DE9211436U1 - Opening with a motor-driven cover element, e.g. Motor vehicle side window - Google Patents

Description

92 G 1 5 Hh Tue

Siemens AG

Opening with a motor-driven cover element, e.g. car side window

The invention is based on the subject matter defined in the preamble of claim 1, which is known to the person skilled in the art. The test circuit usually monitors the size of the motor current in order to detect the jamming of an object. However, DE-Al-40 30 607 (= 90 P 1692)

also known to monitor the closing slot by radar-like methods, or according to the - European Note 92 103 392.4 (= 92 P 8018 E) by specially arranged light barriers, or according to the not yet published

DE-Anm G 92 10 236.0 (= 92 G 1446 DE) by means of seals that are electrically conductive under pressure other than in the relaxed state, e.g. by means of piezoresistive sealing foam rubber masses.

The invention, on the other hand, shows a new way of achieving anti-pinch protection.

The invention was initially developed for the protection against trapping objects in motor-driven side windows of motor vehicles - depending on the type of voltage and measuring method used, which clearly have a capacitive and/or ohmic inherent resistance - and thus particularly concerns the protection of, for example, children, dogs and flowers handed through the window. However, it has been shown that it can also be applied to other arrangements that fall under the above-mentioned generic term. The invention is

92 6 1 5 H EN

namely, for example, also suitable for other types of automatically closing windows, and also for other covering elements for openings such as doors. Sometimes the invention can also provide anti-pinch protection for inanimate objects if they have an ohmic and/or capacitive inherent resistance - depending on the type of voltage used - such as anti-pinch protection for some devices that are located in the narrowing slot of automatically closing covering elements.

Furthermore, it was shown that the invention can also be used to switch off the drive at the end of the closing process as soon as the opening is closed by the cover element without anything being trapped.

The task,

to offer a new, low-effort way to switch off the drive of the cover element is solved according to the invention by the subject matter defined in claim 1.

The objects defined in the subclaims allow additional advantages to be achieved. Among other things, the additional measures according to claim 2 allow the total touchable surface of the front edge to be made as small as possible and, if necessary, as inconspicuous as possible.

3, to avoid the additional attachment of a second body,

4, to be able to apply the advantages of the invention in a case that is particularly important due to the small size or narrow space in the vehicle and, moreover, is particularly common in practice, 5, a special additional effort for automatic

To avoid limit shutdown, 35

92 6 1 5 HH -EN

6, to be able to recognise not only the risk of entrapment in normally moist or more or less sweaty naked body parts, such as bare hands without gloves, but also the risk of entrapment in completely dry body parts surrounded by a very good insulator - even in good time before (1) entrapment occurs, and

7, to be able to close the opening quickly even during an unauthorised break-in or in the event of harassment, without the burglar or harasser being able to easily prevent the closure by triggering the anti-pinch protection; this measure has an inventive significance in its own right, which is why it was covered by an independent protection claim.

The invention and further developments thereof are explained in more detail using the diagram of an embodiment of the invention shown in the figure, which has been presented as simply as possible for the sake of clarity.

The figure shows a car side window opening with a moon

door-driven cover element S, which here is formed by the pane S of the side window. The test circuit P controls the motor M, which is only symbolically indicated here, which represents the drive M of the automatically lifting pane S, by this test circuit P controlling the drive M by means of

of the relay and its contact K is interrupted - possibly also reversing the drive M - if at least during individual phases of the closing process an object G, e.g. an arm G, is jammed in the narrowing slot Z.

The test circuit P can detect this risk of trapping because the opposing slot boundaries L, N are electrically conductive. At least parts of the "front" are electrically conductive, namely when closing at slot Z.

92 G 15 4 *» EN

front edge N of the cover element S as well as at least parts of the elastic seal D opposite the slot Z - e.g. a touchable first body L along this seal D - are electrically conductive, but these slot boundaries L, N are sufficiently electrically insulated from one another - at least during the narrowing of the slot Z.

Between these slot boundaries L, N, at least during individual phases of the closing process, and at least in pulses if not continuously, a voltage U/ground that is acceptable to health is applied. The test circuit P monitors the electrical resistance between the opposing slot boundaries L, N and/or an electrical parameter dependent on this resistance, at least during individual phases of the closing process, e.g. the current mentioned or perhaps also the voltage U and/or the phase angle between the current and the voltage.

As soon as the test circuit P detects a risk of entrapment, it stops the drive M, e.g. using the contact K, if it does not then even reverse the drive M in a known manner. The voltage U/ground can also be applied directly to the conductive slot boundaries L, N by the test circuit P, as indicated in the figure.

The invention is particularly suitable as a protection against pinching body parts G of people and animals, because these have a relatively low and therefore easily recognizable inherent resistance. If such an organic object G is pinched in the narrowing slot Z, the voltage U and/or the current between the slot-35 changes.

92 G 1 5 H OE

limits L, N flowing current quite clearly for the test circuit P:

The first body L can be formed by the seal D itself. This first body L can also be attached to the seal D, which then represents an insulator in itself, or close to the seal D and then represent, for example, a wire along a section of the seal D opposite the front edge of the cover element S. When clamped, this first body L and the front edge N can be short-circuited by the clamped object G, although in special cases the invention can also detect the danger of clamping before the front edge N or the first body L has been touched:

If the voltage U/ground is a continuous or pulsed direct voltage U/ground, then the ohmic resistance between the slot boundaries L, N or electrical parameters dependent on it are easily recognizable by the test circuit P, i.e. can be monitored according to a known concept. As is well known, every skin is more or less moist and represents a resistance of e.g. 10 kOhm, which then acts as a 10 kOhm short circuit between the slot boundaries L, N. However, the pinching is only recognized when the object G forms an ohmic short circuit between the first body L and the front edge N.

The voltage U/ground can also represent a low-frequency or high-frequency alternating voltage. Every organism part G that is at risk of being trapped is relatively well conductive on the inside due to the blood and other body fluids, so that the capacitance increases when the slot Z narrows between the approaching slot boundaries L, N.

92 615HDE

increases when there is a risk of entrapment - and this is the case even when this organism or body part G is not yet touched by one of the two slot boundaries L, N. The test circuit P then measures the capacitive resistance between the slot boundaries L, N or electrical parameters dependent on it according to a known principle, e.g. by detuning oscillating circuits and/or by detuning a Wheatstone measuring bridge, which, however, contains - instead of just ohmic resistors - at least one capacitive measuring resistor of its own - more or less lossy, or not at all lossy - for comparison with the - possibly significantly lossy - capacitive resistance between the slot boundaries L, N.

Advantageously, when alternating voltages U/ground are applied, not only can the risk of entrapment be detected in time for normally moist or more or less sweaty naked body parts, such as bare hands without gloves, but also the risk of entrapment for completely dry body parts surrounded by a very good insulator. The risk of entrapment can advantageously be detected with alternating voltages U/ground even if only one, or even none at all, of the two slot boundaries L, N has touched the body part G.

The test circuit P can also be designed in such a way that it measures both the capacitive and the ohmic resistance between the slot boundaries L, N in order to detect trapping hazards.

In addition, it was shown that the invention - whether direct voltages U/ground and/or alternating voltages U/ground are applied to the slot limits L, N - also serves to switch off the drive M/K at the end of the closing process.

92 6 1 5 U EN

ges can be used, i.e. even when the opening has been closed by the cover element S without jamming an object G. The invention therefore makes it possible to avoid the additional effort required for automatic limit switching.

The invention therefore offers a new, low-effort way to switch off the drive M/K of the cover element S, regardless of whether this motor-driven cover element S is a window, a door or another cover of an opening.

In order to make the total touchable surface of the front edge N of the cover element S as small as possible - and perhaps also inconspicuous - this front edge N can be covered with a conductive second body N - e.g. with a vapor-deposited conductor track or with a more or less narrow metal coating or with a solid, conspicuous metal frame - which is connected to a potential, cf. the ground potential in the figure, of the voltage U/ground, at least during individual phases of the closing process, via a line attached to another edge of this cover element S.

In order to avoid the additional attachment of a second body N to the cover element S, the cover element S itself can be sufficiently conductive and, at least during individual phases of the closing process, can be connected to a potential - e.g. ground - of the voltage U/ground.

If the cover element S is a side window S of a motor vehicle, the advantages of the invention can be applied in this case, which is particularly important due to the small size or narrow space in the motor vehicle and which also occurs particularly frequently in practice. Then even an electrically conductive glass

92 6 1 5 h 4 EN

be used as a cover element S, whereby the effort for attaching a conductive second body N to the front edge N can be eliminated.

In addition, the test circuit P can also be designed in such a way - e.g. with the help of a special, easily accessible emergency switch - that the control of the drive M can be switched off by the test circuit P at least for the remaining duration of an individual closing process. This means that the opening can be quickly closed even during an unauthorized break-in or in the event of harassment, without the burglar or harasser being able to easily prevent the closing by triggering the anti-pinch protection. This measure can be used independently of how the test circuit P detects the risk of pinching, whether using the inventive concept or another concept. This measure was therefore included in an independent secondary claim.

Claims (1)

G 1 5 hh DE Protection claims 1. Opening with a motor-driven cover element (S), e.g. vehicle side window (S), - with a test circuit (P) that interrupts the drive (M/K), possibly also reverses it, if at least during individual phases of the closing process an object (G), e.g. an arm (G), is jammed in the narrowing slot (Z), characterized in that opposite slot boundaries (L, N), namely + both at least parts of the "front" edge (N) of the cover element (S) which is at the front when closing at the slot (Z) + as well as at least parts of the elastic seal (D) opposite the slot (Z) at the opening edge, or a touchable first body (L) along this seal (D), electrically conductive, but - at least during the narrowing of the slot (Z) - electrically insulated from each other, wherein between these slot boundaries (L, N) at least during individual phases of the closing process a voltage (U/mass) that is acceptable to health is applied at least in pulses if not continuously, and that the test circuit (P) measures the electrical resistance between the opposite slot boundaries (L, N) and/or an electrical parameter dependent on this resistance. 2. Opening according to protection claim 1,
characterized in that - the front edge (N) is provided with a conductive second 6 1 5 HH -EN &iacgr;&ogr; Body (N) is covered, which is connected to a potential (ground) of the voltage (U/ground) via a line attached to another edge of the covering element (S) at least during individual phases of the closing process. 3. Opening according to protection claim 1,
characterized in that the cover element (S) itself is sufficiently conductive and is connected to a potential (ground) of the voltage (U/ground) at least during individual phases of the closing process. 4. Opening according to one of the preceding protection claims, characterized in that the cover element (S) is a side window (S) of a motor vehicle. 5. Opening according to one of the preceding protection claims, characterized in that the test circuit (P) is also used for the final shutdown of the drive (M/K) in the last phase of closing the slot (Z). 6. Opening according to one of the preceding claims, characterized in that the voltage (U/ground) is an alternating voltage (U/ground), and that the test circuit (P) monitors - at least additionally, if not exclusively - the capacitance between the slot boundaries (L, N) during closing. 7. Opening with a motor-driven cover element (S), e.g. vehicle side window (S), 92 6 1 5 hh EN 11 1 - with a test circuit (P) which interrupts the drive (M/K), possibly also reverses it, if at least during individual phases of the closing process an object (G), e.g. an arm (G), is clamped in the narrowing 5 slot (Z), e.g. according to one of the preceding protection claims, characterized in that that the test circuit (P) can be switched off at least for the remaining duration of a single closing process. 10