JPS60121153A - Intermittent wiper apparatus - Google Patents

Abstract

PURPOSE:To improve the function of a wiper apparatus by setting the intermittent cycle of a washer switch to the max. intermittent cycle in the instantaneous opening of said switch during driving of a motor and storing the intermittent cycle right before closing of intermittent switch in closing again same switch after opening thereof to control a motor in this cycle. CONSTITUTION:When a washer switch 3 is closed instantaneously, this operation is judged in step S8 to select step S9. While a wiper motor 200a is driven step S15 is selected, and memory tc for intermittent cycle is rewritten to the max. intermittent cycle and thereafter the motor is intermittently driven in this cycle. When the intermittent switch 2a is opened from the closed condition and then again closed, steps S3, S4, S6 and S7 are sequentially executed and then steps S3, S4, S6 and S7 are repeatedly executed. And the content in the memory tc for the intermittent cycle is stored and kept in the intermittent cycle when the intermittent switch 2a is opened and the wiper motor 200a is intermittently driven in the intermittent cycle stored in closing again said switch.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a wiper device for wiping and cleaning water droplets etc. adhering to windowpanes of automobiles, etc., and particularly relates to a wiper device for wiping and cleaning water droplets etc. adhering to windowpanes of automobiles, etc. Regarding a wiper device.

[Prior art]

Normally, wiper devices for automobiles can adjust the wiping frequency in two stages, high speed and low speed, and in luxury cars, intermittent wiper devices that perform wiping operations intermittently at intervals of several seconds to several seconds during light rain. It is equipped with. The time interval of the wiping operation, that is, the intermittent period, is available in fixed and variable types.Furthermore, in the variable type, the wiping operation is performed at an intermittent period corresponding to the position of the potentiometer that operates on the dial.
There are some types that allow the user to directly set the desired intermittent wiper cycle (hereinafter referred to as a dial-type intermittent wiper device).

The rear right intermittent wiper device (hereinafter referred to as a two-cycle temporary memory type intermittent wiper device) is composed of a wiper motor circuit, an Itj1 intermittent switch, a washer switch, and a control circuit, as will be described later. and.

The control circuit measures and stores the time from the arbitrary wiping operation point of the wiper motor circuit when the intermittent switch starts the multi-operation to the point in time when the washer switch is operated after the intermittent time desired by the user has elapsed. This time is considered an intermittent cycle, and the wiper motor is compared to an intermittent wiper device.
This is advantageous in that it can be set tangentially.

However, in this intermittent period temporary memory type intermittent wiper device, the intermittent period can only be 61.7 knots in one direction, that is, in the direction in which the period is shortened, and conversely, the shortened period can be lengthened. At the time of PC, turn on the intermittent switch once,
Execute the reset operation of opening %L, closing again,
++ Jj 几, I was trying to execute the setting of ``intermittent cycle'' as described above. Therefore, when the intermittent switch is opened, the intermittent period is automatically preset, and the maximum intermittent period (
When the intermittent switch is opened and closed again like the above-mentioned dial type intermittent wiper device, the previously set l, -iJ intermittent cycle is memorized.

It was not possible to perform intermittent work again during that period.

In order to provide such an intermittent cycle memory function to an intermittent cycle temporary memory type intermittent wiper device, a dedicated wiper device is also required, which has the drawback of increasing the size and bulk of the device. Ta.

[Summary of the invention]

This invention has been developed in consideration of these points, and is capable of adding the above-mentioned intermittent cycle function to the above-mentioned intermittent cycle temporary memory type intermittent wiper device without adding a dedicated switch to the intermittent cycle wiper device. An object of the present invention is to provide an intermittent wiper device having a memory function.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic block diagram showing an embodiment of the present invention, and (2) is a known wiper motor circuit that automatically causes a wiper (not shown) to perform one reciprocating wiping operation when the wiper is activated once. When the coil 100a of the windshield relay 100 is energized, the windshield relay switch 100b switches from the solid line position to the broken line position in the figure, thereby energizing the wiper motor 200a and starting the wiper operation. Once the wiper starts operating, auto stop switch 2
00b switches from the device shown in the solid line to the position shown in the broken line. Therefore, even if the coil 100a is de-energized and the wiper relay switch 100b returns to the solid line position, the wiper motor 2
00a continues to be energized, and when the wiper has made one reciprocation and reached the predetermined position, the auto stop switch 200 is activated.
b returns to the position indicated by the solid line in the figure, power to the wiper motor 200a is cut off, and the wiper stops.

2 is a wiper switch, which stops the wiper motor circuit 1 at the 0FFJ position and at rI, which also operates intermittently.
NTJ position U) 1, Operate at low speed r LOWJ position,
Operate at high speed [One of the four HIGHJ positions can be set arbitrarily. Here, in order to simplify the explanation, the wiper switch 2 is set at l'-OF'FJ position and l'-INT position.
J position, especially in the figure,
The part surrounded by the broken line is called the intermittent switch 2a,
Close the time when l'-INTJ position UK is set, [0F
The time when the FJ position is set is defined as opening.

Reference numeral 3 denotes a washer switch that operates a washer fluid injection device (not shown), which is a normally open momentary switch. Normally, when it is closed for a few seconds to operate the washer motor 4, the washer fluid is released as will be described in detail later. 5 is a control circuit which detects the set position of the wiper switch 2 and the operation of the washer switch 3 and controls the wiper motor circuit 1, and is comprised of a microcomputer system. The contacts 2ol to 2o4 of the wiper switch 2 and the contact 301 of the washer switch 3 are connected to the control circuit 5. Other contacts 205 are connected to the control circuit 5.
．． 302 is grounded. The coil 100a of the wiper motor circuit 1 is excited by the amplifier circuit 6 which amplifies the starting signal 5a from the control circuit 5. Also, wiper motor 2
The connection point between the wiper relay switch 100b and the wiper relay switch 100a is input to the control circuit 5, and the operating state of the wiper motor 200a can be known by checking the potential at this connection point.

Next, its operation will be explained.

2a and 2b show an operating element 1i of a microcomputer (not shown) used in the control circuit 5 shown in FIG.
FIG. 2a is a flowchart showing the main routine,
FIG. 2b shows a 70-chart of the interrupt handling routine. FIG. 3 shows an intermittent switch 2a.

5 is a timing chart illustrating the operation of the washer switch 3 and the control circuit 5. FIG.

When the control circuit 5 is supplied with power, it performs a so-called power-on reset operation! 7. Execution of the program begins from the starting point PI in FIG. 2a.

First, in step SI, 11) j missing) memory tcK for temporarily storing the kJ period has a maximum of 1. jl missing period Tmax
(for example, 15 seconds), and in step s2, the timer memory t, which is incremented from time to time, is cleared to zero as one hour passes.

Next, in step S3, the intermittent switch 2a.

The dynamic V+= of the washer switch 3 is checked and if the 1 intermittent switch 2a is open, the memory L is cleared to zero in step s5 as in step S2, and the memory L is cleared to zero in step S3.
Return to step S3 and repeat steps S3 to S5.

Now, time axis 1 in the timing chart shown in Figure 3.
] At time t above, when the intermittent switch 2a changes from open to closed, in step 84, step S6
is selected tt7. . In this step S6, the wiper activation signal C is activated for a predetermined time (approximately 0.7 seconds as described above).
The output process is executed, and in step S7, the timer memory t is cleared to zero, and the process returns to step S3. As a result, the wiper activation signal C-'' shown in FIG. 3 is activated at time 1.
At ``ONt'' for a predetermined period of time, the wiper motor circuit 1 is activated.

After executing step S7, the process returns to step S3. After executing this, in step S4, step S8 is selected, and now, assuming that the washer switch 3 does not perform an instantaneous closing operation (described later), Return to S3, and thereafter step S3. Repeat steps S4 and S8.

On the other hand, the control circuit 5 executes the interrupt processing routine shown in FIG. 2b in parallel with the execution of the main routine shown in FIG. 2a. In this Figure 2b.

P2 indicates an interrupt start point, and when the timer memory t in the fljlJ control circuit 5 matches the intermittent cycle memory tc, execution starts from the start point P2 one interrupt before.

First, in step 5100, a wiper activation signal C is outputted as in step S6 of FIG. 2a, and step 51
At step 01, the timer memory t is cleared to zero, and the process returns to the main routine of FIG. 2a from return point P3. Therefore, this interrupt processing routine starts the wiper motor circuit 1 at the intermittent period t, c4σ.

Now, in FIG. 3, the wiper motor circuit 1 operates at the maximum intermittent cycle Tmax, and after starting at time t2, the user switches the washer switch 3 to 1b at time t3.
Assume that it is closed at time i (for example, about 0.3 seconds). That is, the maximum intermittent cycle Tmax (approximately 1
5 seconds), if you judge that water droplets etc. cannot be wiped away sufficiently and want to set the intermittent power period tc to a desired value, operate as described above. The time T from the time t2 when the washer switch 3 starts to the time t4 when the washer switch 3 ends is set as the subsequent intermittent cycle tc. , washer switch 3
The instantaneous opening operation is determined, and step 7'S9 is selected. In step S9, it is determined whether the wiper is in the wiping operation by detecting the energization state of the wiper motor 200a. Assuming that wiper motor 200a is not operating now, step SIO is selected. This step SIO
, the timer memo VtO value indicating the time from time t2 to time t, -1 is compared with the lft constant time Tm1n (for example, 3 seconds, hereinafter referred to as the minimum intermittent period).
And the minimum intermittent period Tn+in! If it is, step S
ll, and store the minimum intermittent cycle T in the intermittent cycle memory tc.
m1n is set and the process returns to step S3. Assuming that the value of one hour T is greater than or equal to the minimum intermittent period T m i n , step S12 is selected in step 810, the wiper activation signal C is output at time t4 as in step s6, and the timer is activated in step S13. In step 814, the value %pIJ, time T, of the memory t for the timer is stored in the memo 'Jtc for the 1st period.
is cleared to zero and returns to step s3. Therefore, from now on, the interrupt processing routine shown in FIG. 2b of the intermittent cycle Tlf71K is executed and the wiper operates intermittently.

After setting the intermittent cycle as described above, if the amount of water decreases and the user wants to lengthen the intermittent cycle, the user can instantaneously close the washer switch 3 while the wiper is performing the wiping operation. The period is the maximum intermittent period Trnax K
You can set it.

At time t, the wiper start signal C is output, the wiper motor 200a starts energizing, and the washer switch is activated until the auto stop switch 200b is de-energized (usually about 1 second). If No. 3 executes the instantaneous closing operation, the instantaneous closing operation is determined in steps S 8 t S 9 and step S 15 is selected. Here, the contents of the memory tc for one intermittent cycle are rewritten to the maximum intermittent cycle Tmax tic, and the process returns to step S3. Therefore, from now on, the wiper motor circuit 1 has a maximum intermittent cycle Trna
Since the washer switch 3 is activated at time t3, if the washer switch 3 is instantaneously closed again at time t, a new intermittent cycle T is set in the intermittent cycle memory tc. Ru.

Also, when the wiper is wiping and the washer switch 3 includes at least the instantaneous closing operation start operation (operation switching from opening to closing), the maximum intermittent cycle is 1'max. You may also set it.

While the wiper is operating according to the intermittent cycle T2, the vehicle or the like is temporarily stopped, the intermittent switch 2a is opened at time t8, the vehicle is started again after a while, and the intermittent switch 2a is closed at time to. sa,
S 4 , S 6 , S 77>: IIIN Next Execution, Step 83. 'S4 and 8B are repeatedly executed.

Therefore, the contents of the 111 intermittent cycle memory tc are recorded at time t8 when the intermittent switch 2a is opened. This value remains unchanged even when the intermittent switch 2a is open, and when it is closed again (time to), the intermittent cycle T indicated by this value is changed, and the shifter activation signal C is activated. Output.

Although not shown in FIG. 2a, if the washer switch 3 is closed for a predetermined period of time (for example, about 1 second) or more, the washer motor 4 works to inject the washer liquid, and furthermore, for the predetermined time period. The closing is detected by the control circuit 5, and the wiper motor circuit 1 is activated at high speed for a predetermined period of time.

In this invention, the washer switch 3 having the above-mentioned function is also used for setting the intermittent cycle, but the opening time required for setting the intermittent cycle is shortened, and the opening time required for setting the intermittent cycle is shortened. If there is, some washer motor 4
Even if the washer liquid is activated, the washer fluid is not sprayed because the load on the washer spraying device is heavy.

In the above explanation, the intermittent switch 2a has been explained as a switch that can be set to either the ``0FFJ'' position of the wiper switch 2, or the ``L'-INTJ'' position.
The OWJ position and the HIGHJ position are also regarded as the JOF'F'J position.For example, when the intermittent switch 2a switches from the 11NTJ position to the LOW position 14, and then returns to the INTJ position, the intermittent cycle is memorized. You can leave it as is.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when the wiper motor circuit 1 detects the instantaneous closing operation of the washer switch 3 during the wiping operation, the subsequent intermittent period is set to the maximum intermittent period TrnaxlC. f13 weight large cycle setting means (
Mainly step S4. S8゜S9. S15, after the intermittent switch 2a is opened from the open state (time ta)
, angle, if set to closed state (time to),
The wiper motor circuit 1 is provided with intermittent storage means (mainly steps 84 to S8) for storing the last intermittent cycle (intermittent cycle at time t) in the immediately preceding closed state and thereafter starting the wiper motor circuit 1 according to this intermittent cycle. Therefore, it is possible to improve the function of the intermittent wiper device without adding any dedicated switch.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of the present invention, FIGS. 2a and 2b are flowcharts explaining the operation of the control circuit shown in FIG. 1, and FIG. 3 is a flow chart showing the operation of the control circuit shown in FIG. 1. 5 is a timing chart illustrating the operation of the control circuit. 1... Wiper motor circuit, 2... Wiper switch,
2a...Intermittent switch, 3...Washer switch, 4...Washer motor, 5...Control circuit. In the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2b Procedural Amendment 1. Display of the case Japanese Patent Application No. 58-228679 2, title of the invention Intermittent wiper device 3, person making the amendment Relationship to the case Patent applicant address 2-2-3 Marunouchi, Chiyoll-1-ku, Tokyo Name ( 601) Mitsubishi Electric Co., Ltd. Representative Hitoshi Katayama 4, Agent address 2-3 Marunouchi 2-1, Chiyoguchi-ku, Tokyo 5, Mitsubishi Electric Co., Ltd. Details of the invention in the specification subject to amendment Explanation column 6 Contents of amendment (1) Change “s15 and,” on page 15, line 13 of the specification to r
S 1'5),'' is corrected. (2) "Intermittent storage means" on page 15, line 19 is corrected to "intermittent periodic storage means."

Claims (1)

[Claims] (1) A wiper motor circuit that automatically performs one reciprocating wiping operation when activated, an intermittent switch that instructs the above wiper motor circuit to start intermittently, and a washer name inch that instructs the Falacia liquid injection device to operate. and. In an intermittent windshield device comprising a control circuit that detects the operation of the intermittent switch and the washer switch and controls the wiper motor circuit, the control circuit performs the first opening operation of the intermittent switch after power is supplied. an initial starting means for starting the wiper motor circuit at a predetermined maximum intermittent cycle while the intermittent switch is in the open state; If an instantaneous opening operation of the washer switch is detected during that time, the time from the latest wiper motor circuit starting point before the operating point to the operating point of the washer switch is memorized, and from then on, the above operation is performed at each time interval. An intermittent cycle setting means for activating a wiper motor circuit.When the wiper motor circuit detects the IR opening/closing operation of the washer switch during the wiping operation, the intermittent cycle thereafter is set to the maximum intermittent cycle, and the intermittent cycle is set to the maximum intermittent cycle according to the cycle. A maximum intermittent cycle setting means for starting the wiper motor circuit, and when the intermittent switch is set from an open state to a closed state again after opening, the last intermittent cycle in the immediately previous open state is memorized, and from then on An intermittent wiper device characterized in that it is a control device comprising means for starting the wiper motor circuit according to the intermittent cycle.