JP2006321349A - Wiper device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the easiness in handling by arranging so that the intermittent interval is adjustable through the wiper manipulation to be conducted normally. <P>SOLUTION: When a wiper combination switch 7 is set in the INT position 7c, an intermittent interval calculation part 11 sets the intermittent interval T1 on the basis of the intermittent interval initial value Tc, and wiper bodies 2a and 2b are operated intermittently with T1. If at that time, a MIST position 7b is turned on, the intermittent interval calculation part 11 corrects the intermittent interval T1 in the direction of its being shortened, and the wiper bodies 2a and 2b are operated intermittently with the corrected T1. Because T1 can be adjusted only by turning on the MIST position 7b, the easiness in handling is enhanced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wiper device for a vehicle that can easily adjust the intermittent time of a wiper.

  Generally, the wiper device for a vehicle can arbitrarily select an operation mode of the wiper by setting a wiper combination switch at a predetermined position. As the operation mode, there are a continuous high-speed mode for continuous operation at high speed, a continuous low-speed mode for continuous operation at low speed, an intermittent mode for intermittent operation at predetermined intervals, and the like.

Further, in the intermittent mode, an interval time (operation cycle) during operation can be selected by operating a multistage changeover switch, a volume switch, or the like. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2003-2170) discloses a technique that allows an intermittent time in an intermittent mode to be selected by an ON / OFF operation mode of one switch.
Japanese Patent Laid-Open No. 2003-2170 JP-A-7-267051

  By the way, in the technique disclosed in Patent Document 1 described above, once the wiper intermittent time is set by an operation of a multi-stage changeover switch, a volume switch or the like, the intermittent time is fixed. The wiper is intermittently operated repeatedly at the same cycle.

  However, since the degree of attachment of raindrops and the like during traveling varies depending on the traveling conditions and the amount of rainfall, it is more convenient that the intermittent time can be automatically variably set according to the degree of attachment of raindrops during traveling. Therefore, for example, Patent Document 2 (Japanese Patent Laid-Open No. 7-267051) discloses a technique for variably setting the intermittent time in the intermittent mode by map search using the raindrop amount and the traveling vehicle speed as parameters.

  According to the technique disclosed in Patent Document 2, since the intermittent time of the wiper is automatically set according to the vehicle speed and the amount of raindrops, there is no need for a manual intermittent time change operation, which is easy to use. Furthermore, the same document discloses a technique in which the intermittent time can be variably set by the driver operating the up button or the down button of the setting means, and the intermittent time can be set according to the driver's preference. ing.

  However, in the technique disclosed in Patent Document 2, it is necessary to separately provide a setting unit for adjusting the intermittent time in the wiper device, which has the disadvantage of increasing the number of parts and increasing the cost. In addition, there is a problem of lack of versatility because it cannot be applied to existing vehicles.

  Further, as an operation for changing the intermittent time, there is a problem that the operability is poor because an operation means different from the normal switch operated to drive the wiper has to be operated.

  In view of the above circumstances, the present invention makes it possible to adjust the intermittent time by using a conventional wiper operation without adding new parts, and suppressing an increase in parts cost, Another object is to provide a vehicle wiper device that is easy to use.

  In order to achieve the above object, a vehicle wiper device according to the present invention has a wiper body for wiping a windshield of a vehicle, drive means for operating the wiper body, and a plurality of switch positions for selecting the operation of the wiper body. A switch means and a control means for intermittently operating the driving means when the intermittent position is selected by the switch means, and when the switch means selects another switch position in a state where the intermittent position is selected. An intermittent time calculation unit that corrects the intermittent time to a short time and sets a new intermittent time is provided.

  According to the present invention, it is possible to adjust the intermittent time by using the existing equipment without adding new parts, and by a normal wiper operation, and it is possible to suppress the rise in the cost of parts and to be easy to use. Improvements can be made.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment of the present invention. FIG. 1 shows a block diagram of a vehicle wiper device.

  A pair of wiper main bodies 2 a and 2 b provided with a wiper blade for wiping raindrops and the like adhering to the wind glass 1 are disposed on a wind glass (mainly a front window) 1 of the vehicle. Each wiper body 2a, 2b is swung in a fan shape by the wiper motor 4 to wipe the wind glass 1.

  A motor drive circuit 5 as drive means for driving the wiper motor 4 outputs a drive signal to the wiper motor 4 in accordance with a control signal from a control unit 6 as control means. The control unit 6 is mainly composed of a computer (microcomputer) provided with a known CPU, ROM, RAM, timer (not shown) and the like, and a wiper combination as a switch means is provided on the input side thereof. A switch 7 or the like is connected.

  The wiper combination switch 7 is provided on the steering column. In this embodiment, the switch position is OFF position 7a, MIST (mist) position 7b as selection means, INT (intermittent) position 7c, LO position 7d, HI position 7e. Has 5 positions. Among these, the four positions 7a and 7c to 7e can be selected by tilting the operation lever provided in the wiper combination switch 7. Further, the MIST position 7b can be turned ON by operating in a direction different from the above-described four positions, such as pulling the operation lever forward. Accordingly, the MIST position 7b can be turned ON simultaneously with the other four positions.

  The OFF position 7a is a position for stopping the wiper operation. When the operation lever is set to the INT position 7c from this state, the wiper main bodies 2a and 2b are intermittently operated. Further, when the operation lever is set at the LO position 7d, the low-speed continuous mode in which the wiper bodies 2a and 2b are continuously operated at a low speed is set. Further, when the operation lever is set at the HI position 7e, the high-speed continuous mode in which the wiper bodies 2a and 2b are continuously operated at high speed is set. Further, for example, when the MIST position 7b is turned on by pulling the operation lever forward, the wiper bodies 2a and 2b are reciprocated only once each time the ON operation is performed.

  The instruction mode for the intermittent operation time (operation cycle) of the wiper operation set when the operation lever is set at the INT position 7c is indicated by rotating the operation knob provided at the tip of the operation lever. can do. As shown in FIG. 2, in this embodiment, the instruction mode of intermittent time that can be instructed is set to 5 modes of FAST mode → second mode → third mode → fourth mode → SLOW mode from the short interval time. ing. The intermittent time can be instructed steplessly by linking the volume to the operation knob.

  The control unit 6 outputs an operation signal suitable for each position to the motor drive circuit 5 based on a signal input from the wiper combination switch 7, and outputs a drive signal from the motor drive circuit 5 to the wiper motor 4. The main bodies 2a and 2b are reciprocated in a predetermined manner.

  When the operation lever is set at the INT position 7c, the control unit 6 calculates the intermittent time and outputs a one-pulse drive signal to the motor drive circuit 5 every predetermined time. The motor drive circuit 5 reciprocates the wiper motor 4 only once each time a 1-pulse drive signal is input from the control unit 6. When the operation lever is set to the INT position 7c and the MIST position 7b is turned on by the operation lever, the control unit 6 corrects the intermittent time according to the timing when the MIST position 7b is turned on. .

  The control unit 6 is provided with an intermittent time calculation unit 11 and a storage unit 12 for temporarily storing the corrected intermittent time calculated by the intermittent time calculation unit 11 as functions for calculating the intermittent time. Yes.

  Specifically, the intermittent time calculated by the intermittent time calculation unit 11 is processed according to the flowcharts shown in FIGS.

  When the ignition switch is turned on, the intermittent time control determination routine shown in FIG. 3 is executed every predetermined time. First, in step S1, it is checked whether the operation lever of the wiper combination switch 7 is set to the INT position 7c. Wait until it is set to position 7c.

  When the operating lever is set to the INT position 7c, the process proceeds to step S2, the intermittent time control is executed, and the routine is exited.

  The intermittent time control executed in step S2 is processed according to the intermittent time control subroutine shown in FIG.

  In this subroutine, first, in step S11, an intermittent time initial value To is set. The intermittent time initial value To is the initial value of the intermittent time mode (FAST mode, second to fourth mode, or SLOW mode in FIG. 2) indicated by the operation knob when the intermittent time control is executed. Set as a value.

  Then, the process proceeds to step S12, and the intermittent time initial value To set in step S11 is set as the intermittent time T1 (T1 ← To). Subsequently, it progresses to step S13, presets intermittent time T1 to the timer memory provided in the memory | storage part 12, and progresses to step S14.

  The intermittent time T1 preset in the timer memory is set in the timer, and time measurement by the timer is started. A drive signal of one pulse is output to the motor drive circuit 5 every time the intermittent time T1 is up. As a result, the wiper motor 4 rotates once and the wiper bodies 2a and 2b are reciprocated only once. Immediately after setting the operation lever to the INT position 7 c, a 1-pulse drive signal is output from the control unit 6 to the motor drive circuit 5. Accordingly, when set to the INT position 7c, the wiper bodies 2a and 2b are first reciprocated once.

  Thereafter, when the process proceeds to step S14, it is checked whether or not the MIST position 7b has been turned ON. When the MIST position 7b is not turned ON, the process jumps to step S18. When the ON operation is performed, the process proceeds to step S15, and a correction value (T1 correction value) α for the intermittent time T1 is set.

  The following can be considered as a method for setting the T1 correction value α.

(1) The subtraction fixed value l1 (for example, 0.2 [sec]) is set as it is as the T1 correction value α (α ← l1).

(2) The T1 correction value α is set by weighting by multiplying the fixed value for subtraction l1 by the set value k (where 1> k> 0) (α ← l1 · k).

(3) The multiplication fixed value m1 (for example, 0.95) is set as it is as the T1 correction value α (α ← m1).

  Next, the process proceeds to step S16, and the current intermittent time T1 is set based on the intermittent time T1 and the T1 correction value α (T1 ← f (T1, α)).

  As the setting method of the intermittent time T1, the following can be considered.

(1) When the T1 correction value α is set based on the fixed subtraction value l1 (α ← l1 or α ← l1 · k)
T1 ← T1-α
In this case, when the subtraction of the intermittent time T1 is repeated with the T1 correction value α, T1 = 0 is finally obtained.

(2) When the T1 correction value α is set based on the multiplication fixed value m1 (α ← m1)
T1 ← T1 ・ α
When α is 1>α> 0, the intermittent time T1 is always T1> 0.

  Thereafter, when the process proceeds to step S17, the intermittent time T1 set in step S16 is preset in the timer memory provided in the storage unit 12, and the process proceeds to step S18. The intermittent time T1 preset in the timer memory provided in the storage unit 12 is sequentially updated, and triggers when the intermittent time T1 set in the timer is up or when the MIST position 7b is turned on. As a timer. Accordingly, unless a new intermittent time T1 is preset in the timer memory, the wiper bodies 2a and 2b are intermittently operated in the same operation cycle.

  In step S18, it is checked whether or not the intermittent time instruction mode (FAST mode, second to fourth mode, or SLOW mode in FIG. 2) has been changed by operating the operation knob. Proceed to S19, and if changed, branch to step S20.

  In step S19, it is checked whether or not the operating lever has been moved from the INT position 7c to another position, that is, whether or not the INT position 7c has been turned OFF. If the INT position 7c remains in the ON state, the process proceeds to step S14. The routine proceeds to step S14 and subsequent routines. When the INT position 7c is turned off, the routine is exited.

  On the other hand, when it is determined in step S18 that the intermittent time instruction mode has been changed by operating the operation knob and the process proceeds to step S20, the intermittent time initial value To set in step S11 and the intermittent time set in step S13 or step S16. A difference ΔT with respect to the time T1 is calculated (ΔT ← To−T1). In step S21, the intermittent time corresponding to the instruction mode selected this time is set as the intermittent time initial value To.

  In step S22, the intermittent time T1 is newly set from the difference between the current intermittent time initial value To and the difference ΔT (T1 ← To−ΔT), and the process returns to step S17.

  As a result, in step S17, the intermittent time T1 (T1 ← To−ΔT), which is shorter by the difference ΔT from the intermittent time initial value To corresponding to the current instruction mode, is output to the timer.

  Accordingly, as shown in FIG. 5, for example, when the first instruction mode when the operation lever of the wiper combination switch 7 is set to the INT position 7c is the SLOW mode, if the MIST position 7b is turned ON from that state, the intermittent time T1 is decreased every time the MIST position 7b is turned ON. Thereafter, when the instruction mode is changed to the fourth mode at time n1, even if the final intermittent time T1 set when the SLOW mode is executed is shorter than the intermittent time initial value To of the fourth mode, Since the first intermittent time T1 is corrected by a value obtained by subtracting the difference ΔT from the initial intermittent time value To, the first intermittent time T1 when the fourth mode is selected is corrected when the SLOW mode is executed. Will be taken over, so the driver will not feel uncomfortable. Therefore, naturally, the first intermittent time T1 when the fourth mode is selected is not set longer than the final intermittent time T1 set when the SLOW mode is executed.

  Next, an example of the intermittent time T1 controlled according to the above-described intermittent time control subroutine shown in FIG. 4 will be described according to the time chart of FIG.

  When the driver sets the operation lever of the wiper combination switch 7 to the INT position 7c, first, a 1-pulse drive signal is output to the motor drive circuit 5, and the wiper bodies 2a and 2b are reciprocated once. Thereafter, an intermittent time T1 is set with an initial intermittent time value To corresponding to the intermittent time instruction mode, and the wiper bodies 2a and 2b are intermittently operated with this intermittent time T1 (indicated by C1 in the figure) as an operation cycle. .

  Thereafter, when the MIST position 7b is turned on with the operation lever, a drive signal of 1 pulse is output to the motor drive circuit 5 using the pulse as a trigger, and the wiper bodies 2a and 2b are reciprocated once. At the same time, the T1 correction value α is set, and a new intermittent time T1 (indicated by C2 in the figure) is calculated based on the latest intermittent time T1 and the T1 correction value α, and set in the timer. Therefore, after the MIST position 7b is turned on, the wiper bodies 2a and 2b are intermittently operated at the operation period of the intermittent time C2 from the time of the ON operation. Then, when the MIST position 7b is turned ON again, a new intermittent time T1 (indicated by C3 in the figure) is calculated based on the latest intermittent time T1 and the T1 correction value α, as described above, and the timer Set to Therefore, thereafter, the wiper bodies 2a and 2b are intermittently operated at the operation period of the intermittent time C3.

  Thus, in this embodiment, when the operation lever of the wiper combination switch 7 is set to the INT position 7c and the wiper bodies 2a and 2b are intermittently operated at the intermittent time T1 according to the instruction mode at that time. When the MIST position 7b is turned on, the intermittent time T1 is corrected to be shorter every time the MIST position 7b is turned on. Therefore, the intermittent time T1 corresponding to the driver's preference and feeling is fixed with the instruction mode fixed. Obtainable.

  Furthermore, since the intermittent time T1 can be adjusted by turning on the MIST position 7b which is normally provided in the wiper combination switch 7, it is not necessary to add new parts and can be handled by existing equipment. The rise in component costs can be suppressed. In addition, the intermittent time T1 can be adjusted by a normal wiper operation, which is convenient.

  7 and 8 show a second embodiment of the present invention. FIG. 7 shows an intermittent time control subroutine. This embodiment is applied in place of the intermittent time control subroutine shown in FIG. 4 of the first embodiment. In addition, since it is the same as that of a 1st form about a component, the code | symbol same as a 1st form is attached | subjected and description by drawing is abbreviate | omitted.

  In the subroutine shown in FIG. 4 described above, until the MIST position 7b of the wiper combination switch 7 is turned ON, the wiper bodies 2a and 2b are intermittently operated at a constant operation cycle. In this embodiment, the MIST position 7b After the intermittent time T1 is corrected to be short, the intermittent time T1 is gradually returned to the original intermittent time (intermittent time initial value To) until the MIST position 7b is turned on again. Is.

  That is, in the subroutine shown in FIG. 7, the same processing as the intermittent time control subroutine shown in FIG. 4 described above is performed from step S11 to step S22.

  If the MIST position 7b is not turned ON in step S14, the process branches to step S23, and the set value k is added to the intermittent time T1 to set a new intermittent time T1 (T1 ← T1 + k). Next, the process proceeds to step S24, where the intermittent time T1 is compared with the intermittent time initial value To. If T1 <To, the process proceeds to step S17, and the intermittent time T1 set this time is preset in the timer memory. If T1 ≧ To, the process jumps to step S25, the intermittent time T1 is set as the intermittent time initial value To, and the process proceeds to step S17.

  The set value k is added every time this subroutine is executed, and the intermittent time T1 preset in the timer memory is sequentially updated. The intermittent time T1 preset in the timer memory is set in the timer when the intermittent time T1 set in the timer is up or when the MIST position 7b is turned on. In this case, the set value k is a minute value, and is set based on the relationship between the calculation cycle and the intermittent time initial value To for each instruction mode set in the MIST position 7b.

  As a result, as shown in FIG. 8, for example, the driver sets the operation lever of the wiper combination switch 7 to the INT position 7c, the instruction mode at that time is the SLOW mode, and the intermittent time set in this SLOW mode. When the wiper bodies 2a and 2b are intermittently operated with T1 (= intermittent time initial value To) as an operation cycle, when the MIST position 7b is turned on (time n2), the T1 correction value α and the intermittent time T1 at that time are Is set to a new intermittent time T1 (T1 ← f (T1, α)). Thereafter, until the MIST position 7b is turned on, the intermittent time T1 is increased at a predetermined rate. When the MIST position 7b is turned on again (time n3), based on the T1 correction value α and the intermittent time T1 at that time, A new intermittent time T1 is set again (T1 ← f (T1, α)). Thereafter, the intermittent time T1 becomes longer at a predetermined rate without turning on the MIST position 7b, and becomes constant when the intermittent time initial value To is reached.

  As described above, in this embodiment, when the wiper main bodies 2a and 2b are intermittently operated with the INT position 7c being set, if the MIST position 7b is turned on, the intermittent time T1 is corrected to be short, and then the intermittent time T1 is Since it is gradually returned to the intermittent time initial value To side at a predetermined rate, for example, the driver needs to adjust the intermittent time T1 to be shortened once with the increase in the amount of raindrops, and then return to the intermittent time initial value To side again. Because there is no, operability is good.

  Further, even when the intermittent time initial value To set at the INT position 7c can be set steplessly by the volume, the wiper device according to the present embodiment can be applied to operate the volume optimally without operating the volume one by one. The intermittent time T1 can be acquired by a simple operation. Further, even when the volume is set to the fastest (FAST mode), the shorter intermittent time T1 can be obtained by turning on the MIST position 7b.

  9 to 11 show a third embodiment of the present invention. FIG. 9 is a block diagram of the vehicle wiper device, and FIG. 10 shows an intermittent time control subroutine. This subroutine is applied in place of the intermittent time control subroutine shown in FIG. 4 of the first embodiment.

  In each embodiment described above, the control operation of the intermittent time T1 when the operation lever of the wiper combination switch 7 is set to the INT position 7c has been described. However, in this embodiment, the intermittent time set by the vehicle speed sensitive wiper is used as the driver. It can be adjusted to suit your taste and sense. Therefore, the present embodiment can be applied to a vehicle including a vehicle speed sensitive wiper.

  As shown in FIG. 9, a vehicle speed sensor 21 that detects the vehicle speed S is connected to the control unit 6. Since the configuration other than the vehicle speed sensor 21 is the same as that of the first embodiment, the same reference numerals as those of the first embodiment are used and the description thereof is omitted.

  In addition, an intermittent time characteristic table as shown in FIG. 2 is stored in the storage unit 12 for each instruction mode (FAST mode, second to fourth mode, and SLOW mode). FIG. 12 shows an intermittent time characteristic table for one mode. As indicated by a solid line in FIG. 8, the intermittent time characteristic table stores an intermittent time initial value To having a characteristic in which the intermittent time gradually decreases as the vehicle speed S is used as a parameter and the vehicle shifts from low speed to high speed.

  When the driver sets the operation lever of the wiper combination switch 7 to the INT position 7c, the subroutine shown in FIG. 10 is started. First, in step S31, an intermittent time characteristic table corresponding to the instruction mode is selected. Next, the process proceeds to step S32, where the intermittent time initial value To is set with reference to the intermittent time characteristic table using the vehicle speed S detected by the vehicle speed sensor 21 as a parameter.

  Then, the process proceeds to step S33, and the intermittent time initial value To is set as the intermittent time T1 (T1 ← To). Subsequently, it progresses to step S34, the intermittent time T1 is preset to the timer memory provided in the memory | storage part 12, and it progresses to step S35.

  The intermittent time T1 preset in the timer memory is set in the timer, and time measurement by the timer is started. Each time the intermittent time T1 is up, a one-pulse drive signal is output to the motor drive circuit 5, and the wiper bodies 2a and 2b are reciprocated only once. In this case, as in the first embodiment, when the operation lever is set at the INT position 7c, the wiper bodies 2a and 2b are first reciprocated once.

  Thereafter, when the process proceeds to step S35, it is checked whether or not the MIST position 7b is turned on. If the MIST position 7b is not turned on, the process jumps to step S39. When the ON operation is performed, the process proceeds to step S36, and a correction value (T1 correction value) α for the intermittent time T1 is set. Note that the method for setting the T1 correction value α is the same as that in the first embodiment described above, and a description thereof will be omitted.

  Next, in step S37, the current intermittent time T1 is set based on the intermittent time T1 and the T1 correction value α (T1 ← f (T1, α)). The method for setting the intermittent time T1 is also the same as that in the first embodiment described above, and a description thereof will be omitted.

  Thereafter, when the process proceeds to step S38, the intermittent time T1 set in step S37 is preset in the timer memory, and the process proceeds to step S39. The intermittent time T1 preset in the timer memory is sequentially updated, and is set in the timer when the intermittent time T1 set in the timer is up or when the MIST position 7b is turned on. Accordingly, unless a new intermittent time T1 is preset in the timer memory, the wiper bodies 2a and 2b are intermittently operated in the same operation cycle.

  Then, when the process proceeds from step S35 or step S38 to step S39, it is checked whether or not the vehicle speed S has been changed based on the vehicle speed S detected by the vehicle speed sensor 21. Whether the vehicle speed S has been changed is, for example, comparing the vehicle speed S detected this time with the vehicle speed S when the previous intermittent time T1 was preset, and whether the difference is within a set range (for example, 5 [Km / h]). Find out.

  When the difference is out of the set range, it is determined that the vehicle speed S has been changed, and the process returns to step S35. If the difference is within the set range, it is determined that the vehicle speed S has not been changed, and the process proceeds to step S40. In step S40, it is checked whether or not the instruction mode of the intermittent time has been changed. If it is determined that the instruction mode has been changed, the process returns to step S31, and the intermittent time characteristic table corresponding to the new instruction mode is displayed. select.

  If the instruction mode has not been changed, the process proceeds to step S41. In step S41, it is checked whether or not the operating lever has been moved from the INT position 7c to another position, that is, whether or not the INT position 7c has been turned OFF. If the INT position 7c remains in the ON state, the process proceeds to step S32. Returning, the intermittent time initial value To is newly set with reference to the intermittent time characteristic table using the vehicle speed S as a parameter. When the INT position 7c is turned off, the routine is exited.

  As a result, for example, in the state where the intermittent time T1 of the wiper bodies 2a and 2b at the INT position is controlled according to the initial intermittent time value To stored in the intermittent time characteristic table shown in FIG. When the MIST position is turned ON at this time, if the intermittent time initial value To at that time is t1, the MIST position is turned ON based on the intermittent time T1 and the T1 correction value α at this time. Is corrected to a value of t2 (steps S36 and S37). Then, when the MIST position is turned ON again within the range of the same speed S, the intermittent time T1 is further corrected to a value of t3.

  In this case, as shown by the broken line and the alternate long and short dash line in FIG. 11B, when the MIST position is turned on, the entire characteristic of the intermittent time initial value To is shifted to the t2 and t3 sides. The intermittent time T1 may be set based on the subsequent intermittent time initial value To.

  Thus, in this embodiment, the intermittent time T1 of the vehicle speed sensitive wiper is corrected by shortening the intermittent time T1 by turning ON the MIST position 7b, so that the driver does not change the instruction mode one by one. Intermittent time T1 adapted to the driver's preference and sense can be obtained, which is convenient. Moreover, since it coped with the existing equipment without adding a new part, the rise in parts cost can be suppressed.

  By the way, this embodiment can be applied to a raindrop sensitive wiper by connecting a raindrop sensor to the control unit 6 instead of the vehicle speed sensor 21. In this case, the intermittent time characteristic table for each instruction mode stored in the storage unit 12 uses the raindrop amount detected by the raindrop sensor as a parameter, and the intermittent time as the raindrop amount shifts from the smaller to the larger. An intermittent time initial value To having a gradually decreasing characteristic is stored. When the MIST position 7b is turned on, the sensitivity of the raindrop sensor is increased each time, and as a result, the intermittent time T1 is corrected to be short.

Block configuration diagram of the vehicle wiper device according to the first embodiment Same as above, explanatory diagram of instruction mode provided at INT position Same as above, flowchart showing an intermittent time control determination routine The flowchart showing the intermittent time control subroutine Same as above, time chart showing intermittent time control status Similarly, a time chart showing the operation state of the timer when the wiper combination switch is set to the INT position and the operation state of the timer when the MIST position is turned ON. The flowchart which shows the intermittent time control subroutine by a 2nd form. Same as above, time chart showing intermittent time control status Block diagram of a vehicle wiper device according to a third embodiment The flowchart showing the intermittent time control subroutine (A) is an explanatory view of an intermittent time characteristic table applied to a vehicle speed sensitive wiper, (b) is an explanatory view showing an intermittent time characteristic when the MIST position is turned on in the intermittent time characteristic table of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Window glass 2a, 2b ... Wiper main body 4 ... Wiper motor 5 ... Motor drive circuit 6 ... Control unit 7 ... Wiper combination switch 7a ... OFF position 7b ... MIST position 7c ... INT position 7d ... LO position 7e ... HI position 11 ... Intermittent Time calculation unit 12 ... storage unit 21 ... vehicle speed sensor ΔT ... difference α ... correction value S ... vehicle speed T1 ... intermittent time To ... intermittent time initial value k ... set value

Claims (5)

A wiper body that wipes the windshield of the vehicle,
Driving means for operating the wiper body;
Switch means having a plurality of switch positions for selecting the operation of the wiper body;
Control means for intermittently operating the drive means when the intermittent position is selected by the switch means,
For the vehicle, wherein the control means includes an intermittent time calculation unit that corrects the intermittent time to set a new intermittent time when another switch position is selected in a state where the intermittent position is selected. Wiper device. The switch means is a wiper combination switch,
2. The vehicle wiper device according to claim 1, wherein the other switch position is a mist position in which the wiper body is reciprocated once when it is turned on. A plurality of instruction modes with different initial values for the intermittent time are provided at the intermittent position,
When the instruction mode is changed during the intermittent operation of the wiper body, the intermittent time calculation unit subtracts the difference between the initial intermittent time value before the change and the intermittent time from the initial intermittent time value after the change. 3. The vehicle wiper device according to claim 2, wherein the first intermittent time is set. The said intermittent time calculating part performs correction | amendment which returns this new intermittent time to the said intermittent time initial value in steps, when the new intermittent time which correct | amended the said intermittent time was set short was set. The vehicle wiper device according to any one of 1 to 3. A vehicle speed sensor for detecting the vehicle speed is connected to the control means,
5. The vehicle wiper device according to claim 3, wherein the intermittent time calculation unit variably sets the initial value of the intermittent time based on a vehicle speed detected by the vehicle speed sensor.

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