JPH05254446A - Mounting structure for sensor board of steering angle sensor - Google Patents

Abstract

PURPOSE:To provide parts for common use and also to prevent occurrence of any trouble due to the assembly tolerance of a steering handle by separating the sensor board.of a steering angle sensor away from a steering operation transmission body, such as a cancel cam, and resiliently fitting the sensor board in the base of a combination switch device, etc. CONSTITUTION:A resilient fit-in part 12 is arranged on the outer periphery of a cylinder part 11 in which the steering shaft of a vehicle is fitted. The resilient fit-in part 12 supports a sensor board 2 of a steering angle sensor. The sensor board 2 is provided with an inner peripheral part 21 locked by the resilient fit-in part 12 and an engaging hole 22 with which a sensor engaging part 31 arranged to one end of a steering operation transmission body 3 is engaged. The steering operation transmission body 3 is provided at its other end with a handle engaging part 32 engaging. with a steering handle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved structure for mounting a sensor board of a steering angle sensor for detecting a steering angle of a steering wheel of a vehicle.

[0002]

2. Description of the Related Art Conventionally, a sensor board of this type of steering angle sensor has a mounting structure as shown in Japanese Utility Model Laid-Open No. 59-154666. That is, the sensor board having a large number of detection holes and having a constant interval over the entire circumference is integrally formed with the cancel cam.

[0003]

However, depending on the type of vehicle, there are vehicles that require a steering angle sensor and vehicles that do not require a steering angle sensor. If a steering angle sensor is required, a cancellation with a sensor board is required. When the cam is set and the rudder angle sensor is not required, it is necessary to set the cancel cam without the sensor board. That is, it is necessary to set at least two types of cancel cams, which leads to an increase in price and inconvenience in parts management.
Further, the cancel cam is provided with play in its axial direction for the purpose of engaging with the steering handle, and absorbs the dimensional tolerance. Therefore, the sensor board formed integrally with the cancel cam also moves in the axial direction together with the cancel cam. Therefore, there is a risk that the sensor board comes into contact with, for example, a photo interrupter which is a detection unit fixed to the main body of the combination switch device, which constitutes a steering angle sensor in combination with the sensor board. Further, if the gap between the sensor board and the photo interrupter that is the detection unit is widened in order to avoid the risk of the contact, there is a problem that the detection accuracy is lowered.

[0004]

In order to solve the above-mentioned problems, the present invention separates a sensor board from a steering operation transmitting body such as a cancel cam and elastically fits it to a base such as a combination switch device. That is, the present invention is
A sensor board mounting structure of a steering angle sensor, comprising: a sensor board that rotates with the steering of a steering wheel of the vehicle; And a base having an elastic fitting portion that loosely fits and supports the sensor board on the outer periphery of the tubular portion through which the steering shaft is inserted, and the sensor board having one end supported by the base is separably engaged. And a steering operation transmission body having the other end engaged with a steering handle, and a mounting structure for a sensor board of a steering angle sensor.

[0005]

[First Embodiment] A first embodiment will be described with reference to FIGS. In the figure, reference numeral 1 is a base, which is, for example, a combination switch device. Further, 11 is a tubular portion,
Reference numeral 2 is a sensor board, and 3 is a steering motion transmitter, for example, a cancel cam. The tubular portion 11 is formed integrally with the base 1 and is used to insert a steering shaft (not shown) of a vehicle. The cylindrical portion 11 has an elastic fitting portion 12 for loosely fitting and supporting the sensor board 2 on the outer periphery, and a protrusion 13 for preventing the steering operation transmitting body 3 from falling off. Further, on the outer periphery of the elastic fitting portion 12, there is a step portion 14 that cooperates with the elastic fitting portion 12 to support the sensor board 2. The elastic fitting portion 12 has a structure that can be elastically deformed in the diameter direction of the tubular portion 11 by the slit 12a.

The sensor board 2 is formed by press-molding a metal plate and is coated with black. As shown in FIG. 2, the sensor board 2 has an inner peripheral portion 21 which is locked to the elastic fitting portion 12, and a steering operation transmission. Engagement hole 22 with which the sensor engagement portion 31 of the body 3 is engaged
And a slit 23 for connecting and disconnecting the beam between the light emitting and receiving elements (not shown) of the photo interrupter, which is the detection unit 4, according to the rotation of the sensor board 2. The detection unit 4 is fixed to the base 1, and the detection unit 4 and the sensor board 2 are fixed.
And form a rudder angle sensor.

Further, the steering operation transmitting body 3 is a resin molded product and has a sensor engaging portion 31 which engages with the sensor board 2.
At one end and a handle engaging portion 32 for engaging with a steering handle (not shown) of the vehicle at the other end.
Reference numeral 5 is a compression spring, which elastically presses the steering operation transmitting body 3 toward the steering handle.

As a procedure for assembling the above-mentioned respective components, first, the sensor board 2 is mounted on the elastic fitting portion 12, and then the sensor engaging portion 31 of the steering motion transmitting body 3 is attached to the engaging hole 22 of the sensor board 2. The steering operation transmitting body 3 is attached to the tubular portion 11 while being aligned with. At that time, the compression spring 5 may be attached to the tubular portion 11 either before or after the sensor board 2 is attached.

The sensor board 2 which has completed the above-mentioned assembly is
Although the cylindrical portion 11 can freely rotate in the circumferential direction, its movement in the axial direction is restricted by the elastic fitting portion 12 and the step portion 14. Then, the steering operation transmitting body 3 reliably transmits the steering operation of the steering handle to the sensor board 2 via the sensor engagement portion 31 engaged with the engagement hole 22 of the sensor board 2. However, the sensor engaging portion 31 of the steering operation transmitting body 3 is freely engaged with the engaging hole 22 of the sensor board 2 in the axial direction of the steering operation transmitting body 3, and the steering operation is performed due to the assembly tolerance of the steering wheel. Motion transmitter 3
The sensor board 2 will not be affected even if the position of A fluctuates in the axial direction.

[0010]

[Second Embodiment] FIGS. 3 and 4 show a second embodiment. In the figure, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
In the second embodiment, the sensor board 6 is provided with an engaging projection 62 with good visibility in order to facilitate the alignment when the steering operation transmitting body 7 is engaged with the sensor board 6.

First, the sensor board 6 has a slit 63 and an inner peripheral portion 61 and an engaging projection 62 are integrally formed. The steering operation transmission body 7 has a sensor engagement portion 71 that engages with the engagement protrusion 62 of the sensor board 6 and a handle engagement portion 72 that engages with the steering handle. The sensor board 6 is made up of different members. For example, it may be formed by insert molding, outsert molding or the like by providing a locking piece between the elastic fitting portion 12 and the step portion 14. The assembly procedure and operation of the second embodiment are as follows.
Since it is the same as that shown in the first embodiment, its explanation is omitted.

[0012]

Other Embodiments The present invention is not limited to the above-mentioned embodiments and includes various embodiments. For example, the elastic fitting portion may have a simple groove or an uneven shape formed on the outer circumference of the cylindrical portion, and may instead have a shape capable of elastically deforming the inner peripheral portion of the sensor board in the diametrical direction.

[0013]

As described above, according to the present invention, the sensor board is separated from the steering operation transmitting body such as the cancel cam so that it can be elastically fitted to the base of the combination switch device or the like as required. A common cancel cam can be used regardless of whether the rudder angle sensor needs to be mounted or not depending on the model, and sharing of parts can contribute to price reductions and It has the effect of making it easier to manage. In addition, even if the steering operation transmitting body is displaced in the axial direction due to the mounting tolerance of the steering wheel, the sensor board does not move in the axial direction. There is no danger to Furthermore, the gap between the sensor board and the detection section can be made as narrow as possible, and the desired detection accuracy can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the sensor board shown in FIG.

FIG. 3 is a vertical cross-sectional view showing a second embodiment of the present invention.

FIG. 4 is a perspective view of the sensor board shown in FIG.

[Explanation of symbols]

 1 Base 2,6 Sensor Board 3,7 Steering Motion Transmitter 4 Detecting Part 11 Cylindrical Part 12 Elastic Fitting Part 21,61 Inner Circumferential Part 22 Engaging Hole 31,71 Sensor Engaging Part 62 Engaging Protrusion

Claims (1)

[Claims] 1. A structure for mounting the sensor board of a steering angle sensor, comprising: a sensor board that rotates with the steering of a steering wheel of a vehicle; and a detection section that derives a signal with the rotation of the sensor board. A base having a tubular portion through which a steering shaft of a vehicle is inserted and an elastic fitting portion for loosely supporting the sensor board on the outer periphery of the tubular portion, and a sensor board having one end supported by the base. A steering board for a steering angle sensor, comprising: a steering motion transmitting body that is separably engaged and the other end is engaged with a steering handle.