Locking device for releasably locking two furniture parts that can be moved relative to each other

Abstract

Locking device (1) for releasably locking two furniture parts (2) movable relative to each other against the force of a power storage device (3), comprising a heart-shaped locking contour (4) with, preferably exactly, a heart-shaped recess (5) and at least one locking element (6) movable relative to the heart-shaped locking contour (4), in particular a bolt-shaped one, which can be arranged in a locking position (V) in the heart-shaped recess (5) of the heart-shaped locking contour (4), wherein the at least one locking element (6) can be moved from the locking position (V) into an overpressure position (U) from the heart-shaped recess (5) into a release position (F), wherein the locking device (1) comprises a push-through recess (7) separate from the heart-shaped recess (5), in which the at least one locking element (6) can be arranged, and at least one deflection contour. (8) exhibitswhich blocks movement of the at least one locking element (6) from the push-through recess (7) into the heart recess (5), wherein it is preferably provided that the heart recess (5) is spatially separated from the deflecting contour (8) and / or is designed in the form of a separate structure.

Description

[0001] The invention relates to a locking device for releasably locking two furniture parts movable relative to one another against the force of an energy accumulator, comprising a heart-shaped locking contour with, preferably precisely, a heart-shaped recess and at least one locking element, in particular a bolt-shaped element, which is movable relative to the heart-shaped locking contour and can be arranged in a locking position in the heart-shaped recess of the heart-shaped locking contour, wherein the at least one locking element can be moved from the locking position into an overpressure position from the heart-shaped recess into a release position. Furthermore, the invention relates to an ejection device for a movable furniture part, comprising at least two components movable relative to one another and at least one energy accumulator which acts between the at least two components.The invention further relates to an ejection device for a movable furniture part, comprising at least two levers pivotable relative to one another, at least one energy accumulator which, in a loaded state, applies a force to the at least two levers in the direction of an open pivoted position, and at least one locking device for releasably locking the at least two levers in a closed position against the force of the loaded energy accumulator. Furthermore, the invention relates to a piece of furniture having a furniture body and at least one furniture part movable relative to the furniture body.

[0002] Locking devices with heart-shaped locking contours and ejection devices with such locking devices are known from the prior art. However, such ejection devices have the problem that the locking device always locks when the ejection device is in the closed position. However, there are applications in which an ejection device is required that does not automatically generate a locking action upon entering the closed position. For example, the ejection devices and locking devices from the prior art are not suitable for locking depending on the relative position—for example, of the ejection device—in the closed position, since the locking device locks in any position of the closed position.

[0003] JP2011-162994 describes a door frame with a movable furniture part consisting of two panels and an ejection device. A lever of the ejection device is pressed against a guide rail of the door frame by a compression spring arranged centrally on a base in order to spread the movable furniture part from a closed position to an open position. During a manual closing process of the movable furniture part, the lever engages the guide rail of the door frame again, the movable furniture part moves into the closed position, and the compression spring is thereby subjected to force. In the closed position, the ejection device is locked by a locking device. The locking device consists of a gripper, which generates a locking action by engaging a hook.

[0004] A disadvantage of the prior art is that, due to the design of the ejection device consisting of a single lever, which generates an opening action of the movable furniture part via a single spring around a rotation axis, a separately arranged guide rail is provided. Due to its structural size, the separately arranged guide rail cannot be arranged between the panels of the movable furniture part, thus only allowing the transition between a closed position and an open position via the ejection device. Furthermore, the locking mechanism locks the ejection device at small opening angles of the panels of the movable furniture part, thus eliminating the need to spread the movable furniture part from a folded position using the ejection device.This is due to the design of the locking mechanism and the compression spring located centrally on the base. The compression spring transmits force to the lever perpendicular to the base and prevents small opening angles of the panels, especially without locking the ejection mechanism at small angles between the lever and the base while maintaining the same functionality. Furthermore, the force of the ejection mechanism is transmitted jerkily by the compression spring, resulting in less comfortable use of the furniture and a reduced service life of the components involved in the opening process.

[0005] Further locking devices are known from the documents WO 2016 / 081960 A1, WO 2017 / 000006 A1 and US 2007 / 120380 A1.

[0006] The objective technical object of the present invention is therefore to provide a locking device, an ejection device with a locking device and a piece of furniture with such an ejection device which are improved compared to the prior art, in which the disadvantages of the prior art are at least partially eliminated and which are characterized in particular in that a locking is selectively dependent on how far the locking device closes.

[0007] The problem is solved by the features of claim 1, claim 7, claim 8 and claim 12.

[0008] It is therefore provided according to the invention that the locking device has a push-through recess which is separate from the heart recess and in which the at least one locking element can be arranged, and at least one deflection contour which blocks a movement of the at least one locking element from the push-through recess into the heart recess, wherein it is preferably provided that the heart recess is spatially separated from the deflection contour and / or is designed in the form of a separate structure.

[0009] The at least one heart recess ensures a locking state, wherein the at least one deflection contour guides the at least one locking element into the push-through recess upon over-pressuring of the locking device from the locking state. If the at least one locking element is located in the push-through recess, the at least one locking element is guided past the heart recess via the at least one deflection contour and transferred into a release position upon transition to a less over-pressurized position of the locking device.

[0010] If the locking device is in the release position, then when pressure is continuously exerted on the locking device, the at least one locking element is guided past the heart recess and into the pressure-through recess, whereby the transition to a new release position is made possible after the pressure has been exerted.

[0011] If the pressure exerted on the locking device is terminated substantially immediately after the at least one locking element has been raised above the heart cavity, the at least one locking element is arranged in the heart cavity and the locking state is established. .

[0012] This makes it possible for the locking device to be transferred from the release position to the locking state and from the locking state to the release position and from the release position to the release position again without subsequent locking, depending on the pressure exerted. ist.

[0013] The locking device thus enables selective locking, depending on several possible relative positions of the locking element with respect to the heart-shaped locking contour.

[0014] Furthermore, it is provided according to the invention that the ejection device has at least one such locking device, wherein the heart-shaped locking contour is arranged on one and the at least one locking element is arranged on the other of the at least two components which are movable relative to one another. ist.

[0015] This makes it possible for at least one locking element to come to rest in the heart-shaped locking contour when pressure is exerted on the ejection device and for the ejection device to be transferred into a secure closed position. ist.

[0016] Furthermore, the invention provides that the at least one locking device is designed such that the at least two levers are freely movable relative to one another in an unlocked position in which the levers enclose an angle which is smaller than the angle of the levers in the closed position.

[0017] The fact that the at least two levers are freely movable relative to one another in the push-through position makes it possible for the at least one locking element of the locking device to be guided past the heart-curved locking contour via the at least one deflection contour, thus ensuring the transition of the ejection device into the open pivoting position.

[0018] Regardless of whether the ejection device was previously in the closed position or in an open pivoting position, when pressure is applied beyond the closed position the ejection device transitions into a push-through position and when the pressure is stopped it transitions into the open pivoting position.

[0019] The force of at least one energy accumulator is effective both in the closed position for effective locking and in the push-through position to support the movement into the open pivoting position.

[0020] Furthermore, the invention provides that the piece of furniture has at least one such ejection device.

[0021] This makes it possible for the at least one ejection device to assist in transferring the at least two plates of the movable furniture part from the coplanar position into an open position and the at least two plates from the parallel position into a spread-open position.

[0022] In the parallel position, the at least one ejection device is in the push-through position, with the locking devices arranged thereon being in the over-pressing position. This allows the force of the energy accumulator to act upon movement from the parallel position, enabling the at least two plates to unfold.

[0023] In the coplanar position, the at least one ejection device is in the closed position, with the locking devices arranged thereon being in the locked position. This inhibits the force of the energy accumulators, and the at least two plates remain stationary in the coplanar position. When the at least one ejection device transitions to the push-through position, the locking device is in the over-pressing position, with the force of the energy accumulators acting and enabling the at least two plates to open.

[0024] This ensures that the movable furniture part can be opened from a coplanar position as well as spread out from a parallel position by the at least one ejection device.

[0025] Advantageous embodiments of the invention are defined in the dependent claims.

[0026] According to an advantageous embodiment of the invention, it is provided that the at least one deflection contour has at least one deflection bevel with which the at least one locking element can be pushed in the direction of the release position starting from an arrangement in the push-through recess.

[0027] The deflection bevel makes it possible that, after the at least one locking element has been arranged in the push-through recess, the at least one locking element is guided past the heart-curved locking element and the locking device does not move into the locking position - but into the release position.

[0028] In one embodiment of the invention, it is provided that the locking device has at least one bypass channel through which the at least one locking element can be moved past the heart cavity into the push-through cavity.

[0029] The at least one bypass channel particularly facilitates the transition of the at least one locking element from the release position past the heart-shaped locking contour and the at least one deflection contour into the pressure-through recess.

[0030] Advantageously, it is provided that the locking device has at least one inlet opening for the at least one locking element and the heart-curved locking contour and the at least one deflection contour are arranged between the at least one inlet opening and the push-through recess.

[0031] The at least one locking element can move from the release position into the heart-shaped locking contour and / or the pressure-through recess via the at least one inlet opening.

[0032] Because the at least one deflection contour and the heart-shaped locking contour are arranged between the push-through recess and the at least one inlet opening, depending on the degree of overpressure from the release position, either the locking position and then the renewed release position can be established, or the renewed release position can be established without intermediate locking. In both variants, the at least one locking element enters the push-through recess before the release.

[0033] It has proven advantageous that at least the heart-shaped locking contour, the push-through recess and the at least one deflection contour are arranged on a common base.

[0034] This reduces maintenance effort and extends service life, as there are fewer separate components in the locking device.

[0035] It has proven advantageous that the at least one locking element is arranged on one, preferably at least two, levers which can be pivoted relative to one another.

[0036] As a result, the at least one locking element can enter the at least one inlet opening of the locking device upon movement of the pivotable lever relative to a second component or lever.

[0037] According to the invention, in the ejection device according to claim 8, it is provided that the at least one locking device is designed according to one of claims 1 to 5, wherein the heart-curve-shaped locking contour is arranged on one and the at least one locking element is arranged on the other of the at least two levers which can be pivoted relative to one another.

[0038] As a result, the movement of the at least one locking element between the at least one inlet opening and the push-through recess takes place in a particularly favorable manner.

[0039] It is particularly preferred that one of the at least two levers has fastening means for fastening the ejection device to the movable furniture part, and / or one of the at least two levers has a free end on which at least one rotatably mounted rolling body for supporting the lever on a stop surface, and / or one of the at least two levers has a free end on which at least one spacer is arranged, preferably wherein the at least one spacer can be arranged in different positions relative to the free end.

[0040] The fastening means ensure that the ejection device can be securely fixed to the movable furniture part after assembly.

[0041] The rolling elements arranged at the free end reduce friction during contact between the ejection device and the stop surface, thereby increasing the service life of both the ejection device and the stop surface. The stop surface can be arranged on a separate component of a piece of furniture or be an integral part of the furniture. Particularly preferably, the stop surface is formed by the furniture body during the transition between the coplanar position and the open position, and by one of the at least two plates during the transition between the parallel position and the spread position.

[0042] The at least one spacer located at the free end allows the structural design of the furniture to be accommodated by adjusting the distance between the ejection device and the stop surface. Depending on the spacer setting, the locking mechanism of the ejection device is moved into the overpressure position earlier or later when a user applies pressure. Furthermore, the spacer can be used for fine adjustment to ensure the locking position at a predetermined angle between the at least two levers.

[0043] It has proven advantageous that the ejection device has a first part of a locking device which can be brought into operative connection with a second part of the locking device which can be arranged on a piece of furniture, preferably wherein one of the two parts of the locking device has a permanent magnet and the other of the two parts is made of metal at least in some areas, and / or the first part of the locking device is arranged on an outer side of the ejection device.

[0044] The two-part locking device allows the structural dimensions of the furniture and / or the design conditions to be taken into account before assembly.

[0045] The locking device supports the at least one force accumulator in such a way that, in the locking position, the at least one locking element is pressed into the heart recess of the heart-curved locking contour in order to prevent an undesired release of the locking in the coplanar position.

[0046] Furthermore, it is preferably provided that at least one spreading element is arranged between the at least two levers and at least one further force accumulator is provided, wherein the at least two levers can be subjected to force by the at least one further force accumulator via the at least one spreading element.

[0047] This results in the advantageous effect that the force application to the at least two levers via the at least one spreading element is mediated by the at least one further force accumulator in addition to the at least one force accumulator.

[0048] Furthermore, this offers greater comfort in the operation of the ejection device and / or the furniture, since less force has to be exerted by the user and even more massive and / or larger movable furniture parts can be opened or spread apart using the ejection device in a force-saving manner.

[0049] Furthermore, a harmonious force distribution of the at least one ejection device occurs during the movement of the movable furniture part, since the at least one additional force accumulator acts mediated by the at least one spreading element. This protects the components of the furniture and ensures user-friendly handling of the ejection device or the furniture itself.

[0050] It is particularly preferred that the at least one further force accumulator is arranged substantially parallel to one of the at least two levers.

[0051] This makes it possible for substantially no force to act on the at least one expansion element in the closed position of the ejection device, since in the locking state a dead center position is substantially established between the at least one further force accumulator with respect to one of the at least two levers.

[0052] Furthermore, a particularly favourable transmission of force from the at least one further energy storage device to the at least two levers takes place, which results in both a gentle and harmonious opening or spreading process and a loading process of the at least one further energy storage device.

[0053] It has proven advantageous that the at least one force accumulator and / or the at least one further force accumulator is designed in the form of at least one spring.

[0054] Since springs are inexpensive to produce and purchase, they can be used to create a cost-effective ejection device.

[0055] According to an advantageous embodiment of the invention, it is provided that the at least one further energy storage device is arranged between a stationary energy storage holder and a force storage holder movable relative thereto and / or the at least one further energy storage device is arranged on at least one cross strut connected to the at least one spreading element, preferably wherein the at least one cross strut comprises at least one rolling element for movement along one of the at least two levers.

[0056] The stationary force storage bracket enables force transmission via one of the at least two levers to the movable furniture part and subsequently to the furniture itself. The movable force storage bracket enables force transmission via the at least one expansion element to the at least two levers.

[0057] The arrangement of the movable force storage holder on the at least one cross strut enables a more flexible installation of the at least one further force storage device and, due to an extension of the at least one cross strut, several further force storage devices can also be accommodated.

[0058] By moving the at least one cross strut when spreading or loading the ejection device, rolling elements prove to be particularly advantageous since the friction to one of the at least two levers is reduced and guidance takes place at a distance of a radius of the rolling elements to one of the at least two levers.

[0059] According to an advantageous embodiment of the invention, it is provided that the at least one spreading element is articulated to the at least one cross strut and / or one of the at least two levers.

[0060] This makes it possible to transmit the movement of the at least one cross strut initiated by the at least one further force accumulator to the at least two levers by a rotational movement of the at least one spreading element.

[0061] An advantageous variant consists in that the at least one energy accumulator and / or the at least one further energy accumulator can be charged by a movement of at least one of the at least two levers.

[0062] This makes it possible for the energy stored in the energy storage devices during the movement of at least one of the at least two levers to subsequently be available for the movement of the movable furniture part and to assist the user in moving the movable furniture part.

[0063] It is particularly preferred that the at least one movable furniture part has at least two plates which are connected to one another in an articulated manner and which can be moved between a coplanar position in which the at least two plates are arranged substantially in the same plane and a parallel position in which the at least two plates are arranged substantially parallel to one another, the at least one ejection device is designed according to one of claims 7 or 8 to 16 and is arranged on one of the at least two plates, and the at least two levers are arranged in the locked closed position when the at least two plates are in the coplanar position and in the unlocked push-through position when the at least two plates are in the parallel position.

[0064] The ejection device in the locked closed position in the coplanar position of at least two plates prevents unintentional opening of the movable furniture part.

[0065] The ejection device, which is present in the unlocked push-through position in the parallel position of the at least two panels, enables automatic spreading of the movable furniture part, provided that this spreading is not prevented (if desired) by a lateral receiving shaft or a provided carriage.

[0066] According to a preferred embodiment of the invention, it is provided that at least one receiving shaft, preferably arranged laterally of the furniture body, is provided for receiving the at least one movable furniture part arranged in the parallel position of the at least two plates.

[0067] By lowering the movable furniture part into a side slot, the furniture body is freely accessible. Furthermore, the absence of a movable furniture part positioned parallel to the front of the furniture creates an aesthetically pleasing piece of furniture.

[0068] It has proven advantageous that the at least one ejection device can be transferred from the locked closed position into the open pivoted position by exerting pressure on the at least two plates, wherein it is preferably provided that the pressure can be exerted in a region in which the at least two plates are connected to one another in an articulated manner.

[0069] This allows the furniture operator to easily release the at least one ejection device in the closed position. The at least one locking element is moved from the heart-shaped curve into the overpressure recess, and the locking device can move into the release position.

[0070] It has proven advantageous to provide at least one carriage which can be moved, preferably along at least one horizontally arranged rail, and which can be coupled to one of the at least two panels, preferably by means of at least one hinge, wherein it is preferably provided that the at least one carriage can be lowered into the at least one receiving shaft together with the movable furniture part, and / or the carriage is supported on a guide via at least one guide roller during a movement along the at least one rail and / or a movement of the at least one expansion element can be blocked by means of the at least one carriage.

[0071] The at least one carriage guides the movement of the at least two panels, ensuring stable movement of the movable furniture part along the furniture body. This also prevents one of the at least two panels from slipping out of place.

[0072] The at least one guide roller facilitates the movement of the at least one carriage along the at least one rail, since the friction between the at least one carriage and the at least one rail is reduced.

[0073] According to an advantageous embodiment of the invention, it is provided that at least one ejection device is provided for ejecting the at least two plates from the at least one receiving shaft.

[0074] The at least one ejection device makes it easier for the user of the furniture to transport the movable furniture part from a recessed position in the receiving shaft, wherein outside the at least one receiving shaft the at least one ejection device causes the at least two panels to spread apart.

[0075] Further details and advantages of the present invention are explained in more detail below with reference to the exemplary embodiments shown in the drawings. Fig. 1a-1b shows an ejection device according to a first preferred embodiment in an open state in a perspective view and a side view, Fig. 2a-2b shows the ejection device according to the Fig. 1a shown embodiment in an unlocked state with a recess shown in the illustration for disclosing a locking device according to a preferred embodiment in a perspective view and a view from the side, Fig. 3a-3h the locking device according to a first preferred embodiment in various chronologically shown positions from a release position into a locking position as well as from the locking position via an overpressure position into a release position in views from the side of the ejection device according to the in Fig. 2a shown embodiment, Fig. 4 a piece of furniture according to a preferred embodiment with a lateral receiving shaft, an ejection device according to the in Fig. 1a shown embodiment and two plates in a coplanar position in a view from above with two Fig. 5a-5bDetail views of a limiting element in the coplanar position and an over-pressed position, the ejection device according to the in Fig. 1a shown embodiment with contact to a furniture body in two different positions of a spacer, Fig. 6a-6bthe furniture according to the in Fig. 4 shown embodiment with the two plates in a parallel position in a laterally arranged receiving shaft, Fig. 7 an exploded view of the ejection device into its individual components according to the Fig. 1a shown embodiment in a perspective view, Fig. 8a-8d an ejection device according to a second preferred embodiment between a movable furniture part and the furniture body of a piece of furniture with a locking device according to a second preferred embodiment, in different positions between the coplanar position and an open position of the movable furniture part and a lateral receiving shaft in a view from above, Fig. 9a-9c the ejection device according to the in Fig. 8a shown embodiment between two plates of the movable furniture part of the furniture according to the Fig. 8a shown embodiment in different positions between the parallel position and a spread position of the movable furniture part in a view from above, Fig. 10a-10b the ejection device according to the in Fig. 8a shown embodiment in an enlarged view from the side in a push-through position and an open pivot position, Fig. 11a-11b the ejection device according to the in Fig. 8a shown embodiment in an enlarged perspective view, Fig. 12a-12c a piece of furniture according to a further preferred embodiment with a lateral receiving shaft, an ejection device according to the in Fig. 8a shown embodiment and different positions of the movable furniture part, guided by a carriage, in a perspective view, Fig. 13 an exploded view of the ejection device according to the in Fig. 8a shown embodiment into its individual components, Fig. 14a-14b the ejection device according to the Fig. 8a shown embodiment in a closed position with a representation of the component contours and a detailed view of a locking mechanism according to a further preferred embodiment in the locking state and the release position, Fig. 15 a torque curve of an ejection device according to a further preferred embodiment with two energy accumulators and two further energy accumulators.

[0076] Fig. 1a shows an ejection device 20 for a movable furniture part 2 (not visible for reasons of clarity), comprising two components 21 movable relative to one another and two energy accumulators 3 in the form of a spring 35 (leg spring). The two energy accumulators 3 act between the two components 21, wherein the two components 21 are designed in the form of two levers 22.

[0077] The ejection device 20 has a locking device 1, wherein a heart-shaped locking contour 4 is arranged on one and a locking element 6 on the other of the two components 21 which are movable relative to one another.

[0078] Fig. 1b shows the ejection device 20 with two levers 22 pivotable relative to one another and two energy accumulators 3, which apply a force to the two levers 22 in a loaded state in the direction of an open pivot position G, and a locking device 1 for releasably locking the two levers 22 in a closed position S against the force of the loaded energy accumulators 3.

[0079] The locking device 1 is designed such that the two levers 22 are freely movable relative to one another in a push-through position D, in which the levers 22 enclose an angle 23 which is smaller than the angle 23 of the levers 22 in the closed position S, in an unlocked state.

[0080] Fig. 2a respectively Fig. 2b differ from Fig. 1a respectively Fig. 1b in that the two levers 22 are pivoted from the open pivot position G towards the closed position S and, in the illustration, have a recess in the two levers 22 in order to make the locking device 1 present in the release position F visible.

[0081] Fig. 3a shows the locking device 1 for the releasable locking of two furniture parts 2 movable relative to one another against the force of an energy accumulator 3 (not visible in the detailed section) in an enlarged view.

[0082] The locking device 1 comprises the heart-shaped locking contour 4 with a heart recess 5 and the locking element 6 which is movable relative to the heart-shaped locking contour 4.

[0083] The locking element 6 can be arranged on one of the two levers 22 via a guide, wherein the locking element 6 can be moved, for example, in the direction of a longitudinal extension of the lever. The locking element 6 can also be arranged as in Fig. 2a be pivotally mounted in order to be able to follow the contours of the locking device 1.

[0084] The locking device 1 is in the release position F, since the locking element 6 is not arranged in the coronary trough 5 and is also not arranged beyond it (in this upward view), for example, in a bypass channel 10 or a push-through trough 7. In this position, the locking element 6 enters an inlet opening 11 of the locking device 1.

[0085] The heart-shaped locking contour 4 and a deflection contour 8 are arranged between the inlet opening 11 and the push-through recess 7.

[0086] The locking element 6 is arranged on one of two levers 22 that can be pivoted relative to one another. The heart-shaped locking contour 4 is arranged on one of the two levers 22 that can be pivoted relative to one another, and the locking element 6 is arranged on the other of the two levers 22 that can be pivoted relative to one another.

[0087] Fig. 3b shows the locking device 1 still in the release position F, with the two levers 22 further in relation to Fig. 3a are pivoted towards each other.

[0088] Fig. 3c shows the locking device 1 in an over-pressing position U, wherein the two levers 22 are arranged in a pushing-through position D. The locking element 6 is arranged above the heart recess 5, since in the sense of the invention, that end of the locking element 6 is considered which has entered the inlet opening 11 of the locking device 1.

[0089] Fig. 3d shows the locking device 1 in a locking position V, in which the locking element 6 is arranged in the heart recess 5 of the heart-curved locking contour 4.

[0090] Fig. 3e shows the locking device 1 in the overpressure position U, with the locking element 6 arranged in the bypass channel 8. The levers 22 are in the push-through position D.

[0091] Fig. 3f shows the locking device 1 in the overpressure position U, wherein the locking element 6 is arranged in the push-through recess 7. In this position, the levers 22 are completely pivoted relative to each other and are essentially in a parallel position to each other.

[0092] Fig. 3g shows the locking device 1 on the way between the overpressure position U and the release position F, wherein the locking element 6 from the push-through recess 7 hits a deflection bevel 9 of the deflection contour 8 and the locking element 6 is pushed to the left of the bypass channel 10 in this view.

[0093] After the locking element 6 passes the deflection slope 9, the locking element 6 can exit past the heart-shaped locking contour 4 via the inlet opening 11. This can generally be generated automatically after the contact of the deflection contour 8 has ended or via a preload (in this view in a left direction) of the locking element 6.

[0094] Fig. 3h shows the locking device 1 in the position in which the locking device 1 has again moved into the release position F. The described cycle can be repeated. The locking element 6 can also be pressed directly into the push-through recess 7 without stopping in the heart recess 5 in order to move back into the release position F without setting the locking state V.

[0095] The locking element 6 is arranged in a locking position V in the heart recess 5 of the heart-curved locking contour 4 and the locking element 6 can be moved from the heart recess 5 into a release position F by a movement from the locking position V into an overpressure position U.

[0096] The locking device 1 has the push-through recess 7, which is separate from the heart recess 5 and in which the locking element 6 is movable in the overpressure position U. The locking device 1 has the deflection contour 8, which blocks movement of the locking element 6 from the push-through recess 7 into the heart recess 5.

[0097] The deflection contour 8 has the deflection bevel 9, with which the locking element 6 is urged in the direction of the release position F, starting from an arrangement in the push-through recess 7.

[0098] The locking element 6 is moved through the bypass channel 10 past the heart recess 5 into the push-through recess 7.

[0099] Fig. 4 shows a piece of furniture 40 with a furniture body 41 and a furniture part 2 movable relative to the furniture body 41, wherein the piece of furniture 40 has an ejection device 20.

[0100] The movable furniture part 2 has two plates 42 which are connected to one another in an articulated manner and which are movable between a coplanar position K, in which the at least two plates 42 are arranged in a same plane, and a parallel position P (when the two plates 42 are arranged in a receiving shaft 43), in which the at least two plates 42 are arranged parallel to one another.

[0101] The ejection device 20 is arranged on one of the two plates 42. The two levers 22 are arranged in the locked closed position S, since the two plates 42 are in the coplanar position K.

[0102] The ejection device 20 can be moved from the locked closed position S to the open pivoted position G by applying pressure to the two plates 42, wherein the pressure can be applied in a region in which the two plates 42 are hingedly connected to one another. After the pressure is removed, the two plates 42 move into the open position.

[0103] A first detailed view shows a hinge 46 in an enlarged view, with the two plates 42 arranged in the coplanar position K. A limiting element 50 is arranged centrally on a joint axis, which, in an assembled state, protrudes in the direction of the furniture body 41. The limiting element 50 can limit a bending movement of the two plates 42, when they are in the coplanar position K relative to one another, in the direction of a depth of the furniture body 41.

[0104] In the coplanar position K of the two plates 42, the limiting element 50 is slightly spaced from the furniture body 50, for example, approximately 3 mm.

[0105] The limiting element 50 prevents, on the one hand, excessive overpressure of the two plates 42 and, on the other hand, provides a defined triggering path for the ejection device 20.

[0106] A second detailed view shows the hinge 46 in an enlarged view, with the two plates 42 in an over-pressed position from a coplanar position K towards the furniture body 41.

[0107] If the two plates 42 are now pressed in, starting from the coplanar position K relative to one another, in the region of the axis connecting the two plates 42 to one another in the direction of the depth of the furniture body 41, the limiting element 50 strikes the furniture body 50 and thus prevents further bending movement of the two plates 42 in the direction of the depth of the furniture body 41.

[0108] In this way, a variably adjustable, defined trigger path for the ejection device 20 with a touch-latch function can also be provided, wherein the two plates 42 can be ejected by the ejection device 20 starting from the coplanar position K over a partial distance in the direction of the parallel position P.

[0109] Fig. 5a shows the ejection device 20, wherein one of the two levers 22 has fastening means 24 for fastening the ejection device 20 to the movable furniture part 2.

[0110] The second lever 22 has a free end 25, on which two rotatably mounted rolling elements 26 are arranged to support the lever 22 against a stop surface 27 (the second rolling element 26 is concealed by the first rolling element 26 due to the side view). A spacer 28 is arranged on this lever 22, wherein one spacer 28 can be arranged in different positions relative to the free end 25.

[0111] Fig. 5b shows the ejection device 20, wherein the ejection device 20 has a first part 29a of a locking device 30, which is operatively connected to a second part 29b of the locking device 30 arranged on the furniture body 41. The part 29a of the locking device 30 has a permanent magnet 31, and the other part 29b is partially metallic. The first part 29a of the locking device 30 is arranged on an outer side 32 of the ejection device 20.

[0112] Fig. 6a shows the furniture 40, wherein the ejection device 20 is in the unlocked push-through position D, since the two plates 42 are in the parallel position P.

[0113] The receiving shaft 43 arranged laterally of the furniture body 41 is intended to receive the furniture part 2 which can be moved in the parallel position P.

[0114] If the two plates 42 are pulled out of the receiving shaft 43, the ejection device 20 with the locking device 1 in the overpressure position U ends the parallel position P and the two plates 43 move into the spread-open position.

[0115] An ejection device 49 is provided for ejecting the two plates 42 from the receiving shaft 43.

[0116] Fig. 6b shows an enlarged section of Fig. 6a , wherein the ejection device 20 is in the push-through position D and the locking device 1 arranged on the ejection device 20 is in the over-pressing position U.

[0117] Fig. 7 shows the ejection device 20 in its individual components. The locking element 6 is a bent pin, but a bolt-shaped locking element 6 is also possible.

[0118] The energy accumulators 3 in the form of springs 35 are arranged on axes, wherein the axis of symmetry of one of the two axes defines the axis of rotation of the levers 22 of the ejection device 20.

[0119] The heart-shaped locking contour 4, the push-through recess 7 and the deflection contour 8 are arranged on a common base 12.

[0120] Fig. 8a shows an ejection device 20 according to a further embodiment, wherein the ejection device 20 is arranged between the furniture body 41 and the movable furniture part 2—consisting of two plates 42. A detailed section of the ejection device 20 with internal contours is shown on the right.

[0121] The ejection device 20 is in the closed position S, with the locking device 1 arranged on the ejection device 20 being in the locking position V. The two plates 42 are therefore in the coplanar position K.

[0122] Fig. 8b shows the ejection device 20 in the push-through position D, with the locking device 1 in the over-pressing position U.

[0123] Fig. 8c shows a position of the two plates 42 between the coplanar position K and the open position, wherein the rolling elements 26 are supported on the furniture body and one of the two levers 22 is connected to the movable furniture part 2 via fastening means 24.

[0124] Fig. 8d shows the open position of the movable furniture part 2, wherein the ejection device 20 arranged on the movable furniture part 2 is in the open pivot position G.

[0125] Fig. 9a shows the movable furniture part 2 in the lateral receiving shaft 43, wherein the two plates are in the parallel position P, the ejection device 20 is in the push-through position D and the locking device 1 is in the over-pressing position U.

[0126] Fig. 9b shows the position of the movable furniture part 2 in which the two plates 42 have been pulled out of the receiving shaft 43 and the ejection device 20 spreads the two plates 42 in the direction of the spread-open position, since the locking device 1 in the receiving shaft 43 is not in the locking position V.

[0127] Fig. 9c shows the position of the movable furniture part 2 in which the ejection device 20 is in the open pivot position G and is just in contact with both plates 42.

[0128] Fig. 10a shows the ejection device 20 in an enlarged view, wherein the locking device 1 and the internal components can be seen in the illustration.

[0129] Fig. 10b shows the ejection device 20, wherein a spreading element 33 is arranged between the two levers 22 and a further energy accumulator 34 is provided. The two levers 22 are subjected to force by the further energy accumulator 34 via the spreading element 33.

[0130] The energy accumulator 3 and the further energy accumulator 34 are designed in the form of springs 35, wherein the energy accumulator 3 is a leg spring and the further energy accumulator 34 is a spiral spring.

[0131] The additional energy storage device 34 is arranged between a stationary energy storage holder 36 and a relatively movable energy storage holder 37. The additional energy storage device 34 is arranged on a cross strut 38 connected to the expansion element 33, with the cross strut 38 simultaneously assuming the function of the movable energy storage holder 37. The cross strut 38 comprises two rolling elements 39 for movement along a lever 22. The expansion element 33 is articulated to the cross strut 38 and one of the levers 22.

[0132] The energy storage device 3 and the further energy storage device 34 can be charged by a movement of one of the two levers 22.

[0133] Fig. 11a shows the ejection device 20 in the open pivot position G and Fig. 11b shows the ejection device 20 in push-through position D.

[0134] Fig. 12a shows a piece of furniture with the movable furniture 2 in the coplanar position K.

[0135] Fig. 12b shows the furniture with a carriage 45, which can be moved along a horizontally arranged rail 44. The carriage 45 is coupled to one of the two plates 42. A hinge 46 is provided to connect the two plates 42 to each other in an articulated manner.

[0136] The carriage 45 can be lowered into the receiving shaft 43 together with the movable furniture part 2. During movement along the rail 44, the carriage 45 is supported by a guide roller 47 on a guide 48. The movement of the expansion element 33 can be locked by means of the carriage 45.

[0137] Fig. 12c differs from Fig. 12b in that a side wall of the receiving shaft 43 and one of the two plates 42 have been removed for the sake of clarity in order to reveal the ejection device 20 and the structural design.

[0138] Fig. 13 shows the ejection device 20 according to the Fig. 8a The embodiment shown is disassembled into its individual components. The locking element 6 is bolt-shaped in this embodiment.

[0139] The locking device 1 according to this embodiment is designed mirror-symmetrically, with two heart-curve-shaped locking contours 4, two deflection contours 8, two inlet openings 11, two push-through recesses 7 and two bypass channels 10 being present.

[0140] Fig. 14a shows the ejection device 20 in the closed position S with internal component contours and an enlarged detail of the locking device 1. The locking device 1 is in the locking position V .

[0141] Fig. 14b shows the ejection device 20 with the locking device 1 in release position F.

[0142] Fig. 15 shows a torque curve of an ejection device 20 with two further energy accumulators 34 in the form of two springs 35 (coil springs), which are coupled to the two spreading elements 33 (see for example Fig. 11a ), and two energy accumulators 3 in the form of two springs 35 (leg springs), which are arranged on a joint axis .

[0143] Since the ejection device 20 has a symmetrical design, the moment curve shows the forces acting on a spreading element 33, caused by a coil spring and a leg spring. The consideration is not limited to an additional force accumulator 34 in the form of a coil spring and force accumulator 3 in the form of a leg spring.

[0144] The abscissa gives an angle β in degrees between the two levers 22 an,which is caused by a movement of the expansion element 33. The ordinate indicates an acting moment in Nm, which acts on the lever 22 via the expansion element 7.

[0145] A characteristic curve with rectangular data points describes the acting moment caused by the hairspring, and a characteristic curve with light, circular data points describes the acting moment caused by the torsion spring. A characteristic curve with dark, circular data points describes the sum of the two underlying characteristic curves and indicates the moment on lever 22 varying over the angle β.

[0146] In the coplanar position K and essentially in the parallel position P, no moment caused by the coil spring acts on the lever 22. Between the coplanar position K and the open position, as well as between the parallel position P and the spread position, a decreasing moment of the leg spring partially compensates for an increasing moment of the coil spring, thereby generating a harmonious moment curve on the lever 22.

[0147] Furthermore, in the closed position S of the ejection device 20, due to the small angle β between the spiral spring and the lever 22, essentially no moment of the spring 35 acts on the spreading element 33 and the lever 22. This ensures a gentle opening of the movable furniture part 2 by the ejection device 20 from the coplanar position K and a gentle spreading from the parallel position P, since the lever 22 is not subjected to a sudden force by the spring 35. List of reference symbols:

[0148] Locking device (1) Furniture part (2) Energy storage device (3) Locking contour (4) Heart-shaped recess (5) Locking element (6) Push-through recess (7) Deflector contour (8) Deflector bevel (9) Bypass channel (10) Inlet opening (11) Base (12) Ejection device (20) Component (21) Lever (22) Angle (23) Fastener (24) End (25) Rolling element (26) Stop surface (27) Spacer (28) First part (29a) Second part (29b) Locking device (30) Permanent magnet (31) Outer side (32) Spreading element (33) Additional energy storage device (34) Spring (35) Fixed energy storage device holder (36) Movable energy storage device holder (37) Cross brace (38) Rolling element (39) Furniture (40) Furniture body (41) Panels (42) Receiving shaft (43) Rail (44) Carriage (45) Hinge (46) Guide roller (47) Guide (48) Ejection device (49) Limiting element (50) Locking position (V) Overpressure position (U) Release position (F) Open pivot position (G) Closed position (S) Push-through position (D) Coplanar position (K)Parallel position (P)

Claims

1. Locking device (1) for the releasable locking of two furniture parts (2) which are movable relative to one another against the force of a force accumulator (3), comprising a heart-shaped locking contour (4) with, preferably precisely, a heart-shaped recess (5) and at least one locking element (6) which is movable relative to the heart-shaped locking contour (4), in particular a bolt-shaped locking element (6), which can be arranged in a locking position (V) in the heart-shaped recess (5) of the heart-shaped locking contour (4), wherein the at least one locking element (6) can be moved from the locking position (V) into an overpressure position (U) from the heart-shaped recess (5) into a release position (F), characterized in thatthe locking device (1) has a push-through recess (7) which is separate from the heart recess (5), in which the at least one locking element (6) can be arranged, and at least one deflection contour (8) which blocks a movement of the at least one locking element (6) from the push-through recess (7) into the heart recess (5), wherein it is preferably provided that the heart recess (5) is spatially separated from the deflection contour (8) and / or is designed in the form of a separate structure.

2. Locking device (1) according to claim 1, wherein the at least one deflection contour (8) has at least one deflection bevel (9) with which the at least one locking element (6) can be urged in the direction of the release position (F) starting from an arrangement in the push-through recess (7).

3. Locking device (1) according to claim 1 or 2, wherein the locking device (1) has at least one bypass channel (10) through which the at least one locking element (6) can be moved past the heart recess (5) into the push-through recess (7).

4. Locking device (1) according to one of claims 1 to 3, wherein the locking device (1) has at least one inlet opening (11) for the at least one locking element (6) and the heart-curved locking contour (4) and the at least one deflection contour (8) are arranged between the at least one inlet opening (11) and the push-through recess (7).

5. Locking device (1) according to one of claims 1 to 4, wherein at least the heart-shaped locking contour (4), the push-through recess (7) and the at least one deflection contour (8) are arranged on a common base (12).

6. Locking device (1) according to one of claims 1 to 5, wherein the at least one locking element (6) is arranged on one, preferably at least two levers (22) which can be pivoted relative to one another.

7. Ejection device (20) for a movable furniture part (2), comprising at least two components (21) movable relative to one another and at least one energy accumulator (3) acting between the at least two components (21), characterized in that the ejection device (20) has at least one locking device (1) according to one of claims 1 to 5, wherein the heart-curved locking contour (4) is arranged on one and the at least one locking element (6) is arranged on the other of the at least two components (21) which are movable relative to one another.

8. Ejection device (20) for a movable furniture part (2), comprising at least two levers (22) pivotable relative to one another, at least one energy accumulator (3) which, in a loaded state, applies a force to the at least two levers (22) in the direction of an open pivot position (G), and at least one locking device (1) for releasably locking the at least two levers (22) in a closed position (S) against the force of the loaded energy accumulator (3), characterized in thatthe at least one locking device (1) is designed such that the at least two levers (22) are freely movable relative to one another in an unlocked state in a push-through position (D), in which the levers (22) enclose an angle (23) which is smaller than the angle (23) of the levers (22) in the closed position (S), wherein the at least one locking device (1) is designed according to one of claims 1 to 5, wherein the heart-curved locking contour (4) is arranged on one of the at least two levers (22) which can be pivoted relative to one another and the at least one locking element (6) is arranged on the other of the at least two levers (22) which can be pivoted relative to one another.

9. Ejection device (20) according to claim 8, wherein - one of the at least two levers (22) has fastening means (24) for fastening the ejection device (20) to the movable furniture part (2), and / or - one of the at least two levers (22) has a free end (25) on which at least one rotatably mounted rolling body (26) for supporting the lever (22) on a stop surface (27), and / or - one of the at least two levers (22) has a free end (25) on which at least one spacer (28) is arranged, preferably wherein the at least one spacer (28) can be arranged in different positions relative to the free end (25).

10. Ejection device (20) according to claim 8 or 9, wherein the ejection device (20) has a first part (29a) of a locking device (30) which can be brought into operative connection with a second part (29b) of the locking device (30) which can be arranged on a piece of furniture (40), preferably - wherein one of the two parts (29a, 29b) of the locking device (30) has a permanent magnet (31) and the other of the two parts (29a, 29b) is formed metallically at least in regions, and / or - the first part (29a) of the locking device (30) is arranged on an outer side (32) of the ejection device (20).

11. Ejection device (20) according to one of claims 8 to 10, wherein at least one spreading element (33) is arranged between the at least two levers (22) and at least one further energy accumulator (34) is provided, wherein the at least two levers (22) can be subjected to force by the at least one further energy accumulator (34) via the at least one spreading element (33), wherein it is preferably provided that - the at least one energy accumulator (3) and / or the at least one further energy accumulator (34) is designed in the form of at least one spring (35) and / or - the at least one further energy accumulator (34) is arranged between a stationary energy accumulator holder (36) and a force accumulator holder (37) movable relative thereto and / or the at least one further energy accumulator (34) is arranged on at least one cross strut (38) connected to the at least one spreading element (33),preferably wherein the at least one cross strut (38) comprises at least one rolling element (39) for movement along one of the at least two levers (22), and / or - the at least one spreading element (33) is articulated to the at least one cross strut (38) and / or one of the at least two levers (22) and / or - the at least one energy accumulator (3) and / or the at least one further energy accumulator (34) can be charged by a movement of at least one of the at least two levers (22).

12. Furniture (40) with a furniture body (41) and at least one furniture part (2) movable relative to the furniture body (41), characterized in that the piece of furniture (40) has at least one ejection device (20) according to claims 7 to 11.

13. Furniture (40) according to claim 12, wherein - the at least one movable furniture part (2) has at least two plates (42) which are articulated to one another and which are movable between a coplanar position (K), in which the at least two plates (42) are arranged substantially in the same plane, and a parallel position (P), in which the at least two plates (42) are arranged substantially parallel to one another, - the at least one ejection device (20) is designed according to one of claims 8 to 16 and is arranged on one of the at least two plates (42), and - the at least two levers (22) are arranged in the locked closed position (S) when the at least two plates (42) are in the coplanar position (K), and in the unlocked push-through position (D) when the at least two plates (42) are in the parallel position (P).

14. Furniture (40) according to claim 12 or 13, wherein - at least one receiving shaft (43), preferably arranged laterally of the furniture body (41), is provided for receiving the at least one movable furniture part (2) arranged in the parallel position (P) of the at least two plates (42), and / or - the at least one ejection device (20) can be transferred from the locked closed position (S) into the open pivoted position (G) by exerting pressure on the at least two plates (42), wherein it is preferably provided that the pressure is exerted in a region in which the at least two plates (42) are hingedly connected to one another, and / or - at least one movable carriage (45), preferably along at least one horizontally arranged rail (44), is provided, which carriage can be coupled to one of the at least two plates (42), preferably by means of at least one hinge (46). is, preferably provided is,that the at least one carriage (45) can be lowered together with the movable furniture part (2) into the at least one receiving shaft (43) is, and / or the carriage (45) is supported on a guide (48) via at least one guide roller (47) during a movement along the at least one rail (44) and / or a movement of the at least one expansion element (33) can be blocked by means of the at least one carriage (45) is.

15. Furniture (40) according to one of claims 12 to 14, wherein at least one ejection device (49) is provided for ejecting the at least two plates (42) from the at least one receiving shaft (43) is.

Images