JPH08310347A - Wiper device - Google Patents

Abstract

PURPOSE: To prevent a wiper from stopping on a wiping face and to stop the wiper in the predetermined position when it is not used by stopping the wiper after continuing operation of the wiper to the predetermined stopping position even if an ignition switch is turned off during the operation of the wiper. CONSTITUTION: A wiper device 1 is provided with a relay coil RL1 in which one end is connected to an accessory power source while the other end is connected to the ground, a relay normally close relay RL 3 connected to the first switch terminal P in a wiper switch 2, a relay movable contact RL2 connected to the third switch terminal E in the wiper switch 2, and a switching relay RL provided with a relay normally open contact RL4 connected to the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiper device used to wipe a glass surface by operating a wiper, and more particularly, it keeps operating the wiper to a predetermined stop position even when the wiper switch is turned off. The present invention relates to a wiper device.

[0002]

2. Description of the Related Art As a wiper device which continues to operate a wiper to a predetermined stop position even when a wiper switch is turned off, for example, a device disclosed in Japanese Utility Model Laid-Open No. 55-48541 is known.

In the wiper device disclosed in the above publication, when the wiper switch is turned off while the wiper is operating,
Current is supplied to the wiper motor until the wiper comes to the fixed position, and when the wiper comes to the fixed position, the current supply to the wiper motor is stopped and the wiper is stopped at the predetermined position.

[0004]

However, when the vehicle is parked in the conventional wiper device as described above,
If the ignition switch is turned off while the wiper is operating, the wiper motor is connected to the power supply via the ignition switch, so the current from the power supply is not supplied and the wiper is stopped arbitrarily on the wiping surface. When the vehicle is parked with the wiper stopped on the surface to be wiped, the wiper is placed in the stop position when the vehicle starts after that even though the wiper switch is switched off at the same time as the ignition switch is switched on. It is good if you park in the garage when it rains and then start when it rains, but if you park in the garage when it rains and then start when it is sunny, the wiper will be It may be necessary to operate and wipe the wiper dry, which may contaminate the wiping surface. Before switching off the ignition switch, the wiper switch was switched off, and after confirming that the wiper had stopped at the specified stop position, the ignition switch was switched off. Therefore, it has been a problem to solve the above problems.

[0005]

It is an object of the present invention to provide a wiper device according to the present invention, even if the ignition switch is turned off while the wiper is operating, the wiper is continuously operated to a predetermined stop position and then stopped to stop the wiper on the wiping surface. First, it is an object of the present invention to provide a wiper device that can stop the wiper at a predetermined position when not in use.

[0006]

Configuration of the Invention

[0007]

A wiper device according to a first aspect of the present invention includes a power source and a first switch terminal and a second switch terminal which are respectively connected by being switched to an off position. At the same time, a wiper switch having a third switch terminal connected to the second switch terminal by being switched to the ON position and a first brush terminal connected to the power source and a second switch terminal of the wiper switch A wiper motor having a second brush terminal connected thereto, the output shaft for operating the wiper rotating by energizing both brush terminals, a movable contact connected to the first switch terminal of the wiper switch, and a power supply. A first contact connected to the
And the movable contact is connected to the second contact while the wiper is operating in conjunction with the output shaft of the wiper motor, and the movable contact is connected to the first contact when the wiper reaches a predetermined stop position. It is possible to switch between the auto stop switch and the off position and the accessory position.When switched from the off position to the accessory position, the accessory terminal is connected to the power terminal connected to the power supply, and the current is supplied from the power source to the accessory terminal. Ignition switch,
One end is connected to the accessory terminal of the ignition switch, the other end is connected to the grounded relay coil, the relay normally closed contact connected to the first switch terminal of the wiper switch, and the third switch terminal of the wiper switch. And a switching relay having a relay movable contact and a grounded normally open contact.

In the wiper device according to the second aspect of the present invention, the wiper switch has a fourth switch terminal connected to the third switch terminal when the wiper switch is switched to the washer position, and one brush terminal is connected to the power source. The other brush terminal is connected to the fourth switch terminal of the wiper switch, and a washer motor for ejecting the cleaning liquid by energizing both brush terminals is provided.

[0009]

In the wiper device according to the first aspect of the present invention, when the ignition switch is on,
In the switching relay, the relay coil is excited, the relay movable contact is switched from the relay normally closed contact to the relay normally open contact, and then the wiper switch is switched to the ON position, so that the second switch terminal of the wiper switch is grounded. Is formed to form an energization path from the power supply to the wiper motor. When the ignition switch is turned off while the wiper switch is switched to the on position, the switching relay demagnetizes the relay coil and the movable relay contact returns from the relay normally open contact to the relay normally closed contact. While the movable contact of is switched to the second contact, the energized path of the wiper motor remains in the formed state, and then the movable contact of the auto stop switch returns to the first contact and at the same time the energized path of the wiper motor is cut off. Then, the operation of the wiper motor is stopped. Therefore, even after the ignition switch is cut off, the wiper continues to operate until the wiper reaches the predetermined stop position, and the wiper stops when the wiper reaches the predetermined stop position, so the ignition switch is cut off. At the same time, the operation of the wiper is not stopped.

In the wiper device according to the second aspect of the present invention, when the wiper switch is switched to the washer position, the current of the power source is supplied from one brush terminal to the other brush terminal to inject the cleaning liquid. When the ignition switch is turned on, the relay coil of the switching relay is excited, and the relay movable contact switches from the relay normally closed contact to the relay normally open contact. By switching the wiper switch to the ON position, a ground circuit is formed at the second switch terminal of the wiper switch, and a power supply path from the power supply to the wiper motor is formed. When the ignition switch is turned off while the wiper switch is still switched to the on position, the relay coil of the switching relay is demagnetized and the relay movable contact returns from the relay normally open contact to the relay normally closed contact. However, while the movable contact of the auto stop switch is switched to the second contact, the energization path of the wiper motor continues to be formed, and at the same time when the movable contact of the auto stop switch returns to the first contact, the energization path of the wiper motor is cut off. Therefore, even after the ignition switch is cut off, the wiper continues to operate until the wiper reaches the predetermined stop position, and the wiper stops when the wiper reaches the predetermined stop position. Therefore, the operation of the wiper is not stopped at the same time that the ignition switch is cut off.

[0011]

1 and 2 show an embodiment of a wiper device according to the present invention, FIG. 1 shows a first embodiment of a wiper device according to the present invention, and FIG. A second embodiment of a wiper device according to the invention is shown.

The wiper device 1 shown in FIG. 1 mainly includes a wiper switch 2, a wiper motor 3, an auto stop switch 4, a switching relay RL, an ignition switch 5, a washer motor 6, and a power source 50.

The wiper switch 2 has a first switch terminal P, a second switch terminal L, a third switch terminal E,
A fourth switch terminal W is provided respectively, and when the wiper switch 2 is switched to the off position (OFF), the first switch terminal P and the second switch terminal L are provided.
Is connected to the third switch terminal E when it is switched to the ON position (ON) and the third switch terminal E is connected to the second switch terminal L, and the fourth switch is connected to the third switch terminal E when switched to the washer position (WA). The terminal W is connected.

The ignition switch 5 includes a power supply terminal B, an accessory terminal ACC, an ignition terminal IG,
Each of the starter terminals ST is provided, and the power source terminal B is directly connected to the power source 50. When the ignition switch 5 is switched from the off position (OFF) to the accessory position (ACC), no terminals are connected in the off position (OFF) and the accessory terminal ACC is connected to the power supply terminal B and the voltage is applied to the terminal ACC. Occurs from the accessory position (ACC) to the ignition position (I
G), power supply terminal B and accessory terminal A
CC and the ignition terminal IG are connected to generate a voltage also at the ignition terminal IG, and the ignition position (I
When the position is switched from G) to the start position (ST), the power supply terminal B is connected to the ignition terminal IG and the starter terminal ST, and a voltage is generated at the starter terminal ST.

Since the ignition switch 5 is attached to the ignition key cylinder of the vehicle, when the key is inserted into the ignition key cylinder and then rotated in a predetermined direction, the ignition switch 5 is turned off (OFF),
Accessory position (ACC), ignition position (I
G) and the ignition position (I
From G) to the start position (ST), it is rotated against a return spring (not shown), and automatically returns from the start position (ST) to the ignition position (IG).

On the other hand, the wiper motor 3 is provided with a first brush terminal 3a, a second brush terminal 3b and an output shaft 3c.

Since the first brush terminal 3a is directly connected to the power source 50 and the second brush terminal 3b is connected to the second switch terminal L of the wiper switch 2, the second switch terminal of the wiper switch 2 is connected. When L is grounded, the output shaft 3c rotates. Since the output shaft 3c is connected to a wiper blade (not shown) via a link, the wiper blade wipes the wiping surface as the output shaft 3c rotates. Auto stop switch 4 for wiper motor 3
Is installed.

The automatic stop switch 4 is provided with a movable contact 4a, a normally closed contact (first contact) 4b, and a normally open contact (second contact) 4c.

The movable contact 4a is the output shaft 3 of the wiper motor 3.
Since the wiper motor 3 is coupled to c, it operates with rotation of the output shaft 3c while the wiper motor 3 is rotating, and is electrically connected to the normally closed contact 4b when the wiper is at a predetermined stop position, While the wiper is not at the predetermined stop position, it is electrically connected to the normally open contact 4c.

The normally closed contact 4b is directly connected to the power source 50,
The normally open contact 4c is grounded.

In the automatic stop switch 4, when the wiper switch 2 is switched from the on position (ON) to the off position (OFF), if the wiper is not in the predetermined stop position, the movable contact 4a becomes the normally open contact 4c. By being connected, the first switch terminal P of the wiper switch 2 is grounded to form an energization path of the power source 50 with respect to both brush terminals 3a and 3b of the wiper motor 3, and the wiper is stopped at a predetermined lower position to a predetermined stop position. When it comes to the position, the movable contact 4a returns from the normally open contact 4c to the normally closed contact 4b to connect the first switch terminal P of the wiper switch 2 to the power source 50, and to connect the brush terminals 3a and 3b of the wiper motor 3 to each other. The output shaft 3c is forcibly stopped by electromagnetic braking by short-circuiting.

In addition, the switching relay RL is provided with a relay coil RL1, a relay movable contact RL2, a relay normally closed contact RL3, and a relay normally open contact RL4.

Relay coil R of switching relay RL
Since L1 has one end connected to the accessory terminal ACC of the ignition switch 5 and the other end grounded, the relay coil RL1 is such that the ignition switch 5 is switched from the off position (OFF) to the accessory position (ACC). The ignition switch 5 is continuously excited by being switched from the accessory position (ACC) to the ignition position (IG).
When the ignition switch 5 is switched from the ignition position (IG) to the start position (ST), no current is supplied and it is demagnetized. Even when the ignition switch 5 is switched to the off position (OFF), it is demagnetized.

Since the relay movable contact RL2 of the switching relay RL is connected to the third switch terminal E of the wiper switch 2, the ignition switch 5 is switched to the accessory position (ACC) and the relay coil RL1.
Is excited, it has a function of switching from the relay normally closed contact RL3 to the relay normally open contact RL4 to ground the third switch terminal E of the wiper switch 2. When the relay coil RL1 is demagnetized because the current is not supplied from the ignition switch 5 to the relay coil RL1, the relay movable contact RL2 is relay normally open contact RL4.
To the relay normally closed contact RL3 to connect the third switch terminal E of the wiper switch 2 to the movable contact 4a of the auto stop switch 4, so that the auto stop switch 4 is entrusted with the formation of an energization path for the wiper motor 3. .

In addition, the washer motor 6 is provided with a first brush terminal 6a serving as one brush terminal, a second brush terminal 6b serving as the other brush terminal, and an output shaft 6c.

The first brush terminal 6 of the washer motor 6
Similarly to the wiper motor 3, a is directly connected to the power source 50, and the second brush terminal 6b of the washer motor 6 is connected to the fourth switch terminal W of the wiper switch 2, so that the fourth brush terminal of the wiper switch 2 is connected. When the switch terminal W is grounded, the output shaft 6c rotates. The output shaft 6c is connected to a pump (not shown), and since this pump is arranged in the cleaning liquid stored in the washer tank, the cleaning liquid is sprayed from the nozzle to the wiping surface by the rotation of the output shaft 6c.

The wiper device 1 having such a structure is turned in a predetermined direction after the key is inserted into the ignition key cylinder, and is turned off (OFF), accessory position (ACC), ignition position (IG), start. The position is switched to the position (ST), and the starter motor (not shown) is rotated to start the engine of the vehicle and then return to the ignition position (IG). When the ignition switch 5 is moved to the accessory position (ACC) or the ignition position (IG), the accessory power supply is generated and the relay coil RL1 of the switching relay RL is excited, so that the relay movable contact RL2 of the switching relay RL is normally operated. The closed contact RL3 is switched to the relay normally open contact RL4, and the third switch terminal E of the wiper switch 2 is grounded.

When the wiper switch 2 is switched from the off position (OFF) to the on position (ON), the second switch terminal L of the wiper switch 2 is connected to the third switch terminal E, and the third switch terminal E is connected. Is a switching relay R
Since it is grounded via the L relay movable contact RL2, the wiper motor 3 has the second brush terminal 3b, the second switch terminal L of the wiper switch 2, the third switch terminal E of the wiper switch 2, and the switching. Power source 5 via relay movable contact RL2 of relay RL2 and the energization path of ground
Since a current of 0 flows and the output shaft 3c starts rotating, the wiper is operated to wipe the wiping surface.

At this time, when the wiper switch 2 is switched to the washer position (WA), the fourth switch terminal W of the wiper switch 2 is grounded to output the output shaft 6
By rotating c and the output shaft 6c, the cleaning liquid is sprayed from the nozzle onto the wiping surface.

In this state, when the wiper switch 2 is switched to the off position (OFF), the first wiper switch 2
The switch terminal P of is connected to the second switch terminal L of
Since the movable contact 4a of the auto stop switch 4 is grounded via the normally open contact 4c while the wiper is not in the predetermined stop position, the movable contact of the automatic stop switch 4 is connected to the first switch terminal P of the wiper switch 2. 4a, the normally-open contact 4c of the automatic stop switch 4, and a grounded energization path are formed to continue energizing the wiper motor 3 until the wiper reaches a predetermined stop position, and the wiper comes to the predetermined stop position. At the same time that the movable contact 4a of the auto stop switch 4 is separated from the normally open contact 4c and connected to the normally closed contact 4b, the grounding energization path for the first switch terminal P of the wiper switch 2 is interrupted, and the wiper is set in advance. The rotation of the output shaft 3c of the wiper motor 3 is stopped at the stop position. Therefore, when the wiper switch 2 is switched to the off position (OFF), the wiper is operated to a predetermined stop position and stopped.

Then, the wiper switch 2 is turned on (O
N), the vehicle is parked and the ignition switch 5 is switched to the off position (OFF) while the wiper is still operating, so that no current is supplied to the relay coil RL1 from the accessory terminal ACC of the ignition switch 5. , Switching relay RL relay coil RL
1 is demagnetized, and the relay movable contact RL2 is separated from the relay normally open contact RL4 and connected to the normally closed contact RL3.

At this time, since the wiper switch 2 is switched to the ON position (ON), the third switch terminal E is connected to the movable contact 4a of the automatic stop switch 4 via the relay movable contact RL2 of the switching relay RL. It The movable contact 4a of the auto stop switch 4 is a normally open contact 4c while the wiper is not in the predetermined stop position.
Since it is grounded via the
Of the switching relay RL, the relay movable contact RL2 of the switching relay RL, the relay normally closed contact RL3, and the movable contact 4 of the auto stop switch 4
a, the normally-open contact 4c of the auto stop switch 4 and the energization path for grounding are formed to continue energizing the wiper motor 3, the wiper motor 3 continues to operate until the wiper reaches a predetermined stop position, and the wiper is predetermined. In the stop position, the movable contact 4a of the auto stop switch 4 is separated from the normally open contact 4c and connected to the normally closed contact 4b, and at the same time, the energization path for grounding the third switch terminal E of the wiper switch 2 is cut off. The rotation of the output shaft 3c of the wiper motor 3 is stopped when the wiper reaches a predetermined stop position.

Even if the ignition switch 5 is switched to the off position (OFF) while the wiper switch 2 is still in the on position (ON), the wiper motor 3 is not stopped at the same time when the ignition switch 5 is switched off, and the wiper is set in advance. The energization path for the wiper motor 3 is continuously formed until the wiper motor 3 reaches the predetermined stop position, and the energization path for the wiper motor 3 is cut off when the wiper reaches the predetermined stop position.

In the wiper device 1 according to the second embodiment of the present invention shown in FIG. 2, one end of the relay coil RL1 of the switching relay RL has an ignition switch 5 at one end.
Connected to the ignition terminal IG and the other end is grounded. When the ignition switch 5 is switched from the off position (OFF) to the accessory position (ACC), the accessory terminal ACC is connected to the power supply terminal B and the accessory position ( When the ACC) is switched to the ignition position (IG), the power supply terminal B is connected to the accessory terminal ACC and the ignition terminal IG.

In this case, the relay coil RL1 of the switching relay RL is not excited even when the accessory power supply is generated by switching the ignition switch 5 from the off position (OFF) to the accessory position (ACC), and the ignition switch 5 Is excited by switching from the accessory position (ACC) to the ignition position (IG), demagnetized when the ignition switch 5 is switched from the ignition position (IG) to the start position (ST), and the ignition switch 5 is turned off (OFF). ), It will be demagnetized.

In the wiper device 1 in this case, even if the ignition switch 5 is switched to the accessory position (ACC), the relay coil RL1 of the switching relay RL is not excited and the ignition switch 5 is switched from the accessory position (ACC) to the ignition position. When it is switched to the position (IG), the relay movable contact RL2 of the switching relay RL is switched from the relay normally closed contact RL3 to the relay normally open contact RL4 to ground the third switch terminal E of the wiper switch 2 and thus the ignition switch. The timing at which the relay coil RL is excited while the switch 5 is switched from the off position (OFF) to the ignition position (IG) is later than in the first embodiment, and the ignition switch 5 is switched from the ignition position (IG) to the off position (OFF). While being returned until Timing coil RL1 is demagnetized becomes faster than the first embodiment.

Also in this case, even if the wiper switch 2 is in the ON position (ON) and the ignition switch 5 is switched to the OFF position (OFF), the ignition switch 5
The wiper motor 3 is not stopped at the same time when the wiper motor 3 is turned off, and the energization path for the wiper motor 3 is continuously formed until the wiper reaches the predetermined stop position, and when the wiper reaches the predetermined stop position, the energization path for the wiper motor 3 is cut off. It will be done.

[0038]

As described above, according to the wiper device according to the first aspect of the present invention, when the ignition switch is in the ON state, the relay coil of the switching relay is excited and the relay movable contact is turned on. The relay normally-closed contact is switched to the relay normally-open contact, and then the wiper switch is switched to the ON position to form an earth circuit at the second switch terminal of the wiper switch, thereby forming an energization path from the power source to the wiper motor. It When the ignition switch is turned off while the wiper switch is switched to the on position, the relay relay coil of the switching relay is demagnetized, and the relay movable contact returns from the relay normally open contact to the relay normally closed contact. While the movable contact of the switch is switched to the second contact, the energized path of the wiper motor remains in the formed state, and then the movable contact of the auto stop switch returns to the first contact and at the same time the energized path of the wiper motor is changed. Since the wiper motor is stopped and the operation of the wiper motor is stopped, the wiper continues to operate after the ignition switch is cut off until the wiper reaches the predetermined stop position, and the wiper stops when the wiper reaches the predetermined stop position. In order to prevent the Does not stop, and even if the power is cut off while the wiper is operating, the wiper continues to operate to the specified stop position and then stops.The wiper does not stop on the wiping surface, and the wiper does not stop when not in use. There is an excellent effect that the can be stopped at a predetermined position.

According to the wiper device of the second aspect of the present invention, when the wiper switch is switched to the washer position, the current of the power source is supplied from one brush terminal to the other brush terminal to inject the cleaning liquid. When the ignition switch is turned on, the relay coil of the switching relay is excited, and the relay movable contact switches from the relay normally closed contact to the relay normally open contact. By switching the wiper switch to the ON position, a ground circuit is formed at the second switch terminal of the wiper switch, and a power supply path from the power supply to the wiper motor is formed. When the ignition switch is turned off while the wiper switch is still switched to the on position, the relay coil of the switching relay is demagnetized and the relay movable contact returns from the relay normally open contact to the relay normally closed contact. However, while the movable contact of the auto stop switch is switched to the second contact, the energization path of the wiper motor continues to be formed, and at the same time when the movable contact of the auto stop switch returns to the first contact, the energization path of the wiper motor is cut off. Therefore, even after the ignition switch is cut off, the wiper continues to operate until the wiper reaches the predetermined stop position, and when the wiper reaches the predetermined stop position, the wiper stops, so the ignition switch is cut off. At the same time, the operation of the wiper is not stopped, and even if the power is cut off while the wiper is operating, the wiper continues to operate to the specified stop position and then stops, stopping the wiper on the wiping surface. Therefore, the wiper can be stopped at a predetermined position when it is not used.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a first embodiment of a wiper device according to the present invention.

FIG. 2 is a circuit diagram of a wiper device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 wiper device 2 wiper switch 3 wiper motor 3a first brush terminal 3b second brush terminal 3c output shaft 4 auto stop switch 4a movable contact 4b normally closed contact (first contact) 4c normally open contact (second contact) 5 Ignition switch 6 Washer motor 6a One brush terminal 6b Other brush terminal 50 Power supply ACC Accessory terminal B Power supply terminal E Third switch terminal IG Ignition terminal L Second switch terminal P First switch terminal RL Switching relay RL1 Relay coil RL2 Relay movable contact RL3 Relay normally closed contact RL4 Relay normally open contact ST Starter terminal W Fourth switch terminal

Claims (2)

[Claims] 1. A power supply and a first switch terminal and a second switch terminal, which are respectively connected by being switched to an off position, and are provided at the second switch terminal by being switched to an on position. A wiper switch having a third switch terminal to be connected, a first brush terminal connected to the power source, and a second brush terminal connected to a second switch terminal of the wiper switch, By energizing the brush terminal,
A wiper motor having an output shaft for operating the wiper, a movable contact connected to the first switch terminal of the wiper switch, a first contact connected to the power supply, and a second contact grounded. And the movable contact is connected to the second contact while the wiper is operating in conjunction with the output shaft of the wiper motor, and the movable contact causes the movable contact to move to the first contact when the wiper reaches a predetermined stop position. The auto stop switch connected to the contact can be switched between the OFF position and the accessory position. When the OFF position is switched to the accessory position, the accessory terminal is connected to the power supply terminal connected to the power source, and the power supply is connected to the accessory terminal. Ignition switch that is supplied with current, and one end connected to the accessory terminal of the ignition switch, and the other end grounded. A relay coil, a relay normally closed contact connected to the first switch terminal of the wiper switch, a relay movable contact connected to the third switch terminal of the wiper switch, and a grounded relay normally open contact. A wiper device having a switching relay provided with. 2. The wiper switch includes a fourth switch terminal connected to a third switch terminal when the wiper switch is switched to the washer position, one brush terminal is connected to a power source, and the other brush terminal is the wiper switch. 2. The wiper device according to claim 1, further comprising a washer motor that is connected to the fourth switch terminal of FIG. 1 and that injects a cleaning liquid by energizing both brush terminals.