ES2617707T3 - Locking mechanism without slack with the wall for a lift recliner - Google Patents

Abstract

A pair of link mechanisms generally in mirror image (100) adapted to move a seat unit (10) between a reclined, an extended, a closed position, and a seat elevation, the seat unit (10) having a pair of lift assemblies (700) that are adapted to adjust the seat unit (10) in and out of the seat lift position, a seat (15) that is angularly pushed by means of the lift assemblies (700) , and a backrest (25) that is angularly adjustable with respect to the seat (15), each of the linking mechanisms (100) comprising: a seat mounting plate (400) that includes a front portion, a middle portion , and a rear portion, in which the seat (15) is fixedly mounted to the seat mounting plate (400); a seat adjustment assembly (500) that reclines and tilts the backrest (25); a footrest assembly (200) that extends and retracts at least one footrest ottoman (45); a cam control link (540) that includes a front end (541) and a rear end (542), in which the front end (541) of the cam control link (540) is pivotally coupled to the footrest assembly (200); a sequence cam (550) that includes a contact edge (554) and is rotatably coupled to the seat mounting plate (400) by means of a first pivot (551), in which the rear end (542) of the cam control link (540) is pivotally coupled to the sequence cam (550); a linear actuator that provides an automatic adjustment of the seat unit (10) between the closed position, the extended position, the reclined position, and the seat elevation position, in which the linear actuator adjustment is sequenced in a first phase, a second phase, and a third phase that are mutually exclusive, in which the first phase moves the seat adjustment assembly (500) between the reclined position and the extended position, in which the second phase moves the assembly of footrest (200) between the extended position and the closed position, and in which the third phase moves the pair of lifting assemblies (700) in and out of the seat lifting position while maintaining the pair of linkage mechanisms (100 ) in the closed position; and a sequence element (420) extending outwardly from a respective link mechanism (100), in which, during the adjustment of the first phase, the contact edge of the sequence cam (550) is removed from the sequence element (420), thus allowing the seat adjustment assembly (500) to recline the backrest (25), and in which, during the second phase adjustment, the contact edge of the sequence cam (550) is adjacent to the sequence element (420), which physically prevents the seat adjustment assembly (500) from reclining the backrest (25), while the footrest assembly (200) extends the at least one ottoman footrest (45).

Description

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DESCRIPTION

Locking mechanism with no clearance to the wall for a lift recliner Background of the invention

The present invention relates generally to furniture with upholstered movement designed to support a user's body in an essentially seated arrangement. Upholstered furniture includes recliners, recliners, sofas, two-seater sofas, removable seats, cinema seats, traditional chairs and chairs with a removable seat portion, generally referred to as such pieces of furniture in the present specification as "units seat". More particularly, the present invention relates to an improved link mechanism developed to accommodate a wide variety of styles of a seat unit, which is otherwise limited by the configurations of the link mechanisms in the field. In addition, the improved link mechanism of the present invention allows a seat unit to be reclined which is positioned against a wall or placed in a close proximity with other fixed objects.

There are reclining and lifting seat units that allow a user to extend a footrest forward, recline the backrest with respect to a seat, and raise the seat to facilitate easy entry and exit of the seat. These existing seating units typically provide three basic positions (for example, a standard, non-reclining closed position; an extended position, and a reclined position), and also a seat elevation position, (see, for example, the document US 2011/0193373 A1). In the closed position, the seat is located in a generally horizontal orientation and the backrest is arranged substantially in a vertical position. In addition, if the seat unit includes an ottoman attached with a mechanical arrangement, the mechanical arrangement contracts so that the ottoman does not extend. In the extended position, often referred to as the television ("TV") position, the ottoman extends forward of the seat, and the backrest remains sufficiently vertical to allow comfortable viewing of the television by an occupant of the seat unit. In the reclined position the backrest is swung backwards from the extended position in an obtuse relationship with the seat to apoltron or sleep. In the seat lift position, the recline mechanism typically adjusts to the closed position and a lift assembly lifts and tilts the seat unit forward in order to facilitate entry and exit of the seat. same.

Several modern seating units in the industry are adapted to provide the adjustment capacity described above. However, these seating units require relatively complex linking mechanisms to provide this capability. Complex link sets limit certain design aspects when automation is incorporated. In particular, the geometry of these link sets imposes limitations on the incorporation or assembly of a single motor to them. Such restrictions include that the motor, during extension and / or retraction when adjusted between the positions mentioned above, interferes with the transverse beams, the underlying surface, or removable parts attached to the link set. Consequently, two or more motors with substantially large strokes are generally required to achieve the automation of a complete range of motion of a lifting-reclining seat unit. In view of the above, a more refined linkage mechanism that achieves full movement when automatically adjusted between closed, extended, reclined, and even full-height seat positions a gap in the current field of upholstery technology with movement Accordingly, the embodiments of the present invention refer to a new linking mechanism that is constructed in a simple and refined arrangement in order to provide adequate function, while overcoming the undesirable features described above, inherent in conventional complex link mechanisms.

Summary of the invention

The embodiments of the present invention seek to provide a simplified reclining seat link mechanism that can be assembled to a single compact motor and that can be adapted to essentially any style of seat unit. In an exemplary embodiment, the compact motor in conjunction with the link mechanism can achieve full movement and sequential adjustment of the seat unit when automatically adjusted between the closed, extended, reclined, and seat elevation positions. The compact engine can be used in an efficient and cost-effective manner to adjust the link mechanism without creating interference or other disadvantages that appear in conventional designs that are inherent in automating them. The linkage mechanism may be configured with features that assist in the sequence of the adjustment of the seating unit between the positions, maintaining a seat in a substantially consistent location during the adjustment of the seating unit, and solving other disadvantages that appear in conventional designs.

In general, the reclining booster seat unit includes the following components: ottoman or ottomans with footrests; a pair of base plates in substantially separate and parallel relationship; a pair of lifting assemblies and at least one transverse beam that extends between the lifting assemblies; a lift base assembly coupled to the lift assemblies by means of the lift assemblies; a pair of mon- plates

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seat cutting in a substantially separate and parallel relationship; and a pair of generally mirror image link mechanisms that interconnect the base plates to the seat mounting plates. In operation, the link mechanisms are adapted to move between a seat lift position, a closed position, an extended position and a reclined position, while the lift assemblies are adapted to move the link mechanisms in and out of a seat lift position.

According to the invention, each of the link mechanisms includes a cam control link, a sequence cam, and a sequence element. The cam control link includes a front end and a rear end, in which the front end of the cam control link is pivotally coupled with the footrest assembly. The sequence cam includes a contact edge and is rotatably coupled to the seat mounting plate by means of a first pivot, in which the rear end of the cam control link is pivotally coupled to the sequence cam. The sequence element extends outward, in a substantially perpendicular manner, from a respective linkage mechanism. In operation, during the adjustment of the first phase, the contact edge of the sequence cam is removed from the sequence element, thus allowing the seat adjustment assembly to recline the backrest. Alternatively, during the adjustment of the second phase, the contact edge of the sequence cam is adjacent to the sequence element, which physically prevents the seat adjustment assembly from reclining the backrest, while the footrest assembly extends the minus one autumn of footrests. In this way, the interaction of the sequence element with the contact edge (that is, one or more outer walls) of the sequence cam resists the adjustment of the link mechanisms directly between the closed and reclined positions. For example, when moving from the closed position to the extended position, the backrest is prevented from reclining inadvertently. In another example, when moving from the reclined position to the extended position, the footrest assembly is prevented from extending inadvertently.

According to the invention, each of the link mechanisms includes a linear actuator that provides an automated adjustment of the link mechanisms between the closed position, the extended position, the reclined position, and the seat elevation position. In general, the linear actuator adjustment is sequenced in a first phase, a second phase, and a third phase that are mutually exclusive in the race. In one case, the first phase moves the seat adjustment assembly between the reclined position and the extended position, the second phase moves the footrest assembly between the extended position and the closed position, and the third phase moves the pair of sets of lift in and out of the seat lift position, while maintaining the link mechanisms in the closed position.

In an exemplary embodiment, each of the link mechanisms includes a link of the footrest drive and a support of the footrest drive. The footrest drive support is fixedly attached to one of the ends of an activator shaft. The footrest drive link that includes a front end and a rear end, in which the footrest drive support is pivotally coupled to the rear end of the footrest assembly and the front end of the footrest drive link, is pivotally coupled to the set of footrests. Typically, the activator tree extends between, and is coupled to, the linkage mechanisms. In one case, the activator shaft is configured with a pair of ends, in which one of the ends of the activator shaft is rotatably coupled to a respective base plate by means of an activator mounting plate.

In general, the linear actuator includes the following components: a motor mechanism; a track operatively coupled to the motor mechanism; and a motor activation block that travels longitudinally along the track under automated control. Occasionally, the track includes a second displacement section and a third displacement section. In operation, the motor activation block moves along the first section of travel, thereby causing the activator shaft to rotate and, consequently, causing the footrest unit support to rotate with an angular rotation increase. . This angular rotation increase shifts the link of the footrest drive backwards, generating a lateral traction against the footrest assembly that causes the seat adjustment assembly to adjust from the reclined position and the extended position.

During the second phase, the motor activation block travels longitudinally along the second displacement section, thereby causing the activator shaft to rotate again and, consequently, causing the footrest drive support to rotate in a Second angular rotation increase. This second angular increase in rotation moves the link of the footrest drive backwards, generating another lateral traction against the footrest assembly that causes the footrest assembly to adjust from the extended position and the closed position. Typically, the angular increment includes a range of degrees of angular rotation that does not intersect with a range of degrees included within the second angular increment.

Finally, during the third phase, the motor activation block moves longitudinally along the third displacement section, thus creating a lateral thrust in the activator shaft. Because at this point the activator shaft is prevented from rotating further as a result of a stopping condition of the link mechanism in the closed position (for example, the footrest drive support comes into contact with

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an upper surface of the base plate), this longitudinal translation within the third displacement section activates the adjustment of the lift assemblies inside or outside the seat elevation position, while maintaining the mechanisms of link in the closed position. This adjustment in the seat elevation position causes the seat mounting plate to rise and tilt with respect to the elevation base assembly, while at the same time remaining within the footprint of the elevation base assembly on a underlying surface. Thus, the embodiments of the present invention introduce a single linear actuator that is configured to controllably adjust the linkage mechanisms of a seat between the four previous positions in a sequential or continuous manner.

Brief description of the drawings

In the accompanying drawings that form a part of the specification and to be read in connection with it, and in those similar reference numbers are used to indicate similar parts in the various views:

Figure 1 is a schematic side view of a seat unit in a closed position, in accordance with an embodiment of the present invention;

Figure 2 is a view similar to Figure 1, but in an extended position, in accordance with an embodiment of the present invention;

Figure 3 is a view similar to Figure 1, but in a reclined position, in accordance with an embodiment of the present invention;

Figure 4 is a view similar to Figure 1, but in a seat lift position, in accordance with an embodiment of the present invention;

Figure 5 is a perspective view of a link mechanism in the reclined position, illustrating a linear actuator to provide a motorized adjustment of the seat unit, in accordance with an embodiment of the present invention;

Figure 6 is a view similar to Figure 5, but in the seat lift position, in accordance with an embodiment of the present invention;

Figure 7 is a schematic side view of the link mechanism in the closed position from an external viewpoint to the seat unit, in accordance with an embodiment of the present invention;

Figure 8 is a view similar to Figure 7, but in the extended position, in accordance with an embodiment of the present invention;

Figure 9 is a view similar to Figure 7, but in the reclined position, in accordance with an embodiment of the present invention; Y

Figure 10 is a view similar to Figure 7, but in the seat lift position, in accordance with an embodiment of the present invention.

Detailed description of the invention

The subject matter of the embodiments of the present invention is specifically described in the present specification to satisfy the legal requirements. However, the description itself is not intended to limit the scope of this patent. On the contrary, the inventors have contemplated that the claimed object can also be performed in other ways, to include different steps or combinations of steps similar to those described herein, in conjunction with other present or future technologies .

In general, the embodiments of this invention introduce technology in the furniture industry with movement to improve the operation and style of a reclining-lift type seat unit. In embodiments, operational improvements include: the configuration of the linkage mechanisms of the seat unit to maintain a seat and the backrest directly on the lift assembly throughout the adjustment; the design of the linkage mechanisms for connecting to a lift base assembly by means of a fixing point per side; and the use of a straight tube to serve as a major part of the base plate, thus reducing weight and material to a minimum. In embodiments, style improvements include: joining the lift links of the lift assembly directly to the link mechanisms, respectively, in order to increase the stability of the seat unit; and reorganize the fixation points that interconnect the links that comprise the link mechanisms, thus allowing design features such as seats with T-shaped cushions. These improvements that have been mentioned above, as well as several others, will be made evident through the description that follows and the accompanying drawings.

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Figures 1 to 4 illustrate a seat unit 10. The seat unit 10 has a seat 15, a backrest 25, legs 26 (for example, support bushes on the floor or a lift base assembly 600 resting on on an underlying surface), at least one linkage mechanism 100, at least one lift assembly 700, an engine assembly 300, at least one footrest ottoman 45, a stationary base 35 or chassis, and a pair of opposite arms 55 The stationary base 35 has a front section 52, a rear section 54, and is supported by the legs 26 or the elevation base assembly 600 (see Figure 5), which vertically suspends the stationary base 35 by above the underlying surface (not shown). In addition, the stationary base 35 is interconnected with the seat 15 by means of the link mechanism (s) 100 which are generally arranged between the pair of opposite arms 55 and the back section 54. The seat 15 generally remains fixed in the location on the stationary base 35 during the adjustment of the seat unit 10, or when the seat unit 10 is raised or lowered in or out of a seat elevation position (see Figure 6). In embodiments, the seat 15 and / or the backrest 25 is removable in accordance with the arrangement of the link mechanism 100 in such a way as to avoid interference between the seat 15 / backrest 25 and the opposite arms 55 during adjustment.

Opposite arms 55 are laterally spaced apart and have an arm support surface 57 that is typically substantially horizontal. In one embodiment, the pair of opposing arms 55 are attached to the stationary base 35 by means of intervening members. The backrest 25 extends from the rear section 54 of the stationary base 35 and is rotatably coupled to the link mechanism or mechanisms 100, typically close to the arm support surface 57. The footrest ottoman 45 is removably supported by the link mechanism (s) 100. The link mechanism (s) 100 are arranged to operate in an articulated manner and control the movement of the seat 15, the backrest 25, and the ottoman (s) 45 between the positions shown in Figures 1 to 3, as described in more detail below. Also, when the link mechanism 100 is adjusted to the closed position (see Figure 3), the lift assembly 700 is configured to adjust the seat unit 10 in and out of the seat lift position (see Figure 4 ).

As shown in Figures 1 to 4, the seat unit 10 is adjustable in four positions: a closed position 20, an extended position 30 (ie, the TV position), the reclined position 40, and the lifting position of seat 50. Figure 1 depicts the seat unit 10 adjusted in the closed position 20, which is a normal non-reclined sitting position with the seat 15 in a generally horizontal position and the backrest 25 generally vertical and generally perpendicular to the seat 15. In one embodiment, the seat 15 is arranged in a slightly inclined orientation with respect to the stationary base 35. In this embodiment, the inclined orientation can be maintained throughout the adjustment of the seat unit 10 due to the new configuration of the o of the link mechanisms 100. In addition, when adjusted to the closed position 20, the footrest ottoman 45 is located below the seat 15.

Returning to Figure 2, the extended position 30, or TV position, will be described below. When the seat unit 10 is set to the extended position 30, the footrest ottoman 45 extends forward of the front section 52 of the stationary base 35 and is arranged in a generally horizontal orientation. However, the backrest 25 remains substantially perpendicular to the seat 15 and will not invade an adjacent wall. In addition, the seat 15 is maintained in the inclined orientation with respect to the stationary base 35. In general, the seat 15 does not move forward, backward, downward, or upward relative to the stationary base 35. therefore, the configuration of the seat unit 10 in the extended position 30 provides an occupant with an inclined TV position while providing a space-saving utility. This lack of independent movement of the seat 15 with respect to the opposite arms 55 allows a variety of styles to be incorporated in the seat 15, such as a T-shaped cushion style.

Figure 3 represents the reclined position 40 in which the seat unit 10 is fully reclined. Typically, the backrest 25 is rotated backwards by the link mechanism 100 and pushed with an angle of inclination backwards. The angle of inclination towards the back is typically an obtuse angle in relation to the seat 15. However, the angle of inclination towards the back of the backrest 25 is displaced with a forward and upward translation between light and negligible, of the seat 15 controlled by the link mechanism 100. This is in contrast to other reclining chairs with 3 or 4 position mechanisms, which cause its backrest to move backwards during adjustment, thereby requiring that the reclining chair be positioned at a considerable distance from an adjacent rear wall or other nearby fixed objects. Therefore, the general lack of translation of the seat 15 in the embodiments of the present invention allows a zero clearance with the wall. In general, the expression "zero clearance with the wall" is used herein to refer to a space-saving utility that allows the positioning of the seat unit 10 in close proximity to an adjacent rear wall and other fixed objects located behind the seat unit. In embodiments of the reclined position 40, the footrest ottoman 45 may move slightly upward, but not move forward or backward, from its positions in the extended position 30.

Returning to Fig. 4, the seat lift position 50 will now be described. When the seat unit 10 is set to the seat lift position 50, the link mechanism (s) 100 are maintained in the closed position 20 of Figure 1, but raised upwards and inclined forward to assist in and out of an occupant of the seat unit 10. In an exemplary embodiment, the lift assemblies 700

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they are used to lift and tilt the link mechanism (s) 100, as well as the components of the seat unit attached thereto, with respect to the lift base assembly 600. In one case, the adjustment of the lift assembly 700 is it can be automated by using a linear actuator within the motor assembly 300. Typically, the linear actuator is also used to adjust the link mechanism 100 between the closed, extended and reclined positions.

In embodiments, lift links 720 and 730 of lift assembly 700 are pivotally coupled to a lifting connection plate 710 at connection points 741 and 742, respectively. The pivotal coupling of the lifting links 720 and 730 at the connection points 741 and 742 can be done by means of rivets, which greatly reduce the cost of the material, the assembly time, and allow a separation much higher of the elevation links on the left side and the right side. This increased separation between the lift links 720 and 730 and the opposite lift links (not shown) substantially increases the stability of the seat unit 10.

In addition, the links 710, 720, and 730 of the lift assembly 700 may initially be incorporated into the link mechanism 100, while the lift base assembly 600 is initially assembled separately. In embodiments, the link mechanism 100 is mounted on the lift base assembly 600 at the connection point 743, which fixedly connects the lift connection plate 710 of the lift assembly to a lift support 740 that is typically welded to the lifting base assembly 600. In this way, the connection point 743 allows the link mechanism 100 to be attached to the lifting base assembly 600 with only one fixing element (for example, the bolt with shoulder). Therefore, the process of joining the link mechanism 100 to the lifting base assembly 600 is simplified and can be easily carried out before shipping from the manufacturing plant or after shipping in the facilities of a seat unit manufacturer . With the union of the link mechanism 100 to the lifting base assembly 600 after shipping, transport costs are reduced since the components can be individually packaged in order to minimize the cargo space they use.

As can be seen, the lack of translation of the seat 15 during the adjustment between the closed position 20, the extended position 30, the reclined position 40, and the seat elevation position 50, allows the seat 15 to be substantially maintained instead directly on the elevation base assembly 600. This lack of translation is caused by the geometry of the link mechanism 100. This geometry accommodates an innovative single motor design (see Figures 5 and 6) that allows the unit of seat 10 remain positioned directly on a penimeter of the elevation base assembly 600 (for example, floating on a profile established by the adjacent structural elements that form the base of the seat unit) at each adjustment of the seat unit 10. Specifically, as will be demonstrated later by means of Figures 7 to 10, the link mechanism 100 prevents the seat 15 from moving backwards when the footrest assembly 200 extends nde. On the contrary, with the adjustment from the closed position 20 to the extended position 30, the seat 15 generally moves up and slightly forward and, therefore, acts to recline the seat unit 10. In this way, the elevation of seat 15 helps to balance the reclining movement of the weight of an occupant of a seat unit.

On the other hand, this consistent lateral positioning (that is, an insignificant forward or backward movement of the seat) provides furniture manufacturers with the ability to offer a complete envelope of both the link mechanism 100 and the lifting base assembly 600 , thereby providing complete protection of the link links when the seat unit 10 adjusts to the seat elevation position 50. In contrast, conventional single motor designs move the seat forward or backward during the adjustment such that the seat 15 moves out of a penimeter of the elevation base assembly 600. In particular examples, these conventional designs move their seat back when they are reclining (e.g., push-style chairs on the arm) or move your seat forward (for example, traditional style chairs that avoid the wall).

Returning to Figures 5 to 10, the exemplary configurations of a link mechanism 100 for a seat unit of the reclining type 10 (in the present specification and in what follows "seat unit") which is actuated by an actuator Linear included within the engine assembly, will be illustrated and explained below. With initial reference to Figure 5, a perspective view of the link mechanism 100 in the reclined position is shown, in accordance with an embodiment of the present invention. In embodiments, the link mechanism 100 includes a set of footrests 200, a seat mounting plate 400, a base plate 410, a seat adjustment assembly 500, the elevation base assembly 600, and the elevation assembly 700. The footrest assembly 200 is composed of a plurality of links arranged to extend and contract the ottoman (or, for example, the footrest ottoman 45 of Figures 1 to 4) during the adjustment of the seat unit between the position extended and closed position, respectively. The seat mounting plate 400 is configured to be fixedly mounted to the seat of the seat unit and, in conjunction with an opposite seat mounting plate, defines a seat support surface (not shown). In general, the seat adjustment assembly 500 is adapted to recline and tilt the back of the seat unit, which is coupled to a rear mounting link 510 of the seat adjustment assembly 500. In addition, the seat adjustment assembly 500 includes links (for example,

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activator mounting plate 360) which, indirectly, couple the linear motor actuator unique to the base plate 410 which thus facilitates the lifting movement of the seat after the actuation of the linear actuator.

In addition, the link mechanism 100 comprises a plurality of links that are arranged to drive and control the movement of the seat unit during adjustment between the closed, extended, and reclined positions. These links can be pivotally interconnected. It is understood and appreciated that pivotal couplings (illustrated as pivot points in the figures) between these links can adopt a variety of configurations, such as pivot pins, bearings, traditional assembly accessories, rivets, and combinations. Bolt and nut connections, or any other suitable fasteners that are well known in the furniture manufacturing industry.

In a particular example, the link joints (for example, rotary and pivot couplings) are incorporated into the link mechanism 100 (for example, rivets), with the possible exception of the rotation interface between the activator shaft 350 and the plate of mounting the activator 360. This feature of providing the link joints within the link mechanism 100 minimizes the repair costs associated with wear, since the more expensive welded assemblies (for example, the lift base assembly 600) do not They will be exposed to wear. Although the rotation interface between the activator shaft 350 and the activator mounting plate 360 (including welded joints) is subject to wear, the activator shaft assembly 350, the activator mounting plate 360, and other fixedly connected components they are easily replaced without the need to disassemble any other portions of the linkage mechanism 100 or of the lifting base assembly 600. In general, in the connections that do not move (for example, connection point 743 of Figure 4), Most of the other fasteners are standard bolts.

In addition, the shapes of the links and supports may vary according to what is desired, as well as the location of certain pivot points. It will be understood that when a link is referred to as "pivotally" coupled to, "interconnected" with, "joined" in, etc., another element (eg, link, support, frame, and the like), It is contemplated that the link and the elements may be in direct contact with each other, or other elements (such as the intervening elements) may also be present.

Generally, the link mechanism 100 grinds the rotation movement of the backrest, the minimum translation (if any) of the seat, and the extension of the ottoman (s). In an exemplary configuration, these movements are controlled by a pair of essentially mirror image link mechanisms (one of which is shown herein and indicated by reference number 100), which comprise an arrangement of interconnected links pivotally The linking mechanisms are typically arranged in a relationship with opposite orientation with respect to a longitudinally extending plane that divides the seat unit between the pair of opposite arms. In this way, the following explanation will focus on only one of the link mechanisms 100, and this content is applied equally to the other complementary link set.

With continued reference to Figure 5, the elevation base assembly 600 will be explained below. Typically, the elevation base assembly 600 serves as a base that rests on a surface underlying the seat unit. The lifting base assembly 600 includes a front side member 610, a rear side member 620, a right longitudinal member 630, and a left longitudinal member (not shown). These members 610, 620, 630 can be formed by square metal tubes, or any other material used in the furniture manufacturing industry that has nigged properties. The front side member 610 and the rear side member 620 serve as transverse beams that extend between the right longitudinal member 630 and the left longitudinal member and couple them to each other. Generally, the rear side member 620 is oriented in substantially separate and parallel relationship with the front side member 610. Also, the right longitudinal member 630 is oriented in substantially separate relationship and parallel with the left longitudinal member, in which the left longitudinal members and right 630 extend between and couple the front and rear side members 610 and 620. In addition, the front side member 610 and the rear side member 620 are fixedly connected (eg, welded or fixed at connection points 744 and 745) to a pair of lifting supports 740 (see Figure 10), respectively, within the lifting assemblies 700. In this way, the lifting base assembly 600 extends between the lifting assemblies 700 and fixedly joins them so parallel separated.

When constructed in the elevation base assembly 600, members 610 and 620 reside in a substantially perpendicular relationship with the right longitudinal member 630 and the opposite left longitudinal member. In its role as a base, the lift base assembly 600 acts as a platform whereby the lift assembly 700 can raise and tilt the seat unit with respect to the underlying surface. In addition, as explained in more detail below, the linear actuator of the engine assembly 300 controls the movement of the lift assembly 700 and is pivotally coupled to the rear side member 620 of the lift base assembly 600. Moreover, the longitudinal members left and right 630 and the front and rear side members 610 and 620 represent a penimeter or profile of a footprint of the elevation base assembly 600. During the adjustment of the link mechanism 100, the seat is constantly held directly on the footprint of the con -

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together with lifting base 600, thereby achieving those benefits (for example, allowing a complete fabric cover of the lifting assembly 700 and improving the balance of the weight of an occupant of the seat unit) which have been explained more fully more above. In other words, the linear actuator that provides automatic adjustment of the seat unit between the closed position, the extended position, the reclined position and the seat elevation position is configured to move the lift assembly 700 in and out of the seat elevation position, while maintaining the link mechanisms 100 in the closed position and while consistently maintaining the seat mounting plates 400 within a footprint of the elevation base assembly 600.

Referring to Figures 5 and 10, an automated version of the seat unit using a linear actuator with a single motor is illustrated and will be explained below by means of the following embodiments. In an exemplary embodiment, the link mechanism 100 and the lift base assembly 600 (which has been explained immediately above) are coupled to the linear actuator of the motor assembly 300, which provides the assisted adjustment of the link mechanism 100 between reclined, extended and closed positions. In addition, the linear actuator is used to provide assisted adjustment of the lift assemblies 700 in and out of the seat lift position, while maintaining the link mechanism in the closed position. The engine assembly 300 includes a rear engine support 315, a motor mechanism 320, a front engine support 325, a track 330, an engine activation block 340, an activator shaft 350, and an activator mounting plate 360 Typically, the motor mechanism 320 and the motor activation block 340 are slidably connected to one another by means of the track 330, while the motor mechanism 320 and the motor activation block 340 are held in position and are pivotally coupled to the rear side member 620 of the lift base assembly 600 and the base plate 410 of the link mechanism 100, respectively. For example, as illustrated in Figure 5, the engine activation block 340 may be pivotally coupled to a section between a pair of ends of the rear side member 620 by means of the rear engine support 315.

This "linear actuator" is composed of the motor mechanism 320, the track 330, and the motor activation block 340 and is coupled between the link mechanism 100 and the lifting base assembly 600. The motor mechanism 320 is protected by a housing that is pivotally coupled to the rear side member 620 of the lift base assembly 600 by means of the rear motor support 315. The motor activation block 340 is pivotally coupled to the support of the front motor 325 by means of rotation components ( for example, cushions). The front motor support 325 is fixedly connected to a middle section of the activator shaft 350. The activator shaft 350 extends between and engages the link mechanism 100 and the counterpart mechanism in opposite mirror image (not shown). ). In addition, the activator shaft 350 includes a pair of ends, in which each of the ends of the activator shaft 350 is rotatably coupled to a respective base plate by means of a rotary interface on an activator mounting plate. For example, one of the ends of the activator shaft 350 can be rotatably coupled to the base plate 410 by means of a rotary interface on the activator mounting plate 360, in which the rotary interface can comprise at least one of the bearings, interlocking bushings, or any other device known in the furniture manufacturing industry that allows one component to pivot with respect to another component.

As explained above, the activator shaft 350 extends between and coupled together the link mechanism 100 shown in Figure 5 and its counterpart mirror image link mechanism (not shown). In embodiments, the activator shaft 350 functions as a transverse beam that can be made of metal material (for example, formed metal sheet). Similarly, a seat mounting plate 400, a base plate 410, and a plurality of other links that make up the link mechanism 100 may be formed of metallic material, such as formed stamped steel. However, it should be understood and appreciated that any suitable nested or resistant material known in the furniture manufacturing industry can be used in place of the materials described above.

Continuing with this reasoning, in an exemplary embodiment, the base plates 410 may be made of a straight tube with plate type supports (front base plate 415 and rear base plate 416) fixedly joined (eg welded or fixed ) at each end. As illustrated in Figures 5 and 6, the front base plate 415 is fixedly attached to a front portion 411 of the base plate 410 while the rear base plate 416 is fixedly attached to a rear portion 412 of the base plate 410. In particular cases, the straight tube is constructed with a generally rectangular or square cross section. The use of a straight tube design for most of the base plate 410, unlike a flat plate configuration, helps minimize the material and weight of the base plate 410 while, at the same time, increasing torsional strength along the length of the base plate 410. In addition, the straight tube design provides a simple and strong fixing means (for example, flat welding surface or parallel walls to receive fasteners) to receive the activator mounting plate 360 and to engage the rear transverse tube 690, which extends between the pair of substantially separated and parallel base plates and is coupled thereto. In one example, self-drilling screws may be installed in the straight tube in a substantially vertical direction to join the activator mounting plate 360 and the rear transverse tube 690 to the base plate 410, thereby improving assembly ease, improving consistency in set positions when

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the components of the link mechanism 100 are coupled, and imposing a minimum shear stress on the self-drilling screws.

In operation, the motor activation block 340 travels to or from the motor mechanism 320 along the track 330 during the automated adjustment of the linear actuator. In a particular embodiment, the motor mechanism 320 causes the motor activation block 340 to move longitudinally or slide along the track 330 under automated control. This sliding action produces a rotational and / or lateral force in the front engine support 325, which, in turn, generates the movement of the link mechanism 100 by means of the activator shaft 350. As will be more fully exposed. later, the sliding action is sequenced in a first phase, a second phase and a third phase. In an exemplary embodiment, the first phase, the second phase and the third phase are mutually exclusive in the race. In other words, the linear actuator stroke in the first phase is completely completed before the linear actuator stroke in the second phase begins, and vice versa. Similarly, the linear actuator stroke in the second phase is fully completed before the linear actuator stroke in the third phase begins, and vice versa.

Initially, the track 330 is operatively coupled to the motor mechanism 320 and includes a first displacement section 331, a second displacement section 332, and a third displacement section 333. The motor activation block 340 moves longitudinally along the track 330 under automatic control of the motor mechanism 320 such that the motor activation block 340 is moved into the first travel section 331 during the first phase, the second travel section 332 during the second phase, and the third displacement section 333 during the third phase. As illustrated in Figure 5, the broken lines separating the first displacement section 331, the second displacement section 332, and the third displacement section 333 indicate that displacement sections 331, 332, and 333 are supported, but however they do not overlap. It should be taken into account that the precise lengths of the displacement sections 331, 332, and 333 are provided for demonstration purposes only, and that the length of the displacement sections 331, 332, and 333, or the relationship of the stroke of the Linear actuator assigned to each of the first phase, second phase and third phase, may differ from the length or ratio represented.

Generally, the first phase involves the longitudinal translation of the motor activation block 340 along the first displacement section 331 of the track 330, which generates a first rotation movement (over a first angular interval) of the activator shaft 350 with respect to the mounting plate of the activator 360. The rotational interface of the mounting plate of the activator 360 converts the rotation movement to a lateral thrust that produces the movement of the first phase. This movement of the first phase controls the adjustment of the seat adjustment assembly 500 between the reclined position (see figure 9) and the extended position (see figure 8). Also, during the first phase, the motor activation block 340 moves forward and upward with respect to the elevation base assembly 600, while the motor mechanism 372 generally remains fixed in the space.

Once the first phase race is substantially completed, the second phase can occur. In general, the second phase consists in the continuous longitudinal translation of the motor activating block 340, but along the second displacement section 332 of the track 330. This translation within the second displacement section 332 generates a second movement of rotation (over a second angular interval adjacent to the first angular interval) of the activator shaft 350 with respect to the mounting plate of the activator 360 on the front support of the motor 325, thereby activating the movement of the second phase of the link mechanism 100 The movement of the second phase controls the adjustment (extends or retracts) of the footrest assembly 200 between the extended position (see Figure 8) and the closed position (see Figure 7). Typically, during the stroke of the linear actuator within the second phase, the motor activation block 340 moves back and forth again with respect to the elevation base assembly 600 while the motor mechanism 320 generally remains fixed in the space

In an exemplary embodiment, the first phase of movement includes the first range of degrees of angular rotation of the activator shaft 350 that does not intersect the second range of degrees included within the second phase of movement. In addition, the first and second phases can be sequenced in specific movements of the link mechanism 100. In embodiments, the weight of an occupant sitting in the seat unit and / or the springs interconnecting the links of the seat adjustment assembly 500 They can help create the sequence. Consequently, the sequence ensures that the adjustment of the footrest assembly 200 between the closed and extended positions is not interrupted by a backrest adjustment (attached to the rear mounting link 510), and vice versa. In other embodiments, as shown in Figures 7 to 9, a sequencing assembly integrated within the link mechanism 100 is provided to control the sequence adjustment of the seat unit, thereby segregating the link joints assigned to the first movement phase of the link joints assigned to the second movement phase.

Once the second phase race is substantially completed, the third phase occurs. During the third phase, the motor activation block 340 moves longitudinally forward and upward along the third displacement section 333 of the track 330 with respect to the motor mechanism 320, while

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that the motor mechanism 320 generally remains fixed in space. This longitudinal translation of the motor activation block 340 along the third displacement section 333 creates a lateral thrust in the support of the footrest drive 580, but does not rotate the support of the footrest drive 580 because one or more links of the link mechanism 100 have found one or more stop elements attached thereto (for example, the support of the footrest unit 580 has come into contact with an upper surface of the base plate 410), ensuring this way the link mechanism 100 in an interlocking condition.

In an example of encountering a stopper element, the angular rotation of the second interval (during the movement of the second phase) is completed at a leading rear edge of a support of the footrest actuator 580 in contact with an upper surface of the straight tube comprising the base plate 410. At this point, the additional rotation of the activator shaft 350 is limited by the blocked rotation of the footrest drive support 580.

Consequently, the longitudinal translation along the third displacement section 333 of the track 330 generates a lateral thrust forward and upward in the activator shaft 350, which activates the adjustment of the lifting assemblies 700 inside or outside of the seat lift position (see figure 12) while maintaining the pair of link mechanisms 100 in the closed position. That is, the third phase stroke lifts and tilts forward the link mechanism 100, in relation to the lift base assembly 600, thereby adjusting the lift assembly 700 between a folded configuration and an expanded position of the seat lift position which facilitates entry and exit to the seat unit. As mentioned above, the elevation and the forward inclination of the link mechanism 100 during the movement of the third phase does not move the seat forward or backward with respect to the elevation base assembly 600, keeping it way the seat directly on a penimeter or profile formed by members 610, 620, and 630 of the elevation base assembly 600 on the underlying surface.

In one case, the combination of the motor mechanism 320, the track 330 and the motor activation block 340 is performed as an electrically operated linear actuator. In this case, the electric linear actuator is controlled by a manually operated controller that provides instructions to the linear actuator. These instructions can be provided by detecting a user-initiated action of the manually operated controller. In addition, these instructions can cause the linear actuator to perform a first phase and / or a complete second phase of motion. Or the instructions may cause the linear actuator to partially complete the first phase or the second phase of movement. In this way, the linear actuator can be able to be moved to and maintained in various positions within a first phase or second phase stroke, in an independent manner.

Although a particular configuration of the combination of the motor mechanism 320, the track 330, and the motor activation block 340 has been described, it should be understood and appreciated that other types of suitable devices that provide a sequential adjustment can be used, and that The embodiments of the present invention are not limited to a linear actuator as described herein. For example, the combination of the motor mechanism 320, the track 330, and the motor activation block 340 can be performed as a telescopic apparatus that extends and retracts sequentially.

Advantageously, the single motor lifting mechanism (that is, the innovative interaction of the single linear actuator with the motor assembly 300 and the link mechanism 100) in embodiments of the present invention allows a manufacturer of seating units to employ various features. of style for the link mechanism 100 (for example, T-shaped cushion style seat) that are not possible in an "arm push" style mechanism used by conventional reclining recliners. In addition, the single motor lifting mechanism provides the benefits of reduced clearance with the wall. However, as will be explained below, the total cost of manufacturing the links, the set of the links, and the shipping of the single engine lifting mechanism assemblies is competitive or below that of the lift-recliners conventional.

Returning to Figures 7 to 10, the components of the link mechanism 100 will be explained in detail below. As explained above, the link mechanism 100, which is raised and lowered by the lifting assembly 700 (which will be explained later), includes the footrest assembly 200, the seat mounting plate 400, the mounting plate base 410, and the seat adjustment assembly 500. The footrest assembly 200 includes a front ottoman link 110, a rear ottoman link 120, a lower ottoman link 130, an upper ottoman link 140, and a support of the footrests 170. The front ottoman link 110 is rotatably coupled in a front portion 401 of the seat mounting plate 400 in the pivot 115. The front ottoman link 110 is also pivotally coupled to the upper ottoman link 140 in the pivot 113 and the lower ottoman link 130 on the pivot 117. In addition, the front ottoman link 110 may include a front stopper element (not shown) fixedly attached to a middle section thereof that functions to resist the continued extension of the footrest assembly 200 when the front stop member comes into contact with one side of the upper ottoman link 140.

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Referring to Figure 5, the front ottoman link 110 is also pivotally coupled to a front end 591 of a link of the footrest drive 590 of the seat adjustment assembly 500 in the pivot 593. The link of the footrest drive 590 includes the front end 591 and a rear end 592. The rear end 592 of the footrest drive link 590 is pivotally coupled to a footrest drive support 580 on pivot 594. The footrest drive support 580 is fixedly attached to one of the ends of the activator shaft 350.

In operation, during adjustment of the seat unit between the closed position and the extended position, the linear actuator causes the activator shaft 350 to rotate with the translation of the motor activation block 340 over the second displacement section 332 of the track 330. The rotation of the activator shaft 350 rotates the support of the footrest drive 580 forward (for example, counterclockwise with respect to Figure 5). This rotation of the footrest drive support 580 generates a lateral thrust forward of the footrest drive link 590, by means of the interaction in the pivot 594, which acts on the pivot 573 of the front ottoman link 110. The lateral thrust towards forward acting on the pivot 573 pushes out the front ottoman link 110 causing the front ottoman link 110 to rotate on the pivot 115 in a direction away from the seat mounting plate 400 (for example, clockwise with respect to to Figure 5) and, consequently, extends the footrest assembly 200.

Returning to the footrest assembly 200, in embodiments, the rear ottoman link 120 is rotatably coupled to the front portion 401 of the seat mounting plate 400 on the pivot 121 and is pivotally coupled to the upper ottoman link 140 in the pivot 133. In embodiments, the pivot 121 of the rear ottoman link 120 is slightly behind the pivot 115 of the front ottoman link 110. In addition, as shown in Figure 9, the rear ottoman link 120 is pivotally coupled to a front end 541 of a cam control link 540 of the seat adjustment assembly 500 in the pivot 275. The interaction between the cam control link 540 and a sequence cam 550 allows mutually exclusive sequencing between the first phase and The second phase For example, during the adjustment in the second phase (that is, the adjustment between the closed and extended positions), a rotation moment transferred by the linear drive device to the support of the footrest drive 580 by means of the activator shaft 350, makes that the link of the footrest drive 590 exerts a directional force on the front ottoman link 110 which either extends the footrest assembly 200 to the extended position or contracts the footrest assembly 200 to the closed position. During the second phase of the movement, as illustrated in Figures 7 and 8, the extension of the footrest assembly 200 pulls forward and upwardly to the cam control link 540 by means of the pivot 275. This traction action towards Forward and upward creates a directional force on a second pivot 552, which pivotally couples a rear end 542 of cam control link 540 to sequence cam 550. This directional force causes sequence cam 550 to rotate (e.g., clockwise with respect to figures 7 and 8) around a first pivot 551, which rotatably engages the sequence cam 550 to a middle section of the seat mounting plate 400. This rotation around the first pivot 551 pushes the cam of sequence 550 upwards (see Figure 8), so that a contact edge 554 of a front portion 553 of the sequence cam 550 is not in contact and / or physical proximity with a sequence element 420, or push the sequence cam 550 down (see Figure 7), so that the contact edge 554 is in contact and / or physical proximity with the sequence element 420 extending from a connection link 450.

Also, with reference to the footrest assembly 200 in Figure 9, the upper ottoman link 140 is rotatably coupled at one end to the rear ottoman link 120 in pivot 133 and the front ottoman link 110 in pivot 113. In a opposite end, the upper ottoman link 140 is pivotally coupled to the footrest support 170 in the pivot 172. The lower ottoman link 130 is further pivotally coupled to the front ottoman link 110 in the pivot 117 and to the footrest support 170 in the pivot 175. In embodiments, the footrest support 170 is designed to be inserted into the ottoman (s), such as the footrest ottoman 45, respectively. In a specific case as shown in Figure 2, the support of the footrest 170 supports the ottoman (s) in a substantially horizontal arrangement when the footrest assembly 200 is fully extended with the completion of the second phase of movement.

A spring loaded ottoman support 180 can be provided as an option on some models of the seat unit. As illustrated in Figure 10, the footrest support 170 is replaced by the spring loaded ottoman support 180 which includes a safety footrest support 150, a safety footrest mounting link 160, and a pivot link of the safety footrests 190, and a tension element 195 (for example, an elastic link). The safety footrest mounting link 160 includes one end that is close to the footrest assembly 200 and another end that is distal and extends outwardly from the footrest assembly 200. The proximal end of the safety footrest mounting link 160 is pivotally coupled to an upper end of the upper ottoman link 140 in pivot 172 and is pivotally coupled to an upper end of the lower ottoman link 140 in pivot 175, in which the pivot 172 is located inward in the link of mounting safety footrests 160 with respect to pivot 175. The distal end of the safety footrest mounting link 160 is pivotally coupled to a lower end of the pivot link of safety footrest 190 on pivot 123.

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In embodiments, as illustrated in Figure 8, a portion of the pivot link of the safety footrest 190 extends down beyond the pivot 123 and includes a mounting location (eg, opening 118) to secure a first end of the tension element 195, while the rest of the pivot link of the safety footrest 190 extends upwardly above the pivot 123. An upper end of the pivot link of the safety footrest 190 is typically coupled to a portion behind the support of the safety footrest 150 on the pivot 126. A middle portion of the support of the safety footrest 150 includes a mounting location for securing a second end of the tension element 195 that opposes the first end of the tension element that is secured to the opening 118. In operation, the tension element 195 resides under tension between the respective mounting locations, in which the tension exerts a fu Linear loop that forces the support of the safety footrest 152 to remain in a separation relationship generally parallel to the safety footrest mounting link 160.

The safety footrest support 150 is configured to securely hold an ottoman, such as the footrest ottoman 45 of Figure 2. When the spring loaded ottoman support 180 extends along with the footrest assembly 200, the support of the safety footrest 150 holds the ottoman upwards from the footrest assembly 200 in a substantially horizontal orientation, thereby providing a raised leg support for an occupant of the seat unit. When the spring loaded ottoman support 180 is counter-coupled together with the footrest assembly 200, the safety footrest support 150 holds the ottoman against the footrest assembly 200 in a substantially vertical orientation such that the ottoman can serve as a front panel of the seat unit.

In embodiments, the safety footrest mounting link 160 includes a pin 119 (for example, the welded bushing or fastener) that is attached and projects transversely therefrom. The pivot link of the safety footrest 190 may include an arcuate groove 125 formed therein. The arcuate groove 125 may include an arc-shaped curvature that follows a consistent radius from the pivot 123. In addition, the arcuate groove 125 may be located at the lower end of the pivot link of the safety footrest 190 near the pivot 123. In addition , the arcuate groove 125 can receive a portion of the pin 119. In operation, the physical contact between a first end of the arc-shaped curvature of the arcuate groove 125 and the pin 119 prevents further counterclockwise rotation of the link pivot of the safety footrest 190 with respect to the footrest assembly 200 and the additional extension of the tension element 195. As the pivot link of the safety footrest 190 is rotated clockwise with respect to the footrest assembly 200, the pin 119 travels inside arched groove 125 until it finds a second end of the arc-shaped curvature. The physical contact between the pin 119 at the second end of the arc-shaped curvature helps to resist the contraction of the spring-loaded ottoman support 180.

Returning to Figures 8 and 9, the seat adjustment assembly 500, which reclines and tilts the backrest, will be explained below. In embodiments, the seat adjustment assembly 500 includes a front pivot link 430, a front lift link 440, a connection link 450, a rear lift link 460, a rear mount link 510, a rear support link 520, cam control link 540, sequence cam 550, footrest drive support 580, and footrest drive link 590. Initially, rear mount link 510 rotatably coupled to a back portion 402 of the seat mounting plate 400 on the pivot 405. In certain cases, the rear mounting link 510 may be configured to support a seat unit backrest. The rear support link 520 includes an upper end 523 and a lower end 524. The upper end 523 of the rear support link 520 is pivotally coupled to the rear mounting link 510 on the pivot 511, while the lower end 524 of the link Rear support 520 is pivotally coupled to rear base plate 416 or to a rear portion 412 of base plate 410 on pivot 521.

The rear lift link 460 is rotatably coupled to the seat mounting plate 400 on the pivot 462 and pivotally engages the rear base plate 416 or the rear portion 412 of the base plate 410 on the pivot 461. In addition , the rear elevation link 460 is pivotally coupled to the connection link 450 in the pivot 463. The connection link 450 includes a front end 451 and a rear end 452. The rear end 452 of the connection link 450 is pivotally coupled to the link. rear lift 460 on pivot 463. The front end 451 of the connection link 450 is pivotally coupled to the front lift link 440 on a pivot 443.

As illustrated in Figures 5 and 9, the front lift link 440 is rotatably coupled to the front portion 401 of the seat mounting plate 400 at the pivot 442. In addition, the front lift link 440 is pivotally coupled to the front end 451 of the connection link 450 at the pivot 443, while the front pivot link 430 is pivotally coupled to the front lift link 440 at the pivot 441. The front pivot link 430 includes an upper end 432 and a lower end 431. The upper end 432 of the front pivot link 430 is pivotally coupled to the front lift link 440 on the pivot 441, while the lower end 431 of the front pivot link 430 is pivotally coupled to the front base plate 415 or the front portion 411 of base plate 410 on pivot 433. It is

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dedr, as explained above, the base plate 410 may be formed by a single member (for example, a straight square tube) or may be composed of a plurality of formed plates.

As mentioned above, with respect to the second phase of movement, the footrest drive support 580 and the footrest drive link 590 interact to drive the footrest assembly 200 forward, by means of a directional force on the pivot 593 of the front ottoman link 110, or to retract the footrest assembly 200 backwards. The footrest drive support 580 is fixedly attached to one of the ends of the activator shaft 350. As illustrated in Figure 5, the footrest drive support 580 is fixedly attached to the right end of the actuator shaft 350 at a location towards the outside the rotational interface on the mounting plate of the activator 360. However, the precise location of the fixed attachment of the support of the footrest drive 580 to the activator shaft 350 may vary. For example, the embodiments of the present invention consider that a location of the fixed joint of the support of the footrest drive 580 is inwardly of the rotation interface on the mounting plate of the activator 360.

Typically, the footrest drive link 590 includes the front end 591 and the rear end 592. The rear end 592 of the footrest drive link 590 is pivotally coupled to an arm of the footrest drive support 580 extending radially from the activator shaft 350 at pivot 594. The front end 591 of the footrest drive link 590 is pivotally coupled to the front ottoman link 110 of the footrest assembly 200 at the pivot 593. In operation, the angular rotation of the actuator shaft linear actuator 350 directly affects the extended or folded configuration of the footrest assembly by means of the interaction of the footrest drive link 590 and the footrest drive support 580.

Turning now to Figures 7 and 8, the cam control link 540, the sequencing cam 550, and the sequence element 420 will be explained below. The cam control link 540 includes a front end 541 and a rear end 542. The front end 541 of the cam control link 540 pivotally engages the rear ottoman link 120 of the footrest assembly 200 at the pivot 275. In embodiments, the pivot 275 is slightly below and near the pivot. 121, which rotatably engages the rear ottoman link 120 to the front portion 401 of the seat mounting plate 400. The rear end 542 of the cam control link 540 pivotally engages the sequence cam 550 in the second pivot. 552. Sequence cam 550 rotatably engages seat mounting plate 400 in first pivot 551. In particular, first pivot 551 is located in a middle section of sequence cam 550, while an edge of c Ontact 554 is located on the segment of an outer surface of a front portion 553 of the sequence cam 550.

In embodiments, the sequence element 420 is configured as a welded bushing, a washer, a cylindrical shaped element, a fixing element (for example, screw or rivet), or any other nested component that moves or moves effortlessly along a face of the contact edge 554. In general, the sequence element 420 is fixedly connected to a middle section of the connection link 450. In one case, the sequence element 420 extends in a direction towards the interior substantially perpendicular from an inner side of the link connector 450. In operation, during the first phase of movement of the seat unit, the contact edge 554 of the sequence cam 550 ceases to be adjacent to the sequence element 420, thus allowing the seat adjustment assembly 500 to recline the rear mounting link 510 and, in turn, the backrest.

During the second phase of the movement, the contact edge 554 of the sequence cam 550 is rotated around the first pivot 551 (for example, counterclockwise with respect to Figures 7 and 8) to reside adjacent to the sequence element 420. That is, the adjustment of the footrest assembly 200 between the closed position (see Figure 7) and the extended position (see Figure 8), in turn, can actuate the cam control link 540 articulated sideways. This lateral action resulting from the contraction of the footrest assembly 200 (ie, rotating the rear ottoman link 120 inwardly around the pivot 121) causes the sequence cam 550 to rotate around the first pivot 551 such that the contact edge 554 moves down to face and potentially engage sequence element 420. Accordingly, rotation of sequence cam 550 changes a relative position of sequence element 420 with respect to contact edge 554.

This obstruction formed by the contact edge 554 of the sequence cam 550 that resides adjacent to the sequence element 420 prevents the forward movement of the seat mounting plate 400 (directly coupled to the sequence cam 550 in the first pivot 551) with respect to the base plate 410 (coupled to the sequence element 420 by means of the rear elevation link 460 and the connection link 450). Impending the movement of the seat mounting plate 400 with respect to the base plate 410, in effect, physically prevents the seat adjustment assembly 500 from reclining the rear mounting link 510 while, at at the same time, it allows the footrest assembly 200 to extend or contract the footrest ottoman (s). That is, when the seat unit is adjusted to the closed position (see Figure 7), the interaction between the sequence element 420 and the contact edge 554 of the sequence cam 550 prevents direct adjustment.

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from the seat unit to the reclined position (see figure 9). However, when the contact edge 554 is in a position adjacent to the sequence cam 550, the seat unit can be adjusted to the extended position (see Figure 8).

With the adjustment of the seat unit to the expanded position, the extension of the footrest assembly 200 causes the cam control link 540 to act forward in a lateral manner. This forward side action resulting from the extension of the footrest assembly 200 (ie, the rotation of the rear ottoman link 120 outwardly around the pivot 121) causes the sequence cam 550 to rotate around the first pivot 551 of such so that the contact edges 554 move upwards to face the sequence element 420 in the opposite direction. Consequently, the rotation of the sequence cam 550 eliminates the impediment that previously prevented the seat mounting plate 400 from being move with respect to the base plate 410 and, therefore, allows the movement of the second phase of the seat adjustment assembly 500.

Consequently, the sequencing described above ensures that the adjustment of the footrest assembly 200 between the closed and extended positions is not interrupted by the rotational thrust of the backrest, or vice versa. In other embodiments, the weight of the seat unit occupant and / or spring interconnect links of the seat adjustment assembly 500 aids in the creation or improvement of sequencing.

With reference to Figures 6 and 10, the lift assembly 700 will be explained below. The lift assembly 700 includes the lift connection plate 710, an upper lift link 720, a lower lift link 730, and the support bracket. elevation 740. The elevation assembly 700 is fixedly attached to a mirror image elevation assembly (not shown) by means of a front transverse tube 680, in which one end of the front transverse tube 680 can be fixedly attached to the link of lower elevation 730 directly or through the intervention of physical elements (for example, support 681). As explained in more detail above, the rear transverse tube 690 extends and attaches the base plate 410 to a complementary base plate in the mirror image link mechanism (not shown). In embodiments, the front transverse tube 680 and the rear transverse tube 690 can be formed by a square metal tube and can function as a set of transverse beams that securely secure the right link mechanism 100 and the left mirror image link mechanism in separate and parallel relationship.

In embodiments, the lift assembly 700 (shown) is fixedly attached to the right longitudinal member 640 of the lift base assembly 600 by means of the lift support 740 at the connection points 744 and 745, while the lift assembly The mirror image (not shown) is fixedly attached to the left longitudinal member 630. In addition, the lifting connection plate 710 is fixedly connected to the lifting support 740 by means of the connection point 743. As explained above, the point of connection 743 allows the assembly of the link mechanism 100 to the lifting base assembly 600 with a single fixing element (for example, the bolt with shoulder), thus simplifying the assembly process of joining the link mechanism 100 to the assembly of base of elevation 600 in such a way that the assembly can be easily realized after the shipment in the installations of a manufacturer of the seat unit.

Turning to Figure 10, the internal connections of the lifting assembly 700 will be explained below. In embodiments, the lifting connection plate 710 is fixedly attached to a respective longitudinal member of the lifting base assembly 600 by means of a lifting support 740 at connection point 743. In addition, the lifting connection plate 710 includes an upper end 713 and a lower end 714. The upper lift link 720 is pivotally coupled at one end to the front base plate 415, or to the portion from front 411 of the base plate 410, on the pivot 711. The upper lift link 720 is also rotatably coupled at the other end to the upper end 713 of the lift connection plate 710 on the pivot 741. The lower lift link 720 is pivotally coupled at one end to the front base plate 415, or front portion 411 of the base plate 410, at the pivot 712. In embodiments, the pivot 712 it is in front of and next to the pivot 711. The lower lift link 720 is rotatably coupled at the other end to the lower end 714 of the lifting connection plate 710 on the pivot 742.

In operation, lift links 720 and 730 are configured to pivot in a generally parallel separate relationship when the linear actuator adjusts the seat unit in and out of the seat lift position. In addition, the configuration of the elevation link 720 and 730 allows the base plate 410 to move in a path that is upward and inclined forward when it adjusts to the seat elevation position of Figure 10. As explained above, the movement in and out of the seat lift position occurs in the third phase of the linear actuator stroke, in which the motor activation block 340 longitudinally crosses the track 330 within the third displacement section 333.

In general, the lift assembly 700 is designed such that there is a relatively small amount of contact area between the link mechanism 100 and the lift base assembly 600. In particular embodiments, the entire contact area includes a region forward and a region backwards. The forward region is located along the front side member 610 in which the base front plate 415 and / or an edge of the lower lift link 730 meets an upper surface of the front side member

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tero 610 when the seat unit does not adjust to the seat lift position. The backward region is located at the top of the lifting support 740, which is welded to the lifting base assembly 600. The region backwards of the contact area is elevated above a frame comprising the lifting base assembly 600, thereby greatly minimizing any possibility of a rear pinch point when the seat unit moves down to the closed position. By eliminating the position of the rear pinch point, damage to fingers, pets or power cables to linear actuators is avoided.

The operation of the seat adjustment assembly 500 will be explained below with reference to Figures 8 and 9. Initially, an occupant of the seat unit may activate an adjustment from the reclined position (Figure 9) to the extended position (Figure 8 ) in an effort to sit upright to watch television. In an exemplary embodiment, the occupant can activate a drive in a manually operated controller that sends a control signal with instructions to the linear actuator. As explained above, the linear actuator 390 moves in a sequenced manner, which can be implemented by the weight of the occupant, a placement of the springs within the seat adjustment assembly 500 and / or a cam configuration sequence 550 with respect to sequence element 420. Typically, the movement of the linear actuator is sequenced in three substantially independent strokes: the first phase (the adjustment between the reclined and extended positions), the second phase (the adjustment between the positions extended and closed), and the third phase (the adjustment in and out of the seat lift position (see Figure 10) while the link mechanism 100 resides in the closed position).

With the reception of the control signal from the manually operated controller when the link mechanism 100 resides in the reclined position, the linear actuator makes a run in the first phase. That is, with reference to Figure 6, the linear actuator slides the motor activation block 340 forward with respect to the lift base assembly 600 (over the first travel section 331), while holding the relatively fixed motor mechanism 372 in the space. This sliding action of the motor activation block 340 activates the movement of the first phase (angular rotation over a first range of degrees) in the support of the footrest drive 580 around the rotation interface with the activator mounting plate 360 This movement of the first phase of the footrest drive support 580 pulls the link of the footrest drive 590 back a particular distance, which causes the seat mounting plate 400 to move over the base plate 410 in a manner toward back (by pivot 593). At this point, the seat mounting plate 400 is allowed to move backwards on the base plate 410 because the sequence cam 550 is removed from the proximity with the sequence element 420.

As explained above, the seat mounting plate 400 is pivotally coupled to the rear lift link 460 on the pivot 462. The travel backwards of the seat mounting plate 400 acts by means of the pivot 462 causing rotation in counterclockwise direction of the rear lift link 460 around pivot 461. This counterclockwise rotation moves the seat mounting plate 400 down and back with respect to the lift base assembly 600. The movement of the seat mounting plate 400 in this direction backwards pulls the rear mounting link 510, together with the backrest, downward on pivot 405 and causes the rear mounting link 510 to rotate forward around pivot 511.

In addition, counterclockwise rotation of the rear elevation link 460 around the pivot 461, which is activated by the movement back of the seat mounting plate 400, pushes the connection link 450 forward with respect to the base plate 410. This forward thrust in the connection link 450 moves the sequence element 420 (attached to the connection link 450) in front of a pivot path of the contact edge 554 of the sequence cam 550, thereby allowing the 550 sequence cam rotate down when adjusting the seat unit to the closed position. In addition, the forward thrust on the connection link 450 applies a directional force to the pivot 443 of the front lift link 440, which transmits the steering force via the front lift link 440 on the pivot 441 (by coupling the lift link front 440 to front pivot link 430). The steering force transmitted to the front pivot link 430 acts to lower the front portion 401 of the seat mounting plate 400 by means of a clockwise rotation of the front lift link 440 on the pivot 442. In this way, this clockwise rotation of the front lift link 440 around pivot 442 pulls the front portion 401 of the seat mounting plate 400 down and back in tandem with the rear portion 402 of the seat mounting plate . As a result, the seat mounting plate 400 is lowered uniformly and moved slightly back so that the seat carried by the seat mounting plate 400 is maintained at a constant angle of inclination during the adjustment between the reclined position and the closed position.

Eventually, the rotation of the activator shaft 350 and, consequently, of the support of the footrest drive 580 ceases when the linear actuator reaches the end of the first displacement section 331. At this point, the adjustment from the reclined position to the extended position It is substantially completed. The adjustment from the extended position to the reclined position operates substantially similarly, but vice versa, in the steps described above.

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The operation of the footrest assembly 200 will be explained below with reference to figures 7 and 8. As explained above, when it is desired to move from the extended position (figure 8) to the closed position (figure 7), the occupant You can activate a drive in the manually operated controller that sends the control signal with instructions to the linear actuator to carry out a run in the second phase. Upon receiving the control signal from the manually operated controller, the linear actuator slides the motor activation block 340 forward and upward with respect to the elevation base assembly 600 (over the second displacement section 332) while holding the motor mechanism 320 relatively fixed in space. This sliding action of the motor activation block 340 rotates the support of the footrest drive 580 around the rotation interface with the activator mounting plate 360. This clockwise rotation of the support of the footrest actuator 580 causes movement of the second phase (angular rotation over a second degree interval) in the support of the footrest 580 drive.

This movement of the second phase of the footrest drive support 580 pulls the footrest drive link 590 back a particular distance, which tries to make the seat mounting plate 400 move over the base plate 410 back ( by pivot 593). However, the seat mounting plate 400 is locked in the backward translation on the base plate 410, because the sequence cam 550 moves in proximity to the sequence element 420 such that the contact edge 554 meets sequence element 420.

However, the movement of the second phase (angular rotation over a second range of degrees) of the support of the footrest drive 580 serves to move the link of the footrest drive 590 backwards, which generates a directional force backwards in the pivot. 593. This translation backwards of the footrest drive link 590 pulls the front ottoman link 110 downwardly around the pivot 115 and rotates the rear ottoman link 120 downwardly around the pivot 121 by means of the upper ottoman link 140. The downward rotation of the rear ottoman link 120 around the pivot 121 produces a downward and backward force on the cam control link 540 by means of the pivot 275. This downward and backward force causes the control link of cam 540 moves back and forth by means of the second pivot 552, thereby causing sequence cam 550 to be rotated in direction or counterclockwise around the first pivot 551 (rotationally attaching the sequence cam 550 to the seat mounting plate 400).

Furthermore, the downward rotation of the front ottoman link 110 around the pivot 115 produces a downward and backward force on the lower ottoman link 130 and, indirectly, on the other links 120, 140 and 170, which pulls them towards the lifting base assembly 600. In one case, this force down and back on the front ottoman link 110 removes the front ottoman link 110 from the contact with a stopper element that serves to limit the extension of the footrest assembly. 200. In this way, the footrest ottomans retract to a position substantially below a leading edge of the seat.

Also, similar to the adjustment in the first phase, the movement of the second phase of the linear actuator generates a clockwise rotation of the support of the footrest drive 580. Finally, the clockwise rotation of the support of the actuator of the footrest 580 is resisted on one side of the support of the footrest actuator 580 in contact with an upper surface of the base plate 410, as shown in Figure 6. At this point, the adjustment from the extended position to the closed position is substantially completed.

In a manner that is inverse to the steps described above, with reference to the operation of the footrest assembly 200 from the closed position to the extended position, the automated force of the linear actuator on the support of the footrest actuator 580 in the first phase of the linear actuator stroke forces the link of the footrest drive 590 forward, which, in turn, rotates the front ottoman link 110 around the pivot 115. This rotation acts to extend the footrest assembly 200 and causes the other links 120, 130, 140, and 170 to move up and / or rotate clockwise, with reference to Figure 8. In addition, the support of the footrest 170 is raised and rotated clockwise so that the ottoman (45) (see Figures 1 to 3) is adjusted from a counter-oriented orientation, generally vertical, to an extended orientation, generally horizontal. The extension of the footrest assembly is restricted when the front ottoman 110 comes into contact with a stopper element or other stopping feature.

It should be understood that the construction of the link mechanism 100 leads to allow the different links and supports to be easily assembled and disassembled from the remaining seat unit components. Specifically, the nature of the pivots and / or assembly locations allows the use of quick disconnect equipment, such as a disassembled fastener. Consequently, a quick disconnection of the components is facilitated before shipping, or a quick connection at the reception.

The present invention has been described in relation to particular embodiments, which are intended in all aspects to be illustrative rather than restrictive. Alternative embodiments will be apparent to those skilled in the art to which the present invention belongs without departing from its scope.

It can be seen from the foregoing that this invention is one that is well adapted to achieve the ends and objects set forth above, and to achieve other advantages, which are obvious and inherent in the device. It will be understood that certain features and sub-combinations are useful and can be used without reference to other features and sub-combinations. This is contemplated by and within the scope of the claims. It will be appreciated by those skilled in the art that the present invention is not limited to what has been shown and described in particular above in the present specification. On the contrary, all matter in the present specification set forth or shown in the attached drawings should be interpreted as illustrative and not limiting.

Claims (6)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 1. A pair of link mechanisms generally in mirror image (100) adapted to move a seat unit (10) between a reclined, an extended, a closed position, and a seat elevation, having the seat unit (10) a pair of lift assemblies (700) that are adapted to adjust the seat unit (10) in and out of the seat lift position, a seat (15) that is angularly pushed by means of the lifting assemblies (700), and a backrest (25) that is angularly adjustable with respect to the seat (15), each of the linking mechanisms (100) comprising: a seat mounting plate (400) that includes a front portion, a middle portion, and a rear portion, in which the seat (15) is fixedly mounted to the seat mounting plate (400); a seat adjustment assembly (500) that reclines and tilts the backrest (25); a set of footrests (200) that extends and retracts at least one footrest ottoman (45); a cam control link (540) that includes a front end (541) and a rear end (542), in which the front end (541) of the cam control link (540) is pivotally coupled to the footrest assembly (200); a sequence cam (550) that includes a contact edge (554) and is rotatably coupled to the seat mounting plate (400) by means of a first pivot (551), in which the rear end (542) of the cam control link (540) is pivotally coupled to the sequence cam (550); a linear actuator that provides an automatic adjustment of the seat unit (10) between the closed position, the extended position, the reclined position, and the seat elevation position, in which the linear actuator adjustment is sequenced in a first phase, a second phase, and a third phase that exclude each other, in which the first phase moves the seat adjustment assembly (500) between the reclined position and the extended position, in which the second phase moves the footrest assembly (200) between the extended position and the closed position, and in which the third phase moves the pair of lifting assemblies (700) in and out of the seat lifting position while maintaining the pair of linkage mechanisms (100) in the closed position; Y a sequence element (420) extending outwardly from a respective link mechanism (100), in which, during the first phase adjustment, the contact edge of the sequence cam (550) is removed of the sequence element (420), thus allowing the seat adjustment assembly (500) to recline the backrest (25), and in which, during the second phase adjustment, the contact edge of the cam of Sequence (550) is adjacent to sequence element (420), which physically prevents the seat adjustment assembly (500) from reclining the backrest (25), while the footrest assembly (200) extends the at least one footrest ottoman (45). 2. The link mechanism (100) of claim 1, further comprising: a base plate; Y an activator shaft having a pair of ends, in which one of the ends of the activator shaft is rotatably coupled to the base plate. 3. The link mechanism (100) of claim 2, wherein the seat adjustment assembly (500) comprises: a footrest drive support that is fixedly attached to one of the ends of the activator shaft; Y a footrest drive link that includes a front end and a rear end, in which the footrest drive support is pivotally coupled to the rear end of the footrest drive link and the front end of the footrest drive link is pivotally coupled to the set of footrests. 4. The link mechanism (100) of claim 3, wherein the footrest assembly (200) comprises: a front ottoman link that is rotatably coupled to the front portion of the seat mounting plate (400); Y a rear ottoman link that is rotatably coupled to the front portion of the seat mounting plate (400) in a position behind the front ottoman link. 18 10 5. The link mechanism (100) of claim 4, wherein the front end of the footrest drive link is pivotally coupled to the front ottoman link, and wherein the front end of the cam control link (540) is pivotally coupled to the rear ottoman link. 6. The link mechanism (100) of claim 3, wherein the adjustment of the first phase of the linear actuator causes the footrest drive support to angularly push within a first range of degrees by means of the activator shaft, in the adjustment of the second phase of the linear actuator causes the footrest drive support to push angularly within a second range of degrees that does not overlap a first range of degrees, in which the angular thrust within the first range of degrees generates the movement of the seat adjustment assembly (500) while maintaining the at least one footrest ottoman (45) in an extended orientation, and in which the angular thrust within the second range of degrees generates the movement of the footrest assembly (200) while maintaining the backrest (25) in an inclined orientation.