JP6482140B2 - Wiper device - Google Patents

Description

  The present invention relates to a wiper device.

  A vehicle such as an automobile is provided with a wiper for wiping dirt on windows, raindrops, and the like. As a wiper device having such a configuration, there is a wiper device that switches the driving speed of a wiper motor to stop, high-speed driving, low-speed driving, and the like by switching the contact of a switch unit (for example, see Patent Document 1).

  The wiper device includes a switch unit and a wiper motor. When the switch unit is turned on, the wiper motor is driven and the pivot shaft is rotated. This switch section has “+ B terminal”, “S terminal”, “+1 terminal”, and “+2 terminal”, and “+ B terminal” is connected to the positive electrode of the vehicle battery. For example, when the driver operates the switch unit to bring the “+1 terminal” and the “+ B terminal” into a connected state, current is supplied from the battery to the wiper motor to drive the wiper arm at a low speed.

Japanese Patent Laying-Open No. 2015-134563

  However, the wiper device of Patent Literature 1 operates when the switch unit is operated to connect the “+ B terminal” connected to the power source to the desired drive terminals “+1 terminal”, “+2 terminal”, and the like. A large current flows through the contacts of the part. In other words, the wiper motor is configured as a direct-cut contact that is connected to the power supply unit by the switch operation of the switch unit, and since the contact point of the switch unit is an actual load, arc wear and contact wear due to large currents are large and durable There was a problem that it was not excellent.

  Accordingly, an object of the present invention is to provide a wiper device having excellent contact durability of a switch portion.

[1] In order to achieve the above object, the present invention provides a wiper motor that performs wiper driving according to a wiper driving condition, a motor contact that switches connection between a power supply unit and the wiper motor, the power supply unit, and the wiper motor. A relay unit that turns on and off the connection state by a relay operation contact, and has a switch unit that switches the motor contact and the relay operation contact by operation of the operation unit, and by operation of the operation unit, The wiper device is characterized in that the wiper motor is driven when the relay contact is turned on after the motor contact is turned on.

[2] The wiper device according to [1], wherein the driving condition of the wiper is MIST driving that intermittently drives the wiper motor.

[3] The wiper device according to [1] or [2], wherein the relay unit is an internal relay provided in the switch unit.

  ADVANTAGE OF THE INVENTION According to this invention, the wiper apparatus excellent in the contact durability of a switch part can be provided.

FIG. 1 is an external view showing a state where a switch portion of a wiper device 1 according to an embodiment of the present invention is attached to a steering column. FIG. 2A (a) is an overall configuration diagram showing a wiper lever OFF state in the wiper device 1 according to the embodiment of the present invention, and FIG. 2A (b) is a diagram of the wiper device 1 according to the embodiment of the present invention. It is a whole block diagram which shows the state during wiper lever operation. FIG. 2B (c) is an overall configuration diagram showing a state during the MIST operation in the wiper apparatus 1 according to the embodiment of the present invention, and FIG. 2B (d) is the wiper apparatus 1 according to the embodiment of the present invention. FIG. 2 is an overall configuration diagram showing a state in which the switch unit is turned off and the wiper arm is in the middle of stopping. FIG. 3A is a diagram showing a connection state of the motor contact and the movable contact when the wiper lever operating angle is θ in the wiper device 1 according to the embodiment of the present invention. FIG. In the wiper apparatus 1 which concerns on embodiment of this invention, it is a figure which shows the connection state of the motor contact and movable contact in case the operation angle of a wiper lever is (theta) + (DELTA) (theta).

(Embodiment of the present invention)
The wiper device 1 according to the embodiment of the present invention includes a wiper motor 100 that performs wiper driving according to a driving condition of the wiper, a motor contact 310 that switches connection between the power supply unit 200 and the wiper motor 100, a power supply unit 200, and the wiper motor 100. A relay unit 410 that turns on and off the connection state with the relay operation contact 320, and a switch unit 300 that switches between the motor contact 310 and the relay operation contact 320 by operation of the operation unit. By operating a certain wiper lever 10, the relay contact 320 is turned on after the motor contact 310 is turned on, so that the wiper motor 100 is driven.

  By operating the wiper lever 10, the relay actuation contact 320 is switched from off to on in the state where the motor contact 310 is on. Thereby, arc wear and contact wear due to a large current of the motor contact 310 can be reduced, and the contact durability of the switch unit 300 is improved.

  In the above, for example, the wiper driving condition is MIST driving in which the wiper operation is performed only once by operating the switch. The relay unit 410 is an internal relay provided in the switch unit 300. 1 and 2A and the like, the switch unit 300, the relay unit 410, and the like are mounted on the PC board complete 400.

(Overall configuration of wiper device 1)
FIG. 1 is an external view showing a state where a switch portion of a wiper device 1 according to an embodiment of the present invention is attached to a steering column.

  As shown in FIG. 1, a wiper lever 10 that can be rotated about a rotation support shaft 13 and a switch portion that turns on and off a plurality of switch positions by rotating the wiper lever 10 are provided together with a turn lever 53 on the steering column 51 of the vehicle. It is attached.

  The wiper lever 10 can take the MIST position in the upward direction, with the OFF position shown in FIG. 1 as the initial position (neutral position), with the rotation support shaft 13 as the center, and the INT position, Lo position, and Hi position in the downward direction. Can be taken. When the operator swings the wiper lever 10 about the rotary support shaft 13, for example, at the MIST position, the position is not latched, but automatically returns to the OFF position and the wiper can be driven intermittently. For example, even if the operating force is released after operating to the INT position, Lo position, and Hi position, the operated contact state is maintained at each position.

  In the present embodiment, a case where a switch operation to the MIST position is performed by operating the wiper lever 10 will be described.

  FIG. 2A (a) is an overall configuration diagram showing a wiper lever OFF state in the wiper device 1 according to the embodiment of the present invention, and FIG. 2A (b) is a diagram of the wiper device 1 according to the embodiment of the present invention. It is a whole block diagram which shows the state during wiper lever operation. 2B (c) is an overall configuration diagram showing a state during the MIST operation in the wiper apparatus 1 according to the embodiment of the present invention, and FIG. 2B (d) is a wiper according to the embodiment of the present invention. FIG. 3 is an overall configuration diagram illustrating a state in which a switch unit is turned off in the apparatus 1 and a wiper arm is being stopped. Hereinafter, an outline of the circuit configuration will be described with reference to FIG. 2A (a).

  In the switch section 300 shown in FIG. 1, a contact section 350 in which a motor contact 310, a relay actuation contact 320, and the like are formed is formed. As shown in FIG. 2A (a), the contact state of the contact portion 350 is changed by the operation of the wiper lever 10 in accordance with each position (OFF, MIST, INT, Lo, Hi). The contact part 350 is configured as a direct-cutting contact point where the wiper motor 100 is connected to the power supply part by a switch operation of the wiper lever 10.

  For example, when the wiper lever 10 is operated to the MIST position, in the contact portion 350, the (+1) contact and the (+ S) contact are connected as actual loads. Although details will be described later, the (E) contact and the (MIST) contact are connected at a predetermined timing. As a result, the motor contact 310 and the relay actuation contact 320 are connected at a predetermined timing, whereby the wiper motor 100 is driven with a drive current corresponding to the MIST position, and a wiper arm (not shown) is driven to swing. A window wiper operation is performed.

  Similarly to the above, the switch unit 300 is formed with a combination of contacts whose connection state is changed corresponding to the OFF position, the INT position, the Lo position, and the Hi position. Further, a combination of contacts corresponding to the rear switch part and the washer switch is formed.

  In FIG. 2A (a), the + B terminal is connected to the power supply unit 200 (battery) via an ignition switch. The +1 terminal is connected to the Lo terminal 101 of the wiper motor 100, and the +2 terminal is connected to the Hi terminal 102 of the wiper motor 100. The ground terminal 103 of the wiper motor 100 is connected to the ground G and is also connected to the b terminal of the auxiliary switch 150.

  The a terminal of the auxiliary switch 150 is connected to the + S terminal, and the c terminal is connected to the + B terminal.

  The PC board complete 400 is equipped with a relay unit 410 as an internal relay. This relay unit 410 reduces the current load by changing the contact switching timing of the motor contact 310 in the MIST operation so as not to perform on / off switching with an actual load, and improves the contact durability of the motor contact 310. belongs to.

  The r1 terminal of the relay unit 410 is connected to the + S contact, the r2 terminal is connected to the + S terminal, and the r3 terminal is connected to the + B terminal. Moreover, the coil 411 for changing the connection of each terminal is provided, the one end 411a of the coil 411 is connected to + B terminal, and the other end 411b is connected to the anode side of the diode D6. The cathode side of the diode D6 is connected to the MIST contact.

(MIST position operation of wiper device 1)
In FIG. 1, the operation of the wiper device 1 when the switch operation for swinging the wiper lever 10 from the OFF (stop) position to the MIST position is performed is illustrated in FIGS. ) And FIGS. 3 (a) and 3 (b).

(Stopped)
When the wiper lever 10 is in the OFF (stop) position, as shown in FIG. 2A (a), in the contact portion 350, the (+1) contact and the (+ S) contact are connected as actual loads. Further, the (E) contact and the (INT1) contact are connected. However, since the coil 411 of the relay unit 410 is not energized, the r1 terminal and the r2 terminal are connected. The auxiliary switch 150 is in a state in which the a terminal and the b terminal are connected because the wiper arm is at the stop position.

  In the above connection state, no current is supplied from the power supply unit 200 (battery) to the wiper motor 100, so that the wiper operation (MIST operation) is not performed.

(Wiper lever 10 in operation)
During the operation of the wiper lever 10, that is, in the range from the operation angle θ to θ + Δθ, the state shown in FIG. FIG. 2A (b) is the same as FIG. 2A (a), and the electrical connection state is the same.

  Here, FIG. 3A is a diagram showing a connection state between the motor contact and the movable contact in the wiper device 1 according to the embodiment of the present invention when the operation angle of the wiper lever is θ. As shown in FIG. 1, it is a figure which shows the connection state in the middle of operating the wiper lever 10 from the OFF (stop) position to just before reaching | attaining a MIST position.

In FIG. 3A, the movable contact 315 rotates about θ + Δθ around the rotation support shaft 13 by operating the wiper lever 10. The movable contact 315 and the motor contact 310 are in the contact-off state in the range from the operating angle zero to θ, and the contact is turned on when rotating to θ . On the other hand, the movable contact 325 and the relay actuation contact 320 are always in the contact-off state in the range from the operation angle zero to θ + Δθ.

  Therefore, during operation of the wiper lever 10, the relay activation contact 320 is off and the coil 411 of the relay unit 410 is not energized, so that the r1 terminal and the r2 terminal are connected. The auxiliary switch 150 is in a state in which the a terminal and the b terminal are connected because the wiper arm is at the stop position.

  In the above connection state, no current is supplied from the power supply unit 200 (battery) to the wiper motor 100, so that the wiper operation (MIST operation) is not performed.

(MIST operation)
When the wiper lever 10 reaches the operation angle θ + Δθ shown in FIG. 1, the state shown in FIG. 2B (c) is obtained, and the MIST operation is performed. Here, FIG. 3B is a diagram showing a connection state of the motor contact and the movable contact when the wiper lever operating angle is θ + Δθ in the wiper apparatus 1 according to the embodiment of the present invention. As an example, the operation angle of the wiper lever is θ = 3 ° and Δθ = 1 °.

In FIG. 3B, the operation of the wiper lever 10 causes the movable contact 315 to rotate to θ + Δθ around the rotation support shaft 13. The movable contact 315 and the motor contact 310 are in the contact-off state in the range from the operating angle zero to θ, and the contact is turned on when rotating to θ . On the other hand, the movable contact 325 and the relay actuating contact 320 are in a contact-on state when the wiper lever 10 is operated to the operation angle θ + Δθ.

  That is, when the movable contact 315 and the motor contact 310 are in a contact-on state, the movable contact 325 and the relay actuation contact 320 are switched from contact-off to contact-on.

  In FIG. 2B (c), the movable contact 325 and the relay actuation contact 320 are turned on, that is, the (E) contact and the (MIST) contact are connected. As a result, a current flows from the power supply unit 200 (battery) via the + B terminal, the coil 411, the diode D6, the (MIST) contact, and the (E) contact, and the relay unit 410 operates to operate the r1 terminal and the r3 terminal. Is connected (current flows through the thick line portion in FIG. 2B (c)).

  By the operation of the relay unit 410 described above, current is supplied to the wiper motor 100 as follows. As shown in FIG. 2B (c), since the movable contact 315 and the motor contact 310 are in a contact-on state, from the power supply unit 200 (battery), the + B terminal, the r3 terminal, the r1 terminal, the + S contact, (+1) A current flows through the wiper motor 100 via the contact, the terminal 101 of the wiper motor 100, and the ground terminal 103 (current flows through a thick line portion in FIG. 2B (c)). As a result, the wiper motor 100 rotates and the wiper arm (not shown) is driven to swing, whereby the window wiper operation is executed.

  The auxiliary switch 150 is connected to the a terminal and the c terminal during the operation of the wiper arm by the swing drive of the wiper arm (not shown).

(While stopping)
In FIG. 1, when the wiper lever 10 is operated from the MIST position to the OFF (stop) position, for example, the current supply to the coil 411 is stopped, the relay unit 410 is turned off, and r1 as shown in FIG. 2B (d). The terminal and the r2 terminal are connected. Further, since the wiper arm is not at the stop position, the auxiliary switch 150 is in a state where the a terminal and the c terminal are connected.

  As shown in FIG. 2B (d), since the movable contact 315 and the motor contact 310 remain in the contact-on state, the c terminal, the a terminal, and the relay unit 410 of the auxiliary switch 150 are supplied from the power supply unit 200 (battery). Current flows through the wiper motor 100 via the r2 terminal, r1 terminal, + S contact, (+1) contact, the terminal 101 of the wiper motor 100, and the ground terminal 103. Accordingly, the wiper motor 100 rotates and the wiper arm (not shown) is driven to swing, so that the wiper operation of the window is continued.

  When the wiper arm (not shown) returns to the stop position, the terminals a and b of the auxiliary switch 150 are connected, and the stop state shown in FIG.

(Effect of embodiment)
The wiper device according to the embodiment of the present invention has the following effects. The wiper device 1 according to the present embodiment includes a wiper motor 100 that performs wiper driving according to a wiper driving condition, a motor contact 310 that switches connection between the power supply unit 200 and the wiper motor 100, and the power supply unit 200 and the wiper motor 100. A wiper lever serving as an operation unit, including a relay unit 410 that is turned on and off by a relay operation contact 320, and having a switch unit 300 for switching the motor contact 310 and the relay operation contact 320 by operation of the operation unit. 10, the wiper motor 100 is driven by turning on the relay actuation contact 320 after the motor contact 310 is turned on. That is, when the wiper lever 10 is operated, the motor contact 310 is switched from off to on in the state where the motor contact 310 is on. As a result, the relay actuating contact 320 is turned on while the motor contact 310 is turned on, so that a large current switch is not opened / closed at the motor contact 310, so that arc wear of the motor contact 310 due to the large current is performed. The contact wear can be reduced, and the contact durability of the switch unit 300 is improved.

  As mentioned above, although embodiment of this invention was described, these embodiment is only an example and does not limit the invention which concerns on a claim. These novel embodiments can be implemented in various other forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention.

  In the present embodiment, the circuit configuration in which the relay unit 410 is used only for the MIST operation is used, but the present invention can also be applied to wiper operations in other positions, for example, the INT, Lo, and Hi positions.

  In addition, not all the combinations of features described in these embodiments are essential to the means for solving the problems of the invention. Furthermore, these embodiments are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1 ... wiper device,
DESCRIPTION OF SYMBOLS 10 ... Wiper lever 13 ... Rotation spindle 51 ... Steering column 53 ... Turn lever 100 ... Wiper motor 101,102 ... Terminal 103 ... Ground terminal 150 ... Auxiliary switch 200 ... Power supply part 300 ... Switch part 310 ... Motor contact 315 ... Movable contact 320 ... Relay operation contact 325 ... Movable contact 350 ... Contact part 400 ... PC board complete 410 ... Relay part 411 ... Coil 411a ... One end 411b ... Other end D6 ... Diode G ... Ground θ, Δθ ... Operating angle

Claims (3)

A wiper motor for driving the wiper according to the driving condition of the wiper;
A motor contact for switching the connection between the power supply unit and the wiper motor; and a relay unit for turning on and off the connection state between the power supply unit and the wiper motor by a relay operation contact. The motor contact and the relay are operated by an operation unit. A switch part for switching the contact for operation,
The wiper device is characterized in that the wiper motor is driven when the relay contact is turned on after the motor contact is turned on by the operation of the operation unit.   The wiper device according to claim 1, wherein the driving condition of the wiper is MIST driving that intermittently drives the wiper motor.   The wiper device according to claim 1, wherein the relay unit is an internal relay provided in the switch unit.

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