JPS62133276A - Hood switchgear for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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. However, 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, compact, and has a top that operates while the vehicle is running, preventing the vehicle from running. To provide a vehicle hood opening/closing device that does not become unstable.

"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 rotation 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 the opening or closing of the top. an opening/closing command determining means for determining whether the top opening command switch or the top closing command switch has been operated; a vehicle running determining means for determining the rising edge of the vehicle speed signal; and a top opening command switch or the top closing command switch. At least one of the two motors is provided with actuating means for actuating the self-holding means to open and close the top when one of the command switches is operated for a predetermined period of time and there is no rise in the vehicle speed signal; a rotation synchronization sensor that emits a pulse synchronized with the rotation of the motor; and a rotation that synchronizes the rotation speeds of both motors by reducing the rotation speed of one of the two motors when the pulse is detected by the rotation synchronization sensor. Provided is a vehicle hood opening/closing device characterized by comprising a synchronization correction means.

"Function" - According to the above configuration, the hood will not operate while the vehicle is running and make the vehicle run unstable, and the hood will be opened and closed when the vehicle is stopped. is prevented from opening/closing.

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 switch 4.5 is a pushbutton switch and is closed only when operated.

In the operating circuit 200, reference numerals 6, 7, 8, and 9 are input protection diodes of the control microcomputer 1 (hereinafter simply referred to as MPU 1). When MPU1 input capo) SW4. The MPUI is protected by short-circuiting SW6 with a diode 6.7, and by short-circuiting it with a diode 8.9 when a negative direction surge is applied. 14, 15, 16.17 are also input protection diodes, and terminals 12.13 of the input part of the operating circuit 200
Diodes 15 and 17 conduct negative surges to terminal 12.
．． 13 is shorted by the diode 14.16, and the input port SW3. SW
Protect 5. Resistors 18, 19, 20, and 21, 22 are pull-up resistors. Resistor 23 and capacitor 24. and a resistor 25 and a capacitor 26 are rotation synchronous sensors 27, 2
This is an integrating circuit that eliminates noise caused by the chattering of the 8. Resistors 29.30 are input ports SW5. of MPU1. S
Reset port R8 of 0MPU1 which is the protection resistor of W3
A capacitor 31 connected to T is a power-on reset capacitor, a charging resistor is provided inside the MPUI, and a diode 32 is a discharging diode for the capacitor 31. 33 is a ceramic oscillator that generates a clock signal for operating the MPUI;
34 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 supply input port VDD of the MPUI are connected to a voltage (5.5V) for operating the MPU 1 from the vehicle power supply voltage, which is usually 12V, which is applied to the power supply terminal 43.
) constitutes a constant voltage circuit. 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. Ceramic buzzer 4 connected to power terminal 43
0 is a buzzer for informing the operator of the operating state of the hood opening/closing device, and the buzzer 40 is equipped with a drive transistor 4.
1 is connected in series, and the base of the transistor 41 is connected to the buzzer output port BZ of the MPUI via the base current limiting resistor 42.
The Zener diode 44 and resistor 45 connected to the input terminal 46 of the vlAW4 close command switch circuit 500
The circuit constitutes a circuit for detecting that the top opening command switch 4 has been opened, and a voltage equal to the power supply voltage m(+) of the vehicle is applied to the terminal 46 when the top opening command switch 4 is closed. Therefore, it is a constant voltage circuit to maintain the same voltage as the operating power source of MPU 1.

A capacitor 47 connected in parallel with the Zener diode 44 forms an integration circuit for noise prevention, and connects the non-grounded end of the Zener diode 44 and the input port O/C of the MPUI.
A resistor 48 for input protection is connected between the
A pull-down resistor 49 is connected in parallel with the Zener diode 44 for constantly applying a low voltage (hereinafter simply referred to as L) to the boat 07'C. A transistor 50 whose base is connected to the output port FETI of MPUI via a base resistor 51, and an output port FETI
The transistor 52 whose base is connected to the MPUI output port FET1 and output port FET3 through the base resistor 53 is a level conversion transistor for converting the voltage on/off of the MPUI output port FET1 and output port FET3 to the on/off of the vehicle power supply voltage. The collector outputs of the transistors 50, 52 are connected to the output terminals 54, 55 of the actuating circuit 200 via resistors 6, 57, respectively. The collectors of transistors 50 and 52 are connected to power supply terminal 43 via collector resistors 58 and 59, respectively.

Said resistor 56,57 and motor drive circuit 300°40
Although the hood opening/closing device of this embodiment operates even without the built-in Zener diode 60.61, the field effect transistors 62, 63.6 of the motor drive circuit 300.
Reference numeral 4 and 65 are voltage-operated elements, and since almost no gate current flows, a contact failure is likely to occur at the terminal 54.55 of the in-vehicle lead wire, so the resistor 56.57
Zener diodes 60, 61 cause a current of approximately several milliamperes to flow through terminal 54, 55 when transistor 50, 52 is off, thereby preventing contact failure of the connector at terminal 54, 55.

A vehicle speed of No. 13 is introduced into the vehicle speed signal terminal 67 of the operating circuit 200 when the vehicle starts running. The diode 66 connected between the vehicle speed signal terminal 67 and the MPUI's vehicle speed signal boat SP is connected to the MPUI because the on/off signal of the vehicle power supply (12V) is normally applied as the vehicle speed signal.
Prevent the voltage of 12V from being applied to the input port SP of U1.

Base resistor 70 on MPUI output ports R24 and R13
．． Transistors 68 and 69 connected through 71 are
These are level conversion transistors for converting the on/off signals at the ports R24, R13 of the MPUI into the on/off signals of the 12V vehicle power supply voltage, and the collectors of the transistors 68, 69 are collector resistors 72, 73.
It is connected to the power supply terminal 43 via. The relay driving transistors 74, 75, 76, 77 are transistors that energize the switching relay coils 90, 91, 92□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.
81 respectively, and their transistors 74 and 76
The base of transistor 75.77 is connected to the collector of level conversion transistor 69 via base resistance 82.84, and the base of transistor 75.77 is connected to the collector of level conversion transistor 68 via base resistance 83.85. There is. Relay drive transistor 74°75.76
．． Diode 86 inserted between the collector of 77 and ground
．． 87, 88, 89 are motor drive circuits 300, 400
absorbs the reverse voltage generated from the switching relay coils 90.91.92.93. 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.

Motors 2 and 3 of the motor drive circuits 300 and 400 are DC ferrite motors, and each has a rotation synchronization sensor 27 and 28 on the armature, such as a reed switch that turns on and off once per rotation of the armature. . Further, the motors 2 and 3 have a speed reduction mechanism consisting of a multi-stage gear train, and have position detection switches 98 and 99 on the drive shaft 96°97 of the hood 120, which is the final output shaft thereof. High frequency coils 100, 101, 102, 103 connected in series with the motors 2, 3, and capacitors 104, 1 inserted between the power supply sides of these coils and ground.
Nos. 05, 106, and 107 prevent spark noise emitted from the brushes of the motor 2.3 from entering a radio or the like. The field effect transistors 62, 63, 64, 65 are motor intermittent transistors that switch the motor 2.3 for speed adjustment, etc.
- The sources and drains of 63, 64, and 65 are inserted between the normally closed terminals NC of switching relay contacts 108, 109, 110, and 111 and the ground, and the gates are connected to terminals 54 and 55, respectively. The common terminals COM of the switching relay contacts 108, 109 and 110, 111 are connected to the motor 2.3 via high frequency coils 100, 101, 102, 103, and these switching relay contacts 1
08-109, 110 and 111 are connected to the normally open terminal NO4i power terminal 112. The switching relay contact 1
08/109, 110/111 and switching relay coil 90
．． Reference numerals 91, 92, and 93 constitute switching relays for switching the rotation directions of the motors 2 and 3, respectively.

In the motor drive circuit 400, diodes 113 and 114 connecting the top and bottom of the motor 3 and the power supply terminal 43 prevent the armature of the motor 3 from being short-circuited, and supply power to the actuating circuit 200 from the brushes of the motor 3. Diode 11 connecting the top release command switch 4 and the switching relay coil 92
5 and a diode 116 connecting the top closing command switch 5 and the switching relay coil 93, when these command switches 4.5 are closed, the field effect transistors 64.6
When 5 is 0FFI, the voltage generated by motor 3 is at power supply terminal 43.
is applied to the vehicle power supply through the emitters and collectors of the transistors 75, 77 or 74, 76, thereby blocking the current flowing into the vehicle power supply.
76. Prevent the destruction of 74. field effect transistor 6
Motor 2 when switching 2/63 and 64/65
, 3, varistors 117 and 118 are connected in parallel with the sources and drains of these field effect transistors 62, 63 and 64, 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 around 6.97. The two motors 2 and 3 are connected to both drive shafts 96 via the reduction mechanism as described above.
97 respectively. The aforementioned position detection switch 98
．． 99 is on while @120 is being opened or closed, and is turned off 10 degrees before the open end or closed end.

"Operation" Figure 3 showing the MPUI program and the above-mentioned Figure 1.
The operation will be explained with reference to the figure and FIG.

FIG. 1 shows the situation when the circuit is not activated. At this time, the hood opening command switch 4 and the hood evacuation switch 5 are IM released, and the normally open contact No.
Since voltage is only applied to the motors 2 and 3 and the power supply terminal 43 of the operating circuit 200 is not supplied with the voltage of the positive terminal of the power supply of the vehicle, due to noise etc.
will not malfunction, right here and now, the hood 1 of vehicle 119
20 is in a fully closed state and the top opening command switch 4 is pressed to open the top 120, the operation will be explained. When the top opening command switch 4 is closed, the switch 4. Diode 115. A current flows through the relay coil 92 and the ground, the switching relay contact 110 is turned on, and its common terminal C○M contacts the normally open contact No. When the switching relay contact 110 is turned on, the power terminal 1 is connected from the power supply positive terminal.
12, normally open contact No. of switching relay contact 110, common terminal COM, high frequency coil 102 and diode 113
Power is supplied to the power supply terminal 43 from the power supply terminal 43, and the operating circuit 200 is operated. The MPUI is reset when the capacitor 31 is charged from the ground side when power is supplied to the power supply terminal 43, and the voltage application to the R8T port is delayed from the VDD port. At this reset, MPUI output ports R13, R24, FET3. FETI and BZ are all at low potential (hereinafter, low voltage is simply referred to as "°L", and high voltage is referred to as '°L').
transistors 41, 50°52 and transistors 68 and 69 are all turned off, and transistors 74 and 74 are turned off due to transistors 68 and 69 being turned off.
75.76.77 will be off. At this time, MPUI
First, initial settings are made for each flag head and counters in step 600, and then steps 601 and 602
The loop checks whether the vehicle speed signal has gone from 'L' to 'H'. After ￥A open command switch 4 (or top close command switch 5) is pressed for 0.5 seconds or more, the process proceeds to step 604. This loop is used to open and close the top when switch 4 or switch 5 is touched by mistake. equipment malfunction;
and @120 opens (or closes) when the vehicle is running
This prevents the hood 120 from being exposed to the wind while the vehicle 119 runs unstable.Next, in step 604, it is determined whether the hood opening command switch 4 or the hood closing switch 5 has been pressed. . When the top opening command switch 4 is closed like a step stripping, voltage is applied from the switch 4 to the input port O/C of the MPUI via the diode 115 and the terminal 46, and the boat 0/C becomes H" In addition, when the delivery closing command switch 5 is closed and the hood opening command switch 4 is open, the boat O/C is set to "L" by the pull-down resistor 49.The input boat ○/C is H", the 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 performed. is not performed, that is, the top 120 is not opened or closed while the vehicle 119 is running.If the determination result in step 606 is negative, it is determined in step 607 whether or not the open flag is set; Since a positive result is obtained in the current stage peeling, the MP
The output port R13 of U1 is set to "H", the six level conversion transistors are turned on, the switching relay driving transistors 74, 76 are turned on, and the output terminals 78, 80 are turned on.
The switching relay coil 90.92 is turned on by the current from the common terminal C of the switching relay contact 108° 110.
OM is connected to normally open terminal No. Then, voltage is supplied from the vehicle's positive power supply terminal 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, so that the relay driving transistor 74 of the operating circuit 200 76 is maintained, and the switching relay coils 90 and 92 are self-maintained. For this reason, the top opening command switch 4 is set to 0.
．． After 5 seconds, release your hand and connect the power terminal 4 of the operating circuit 200.
3 continues to be supplied with voltage.

Note that, contrary to the case of step stripping, when the top closing command switch 5 is closed, the switching relay coil 91 and the switching relay coil 93 operate in the same manner to achieve self-holding, and the switching relay contact 109. Since the common terminal COM of 111 is connected 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. The opposite is true.

In step 610, the output port FE of MPU1
By setting TI and FET3 to L'' and turning off level conversion transistor 50.52, field effect transistor 62.63 and field effect transistor 64.65 are output from output terminals 54 and 55 of operating circuit 200.
These field effect transistors 62-65 are turned on by applying a voltage to their respective gates.

Therefore, the lower side of the motors 2 and 3 is the high frequency coil 101.1.
03, common terminal CO of switching relay contacts 109, 111
M, normally closed terminal NC and field effect transistor 62.6
3 and 64 and 65, the motors 2 and 3 start rotating in the forward direction, the drive shafts 96 and 97 are rotated through the reduction mechanism, and the hood 120 is rotated. begins to open up.

Step 611 is a process in which the buzzer 40 is intermittently turned on and off at 0.5 second intervals to notify that the top is being opened (or closed). The transistor 41 is turned on, the ceramic buzzer 40 sounds, and when the output capacitor (BZ) is set to "L", the driving transistor 41 is turned off and the buzzer 40 stops sounding.

Next, in step 612, the rotational speed of the motor 2 becomes faster than the rotational speed of the motor 3, so the rotation synchronization sensor 2
Input whether the potential of terminal 10 from SW4.7 has risen from L'' to H'. Judging from the signal to SW6, if it is a rising edge, the internal counter ■ of MPU1 is incremented by 1, and the difference between the internal counter ■ that counts pulses from input port SW4 and the internal counter n that counts pulses from input port SW6 becomes 2 or more. , and the value of internal counter ■ is larger, output port FET1 of MPU1 becomes H.
As a result, the level conversion transistor 50
is turned on and the potential of the output terminal 54 becomes "L", so
The field effect transistors 62 and 63 are turned off, and the current to the motor 2 is cut off, so that the rotational speed of the motor 2 is reduced by the load on the motor 2.

Since the output port FET3 of the MPU1 is 'L', the level conversion transistor 52 continues to be off, and since the output terminal 55 is 'H', the field effect transistor 64 remains off.
．． 65 is kept on, and the rotation speed of motor 2 is synchronized with the rotation speed of motor 3.

In step 616, it is similarly determined whether the synchronous pulse of the motor 3 is a rising edge, and if the result is positive, step 617. Step 618 and Step 61
9, similar processing is performed to perform synchronization correction.

In the process of step 619, contrary to the above, the output port FET3 of the MPUI is set to "H" and the output port FETI is set to "L", so that the number of revolutions of the motor 3 is synchronized with the number of revolutions of the motor 2. Since the motors 2 and 3 are always operated synchronously, the top 120 is not tilted and is opened parallel to both left and right sides of the vehicle 119.In steps 614 and 618, the internal counter 1 When the difference between ．■ is determined to be less than 2, motors 2 and 3
is rotated again.

In this embodiment, the counter 1. When the difference in (2) is 2 or more, synchronization correction is performed.

In step 620, first, the position detection switch 98.9
9 turns on, it is determined whether the potential of terminal 12 or terminal 13 changes from "H" to "OFF". When the judgment result in step 620 is positive, the hood 120
In this case, either the left or right side of the motor reaches 10 degrees in front of the open end, so in step 621, the field effect transistor of the motor 2, 3 of the motor 2, 3 on the side where the position detection switch 98, 99 is turned on is 62 and 63 or field effect transistors 64 and 65 are turned off, and the other motor 3
, 2 until the position detection switches 99, 98 of 2 change from off to on, the field effect transistors 62, 63 or 6
4.65 off and drive shaft 96 from motor 2.3
．． 97 position corrections are performed.

In step 622, it is determined whether or not there is a rising edge of the vehicle speed signal, and when the determination result is positive, (the hood 120
Vehicle 119
In this case, the field effect transistors 62 to 65 are turned off in step 623, and the switching relay coils 90 and 92 are turned off in step 624, so that the self-holding is released and the opening operation of the top 120 is released. will be stopped.

Step 626 is a process of determining whether or not the motor 2.3 is 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 locking or the top 120 being fully opened, step 62 is performed.
6 is positive, the field effect transistors 62 to 65 are turned off in step 627, and step 62
After the buzzer 40 is turned on for one second at step 8 to notify the end of operation, the switching relay coils 90 and 9 are turned on at step 629.
2 is turned off, 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 m5ec 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 embodiment, by providing the rotation synchronization sensors 27 and 28 on both the motor 2 and the motor 3, the speed of the slower one of the motors 2 and 3 is adjusted to the speed of the faster motor. The speeds of are made to be the same, but
The winding section is set to ``AMI'', and the rotational speed of both motors is increased by 20-30%.
By making a difference, it is possible to omit the field effect transistor of the motor with a lower rotational speed and the associated output circuit.

"Effects" As stated above, the vehicle top opening/closing device of the present invention is easy to operate because it is driven by a motor, and since the motor is divided into left and right sides, the drive mechanism is simplified and installation is easy. In addition to being easy to use, the drive structure can be short, so the hood will not twist due to installation errors, etc. Also, since the motor rotation is controlled electronically, the drive structure is simple. It is possible to provide a small vehicle hood opening/closing device that 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 gFl closing device is not in use, there will be no malfunction due to noise, etc. There are many excellent effects as described above.

Further, since the vehicle hood opening/closing device of the present invention includes a vehicle running determination means and prevents the hood from opening or closing while the vehicle is running, the hood does not operate while the vehicle is running and the vehicle running becomes unstable. This has an excellent effect.

[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...Switching relay driving transistor, 90,91,92.93...Switching relay coil, 98.99...Position detection switch, 1
08, 109, 110, 111...Switching relay contact. Figure 2

Claims (1)

[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, two motors rotate each of the drive shafts via a reduction mechanism; A switching relay that switches the rotation method of both the motors, a switching relay drive transistor that switches and drives the switching relays, and a top opening command switch and a top opening command switch that respectively command opening or closing of the top. , opening/closing command determining means for determining which of the top opening command switch and the top opening command switch has been operated; and vehicle running determining means for determining the rise of the vehicle speed signal; either the top opening command switch or the top opening command switch. is operated for a predetermined period of time and there is no rise in the vehicle speed signal, the self-holding means is actuated to open and close the hood; a rotation synchronization sensor that emits a pulse, and rotation synchronization correction means that reduces the rotation speed of one of the two motors to synchronize the rotation speeds of both motors when the pulse from the rotation synchronization sensor is detected. A vehicle hood opening/closing device characterized by: