(19)
(11)EP 3 600 953 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
13.01.2021 Bulletin 2021/02

(21)Application number: 19726489.8

(22)Date of filing:  17.04.2019
(51)International Patent Classification (IPC): 
B60N 2/235(2006.01)
(86)International application number:
PCT/IB2019/053171
(87)International publication number:
WO 2019/215523 (14.11.2019 Gazette  2019/46)

(54)

DISCONTINUOUS RECLINER FOR A VEHICLE SEAT

DISKONTINUIERLICHER VERSTELLER FÜR EINEN FAHRZEUGSITZ

DISPOSITIF D'INCLINAISON DISCONTINU POUR SIÈGE DE VÉHICULE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 09.05.2018 IT 201800005223

(43)Date of publication of application:
05.02.2020 Bulletin 2020/06

(73)Proprietor: MARTUR ITALY S.R.L.
20121 Milano (IT)

(72)Inventors:
  • ÜSTÜNBERK, Can
    10095 Grugliasco (TO) (IT)
  • SPAGNOLI, Luigi
    10095 Grugliasco (TO) (IT)

(74)Representative: Robba, Pierpaolo 
Interpatent S.R.L. Via Caboto, 35
10129 Torino
10129 Torino (IT)


(56)References cited: : 
EP-A1- 1 724 149
DE-A1-102008 018 623
DE-A1-102009 058 449
US-A1- 2010 269 615
CN-A- 103 070 564
DE-A1-102009 029 858
US-A1- 2006 261 657
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to a discontinuous recliner for a vehicle seat.

    [0002] More particularly, the present invention relates to a discontinuous recliner for a vehicle seat having a simple structure and a limited number of components.

    Background Art



    [0003] Vehicle seats generally have a sliding function for pushing or pulling the seat cushion in a forward or backward direction, a height adjustment function for adjusting the height of the seat cushion and a reclining function for adjusting the inclination of the seat backrest relative to the seat cushion.

    [0004] This reclining function is generally implemented by a reclining device arranged at the junction between the seat cushion and the seat backrest.

    [0005] Discontinuous recliners are known from the state of the art which comprise a first disc-shaped plate connectable to a first bracket attached to the seat cushion and a second disc-shaped plate connectable to a second bracket attached to the seat backrest.

    [0006] In a rest condition, the first and second plates are locked in rotation relative to each other and the inclination of the seat backrest with respect to the seat cushion is fixed. However, by applying a torque, the first and second plates can be rotated relative to each other, thus obtaining a variation in the inclination of the seat backrest with respect to the seat cushion.

    [0007] To this purpose, the peripheral rim of a first one of said plates is provided with teeth on its inner surface and the second plate is provided with one or more locking pawls which are movable in the radial direction and which are provided with teeth at their outer surface.

    [0008] A first cam (or locking cam), biased by one or more springs, pushes the locking pawls outwardly, towards the peripheral rim of the first plate, so that the teeth of the locking pawls engage the teeth on the peripheral rim of the first plate, thus preventing a rotation of the plates relative to each other.

    [0009] By applying a torque sufficient to overcome the resistance of the spring(s), a second cam (or unlocking cam) is rotated and, upon rotating, it pulls the locking pawls inwardly, thus disengaging the teeth of said locking pawls from the teeth on the peripheral rim of the first plate and allowing a rotation of the plates relative to each other and a resulting adjustment of the inclination of the seat backrest with respect to the seat cushion.

    [0010] When the torque is removed, the action of the spring(s) on the first cam pushes again the locking pawls outwardly, against the peripheral rim of the first plate.

    [0011] Such discontinuous recliners are disclosed, for instance, in documents EP 1 724 149, CN 103507668, CN 202480915 and US 2003/155800.

    [0012] In general, such known discontinuous recliners comprise a high number of separate components, which involves several drawbacks.

    [0013] First of all, the presence of manufacturing tolerances of such components and/or clearances between them may cause malfunction of the recliner.

    [0014] Secondly, assembling the discontinuous recliner is expensive and time consuming.

    [0015] Thirdly, the high number of components lead to a considerable weight of the discontinuous recliner, which represents a severe drawback, as vehicle manufacturers constantly aim to reduce the vehicle overall weight. Document DE 102008018623 discloses a discontinuous recliner comprising a single actuating element for driving the recliner both from a locked condition, in which the first and second plates are locked in rotation relative to each other and the inclination of the seat backrest with respect to the seat cushion is fixed, to an unlocked condition, in which a rotation of the plates relative to each other is allowed and a resulting adjustment of the inclination of the seat backrest with respect to the seat cushion can be obtained, and from said unlocked condition to said locked condition. Document DE 102009029858 analogously discloses a discontinuous recliner comprising a single actuating element for driving the recliner both from a locked condition to an unlocked condition, and from said unlocked condition to said locked condition.

    [0016] Therefore, the main object of the present invention is to obviate such drawbacks, by providing a discontinuous recliner which comprises a reduced number of components.

    [0017] A further object of the present invention is to provide a discontinuous recliner which is simpler, lighter and more reliable than discontinuous recliners of prior art.

    [0018] These and other objects are achieved by a discontinuous recliner as claimed in the appended claims.

    Summary of Invention



    [0019] The discontinuous recliner according to the invention comprises a single actuating element which is configured to drive the locking pawl(s) both from the locking position to the unlocking position and from the unlocking position to the locking position.

    [0020] In a preferred embodiment of the invention, the discontinuous recliner comprises one or more locking pawls provided with teeth at their outer surface, each of said pawls being provided with a shaped profile at its inner surface and with a peg oriented towards the actuating element.

    [0021] Correspondingly, the actuating element is provided with a plurality of projections, one for each pawl, having a shaped profile, configured to cooperate with the shaped profile of the inner surface of the locking pawls for pushing said pawls outwardly in the radial direction, towards their locking position; the actuating element is also provided with a plurality of kidney-shaped slots, one for each pawl, so that the peg of each pawl penetrates into a corresponding slot of the actuating element and engages the edge of said slot, whereby, upon rotation of the actuating element, said pawls are pulled inwardly in the radial direction, towards their unlocking position.

    [0022] The discontinuous recliner also typically comprises one or more return springs for biasing the actuating element to a configuration in which the locking pawls are in their locking position.

    [0023] According to a preferred embodiment of the invention, the discontinuous recliner includes a single return spring and the actuating element comprises a seat for said return spring. Accordingly, the actuating element can also be considered as a spring disc.

    [0024] As the actuating element of the present invention drives the locking pawls both to their locking position and to their unlocking position and it further provides for a seat for the return spring, the overall number of components of the discontinuous recliner is significantly reduced with respect to prior art.

    [0025] This involves several remarkable advantages.

    [0026] First of all, the risk that manufacturing tolerances and/or clearances between the components lead to a malfunction of the recliner is strongly reduced.

    [0027] Secondly, the reduced number of parts leads to a reduction of the time needed for the assembly sequence cycle.

    [0028] Thirdly, the overall weight of the discontinuous recliner can be reduced with respect to known recliners, which represents a remarkable advantage for vehicle manufacturers.

    Brief Description of Drawings



    [0029] Further features and advantages of the invention will become more evident from the detailed description of some preferred embodiments thereof, given by way of nonlimiting example, with reference to the attached drawings, in which:

    Fig. 1
    Figure 1 is an exploded view of a discontinuous recliner according to a first preferred embodiment of the invention;

    Fig. 2
    Figure 2 is a front view of the discontinuous recliner of Figure 1, with the first plate removed for ease of understanding;

    Fig. 3
    Figure 3 is a front view of the discontinuous recliner of Figure 1, with the first plate and the actuating element removed;

    Fig. 4
    Figure 4 is a see-through perspective view of the discontinuous recliner of Figure 1;

    Fig. 5
    Figure 5 is a perspective view of the actuating element of the discontinuous recliner of Figures 1 - 4;

    Fig. 6
    Figure 6 is an exploded view of a discontinuous recliner according to a second preferred embodiment of the invention;

    Fig. 7
    Figure 7 is a perspective view of the actuating element of the discontinuous recliner of Figure 6;

    Fig. 8
    Figure 8 is a perspective view of the second disc-shaped plate element of the discontinuous recliner of Figure 6;

    Fig. 9a
    Figure 9a shows the discontinuous recliner of Figure 6 in a locking position;

    Fig. 9b
    Figure 9b shows the discontinuous recliner of Figure 6 in an unlocking locking position;

    Fig. 10a
    Figure 10a shows the discontinuous recliner of Figure 6 in a locking position;

    Fig. 10b Figure 10b shows the discontinuous recliner of Figure 6 in an un locking position;

    Fig. 11a
    Figure 11a is an enlarged view of the central portion of Figure 10a;

    Fig. 11b
    Figure 11b is an enlarged view of the central portion of Figure 10b;

    Fig. 12
    Figure 12 is a perspective view of the actuating element of the discontinuous recliner of Figure 6 from a different point of view.


    Description of Embodiments



    [0030] With reference to Figures 1 to 4, a discontinuous recliner 1 according to a first embodiment of the invention is shown.

    [0031] In a per se known manner, said discontinuous recliner 1 comprises a first disc-shaped plate 2, which is provided with first engaging means for being connected to a first bracket that can be attached to a seat cushion (or to a seat backrest), and a second disc-shaped plate 3, which is provided with second engaging means for being connected to a second bracket that can be attached to a seat backrest (or to a seat cushion).

    [0032] The first and second plates 2, 3 substantially have the same diameter so that they can be coupled to each other. To this purpose, the discontinuous recliner 1 may further comprise a cover 4, namely an annular cover, for coupling together the first and second plates 2, 3.

    [0033] The first plate 2 comprises a peripheral rim 2a oriented towards the second plate 3 and provided with teeth on its inner surface, or at least on sections of its inner surface.

    [0034] The second plate 3 comprises, on its surface oriented towards the first plate, a plurality of radial guiding grooves 5 receiving respective locking pawls 7 (three in the shown embodiment), which are movable in the radial direction along said guiding grooves. The guiding grooves 5 and the locking pawls 7 are preferably equally spaced along the circumference of the second plate 3 (i.e. they are arranged at 120° relative each other in the shown embodiment).

    [0035] The locking pawls 7 have a curved outer surface 7a, having substantially the same curvature radius as the first and second plates and provided with teeth. Accordingly, the teeth of the locking pawls can engage the teeth of the inner surface of the peripheral rim 2a of the first plate 2 when said locking pawls are moved in the radial direction to their outermost position (locking position), thus preventing any relative rotation between the first and second plate. On the other hand, when the locking pawls 7 are moved inwardly in the radial direction, away from the peripheral rim 2a of the first plate 2 (unlocking position), a relative rotation between the first and second plate is allowed.

    [0036] According to the invention, the discontinuous recliner 1 is provided with a single actuating element 9 (shown in greater detail in Figure 5) for driving the locking pawls 7 both from their unlocking position to their locking position and from their locking position to their unlocking position.

    [0037] The actuating element 9 lies on the surface of the first plate 2 oriented towards the second plate 3 and it has a flat body 9a, preferably having the overall shape of a disc. The first plate 2 is correspondingly provided with a circular seat 10 receiving the actuating element 9.

    [0038] In order to drive the locking pawls 7 from their unlocking position to their locking position, the actuating element 9 comprises a plurality of projections 11 (one for each locking pawl 7, i.e. three in the shown embodiment) protruding towards the second plate 3; the outer surface 11a in the radial direction of each projection 11 has a shaped profile (e.g. a cam-shaped profile) and, correspondingly, the inner surface 7b in the radial direction of each locking pawl 7 has a correspondingly shaped profile (e.g. a cam-shaped profile), whereby the shaped profiles of the outer surface 11a of the projections 11 of the actuating element 9 and the shaped profiles of the inner surface 7b of the locking pawls 7 cooperate for pushing said locking pawls 7 to their outermost, locking position.

    [0039] A return spring 19 biases the actuating element 9 towards a position in which the shaped profiles of the outer surface 11a of the projections 11 of the actuating element 9 push the locking pawls 7 to said locking position.

    [0040] In the shown embodiment, the return spring 19 has the shape of a spiral, with a first, outer end 19a inserted in a hole provided in the second plate 3, and a second, inner end 19b wound to form a square and fitted on a square boss 13 provided on the actuating element 9.

    [0041] In order to drive the locking pawls 7 from their locking position to their unlocking position, the body 9a of the actuating element 9 comprises a plurality of kidney-shaped slots 15 (one for each locking pawl 7, i.e. three in the shown embodiment); each slot 15 has a first section 15a which is farther from the center of the body 9a of the actuating element 9, and a second section 15b that progressively extends closer to the center of said body 9a of said actuating element. Correspondingly, each locking pawl 7 is provided with a peg 17 projecting towards the first plate and arranged so as to penetrate into a corresponding slot 15 and to engage the edge of said slot. More particularly, with the locking pawls in their locking position, the pegs 17 of the locking pawls 7 engage the edge of the respective slots 15 at the first section 15a of sais slots.

    [0042] By applying a torque in the appropriate direction (in the direction of arrow F in the shown embodiment), the actuating element 9 is rotated, overcoming the resistance of the return spring 19.

    [0043] As the actuating element 9 rotates, the pegs 17 of the locking pawls 7 slide along the respective slots 15 of said actuating element. When the pegs 17 enter the second section 15b of said slots, the locking pawls 7 are progressively pulled inwardly, away from the peripheral rim of the first plate; correspondingly the shaped profiles of the outer surface 11a of the projections 11 of the actuating element 9 and the shaped profiles of the inner surface 7b of the locking pawls 7 accommodate such inward movement of the locking pawls. As a result, the locking pawls 7 are brought to their unlocking position, in which the teeth on the outer surface 7a of said pawls no longer engage the teeth on the inner surface of the peripheral rim of the first plate.

    [0044] With the pawls in such unlocking position, the first and second plates can be rotated relative to each other, so that the user can adjust the inclination of the seat backrest with respect to the seat cushion.

    [0045] When the torque is removed, the return spring 19 will urge the actuating element 9 to rotate in the opposite direction, thus bringing back the locking pawls 7 to their locking position.

    [0046] Thanks to the provision of the single actuating element 9, which is capable of driving the locking pawls 7 both from their locking position to their unlocking position and from their unlocking position to their locking position, the overall number of components is considerably lower than in known discontinuous recliners (namely, two plates, one actuating element, one spring, one or more locking pawls).

    [0047] Accordingly, the risk of malfunction of the discontinuous recliner 1 due to manufacturing tolerances and/or clearances between the components is strongly reduced.

    [0048] Moreover, the discontinuous recliner 1 can be assembled in an easier and quicker way than known discontinuous recliners.

    [0049] Last but not least, the overall weight of the discontinuous recliner 1 can be reduced with respect to known recliners.

    [0050] The actuating element can be made of any suitable material, such as steel. It can be manufactured by any appropriate techniques, such as casting or sintering.

    [0051] With reference now to Figures 6 to 12, a discontinuous recliner 1 according to a second embodiment of the invention is shown.

    [0052] The structure and operation of the discontinuous recliner 1 shown in Figures 6 - 12 are very similar to those of the discontinuous recliner shown in Figure 1 - 4.

    [0053] Accordingly, components that are identical or similar to respective components already described with reference to the first embodiment are denoted by the same references and they will not be described in detail in the following.

    [0054] In this second embodiment, too, the discontinuous recliner 1 comprises a first disc-shaped plate 2 and a second disc-shaped plate 3, which are coupled to each other.

    [0055] To this purpose, the discontinuous recliner 1 may further comprise a cover 4, namely an annular cover, for coupling together the first and second plates 2, 3.

    [0056] In this second embodiment, too, the first plate 2 comprises a peripheral rim oriented towards the second plate 3 and provided with teeth on its inner surface, or at least on sections of its inner surface and the second plate 3 comprises, on its surface oriented towards the first plate, a plurality of radial guiding grooves receiving respective locking pawls 7 (which, in this second embodiment are four, arranged at 90° relative each other).

    [0057] In this second embodiment, too, the teeth of the locking pawls 7 can engage the teeth of the inner surface of the peripheral rim of the first plate 2 when said locking pawls are moved in the radial direction to their outermost position (locking position), and they can be disengaged from the teeth of the inner surface of the peripheral rim of said first plate 2 when said locking pawls are moved inwardly in the radial direction (unlocking position), thus allowing a relative rotation between the first and second plate.

    [0058] In this second embodiment, too, the discontinuous recliner 1 is provided with a single actuating element 9 for driving the locking pawls 7 both from their unlocking position to their locking position and from their locking position to their unlocking position: in order to drive the locking pawls 7 from their unlocking position to their locking position, the actuating element 9 comprises a plurality of projections 11 cooperating with the profiles of the locking pawls cooperate for pushing said locking pawls 7 to their outermost, locking position; in order to drive the locking pawls 7 from their locking position to their unlocking position, the actuating element 9 comprises a plurality of kidney-shaped slots 15 and, correspondingly, each locking pawl 7 is provided with a peg 17, penetrating into a corresponding slot 15 and engaging the edge of said slot.

    [0059] In this second embodiment, too, a return spring 19 (preferably having the shape of a spiral) biases the actuating element 9 towards the locking position.

    [0060] As better shown in Figures 7 and 8, the discontinuous recliner 1 according to this second preferred embodiment differs from the one of the previously described, first preferred embodiment in that the actuating element in that the actuating element 9 is provided, on its on its surface oriented towards the second plate 3, with a one or more humps 21 which engage corresponding window(s) 23 provided in said second plate 3.

    [0061] The humps 21 on the actuating element, as well as the windows 23 in the second plate preferably are equally spaced along the circumference of said actuating element and of said second plate, respectively.

    [0062] In detail, in the shown embodiment, the actuating element 9, is provided, on its on its surface oriented towards the second plate 3, with two humps 21 arranged at 180° relative each other, and the second plate 3 is correspondingly provided with two windows 23, arranged at 180° relative each other, whereby each hump 21 engages a corresponding window 23.

    [0063] Advantageously, the engagement between the humps 21 of the actuating element 9 and the windows 23 of the second plate 3 allows to protect the discontinuous recliner 1 from excessive load exerted by the user when switching the recliner 1 from the locking position to the unlocking position.

    [0064] In this respect, in Figures 9a and 9b the discontinuous recliner 1 according to the invention is shown along with the handle 10 triggered by the user from switching the recliner 1 from the locking position to the unlocking position.

    [0065] In general, the users tend to apply an excessive load on the handle 10 when they want to unlock the recliner and such excessive loads can damage the internal components of the recliner itself, as the internal components of said recliner could rotate beyond the correct working range.

    [0066] According to the present invention, when the user trigger the handle 10, the discontinuous recliner 1 is brought from the locking position (see also Figures 10a, 11a) to the unlocking position (see also Figures 10b, 11b), and the first plate 2 and the second plate 3 are free to rotate relative to each other. However, an excessive load on the internal components of the recliner 1 is prevented, as the path of the actuating element 9 is advantageously limited by the engagement of its humps 21 with the windows 23 of the second plate 3.

    [0067] Accordingly, the relative rotation between the first and second plate 2, 3 in the unlocking position will be limited to a maximum angle θ, which is set by the length of the windows 23, so that a rotation beyond the correct working range due to an excessive load on the handle 10 is effectively prevented by adequately designing such windows 23.

    [0068] In this way, the internal components of the discontinuous recliner 1 are effectively protected from excessive loads.

    [0069] With reference to Figure 12, the discontinuous recliner 1 according to this second preferred embodiment differs from the one of the previously described, first preferred embodiment in that the actuating element in that the actuating element 9 is provided, on its on its surface oriented towards the first plate 2, with a hub 25 protruding from said surface thereof.

    [0070] The provision of such hub 25 improves the stabilization of the discontinuous recliner 1 according to the invention.

    [0071] Moreover, the provision of such hub 25 improves the synchronization between the recliners of the same vehicle seat, this avoiding potential delay between two recliners of the same vehicle seat.

    [0072] This description of preferred embodiments of the invention has been given merely by way of example and several variants and modifications within the reach of the person skilled in the art can be envisaged, without departing from the scope of the invention as defined by the appended claims.

    [0073] By way of example, the number of locking pawls may be different from the ones shown in the illustrated embodiment.

    [0074] By way of further example, more than one return spring (e.g. a number of springs equal to the number of locking pawls) may be provided.


    Claims

    1. Discontinuous recliner (1) for a vehicle seat, which discontinuous recliner (1) comprises a first disc-shaped plate (2) and a second disc-shaped plate (3), said first and second plates substantially having the same diameter so that they can be coupled to each other, wherein said first plate (2) comprises a peripheral rim (2a) oriented towards said second plate (3) and provided with teeth on its inner surface, and wherein said second plate (3) is provided with one or more locking pawls (7), which have an outer surface (7a) in the radial direction provided with teeth and which are movable in the radial direction from a locking position, in which the teeth on their outer surface (7a) engage the teeth on the inner surface of said peripheral rim of said first plate, to an unlocking position, in which the teeth on their outer surface (7a) are spaced apart from the teeth on the inner surface of said peripheral rim of said first plate, and vice versa, wherein said discontinuous recliner (1) is provided with a single actuating element (9) for driving said locking pawls (7) both from said unlocking position to said locking position and from said locking position to said unlocking position and with a single return spring (19), having the shape of a spiral, with a first, outer end (19a) inserted into a hole provided in said second plate (3), and a second, inner end (19b) wound to form a square and fitted on a square boss (13) provided on said actuating element (9), characterized in that said actuating element (9) is provided, on its surface oriented towards said first plate (2), with a hub (25) protruding from said surface thereof, whereby said hub (25) penetrates into a matching hole centrally provided in said first plate (2), and in that said actuating element (9) is provided, on its surface oriented towards said second plate (3), with a cylindrical protrusion, whereby said protrusion penetrates into a matching hole centrally provided in said second plate (3)..
     
    2. Discontinuous recliner (1) according to claim 1, wherein said actuating element (9) has a flat, disc-shaped body (9a), which lies on the surface of said first plate (2) oriented towards said second plate (3).
     
    3. Discontinuous recliner (1) according to claim 1 or 2, wherein said actuating element (9) comprises a plurality of projections (11), one for each of said locking pawls (7), protruding towards said second plate (3), wherein the outer surface (11a) in the radial direction of each projection has a shaped profile and wherein the inner surface (7b) in the radial direction of each locking pawl (7) has a corresponding shaped profile, the shaped profiles of said outer surface (11a) of said projections (11) of said actuating element (9) and the shaped profiles of said inner surface (7b) of said locking pawls (7) cooperating for pushing said locking pawls (7) to said locking position.
     
    4. Discontinuous recliner (1) according to any of the preceding claims, wherein said actuating element (9) comprises a plurality of slots (15), one for each of said locking pawls, which slots have a first section (15a) which is farther from the center of the actuating element, and a second section (15b) that progressively extends closer to the center of said actuating element, and wherein each of said locking pawl (7) is provided with a peg (17) projecting towards said first plate and arranged so as to penetrate into a corresponding slot (15) of said actuating element and to engage the edge of said slot.
     
    5. Discontinuous recliner (1) according to any of the preceding claims, wherein said locking pawls (7) are equally spaced along the circumference of said second plate (3).
     
    6. Discontinuous recliner (1) according to any of the preceding claims, wherein said second plate (3) is provided with one or more radial guiding grooves (5), each of said radial guiding grooves receiving and guiding a respective locking pawl (7).
     
    7. Discontinuous recliner (1) according to any of the preceding claims, wherein said recliner is provided with an annular cover (4) for coupling together said first and second plates (2, 3).
     
    8. Discontinuous recliner (1) according to any of the preceding claims, wherein said actuating element (9) is provided, on its surface oriented towards said second plate (3), with a one or more humps (21), which engage corresponding one or more window(s) (23) provided in said second plate (3).
     
    9. Discontinuous recliner (1) according to claim 8, wherein said humps (21) are equally spaced along the circumference of said actuating element and said windows (23) are equally spaced along the circumference of said second plate.
     
    10. Discontinuous recliner (1) according to claim 9, wherein said actuating element (9), is provided, on its on its surface oriented towards said second plate (3), with two humps (21) arranged at 180° relative each other, and said second plate (3) is correspondingly provided with two windows (23), arranged at 180° relative each other.
     
    11. Discontinuous recliner (1) according to claim 8 or 9 or 10, wherein said humps (21) are arranged on said cylindrical protrusion provided in the actuating element (9), on its surface oriented towards said second plate (3), and wherein said windows (23) are provided along the circumference of said central hole provided in said second plate (3), whereby, when said cylindrical protrusion of said actuating element penetrates into said central hole of said second plate, said hump(s) (21) which engage said corresponding window(s) (23).
     
    12. Vehicle seat, comprising a seat cushion and a seat backrest pivotally connected to said seat cushion, characterized in that it comprises a discontinuous recliner (1) according to any of the claims 1 to 11, wherein one of said first and second plates is attached to said seat cushion and the other one of said first and second plates is attached to said seat backrest.
     


    Ansprüche

    1. Diskontinuierlicher Versteller für einen Fahrzeugsitz, wobei der diskontinuierliche Versteller (1) eine erste scheibenförmige Platte (2) und eine zweite scheibenförmige Platte (3) aufweist, wobei die erste und die zweite Platte im Wesentlichen den selben Durchmesser haben, sodass sie aneinander gekoppelt werden können, wobei die erste Platte (2) einen äußeren Rand (2a) aufweist, der hin zu der zweiten Platte (3) gerichtet ist und an seiner Innenfläche mit Zähnen versehen ist, und wobei die zweite Platte (3) mit einer oder mehreren Sperrklauen (7) versehen ist, die eine in radialer Richtung mit Zähnen versehen Außenfläche (7a) haben und die in radialer Richtung aus einer Verriegelungsposition, in welcher die Zähne an ihrer Außenfläche (7a) in die Zähne an der Innenfläche des äußeren Randes der ersten Platte eingreifen, in eine Entriegelungsposition, in der die Zähne an ihrer Außenfläche (7a) in einem Abstand von den Zähnen an der Innenfläche des äußeren Rands der ersten Platte angeordnet sind, und umgekehrt beweglich sind, wobei der diskontinuierliche Versteller (1) mit einem einzelnen Betätigungselement (9) zum Bewegen der Sperrklauen (7) sowohl aus ihrer Entriegelungsposition in die Verriegelungsposition als auch aus ihrer Verriegelungsposition in die Entriegelungsposition und mit einer einzelnen Rückstellfeder (19) versehen ist, welche die Form einer Spirale hat, wobei ein erstes, äußeres Ende (19a) in einem Loch angeordnet ist, das in der zweiten Platte (3) vorgesehen ist, und ein zweites, inneres Ende (19b) zu einem Rechteck aufgewickelt und auf einen rechteckigen Vorsprung (13) montiert ist, der an dem Betätigungselement (9) vorgesehen ist, dadurch gekennzeichnet, dass das Betätigungselement (9) an seiner der ersten Platte (2) zugewandten Oberfläche mit einer Nabe (25) versehen ist, die von dieser Oberfläche vorsteht, wobei die Nabe (25) in ein passendes Loch hineinragt, das mittig in der ersten Platte (2) angeordnet ist, und dass das Betätigungselement (9) an seiner der zweiten Platte (3) zugewandten Oberfläche mit einem zylindrischen Vorsprung versehen ist, wobei der Vorsprung in ein passendes Loch ragt, das mittig in der zweiten Platte (3) angeordnet ist.
     
    2. Diskontinuierlicher Versteller (1) nach Anspruch 1, wobei das Betätigungselement (9) einen flachen, scheibenförmigen Körper (9a) hat, der auf der Oberfläche der ersten Platte (2) liegt, die der zweiten Platte (3) zugewandt ist.
     
    3. Diskontinuierlicher Versteller (1) nach Anspruch 1 oder 2, wobei das Betätigungselement (9) mehrere zu der zweiten Platte (3) vorstehende Vorsprünge (11) aufweist, nämlich einen für jede der Sperrklauen (7), wobei die Außenfläche (11a) in radialer Richtung jedes Vorsprungs einen geformten Umriss hat und wobei die Innenfläche (7b) in radialer Richtung von jeder Sperrklaue (7) einen entsprechend geformten Umriss hat, wobei die geformten Umrisse der Außenfläche (11a) der Vorsprünge (11) des Betätigungselements (9) und die geformten Umrisse der Innenfläche (7b) der Sperrklauen (7) zusammenwirken, um die Sperrklauen (7) in die Verriegelungsposition zu schieben.
     
    4. Diskontinuierlicher Versteller (1) nach einem der vorstehenden Ansprüche, wobei das Betätigungselement (9) mehrere Schlitze (15) aufweist, nämlich einen für jede Sperrklaue, wobei die Schlitze einen ersten Abschnitt (15a), der weiter von dem Zentrum des Betätigungselements entfernt ist, und einen zweiten Abschnitt (15b), der sich zunehmend näher an das Zentrum des Betätigungselements erstreckt, haben und wobei jede der Sperrklauen (7) mit einem Zapfen (17) versehen ist, der zu der ersten Platte hin ragt und so angeordnet ist, dass er in einen entsprechenden Schlitz (15) des Betätigungselements hineinragt und an dem Rand des Schlitzes anliegt.
     
    5. Diskontinuierlicher Versteller (1) nach einem der vorstehenden Ansprüche, wobei die Sperrklauen (7) in gleichem Abstand entlang des Umfangs der zweiten Platte (3) angeordnet sind.
     
    6. Diskontinuierlicher Versteller (1) nach einem der vorstehenden Ansprüche, wobei die zweite Platte (3) mit einer oder mehreren radialen Führungsnuten (5) versehen ist und jede der radialen Führungsnuten eine entsprechende Sperrklaue (7) aufnimmt und führt.
     
    7. Diskontinuierlicher Versteller (1) nach einem der vorstehenden Ansprüche, wobei der Versteller mit einer ringförmigen Abdeckung (4) versehen ist, um die erste und die zweite Platte (2, 3) aneinander zu koppeln.
     
    8. Diskontinuierlicher Versteller (1) nach einem der vorstehenden Ansprüche, wobei das Betätigungselement (9) an seiner der zweiten Platte zugewandten Oberfläche (3) mit einem oder mehreren Buckeln (21) versehen ist, die in ein oder mehrere passende Fenster (23) eingreifen, die in der zweiten Platte (3) vorgesehen sind.
     
    9. Diskontinuierlicher Versteller (1) nach Anspruch 8, wobei die Buckel (21) in gleichem Abstand voneinander entlang des Umfangs des Betätigungselements und die Fenster (23) in gleichem Abstand entlang des Umfangs der zweiten Platte angeordnet sind.
     
    10. Diskontinuierlicher Versteller (1) nach Anspruch 9, wobei das Betätigungselement (9) an seiner der zweiten Platte (3) zugewandten Oberfläche mit zwei Buckeln (21) versehen ist, die in einem Winkel von 180° zueinander angeordnet sind, und die zweite Platte (3) dementsprechend mit zwei Fenstern (23) versehen ist, die in einem Winkel von 180° zueinander angeordnet sind.
     
    11. Diskontinuierlicher Versteller (1) nach einem der Ansprüche 8 oder 9 oder 10, wobei die Buckel (21) auf dem zylindrischen Vorsprung an dem Betätigungselement (9) an seiner der zweiten Platte (3) zugewandten Oberfläche angeordnet sind, und wobei die Fenster (23) entlang des Umfangs des mittleren Lochs angeordnet sind, das in der zweiten Platte (3) angeordnet ist, wodurch der bzw. die Buckel (21) in das bzw. die entsprechenden Fenster (23) eingreifen, wenn die zylindrischen Vorsprünge des Betätigungselements in das mittlere Loch der zweiten Platte hineinragen.
     
    12. Fahrzeugsitz mit einer Sitzfläche und einer Rückenlehne, die schwenkbar an der Sitzfläche angebracht ist, dadurch gekennzeichnet, dass er einen diskontinuierlichen Versteller (1) nach einem der Ansprüche 1 bis 11 aufweist, wobei entweder die erste oder die zweite Platte an der Sitzfläche und die andere Platte an der Rückenlehne angebracht ist.
     


    Revendications

    1. Dispositif d'inclinaison discontinu (1) pour un siège de véhicule, lequel dispositif d'inclinaison discontinu (1) comprend une première plaque en forme de disque (2) et une seconde plaque en forme de disque (3), lesdites première et seconde plaques ayant sensiblement le même diamètre de façon à pouvoir être couplées l'une à l'autre, dans lequel ladite première plaque (2) comprend un rebord périphérique (2a) orienté vers ladite seconde plaque (3) et pourvu de dents sur sa surface interne, et dans lequel ladite seconde plaque (3) est pourvue d'un ou de plusieurs cliquets de verrouillage (7), qui ont une surface externe (7a) dans la direction radiale pourvue de dents et qui sont mobiles dans la direction radiale d'une position de verrouillage, dans laquelle les dents sur leur surface externe (7a) s'engrènent avec les dents sur la surface interne dudit rebord périphérique de ladite première plaque, à une position de déverrouillage, dans laquelle les dents sur leur surface externe (7a) sont espacées des dents sur la surface interne dudit rebord périphérique de ladite première plaque, et vice versa, dans lequel ledit dispositif d'inclinaison discontinu (1) est pourvu d'un seul élément d'actionnement (9) pour entraîner lesdits cliquets de verrouillage (7) à la fois de ladite position de déverrouillage à ladite position de verrouillage et de ladite position de verrouillage à ladite position de déverrouillage et d'un seul ressort de rappel (19), ayant la forme d'une spirale, avec une première extrémité externe (19a) insérée dans un trou prévu dans ladite seconde plaque (3), et d'une seconde extrémité interne (19b) enroulée pour former un carré et ajustée sur un bossage carré (13) prévu sur ledit élément d'actionnement (9), caractérisé en ce que ledit élément d'actionnement (9) est pourvu, sur sa surface orientée vers ladite première plaque (2), d'un moyeu (25) dépassant de sadite surface, moyennant quoi ledit moyeu (25) pénètre dans un trou concordant prévu au centre dans ladite première plaque (2), et en ce que ledit élément d'actionnement (9) est pourvu, sur sa surface orientée vers ladite seconde plaque (3), d'une protubérance cylindrique, moyennant quoi ladite protubérance pénètre dans un trou concordant prévu au centre dans ladite seconde plaque (3).
     
    2. Dispositif d'inclinaison discontinu (1) selon la revendication 1, dans lequel ledit élément d'actionnement (9) a un corps en forme de disque plat (9a), qui se trouve sur la surface de ladite première plaque (2) orientée vers ladite seconde plaque (3).
     
    3. Dispositif d'inclinaison discontinu (1) selon la revendication 1 ou 2, dans lequel ledit élément d'actionnement (9) comprend une pluralité de saillies (11), une pour chacun desdits cliquets de verrouillage (7), dépassant vers ladite seconde plaque (3), dans lequel la surface externe (11a) dans la direction radiale de chaque saillie a un profil façonné et dans lequel la surface interne (7b) dans la direction radiale de chaque cliquet de verrouillage (7) a un profil façonné correspondant, les profils façonnés de ladite surface externe (11a) desdites saillies (11) dudit élément d'actionnement (9) et les profils façonnés de ladite surface interne (7b) desdits cliquets de verrouillage (7) coopérant pour pousser lesdits cliquets de verrouillage (7) vers ladite position de verrouillage.
     
    4. Dispositif d'inclinaison discontinu (1) selon l'une quelconque des revendications précédentes, dans lequel ledit élément d'actionnement (9) comprend une pluralité de fentes (15), une pour chacun desdits cliquets de verrouillage, lesquelles fentes ont une première section (15a) qui est plus éloignée du centre de l'élément d'actionnement, et une seconde section (15b) qui s'étend progressivement plus près du centre dudit élément d'actionnement, et dans lequel chacun desdits cliquets de verrouillage (7) est pourvu d'un goujon (17) faisant saillie vers ladite première plaque et agencé de façon à pénétrer dans une fente (15) correspondante dudit élément d'actionnement et pour s'engager avec le bord de ladite fente.
     
    5. Dispositif d'inclinaison discontinu (1) selon l'une quelconque des revendications précédentes, dans lequel lesdits cliquets de verrouillage (7) sont espacés de façon égale le long de la circonférence de ladite seconde plaque (3).
     
    6. Dispositif d'inclinaison discontinu (1) selon l'une quelconque des revendications précédentes, dans lequel ladite seconde plaque (3) est pourvue d'une ou de plusieurs rainures de guidage radiales (5), chacune desdites rainures de guidage radiales recevant et guidant un cliquet de verrouillage (7) respectif.
     
    7. Dispositif d'inclinaison discontinu (1) selon l'une quelconque des revendications précédentes, dans lequel ledit dispositif d'inclinaison est pourvu d'un couvercle annulaire (4) pour coupler ensemble lesdites première et seconde plaques (2, 3).
     
    8. Dispositif d'inclinaison discontinu (1) selon l'une quelconque des revendications précédentes, dans lequel ledit élément d'actionnement (9) est pourvu, sur sa surface orientée vers ladite seconde plaque (3), d'une ou de plusieurs crêtes (21), qui s'engagent avec une ou plusieurs fenêtres (23) correspondantes prévues dans ladite seconde plaque (3).
     
    9. Dispositif d'inclinaison discontinu (1) selon la revendication 8, dans lequel lesdites crêtes (21) sont espacées de façon égale le long de la circonférence dudit élément d'actionnement et lesdites fenêtres (23) sont espacées de façon égale le long de la circonférence de ladite seconde plaque.
     
    10. Dispositif d'inclinaison discontinu (1) selon la revendication 9, dans lequel ledit élément d'actionnement (9), est pourvu, sur sa surface orientée vers ladite seconde plaque (3), de deux crêtes (21) agencées à 180° l'une par rapport à l'autre, et ladite seconde plaque (3) est pourvue de façon correspondante de deux fenêtres (23), agencées à 180° l'une par rapport à l'autre.
     
    11. Dispositif d'inclinaison discontinu (1) selon la revendication 8 ou 9 ou 10, dans lequel lesdites crêtes (21) sont agencées sur ladite protubérance cylindrique prévue dans l'élément d'actionnement (9), sur sa surface orientée vers ladite seconde plaque (3), et dans lequel lesdites fenêtres (23) sont prévues le long de la circonférence dudit trou central prévu dans ladite seconde plaque (3), moyennant quoi, lorsque ladite protubérance cylindrique dudit élément d'actionnement pénètre dans ledit trou central de ladite seconde plaque, ladite ou lesdites crêtes (21) s'engagent avec ladite ou lesdites fenêtres (23) correspondantes.
     
    12. Siège de véhicule, comprenant un coussin de siège et un dossier de siège raccordé pivotant audit coussin de siège, caractérisé en ce qu'il comprend un dispositif d'inclinaison discontinu (1) selon l'une quelconque des revendications 1 à 11, dans lequel l'une desdites première et seconde plaques est attachée audit coussin de siège et l'autre desdites première et seconde plaques est attachée audit dossier de siège.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description