DE19523209C1 - Actuator for motor-driven door, window or roof-panel of motor vehicle - Google Patents

Abstract

The movable wing or panel is driven by a reversible DC motor (6) when the contact (RS) of a relay (R) is closed and the direction of movement is selected by a reversing switch (US1). The electronic relay operation stage (RB) receives inputs (18,19) from transducers (W1,W2) responsive to the settings of the reversing switch and a position-detecting switch (US2). The motor is shorted (16) by drop-out of the relay contact when the coil is de-energised by the operation stage, which incorporates two inverted set/reset flip-flops and a logic circuit comprising two NAND gates and an invertor. The operation stage is set by movement of the wing or panel into a reference position.

Description

The invention relates to an actuating device for movable parts for closing of openings, such as windows, doors or roof openings, in vehicles with one in it Direction of rotation reversible DC drive motor for driving the movable part, an operating switch, a polarity reversal device in the motor circuit for application a DC voltage to the motor circuit with either one or the other Direction of motor rotation corresponding polarity, a relay arrangement, by means of which the Drive motor can be short-circuited depending on a position detection level, wherein the relay arrangement has at least one DC relay, which is present when a first voltage level on the control circuit assigned to it Switch contact closes and when a second voltage level is applied to it Control circuit opens the switch contact, with the control circuit (s) the Relay arrangement an electronic relay actuation stage associated with memory behavior is, and wherein the operating switch and the position detection level with the relay actuation level keep in touch.

Such an actuating device is known from EP 0 306 950 A2. Here is to the Switch contacts of the control switch together with the control circuit of the relay one relay operation stage having several transistors via one Full-wave rectifier bridge connected in parallel to the motor circuit. Of the Motor circuit consists of a series connection of the reversing switch contacts, the motor and a relay contact controlled by the relay. If the relay contact drops out this one inductive brake circuit and the motor is stopped. The Position detection level consists of a position detection switch that is in the open position Switch position is when the movable part is in a reference position and is otherwise closed. The circuit is arranged so that the reversing switch is actuated  in the reference position of the movable part, d. H. with the position detection switch open, a setting the relay actuation stage, whereby the relay contact is closed and the Motor moves. If the movable part leaves the reference position, the closes Position detection switch, the relay actuation level is reset and the Motor movement continued. If the movable part moves back into the reference position, so the position detection switch opens and the relay contact is ejected, causing the Motor winding is short-circuited for inductive braking and the motor automatically stops.

The described actuation device does not completely guarantee safe stopping in the reference position. It is the mechanical one Configuration movable part / electric drive so slow that after the automatic Switch off the drive when entering the reference position by opening the Position detection switch over the zero position mark again in the other direction the position detection switch closes again while the button is still pressed The polarity switch will continue to move the drive. The desired automatic In this case, the movable part was not stopped in the reference position. A is reliable functionality of the actuating device known from EP 0 306 950 A2 not always guaranteed. In terms of security and ease of use Actuator such a behavior can have a very adverse effect.

The invention has for its object an actuator for moving parts to close openings, such as windows, doors or roof openings, in vehicles create which is easy to use and with a simple structure reliable automatic stopping of the movable part in a reference position at any time guaranteed.

This object is based on the features mentioned in the preamble of claim 1 solved by an actuator that is designed so when set Relay actuation level always the second voltage level is present at the relay arrangement and that the Relay actuation stage by moving the movable part into a reference position is settable and when moving the movable part from the reference position their state maintains.  

The inventive device causes that when moving the movable part in the Reference position the relay actuation level stores that the condition for automatic The engine is switched off. Should the movable part move due to the mechanical Inertia of the movable part and the drive unit again from the reference position move out before the part has come to a complete standstill, so the drive not automatically resumed, as for example in EP 0 306 950 A2 known device, since the relay actuation stage by crossing the The reference position mark is not reset and the relay is therefore not activated.

Advantageous embodiments of the invention are specified in the subclaims.

The position detection stage has a position detection switch, the positions of the Position detection switch and the control switch are each converted into a signal.

It is also provided that the polarity reversal device and the operating switch are one unit form.

This allows the use of only one relay, making the Component effort can be kept low.

It is also provided that the relay actuation stage two flip-flops and one Identifies logic level, the flip-flops being connected to one another via the logic level, the signals from the position detection level and control switch at inputs of the flip-flops and the Logic level are created, the logic level the signals from position detection level and Control switch and the output signal of the first flip-flop logically linked and the resulting signal is present at an input of the second flip-flop, and wherein the Output of the second flip-flop is connected to the control circuit of the relay.

This enables a simple construction from standard logic modules, so that inexpensive manufacture and reliable function are guaranteed.

It is also possible that the relay actuation stage has a negative flank-triggered flip-flop, the output of the flip-flop with the Control circuit of the relay is connected and the flip-flop on the signal of the Warehouse detection level is triggered.  

This enables a reduced component expenditure.

Exemplary embodiments of the actuating device according to the invention are as follows described in more detail with reference to the drawings. Show it

Fig. 1 is a schematic block diagram of a first embodiment of an actuation device according to the invention,

Fig. 2 is a diagram of the relay-actuating stage of the actuation device of FIG. 1 according to a first embodiment;

Fig. 3a shows an example had temporal course of the signals in the relay actuating stage in FIG. 2 according to the embodiment of Fig. 2,

FIG. 3b, an exemplary time course of the signals in the relay actuating stage in accordance with a modified embodiment in Fig. 4,

Fig. 4 is a diagram 1 of the relay actuating stage of the actuation device of FIG. According to a modified embodiment, and

Fig. 5 is a schematic block diagram of another embodiment of an actuation device of the invention.

In the illustrated exemplary embodiments, a direct current drive motor 6 , which can be reversed in its direction of rotation, serves to actuate, for example, a sliding roof or a window pane, as a result of which a roof or window opening of a vehicle can be closed or at least partially exposed. The adjustment takes place in a known manner, for example via a pressure-resistant drive cable.

The invention is described below with the aid of the actuation of a sliding roof. The term "sunroof" is to be understood in general terms, ie it is intended to have sunroofs, spoiler roofs and sunroofs with one or more lids or cover parts as well as folding roofs and combinations of such roofs. The part that can be moved by the motor 6 is then generally the cover or covers of the sunroof.

In the embodiment illustrated in FIG. 1, in the motor circuit of the drive motor 6 there is an operating switch US1, hereinafter called the pole-reversal actuation switch, which has two mechanically coupled switch contacts US11 and US12. By actuating the switch US1 by hand, lines 13 and 14 connected to the connection contacts US11 and US12 can optionally be connected to the positive and negative or to the negative and positive side of a DC voltage source 15 , for example a motor vehicle battery. The switch contacts US11 and US12 are automatically reset to the zero position shown by a spring device, not shown.

The drive motor 6 lies between the lines 13 , 14 in series with a contact RS of a relay R. The relay contact RS, as illustrated, disconnects the motor circuit when the relay R has dropped out and closes an inductive braking circuit leading via a line 16 . The relay R is a normal DC relay, which closes the switch contact RS with respect to the motor circuit when a voltage sufficient for its actuation is present and brings the contact into a position interrupting the motor circuit (shown in FIG. 1) when the relay is connected R applied voltage drops to a value at which the holding current of the relay R falls below. If the switch contact RS is in its working position closing the motor circuit, voltage is applied to the drive motor 6 with one or the other polarity by actuating the switch US1, and the motor 6 is accordingly made to run in one direction or the other. The control circuit (line 17 ) of the relay R is supplied with the corresponding voltage signals by a relay actuation stage RB via a converter W3. Furthermore, a position detection stage is provided which has a position detection switch US2, which can be designed, for example, as a microswitch, and a converter W2, which converts the switch position into a logic signal, ie whether the switch is open or closed. In a similar manner, a converter W1 is provided, which converts the position of the pole-reversal actuation switch into a logic signal, ie whether the switching contacts US11 and US12 are in the zero position or not. The signals from the converters W1, W2 are each applied via lines 18 , 19 on the input side to the relay actuation stage RB.

An exemplary embodiment of the internal structure and the internal connection of the relay actuation stage RB is illustrated in FIG. 2. Two flip-flops FF1, FF2 are provided, which in the present example are designed as inverted RS flip-flops. The signal of the converter W2 is applied to the set input S1 of the first flip-flop FF1. The signal of the converter W1 is applied to the reset inputs R1, R2 of the first flip-flop FF1 and the second flip-flop FF2. Furthermore, a logic stage LS is provided, which is connected on the output side to the set input S2 of the second flip-flop FF2. The logic stage LS is made up of two NAND gates and an inverter. The signal of the converter W2 and the signal of the output Q1 of the first flip-flop FF1 are present at the two inputs of the first NAND gate G1. The output of the first NAND gate G1 is present at the input of the inverter and its output is present on an input of the second NAND gate G2, the signal from the converter W1 being present at the second input of this gate. The output of the second NAND gate G2 is connected to the set input S2 of the flip-flop FF2. The output Q2 of the flip-flop FF2 is finally connected to the input of the converter W3.

FIG. 3a shows a time course of the logic signals of the converters W1 and W2 and of the flip-flop outputs Q1 and Q2 of the embodiment shown in FIG. 2. When the switch US2 is closed, the converter W2 outputs 1, otherwise 0. The converter W1 outputs 0 when the pole-reversal switch US1 is in the zero position shown in FIG. 1 and outputs 1 when the switch US1 is actuated. The converter W3 only outputs a voltage sufficient to attract the relay R to the relay R when the output Q2 of the flip-flop FF2 is at 0.

The cover is initially in a reference position, ie it is closed. The pole reversal switch US1 is in the zero position (time A). The signals from the transducers W1 and W2 are 0 and 1, respectively. Flip-flop FF1 is thereby reset, so that the output Q1 becomes 0. In this signal constellation 1, the logic stage LS is present at the set input S2 of flip-flop FF2. 0 is present at the reset input R2, so that the flip-flop FF2 is reset and the output Q2 of flip-flop FF2 becomes 0. The relay contact RS is closed via the converter W3. However, since pole reversal switch US1 is not actuated, there is no voltage at motor 6 and motor 6 is at a standstill.

If the pole reversal switch US1 is now actuated (time B), the signal of the converter becomes W1, and thus the signal at the reset inputs R1 and R2, to 1. The flip-flop FF1 remains in the previous, d. H. reset state, as well as the flip-flop FF2. The exit Q2 remains at 0 and thus the relay switch RS in the closed state. Now that Motor circuit through the reversing switch US1, d. H. the contacts US11 and US12 is closed, the motor starts in a direction of rotation corresponding to the polarity and the The lid starts to move.  

As soon as the cover passes the zero position marker, the position detection switch US2 (time C) and the signal from the converter W2, and thus the signal at the set input S1 of the flip-flop FF1, open to 0. The flip-flop FF1 is thereby set and the output Q1 to 1. However, the logic stage continues to output 1 to the set input S2 of the flip-flop FF2, so that this remains in the previous, ie reset state, the output Q2 remains at 0 and the relay switch remains closed, so that the Motor 6 continues to run.

If the pole-reversal switch US1 is released later, it returns to the zero position and the converter W1 now outputs 0 (time D). Since both S1 and R1 now have 0, the flip-flop FF1 is in an undefined state, ie the output Q1 can be 0 or 1. In both cases, the logic stage LS gives 1 to the set input S2 on the basis of the given signal constellation. Since 0 is now present at reset input R2, flip-flop FF2 is reset and output Q2 remains at 0, ie the relay switch remains closed. However, since the motor circuit is opened by contacts US11 and US12, motor 6 stops.

If the pole-reversal switch US1 is closed again, this time in a different direction, the signal of the converter W1 becomes 1 again (time E), the flip-flop FF1 is set, ie the output Q1 becomes 1, at the set input S2 1 is still present, and 1 is also present at reset input R2, so that flip-flop FF2 remains in the previous, ie reset state, output Q2 remains at 0 and relay switch RS remains closed. The voltage applied to the motor 6 has now been reversed in relation to the initial situation, so that the motor 6 begins to rotate in the opposite direction.

When the cover passes the zero position marker again, the position detection switch US2 closes and the converter W2 outputs 1. 1 is present at both inputs S1 and R1, so that the flip-flop FF1 remains in the previous, ie set, state. Output Q1 remains at 1. Since all inputs of logic level LS are now at 1, 0 is now applied to set input S2. Reset input R2 remains at 1, so that the flip-flop FF2 is now set, ie the output Q2 becomes 1. The converter W3 now outputs a voltage which causes the relay R to drop, so that the relay switch RS opens the motor circuit and closes the inductive braking circuit of the motor 6 formed by the line 16 . The drive motor 6 is therefore braked automatically.

If a relatively large mechanical inertia of the sunroof / electric drive system occurs, it can happen that the cover moves after the relay R has dropped beyond the zero position so far that the zero position marking is passed over in the other direction again. In this case, the position detection switch S2 opens again, so that the signal from the converter W2 becomes 0 (time G). The flip-flop FF1 is thereby set, ie the output Q1 remains at 1. Since not all inputs of the logic stage LS are now 1, 1 is applied to the set input and the flip-flop FF2 remains in the previous, ie set state. The output Q2 remains at 1 and the brake circuit of the motor 6 remains closed via the dropped relay contact RS, so that the motor does not start again despite closed contacts US11 and US12 and the movement of the cover finally comes to a complete stop.

If the pole reversal switch US1 is then released, it returns to its zero position and the Converter W1 outputs 0 as a signal (time H). This state now corresponds exactly to the one above described state at time D, d. H. the flip-flop FF2 is reset, the Output Q2 supplies 0, converter W3 supplies one that is sufficient to attract the relay Voltage, the relay contact RS opens the brake circuit and closes the Motor circuit again. The next time the pole-reversal switch US1 is actuated, the Then start the motor again.

In an alternative embodiment of the relay actuation stage, instead of the two static flip-flops FF1, FF2, a single flank-triggered flip-flop can be provided. In the embodiment of the relay actuation stage shown schematically in FIG. 4, a negative edge triggered D flip-flop FF3 is provided with a static, inverted reset input R3 which is connected to the output of the converter W1. The clock input CL3 is connected to the converter W2 via an inverter, and a 1 signal is constantly present at the D input D3 of the flip-flop FF3. The output Q3 is connected to the converter W3. When the flip-flop FF3 is set, the output Q3 supplies 1 to the converter W3, otherwise 0. In this embodiment, the flip-flop FF3 can only be set if the signal of the converter W2 moves into the reference position when the zero position mark is passed ( Time F) changes from 0 to 1. A falling edge is then applied to the clock input CL3 via the inverter, so that the flip-flop FF3 is then set via the 1 signal at the D input, and the brake circuit of the motor 6 is thus closed via the relay switch RS. At times A, D and H, the 0 signal then output by converter W1 causes flip-flop FF3 to be reset via inverted, static reset input R3, so that output Q3 becomes 0. FIG. 3b shows the signal sequence similar to the signal sequence in FIG. 3a for the same movement sequence. Exactly the same internal states and thus the same signals to the converter W3 result for the flip-flop FF3 as for the flip-flop FF2. With regard to the sequence of the converter signals shown in FIGS . 3a and 3b, the two illustrated exemplary embodiments of the relay actuation stage RB thus result in the identical control signals to the converter W3.

A further modification of the relay actuation stage RB can be that a Passing over the zero position marking does not always lead to a setting of the Relay actuation stage RB (i.e. for example the flip-flop FF2 or FF3) leads. Has been For example, drive over the zero position marking from the zero position and the drive then stopped, in the event of a renewed actuation in the other direction, the drive immediately return to the zero position. To do this in this case with the previously described Embodiments to avoid related shutdown of the drive, it is possible that Resetting the actuation level for a certain time after actuation of the control switch keep active, d. H. the setting of the actuation level for a certain time after actuation of the To lock the operating switch.

An alternative embodiment of an actuation arrangement according to the invention is shown schematically in FIG. 5. In contrast to the embodiment according to FIG. 1, the changeover contacts US11 and US12 are not mechanically coupled here, but can be actuated independently of one another by the action of a relay R assigned to them. The control switch US1 is completely separated from the polarity reversal device, ie the changeover contacts US11 and US12. It is made up of two independent switches, each of which acts directly on a converter W1 or W1a. The relay actuation stage RB is of two-channel design here, ie two inputs are provided for the transducers W1 and W1a, to which outputs for two transducers W3 and W3a are assigned. The outputs are independent of each other and are only controlled via the assigned input and the input for the signal of the converter W2 of the position detection stage. The relay actuation stage can be designed similarly to that shown in FIG. 2, the flip-flops FF1 and FF2 and the logic stage LS being provided in duplicate. The function of the relay actuation stage can be the same as in the embodiments described in FIGS. 2 and 4. The converters W3 and W3a each control the relay assigned to them. The connection of the polarity reversal device is selected so that it forms an inductive brake circuit for the motor 6 when the relay is actuated appropriately. A separate brake circuit is therefore not necessary. If both operating switches US1 are not actuated, both relays have dropped out and the position of the switches US11 and US12 causes the motor 6 to be short-circuited. The actuation of one of the two switches of the control switch US1 can, via the relay actuation stage RB, with the corresponding position of the position detection switch US2, cause a relay to be activated and the motor to rotate in one direction. An actuation of the other switch of the operating switch US1 can (with the corresponding position of the position detection switch US2) pull the other relay so that the motor rotates in the other direction. If both or no switches of the operating switch US1 are actuated, the motor 6 is short-circuited.

The present invention has been explained using several exemplary embodiments, but is shown in FIG in no way limited to these embodiments. So in the Relay actuation stage also other edge-triggered or non-edge-triggered Tilting members such as B. JK flip-flops can be used, or the circuit will not work with integrated components, but built from individual components.

Reference list

6 drive motor
13 line
14 line
15 power source
16 line
17 line
18 management
19 management
US1 pole-reversal switch
US2 position detection switch
US11, US12 changeover contacts
FF1, FF2, FF3 flip-flop
S1, S2 set input
R1, R2 reset input
Q1, Q2, Q3 output
R relay
RS relay contact
RB relay actuation level
W1, W2, W3 converter
LS logic level
D D input
CL clock input
G1 NAND gate
G2 NAND gate

Claims (17)

1.Operating device for movable parts for closing openings, such as windows, doors or roof openings, in vehicles, with a reversible directional drive motor for driving the movable part, an operating switch, a reversing device in the motor circuit for applying a direct voltage to the Motor circuit with a polarity optionally corresponding to one or the other direction of motor rotation, a relay arrangement by means of which the drive motor can be short-circuited depending on a position detection level, the relay arrangement having at least one DC relay which, when a first voltage level is applied to the control circuit assigned to it, has the associated switch contact closes and when a second voltage level is applied to its control circuit opens the switch contact, with the control circuit (s) of the relay arrangement being an electronic relay actuation stage with memory is connected, and wherein the operating switch and the position detection stage are connected to the relay actuation stage, characterized in that
that when the relay actuation stage (RB) is set, the second voltage level is always present at the relay arrangement (R); and
that the relay actuation stage can be set by moving the movable part into a reference position and maintains its state when the movable part moves out of the reference position. 2. Actuating device according to claim 1, characterized in that the Polarity reversal device (US11, US12) and the control switch (US1) form a unit. 3. Actuating device according to claim 1, characterized in that the Polarity reversal device (US11, US12) and the relay arrangement (R) form a unit. 4. Actuating device according to claim 3, characterized in that two independent relays are provided that are controlled separately. 5. Actuator according to one of the preceding claims, characterized characterized in that the reset of the relay actuation stage (RB) exclusively by operating the control switch (US1). 6. Actuating device according to one of the preceding claims, characterized characterized in that moving the movable part into the reference position immediately sets the relay actuation level (RB).   7. Actuating device according to one of claims 1 to 5, characterized in that after actuating the control switch (US1), setting the relay actuation level (RB) is locked for a predetermined time. 8. Actuating device according to one of the preceding claims, characterized characterized in that the position detection stage has a switch (US2) which at a movable position within the reference position movable part and a second switching position when the movable part is moved out of the reference position takes, the position detection stage corresponding to a first or second signal releases the relay actuation stage (RB). 9. Actuating device according to one of the preceding claims, characterized characterized in that a converter stage (W1) is provided which determines the position of the Control switch (US1) converts into a signal. 10. Actuating device according to one of the preceding claims, characterized characterized in that the relay actuation stage (RB) has a first and a second flip-flop (FF1, FF2) each with a zero reset input (R1, R2) and one input (S1, S2) has priority to set to one. 11. Actuating device according to claim 10, characterized in that the signal of Position detection level and the signal of the control switch (US1) each on the Priority input (S1) or at the zero input (R1) of the first flip-flop (FF1) is present. 12. Actuating device according to claim 10 or 11, characterized in that the Output (Q1) of the first flip-flop (FF1) via a logic stage (LS) with the Priority input (S2) of the second flip-flop (FF2) is connected and the signal of the Operating switch (US1) on the zero input (R2) of the second flip-flop (FF2). 13. Actuating device according to claim 12, characterized in that the logic level (LS) on the input side the signals of the position detection level and the control switch (US1) and the output signal of the first flip-flop (FF1) logically linked and the priority input (Q2) of the second flip-flop (FF2) with the output signal of the Logic level is applied. 14. Actuating device according to one of claims 10 to 13, characterized in that the output (Q2) of the second flip-flop (FF2) via a converter stage (W3) is connected to the control circuit of the relay (R).   15. Actuating device according to one of claims 1 to 9, characterized in that the relay actuation stage (RE) a negative edge triggered flip-flop (FF3) having. 16. Actuating device according to claim 15, characterized in that the output the flip-flop (FF3) via a converter stage (W3) with the control circuit of the relay (R) communicates. 17. Actuating device according to claim 15 or 16, characterized in that the Toggle element (FF3) is triggered on the signal of the position detection stage.