JP2018034603A - Rear wiper device and rear wiper control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear wiper device capable of evenly wiping dirt of a rear window in a washer interlocking operation for interlocking jetting of cleaning fluid with reciprocating rotation of a rear wiper.SOLUTION: A rear wiper device includes: a rear wiper driving section which reciprocally rotates a rear wiper 2 for wiping a rear window of a vehicle between a first position and a second position as predetermined positions; a rear washer driving section which drives a rear washer 3 for jetting cleaning fluid to a substantially center section of the rear window; a washer operation switch which instructs washing of the rear window; and a rear wiper control device which controls operations of the rear wiper driving section and the rear washer driving section when the washer operation switch is operated. The rear wiper control device controls the operation of the rear washer driving section so as to jet cleaning fluid at a timing for rotating the rear wiper from the first position to the second position and at a timing for rotating the rear wiper 2 from the second position to the first position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rear wiper device and a rear wiper control device.

A wiper device for wiping the front window of a vehicle includes a wiper driving unit that reciprocally rotates the wiper continuously or intermittently in rainy weather and the like, and a washer driving unit that injects cleaning liquid onto the front window. The cleaning liquid is ejected at an arbitrary timing when the washer operation switch is operated by the driver.
In addition, there is a wiper device having a washer interlocking operation function that automatically and reciprocally rotates the wiper a plurality of times in conjunction with the ejection of the cleaning liquid. Patent Document 1 discloses a wiper driving device that detects the position of a wiper blade during a washer-linked operation, and can temporarily stop spraying a cleaning liquid when it is determined that the wiper blade is in the vicinity of a cleaning liquid injection port. Is disclosed.

Japanese Patent Laid-Open No. 10-329656

By the way, the wiper device for the front window includes two wiper blades and two nozzles for injecting the cleaning liquid, and a rotation fulcrum of the wiper blade is provided on the driver's seat side in order to secure the driver's view. There are many.
On the other hand, the rear wiper device for wiping the rear window includes one wiper blade and one injection nozzle, and the wiper blade has a rotational fulcrum at a substantially central portion in the lateral direction in order to wipe the rear window evenly. In many cases, the injection nozzle is also arranged at the substantially central portion in the horizontal direction.

  For this reason, when the rear wiper device is operated by injecting the cleaning liquid, there is a problem that the rear window is not evenly wiped with the cleaning liquid depending on the injection timing of the cleaning liquid.

The cleaning liquid sprayed when the wiper blade is rotated from the starting position to the end reversal position is spread in the direction of movement of the wiper blade from the approximate center of the rear window. Therefore, the cleaning liquid flows down downward. For this reason, when the wiper blade rotates to the starting position side in the opposite direction, no cleaning liquid remains, and the dirt on the starting position side of the rear window is not sufficiently wiped off.
In order to spread the cleaning liquid over the entire surface of the rear window, it is necessary to spray the cleaning liquid several times or continuously while checking the position of the wiper blade, but the driver feels bothered by complicated operations. There's a problem. There is also a problem that the consumption of the cleaning liquid is large.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rear wiper device and a rear wiper control device capable of wiping dirt on a rear window evenly in a washer interlocking operation that interlocks jetting of cleaning liquid and reciprocating rotation of a rear wiper.

  The rear wiper device according to this aspect sprays the cleaning liquid onto a rear wiper driving unit that reciprocally rotates a rear wiper that wipes a rear window of a vehicle between a predetermined first position and a second position, and a substantially central portion of the rear window. A rear washer drive unit that drives a rear washer, a washer operation switch that instructs cleaning of the rear window, and a rear wiper that controls operations of the rear wiper drive unit and the rear washer drive unit when the washer operation switch is operated. A control device, and the rear wiper control device ejects cleaning liquid at a timing when the rear wiper rotates from the first position to the second position and a timing when the rear wiper rotates from the second position to the first position. In this manner, the operation of the rear washer driving unit is controlled.

  The rear wiper control device according to this aspect includes a rear wiper driving unit that reciprocally rotates a rear wiper that wipes a rear window of a vehicle between a predetermined first position and a second position, and a cleaning liquid is sprayed to a substantially central portion of the rear window. A rear wiper control device that controls the operation of a rear washer driving unit that drives a rear washer, wherein the rear wiper rotates from a first position to a second position, and the rear wiper moves from a second position to a first position. The operation of the rear washer driving unit is controlled so that the cleaning liquid is jetted at the timing of turning to the right.

  Note that the present application can be realized not only as a rear wiper device including such a characteristic processing unit, but also as a vehicle information display method using such characteristic processing as a step, It can be realized as a program for execution. Also, it can be realized as a semiconductor integrated circuit that realizes part or all of the rear wiper device, or as another system including the rear wiper device.

  According to the above, it is possible to provide a rear wiper device and a rear wiper control device that can wipe the dirt of the rear window evenly in the washer interlocking operation that interlocks the ejection of the cleaning liquid and the reciprocating rotation of the rear wiper.

It is a mimetic diagram showing an example of 1 composition of a rear wiper device concerning an embodiment of the present invention. It is a block diagram which shows the example of 1 structure of the rear wiper apparatus which concerns on embodiment of this invention. It is a schematic diagram which shows the wiping method of the rear window by a washer interlocking operation. It is a flowchart which shows the process sequence of the control part which concerns on a washer interlocking operation. It is a flowchart which shows the process sequence of the control part which concerns on a washer interlocking operation.

[Description of Embodiment of the Present Invention]
First, embodiments of the present invention will be listed and described. Moreover, you may combine arbitrarily at least one part of embodiment described below.

(1) A rear wiper device according to this aspect includes a rear wiper driving unit that reciprocally rotates a rear wiper for wiping a rear window of a vehicle between a predetermined first position and a second position, and a cleaning liquid at a substantially central portion of the rear window. A rear washer drive unit that drives a rear washer that injects the water, a washer operation switch that instructs cleaning of the rear window, and the operation of the rear wiper drive unit and the rear washer drive unit when the washer operation switch is operated. A rear wiper control device for controlling the cleaning device, wherein the rear wiper control device has a cleaning liquid at a timing when the rear wiper rotates from the first position to the second position and a timing when the rear wiper rotates from the second position to the first position. The operation of the rear washer driving unit is controlled so that is injected.

In this aspect, since the cleaning liquid is automatically ejected at the timing when the rear wiper rotates from the first position to the second position, it is possible to wipe the second position side from the substantially central portion of the rear window with the cleaning liquid. it can. Similarly, since the cleaning liquid is automatically ejected at the timing when the rear wiper rotates from the second position to the first position, the first position side can be wiped with the cleaning liquid from the substantially central portion of the rear window.
Therefore, the dirt on the rear window can be wiped off evenly with the cleaning liquid.

(2) The rear wiper control device includes a first injection control unit that operates the rear washer driving unit when the washer operation switch is operated, and a cleaning liquid that is injected by the first injection control unit, A first wiping control unit that rotates the rear wiper from a first position to a second position; a second injection control unit that operates the rear washer driving unit when the rear wiper rotates to the second position; A configuration including a second wiping control unit that rotates the rear wiper from the second position to the first position when the cleaning liquid is jetted by the jetting control unit is preferable.

In this aspect, when the washer operation switch is operated, the rear wiper control device ejects the cleaning liquid to the substantially central portion of the rear window. Thereafter, the rear wiper control device rotates the rear wiper from the first position to the second position. By the above control, the second position side can be wiped off with the cleaning liquid mainly from the substantially central portion of the rear window.
When the rear wiper rotates to the second position, the rear wiper control device causes the cleaning liquid to be sprayed on the substantially central portion of the rear window. Thereafter, the rear wiper control device rotates the rear wiper from the second position to the first position. By the above control, the first position side can be wiped off with the cleaning liquid mainly from the substantially central portion of the rear window.

(3) A storage unit that stores a cleaning operation time during which the washer operation switch is continuously operated is provided, and the first injection control unit is configured so that the rear washer supplies the cleaning liquid while the washer operation switch is operated. It is preferable that the rear washer driving unit is operated so as to continuously inject, and the second injection control unit continuously operates the rear washer driving unit for the cleaning operation time stored in the storage unit.

In this aspect, the rear wiper control unit ejects the cleaning liquid while the washer operation switch is being operated. Accordingly, the driver can spray an arbitrary amount of cleaning liquid according to the dirtiness of the rear window, and can wipe the second position side from the substantially central portion of the rear window with the cleaning liquid.
In addition, the same amount of the cleaning liquid is automatically sprayed before the rear wiper rotates from the second position to the first position, and the second position side can be wiped with the cleaning liquid from a substantially central portion of the rear window.
Therefore, the dirt on the rear window can be wiped off evenly with an arbitrary amount of cleaning liquid according to the driver's operation.

(4) A rear wiper control device according to this aspect includes a rear wiper driving unit that reciprocally rotates a rear wiper that wipes a rear window of a vehicle between a predetermined first position and a second position, and a substantially central portion of the rear window. A rear wiper control device that controls an operation of a rear washer driving unit that drives a rear washer that injects cleaning liquid, wherein the rear wiper is rotated from a first position to a second position, and the rear wiper is moved from a second position. The operation of the rear washer driving unit is controlled so that the cleaning liquid is ejected at the timing of turning to the first position.

  In this embodiment, as in the embodiment (1), the dirt on the rear window can be uniformly wiped with the cleaning liquid.

[Details of the embodiment of the present invention]
A specific example of a vehicle information display system according to an embodiment of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes within the meaning and range equivalent to a claim are included.

  FIG. 1 is a schematic diagram illustrating a configuration example of a rear wiper apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a configuration example of a rear wiper apparatus according to an embodiment of the present invention. The rear wiper device according to the present embodiment includes a rear wiper control device 1, a rear wiper 2, a rear washer 3, and a washer operation switch 4.

  The rear wiper 2 includes one wiper arm, and a base portion of the wiper arm is rotatably supported by a rotation shaft provided at a lower portion of a substantially central portion in the horizontal direction of the rear window W. A wiper blade for wiping the rear window W is provided at the tip of the wiper arm. The wiper blade reciprocates while sliding on the surface of the rear window W by the rotation of the wiper arm, and wipes dirt on the rear window W. The wiper blade has a rod shape, and the area wiped by the reciprocating rotation of the wiper blade and the wiper arm has a fan shape. Hereinafter, the position where the stopped wiper blade starts reciprocating rotation is the start position (first position), and after the rotation from the start position, the position where the wiper blade reverses the rotation direction is the terminal reverse position (second position). (Position). The wiper blade is substantially horizontal at the starting position and the terminal reversal position.

  The rear wiper driving unit 2a includes a motor that rotates the wiper arm. The rear wiper drive unit 2a rotates the motor forward and backward and reciprocally rotates the wiper arm according to the control of the rear wiper control device 1.

  The rear washer 3 includes a cleaning liquid tank and one nozzle that injects the cleaning liquid in the cleaning liquid tank to a substantially central portion of the rear window W. The nozzle is provided at the lower part or the upper part of the central portion of the rear window W in the horizontal direction.

  The rear washer driving unit 3 a includes a pump that supplies the cleaning liquid in the cleaning tank to the nozzles of the rear washer 3. The rear washer driving unit 3a drives the pump and jets the cleaning liquid under the control of the rear wiper control device 1.

  The rear wiper control device 1 includes a control unit 11 that controls the operation of each component of the rear wiper control device 1. The control unit 11 is a microcomputer having, for example, one or a plurality of CPUs (Central Processing Units), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 11 includes a timer 12, a counter 13, an output unit 14, and an input unit 15.

  The timer 12 is an element that measures time according to the control of the control unit 11, and the control unit 11 can recognize the rotational position of the rear wiper 2 by referring to the time measured by the timer 12. Note that a detection switch for detecting that the wiper blade of the rear wiper 2 is in the starting position and the terminal reversal position may be provided, and the rotation position of the rear wiper 2 may be detected using the detection switch.

  The counter 13 is an element for counting the cleaning liquid ejection time, and the control unit 11 can detect the cleaning liquid ejection time using the count value of the counter 13. The counter 13 can count a plurality of count values T1 and T2. The counter 13 functions as a storage unit that stores the cleaning operation time of the washer operation switch 4.

  The output unit 14 is connected to a rear wiper driving unit 2a and a rear washer driving unit 3a. The control unit 11 outputs a wiper drive signal to the rear wiper drive unit 2a via the output unit 14, thereby controlling the operation of the rear wiper drive unit 2a and rotating the rear wiper 2 back and forth. Further, the control unit 11 outputs an ejection driving signal to the rear washer driving unit 3a via the output unit 14, thereby controlling the operation of the rear washer driving unit 3a and ejecting the cleaning liquid.

  The input unit 15 is connected to the washer operation switch 4 for instructing the ejection of the cleaning liquid, and a signal corresponding to the operation state of the washer operation switch 4 is input. The control unit 11 can recognize the operation state of the washer operation switch 4 based on the signal input to the input unit 15.

  FIG. 3 is a schematic diagram showing a method of wiping the rear window W by the washer interlocking operation, and FIGS. 4 and 5 are flowcharts showing a processing procedure of the control unit 11 related to the washer interlocking operation. The control unit 11 monitors the operation state of the washer operation switch 4, and determines whether or not the washer operation switch 4 is in an on state (step S11). When it determines with the washer operation switch 4 not being an ON state (step S11: NO), the control part 11 returns a process to step S11.

  When it is determined that the washer operation switch 4 is in the ON state (step S11: YES), the control unit 11 drives the rear washer 3 by outputting an injection driving signal to the rear washer driving unit 3a, and the process shown in FIG. As shown, a washer fluid is sprayed (step S12). A portion with dense hatching indicates a region where dirt is attached, and a portion with rough hatching indicates a region where the cleaning liquid is jetted. Next, the control unit 11 updates the count value T1 of the counter 13 by counting up (step S13).

  Next, the control unit 11 determines whether or not the washer operation switch 4 is in an off state (step S14). When it determines with the washer operation switch 4 being an ON state (step S14: NO), the control part 11 returns a process to step S12. When it determines with the washer operation switch 4 being an OFF state (step S14: YES), the control part 11 starts time-measurement with the timer 12 (step S15). And the control part 11 drives the rear wiper 2, as shown to FIG. 3B by outputting a wiper drive signal to the rear wiper drive part 2a (step S16). In FIG. 3B, the arrow indicates the rotation direction of the rear wiper 2, and the portion with rough hatching indicates a region wiped with the cleaning liquid. Next, the control unit 11 determines whether or not the time measured by the timer 12 is the first predetermined time (step S17). The first predetermined time is a time required for the rear wiper 2 to move from the initial position to the end position. When it determines with it not being the 1st predetermined time (step S17: NO), the control part 11 returns a process to step S16, and operates the rear wiper 2 continuously.

  When it is determined that the time measured by the timer 12 is the first predetermined time (step S17: YES), the control unit 11 outputs an injection drive signal to the rear washer drive unit 3a, as shown in FIG. The rear washer 3 is driven to inject the washer fluid (step S18). A portion with rough hatching indicates a region where the cleaning liquid is jetted, and a white portion indicates a portion where wiping with the cleaning liquid is completed. Next, the control unit 11 updates the count value T2 of the counter 13 by counting it up (step S19).

  Then, the control unit 11 determines whether or not the count value T2 of the counter 13 is greater than the count value T1 (step S20). When it is determined that the count value T2 is equal to or less than the count value T1 (step S20: NO), the control unit 11 returns the process to step S18 and continues the washer fluid injection.

  When it is determined that the count value T12 is greater than the count value T1 (step S20: YES), the control unit 11 resets the timer 12 and starts measuring time (step S21). And the control part 11 drives the rear wiper 2 as shown to FIG. 3D by outputting a wiper drive signal to the rear wiper drive part 2a (step S22). In FIG. 3D, the arrow indicates the rotation direction of the rear wiper 2, and a portion with rough hatching indicates a region wiped with the cleaning liquid. Next, the control unit 11 determines whether or not the time measured by the timer 12 is the second predetermined time (step S23). The second predetermined time is a time required for the rear wiper 2 to move from the terminal position to the initial position. When it determines with it not being the 2nd predetermined time (step S23: NO), the control part 11 returns a process to step S22, and operates the rear wiper 2 continuously. When it is determined that the time measured by the timer 12 is the second predetermined time (step S23: YES), the process is terminated. While the rear wiper 2 reciprocates once, the cleaning liquid is sprayed twice, and the rear window W is uniformly wiped by the cleaning liquid as shown in FIG. 3E. In FIG. 3E, a white portion indicates a region where wiping with the cleaning liquid is completed.

  As described above, according to the rear wiper 2 device according to the embodiment, the dirt on the rear window W can be wiped evenly in the washer interlocking operation that interlocks the ejection of the cleaning liquid and the reciprocating rotation of the rear wiper 2.

  Further, the dirt on the rear window W can be wiped off evenly with an arbitrary amount of cleaning liquid according to the driver's operation.

  In the present embodiment, the configuration in which the cleaning liquid is ejected for the time during which the operation time of the washer operation switch 4 is operated has been described. However, the cleaning liquid is automatically ejected for a predetermined time by one washer operation switch 4. You may comprise so that it may do.

DESCRIPTION OF SYMBOLS 1 Rear wiper control apparatus 2 Rear wiper 2a Rear wiper drive part 3 Rear washer 3a Rear washer drive part 4 Washer operation switch 11 Control part 12 Timer 13 Counter 14 Output part 15 Input part C Vehicle W Rear window

Claims (4)

A rear wiper driving unit that reciprocally rotates a rear wiper that wipes a rear window of the vehicle between a predetermined first position and a second position;
A rear washer driving unit that drives a rear washer that injects a cleaning liquid into a substantially central portion of the rear window;
A washer operation switch for instructing cleaning of the rear window;
A rear wiper controller that controls the operation of the rear wiper drive unit and the rear washer drive unit when the washer operation switch is operated,
The rear wiper control device includes:
The operation of the rear washer driving unit is controlled so that the cleaning liquid is jetted at the timing when the rear wiper rotates from the first position to the second position and the timing when the rear wiper rotates from the second position to the first position. Rear wiper device. The rear wiper control device includes:
A first injection control unit that operates the rear washer drive unit when the washer operation switch is operated;
A first wiping control unit that rotates the rear wiper from a first position to a second position when the cleaning liquid is jetted by the first jetting control unit;
A second injection control unit that operates the rear washer driving unit when the rear wiper rotates to the second position;
The rear wiper device according to claim 1, further comprising: a second wiping control unit that rotates the rear wiper from the second position to the first position when the cleaning liquid is ejected by the second ejection control unit. A storage unit for storing a cleaning operation time in which the washer operation switch is continuously operated;
The first injection control unit
While the washer operation switch is operated, the rear washer driving unit is operated so that the rear washer continuously ejects the cleaning liquid,
The second injection control unit
The rear wiper device according to claim 2, wherein the rear washer driving unit is continuously operated during a cleaning operation time stored in the storage unit. A rear wiper driving unit that reciprocally rotates a rear wiper that wipes a rear window of a vehicle between a predetermined first position and a second position, and a rear washer driving that drives a rear washer that injects cleaning liquid to a substantially central portion of the rear window. A rear wiper control device for controlling the operation of the unit,
The operation of the rear washer driving unit is controlled so that the cleaning liquid is jetted at the timing when the rear wiper rotates from the first position to the second position and the timing when the rear wiper rotates from the second position to the first position. Rear wiper control device.

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