JPS6031921Y2 - Spare tire pressure warning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spare tire pressure alarm installation for a vehicle.

Since a vehicle's spare tire is generally placed under the floor of the vehicle or in the trunk, it is troublesome to check the air pressure of the spare tire each time before getting into the vehicle, and checking itself is difficult. .

Furthermore, no warning device has been developed that automatically checks the air pressure of a spare tire and notifies the driver of whether the air pressure is insufficient.

Therefore, there is a possibility that a situation may occur in which the driver only discovers that the spare tire's air pressure is insufficient after the tire becomes flat.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an alarm device that issues an alarm when the air pressure of a spare tire decreases, in order to eliminate the above-mentioned disadvantages.

The warning device of the present invention warns whether the air pressure of the spare tire is excessive or insufficient when the spare tire is held on the vehicle body by a spare tire carrier having a base fixed to the vehicle body and a bolt attached to the base. .

This alarm device is provided between a screw receiver provided on the threaded portion or head of the bolt, and the spring receiver and the base, or between the spring receiver and the casing provided on the head side of the bolt. It is characterized in that it includes a spring that is arranged and moves against the air pressure of the spare tire, a switch that is opened and closed by the spring receiver, and a power source and alarm means that are connected to the switch.

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

In the warning device of the present invention, as shown in FIG.
4 and a bolt 16 attached to the base 14.

As shown in FIG. 2, this alarm device 20 includes a spring receiver 2
2, a spring 24, a switch 26, a power source 28, and an alarm means 30.

The spring receiver 22 is provided with a flange portion 31 on the periphery and a recess 32 in the center.

As shown in FIG. 4, the flange portion 31 has a notch 33 into which a key-shaped convex portion 15 provided on the base 14 is inserted to prevent the spring receiver 22 from rotating. ing.

A nut 34 is fixed to the lower surface of the recess 32, and a bolt 16 of the bare tire carrier 18 is screwed into the nut 34.

During this screwing, the notch 33 works with the protrusion 15 to prevent the spring receiver 22 from rotating as described above.
The spring receiver 22 moves in the axial direction of the bolt 16.

In the illustrated example, the base 14 has a ceiling part 35, and the spring 2 is disposed between the ceiling part 35 and the recess 32 of the spring receiver 22.
4 is placed.

This spring 24 acts against the air pressure within the spare tire 10.

The air pressure of the spare tire 10 is, for example, 90,000 yen, which is a predetermined air pressure.
Volt 1 by the concerned spare tire when reduced to %
The spring force is set so as to overcome the force exerted on the spring receiver 6 and push the spring receiver 22 downward.

In the example shown in FIG. 2, the bolt 16 is mounted so as to be movable through a through hole 36 provided in the ceiling portion 35 of the base.

Preferably, a stopper 38 is disposed below the spring receiver 22.

This stopper 38 prevents the spring receiver 22 from being lowered further by the spring 24.

The switch 26 includes an actuating body 42 formed by connecting a pair of discs 39.40 with a rod 41, a spring 44, and a pair of contacts 45.4.
It consists of 6.

The rod 41 is movably passed through a hole provided in the ceiling part 35 of the base 14, and is inserted between the ceiling part 35 and the lower disc 40.
The rod 41 is biased downward by a spring 44 disposed between.

This bias brings the contact 45 attached to the upper disc 39 via an appropriate insulating material and the contact 46 attached to the ceiling portion 35 of the base via an appropriate insulating material into contact.

If the weight of the actuating body 42 is increased and the rod 41 is configured to move on the ceiling portion 35 without receiving any resistance, the provision of the spring 44 is not necessary.

However, from the viewpoint of ensuring operation, the spring 44
It is preferable to provide

The contacts 45, 46 are connected to a power source 28 and an alarm means 30.

This alarm means 30 consists of an electric light, an external buzzer, etc., and is placed in the driver's seat.

In use, insert the bolt 16 into the spring retainer 2 in the base 14.
The spare tire 10 is fixed to the vehicle body 12 by screwing into the nut 34 provided on the tire 2 and tightening the disc wheel 11 of the spare tire 10.

In this case, it is preferable to provide a plurality of protrusions 13 on the vehicle body 12.

When the spare tire 10 is held by the spare tire carrier 18 as described above, the original spare tire 10
The air pressure inside is sufficiently high that when the bolt 16 is screwed in to a certain extent, the spring receiver 22 is pulled upward as shown in FIG.

As a result, the rod 41 of the switch 26 is pushed upward, the contacts 45 and 46 are separated, the switch is turned OFF, and the alarm means 30 is not activated.

In this state, fixing of the spare tire 10 is completed.

When the air pressure of the spare tire 10 in the held state decreases to, for example, 90% of the predetermined tire air pressure, the spring force of the spring 24 causes the projection 13 provided on the vehicle body 12 to
gets stuck in spare tire 10, and spare tire 1
0 moves downward in the diagram.

For this reason, as shown in FIG. 2, the bolt 16 also goes down, so the spring receiver 22 goes down together with the bolt 16, and at the same time the rod 41 of the switch 26 goes down due to the action of the spring 44, causing the contacts 45, 46 of the switch 26 to go down. comes into contact.

As a result, the alarm means 30 is activated to alert the driver.

FIGS. 5 and 6 show another example of the air pressure warning device of the present invention.

This alarm device also includes a spring receiver 50, a spring 52, a switch 54, a power source 56, and an alarm means 58.

The spare tire carrier 60 of the spare tire 10 is the vehicle body 1
2, and a bolt 64 that is screwed into a nut 63 that is fixed to the base 62.

The spring receiver 50 is fixed to the upper end of the bolt 64.

This spring receiver 50 has a thick rim 65 on its periphery, and two notches 66 similar to the notches 33 provided in the flange portion 31 of the spring receiver 22 in the above example are provided on the rim 65. ing.

The spring receiver 50 is surrounded by a casing 68.

One end 67 of the casing 68 is open, and two key-shaped protrusions 69 are provided on the inside.

Each convex portion 69 is inserted into the notch 66 of the spring receiver 50, and the spring receiver 50 is housed in the casing 68.
A second spring receiver 72 is attached to the open end 67 of 8 by caulking.

As a result, the spring receiver 50 does not rotate relative to the casing 68 and is movable in the axial direction of the bolt 64.

The spring 5 is placed between the spring receiver 50 and the second spring receiver 72.
2 is positioned and biases the casing 68 downwardly relative to the bolt 64.

This spring 52 acts against the air pressure of the spare tire 10, for example, when the air pressure of the spare tire is at a predetermined pressure of 9.
When it drops to 0%, the spring force is set to insert and lower the casing 68.

A stopper 74 is provided inside the ceiling portion 73 of the casing 68.

When this stopper 74 comes into contact with the spring receiver 50, further insertion and lowering of the casing 68 is inhibited.

The switch 54 is further provided inside the ceiling portion 73 of the casing 68.

This switch 54 has a contact 75 attached to the ceiling 73 of the casing 68 via an insulating material, and a contact member 77 attached to the ceiling 73 at a position 76 apart from the contact 75 via an insulating material. We are prepared.

The contact member 77 is entirely formed of a leaf spring formed in a U-shape, and when not receiving force from the spring receiver 50, its contact portion 78 is separated from the contact 75 by the spring force.

When the stopper 74 contacts the spring receiver 50, the contact member 77 is elastically deformed by the spring receiver 50, and its contact portion 78 contacts the contact 75.

An insulating material is appropriately placed at a portion of the spring receiver where the spring receiver 50 comes into contact with the contact member 78.

A lead wire 80 is connected to the contact 75 of the switch 54 and the contact member 77, and is connected to the power source 56 and the alarm means 58.

This alarm means consists of a lamp, a buzzer, etc., as in the previous example.

To use the alarm device of this example, use a tool to turn the handle part 82 provided integrally on the ceiling part 73 of the casing 68, and turn the bolt 64 using the convex part 69 of the casing 68 and the spring receiver 50. Tighten the disc wheel 11.

When bolt 64 is tightened to a certain point, spare tire 1
The casing 68 is inserted and raised by zero air pressure.

As a result, the switch 54 is turned off.

When the air pressure of the spare tire 10 held by the spare tire carrier 60 decreases and the spring force of the spring 52 exceeds the force due to the air pressure, the spring 52 causes the casing 68 to
is inserted and lowered.

As a result, the contact member 77 is elastically deformed by the spring receiver 50, the switch 54 is turned on, and the alarm means 5
8 will issue an alarm.

According to the present invention, an alarm can be issued when the air pressure of the spare tire decreases, so that the user knows that the air pressure of the spare tire has decreased only after the tire goes flat.

Such situations can be prevented from occurring.

Moreover, there is no need for the troublesome effort of checking the air pressure of the spare tire every time you get into the car.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing a spare tire held by a spare tire carrier, Figure 2 is a sectional view of the air pressure alarm device of the present invention, with the switch turned on, and Figure 3 shows the switch turned off. 4 is a sectional view taken along the line 4-4 in FIG. 3, FIG. 5 is an explanatory view showing a spare tire held by another example of a spare tire carrier, and FIG. 6 is a separate view. FIG. 2 is a sectional view showing an example of the pneumatic pressure alarm device. 10 Nispare tire, 12: Vehicle body, 14,62: Base, 16,64: Bolt, 18,60 Nispare tire carrier, 20: Alarm device, 22゜50: Spring receiver, 24,
52: Spring, 26, 54: Switch.

Claims (1)

[Scope of utility model registration request] A device for warning the air pressure of a spare tire held on the vehicle body by a spare tire carrier having a base fixed to the vehicle body and a bolt attached to the base, the device comprising a spring provided on the threaded portion or head of the bolt. a spring disposed between the spring receiver and the base or between the spring receiver and a casing provided on the head side of the bolt and working against the air pressure of the spare tire; A spare tire air pressure alarm installation comprising a switch opened and closed by a receiver, and a power supply and alarm means connected to the switch.