JPS6164981A - Window opening and closing control apparatus - 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, for example, an opening/closing control device for a power window device of an automobile, and in particular to a window that improves safety when the window glass is closed. This invention relates to an opening/closing control device.

[Background technology] For example, in the case of power windows for automobiles, the window glass is controlled by controlling the forward or reverse rotation of an electric motor.
It is configured to be driven upward (UP) in the closing direction and downward (DOWN) in the opening direction.

The electric motor that opens and closes the window glass is controlled by an operation switch mechanism that specifies the ascending direction and descending direction. However, such a window opening/closing device (
1. If a foreign object such as a hand is caught between the window glass and the window frame when the window glass is being raised to close it, the window glass raising operation must be stopped. However, if the window glass is operated only with the operation switch, there may be cases where the user does not notice that the foreign object is caught.

[Problems to be Solved by the Invention] This invention has been made in view of the above-mentioned points. In this case, if a foreign object is caught between the window glass, the window glass can be controlled to stop, and this type of window glass drive! It is an object of the present invention to provide a window opening/closing control device that allows an II control mechanism to be controlled with greater safety.

Means for Solving Problem L] That is, in the window opening/closing control device according to the present invention, the semi-dangerous area, the dangerous area, and the trapping of foreign matter are controlled in accordance with the rising position of the window glass in the closing direction. This method sets a safety area where there is no safety area, and sets a reference current value corresponding to each area.The load current of the electric motor that drives the window glass is set to a reference current value corresponding to each of the areas classified above. In comparison, in the semi-dangerous region and the dangerous region, when the load current value exceeds the reference current value, it is determined that a foreign object has been caught.

[Function] That is, in the forward danger area and the danger area set corresponding to the raised position of the window glass, the load current value of the electric motor that drives this window glass is the reference current set corresponding to each area. If the value exceeds the value, a foreign object may become caught between the window glass and the window frame.
It is determined that there is resistance to the movement of the window glass, and if such a state is detected, the electric motor is stopped and reverse control is performed to stop the window glass from rising or lowering. Safety control is performed to prevent large force from being applied to the trapped foreign object. In addition, in the safety area where the window is in a substantially closed state, the window is determined to be closed when the load current value exceeds the reference current value〇 [Example] Below , an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the configuration of a drive control circuit for, for example, an automobile window glass. For the electric motor 11 for driving the window glass, the power supply VC is connected to a relay switch 12a or 13a.
The supply is controlled via the forward and reverse rotations to drive the window glass in the upward (UP) or downward (DOWN) directions. The relay switches 12a and 13a are driven and controlled so as to close when the excitation current is set to be supplied to the relay coils 12b and 13b, respectively.
The excitation 1a current for b is controlled by switching by transistors 14 and 15, respectively.

Further, the electric motor 8111 is provided with a load current detection circuit 17 using a resistor 16, and a current value detection signal of this load current detection circuit 17 is supplied to the control circuit 19 via an amplifier 18 for setting. do.

The control circuit 19 is set to be supplied with an operation signal from an operation switch 20 that generates a window glass opening/closing control device. This switch 20 includes an a contact point that specifies the closing direction of the window glass, and a b contact point that specifies the opening direction. Furthermore, first and second detection contacts 21 and 22 are set to divide the movement area of the window glass, and a detection signal obtained when these contacts 21 or 22 are closed is also sent to the control circuit 19. supply settings.

Then, the control circuit 19 controls the transistor 1.
4 or 15 to rotate the electric motor 11 in the forward or reverse direction, thereby driving the window glass up or down.

FIG. 2 shows the configuration of the drive structure of the window glass 23 whose opening/closing drive is controlled by the drive control circuit □ circuit as described above. A gear 25 is provided. This gear 2
Reference numeral 5 has a rotating shaft 26 set in its mold portion, and is driven to rotate as shown by an arrow 27 in response to the rotation of the electric motor 11.

A lever mv429 is connected to this gear 25 to drive the window glass 23 to rise and fall as shown by arrow 28 as the gear 25 rotates. That is, in response to the rotation of the electric motor 11, the window glass 23 is driven in the closing direction (upward) or in the opening direction (downward).

Here, for the window glass 23, especially when moving in the closing direction, area division points A and B are set as shown in FIG. 3, corresponding to the raised position of the window glass 23. I have to. At this dividing point A, the distance between the upper end of the window glass 23 and the lower end of the window frame 30 is, for example, 200 mm.
mm, and the range below this point A is set as a quasi-dangerous area for the foreign object 31 to be caught. Further, point B is set at a position where the distance d from the lower side of the window frame 30 is, for example, 5 mm, and the area between these points A and B is set as a dangerous area for foreign objects 31 to be caught. Do it like this. Then frame 3 from point B
The range up to the lower end of 0 is set as a safe area in which the foreign object 31 will not be caught.

In other words, a semi-dangerous area, a dangerous area, and a safe area are set according to the raised position of the window glass 23, and the above-mentioned points A and B that divide this area are set.
Detection contacts 21 and 22 by a limit switch mechanism are set on the gear 25 corresponding to each point, and these contacts 21 or 22 are activated when the upper end of the window glass 23 reaches point A or point B. It is then closed, and a detection signal is supplied to the control circuit 19.

FIG. 4 shows the state of drive N flow I of the electric motor 11 when the window glass 23 is driven to close from the fully closed state to the fully closed state. The current becomes large. Thereafter, the current state becomes constant, and at the time when the window glass 23 is fully closed, t2
The maximum current state is reached during this period.

The control circuit 19 sets a reference current value IO in response to such a steady state of change in the driving current of the electric motor 11, and this reference current value IC is in the semi-dangerous region up to point A. 11, in the dangerous area between points A and B, set the current I2 smaller than the above ■1, and furthermore, in the safe area after point B, set the maximum current value 1.
max is set and stored. In the control circuit 19, the load current detection circuit 1 of the electric Y411
The detection value obtained from step 7 and the reference current value 1c set and stored above are compared, respectively, in correspondence with the region set as above.
This detects the state in which the object is caught.

FIG. 5 shows the state of the operation flow of the control circuit 19. First, in step 100, the operating state of the operating switch 20 is determined. When, step 1
At 01, both the open and open signals are set to the clear state. When the operation switch 20 is set to the open command state to open the window glass 23, specifically, when the contact of the switch 20 is set to the b contact side, the process proceeds to step 102, and the window glass 23 is closed. After clearing the open signal, an open signal is output, and a gate signal is given to the transistor 15 to excite the relay coil 13b and switch 13a.
close the motor 11 and move the motor 11 to the window glass 23 opening side (DOW
N').

Then, when the operation switch 20 is turned on to the a contact side and an opening command is given to close the open window glass 23, the process proceeds from step 100 to step 103,
Outputs the closing signal after clearing the closing signal. This closing signal gives a gate signal to the transistor 14 to close the relay switch 12a, and gives a rotation command (UP) in the open direction to the motor 11, which drives the motor 11 to rotate in the opposite direction to the open state. . That is, the window glass 23 is driven in the opening direction.

After the opening signal is output in this way, the load current of the motor 11 detected by the load current detection circuit 17 is compared with the set reference current. Since a large current sometimes flows, this state is held in step 104 for a time t1 until the starting current returns to the steady current state. Then, after this time t1 has elapsed, the process proceeds to step 105, where the state of the operation switch 2o is checked again.If the opening request is no longer present, that is, the opening or stop request is in the state, the process returns to step 100 and step 101 or The process then proceeds to step 102.

If the open command state of the switch 20 is confirmed in step 105, the process proceeds to the next step 106, where it is determined whether the window glass 23 is in a semi-dangerous area.

This determination is performed by recognizing the states of first and second detection contacts 21 and 22 attached to a gear 25 driven by an electric motor 11. It is confirmed that the upper end of the line has not yet reached the division point A, and it is confirmed that the area is in the semi-dangerous area. If it is determined in this step 106 that it is not a semi-dangerous area, then in the next step 107, whether or not the position of the window glass 23 is in a dangerous area is determined by checking the states of the detection contacts 21 and 22 in the same way as above. Discern.

That is, in steps 106 and 107, it is determined whether the window glass 23 is in a semi-dangerous area, a dangerous area, or a safe area. and 110.

Then, in step 108 corresponding to the semi-dangerous area, the reference current value c is set to 11, and in step 109 corresponding to the dangerous @ area, the reference current value c is set to 12. In a corresponding step 110, a reference current value (C) is set to 7 max.

In steps 108 and 109 above, the reference current value IC is
11 or I2, the process proceeds to step 111, where the IC is set to the voltage [11
In step 10, when lJc>IJ, that is, the load current is within the normal range,
5, the opening operation of the window glass 23 is continued.

Further, if a state of rlc<H is detected in step 111, the load current of the motor 11 is higher than the reference value, and in this case, the foreign object 31 has been caught in the window glass 23 during the opening operation. is in a state where it can be detected. Therefore, in this case, the process proceeds to step 112, where the opening signal is cleared, the opening signal is output, and the window glass 23 is driven in the opening direction. This driving in the opening direction is performed in the next step 113.
After continuously releasing the trapped state of the foreign object 31 for the time t3 set in , the process proceeds to step 114, where the opening signal is cleared, the window glass 23 is stopped, and the process returns to step 100. In this state, the operation switch 20 is still
If it is in the opening command state, the above operation is repeated again to execute the opening operation of the window glass 23, and the opening operation is continued while confirming that no foreign object 31 is caught.

Further, if the window glass 23 is not in the semi-dangerous area or the dangerous area but is in the safe area, the process proceeds to step 110, and from step 110 to step 115.
Then, the reference current value 1c and the load current 111 are compared. Then, when the load current I is still smaller than the reference current value jc, it is determined that the window glass 23 is not completely closed yet, and the process returns to step 105 to continue the closing operation.

Then, in step 115, the load current I becomes reference current IC<
When it is determined that IC=Imax> is larger than IC=Imax, this state is held for a time t2 in the next step 116, and after confirming that the window glass 23 is definitely set to open, the process proceeds to step 117. , the window opening operation is completed by clearing the closing signal.

In the above embodiment, a detection contact mechanism 21, 22 such as a limit switch is used as a means for determining whether a window glass is in a semi-hazardous area, a dangerous area, or a roughly safe area. For example, it can also be constituted by a potentiometer RM4 driven by teeth I25 or 24. That is, by using such a potentiometer structure, the window glass 2
The position No. 3 can be determined more precisely, and the reference current value can also be set more precisely in accordance with that position.

FIG. 6 shows an embodiment in such a case, in which the output signal of the potentiometer 32 supplied with the power supply voltage Vc is supplied to the control circuit 19.

In FIG. 6, the same components as those in FIG. 1 are given the same reference numerals, and their explanations will be omitted.

[Effects of the Invention] As described above, in the window opening/closing control device for, for example, an automobile according to the present invention, when driving the window in the closing direction, the window is moved in accordance with the position of the window glass. A reference current value for the electric VJ machine that drives the glass is set, and the load current of the motor is compared and monitored in a state in which it is compared with this reference current value.

In particular, in this case, corresponding to the position of the window glass, semi-dangerous #A
A window glass, a danger area, and a safety area are set respectively, and foreign objects caught in the window glass can be effectively detected in the states corresponding to each set area, and a fully closed state can be detected. This type of electric window opening/closing device can be controlled very effectively and in a highly safe manner without malfunctions or the like.

[Brief explanation of drawings]

FIG. 1 shows a window opening/closing control tiI according to an embodiment of the present invention.
FIG. 2 is a configuration diagram showing an example of the opening/closing mechanism of the window, FIG. 3 is a diagram explaining the state of the area set in the window, and FIG. 4 is a diagram illustrating the state of the area set in the window. The corresponding motor load current state g and base 11! FIG. 5 is a flow chart explaining the operating state of the control device, and FIG. 6 is a configuration diagram showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Electric motor, 12a, 12b... Relay switch, 14.15... Transistor, 17... Load current detection circuit, 19... Control circuit, 20... Operation switch, 21.22...・Detection contact (window glass position)
, 23... Window glass, 30... Window frame, 31.
...Foreign object. Applicant's agent Patent attorney Suzue A 3 Figure 1 Figure 4 Figure 2 Figure 5 Figure 6

Claims (1)

[Claims] The window opening/closing mechanism controls driving of the window glass in the opening and closing directions by an electric motor, and the window opening/closing mechanism sets semi-hazardous areas, dangerous areas, and safe areas depending on the closing position of the window glass, and defines the positions where each area is divided. means for detecting a reference current value corresponding to each of the above-mentioned regions; and means for detecting a load current of the motor that drives the window glass in the closing direction, means for comparing with a reference current value set corresponding to the area; and means for determining that a foreign object has been caught in a state where the load current value in the semi-dangerous area or the dangerous area exceeds the corresponding reference current value; A window opening/closing control device comprising means for comparing with the reference current value and determining that the load current value in the safe area is fully closed when the load current value exceeds the reference current value.