RU2785338C2 - Servo-mechanism for furniture leaf - Google Patents

Abstract

FIELD: furniture.

SUBSTANCE: servo-mechanism for sliding doors of a piece of furniture is disclosed. It contains two parallel horizontal linear guide rails (20), two carriages (26) respectively installed with the possibility of sliding on linear guide rails (20) to support a leaf with the possibility of sliding, a hinge parallelogram formed by vertical beam (40) connected to two carriages and installed to support and move a door and two equal arms (50) turned to a side panel of the piece of furniture, cam (54) made as a single whole with the arm, movable slider (56) displaced in a direction of the cam with an elastic element so that to press on the cam and rotate the arm. At the same time, the claimed servo-mechanism contains eddy current magnetic damper (80) for door damping. Moreover, the magnetic damper contains a linear guide rail, in which skid (80) is installed as a single whole with the door, with the possibility of sliding, wherein the linear guide rail contained in the magnetic damper and/or the skid containing magnetic flux generators (88) and, respectively, the skid and/or the linear guide rail contained in the magnetic damper contains metal track (70), on which a magnetic field generated by magnetic flux generators can impact and can slide along it. In this case, the linear guide rail contained in the magnetic damper is built in one of two parallel linear guide rails, in which two carriages are installed. Eddy current magnetic damper (80) for door damping is used for braking two carriages (26) installed with the possibility of sliding on linear guide rails (20) to support the door to provide sliding.

EFFECT: obtainment of a servo-mechanism for sliding doors of a piece of furniture.

14 cl, 8 dwg

Description

The invention relates to a servomechanism for sliding furniture doors.

Sliding furniture doors are generally supported by carriages with wheels rolling on linear tracks to make the doors move with little friction. The system is shown in US 9057216. Here, the mechanism is provided with two linear guides on which two carriages connected by a vertical beam respectively slide to support and move the door. The carriages move with the help of an articulated parallelogram, the vertical beam of which forms one side, and the two sides of the parallelogram are connected by two equal arms. The shoulders are made in one piece with the cam, which is driven by the pressure of the slider pushed by the springs. Depending on the size of the door, i.e. the mass to be moved, it is necessary to determine the number and/or size of the springs, unfortunately with limited standardization.

To brake and ensure that the door reaches the end of its stroke during the closing movement, a hydrodynamic piston or shock absorber is provided, which however does not provide smooth (and silent) braking and tends to be damaged as it absorbs all the kinetic energy of the door in a very short time. a short time.

The improvement of this state of the art is the main object of the invention, which is defined in the appended claims, in which dependent claims define preferred embodiments.

Another objective is to provide a servo mechanism for moving a furniture door that is durable.

Another object is to provide a servo mechanism for moving a furniture door, which brakes the door gradually and without kickback.

The servomechanism for moving the door of a piece of furniture contains:

two parallel and horizontal linear guides,

two carriages respectively slidably mounted, for example by means of wheels, on linear guides to support the door slidably,

an articulated parallelogram formed by a vertical beam connected to two carriages and installed to support and move the door, and two equal arms turned towards the side panel of the piece of furniture,

cam, made in one piece with the shoulder,

a movable slider displaced towards the cam by an elastic element in such a way as to push the cam and rotate the lever,

eddy current magnetic damper for door damping.

The magnetic damper uses parasitic currents caused by an alternating magnetic field inside an electrically conductive material. The induced eddy currents, in turn, generate a magnetic field opposite to the polarity of the inducing field, so that the two fields attract each other and develop a braking effect.

The eddy current magnetic damper has many advantages:

- it creates a braking force that acts throughout the entire stroke of the door, thereby increasing the dynamic control of the doors;

- it produces a braking force similar to viscous friction, i.e. a braking force proportional to the speed of the door. This ensures smoother and more uniform braking;

- Compared to US 9057216, it allows the use of the same spring for doors of different sizes, because it compensates for a spring that is too large for a small door and vice versa;

- it eliminates the noise that occurs when engaging and releasing the hydrodynamic shock absorber, i.e. it is silent.

Said two arms can be pivoted on a vertical beam, which in turn is hinged to the side panel of the piece of furniture. The vertical beam can be connected with the cam to close the parallelogram with more structural stability.

The magnetic north south poles are labeled N or S below.

In a preferred embodiment, the magnetic damper comprises a linear guide in which a skid is slidably mounted in one piece with the leaf. The linear guide and/or the skid contains permanent magnets and, accordingly, the skid and/or the linear guide contains a metal track that the magnetic field generated by the permanent magnets can act on and slide along.

The metal track may consist of, for example, aluminium, copper and high carbon steel.

In a more preferred embodiment, said magnetic damper linear guide is integrated into one of said two linear parallel guides for less volume. In particular, said linear guide of the magnetic damper and said one of the two parallel linear guides consist of one sectional beam, for example made of aluminium, copper or high carbon steel.

The specified single sectional beam preferably contains a channel for the wheel of one of the said carriages.

Preferably, said single sectional beam or said guide comprises or consists of two coplanar cantilever ribs, on two opposite flat sides of which a sliding skid containing permanent magnets is mounted.

In a preferred embodiment of the skid, it comprises two flat and parallel elements spaced apart and positioned so that they can slide, with coplanar ribs held between them, each flat element having permanent magnets.

In an even more preferred embodiment of the frame, each of the two flat and parallel members comprises a low carbon steel plate on which permanent magnets are mounted.

Preferably, the permanent magnets have a polar axis orthogonal to the surface of the track or rib.

Preferably, each flat element contains a number of permanent magnets aligned along the length of the track or one or each rib. These two rows, parallel and belonging to another planar element, are mirrored (i.e., one faces the other) with respect to the track or edge. That is, for one or each rib, there are two parallel rows of permanent magnets that are mounted on opposite sides of the track or rib.

In particular, each flat element may comprise two or more parallel rows of magnets arranged such that there is a row of magnets on each opposite side of the track or rib.

Preferably all permanent magnets of one or each row have N-S polar axes parallel to each other. Even more preferably, the polar axis NS/SN of each permanent magnet belonging to a row located along one side of the track or rib coincides with the polar axis NS/SN of the permanent magnet of the row located on the opposite side of the track or rib.

Preferably, the permanent magnets of one or each row are oriented to have an N-S polar axis with an alternate orientation, i.e., assuming the reference direction, if one magnet in the row has poles in N-S order, the next in the row will have S-N order, and so on.

It will be understood that other types of magnetic flux generators, such as, for example, powered solenoids, can also be used instead of the aforementioned permanent magnets.

The advantages of the invention will become more apparent from the following description of a preferred example of a servo mechanism, given with reference to the accompanying drawing, in which:

- in Fig. 1 is a three-dimensional view of a servo mounted on a piece of furniture;

- in Fig. 2 shows an enlargement of FIG. one;

- in Fig. 3 shows the individual components of FIG. 2;

- in Fig. 4 shows a simplified side view of a sectional beam;

- in Fig. 5 is a sectional view along plane V-V;

- in Fig. 6 is a sectional view along plane VI-VI;

- in Fig. 7 is an enlarged view of FIG. 5,

- in Fig. 8 is an enlarged view of FIG. 6.

In the drawings, like numbers designate like or conceptually similar parts, and elements are described as they are used. To simplify the drawings, some reference numbers have been omitted.

The piece of furniture MC comprises a compartment formed by a ceiling 10, a bottom 14, a rear wall 16 and side walls 12 in front of which a door (not shown) is slidably mounted to close the compartment. MC furniture can have even more compartments.

The MC furniture is equipped with a servo mechanism to move the door between a closed position and an open position. In the closed position, the plane of the door is parallel and superimposed on the side wall 12, while in the open position the door closes the compartment, the plane of the door becomes parallel to the back 16. Thus, the door rotates 90 degrees around the vertical axis when moving.

The servomechanism contains two parallel and horizontal linear guides 20 installed at a certain distance from each other on the side wall 12.

Two carriages 26 are slidably mounted by wheels 28 on linear rails 20 to support the door sliding back and forth along the side wall 12.

In order to apply a return force during the closing movement of the door or to apply an extraction force during the opening movement of the door, the MC furniture comprises an articulated parallelogram mounted on a side wall 12 between two guides 20. The articulated parallelogram is formed by a vertical beam 40 connected to two carriages 26 and on which a door is installed, and two equal shoulders 50, turned to the wall 12.

Each arm 50 has a cam 54 on which a movable slider 56 can slide, pushed against the cam 54 by a spring 60. Thus, the slider 56 presses on the cam 54 and rotates the arm 50 to push the door towards the closed position or the open position.

For greater stability, it is preferable to "close" the articulated parallelogram with a vertical beam 61 rotated between the cams 54.

The MC furniture contains an eddy current damping magnetic shock absorber or system for damping the door as it moves to the end of travel in the closed position.

The upper linear guide 20 is a metal sectional beam 68, for example, of aluminum or copper, the cross section of which is in the form of straight channels to accommodate the carriage 26 and the skid 80 of the shock absorber or cushioning system.

Carriage 26 and skid 80 need not be separate elements; they can be one element.

Sectional beam 68 has a section 70, for example, aluminum or copper, with a C-shaped cross section, that is, a section containing two cantilever ribs 72 that are flat, coplanar and parallel. Cantilever ribs 72 are separated from each other by a certain distance 74 and offset relative to the flat wall 92 of the sectional beam 68 (central part C).

The skid 80 (FIGS. 5 and 6) is formed by two parallel and slightly spaced planes 82 which are slidably mounted with ribs 72 between them (due to the sandwich construction).

Planes 82 have a mirror structure and are formed by a flat metal plate 86, for example, made of mild steel, on which rows of permanent magnets 88 are located. In the example shown, there are two parallel rows of permanent magnets 88 for each plane 82, and each row of permanent magnets 88 in the plane 82 interacts with a corresponding row of permanent magnets 88 in another plane 82 to induce a magnetic field on the rib 72 to which they are facing.

The permanent magnets 88 in each plane 82 have a polar axis P orthogonal to the plate 86 and to each rib 72.

Assuming any reference orientation on a straight line orthogonal to the flat surface of the ribs 72, each row of permanent magnets 88 has N-S magnets alternating with S-N polarity magnets. That is, in a row, if a magnet has N-S polarity, the next magnet has S-N polarity, and vice versa.

Each row magnet 88 faces, on the other side of the ridge 72 along the above line, a magnet 88 with the same polar axis orientation. This means that in a row, the magnetic pole closest to rib 72 of each magnet 88 is different from the opposite magnet pole located on the other side of rib 80. the poles closest to leaf 72 are opposite (see example of N/S poles in FIGS. 7 and 8).

Thus, the row magnets 88 interact with the corresponding magnets 88 of the opposite row, creating a plurality of successive magnetic flux crossings within the rib 72 (see FIG. 8).

Placing magnets 88 on two opposite sides of rib 72 enhances the magnetic flux that passes through rib 72, thereby increasing the resulting braking effect due to eddy currents. With less braking efficiency, you can also use one row of magnets 88 to interact with the rib 72.

In the example shown, for each rib 72 there are two rows of cooperating magnets 88, so in total the skid 80 contains four rows of magnets 88, two in the same plane. The number of magnets in a row may differ from the number shown in the drawings.

The permanent magnets 88 are preferably enclosed in and separated by elements 76, these elements being preferably, but not necessarily, plastic, also used in the center of the skid 80 to accommodate the planes 82.

EXPLOITATION

As the door moves in opposite directions along wall 12 on rails 20, skid 80 slides back and forth on sectional beam 68, respectively. magnetic field in the direction of the rib 72, the rib 72 is subjected to a significant magnetic flux that changes over time. Therefore, eddy currents are induced in the rib 72 which create a magnetic field opposite to the polarity of the inducing field. The two fields are attracted to each other and the skid 80 is braked by and away from the rib 72.

Claims (19)

1. A servomechanism for moving the door of a piece of furniture (MC), comprising: - two parallel horizontal linear guides (20), - two carriages (26) respectively slidably mounted on linear guides (20) to support the sash in a slidable manner, - an articulated parallelogram formed by a vertical beam (40) connected to two carriages and installed to support and move the door, and two equal arms (50) turned towards the side panel of the piece of furniture, - cam (54), made in one piece with the shoulder, - a movable slider (56) displaced in the direction of the cam by an elastic element so as to put pressure on the cam and rotate the shoulder, characterized in that it contains an eddy current magnetic damper (80) for damping the door, the magnetic damper comprising a linear guide, in which, in one piece, a skid (80) is mounted with the door for sliding, wherein the linear guide contained in the magnetic damper and/or the skid containing the magnetic flux generators (88), and, accordingly, the skid and/or the linear guide contained in the magnetic damper, contains a metal track (70) on which the magnetic field generated by the magnetic flux generators can act and slide along it, and the linear guide contained in the magnetic damper is built into one of the two parallel linear guides in which two carriages are installed. 2. The servo mechanism of claim 1, wherein the metal track is made of a material selected from the group consisting of aluminum, copper, or high carbon steel. 3. Servo mechanism according to claim 1 or 2, wherein the linear guide contained in the magnetic damper and said one of the two parallel linear guides consist of a single sectional beam (68). 4. Servo mechanism according to claim 3, wherein said single sectional beam (68) comprises a channel for a wheel contained in one of said carriages. 5. Servo mechanism according to claim 3 or 4, wherein said one sectional beam or said track contains or consists of two cantilever coplanar ribs, on opposite flat sides of which the skid contained in the damper is slidably mounted and contains magnetic flux generators. 6. The servomechanism according to claim 5, and the skid contains two flat parallel elements (82), located at a distance from each other and installed so that they can slide, holding coplanar ribs between them, and each flat element has magnetic flux generators (88). 7. The servomechanism of claim 6, wherein the two planar parallel members each comprise a mild steel plate on which the magnetic flux generators are located. 8. Servo mechanism according to claim 6 or 7, each planar element comprising a row of magnetic flux generators aligned along the length direction of the track or one or each rib, the two rows being parallel and located respectively on the opposite side of the track or opposite the rib. 9. Servo mechanism according to claim 6 or 7, wherein each planar element comprises two or more parallel rows of magnetic flux generators arranged so that on each opposite side of the track (70) or rib (72) is a row of magnetic flux generators (88). 10. Servo mechanism according to claim 8 or 9, wherein all magnetic flux generators of one or each row have N-S polar axes parallel to each other. 11. The servomechanism according to any one of claims 8 to 10, wherein the N-S polar axis of each magnetic flux generator belonging to the row located along the side of the track or rib coincides with the N-S polar axis of the magnetic flux generator of the row located on the opposite side of the track or rib. 12. Servo mechanism according to any one of claims 8 to 11, wherein the magnetic flux generators of one or each row are oriented so as to have an N-S polar axis with an alternative direction. 13. Servo mechanism according to any one of claims 1 to 12, wherein said magnetic flux generators (88) are permanent magnets or powered solenoids. 14. Servo mechanism according to any one of claims 5 to 13, wherein the magnetic flux generators (88) have a polar axis orthogonal to the surface of the track (70) or rib (72).

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