JPS641606Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to the structure of a tilt sensor, and more specifically, in a device that detects the tilt of a vehicle body such as an automobile using a light emitting element and an optical fiber, each of a light transmitting plate, a shielding plate, and a light receiving plate is used. The present invention relates to a structure of an inclination sensor characterized in that a repelling magnet plate is disposed to smoothly pivot a shielding plate.

In the above-mentioned tilt sensor, a shielding plate having a shielding part is pivotally supported between a light transmitting plate to which a light emitting element is attached and a light receiving plate to which an optical fiber is attached, and the inclination of the shielding plate is adjusted according to the inclination of the vehicle body. The structure is such that the amount of inclination of the vehicle body is detected by increasing or decreasing the amount of light received by an optical fiber attached to a light receiving plate.

The accuracy of these tilt sensors depends on whether the shielding plate tilts smoothly in accordance with the tilt of the vehicle body.

The structure of the inclination sensor of the present invention is intended to provide a structure in which the shielding plate smoothly pivots and tilts in accordance with the inclination of the vehicle body.
Magnet plates are arranged facing each light receiving plate, and the magnetic repulsion between the magnetic plates causes the shielding plate itself to always pivot in a direction perpendicular to the axis. The general idea is that the shielding plate does not come into contact with the light transmitting plate and the light receiving plate, but slides according to the inclination of the vehicle body, and can increase or decrease the light emitted from the light emitting elements.

Hereinafter, the structure of the tilt sensor of the present invention will be described in detail based on the drawings.

FIG. 1 is an exploded perspective view of a tilt sensor device according to the present invention.

1 is a light transmitting plate, and this light transmitting plate has an upper piece 11 and a lower piece 1.
It has a substantially U-shaped cross section with a vertical piece 13 between it and 2.

A locking piece 11a is erected at the center of the outer end of the upper piece 11, and a locking hole 11b is provided in the locking piece 11a. A shaft hole 13a is bored on the inner surface of the upright piece 13 near the upper piece 11 for pivotally supporting the shielding plate with the light receiving plate, as will be described later. Also standing piece 13
A pair of stopper mounting portions 13 are located approximately in the center of the inner surface of the
b, 13b are provided, and elastic stoppers 13c, 13c made of a rubber material, urethane material, etc. are fitted into the stopper mounting portions. Also standing piece 1
A magnet plate A is attached to the inner surface of 3 near the lower piece 12. As will be described later, this magnetic plate A has the same magnetic properties as the magnetic plate of the shielding plate, so that the magnetic plate of the shielding plate and the magnetic plate A magnetically repel each other.
Further, a light emitting element mounting portion 13d is provided on the outer surface of the vertical piece 13 closer to the lower piece 12, and light emitting element mounting holes 13e, 13e are provided in this light emitting element mounting portion 13d so as to pass through the vertical piece 13.

The shielding plate 2 is substantially triangular in shape, and has an axial hole 21 drilled in its upper portion, i.e., in the vicinity of the apex. On the other hand, a shielding plate 22 is extended from the lower portion, i.e., the base, of the shielding plate 2, and a cutout portion 2 is formed in the shielding piece.
3 is configured.

Furthermore, the magnetic plate B is fitted into the shielding plate 2 as well. One surface of this magnet plate B faces the above-mentioned magnet plate A, and the other face faces a magnet plate C, which will be described later. In addition, a light transmitting plate 1 is provided on the side of the shielding plate 2.
Contact portions 24, 24 are integrally provided to contact elastic stoppers 13c, 13c provided in the. In order to make the pivoting sensitivity of the shielding plate 2 more sensitive, recesses 25 etc. are provided to make the entire plate thinner, and
The position where the magnet plate B is fitted should also be as low as possible.

3 is a light receiving plate with a locking piece 31 erected on the upper piece;
A locking hole 31a is bored approximately in the center of this locking piece 31. Further, below the locking piece 31 is a shaft hole 32.
is drilled. Furthermore, stopper receiving portions 33, 33 are provided approximately at the center of the light receiving plate 3, corresponding to the elastic stoppers 13c, 13c of the light transmitting plate 1.
Furthermore, the magnet plate C is shaped to correspond to the magnet A of the light transmitting plate 1.
is attached.

This magnetic plate C has a polarity that repels the magnetic plate B fitted into the shielding plate 2.

Furthermore, an optical fiber holder 34 is provided below the magnet plate C, and is approximately at the same height as the light emitting element mounting portion 13d of the light transmitting plate 1. In the light transmitting plate 1, shielding plate 2, and light receiving plate 3 arranged in this way, the pivot 24 is inserted into each shaft hole 13a, 21, 32, and the shielding plate 2 is pivoted between the light transmitting plate 1 and the light receiving plate 3. It is pivoted to a state where it can move.

Moreover, elastic stoppers 13c, 13c are provided between the light transmitting plate 1 and the light receiving plate 3 in order to prevent the shielding plate 2, which pivots about the pivot 4, from wobbling more than necessary.

As a result, the contact portions 24, 24 of the shielding plate 2 come into contact with the elastic stoppers 13c, 13c.

Reference numeral 5 designates an exterior case in which the light transmitting plate 1, shielding plate 2, and light receiving plate 3 described above are combined by a pivot 4 and housed. Furthermore, a part of the exterior case 5 contains an electric circuit including a phototransistor, a resistor, a capacitor, a Zener diode, etc., for electrically converting the light received from the optical fiber. Further, a locking piece 51 is provided upright at the upper end of the exterior case 5, and a locking hole 5 is formed approximately in the center of the locking piece 51.
1a is drilled. Therefore, the locking piece 11a of the light transmitting plate 1, the locking piece 31 of the light receiving plate 3, and the outer case 5
The locking pieces 51 of the locking holes 11 are overlapped with each other.
b, 31a, and 51a are communicated with each other and can be locked with screws or the like.

FIG. 2 is a front view of the shielding plate.

In other words, a thin plate-like shielding piece 22 is extended from the bottom of the substantially triangular plate-like shape, and a notch 23 is provided by cutting out the shielding piece 22.

FIG. 3 is a side sectional view showing a state in which the light transmitting plate 1, shielding plate 2, and light receiving plate 3 configured as described above are housed in the outer case 5. As can be seen from this sectional view, a pivot 4 is provided between the light transmitting plate 1 and the light receiving plate 3, and the shielding plate 2 is pivotally supported on this pivot 4. Moreover, the shielding plate 2 has elastic stoppers 13c and 13c installed between the light transmitting plate 1 and the light receiving plate 3.
The structure is such that the deflection beyond the maximum width is limited by this.

On the other hand, the magnetic plate B of the shielding plate 2 is disposed such that its surfaces face the magnetic plate A of the light transmitting plate 1 and the magnetic plate C of the light receiving plate 3, respectively, and are magnetically repelled. That is, as shown in FIG. 4, if the magnetism of the shielding plate 2 side of the magnet plate A of the light transmitting plate 1 is N, then the magnetism of one surface (light transmitting plate 1 side) of the magnet plate B fitted in the shielding plate 2 is N.
shall be.

At this time, let S be the magnetism of the shielding plate 2 side of the magnet plate C attached to the light receiving plate 3. As a result, the magnet plates A and B become magnetically repulsive, so that the shielding plate 2 does not come into contact with the light transmitting plate 1. Similarly, since the magnet plates B and C are also in a magnetically repulsive state, the shielding plate 2 and the light receiving plate 3 do not come into contact with each other.

As described above, according to the structure of the inclination sensor of the present invention, the shielding plate 2 does not come into contact with the light transmitting plate 1 and the light receiving plate 3 no matter how the vehicle body to which it is attached tilts. The slope will adapt to the slope. In other words, the shielding piece 22 sensitively blocks the amount of light emitted from the light emitting element, and the optical fiber senses the amount of received light and electrically converts the increase or decrease in the amount of received light to perform a tilt sensor function. I can do it.

Therefore, in a tilt sensor in which a shielding plate is pivotally supported between a light-transmitting plate and a light-receiving plate, magnets having repelling properties are disposed facing each of the light-transmitting plate, shielding plate, and light-receiving plate. The structure of the inclination sensor of the present invention, which is characterized by the following, has an extremely simple structure and is capable of sensitively sensing the inclination angle of a vehicle body, etc.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a sensor device using the structure of the tilt sensor according to the present invention, FIG. 2 is a front view illustrating the shielding plate, and FIG. 3 is the structure of the tilt sensor according to the present invention. FIG. 4, a side sectional view of the sensor device used, is a partially omitted sectional view illustrating the repulsion relationship between magnet plates disposed opposite to each other. 1... Light transmitting plate, 13c... Stopper, 2...
Shielding plate, 24... Contact portion, 3... Light receiving plate, 33...
...Stopper receiving part, 4...Pivot, 5...Exterior case, A...Magnetic plate of light transmitting plate, B...Magnetic plate of shielding plate, C...Magnetic plate of light receiving plate.

Claims (1)

[Claims for Utility Model Registration] An inclination sensor that pivots the upper part of a shielding plate between a light transmitting plate and a light receiving plate, and detects an increase or decrease in the amount of light received by pivoting the shielding plate, wherein the shielding plate is It has a thin triangular plate shape, and a magnet plate is fitted into the lower part of the plate, and each side of the magnet plate is made to face each of the magnet plates attached to the light transmitting plate and the light receiving plate, and the shielding plate is A structure of a tilt sensor, characterized in that a magnet plate, a magnet plate of the light transmitting plate, and a magnet plate of the light receiving plate are respectively disposed in a magnetically repulsive state.