EP3532689B1 - Opening and closing system having an ejection apparatus for an item of furniture, and operating method for an opening and closing system - Google Patents

Description

The invention relates to an opening and closing system for furniture, which has at least one movable furniture part and a movement fitting. The opening and closing system comprises an ejection device with a tensionable mechanical energy store and a tensioning device for charging the mechanical energy store, the tensioning device being supplied with energy via an electrical energy store. The ejection device is set up to move the movable furniture part into a partially open position when the mechanical energy store is unlocked. The invention further relates to an operating method for such an opening and closing system.

In furniture, in particular with pivotably hinged doors as movable furniture parts, so-called push-to-open devices are known with which the door can also be made without a handle or a recessed handle mounted on the door. To open, the door is pushed further out of its closed rest position in the direction of the furniture body, whereupon an ejection element, for example a plunger, extends and the door is pushed open at least to such an extent that it can be gripped behind for opening. To close the door, it is closed against the force of the ejection element, as a result of which the energy store of the ejection device is tensioned again. As a rule, a locking mechanism with a heart curve is provided as the control curve, which holds the ejection element in the tensioned position until the door is pressed against the furniture body again.

The publication WO 2008/135315 A2 describes an electromotive ejection device which is further developed in one embodiment so that it can also retract the furniture part. It is disadvantageous that, due to the purely electric motor drive, the ejection device must have an appropriately dimensioned electric motor which is associated with a larger installation space.

From the publication AT 413 933 B an ejection device for furniture is known, in which a plunger serves as an ejection element spring-loaded for pushing open the movable furniture part. In addition, an electric drive unit is provided which, after the movable furniture part has been pushed open, tensions the energy store of the ejection device again and thus the ejection element drives in. This enables the furniture part, for example the furniture door, to be closed more conveniently for the user, since the effort required to tension the energy store of the ejection device is eliminated. With such an arrangement, the ejector can also be combined with a self-retracting device, by means of which the closing process of the furniture part is made even more comfortable and a safe taking of the closed position is achieved.

To control the drive unit is according to the document AT 413 933 B a sensor is provided which registers a movement of the movable furniture part by the user. According to the document, the energy storage device of the ejection device is locked in the loaded position by the drive unit. After the user detects the movement of the furniture part, the drive unit first releases the lock, so that the energy store relaxes and the furniture part moves and pulls the ejection element back into the retracted position while the energy store is being charged.

The publication WO 2010/009780 A1 shows a comparable system, wherein in this system the ejection device is arranged on a pull-out guide. The ejection device reloads the energy store immediately after the ejection.

A disadvantage of the previously known systems is that a closing process must always be carried out manually. In particular if the ejection device is triggered unintentionally by the user, there is a risk that the door remains in the partially open position until it is closed again by the user. Particularly in the case of a household appliance such as a refrigerator or a freezer, which is considered to be furniture in the context of the application, it would be desirable if the door, as a moving piece of furniture, would automatically move back into the closed position after the ejection mechanism was triggered inadvertently.

It is therefore an object of the present invention to provide an opening and closing system of the type mentioned at the outset and an operating method for such an opening and closing system in which the movable furniture part is automatically moved back into the closed position after an unintentional triggering of the ejection device .

This object is achieved by an opening and closing system or an operating method with the features of the respective independent claim. Advantageous refinements and developments are specified in the dependent claims.

An opening and closing system according to the invention of the type mentioned at the outset is characterized in that the movement fitting has a retraction device and a damping device which is provided to dampen the movable furniture part from a partially open position, which is within a predetermined effective range, into a closed position to move. The partially opened position of the movable furniture part achieved by the ejection device lies within the predetermined effective range of the feed device.

In this way it is achieved that when the ejection element of the ejection device is pulled in, the movable furniture part, e.g. a door or a push element, is moved back into the closed position by the feed device. When the ejection element is withdrawn, automatic closing is thus achieved even after the ejection device has been triggered unintentionally. The forces acting on the furniture part of the energy store of the ejection device and the pull-in device are selected such that the ejection device can open the furniture part against the force of the pull-in device and - as long as the ejection element is not pulled back by the tensioning device - can also keep it open. As mentioned at the beginning, household appliances such as e.g. To view refrigerators or freezers as furniture in which the opening and closing system according to the invention can be used.

In an advantageous embodiment of the opening and closing system, the ejection device has a linearly displaceable plunger as an ejection element for the movable furniture part. A spring is preferably provided as a mechanical energy store. A heart curve control is further preferably provided in order to lock the plunger in a retracted rest position when the spring is tensioned and to release it beyond the rest position after mechanical pressing. In this way, the ejection device can be operated completely mechanically. The automatic tensioning of the spring by the tensioning device is a comfort function, but is not a prerequisite for the push-to-open functionality. The opening and closing system thus remains in the event of a malfunction of the electrical components of the system or usable with a discharged energy storage. Batteries, for example disposable batteries or rechargeable batteries, can preferably be used as energy stores. The energy storage formed by the batteries provides a nominal voltage of 0.8 V (volts) to 24 V.

In a further advantageous embodiment of the opening and closing system, the tensioning device has a sensor that detects a position of the plunger. The sensor can be used to activate the clamping device. In this case, a timer is preferably started, which initially runs without further actions for an adjustable or fixed predetermined time. During this time, the user is given the opportunity to use the ejector reach behind the movable furniture part and open it completely. The time can range from a few seconds to a few tens of seconds. After this time, the clamping device is activated.

Alternatively, the ejection device can have a mechanical slide, which protrudes pretensioned over a housing of the ejection device and bears against the movable furniture part in a closed position, wherein the ejection device has a sensor which detects a position of the slide. The mechanical slide is preferably a sleeve which is arranged concentrically around the tappet.

In both cases, the sensor can be a button whose contacts e.g. are open when the movable furniture part is in the closed position.

In a further advantageous embodiment of the opening and closing system, the tensioning device of the ejection device has an electric motor, preferably a DC low-voltage motor, with a downstream gear and a spindle, a spindle nut arranged on the spindle engaging in a driver of the tappet around the latter to move to the rest position. Such a construction is compact and e.g. when using helical gears in the gearbox quiet in operation.

In a further advantageous embodiment, the tensioning device only carries out the tensioning process when the voltage of the electrical energy store is above a defined undervoltage limit of at least 3 V nominal voltage or a higher value. This ensures that the spindle nut can always be moved into the rest position. The undervoltage limit is checked before each clamping operation. If the undervoltage limit is undershot, no further tensioning process is triggered. From this point in time, the battery can be replaced, and the ejection device can continue to be operated. Only the clamping process then has to be carried out manually by one person.

In a further advantageous embodiment, the tensioning device only carries out the tensioning process when the voltage of the electrical energy store is below a defined overvoltage limit of at most 24 V or a low value. This measure protects the system against overvoltage.

The undervoltage limit and the overvoltage limit are advantageously selected such that a difference between the two limit values is at least 1.8 V.

In a further embodiment, the ejection device has a circuit board with a control device, which has a microcontroller and switching elements controlled thereby in an H-bridge arrangement for controlling the motor.

The switching elements of the H-bridge arrangement are preferably MOSFETs (metal-oxide semiconductor fields effect transistors) or IGBTs (insulated gate bipolar transistors) and the microcontroller is designed in CMOS (complementary metal-oxide semiconductor) technology. In this way, a low quiescent current and high energy efficiency during operation can be achieved, so that when using commercially available batteries and an average actuation frequency of up to 20 ejection processes per day, a battery life of up to two years can be achieved. The control device has a sleep mode, the maximum quiescent current consumption in the sleep mode being less than 200 nA and preferably less than 150 nA.

In a further advantageous embodiment of the opening and closing system, the control device has current measuring means for measuring an operating current of the motor. The control device is preferably set up to recognize an end position of the spindle nut on the basis of an exceeding of a predetermined limit value of the measured motor current. In this way, it is possible to dispense with a sensor for detecting the end position of the spindle nut, which simplifies the mechanical structure of the ejection device and reduces manufacturing costs. The limit value is furthermore dependent on a measured voltage of the electrical energy store, e.g. the batteries. In this way, a reliable detection of the end position of the spindle nut is ensured, even when the batteries' charge level decreases.

In a further advantageous embodiment of the opening and closing system, the movement fitting is designed as a hinge with a pull-in device and an integrated damping device. The hinge can be a so-called single-joint, four-joint or seven-joint hinge integrated damping. Generic hinges are for example in the DE 20 2011 103 288 U1 , DE 101 21 977 B4 , EP 2 176 486 B1 or WO2014 / 118320A1 disclosed. The damping device in the hinge can have a tension or compression linear damper or a rotation damper. These dampers can be arranged in the hinge cup or in the hinge arm.

The hinge advantageously has a hinge cup which is mounted on the door side and a hinge arm which is optionally mounted directly or by means of a mounting plate on the body side. The hinge has a closing spring and a damping device. The closing spring acts here as a retraction device. The damping device in the hinge can have a tension or compression linear damper or a rotation damper. These dampers can be arranged in the hinge cup or in the hinge arm.

In a further advantageous embodiment of the hinge, the linear damper is pivotally arranged in the hinge arm and is coupled at least temporarily to at least one articulated arm of the hinge via coupling means.

In a further advantageous embodiment of the hinge, the damping device and the retraction device of the hinge are effective during the closing process between an opening angle of the door of at least 10 ° and a closed position of the door.

The operating method according to the invention is set up for an opening and closing system for a piece of furniture, which has at least one movable furniture part and a hinge with a pull-in device and a damping device, the opening and closing system being an ejection device with a tensionable mechanical energy store and a tensioning device for charging the Has mechanical energy storage, wherein the tensioning device is supplied with energy by an electrical energy storage. The operating method has the following steps: The ejection device of the opening and closing system moves the movable furniture part into a partially open position after manually pressing the movable furniture part by means of an ejection element. After a predetermined period of time, the tensioning device charges the mechanical energy store and thereby pulls in the ejection element, the movable furniture part being moved by the retraction device of the hinge and against a damping effect of the damping device into a closed position while the ejection element is being pulled in becomes. The predetermined period of time gives the user the opportunity to open the pressed-on furniture part completely. If this is not done, the furniture part is automatically brought back into the closed position by the interaction of the clamping device and the pull-in device. The advantages described in connection with the opening and closing system result.

In an advantageous development of the operating method, the ejection element is a linearly movable tappet. and the tensioning device of the ejection device has an electric motor, preferably a DC voltage low-voltage motor, with a downstream gear and a spindle, wherein a spindle nut arranged on the spindle can engage in a driver of the tappet. During the clamping process, the spindle nut is moved so that the plunger is moved into a retracted position. The spindle nut is then moved in the opposite direction to a rest position. A heart curve control is preferably provided in order to lock the plunger in the retracted rest position, the rest position of the plunger being reached for locking while the spindle nut moves in the direction of its rest position.

Fig. 1a

eine isometrische Darstellung eines Möbels mit einer Ausstoßvorrichtung;

Fig. 1b

eine Vergrößerung eines Ausschnitts von Fig. 1a;

Fig. 2, 3

jeweils eine Schnittdarstellung eines Ausschnitts des Möbels aus Fig. 1a in verschiedenen Betriebsstellungen der Ausstoßvorrichtung;

Fig. 4a, b

eine Draufsicht und eine Schrägansicht einer Ausstoßvorrichtung in einem ersten Ausführungsbeispiel in einer Ruhestellung;

Fig. 5a, b bis 8a, b

die Ausstoßvorrichtung des ersten Ausführungsbeispiels in verschiedenen Betriebsstellungen;

Fig. 9a, b

eine Draufsicht und eine Schrägansicht einer Ausstoßvorrichtung in einem zweiten Ausführungsbeispiel in einer Ruhestellung; und

Fig. 10a, b bis 12a, b

die Ausstoßvorrichtung des zweiten Ausführungsbeispiels in verschiedenen Betriebsstellungen.

The invention is explained in more detail below on the basis of exemplary embodiments with the aid of figures. The figures show:

Fig. 1a

an isometric view of a piece of furniture with an ejection device;

Fig. 1b

an enlargement of a section of Fig. 1a ;

2, 3

each a sectional view of a section of the furniture Fig. 1a in different operating positions of the ejection device;

4a, b

a plan view and an oblique view of an ejection device in a first embodiment in a rest position;

5a, b to 8a, b

the ejection device of the first embodiment in different operating positions;

9a, b

a plan view and an oblique view of an ejection device in a second embodiment in a rest position; and

10a, b to 12a, b

the ejection device of the second embodiment in different operating positions.

Fig. 1 shows an isometric view of a piece of furniture 1 with an opening and closing device according to the application. A cabinet is shown here as an example of furniture 1. The furniture 1 has a body 2 with side walls 3. On the side wall 3 shown on the left in the figure, a door is pivotably articulated as a movable furniture part 4 (hereinafter also referred to as door 4) with a movement fitting that is not visible here. The movement fitting, which here has two hinges, for example, is provided with a (self) retraction device, preferably with a damping device, so that the door 4 is retracted during the closing process as soon as a certain opening angle is undershot.

An ejection device 10 is mounted on the opposite side wall 3, as can be seen from the omissions in the body 2 and the door 4. The section of the furniture 1 with the ejection device 10 is in Fig. 1b shown enlarged in more detail.

The ejection device 10 comprises a housing 11 from which a plunger 12 can extend for opening the door 4. A sleeve 13 is arranged concentrically with the plunger 12 and serves to control the ejection device 10, as will be explained in more detail below.

In the 2 and 3 a horizontal section through the furniture 1 and the ejection device 10 is shown in the region of the ejection device 10. The figures show two different operating states of the ejection device 10. Fig. 2 shows the furniture 1 with the door 4 closed, the ejection device 10 being in a rest position. In this state, the plunger 12 (in this Fig. 2 not visible) and the sleeve 13 on the inner surface of the door 4. Between the door 4 and the side wall 3, a gap can be seen, which pushes the door 4 towards the Furniture body 2 enables. This movement serves to trigger the ejection device 10.

In Fig. 3 the ejection device 10 is shown with the plunger 12 extended. The extended plunger 12 has accordingly opened the door 4 against the closing force of the self-closing device of the movement fitting. The sleeve 13, which is also displaceable in its movement independently of the tappet 12 in the ejection device 10, is opposite the one in FIG Fig. 2 position shown also disengaged. Compared to the plunger 12, which carries out an opening movement in the range of a few 10 mm, the sleeve 13 is only disengaged by a few millimeters. As will be explained in detail below, disengaging the sleeve 13 serves to detect the position of the door 4 independently of the tappet 12.

Moved by the plunger 12 is in the Fig. 3 shown operating position, the door 4 opened so far that a user can comfortably reach behind the door 4 and open it completely. The opening angle of the door 4 is chosen by the geometry of the door 4, the positioning of the ejection device 10 and the stroke of the ram 12 so that it is still within the angular range in which the self-closing device of the movement fitting is active. Accordingly, the door 4 bears against the plunger 12 with the force applied by the pull-in device, thereby preventing the door 4 from swinging open uncontrollably after the ejection process. Furthermore, it is ensured in this way that after the plunger 12 has been retracted, the door 4 — if it has not been opened by the user — is moved back into the closed position according to FIG Fig. 2 is transferred. Thus, if the ejection device 10 is actuated unintentionally, the door 4 is automatically closed.

In Fig. 4a the ejector 10 is shown in more detail in a top view. A housing cover is removed from the housing 11 in order to obtain an insight into the internal structure of the ejection device 10. Fig. 4b shows the ejection device 10 in the same operating position as Fig. 4a in an isometric oblique view.

The ejection device 10 has an essentially rectangular oversize. The side facing the user, from which the plunger 12 also emerges, is also referred to below as the front region of the ejection device 10. In the opposite rear area of the ejection device 10 is a battery compartment 14 arranged in which batteries 140 can be inserted to supply energy to the ejection device 10. The batteries 140 can be single-use batteries or rechargeable batteries. A current consumption, in particular a quiescent current consumption, of the ejection device 10 is minimized in such a way that a battery life of up to two years can be achieved with an average actuation frequency of up to 20 ejection processes per day.

In the front area of the ejection device 10 is on one of the two sides (in Fig. 4a A control device is arranged on a circuit board 15 above the plunger 12). The circuit board 15 carries electronic components (not shown in detail) for controlling the ejection device 10, in particular a microcontroller, which is preferably constructed in a CMOS (complementary metal-oxide semiconductor) technology in order to achieve a low quiescent current. Connected to the microcontroller is a motor driver, preferably constructed as an H-bridge with switching elements that have a low volume resistance. These can preferably be MOSFET switching devices or IGBT switching devices. A current measuring means, for example a shunt, is further preferably integrated in series with the motor driver or integrated in the motor driver in order to be able to measure a motor current.

A drive unit 16 for the plunger 12 is arranged in a central region of the ejection device 10. The drive unit 16 comprises a motor 160, preferably a low-voltage DC motor, which is connected to the control device on the circuit board 15 and is controlled by the latter. A gear 161 is arranged downstream of the motor 160, in the present case a gear with two gear stages, each with helical toothed gears. Due to the helical toothing, a reduction by the gear 161 can be achieved with little noise. On the output side, the gear 161 is coupled to a spindle 162 which is arranged essentially parallel to the tappet 12 in the longitudinal direction of the housing 11. A spindle nut 163 is placed on the spindle 162 and is guided in the housing 11 in a rotationally fixed manner and displaceably in the longitudinal direction.

In the in the 4a and 4b shown rest position, the spindle nut 163 is at a front stop, ie at a maximum distance from the gearbox 161. When the spindle nut 163 is moved by rotating the spindle 162 in the corresponding direction, the end position of the spindle nut 163 is found by the spindle nut 163 against one formed by the housing 11 Stop is moved. The mechanical stop causes the current of the motor 160 to rise above a limit value, which is detected by the control device on the circuit board 15, whereupon the motor 160 is switched off in the end position of the spindle nut 163. The limit value is preferably dependent on a measured voltage of the batteries 140. Alternatively, a sensor could also be provided for detecting the end position of the spindle nut 163, for example in the form of a limit switch.

The plunger 12 has a shaft 120 which, in the illustrated position of the plunger 12, is located essentially within the housing 11. The plunger 12 is guided in the housing 11 so as to be longitudinally displaceable with the shaft 120. At the front end of the shaft 120, the plunger 12 with a head 121 projects slightly beyond the front surface of the housing 11. The head 121 can be made of a rubberized or otherwise elastic material in order to ensure that the plunger 12 strikes the door 4 as silently as possible. On the side opposite the head 121, the plunger 12 is coupled to a heart curve control 122. In a known manner, the heart curve controller 122 is set up to latch the plunger 12 in the retracted state shown. In this state, it is pretensioned by a spring arranged in the interior of the plunger 12 and not visible in this operating position of the plunger 12. A driver 123 is arranged on the side of the plunger 12, into which the spindle nut 163 can engage and can move an extended plunger 12 back.

As already in connection with the 1a and 1b explained, the plunger 12 is surrounded concentrically by a sleeve 13. This has a ring 130 in the outer region, which is also guided in a longitudinally displaceable manner by a laterally arranged guide 131. In the area of the guide 131, a spring 132 is arranged, which moves the ring 130 out of the housing 11 with little spring force. The length of the ring 130 ranges from a few millimeters to one centimeter. The freedom of movement of the sleeve 13 from the housing 11 is also limited to a few millimeters. With a projection formed on the ring 130 or on the guide 131, the sleeve 13 actuates the microswitch 150 arranged on the circuit board 15. The sleeve 13 and the microswitch 150 are positioned such that the sleeve 13 extends out of the housing 11 from one specific position of the sleeve 13 is detected.

Different operating positions of the ejection device 10 and different operating positions of the plunger 12 and the driver 123 are described below with reference to FIG Figures 5a to 8a or 5b to 8b. The figures with the index a each show the ejection device 10 analogously to Fig. 4a in a top view, figures with the index b corresponding to analog Fig. 4b in a symmetrical oblique view.

In the Figure 4a A first vertical broken line 20 indicates the rest position of the front surface of the head 121 of the plunger 12 and also of the sleeve 13. In this position, the head 121 or the sleeve 13 is in accordance with the door 4 closed Fig. 1a or. Fig. 2 .

To open the door 4, it is moved out of the rest position (line 20) in the direction of the furniture body 2. The freedom of movement for the door 4 in the direction of the body 1 is in Fig. 2 given gap between door 4 and side wall 3 given. It is a few millimeters (mm), in particular about 2 mm. The position up to which the door 4 and thus the head 121 of the plunger 12 can be moved is in FIG Fig. 4a represented by a second dashed line 21.

The Figures 5a and 5b show the ejection device 10 again in exactly this position (line 21). Pressing the plunger 12 into this position requires the locking of the heart cam control 122 to be released, so that the plunger 12, when loaded with the spring force of the spring, extends and pushes open the door 4 as soon as the user releases the door 4 for it after being pressed in.

The Figures 6a and 6b show the ejection device 10 after the plunger 12 has been fully extended. The position of the head 121 of the fully extended plunger 12 is in FIG Fig. 6a indicated by a dashed line 22.

In the Figures 6a and 6b the spring already mentioned, identified by reference numeral 17, can be seen. By pushing open the door 4, the ring 130 of the sleeve 13, driven by the spring 132, can also move to a maximally extended position, as a result of which the switch 150 is actuated. The opening of the door 4 is thus detected by the switch 150, which then activates the control device on the circuit board 15. A timer is initially started in the control device, initially without further actions expires for an adjustable or predetermined time. During this time, the user is given the opportunity to reach behind the door 4 pushed open by the plunger 12 and to open it completely. The time can range from a few seconds to a few tens of seconds.

After this time has elapsed, the motor 160 is activated and the spindle 162 rotates so that the spindle nut 163 moves in the direction of the battery compartment 14. The spindle nut 163 engages in the driver 123 of the plunger 12 and correspondingly pulls the plunger 12 back into the housing 11, the spring 17 being tensioned. As in Figures 7a and 7b can be seen, the sleeve 13 remains in the extended position, since the door 4 is not yet closed. The spindle 12 is retracted until a state in which the spring 17 is fully tensioned and the heart cam control 122 locks the plunger 12. This end position of the plunger 12 can in turn be measured by measuring the operating current of the motor 160.

After the plunger 12 has been retracted into said latched end position, the motor 160 is reversed in order to rotate the spindle 162 in the opposite direction. Correspondingly, the spindle nut 163 moves back to the front stop, as in the Figures 8a and 8b is shown. After manual closing of door 4 by the user, the system is then back to the initial state it was in Figures 4a and 4b is shown.

If starting from the in the Figures 6a and 6b shown operating position, the door 4 is not opened manually by the user, it will close again when the plunger 12 is retracted due to the pull-in device. Even then, after the spindle nut 163 has been moved out again, the system is again in the position shown in FIG Figures 4a and 4b shown operating state.

In the Figures 9a to 12a or 9b to 12b is in the same way as in the Figures 4a to 8a or. 4b to 8b reproduced a second embodiment of an ejection device 10 in plan view or an isometric oblique view. The same reference numerals in these figures denote the same or equivalent elements as in the preceding figures.

Regarding the basic structure corresponds to that in the Figures 9a to 12a and 9b to 12b shown ejection device 10 of the first embodiment, to the description of which reference is hereby made. In particular, the ejection device 10 of the second embodiment as well as that of the first embodiment in the in Fig. 1a shown furniture can be used.

In contrast to the first exemplary embodiment, the ejection device 10 shown here does not have a sleeve 13, via which the position of the moving furniture part in cooperation with the switch 150 was detected in the first exemplary embodiment. In the present case, instead of the sleeve 10, a protruding actuator 124 is attached to the shaft 120 of the plunger 12 in the rear region of the plunger 12, said actuator actuating the switch 150 when the plunger 12 is fully extended. In this way, an open furniture door is detected based on the extended plunger 12.

In the Figures 9a and 9b The ejection device 10 is initially shown in the rest position, in which the spring 17, which is again not visible here, is fully tensioned and the plunger 12 is locked by the heart curve control 122. Pushing in the movable furniture part, for example the door 4 according to Fig. 1a leads to the pushing in of the plunger 12 and thus to the unlocking of the heart curve control 122. This is shown in FIGS Figures 10a and 10b reproduced.

As a result, the plunger 12 is driven by the spring 17 and opens the movable furniture part. The fully extended position is in the 11a and 11b reproduced. In Fig. 11a the actuation of the switch 150 by the actuator 124 is clearly recognizable.

Once again after the predetermined or adjustable waiting time has elapsed, the drive motor 160 is operated in a direction of rotation in which the spindle nut 163 pulls the plunger 12 into the housing 11 via the driver 123 and thereby tension the spring 17. The position of the spindle nut 163 at the end of this retraction and clamping process is in the Figures 12a and 12b reproduced. By retracting the heart cam control 122 locks the plunger 12 again in the fully retracted position of the plunger 12. After the spindle nut 163 is then moved back to the front position, the system is again in the in the Figures 9a and 9b illustrated hibernation.

Reference list

1

Furniture

2nd

Body

3rd

Side wall

4th

movable furniture part (door)

10th

Ejection device

11

casing

12th

Pestle

120

shaft

121

head

122

Heart curve control

123

Carrier

124

Actuator

13

Sleeve

130

ring

131

guide

132

feather

14

Battery compartment

140

battery

15

circuit board

150

counter

16

Drive unit

160

engine

161

transmission

162

spindle

163

Spindle nut

17th

feather

20, 21, 22

Line (for position identification)

Claims (22)

1. Opening and closing system for an item of furniture (1) which has at least one movable furniture part (4) and a movement fitting, wherein the opening and closing system has an ejection apparatus (10) with a loadable mechanical force store and a tensioning apparatus for loading the mechanical force store, wherein the tensioning apparatus is supplied with energy by an electrical energy storage device, and wherein the ejection apparatus (10) is designed, when the mechanical energy store is unlocked, to move the movable furniture part into a partially open position, wherein the movement fitting comprises a retraction apparatus and a damping apparatus which is provided to move the movable furniture part (4) in a damped manner from a further partially open position which lies within a predetermined effective range into a closed position,
   characterized in that the partially open position of the movable furniture part (4) achieved by the ejection apparatus (10) lies within the predetermined effective range of the retraction apparatus.
2. Opening and closing system according to claim 1, in which the ejection apparatus (10) has a linearly displaceable plunger (12) as ejection element for the movable furniture part.
3. Opening and closing system according to claim 2, in which a spring (17) is provided as a mechanical force store.
4. Opening and closing system according to claims 2 and 3, in which a heart cam control (122) is provided in order to lock the plunger (12) in a retracted rest position when the spring (17) is tensioned and to release it beyond the rest position after mechanical impression.
5. Opening and closing system according to one of claims 2 to 4, in which the tensioning apparatus has a sensor which detects a position of the plunger (12).
6. Opening and closing system according to one of claims 2 to 4, in which the ejection apparatus (10) has a mechanical slide which projects in a pretensioned manner beyond a housing (11) of the ejection apparatus (10) and, in a closed position of the movable furniture part (4), rests against the latter, wherein the ejection apparatus (10) has a sensor which detects a position of the slide.
7. An opening and closing system according to claim 6, in which the mechanical slide is a sleeve (13) arranged concentrically relative to the plunger (12) around the plunger (12).
8. Opening and closing system according to one of claims 5 to 7, in which the sensor is a pushbutton (150) whose contacts are open when the movable furniture part is in the closed position.
9. Opening and closing system according to one of claims 2 to 8, in which the tensioning apparatus of the ejection apparatus (10) has an electric motor (160), preferably a DC low-voltage motor, with a downstream gear (161) and a spindle (162), wherein a spindle nut (163) arranged on the spindle (162) engages in a driver (123) of the plunger (12) in order to move the latter into the rest position.
10. Opening and closing system according to claim 9, in which the ejection apparatus (10) comprises a circuit board (15) with a control device which has a microcontroller and switching elements controlled by it in an H-bridge arrangement.
11. Opening and closing system according to claim 10, in which the switching elements of the H-bridge arrangement are MOSFETs or IGBTs.
12. Opening and closing system according to claim 10 or 11, in which the control device comprises current measuring means for measuring an operating current of the motor (160).
13. Opening and closing system according to claim 12, in which the control device is adapted to detect an end position of the spindle nut (163) by exceeding a predetermined limit value of the measured motor current.
14. Opening and closing system according to claim 13, in which the limit value depends on a measured voltage of the electrical energy storage device.
15. Opening and closing system according to one of claims 1 to 14, in which the electrical energy storage device comprises at least one battery (140) arranged in the ejection apparatus (10).
16. Opening and closing system according to claim 1, in which the movement fitting is formed by a hinge with a hinge pot on the door side and a hinge arm, which is optionally mounted directly or by means of a mounting plate on the body side, wherein the hinge has a closing spring and a damping apparatus.
17. Opening and closing system according to claim 16, in which the damping apparatus has a tension or compression linear damper or a rotary damper in the hinge and the damper is arranged in the hinge pot or in the hinge arm.
18. Opening and closing system according to claim 17, in which the tension or compression linear damper is pivotably arranged in the hinge arm and is coupled via coupling means at least temporarily to at least one articulated arm of the hinge.
19. Opening and closing system according to claim 17, in which the rotational damper is arranged in the hinge pot and is coupled via coupling means at least temporarily to at least one articulated arm of the hinge.
20. Operating method for an opening and closing system for an item of furniture (1) which comprises at least one movable furniture part (4) and a hinge with a retraction apparatus and a damping apparatus, wherein the opening and closing system comprises an ejection apparatus (10) with a loadable mechanical force store and a tensioning apparatus for loading the mechanical force store, wherein the tensioning apparatus is supplied with energy by an electrical energy storage device, wherein

    - the ejection apparatus (10) of the opening and closing system moves the movable furniture part (4) into a partially open position by manually pressing the movable furniture part (4) by means of an ejection element; characterized in that

    - after a predetermined period of time, the tensioning apparatus loads the mechanical force store and in this case retracts the ejection element; and that

    - during the retraction of the ejection element, the movable furniture part (4) is moved into a closed position by the retraction apparatus of the hinge and against a damping action of the damping apparatus.
21. Operating method according to claim 20, wherein the ejection element is a linearly movable plunger (12) and the tensioning apparatus of the ejection apparatus (10) has an electric motor (160), preferably a DC low-voltage motor, having a downstream gear (161) and a spindle (162), wherein a spindle nut (163) arranged on the spindle (162) engages in a driver (123) of the plunger (12), wherein

    - during the tensioning operation the spindle nut (163) is moved in such a way that the plunger (12) is moved into a retracted position, and

    - subsequently the spindle nut (163) is moved in the opposite direction to a rest position.
22. Operating method according to claim 21, in which a heart cam controller (122) is provided to lock the plunger (12) in the retracted rest position, wherein

    - the rest position of the plunger (12) for locking is reached while the spindle nut (163) moves into the direction of its rest position.

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