JPH0726187Y2 - Sunroof control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] <Industrial Application Field> The present invention relates to a sunroof control circuit, and more particularly to a sunroof control circuit for accurately positioning a fully closed position.

<Prior art> In a sunroof that can be opened and closed, in order to quickly stop when a foreign object is caught during the closing operation, for example, a pulse synchronized with the rotation of the motor is detected and the pulse cycle is long. In some cases, it is judged that the load on the motor has increased due to this, and the motor is stopped.

By the way, in the fully closed state, it is necessary to bring the sunroof panel into close contact with the inner edge of the opening with a sufficiently large pressure contact force in order to prevent rain leakage, etc. At the load level of 1, it is not possible to secure a sufficient pressure contact force and it is controlled separately. For example, a limit switch for detecting the vicinity of the fully closed position and a limit switch for detecting the fully closed position are arranged, and after the proximity detection limit switch operates during the fully closed operation, the above-mentioned load increase Even if the sunroof panel reaches the fully closed position and the load increases significantly, the motor continues to be driven and is stopped when the fully closed position detection limit switch operates. Therefore, the sunroof panel can be brought into close contact with the inner edge of the opening with a sufficiently large pressure contact force. However, according to the above control circuit, not only is there a problem that the number of parts is increased because it is necessary to provide two limit switches, but also the position of the fully closed position detection limit switch is not accurately positioned, which is sufficient and appropriate. Since it is not possible to secure the pressure contact force,
There is a problem that the positioning work becomes complicated.

<Problems to be Solved by the Invention> In view of the problems of the prior art as described above, the main purpose of the present invention is to reduce the number of parts and to easily perform highly accurate positioning of the fully closed position. It is to provide a sunroof control circuit capable of performing.

[Structure of the Invention] <Means for Solving the Problem> According to the present invention, a purpose is to provide a control circuit for a sunroof capable of opening and closing, and a motor for performing the opening and closing operation. A driving circuit, a predetermined opening detection switch that operates when a predetermined opening near the fully closed position is reached during the closing direction operation, and the closing direction from the time when the operation signal of the predetermined opening detection switch is input. Means for measuring the displacement amount of the operation, and control means for stopping the operation of the drive circuit when the displacement amount measured by the measuring means after the operation signal of the predetermined opening detection switch reaches a predetermined value It is achieved by providing a sunroof control circuit characterized by having:

<Operation> In this way, in the fully closed operation, when the measured value of the displacement amount from the predetermined opening position reaches the predetermined value, it is judged that the fully closed position is reached and the motor drive is stopped. Therefore, it is not necessary to dispose a switch for detecting the fully closed position, the number of parts can be reduced, and the amount of displacement from the predetermined opening detection switch can be changed by changing the predetermined value. It can be stopped in the closed position with high accuracy.

<Embodiment> Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory view schematically showing the outline of an automobile sunroof to which the present invention is applied. In FIG. 1, a sunroof panel 3 capable of opening and closing an opening 2 provided on a roof 1 of a vehicle is driven by a motor 4 so that it can be opened and closed. The motor 4 is provided with a pulse generator 5 as a displacement amount measuring means for generating a pulse synchronized with the rotation of the motor 4, and a pulse signal from the pulse generator 5 is output to a controller 6 described later. ing. Further, a predetermined opening degree detection switch 8 which is a limit switch and is selectively operated by a dog 7 provided on the sunroof panel 3 is disposed near the fully closed position. The predetermined opening degree detection switch 8 has a predetermined distance a in front of the inner edge of the opening 2 during the fully closing operation.
The sunroof panel 3 is activated when the front edge of the sunroof panel 3 reaches a predetermined position, which is the time when the front edge of the sunroof panel 3 reaches the open position.

FIG. 2 shows the main part of the controller 6 of the sunroof control circuit according to the present invention. This controller 6
Is a drive circuit 9 for driving the motor 4, and a control for selectively operating the drive circuit 9 according to the operation of the manual open switch 10, the automatic open switch 11, the manual close switch 12 and the automatic close switch 13. A CPU 14 as a means is provided. In the controller 6, a positive voltage supplied from an on-vehicle battery (not shown) is supplied to the CPU 14 and the drive circuit 9 via each power supply terminal V.

Each of the switches 10 to 13 is a normally open contact, one end of the manual open switch is grounded, the other end is connected to the input terminal I2 of the CPU 14, and the automatic open switch 11
Connected to the input terminal I1 of the CPU 14 via. The automatic open switch 11 and the terminal I1 and the manual open switch 10 and the terminal I2 are connected to the power supply terminal V via the resistors R1 and R2, respectively. The manual close switch 12 and the automatic close switch 13 and the resistors R4 and R3 connected to the power supply terminal V are connected to the input terminals I4 and I3 of the CPU 14 in the same configuration as described above.

The manual open switch 10 is adapted to be in an operating state even when the automatic open switch 11 is operated, and when the manual open switch 10 is operated, a low level signal is input only to the input terminal I2, When the automatic open switch 11 is operated, a low level signal is input to both input terminals I1 and I2. In this way, each switch
The operation states of 10 and 11 can be discriminated. The same applies to each of the close switches 12 and 13.

The forward drive output terminal O1 of the CPU 14 is connected to one end of the solenoid of the relay RL1 via the amplifier AP1, and the other end of the solenoid is connected to the power supply terminal V. The normally open contact of the relay RL1 is connected to the power supply terminal V, and
The normally closed terminal is grounded, and the common terminal is the motor 2
Is connected to one end of. The reverse rotation driving terminal O2 of the CPU 14 is connected to the amplifier AP2 and the relay RL2 which are configured in the same manner as above, and the common terminal of the relay RL2 is connected to the other end of the motor 4.

The pulse generator 9 is a contact type that is repeatedly turned on and off as the motor 2 rotates, and one end of the contact is connected to the input terminal I5 of the CPU 14 and via the resistor R5. Is also connected to the power supply terminal V, and the other end of the contact is grounded. The other end of the predetermined opening detection switch 8 whose one end is grounded is connected to the input terminal I6 of the CPU 14 and also to the power supply terminal V via the resistor R6. This predetermined opening detection switch 8
Is a normally closed contact, for example, and is opened when fully closed.

In the sunroof control circuit configured as described above, when the front edge of the sunroof panel 3 reaches the position a distance a before the inner edge of the opening 2 as described above, during the fully closing operation. When a predetermined opening position is reached, as shown in FIG. 3, an open signal as an operation signal from the predetermined opening detection switch 8 is input to the CPU 14. Then CPU14
At this time, the number of pulses of the pulse generator 5 is started from the time when the operation signal is input, and the count number is a predetermined value corresponding to the distance traveled by the sunroof panel 3 by a predetermined distance a. When it reaches n, the drive signal from the output terminal O2 is stopped to stop the motor 4.

Note that, for example, when a foreign object is caught during the normal opening / closing operation, the load increases, the rotation speed of the motor 4 slows down, and the pulse cycle becomes long. Therefore, a pulse having a preset cycle length is used. When the cycle is reached, it is determined that the load has increased by a predetermined amount or more, and the motor drive signal is stopped. At this time, the magnitude of the set value of the load may be such that, for example, a strong pressing force is not felt when a hand or the like is caught,
At the time of fully closing, it is desirable to make the fully closed state with an extremely large pressure contact force in order to prevent rain leakage and the like.

According to the present invention, as described above, after the predetermined opening degree detection switch 8 is actuated during the fully closing operation, the circuit that determines that the load has increased even if the pulse cycle becomes long, is ignored,
The motor 4 is driven until the count value of the pulse reaches n. The pulse count value is n
Since the motor 4 is stopped when reaching the number of pieces, by appropriately setting the value of n, the sunroof panel 3 can be brought into close contact with the opening 2 very easily with a relatively large pressure contact force. Since the value of n can be arbitrarily set by the CPU 14, the value of n can be appropriately set through an external input device (not shown) while monitoring the pressure contact force during assembly and adjustment. Therefore, the fully closed position can be easily adjusted.

[Effects of the Invention] As described above, according to the present invention, when the measured value of the displacement amount from the predetermined opening reaches the predetermined value at the time of fully closing, it is determined that the motor has reached the fully closed position and the motor is turned on. Since it is stopped, the measurement interval is small and the error can be reduced.By setting the predetermined value appropriately, the fully closed position can be positioned accurately and easily, improving the workability of adjustment. obtain. Further, it is not necessary to use a plurality of position detection switches, and the number of parts can be reduced, so that the assembling workability can be improved. Further, since the displacement amount in the closing direction operation is measured, the sunroof panel can be reliably closed even if the rotation speed of the motor changes due to the voltage change of the battery.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing the outline of the operation of an automobile sunroof to which the present invention is applied. FIG. 2 is a circuit diagram of essential parts of a sunroof control circuit according to the present invention. FIG. 3 is a time chart showing the operation of the sunroof to which the present invention is applied when the sunroof is fully closed. 1 ... Roof, 2 ... Opening 3 ... Sunroof panel, 4 ... Motor 5 ... Panel generator, 6 ... Controller 7 ... Dog, 8 ... Predetermined opening detection switch 9 ... Driving circuit 10 …… Manual open switch 11 …… Automatic open switch 12 …… Manual close switch 13 …… Automatic close switch 14 …… CPU

Continuation of front page (72) Inventor, Hitoshi Suzuki, 2681 Hirosawa-cho, Kiryu-shi, Gunma Mitsuba Electric Mfg. Co., Ltd. (56) Reference JP 62-296081 (JP, A) Actual development Sho 60- 129481 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A control circuit for a sunroof capable of opening / closing, which circuit drives a motor for performing the opening / closing operation, and has reached a predetermined opening degree near a fully closed position during a closing direction operation. A predetermined opening detection switch that operates at times, means for measuring the amount of displacement of the closing direction operation from the time when the operation signal of the predetermined opening detection switch is input, and after inputting the operation signal of the predetermined opening detection switch A control means for stopping the operation of the drive circuit when the displacement amount measured by the measuring means reaches a predetermined value.