KR20040024091A - Waterproof structure for a vent hole for a horn - Google Patents

Abstract

PURPOSE: A waterproof structure of a vent hole of a horn is provided to prevent damages of parts for the horn caused by flowing water or foreign materials into the horn by mounting a water inflow preventing device for opening and closing the vent hole to pressure change in the horn, to improve durability and operation reliability, to minimize breakdown caused by external shock by simplifying the waterproof structure of the vent hole, and to reduce manufacturing cost. CONSTITUTION: In a horn of a vehicle having a casing(100) at which a vent hole(110) is formed and a diaphragm supported to the casing to vibrate to applied electric currents, a waterproof structure of the vent hole of the horn is composed of a hollow body unit(120) fixed to an outer opening unit of the casing at which the vent hole is formed and a water inflow preventing part(130) mounted in the body unit and movably inserted into the vent hole to open and close the vent hole to the pressure change in the casing. The body unit has a ventilating hole(121) for communicating with the vent hole. An airtight pad(122) is formed at the outer opening unit of the casing contacted with the water inflow preventing part.

Description

Waterproof structure for a vent hole for a horn}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horn of a vehicle, and more particularly, to a waterproof structure of a vent hole of a horn which can prevent the inflow of moisture into the horn and prevent corrosion of internal components.

In general, a vehicle is equipped with a horn to warn other vehicles or pedestrians of the vehicle's driving status. The horn includes an air type that vibrates the diaphragm by compressed air and makes an electric sound, and an electric type that operates the diaphragm by an electromagnet. Pneumatic type is widely used in large vehicles that can easily use compressed air, and electric type is used in general small vehicles.

The electric horn vibrates the metal diaphragm by an electromagnet so that a warning sound is generated.

1 is a cross-sectional view of a horn having a conventional waterproof vent hole.

Referring to FIG. 1, a conventional electric horn includes a casing 10 fixed to a vehicle body by a holder 11; The diaphragm 21 and the vibrator 20 provided in the casing 10 are vibrated by the vibrator 20 to generate a warning sound.

The casing 10 is provided with a vent hole to allow air to enter and exit the outside of the vibration plate 21.

As shown in FIG. 2, the vent hole is bent and fixed so that the opening end of the fixing piece 40 is directed downward through the elastic thin film 30.

Thus, the operation of the vent hole structure of the conventional horn configured as follows.

By vibrating the diaphragm 21 fixed to the casing 10 when the horn is in operation, the elastic thin film 30 contracts and expands in and out as shown by a dotted line and air flows into and out of the casing 10. You get the same effect as the flow.

At this time, the elastic thin film 30 prevents moisture or foreign matter from being sucked through the vent hole to prevent corrosion of internal parts such as contacts or diaphragms.

However, the conventional vent hole structure configured as described above uses an elastic thin film that shrinks and expands, and thus, when the temperature or humidity is excessively changed or an impact occurs, the vent hole structure may be easily damaged and lose its function.

In addition, since the fixed piece 40 that is bent and mounted needs a constant mounting space to the rear of the horn, interference with other components may occur, and in particular, due to vibration of the horn itself, interference with other components may occur. There is a problem.

The present invention is to solve the above drawbacks, to prevent the inflow of moisture and foreign matter into the vent hole when the horn is operating, to provide a waterproof structure of the horn horn hole excellent in durability.

1 is a cross-sectional view of a horn having a conventional waterproof vent hole,

2 is an enlarged view of a portion A of FIG. 1;

3 and 4 is a waterproof structure of the vent hole of the horn according to the present invention

Showing drawings.

<Explanation of symbols for the main parts of the drawings>

100 casing 110 vent hole

120: body 121: ventilation hole

122: airtight pad 130: moisture inflow prevention unit

The waterproof structure of the horn vent hole of the present invention includes a casing having a vent hole and a diaphragm supported by the casing and vibrating according to an applied current, wherein the outer opening end of the casing having the vent hole is formed at the outer end of the casing. A hollow body part having a ventilation hole formed therein so as to communicate with the vent hole is fixed, and in the body part is inserted into the vent hole to open and close the vent hole in accordance with the pressure change inside the casing to prevent water inflow Achievement is made up of negative parts.

3 and 4 is a view showing the waterproof structure of the vent hole of the horn according to the present invention.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The waterproof structure of the horn vent hole of the present invention includes a casing 100 having a vent hole 110 and a diaphragm supported by the casing 100 and vibrating according to an applied current. A hollow body portion 120 having a ventilation hole 121 formed therein is fixed to an outer opening end of the casing 100 in which the 110 is formed, and in the body portion 120. Technical features are characterized in that the water inlet prevention unit 130 is inserted into the vent hole 110 so as to be able to flow to open and close the vent hole 110 in accordance with the pressure change inside the casing (100). .

The water inflow prevention part 130 is the first plate 131 positioned inside the vent hole 110 and the second plate 132 positioned outside the vent hole 110 to open and close the vent hole 110. And a third plate 133 provided in the body part 120 at a predetermined distance from the second plate 132, and include first, second, and third plates 131, 132, and 133. ) May be integrally formed by the shaft 134 parallel to each other.

In addition, an airtight pad 122 is further configured between the second plate 132 of the moisture inflow preventing part 130 and the body part 120 coming into contact with the second plate 132. When the plate 132 and the body portion 120 are in close contact with each other, the airtightness can be improved. The hermetic pad can be provided fixed to only one of the body portion 120 or the second plate 132, or can be provided on both sides.

At the outer opening end of the vent hole 110 of the casing 100, the moisture inflow prevention part 130 according to the present invention may be fastened by a bolt and a nut, or fixed by a rivet 101.

Looking at the action of the waterproof structure of the horn vent hole of the present invention configured as described above are as follows.

When the horn vibrates and the diaphragm fixed to the casing 100 vibrates, compression and expansion occur repeatedly inside the horn.

In particular, when the outside water is introduced when the inside of the horn is expanded, as shown in FIG. 3, the water inflow prevention part 130 moves to the left side according to the pressure difference between the inside and the horn, so that the second plate 132 is moved. In close contact with the airtight pad 122, water is prevented from flowing into the horn from the outside.

Next, when the inside of the horn is contracted, as the water inflow prevention part 130 moves to the right side as shown in FIG. 4 according to the pressure difference between the inside and the horn of the horn, the second plate 132 is closed at the airtight pad 122. As it falls, the vent hole 110 is opened to exhaust the air inside the horn.

The waterproof structure of the horn vent hole of the present invention as described above has a water inflow prevention means for opening and closing the vent hole according to the pressure change inside the horn, thereby preventing water or other foreign substances from entering the horn and damaging the horn component. And operating reliability. In addition, by simplifying the waterproof structure of the vent hole as compared with the prior art, it is possible to minimize the damage caused by external impact, it is an invention that can expect the effect of cost reduction and the like.

Claims (2)

In a horn of a vehicle including a casing having a vent hole and a diaphragm supported by the casing and vibrating according to an applied current, A hollow body part having a ventilation hole is fixed to an outer opening end of the casing having the vent hole formed therein so as to communicate with the vent hole. The body portion is a waterproof structure of the horn vent hole, characterized in that the moisture inlet prevention portion is provided to be inserted into the vent hole to be able to flow in order to open and close the vent hole in accordance with the pressure change inside the casing. The waterproof structure of a horn vent hole according to claim 1, wherein an airtight pad is further configured at an outer opening end of the casing in contact with the moisture inflow preventing part.