JPS62133278A - 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.

2. Prior Art As conventional vehicle top opening/closing devices, manual devices and hydraulic devices are known. However, manual devices are difficult 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-mentioned problems, and is easy to operate, small in size, and can be used when a human body gets caught in the canopy or other malfunctions. An object of the present invention is to provide a vehicle top opening/closing device capable of automatically stopping power supply to a motor when the top opening/closing device is locked.

"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 drive transistor that switches and drives both of the switching relays, and a top opening command switch and a top opening command switch that respectively command the opening or closing of the yoke. , opening/closing command determining means for determining which of the top opening command switch and the top opening command switch is operated, and opening/closing the top when either the top opening command switch or the top opening command switch is operated. an actuating means; a rotation synchronization sensor provided in at least one of the two motors and emitting a pulse synchronized with the rotation of the motor; and a rotation synchronization sensor that emits a pulse synchronized with rotation of the motor; 7; rotation synchronization correction means for reducing the rotation speed and synchronizing the rotation speeds of the two motors; and motor lock detection means for detecting locking of the two motors by detecting the width of a pulse emitted by the rotation synchronization sensor; There is provided a vehicle hood opening/closing device characterized by comprising an operation stopping means for stopping the operation of the actuating means when a signal from the motor lock detecting means is present.

"Function" 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 rotation speed of both motors decreases, so the width of the pulses 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 first motor drive circuit 400 whose main element is the second motor 3, and a top opening command switch 4 and a top opening command switch 5 for commanding opening or closing of @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, 6, 7, 8, 9 are input protection diodes of the control microcomputer 1 (hereinafter simply referred to as MPUI), and a forward surge is applied to the terminal 10.11 of the input section of the operating circuit 200. When MPU 1 input port SW4. The MPU 1 is protected by shorting SW6 with a diode 6.7, and by shorting it with a diode 8.9 when a negative surge is applied. 14, 15, 16, and 17 are also input protection diodes, and the terminals 12, [
Diodes 15 and 17 pass the negative surge to terminal 1.
The forward surge from 2.13 is blocked by diode 14.16, and the man-powered boat SW of MPU 1
3. Protect SW5. Resistance 18.19, 20, 21.
22 is a blue resistor. Resistor 23 and capacitor 2
4. The resistor 25 and capacitor 26 are an integrating circuit that eliminates noise caused by chattering of the rotation synchronization sensors 27 and 28. Resistor 29.30 is input port SW5 of MPU1. The capacitor 31 connected to the reset port RST of 6MPU1, which is the protection resistor of SW3, is a capacitor for power-on reset, and the charging resistor is M
The diode 32 is provided inside the PLII, and is a diode for discharging the capacitor 31. 33 is ~1P
This is a ceramic oscillator that generates a clock signal for operating U1, and 34 and 35 are capacitors that stabilize the oscillation of the ceramic oscillator 33. M'
A resistor 36 and a Zener diode 37 connected to the power input port VDD of the PUI form a constant voltage circuit for creating a voltage (5V) for operating MPtJl 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 supply 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 in series. Base current limiting resistor 4
A Zener diode 44 and a resistor 45 connected to the input terminal 46 of the zero operation circuit 200 connected to the buzzer output capo (BZ) of the MPUI through the It constitutes a circuit for detecting that the hood is closed, and when the hood opening command switch 4 is closed, the positive (+) voltage of the power supply of the vehicle is applied to the terminal 46, so that it is connected to the operating power supply of the MPU 1. This is a constant voltage circuit to maintain the same voltage.

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 MPU 1.
A resistor 48 for input protection is connected between the
Boat O/C in parallel with Zener diode 44
A pull-down resistor 49 is connected to always apply a low voltage (hereinafter simply referred to as L) to the terminal. A transistor 50 whose base is connected to the output port FET1 of the MPUI 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 output port FET1 and the output of the MPU1. This is a level conversion transistor for converting the voltage on/off of the port FET3 to the on/off of the vehicle power supply voltage, and the collector output of the transistor 50.52 is connected to the output terminal 54° of the operating circuit 200 via the resistor 56°57. 55, respectively. transistor 50.5
The collectors of No. 2 are connected to the 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 Zener diodes 60, 61 built into the motor drive circuits 300, 400, the field effect transistors 2, 63.
64 and 65 are voltage-operated elements, and since almost no gate current flows, terminals 54 and 55 of the lead wire inside the vehicle
(Because poor contact is likely to occur, the resistor 56.
57 and the Zener diode 60.61, when the transistor 50.52 is off, a current of about several milliamperes flows to the terminal 54.55, thereby preventing contact failure of the connector at the terminal 54.55.

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 MPU 1 because the on/off signal of the vehicle power supply (12V) is normally applied as the vehicle speed signal.
This prevents a voltage of 12V from being applied to the input port SP of I.

Base resistor 70 on MPUI output ports R24 and R13
．． Transistors 68 and 69 connected through 71 are
Said baud of MPU1) FL24. This is a level conversion transistor for converting the on/off signal in R13 to an on/off signal of the 12V vehicle power supply voltage, and the collectors of the transistors 68 and 69 are connected to collector resistors 72.7.
3 to the power supply terminal 43. 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 source terminal 4.
3 and its collector is connected to output terminals 78, 79, 8
0.81, respectively, and their transistors 74.
The base of transistor 76 is connected to the collector of level conversion transistor 69 via base resistor 82.84, and the base of transistor 75.77 is connected to base resistor 83.85.
It is connected to the collector of the level converting transistor 68 via. Relay driving transistor 74°75.
Diodes 86.87 and 88.89 inserted between the collector of 76.77 and the ground are connected to the motor drive circuit 300.4.
Absorbs reverse voltage generated from 00 switching relay coils 90.91, 92.93. A diode 94 inserted between the source 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 a capacitor 104.1 inserted between the power supply side of these coils and ground.
0'5, 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 motors 2, 3 for speed adjustment, etc.
The sources and drains of 2, 63, 64, and 65 are inserted between the normally closed terminals NC and ground of switching relay contacts 108, 109, 110, and 111, and the gates are connected to terminals 54 and 55, respectively. Relay contact 108, 109
The common terminals COM of the switching relay contacts 110 and 111 are connected to the motors 2 and 3 via high-frequency coils 100, 101, 102, and 103, and the normally open terminals NO of these switching relay contacts 108, 109, 110, and 111 is connected to power terminal 112. The switching relay contact 10
8/109.110/111 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 delivery and closure command switch 5 and the switching relay coil 93, when these command switches 4.5 are closed, the field effect transistors 64.6
5 is turned off, the voltage generated by the motor 3 is applied to the power supply terminal 43, which blocks the current flowing into the vehicle power supply through the emitters and collectors of the transistors 75, 77 or 74, 76, and the transistors 75, 77, 7.
6. Prevent the destruction of 74. Field effect transistor 62
・When switching 63 and 64/65, motor 2,
Varistors 117 and 118 are connected in parallel with the sources and drains of these field effect transistors 62, 63 and 64, 65, respectively, in order to absorb the reverse voltage generated from the transistors 3.

As shown in FIG. 2, a hood 120 is provided at the top of the car V4119 following the front window glass 121, and the hood 120 supports drive shafts 96 and 97 provided on both left and right sides of the car #119. The center can also be opened and closed in two ways. The two motors 2.3 are connected to both side moving shafts 9 via the reduction mechanism as described above.
Rotate 6.97 respectively. The aforementioned position detection switches 98 and 99 are turned off while the switch 120 is being opened or closed, and turned on at 10 degrees from the open end or the 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 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 voltage is only applied from the power terminal 112 to the normally open contact NO of the switching relay contacts 108, 109, 110° 111. Since the motors 2 and 3 and the power supply terminal 43 of the operating circuit 200 are not supplied with the positive voltage of the power supply of the vehicle, the motors 2 and 3 will not malfunction due to noise or the like. Right here, hood 120 of vehicle 119
is in a fully closed state and the top opening command switch 4 is pressed to open the top 120. 4When the top opening command switch 4 is closed, the power supply from the positive terminal of the power supply to this switch 4 is explained.
．． Diode 115. A current flows through the relay coil 92 and the ground, turning on the switching relay contact 110 and bringing the common terminal COM into contact with the normally open contact No. When the switching relay contact 110 is turned on, the power terminal 112 is connected from the power supply positive pole to the power terminal 112.
, normally open contact NO of switching relay contact 110, common terminal C
Power is supplied from the OM, high frequency coil 102 and diode 113 to 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 the time of this reset, the output ports R13, R24, FET3 . FET113 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 transistor 41. ．． 50°52 and L transistor 8.69 are all turned off, and transistor 74 is turned off by turning off transistor 68.69.
, 75.76.77 are turned off. At this time, the MPU 1 first initializes each flag and counter in step 600, and then in steps 601 and 602.
It is checked whether the vehicle speed signal has risen from "L" to "'H゛°" through the loop. After the top opening command switch 4 (or top closing command switch 5) is pressed for more than 0.5 seconds, step 604 is performed. This loop is caused by malfunction of the top opening/closing device when switch 4 or switch 5 is touched by mistake.
and the hood 120 opens (or opens) 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 turned on like a step peeling, the input port of the MPU 1 is connected from the switch 4 through the diode 115 and the terminal 46.
)-0/C, and that boat 0/C becomes “H”.
”, and when the top closing command switch 5 is in the open position and the top opening command switch 4 is open, the input port O/C is set to "L" by the pull-down resistor 49. When C is "H", an open flag is set in step 605.In 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. Not possible. That is, while the vehicle 119 is running, the top 120 is not opened or closed. If the determination result in step 606 is negative, it is determined in step 607 whether or not the open flag is set, and in the current stage Since a positive result is obtained, M
The output port R13 of the PU1 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.
The current from 80 turns on the switching relay coil 90.92 and connects the common terminal COM of the switching relay contact 108.110 to the normally open terminal NO. Then, from the normally open terminal No. of the switching relay contact 110 to the common terminal COM,
Since voltage is supplied from the vehicle's power supply positive terminal to the power supply terminal 43 via the high-frequency coil 102 and the diode 113, the relay driving transistor 74°7 of the operating circuit 200
6 is maintained in the on state, and the switching relay coil 90.92
is self-maintained. Therefore, voltage continues to be supplied to the power supply terminal 43 of the operating circuit 200 even if the operator releases his hand from the top opening command switch 4 after 0.5 seconds.

Note that, contrary to the case of stage adjustment, 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 to the motors 2.3 is reversed, so the rotation direction of these motors 2.3 is the same as when the top opening command switch 4 is closed. The opposite is true.

In step 610, the output port F of MPU 1
By setting ETI and FET3 to "L" and turning off level conversion transistors 50.52, field effect transistors 62.63 and field effect transistors 64.
By applying voltage to each of the 65 gates,
These field effect transistors 62-65 are turned on.

Therefore, the lower side of the motors 2 and 3 is the high frequency coil 101.1.
03, common terminal CO of switching relay contact 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). When MPUI output port BZ is set to “H”,
When the driving transistor 41 is turned on, the ceramic buzzer 40 sounds, and the output port 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
Judging whether the potential of terminal 10 from 7 has risen from "L" to "H" is determined from the signal to input ports SW4 and SW6,
If it is a rising edge, add 1 to the internal counter ■ of MPU1,
When the difference between the internal counter FET that counts pulses from the input port SW4 and the internal counter If that counts the pulses from the input port SW6 is 2 or more, and the value of the internal counter ■ is larger, the MPUI output port FET1 but"
As a result, the level conversion transistor 5
0 is turned on and the potential of the output terminal 54 becomes "L", the field effect transistors 62 and 63 are turned off, and the motor 2
Since the current to the motor 2 is cut off, the rotation speed of the motor 2 is reduced due to the load on the motor 2.

Since the output port FET3 of MPU 1 is “L”,
Since the level conversion transistor 52 continues to be off and the output terminal 55 is at H'', the field effect transistor 64
．． 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 MPU 1 is set to H'°, and the output port FET
is set to "L", so the rotation speed of the motor 3 is synchronized with the rotation speed of the motor 2. In this manner, 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 internal counter 1. When the difference in If is determined to be less than 2, the motors 2 and 3 are rotated again.

In this embodiment, counters are used to prevent both motors 2 and 3 from being turned on and off at all times. , ■ is 2 or more, synchronization correction is performed.

In step 620, first, the position detection switch 98.9
9 is turned on, it is determined whether the potential of terminal 12 or terminal 13 has changed from "H" to "L". When the determination result of step 620 is positive, either the left or right of the hood 120 is 10° away from the closed end or 10° before the open end, so step 62
1, among the motors 2 and 3, the position detection switch 98,
The field effect transistors 62 and 63 or the field effect transistors 64 and 64 of the motors 2 and 3 on which 99 is turned on.
65 is turned OFF, and the field effect transistors 62, 63 or 64, 65 are kept OFF until the position detection switch 99, 98 of the other motor 3, 2 changes from OFF to ON. 96.97 position correction is performed.

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 (for example, l@120 is opened to the target position). 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 motor 2.3 is locked based on the pulse interval of the rotation synchronization sensors 27 and 28.
Similarly, if the motors 2 and 3 are locked due to the top opening/closing device being locked due to jamming or other malfunction, or if the motors 2 and 3 are stopped due to the top 120 being fully opened, both rotations will be synchronized The pulse interval of sensors 27, 28 becomes significantly longer. In this case, step 62
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 in step 8 to notify that the motor is abnormally locked or the operation has ended, 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 automatically performed. will be stopped.

When the determination result in step 626 is negative, the process waits for 5 m5ec in step 631.

Return to step 611 6 The above operation description is based on the case where the top 120 is opened from fully opened, but when the top 120 is closed from fully opened, the same operation is performed by pressing the top closing command switch 5. It will be done.

"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. The speeds of are made to be the same, but
By adjusting the windings and creating a difference of 20 to 30% between the rotational speeds of both motors, it is possible to omit the field effect transistor of the motor with a lower rotational speed and the associated output circuit.

"Effects" As mentioned 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, the drive mechanism can be short, so the hood will not be twisted due to installation errors, etc. Also, since the rotation of the motor is controlled electronically, the drive mechanism is simple and easy to install. It is possible to provide a compact vehicle hood opening/closing device that 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 has a structure in which a human body or the like is exposed to the hood.
It senses this and automatically stops when the hood is in full operation, and also stops operation when the hood opening/closing device locks due to other malfunctions, which prevents overheating of the motor and fires, making it extremely safe. It has a disturbing 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. DESCRIPTION OF SYMBOLS 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, 9
8.99...Position detection switch, 108,109,1
10,111...Switching relay contact'.

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 the two motors, a switching relay drive transistor that switches and drives 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. and opening/closing command determining means for determining whether either the top opening command switch or the top closing command switch is operated, and a top opening/closing command determining means for determining whether 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; rotation synchronization correction means for reducing the rotational speed of the two motors and synchronizing the rotational speeds of the two motors; and motor lock detection means for detecting locking of the two motors by detecting the width of a pulse emitted by the rotational synchronization sensor. A vehicular hood opening/closing device comprising: and an actuation stopping means for stopping the operation of the actuating means when a signal from the motor lock detecting means is present.