JPH0471726B2 - - 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,
It is another object of the present invention to provide a vehicle top opening/closing device which can automatically stop supplying electricity to a motor when a human body is caught in the top or the top opening/closing device is locked due to some other malfunction.

"Means for Solving the Problem" According to the present invention, two motors each rotate drive shafts provided on both sides of the 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 opening/closing command determination means for determining which of the top opening command switch and the top closing command switch is operated, and a means for determining whether the top is opened or closed when either the top opening command switch or the top closing command switch is 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; rotational synchronization correction means for reducing the rotational speed of the two motors to synchronize the rotational speeds of the two motors; and motor lock detection means for detecting the locking of the two motors by detecting the width of a pulse emitted by the rotational synchronization sensor. A vehicle top opening/closing device is proposed, characterized in that the vehicle top opening/closing device is provided with an operation stopping means for stopping the operation of the operating means when a signal from the motor lock detection means is present.

"Operation" According to the above configuration, when a human body is caught in the top or the top opening/closing device is locked due to some other malfunction, the rotational speed of both motors decreases, so the width of the pulse emitted by the rotation synchronization sensor becomes wider. When the motor lock detecting means outputs a signal, the operation stopping means automatically cuts off the power to the motor and stops the opening/closing operation of the top.

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 top 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 connect the power supply voltage of the vehicle, which is normally 12V, to the power supply terminal 43 to the MPU 1.
It constitutes a constant voltage circuit to generate a voltage of 5V to operate the. 38 is a stabilizing capacitor,
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. Buzzer output port of MPU1 via base current limiting resistor 42
Connected to BZ. A Zener diode 44 and a resistor 45 connected to the input terminal 46 of the operating circuit 200 constitute a circuit for detecting that the top opening command switch 4 of the top opening/closing command switch circuit 500 is closed. When the hood opening command switch 4 is closed, the positive (+) voltage of the power supply of the vehicle is applied to the circuit, so it is a constant voltage circuit to maintain the same voltage as the operating power supply of the MPU 1.
A capacitor 47 connected in parallel with the Zener diode 44 forms an integrating circuit for noise prevention, and connects the non-grounded end of the Zener diode 44 and the MPU.
A resistor 48 for input protection is connected between the input port O/C of 1, and is connected in parallel with the Zener diode 44 in order to always 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 an output port
The transistor 52 whose base is connected to the FET3 via the base resistor 53 is a level conversion transistor for converting the on/off of the voltage of the output port FET1 and output port FET3 of the MPU1 to the on/off of the vehicle power supply voltage. , the collector outputs of the transistors 50, 52 are connected to the output terminal 5 of the actuating circuit 200 via resistors 56, 57.
4 and 55, respectively. The collectors of the transistors 50 and 52 are collector resistors 58 and 5.
9 to the power supply terminals 43, respectively. The resistors 56, 57 and the motor drive circuit 3
Zener diode 6 built in 00,400
Although the hood opening/closing device of this embodiment operates even without 0, 61, the field effect transistors 62, 63, 64, 65 of the motor drive circuits 300, 400 are voltage-operated elements, and almost no gate current flows. Since poor contact is likely to occur at the terminals 54 and 55 of the in-vehicle lead wire, the resistors 56 and 5 are
7 and Zener diodes 60, 61,
When the transistors 50 and 52 are off, a current of approximately several mA flows through the terminals 54 and 55.
Poor contact of the connector at 55 is prevented.

A vehicle speed signal is introduced into the vehicle speed signal terminal 67 of the operating circuit 200 when the vehicle starts traveling. The diode 66 connected between the vehicle speed signal terminal 67 and the vehicle speed signal input port SP of the MPU 1 is connected to the input port SP of the MPU 1 because the on/off signal of the 12V vehicle power supply is normally applied as the vehicle speed signal.
This prevents a voltage of 12V from being applied to the
Transistor 6 connected to output ports R24 and R13 of MPU1 via base resistors 70 and 71
8, 69 are the ports R24, R1 of MSU1
3 is a level conversion transistor for converting the on/off signal at 68 to an on/off signal for the vehicle power supply voltage of 12V, and the transistor 68,
The collector of 69 is connected to the power supply terminal 43 via collector resistors 72 and 73. The relay driving transistors 74, 75, 46, and 77 are transistors that energize the switching relay coils 90, 91, 92, and 93, respectively, and their emitters are all connected to the power supply terminal 43, and their collectors are connected to the output terminal 78. , 79, 80, and 81, respectively, and the bases of the transistors 74, 76 are connected to the collector of the level conversion transistor 69 via base resistors 82, 84, and the bases of the transistors 75, 77 are connected to the base resistor 83. ,85
It is connected to the collector of the level converting transistor 68 via. Diodes 86, 87, 88, 89 inserted between the collectors of relay driving transistors 74, 75, 76, 77 and ground are as follows:
Absorbs reverse voltage generated from switching relay coils 90, 91, 92, 93 of motor drive circuits 300, 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, 109, 110, 111.
The gate is inserted between the normally closed terminal NC and the ground, and the gates are connected to terminals 54 and 55, respectively.
Common terminals COM of switching relay contacts 108, 109 and switching relay contacts 110, 111 are connected to 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. It can be opened and closed. As described above, the two motors 2 and 3 act as a speed reduction mechanism to rotate both drive shafts 96 and 97, respectively. The position detecting switches 98 and 99 are turned off while the top 120 is being opened or closed, and turned on 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 state 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 4 is closed, a current flows from the power supply positive terminal through the switch 4, the diode 115, and the relay coil 92 to the ground, turning on the switching relay contact 110 and connecting the common terminal COM.
contacts the normally open contact NO. Switching relay contact 11
0 turns on, the power terminal 112,
Power is supplied from the normally open contact NO of the switching relay contact 110, the common terminal COM, the high frequency coil 102, and the diode 113 to the power terminal 43, and the operating circuit 200 is activated. MPU1 has power terminal 4
When power is supplied to the capacitor 31, the capacitor 31 is charged from the ground side, and is reset by delaying the voltage application to the RST port from the VDD port. At this reset, output port R13 of MPU1,
R24, FET3, FET1 and BZ are all at low potential (hereinafter, low voltage is simply referred to as "L", and high voltage is referred to as "H").
), and the transistors 41, 50, 52
Then, transistors 68 and 69 are all turned off, and transistors 74, 75, 76, and 77 are turned off as transistors 68 and 69 are 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. Top open command switch 4 for 0.5 seconds or more
(or the top closing command switch 5) is pressed, the process advances to step 604. This loop occurs when the top opening/closing device malfunctions when switch 4 or switch 5 is accidentally touched, and when the top 120 opens (or closes) while the vehicle is running, the top 120 receives wind while the vehicle 119 is running. prevent it from becoming unstable. 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, the switch 4 connects the diode 115 and the terminal 46 to the MPU.
A voltage is applied to the input port O/C of No. 1, and that port O/C becomes "H". Further, when the top closing command switch 5 is closed and the top opening command switch 4 is open, the port O/C is connected to the pull-down resistor 4.
9, it is set to "L". Said input port O/C
When 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.
If the result is positive, the process returns to step 600 and the following operations are not performed. That is, vehicle 119
The top 120 is not opened or closed while the vehicle is running.
If the judgment result in step 606 is negative, it is judged in step 607 whether or not the open flag is set, and in the present example, a positive result is obtained, so step 608 is carried out.
The output port R13 of the MPU 1 is set to "H", the level conversion transistor 69 is turned on, the switching relay driving transistors 74 and 76 are turned on, and the current from the output terminals 78 and 80 causes the switching relay coil 90, 92 is turned on, and the common terminal COM of the switching relay contacts 108, 110 is connected to the normally open terminal NO. Then, voltage is supplied from the positive terminal of the vehicle's power supply to the power supply terminal 43 from the normally open terminal NO of the switching relay contact 110 via the common terminal COM, the high-frequency coil 102 and the diode 113. 74 and 76 are maintained in the on state, and the switching relay coils 90 and 92 are self-maintained. Therefore, even if the operator releases the top opening command switch 4 after 0.5 seconds, voltage continues to be supplied to the power 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 ports FET1 and FET3 of the MPU 1 are set to "L", and the level conversion transistors 50 and 52 are turned off, so that the output terminals 54 and 55 of the operating circuit 200 are connected to the field effect transistors 62 and 63. By applying a voltage to the gates of field effect transistors 64 and 65, these field effect transistors 62 to 65 are turned on.
Therefore, the lower side of the motors 2 and 3 is the high frequency coil 10.
1, 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 and the motor 3 are in a positive state. The drive shafts 96 and 97 are rotated via the deceleration mechanism, and the top 120 begins to open.

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). When the output port BZ of the MPU 1 is set to "H", the driving transistor 41 is turned on and the ceramic buzzer 40 sounds, and when the output port BZ is set to "L", the driving transistor 41 is turned off and the buzzer 40 is turned on. stops blowing.

Next, in step 612, the rotation speed of the motor 2 becomes faster than the rotation speed of the motor 3, so that the potential of the terminal 10 from the rotation synchronization sensor 27 becomes "L".
Input port SW indicates whether it has risen to “H” from
4. 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 that the synchronous pulse of the motor 3 is a rising edge, and if the result is positive, the process proceeds to step 61.
7. Similar processing is performed in steps 618 and 619 to perform synchronization correction. In the process of step 619, contrary to the above, MPU1
The output port FET3 of is set to “H” and the output port
Since FET1 is set to "L", the rotation speed of motor 3 is synchronized with the rotation speed of motor 2. In this way, since the motors 2 and 3 are always operated in synchronization, the hood 120 is not tilted, and the vehicle 11
It is opened parallel to both left and right sides of 9. When it is determined in steps 614 and 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, by turning on either the position detection switch 98 or 99, the potential of the terminal 12 or 13 changes from "H" to "L".
It is determined whether there has been a change in If the judgment result in step 620 is positive, this means that either the left or right side of the hood 120 is 10 degrees away from the closed end or 10 degrees in front of the open end. Of these, position detection switches 98, 99
turns off the field effect transistors 62, 63 or field effect transistors 64, 65 of the motors 2, 3 on which side has changed to on, until the position detection switches 99, 98 of the other motors 3, 2 change from off to on. , the field effect transistors 62, 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, it is determined that the vehicle 119 has started running (by opening the top 120 to the desired position, etc.). Therefore, in step 623, the field effect transistors 62 to 65 are turned off, and in step 624, the switching relay coils 90 and 92 are turned off, thereby releasing the self-holding state and stopping the opening operation of the top 120. Step 626 is a process of determining whether or not the motors 2 and 3 are locked based on the pulse interval of the rotation synchronization sensors 27 and 28. If a human body or the like gets caught in the top 120 during the opening operation of the top 120, or other Similarly, when the motors 2 and 3 are locked due to the top opening/closing device being locked due to a malfunction, or when the motors 2 and 3 are stopped due to the top 120 being fully opened, the rotation synchronization sensors 27 and 28 The pulse interval becomes significantly longer. In this case, the determination result in step 626 is positive, and step 627 is performed.
The field effect transistors 62 to 65 are turned off, and the buzzer 40 is turned on for 1 second in step 628 to notify that the motor is locked abnormally or the operation has ended, and then the switching relay coil 90 is turned off in step 629.
and 92 are turned off, self-holding is released,
The opening operation of the top 120 is automatically 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 hood 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 to being easy to use, the drive mechanism is short and the hood does not twist due to installation errors. Further, since the rotation of the motor is controlled electronically, it is possible to provide a compact vehicle hood opening/closing device that has a simple drive mechanism and does not take up much space. What's more, since the two motors operate in synchronization, the hood will not tilt, 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. It has many excellent effects as mentioned above.

Furthermore, the vehicle hood opening/closing device of the present invention senses when a human body or the like is caught in the hood and automatically stops operation, and also stops operation when the hood opening/closing device is locked due to other malfunctions. As a result, fires caused by heat generation in the motor are prevented, resulting in an excellent effect of being extremely safe.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the vehicle top opening/closing device of the present invention, FIG. 2 is a front view showing a vehicle equipped with the top, 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, 74, 75, 76, 77 ...Transistor for driving switching relay, 90, 91, 92, 93
...Switching relay coil, 98,99...Position detection switch, 108,109,110,111...
Switching relay contact.

Claims (1)

[Scope of Claims] 1. In a vehicle hood opening/closing device that opens and closes a hood that can be opened and closed around drive shafts provided on both left and right sides of a vehicle, there are provided two parts that each rotate the drive shafts via a deceleration 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; an opening/closing command determining means for determining whether either the top opening switch or the top closing command switch is operated; and when either the top opening command switch or the top closing command switch is operated; a rotation synchronization sensor provided in at least one of the two motors and emitting a pulse synchronized with the rotation of the motor; a rotation synchronization correction means that reduces the rotation speed of one of the motors and synchronizes the rotation speeds of both motors; and a motor lock that detects locking of both motors by detecting the width of a pulse generated by the rotation synchronization sensor. A vehicle top opening/closing device comprising: a detection means; and an operation stop means for stopping the operation of the actuation means when a signal from the motor lock detection means is present.