JPH064012Y2 - Oil filler cap attachment / detachment detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an oil filler cap attachment / detachment detection device for the purpose of taking out the history of replenishment and replacement of engine oil in an automobile or the like as an electric signal. .

(Prior Art) Conventionally, there is no known device that electrically detects replenishment and replacement of engine oil and electrically records the history.

However, in the future, as engine oil becomes maintenance-free, it is desired to manage the amount, deterioration degree, and replacement time of engine oil using a microcomputer or the like.

(Problems to be solved by the invention) Normally, the oil filler cap is opened and closed only when the engine oil is refilled or replaced. Therefore, by detecting the attachment / detachment of the oil filler cap, it is possible to record the history of replenishment and replacement of engine oil.

Therefore, it is possible to directly attach a sensor for detecting attachment / detachment to the oil filler cap. However,
When the sensor is directly attached to the oil filler cap, the lead wire of the sensor has to be attached / detached at the time of attachment / detachment in the screw type cap, which may cause an accident such as forgetting the connection.

(Means for Solving Problems) This invention is a device for detecting the attachment / detachment of an oil filler cap,
A hole for fitting a reed switch is provided in the head cover of the engine, a reed switch is fitted in the hole with its operating side facing down, and a magnet is installed beside the reed switch. A shield member is mounted between them so that it can move up and down. In addition, a cover plate is installed between the lower part of the shield member and the lower part of the oil filler cap mounting part,
The shield member is supported on one side of the upholstery plate, and the oil filler cap side of the upholstery plate is urged upward, and is brought into contact with the lower end of the oil filler cap to move up and down by attaching and detaching the oil filler cap. Is done.

That is, the attachment / detachment of the oil filler cap is transmitted to the shield member installed at a position distant from the cap as the up / down movement of the boom plate, and the reed switch is operated by raising / lowering the shield member.

(Operation of the Invention) In this invention, when the oil filler cap is attached, the one side of the upholstery board and the shield member supported by the one side are also in the predetermined positions, and the other side, that is, the oil filler cap side is Pressed down by the bottom edge of the cap. On the other hand, when the oil filler cap is removed, the upholstery plate rises and the positions of the other side and the shield member also move. Due to this movement, the relative positions of the magnet, the shield member, and the reed switch are changed, and the reed switch is turned on or off. Therefore, the attachment / detachment of the oil filler cap is obtained as an electric signal, and by inputting this to the microcomputer, the attachment / detachment of the oil filler cap, that is, the history of oil replenishment or replacement is automatically recorded.

In addition, if a signal input manually is added at the time of oil change, the number of times of oil replenishment is a measure of oil deterioration.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

A hole 2 for fitting a reed switch is formed in a head cover 1 of the engine, and a reed switch 3 is fitted in the hole 2. The reed switch 3 is tightly fitted in a tubular body 5 having a collar 4 with its operating portion facing down. The lower part of the inner cavity of the tubular body 5 is widened, and a magnet 6 is attached to the widened portion, and a cylindrical bottomed tubular member made of a magnetic material is provided between the reed switch 3 and the magnet 6. A shield member 7 is mounted so that it can move up and down.

On the other hand, a planar U-shaped arm 8 is projectingly provided on one side of the cylindrical body 5, and an armature plate 9 is attached with the one side of the arm as a fulcrum. One side of the cover plate 9 faces the lower side of the shield member 7, supports the shield member 7, and is urged downward by a spring 10 mounted on the tubular body 5.

The other side of the armature plate 9 faces below the mounting position of the oil filler cap 11. A pin 12 is provided on the upper surface of the cover plate 9, and the pin 12 abuts on the lower end of the oil filler cap 11 and moves up and down as the oil filler cap 11 is attached and detached. Since one side of the expansion board 9 is biased downward by the spring 10, the expansion board 9 is biased upward on the oil filler cap side.

The relative relationship between the shield member 7 and the magnet 6 is such that when the oil filler cap is attached and the shield member 7 is located above, the magnetic force of the magnet 6 is the same.
The reed switch 3 is cut by the
In the F state, and when the oil filler cap is removed and the shield member 7 is positioned below, the magnet 6
The magnetic force of reaches the reed switch 3 and is turned on.

In the figure, 13 is a nut, 14 is a cover, and 15 is a connector.

According to this embodiment, when the oil filler cap 11 is mounted, the cap side of the armature plate 9 is pushed down and the switch side is pushed up as shown in FIG. At this time, since the magnetic force of the magnet 6 is cut by the shield member 7, the reed switch 3 does not receive the magnetic force, is in the OFF state, and the signal extraction circuit is in the open state. On the other hand, if you remove the oil filler cap 11,
The switch side of the armature plate 9 is pushed down by the force of the spring 10, and the shield member 7 also descends. At this time the magnet 6
The magnetic force reaches the reed switch 3, the switch is turned on, the signal extraction circuit is closed, and the fact that the cap is attached or detached is recorded as an electric signal.

In the above-mentioned embodiment, the spring 10 is used for the expansion board 9
Although one side of the armature plate is urged downward, if one side and the other side of the armouring piece are unbalanced by a means such as attaching a weight to one side lower side of the armouring board 9, One side of 9 can be urged downward. Further, as in the above embodiment, it is usually considered that the signal extraction circuit is opened when the cap is attached, and the circuit is closed when the cap is removed, but the opening and closing conditions can be reversed. .

Although the fulcrum of the armature plate 9 is provided between the reed switch and the lower part of the oil filler cap in the above embodiment, the fulcrum of the armature plate may be provided on the left side of the reed switch in FIG.

(Effect of the Invention) According to this invention, the attachment / detachment of the oil filler cap can be detected and taken out as an electric signal. Therefore, by connecting the detection device of the present invention to a microcomputer or the like, the history of replenishment and replacement of engine oil can be electrically recorded and taken out as necessary.
Further, since the sensor is not directly attached to the oil filler cap, the operation itself of the oil filler cap is exactly the same as the conventional one, and since no manual operation is involved in inputting, the reliability of recording is high.

Also, by connecting to an appropriate alarm device, it can be used as a device for preventing forgetting to tighten the oil filler cap.

[Brief description of drawings]

FIG. 1 is a sectional view of the embodiment of the invention, and FIG. 2 is a plan view of the same. 1 ... Head cover, 2 ... Hole, 3 ... Reed switch, 6 ... Magnet, 7 ... Shield member, 9 ... Expander plate, 10 ... Spring, 11 ... Oil filler cap

Claims (1)

[Scope of utility model registration request] 1. A head cover of an engine is provided with a hole for fitting a reed switch, the reed switch is fitted in the hole with its operating side facing down, and a magnet is installed beside the reed switch. And a reed switch, a shield member is mounted so as to be able to move up and down, and a cover plate is installed between the lower part of the shield member and the lower part of the oil filler cap mounting portion, and the shield member is on one side of the cover plate. An oil filler cap attachment / detachment detector supported on the oil filler cap side, is urged upward, abuts against the lower end of the oil filler cap, and is moved up and down by attaching and detaching the oil filler cap. .