JP3620825B2 - Satellite sensor wire harness wiring structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a satellite sensor that is disposed in a crash zone at the front of a vehicle and detects a vehicle collision, and an occupant protection device such as an airbag device that is disposed in a vehicle interior by a signal from the satellite sensor. It is related with the wiring structure of the wire harness used in order to connect a control apparatus.
[0002]
[Prior art]
For example, as shown in Japanese Patent Application Laid-Open No. 10-152014, when connecting a control device arranged in a vehicle interior and a satellite sensor arranged in a crash zone at the front of the vehicle with a wire harness, Generally, a wire harness main line connected to the control device and a wire harness branch line branched from the wire harness main line and connected to a satellite sensor are used.
[0003]
[Problems to be solved by the invention]
By the way, the routes such as the wire harness trunk line and the wire harness branch line are normally routed so as to be the shortest after satisfying various conditions, and the wire harness trunk line is fixed to the body. On the other hand, when the wire harness main line moves greatly to the rear of the vehicle, the wire harness branch may be broken.
[0004]
[Means for Solving the Problems]
The present invention has been made to address the above-described problems, and a wire harness that connects a control device disposed in a vehicle interior and a satellite sensor disposed in a crash zone in the front of the vehicle to the control device. In a wire harness wiring structure of a satellite sensor that is branched from a trunk line and a wire harness branch line that is branched from the wire harness trunk line and connected to the satellite sensor, the wire harness trunk line is connected to the satellite sensor at the time of a vehicle collision. In contrast, the wire harness branch line is provided with a surplus length part that can extend between the wire harness main line and the branch part of the wire harness branch line to the satellite sensor when moving largely rearward of the vehicle. (Invention 1). In this case, it is desirable that the extra length portion be disposed along the wire harness trunk line (the invention according to claim 2).
[0005]
Further, a control device disposed in the vehicle interior and a satellite sensor disposed in the crash zone at the front of the vehicle are connected to the satellite sensor by branching from the wire harness main line connected to the control device and the wire harness main line. In the wire harness routing structure of the satellite sensor formed by connecting the wire harness branch lines, the branch position of the wire harness branch line from the wire harness trunk line is set at a vehicle front position relative to the satellite sensor , and the vehicle When the wire harness main line largely moves backward with respect to the satellite sensor at the time of a collision, the branch position moves from the vehicle front position to the vehicle rear position with respect to the satellite sensor. This invention is characterized.
[0006]
[Operation and effect of the invention]
In the wire harness wiring structure according to the present invention (the invention according to claim 1), even if the wire harness main line moves greatly to the rear of the vehicle with respect to the satellite sensor due to the deformation of the body at the time of collision, The surplus portion provided extends to prevent the wire harness branch line from being disconnected. Also, if the amount of backward movement of the wire harness trunk line is longer than the value expected in advance and the extension of the extra length of the wire harness branch cannot prevent the wire harness branch from being disconnected, the extension of the extra length is also achieved. Can sufficiently secure the time from the start of the collision to the disconnection of the wire harness branch line, so that the signal detected by the satellite sensor before the disconnection of the wire harness branch line is accurately transmitted to the control device. It is possible to operate the control device normally.
[0007]
Further, in the case of implementing the present invention, when the extra length of the wire harness branch is arranged along the main wire harness (invention according to claim 2), the extra length of the wire harness branch is routed. Therefore, the wire harness branch line can be easily routed.
[0008]
Further, in the wire harness wiring structure according to the present invention (the invention according to claim 3), even if the wire harness main line greatly moves backward with respect to the satellite sensor due to deformation of the body at the time of collision, the wire harness branch The branch position of the wire from the wire harness trunk line moves from the vehicle front position to the vehicle rear position from the satellite sensor, and the entire wire harness branch line moves to the rear of the vehicle along with this, thereby breaking the wire harness branch line. While being able to prevent, sufficient time can be ensured from the start of the collision to the disconnection of the wire harness branch line. In addition, the present invention can be implemented with a shorter wire harness branch length than the above inventions, and can be implemented at low cost.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of a wire harness wiring structure according to the present invention. In this embodiment, a control device 10 disposed in a vehicle interior and left and right disposed in a crash zone in the front of the vehicle. A pair of satellite sensors 20R, 20L are branched from the pair of left and right wire harness trunks 30R, 30L connected to the control device 10, and connected to the satellite sensors 20R, 20L. The wire harness branches 32R and 32L are connected.
[0010]
The control device 10 disposed in the passenger compartment is a device that controls the activation of the pair of left and right airbag devices, and is a floor that is assembled to the floor and that measures and outputs a deceleration applied in the longitudinal direction of the vehicle as needed. It incorporates a sensor (not shown) and an electric control circuit (not shown) including a microcomputer. The electric control circuit is also connected to each squib 40R, 40L of each airbag device and a pair of left and right seat belt mounting presence / absence detection sensors 50R, 50L. In the electric control circuit, when it is determined that the airbag needs to be activated based on a signal from each sensor (satellite sensor, floor sensor, seat belt wearing presence / absence detection sensor, etc.), each squib 40R, 40L of each airbag device is determined. Is energized, and the gas generating agent is ignited.
[0011]
Each of the satellite sensors 20R and 20L is a sensor that outputs an ON signal when an internal switch is turned on when a deceleration greater than a set value is applied to the vehicle. The satellite sensor 20R on the right side in FIG. 2 is taken as an example. As shown, it is assembled to a body (for example, a side member) 60 via a bracket 61 that holds the mounting posture in a crash zone at the front of the vehicle. The satellite sensors 20R and 20L are also applicable to so-called electronic sensors (acceleration sensors) that measure and output deceleration applied in the longitudinal direction of the vehicle as needed.
[0012]
Each wire harness main line 30R, 30L is obtained by sequentially bundling each wire harness branch line 32R and body earth line 38 as shown by way of example of the right wire harness main line 30R in FIG. , 72 and the like are integrally fixed to the body 60. Each wire harness branch shown in FIG. 2 includes a wire harness branch 31 connected to a washer tank (not shown) via a connector, a wire harness branch 32R connected to the satellite sensor 20R via a connector, not shown. A wire harness branch line 33R connected to the clearance of the headlight via a connector, a wire harness branch line 34R connected to a headlamp (not shown) via a connector, and a wire connected to a headlight leveling (not shown) via a connector. A harness branch line 35R, a wire harness branch line 36 connected to an ABS actuator (not shown) via a connector, a wire harness branch line 37 connected to an ABS speed sensor (not shown) via a connector, and the like.
[0013]
By the way, in this embodiment, as shown in FIG. 2, the surplus length part S is provided in the wire harness branch 32R connected to the satellite sensor 20R via the connector. The surplus length portion S is set in advance in consideration of the rearward movement amount of the wire harness main line 30R at the time of the collision, and extends between the branch portion A of the wire harness main line 30R and the wire harness branch line 32R to the satellite sensor 20R. Is possible. Further, the surplus length portion S is disposed along the wire harness main line 30R and is fixed to the wire harness main line 30R by a tape B that can be easily detached.
[0014]
In the wire harness routing structure of the present embodiment configured as described above, the wire harness main line 30R is behind the vehicle with respect to the satellite sensor 20R as shown by the phantom line in FIG. increase moved even, elongated portion S provided on the wire harness branch line 32R is extended as shown in phantom lines in FIG. 3 to prevent disconnection of the wire harness branch line 32R.
[0015]
Further, even if the rearward movement amount of the wire harness trunk line 30R is longer than the value expected in advance and the extension of the extra length portion S in the wire harness branch line 32R cannot prevent the wire harness branch line 32R from being disconnected. Since the extension of the long portion S can sufficiently secure the time from the start of the collision to the disconnection of the wire harness branch 32R, the on-state detected by the satellite sensor 20R until the disconnection of the wire harness branch 32R is reached. The signal can be accurately transmitted to the control device 10, and the control device 10 can be operated normally.
[0016]
Further, in the present embodiment, as shown in FIG. 2, the extra length portion S of the wire harness branch line 32R is disposed along the wire harness main line 30R. The long portion S does not get in the way, and the wiring work of the wire harness branch 32R can be easily performed. In addition, since the surplus length portion S of the wire harness branch 32R is fixed to the wire harness main line 30R with the tape B that can be easily detached, the surplus length portion S does not hit the body 60 when the vehicle travels, and the generation of abnormal noise is prevented. can do.
[0017]
In the above embodiment, as shown in FIGS. 2 and 3, the extra length portion S that can extend between the branch portion A of the wire harness trunk line 30R and the wire harness branch line 32R to the satellite sensor 20R is wired. Although provided to the harness branch line 32R to prevent the wire harness branch line 32R from being disconnected at the time of a collision, the wire harness branch line 32R of the wire harness branch line 32R is separated from the wire harness trunk line 30R as in the other embodiment shown in FIG. It is also possible to carry out by setting the position (branch position) of the branch part A to a position ahead of the vehicle from the satellite sensor 20R.
[0018]
In the embodiment shown in FIG. 4, even if the wire harness main line 30 </ b> R largely moves rearward of the satellite sensor 20 </ b> R with respect to the satellite sensor 20 </ b> R as indicated by the phantom line due to the deformation of the body 60 at the time of collision, When the branch position (A) of the wire 32R from the wire harness main line 30R moves from the vehicle front position to the vehicle rear position with respect to the satellite sensor 20R, the wire harness branch line 32R moves to the vehicle rear accordingly. The disconnection of the wire harness branch 32R can be prevented, and a sufficient time from the start of the collision to the disconnection of the wire harness branch 32R can be secured. In addition, as compared with the above-described embodiment, the length of the wire harness branch line 32R can be reduced, and the cost can be reduced.
[0019]
In each of the above-described embodiments, the present invention is implemented in the embodiment in which the satellite sensors are disposed in a pair of left and right in the crash zone in the front portion of the vehicle. For example, a single satellite sensor is disposed in the crash zone in the center of the vehicle front portion. The present invention can also be carried out in the same way, and is not limited to the above embodiment.
[Brief description of the drawings]
FIG. 1 is a plan view schematically showing an embodiment of an airbag device employing a satellite sensor wire harness wiring structure according to the present invention.
FIG. 2 is an enlarged perspective view of a right front apron portion of the embodiment shown in FIG.
FIG. 3 is a diagram illustrating the configuration and operation of the main part shown in FIG. 2;
FIG. 4 is a diagram illustrating the configuration and operation of the main part corresponding to FIG. 2 in another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Control apparatus, 20R, 20L ... Satellite sensor, 30R, 30L ... Wire harness trunk line, 32R, 32L ... Wire harness branch line connected to satellite sensor, S ... Extra length part provided in wire harness branch line, A ... Wire A branch portion of the harness branch line from the wire harness main line, 60.

Claims (3)

A control device disposed in the vehicle interior and a satellite sensor disposed in the crash zone at the front of the vehicle are connected to the satellite sensor branched from the wire harness main line connected to the control device and the wire harness main line. In a wire harness wiring structure of a satellite sensor connected by a wire harness branch line, when the wire harness trunk line greatly moves to the rear of the vehicle with respect to the satellite sensor at the time of a vehicle collision, the wire harness trunk line and the wire harness A wire harness wiring structure for a satellite sensor, wherein a surplus length portion that can extend between the branch portion of the branch wire and the satellite sensor is provided in the wire harness branch wire. The wire harness routing structure for a satellite sensor according to claim 1, wherein the extra length portion is disposed along the wire harness trunk line. A control device disposed in the vehicle interior and a satellite sensor disposed in the crash zone at the front of the vehicle are connected to the satellite sensor branched from the wire harness main line connected to the control device and the wire harness main line. In the wire harness wiring structure of the satellite sensor connected by the wire harness branch line, the branch position of the wire harness branch line from the wire harness main line is set at a vehicle front position with respect to the satellite sensor, and a vehicle collision A satellite sensor characterized in that when the wire harness main line sometimes moves largely rearward of the satellite sensor relative to the satellite sensor, the branch position moves from the vehicle forward position to the vehicle rearward position rather than the satellite sensor. Wire harness wiring structure.

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