HK1158721B - Self-closing and opening device particularly for a movable furniture part - Google Patents

Abstract

The self-closing and opening device (1) particularly of a movable furniture part (103) comprises a fixed guide (8) having a supporting body (2) in which a first slider (3) can slide reversibly along a sliding axis (100) in opposition to and through the action of first elastic means (5), the first slider (3) being engageable with first driving means (106) present on a driving element (6) which slides reversibly in the direction of the sliding axis (100), the supporting body (2) comprising first movement means (4) for movement of the first slider (3) suitable to engage with guide means (12, 13) of the first slider (3), so as to release it from the driving means (106), also provided with a mechanical or elastically yielding stop (9, 120) against which the first slider (3) rests directly or indirectly before it engages with the guide means (12,13) in the first movement means (4) the driving element (6) being then pushed by an ejector (20) generating an initial opening movement of said movable furniture part (103).

Description

Self-closing and opening device, in particular for movable furniture parts

The present invention relates to a self-closing device, in particular for movable furniture parts, such as parts that slide or swivel about a horizontal or vertical axis.

The subject matter of the invention can also be used for doors in general, etc.

It is known that devices have appeared on the market for some time which open and/or close movable furniture parts, such as doors or drawers of furniture, more or less automatically.

For example, in order to open a drawer of a piece of furniture, a device known as a catch is generally used, which is generally provided with a pushing element that is released by a slight pressure and, when released, gives the drawer a push under the action of a spring force that determines a controlled movement of the drawer, so as to be able to allow the user to grip the drawer to perform a full opening of the drawer, in particular if the drawer has no handle.

Conversely, for closing the drawer, a self-closing device is used, which is usually associated with a fixed guide (guide) of the drawer and has a support for a slider (slider) which can move in a groove (groove) formed in the support.

Normally, the slider moves inside the channel, in contrast to and thanks to the action of the spring, and is driven by a driving element integral with the extractable guide of the drawer.

The opening of the drawer causes the actuation of a self-closing device which, when the drawer is closed again, in the final section of its travel, gains control of the drawer, for example by means of a pin, and returns it to the fully closed position by means of the action of a spring.

Usually, working in conjunction with the self-closing device, there are also reducers which slow down the closing of the drawer, reducing the shocks that would occur due to the closing spring of the drawer.

From the above, it can be easily understood how complex to combine an automatic opening system with a self-closing system of a movable furniture part, since normally the force of the catch (play) and the force of the self-closing device tend to oppose each other, preventing the opening or closing of the drawer.

For this reason, systems have sometimes been designed very complex, for which purpose also use is made of parts which are moved by means of a motor to overcome the forces acting and allow a more or less automatic (even partial) opening and closing of the movable furniture part.

These solutions are sometimes of little effect, since, in addition to making the device very complex, they end up tending to not work stably, requiring constant maintenance and being costly, which makes them unsuitable for some types of furniture.

In the case where the movable part consists of a drawer, the self-closing device can be positioned indifferently on, for example, a guide for the movement of the self-closing device. However, in the case of swinging the door by means of a hinge, the device must preferably be placed on the part of the piece of furniture opposite to the position where the hinge is located, i.e. the device must be located in such a position: in this position, movement of the door sufficient to operate the device is achieved by external pressure applied by the user. The opening of the door occurs in the case where the edge of the door is completely removed from the side on which the door rests and, therefore, the interaction between the drive element and the slide of the self-closing system is more complex.

Moreover, different types of hinges are available on the market, in particular hinges incorporating elastic means for pushing the door in the closing direction, optionally assisted by deceleration means, or hinges equipped with elastic means for pushing the door in the opening direction, usually combined with the aforesaid catch means.

The technical aim of the present invention is therefore to produce a self-closing device of a movable furniture part which allows to eliminate the drawbacks of the prior art described above.

Within the scope of this technical aim, an object of the present invention is to produce a self-closing device, particularly for movable furniture parts, which can be combined with an opening system of a movable furniture part and which is reliable and very easy to operate, ensuring its long-term effectiveness, without requiring any type of ordinary or extraordinary maintenance for this purpose.

Another object of the present invention is to produce a self-closing device of a movable furniture part which can be installed without difficulty even by non-professional persons, so that it can also be replaced or adjusted when required by the user, and which is low in cost, thus promoting its popularity in the market.

It is a further object of the present invention to produce a self-closing device of a movable furniture part which can be mounted on any type of furniture and which occupies a limited space.

This technical aim, as well as these and other objects according to the present invention, are achieved by producing a self-closing device, in particular for movable furniture parts, in accordance with the appended claim 1.

Further, other features of the invention are defined in the dependent claims.

Further characteristics and advantages of the invention will appear more clearly from the description of a preferred but not exclusive embodiment of the self-closing device of a movable furniture part according to the invention, illustrated by way of non-limiting example in the accompanying drawings, in which:

fig. 1 shows a plan view of a device according to a first preferred embodiment of the invention, when the drive element is in the initial position and the door is closed;

figure 2 shows the device according to figure 1, with the drive pin disengaged from the rear slot of the first slider;

fig. 3 shows the device of fig. 1, with the drive pin resting on the side wall of the front slot of the first slider and in a position in which: in this position, the door has been opened to an extent suitable for allowing a user to grasp the door;

figure 4 shows the device of figure 1, wherein the drive pin has been disengaged from the first slider member and the door has been released from the drive element by an external action from the user;

fig. 5 shows the device of fig. 1 in a stage in which: in this phase, during the retraction of the drive element, the drive pin abuts against the side wall of the rear slot of the first slider;

FIG. 6 shows the arrangement of FIG. 1 with the door open and showing the drive element back in the initial position;

FIG. 7 shows a cross-section of the device of FIG. 1 along line 7-7;

FIG. 8 shows the device of FIG. 1 mounted on a piece of furniture and encased in its own cover;

FIG. 9 shows a plan view of the stationary guide of the device of FIG. 1;

FIG. 10 shows a plan view of the interior of the cover of the stationary guide of the device of FIG. 1;

FIG. 11 shows a plan view of the drive element of the device of FIG. 1;

FIG. 12 shows a side view of a second slide of the device of FIG. 1;

FIG. 13 shows a plan view of the right side portion of a guide for a drawer having a device according to a second preferred embodiment of the present invention;

FIG. 14 shows a side view on an enlarged scale of a portion of the device in FIG. 13;

FIG. 15 shows a plan view of the device of FIG. 13 when the drawer (not shown) is in a closed position;

fig. 16 shows the device according to fig. 15 after the drawer has undergone a slight pressure that causes it to retract further into the piece of furniture and causes the slider to move in opposition to the action of the second spring;

FIG. 17 shows the device of FIG. 13 with the drive pin abutting the side wall of the front slot of the slider, and with the drawer open to an extent that allows a user to grasp the drawer;

figure 18 shows the device of figure 13, in which, by external action of the user, the drive pin engages in the front slot of the slider driving the drive pin until the guide means disengage from the first movement means;

figure 19 shows the device of figure 13 when the guide of the slider is engaged in the second movement means and the drive pin is disengaged from the slider;

FIG. 20 shows a closing step of the drawer with reference to the device in FIG. 13, in which the driving pins engage the side walls of the rear slot of the slider; and

fig. 21 shows a possible variant of the device according to the invention, in which the elastically yielding stop has been replaced by a mechanical stop.

In the description, the same reference numerals are used to denote the same components.

Reference is made to a first preferred embodiment according to the present invention illustrated in fig. 1-12.

There is shown a self-closing device for a movable furniture part according to the present invention, generally indicated by reference numeral 1.

For this embodiment, the movable furniture part 103 is intended to mean a door that pivots with respect to the body of the furniture, but more generally, the movable furniture part can also be a drawer or similar part. Also, as mentioned, the present invention can be applied to the field of general doors and the like.

The device 1 is preferably associated with a fixed guide 8 fastened to a fixed part 116 of the furniture and has a support body 2 for a first slider 3 which is moved bidirectionally in the direction of the sliding axis 100 between the rear end and the front end of the channel 4, in contrast to and as a result of the action of first elastic means, in particular a first spring 5.

The groove 4 extends in a straight line in the direction of the sliding axis 100.

The first slide 3 can be engaged with first driving means present on a driving element 6 which is movable bidirectionally in the direction of the sliding axis 100 between a position of retraction into the fixed guide 8 and a position of extraction from the fixed guide 8.

The groove 4 comprises, in its rear end region, first means for the movement of the first slide 3 transversely to the sliding axis 100, which are adapted to engage with dedicated guide means of the first slide 3.

Moreover, the groove 4 comprises, in its front end region, second means for the movement of the first slide 3 transverse to the sliding axis 100, which are adapted to engage with the guide means of the first slide 3.

The first displacement means comprise a central lateral cavity 10 and a rear bend 11 of the channel 4. However, the second displacement means comprise a front curve 14 of the groove 4, which extends from the same portion of the groove 4 as the intermediate lateral chamber 10 and the rear curve 11.

The guide means in turn comprise a front guide pin 12 and a rear guide pin 13.

The front guide pin 12 and the rear guide pin 13 are adapted to engage into the intermediate lateral cavity 10 and the rear bend 11 of the groove 4, respectively, and the front guide pin 12 may alternatively be adapted to also engage into the front bend 14 of the groove 4.

The first slider 13 includes a rear surface slot 109 and a front surface slot 110 into which the drive pin 106 is selectively engaged.

The rear surface groove 109 and the front surface groove 110 have side walls 111 and 112, respectively, which protrude with respect to a partition surface 113 between the front surface groove 109 and the rear surface groove 110 to block the drive pin 106.

In particular, the partition surface 113 is flat and the side walls 111 and 112 project out of the plane of the partition surface 13.

The device 1 is also provided with an elastically yielding stop 9, fixed to the supporting body 2, against which the first slide 3 directly or indirectly abuts before it engages with its guide means in the first movement means of the groove 4.

The stop 9 has a main axis oriented in the direction of the sliding axis 100, and comprises a fixed part 9a and a movable part 9b, between which a spring (not shown) is interposed, advantageously with an elastic strength greater than that of the first spring 5, so as to be able to stop the first slider 3 in a position corresponding to the closed position of the movable part 103 when it is free to slide.

The device 1 also has means 104 for removably coupling between the movable part 103 and the drive element 16.

The coupling means (coupling device)104 can not explicitly comprise magnetic or mechanical connection means of known type, for example mounted to the inside of the movable part 103 and to the front end of the drive element 6.

In the case of a magnetic connection, the coupling force exerted by the coupling device must be calibrated so as to allow the coupling force to be released due to a reasonable force exerted by the user.

In the case of a mechanical type of connection, the coupling means must allow to separate the above-mentioned movable part from the drive element 6 in the extracted position thereof.

In a first preferred embodiment of application of the device to a piece of furniture provided with a hinge exerting a push in the closing direction of the movable part 103, there is also provided a second slider 101 carried by the fixed guide 8 and which is moved bidirectionally in the direction of the sliding axis 100, in contrast to and as a result of the action of second elastic means, in particular of a second spring 102.

The second slide 101 is engaged with a second drive means 107 present on the drive element 6. In this case, the coupling force of the coupling means must be greater than the sum of elastic return forces (elastic return forces) indirectly exerted on the driving element 6 towards the retracted position by the first and second elastic means, in particular the first and second springs 5, 102.

The driving element 6 has a rod-like body 105 and is slidingly supported in a guide element 114 formed in the cover 105 of the fixed guide 8.

The axis of the rod-like body 105 extends in the direction of the sliding axis 100.

The first driving means of the driving element 6 comprise a driving pin 106 extending transversely to the rod-shaped body 105 and adapted to engage with the first slider 3.

The second driving means of the driving element 6 comprise a projection 107 extending transversely from the rod-shaped body 105 and constrained to slide in a guide slot 108 formed in the second slide 101.

Finally, the device 1 has an ejector 20, which is supported in the fixed guide 8 behind the drive element 6.

The ejector 20, which comprises a fixed part 20a containing a movable spindle 20b, is adapted to act on the rear seat of the rod-like body 105 with a force greater than the force exerted thereon by any independent closing means (such as those incorporated into hinges) to produce an initial opening movement of the movable part 103.

However, the ejection force exerted by the ejector 20 is smaller than the elastic force of the first spring 5.

Advantageously, ejector 20 is equipped, in a known manner, with means for adjusting the thrust exerted.

The ejector 20 also has a main axis oriented in the direction of the sliding axis 100.

The operation of the device according to the invention is apparent from the description and illustration, which are in particular substantially as follows.

Fig. 1 depicts the situation of the device 1 when the movable part 103 is closed.

In a first step, in which the movable part 103 is closed and coupled with the drive element 6, the drive pin 106 is engaged in the rear slot 109 of the first slider 3, which is held in a first stop position, in which it abuts against the elastically yielding stop 9, the spring of which is not compressed but is only preloaded, to hold the first slider 3 in position. Since the force of the ejector 20 is smaller than the force of the first spring 5, the rear end of the drive element 6 abuts against the front (head) of the ejector 20 having the spindle 20b in the retracted position.

In a subsequent second step of return of the drive element 6 shown in fig. 2, the first slide 3 is moved back into the second position by external pressure (i.e. generated by the user) on the movable part 103.

In the second position of the first slider 3, the front guide pin 12 and the rear guide pin 13 engage respectively in the intermediate lateral cavity 10 and in the rear curved portion 11 of the groove 4. Movement of the first slider 3 transversely to the sliding axis 100 causes the driving pin 106 to disengage from the rear slot 109.

In a subsequent third step, shown in figure 3, the drive pin 106 is released from the rear slot 109 and the drive element 6 is retracted, due to the push exerted by the ejector 20 and now temporarily no longer against the spring 5 or naturally no longer against the user, so that the movable part 103 performs its initial opening movement, which is terminated when the drive pin 106 is blocked by the projecting side wall 112 of the front slot 110 of the first slider 3.

In the first three steps, the protrusion 107 slides freely in the guide groove 108.

In a subsequent fourth step, shown in figure 4, due to the external pulling force on the movable part 103 (i.e. generated by the user), the driving pin 106 blocked by the side wall 112 of the front slot 110 of the first slider 3 first drives the first slider 3 so that the front guide pin 12 and the rear guide pin 13 disengage from the intermediate lateral cavity 10 and the rear bend 11 of the groove 4, respectively. The movement of the first slider 3 transversely to the sliding axis 100 then causes the engagement of the driving pin 106 in the front slot 10. During the fourth step, after having come into contact with the front end of the guide groove 108, the projection 107 starts to drive the second slide 101 to the end of its travel in the following positions: in this position, the front end of the second slide 101 is blocked by the front wall of the fixed guide 8 and therefore blocks further advancement of the drive element 6. Before the second slider 101 reaches the end of its travel, the front guide pin 12 engages with the front curve 14 of the groove 4 so that the first slider 3 moves transversely to the direction of movement 100, so that the drive pin 106 disengages from the front slot 110. The coupling force ensured by the coupling means is greater than the sum of the return forces caused by the first spring 5 and the second spring 102, so that the drive element 6 can be driven forward. When the drive element 6 reaches the end of its travel during extraction, the pulling force on the movable part 103 becomes dominant with respect to the coupling force ensured by the coupling means in the case of a magnetic connection, or, in the case of a mechanical connection, the coupling means is released from its coupling, the movable part 103 is released from the drive element 6 and can be brought into a fully open position.

In a subsequent fifth step, shown in fig. 5, the second slide 101 retracts the driving element 6 towards the inside of the fixed guide 8 by means of the spring 102. During this step, the drive pin 106, blocked by the side wall 111 of the rear slot 109, initially moves the first slider 3 transversely to the sliding axis 100 and disengages the front guide pin 12 from the front curve 14. The first slider 3 can therefore also be returned to the position it was in the first step (fig. 6) by means of the spring 5.

In the case of pushing the piece of furniture with the hinge provided with the elastic system in the opening direction of the revolving furniture part, the driving element 6 must remain in its extracted position when the revolving part is closed again, in order to be coupled again with the revolving part. This type of hinge therefore makes the second slider and the second elastic means superfluous and allows to optionally provide a reducer instead of an ejector to slow down the closing movement of the revolving member caused by the spring 5 which moves it back when the slider 3 is coupled with the driving element 6. The present device thus allows to simply and functionally open and close the door or drawer, facilitating the user's grip on the door or drawer and providing a guided closing of the door or drawer.

Reference should now be made to a second preferred embodiment of the present invention illustrated in fig. 13-20.

There is shown a self-closing device for a movable furniture part according to the present invention, generally indicated by reference numeral 1.

For this preferred embodiment, the movable furniture part 103 is exclusively intended as a drawer, but more generally, the movable furniture part may also be a door or similar part that is pivoted relative to the body of the furniture. Also, as mentioned, the present invention can be applied to the field of general doors and the like.

The device 1 associated with the fixed guide 8 comprises a supporting body 2 for a slider 3 which is mobile bidirectionally along the sliding axis 100, in contrast and by the action of first elastic means, in particular a first spring 5, which is coupled at one end with a connection 150 formed on the extension of the slider 3 and at the other end with a connection 151 formed on the extension of the supporting body 2.

The slider 3 can be engaged with drive means present on a drive element 6 moving bidirectionally in the direction of the sliding axis 100 and integral with the extractable guide 7 of the drawer in which it is installed.

However, it is also possible that the support body 2 is associated with an extractable guide 7 and the drive element 6 is associated with a fixed guide 8.

The supporting body 2 comprises first means for the movement of the slider 3, which are adapted to engage with dedicated guide means of the slider in order to release the slider from the driving means.

There is also an elastically yielding stop 9 against which the slide 3 directly or indirectly abuts before it engages with the guide means in the first movement means.

The stop 9 has a main axis oriented in the direction of the sliding axis 100, and comprises a fixed part 9a and a movable part 9b, between which a spring (not shown) is interposed, advantageously with an elastic strength greater than that of the first spring 5, so as to be able to stop the first slider 3 in a position corresponding to the closed position of the movable part 103 when it is free to slide.

The coupling means comprise a drive pin 106 extending transversely to the sliding axis 100 and adapted to engage with the first slider 3.

The supporting body 2 has a groove 4 which comprises, in its rear end region, first means for the movement of the slide 3 and, in its front end region, second means for the movement of the slide 3 transversely to the sliding axis 100, which are adapted to engage with the guide means of the slide 3.

The grooves extend in a straight line in the direction of the sliding axis 100.

The first displacement means comprise a central lateral cavity 10 and a rear bend 11 of the channel 4. However, the second displacement means comprise a front curve 14 of the groove 4, which extends from the same portion of the groove 4 as the intermediate lateral chamber 10 and the rear curve 11.

The guide means in turn comprise a front guide pin 12 and a rear guide pin 13.

The front guide pin 12 and the rear guide pin 13 are adapted to engage into the intermediate lateral cavity 10 and the rear bend 11 of the groove 4, respectively, and the front guide pin 12 may alternatively be adapted to also engage into the front bend 14 of the groove 4.

The first slider 3 includes a rear surface groove 109 and a front surface groove 110 into which the drive pin 106 is selectively engaged.

The rear surface groove 109 and the front surface groove 110 have side walls 111 and 112, respectively, which protrude with respect to a partition surface 113 between the front surface groove 109 and the rear surface groove 110 to block the drive pin 106.

In particular, the partition surface 113 is flat and the side walls 111 and 112 project out of the plane of the partition surface 13.

An ejector 20 adapted for the initial opening movement of the drawer can be associated with the device.

The ejector 20 is adapted to interact with a stop 21 integral with the extractable guide 7, but with a force lower than the force exerted by the first spring 5.

The ejector 20 comprises a fixed part 20a containing a movable spindle 20b, provided in a known manner with means for adjusting the thrust exerted and having a main axis oriented in the direction of the sliding axis 100.

In a constructive variant not shown, the ejector can be replaced by a suitable inclined plane, not shown, of the fixed guide and/or of the sliding guide of the drawer, along which the drawer can slide due to gravity.

In another constructive variant, the ejector can be replaced by a magnet, not shown here, oriented to generate a repulsive force, able to allow the drawer to slide and, as in the other cases, to facilitate the user's grip on the drawer.

The operation of the device according to the invention is apparent from the description and illustration, which are in particular substantially as follows.

Fig. 15 depicts the device 1 when the drawer is closed. The drive pin 16 engages in a rear slot 109 of the slider 3 held in a first stop position in which it rests against an elastically yielding stop 9, the spring of which is not compressed but preloaded to hold the slider 3 in position. Since the force of the ejector 20 is smaller than the force of the first spring 5, the stopper 21 abuts against the front of the ejector 20 having the spindle 20b in the retracted position.

In a subsequent step shown in fig. 16, the slider 3 is moved back by external pressure applied to the drawer (i.e. generated by the user). In this position of the slider 3, the front guide pin 12 and the rear guide pin 13 engage respectively in the intermediate lateral cavity 10 and in the rear curve 11 of the groove 4. Movement of the slider 3 transversely to the sliding axis 100 causes the drive pin 106 to disengage the rear slot 109.

In a subsequent step shown in fig. 17, the drive pin 103 is released from the rear slot 109 and, due to the push exerted by the ejector 20 and now temporarily no longer resisting the spring 5 or naturally the user, moves so that the drawer performs its initial opening movement, which terminates when the drive pin 106 is blocked by the projecting side wall 112 of the front slot 110 of the slide 3.

In a subsequent step shown in fig. 18, due to the external pulling force on the drawer (i.e. generated by the user), the driving pin 106 blocked by the side wall 112 of the front slot 110 of the slider 3 first drives the slider 3 causing the front 12 and rear guide pins to disengage from the intermediate 10 and rear 11 side walls of the groove 4, respectively. Movement of the slider 3 transversely to the sliding axis 100 thereafter causes engagement of the drive pin 106 into the front slot 110.

In a subsequent step shown in fig. 19, the engagement of the front guide pin 12 with the front curve 14 of the groove 4 causes the slider 3 to move transversely to the direction of movement 100, so that the drive pin 106 disengages from the front slot 110 and is free to travel to the fully open position of the drawer.

In a subsequent closing step shown in fig. 20, the user pushes the drawer closed. During this step, the drive pin 106, blocked by the side wall 111 of the rear slot 109, initially moves the slider 3 transversely to the sliding axis 100 and disengages the front guide pin 12 from the front curve 14. The slider 3 can therefore also be returned to the position it was in the first step (fig. 15) by means of the spring 5.

If it is desired to make the entire system more compact, the ejector may be mounted on the support body 2 behind an elastically yielding stop.

Furthermore, as has been seen, the ejector can be replaced by an inclined guide, however, a magnet or other system is suitable for moving the drawer.

With particular reference now to fig. 21, the elastically yielding stop 9 is replaced by a mechanical stop formed by a step 120 of the supporting body 2 arranged transversely to the direction of the slider 3. The rear wall 119 of the slider 3 abuts against the step 120. The pin 106 integral with the extractable guide 7 is pushed against the inclined surface 118 of the slider 3 by means of a force applied externally to the movable furniture part, which causes a transversal movement of the same slider along the step 120 and inside the appropriate side groove 10, 11 of the groove 4, thus releasing the pin 106 and enabling the extractable guide 7 to be pushed open by the ejectors 20a, 20 b.

In fact, it has been seen that the device according to the invention is particularly advantageous in that: allowing simple and functional opening and closing of the door or drawer, facilitating the user's grasping of the door or drawer, and providing guided closing of the door or drawer.

It is therefore contemplated that the present invention will be susceptible to various modifications and variations, all of which fall within the scope of the inventive concept; moreover, all the details can be replaced with technically equivalent elements.

In practice, the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Claims (18)

1. Self-closing device for a movable furniture part (103) associable with an opening system of said movable furniture part, characterised in that it comprises a fixed guide (8) having a supporting body (2) in which a first slider (3) can slide bidirectionally along a sliding axis (100) in opposition to and thanks to first elastic means (5), said first slider (3) being engageable with first driving means comprising a first driving pin (106) present on a driving element (6) which slides bidirectionally in the direction of said sliding axis (100), said supporting body (2) comprising first moving means for the movement of said first slider (3), said first movement means being able to engage with guide means of said first slider (3) so as to release it from said first drive means, said self-closing means being further provided with a first mechanical or elastically yielding stop (9, 120) against which said first slider (3) directly or indirectly abuts before the guide means of said first slider engage in said first movement means, said supporting body (2) having a groove (4) comprising in its rear end region said first movement means for the movement of said first slider (3) and in its front end region second movement means for the movement of said first slider (3) transversely to said sliding axis (100), said second movement means being able to engage with said guide means of said first slider (3), the first slider (3) comprises a rear slot (109) and a front slot (110) into which the first drive pin (106) is selectively engaged, the front slot (110) and the rear slot (109) having respective lateral walls (112, 111) that project with respect to a surface (113) separating the front slot (110) from the rear slot (109) to block the first drive pin (106).

2. Self-closing device (1) according to claim 1, characterised in that said first movement means comprise a central lateral cavity (10) and a rear bend (11) of said groove (4).

3. Self-closing device (1) according to claim 2, characterised in that said second movement means comprise a front curve (14) of said groove (4) arranged on the same portion of said groove (4) as said intermediate lateral cavity (10) and said rear curve (11).

4. Self-closing device (1) according to claim 3, characterised in that said guide means comprise a front guide pin (12) and a rear guide pin (13), said front guide pin (12) and said rear guide pin (13) being suitable for engaging into said intermediate lateral cavity (10) and into said rear bend (11) of said groove (4), said front guide pin (12) being also suitable for engaging into said front bend (14).

5. Self-closing device (1) according to claim 1 or 2, characterised in that said driving element (6) is slidingly supported in a guide element (114) formed in a cap (115) of said fixed guide (8).

6. Self-closing device (1) according to claim 1 or 2, characterized in that it has a detachable coupling means (104) between said movable furniture part (103) and said driving element (6).

7. Self-closing device (1) according to claim 6, characterised in that it comprises a second slider (101) carried by said fixed guide (8) and which slides bidirectionally in the direction of said sliding axis (100) in opposition to and thanks to second elastic means (102), said second slider (101) being engageable with second driving means (107) present on said driving element (6).

8. Self-closing device (1) according to claim 7, characterised in that said detachable coupling means (104) have a coupling force greater than the sum of the return forces exerted indirectly by said first elastic means (5) and said second elastic means (102) on said driving element (6).

9. The self-closing device (1) according to claim 7, characterized in that said second driving means comprise a projection (107) extending transversely from said driving element (6) and constrained to slide in a guide slot (108) forming said second slider (101).

10. The self-closing device (1) according to claim 1 or 2, characterized in that said fixed guide (8) supports an ejector (20) located behind said driving element (6), said ejector being suitable to produce an initial opening movement of said movable furniture part (103).

11. Self-closing device (1) according to claim 10, characterised in that said ejector (20) has an ejection force lower than the elastic force of said first elastic means (5).

12. Self-closing device (1) according to claim 1 or 2, characterised in that said fixed guide (8) supports a reducer behind said driving element (6) suitable for acting on the rear seat of said driving element (6) to slow down the closing of said movable furniture part (103).

13. Self-closing device (1) according to claim 1 or 2, characterised in that said drive element (6) is bidirectionally slidable in the direction of said sliding axis (100) integral with an extractable guide (7).

14. Self-closing device (1) according to claim 1 or 2, characterised in that said first elastic means (5) exert an elastic force on said first slider (3) in contact with said first elastically yielding stop (9) that is lower than the elastic force generated by said first elastically yielding stop (9).

15. The self-closing device (1) according to claim 1 or 2, characterized in that said first mechanical stop is formed by a step (120) of said supporting body (2) arranged transversally to the direction of said first slider (3), the rear wall (119) of said first slider then abutting against said step (120).

16. The self-closing device (1) according to claim 15, wherein said first slider (3) has an inclined surface (118) against which said first driving pin (106) is adapted to be pushed, so as to move said first slider (3) transversely along said step (120).

17. Furniture provided with a self-closing device (1) according to any of claims 1 to 16 and having a hinge with means for pushing the movable furniture part in a closing direction.

18. Furniture provided with a self-closing device (1) according to any of claims 1 to 16 and having a hinge with means for pushing the movable furniture part in the opening direction.