Switch cabinet with switch cabinet door having door status sensor

Abstract

The present invention relates to a switch cabinet (1) with a switch cabinet door (2), which closes the switch cabinet (1) and has a door lock (4) that can be activated by a door handle (3), wherein the switch cabinet door (2) has a door state sensor (6), which has a magnetic field sensor (5) and is designed to distinguish between an open state of the switch cabinet door (2) and a closed state of the switch cabinet door (2) by detected magnetic field changes, and is characterized in that at least the magnetic field sensor (5) of the door state sensor (6) is accommodated inside the door handle (3) in a magnetically conductive area (9) of the door handle (3) relative to the periphery of the switch cabinet (1).

Description

Technical Field

[0001] The invention is based on a switch cabinet with a switch cabinet door, which closes the switch cabinet and has a door lock that can be activated by a door handle, wherein the switch cabinet door has a door state sensor, which has a magnetic field sensor and is designed to distinguish between an open state of the switch cabinet door and a closed state of the switch cabinet door by a detected magnetic field change. For example, DE 10 2013 220 176 A1 and DE 10 2013 205 368 A1 describe monitoring the open state of a door or window. A similar sensor device is also known from US 2003 / 0071739 A1. Background Art

[0002] The transmission of the door state sensors known from the prior art to the switch cabinet cannot be realized directly using magnetic field sensors. This is due in particular to two switch cabinet-specific factors, one of which is that it is undesirable to additionally attach the device to the outer housing of the switch cabinet, in particular the switch cabinet door, for aesthetic, safety or functional reasons. Another is that the switch cabinet is usually made completely of steel, so that when the magnetic field sensor is attached to the switch cabinet housing, in particular in the switch cabinet housing, it is not possible to reliably determine the measured magnetic field changes of the monitored earth magnetic field. Summary of the invention

[0003] It is therefore the object of the present invention to further develop a switch cabinet of the type mentioned above in such a way that it allows the open state of a switch cabinet door to be monitored by means of a door state sensor having a magnetic field sensor.

[0004] This object is achieved by a switch cabinet having the features of claim 1. The dependent claims relate to advantageous embodiments of the invention.

[0005] Accordingly, it is provided that at least the magnetic field sensor of the door state sensor is accommodated within the door handle of the switch cabinet in a region of the door handle which is magnetically conductive relative to the outer periphery of the switch cabinet.

[0006] By placing the door state sensor inside the door handle, it is possible to place the door state sensor on the switch cabinet housing so that it cannot be seen from the outside. At the same time, it is coupled to the earth's magnetic field through the magnetic conductive area of ​​the door handle so that the magnetic field change can be detected when the switch cabinet door pivots from a first open state to a second open state, for example, from a closed position to an open position.

[0007] The door handle can, for example, have a ferromagnetic base, via which the door handle is placed on the outside of the switch cabinet door, for example, fixed to the outside of the switch cabinet door. The door handle can also have a cover plate, with the door state sensor being arranged between the cover plate and the base. In this case, the cover plate can have a magnetically conductive area and / or consist completely of a magnetically conductive material.

[0008] The door handle may have a door handle body mainly composed of ferromagnetic material, in which a door state sensor having a magnetic field sensor is accommodated. The door handle body may have a receiving portion, which is closed relative to the periphery of the door handle by a magnetically conductive cover plate, in which at least the magnetic field sensor of the door state sensor or the entire door state sensor is accommodated.

[0009] The door handle can have a ferromagnetic pivot lever that can be pivoted relative to the switch cabinet door, which in the open position pivoted away from the switch cabinet door exposes the receptacle of the door handle and when the pivot lever is in the closed position flipped onto the switch cabinet door, covers the receptacle in which at least the magnetic field sensor of the door state sensor is accommodated.

[0010] The door handle may be a radio handle for contactless locking and / or unlocking of the door handle. To this end, the door handle may have a radio module arranged on a circuit board, which is arranged inside the door handle. The door state sensor may be arranged on the same circuit board as the radio module.

[0011] The door state sensor may also have a uniaxial or multi-axial, for example a triaxial, acceleration sensor, which is designed to switch the magnetic field sensor from a standby mode in which the magnetic field sensor is deactivated to an operating mode in which the magnetic field sensor is activated when acceleration is detected, so as to detect magnetic field changes.

[0012] The magnetic field sensor can have a reed switch or be designed as a reed switch. The switch cabinet can have a permanent magnet or a magnetizable sensor counterpart at a cabinet opening that can be closed by a switch cabinet door. In the open position of the switch cabinet door, the magnetic field sensor can be located away from the permanent magnet or the magnetizable sensor counterpart and in the closed position of the switch cabinet door, close to the permanent magnet or the magnetizable sensor counterpart.

[0013] The magnetic field sensor can have a Hall sensor, and the switch cabinet can have a magnetic or magnetizable sensor counterpart, for example a switch cabinet frame, at a cabinet opening that can be closed by a switch cabinet door.

[0014] The switch cabinet may have a light reflector at the cabinet opening that can be closed by the switch cabinet door, and the door state sensor may be a light-sensitive sensor, such as a photoelectric component, which converts light into electrical energy when there is incident light. Alternatively, an infrared light barrier may be used.

[0015] As far as the switch cabinet door introduced in the above description is concerned, it does not necessarily have to be a door in the conventional sense which is hinged on one side to the switch cabinet frame, even though this represents a preferred embodiment of the invention. Rather, the invention can also be transferred to embodiments in which, for example, another flat part of the switch cabinet is equipped with a door state sensor and a corresponding magnetic field sensor in order to determine, for example, whether any flat part, for example a mounted side wall of the switch cabinet, has been moved, for which, for example, the side wall must be removed from the switch cabinet frame, so that, for example, if a removed side wall is detected, a deenergizing circuit of a switchgear accommodated in the switch cabinet can be triggered. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Further details of the present invention will be explained with reference to the following drawings.

[0017] Figure 1 An exemplary embodiment of a door handle is shown;

[0018] Figure 2 Another exemplary embodiment of a door handle is shown;

[0019] Figure 3 A schematic diagram showing a switch cabinet according to an embodiment of the present invention; and

[0020] Figure 4 Shown in accordance with Figure 3 Detail of a horizontal cross section in the door handle area of ​​a switch cabinet. DETAILED DESCRIPTION

[0021] Figure 1 The door handle 3 shown in the figure is designed as a so-called door lock cover and has a cover plate 8 that can be mounted on a base 7. A circuit board 13 is arranged on the base 7, and when the cover plate 8 is mounted on the base 7, the circuit board is completely covered by the cover plate 8. The main electrical functions of the door handle 3 are implemented on the circuit board 13, in particular, in addition to the radio module 14 and the uniaxial or multiaxial acceleration sensor 15, there is also a door state sensor 6. All the functional components mentioned are implemented on the same circuit board 13 and can therefore be arranged in the handle 3 in a space-saving manner.

[0022] The door handle 3 is made of a plastic material which is magnetically permeable and thus has a magnetic permeability in the range of 1. In this way, the door state sensor 6 can be installed in the interior of the door handle 3 in a space-saving manner on the one hand and, on the other hand, due to the cover plate 8 having or forming the permeable area 9, can measure changes in the earth's magnetic field when the door is pivoted from a first position to a second position about a vertical axis, wherein the door state sensor 6 traverses a circular path with its magnetic field sensor 5. In principle, it is not necessary to measure the earth's magnetic field, for example the field strength, absolutely for the door state assessment in the manner according to the invention. For example, when the door handle 3 is first mounted, it can be provided that the door state sensor 6 is calibrated to the closed position of the switch cabinet door 2, so that any deviation of the measured earth's magnetic field exceeding a certain minimum deviation can be evaluated as a door state change and thus the at least partial open position of the switch cabinet door 2 can be evaluated.

[0023] Figure 2 Another embodiment of the door handle 3 is shown. It has a pivot rod 12, which can be pivoted in a plane extending perpendicular to the plane of the switch cabinet door. The door handle 3 can have a main body 10, which, for example, in its main component, can be made of a ferromagnetic material such as steel or iron, as is usually the case in ordinary door handles. In this embodiment, the door state sensor 6 (not visible) is also accommodated in the door handle 3, in particular in the lower part of the main body 10. In order to avoid magnetic shielding of the sensor 6 inside the main body 10, the main body 10 has a magnetically conductive area 9 at its lower end. This area can be designed, for example, as a cover plate 8 made of plastic, such as polycarbonate, and has the same color as the main body 10 in other aspects, so that providing a permeable area 9 in the lower part of the main body 10 does not lead to any loss in aesthetics and functionality.

[0024] Alternatively, according to Figure 2 In an embodiment, it can be provided that the door state sensor 6 is accommodated in a receiving portion 11 of the door handle 3, and when the pivot rod 12 is arranged in an open position pivoted away from the switch cabinet door 2, the receiving portion is exposed, and when the pivot rod 12 is in a closed position flipped onto the control cabinet door 2, the receiving portion 11 is covered by the pivot rod 12, which is also ferromagnetic, for example. Figure 2 Shown in.

[0025] Figure 3 The schematic diagram of a switch cabinet 1 is shown, which has a switch cabinet frame 18, on which a plurality of flat parts are arranged, which are partially designed as switch cabinet doors 2 and each have a door handle 3. In addition, the switch cabinet 1 has additional flat parts that are not designed as doors, such as side walls or a roof.

[0026] exist Figure 4, a detailed view of a horizontal cross section in the region of one of the two door handles 3 is shown. Accordingly, the door handle 3 is mounted on the outside of the switch cabinet door 2, wherein the door state sensor 6 extends through the door 2 at least with its magnetic field sensor 5 or the reed switch 16 in order to determine the relative proximity of the door state sensor 6 to a sensor counterpart 17 on the inside of the switch cabinet 1. In particular, the sensor counterpart 17 is mounted on the profile side of the switch cabinet frame 18, which faces the switch cabinet opening closed by the door part 2 and is arranged offset to the rear relative to the switch cabinet opening. In addition, a tubular door frame 19 is arranged on the inside of the door.

[0027] A mechanism of the door lock 4, which also extends on the inside of the door, such as a vertically adjustable push rod lock, is arranged above the door handle 3. The door 2 is sealed on the inside in its closed position relative to the frame 18 by means of a sealing element 20. The use of a sensor counterpart 17 can be advantageous, in particular, when the magnetic field sensor 5 of the door state sensor 6 is designed as a reed contact or has such a reed contact.

[0028] However, the invention is not limited to embodiments in which the door opening state is determined by detecting the sensor counterpart 17. In particular, the invention should also include embodiments in which the door state is determined by means of a door state sensor, in particular by means of a magnetic field sensor 5 of the door state sensor 6, taking into account the earth's magnetic field as a reference, and the determination of the door state sensor is primarily based on detecting changes in the measured earth's magnetic field. It is understood that the last-mentioned embodiment involving the earth's magnetic field is only advantageous in the case of stationary switch cabinets and therefore cannot be used in particular in applications in vehicles such as trains or ships.

[0029] The features of the invention disclosed in the above description, the drawings and the claims are essential for the implementation of the invention, both individually and in any combination.

[0030] Reference numerals list

[0031] 1Switchgear

[0032] 2 switch cabinet door

[0033] 3. Door handles

[0034] 4. Door locks

[0035] 5Magnetic field sensor

[0036] 6 door status sensors

[0037] 7 Base

[0038] 8 Cover

[0039] 9Magnetic conductive area

[0040] 10Door handle body

[0041] 11 Accommodation

[0042] 12 Swing rod

[0043] 13 Circuit Board

[0044] 14 radio modules

[0045] 15 Acceleration sensor

[0046] 16 Reed Switch

[0047] 17 Sensor counterparts

[0048] 18 switch cabinet frame

[0049] 19 Tubular door frame

[0050] 20 Sealing parts

Claims

1. A switch cabinet (1) with a switch cabinet door (2), which closes the switch cabinet (1) and has a door lock (4) which can be activated by a door handle (3), wherein: The switch cabinet door (2) has a door state sensor (6), which has a magnetic field sensor (5) and is designed to distinguish between an open state of the switch cabinet door (2) and a closed state of the switch cabinet door (2) by detecting changes in the earth's magnetic field, wherein at least the magnetic field sensor (5) of the door state sensor (6) is accommodated inside the door handle (3) in a magnetically conductive area (9) of the door handle (3) relative to the periphery of the switch cabinet (1), and is coupled to the earth's magnetic field through the magnetically conductive area (9), characterized in that the door handle (3) has a ferromagnetic base (7) and a cover plate (8), the door handle (3) is placed on the outside of the switch cabinet door (2) through the base, and the door state sensor (6) is arranged between the cover plate and the base (7), wherein the cover plate (8) has the magnetically conductive area (9) and / or is completely composed of a magnetically conductive material.

2. The switch cabinet (1) according to claim 1, wherein: The door handle (3) has a door handle body (10) made of ferromagnetic material, and the door state sensor (6) having the magnetic field sensor (5) is accommodated in the door handle body, wherein the door handle body (10) has a accommodating portion (11), which is closed relative to the periphery of the door handle (3) by a magnetically conductive cover plate (8), and at least the magnetic field sensor (5) of the door state sensor (6) is accommodated in the accommodating portion.

3. The switch cabinet (1) according to claim 2, wherein: The door handle (3) has a ferromagnetic pivot rod (12) which can be pivoted relative to the switch cabinet door (2), and in an open position pivoted away from the switch cabinet door (2), the pivot rod exposes a receiving portion (11) of the door handle (3), and when the pivot rod (12) is in a closed position flipped onto the switch cabinet door (2), the receiving portion (11) is covered, in which at least a magnetic field sensor (5) of the door state sensor (6) is received.

4. The switch cabinet (1) according to any one of the preceding claims, wherein: The door handle (3) is a radio handle used for contactless locking and / or unlocking of the door handle (3). To this end, the door handle (3) has a radio module (14) arranged on a circuit board (13), which is arranged inside the door handle (3), wherein the door state sensor (6) is arranged on the same circuit board (13) as the radio module (14).

5. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The door state sensor (6) also has a uniaxial or multiaxial acceleration sensor (15) which is designed to switch the magnetic field sensor (5) from a deactivated standby mode to an activated mode when acceleration is detected, so as to detect magnetic field changes.

6. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The magnetic field sensor (5) has a reed switch (16).

7. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The switch cabinet (1) has a permanent magnet or a magnetizable sensor counterpart (17) at a cabinet opening that can be closed by the switch cabinet door (2), wherein in the open position of the switch cabinet door (2), the magnetic field sensor (5) is away from the permanent magnet or the magnetizable sensor counterpart (17), and in the closed position of the switch cabinet door (2), it is close to the permanent magnet or the magnetizable sensor counterpart (17).

8. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The magnetic field sensor (5) is a Hall sensor and the switch cabinet (1) has a magnetic or magnetizable sensor counterpart (17) at a cabinet opening which can be closed by the switch cabinet door (2).

9. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The switch cabinet (1) has a switch cabinet frame (18).

10. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The switch cabinet (1) has a light reflector at a cabinet opening that can be closed by the switch cabinet door (2), and the door state sensor (6) is a photosensitive sensor that converts light into electrical energy when there is incident light.

11. The switch cabinet (1) according to any one of claims 1 to 3, wherein: The door state sensor (6) is a photoelectric component.

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