KR100559612B1 - Wiper system for vehicle - Google Patents

Abstract

The present invention relates to a noise reduction vehicle wiper system, and has a double blade structure that is arranged back and forth with respect to the direction of the wiper, and a blade capable of rotating back and forth so that the selected one of the two blades is in close contact with the glass surface, The blade is properly rotated at the upper and lower limit positions of the wiper by an optional magnetized electromagnet to alternately wipe the glass surface according to the wiper traveling direction one by one of the two blades, thereby causing a single blade that was a noise source of the conventional wiper blade. The present invention relates to a wiper system for a vehicle, which is capable of performing a wiping function without moving the friction surface at

According to the wiper system of the present invention, as the blade of the double blade structure is rotated by the electromagnet at the time of changing the direction of the wiper, the mounting direction of the blade is appropriately changed so that one of the two blades can perform the wiping function, It is possible to effectively reduce the noise generated when changing the direction of the conventional wiper.

Wipers, blades, double blade construction, electromagnets, ETACS, position detector, noise reduction

Description

Noise Reduction Vehicle Wiper System {Wiper system for vehicle}             

1 is a block diagram of a wiper system according to the present invention,

2 is a cross-sectional view of the wiper blade taken along the line 'A-A' in FIG. 1,

3 is a circuit diagram showing the connection state of the limit switch, etax and relay in the wiper system of the present invention,

4a and 4b is an operating state diagram showing the magnetization state of the electromagnet and the rotation state of the metal cover and the blade according to the wiper traveling direction in the wiper system of the present invention,

5 is a cross-sectional view of the blade of a conventional wiper system.

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

10: wiper motor 20: linkage system

30: pivot mechanism 40: wiper arm

50: wiper blade 51: rubber blade

52: day 53: metal cover

54: cover frame 55: hinge bracket

56a, 56b: electromagnet 60: position detecting unit

61: first limit switch 62: second limit switch

70: Etax 81, 82: relay

100: glass

The present invention relates to a noise reduction vehicle wiper system, and has a double blade structure that is arranged back and forth with respect to the direction of the wiper, and a blade capable of rotating back and forth so that the selected one of the two blades is in close contact with the glass surface, The blade is properly rotated at the upper and lower limit positions of the wiper by an optional magnetized electromagnet to alternately wipe the glass surface according to the wiper traveling direction one by one of the two blades, thereby causing a single blade that was a noise source of the conventional wiper blade. The present invention relates to a wiper system for a vehicle, which is capable of performing a wiping function without moving the friction surface at

As is well known, the most important thing for safe driving of a vehicle is to have a good forward vision.

Therefore, a typical vehicle is equipped with a wiper system that removes foreign matter attached to the windshield glass surface and cleans rain water from the glass surface during raining, in order to ensure a smooth forward view of the driver.

In such a wiper system, the rotational motion generated from the wiper motor is transferred to the wiper arm through the wiper linkage system, and the wiper blade moves the predetermined wiping section to wipe the glass by the left and right reciprocating rotation of the wiper arm. It is.

The windshield wiper system is equipped with a pivot mechanism, a wiper arm, and a wiper blade on the driver's side and the passenger's side, which operate by receiving a driving force through a linkage system from a central wiper motor.

Most wipers use this type of wiper to windshield glass. However, vans are equipped with a rear wiper system for wiping tail gate glass (or rear glass).

On the other hand, the wiper blade is a rubber material that directly contacts the glass surface to remove snow, rain water, dust, etc., and has a blade made of contact with the glass.

5 is a cross-sectional view of a conventional wiper blade. As shown in the drawing, the blade 1 has one blade 2 formed at a lower end thereof, and the blades are formed on both sides of the blade 2. The groove 3 along the longitudinal direction of 1) is formed long.

The blade 1 is to be flexibly bent in the direction opposite to the movement direction in the groove 3 when the wiper rotates left and right, which increases the friction surface with the glass on the blade (2), wherein the groove (3) serves to smoothly move the surface friction with the glass at the time when the moving direction of the blade (1) is changed.

However, in the related art, when the wiper changes direction at the upper limit position and the lower limit position of the rotation section, there is a problem that noise is generated from the blade in close contact with the glass.

This is the noise generated when the blade is bent at the upper and lower positions of the wiper and the friction surface is shifted. As a result, the noise caused by the movement of the friction surface has caused a lot of complaints from the driver. have.

Accordingly, the present invention has been invented to solve the above problems, the blade having a double blade structure that is arranged back and forth with respect to the direction of the wiper while being rotated back and forth so that the selected one of the two blades can be in close contact with the glass surface. And the blades are rotated properly at the upper and lower positions of the wiper by an electromagnet to be selectively magnetized so that one of the two blades alternately wipes the glass surface according to the wiper traveling direction, thereby providing a friction surface on a single blade. The purpose of the present invention is to provide a wiper system for a vehicle that can perform a wiping function without moving, thereby minimizing noise generation of a conventional wiper blade.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention is a blade having a double blade structure disposed two front and rear with respect to the direction of the wiper, the metal cover of the structure surrounding the upper portion other than the two blades of the blade, the portion that the wiper arm is connected and the metal cover and A cover frame rotatably supporting the assembled blade in front and rear directions of the wiper, and the cover frame is installed on both sides of the metal cover before and after the metal cover, and the blade is rotated so that one of the two blades adheres to the glass while the metal cover is attached when the power is applied. A wiper blade composed of an electromagnet to make;

A position detecting unit for detecting a wiper upper limit position and a lower limit position;

An étax for receiving a signal of the position sensing unit and determining a time point for reaching an upper limit position and a lower limit position and outputting a relay driving signal for switching the power supply states of the two electromagnets at each arrival point;

A relay for selectively applying power to the electromagnets in the respective directions by the relay drive signal output from the etax;

It includes.

In particular, the metal cover is provided in a structure surrounding the upper left portion of the blade except the two blades in a circular cross-sectional shape, the metal cover and the blade is a hinge bracket installed in the center of the upper surface in the semicircular cross-sectional structure of the cover frame It is characterized by being rotatably supported by.

In addition, the hinge bracket is characterized in that it is provided with a plurality of arranged on the length of the wiper blade.

In addition, the position detection unit is characterized in that it consists of two limit switches to be operated on the wiper arm in contact with the upper and lower position of the wiper.

Preferably, each of the limit switches is installed on the body cowl panel near the wiper pivot mechanism.

The etax can be switched so that power is applied to the electromagnet located in front of the two wiper electromagnets at the time of reaching the upper and lower positions, and the switched power applied state can be maintained until the next arrival point. It characterized in that for outputting a relay drive signal.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention, in order to minimize the noise of the blade that has occurred in the conventional wiper direction change, while having a double blade structure arranged back and forth with respect to the wiper traveling direction and rotated back and forth so that the selected one of the two blades can be in close contact with the glass surface This blade is adopted, and the blade is properly rotated at the upper and lower positions of the wiper by an electromagnet to be selectively magnetized to alternately wipe the glass surface according to the wiper traveling direction one by one of the two blades, thereby providing a conventional wiper blade. The present invention relates to a noise reduction vehicle wiper system which enables the wiping function to be performed without moving the friction surface on a single blade which caused the noise of the vehicle.

1 is a configuration diagram of a wiper system according to the present invention, Figure 2 is a cross-sectional view of the wiper blade taken along the line 'A-A' in Figure 1, Figure 3 is a limit switch, in the wiper system of the present invention This is a circuit diagram showing the connection status of the tax and relay.

Here, FIG. 1 is a wiper blade 50 to directly wipe the glass surface in the wiper system of the present invention, and receives the motor driving force through the linkage system 20 and the pivot mechanism 30 to move the wiper blade 50 The wiper arm 40 is shown, and FIG. 2 shows a cross-sectional structure of the wiper blade employed in the present invention.

In FIG. 1, reference numeral 40 denotes a wiper arm, and as a whole, a rotational motion generated in the wiper motor 10 is transmitted to the wiper arm 40 through the linkage system 20 and the pivot mechanism 30 as in the prior art. The wiper blade 50 moves the wiper section by the wiper arm 40 to wipe the glass.

In addition, in FIG. 2, reference numeral 51 denotes a blade of rubber material which is directly adhered to the surface of the glass 100 through the blade 52 to perform a wiping function. In the wiper system of the present invention, two blades 52 are provided. The blade 51 having a is adopted.

As shown in the drawing, the two blades 52 protrude in an obliquely inclined form at both the front and rear sides, that is, the left and right sides of the drawing, based on the moving direction of the wiper at the lower end of the blade 51.

In addition, the rubber blade 51 has a cover 53 (hereinafter referred to as a metal cover) made of a metal material such as iron attachable to the electromagnets 56a and 56b to be described later, except for the blade 52. Since it is provided so as to surround the remaining part, the blade 51 having two blades 52 is fitted inside the metal cover 53.

In addition, the metal cover 53 is provided in a structure surrounding the blade 51 in a circular cross-sectional shape to enable left and right rotation in the drawing in the inner space of the cover frame 54 to be described later.

The blade 51 integrally assembled with the metal cover 53 as described above is rotatably installed to expose the two blades 52 to the outside in the cover frame 54 having an inner space of a semi-circular cross-sectional structure. As described above, the hinge bracket 55 is fixedly installed at the center of the upper surface of the inner space of the cover frame 54, and the lower end of the hinge bracket 55 is formed of the metal cover 53 integrally assembled with the blade 51. It is hinged at the center of the outer surface.

The cover frame 54 is a portion to which the end of the wiper arm 40 is connected, and moves the wiping section of the glass 100 by the rotation of the wiper arm 40.

Here, the outer surface of the metal cover 53 and the inner surface of the cover frame 54 is the metal cover 53 and the blade 51 is a hinge point of the hinge bracket 55 in the cover frame 54 inner space. Spaced apart enough to be rotated about the center.

In addition, a plurality of hinge brackets 55 supporting the metal cover 53 and the blade 51 in the cover frame 54 are arranged and fixed at predetermined intervals on the length of the wiper blade 50. The wiper blades 50 may be installed at both ends and intermediate points one by one, and may be installed in a larger number at equal intervals.

In addition, the electromagnets 56a and 56b are provided on the inner surface of the cover frame 54 on both the left and right sides (front and rear in the advancing direction) of the drawing, centering on the blade 51, and among the two electromagnets 56a and 56b. When either side is magnetized, the inner metal cover 53 is attached to the magnetized electromagnet so that the entire metal cover 53 and the blade 51 rotate about the hinge bracket 55.

The two electromagnets 56a and 56b rotate the metal cover 53 and the blade 51 appropriately to the moving direction of the wiper when the wiper blade 50 reaches the upper limit position and the lower limit position, and the wiper blade. When moving in each direction of 50 serves to hold the metal cover 53 and the blade 51.

In particular, the two electromagnets 56a and 56b are magnetized by a power applied by ETAS 70, which will be described later. In actual application, the Etax 70 selectively applies power according to the wiper travel direction. By magnetizing only one of the two electromagnets 56a and 56b and alternating the electromagnets magnetized at the upper and lower positions of the wiper, the hinge bracket 55 at the time of turning the metal cover 53 and the blade 51 is changed. It will rotate around.

On the other hand, the wiper system of the present invention includes a position detecting unit 60 for detecting the upper and lower position of the wiper, in a preferred embodiment, the position detecting unit 60 is a vehicle cowl near the wiper pivot mechanism 30 It is composed of two limit switches 61 and 62 mounted on a panel (not shown) and operated on by contact of the wiper arm 40.

In more detail, the limit switches 61 and 62 are switches that are turned on by the contact of the wiper arm 40 which rotates left and right within a predetermined section, and are operated on the upper limit position of the wiper arm 40. And a first limit switch 61 for detecting the wiper upper limit position, and a second limit switch 62 for detecting the wiper lower limit position by being operated on at the lower limit position of the wiper arm 40.

Here, in the case of using a mechanical limit switch as each of the limit switches 61 and 62, since the damping action can be performed by a spring force in which a normal mechanical limit switch is incorporated, each mechanical limit switch can be used as a wiper arm. It can also act as a buffer against sudden speed changes.

On the other hand, the present invention receives the signal output from the position detection unit 60 determines the time when the wiper reaches the upper limit position and the lower limit position and at each time of arrival of the two electromagnets (56a, 56b) The battery power is selectively applied to the respective electromagnets 56a and 56b by the Etax 70 which outputs the relay drive signal for switching the power supply state and the relay drive signal output from the Etax 70. Relays (81, 82).

Herein, the two limit switches 61 and 62 are used for the selective driving of the electromagnets 56a and 56b according to the wiper travel direction in the on state of the witax switch (not shown). Determining the upper and lower limit position of the wiper by receiving the signal of the, and determine the direction of the wiper from the direction of the wiper, by applying power to any one of the two electromagnets (56a, 56b) according to the direction of the wiper, The relays 81 and 82 on the electromagnets 56a and 56b are kept on during the wiper process.

That is, the Etax 70 switches the direction of the power applied to the two electromagnets 56a and 56b by appropriately turning on / off each relay 81 and 82 when the wiper changes direction. In the state where the coil side of the relays 81 and 82 of the electromagnets 56a and 56b is excited and turned on, the coil side of the relays 81 and 82 is continuously excited until the next direction change point. The driving states of the 56a and 56b are maintained.

The relays 81 and 82 operate on by the excitation current output from the etax 70 to apply battery power to the corresponding electromagnets 56a and 56b of the wiper blade 50. In the wiper system of the present invention, since the electromagnets 56a and 56b are installed in the cover frame 54 of the wiper blade 50 before and after the blade 51 (based on the wiper traveling direction), Two relays 81 and 82 are provided for each of the electromagnets 56a and 56b.

Hereinafter, with reference to the accompanying drawings, the operating state of the present invention will be described.

4A and 4B are diagrams illustrating a magnetization state of an electromagnet and a rotation state of a metal cover and a blade according to a wiper advancing direction in the wiper system of the present invention, and as shown, an electromagnet positioned in front of the wiper advancing direction 56a and 56b are magnetized, and the metal cover 53 is attached to the magnetized electromagnets 56a and 56b so that the blade 51 of the double blade structure rotates in the cover frame 54.

First, FIG. 4A shows a state when the wiper is moved forward (the wiper moves from the lower limit position to the upper limit position), and in this case, the electromagnet 56b on the right side of the blade 51 is magnetized by receiving power. While the metal cover 53 is attached to the 56b, the blade 51 is rotated counterclockwise in the drawing about the hinge bracket 54.

As a result, one of the two blades 52 positioned in the rear of the wiper traveling direction is in close contact with the surface of the glass 100 to perform wiping.

Thereafter, when the wiper arm 40 reaches the upper limit position, the switch terminal of the first limit switch 61 is pressed on by the wiper arm 40 having reached the upper limit position. The tax 70 receives the on signal of the first limit switch 61 to sense the arrival of the upper limit position of the wiper.

At the same time, the Etax 70 turns on the relay 82 on the opposite side of the electromagnet 56a while turning off the relay 81 held on during the advancement.

Of course, the Etax 70 flows an excitation current to the coil side of the relay 82 to turn on the relay 82, and the relay on state is then changed during the return of the wiper (the wiper moves from the upper limit position to the lower limit position). It keeps flowing excitation current.

As described above, when the opposite relay 82 is turned on, the battery power is magnetized by the electromagnet on the left side of the blade 51 (the electromagnet located at the front of the wiper traveling direction) 56A applied thereto, and FIG. 4B. As in, as the metal cover 53 is attached to the magnetized electromagnet 56a, the blade 51 is rotated clockwise in the drawing about the hinge bracket 55.

As a result, the edge of the two blades 52 (the blades positioned to the rear side of the wiper traveling direction) is in close contact with the surface of the glass 100 to perform wiping.

On the other hand, when the wiper arm 40 reaches the lower limit position again, the switch terminal of the second limit switch 62 is pressed on by the wiper arm 40 having reached the lower limit position, and at this time, The tax 70 receives the ON signal of the second limit switch 62 to sense the arrival of the lower limit position of the wiper.

At the same time, the Etax 70 turns on the relay 81 on the opposite side of the electromagnet 56b while turning off the relay 82 held on during the return.

Of course, the Etax 70 maintains this relay on state by continuously exciting the current during the advancement of the wiper.

Afterwards, the wiper advances as described with reference to FIG. 4A, and as a result, the states of FIGS. 4A and 4B are repeated alternately during the wiper operation.

As described above, according to the vehicle wiper system according to the present invention, the blade mounting of the blade so that one of the two blades to perform the wiping function while the blade of the dual blade structure is rotated by the electromagnet at the time of changing the direction of the wiper By changing the direction appropriately, it is possible to effectively reduce the noise generated at the time of changing the direction of the conventional wiper.

Claims (6)

Blade having a double blade structure in which two blades are arranged back and forth with respect to the direction of the wiper, a metal cover having a structure surrounding the upper rest except for the two blades of the blade, a portion where the wiper arm is connected, and the metal cover and the integrated blade It is composed of a cover frame for rotatably supporting the front and rear direction of the wiper, and an electromagnet for rotating the blade so that one of the two blades is in close contact with the glass while the metal cover is attached to both sides of the cover frame before and after the metal cover. A wiper blade; A position detecting unit for detecting a wiper upper limit position and a lower limit position; An étax for receiving a signal of the position sensing unit and determining a time point for reaching an upper limit position and a lower limit position and outputting a relay driving signal for switching the power supply states of the two electromagnets at each arrival point; A relay for selectively applying power to the electromagnets in the respective directions by the relay drive signal output from the etax; Noise reduction vehicle wiper system comprising a. The method according to claim 1, The metal cover is provided with a structure surrounding the upper left portion of the blade except the two blades in a circular cross-sectional shape, the metal cover and the blade by a hinge bracket installed in the center of the upper surface in the semicircular cross-sectional structure of the cover frame A noise reduction vehicle wiper system, which is rotatably supported. The method according to claim 2, The hinge bracket is a noise reduction vehicle wiper system, characterized in that provided with a plurality of arranged on the length of the wiper blade. The method according to claim 1, And the position detecting unit comprises two limit switches which are on-operated while the wiper arms contact each other at the upper and lower wiper positions of the wiper system. The method according to claim 4, And each of the limit switches is installed on a vehicle cowl panel near a wiper pivot mechanism. The method according to claim 1, The etax, Relay drive for switching the power to be applied to the electromagnet located at the front of the two wiper electromagnets at the time of reaching the upper limit and the lower limit and maintaining the switched power supply state until the next arrival point. Noise reduction vehicle wiper system for outputting a signal.

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