SK11252000A3 - Pressure-sensitive device for blocking electrically actuated closing devices - Google Patents

Abstract

The device has a flexible hollow profile (1) of rubber or similar with two parts (2) in its interior, likewise of rubber material but electrically conductive and containing embedded electric conductors (3). The entire arrangement is connected to an external electrical supply. A block (7) of rubber or of a thermoplastic material of low electrical conductivity is formed on one end of the profile, via which the electric circuit is connected with a high impedance for the electric current so that a very low current flows continuously through the circuit to enable the functionality of the device to be checked.

Description

Pressure sensitive device for blocking electrically driven movable shut-off devices

Technical field

The present invention relates to an apparatus for stopping the movement of a movable member consisting of an electrically driven shutter when an object is brought into the path of the movable member or shutter and causes a force applied to the device to identify the pressure applied thereto. In addition, the device allows its self-test or functional test.

It is an object of the present invention to provide an elastomeric profile device with two conductive elements separated from each other in a rest position which, as a resultant device, provides a flexible profile which can be used on automobile windows with electric control panels as well as elevator doors in ^: households and industry, garage doors, as well as any other practical case where it may be necessary to lock the movable element at any given time at any pressure applied to the equipment, this pressure being identified to prevent head pinch, or the hand of a person, for example, while closing a vehicle window. That is, said device is itself a safety element based on the current flow through the profile, in a self-closing device, with a bistable current value lower than or greater than the maximum threshold, which in addition includes a self-test means for examination. the functionality of the device at any point in time.

BACKGROUND OF THE INVENTION

There are known devices or flexible profiles to be placed! for the appropriate guiding of a car window or for other applications, the profile detecting the pressure not exerted by the window itself or the automatically operated movable device and blocking its function to prevent accidents of any kind that may occur when a hand is laid or a head on the edge of the window, and this is in the automatic closing phase, wherein the identification of the pressure by means of a profile placed on the window guide which acts on the profile by displacement caused by the pane or window to the hand or head leads to blocking or interruption of the device.

In this context, European patent no. No. 0638701, which relates to the protection by locking of motorized shut-off devices and preferably is applicable to electrically operated windows and sliding roofs of cars, the protective effect being based on a hollow profile consisting of an elastomer or plastic, said profile having two conductive areas which they are separated from each other by insulating or non-conductive elements and are provided with opposing arches, so that, when the profile is mounted in the wiring of, for example, a vehicle window, pressure can be applied to the profile the function could be blocked to prevent an accident or pinch that could occur without the block.

According to the description of this European patent, said device or protective device for locking has two major disadvantages, one of which is that it is not possible to test the functionality of the device and therefore it is not known at any time whether this will occur at the occurrence of the above events. effective or not.

SUMMARY OF THE INVENTION

The proposed device for solving the above problems has been designed such that it is also based on a flexible profile of elastomer or similar material and is equipped with pressure-sensitive means to block the function of the drive system of the closure device or movable member. cause an accident and that it exhibits the following two essential features of novelty:

Installation of a self-test or functional test device comprising a rubber or thermoplastic block having a high electrical resistance, i.e. a low conductivity, and a rubber block being pressed at one end of the flexible profile and coupled thereto at said end , with the peculiarity that the rubber block exhibits a resistance that is of the order of a hundred to a thousand times greater than that of the conductive rubber material as part of its own profile and that the rubber block closes the electric current circuit and allows very small current flow of several milliamperes whereby it can be demonstrated that the system is functional at any time, and without this rubber block having the above characteristics, zero current can also be conditioned by an unactivated or interrupted current circuit.

2. The connection between the profile and the respective external electrical installation takes place via a two-pole connector by plugging the poles of the connector into the conductive rubber parts of the profile, and due to the electrical conductivity of these parts and the current circuit is closed over the rubber of the conductive portions of the profile.

For ease of insertion, the connector poles may be skewed, but it is also possible to provide a pair of holes in the conductive portions of the profiles into which the ends of the connector poles are inserted and held under pressure, these holes being formed directly during extrusion of the overall profile.

The connector is slid on the side opposite the end on which the above rubber block has been formed, for example in the case of a vehicle window.

Both features of the device according to the invention therefore give substantial advantages over other conventional devices planned for the same purpose, since the assignment of the self-test facility at any given time allows proof that the device is functioning properly when necessary, whereas, in conventional systems, current flows through pressure on the profile and no current flows at rest, which may also be due to a failure or interruption of the current circuit.

A further improvement and object of the invention consists in an intermediate layer of an insulating bundle, preferably of non-conductive rubber, which prevents both conductive rubber parts from touching in an undesirable way when bending and adapting the profile to the clamping bore. This non-conductive rubber is preferably positioned in the axis of symmetry of the profile so that its shape and dimensions do not prevent the two conductive rubber layers from touching each other under pressure at the eccentric point of the profile.

It is further proposed that, when sufficient pressure is applied to the profile area corresponding to the insulating bundle, it is laterally displaced within the profile to allow contact between the conductive rubber parts, i.e. that the bundle behaves in some way as a switch lever.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to complete the description and to better understand the features of the invention according to a preferred practical embodiment, the description includes as an integral part of the set of drawings, in which, in an explanatory and non-limiting manner, they show:

Figure 1 - a perspective cross-sectional view of a profile represented by the device according to the invention, supplemented by a rubber block designed at one end, as well as the respective connector in an explosive representation in its poles position for insertion into both openings located in the conductive parts of the profile as part of the device .

Figure 2 - practical use of the device shown in the preceding figure for guiding a car window; it is possible to distinguish the profile itself and the rubber block placed at one end, which constitutes an element for the self-test and to check the functionality of the device at any time.

Figures 3 and 4 show a detail of a further improvement object of the invention, which consists in associating a non-conductive rubber part which separates the conductive rubber parts from each other and ensures a constant distance between them when the profile is bent.

DETAILED DESCRIPTION OF THE INVENTION

As can be seen from the figures, the device according to the invention consists in a conventional manner of a profile 6 of rubber or the like material which is hollow and has a pair of elements or parts 2 in this case conductive rubber extending in the longitudinal direction. The portions, as can be seen in Figure 1, have some spacing between them, and in these elements or portions 2 are inserted conductive wires 3, in the proximity of which have a pair of holes for insertion of the terminals or terminals 5 of the connector 6 under pressure. the device, in this case the profile device, and the poles 5 are perfectly connected to the profile device by means of a pressurized connection to the apertures 4, but it is also possible for these holes 6 to be absent in the conductive elements or parts 2 and Figure 1, bevelled at their ends and can be inserted into elements or parts 2.

One of the ends of said profile 6 is each completed by a molded rubber block 7, while at the other end the corresponding connector 6 for electrical supply is connected.

Conductors 3 exhibit! They can be of good conductivity and can be made of a simple metal wire, which has to fulfill only one condition, that its dimensions correspond to the dimensioning of the profile A and that the surface is conductive.

The conductive parts 2, as part of the profile A themselves, must have properties such that their electrical resistance is lower than the value determined in this application, while only a few milliamperes flow through a thin layer in the vertical direction.

The rubber block 7 must also be of a conductive material and exhibit an electrical resistance which is 100 times and a thousand times greater than the resistance of the entire device, i.e. the conductive parts 2, which rubber block T fulfills the self-test function by allowing current flow of several milliamperes. That is, the electrical current circuit is closed by said rubber block 7 and, due to its very high resistance, a very small current flows in the current circuit, which allows proof that the system, in this case the device, is functional at any time.

As mentioned above, the conductive portions 2 of the profile A, ^and thus the conductors 3 inserted into these parts, must be separated from each other until there is no pressure or no pressure is applied to the profile A, or, equally, the device is in a rest position.

With regard to the connection to the external electrical installation by the two-pole connector 6, it has already been said that this is produced via the poles 5 of the connector 6 by plunging into the conductive elements or portions 2 of the profile 1 or pushed into the openings 4 located in these conductive portions 2. the poles 5 of the connector 6 are still close to the intermediate conductors 3 inside the conductive part 2.

In the case where the device is used on the vehicle window as shown in Figure 1, the profile 1 is placed along the window guide 3 of the window in which the panel 9 closes, with the particularity that the connector 6 is located at the bottom and the rubber a block T in the upper part, in particular on the vehicle door cross beam 10, the embodiment being such that when a person puts his or her hands or head on the upper edge of the window pane 9 and the closing system or the window lowering is actuated or the head on the profile 1 caused by the displacement of the sheet 9, the conductive parts 2 of the profile 1 touch and thereby block the function of the installation or the device, so that the movement of the sheet stops and prevents pinching or an accident that could occur without said sensitive device. pressure.

Finally, FIGS. 3 and 4 show in detail the improvement which is utilized in the present invention in that an insulating rubber bundle 11 is mounted, preferably located in the axis of symmetry and providing a constant distance between the two conductive rubber parts 2 when the profile bends to adaptation to the clamping holes, furthermore its shape and dimensions do not interfere in any way with the contact between the conductive parts 2 when the profile is exerted by pressure off the center of the conductive rubber parts, as can be seen in Figure 4.

As can be seen in Figure 1, due to the shape and arrangement of the insulating bundle 11, this radial force is exerted when the profile 1 is subjected to pressure in the region of the bundle 11, the resultant generating a laterally directed force on the bundle 11 and shifting it laterally, between conductive rubber parts 2.

Claims (5)

PATENT CLAIMS 1. Pressure sensitive device for locking electrically powered movable closing devices, usable on vehicle windows, lift doors, shutters and other practical cases in which a movable, automatically powered, electrically powered closing element is used to block the function of the movable closing element when: this pressure is applied to the object, which may be the hand or head of a person between said movable closure element and the actual device located on the guide of the respective closure element, consisting of a flexible hollow profile (1) of rubber or the like in which there are two parts (2), also made of rubber material, but which is electrically conductive, in which both electric conductors (3) are inserted, the whole device being connected to an external electric power supply, characterized in that on one At the end of the profile (1), a block (7) of rubber or a thermoplastic electrically low conductive material is pressed, which closes the electric current circuit with a high resistance to the electric current, so that a very small current flows through the current circuit. Pressure sensitive device for blocking electrically driven movable closing devices according to claim 1, characterized in that the device has an insulating bundle (11), preferably of a non-conductive rubber, which provides a constant, as a separating element between the two conductive rubber parts (2). the distance between the two conductive rubber portions (2) when the profile is bent to accommodate the clamping holes, but this bundle does not prevent contact between the conductive portions when the pressure acts on a point other than that at which the insulating bundle (11) is located. A pressure-sensitive device for blocking electrically-driven movable shut-off devices according to the preceding claims, characterized in that the insulating bundle (11) has the possibility of lateral movement within the profile (1) so that when sufficient pressure is applied to the profile region (1). 1) corresponding to the position of the bundle (11J) causing lateral movement of the bundle to allow contact between the conductive rubber parts (2). Pressure-sensitive device for blocking electrically driven movable closing devices according to claim 1 and 2, characterized in that the electrical connection of the electrical conductors (3) to the outside by means of the poles (5) of the connector (6) is plugged into the rubber of conductive parts or elements. 2) or by firmly placing said poles (5) in openings placed for this purpose in said conductive parts or elements (2), so that electric current flows from the electrical conductors (3) through the rubber of the parts (2) to the poles (5) . 5. The pressure sensitive device for blocking electrically ^J-powered mobile closure apparatus of the previous claims, characterized in that the rubber block (7) is press-fitted on the profile (1).