KR200330152Y1 - Apparatus for alarming variation air pressure in tire - Google Patents

Abstract

The present invention relates to a tire air pressure change warning device of a vehicle that enables the driver to automatically notify the driver of a change in air pressure of a tire, and has a valve core for opening and closing an air passage by moving to be mounted on a tire to inject air. Air valve body used to; Air cap having a pressure sensor for detecting the air pressure of the tire and a sensing signal output unit for wirelessly outputting the detected signal; Moving the valve core by the air cap is fastened to the air valve body And a push rod configured to transfer the air pressure of the tire to the pressure detecting sensor, and detecting an abnormal change in tire pressure by a detection signal receiving unit and a received signal for receiving an air abnormality detection signal wirelessly transmitted from the detection signal output unit. An output means for outputting is configured inside the vehicle.

Description

Apparatus for alarming variation air pressure in tire}

The present invention relates to a technology for detecting the air pressure of a car tire, and more particularly, to a tire air pressure change warning device of an automobile, in which an air pressure sensor is configured in an air cap of an air inlet of a tire to automatically alert a driver of a change in air pressure. About,

Generally, tires for automobiles are integrally fastened with wheels to rotate in contact with a road surface only in a car, absorb shocks transmitted to the car from a road surface, and simultaneously brake, drive, and turn a car.

The traction between the tire and the road surface is the most influential factor of the tire pressure when the environment of the road surface is constant.

Various problems occur when the tire pressure is not normal, but when the tire pressure is excessive, the ride comfort is reduced.

In addition, when the air pressure of the tire is lower than the critical range, the traction between the road surface and the tire is reduced, so that the risk of a safety accident is followed. If the road surface is wet or unpaved, the possibility of an accident is further increased.

If the high-speed driving in the state where the tire pressure of some of the tires is insufficient, it can cause a very dangerous condition.

In order to reduce the possibility of such a risk, it is necessary to periodically check the tire pressure. In the related art, the way in which the driver recognizes the tire pressure is visual observation based on the driver's experience, or visits the workshop directly and uses a specific device to check the air pressure. Mainly used to measure the method.

In addition, various devices for measuring the air pressure of the tire or detecting the change in air pressure have been proposed. However, since an expensive system that is mainly required to be installed at the time of production by an automobile manufacturer, it is not advantageous in terms of cost, and in the case of automobiles that have already been produced and sold It is difficult to mount the device.

In addition, even in the case of the air pressure sensing device that can be installed after the sale there is an inconvenience that must use a car repair shop.

That is, since most of them are mounted inside the wheel, it is difficult for the driver to simply install the vehicle.

This causes the driver to bear the cost and use of time, which in many aspects leads to consumer inconvenience.

The present invention is to solve the problems of the prior art air pressure sensing device, and to provide a tire air pressure change warning device of a new vehicle.

The tire pressure change warning device for a vehicle according to the present invention provides a structure in which a driver can be easily mounted on a vehicle.

The tire pressure change warning device for a vehicle according to the present invention provides a structure in which an output means for informing a user of an air pressure change detection signal is configured inside a vehicle.

The tire pressure change warning device for a vehicle according to the present invention provides a structure in which data transmission and reception is wirelessly performed between an air pressure change detection means and an output means for informing a user.

The object of the present invention is to provide a tire inflation pressure change warning device for a vehicle, which makes it possible to automatically notify a driver of a change in inflation pressure by configuring an inflation pressure sensor in an air cap of an air inlet of a tire.

1 is a block diagram of a configuration of a tire pressure change warning device according to the present invention

Figure 2 is a cross-sectional view showing a state before coupling of the tire air valve and the air cap according to the present invention

Figure 3 is a cross-sectional view showing a state after the combination of the tire air valve and the air cap according to the present invention Figure 4 is a configuration diagram showing an example in which the detection signal output means mounted inside the vehicle according to an embodiment of the present invention

Explanation of symbols for the main parts of the drawings

21.Air valve body 22.Air flow path

23. Return Spring 24. Jam Jaw

25. Valve core 26. Guide member

27.Push Rod 28.Air Cap

29. Pressure sensor 30. Air packing 31. Detection signal output 32. Power supply

The tire inflation pressure change warning device for a vehicle according to the present invention for achieving the object described above has a valve core for opening and closing the air passage by moving the air valve body mounted on the tire and used to inject air; An air cap having a pressure sensing sensor for detecting air pressure and a sensing signal output unit for wirelessly outputting a sensed signal; moving the valve core by fastening the air cap to an air valve body to convert the air pressure of the tire into the pressure sensing sensor A push rod configured to transmit an abnormality change in tire inflation pressure by a received signal and a detection signal receiver configured to receive a pneumatic abnormality detection signal wirelessly transmitted from the detection signal output unit. It is characterized by.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of the embodiments.

Referring to the accompanying drawings, a preferred embodiment of the tire pressure change warning apparatus for a vehicle according to the present invention will be described in detail as follows.

1 is a block diagram illustrating a configuration of a tire pressure change warning device according to the present invention.

The tire pressure change warning device according to the present invention wirelessly outputs an air abnormality signal when the air pressure detection unit 11 for detecting a change in tire air pressure and the air pressure detected by the air pressure detection unit 11 are lowered to a predetermined level or more. The sensing signal output unit 12 and the air pressure sensing unit 11 and the power supply unit 13 for supplying operating power to the sensing signal output unit 12 are configured inside the air cap of the tire.

In addition, a means for outputting an abnormal signal of tire inflation pressure to a specific position (for example, a position easily recognized by the driver) inside the vehicle is configured. For example, as shown in FIG. 4 illustrates a state in which the power supply unit 16, the pneumatic abnormality signal output unit 15, and the detection signal receiving unit 14 are integrally mounted and mounted on a dashboard in front of the passenger seat inside the vehicle. Naturally, it is possible to mount it on the dashboard around the driver's seat or on one side of the rearview mirror instead of the dashboard in front of the passenger seat.

The configuration is a detection signal receiving unit 14 for wirelessly receiving the air pressure abnormal signal output from the detection signal output unit 12 inside the air cap, and the abnormal signal of the tire pressure by the signal received from the detection signal receiving unit 14 The pneumatic abnormality signal output unit 15 outputs the driver so that the driver can know it, and the power supply unit 16 that supplies operating power to the sensing signal receiving unit 14 and the pneumatic abnormality signal output unit 15.

Here, in the power supply unit 13, a small secondary battery such as a primary battery or a lithium ion battery is embedded in the air cap.

In addition, the power supply unit 16 may be configured by connecting the power of the vehicle itself or by installing a separate battery box.

In addition, the pneumatic abnormal signal output unit 15 configures LEDs (Light Emitting Diodes) at positions facing each other in four directions to distinguish the positions of the tires so that the driver blinks when the level of the pneumatic pressure drops to a predetermined value. Can be configured to know.

In this case, a small speaker may be built in the pneumatic abnormality signal output unit 15 so as to output an alarm sound at the same time.

Alternatively, it is possible to configure a plurality of LEDs such that each of the promised tire number is displayed.

For example, if the air pressure level of the front left tire is abnormal, "1" is displayed, "2" for the right front tire, "3" for the left rear tire and "" for the right rear tire. 4 "is displayed and can be configured to flash.

Alternatively, the display can be configured using a small liquid crystal display (LCD) panel to display the tire number and the current air pressure level sequentially at the start of the differential.

And the signal transmission and reception between the detection signal output unit 12 and the detection signal receiving unit 14 uses the RF wireless transmission and reception method in consideration of the circuit configuration cost and transmission and reception distance.

Detailed configuration of the tire inflation pressure change warning device of a vehicle according to the present invention as described above is as follows.

2 is a cross-sectional view showing a state before coupling of the tire air valve and the air cap according to the present invention, Figure 3 is a cross-sectional view showing a state after the combination of the tire air valve and the air cap according to the present invention.

The air valve according to the present invention is a form in which the portion coupled to the tire is covered by a rubber outer member.

The portion of the air valve body 21 in which the screw engaging portion is formed on the outer circumferential surface is exposed without being covered by the outer member, and the screw engaging portion of the exposed portion and the screw on the inner circumferential surface of the air cap are fastened.

The overall structure is formed in a cylindrical shape is coupled to the air valve body 21 and the screw coupling portion of the air valve body 21 having a function of providing an air inlet passage and blocking the air injected into the tire from flowing out Pressing the valve core of the air valve body 28 and the air cap 28 in which the pressure sensor 29 for detecting the air pressure inside the tire, the detection signal output unit 31, the power supply unit 32 are integrated. And a push rod 27 which serves to transfer air pressure to the pressure sensing sensor 29.

Here, the air valve body 21 has an air passage 22 having a first diameter at one side thereof and used as a passage for injecting and discharging air, and a second larger than the first diameter in the air passage 22. It is composed of a form having a return spring 23, one end is supported on the extending portion having a diameter, and one side has an expansion plate in contact with the return spring 23 and a core pillar having a smaller diameter and extending from the center of the expansion plate When the air cap 28 is not fastened by the return spring 23, it moves forward and prevents the air inside the tire from flowing out, and when the air is injected, the air inflow passage is moved backward. A core of the valve core 25 protruding from the inner circumferential surface at a middle portion of the valve core 25 and a middle portion of the extension portion having the second diameter of the air valve body 21. It has a circular through hole capable of moving to limit the distance that the valve core 25 moves forward, and in close contact with the other surface of the expansion plate of the valve core 25 in the forward movement of the valve core 25 It comprises a locking jaw 24 for blocking and a guide member 26 fixed to the front spaced apart from the locking jaw 24 to maintain a constant moving direction of the core pillar of the valve core (25). .

Here, the diameter of the expansion plate of the valve core 25 is configured to be smaller than the second diameter of the air valve body 21, the core pillar has a diameter smaller than the diameter of the through hole of the locking jaw (24).

A thread is formed on a part of the outer circumferential surface of the extended portion having the second diameter of the air valve body 21.

The above description prescribes and explains the part with the air flow path 22 to the back, and the part with the guide member 26 to the front.

And one end of the push rod 27 is in contact with the core pillar of the valve core 25 and the other end is in contact with the pressure sensor (29).

Here, when the air cap 28 is fastened, the push rod 27 enters the inside of the extension portion of the air valve body 21 to directly sense the air pressure inside the tire while blocking air primarily.

When air is not completely blocked by the push rod 27 and fine air flows out, the air cap 28 is again fastened to the threaded portion of the air valve body 21 by the air packing 30. Secondary shut off completely blocks outflow of air.

In addition, the air cap 28 has a cylindrical shape having an inner circumferential surface except for a portion in which a cap is opened on one side and a pressure part sensor 29, a detection signal output part 31, and a power supply part 32 are embedded. Here, the pressure sensor 29, the detection signal output unit 31 and the power supply unit 32 is integrally formed and installed in the outermost portion. That is, the adhesive is applied to the groove formed in the inner central portion of the air cap 28. The power supply unit 32 may be connected to a circuit as shown in FIG. 1 to supply power to the pressure sensor 29 and the detection signal output unit 31. In order to output the pressure detection signal, a circuit is connected to the pressure detection sensor 29 and the detection signal output unit 31.

On the inner circumferential surface of the cylindrical portion, a screw is configured to correspond to the screw engagement portion of the air valve body 21.

And the inner bottom surface of the air cap 28 is configured with a pressure sensor 29 for detecting the air pressure in the tire delivered by the push rod 27, the pressure sensor 29 is built in the The detection signal output unit 12 transmits a detection signal according to the change in air pressure.

Here, the pressure sensor 29 may be configured using an ultra-compact semiconductor pressure sensor in the form of a plastic dual in package (PIP) or an on-chip absolute pressure semiconductor pressure sensor in the form of a metal can package. In addition to this kind, it is applicable to the case of the micro sensor which can be comprised in the air cap 28 inside.

And although not shown, one surface of the air cap 28 is configured to open and replace the battery for power supply, and the battery box opening and closing means that is closed for battery protection after the battery is mounted.

As such, the tire inflation pressure sensing and sensing signal output means is configured, and the combined state of these means is as in FIG. 3.

That is, when the air rod 28 is engaged with the screw engaging portion of the outer circumferential surface of the air valve body 21 while the push rod 27 is located inside the air cap 28, the valve core 25 moves backward. As the air passage is formed, the air pressure inside the tire acts directly on the push rod 27, and the push rod 27 transmits the corresponding pressure to the pressure sensor 29.

Here, the movement straightness in movement of the valve core 25 is ensured by the guide member 26.

When the air cap 28 is detached due to air replenishment or the like in the fastened state, the pressure sensed value through the pressure sensor 29 is reset.

When the air cap 28 is fastened after injecting air into the tire by the above principle, the air pressure of the tire is sensed by the pressure sensor 29.

When the air pressure detected in this state is lowered by a certain level, the detection signal output unit 12 wirelessly transmits a signal according to the change in air pressure abnormality.

In the embodiment of the present invention, if the pressure level of 5PSI size decreases in the air pressure level detected after the air cap 28 is fastened, it is determined that the change in air pressure has occurred and an alarm is issued.

In general, in the case of a passenger car, the air pressure of the tire is about 28 to 32 PSI. If the pressure of about 5 PSI is reduced, the tire pressure may be determined to be in a dangerous state.

Here, 1 PSI is the size of 0.07kgf / cm ² .

The wirelessly transmitted signal is received by the detection signal receiving unit 14 mounted inside the vehicle to alert the user through the pneumatic abnormality signal output unit 15.

The structure of the air valve body 21 described above is an example of the basic structure for explaining the present invention, the air cap 28 of the present invention to an air valve having another structure that can be made precisely the injection and maintenance of air Of course it is possible to apply).

From the above description, those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention is not limited to the contents described in the embodiments, but should be determined by the utility model registration claims.

Such a tire pressure change warning device for a vehicle according to the present invention has the following effects.

First, since the abnormal change in the tire inflation pressure is automatically notified to the driver, it is possible to secure driving stability, and accurate air pressure detection is possible in an absolute pressure detection method that directly detects the air pressure inside the tire.

Secondly, it is advantageous in terms of user convenience and economics because it can be easily installed without the customer visiting the vehicle repair shop in such a way that the air cap of the tire can be directly detected.

This has the effect of making it easy to build an alarm device in accordance with the tire pressure abnormality change even in a vehicle already sold.

Third, it is possible to drive in a state where the tire inflation pressure is maintained at an appropriate level, it is possible to reduce the tire damage caused by low air pressure to extend the life of the tire.

In addition, there is an effect of preventing the tire peeling and cord cut off due to the low air pressure and thereby prevent the vehicle overturning.

Fourth, the proper maintenance of tire air pressure can reduce the risk of water film during rainy weather and bring fuel saving effect.

Claims (2)

An air valve body mounted to a tire and having a valve core for opening and closing the air passage by moving, the air valve body being used to inject air; An air cap having a pressure sensor for detecting the air pressure of the tire and a detection signal output unit for wirelessly outputting the detected signal; And a push rod for moving the valve core to transmit the air pressure of the tire to the pressure detecting sensor by the air cap being fastened to the air valve body. The tire pressure change of the vehicle, characterized in that the sensing signal receiving unit for receiving the air pressure abnormality detection signal wirelessly transmitted from the detection signal output unit and the output means for outputting the abnormal change in tire air pressure by the received signal is configured inside the vehicle. Alarm device. The tire inflation pressure change warning device according to claim 1, wherein an abnormality signal of the tire inflation pressure is output when a level of the inflation pressure detected when the initial inflation pressure of the tire is 28 to 32 PSI is reduced by 5 PSI.