JPH0439062Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of the Invention] The present invention relates to a fuel tank open detection device that is installed at an inlet of a fuel tank and detects a partial opening of the fuel tank.

[Summary of the idea]

The fuel tank open detection device according to the present invention is provided with a second lid rotatably attached at a predetermined angle to the first lid that opens and closes the opening of the tube, and a permanent magnet is attached to the surface of the second lid. the second lid is in contact with the side wall of the tube when the first lid is partially opened, and magnetic sensing means provided on the side wall allows the first lid to be partially opened. Detection device [Prior art and its problems] (Prior art) Conventionally, it is known that a fuel tank of a vehicle is equipped with an open detection sensor that detects the opening of the fuel inlet. (For example, JP-A-55-
(Refer to Publication No. 154251). There is also known a tank in which a rotatable lid that can be rotated by 90 degrees is attached to the end of the tube of the tank (see, for example, Japanese Utility Model Application Publication No. 157427/1983).

In order to detect the opening of the lid provided on this tube, it has been considered to provide a contact switch such as a limit switch at one end of the lid.

(Problem to be solved by the invention) However, by providing a detection sensor for a contact switch at one end of the lid as described above, the opening of the lid is detected by the stroke of the contact switch. In the case of a nozzle or when the fluoro nozzle is not fully inserted, the lid will be partially opened, so there is a risk that the stroke will be too small to detect the opening of the lid. In addition, in order to deal with this problem, if the contact switch is installed in a position where it can detect even if the lid is partially opened, it is possible to insert the filler nozzle in the appropriate position or when the filler nozzle is long. There may be problems such as getting in the way of insertion.

[Purpose of invention]

The present invention has been made in view of the problems of the conventional opening detection device, and its technical problem is to detect opening when the lid is opened at a predetermined angle.

[Structure and effect of the idea]

(Means for Solving the Problems) The present invention is a fuel tank open detection device that is installed at an inlet of a fuel tank of a vehicle and detects the opening/closing state of the fuel tank.
a second lid that is rotatably attached to the fuel tank side surface of the first lid and has a permanent magnet on its surface; a biasing means for elastically holding the second lid and pressing the second lid against the tube while maintaining the elastic state when the first lid is opened; The magnetic detection means is provided at a position facing the permanent magnet and detects opening of a predetermined angle when the permanent magnet comes into contact with the permanent magnet.

(Operation) According to the present invention having such characteristics, the first
When the lid is opened to a predetermined angle, the second lid rotates at the same time as the lid rotates, and its surface contacts the side wall of the tube. Therefore, the magnetic detection sensor provided on the side wall of the tube detects the magnetism of the permanent magnet of the second lid, and the first partial opening is detected. When the first lid is further opened, the biasing means of the second lid gradually narrows the angle between the second lid and the first lid, so that the first lid can be opened completely without any trouble.

(Effect of the invention) Therefore, according to the invention, an open detection signal can be obtained even when the lid is partially opened. Therefore, the safety of the vehicle can be improved by turning off the ignition switch of the vehicle or operating the fuel gas suction device of the fuel tank based on this signal.

[Explanation of Examples]

FIG. 1 is a sectional view showing a fuel tank open detector device according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a cross-sectional view of a fuel tank having the fuel tank open detector device of this embodiment. It is a schematic diagram showing the vicinity. In these figures, a tube 1 connects a side wall 2 of a vehicle body and a fuel tank 3. A cap (not shown) is provided at the end of the side wall of the tube 1, and a lid 4 is further provided inside the tube 1. Lid 4 is shaft 5
It is held rotatably through 90 degrees around the center, and is normally biased by a spring 6 to seal the fuel inlet 7, as shown in an exploded view in FIG.
Now, in the present invention, this lid 4 is further provided with an inner lid 8. As shown in an exploded view in FIG. 5, the inner lid 8 is rotatably held along a shaft 5, and a torsion coil spring 9, which is a biasing means provided on the shaft 5, is attached between it and the lid 4. It will be done. The torsion coil spring 9 restricts the inner lid 8, which is pressed between the inner lid 8 and the tube side wall 2, so that the angle with the lid 4 becomes narrow when the lid 4 is opened. A stopper 10 is provided on the lid 4 so that the angle with the inner lid 8 is a predetermined angle, for example, 45 degrees or less, and the stopper 10 is held so that the angle between the inner lid 8 and the lid 4 is less than 45 degrees. . A permanent magnet 11 is attached to the surface of this inner lid 8 as shown in the figure. A sensor section 12, which is a magnetic detection means, is attached at a position opposite to this permanent magnet when the inner lid 8 is rotated to the position shown by the two-dot chain line in the figure. The sensor section 12 includes, for example, a well-known Hall 1C element that detects the presence or absence of magnetism and provides a digital output.
It detects the proximity of the permanent magnet 11 and gives a lid opening signal to the outside.

Now, when the fuel nozzle 13 of the gasoline gun is inserted into the opening of the tube 1, the lid 4
rotates. For example, if the lid 4 is opened 45 degrees, the inner lid 8
reaches the side wall of tube 1. At this time, the lid 4
Although the opening angle is 45° and it is not completely opened, the sensor section 12 is activated by the permanent magnet 11 provided on the inner lid 8 and outputs a lid opening signal to the outside. . When the fuel nozzle is inserted deeper into the tube 13, the inner lid 8 twists against the coil spring 9 and the angle with the lid 4 is reduced.
The lid 4 can be completely opened to the position shown by the two-dot chain line in the figure. Based on this open detection signal, it is possible to turn off the ignition switch of the vehicle or operate the fuel gas suction device of the fuel tank.

In this embodiment, the mounting angle of the inner lid 8 is 45°, but it goes without saying that it can be set at a different angle. Furthermore, although a torsion coil spring is used as a biasing means for the inner lid, other biasing means may also be used.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a fuel tank open detection device according to an embodiment of the present invention, and FIG. 2 is a side view thereof.
Fig. 3 is a schematic diagram showing the state in which the fuel tank open detection device according to this embodiment is installed on a vehicle;
FIG. 5 is an exploded view of the lid 4 and the inner lid 8 attached thereto. 1...Tube, 2...Side wall, 3...Fuel tank, 4...Lid (first lid), 5...Shaft, 6...Spring, 7...Fuel inlet, 8...Inner lid ( second lid),
9...Torsion coil spring (biasing means), 10...
Stopper, 11... Permanent magnet, 12... Sensor section (magnetic detection means).

Claims (1)

[Claims for Utility Model Registration] A fuel tank open detection device that is installed at an inlet of a fuel tank of a vehicle and detects whether the fuel tank is opened or closed, comprising: a first lid that opens or closes a tube of the fuel tank; a second lid that is rotatably attached to the fuel tank side surface of the lid and has a permanent magnet on its surface; and a second lid that elastically holds the second lid at a predetermined angle with the first lid. and a biasing means for pressing and biasing the second lid against the tube side wall while maintaining an elastic state when the first lid is opened; A fuel tank opening detection device comprising: magnetic detection means provided at a position facing the permanent magnet to detect opening at a predetermined angle when the lid comes into contact with the tube side wall.