection portion of the electrical contact is positioned by the two holes of the ferrite bead and the ferrite bead is fixed to the insulating housing by the insert mold, that is, injection at the time of insert molding The positional displacement of the ferrite bead with respect to the insulating housing due to pressure or the positional displacement of the electrical contact within the two holes of the ferrite bead does not accurately position the electrical contact with respect to the insulating housing. This solves the problem that the contact cannot be fitted and connected. In order to solve this problem, the invention provides an ignition tube connector capable of accurately positioning an electrical contact with respect to an insulating housing and accurately and appropriately fitting and connecting a pin terminal of the ignition tube to the electrical contact. .
[0007]
The invention disclosed in Japanese Patent Application Laid-Open No. 2000-294343 relates to an electric fuze igniter in an air bag system, and the air bag must operate reliably in an emergency, but operates normally. Focusing on the problem that even if there is a connection error in the connector, there is a possibility that it will not be detected normally, and the conventional technology that considers the wiring work by color coding of the conductive wire protruding from the ignition device toward the connector It is intended to provide a connector for an electric fuse igniter that can completely eliminate the possibility of a connection mistake compared to the above.
[0008]
[Problems to be solved by the invention]
Here, in any of the ignition devices described in the above cited references, from the viewpoint of preventing malfunctions so that the airbag does not operate except in an emergency, the connector connection portion is used as a countermeasure against the induced current to the wiring leading to the ignition device. Measures such as attaching ferrite are taken. However, neither of the cited references describes protection measures against water drops that may cause an electrical short circuit in the connector and may enter from the outside or dew drops generated from a temperature difference in the vehicle. Therefore, it is required to provide a connector that can be fitted and connected with higher sealing performance than the prior art from the viewpoint of the protective measures that cause this problem.
[0009]
[Means for Solving the Invention]
In order to solve the above problems, in the present invention, the connector itself is provided by providing a seal member (elastic member) on the outer surface of the connector housing of the present application in order to ensure the waterproofness of the fitting connection portion with the corresponding connector. And found to achieve a complete waterproof function of the mating connection.
[0010]
According to an embodiment of the present invention, an electrical fuse igniter connector according to the present invention includes a pair of conductors, a ferrite member that covers at least a part of the pair of conductors, the pair of conductors, and an axial hole. A connector for an electric fuse igniter that includes an insulating housing that accommodates the connector body portion that holds the pair of conductors in the axial hole, and is fitted and connected to the pair of connectors, the insulating housing An elastic member provided so as to cover a part of the outer surface of the body in a circumferential shape and forming a sealing portion with the corresponding connector, and for fitting and connecting with the corresponding connector on the outer surface of the insulating housing The interval of the region of the sealing portion that has a locking projection and can seal the region in contact with the corresponding connector is larger than the interval between the locking projection and the corresponding locked portion of the connector. It is large.
[0011]
The elastic member forming the sealing portion arranged in the connector of the present invention can be elastically and liquid-tightly sealed at the contact portion with the corresponding connector at the time of fitting connection with 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 from each other 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 interval in the fitting direction than the interval between the locking protrusion and the engaged portion of the corresponding connector. . Therefore, even if the locking projection of the connector of the present application moves the gap (playing part) with the engaged part of the corresponding connector, the elastic member forming the sealing part always has the corresponding connector and contact part. Since it has, the contact part of the said connectors can be liquid-tightly sealed reliably, and a perfect waterproof function is implement | achieved.
[0012]
According to another embodiment of the present invention, in the electrical fuse igniter connector according to the present invention, the fitting connection is not removable.
[0013]
For example, if the connector of the present application has a complete pull-out prevention function, that is, a fitting function only in one direction by fitting, at the time of mating connection with the corresponding connector, occurrence of connection release due to impact of the connector or the like Can be prevented.
[0014]
According to still another embodiment of the present invention, the connector for an electric fuse igniter according to the present invention is manufactured by an overmold method.
[0015]
For example, if the connector itself of the present application is molded by the overmolding method, the waterproof function of the connector itself is also complete, and the waterproof property of the connector itself and the waterproof property of the fitting contact portion with the corresponding connector are ensured. Complete waterproof function.
[0016]
According to still another embodiment of the present invention, the connector for an electric fuze igniter according to the present invention is provided on at least a part of the outer surface portion of the insulating housing with the locking projection portion with respect to the fitting connection direction. A convex portion is defined so that the sealing portion is located therebetween.
[0017]
For example, in the outer surface portion of the insulating housing, if a convex portion is defined at a position facing the locking projection portion via an elastic member that forms a sealing portion that surrounds the outer surface of the insulating housing, the elastic member is During fitting, even if a pressing force is applied in the direction opposite to the connection direction from the contact portion of the corresponding connector, the protrusion 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 connector has a pair of conductors 12, a ferrite member that covers at least a part of the pair of conductors 12, the pair of conductors 12, a Y-axis direction hole, and the pair of conductors 12 in the Y-axis direction hole. Insulating housing (in which the internal structure is omitted) that accommodates the connector body for holding the lead wire 12 is provided, 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 entering the inside. At the rear end of the cylindrical portion of the connector having a circular connecting section 11 extending in the X-axis direction (insertion direction) perpendicular to the Y-axis, a substantially semicircle projecting in the Y-axis direction from the ferrite member housing portion 2 A rectangular convex portion 4 extending in the X-axis direction is defined on the surface 3 of the shape portion. Further, a circumferential defining portion 5 which is flush with the top surface and orthogonal to the major axis direction (X direction) of the rectangular convex portion 4 is drawn from the surface 3. The O-shaped elastic member 6 includes a wall portion of the defining portion 5 and a rectangular convex portion that is defined to face the rectangular convex portion 4 via the defining portion 5 and the elastic member 6 in the X-axis direction. Between the eight wall portions, they are arranged and fixed so as to form a sealing portion with a corresponding connector. The engaging claws 7 that form the engaging portions with the corresponding connectors extend so as to increase the peripheral diameter while being separated from the surface portion 3 in the elastic member direction. A protruding portion 9 having a surface perpendicular to the surface portion 3 is provided at the tip of the engaging claw 7. The surface of the protruding portion 9 perpendicular to the surface portion 3 comes into contact with and is locked with the locked surface 10 with the corresponding connector (see FIG. 5). Inside the connection cross section 11, a recess is formed for receiving the defining portion protruding from the corresponding connector together with the conductive portion, and an electrical connection is realized at the time of fitting connection.
[0019]
In order to understand the connector for an electric fuse igniter of the present invention, shapes based on various viewpoints are shown in FIGS. 2 to 4 together with the following brief descriptions. 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 number is attached | subjected to the same location.
[0020]
FIG. 5 is a side cross-sectional view when the connector for an electric fuse igniter of the present invention and a corresponding connector are fitted and connected. As shown in the figure, the movable distance of the contact point in the insertion direction of the corresponding connector with the elastic member 6 forming the sealing portion is indicated by a, and the relationship between the top surface of the engagement protrusion 9 and the corresponding connector is indicated. An interval (play) with the mating surface is indicated by b. Here, since the distance a is larger than the distance b, even if the connector of the present application is moved by the distance b within the corresponding connector, the elastic member 6 always forms a sealing portion at the contact portion with the corresponding connector. . Therefore, a complete waterproof function can be realized.
[0021]
【effect】
The connector for the electric fuse igniter of the present application is manufactured by an overmolding method, and the waterproofness of the connector itself is larger than the interval of play with the locking portion when the connector is fitted and connected to the corresponding connector. Since it is wide, the fitting connection part is always sealed in a liquid-tight manner, that is, the fitting connection part has a waterproof property, and the waterproof property is ensured to achieve a complete waterproof function.
[Brief description of the drawings]
FIG. 1 shows a perspective view of an exemplary connector for an electric fuze igniter according to the present invention.
FIG. 2 is a front view based on the viewpoint in the Z direction of FIG.
FIG. 3 is a front view based on a viewpoint in the 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 the corresponding connector are fitted and connected.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Connector for electric fuse igniter of this invention 2 ... Housing part 3 of ferrite member ... Surface part 4 ... Rectangular convex part 5 ... Circumferential defining part 6 ... Elastic member 7 ... engagement claw 8 ... rectangular protrusion 9 ... engagement projection 10 ... corresponding locked surface 11 of connector ... connection cross section 12 ... lead wire

Claims (1)

A pair of conductors;
A ferrite member covering at least a part of the pair of conductive wires;
And the pair of conductors, and has an axial bore of said pair of conductors accommodate the connector body portion for holding said pair of conductors in the axial direction of the bore, over-molding method the insulating casing manufactured by and,
A connector for an electric fuse igniter that is detachably fitted and connected inside a corresponding connector,
The electrical fuse igniter connector is:
An elastic member forming the provided so as to cover a portion of the outer surface of the insulating casing circumferentially sealing portion in contact with the corresponding connector,
A locking projection extending in the widening direction from the outer surface so as to be locked with the locked surface of the corresponding connector in order to detachably fit and connect inside the corresponding connector ;
A defining portion protruding radially from the surface of the insulating housing at a predetermined interval in the opposite direction to the fitting connection direction of the connector from the end of the locking projection;
Have
The connector for the electric fuse igniter has a position where a tip portion thereof abuts against a bottom surface of the corresponding connector in the fitting connection direction, and the locked surface in a direction opposite to the fitting connection direction. Can move between the position where
The elastic member is positioned within the predetermined distance,
Since the region of the sealing portion where the elastic member and the corresponding connector can contact is larger than the movement interval of the electric fuse igniter connector, the elastic member even if the electric fuse igniter connector moves. Is a connector for an electric fuse igniter characterized by always forming a sealing part .

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