CN114126451A

CN114126451A - Ejection device for movable furniture parts

Info

Publication number: CN114126451A
Application number: CN202080047635.0A
Authority: CN
Inventors: S·克劳斯; K·克罗克
Original assignee: Paul Hettich GmbH and Co KG
Current assignee: Paul Hettich GmbH and Co KG
Priority date: 2019-06-28
Filing date: 2020-06-04
Publication date: 2022-03-01
Also published as: DE102019117593A1; EP3989774A1; WO2020259976A1

Abstract

An ejection device (8) for a movable furniture part, in particular for a drawer (3) or a door, comprises a drive element (10), the driver element is movable between two end positions along a guide track (11) formed on the housing (9), wherein at an angled end portion (28) of the guide track (11) the driver element (10) is preloaded into a first end position by means of an energy accumulator (18), and the driver element (10) can be coupled to the activation section (7) when moving along the guide track (11), wherein the coupling of the driver element (10) with the activation portion (7) is releasable upon movement into the angled end portion (28), and wherein a locking mechanism is provided, by means of which the driver element (10) can be locked in the second end position with the energy accumulator (18) loaded. The locking mechanism can be released at least by moving the driver element (10) in a direction against the force of the energy accumulator (18), wherein the driver element (10) is fixed in the end position at the angled end portion (28) by means of at least one fixing element (14, 25) integrally formed with the housing (9) in order to prevent lifting from the housing (9) orthogonal or nearly orthogonal to the direction of movement of the driver element (10).

Description

Ejection device for movable furniture parts

Technical Field

The invention relates to an ejection device for a movable furniture part, in particular for a drawer or a door, comprising a driver element which can be moved along a guide track formed on a housing between two end positions, wherein at an angled end portion of the guide track the driver element is preloaded by means of an energy accumulator into a first end position and the driver element can be coupled to an activation portion during movement along the guide track, wherein the coupling of the driver element with the activation portion can be released during movement into the angled end portion, and a latching mechanism is provided by means of which the driver element can be latched with the loaded energy accumulator in a second end position, wherein the latching mechanism can be released at least by moving the driver element in a direction against the force of the energy accumulator.

Background

EP 2445376B 1 discloses a self-retracting device for a pull-out guide, in which a driver element is movable along a link guide on a housing. The driver element is guided by a guide web on the link guide and engages around the guide web on the housing with a clamping lug. The link guide has an angled end portion to separate the driver element from the activation portion and to secure the driver element to the angled end portion with the charged accumulator. From this position, the accumulator may then pull the driver element to the closed position. A maximum force is generated in such a self-retracting device when the activation part strikes the driver element and pivots away from the parking position. The driver element is thus secured in this region by the clamping lug against being lifted from the housing. However, the force generated by the self-retracting device is not comparable to an ejection device in which the driver element is preloaded in the opposite direction (i.e. towards the angled end portion).

EP 2266437B 1 discloses an opening device for a pull-out guide, in which a driver element is movable on a guide housing and comprises guide elements on opposite sides, which engage in two guide tracks. However, guiding the driver element on both sides makes it difficult for the activation portion to access the driver element. Furthermore, the assembly of the driver element and the ejector is more complicated, since the driver element cannot simply be placed on the guide track.

Disclosure of Invention

It is therefore an object of the present invention to provide an ejection device for a movable furniture part, which ejection device is easy to assemble and ensures a firm fixation of the driver element to the guide track.

This object is solved by an ejection device having the features of claim 1.

In the ejection device according to the invention, the driver element is movable between two end positions on the guide track, wherein the driver element is fixed in the end positions at the angled end portions of the guide track by at least one fixing member which is integrally formed with the housing, in order to prevent lifting from the housing orthogonally or nearly orthogonally to the direction of movement of the driver element. The driver element can thus be held securely in this end position on the housing and the guide rail, even if the driver element is loaded via an energy accumulator which, without being fixed by a fixing member, can lever the driver element from the guide rail by a tilting or pivoting movement. The driver element is thus at least firmly held on the housing despite the preloading by the energy accumulator.

Preferably, the actuator element is secured to the housing by at least two spaced apart securing members to prevent the actuator element from lifting from the housing. In this case, the driver element is mainly held firmly on the fixing member. Particularly preferably, the securing member is designed to engage a projection over a contact surface formed on the driver element. Thereby, the two protrusions may engage on different sides, in particular on opposite sides, of the driver element to fix the driver element against lifting. Alternatively, the securing member on the housing may be formed as a recess, gap or cavity in which a corresponding protrusion on the driver element securely engages.

In an advantageous embodiment, a guide ramp is formed on the driver element and/or on at least one projection on the housing, which ramp presses the driver element against the housing in the first end position. Thus, the guide ramp can serve to preload the driver element towards the housing and even better secure the driver element against lifting from the housing. The guide ramps may be formed on only one or more of the protrusions, only one of the contact surfaces of the driver element, or both.

The driver element is preferably of plate-like design and is provided on one side with at least one guide element which engages in the guide track. On the opposite side, a receptacle is provided for engaging the activation portion. The driver element can thus be easily mounted on the guide rail by inserting the at least one guide element into the guide rail, which can be achieved by a linear pushing movement. In this connection, the guide track may be trough-shaped or slot-shaped, and preferably two pin-shaped guide elements on the driver element engage in the guide track. Thus, the driver element may pivot in a predetermined path when encountering the angled end portion, in order to separate the activation portion from the driver element. The driver element is preferably integrally formed, but may also be composed of multiple parts.

A guide web is preferably formed on the housing at a distance from the guide track, which guide web is surrounded by the guide portion of the driver element. In this case, the profile development of the guide web follows the profile development of the guide track, thereby forming a linear section and a subsequent angled end portion. The guide portion may engage around the guide web in a U-shaped manner in order to secure the driver element against lifting from the guide track. In this case, the U-shaped looping of the guide web need not take place in a single plane perpendicular to the direction of travel of the driver element, but can take place by means of different sections arranged offset from one another in the direction of travel of the driver element. This facilitates manufacture and assembly of the driver element. Furthermore, at least one recess for mounting the driver element may be provided on the guide web, which recess is arranged in a central region of the travel path of the driver element. This also allows the driver element to be easily mounted to the housing in an automated process.

Preferably, at least one of the protrusions formed on the housing is arranged in extension of the linear portion of the guide web.

In a further design, the ejection device has a latching mechanism which comprises a control element which is connected to the driver element and is guided in a control cam having a latching receptacle. Such control cams are known per se and are also referred to as heart cams, since the annular section of the cam guide is formed into a heart shape and the control element can be latched to the latch receptacle in this section. For a space-saving design, the control element may comprise a bending line which is connected to the driver element on one side and is guided with a bent end section in the control cam on the opposite side. Thereby, the control cam for the latch mechanism may be formed on a cover which is fixed to the housing, e.g. via a latch connection. In this way the ejector can be manufactured in only a few parts. Furthermore, in addition to forming the control cam, the cover may also cover other components, such as accumulators, synchronizing members, etc., and protect them from being accessed.

Preferably, the energy accumulator of the ejection device is connected to the driver element via a plunger, wherein the contact surface of the driver element for engaging with the protrusion is arranged on the housing when the driver element is arranged on the linear portion of the guide track. This ensures that the forces introduced by the energy accumulator into the driver element can be introduced into the housing substantially via the contact surfaces and the projections.

The ejection device according to the invention is particularly intended for furniture or household appliances comprising a movable furniture part, such as a drawer. However, the ejection device can also be used for sliding doors, pivoting doors or other movable furniture parts, wherein the movable furniture parts within the meaning of the present application can also be part of a household appliance.

Drawings

The invention is explained in more detail below by means of exemplary embodiments with reference to the drawings, in which:

FIG. 1 shows a perspective view of a piece of furniture;

FIG. 2 shows a view of the furniture of FIG. 1 without the drawer;

fig. 3 shows a view of the pull-out guide of the furniture of fig. 2 with an ejection device;

FIG. 4 shows a view of the ejection device of FIG. 3 without the pull-out guide;

FIG. 5 shows a view of the ejection device of FIG. 4 in an open state;

FIG. 6 shows a view of the ejector of FIG. 5, with the cover rotated;

FIG. 7 shows a detailed view of the drive element of the ejector in the end position;

8A-8C show several views in partial cross-section of the ejector of FIG. 4;

FIG. 9 shows a view of the ejector without the driver element;

FIG. 10 shows a view of the ejection device of FIG. 9 with a driver element, and

fig. 11 shows a view of the ejector of fig. 10 with the cover removed.

Detailed Description

The piece of furniture 1 comprises a furniture body 2 on which a plurality of drawers 3 can be moved. For this purpose, a pull-out guide 4 is provided in the furniture carcass 2, which is fixed to the furniture carcass 2 by means of an angled holder 5 and has a movable rail 6 for moving the drawer 3 (fig. 2).

Fixed to the movable rail 6 is an activation portion 7 in the form of a protrusion which is engageable with a driver element of the ejector device 8. Such an ejector can be locked in a substantially closed position of the drawer 3. To unlock the ejection device, the drawer 3 is then pressed into the furniture carcass 2 against the force of the energy store into an overpressure position in order to unlock the latching mechanism, so that after unlocking the drawer 3 can be ejected in the opening direction by the force of the energy store.

In fig. 3, the pull-out guide 4 is shown with the housing 9 of the ejector 8 fixed to the holder 5. The activation portion 7 protruding from the movable rail 6 is coupled to a driver element 10, which is movable along a guide track on the housing 9. Such ejectors 8 may also be coupled or synchronized with each other such that when one is unlocked, the other is unlocked simultaneously or with a time delay. Such a synchronization device is shown, for example, in DE 102016113577, to which reference is made here and which can also be used with the present ejection device.

In fig. 4, the ejector 8 is shown without the pull-out guide 4. The ejection device 8 comprises a substantially tray-shaped housing on which a groove-shaped guide track 11 is formed, in which one or more guide elements of the movable driver element 10 engage. The driver element 10 comprises a receptacle 12 with stops on opposite sides and in which the projections of the activation portion 7 can engage, so that the driver element 10 can only be moved together with and coupled to the activation portion 7. Thereby, the driver element 10 is preloaded by the energy accumulator in a first end position on the guide track 11, wherein the energy accumulator acts on the driver element 10 via the plunger 15. In the opposite second end position with the accumulator charged, the driver element 10 can be latched via the control element 16.

In fig. 5, the ejector is shown with the cover 17 removed covering a part of the housing 9. It can be seen that an energy accumulator 18 in the form of a compression spring is fixed to the housing 9, supported on the housing 9 on one side and on the web of the plunger 15 on the opposite side, to preload the plunger 15 towards the driver element 10. The driver element 10 is located at the angled end portion of the guide track 11 and is firmly fixed to the housing 9 by two

protrusions

14 and 25 serving as fixing members and is fixed against lifting.

As shown in fig. 6 and 7, the control element 16 is connected to the driver element 10, wherein the control element 16 is made of a bent wire and engages on one side via a hook 24 through a hole in the driver element 10. On the opposite side, the control element 16 has a curved end portion 60 which engages and is movable in the control cam 19 on the cover 17. The control cam 19 is in the form of a "heart cam" and has a latching receptacle, wherein an end portion 60 of the control element 16 can latch when the energy accumulator 18 is loaded, i.e. when the driver element 10 is in a second end position opposite the angled end portion. Such latching of the control element 16 can be unlocked by gently pushing the driver element 10 against the force of the energy accumulator 18 and then being ejected by the energy accumulator 18. The control cam 19 is formed integrally with the cover 17, which is preferably connected to the housing 9 by a latch. Alternatively, the control cam 19 may be formed on the housing 9.

The driver element 10 has been placed or inserted on the guide track 11 of the housing 9 and, in a first end position, is fixed at the angled end portion to prevent lifting from the housing 9. For this purpose, the first projection 14 is formed integrally with the housing 9, which forms a stop for the contact surface 13 formed in an inclined manner on the driver element 10. The contact surface 13 is formed as a guide ramp, so that the driver element 10 is not only blocked by the loading of the energy accumulator 18, but also pressed against the housing 9 by the inclined arrangement of the contact surface 13.

Spaced from the projection 14, a further projection 25 is formed on the housing 9, which projection projects towards the driver element 10 and engages over a web 26 formed on the opposite side of the contact surface 13. The projection 25 prevents the web 26 from being lifted.

The driver element 10 is also held to the housing 9 by a guide web 20, wherein the guide web 20 is engaged on the driver element 10 by lugs 22 on the underside and on the driver element 10 by two guide portions 23 on the top. The guide webs 20 are therefore enclosed in a U-shape by the shaping of the driver element 10, wherein the engagement above and below does not take place in a single plane in the direction of travel, but rather are offset from one another in the direction of travel. However, this secures the driver element 10 against lifting from the housing and leads to an improved guidance.

In fig. 8A to 8C, various details of the housing 9 and the driver element 10 are shown. It can be seen that the control element 16 and the plunger 15 are located on opposite sides of the guide track 11. The driver element 10 is located at an angled end portion of a guide track 11 having a linear portion adjacent to the angled end portion. The profile extent of the guide web 20 corresponds in its longitudinal extent to the profile extent of the guide rail 11, so that here too a linear section and an angled end section are formed. As is shown in particular in fig. 8A and 10, in a preferred embodiment variant, the projection 14 is arranged on the housing 9 in the extension of the linear section of the guide web 20. Furthermore, the guide web 20 comprises a recess 21 in the central region of the travel path of the driver element 10, which facilitates assembly and disassembly, since the driver element 10 can be easily fitted to the housing 9 in the region of the recess 21.

In fig. 8B, the guide web 20 is shown as a U-shape formed by the lugs 22 and the guide portions 23. Furthermore, a channel-shaped guide track 11 is shown, wherein a pin-shaped guide element 27 is partially visible on the driver element 10. Two spaced apart guide elements 27 are formed on the driver element 10.

A projecting hook 90 is also formed on the housing 9, by which the housing 9 can be mounted on another member (such as a guide rail of the pull-out guide 4).

As shown in fig. 8C, at the end of the plunger 15 there is a spherical head portion 29 which is arranged in a joint receptacle on the driver element 10. This allows the driver element 10 to rotate relative to the plunger 15 when it reaches the angled end portion of the guide track 11. Furthermore, it can be seen that the contact surface 13 on the driver element 10 is inclined and cooperates with a stop surface (which is also inclined) on the protrusion 14, so that the driver element 10 is preloaded towards the housing 9 by the force of the plunger 15. In this case, when the driver element 10 is arranged on a linear portion of the guide track 11, the contact surface 13 is in the extension of the plunger 15 and thus in the direction of action of the energy accumulator. Even in the angled position, a part of the force of the energy accumulator can thus be transmitted to the housing 9 through the projection 14 and the contact surface 13. Thereby, a major part of the force is transmitted via the guide element 27. Therefore, a smaller force acts on the other projection 25 even if this prevents pivoting or tilting of the driver element 10.

In fig. 9, the housing 9 of the ejector 8 is shown without the driver element 10. It can be seen that the guide track 11 is linear in design and has an angled end portion 28 at one end only. The guide web 20 extends parallel to the guide rail 11, as already described, and can be fitted perpendicular to the plane of the guide rail 11, and merely additionally has a recess 21 for mounting the driver element 10.

In fig. 10, the driver element 10 is additionally shown connected to a control element 16 and a plunger 15. The

projections

25 and 14 partially overlap the driver element 10.

In fig. 11, the ejection device is shown with the cover 17 removed and rotated so that the control cam 19 is visible on the cover 17. The control cam 19 serves for guiding the control element 16, wherein a latch receptacle for latching the control element 16 is formed on the control cam 19. The latch receptacle may be formed of several pieces with a portion of the latch receptacle being preloaded to an initial position by a spring 30. This may provide an additional securing function to unlock the end portion 60 from the latch receptacle in a different manner (e.g., a synchronized manner).

In the exemplary embodiment shown, an ejection device 8 is provided on the pull-out guide 4 to hold the drawer 3 to the furniture carcass 2 via a push-open fitting. The ejection device can also be used for other drawer elements, such as sliding doors, or for pivotable doors or flap doors.

List of reference numerals

1 furniture

2 furniture main body

3 drawer

4 pull-out guide

5 holder

6 guide rail

7 activation part

8 ejecting device

9 casing

10 driver element

11 guide rail

12 receptacle

13 contact surface

14 projecting part

15 plunger

16 control element

17 cover

18 energy accumulator

19 control cam

20 guide web

21 recessed part

22 lug

23 guide part

24 hook

25 projecting part

26 Web plate

27 guide element

28 end portion

29 head portion

30 spring

60 end portion

90 hooks.

Claims

1. Ejection device (8) for a movable furniture part, in particular a drawer (3) or a door, comprising a driver element (10) which can be moved along a guide track (11) formed on a housing (9) between two end positions, wherein at an angled end portion (28) of the guide track (11) the driver element (10) is preloaded by an energy accumulator (18) into a first end position and the driver element (10) can be coupled to an activation portion (7) during movement along the guide track (11), wherein the coupling of the driver element (10) with the activation portion (7) can be released during movement into the angled end portion (28) and a latching mechanism is provided by means of which the driver element (10) can be latched with the loaded energy accumulator (18) in a second end position, wherein the latch mechanism can be released at least by moving the driver element (10) in a direction against the force of the energy accumulator (18), characterized in that the driver element (10) is fixed in the end position at the angled end portion (28) by means of at least one fixing member (14, 25) which is integrally formed with the housing (9) in order to be prevented from lifting from the housing (9) almost orthogonally to the direction of movement of the driver element (10).

2. Ejection device according to claim 1, wherein said driver element (10) is fixed in said end position at said angled end portion (28) by at least two fixing means (14, 25) integrally formed with said housing (9) and arranged spaced apart from each other, so as to be prevented from being lifted from said housing (9) orthogonally or almost orthogonally to said movement direction of said driver element (10).

3. Ejection device according to claim 1 or 2, wherein said fixing member (14, 25) cooperates with said driver element (10) in a form-fitting manner.

4. Ejection device according to one of the preceding claims, wherein said fixing member (14, 25) is formed as a protrusion.

5. Ejection device according to one of the preceding claims, wherein a guiding ramp is formed on said at least one projection (14, 25) on said driver element (10) and/or on said housing (9), said guiding ramp pushing said driver element (10) towards said housing (9) in said first end position.

6. Ejection device according to one of the preceding claims, wherein said driver element (10) is substantially plate-shaped and has, on one side, at least one guide element (27) engaged in said guide track (11) and, on the other side, a receptacle (12) for engaging said activation portion (7).

7. Ejection device according to one of the preceding claims, wherein said guide track (11) on said housing (9) is groove-like and at least one guide element (27) of said driver element (10) engages in said guide track (11).

8. Ejection device according to one of the preceding claims, wherein a guide web (20) is formed on the housing (9) at a distance from the guide track (11) and is surrounded by a guide portion on the driver element (10).

9. Ejection device according to claim 8, wherein said guide web (20) comprises a recess (21) for mounting said driver element (10), said recess being arranged in a central region of the travel path of said driver element (10).

10. Ejection device according to one of the preceding claims, wherein at least one fixing member (14) is arranged in the extension of a linear portion of said guide web (20).

11. Ejection device according to one of the preceding claims, wherein said latch mechanism comprises a control element (16) connected to said driver element (10) and guided in a control cam (19) having a latch receptacle.

12. Ejection device according to claim 11, characterized in that the control element comprises a bending wire which is connected to the driver element (10) on one side and is guided in the control cam (19) in a bent section on the opposite side.

13. Ejection device according to claim 11 or 12, wherein said control cam (19) is formed on a cover (17) fixed to said housing (9).

14. Ejection device according to one of the preceding claims, wherein said accumulator (18) is connected to said driver element (10) via a plunger (15), and wherein a contact surface of said driver element (10) for engagement with a protrusion (14) of said housing (9) is arranged in the extension of said plunger (15) when said driver element (10) is located at a linear portion of said guide track (11).

15. Furniture or household appliance having a movable furniture part which can be ejected by an ejection device (8) according to one of the preceding claims.