JPS5833548Y2 - Vehicle liquid tank liquid level decrease warning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a liquid level reduction alarm device that warns of a decrease in the liquid level in a vehicle liquid tank such as a brake mask cylinder of a vehicle.

This type of liquid level reduction warning system consists of a liquid level detection device provided in the liquid tank and an alarm in the driver's seat of the vehicle.

The liquid level detection device is equipped with a switch tube that houses a reed switch and a float with a magnet that floats on the liquid surface.When the liquid level drops to a specified level, the reed switch is activated by the float's magnet and is connected to the reed switch. Activate the alarm in the driver's seat of the vehicle to warn of low fluid level.

In such a liquid level reduction alarm device, it is necessary to inspect whether it operates normally.

Conventionally, the cap of the liquid tank was removed, the switch cylinder and the float with magnet were removed from the liquid tank, the float with magnet was manually moved to the reed switch position of the switch cylinder, the reed switch was turned on, and the switch was placed in the driver's seat of the vehicle. A method is being used to go back and confirm that the alarm is working.

Another method is to artificially lower the magnetic float by pressing the push button without removing the cap.
There is a way to turn on the reed switch and check if the alarm in the driver's seat of the vehicle is activated.

Either method requires opening the hood of the vehicle, which is cumbersome and also gets your hands dirty.

Also, the latter method cannot be checked by one person.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid level reduction warning device for a liquid tank for a vehicle, which allows a person in the driver's seat of the vehicle to confirm the alarm activation by a simple operation.

In order to achieve this objective, the present invention incorporates a push-down means in the cavity formed in the upper part of the cap of the liquid tank, and attaches the push-down lever to the cap so as to be able to move up and down. Driving means is provided in the vehicle driver's seat to protrude into the space of the cap and contact the lower end of the push-down means, and to bring the lower end of the push-down rod into contact with the upper surface of the magnetic float at the upper limit position to drive the push-down means. The present invention is characterized in that the push-down means pushes down the magnetized float to the reed switch position via the push-down rod by operating the drive means of the driver's seat of the vehicle.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention used in a liquid tank 2 of a mask cylinder body 1.

The liquid tank 2 is connected to a liquid pressure chamber 4 formed in front of the piston 3 in the mask cylinder body 1 via a return port 5 and a compensating port 6.

A switch tube I is disposed within the liquid tank 2 and supported by a cap 8.

The reed switch 9 inside the switch tube 7 is at the specified level 10.
is fixed at the position corresponding to.

The reed switch 9 is connected to the vehicle driver's seat 1 by a lead wire 11.
It is electrically connected to a power source 15 via an alarm device 13 and an ignition switch 14 of No. 2.

A float 16 with a magnet is fitted into the switch cylinder 7 so as to be able to move up and down along the switch cylinder 7, and a permanent magnet 17 is attached to a portion of the float 16 with a magnet facing the switch cylinder 7.

A lower limit stopper 18 that determines the lower limit position of the magnetized float 16 is attached to the lower end of the switch tube 7 .

19 is the upper limit level of the liquid level 20.

A push rod 22 is disposed passing through the upper end edge of the switch tube I and the push rod guide 21.

The lower end of the push rod 22 hits the upper surface of the magnetic float 16,
The upper limit position of the magnetized float 16 is determined.

The upper end of the push rod 22 is a space 2 provided in the cap 8.
3 and comes into contact with a diaphragm 24 provided in the cavity 23.

The diaphragm 24 corresponds to the push-down means of the present invention.

The diaphragm 24 communicates with an air bladder 25 installed in the driver's seat 12 of the vehicle.

The air bag 25 corresponds to the driving means of the present invention.

When the liquid level 20 in the liquid tank 2 decreases to the specified level 10 during use of the mask cylinder body 1, the magnet material float 16 descends to the position shown by the dashed line in the drawing 1, and the permanent magnet 1
7 approaches the reed switch 9, the reed switch 9 closes, and the alarm 13 lights up to warn that the liquid cylinder is running low.

When confirming the alarm activation, the air bag 25 is pushed to send air to the diaphragm 24 and inflate the diaphragm 24.

As a result, the push rod 22 is pushed down, and the magnetized float 16 is pushed down to the position indicated by the two-dot chain line.

Therefore, the reed switch 9 closes and the alarm 13 lights up.

If the alarm 13 does not light up even if the air bag 25 is pressed,
Either the reed switch 9 or the alarm 13 is defective, or there is a break in the electrical wiring.

Note that the air bag 25 may be provided with a ventilation hole.

In this case, when pressing, cover the ventilation hole with your finger.

FIG. 2 shows another embodiment of the present invention, in which a lever 27 rotatably supported on a fulcrum 26 is used as the push-down means, and a wire 29 with a knob 28 at the tip is used as the drive means.

To confirm alarm activation, grip the knob 28 and pull the wire 29 diagonally downward.

As a result, the lever 27 rotates clockwise about the fulcrum 26 and pushes down the push rod 22.

Therefore, the magnetic float 16 is pushed down to the position indicated by the two-dot chain line, the reed switch 9 is closed, and the alarm 13 is turned on.

Note that the pressing means and driving means are not limited to those shown in the illustrated embodiment, and may be replaced with other suitable means.

As explained above, according to the present invention, the push-down means is built into the space formed in the upper part of the cap of the liquid tank, the push-down lever is attached to the cap so as to be movable up and down, and the upper end of the push-down lever is moved upwardly and downwardly. Driving means is provided in the vehicle driver's seat to protrude into the space of the cap and contact the lower end of the push-down means, and to bring the lower end of the push-down rod into contact with the upper surface of the magnetic float at the upper limit position to drive the push-down means. Therefore, by operating the drive means in the vehicle driver's seat, the push-down means pushes down the magnetic float to the reed switch position via the push-down rod, so that one person can easily perform the work from the vehicle driver's seat. You can check whether the alarm is activated.

When replenishing liquid to the liquid tank, when the cap is removed, both the push-down means and the push-down rod are removed from the liquid tank, so the replenishment of liquid is not hindered by the push-down means or the push-down rod. , it is possible to facilitate the liquid replenishment work.

Since the push-down means is built into the cap, adhesion of dust and the like is prevented and maintenance is unnecessary.

Furthermore, since the push rod receives the buoyant force of the magnetic float, a return spring for the push rod can be eliminated.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing another embodiment of the present invention. 2...Liquid tank, T...Switch tube, 8.
... Cap, 9 ... Reed switch,
12...Vehicle driver's seat, 13...Alarm, 16...Float with magnet, 17...
Permanent magnet, 20...Liquid level, 22...Press rod, 23...Vacancy, 24...Diaphragm, 25...Air Bag, 27... Lever, 2B... Knob, 29... Wire.

Claims (1)

[Scope of utility model registration request] A magnetic float floating on the liquid surface of a liquid tank, a reed switch housed in a switch cylinder supported by the cap of the liquid tank, and operated by the magnet of the magnetic float when it drops to a specified level, and installed in the driver's seat of the vehicle. In a liquid level alarm device for a vehicle liquid tank, which is equipped with an alarm that warns of a decrease in the liquid level by the operation of a reed switch, a push-down means is built into a space formed in the upper part of the cap, and a push-down lever is installed. is attached to the cap so as to be movable up and down, and the upper end of the push-down rod is projected into the space of the cap and brought into contact with the lower end of the push-down means, and the lower end of the push-down rod is brought into contact with the upper surface of the magnetic float at the upper limit position. 1. A liquid level reduction alarm device for a liquid tank for a vehicle, characterized in that a drive means for driving a push-down means is provided in a vehicle driver's seat.