CH718003B8 - Furniture and method for opening a movable furniture part. - Google Patents

Abstract

A piece of furniture (1) comprises a furniture body (2) and at least one movable furniture part (3), which can be moved between a closed position and an open position via a movement fitting, and a locking device which holds the movable furniture part (3) in a closed position via a Permanent magnets hold on the furniture body (2), a release device being provided by means of which the locking device can be deactivated in order to move the movable furniture part (3) in the opening direction, the release device having an electromagnet which can be switched via a control, to open the movable furniture part (3) from the closed position. This allows the movable furniture part to be released with little force. The invention further relates to a method for opening a movable furniture part.

Description

The present invention relates to a piece of furniture with a furniture body and at least one movable furniture part, which can be moved between a closed position and an open position via a movement fitting, and a locking device which holds the movable furniture part in a closed position on the furniture body via a permanent magnet , wherein a triggering device is provided, by means of which the locking device can be deactivated in order to move the movable furniture part in the opening direction, and a method for opening a movable furniture part from a closed position on a furniture body.

[0002] DE 10 2016 120 673 A1 discloses a piece of furniture in which two door leaves are connected to one another in an articulated manner and are held flush against a furniture body in a closed position. The holding device includes a permanent magnet, the holding forces of which must be overcome when the door leaves are opened. An ejection device is provided for this purpose, which can be unlocked by pressing in the door leaves. The disadvantage of the opening process for the door leaves is that the ejection device requires a comparatively strong energy storage device in order to overcome the holding forces of the permanent magnet. In addition, the trigger point of the ejection device is difficult to adjust.

It is therefore an object of the present invention to create a piece of furniture and a method for opening a movable furniture part, in which the movable furniture part can be reliably held in the closed position and which can be moved in the opening direction with little effort.

This object is achieved with a piece of furniture having the features of claim 1 and a method having the features of claim 10.

The furniture according to the invention includes, in addition to a locking device with a permanent magnet, a release device which has an electromagnet that can be switched via a control in order to open the movable furniture part from the closed position. As a result, the force of the permanent magnet of the locking device does not have to be overcome by a mechanical ejection device, but rather the holding force of the permanent magnet is reduced or canceled in whole or in part via an electromagnet in order to then move the movable furniture part in the opening direction. This enables opening with little effort, and the force required to tension any ejection device can also be lower.

A sensor is preferably provided, by means of which a control signal can be generated to the controller for switching the electromagnet. The sensor can be designed, for example, as a pressure sensor or touch sensor. The sensor can, for example, comprise a button that is triggered when the movable furniture part moves into an overpressure position in order to energize the electromagnet. The button can, for example, be arranged adjacent to the permanent magnet, so that the button or the sensor can be actuated by a movement of the permanent magnet. Other sensors can also be used as a sensor to pass on a signal to the control, e.g. a switch, a radar sensor, a camera, a light barrier, a Hall sensor, a touch sensor or another sensor.

The power supply for the electromagnet can be provided via a power grid or an energy storage device. The power supply can be via mains voltage or low voltage, for example via a lighting system attached to the furniture. An interface between the sensor and the controller can be either wired or wireless. For example, WLAN, Bluetooth, ZigBee, Z-Wave can be provided as a data interface, or data can be exchanged on certain frequencies. KNX or IP can be used as protocols, which can also communicate with other external devices, for example with devices that are smart home compatible and/or can be controlled via voice control.

In particular, a rechargeable or non-rechargeable battery can be used as an energy storage device. When using a power supply and supply from a mains voltage, bridging protection is preferably integrated for a short-term power failure.

Preferably, the electromagnet comprises a coil that can be supplied with a voltage. The electromagnet can in particular be a monostable electromagnet, in which a movable core is provided as a permanent magnet and a coil of the electromagnet surrounding the core is provided. The core of the electromagnet can optionally be biased into a starting position via a spring.

In a preferred embodiment, the movement fitting has an energy storage device, by means of which the movable furniture part is biased in the opening direction. The force of the energy accumulator on the movable furniture part is preferably smaller than the force of the permanent magnet of the locking device on the movable furniture part. The force of the permanent magnet or the energy storage device is not to be seen in absolute terms, but rather in relation to the closed position of the movable furniture part and the leverage ratios of the moving fitting. By using appropriate lever ratios, a permanent magnet with low magnetic force can also hold a furniture part, such as a door, in the closed position if the energy accumulator is arranged on the hinge side. Taking the lever forces into account, the locking forces to hold the movable furniture part in the closed position are greater than the forces on the movable furniture part in the opening direction.

The movement fitting can comprise a hinge on which a door or folding door is held as a movable furniture part. In addition to the hinge, an ejection lever can then be provided, which is pretensioned again via a force accumulator, such as a gas pressure spring, in order to apply a force to the door in the opening direction.

Alternatively, the movement fitting can comprise a pull-out guide on which a drawer is held as a movable furniture part. Furthermore, the furniture according to the invention can also have a sliding door or another movable furniture part.

In the method according to the invention for opening a movable furniture part, the movable furniture part is held in a closed position via a locking device with a permanent magnet. From this closed position, the movable furniture part can be opened by controlling a control for applying a voltage to an electromagnet of a triggering device, which then reduces or eliminates the holding force of the permanent magnet by applying a voltage in order to then move the movable furniture part in while the electromagnet is energized to move opening direction. After the movable furniture part is initially opened, the voltage on the electromagnet can then be switched off by the control. This allows the movable furniture part to be opened with little effort.

Preferably, when the electromagnet is energized, a movable core with a permanent magnet is moved away from the movable furniture part.

The control can have control logic that ensures that the electromagnet is only activated in the closing position of the movable furniture part, so that a movement of the movable furniture part in the closing direction does not lead to a triggering, even if a sensor detects the movement during a closing movement the door is detected in the closing direction.

The invention is explained in more detail below using several exemplary embodiments with reference to the accompanying drawings. Shown are: Figure 1 is a perspective view of a piece of furniture according to the invention as a cupboard; Figure 2 is a perspective view of the furniture of Figure 1 with the folding sliding door open; Figures 3A and 3B show two views of a door of the cabinet of Figure 1 in the area of a hinge and an ejection lever; Figures 4A to 4C show several views of the ejection lever of Figure 3 in a closed position; Figures 5A to 5C show several views of the ejection lever of Figure 4 in an open position; Figure 6 is a view of the connection area between two doors of the furniture of Figure 1; Figures 7A and 7B two detailed views of the furniture of Figure 1 when opened; Figure 8 shows a detailed view of the furniture body in an open position; Figures 9A to 9C show several views of the locking device on the furniture body; Figures 10A to 10D show several views of a modified locking device; Figure 11 shows a schematic view of a modified sensor next to a locking device, and Figures 12A and 12B show two views of a modified piece of furniture according to a further exemplary embodiment.

1 shows a piece of furniture which has a cabinet-shaped furniture body 2, on which two folding sliding doors are movably arranged at an opening. Each folding sliding door comprises an outer door leaf 3, which is held via hinges on a side wall of the furniture body 2, and a middle door leaf 4, which is each articulated to the outer door leaf 3 and can be moved linearly along the furniture body 2.

2 shows a folding sliding door in an opening position in which a door leaf 3 has been pivoted by the force of an opening device 5. The mechanism for articulating the two door leaves 3 and 4 can be designed as described in DE 10 2016 120 673 A1.

In Figures 3A and 3B, the outer door leaf 3 is shown in a closed position and in an open position. The door leaf 3 is held on the furniture body 2 via several hinges 6, each hinge having a side part 60 fixed to the furniture body 2 and a hinge part 61 which is pivotably mounted thereon and to which the door leaf 3 is fixed.

Furthermore, an opening device 5 is provided, which has a pivotable ejection lever 51, which is biased in the opening direction by an energy accumulator 53 in the form of a gas pressure spring.

The opening device 5 is shown in detail in Figures 4A to 4C. In addition to the ejection lever 51, which is rotatably mounted on a housing 52, each opening device includes an energy accumulator 53, which acts on the ejection lever 51 via a deflection element 55. The ejection lever 51 is guided at its end facing away from the axis of rotation in a guide rail 54, which is fixed to the outer door leaf 3. This allows the ejection lever 51 to be moved along the guide rail 54 when the door leaf 3 is opened.

[0022] In Figures 5A to 5C the opening device 5 is shown in an opening position. It can be seen that the ejection lever 51 has been pivoted by the energy accumulator 53 and is in engagement with the guide rail 54, which has been moved relative to the housing 50. To close the door leaf, the door leaf 3 can now be moved in the closing direction against the force of the energy accumulator 53 until the ejection lever 51 reaches the position shown in Figure 4 again. No locking device is arranged on the opening device 5, so that the ejection lever 51 permanently applies a force to the door leaf 3 in the opening direction.

6 shows the area of the two door leaves 3 and 4, on which a joint 7 is arranged. There is a first joint element 70 on the outer door leaf 4 and a second joint element 71 on the inner door leaf 3, which are connected to one another in an articulated manner via an axis. A metal holding element 8, which is part of a locking device, is fixed to the inner door leaf 3.

As shown in Figure 7A, the metallic holding element 8 on the outer door leaf 3 is in the closed position in contact with a permanent magnet 9, which is arranged on the furniture body 2, preferably on the top floor. In order to open the door leaves 3 and 4, the holding forces of the permanent magnet 9 must be overcome, so that according to Figure 7B there is a gap between the metallic holding element 8 and the permanent magnet 9, so that the two door leaves 3 and 4 can then be opened via the opening device 5 can be moved into an open position.

8 shows the permanent magnet 9 on the top floor, which is largely integrated into a recess in the top floor 1.

9A to 9C show a first exemplary embodiment of a locking device, which includes the permanent magnet 9, which protrudes from an end face of the top panel. The permanent magnet 9 is inserted into an opening 10 on the front side of the top panel and connected to a screw 13 which is fixed to a thread on the permanent magnet 9 or a housing on the permanent magnet 9. In the installed position, the screw 13 is arranged adjacent to a sensor 15, which detects a movement of the permanent magnet 9 and forwards a control signal to a controller. The sensor 15 is arranged on a housing 12 which is fixed in an opening 11 on the top floor.

To open the door leaf 3, the door leaves 3 and 4 are pressed slightly in the closing direction, so that the door leaf 3 is arranged in a push-over position. By pressing in the door leaf 3, the permanent magnet 9 is pushed into the furniture body, this movement also leading to a movement of the screw 13 with the screw head 14. The screw head 14 is moved to the sensor 15, which now outputs a control signal to the controller in order to energize an electromagnet arranged on the permanent magnet. The electromagnet can be supplied with power by an energy storage device or a mains voltage, and reduces or equalizes the holding forces caused by the permanent magnet 9. As a result, the permanent magnet 9 is essentially switched “powerless”, so that due to the pre-tension by the opening device 5, the door leaves can now be opened 3 and 4 can be moved in the opening direction. As soon as the metallic holding element 8 on the door leaf 3 has lifted off the permanent magnet 9, the electromagnet can be de-energized again in order to be able to hold them in a closed position again when the door leaves 3 and 4 are closed. Optionally, the permanent magnet 9 can be biased into the starting position according to FIG. 9C via a spring.

The sensor 15 is therefore designed as a button that detects a movement of the door leaf 3. Of course, other sensors can also be used, for example touch sensors, or the control can be controlled via a control element, such as a mobile phone or a remote control. The electronic circuit on the control can preferably distinguish between a shock or a draft and an indentation of the door leaf.

The schematically illustrated permanent magnet 9 with the electromagnet can be designed as a monostable electromagnet which has a movable core. By applying the supply voltage, the core can be moved relative to a housing.

A modified embodiment of a magnetic locking device is shown in FIGS. 10A to 10D. A housing 20 serves to accommodate a permanent magnet 9, which is inserted into a channel on the housing 20 and is movably held therein. A holder 21, to which the sensor 15 is attached, is fixed to the housing 20. The control and the power supply can also be provided on the housing 20. A screw 13 is screwed into the permanent magnet 9 and is arranged in the starting position adjacent to the sensor 15, as can be seen from FIGS. 10C and 10D. By pressing the permanent magnet 9 in the closing direction, a control signal is passed from the sensor 15 to the control, which then causes the electromagnet to be switched on, which acts against the force of the permanent magnet 9 in order to release the metallic holding element 8, so that the opening device 5 opens the door leaves 3 and 4 can open.

11 shows a schematic view of a locking device, in which the sensor and the permanent magnet 9 are arranged at a distance from one another. The sensor is designed as a mechanical button 30 which has a plunger 31 which is biased via a spring 32 into a position protruding from the furniture body 2. The mechanical button 30 is arranged at a distance from a permanent magnet 9, which holds the metallic holding element 8 in a closed position. By pressing in the door leaf 3, the plunger 31 can be moved against the force of the spring 32, whereby a control signal is generated which, when controlled, causes an electromagnet adjacent to the permanent magnet 9 to be switched on in order to switch it off and release the metallic holding element 8 .

12A and 12B show a modified exemplary embodiment of a piece of furniture 1', which has a furniture body 2' on which at least one drawer 3' is held movably as a movable piece of furniture via one or more pull-out guides. On the drawer 3' there is an opening device which has a plunger 5' which is biased by a spring 53' and which biases the movable furniture part in the opening direction in the closed position (Figure 12B). In order to hold the drawer 3' in the closed position, a permanent magnet 9' is arranged on a side wall of the furniture body 2', which holds a metallic holding element 8' on a front panel of the drawer 3'. If the user wants to open the drawer 3', the drawer 3' can be moved to the furniture body 2' into a push-over position in order to energize an electromagnet which is arranged on the permanent magnet 9'. This releases the metal holding element 8' and the drawer 3' can be moved in the opening direction by the force of the springs 53'.

The movable furniture part can also be designed as a sliding door or flap instead of as a pivoting door leaf 3 or a movable drawer 3 '. In addition, the opening devices can be designed differently, depending on what kind of movable furniture part is to be ejected from the furniture.

Reference symbol list

1 top shelf 1' furniture 2, 2' furniture body 3 door leaf 3' drawer 4 door leaf 5 opening device 5' plunger 6 hinge 7 joint 8, 8' holding element 9, 9' permanent magnet 10 opening 11 opening 12 housing 13 screw 14 screw head 15 Sensor 20 Housing 21 Holder 30 Button 31 Plunger 32 Spring 50 Housing 51 Ejector lever 52 Housing 53 Energy storage 53' Spring 54 Guide rail 55 Deflection element 60 Side part 61 Hinge part 70 Joint element 71 Joint element

Claims (11)

1. Furniture (1, 1') with a furniture body (2, 2') and at least one movable furniture part (3, 3'), which can be moved between a closed position and an open position via a movement fitting, and a locking device which holds the movable furniture part (3, 3') in a closed position via a permanent magnet (9, 9') on the furniture body (2, 2'), a triggering device being provided by means of which the locking device can be deactivated in order to hold the movable furniture part (3, 3') to move in the opening direction, characterized in that the triggering device has an electromagnet which can be switched via a control in order to reduce or cancel the holding force of the permanent magnet, so that the movable furniture part (3, 3') comes out of the Closing position can be opened. 2. Furniture according to claim 1, characterized in that a sensor (15) is provided, by means of which a control signal can be generated to the controller for switching the electromagnet. 3. Furniture according to claim 2, characterized in that the sensor (15) is designed as a pressure sensor or touch sensor. 4. Furniture according to one of the preceding claims, characterized in that the movement fitting or an additional fitting has a force accumulator (53, 53'), by means of which the movable furniture part (3, 3') is biased in the opening direction. 5. Furniture according to claim 4, characterized in that the force of the energy storage device (53, 53') on the movable furniture part (3, 3') in the closed position is smaller than the force of the permanent magnet (9, 9') of the locking device on it movable furniture part (3, 3 '). 6. Furniture according to one of the preceding claims, characterized in that the locking device comprises a monostable electromagnet with a movable core as a permanent magnet and a coil surrounding the core as an electromagnet. 7. Furniture according to claim 6, characterized in that the movable core is biased into a starting position via a spring. 8. Furniture according to one of the preceding claims, characterized in that the movement fitting comprises a hinge (6) on which a door (3) or a folding door is held as a movable furniture part (3). 9. Furniture according to one of claims 1 to 7, characterized in that the movement fitting comprises a pull-out guide on which a drawer is held as a movable furniture part (3 '). 10. Method for opening a movable furniture part (3, 3') from a closed position on a furniture body (2, 2'), the movable furniture part (3, 3') being in the closed position via a locking device with a permanent magnet (9, 9'). ) is held in the closed position with the following steps: - Activating a controller for applying a voltage to an electromagnet of a triggering device; - Generating a force on the movable furniture part (3, 3') in the opening direction by a force accumulator (53, 53') while the electromagnet is energized; - Moving the movable furniture part (3, 3 ') in the opening direction, and – Switching off the voltage on the electromagnet by the control. 11. The method according to claim 10, characterized in that when the electromagnet is energized, a movable core with a permanent magnet is moved away from the movable furniture part (3, 3 ').