JPH0143644Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a vehicle speed detector that is installed near the axle of a vehicle and generates vehicle speed pulses, and in particular includes a drive shaft with a magnet installed inside the box, and a circuit board that supports the sensor and yoke. The present invention relates to a grommet and cord locking device for holding a cord of a vehicle speed detector provided with a grommet and a cord.

This type of grommet made of elastic rubber is attached to the tip of the cord and protects the cord from breaking at the point where the cord is inserted into the box. In this case, since the box is held only by the lid plate covering the box, there is a problem in that the strength is not sufficient to withstand the force in the direction in which the cord is pulled out.

The present invention was devised to solve this problem, and will be explained below based on the illustrated embodiments.

The vehicle speed detector of the present invention has a magnet 2 inside a box body 1.
The drive shaft 3 with the attached drive shaft 3, the circuit board 6 that supports the sensor 4 and the yoke 5, and the grommet 8 of the cord 7 connected to the circuit board 6 are attached to the box 1.
The grommet 8 is inserted into the notch groove 1a provided in the cord and is clamped by the cover plate 9 of the box body.
Flange pieces 8a and 8b are provided on the inner and outer walls of the box body 1 to clamp the mounting wall 13 of the box body, and the inner wall side collar pieces 8
a is formed into a substantially square shape and hangs downward, and is sandwiched between a holding plate 12 and a mounting wall 13 that are set up from the bottom of the box body 1, and a forked claw 12a provided at the tip of the holding plate 12 holds the cord 7. It is supported and held by caulking.

In the figure, 10 is a gasket for sealing the lid plate 9, which is formed in an annular shape on one side of the inner wall collar piece 8a of the grommet 8, and has an opening 1b for attaching the lid plate of the box body 1 on its inner surface.
A lip 10a is provided projecting to fit into the annular slit groove 1c formed in the slit groove 1c to completely seal the seal and prevent the packing 10 from coming off. The cover plate 9 is attached to the box body 1 by caulking the outer edge of the opening 1b of the box body 1. At this time, a presser claw 9a protruding downward from the end face of the cover plate 9 on the grommet attachment side is attached to the grommet collar piece 8a. , 8b to force the grommet 8 into the notch groove 1a. Reference numeral 11 indicates a guide groove formed in the body 1 for mounting the circuit board 6.

In this way, according to the present invention, the grommet 8
Since the flange piece 8a on the inner wall side formed in the above structure is sandwiched between the holding plate 12 and the mounting wall 13, the grommet does not easily come off against the force in the cord pulling direction. Because the cord is tightly held, the vehicle speed detector is placed under the severe conditions of being attached to the undercarriage of the vehicle, and has the advantage that it will not easily come off even if an unexpected force is applied to the cord.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a front sectional view showing a state in which a cord is attached. 1...Box body, 2...Magnet 3...Driveshaft, 4...Sensor, 5...Yoke, 6...
Circuit board, 7... Cord, 8... Grommet, 9
...Lid plate, 12...Press plate.

Claims (1)

[Scope of utility model registration request] A drive shaft 3 equipped with a magnet 2 and a circuit board 6 supporting a sensor 4 and a yoke 5 are provided in a box 1, and a grommet 8 for a cord 7 connected to the circuit board 6 is provided in the box 1. In the vehicle speed detector which is fitted into the notch groove 1a and held between the lid plate 9 of the box body, the grommet 8 is provided with collar pieces 8a and 8b that abut against the inner and outer walls of the box body 1,
The flange piece 8a on the inner wall side is sandwiched between a holding plate 12 and a mounting wall 13 that stand up from the bottom of the box body, and the cord is held by caulking with a bifurcated claw 12a provided at the tip of the holding plate 12. Vehicle speed detector code retention device.