DE102005046868A1 - Door locking device - Google Patents

Abstract

The invention relates to a door locking device, comprising a door holding rod, a brake body interacting with the door holding rod and having an adjustable braking force with respect to the door holding rod, and an adjusting device (18) which detects the position of the door holding rod and controls the braking force of the braking body with respect to the door holding rod. The object of specifying a door locking device which is simple in construction and easy to use is achieved according to the invention in that the door retaining rod has a defined magnetic field (12) and that an induction coil (11) is provided which detects the magnetic field (12) of the door retaining rod.

Description

The The invention relates to a door locking device according to the preamble of claim 1.

such Door locking devices are in particular for Motor vehicle doors known. In practice, difficulties arise when it is important to ensure that the Door in an intermediate position between a fully open and a fully closed Stopped position and found in the intermediate position can, so that a server the door Although it can move on slightly in the intermediate positions, the door can be counteracted by external forces another kind, z. Gusts of wind or shocks, is held securely.

DE 196 22 110 A1 describes a door locking device with a continuously adjustable door lock, which comprises a door retaining bar and as a conical surrounding the door retaining bar clamping jaws, wherein the clamping jaw is surrounded by a spring. By a length of the spring this reduces its cross section and presses the jaws against the door retaining bar. For the length or release of the spring, an electromagnet is provided which surrounds the spring and to the activation of a contact is closed. The disadvantage is that the clamping jaws touched the door retaining bar over a large length range and thus requires a matched to the jaws geometry for the door retaining bar. Another disadvantage is that the structure takes up a lot of space. A further disadvantage is that the release of the clamping jaw requires the actuation of the contact, which is to be carried out by hand, so that the ease of use is limited.

DE 199 01 263 A1 describes a door hinge with a first door hinge part and a second pivotally mounted on the first hinged door hinge part and a fixing unit, wherein the fixing unit has a formed as an outer plate on one of the first door part and the second door part arranged first brake element that with a second, on the other formed by the first door part and the second door part second brake element engages, wherein the second brake element is formed as an inner disk. To set the door hinge, the outer plates engage with the inner plates together, what they are constantly acted upon by a force by a spring. Further, a mechanical switching unit is provided, which switches the first brake element and the second brake element between a coupling state and a disconnected state, wherein the mechanical switching unit is removed to an electrically actuated actuator. The disadvantage is that the engagement of the two brake elements controlling force is derived purely mechanically from the position of the two door hinge parts, so that an operator must apply additional force to overcome the static friction of both brake elements together. Unfavorable is further that actuator claimed a large total space and is elaborately expanded.

EP 0 326 823 A1 describes a door locking device for motor vehicle doors, wherein the door locking device comprises a door retaining rod and cooperating with the door retaining rod brake body. The brake body has a cooperating with a side of the door retaining rod driver, which is positively connected to a trained as a pendulum body member, wherein the pendulum body is pivotally mounted in a holding housing. When operating the door of the driver is constantly in contact with the door retaining bar and learns due to the changing position of the pendulum body dependent on the position of the door braking force with respect to the door retaining bar. The disadvantage is that the braking force is not adjustable, so that the operator must overcome the braking force of the brake body in each position of the door. A further disadvantage is that the braking force along the door retaining bar varies and thus is different for different positions of the door. Unfavorable is also that the motor vehicle door is zurückzuschwenken in the starting position to rebuild a holding torque.

DE 202 06 861 U1 describes a door locking device which is formed as a door hinge with a first door hinge part and a second, hingedly connected to the first door hinge part door hinge part. Within a holder housing, a brake track is provided, which cooperates with a brake body, which controls by means of an adjusting device which detects the position of the door retaining bar and the braking force of the brake body with respect to the door retaining bar. The adjusting device comprises a passive, without external electrical supply trained generator element in the manner of an electrical capacitor, which is charged by the relative movement of the brake body and the brake track. To release the fixed brake body is required to easily move the door hinge, including elastic coupling means are provided to both ends of the brake track. The disadvantage is that the structure is structurally extensive and heavy due to the capacitor element. Another disadvantage is that an operator must apply additional force in order to charge the capacitor of the generator.

DE 44 25 799 A1 describes a door locking device with a door retaining bar, a cooperating with the door retaining bar Bremskör per, which is driven by a control circuit such that it has an adjustable with respect to the door retaining rod braking force, wherein the control circuit detects the position of the door retaining rod. The control circuit is supplied by pulses of a switching device, wherein the switching device comprises a pulser and a pulse generator. The pulley is spaced from the door retaining bar and is driven synchronously with this. The disadvantage is that the structure occupies a large space and includes many items. Another disadvantage is that the pulses generated must first be converted until they are electronically processed. It is also unfavorable that the operator must also use force to drive the pulser and thus activate the actuator at all.

It The object of the invention, a door locking device according to specify the preamble of claim 1, the simple construction and easy to use.

These Task is for said door locking device according to the invention with the characterizing features of claim 1 solved.

has a door retaining bar a defined magnetic field and the magnetic field becomes relative to an induction coil moves such that the induction coil passing through magnetic flux of a temporal change is subject to one of the temporal change of the magnetic flux induces appropriate voltage, which is easily detectable and without further conversion for an evaluation available stands.

The temporal change of the induction coil passing through magnetic flux may due one along the door retaining bar Inhomogeneous magnetic field based, or - alternatively or in addition thereto - on the Movement of the magnetic field with a determined by the operator Speed.

It is thus possible next to the position of the door retaining bar also the speed of the door retaining bar to capture and the more to control the braking force, the faster the door retaining bar is moved. In particular, two information, the position can be the door retaining bar and the speed of the door retaining bar, for controlling the brake body use.

One Another advantage is the fact that the detection of the magnetic field contactless and noiseless takes place, being as additional advantageous proves that a Operator must spend no further force to the actuator to generate or activate. It also proves to be beneficial that the door locking device independent of Tolerances is, especially if a clearance between the door retaining bar and the induction coil is left, the clearance being sized is that the the induction coil passing magnetic flux substantially unchanged remains when the relative position of the door retaining bar to the induction coil slight changes subject.

Preferably is provided that the Door retaining bar a metallic component having a permanent magnetization, wherein the permanent magnetization a defined, permanent and against interference fields clearly demarcated magnetic field provides. Since door retaining rods made of metal blanks For example, steel and magnesium is magnesizable is one Permanent magnetization easy to manufacture.

alternative or in addition For this purpose, the defined magnetic field of the door retaining bar by a permanent magnet caused to be attached to the door retaining bar, especially for the Case, that the Door retaining bar does not comprise an easily magnetizable material blank, allows the to get defined magnetic field. A single permanent magnet, which is about only a section of the door retaining bar extends, allows doing, individual sections of the door retaining bar to mark as stops. Alternatively or in addition to this be provided, magnetized powder, such as iron filings, the Door retaining bar assign, for example, with plastic to encase, where - to a along the door retaining bar inhomogeneous magnetic field - the density of the iron filings or of the magnetized powder varies, for example, in one direction steadily decreasing.

Preferably is provided that the brake body in a holder housing guided is and that the Induction coil on the holder housing is attached, so that the advantage is to attach the induction coil safely and firmly zukönnen and the induction coil claimed no significant space.

Preferably is provided by the magnetic field of the door retaining rod in the induction coil Provide generated voltage signal as a signal to control the brake body, to the actuator from both the position of the door retaining bar as well as depending on the speed of the door retaining bar the Braking force of the brake body in terms of the door retaining bar to be driven.

In particular, it is preferably provided that the adjusting device comprises a transistor with a Emitter includes, and that caused in the induction coil voltage across the emitter drops, so that the transistor is conductive only (and an electrical power consumption takes place) only when a voltage was induced, that is, when the magnetic field has changed significantly, for example, when the operator has caused the door retaining bar to stop by holding the door. In the other case, when the door is moved, no significant voltage is induced, so that the transistor blocks and an electrical power consumption, for example via a car battery, does not occur. Overall, the car battery is only claimed when the brake body with high force to rest against the door retaining bar, so that the car battery is rarely claimed.

Further Advantages and features of the invention will become apparent from the following Description of a preferred embodiment and from the dependent Claims.

The The invention will be described below with reference to the accompanying drawings based on a preferred embodiment a door locking device according to the invention describe in more detail and explained.

1 shows a perspective view of a door retaining rod and an induction coil of a first embodiment of a door locking device according to the invention.

2 shows a schematic diagram of a door locking device according to 1 ,

1 shows a door retaining bar 1 a door locking device, not shown. The door retaining bar 1 indicates at a first end 2 a bearing eye 3 as well as at a second end 4 a T-shaped widening, which is intended as an end stop. In a mounted position, the door retaining bar passes through 1 an unillustrated holder housing. With an effective surface 5 the door retaining bar 1 brake elements, not shown, together, wherein the braking force of the brake body, for example, from the brake bodies to the effective surface 5 applied contact pressure, via an adjusting device is adjustable.

The brake bodies can as with respect to the door retaining bar 1 be designed movable elements that - if not with the door retaining bar 1 interact and make the door freely movable - either not against the door retaining bar 1 spring loaded or out of engagement with the effective surface 5 the door retaining bar 1 should be kept. Alternatively, the brake body may be formed, for example, as rollers, on the active surface 5 can roll off. In a braking position, the rollers of the rollers can be prevented or obstructed, so that a sliding friction occurs instead of a rolling friction, the rollers but still in contact with the effective surface 5 the door retaining bar 1 stay. As an alternative to a rolling roller, a fitting can always with adjustable contact pressure against the effective surface 5 the door retaining bar 1 are pressed, so that it is not absolutely necessary that the brake body relative to the door retaining bar 1 is mobile.

In the body of the door retaining bar 1 introduced are four permanent magnets 6 . 7 . 8th and 9 standing on a side surface 10 the door retaining bar 1 are still visible. The permanent magnets 6 to 9 effect along the substantially rectilinear door retaining bar 1 defined magnetic field, in such a way that in each case a north pole of the permanent magnet 6 to 9 towards the second end 4 the door retaining bar 1 shows. The resulting total magnetic field of the door retaining bar 1 is thus essentially along the door retaining bar 1 directed and a substantial succession of north and south poles, due to the uniform spacing of the permanent magnets 6 to 9 is approximately periodic with each other.

The door locking device further comprises an induction coil attached to the holder housing, not shown 11 with five turns, with the door retaining bar 1 substantially along an axis of the cylindrical induction coil 11 is aligned. The magnetic field of the permanent magnets 6 to 9 interspersed by the induction coil 11 bounded area and represents a magnetic flux whose temporal change at the ends 11a respectively. 11b the induction coil causes an induction voltage.

Opens or closes an operator not shown motor vehicle door, the door retaining bar 1 by the holder housing, not shown, with the induction coil 11 led, which by the induction coil 11 performed defined magnetic field of the door retaining bar 1 due to the strength and arrangement of the permanent magnets 6 to 9 is determined, at each point between the ends 11a and 11b the induction coil 11 induces a voltage.

2 schematically shows the induction coil 11 , wherein the door retaining bar, not shown 1 assigned defined magnetic field 12 for the sake of clarity next to the induction coil 11 is shown. The of the magnetic field 12 in the induction coil 11 between the ends 11a and 11b induced voltage drops across an emitter 13 a transistor 14 from, the transistor 14 a circuit 15 controls, which is a voltage source 16 . in particular the battery of a car battery. A resistance to work 17 is intended to switch a motor, not shown, of the force with which the brake body, not shown, to the door retaining rod 1 be pressed, controls.

The invention now works as follows:
Interspersed, starting from 2 , the magnetic field 12 the door retaining bar 1 the induction coil 11 , will be between the ends 11a and 11b induces a voltage which is signed, depending on whether the magnetic flux through the induction coil increases or decreases. The induced voltage, which may possibly be signed by a rectifier, for example a diode, not shown, then drops over the emitter 13 of the transistor 14 from. Is the sign and the amount of induced, across the emitter 13 decreasing voltage, the transistor becomes 14 switched in the forward direction, and the voltage of the voltage source 16 falls substantially above the working resistance 17 from, so that the motor, not shown, the brake body with respect to the door retaining rod 1 can apply. The transistor 14 , the source of tension 16 and the circuit 15 with the working resistance 17 are thus components of a positioning device 18 indicating the braking force of the brake bodies with respect to the door retaining bar 1 depending on the detected position of the door retaining bar 1 controls.

The magnetic field 12 the in 1 illustrated door retaining bar 1 is through the four towards the door retaining bar 1 aligned permanent magnets 6 to 9 determined, their respective north pole on the second end 4 the door retaining bar 1 is directed. The resulting magnetic field 12 the in 1 illustrated door retaining bar 1 is thus essentially a straightforward sequence of north and south poles. Enforces the in 1 illustrated door retaining bar 1 the induction coil 11 In a given direction, for example in the opening direction of the door, the north poles and the south poles each produce comparable, but signally opposite, voltages in the induction coil 11 , By means of a rectifier, not shown, the voltage pulse can be rectified signed and the transistor 14 in 2 with the downstream adjusting device 18 be operated. It follows that by the positions of the permanent magnets 6 to 9 along the door retaining bar 1 Hold positions for the door can be specified. Will the door retaining bar 1 moving fast, the induction coil changes 11 permeating magnetic flux also strong in time and it induces a high voltage across the emitter 13 drops, so that the circuit 15 is fully released and the over the working resistor 17 actuated motor for the brake body transmits to this a strong force, so that a particularly strong movement results in a strong holding torque.

It should be noted that a temporal change of the induction coil 11 permeating magnetic flux is required. Along the length of each of the permanent magnets 6 to 9 the magnetic field is nearly homogeneous and the magnetic flux changes only slightly. A large change in the magnetic flux occurs only when one of the two poles of one of the permanent magnets 6 to 9 the induction coil 11 interspersed.

It should also be noted that there is a significant change in the magnetic flux through the induction coil 11 then does not occur when the magnetic field 12 in one through the induction coil 11 defined level, for example, if in the case of 1 illustrated arrangement, the permanent magnets 6 to 9 perpendicular to the axis of the induction coil 11 or perpendicular to the direction of the door retaining bar 1 are arranged. In this case, North Pole and South Pole occur one of the permanent magnets 6 to 9 simultaneously through the induction coil 11 and cause no change in the magnetic flux through the induction coil 11 so that the adjusting device 18 for the brake body in this case does not respond.

In the embodiment described above, the permanent magnets caused 6 to 9 one along the direction of the door retaining bar 1 approximately periodic and thus inhomogeneous magnetic field 12 ,

It it goes without saying that too a homogeneous magnetic field can be provided, for example when the door retaining bar a magnetized steel part, so that a north pole of the steel part with a first end and a south pole of the steel part approximately coincide with a second end of the door retaining bar, being along the longitudinal extent the door retaining bar a substantially constant magnetic field occurs. Will such a Door retaining bar through moves an induction coil, only then voltages are induced, if one of the two ends of the door retaining bar is the induction coil approaches. A Control device then supplies in particular for the two end stops of the door retaining bar strong holding moments.

It understands that the Magnetic field of a door retaining bar also as overlay be formed of a homogeneous and an inhomogeneous magnetic field can.

As an alternative to that described above, along the direction of the door retaining bar 1 approximately periodic magnetic field, an inhomogeneous magnetic field can also be formed in a direction steadily sloping field. Such a design is particularly preferred when the magnetic field along the direction of the door retaining bar decreases approximately linearly, so that the change of the induction coil passing through the magnetic flux becomes an approximately linear function of the speed with which the door retaining bar is moved by the induction coil or with which the door is closed or opened. Assuming that the actuator reacts at least approximately linearly, then the braking force of the brake body to the speed of the door is also approximately linear and the perceived by the operator of the door resistance moment of the door well assessable.

One along the door retaining bar at least steadily decreasing magnetic field can be formed in this way be that - starting of bar magnets of different lengths - these bar magnets are so grounded that the North poles are aligned with each other and a common North Pole form while the respective south poles arranged at different distances to the common north pole are. Such a bundle of bar magnets can then - for example molded with plastic - one Door retaining bar with inhomogeneous magnetic field, possibly even with linear in the direction of Door retaining bar be increasing magnetic field. Alternatively or in addition to this can be provided be the magnetic field as an overlay many small magnets, for example of oriented iron filings, and the area or volume density of iron filings along the direction of the door retaining bar to vary.

In the embodiment described above, there was between the door retaining bar 1 and the induction coil 11 such a large space left that the magnetic field 12 the door retaining bar 1 in every position of the door retaining bar 1 the induction coil 11 almost completely penetrated and outside the induction coil 11 only stray fields occur that are not responsible for the evaluation in the adjusting device 18 can be used. It is understood, however, that the door retaining bar 1 and the induction coil 11 can be spaced so that the magnetic field 12 the door retaining bar 1 the induction coil 11 if necessary, depending on the position of the door retaining bar 1 only partially interspersed. For example, one along the door retaining bar 1 present homogeneous magnetic field and the door retaining rod relative to the axis of the induction coil to be inclined, so that in the two end positions of the door retaining rod both poles of the magnetic field results in only a partial flux through the induction coil, but in an intermediate position, the magnetic field almost completely passes through the induction coil. In this way it is possible, even with a magnetic field which is homogeneous along the direction of the door retaining bar, to obtain a magnetic flux through the induction coil which changes continuously over the entire range of movement of the door retaining bar, the magnetic flux through the induction coil then characterizing the current position of the door holding bar. Instead of an oblique arrangement of the door retaining rod relative to the axis of the induction coil may also be provided that the magnetic field forms an angle with the direction of the door retaining rod and the door retaining rod itself is aligned with the axis of the induction coil. The magnetic field enclosing an angle with the door retaining bar may, for example, be formed such that a single bar magnet is disposed at an angle to the direction of the door retaining bar or, starting from that in FIG 1 illustrated example with four individual permanent magnets 6 to 9 - That the magnetic field is formed as a superposition of individual fields of permanent magnets, wherein adjacent permanent magnets include an increasing with the direction of the door retaining rod angle.

A changing magnetic flux passing through the induction coil along the direction of the door retaining bar can also be effected in such a way that, unlike the embodiment in FIG 1 with a fixed spatial induction coil 11 - The induction coil is moved relative to the magnetic field, possibly in synchronism with the moving door retaining bar. The induction coil may, for example, be moved perpendicular to the direction of movement of the door retaining bar, or alternatively it may rotate slightly relative to the door retaining bar, in particular the rotational movement of the induction coil may be derived from the rotation of the door itself.

Claims (6)

Door locking device comprising a door retaining bar ( 1 ), one with the door retaining bar ( 1 ) cooperating brake body, one with respect to the door retaining rod ( 1 ) has adjustable braking force, and an adjusting device ( 18 ) indicating the position of the door retaining bar ( 1 ) and the braking force of the brake body with respect to the Türhaltestange ( 1 ), characterized in that the door retaining bar ( 1 ) a defined magnetic field ( 12 ), and in that an induction coil ( 11 ) is provided which the magnetic field ( 12 ) the door retaining bar ( 1 ) detected. Door locking device according to claim 1, characterized in that the door retaining bar ( 1 ) comprises a metallic component, and that the metallic part has a permanent magnetization. Door locking device according to claim 1 or 2, characterized in that on the door retaining bar ( 1 ) a permanent magnet ( 6 . 7 . 8th . 9 ) is attached. Door locking device according to one of the Claims 1 to 3, characterized in that the brake body is guided in a holding housing, and that the induction coil ( 11 ) is attached to the holding case. Door locking device according to one of claims 1 to 4, characterized in that the induction coil ( 11 ) one through the magnetic field ( 12 ) the door retaining bar ( 1 ) induced voltage as a signal, and that the adjusting device ( 18 ) controls the brake body in response to the induced voltage. Door locking device according to claim 5, characterized in that the adjusting device ( 18 ) a transistor ( 14 ) with an emitter ( 13 ) and that the induced voltage across the emitter ( 13 ) of the transistor ( 14 ) drops.