MXPA99009259A - Single control handle release mechanism for use with a vehicle seat - Google Patents

Abstract

A single control handle release mechanism for a vehicle seat hinge has a mounting plate attachable to a seat cushion, a sector plate pivotally mounted on the mounting plate for selective pivotal movement about a first lower pivot axis, and a rotational control plate pivotally mounted on the sector plate for selective pivotal movement about a second upper pivot axis and attachable to a seatback. The vehicle seatback is pivotally movable about the first lower pivot axis between a plurality of angular positions and forwardly foldable about the second upper pivot axis between a design position and a forwardly dumped position. The release mechanism comprisesa primary latch that pivotally fixes the sector plate with respect to the mounting plate, and a secondary latch that pivotally fixes the rotational control plate with respect to the sector plate. A manually grippable handle effects latched and unlatched configurations of the primary latch. A link arm is operatively interconnected between the secondary latch and the seat cushion for movement of the secondary latch from a latched configuration to an unlatched configuration upon relative movement of the link arm and the secondary latch with respect to each other beyond a threshold position, thereby to release the vehicle seatback to be forwardly foldable over the vehicle seat cushion about the second upper pivot axis, as aforesaid.

Description

MECHANISM OF RELEASE OF THE SINGLE CONTROL HANDLE TO BE USED WITH A VEHICLE SEAT FIELD OF THE INVENTION The present invention relates to release mechanisms for use with vehicular seat joints having two pivot shafts to allow a seat backrest to recline and bend forward to a horizontal position overturned forward, and more particularly. to unique release mechanisms of the control handle for use with such vehicle seat articulations. BACKGROUND OF THE INVENTION [0002] Passenger vehicles, especially combined passenger and utility vehicles, commonly have front and rear seats that both recline and bend forward to a forward-facing position, placed substantially horizontally, as shown in FIG. Select by a user, in order to adapt to the growing demand for more functional vehicle interiors. The positioning of a vehicle seat in its overturned position, bent forward, allows to carry large or elongated objects inside the vehicle and provides a a flat, substantially horizontal, convenient surface for articles that could be used in a vehicle, such as suitcases, laptops, and also food and beverages. 5 There are several prior art vehicle seats, whose vehicle seats are folded forward to a forward position, positioned in a substantially horizontal manner. Such vehicle seats typically include a pair of vehicle seat inserts, each joint having a mounting plate securely attached to a vehicle seat cushion. A sector plate associated with the backrest of the seat is assembled in a pivoting on the mounting plate for the rotary movement about a lower pivot axis. A rotary control plate is rotatably mounted on the sector plate for rotational movement about an axis of rotation. pivot upper and securely fastened to a vehicle seat backrest. In such prior art vehicle seats, the seatback can move selectively rotatable about the axle of lower pivot between a plurality of angular positions, typically including a plurality of inclined (vertical) positions partially forward. The seatback can also be bent forward about the upper pivot axis between a proposed position and a forward-facing position, wherein the rear surface of the seatback is positioned substantially horizontally. In the prior art, one or more manually controllable handle release mechanisms are used in order to allow the selection and control of the recline and the forward bend of the vehicle seat back around two substantially parallel pivot shafts. In the U.S. Patent No. 5,052,748 (de Fourrey et al), a unique release mechanism is set forth for this purpose. As conceived therein, when the backrest of the seat is in a reclined backward position, a ratchet mechanism prevents the use of a portion of the pivoting mechanism of the seat backrest, thus preventing the forward doubling of the seatback. on the seat cushion. When the seat backrest is in a proposed vertical position, a single, manually actuated lever arm is raised, in order to fold the backrest of the seat forward onto the seat cushion, thereby immediately and concurrently releasing the backrest of the seat. for its rotation, either forward about both upper and lower pivot shafts, or to recline about the lower pivot axis. Such immediate and concurrent release is highly undesirable, since it avoids the separate control of the reclining function. In the U.S. Patent No. 4,484,779 (Suzuki) shows another such release mechanism, where a conventional release mechanism is used to selectively release a seat backrest for its initial recline or bend forward with. regarding a vehicle seat cushion. After the initial doubles forward of the seat backrest, a separate pin on the seat cushion is engaged by a separate fastener, rotatably mounted on the backrest of the seat. In both prior art patents, there is no direct connection or connection between the seat cushion and the upper pivot axis of the seat back, which is highly undesirable. In addition, it is necessary to carry out an initial folding movement forward of the backrest of the seat, forward of the proposed position in order to allow the backrest of the seat to move towards the fully forward position. It is an object of the present invention to provide a unique mechanism for releasing the control handle for use with a vehicle seat articulation, which release mechanism is operable through manual manipulation of the single control handle. Another object of the present invention is to provide a unique mechanism for releasing the control handle for use with a vehicle seat articulation, which release mechanism is operable through the manual manipulation of a single control handle without requiring a significant Initial fold forward of the seatback, in front of the proposed position. A further object of the present invention is to provide a unique mechanism for releasing the control handle for use with a vehicle seat articulation, which release mechanism is simple and inexpensive to manufacture. Still another object of the present invention is to provide a unique mechanism for releasing the control handle for use with a vehicular seat articulation, whose release mechanism is operated intuitively. SUMMARY OF THE INVENTION According to the present invention, a unique mechanism for releasing the control handle for use with a vehicle seat joint having a mounting plate securely fastened to a vehicle seat cushion means, a plate is exposed. of sector rotatably mounted on the mounting plate for selective rotational movement about a first lower pivot axis, and a rotary control plate rotatably mounted on the sector plate for selective rotational movement about a second axis of pivot upper and securely fastened to a means of backrest vehicle. When the vehicle seat joint is installed in a vehicle seat, the seat backing means. The vehicular seat is rotatably movable with respect to the cushion means of the vehicular seat about the first lower pivot axis between a plurality of angular positions and can be bent forward with respect to the cushion means of the vehicular seat about the second upper pivot axis between a position proposal and a forward position. The unique release mechanism of the control handle comprises a primary holder means, operatively interconnected between the pillar plate and the sector plate so as to be able to move selectively between a hook configuration wherein the pillar plate and the plate sector are fixed in a rotatable manner with respect to each other, and a disengagement configuration wherein the upright plate and the sector plate are free to rotate about the first lower pivot axis such that the backing means of the vehicular seat be rotationally movable, as mentioned above, between the plurality of angular positions. A secondary clamping means is operatively interconnected between the sector plate and the rotary control plate in order to be selectively movable between a latching configuration wherein the sector plate and the rotary control plate if fixed rotatably with respect to one of the other, and a disengagement configuration wherein the sector plate and the rotary control plate are free to bend forward, as mentioned above, between the proposed position and the forward position. A manually grasped handle means is rotatably mounted on the seat cushion means and operatively connected to the primary fastening means, for movement of an initial position, corresponding to the latching configuration of the primary fastening means and the configuration of engaging the secondary holder means, towards a first releasing position, in which first releasing position the manually grasped handle means effects the releasing configuration of the primary holding means, thereby enabling the rotating bending, as mentioned above, of the means of vehicle seat back around the first lower pivot axis between the plurality of angular positions. A connecting arm means is operatively interconnected between the secondary fastening means and the cushion means of the vehicular seat for movement of the secondary fastening means of the engagement configuration to the disengagement configuration after relative movement of the arm means Union and the secondary fastening means with respect to each other beyond a threshold position, thereby releasing the vehicular seat backing means so that it can be bent forwardly over the cushion means of the vehicular seat about the second upper pivot axis , as mentioned earlier. Other advantages, configurations and features of the present invention, as well as the methods of operation and functions of the related structure elements, and the combination of processing parts and economies, will become more apparent upon consideration of the following detailed description and the appended claims in relation to the accompanying drawings, the latter being briefly described below.

BRIEF DESCRIPTION OF "THE DRAWINGS The novel features that are believed are characteristics of the unique release mechanism of the control handle for use with a vehicle seat joint, according to the present invention, according to its structure, organization, use and method of operation , together with the additional objects and advantages thereof, will be better understood from the following drawings, which will now be illustrated, by way of example, a currently preferred embodiment of the invention, however, it is expressly understood that the drawings is for the purpose of illustration and description only and is not intended as a definition of the limits of the invention In the accompanying drawings: Figure 1 is a perspective view of the left front portion of a first embodiment of a single release mechanism of the control handle according to the present invention; Figure 2 is a perspective view from the part and front right of the single release mechanism of the control handle of figure 1; Figure 3 is a left side elevation view of the single mechanism release mechanism of the control handle of Figure 1, installing the single release mechanism of the control handle in a vehicle seat and with the seat backrest of the seat in a proposed vertical position; Figure 4 is a right side elevation view of the single release mechanism of the control handle of Figure 3; Figure 5 is a view similar to Figure 3, but with the seat backrest in a reclined position; Figure 6 is a view similar to Figure 3, but initially the back of the seat is bent forward about the first lower pivot axis, and with the linking arm means and the secondary holding means in a threshold position; Figure 6A is an enlarged view of a portion of Figure 6, showing the secondary fastener means in a hook configuration, - Figure 7 is a view similar to Figure 6, but with the back of the seat folded forward slightly more than in figure 6, around the first lower pivot axis; Figure 7A is an enlarged view of a portion of Figure 7, showing the secondary fastener means in a disengagement configuration; Fig. 8 is a view similar to Fig. 7, but with the back of the seat bent forward, about the first lower pivot axis to a forward, substantially horizontal position; Fig. 8A is an enlarged view of a portion of Fig. 8, showing the secondary fastener means in a latching configuration; Figure 9 is a perspective view of the left front portion of a second embodiment of the single release mechanism of the control handle according to the present invention; Fig. 10 is a perspective view of the front right part of the second embodiment of the single release mechanism of the control handle of Fig. 10; Figure 11 is a left side elevation view of the second embodiment of the single release mechanism of the control handle of Figure 9, installing the single release mechanism of the control handle on a vehicle seat and partially folding forward the backrest of seat of the seat, about the first lower pivot axis, and the connecting arm means and the secondary holding means are shown in a threshold position, Figure HA is an enlarged view of a portion of figure 11, showing the secondary fastener means in a latching configuration; Fig. 12 is a perspective view of the left front portion of a third embodiment of the single release mechanism of the control handle according to the present invention; Fig. 13 is a perspective view; of the front right part of the third embodiment of the single release mechanism of the control handle of figure 12; Fig. 14 is a left side elevation view of the third embodiment of the single release mechanism of the control handle of Fig. 12, installing the single release mechanism of the control handle in a vehicle seat and with the seat backrest of the seat in a vertical proposed position; Figure 15 is a view similar to Figure 14, but with the seat back in a reclined position; Figure 16 is a view similar to Figure 15, but with the back of the seat partially bent forward about the first lower pivot axis, and with the linking arm means and the secondary holding means in a threshold position; and Figure 17 is a view similar to Figure 16, but with the back of the seat bent forward slightly more than in Figure 16, about the first lower pivot axis. DETAILED DESCRIPTION OF A PREFERRED MODE Referring now to Figures 1 to 17 of the drawings, first, second and third embodiments of the single release mechanism of the control handle of the present invention are shown, the modalities of which will each be described separately in this specification. Common reference numbers are used in the figures to denote similar parts of a modality in the text. Referring now to Figures 1 to 8A of the drawings, a first embodiment of the single release mechanism of the control handle of the present invention is shown, as indicated by the general reference number 20. As can be seen in Figures 3, 4, 5, 6, 7 and 8, the sole release mechanism of the control handle 20 is for use with a vehicle seat joint, as indicated by the general reference number 22, installed in a vehicle seat, as indicated by the general reference number 24. The vehicle seat joint 22 has a pillar plate 30 securely fastened to a vehicle seat cushion means 26 (shown in dotted lines) by conventional fastening means (not shown), as shown in FIG. knows well in the subject. A sector plate 40 is rotatably mounted on the mounting plate 30, by means of a pin member 36, for selective rotational movement about a first lower pivot axis "A". A rotary control plate 50 is rotatably mounted on the sector plate 40 by a pin member 42 and held in place by a mounting bracket 44, for selective rotary movement about a second upper pivot shaft "B" limited by a sector groove 52 in the rotary control plate 50 engaged by a limiting pin 46 securely mounted on the sector plate 40. The rotary control plate 50 is securely fastened to a backup means of vehicular seat 28 (shown in dotted lines) by conventional fastening means (not shown), as is well known in the art. When the vehicle seat articulation 22 is installed in the vehicle seat 24, the vehicle seat backing means 28 is rotatably movable with respect to the vehicle seat cushion means 26 around the first lower pivot axis "A" between a plurality of vehicle seats. angular positions, including a forward bending return movement, as indicated by the equal-ended arrow "C" in Figure 3, or a reclining return movement, as indicated by the equal-ended arrow "D" in Figure 3. Such angular positions include a substantially vertical occupable position, as best seen in Figures 3 and 4, various reclined positions, one of whose reclined positions is shown in Figure 5, and also include positions partially inclined forward , as can be better seen in figures 6 and 7. The reclined positions and the positions partially inclined forward are limited mediant e a limiting pin 47 securely mounted on the sector plate 40 so as to engage a sector groove 39 in the mounting plate 30. The vehicle seat support means 28 can also be bent forward with respect to the seat cushion means vehicular 26 around the second upper pivot axis "B" between a proposed position, as can be better seen in Figures 3 and 4, and a forward-facing position, as best seen in Figure 8. The unique release mechanism of the control handle 20 comprises a primary fastener means, as indicated by the number reference 60, operatively interconnected between the mounting plate 30 and the sector plate 40 and driven by manually grasp handle means 80. In the preferred embodiments as illustrated, the primary fastener means 60 comprises an adjustment mechanism known recline having a rotating cam (not shown) by manipulating the handle means 80. The cam effects a radial movement in and out of a plurality of serrated latching pawls (not shown) within the primary fastener means 60 and associated with the seat cushion means 26 in clutch and disengagement with an engaging annular gear ring (not shown) ^ also within the fastening means of the seat cushion. rimario 60 and associated with the seat backing means 28. Examples of modern versions of such primary fastener means 60 can be found in the U.S. Patent. No. 5,526,970 (to Kienke et al) and European Patent No. 808,742 (to Rohee). The primary fastener means 60 is selectively movable between a latching configuration and a latching configuration. In the engagement configuration, the mounting plate 30 and the plate sector 40 are fixed in a rotatable manner with respect to each other, and the rotational movement of the seat backing means 28 about the first lower pivot axis "A" is prevented. ", as mentioned earlier. In the disengagement configuration, the upright plate 30 and the plate sector 40 are free to rotate about the first lower pivot axis "A" in such a way that the vehicle seat backing means 28 is rotatably movable, as mentioned above. , between the plurality of angular positions, as can best be seen in Figures 3, 4, 5, 6 and 7. A secondary fastener means designated by the general reference number 70 is operatively interconnected between the sector plate 40 and the rotary control plate 50 so as to be selectively movable between a latching configuration, as best seen in FIGS. 1 to 6, and a disengagement position, as best seen in FIGS. 7 through 8. When the secondary fastening means 70 is in the engagement configuration, the sector plate 40 and the rotary control plate 50 are fixed in a rotatable manner with respect to each other. When the secondary clamping means 70 is in the disengagement configuration, the sector plate 40 and the rotary control plate 50 are free to bend forwardly around the second upper pivot axis "B", as mentioned above, between the proposed position, as can best be seen in Figures 1 to 6, and the position turned forward, as can be seen in Figure 8. In the first embodiment, the secondary holding means 70 essentially comprises a cam member 72 rotatably mounted on the sector plate 40 by means of a pin member 74, and held in place by the mounting bracket 44, for the rotary movement between a hooking configuration, as best seen in FIGS. 1 to 6, and especially in FIG. 6A, and a disengagement configuration, as best seen in FIGS. 7 and 8, and especially in FIG. 7A. The cam member 72 is deflected by spring to its engagement configuration by a spring member 76 having a first end 76a mounted on a projection 45 formed on the mounting bracket 44 and a second end 76b mounted on a post 78 that it projects outwardly from the cam member 72. The rotational movement of the cam member 72 is limited by a sector groove 53 in the rotary control plate 50 engaged by a limiting pin 79 securely mounted on the cam member 72.

The engagement configuration of the cam member 72 corresponds to the engagement configuration of the secondary fastener means 70 and the release configuration corresponds to the disengagement configuration of the secondary fastener means 70. In the engagement configuration of the cam member 72, a surface Cam-driven 71 on the cam member 72 engages by engaging a cooperating cam receiving surface 54 on the rotary control plate 50. In the disengagement configuration of the cam member 72, the cam-driven surface 71 is removed from being engaged by engagement with the cam receiving surface 54. The secondary fastening means 70 further comprises means for releasably locking the vehicle seat backing means 28 in the forward-facing position shown in Figure 8. In the first embodiment, the means to releasably lock the vehicular seat backing means 28 in the overturned position toward lante, comprises a notch 56 placed on the rotary control plate 50 and a projection tooth member 77 positioned on the cam member 72 for the cooperative inner lock with the notch 56 when the vehicular seat backing means 28 is in place. the position overturned forward. As can best be seen in Figure 8A, the cooperating profiles of the notch 56 and the tooth member 77 are configured in such a way that the displacement of the seatback means 28, with only a slightly greater minimum force in an opposite rotating direction to that of the arrow "K" in Figure 8, causes the unlocking of the notch 56 and the tooth member 77 with respect to each other, thus allowing the seat backrest to rotate about the second upper pivot axis "B" , in the same rotary direction, in order to return from its bent forward position to its proposed position, as can best be seen in figure 6. The manually graspable handle means 80 is mounted on the seat cushion means 26 through of the pin member 36 in order to cause rotation of the pin member 26 upon rotation of the handle means 80. Such rotation of the pin member 36 causes selective engagement and disengagement of the holding means. primary 60, as is generally known in the art.

The manually graspable handle means 80 is mounted for its rotational movement with the pin member, as indicated by the arrows "E", "F", and "G" in Figures 3, 4 and 5, respectively, of a initial position, as shown in solid lines in Figures 3, 4 and 8, and as shown in dotted lines in Figure 5, to a first release position, as shown in solid lines in Figures 5 to 7, and as shown in dotted lines in FIG. 8. The manually graspable handle means 80 is thus used to selectively move the primary fastener means 60 from the engagement configuration to the release configuration, thereby allowing the recline of the backing means to be released. vehicular seat 28, as indicated by the arrow "H" in Figure 5, or to allow the initial forward bend of the vehicular seat backing means 28, as indicated by the arrows "I" and "J" in the Figures 6 and 7, respectively. The manually grasped handle means 80 is preferably biased towards its initial position by means of internal springs (not shown) placed within the primary fastener means 60. A watch spring 37, interconnected between the pin member 47 on the sector plate 40 and the pin member 36, deflects the sector plate 40 by spring and thus both to the seat backing means 28 towards the bent forward position. The manually graspable handle means 80 is operatively connected to the primary fastener means 60 through the pin member 36. If desired, a slave cable (not shown) can be interconnected between the manually graspable handle means 80 and a fastener means. primary (not shown) on a second vehicular seat joint (not shown) associated with the vehicle seat 24 on the opposite side, in order to translate the movement of the handle means 80 to said other primary fastener means (not shown). In the matter it is well known such use of a subordinate cable mechanism to translate the driving movement towards a second vehicle seat articulation means. The first release position of the manually grasping handle means 80 corresponds to the engagement configuration of the primary fastener means 60 and the engagement configuration of the secondary fastener means 70. In the first release position, the handle means is manually graspable. of disengaging the primary fastener means 60, thereby enabling the rotating bending, as mentioned above, of the vehicular seat backing means 28 about the first lower pivot axis "A" between the plurality of angular positions. An elongated joint arm means 90 is operatively interconnected between the secondary fastening means 70 and the vehicle seat cushion means 26. In the first embodiment illustrated, the attachment arm means 90 has a first end 91 connected in a rotatable manner to the vehicle seat cushion means 26 by means of a mounting pin 35 secured to the mounting plate 30, as can be seen in figures 3, 5, 6, 7 and 8, and as best seen in figure 4 The second end 92 of the link arm means 90 further comprises an elongated slot 94 having a contiguous end 94a positioned towards the first end 91 of the link arm means 90 and a distal end 94b positioned towards the second end 92 of the medium of connecting arm 90. As best seen in Figure 4, the second end 92 of the connecting arm means 90 is operatively connected to the secondary holding means 70 by means of the pin member 79 mounted thereon. on the cam member 72, which pin member 79 engages the elongated slot 94 in sliding relation with loss of movement to effect the operative connection between the link arm means 90 and the secondary holding means 70. The elongated slot 94 is placed and dimensioned such that, in the threshold position of the connecting arm means 90 and the secondary securing means 70, as illustrated in FIGS. 6 and 6A, the pin member 79 is positioned at the distal end 94b of the elongate slot 94 in load bearing relationship to "effect the movement of the secondary fastener means 70 toward the release configuration, as shown in FIG. 7. The elongated joint arm means 90 is operatively interconnected between the means secondary fastener 70 and the vehicle seat cushion means 26, as described, for movement of the secondary fastener means 70 from the engagement configuration to the fastener configuration. engaging after the relative movement of the connecting arm means 90 and the pin member 79 of the secondary holding means 70 with respect to one another, beyond the threshold position illustrated in Figure 6. In the first embodiment, the relative movement of the connecting arm means 90 and the secondary holding means 70 with respect to each other, occurs after the forwardly bent rotary movement of the vehicle seat backing means 28 around the first lower pivot axis "A" after the movement of the medium of handle 80 towards the first released position. In this way, the vehicular seat backing means 28 is released so that it can be bent forwardly over the vehicle seat cushion means 26 around the second upper pivot axis "B", as mentioned above, towards a position turned forward, as can best be seen in figure 8. In use, as can best be seen in figure 8, in order to place the vehicle seat backing means 28 in its forward-facing position, the handle means 80 it is rotated from an initial position, as can best be seen in figures 3 and 4, by manual displacement, as indicated by the arrows "E" and "F", towards the first release position, as can best be seen in Figures 6 and 7, to thereby unlatch the primary fastener means 60. The vehicle seat backing means 28 is then initially manually bent forward to the position shown in figure 6, as indicated by the arrow "I". During this initial bend forward of the vehicular seat backing means 28, the pin member 79 engages the elongated slot 94 in sliding relation with loss of movement until it reaches the threshold position, as described above, and as can best be observed in figures 6 and 6A. The vehicle seat backing means 28 is then bent forward further by the user towards the position shown in Figure 7, as indicated by the arrow "J", to effect the operative connection between the link arm means 90. and the secondary fastening means 70, thus disengaging the secondary fastening means 70. The vehicular seat backing means 28 can then be bent further forward, as indicated by the arrow "K" in Figure 8, towards the position overturned towards substantially horizontal front, as defined by the limiting pin 46 engaged in the sector groove 52. The vehicle seat backing means 28 is locked in the substantially horizontal forward position by means of the cooperative inner locking of the tooth member. projection 77 with the notch 56. The handle means 80 is then released and returned to its initial position under the influence of the aforementioned internal spring deflection (not shown) of the primary fastener means 60, as indicated by the arrow, L " in Figure 8. The vehicle seat backing means 28 can be released from the lock in the forward-facing position by mere displacement, by using the seat backing means 28 with only a slightly greater minimum force, as discussed above, due to the cooperating profiles of the notch 56 and the tooth member 77. Referring now to Figures 9, 10 and 11 of the drawings, a second embodiment of the single release mechanism of the control handle of the present invention is shown, as is indicated by the general reference number 20 'The unique release mechanism of the control handle 20' of the second embodiment is structurally and functionally similar to the unique mechanism of release of the control handle 20 of the first preferred embodiment, except for the specific interconnection and operation of the link arm means 90 '. The first end 91 'of the connecting arm means 90' is rotatably connected to the vehicle seat cushion means 26 by means of a mounting pin 35 secured to the mounting plate 30, in front of the first lower pivot axis "A" . The second end 92 'of the link arm means 90' is operatively connected to the pin member 79 mounted on the cam member 72 ', which pin member 79 engages the elongated slot 94' in sliding relation with loss of movement. to effect the operative connection between the connecting arm means 90 'and the secondary holding means 70. The elongated slot 94' is positioned and dimensioned in such a way that, in the threshold position of the connecting arm means 90 'and the secondary fastener means 70, as illustrated in FIGS. 11 and HA, the pin member 79 is positioned at the adjoining end 94a 'of the elongate slot 94 in load bearing relationship to effect movement of the secondary fastener means 70 toward the disengagement configuration after the continuous forward folding of the vehicular seat backing means 28. Referring now to figures 12 to 16 of the drawings, a third modality of the single releasing mechanism is shown. of the control handle of the present invention, as indicated by the general reference number 20 ''. The unique release mechanism of the control handle 20"of the third embodiment is structurally and functionally similar to the single release mechanism of the control handle 20 'of the second preferred embodiment, except for the specific interconnection and operation of the connecting arm means 90". The first end 91"of the connecting arm means 90" is rotatably connected to the vehicle seat cushion means 26 through the manually graspable handle means 80, by means of an upright pin 35 secured to the handle means 80, in such a way that the connecting arm means 90"moves in accordance with the movement of the manually accessible handle means 80. The second end 92" of the connecting arm means 90"is operatively connected to the pin member 79 mounted on the cam member 72 ', which pin member 79 engages the elongated slot 94"in sliding relation with loss of movement to effect the operative connection between the link arm means 90" and the Secondary support bra 70 ''. As in the second embodiment of the single release mechanism of the control handle 20 'of the present invention, the manually graspable handle means 80 is mounted for its rotational movement, as indicated by the arrow "M" and "N" on the Figures 14 and 15, respectively, of an initial position, as shown in solid lines in Figure 14 and as shown in dotted lines in Figure 15, to a first release position, as shown in solid lines in the figure 15 and as shown in dashed lines in Fig. 16. The manually graspable handle means 80 is used (as previously described) to selectively move the primary engagement means 60 from the engagement configuration to the release configuration, thereby enabling the recline of the vehicle seat backing means 28, as indicated by the arrow "H" in Figure 15, to a reclined position as shown, or to allow an initial bend forward of the vehicle. The vehicle seat backing means 28, as indicated by the arrow "P" in Figure 16. As best seen in Figure 16, the manually grasped handle means 80 can be further moved, as indicated by the arrow " Q ", of the first release position, as shown in the dotted profile, through a threshold handle position, as shown in solid lines, wherein the connecting arm means 90" has been carried by the movement of the handle means 80 towards the threshold position of the connecting arm means 90"and the secondary holding means 70". In the threshold position of the connecting arm means 90"and the secondary fastening means 70", the pin member 79 is positioned at the proximal end 94a "of the elongated slot 94" in load bearing relation. to effect the movement of the secondary holding means 70"towards the release configuration. The manually grasped handle means 80 can be moved further, as indicated by the arrow "R" in FIG. 17, to a second release position, as shown in solid lines in FIG. 17, beyond the position of the middle arm linkage 90"and the secondary support means 70", in order to effect the movement of the secondary support means 70"toward the release configuration, as mentioned above. For those skilled in the art of the invention other variations of the foregoing principles will be apparent, and such variations are considered to be within the scope of the present invention. In addition, other modifications and alterations in the design and processing of the apparatus of the present invention may be used without departing from the scope of the accompanying claims.

Claims (23)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and therefore the property described in the following claims is claimed as property. A single mechanism for releasing the control handle for use with a vehicle seat joint having a pillar plate securely attached to a vehicle seat cushion means, a sector plate mounted rotatably on the pillar plate for the selective rotary movement about a first lower pivot axis, and a rotary control plate rotatably mounted on the sector plate for selective rotational movement about a second upper pivot axis and securely fastened to a means of vehicle seat backrest, wherein, when the vehicle seat articulation is installed in a vehicle seat, the vehicle seat backing means is rotatably movable with respect to the vehicle seat cushion means about the first lower pivot axis between a plurality of angular positions and can be bent forward with respect to the medium of vehicle seat cushion around the second upper pivot axis between a proposed position and a forward-facing position, the single release mechanism of the control handle having: a primary fastening means operatively interconnected between the mounting plate and the sector plate in order to be selectively movable between a latching configuration, wherein the upright plate and the sector plate are fixed in a rotatable manner with respect to each other, and a disengagement configuration, wherein the upright plate and the sector plate are free to rotate around the first lower pivot axis such that the vehicle seat backing means is rotatably movable, as mentioned above, between the plurality of angular positions; a secondary fastener means operatively interconnected between the sector plate and the rotary control plate in order to selectively move between a latching configuration wherein the sector plate and the rotary control plate are rotatably fixed with respect to one of the other, and a disengagement configuration wherein the sector plate and the rotary control plate are free to bend forward, as mentioned above, between the proposed position and the position overturned forward; a manually grasped handle means rotatably mounted on the seat cushion means and operably connected to the primary fastener means, for movement of an initial position, corresponding to the engagement configuration of the primary fastener means and the configuration of engaging the secondary fastener means, to a first releasing position, in which first releasing position the manually grasped handle means effects the disengagement configuration of the primary fastener means, thereby enabling the rotating bending, as mentioned above, of the fastener means. vehicle seat back around the first lower pivot axis between the plurality of angular positions, wherein the improvement comprises: an elongated joint arm having a first end rotatably mounted on the vehicle seat cushion means and a second end operatively connected to the secondary support means for the mo movement of the secondary fastener means from the engagement configuration to the release configuration after relative movement of the attachment arm and secondary fastener means relative to one another beyond a threshold position, thereby releasing the seat backing means vehicular so that it can be bent forward over the vehicle seat cushion means about the second upper pivot axis, as mentioned above.
2. 2. The unique release mechanism of the control handle according to claim 1, characterized in that the first end of the connecting arm is rotatably mounted, as mentioned above, on the mounting plate and wherein the relative movement of the connecting arm and the secondary holding means with respect to each other occurs after the rotary movement bent forward of the vehicular seat backing means about the first lower pivot axis after movement of the handle means towards the first release position.
3. The unique release mechanism of the control handle according to claim 2, characterized in that the second end of the connecting arm further comprises an elongated slot having a contiguous end placed towards the first end of the connecting arm and a distant end placed towards the second end of the connecting arm and, wherein the secondary holding means includes a pin member, which pin member engages the elongated slot in sliding relation with loss of movement to effect the operative connection between the connecting arm and the holding means secondary.
4. The single release mechanism of the control handle according to claim 3, characterized in that the elongated slot is positioned and dimensioned in such a way that, in the threshold position of the connecting arm and the secondary holding means, the pin member is placed at the adjacent end of the elongated slot in load bearing relation to effect the movement of the secondary holding means toward the unlatching configuration.
5. The unique release mechanism of the control handle according to claim 4, characterized in that the secondary fastening means essentially comprises a cam member having a cam-driven surface, the cam member being mounted on the sector plate for the rotational movement between a latching configuration corresponding to the latching configuration of the secondary fastening means, wherein the cam-operated surface engages a cam receiving surface on the rotating control plate, and a disengagement configuration corresponding to the latching configuration of the latch. secondary support means, wherein the cam-operated surface is removed from the clutch by engagement with -Xa. cam receiving surface.
6. The unique release mechanism of the control handle according to claim 5, characterized in that the cam member is deflected by spring towards its engagement configuration.
7. The unique release mechanism of the control handle according to claim 6, characterized in that the primary fastening means comprises a known reclining adjustment mechanism.
8. The unique release mechanism of the control handle according to claim 7, characterized in that the secondary fastening means further comprises means for releasably locking the vehicular seat backing means in the forwardly overturned position.
9. 9. The unique mechanism for releasing the control handle according to claim 8, characterized in that the means for releasably locking the vehicular seat backing means in the forwardly turned-over position comprises a notch placed on the rotary control plate and a rotating control member. projection tooth placed on the cam member for cooperative internal locking with the notch when the vehicle seat backrest member is in the forward forward position.
10. The unique release mechanism of the control handle according to claim 3, characterized in that the elongated slot is positioned and dimensioned in such a way that, in the threshold position of the connecting arm and the secondary holding means, the pin member is placed at the distal end of the elongated slot in load bearing relationship to effect movement of the secondary holding means to the unlatching configuration.
11. The unique release mechanism of the control handle according to claim 10, characterized in that the secondary fastening means essentially comprises a cam member having a cam-driven surface, the cam member being mounted on the sector plate for the rotational movement between a latching configuration corresponding to the latching configuration of the secondary fastening means, wherein the cam-operated surface engages a cam receiving surface on the rotating control plate, and a disengagement configuration corresponding to the latching configuration of the latch. secondary fastener means, wherein the cam-operated surface is removed from the clutch by engagement with the cam receiving surface.
12. The single release mechanism of the control handle according to claim 11, characterized in that the cam member is deflected by spring towards its engagement configuration.
13. The unique release mechanism of the control handle according to claim 12, characterized in that the primary fastening means comprises a known reclining adjustment mechanism.
14. The unique release mechanism of the control handle according to claim 13, characterized in that the secondary fastening means also comprises means for releasably locking the vehicular seat backing means in the forward-facing position.
15. 15. The single release mechanism of the control handle according to claim 14, characterized in that the means for releasably locking the vehicle seat backing means in the forward-facing position comprises a notch placed on the rotary control plate and a projection tooth member positioned on the cam member for cooperative internal locking with the notch when the vehicular seat backrest member is in the forward forward position.
16. 16. A single mechanism for releasing the control handle for use with a vehicle seat joint having a mounting plate securely attached to a vehicle seat cushion means, a sector plate rotatably mounted on the mounting plate for the selective rotary movement about a first lower pivot axis, and a rotary control plate rotatably mounted on the sector plate for selective rotational movement about a second upper pivot axis and securely fastened to a means of vehicle seat backrest, wherein, when the vehicle seat articulation is installed in a vehicle seat, the vehicle seat backing means is rotatably movable with respect to the vehicle seat cushion means about the first lower pivot axis between a plurality of angular positions and can be bent forward with respect to the medium of vehicle seat cushion around the second upper pivot axis between a proposed position and a forward tilted position, having the unique release mechanism of the control handle: a primary fastener means operatively interconnected between the riser plate "and the sector plate so as to be selectively movable between a hook configuration, wherein the riser plate and the plate of sector are fixed in a rotatable manner with respect to each other, and a configuration of disengagement, wherein the upright plate and the sector plate are free to rotate about the first lower pivot axis such that the backing means of vehicular seat is rotatably movable, as mentioned above, between the plurality of angular positions; a secondary fastener means operatively interconnected between the sector plate and the rotary control plate so as to be able to move selectively between a latching configuration wherein the sector plate and the rotary control plate are rotatably fixed with respect to a of the other, and a disengagement configuration wherein the sector plate and the rotary control plate are free to bend forward, as mentioned above, between the proposed position and the forward-facing position; a manually grasped handle means rotatably mounted on the seat cushion means and operatively connected to the primary fastener means, for movement of an initial position, corresponding to the latching configuration of the primary fastener means and the latching configuration of the secondary clamping means, to a first releasing position, in which first releasing position the manually grasping handle means effects the disengagement configuration of the primary clamping means, thereby enabling the rotating bending, as mentioned above, of the backing means of vehicular seat around the first lower pivot shaft between the plurality of angular positions, wherein the improvement comprises: an elongated joint arm having a first end rotatably mounted on the manually grasp handle means and a second end connected to operative way to the secondary support means for the movement of the secondary fastener means of the engagement configuration to the release configuration after relative movement of the tie arm and the secondary fastener means with respect to one another beyond a threshold position, thereby releasing the seat backing means vehicular so that it can be bent forward over the vehicle seat cushion means about the second upper pivot axis, as mentioned above, and wherein the manually graspable handle means is movable in addition to the first release position through a threshold handle position wherein the link arm has been carried by the handle means towards the threshold position of the link arm and the secondary holder means, towards a second release position beyond the threshold position of the link arm. union and the secondary fastener means, in order to effect the movement of the secondary fastener means towards the configuration of senganche, as mentioned above.
17. The single release mechanism of the control handle according to claim 16, characterized in that the second end of the connecting arm further comprises an elongated slot having a contiguous end placed towards the first end of the connecting arm and a distant end placed towards the second end of the connecting arm and, wherein the secondary securing means includes a pin member, which pin member engages the slit elongated in sliding relationship with loss of movement to effect the operative connection between the connecting arm and the middle secondary bra.
18. The unique release mechanism of the control handle according to claim 17, characterized in that the elongated slot is positioned and dimensioned in such a way that, in the threshold position of the connecting arm and the secondary holding means, the pin member is placed at the distal end of the elongated slot in load bearing relationship to effect movement of the secondary holding means to the unlatching configuration.
19. The single release mechanism of the control handle according to claim 18, characterized in that the secondary fastening means essentially comprises a cam member having a cam-driven surface, the cam member being mounted on the sector plate for the rotational movement between a hook configuration corresponding to the hook configuration of the secondary clamp media, wherein the cam-operated surface engages a cam-receiving surface on the rotating control plate, and a disengagement configuration corresponding to the release configuration of the secondary fastening means, wherein the cam-operated surface is removed from the clutch by engagement with the cam receiving surface. ~
20. 20. The unique release mechanism of the control handle according to claim 19, characterized in that the cam member is deflected by spring towards its engagement configuration.
21. 21. The unique release mechanism of the control handle according to claim 20, characterized in that the primary fastening means comprises a known reclining adjustment mechanism.
22. 22. The unique release mechanism of the control handle according to claim 21, characterized in that the secondary fastening means further comprises means for releasably locking the vehicular seat backing means in the forward-facing position.
23. 23. The single release mechanism of the control handle according to claim 22, characterized in that the means for releasably locking the vehicular seat backing means in the forward-facing position comprises a notch placed on the rotary control plate and a projection member member positioned on the cam member for cooperative internal locking with the notch when the vehicular seat backrest member is in the forward forward position. SUMMARY A unique release mechanism of the control handle for a vehicle seat joint has a mounting plate unible to a seat cushion, a sector plate installed rotatably on the mounting plate for selective rotary movement around a first axis of lower pivot, and a rotary control plate installed rotatably on the sector plate for selective rotational movement about a second upper pivot axis, and attachable to a seat backrest. The vehicle seat backrest rotates about the first lower pivot axis between a plurality of angular positions and is bent forward about the second upper pivot axis between a proposed position and a forward-facing position. The release mechanism comprises a primary holder that rotatably fixes the sector plate with respect to the mounting plate, and a secondary holder that rotatably fixes the control plate rotatable with respect to the sector plate. A manually graspable handle realizes the configurations of hooking and unhooking of the primary fastener. A linking arm is operatively interconnected between the secondary fastener and the seat cushion for movement of the secondary fastener from a hooked configuration to a disengaged configuration during relative movement of the attachment arm and the secondary fastener with respect to each other further. beyond a threshold position, thereby releasing the backrest of the vehicle seat to fold forward over the vehicle seat cushion about the second upper pivot axis, as mentioned above.