JPS60154940A - Car wiper drive device - Google Patents

Abstract

PURPOSE:To simplify the structure by providing two series of relay switches with correspondence to the front and rear wipers thereby sharing single timer relay switch circuit with front and rear wipers. CONSTITUTION:The terminal 5d of changeover switch 5 for front wiper is connected to the input terminal 7a of timer relay switch circuit 7 while the terminal 6d of changeover switch 6 for rear wiper is connected to the input terminal 7a of switch circuit 7. The switch circuit 7 is provided with timer circuit 7b, relay coil 7c and relay switches 8, 9 for switching the contacts where the switches 8, 9 are arranged in two series to perform switching function simultaneously. Because of two series structure, pause time at automatic stop position and starting timing of drive motors 1, 2 are equalized to drive the motors 1, 2 synchronously and intermittently.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiper drive device installed on a vehicle,
In particular, it relates to control of intermittent operation.

Conventionally, the wiper drive device installed on a vehicle is
For example, as described in Japanese Utility Model Application Publication No. 53-87547,
Selectively switch between three operation modes: fixed-position automatic stop operation, in which the wiper stops at a predetermined position, such as continuous operation at high or low speeds, and intermittent operation, in which the wiper is intermittently driven by the operation of a timer relay switch circuit. What you get is known.

By the way, the timer relay switch circuit in such a wiper drive device has only one slide switch corresponding to the drive motor of the wiper that is the object of operation control. Vehicles equipped with a front wiper (hereinafter referred to as a front wiper and a rear wiper) require two timer relay switch circuits for each. In this case, the two timer relay switch circuits have no relation to each other, so if the front and rear wipers are both operated intermittently, they will operate intermittently and cannot be synchronized, causing the driver to There was an inconvenience that it gave a bothersome feeling.

The present invention has been made to solve the above-mentioned conventional inconveniences, and when applied to a vehicle equipped with a front wiper and a wiper, it is possible to independently control the operation of both the wipers, and also to operate both the wipers at the same time. A wiper drive device for a vehicle that synchronizes both during intermittent operation, and that can perform the above functions at a low cost using a single timer relay switch circuit that is slightly modified from a conventional timer relay switch circuit. The purpose is to provide

For this purpose, the present invention provides at least three types of operation of the wiper drive motor: continuous operation, fixed position automatic stop operation, and intermittent operation.
It has a selector switch that can select between two operating modes, and operates in the intermittent operating position of this selector switch.
In a vehicle wiper drive device comprising a timer relay switch circuit that operates a wiper drive motor intermittently by activating a relay switch with a predetermined time constant, the timer relay switch circuit includes a timer relay switch circuit that drives a front wiper. In addition to providing two sets of relay switches that correspond to the motor and the wiper drive motor and that operate simultaneously, this timer relay switch circuit is connected to each of the changeover switches corresponding to the wiper drive motors. The gist is that the circuit is configured to be able to operate individually in intermittent operation positions.

The present invention will be specifically described below based on an embodiment shown in the drawings.

In the figure, the symbol @1 is a drive motor for the front wiper (not shown), and 2 is the drive motor for the rear wiper (not shown). The circuit is configured to drive rotation.

The changeover switch 5 for the front wiper is set to "high speed" and "
In order to selectively switch between the four operation modes of "low speed", "intermittent", and [stop J], the Lfr corresponding to each operation mode is set.
It has four switching buttons: HIJ, rLOJ, rINTJ, and rOFFJ, and is connected via the key switch 4 to terminals 5a and 5b, which are connected to the high-speed operation armature core and the low-speed operation armature (not shown) of the drive motor 1, respectively. a power terminal 5C connected to the positive side of the battery 3;
A terminal 5 dl connected to an input terminal 7a of a timer relay switch circuit 7, which will be described later, and a terminal 5e connected to a common terminal 8a of one of the relay switches 8 and 9 of the two relay switches 8 and 9 of this timer relay switch circuit 7. When the rHrJ button is selected, terminals 5C and 58 are connected, when the rL, OJ button is selected, terminals 5C and 5b are connected, and when the FFJ button is selected, terminals 5e and 5b are connected. and are connected together,
By selecting the rlNTJ button, terminals 5C and 5d are connected, and at the same time, terminals 5b and 58 are connected.

The changeover switch 6 for the rear wiper has the same configuration as the changeover switch 5, except that it corresponds to the rHIJ button and terminal 5a in the changeover switch 5, and is connected by selecting the rL OJ button. Among the terminals 6a and 6b, 6a is connected to a low-speed operation armature (not shown) of the drive motor 2, and the terminal 6b is connected to the positive side of the battery 3 via the key switch 4. Maζ
Terminal 6C connected to terminal 6a by selecting rOFFJ button
is connected to the common terminal 9a of the other relay switch 9 of the two relay switches, and further
When the I NTJ button is selected, the terminals 6a and 60 are connected, and at the same time, the terminals 6b and 6d are connected, and this terminal 6d is connected to the input terminal 7 of the timer relay switch circuit 1.
connected to a.

Here, the timer relay switch circuit 7 includes a conventional capacitor-type timer circuit 7b, a relay coil 7C that is energized for a predetermined period of time according to its time constant, and a relay switch that switches contacts by energizing the relay coil 7C. 8.9, this relay switch 8,
9 are configured in two series so that they can be switched at the same time. Further, the timer circuit 7b is provided with another input terminal 7d in addition to the input terminal 7a, and when the power supply voltage is input to the input terminal 1a, the relay coil 7c is energized, and in this state, the power supply voltage is applied to the input terminal 7d. When input, the coil 7C becomes de-energized, and then when the input terminal 7d is grounded, the predetermined setting intercostal relay coil 7C is kept de-energized by the discharge of the internal converter.

And the normally open contact point 8b on one side glue switch 8
is connected to the positive side of the battery 3 through the key switch 4 together with the power supply terminal 5C of the selector switch 5, and is connected to the normally open contact 9b which is connected to the other relay switch 9 in the same way as Iζ.
is connected to the positive side of the battery 3 via the key switch 4 together with the power terminal 6b of the changeover switch 6. Further, the normally closed contact 8C of the relay switch 8 is connected to the input terminal 7.
d side, and is also connected to a common terminal 11a of a cam switch 11 which opens a contact point every rotation of the cam 10 connected to the drive motor 1 with each rotation. A normally closed contact 11b of this cam switch 11 is connected to the ground side of the drive motor 1, and a normally closed contact 11c is connected to the positive side of the battery 3 via the key switch 4. On the other hand, the drive motor 2 for the rear wiper is also provided with a cam 12 connected thereto, and the common terminal 12a of the cam switch 13, which opens the contact every time the cam 12 rotates, is connected to the normally open terminal 12a of the other wiper race switch P9. The normally open contact 13b of the cam switch 13 is connected to the ground side of the drive motor 2, and the normally closed contact 13c is connected to the key switch 4. The cam switches 11 and 13 are connected to the positive side of the battery 3 via the above-mentioned cam switches 11 and 13, respectively, and are associated with each other so as to open the normally closed contact 11C213c when the corresponding wiper reaches a predetermined stop position. It constitutes a position automatic stop device.

In the above configuration, when the key switch 4 is closed and the rear wiper changeover switch 6 is in the stop position when the key switch 4 is closed and the rear wiper changeover switch 6 is in the stop position by operating the rOFFJ button, when the front wiper changeover switch 5 is set to the high-speed operation position by operating the rHIJ button, the in-vehicle battery 3 through the key switch 4 is applied to a high-speed operation armature (not shown) of the drive motor 1, the drive motor 1 rotates at high speed, and the windshield wiper (not shown) is operated continuously at high speed. . Similarly, by operating the rL-OJ button to select a low speed operation position, the front wiper is operated continuously at a low speed.

Conversely, when the selector switch 5 is in the stop position by operating the rOFFJ button, the switch 6 for the X7 wiper is set to the low-speed operation position by operating the L01 button, and the drive motor 2 The rear wiper is continuously operated at low speed by rotating at a low speed by the battery 3 via the rear wiper.

Next, the A7 wiper selector switch 6 is set to “0FFJ”.
Alternatively, when the position other than the intermittent operation position is set by operating the r L 0.1 button, operating the rlNTJ button of the front wiper changeover switch 5 connects terminals 5c and 5d, so the key switch 4
input terminal 7a of timer relay switch circuit 7 via
is connected to the positive side of battery 3. Also, since the terminals 5b and 5e are connected at the same time, the drive motor 14iL and its low-speed operation Amaji core (not shown)
Normally closed contact 8C of relay switch 8 and cam switch 1
1, an automatic stop circuit connected to the positive side of the battery 3 through the normally closed contact 11c of the relay switch 8, and a start circuit connected to the battery 3 side through the normally closed contact 8b of the relay switch 8.
The circuit is configured so that it can be switched to the grid. Therefore, when the front wiper is in the normal stop position and the normally closed contact 11c of the cam switch 11 is open due to the action of the cam 10, the power supply voltage is not input to the input terminal 7d, and the power supply voltage is applied only to the input terminal 7a. is input, the relay coil 7C of the timer relay switch circuit 7 is excited, which causes the relay switch 8 to switch and connect its normally closed contact 81) to the common terminal 8a, and the drive motor 1 It is started by being directly connected to the battery 3 side without going through the cam switch 11. After the drive motor 1 is started, the cam switch 11 returns and its common terminal 11a is connected to the normally closed contact 11c, so that the power supply voltage of the battery 3 is brought to the input terminal 7d of the timer relay switch circuit 7. , and the relay coil 7G becomes de-energized. Accordingly, the relay switch 8 returns to its original state and the starting circuit is cut off, but the common terminal 8a and the normally closed contact 8C are connected to form an automatic stop circuit, so that the normally closed contact 11G of the cam switch 11 is closed.

Power is supplied through the path of the normally closed contact 8G of the relay switch 8, and the drive motor 1 continues to rotate. Then, due to the action of the cam 10 linked to this rotation, the normally closed contact 11c of the cam switch 11 opens when the front wiper is at the steady stop -1 position, the drive motor 1 is temporarily stopped, and the timer relay switch circuit 7 The input terminal 7d of the cam switch 11 is grounded via the normally closed contact 111 of the cam switch 11. As a result, the internal capacitor of the timer circuit 7b starts discharging, and the relay coil 7G is kept de-energized for the set discharge time. When the discharge is completed, the drive motor 1 is stopped for a predetermined time until the relay coil IC is energized and the relay switch 8 is switched, and then restarted.The drive motor 1 is operated intermittently by repeating such a cycle. .

On the other hand, only the rear wiper selector switch 6 is set to rl.
When the intermittent operation position is set to +on by operating the NTJ button, the timer relay switch circuit 7 is activated and the drive motor 2 is connected to the normally closed contact 13 of the cam switch 13.
The circuit is configured so that it can be switched between two systems: an automatic stop circuit via the normally closed contact 9C of the relay coil 'f9 and the start circuit via the normally closed contact 9b of the relay switch 9. In response to the switching operation of the relay switch 9, the drive motor 2 is operated intermittently through a cycle of startup, automatic stop, pause, and restart.

Here, when both the front wiper and rear wiper changeover switches 5.6 are in the intermittent operation position by selection of the rINTJ button, the relay switches 8.9, which have circuit configurations for the drive motors 1 and 2, are shared. Since the timer circuit 7b and the relay coil 7C have a two-way structure, the timer circuit 7b and the relay coil 7C switch at the same time. , 2 are synchronously operated intermittently.

As explained above, according to the present invention, the timer relay switch circuit for intermittent operation is operated individually at the intermittent operation position of the changeover switch corresponding to the front wiper, rear wiper, and the front wiper. ll possible circuit structure I
Two relay switches are provided for the front wiper and the rear wiper, so one timer relay switch circuit can be used in common for the front wiper and rear wiper, resulting in a simple configuration. The system is inexpensive and can control the front and rear wipers independently. In particular, since the two relay switches corresponding to the front wiper and the front wiper are configured in two sets so as not to operate simultaneously, when the front wiper and the front wiper are operated intermittently at the same time, they can be synchronized.

[Brief explanation of drawings]

The figure is a circuit configuration diagram of an embodiment of the present invention. 1.2... Drive motor, 3... Battery, 4...
Key switch, 5, 6-changeover switch, 5a,! ib
, 5c, 5d. 5 e-' terminal, 6a, 6b, 6c, 6d-...end 7.
7... Timer relay switch circuit, 7a, 7d...
・Input horn terminal, 7b...Timer circuit, 7c...Relay coil, 8, 9...Relay switch, 8a, 9a
...Common terminal, 8b, 9b...Normally closed contact, 8c,
9c...Normally closed contact, 10.12...Cam, 11.1
3...Cam switch, 11a, 13a =--Common terminal, 11t), 13b--Normally closed contact, 11c, 13
c... Normally closed contact, Hl, LO, INT. OFF...switch button. Patent Applicant: Fuji Heavy Industries Co., Ltd. Agent Patent Attorney: Jundo Otsukasa Patent Attorney: Susumu Murai Procedural Amendment (Method) 1. Indication of the case 1982 Patent Application No. 010494 2 Name of the invention Vehicle wiper drive device 3 Person making the amendment Relationship to the case Patent 1 Demei 1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo 4. Agent 5. Daily amendment order 6. Subject of amendment (1) Power of attorney (2) Full text of specification 7. Contents of amendment (1) The power of attorney is amended as shown in the attached sheet. (2) Amend the detailed payment statement as shown in the attached sheet.

Claims (1)

[Claims] The wiper drive motor is equipped with a changeover switch that can select at least three operation modes: continuous operation, fixed-position automatic stop operation, and intermittent operation. The vehicle wiper drive Me includes a timer relay switch circuit that operates a wiper drive motor intermittently by activating a relay switch, and the timer relay switch circuit includes a front window wiper drive motor and a rear window wiper drive motor. This timer relay switch circuit is equipped with 62 relay switches that correspond to the drive motors and operate at the same time.
A wiper drive device for a vehicle, characterized in that a circuit is configured such that each changeover switch corresponding to two wiper drive motors can be operated individually in an intermittent operation position.