Hinge for furniture door

Abstract

A hinge for a furniture door is provided. The hinge includes a fixed portion having a flat shape adapted to be inserted into a seating portion provided in a thickness portion of an upper wall or a lower wall of the piece of furniture, and a movable portion connectable to a door of the piece of furniture, the fixed portion being adapted to be inserted into a seating portion provided in a thickness portion of the upper wall or the lower wall of the piece of furniture. The fixed part and the movable part are swingably connected to each other by means of a plurality of hinge shafts and at least a first connecting rocker and a second connecting rocker, the hinge further comprising: an elastic closing device for closing the hinge and operatively connected to one of the rockers; the speed reduction device is arranged in the fixed part of the hinge piece and is directly actuated by at least one connecting rocker of the two rockers or is indirectly actuated by at least one connecting rocker of the two rockers through a transmission mechanism; an adjustment device located between the fixed part and the movable part and comprising a vertical eccentric adjustment device, the vertical eccentric adjustment device comprising a holding device adapted and arranged to hold the adjustment device in an adjustment position.

Description

Technical Field

[0001] The utility model relates to an invisible hinge for furniture doors and the like, and in particular to a hinge having a fixed portion or wing-shaped portion, which is configured to be inserted into a seat portion arranged in a thickness portion of a substantially horizontal wall of a furniture piece. Background Art

[0002] In the field of furniture, in order to support a furniture door in a swingable manner, a hinge is usually used, which includes a fixed part or wing and a movable part, the fixed part or wing can be connected to the furniture body, and the movable part includes a box-shaped body and can be connected to the door, the fixed part or wing, and the movable part are hinged to each other in a swinging manner by means of at least one rotation axis, and more preferably, the fixed part or wing, and the movable part are hinged to each other in a swinging manner by a hinge system including a hinge axis and a connecting rocker.

[0003] In order to move the door into the closed position and to keep it in the closed position, the hinge also comprises suitable elastic means for stressing the hinge itself in the closing direction.

[0004] Due to the presence of these elastic means, the door strikes against the body of the piece of furniture when it corresponds to the closed position, thus causing undesirable noises.

[0005] In order to overcome this problem, it has been proposed in various ways to employ a reduction device, for example of the linear or rotary type, associated with one of the parts of the hinge in order to damp the closing movement of the hinge itself.

[0006] In the context of the continuous development of furniture design, completely invisible hinges have been proposed, in which the fixing part has a flat shape to be inserted into a seat provided in the thickness of the upper or lower wall of the furniture piece, and in which the rocker is also flat and extends according to the plane in which the fixing part is located.

[0007] In order to decelerate this completely invisible hinge, for example, it has been proposed to provide a deceleration device mounted externally on an extension of the fixed part of the hinge, the deceleration device having an actuating part protruding on the front side of the cabinet, such as a tip end connected to a decelerator rod, so as to be directly operated by the movable part of the hinge; however, in addition to the greater obstruction to the fixed part of the hinge due to the presence of the external decelerator, this solution also has improper operation, because the movable part of the hinge only contacts the operating part of the decelerator in the last few degrees of the closing movement, and therefore this solution cannot effectively decelerate the closing movement of the door.

[0008] In order to overcome these problems, a different solution is proposed in WO 2016174071, in which a reduction device is arranged on the inner side of the fixed part of the hinge and is directly actuated by one of the two rockers, or is indirectly actuated by one of the two rockers via a transmission mechanism.

[0009] However, when heavy and / or bulky doors are installed, the hinges according to this known solution present some limitations as regards: in particular the closing force exerted by the elastic means, which may be insufficient to properly close the door; and / or any vertical looseness of the hinges, which mainly stems from the fact that the vertical adjustment means provided in these hinges tend to become unadjustable. Utility Model Content

[0010] The object of the invention is therefore to provide an invisible hinge for a furniture door or the like, having a fixing portion or wing shaped to be inserted into a seat provided in the thickness of a substantially horizontal wall of the furniture, the hinge retaining optimal functionality and stability even in the case of heavy and / or bulky doors.

[0011] According to a general embodiment, the above-mentioned purpose can be achieved by a hinge for a furniture door, which includes: a fixed part with a flat shape, which is suitable for being inserted into a seating part arranged in the thickness part of the upper wall or the lower wall of the furniture piece; and a movable part, which can be connected to the furniture door, the fixed part and the movable part are connected to each other in a swinging manner by means of a hinge system, the hinge system includes a plurality of hinge axes and at least a first connecting rocker and a second connecting rocker, the hinge includes an elastic closing device for closing the hinge, the elastic closing device is operatively connected to one of the rockers, and the hinge is connected to the furniture door. The elastic device includes a first coil spring, and the hinge also includes a deceleration device, which is suitable for decelerating at least a part of the closing movement of the hinge. The deceleration device is arranged on the inner side of the fixed part of the hinge, and the deceleration device can be directly actuated by at least one of the two rockers, or the deceleration device can be indirectly actuated by at least one of the two rockers through a transmission mechanism. It is characterized in that the elastic closing device includes an additional second coil spring, which is arranged coaxially with the first coil spring of the elastic closing device so that the second coil spring is operatively connected to one of the rockers.

[0012] According to different and general embodiments, the above objects can be achieved by a hinge for a furniture door, the hinge comprising: a fixed part with a flat shape, which is suitable for being inserted into a seat provided in a thickness portion of an upper wall or a lower wall of a piece of furniture; and a movable part, which can be connected to the furniture door, the fixed part and the movable part being connected to each other in a rocking manner by means of a hinge system, which comprises a plurality of hinge axes and at least a first connecting rocker and a second connecting rocker, the hinge also comprising:

[0013] an elastic closing device for closing the hinge, the elastic closing device being operatively connected to one of the rockers,

[0014] a reduction device, which is suitable for reducing at least a part of the closing movement of the hinge, the reduction device being arranged in the fixed part of the hinge and being directly actuatable by at least one of the two rockers or indirectly actuatable by at least one of the two rockers via a transmission mechanism,

[0015] An adjusting device, the adjusting device is located between the fixed part and the movable part of the hinge, and the adjusting device includes a vertical eccentric adjusting device,

[0016] Characterized in that the vertical eccentric adjustment device comprises a retaining device which is suitable and arranged to retain the adjustment device in the adjusted position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features and advantages of the invention will be further derived from the description of two preferred but non-exclusive embodiments of the reduction hinge according to the invention, which are shown in the accompanying drawings in an illustrative and non-limiting manner, in which:

[0018] Figure 1 A perspective view of a hinge according to the present invention is shown;

[0019] Figure 2 shows a perspective exploded view of a hinge according to a first embodiment of the present invention;

[0020] Figure 3 A cross-sectional view showing a hinge according to a first embodiment of the present invention mounted on a piece of furniture, wherein the door is in a closed state;

[0021] Figure 4 A cross-sectional view showing a hinge according to a second embodiment of the invention installed in a piece of furniture, wherein the door is in a closed state; and

[0022] Figure 5is a cross-sectional view of the movable part of the hinge, taken according to a plane orthogonal to the axis of rotation of the vertical adjustment device. DETAILED DESCRIPTION

[0023] Referring to the accompanying drawings, the hinged part according to the present invention, which is generally represented by the reference numeral 10, includes a fixed part 11 or a wing-shaped part having a flat shape and includes a movable part 14, wherein the fixed part 11 or the wing-shaped part is suitable for being inserted into a seat 12 set in the thickness part of the upper wall or the lower wall 13 of the furniture piece, and the movable part 14 is suitable for being inserted into a seat 15 defined in a leaf 16 of the same furniture piece.

[0024] Preferably, the fixing part 11 comprises an outer casing formed by two half-shells 11 ′, 11 ″ that can be coupled together; however, it is not excluded that the casing can be made as a single body.

[0025] The fixed part 11 and the movable part 14 of the hinge are connected to each other in a swinging manner by means of an articulation system, which includes a plurality of articulation axes and at least a first connecting rocker 21 and a second connecting rocker 22. The plurality of articulation axes are preferably four articulation axes 17, 18, 19, 20, and the first connecting rocker 21 and the second connecting rocker 22 are suitable for allowing the movable part 14 to be articulated relative to the fixed part 11.

[0026] Preferably, the first connecting rocker 21 and the second connecting rocker 22 can be formed as flat plate-like members, and the hinge axes 17, 18, 19, 20 are orthogonal to the flat plate-like members.

[0027] Due to the flat shape of the fixing part 11, the hinge is completely hidden after assembly and only a portion of the rockers 21 and 22 is visible and protrudes from the wall of the furniture piece, which portion of the rockers 21 and 22 is still exposed to view when the furniture door is open.

[0028] The fixing part 11 of the hinge has a flange 23 on the front side with holes 24 for fixing screws to allow the fixing part 11 to be fixed when inserted into the seat 12 in the upper or lower wall 13 of the furniture piece, thereby acting directly on the screws from the front surface of the upper or lower wall 13 of the furniture piece itself.

[0029] The hinge 10 also includes an elastic closing device for closing the hinge, which is operatively connected to one of the rockers 21, 22, for example, to the first rocker 21, and the elastic device includes a first coil spring 25 arranged in a sliding shell body 26, and a rolling member 27 acting on the cam surface 28 of the rocker 21 is provided at the end of the sliding shell body 26.

[0030] The rockers 21 and 22 are connected in a pivotable manner via respective hinge axes 17 , 19 to a plate-shaped element 29 which has a cavity 30 which allows the housing body 26 for the spring 25 to be accommodated.

[0031] The hinge according to the invention further comprises a deceleration device 31, which is arranged in the fixed part 11 and can be directly actuated by at least one of the rockers 21, 22, or can be indirectly actuated by at least one of the rockers 21, 22 via a transmission mechanism. The deceleration device allows deceleration of at least a portion of the closing movement of the hinge according to the invention.

[0032] Preferably, the reduction device 31 may be directly or indirectly actuated by an edge of at least one of the first connecting rocker 21 and the second connecting rocker 22 , wherein the edge is cam-shaped.

[0033] In the case of indirect actuation of the reduction gear 31, as Figure 2 and Figure 3 As shown, a transmission mechanism is preferably provided, which includes a rocking arm 32 operated by at least one of the rocking arms, for example by a portion of the first rocking arm 21 or a cam surface 33, wherein the rocking arm 32 has a surface or portion 34, which is shaped and arranged to operate the reduction device 31, for example by a pusher 35.

[0034] Preferably, the rocker arm 32 may be shaped as a flat plate-like piece and has a surface or portion 34 adapted and arranged to actuate the reduction device 31 .

[0035] Preferably, the rocker arm 32 may also have a portion or a cam surface at an edge in contact with the rocker arm 21 and / or in contact with the reduction device 31 .

[0036] Preferably, the rocking arm 32 is supported in a rocking manner on, for example, a plate-like element 29 by means of a rocking shaft 36, which is arranged in a middle position along the rod 32 to define a first short rod arm 32' and a second long rod arm 32", on which the first rocking arm 21 acts, and the second long rod arm 32" acts on the reduction device 31.

[0037] In the hinge according to the invention, the reduction device 31 is housed in a supporting body 37 resting on the plate-like element 29, the supporting body having a seat 38 for housing the reduction device 31, preferably in the form of a fluid, for example oil, linear reducer.

[0038] Both the plate-like element 29 and the supporting body 37 with the reduction device 31 are supported by a lower plate-like element 39 having seats 40 and 41 for receiving and / or engaging the front adjustment device 42 and the lateral adjustment device 43, respectively.

[0039] The front adjustment device 42 preferably includes a screw 42, which is engaged in a threaded hole 44 provided at the front in the housing of the fixed part 11, in particular, the screw 42 is engaged in a threaded hole 44 provided at the front in the half shell 11'; the screw 42 has a front cross-shaped recess and a rear head 42', which is engaged in the seat 40 to move the lower plate element 39 forward relative to the housing of the fixed part 11 formed by the half shells 11', 11".

[0040] The lateral adjustment device 43 is preferably in the form of an eccentric cam 43 having a cylindrical surface engaged in the seat 41 of the lower plate element 39 and a pin 43' fixed in a hole 45 of the plate element 29 to allow relative lateral sliding between the lower plate element 39 and the plate element 29 and thus lateral adjustment of the hinge.

[0041] The articulation also comprises vertical eccentric adjustment means, which are preferably arranged in the movable part 14 of the articulation.

[0042] To this end, the movable part 14 includes a box-shaped body 14', which is inserted and fixed in the seat 15 in the leaf 16 by means of screws inserted into corresponding holes of one or more flanges of the box-shaped body 14' itself; the movable part 14 also includes a connecting element 14", which is arranged in a vertically movable manner in a sliding seat 46 provided in the box-shaped body 14'.

[0043] The rockers 21, 22 are swingably connected to the connecting element 14" via respective hinge axes 18, 20 extending through the box-like body 14' and through the connecting element 14" to achieve a mutual connection that still allows vertical movement of the connecting element 14".

[0044] The connecting element 14 ″ has a receiving seat 47 for a vertical eccentric adjustment device which, according to the invention, comprises a retaining device which is suitable and arranged to retain the adjustment device in an adjusted position.

[0045] The vertical adjustment device is preferably in the form of an eccentric cam 48, which includes a cylindrical adjustment surface 48', which is rotatably mounted in a seat 47 of the connecting element 14", and the eccentric cam 48 includes a handle 48", which engages in a hole 49 of the box-like body 14' to apply a mutual displacement in the vertical direction of the connecting element 14" relative to the box-like body 14'.

[0046] Preferably, the retaining device according to the present invention comprises a plurality of facets 50 and / or knurlings on the cylindrical surface 48' of the eccentric cam 48, which engage with the corresponding inner surface of the seating portion 47 for the eccentric cam 48 in the connecting element 14".

[0047] Furthermore, in addition to or as an alternative to the above-mentioned retaining means, the retaining means preferably includes a retaining surface 51 extending circumferentially from the cylindrical surface 48' of the eccentric cam 48, the circumferential retaining surface 51 engaging with a corresponding front surface 52 of the accommodating seat 47 for the eccentric cam 48 to increase the friction between the components.

[0048] The adjustment device is accessible to the user from the front side of the furniture piece and / or from the inside of the door and thus allows easy and quick adjustment. Preferably, the adjustment device can have a control device which can be accessed from the front side of the furniture piece when the hinge is installed.

[0049] The rockers 21 , 22 have a flat or plate-like shape and are coplanar with the flat fixed part 11 of the hinge, allowing to limit the overall dimensions of the fixed part 11 itself, and the hinge axes 17 , 18 , 19 , 20 extend orthogonally to the extension plane of the rockers 21 , 22 .

[0050] Furthermore, preferably, the rocking lever 32 is also coplanar with the rocking levers 21 , 22 , and in particular, the rocking lever 32 is also coplanar with the rocking lever that operates the rocking lever 32 .

[0051] In order to allow reliable closing even in the presence of heavy and / or bulky doors, according to an embodiment of the invention, the elastic device of the hinge comprises an additional second coil spring 53, which is arranged coaxially with the first coil spring 25 of the elastic closing device to be operatively connected to one of the rockers 21, 22.

[0052] Preferably, at least one of the first 25 and second 53 helical springs is actuated directly or indirectly by an edge of at least one of said rockers 21 , 22 , wherein the edge is cam-shaped.

[0053] Preferably, the additional second coil spring 53 is arranged coaxially inside the first coil spring 25 of the closing elastic device or coaxially outside the first coil spring 25 of the closing elastic device.

[0054] Preferably, both the first spring 25 and the second spring 53 are housed in the housing body 26 and have one end acting on the wall of the support body 37 and an opposite end acting on the back wall of the housing body 26 .

[0055] Preferably, at least one of the rockers 21, 22 is coplanar with the elastic compression axis of at least one of the first coil spring 25 or the second coil spring 53; in addition, preferably, at least one of the rockers 21, 22 is coplanar with the movement axis of the reduction device 31.

[0056] When the hinge is opened and mounted, only parts of the rockers 21, 22 and the front faces of the fixed part 11 and the movable part 14 are visible, wherein the adjustment device is arranged on these front faces, while both the spiral springs 25, 53 and the reduction device 31 are not visible.

[0057] Figure 4 A second embodiment of a hinge according to the invention is shown, in which the reduction device 31 is actuated directly by the rocker via a surface and / or an extension of the rocker itself.

[0058] Preferably, the reduction device 31 may be directly actuated by at least one of the first connecting rocker 21 and the second connecting rocker 22 by means of one of the edges of the at least one of the first connecting rocker 21 and the second connecting rocker 22 .

[0059] In the case shown, the reduction device 31 is arranged parallel to the back wall of the fixed part 11 and is actuated by an extension or arm 54 extending from the rocker 21, however, a different arrangement structure of the reduction device 31 can be provided, for example, a reduction device can be provided along the side wall of the fixed part 11, and in order to actuate the reduction device 31, a protrusion with a drive surface or cam surface 33 on the rocker 21 can be used, similar to the protrusion provided in the case of indirect operation of the reduction device 31 by means of a rocking lever 32.

[0060] The hinge thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims.

[0061] Moreover, all the details may be replaced by other technically equivalent elements.

[0062] In practice, the materials used, as well as the dimensions and shapes, may be any, depending on requirements and the state of the art.

Claims

1. A hinge for a furniture door, the hinge (10) comprising: A fixing portion (11) having a flat shape, the fixing portion (11) being adapted to be inserted into a seating portion (12) provided in a thickness portion of an upper wall or a lower wall (13) of a piece of furniture; and a movable part (14) which can be connected to a door (16) of the furniture piece, the fixed part (11) and the movable part (14) being connected to each other in a swinging manner by means of a hinge system, the hinge system comprising a plurality of hinge axes (17, 18, 19, 20) and at least a first connecting rocker (21) and a second connecting rocker (22), the hinge also comprising: an elastic closing device for closing the hinge, the elastic closing device being operatively connected to one of the first connecting rocker (21) and the second connecting rocker (22), a deceleration device (31), the deceleration device (31) being adapted to decelerate at least a portion of the closing movement of the hinge, the deceleration device (31) being arranged inside the fixed part (11) of the hinge, and the deceleration device (31) being directly actuated by at least one of the first connecting rocker (21) and the second connecting rocker (22), or the deceleration device (31) being indirectly actuated by at least one of the first connecting rocker (21) and the second connecting rocker (22) by means of a transmission mechanism, adjustment means (42, 43, 48), said adjustment means (42, 43, 48) being located between said fixed part (11) and said movable part (14) of said hinge, said adjustment means comprising a vertical eccentric adjustment means, Characterized in that the vertical eccentric adjustment device comprises a retaining device, which is suitable and arranged to retain the vertical eccentric adjustment device in an adjusted position.

2. The hinge for a furniture door according to claim 1, characterized in that: The vertical eccentric adjustment device has a cylindrical adjustment surface (48'), and wherein a receiving seat (47) for the vertical eccentric adjustment device is provided in the fixed part (11) or the movable part (14) of the hinge, wherein the retaining device includes a plurality of small face portions (50) and / or knurled portions on the cylindrical adjustment surface (48') of the vertical eccentric adjustment device, and the cylindrical adjustment surface (48') with the small face portions and / or knurled portions engages with the corresponding inner surface of the receiving seat (47) for the vertical eccentric adjustment device in the fixed part (11) or the movable part (14) of the hinge.

3. The hinge for a furniture door according to claim 1 or 2, characterized in that: The retaining device comprises a retaining surface (51) extending circumferentially from the cylindrical adjustment surface (48') of the vertical eccentric adjustment device, the peripheral retaining surface (51) engaging with a corresponding front surface (52) of a receiving seat (47) for the vertical eccentric adjustment device in the fixed part (11) or the movable part (14) of the hinge.

4. The hinge for a furniture door according to claim 1 or 2, characterized in that: The reduction device (31) is directly actuated by at least one of the first connecting rocker (21) and the second connecting rocker (22) by means of a surface and / or an extension (54) of at least one of the first connecting rocker (21) and the second connecting rocker (22).

5. The hinge for a furniture door according to claim 1 or 2, characterized in that: The reduction device (31) is directly actuated by at least one of the first connecting rocker (21) and the second connecting rocker (22) by means of one of the edges of the at least one of the first connecting rocker (21) and the second connecting rocker (22).

6. The hinge for a furniture door according to claim 1 or 2, characterized in that: The transmission mechanism for indirectly actuating the reduction device (31) comprises a rocking arm (32) actuated by at least one of the first connecting rocking arm (21) and the second connecting rocking arm (22), the rocking arm (32) having a surface or part (34) suitable and arranged to actuate the reduction device (31) in turn.

7. The hinge for a furniture door according to claim 1 or 2, characterized in that: The first connecting rocker (21) and the second connecting rocker (22) are coplanar with the fixed part (11) of the hinge.

8. The hinge for a furniture door according to claim 1 or 2, characterized in that: The elastic closing device includes a first coil spring (25), wherein the elastic closing device includes an additional second coil spring (53), which is arranged coaxially with the first coil spring (25) of the elastic closing device so that the second coil spring (53) is operatively connected to one of the first connecting rocker (21) and the second connecting rocker (22).

9. The hinge for a furniture door according to claim 8, characterized in that: At least one of the first coil spring (25) and the second coil spring (53) is directly or indirectly actuated by an edge (28) of at least one of the first connecting rocker (21) and the second connecting rocker (22), wherein the edge (28) is cam-shaped; and / or where The reduction device (31) is directly or indirectly actuated by an edge of at least one of the first connecting rocker (21) and the second connecting rocker (22), wherein the edge is cam-shaped; and / or where The first connecting rocker (21) and the second connecting rocker (22) are formed as flat plate-like members, and the hinge axes (17, 18, 19, 20) are orthogonal to the flat plate-like members; wherein at least one of the first connecting rocker (21) and the second connecting rocker (22) comprises a cam-shaped edge (28); and wherein at least one of the first coil spring (25) and the second coil spring (53) is directly or indirectly actuated by the edge (28) of at least one of the first connecting rocker (21) and the second connecting rocker (22); and / or where The first connecting rocker (21) and the second connecting rocker (22) are formed as flat plate-like members, and the hinge axes (17, 18, 19, 20) are orthogonal to the flat plate-like members; wherein at least one of the first connecting rocker (21) and the second connecting rocker (22) comprises a cam-shaped rocker edge; and wherein the reduction device (31) is directly or indirectly actuated by the rocker edge of at least one of the first connecting rocker (21) and the second connecting rocker (22); and / or where The deceleration device (31) is directly actuated by at least one of the first connecting rocker (21) and the second connecting rocker (22) through a surface and / or an extension (54) of at least one of the first connecting rocker (21) and the second connecting rocker (22); and / or where The additional second coil spring (53) is coaxially arranged inside the first coil spring (25) of the elastic closing device, or the additional second coil spring (53) is coaxially arranged outside the first coil spring (25) of the elastic closing device.

10. The hinge for a furniture door according to claim 1 or 2, characterized in that: The transmission mechanism for indirectly actuating the reduction device (31) comprises a rocking lever (32) actuated by at least one of the first connecting rocking lever (21) and the second connecting rocking lever (22), the rocking lever (32) having a surface or part (34) adapted and arranged to actuate the reduction device (31) in turn; and / or where The transmission mechanism for indirectly actuating the reduction device comprises a rocking arm (32) hinged to the fixed part (11) and actuated by at least one of the first connecting rocking arm (21) and the second connecting rocking arm (22), wherein the rocking arm (32) is formed as a flat plate-like member and has a surface or part suitable and arranged to actuate the reduction device (31).

11. The hinge for a furniture door according to claim 10, characterized in that: The surface or portion of the rocker arm (32) is a cam-shaped edge of the rocker arm (32).

12. The hinge for a furniture door according to claim 1 or 2, characterized in that: The hinge (10) comprises an adjustment device (42, 43, 48) between the fixed part (11) and the movable part (14) of the hinge, the adjustment device having a control device which can be accessed from the front side of the furniture piece when the hinge is installed.

13. The hinge for a furniture door according to claim 8, characterized in that: The first connecting rocker (21) and the second connecting rocker (22) are coplanar with the fixed part (11) of the hinge; and / or where The first connecting rocker (21) and the second connecting rocker (22) are coplanar with each other; and / or where At least one of the first connecting rocker (21) and the second connecting rocker (22) is coplanar with the elastic compression axis of at least one of the first coil spring (25) or the second coil spring (53); and / or where At least one of the first connecting rocker (21) and the second connecting rocker (22) is coplanar with the movement axis of the reduction device (31).

14. The hinge for a furniture door according to claim 8, characterized in that: When the hinge is opened and installed, only part of the first connecting rocker (21) and part of the second connecting rocker (22), as well as the front surface of the fixed part (11) and the front surface of the movable part (14) are visible, wherein the adjustment device (42, 43, 48) is arranged on the front surface of the fixed part (11) and the front surface of the movable part (14), while the first coil spring (25) and the second coil spring (53), as well as the deceleration device (31) are not visible.

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