JPH0471723B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a vehicle top opening/closing device for opening and closing a vehicle top.

"Prior Art" As conventional vehicle hood opening/closing devices, manual devices and hydraulic devices are known. but,
Manual devices are cumbersome to operate and are particularly unsuitable for women. In addition, a hydraulic device requires a hydraulic pump, an operating cylinder, etc., and the top opening/closing system becomes large.

"Problems to be Solved by the Invention" The present invention has been made to solve the above problems, and is easy to operate, small in size, and prevents parts of the human body or objects from accidentally touching the switch. To provide a motor-operated vehicle hood opening/closing device that never operates.

"Means for Solving the Problem" According to the present invention, two motors each rotate drive shafts provided on both sides of a vehicle for opening and closing the hood via a reduction mechanism; A switching relay that respectively switches the rotational direction of the two motors, a switching relay driving transistor that switches and drives both of the switching relays, and a top opening command switch and a top closing command switch that respectively command opening or closing of the top. and operation time determining means for determining whether either the top opening command switch or the top closing command switch has been operated;
opening/closing command determining means for determining whether the top opening command switch or the top closing command switch has been operated; an operating means for opening and closing; a rotation synchronization sensor provided in at least one of the motors and emitting a pulse synchronized with the rotation of the motor; and a rotation synchronization sensor that emits a pulse synchronized with the rotation of the motor; There is provided a vehicle hood opening/closing device characterized by comprising: rotation synchronization correction means for reducing the rotational speed of the motor and synchronizing the rotational speeds of both the motors.

"Operation" According to the above configuration, when the top opening command switch or the top closing command switch is operated for a predetermined period of time,
Since the top is opened or closed, even if these command switches are instantaneously operated due to accidental contact with a part of the human body or other object, no malfunction will occur.

Embodiment Next, an embodiment of the vehicle hood opening/closing device of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the vehicle hood opening/closing device of this embodiment includes an operating circuit 200 whose main element is a control microcomputer 1, and a first motor drive circuit whose main element is a first motor 2. A circuit 300, a second motor drive circuit 400 whose main element is a second motor 3, and a top opening command switch 4 and a top closing command switch 5 for commanding opening or closing of the top 120. It consists of a top opening/closing command switch circuit 500. The switches 4 and 5 are push button switches and are closed only when operated.

In the operating circuit 200, 6, 7, 8, and 9 are control microcomputers 1 (hereinafter simply MPU1).
), and when a positive surge is applied to the input terminals 10 and 11 of the operating circuit 200, the input ports SW4 and SW of the MPU1
6 is shot by diodes 6 and 7, and
When a negative direction surge is applied, the MPU 1 is protected by being shunted by the diodes 8 and 9. 14, 15, 16, and 17 are also input protection diodes, and terminal 1 of the input section of the operating circuit 200
The negative direction surge to 2, 13 is connected to diode 15, 1.
7, the forward surge from terminals 12 and 13 is shunted by diodes 14 and 16, and MPU1
protects input ports SW3 and SW5. resistance 1
8, 19, 20, 21, and 22 are pull-up resistors. Resistor 23, capacitor 24, and resistor 2
5 and capacitor 26 are rotation synchronous sensors 27, 28
This is an integrating circuit that eliminates noise caused by chattering. Resistors 29 and 30 are input ports of MPU1
This is the protective resistance for SW5 and SW3. The capacitor 31 connected to the reset port RST of MPU1 is
This is a capacitor for power-on reset, a charging resistor is provided inside the MPU 1, and a diode 32 is a diode for discharging the capacitor 31. 33 is a ceramic oscillator that generates a clock signal for operating the MPU1;
4 and 35 are capacitors for stabilizing the oscillation of the ceramic oscillator 33. A resistor 36 and a Zener diode 37 connected to the power input port VDD of the MPU 1 form a constant voltage circuit for creating a voltage (5V) for operating the MPU 1 from the vehicle power supply voltage, which is normally 12V, applied to the power supply terminal 43. It consists of 38 is a stabilizing capacitor, and 39 is a high frequency noise cutting capacitor made of a high frequency capacitor such as a ceramic capacitor. A ceramic buzzer 40 connected to the power terminal 43 is a buzzer for notifying the operator of the operating state of the top opening/closing device.The collector of a driving transistor 41 is connected in series to the buzzer 40, and the base of the transistor 41 is connected to the buzzer 40. It is connected to the buzzer output port BZ of the MPU 1 via the base current limiting resistor 42. The Zener diode 44 and resistor 45 connected to the input terminal 46 of the operating circuit 200 are connected to the top opening/closing command switch circuit 500.
The circuit constitutes a circuit for detecting that the top opening command switch 4 is closed, and when the top opening command switch 4 is closed, the voltage of the positive pole (+) of the power supply of the vehicle is applied to the terminal 46. Therefore, it is a constant voltage circuit to make the voltage the same as the operating power supply of MPU1. A capacitor 47 connected in parallel with the Zener diode 44 forms an integrating circuit for noise prevention, and is connected to the non-grounded end of the Zener diode 44.
A resistor 48 for input protection is connected between the input port O/C of the MPU 1, and is connected in parallel with the Zener diode 44 in order to constantly apply a low voltage (hereinafter simply referred to as L) to the port O/C. A pull-down resistor 49 is connected. A transistor 50 whose base is connected to the output port FET1 of the MPU1 via a base resistor 51, and a transistor 52 whose base is connected to the output port FET3 via a base resistor 53 are connected to the MPU1.
A level conversion transistor for converting the voltage on/off of output port FET1 and output port FET3 into on/off of the vehicle power supply voltage,
The collector outputs of the transistors 50 and 52 are
They are connected to output terminals 54 and 55 of the actuating circuit 200 via resistors 56 and 57, respectively. The collectors of the transistors 50 and 52 are collector resistors 5
The terminals 8 and 59 are connected to the power supply terminal 43, respectively. Although the hood opening/closing device of this embodiment operates even without the resistors 56, 57 and the Zener diodes 60, 61 built in the motor drive circuits 300, 400, the field effect transistors 62, 63, 64 and 65 are voltage-operated elements, and since almost no gate current flows, terminals 54 and 55 of the in-vehicle lead wire
Since contact failure is likely to occur at the resistor 5,
6, 57 and the Zener diodes 60, 61, when the transistors 50, 52 are off, several m
A current of approximately A is caused to flow through the terminals 54 and 55, thereby preventing poor contact between the connectors at the terminals 54 and 55.

Vehicle speed signal terminal 67 of operating circuit 200 and MPU1
The diode 66 connected between the vehicle speed signal input port SP of the MPU
Prevents the voltage of 12V from being applied to the input port SP of No.1. MPU1 output port R24, R1
Transistors 68 and 69 connected to MPU 1 through base resistors 70 and 71 are level conversion transistors for converting the on/off signals at the ports R24 and R13 of the MPU 1 into on/off signals of the vehicle power supply voltage of 12V. , the collectors of the transistors 68, 69 are collector resistors 72, 7
3 to the power supply terminal 43. Relay drive transistors 74, 75, 76, 77
are transistors that energize the switching relay coils 90, 91, 92, 93, respectively, their emitters are connected to the power supply terminal 43, and their collectors are connected to the output terminals 78, 79, 80, 81, respectively, The bases of the transistors 74 and 76 are connected to the collector of the level converting transistor 69 via base resistors 82 and 84, and the bases of the transistors 75 and 77 are connected to the collector of the level converting transistor 68 via base resistors 83 and 85. connected to the collector. Diodes 86, 87, 8 inserted between the collectors of relay drive transistors 74, 75, 76, 77 and ground
8 and 89 absorb reverse voltage generated from switching relay coils 90, 91, 92, and 93 of motor drive circuits 300 and 400. A diode 94 inserted between the power supply terminal 43 and the ground is a diode for similarly absorbing reverse voltage coming onto the power supply line.

The motors 2 and 3 of the motor drive circuits 300 and 400 are DC ferrite motors, and the armature is equipped with a rotation synchronization sensor 2 such as a reed switch that turns on and off once per rotation of the armature.
7 and 28, respectively. Also, motor 2
The motor 3 has a speed reduction mechanism consisting of a multi-stage gear train, and has position detection switches 98 and 99 on drive shafts 96 and 97 of the hood 120, which are the final output shafts thereof. High frequency coils 100, 101, 102, 103 connected in series with the motors 2, 3 and capacitors 104, 105, 106, 107 inserted between the power supply side of these coils and the ground are connected to the brushes of the motors 2, 3. This prevents the emitted spark noise from entering radios, etc. The field effect transistors 62, 63, 64, 65 are connected to the motors 2, 3.
The sources and drains of field effect transistors 62, 63, 64, 65 are switching relay contacts 108, 108, 110, 111.
The gate is inserted between the normally closed terminal NC and ground, and the gates are connected to terminals 54 and 55, respectively.
The common terminals COM of the switching relay contacts 108, 109 and the switching relay contacts 110, 111 are connected to the motors 2, 3 via high frequency coils 100, 101, 102, 103, and these switching relay contacts 108, 109, 110, 111 normally open terminal
NO is connected to power terminal 112. The switching relay contacts 108, 109, 110, 111 and the switching relay coils 90, 91, 92, 93 constitute a switching relay for switching the rotation direction of the motors 2, 3, respectively.

In the motor drive circuit 400, diodes 113 and 11 connect the upper and lower sides of the motor 3 and the power supply terminal 43.
4 prevents the armature of the motor 3 from being short-circuited and supplies power to the actuating circuit 200 from the brushes of the motor 3. A diode 115 connecting the top opening command switch 4 and the switching relay coil 92 and a diode 116 connecting the top closing command switch 5 and the switching relay coil 93 are connected to the command switch 4,
When 5 is closed, field effect transistor 6
4 and 65 are turned off, the voltage generated by the motor 3 is applied to the power supply terminal 43, and the voltage is applied to the transistor 7.
5, 77 or the emitters and collectors of the transistors 74, 76 to prevent the current flowing into the vehicle power supply, thereby preventing the transistors 75, 77, 76, 74 from being destroyed. Field effect transistor 62,6
These field effect transistors 62, 63 and 6
Varistors 117 and 118 are connected in parallel with the sources and drains of 4 and 65, respectively.

As shown in FIG. 2, a hood 120 is provided at the top of the vehicle 119 following a front window glass 121, and the hood 120 is centered around drive shafts 96 and 97 provided on both left and right sides of the vehicle 119. It can be opened and closed. The two motors 2 and 3 rotate the drive shafts 96 and 97, respectively, via the reduction mechanism as described above. The aforementioned position detection switches 98, 99
is turned on while the top 120 is being opened or closed, and turned off 10 degrees before the opening or closing end.

"Operation" The operation will be explained with reference to FIG. 3 showing the program of the MPU 1, and the aforementioned FIGS. 1 and 2.

FIG. 1 shows the situation when the circuit is not activated. At this time, the top opening command switch 4 and the top closing switch 5 are open, and the power terminal 11
From 2 onwards, switching relay contacts 108, 109, 11
Voltage is only applied to the normally open contact NO of 0 and 111, and the motors 2 and 3 and the operating circuit 20
Since the positive voltage of the vehicle's power supply is not supplied to the power supply terminal 43 of 0, the motors 2 and 3 will not malfunction due to noise or the like. Now, the operation when the top 120 of the vehicle 119 is fully closed and the top opening command switch 4 is pressed to open the top 120 will be described. When the top opening command switch 4 is closed,
This switch 4, diode 11 from the power supply positive pole
5 and relay coil 92 to ground, switching relay contact 110 is turned on and its common terminal COM contacts normally open contact NO. When the switching relay contact 110 is turned on, the normally open contact of the switching relay contact 110 is connected from the power supply positive terminal to the power terminal 112.
NO, power is supplied from the common terminal COM, the high frequency coil 102 and the diode 113 to the power supply terminal 43, and the operating circuit 200 is operated. MPU1
When power is supplied to the power supply terminal 43, the capacitor 31 is charged from the ground side, and the capacitor 31 is charged from the VDD port.
It is reset by delaying the voltage application to the RST port. At this time of reset, the output ports R13, R24, FET3, FET1 and BZ of MPU1 all become low potential (hereinafter, low voltage is simply referred to as "L" and high voltage is referred to as "H"), and transistors 41, 50, 52 and transistor 68,6
9 are all turned off, and transistors 68 and 6 are also turned off.
9 is turned off, transistors 74, 75, 76,
77 is turned off. At this time, the MPU 1 first initializes each flag and counter in step 600, and then checks whether the vehicle speed signal has risen from "L" to "H" through a loop of steps 601 and 602. After the top opening command switch 4 (or top closing command switch 5) is pressed for 0.5 seconds or more, the process advances to step 604. This loop occurs when the hood opening/closing device malfunctions when the switch 4 or 5 is touched by mistake, and when the hood 120 opens (or closes) while the vehicle is running, the hood 120 receives wind while the vehicle 119 is running. Prevent instability. Next, in step 604, it is determined whether the top opening command switch 4 or the top closing switch 5 has been pressed. When the top opening command switch 4 is closed as in the example, voltage is applied from the switch 4 to the input port O/C of the MPU 1 via the diode 115 and the terminal 46, and the port O/C becomes "H". become. Further, when the top closing command switch 5 is closed and the top opening command switch 4 is open, the port O/C is set to "L" by the pull-down resistor 49. When the input port O/C is "H", an open flag is set in step 605. In the next step 606, it is determined whether the vehicle speed flag is set, and if the result is positive, the process returns to step 600 and the following operations are not performed. That is, the top 120 is not opened or closed while the vehicle 119 is running. step
If the determination result in 606 is negative, it is determined in step 607 whether or not the open flag is set, and in the present example, a positive result is obtained, so in step 608, the output port R13 of MPU1 is is set to "H", the level conversion transistor 69 is turned on, the switching relay driving transistors 74, 76 are turned on, and the output terminals 78, 76 are turned on.
The current from 80 causes the switching relay coil 90,
92 is turned on, switching relay contacts 108, 11
The common terminal COM of 0 is connected to the normally open terminal NO. And the normally open terminal of the switching relay contact 110
From NO to common terminal COM, high frequency coil 102
Since voltage is supplied from the positive terminal of the vehicle's power supply to the power supply terminal 43 via the diode 113 and the relay drive transistors 74 and 7 of the operating circuit 200.
6 is maintained in the on state, and the switching relay coil 9
0.92 is actually held firmly. Therefore, even if the operator releases the top opening command switch 4 after 0.5 seconds, voltage continues to be supplied to the power supply terminal 43 of the operating circuit 200.

In addition, contrary to the case of the example, when the top closing command switch 5 is closed, the switching relay coil 91 and the switching relay coil 93 operate in the same way to achieve self-holding, and the switching relay contacts 109 and 111 By connecting the common terminal COM to the normally open terminal NO, the current flowing through the motors 2 and 3 is reversed, so the rotation direction of these motors 2 and 3 is the same as when the top opening command switch 4 is closed. It will be the opposite.

In step 610, the output port of MPU1
By setting FET1 and FET3 to "L" and turning off level conversion transistors 50 and 52, output terminals 54 and 5 of operating circuit 200
5 to the gates of field effect transistors 62, 63 and field effect transistors 64, 65, respectively, thereby turning on these field effect transistors 62-65. Therefore, the lower side of the motors 2 and 3 is the high frequency coil 101,
103, the common terminal COM of the switching relay contacts 109, 111, the normally closed terminal NC, and the sources and drains of the field effect transistors 62, 63 and 64, 65, so that the motor 2
Then, the motor 3 starts rotating in the forward direction, and the drive shafts 96 and 97 are rotated via the reduction mechanism, and the hood 12
0 begins to be released.

Step 611 is a process of intermittently turning on and off the buzzer 40 at 0.5 second intervals to notify that the top is being opened (or closed). MPU1 output port BZ is “H”
, the drive transistor 41 turns on, the ceramic buzzer 40 sounds, and the output port
When BZ is set to “L”, the driving transistor 41
is turned off, and the buzzer 40 stops sounding.

Next, in step 612, it is determined whether or not the potential of the terminal 10 from the rotation synchronization sensor 27 rises from "L" to "H" because the rotation speed of the motor 2 becomes faster than the rotation speed of the motor 3. Input port SW4,
Judging from the signal to SW6, if it is rising
Increase the internal counter of MPU1 by 1, and when the difference between the internal counter that counts pulses from input port SW4 and the internal counter that counts pulses from input port SW6 becomes 2 or more, and the value of the internal counter is larger, Output port FET1 of MPU1 is set to "H". As a result, the level conversion transistor 50 is turned on, and the output terminal 5
Since the potential of the motor 4 becomes "L", the field effect transistors 62 and 63 are turned off, and the current to the motor 2 is cut off, so that the rotation speed of the motor 2 is reduced by the load on the motor 2. Since the output port FET3 of MPU1 is “L”, the level conversion transistor 5
Since the output terminal 55 is "H", the field effect transistors 64 and 65 are kept on, and the rotation speed of the motor 2 is synchronized with the rotation speed of the motor 3. In step 616, it is similarly determined whether the synchronous pulse of motor 3 is rising, and if the result is positive, steps 617,
Similar processing is performed in steps 618 and 619 to perform synchronization correction. step 619
In the process of , contrary to the above, the output port of MPU1
FET3 is set to “H” and output port FET1 is set to “L”
Therefore, the rotation speed of the motor 3 is synchronized with the rotation speed of the motor 2. In this way, since the motors 2 and 3 are always operated in synchronization, the top 120 is not tilted and is opened parallel to both left and right sides of the vehicle 119. Step 614 and Step
When it is determined at 618 that the difference between the internal counters is less than 2, motors 2 and 3 are rotated again. In this embodiment, synchronization correction is performed when the difference between the counters is 2 or more so that both motors 2 and 3 are not turned on and off all the time.

In step 620, first, the position detection switch 9 is
By turning on either terminal 8 or 99, it is determined whether the potential of terminal 12 or terminal 13 has changed from "H" to "L". If the judgment result in step 620 is positive, this means that either the left or right side of the hood 120 has reached 10 degrees in front of the open end, so step 621 is performed.
Of the motors 2 and 3, the position detection switch 9
Turn off the field effect transistors 62, 63 or field effect transistors 64, 65 of the motors 2, 3 on which the switches 8, 99 have turned on, and turn the position detection switches 99, 98 of the other motors 3, 2 from off to on. until the field effect transistor 6
2, 63 or 64, 65 are kept off, and the positions of the drive shafts 96, 97 from the motors 2, 3 are corrected.

In step 622, it is determined whether or not there is a rising edge of the vehicle speed signal, and if the determination result is positive, the vehicle 119 has started running (by opening the top 120 to the desired position, etc.). Therefore, in step 623, the field effect transistor 6 is
2 to 65 are turned off, and the switching relay coils 90 and 92 are turned off in step 624, thereby releasing the self-holding state and stopping the opening operation of the top 120. step
626 is a process for determining whether or not the motors 2 and 3 are locked based on the pulse interval of the rotation synchronization sensors 27 and 28. Similarly, when the motors 2 and 3 are stopped due to the motors being fully opened, the judgment result at step 626 becomes positive, and the field effect transistors 62 to 6 are turned off at step 627.
5 is turned off, and the buzzer 40 goes to 1 at step 628.
After being turned on for a second to notify the end of the operation, the switching relay coils 90 and 92 are turned off in step 629, the self-holding is released, and the opening operation of the top 120 is stopped. If the determination result in step 626 is negative, the process waits for 5 msec in step 631, and then returns to step 611.

The above operation description has been made regarding the case where the top 120 is opened from fully closed, but when the top 120 is closed from fully opened, the same operation is performed by pressing the top closing command switch 5.

"Other Embodiments" In the above embodiments, by providing rotation synchronization sensors 27 and 28 on both motors 2 and 3, the speed of the slower one of the motors 2 and 3 is adjusted to the speed of the faster motor. However, if you adjust the windings to create a 20 to 30% difference between the rotational speeds of both motors, the field effect transistor of the motor with a slower rotational speed and this The accompanying output circuit can be omitted.

"Effects" As stated above, the vehicle opening/closing device of the present invention is easy to operate because it is driven by a motor, and since the motor is separated into left and right sides, the drive mechanism is simplified and installation is easy. In addition, since the drive mechanism is short, the hood will not be twisted due to installation errors. Further, since the rotation of the motor is controlled electronically, it is possible to provide a small vehicle opening/closing device that has a simple drive mechanism and does not take up much space for installation. Moreover, since the two motors operate in synchronization, the hood will not be tilted, and since the power is turned off when the opening/closing device is not in use, there will be no malfunction due to noise, etc.
There are many excellent effects such as those mentioned above.

Furthermore, since the vehicle opening/closing device of the present invention includes operation time determining means for determining whether either the top opening command switch or the top closing command switch has been operated for a predetermined period of time, This has an excellent effect in that even if the command switch is instantaneously operated by touching the command switch with another object, no malfunction will occur.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of a vehicle opening/closing device of the present invention, FIG. 2 is a front view of a vehicle equipped with a hood, and FIG. 3 is a flowchart showing a program of a microcomputer. 1... Control microcomputer, 2, 3... Motor, 4... Top opening command switch, 5... Top closing command switch, 27, 28... Rotation synchronization sensor, 62,
63, 64, 65...field effect transistor, 7
4,75,76,77...Switching relay driving transistor, 90,91,92,93...Switching relay coil, 98,99...Position detection switch, 108,
109, 110, 111...Switching relay contacts.

Claims (1)

[Scope of Claims] 1. In a vehicle hood opening/closing device that opens and closes a hood that can be opened/closed around drive shafts provided on both left and right sides of a vehicle, the two drive shafts each rotate via a speed reduction mechanism. a motor, a switching relay that switches the rotational direction of both motors, a switching relay drive transistor that switches and drives both switching relays, and a top opening command switch and a top opening command switch that respectively commands opening or closing of the top. a closing command switch; operation time determining means for determining whether either the top opening command switch or the top closing command switch has been operated for a predetermined time; and either of the top opening command switch or the top closing command switch. an opening/closing command determination means for determining whether the top opening command switch or the top closing command switch is operated for a predetermined period of time; and at least one of the two motors. a rotation synchronization sensor that is provided on one motor and emits a pulse synchronized with the rotation of the motor; and when a pulse from the rotation synchronization sensor is detected, the rotation speed of one of the two motors is reduced, and the rotation speed of one of the two motors is reduced; A vehicle hood opening/closing device comprising: rotation synchronization correction means for synchronizing the rotational speeds of the hoods of the vehicle.