JPS62187635A - Control unit for wiper device - Google Patents

Abstract

PURPOSE:To ensure the sufficient time allowed for power generation braking as well as to prevent cover-current from flowing into an armature circuit by delaying the transfer of drive signals when the rotational direction of a wiper motor is switched over. CONSTITUTION:An output signal from a wiper blade position detector 104 detecting the operating position of a wiper blade, is selected by a selection circuit 105, and said circuit 105 is switched over by a selection command circuit 106 depending on the output signal from a wiper actuating switch 103 which is to be used for selecting the operating condition of a wiper motor 101. Wiper motor drive signals are outputted from a drive signal output circuit 107 based on the output signal from both of the selection circuit 105 and the wiper actuating switch 103. Furthermore, a normal and a reverse signal are outputted from a memory circuit 108 depending on the signal from the selection circuit 105. And a normal/reverse selection circuit 109 is switched over based on said normal and reverse signals for outputting the drive signal with a certain time delayed by means of either a time interval circuit 41 or 42.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a wiper device that reciprocates the windshield surface of a vehicle such as an automobile.

[Conventional technology] Conventionally, Rise Up 1! A wiper device has been proposed (Japanese Patent Laid-Open No. 59-2959). Here, rise-up Rti4 refers to a rise-up Rti4 that is applied to the wiper device that wipes the windshield surface, and when the wiper operation switch is turned off, the wiper blade is lowered further below the lower limit position of the wiper blade's wiping range. It refers to the structure. This rise-to-dawn structure is used, for example, as a means for storing the wiper blade under the hood when not performing a wiping operation.

In the wiper device disclosed in JP-A-59-2959, the wiper blade is controlled to reciprocate by repeatedly rotating the wiper motor in the forward and backward directions within a predetermined angle range, thereby mechanically creating a state in which it can rise up. It is configured so that it can be achieved.

[Problems to be Solved by the Invention] According to the wiper device described above, the wiper motor repeatedly rotates forward and reverse within a predetermined angle range. In order to repeat normal rotation and reverse rotation, it is necessary to reverse the direction of application of the supply voltage to the armature \7 when the wiper motor is reversed. This I-Samurai short-circuited both ends of the armature of the wiper motor, which had been rotating in the forward direction, and performed dynamic braking. A reverse voltage is applied from For this reason, in the invention disclosed in JP-A No. 59-2959, flywheel diodes are connected to both ends of the relay coils so that the energization times of the two relay coils overlap to apply dynamic braking. In some cases, the time setting using the flywheel diode did not provide sufficient dynamic braking. In this case, a reverse voltage is applied while the back electromotive force of the armature during forward rotation is not sufficiently attenuated, so the starting current for starting the reversal resulting in this reverse voltage and the current due to the back electromotive force are It will flow to the armature circuit,
These currents are superimposed and flow to the relay contacts for switching. As a result, excessive current flows through the relay contacts, posing the problem of significantly shortening the life of the relay contacts.

An object of the present invention is to perform effective dynamic braking when the motor is reversed in a wiper device that operates by rotating the wiper motor in the forward and reverse directions, and to prevent excessive current from flowing through the relay contact that switches between forward and reverse directions. It is an object of the present invention to provide a control device for a wiper device that realizes the above-mentioned operation using a simple and novel control circuit consisting of the following.

[Means for Solving the Problems] The basic configuration of the present invention is conceptually illustrated by a block diagram as shown in FIG. According to FIG. 1, the wiper device control device according to the present invention includes a switch device 102 that switches the direction of voltage applied to the wiper motor 101, and a forward rotation switch 102a, etc. is controlled by a signal that controls the switch device 102. A wiper operation switch 103 for selecting the operating state of the wiper motor 101, which is located in a wiper device that swings the wiper blade for wiping by operating a reverse switch 102b to avoid forward or reverse rotation of the wiper motor 101; 1 A gate 33 for stop IA which operates in correspondence with the No. 1 Noiva blade and selects the wiper blade position detection Z104 for detecting the operating position of the wiper blade and the signal generated by the wiper blade position detector 104. Inverted signal gate 3
4 and a wiper operation switch 103.
The output signals of the wiper operation switch 103 and the selection circuit 105 are input to the selection command circuit 106 which determines the operation of the wiper motor 101.
Drive signal output circuit 1 that outputs a drive signal to operate the
07, a memory circuit 108 which inputs at least the output signal of the selection circuit 105 and outputs a signal instructing either forward rotation or reverse rotation; a forward/reverse selection circuit 109 that selects the forward/reverse rotation selection circuit 109; and a time limit circuit 41 that delays each of the drive signals supplied to the forward/reverse switch 102a or the reverse switch 102b by a certain period of time via the forward/reverse selection circuit 109.
．． 42.

[Function 1] According to the present invention, when the wiper blade 101 is rotated forward or reverse in order to prevent the wiper blade from swinging, the transmission of the drive signal is delayed at 13 when switching the rotation direction. In particular, ensure sufficient time for dynamic braking,
In addition, the generated current generated in the wiper motor 101 and the applied current applied to the wiper motor 101 are prevented from being superimposed, thereby preventing excessive current from flowing through the armature V circuit.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is an electrical circuit diagram showing one embodiment of the present invention. In Fig. 2, 1 is a vehicle battery, 2 is an ignition switch, and 3 is a fuse, which are connected in series.
When ignition switch 1 is turned on, battery 1
Power is supplied to each part of the electrical circuit. Electric power from the on-board battery 1 is transferred to the armage 't' 101a of the wiper motor 01 via relay contacts 5b, 6b, and 43b, and is also transferred to the forward rotation relay coils r1 and r2 coils 5a and the reverse rotation relay 5a by conduction between transistors TT and 1. The signal is supplied to the coil 6a, and further to the intermittent operation control circuit 7, the wiper operation switch 103, the nodes 12 and 13 connected to the contact point 10°11 of the wiper blade position n detector 104, the selection command circuit 106, etc.

The wiper operation switch 103 is shown in the form of a wiring table in the figure, and has four settings for controlling the wiper motor 01: standstill (OFF>), intermittent operation (INT), low speed operation (LOW), and B speed operation (HI). It has a selection position and seven connection terminals S, +8. The control circuit 7 for
are connected to each other, and terminal E is grounded. Connection relationships between terminals when each position is selected are shown in a connection table.

The wiper blade position detector 104 includes a cam plate (not shown in FIG. 2), an electrode plate 16 of the shape shown in the figure provided on the cam plate, and an insulating part 17 made of, for example, resin formed on the surface of the electrode plate 16. It consists of The cam plate, electrode plate 16, and insulating portion 17 rotate integrally around @18. The electrode plate 16 has a fan-shaped protrusion 16a having an angle 2θ0 on its outer edge;
An inward protrusion 16b is formed at the inner edge corresponding to the inner edge. Three contact points 10.11.19 are fixed in contact with the electrode plate 16, as shown. The contact point 19 is always in contact with the electrode plate 1-16 and is grounded, and the contact point 11 is for detecting the stop position of the cam plate (corresponding to the retracted position of the wiper blade) and is connected to the inward protrusion 1). Provided at a contact position, contact I
nl0 is for detecting the inverted position of the cam plate (corresponding to the 1ζ limit position of the wiping range of the wiper blade), and is provided at both edges of the fan-shaped projection 16a, which is provided so as to be in contact with the fan-shaped projection 16a. The upright position of BO sets the inversion position.

Figure 3 shows the installation relationship between the wiper motor 101 and the cam plate. 2o is a cam plate, and teeth formed on the entire periphery of the cam plate 20 mesh with a worm gear 21 installed on the output shaft of the wiper motor 101, whereby the cam plate 20 is driven to rotate around the shaft 18. Ru. In the figure, 16 is electrode plate 1-. 17 is an insulating part, which is fixed to the cam plate 20, and 10, 11.1
9 is a contact point, and 101a is an armature. The rotational motion of the cam plate 2o is converted into the swinging motion of the wiper blade via a link mechanism that will be described later. cam plate 20
There is a certain correspondence between the rotational movement of the wiper blade and the one-stroke movement of the wiper blade.

FIG. 4 is a schematic diagram showing the connection relationship between the wiper blade position detector 104 and the wiper blade.

The shaft '18 of the cam plate and the rotating shaft 22a of the crank arm 22 are connected in the illustrated positional relationship and rotate integrally. Therefore, when the cam play 1-20 rotates, the crank arm 22 rotates around the rotating shaft 22a in the same direction, in the same phase, and at the same speed. crank arm 22
The tip of the wiper blade 2 is connected to the wiper blade 2 via the connecting rod 23.
The lower end of the wiper arm 24a of No. 4 is connected to the lower end of the wiper arm 24a at each connecting portion using a rotating pair. Wiper arm 24a
Since the lower part of the wiper blade 24 is bent at a predetermined angle at +3 to the rotation center 24b, when the crank arm 22 rotates, the wiper blade 24 performs a swinging motion within a predetermined wiping range (K).

In the figure, position A of the wiper blade 24 indicates the retracted position, position faB indicates the lower limit position of the wiping range, and position C indicates the upper limit position of the wiping range. Corresponding to positions A, B, and C,
Positions A', 8', and C' of the connection points with the connecting rod 23, and positions of the crank arm 22 jet A II, G/l
, C+7 are shown. In this embodiment, during the wiping operation of the wiper blade 24, the crank arm 22 repeats reversals at an angle of θ1, and each reversal operation causes the wiper blade 24 to swing back and forth from B→C→B. It is composed of

Next, the connection relationship of the circuit will be explained according to FIG.

106 is a selection command circuit that instructs selection of either stop position detection or reversal position detection of the cam plate 20;
It is composed of a 1J63 human-powered OR gate 30 with an inverter attached to only one input terminal, and NOR gates 1 to 31. 01 (The input terminal that connects the inverters 1 to 30 is connected to the C electric it≦Mi side and the terminal C1 through the resistor R1,
The other input terminals are terminals +1, . . . of the wiper operation switch 103 via resistors R, R, respectively. Connected to +2. NO
The output of the control circuit 7 and the output of the OR gate 30 are input to the input terminals of the R groups 1 to 31 via the resistor R4.

105 is a selection circuit, and AND gates 33.3 are arranged in parallel.
Consists of 4. A selection signal S1 output from the selection command circuit 106 is given to the selection circuit 105. AND gate 3
The selection signal S1 is directly input to one input of 3, and the AND
An inverted selection signal 81 is input to one input of the gate 34 via an inverter. Therefore AND gate 33.3
4 is in an open state. In addition, the other input terminal of A N D Goo 1-33 is connected to contact point 1 via resistor R5.
1, and the other input terminal of the AND gate 34 is connected to the contact point 1o via a resistor R6.

The AND gate 33 works as a stop signal gate, and the AND gate 34 works as an inverted signal gate.

Reference numeral 107 denotes a drive signal output circuit, which is composed of an OR gate 36. The OR gate 36 has five input terminals, and the control circuit 7
, terminal +1. +2, and the output signals of AND gates 33 and 34 are input. The drive signal 52 (H level) output from the drive signal output circuit 107 is supplied to the forward/reverse selection circuit 109 .

i [The reversal selection circuit 109 selects two AND
Consists of goo 1-38.39, AND gate 38.39
A drive signal S2 is input to one input terminal of each of the two input terminals.

108 is a memory circuit consisting of a D flip-flop.

The inverted signal S3 output from the AND gate 34 is input to the CP terminal of the memory circuit 108, and the selection signal S1 is input to the C terminal. The output Q of the memory circuit 108 is supplied to the other input of each of the AND gates 38 and 39 of the forward/reverse selection circuit 109. The output Q is inputted manually via an inverter at the AND gate 38, and directly inputted to the three AND gates. In the memory circuit 108, the inverted signal S3 means a falling state that occurs when the contact point 10 contacts the electrode plate 16, and this inverted signal @$3 (T1→
Each time L) is input, the state of the output Q is inverted. Contact point 1
In the illustrated initial state where 0 exists at the center of the fan-shaped protrusion 16a of the electrode plate 16, the output Q is at the L level. Depending on the state of the output Q of the memory circuit 108, one of the AND gates 38 and 39 is selected to be open.

The output of the AND gate 38 is applied to the base of the transistor Tr1 via the timer circuit 41 and the resistor R7. When the transistor "rl becomes conductive, the forward rotation relay coil 5a is energized, and the relay contact 5b, which is normally connected to the ground side, is connected to the power supply side.

The output of the AND gate 39 is applied to the base of the transistor "r2" via the timer circuit 42 and the resistor R8. When the transistor "r2" becomes conductive, the reversing relay coil 6a is energized, and the relay contact 6b, which is always connected to the ground side, is energized. is connected to the power supply side. The timer circuits 41 and 42 form a short circuit to secure time for dynamic braking when the rotation direction of the wiper motor 101 is changed, and also to ensure time for dynamic braking.
This is to set a time lag for switching the relay contacts 5b and 6b after the current has decreased.

That is, when the outputs of the AND gates 38 and 39 reach 1 level, the transistor TT is cut off after a predetermined time t1ill, and on the other hand, when the outputs of ANDr1 and t-38 and 39 reach 1 level, the transistor TT immediately becomes conductive. do.

rl・r2 Also, 43a is a relay coil that is energized when the wiper operation switch 103 is selected to the 1-11 position. When the relay coil 43a is energized, the relay contact 43b, which is always kept in the LOW state, becomes (] 1 state.

Next, the operation of the wiper device by the control device having the above circuit configuration will be explained with reference to FIGS. 2, 4, and 5.

In the initial state shown in Figure 2 (■ in Figure 5), N OR
The outputs of groups 1 to 31 are 1-level, and the output Q of the memory circuit 108 is trubel. Turn on the ignition switch 21 and turn the wiper operation f1 switch 103 to LOW.
When the position is selected, the terminal - (B and terminal +1 are connected, and one input of the OR gate 30.36 becomes the torque signal via the resistor R3. The wiper operation switch 103 is selected in the LOW position. The AND gate 34 is held open via the OR gate 30 and the NOR gate 31, and the AND gate 38 is held open by keeping the output Q of the memory circuit 108 at the torque level. The drive signal S2 output from the groups 1 to 36 passes through the AND gate 38 and is sent to the timer circuit 41.
, is input to the base of the transistor "rl" through the resistor R7.Thereby, the transistor T1.1 energizes the foundation-through relay coil 5a and connects the relay contact 5b to the terminal on the power supply side. is relay contact 43
A current is applied from the on-vehicle valve 1 via b, and the wiper motor 101 starts normal rotation. When the wiper motor 101 starts to rotate normally, the wiper blade 24 reaches the retracted position ΔJ:
As the electrode plate 16 rotates, the electrode plate 16 and the insulating section 17 integrally rotate in the direction of the direction of rotation via the cam plate 20.
The contact with 6a is released, and the contact point 10 becomes the trubel. When the wiper motor 01 rotates normally, the contact point 10 is again the other edge B of the fan-shaped projection 16a. continues until it touches (
Figure 5 ■). During this time, the wiper blade 24 is
+8, and one reciprocating wiping operation is performed.

The contact point 10 is the other edge B. When the contact point 10 contacts the fan-shaped protrusion 16a (FIG. 5), the contact point 10 becomes zero potential and an inverted signal S3 is generated. This inverted signal 83 is the AND gate 3
4 to the CP0iifl child of the storage circuit 108, and changes the output Q to a torque signal. This allows A
By closing the ND gamer 38 and opening the AND gate 39, the drive signal S is sent to the timer circuit 42.
, to the base of transistor 'r2 via resistor R8, energizes relay coil 6a, and connects relay contact 6b to the power supply side terminal. On the other hand, even if the output of the AND gate 38 changes from torbel to torbel, the relay contact 5b is not immediately switched to the ground side due to the action of the time limit circuit 41, but is held on the mold source side for a certain period of time t1. Since both terminals of the armature 101 during this time period are short-circuited via relay contacts 5b and 6b, dynamic braking occurs for a predetermined period of time, and during this period, the generated current generated by the wiper motor 101 decreases through the short circuit. The normal time L1 is set so that the generated current I reaches 20% of the maximum peak value I for a time ax of 1 or more as shown in FIG. When the time t1 elapses, the output of the time limit circuit 41 becomes a torque level, and the relay contact 5k) is connected to the ground side via the transistor T relay coil 5a. the result,
A starting current flows through the armature 7101 from the relay contact 6b toward the relay contact 5b, and the wiper 101 starts reverse rotation. When the wiper motor 101 starts reverse rotation, the electrode plates 1 to 16 rotate in the G direction due to the above-described configuration, and the wiper motor 101 and the electrode plates 1 to 16 rotate in the G direction.
The rotation continues until the contact point 10 again contacts the other edge Bo (FIG. 5 - ). When the contact point 10 comes into contact with the edge 13o, an inverted signal>t33 is generated, and the output Q of the memory circuit 108 is set as the trubel (Fig. 5■), and the forward/reverse private selection 111! Based on the action of circuit 109, relay contact 5 [
) is connected to the power supply side, and after t1 set by the time limit circuit 42, the relay contact 6b is connected to the ground side. In this case, even if J3 is used, it seems that the generated current is reduced by a short circuit.
I try to apply forward rotation voltage.

While the cam plate 20 repeats normal rotation and reverse rotation within the range determined by the edges B and Bo by the above operation, the crank arm 22 repeats the same rotation corresponding to the cam plate 20, and the wiper blade 24 repeats the same rotation for each rotation (angle θ1). The rotation center 24
Avoid going back and forth from B to C to B once around a. When changing the direction of rotation of the wiper motor 01, first the armature 101a
Dynamic braking is performed by making the potentials of both terminals equal and short-circuiting them.
After the photoelectric current is reduced below a predetermined value, a voltage for reversal is applied. This allows energization of 1f when switching relay contacts 5k) and 6t)! It is possible to significantly lengthen the life of the relay contact by reducing the amount of contact.

Next, when the wiper operation switch 'f-103 is selected to the OFF position while the wiper motor 101 is rotating in the F direction,
Since the terminal +1 becomes the torque level, 01 (the output of the NOR gate 31 becomes the torque level via the gate 3o. Therefore, A
One ND gate 33 is in an open state and one AND gate 34 is in a closed state, and the output of the AND gate 34 becomes a torque level.
Since the CL terminal of the memory circuit 108 is at level 11, its output Q remains unchanged. Also, since the contact point 11 is in contact with the insulating part 17, the output of the AND game 33 is [
'' level, and this output is input to the AND gate 38 which is in an open state via the OR gate 36, thereby causing the wiper motor 101 to continue rotating. Then, when the contact point 11 contacts the electrode plate 16 at the position of the inward protrusion 16b, it receives zero potential and a stop signal S4 is generated, so the output of the AND gate 33 becomes a torque signal, and the time limit circuit 4
After the time set in 1 has elapsed, the relay contact 5b connects to the ground side. In this way, the wiper blade 24 moves to the retracted position @A and stops (FIG. 5).

When the wiper operation switch 103 is selected to the HI position, the terminal +2 becomes the torque level, the relay coil 43a is energized, and the output of the NOR gate 31 becomes the torque level.
The output of OR gate 36 becomes 1-Level. Therefore, when the relay coil 43a is energized, the relay contact 43b is switched to the high-speed rotation side, and in this high-speed state, the rotation of the wiper motor 101, the action of the wiper blade position detector 104, and the operation of the circuit move the relay contact 43b to the above-mentioned LOW position. Similarly to the above case, the wiper blade 24 reciprocates to perform a wiping operation.

When the wiper operation switch 103 is selected to the INT position, the terminal C1 is grounded, and the signal state of the torque signal is input to the OR gate 30 through the resistor. As a result, the OR gate 30 outputs a torque, the NOR gate 31 outputs a torque, and the state of this torque is AN
It is input to D gates 33 and 34. Therefore, the AND gate 34 is in an open state. On the other hand, the signal state of the torque bell is also input to the control circuit 7, and as a result, the control circuit 7 intermittently generates a pulse signal. This pulse signal is 01
1 gate 36, and the 14 level output of the OR gate 36 is ANDed since the output Q of the memory circuit 108 is L.
Through the gate 38, the transistor "rl is turned on, the relay coil 5a and the relay contact 5b are operated, and the wiper motor 101 is rotated forward.

When the wiper sweater 101 rotates forward, the wiper blade position detection iW 104 rotates in synchronization with this, and a 1-level signal is continuously applied from the contact point 10 to the transistor "rl" via the AND gear 34 and the OR gear 1 to 36. .

Therefore, even if the output of the control circuit 7 is lost, the wiper motor 101 continues to rotate until the wiper blade 24 reaches the lower limit stop position. Contact point 10 is again on the other edge B. O when grounded at
The output of R gate 36 becomes L level and wiper motor 0
1 stops rotating. At the same time, the state of the CP terminal of the memory circuit 108 changes from 1'' to L, and the state of the output 0 is inverted to become level 14. This state is held until the next time the control circuit 7 outputs the [4 level]. When the pulse signal is output from the control circuit 7 again, the three A N D gates are in the listening state due to the output Q, so the transistor Tr2 is turned on, and the wiper motor 01 is reversely rotated as described above. The subsequent operation is the same as above, and IN
The above operation is repeated until the T position is deselected.

FIG. 7 is a time chart showing the operational relationship between the reversal signal @S3, the stop signal S4, the armature 101a, and the wiper blade 24. In this time chart, the stop signal S4 is shown with the L level and 1-level reversed, and the inverted signal S3 shows the falling state as a pulse. As is clear from this time chart, armature 101
When a rotates forward and backward, an open/stop time tl occurs, and the wiper blade 24 also stops at the lower limit B of the wiping range for a period t.

It is possible to make the following changes to J3 in the tenth embodiment. In time limit circuit 41.42, 8N Rigoo 1-38
．． Although the delay effect was caused when the output of the circuit 39 changes from 1-1- to L, it can be configured to avoid the delay when changing from L to 1''. Furthermore, the relationship between tl and time bt' is not strictly defined;
It can also be set arbitrarily depending on the purpose. In order to operate the wiper blade 24, a cable or a gear may be used instead of the link mechanism, or the arm of the wiper blade 24 may be directly coupled to the output shaft of the wiper motor 01.

[Effects of the Invention] As is clear from the above description, according to the present invention, the wiper motor J3 rotates forward and reverse repeatedly within a predetermined angle range, thereby causing the wiper blade to swing and perform the wiping operation. In a wiper device that performs this function, by forming a short circuit for the required time when reversing the rotation of the wiper motor, sufficient time is secured for dynamic braking, and the starting current is reduced after reducing the lightning current generated by the wiper motor. This prevents excessive current from flowing into the relay contacts for motor reversal, extending the life of the relay contacts.In addition, it provides a wiper control circuit using a new and simple electronic circuit, making it more precise. The effect is that control can be realized.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of the present invention. FIG. 2 is a specific circuit diagram of a control circuit for a wiper device according to the present invention. FIG. 3 is a configuration diagram showing the relationship between the wiper motor and the cam play 1. FIG. 4 is an explanatory diagram showing the attachment relationship between the link mechanism for swinging the wiper blade and the electrode plate. Figure 5 shows the rotational state of electrode plate 1~ and the state of each part of the circuit.
This is a time chart showing the relationship with the position of the soybean blade. FIG. 6 is an explanatory diagram showing the relationship between the generated current and the starting current when the wiper is reversed. FIG. 7 is a time chart showing the relationship between the stop signal, the reversal signal, the rotating state of the armature, etc. [Description of symbols] 1... Vehicle battery 2... Ignition switch 5a... Forward rotation relay coil 5b... Forward rotation relay contact 6a... Reverse rotation relay coil 6b... Reverse rotation relay contact 7 ... Control circuit 22 ... Crank arm 24 ... Wiper blade 33 ... AND gate 34 for stop signal ... AND gate 41, 42 for reverse signal ... Time limit circuit 101 ... Wiper motor 102 ... ... Switch device 103 ... Wiper operation switch 104 ... Wiper blade position detector 105 ... Selection circuit 106 ... Selection command circuit 107 ... Drive signal output circuit 108 ... Memory circuit 109 ...・Forward/reverse selection circuit

Claims (1)

[Scope of Claims] A switch device is provided for switching the direction of application of voltage applied to the wiper motor, and the operation of the switch device is controlled to switch the direction of voltage application, and the wiper blade is rotated forward or reverse by rotating the wiper motor in the forward or reverse direction. The wiper device includes: a wiper operation switch for selecting an operating state of the wiper motor; a wiper blade position detector that operates in correspondence with the wiper blade and detects the operating position of the wiper blade; , a selection circuit that selects one of the various signals generated by the wiper blade position detector; and a selection command circuit that inputs the output signal of the wiper operation switch to determine the selection operation of the selection circuit. a drive signal output circuit that inputs the output signal of the selection circuit and outputs a drive signal for operating the wiper motor; and a drive signal output circuit that inputs the output signal of the selection circuit and outputs a signal that instructs forward rotation or reverse rotation. a memory circuit for outputting; a forward/reverse select circuit for selecting forward or reverse rotation of the wiper motor based on an output signal of the memory circuit; A control device for a wiper device, comprising: a timer circuit for delaying time.