DE102016119490A1 - Seat track assembly - Google Patents

Abstract

There is provided a seat track assembly having a first track member and a series of latching features and a second track member slidably received on the first track member. The seat track assembly may also include a latching mechanism having pawls movable between a locked state in engagement with the latching features to limit relative movement between the first and second rail members and between an unlocked condition in which release is made from the latching features to allow relative movement between the first and second rail members. The pawls may each include latching members received within associated ones of a series of latching features in the latched condition such that the latching members prevent relative movement between the first and second rail members in two directions when the pawls are in the latched condition.

Description

The present invention relates to seat track assemblies, and more particularly to a seat track assembly locking mechanism.

This section provides background information with respect to the present disclosure and does not necessarily depict prior art.

Modern vehicles typically include at least one seat assembly that is movable in an anterior-posterior direction relative to a floor panel of a vehicle. For example, a sports utility vehicle (SUV) or minivan may include a driver seat assembly, a passenger seat assembly, and a second row seat assembly, all of which are movable in an anterior-posterior direction with respect to the floor panel of the vehicle are. Movement of the previous seat assemblies allows a user to adjust a position of the subject seat assembly with respect to vehicle controls and / or gain access to an area here generally behind the seat assembly. For example, adjustment of a driver seat assembly relative to a floor panel of a vehicle allows the driver to move the seat assembly closer or farther away from a steering wheel of the vehicle. Similarly, adjusting the passenger seat assembly in the front-rear direction with respect to a floor panel of a vehicle allows a user to adjust a position of the passenger seat with respect to controls of the vehicle and / or in an area behind the passenger seat to gain access to a passenger seat in second row or to gain access to a trunk area of the vehicle.

Seat assemblies that can move in an anterior-posterior direction with respect to a floor panel of a vehicle typically include a seat track assembly that permits such movement. Such seat track assemblies typically include a first component secured to a floor panel of a vehicle and a second component mounted for movement with a vehicle seat. The second component is selectively movable with respect to the first component and thus permits selective movement of the seat assembly relative to the first component. By allowing movement of the second component and the seat assembly with respect to the first component, movement of the seat assembly and the second seat component with respect to the floor panel of the vehicle is likewise enabled.

While conventional seat assemblies include a seat track assembly that permits selective adjustment of a vehicle seat in an anterior-posterior direction with respect to a floor panel of a vehicle, such seat track assemblies do not provide a user with the ability to change a position of the seat assembly relative to the floor panel Set units. Further, conventional seat assemblies typically require a user to move the seat assembly more than five millimeters (5 mm) in either the forward or backward direction after an actuating mechanism is released to allow a locking mechanism associated with the seat track assembly Position of the seat assembly with respect to the bottom plate suitably take and fix. Finally, although conventional seat track assemblies adequately fix a position of a seat assembly relative to a floor panel of a vehicle, seat track assemblies may experience some rattling or "chattering" during use caused by relative movement between the various components of the seat track assembly, thereby causing damage during use an undesirable noise is generated.

This section provides a general summary of the disclosure and is not a complete disclosure in its entirety or with all features.

In one form, the present disclosure provides a seat track assembly that may include a first track member having a series of locking features, and a second track member slidably received on the first track member. A latching mechanism may be at least partially disposed between the first rail member and the second rail member and may include at least two pawls that between a locked state engage the latching features for limiting relative movement between the first rail member and the second rail member and between an unlocked condition are moved, wherein the locking features are released to allow relative movement between the first rail member and the second rail member. The at least two pawls may each comprise at least two latching members received within associated ones of the series of latching features in the latched state such that each of the latching members simultaneously provides relative movement between the first rail member and the second rail member in two directions limited when the pawls are in the locked state.

In another embodiment, the present disclosure provides a seat track assembly that may be a seat track assembly that may include a first rail member having a series of locking features and a second rail member slidably received on the first rail member. A latching mechanism may be at least partially disposed between the first rail member and the second rail member and may include at least two pawls that between a locked state in which the locking features are engaged to limit relative movement between the first rail member and the second rail member , and are moved to an unlocked state in which release is made from the locking features to allow relative movement between the first rail member and the second rail member. The at least two pawls may each comprise at least two locking members that are in contact with the first rail member at two locations within each of the latching features when in the latched condition.

In another embodiment, the present disclosure provides a seat track assembly that may include first and second track members and a latch mechanism. The first rail member may include a series of locking features. The second rail element may be slidably received on the first rail element. The locking mechanism may be at least partially disposed between the first rail member and the second rail member and may include first, second and third pawls which independently of each other between a locked state in which engaging with the locking features to a relative movement between the in first rail member and the second rail member, and are moved to an unlocked state in which a release of the locking features is carried out to allow relative movement between the first rail member and the second rail member. Each of the first, second and third pawls may include a latch member received within a respective one of the series of latching features in the latched condition. The locking features may each have a width that is at least twice as wide as a width of each of the locking members, such that the locking members of the first, second and third locking pawls simultaneously move relative to each other between the first rail member and the second rail member in two directions limit when the two of the pawls are in the locked state. At least one of the pawls may be in the unlocked state at any time.

In some configurations, a plurality of locking members extend from opposite ends of each of the pawls and are received in associated latching features when the pawls are in the locked state.

In some configurations, only a single locking element extends from each end of the pawls.

In some configurations, the seat rail includes an actuator that is operable to selectively apply force to any two of the first, second, and third pawls to hold the two of the pawls in the unlocked state.

In some configurations, at least one of the pawls in the unlocked state upon release of the force is independent of the positioning of the second rail member with respect to the first rail member.

In some configurations, relative movement between the first rail member and the second rail member is limited to one-half the width of one of the latching features after release of the force before the latching members are received by the two of the pawls within associated latching features.

In some configurations, the actuator includes an elongate strut that extends parallel to longitudinal axes of the first and second rail members, and wherein the elongate strut has a pin that extends perpendicular to the longitudinal axes and through an opening in the second rail member.

In some configurations, the elongate strut selectively exerts a force on the pawls to hold the pawls in the unlocked state.

In some configurations, the seat track assembly includes a housing received on the second rail member and disposed between the first rail member and the second rail member. The housing may define a cavity in which the elongate strut is movably received. Everyone the pawl may include an actuating arm which extends into the cavity and is reciprocated therein when the pawls are moved between the locked and unlocked states.

In another embodiment, the present disclosure provides a seat track assembly having first and second rail members and a locking mechanism. The first rail member may include a series of locking features. The second rail member may be slidably received by the first rail member. The locking mechanism may be at least partially disposed between the first rail member and the second rail member and having first and second pawls independently locking between a locked state and the locking features to limit relative movement between the first rail member and the second rail member. are moved, and an unlocked state in which a release of the locking features is carried out to allow relative movement between the first rail member and the second rail member. Each of the pawls may include interlocking elements that are received in the locked state in an associated one of the series of interlocking features. The first pawl may include a plurality of locking members extending from opposite ends of the first pawl. The second pawl may have only a single locking element extending from each end of the second pawl.

In some embodiments, the locking features each have a width that is greater than a width of one of the locking elements of the first locking pawl and that is substantially equal to a width of one of the locking elements of the second locking pawl.

In some embodiments, the seat track assembly includes a third pawl that is movable between the locked and unlocked states independently of the first and second pawls.

In some embodiments, the second pawl is disposed between the first and third pawls.

In some implementations, the seat track assembly includes an actuator that is operable to selectively apply force to any two of the first, second, and third pawls to hold the two pawls in the unlocked state.

In some embodiments, at least one of the pawls in the locked state is for release of the force independent of the positioning of the second rail member with respect to the first rail member.

In some embodiments, relative movement between the first rail member and the second rail member is limited to one-half the width of one of the locking features following release of the force prior to the locking members being received by the two pawls within associated latching features.

In some embodiments, the seat track assembly includes an actuator that is operable to selectively apply force to the pawls to hold the pawls in the unlocked state.

In some embodiments, the actuator has an elongate strut that extends parallel to longitudinal axes of the first and second rail members. The elongated strut may comprise a pin extending perpendicular to the longitudinal axes and through an aperture in the second rail member.

In some embodiments, the seat track assembly includes a housing secured to the second track member and received between the first track member and the second track member. The housing may define a cavity in which the elongate strut is movably received.

In some embodiments, each of the pawls includes an actuating arm that extends into the cavity and is reciprocated therein as the pawls move between the locked and unlocked states.

In some embodiments, the first rail member and the second rail member are movable in two opposite directions with respect to each other along an axis when the locking mechanism is in the unlocked state.

Further applications are clear from the description given here. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

The drawings described herein are merely exemplary in nature for particular embodiments and do not include all embodiments and are not intended to limit the scope of the present disclosure.

1 Figure 3 is a partial perspective view of a seat assembly with a seat track assembly in accordance with the principles of the present disclosure;

2 is a perspective view of a rail assembly of the seat rail assembly according to 1 ;

3 is a partial perspective view of the rail assembly according to 2 ;

4 is a cross-sectional view of the rail assembly according to 3 along the line 4-4;

5 is an exploded view of the rail assembly according to 3 ;

6 is a perspective view of a pawl of the rail assembly according to 2 ;

7 is a perspective view of a pawl of the rail assembly according to 2 ;

8th is a perspective view of a pawl of the rail assembly according to 2 ;

9 is a perspective view of a pawl of the rail assembly according to 2 ;

10 is a perspective view of a pawl of the rail assembly according to 2 ;

11 is a perspective view of a pawl of the rail assembly according to 2 ;

12 is a perspective view of a pawl of the rail assembly according to 2 ;

13 is a perspective view of a pawl of the rail assembly according to 2 ;

14 is a partial perspective view of the rail assembly according to 2 showing two pawls in a raised and locked state;

15 is a cross-sectional view of the rail assembly according to 14 along the line 15-15;

16 is a cross-sectional view of the rail assembly according to 14 along the line 16-16;

17 is a schematic representation of a portion of a rail of the rail assembly according to 2 that illustrates locking features;

18 Figure 3 is a partial perspective view of a seat assembly with a seat track assembly in accordance with the principles of the present disclosure;

19 is a perspective view of a rail assembly of the seat rail assembly according to 18 ;

20 is a cross-sectional view of the rail assembly according to 18 along the line 20-20;

21 is an exploded view of the rail assembly according to 19 ;

22 is a partial cross-sectional view of the rail assembly according to 18 in an unlocked state along line 22-22;

23 is a partial cross-sectional view of the rail assembly according to 18 in a locked state along the line 23-23;

24 is a partial cross-sectional view of the rail assembly according to 18 in a locked state along line 24-24;

25 is a schematic representation of a portion of a rail of the rail assembly according to 18 representing locking features;

26 FIG. 4 is an exploded perspective view of a latch mechanism according to the principles of the present disclosure; FIG.

27 is a partial cross-sectional view of the locking mechanism according to 26 installed in a seat track assembly;

28 FIG. 12 is a cross-sectional view of a portion of a rail of the seat track assembly according to FIG 27 showing locking features;

29 FIG. 4 is an exploded perspective view of a latch mechanism according to the principles of the present disclosure; FIG.

30 is a partial cross-sectional view of the locking mechanism according to 29 installed in a seat track assembly;

31 FIG. 12 is a cross-sectional view of a portion of a rail of the seat track assembly according to FIG 30 in a first position;

32 is a cross-sectional view of a portion of the rail in a second position;

33 is a cross-sectional view of a portion of the rail in a third position;

34 FIG. 4 is an exploded perspective view of a latch mechanism according to the principles of the present disclosure; FIG.

35 is a partial cross-sectional view of the locking mechanism according to 34 installed in a seat track assembly;

36 FIG. 12 is a cross-sectional view of a portion of a rail of the seat track assembly according to FIG 35 in a first position;

37 is a cross-sectional view of a portion of the rail in a second position;

38 is a cross-sectional view of a portion of the rail in a third position;

39 FIG. 4 is an exploded perspective view of a latch mechanism according to the principles of the present disclosure; FIG.

40 is a partial cross-sectional view of the locking mechanism according to 39 installed in a seat track assembly;

41 FIG. 12 is a cross-sectional view of a portion of a rail of the seat track assembly according to FIG 40 showing locking features;

42 FIG. 4 is an exploded perspective view of a latch mechanism according to the principles of the present disclosure; FIG.

43 is a partial cross-sectional view of the locking mechanism according to 42 installed in a seat track assembly;

44 FIG. 12 is a cross-sectional view of a portion of a rail of the seat track assembly according to FIG 43 in a first position;

45 is a cross-sectional view of a portion of the rail in a second position; and

46 is a cross-sectional view of a portion of the rail in a third position.

Corresponding reference numbers indicate corresponding parts in the several views of the drawing.

Exemplary embodiments will now be described in more detail with reference to the accompanying figures.

Exemplary embodiments are provided so that the disclosure is exhaustive and its scope fully apparent to those skilled in the art. Numerous specific details are set forth in such examples of particular components, devices, and methods to provide a thorough understanding of the teachings of the present disclosure. It will be understood by those skilled in the art that specific details need not be employed, that exemplary embodiments may come in many different forms, and that neither should limit the scope of the disclosure. In some exemplary embodiments, well-known methods, well-known device structures, and well-known technologies are not described in detail.

The terminology used herein for this purpose is intended only to describe particular embodiments and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" may be intended to indicate the plural forms, as well as others, if the context evidently means otherwise. The terms "including," "having," "including," and "having" are inclusive, and therefore, specify the presence of the features, items, steps, acts, elements, and / or components involved, but do not exclude the presence or the addition one or more other features, parts, steps, acts, elements, components, and / or groups thereof. The method steps, methods, and operations described herein are not designed to require necessarily their performance in the particular order discussed or described herein unless specifically described as an order of performance. It is further understood that additional or alternative steps may be used.

When an element or layer is described as being "on,""engaged,""connectedto," or "coupled to" another element or layer, it may be directly on, engaged, coupled to, or coupled to other element or layer, or other intervening elements or layers may be present. In contrast, if an element is referred to as being "directly on,""directly engaged with,""directly connected to," or "directly coupled to" another element or layer, then there are no intervening elements or layers. Other words used to describe the relationship between elements should be understood in a corresponding manner (eg, "between" versus "directly between,""adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" means that some or all of the components may be present with one or more of the associated designated portions.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers, and / or portions of these elements, these elements, components, regions, Layers and / or sections should not be limited by these terms. These terms can also be used to distinguish one element, component, region, layer or section from another section, layer or section. Terms such as "first", "second", and other numerical terms are not intended to indicate an order or arrangement when used unless clearly indicated by the context in question. Thus, a first element, a first component, a first region, a first layer, or a first portion may be referred to as a second element, a second component, a second region, a second layer, or a second portion, as described below Deviating teaching of the embodiments.

Spatially cohesive terms such as "within," "outside," "below," "below," "lower," "above," "uppermost," and the like, may be used herein to refer to an element or a ratio of a feature to describe another element (s) or feature (s) as shown in the figures. Spatially relative terms may be used to describe different orientations of the devices in use with respect to the orientation shown in the figures. For example, if the device in the figures is turned over, elements described as "below" or "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" may include both an orientation above and below. The device may be oriented differently (rotated by 90 degrees or at other angles) and the spatially relevant descriptors are to be interpreted accordingly.

With particular reference to the 1 and 2 becomes a seat track assembly 10 for use with a seat assembly 12 provided. The seat rail arrangement 10 may be a first rail arrangement 14 and a second rail assembly 16 which cooperate to selectively adjust the seating arrangement 12 back and forth with respect to an external structure such as, for example, a floor panel of a vehicle (not shown). The first rail arrangement 14 and the second rail assembly 16 can be identical both in structure and in function. Accordingly, only the first rail arrangement 14 described and illustrated in detail.

The first rail arrangement 14 can be a bottom rail 18 mounted on a floor panel of a vehicle (not shown), an upper rail 20 in relation to the floor panel at the bottom rail 18 slidably received, and a locking mechanism 22 at least partially between the lower rail 18 and the upper rail 20 is arranged. In operation, the locking mechanism 22 selectively a position of the upper rail 20 in relation to the lower rail 18 determine when a locked condition exists, and may be a movement of the upper rail 20 in relation to the lower rail 18 in an unlocked state.

The lower rail 18 may be attached to the floor panel by any suitable method, for example by welding and / or riveting. The lower rail 18 can be a bottom wall 24 and a pair of side walls 26 generally extending from the bottom wall 24 extend out. The bottom wall 24 can be a sequence of openings 25 which are integral with the side walls 26 are formed. As such, the bottom wall can 24 with the side walls 26 interact to form a channel 28 forming substantially along a length of the lower rail 18 extends. The side walls 26 can also have a channel 30 which extends along a length of each side wall 26 extends and the a series of locking features 32 that includes a series of projections 34 are separated from each other.

The locking features 32 may each have a width that is substantially equal to 10 mm, for example, such that middle portions of adjacent locking features 32 spaced apart from each other by about 20 mm ( 17 ). As in 17 shown are adjacent locking features 32 from each other by a projection 34 separated, which may also have a width of substantially 10 mm. As will be described in more detail below, each locking feature 32 divided into a first half (A) and a second half (B), each to a part of the locking mechanism 22 to accommodate and position it to move the upper rail 20 in relation to the lower rail 18 to selectively prevent.

As shown above, the lower rail picks up 18 the upper rail 20 slidable on to a selective movement of the upper rail 20 in relation to the lower rail 18 to allow. Such movement may be facilitated by a ball cage assembly (not shown) located at least partially within the channels 30 the side walls 26 is included. The ball cage assembly may include a housing and a series of ball bearings (not shown). The ball bearings are enclosed by the housing but may rotate relative thereto. Such rotation of the ball bearings relative to the housing facilitates movement of the upper rail 20 in relation to the lower rail 18 when the locking mechanism 22 in the unlocked state.

With particular reference to the 4 and 5 is the upper rail 20 shown a ceiling wall 36 and a pair of side walls 38 having. The ceiling wall 36 can with the side walls 38 be integrally formed, each of the side walls 38 a channel 40 substantially along a length of the upper rail 20 extends. The ceiling wall 36 can be a sequence of openings 42 which include a part of the locking mechanism 22 in it, while the sidewalls 38 a series of slots 44 may substantially coincide with the openings 42 can be aligned and also part of the locking mechanism 22 can record in it. Finally, the top rail 20 a series of fasteners (not shown) that can be used to form part of the seat assembly 12 ( 1 ) on the upper rail 20 to fix. The fasteners may be used to form part of the seat assembly 12 on the upper rail 20 to attach it to allow the seating arrangement 12 with the upper rail 20 is moved when the upper rail 20 in relation to the lower rail 18 is moved.

With particular reference to the 3 - 5 is the locking mechanism 22 shown, which is a series of pawls 46 , a series of biasing elements 48 and a mounting bracket 50 having. The pawls 46 can be inside the upper rail 20 generally between the ceiling wall 36 and the side walls 38 be included, and can have a main body 52 , a pair of locking arms 54 and an actuating arm 56 exhibit. The locking arms 54 and the actuating arm 56 Can be integral with the main body 52 ( 6 ) be formed. Alternatively, the actuating arm 56 on the main body 52 by means of a suitable method, such as, for example, riveting and / or welding ( 4 and 5 ) be attached.

In one configuration, the biasing elements 48 Coil springs are generally part of the actuator arm 56 enclose and inside a bag 58 ( 4 ) of the pawls 46 are included. The pretensioning elements 48 are inside the bag 58 taken when the mounting bracket 50 once with respect to each pawl 46 and biasing element 48 is positioned to allow that the mounting bracket 50 the pawl 46 and the biasing element 48 in relation to the upper rail 20 appropriately positioned and holding.

The mounting support 50 can be a bottom wall 60 and a pair of upwardly extending arms 62 exhibit. A part of each arm 62 can be through openings 64 the ceiling wall 36 the upper rail 20 extend to allow it, that the arms 62 with the upper rail 20 be riveted or otherwise secured. A fastening of the arms 62 the mounting bracket 50 at the top rail 20 Holds the pawls 46 and the biasing elements 48 in a desired position generally between the bottom wall 60 the mounting bracket 50 and the ceiling wall 36 the upper rail 20 ,

While the locking mechanism 22 has been described and shown so as to be a pawl 46 with a main body 52 , a pair of locking arms 54 and an actuating arm 56 that coincides with the main body 52 riveted ( 4 and 5 ) or in one piece therewith ( 6 ), could be the locking mechanism 22 alternatively have a pawl, which any of the in the 7 - 13 having shown configuration. Given the largely similar structure and function of the components with the pawl 46 with regard to in the 7 - 13 The same reference numerals are used in the drawing to designate like components, while like reference numerals followed by letters are used to designate those components which have been modified.

For example, the pawls could 46 through the pawl 46a according to 7 be replaced. The pawl 46a is similar to the pawl 46 by the pawl 46a a main body 52a comprising a pair of integrally molded locking arms 54a having. However, the pawl points 46a no operating arm, which is connected to the main body 52a riveted or otherwise attached thereto, but instead has an integrally molded actuating arm 56a on. The actuating arm 56a can be from a part of the main body 52a be formed, creating such a cavity 66 in the main body 52a is formed, if Material is used to control the actuating arm 56a to build.

With particular reference to 8th is another pawl 46b shown a top lid 68 and a locking plate 70 having. The upper lid 68 may be part of the biasing element 48 can absorb in and through the openings 42 the upper rail 20 extend as soon as it is mounted on it. The locking plate 70 can the upper lid 68 generally enclose and can of a sequence of tabs 72 of the upper lid 68 be positioned. The locking plate 70 can be a pair of locking arms 54b as well as a central opening 74 have the upper lid 68 receives.

With particular reference to 9 is a pawl 46c shown a main body 52c comprising a first component 76 comprising a metal material and a second component 78 formed of a plastic material. During assembly becomes the second component 78 on the first components 76 sprayed in such a way that part of the first component 76 and a part of the second component 78 through the openings 42 the upper rail 20 extend to an actuating arm 56c to build. The first component 76 can with the second component 78 interact to form the biasing element 48 in with respect to the pawl 46c and the and the support bracket 50 to pick up and position in a suitable manner. Once at the top rail 20 attached, can be the first component 76 and the second component 78 through the openings 42 extend while the locking arms 54c the first component 76 slidable within the slots 44 the upper rail 20 are included.

With particular reference to 10 is a pawl 46d shown. The pawl 46d can be a main body 52d and a locking plate 80 exhibit. The main body 52d may be formed of plastic and may be an integrally formed actuating arm 56d exhibit. The locking plate 80 can be a pair of locking arms 54d and may be attached to the main body 52d be attached to the movement with it. The main body 52d and the locking plate 80 may be part of the biasing element 48 pick it up to allow the biasing element 48 a force on the main body 52d and thus on the locking plate 80 exerts when the main body 52d and the locking plate 80 between the mounting bracket 50 and the upper rail 20 are arranged. Once assembled, the actuator arm can become 56d through the openings 42 the upper rail 20 extend while the locking arms 54d inside the slots 44 the upper rail 20 are slidably received.

With particular reference to the 11 and 12 be a pair of pawls 46e and 46f specified. The pawls 46e respectively. 46f have an upper lid 68e . 68f on and are each for movement with a corresponding locking plate 70e . 70f established. The locking plates 70e . 70f can have a pair of locking arms 54e respectively. 54f can and can along the top lid 68e . 68f through the biasing element 48 be biased once at the top rail 20 by means of the mounting bracket 50 are mounted. The pawls 46e . 46f are essentially identical in terms of having an upper portion of each upper lid 68e . 68f an actuating arm 56e . 56f extending through the openings 42 the upper rail 20 extends, and a pair of locking arms 54e . 54f which is sliding within the slots 44 the upper rail 20 is included when mounting on the upper rail 20 he follows. The only difference between the pawl 46e and the pawl 46f is that the upper lid 68e the pawl 46e is formed of a plastic material, while the upper lid 68f the pawl 46f is formed of a metallic material, such as steel.

With reference to 13 becomes a pawl 46g specified. The pawl 46g can be a main body 52g , a pair of locking arms 54g , and an actuating arm 56g exhibit. As with the pawl 46a ( 7 ) is both the locking arm 54g as well as the actuating arm 56g integral with the main body 52g educated. However, the pawl points 46g in addition a pair of support arms 82 on, which serve to the biasing element 48 further inside the main body 52g to hold when the pawl 46g at the top rail 20 by means of the mounting bracket 50 is attached. Once assembled, the actuator arm can become 56g through the openings 42 the upper rail 20 extend while the locking arms 54g inside the slots 44 the upper rail 20 are slidably received.

Although the locking mechanism 22 any of the previous pawls 46 . 46a . 46b . 46c . 46d . 46e . 46f . 46g may be, the locking mechanism 22 below described and illustrated that he has four pawls 46 each having an actuating arm 56 have that with the main body 52 ( 4 and 5 ) riveted or fastened in another way. The four pawls 46 are in relation to the upper rail 20 positioned so that a part of the actuating arm 56 through the relevant openings 42 the upper rail 20 ( 2 - 4 ) extends. Furthermore, the pawls 46 in relation to the upper rail 20 positioned so that the locking arms 54 extend through and inside the slots 44 the upper rail 20 ( 4 and 14 ) are slidably received.

Are the pawls 46 once in a suitable manner with respect to the upper rail 20 positioned so that the actuating arms 56 through the openings 42 extend and the locking arms 54 through the slots 44 extend, the biasing elements 48 each via the actuating arms 56 ( 4 ). At this point, the mounting bracket can 50 with respect to each pawl 46 ( 4 ) may be relatively positioned and may be on the upper rail 20 ( 2 ) be attached to the pawls 46 and the biasing elements 48 generally between the ceiling wall 36 the upper rail 20 and the bottom wall 60 the mounting bracket 50 to keep. At this point, the biasing elements practice 48 a force on the main body 52 every pawl 46 out, causing the pawls 46 towards the ceiling wall 36 the upper rail 20 be biased.

By the main body 52 caused to the ceiling wall 36 the upper rail 20 to move and attack it, are also the operating arms 56 the pawls 46 caused by the ceiling wall 36 the upper rail 20 through the openings 42 to extend. The operating arms 56 and thus the main body 52 and the locking arm 54 from each pawl 46 can from the ceiling wall 36 the upper rail 20 moved away, if a force on the operating arms 56 generally on the part of the operating arms 56 is exercised, passing through the openings 42 extends. Such a force must be sufficient to that of the main body 52 by means of the biasing element 48 overcome applied force, and thus it causes the operating arms 56 at least partially in the upper rail 20 between the ceiling wall 36 and the side walls 38 withdraw. Because the actuating arms 56 to move with the main body 52 and the locking arms 54 are fixed, causes a movement of the actuating arms 56 in the upper rail 20 that the main body 52 from the ceiling wall 36 moved away and causes the locking arms 54 the slots 44 traverse and get off the ceiling wall 36 to the channels 40 the side walls 38 the upper rail 20 move.

With particular reference to 1 is the seat track assembly 10 shown in the seating arrangement 12 is integrated. The seating arrangement 12 can be at the top rail 20 be secured such that the seat assembly 12 to move with the upper rail 20 in relation to the lower rail 18 is fixed. The seating arrangement 12 may be an actuator assembly 84 ( 2 ) having a selective movement of the actuating arms 56 in relation to the upper rail 20 allowed. The actuator assembly 84 can have one or more supports 86 have a number of openings 88 exhibit. The openings 88 may be positioned relative to each other such that each opening 88 an actuating arm 56 receives. As such, an interaction between the apertures is fixed 88 and the operating arms 56 the pawls 46 the pillars 86 the actuator assembly 84 to move with the operating arms 56 the pawls 46 ,

The pillars 86 can on an arm 90 the actuator assembly 84 be attached, the movement between the supports 86 coordinated. A coordination between the respective columns 86 allows the actuator assembly 84 , the pawls 46 from a locked state to an unlocked state substantially simultaneously to selectively adjust the upper rail 20 and thus the seating arrangement 12 in an anterior-posterior direction with respect to and within the lower rail 18 as will be described in more detail below. In one embodiment, the arm 90 swiveling from a pair of mounting flanges 92 added to the upper rail 20 are attached or formed integrally therewith. The mounting flanges 92 can have a pivot 94 pick up the arm 90 in relation to the ceiling wall 36 the upper rail 20 to keep it rotatable.

With particular reference to the 15 - 17 is now the work of the seat rail assembly 10 described in detail. If the main body 52 the pawls 46 towards the ceiling wall 36 the upper rail 20 by means of the biasing element 48 are biased, the actuating arms extend 56 from the ceiling wall 36 and exert an upward force on the supports 86 the actuator assembly 84 out. In this position are the locking arms 54 the pawls 46 within an upper part of the slots 44 arranged and are in corresponding locking features 32 the lower rail 18 added. A positioning of the locking arms 54 in terms of locking features 32 the lower rail 18 brings the seat track assembly 10 in the locked state and thus limits a shift of the upper rail 20 in relation to the lower rail 18 ,

While the locking arms 54 the pawls 46 are described as being on the locking features 32 attack is the locking mechanism 22 designed so that only two of the pawls 46 at the locking features 32 the lower rail 18 to attack a given time. As such, there are four locking arms 54 (ie two locking arms 54 of two pawls 46 ) each within four locking features 32 the lower rail 18 added. When the locking arms 54 within the locking features 32 are included, is the upper rail 20 through the four locking arms 54 prevented in relation to the lower rail 18 to move.

The locking features 32 can have at least one tapered surface 96 such that each locking feature 32 in its width in the direction (X) according to 17 decreases. By every locking feature 32 the lower rail 18 is provided with a decreasing width in the direction (X), it allows the biasing elements 48 , the locking arms 54 in the locking features 32 and engaged with the lower rail 18 regardless of dimensional tolerances between the pawls 46 or the lower rail 18 , The locking arms 54 namely move further into the locking features 32 until the locking arms 54 within each locking feature 32 are wedged and securely in contact with a lead 34 the lower rail 18 are. The previous relationship reduces chattering between the numerous components and thus clamping detection during use.

As described, only two out of four pawls engage at a given time 46 at the locking features 32 the lower rail 18 at. The other two pawls 46 are essentially out of phase with the locking features 32 and out of phase with the locking features 32 and grab the projections 34 on, between the locking features 32 ( 16 ) are provided. The locking arms 54 may have a width of substantially 5 mm, such that a total clearance of 5 mm within each locking feature 32 exists when the locking arms 54 within the locking features 32 are included. In particular, every locking feature 32 has a width of 10 mm, a total of 5 mm clearance between the locking arm 54 and the lower rail 18 provided when a locking arm of 5 mm inside the locking feature 32 of 10 mm is recorded.

When the locking arm 54 initially within the lock feature 32 is absorbed, the locking arm can 54 generally within the locking feature 32 move - caused by a relative movement between the upper rail 20 and the lower rail 18 - until the locking arm 54 enters one of the sectors (A) or (B) and at an adjacent projection 34 attacks. A movement of the locking arm 54 in one of the sectors (A) or (B) determines which of the other locking arms 54 at the locking features 32 the lower rail 18 attacks and which of the other locking arms 54 will be out of phase and at the tabs 34 attacks. For example, if the locking arms 54 a first pawl 46 within the sector (A) of one of the locking features 32 can be added, a second pawl 46 at a locking feature 32 attack. However, if the locking arms 54 the first pawl 46 within the sector (B) of the same interlocking feature 32 is included, the second pawl 46 be out of phase and at a head start 34 attack. In this state, one of the other pawls 46 (ie a third pawl 46 or a fourth pawl 46 ) on another locking feature 32 Attack to the locking mechanism 22 to bring into the locked state.

The above relationship represents the seat track assembly 10 with an increment of 5 mm while setting with a maximum travel of 2.5 mm ready to make it a second pawl 46 to allow, at the lock features 32 attack. In particular, the pawl must 46 Only 2.5 in one way or the other before proceeding to an adjacent projection 34 engages and fully in the sector (A) or (B) moves, if the first pawl 46 within a locking feature 32 in the middle of the locking feature 32 is included. In view of the above description it is understood that the locking mechanism 22 is a positive engaging locking mechanism (PEL). That is, at least one of the pawls 46 gets inside the locking features 32 in the lower rail 18 upon release of the actuator assembly 84 regardless of the position of the upper rail 20 in relation to the lower rail 18 ,

Once are two of the pawls 46 safely within two associated locking features 32 the lower rail 18 picked up, so is the top rail 20 , and thus the seating arrangement 12 prevented in relation to the lower rail 18 to move. The seating arrangement 12 can only in relation to the lower rail 18 be moved when a force on the actuator assembly 84 is exercised, which causes the supports 86 a force on the operating arms 56 the pawls 46 occupies. The application of a force on the actuator arms 56 causes the actuator arms 56 also a force on the biasing elements 48 over the main body 52 exercise, causing a compression of the biasing elements 48 causes. A movement of the main body 52 against the biasing elements 48 also causes a movement of the locking arms 54 in one direction, generally from the ceiling wall 36 the upper rail 20 and within each slot 44 is directed away.

Sufficient movement of the locking arms 54 inside each slot 44 in a direction that is essentially from the ceiling wall 36 the upper rail 20 is removed, causes the locking arms 54 move to the unlocked state and lock features 32 solve what is such a movement of the upper rail 20 and thus the seating arrangement 12 in relation to the lower rail 18 allowed. The pawls 46 are automatically returned to the locked state when placed on the supports 86 applied force due to the biasing elements 48 eliminated. In particular, the biasing elements 48 once again the main body 52 and thus the locking arms 54 every pawl 46 bias into a locked state when applied to the actuator arms 56 through the supports 86 applied force is eliminated. The pretensioning elements 48 namely, the locking arms 54 inside each slot 44 generally towards the ceiling wall 36 the upper rail 20 can move and two of the pawls 46 in engagement with the locking features 32 bring. Are the locking arms 54 once within the locking features 32 taken up, is the upper rail 20 and thus the seating arrangement 12 prevented in relation to the lower rail 18 to move.

With particular reference to the 18 - 25 will be another seat track assembly 110 for use with a seat assembly 112 specified. The seat rail arrangement 110 may be a first rail arrangement 114 and a second rail assembly 116 which cooperate with each other to selectively adjust the front and rear of the seat assembly 112 with respect to an external structure such as a floor panel of a vehicle (not shown). The first rail arrangement 114 and the second rail assembly 116 can be identical both in terms of structure and function. Accordingly, only the first rail arrangement 114 described in detail and shown.

The first rail arrangement 114 can be a bottom rail 118 which is securely fixed to a floor panel of a vehicle (not shown) and an upper rail 120 slidable on the lower rail with respect to the floor panel 118 is included, and a locking mechanism 122 at least partially between the lower rail 118 and the upper rail 120 is arranged. In operation, the locking mechanism 122 a position of the upper rail 120 with respect to the lower rail selectively lock when a locked state is taken, and may be a movement of the upper rail 120 in relation to the lower rail 118 allow, when an unlocked state is taken.

The lower rail 118 may be attached to the floor panel by any suitable method, for example by means of welding and / or riveting, and may include one or more projections 119 have to attach to the lower rail 118 to facilitate the floor panel. The lower rail 118 can be a bottom wall 124 with a sequence of openings 125 and a pair of side walls 126 generally extending from the bottom wall 124 extend out. The bottom wall 124 can with the side walls 126 be integrally formed and can with the side walls 126 interact to form a channel 128 forming substantially along a length of the lower rail 118 extends. The side walls 126 can also have a channel 130 which extends along a length of each side wall 126 extends, and may have a sequence of locking features 132 have, through a series of protrusions 134 are separated.

The locking features 132 may each have a width that is, for example, substantially 5 mm, such that middle portions of adjacent locking features 32 about 10 mm apart from each other ( 25 ). As in 25 shown are adjacent locking features 132 from each other by a projection 134 separated, which may also have a width which is substantially 5 mm. As will be described in greater detail below, any locking feature can 132 a part of the locking mechanism 122 to record in it a movement of the upper rail 120 in Reference to the lower rail 118 to selectively prevent.

As described above, the lower rail takes 118 the upper rail 120 slidable on to a selective movement of the upper rail 120 in relation to the lower rail 118 to allow. Such movement may be through one or more ball cage assemblies 121 be relieved, at least partially within the channels 130 the side walls 126 can be included. The ball cage assemblies 121 can a pair of enclosures 123 have one or more ball bearings 125 ( 21 ), and a support 127 extending between the housings 123 extends and connects them. The ball bearings 125 are inside the housing 123 but can rotate relative to it. Such a rotation of the ball bearings 125 in terms of the housing 123 facilitates movement of the upper rail 120 in relation to the lower rail 118 when the locking mechanism 122 in the unlocked state.

With particular reference to the 19 and 20 is the upper rail 120 shown a ceiling wall 136 and a pair of side walls 138 having. The ceiling wall 136 Can be integral with the side walls 138 be formed, with each of the side walls 138 a channel 140 substantially along a length of the upper rail 120 extends. The ceiling wall 136 can be a sequence of openings 142 comprising a part of the locking mechanism 122 record in it. The side walls 138 can be a series of slots 144 have, in essence, with the openings 142 can be aligned and also part of the locking mechanism 122 can record in it. Finally, the top rail 120 a sequence of receiving openings 133 ( 21 ), which cooperate with fastening elements (not shown) to a part of the seat assembly 112 ( 18 ) on the upper rail 120 to fix. The fasteners may be used to form part of the seat assembly 112 at the top rail 120 to attach it to allow the seating arrangement 112 with the upper rail 120 Can be moved when the top rail 120 in relation to the lower rail 118 is moved.

With particular reference to the 20 - 24 , is the locking mechanism 122 shown, which is a series of pawls 146 , a series of biasing elements 148 and a mounting bracket 150 having. The pawls 146 can be inside the upper rail 120 generally between the ceiling wall 136 and the side walls 138 be included and can have a main body 152 , a pair of locking arms 154 and an actuating arm 156 exhibit. The locking arms 154 and the operating arms 156 Can be integral with the main body 152 ( 21 ) be formed. Alternatively, the actuating arms 156 separate from the main body 152 be formed and can move with the main body 152 be set by a distal end 155 the actuating arm 156 in corresponding openings 157 is introduced in the main body 152 are formed. The distal end 155 from each actuator arm 156 can in the relevant openings 157 be introduced with a press fit and / or may be attached by a suitable method, such as by welding or riveting.

In one embodiment, the biasing elements 148 Coil springs are generally part of each actuator arm 156 enclose and within a bag 158 ( 24 ) of the mounting bracket 150 are included. The pretensioning elements 148 are inside the bag 158 held it to the pretensioner elements 148 to allow a force on each pawl 146 by means of each actuator arm 156 - exercise around each pawl 146 in the in 24 to bias the direction B shown.

The mounting support 150 can be a bottom wall 160 have a ceiling wall 162 and a pair of stop features 164 , The bottom wall 160 Can be on a bottom of the bag 158 can be arranged and can with the biasing elements 148 interact to form each biasing element 148 inside the mounting bracket 150 to hold and position. The ceiling wall 162 can on the ceiling wall 136 the upper rail 120 abut and can on the ceiling wall 136 with a pair of rivets 166 be attached. In particular, the rivets can 166 each within the openings 142 the upper rail 120 be added to the mounting bracket 150 in relation to the upper rail 120 to hold and position.

The stop features 164 can from the bottom wall 160 may be spaced a predetermined distance and may be connected to the bottom wall 160 interact with the bag 158 to define in which the biasing elements 148 are included. The stop features 164 can with the operating arms 156 interact to cause movement of the actuating arms 156 in a direction opposite to the direction W ( 24 ) limit when the biasing elements 148 are compressed ( 22 ).

An actuating mechanism 168 can from the mounting bracket 150 be added to the pawls 146 from a locked state ( 23 ) in an unlocked state ( 22 ) to move. The operating mechanism 168 can be an actuating pin 170 and a tipping arm 172 which cooperate to selectively apply force to the actuating arms 156 to exercise the pawls 146 to move from the locked state to the unlocked state. In the light of the foregoing description, it will be understood that the locking mechanism 122 can be preassembled as a cartridge or module by the mounting bracket 150 at the top rail 120 by means of rivets 166 is attached as described above. A provision of the locking mechanism 122 as a prefabricated cartridge, the manufacture and assembly of the seat track assembly 110 simplify.

The actuating pin 170 can be an attack surface 174 and a slot 176 exhibit. The attack surface 174 can from the ceiling wall 136 of the upper rail 120 protrude when the actuating pin 170 in one of the openings 142 is introduced in the ceiling wall 136 the upper rail 120 are formed. The slot 176 may be a blind slot that extends into the actuating pin 170 extends and a curved inner surface 178 ( 24 ) having. The Kipparm 172 can be pivoted on the actuating pin 170 by means of the slot 176 be attached. In particular, the Kipparm 172 a pivot 180 having, which rotatably on the slot 176 on the curved inner surface 178 is attached. The Kipparm 172 may also be a first extension 182 and a second extension 184 having in contact with corresponding actuating arms 156 the locking mechanism 122 are. As described in more detail below, the first extension 182 and the second extension 184 selectively applying a force to the pawls 146 over the operating arms 156 transferred to the pawls 146 in the unlocked state ( 22 ) to move when a force on the actuating pin 170 at the attack surface 174 is exercised.

With particular reference to the 22 - 25 Now the operation of the seat track assembly 110 described in detail. When the seat track assembly 110 in the locked state is one of the pawls 146 in the locked state, such that the locking arms 154 the pawl 146 within corresponding locking features 132 the lower rail 118 ( 23 ) are included. The locking arms 154 can be in contact with the bottom rail 118 at two points within each locking feature 132 be a relative movement between the lower rail 118 and the upper rail 120 to prevent in two opposite directions. An interaction between each locking arm 154 and the lower rail 118 within each locking feature 132 the lower rail 118 Namely limits relative movement between the lower rail 118 and the upper rail 120 in the direction (S) and in the direction (T), as in 23 shown.

The locking features 132 the lower rail 118 can have a pair of tapered surfaces 186 that cause each locking feature 132 has a decreasing width in a direction (Q) extending from the bottom wall 124 ( 25 ) away. Thus set the locking arms 154 a movement in the locking features 132 Continue until the locking arms 154 in contact with the lower rail 118 in two places within each locking feature 132 on the tapered surfaces 186 ( 23 ) are when the biasing elements 148 a force on the pawls 146 exercise to the locking arms 154 in the locking features 132 to urge.

The pawls 146 are through the biasing elements 148 biased in the locked state and thus in the locking features 132 the lower rail. In particular, the biasing elements 148 inside the bag 158 the mounting bracket 150 picked up and exert a force on each actuator arm 156 out. The exercise of a force on the actuating arms 156 causes the actuator arms 156 likewise a force on the tipping arm 172 at the first extension 182 and at the second extension 184 exercise. If the locking arms 154 the pawls 146 with the locking features 132 the lower rail 118 are aligned, cause the biasing elements 148 that the actuating arms 156 a force on one of the extensions 182 . 184 exercise to the tipping arm 172 around the pivot 180 in relation to the actuating pin 170 to turn. A continued movement of the operating arms 156 in a general way from the bottom wall 124 the lower rail 118 remote direction causes the locking arms 154 in the associated locking features 132 the lower rail 118 Move to a relative movement between the bottom rail 118 and the upper rail 120 to limit.

As in 23 shown is just one of the pawls 146 with the locking features 132 aligned when the locking mechanism 122 is in the locked state. The locking arms 154 the other pawl 146 as such are not with the locking features 132 the lower rail 118 aligned when the locking arms 154 from one of the pawls 146 within the locking features 132 are included, however, are with the projections 134 the lower rail 118 aligned and in contact. As a result, only one of the pawls 146 in the locked state, so that the locking arms 154 within the locking features 132 are included when the locking mechanism 122 in the locked state.

The locking mechanism 122 can from the locked state ( 23 ) in the unlocked state ( 22 ) are moved when a force is applied to the actuating pin 170 at the attack surface 174 is exercised. The on the actuating pin 170 applied force can be generated by an actuator assembly (not shown), similar to the actuator assembly 84 in connection with the seat track assembly 10 according to 1 , Such an actuator assembly can with respect to the upper rail by means of a mounting bracket 188 ( 19 ) to allow the actuator assembly to selectively apply force to the actuator pin 170 exercise.

Regardless of the particular configuration of the actuator assembly, the actuator pin moves 170 then, if a force on the actuating pin 170 at the attack surface 174 in the in 22 direction shown, to the ceiling wall 136 the upper rail 120 , and as a result, cause the slot 176 , also in the mounting bracket 150 to move. A movement of the slot 176 continue in the mounting bracket 150 in relation to the upper rail 120 causes the curved inner surface 178 of the slot 176 a force on the pivot pin 180 exerts to the pivot pin 180 with the actuating pin 170 to move. A movement of the pivot 180 with the actuating pin 170 in the in 22 also causes direction that the Kipparm 172 with the actuating pin 170 emotional.

A movement of the pivot 180 causes the Kipparm 172 also continue in the mounting bracket 150 moves, which causes the first extension 182 and the second extension 184 a force on the respective actuating arms 156 the locking mechanism 122 exercise. The force is applied to the actuating arms 156 by means of the first extension 182 and the second extension 184 of the tipper body 172 exerted and causes the actuating arms 156 the biasing elements 148 within the respective pockets 158 the mounting bracket 150 compress. In this way, the Kipparm causes 172 in that the locking arms 154 the pawls 146 from the locking features 132 the lower rail 118 to solve. When the locking arms 154 the pawls 146 different from the relevant locking features 132 the lower rail 118 is a relative movement between the lower rail 118 and the upper rail 120 allows. As such, a force on the seat assembly 112 be exercised to a position of the seating arrangement 112 in relation to the lower rail 118 adjust by the seating arrangement 112 along with the upper rail 120 in relation to the lower rail 118 is moved.

Has the seating arrangement 112 once a desired position and thus a desired position of the upper rail 120 in relation to the lower rail 118 taken, the can on the actuating pin 170 applied force eliminated. When the on the actuating pin 170 exerted force is eliminated, practice the biasing elements 148 again a force on the operating arms 156 out, and thereby cause the operating arms 156 also a force on the first extension 182 and the second extension 184 of the tipper body 172 exercise. If the pawls 146 in terms of locking features 132 are positioned and the projections 134 the lower rail 118 are arranged such that each locking arm 154 a lead 134 opposite, cause the biasing elements 148 in that the locking arms 154 at the projections 134 attack, causing the locking arms 154 are prevented, within the locking features 132 to be grounded and the locking mechanism 122 to move into the locked state.

At this point, a force can be applied to the upper rail 120 over the seating arrangement 112 be exercised to the upper rail 120 in relation to the lower rail 118 to move. A movement of the upper rail 120 in relation to the lower rail 118 causes the locking arms 154 the pawls 146 along the projections 134 move until one of the pawls 146 suitably with the locking features 132 is aligned so that the locking arms 154 from one of the pawls 146 within the respective locking features 132 the lower rail 118 can be included.

If the top rail 120 sufficient in relation to the lower rail 118 is moved, leaving one of the pawls 146 with the locking features 132 is aligned, rotate the biasing elements 148 the tilting arm 172 in relation to the actuating pin 170 around the pivot 180 , causing a movement of the actuating arms 156 towards the ceiling wall 136 or upper rail 120 is effected. This is also one of the pawls 146 towards the ceiling wall 136 the upper rail 120 moves, which causes the locking arms 154 at the locking features 132 the lower rail 118 attack, causing the locking mechanism 122 returns to the locked state.

As in 25 shown is a movement of the upper rail 120 in relation to the lower rail 118 limited to approximately five millimeters (5mm) if the locking arms 154 from both of the pawls 146 initially at the projections 134 attack so that the upper rail 120 in relation to the lower rail 118 must be moved to allow it, that at least one of the pawls 146 with the locking features 132 is aligned. In particular, the movement of the upper rail 120 in one direction (S) or in the other direction (T; 23 ) is limited to approximately five millimeters (5 mm) until one of the pawls 146 at the locking features 132 the lower rail 118 attacks as the distance between the center of the adjacent locking features 132 is about ten millimeters (10 mm). Once is one of the pawls 146 from the locking features 132 the lower rail 118 recorded, cause the biasing members 148 - over the operating arms 156 - that the locking arms 154 in the locking features 132 move and at the bottom rail 118 in two places within the locking feature 132 attack, due to the tapered surfaces 186 from each locking feature 132 , If one of the pawls 146 in the locked state, so that the locking arms 154 in contact with the lower rail 118 in two places within each locking feature 132 are, the locking mechanism 122 returned to the locked state and a relative movement between the upper rail 120 and the lower rail 118 is prevented in the direction (S) and the direction (T).

As in 21 shown, can any pawl 146 six (6) locking arms 154 exhibit. Every pawl 146 can namely three locking arms 154 on one side of the pawl 146 and can also three locking arms 154 on the other side of the pawl 146 exhibit. When the locking arms 154 are in the locked state and within locking features, respectively 132 the lower rail 118 As such, these are a total of six (6) locking arms 154 engaged with the locking features 132 the lower rail 118 while a total of six (6) locking arms 154 the other pawls 146 in contact with the projections 134 the lower rail 118 are. Although the pawls 146 are described and illustrated in that they each have six (6) locking arms 154 can have the pawls 146 a different number of locking arms 154 exhibit. For example, any pawl 146 four (4) locking arms 154 or alternatively eight (8) locking arms 154 ,

Regardless of the special design of the pawls 146 is every locking arm 154 from one of the pawls 146 then when the locking mechanism 122 in the locked state, within an associated lock feature 132 the lower rail 118 taken while the locking arms 154 the other pawl 146 in contact with the projections 134 are, and therefore not within the locking features 132 the lower rail 118 are included. In short, only one of the pawls 146 locking arms 154 which are inside the locking features 132 the lower rail 118 are included when the locking mechanism 122 in the locked state is relative movement between the upper rail 120 and the lower rail 118 to limit.

With reference to the 26 - 28 becomes another locking mechanism 222 indicated in the seat track assembly 110 instead of the locking mechanism 122 could be integrated. The structure and function of the locking mechanism 222 may be similar or identical to that of the locking mechanism described above 122 with the exception of certain exceptions described below and / or shown in the figures. Therefore, similar features and functions will not be described again in detail.

Like the locking mechanism 122 can the locking mechanism 222 a series of pawls 246 comprising a series of biasing elements 248 , a mounting bracket or a housing 250 , as well as an actuating mechanism 268 , As described above, the locking mechanism 222 be preassembled as a cartridge or module by the mounting bracket 250 the upper rail 120 with screw fasteners 266 is attached. A provision of the locking mechanism 222 as a preassembled cartridge, the manufacture and assembly of the seat track assembly 110 simplify. The mounting support 250 can also have one or more tabs 267 which face up from a ceiling wall 262 the mounting bracket 250 protrude. The tabs 267 can pass through openings 269 in the upper rail 120 extend and can be an orientation of the mounting bracket 250 in relation to the upper rail 120 during assembly of the locking mechanism 222 in the seat track assembly 110 facilitate. In some designs, the tabs 267 in engagement with the openings 269 be clipped to the locking mechanism 22 to hold in place until the fasteners 266 can be installed to the locking mechanism 222 safer on the upper rail 120 set.

With reference to the 29 - 33 now becomes another locking mechanism 322 indicated in a seat track assembly 310 could be integrated. The structure and function of the seat track assembly 310 and the locking mechanism 322 may be similar or identical to that of the seat track assembly 110 and the locking mechanism 122 As described above, with the exception of some exceptions described below and / or shown in the figures. Therefore, similar features and functions will not be described again in detail.

The seat rail arrangement 310 can be a lower seat rail 318 and an upper seat rail 320 which are similar or identical to those of the lower and upper rails 118 . 120 , as can be described above. Like the locking mechanism 122 can the locking mechanism 322 a series of pawls 346 , a series of biasing elements 348 , a mounting bracket or a housing 350 and an actuator 368 exhibit.

The mounting support 350 can a body 351 having a cavity 353 defined, as well as a pair of mounting holes 355 and tabs 367 , The cavity 353 can be a plurality of bags 358 (similar to the bags 158 ), which (via slots 359 ) communicate with each other and move axially through the body 351 extend. The tabs 367 can from a ceiling wall 362 can protrude and pass through openings 369 in the upper rail 320 extend. As described above, the locking mechanism 322 be preassembled as a cartridge or module by the mounting bracket 350 with the rail 320 by means of threaded fasteners 366 is attached.

In the in the 29 - 33 The configuration shown has the locking mechanism 322 three pawls 346 that are movable independently of each other. Each of the pawls 346 can be a main body 352 , a pair of locking arms 354 (Locking elements) and an actuating arm 356 exhibit. Distal ends of the actuator arm 356 can be in associated openings in the main body 352 are formed, be pressed (or otherwise fixed). In some configurations, the main body could 352 , the locking arm 354 and the actuating arm 356 be integrally formed as a total body. Every main body 352 can have a single locking arm 354 which extends from each opposite end of the main body 342 extends out.

The pretensioning elements 348 can be coil springs, which are part of the actuator arms 356 enclose and inside the pockets 358 the mounting bracket 350 are included. The pretensioning elements 348 are inside the bags 358 added to allow it, that the biasing elements 348 Forces on the pawls 346 (by means of each actuator arm 356 ) to the pawls 346 to bias toward a locked state.

The actuator 368 can be an elongated strut 370 and a pen 371 exhibit. The elongated strut 370 can be inside the cavity 353 the mounting bracket 350 be arranged and can be movable in order to apply a force to the pawls 346 from the locked state (ie, the upper position) toward the unlocked state (ie, the lower position). The elongated strut 370 can be in a direction parallel to the longitudinal axis of the rails 318 . 320 (ie the direction in which the upper rail 320 in relation to the lower rail 318 is mobile) can be extended. The pencil 371 may be from the elongated strut 370 in a direction perpendicular to the longitudinal axes of the rails 318 . 320 extend and can through an opening 373 in the upper rail 320 protrude.

As in the 31 - 33 shown points the lower rail 318 a plurality of locking features 332 (similar to the locking features 132 ) by protrusions 334 are separated from each other. The locking features 332 may be slots each having a width W1 that is at least two times greater than a width W2 of each locking arm 354 is. A width W3 of the projections 334 between adjacent locking features 332 For example, it may be twice as large as the width W1. In some embodiments, the width W3 may be less than twice the width W1. The size of the locking arms 354 and the distance between the locking arms 354 as well as the size of the locking features 332 and the distance between the locking features 332 is such that when the upper rail 320 in both directions (forward and backward) with respect to the lower rail 318 is fixed, the locking arms 354 a first of the pawls 346 a front end surface 381 from one of the locking features 332 contacted, the locking arms 354 from a second of the pawls 346 a rear end surface 383 from another of the locking features 332 contacted, and the locking arms 354 from a third of the pawls 346 will not be in any of the locking features 332 added. The locking mechanism 322 is a positive engagement locking mechanism (PEL). That is, at least one of the pawls 346 is in the locking features 332 in the lower rail 318 after release of the actuator 368 regardless of the position of the upper rail 320 in relation to the lower rail 318 added. A second of the pawls 346 gets into another locking feature 332 in response to movement of the upper rail 320 over a distance (in any direction) that is no greater than half the locking increment (ie, half the distance between adjacent locked positions of the upper rail) 320 ).

Referring now to the 34 - 38 is another locking mechanism 422 indicated in a seat track assembly 410 could be integrated. The structure and function of the seat track assembly 410 and the locking mechanism 422 may be similar or identical to that of the seat track assembly 310 and the locking mechanism 322 As described above, except for any exceptions described below and / or shown in the figures. Therefore, similar features and functions will not be described again in detail.

The seat rail arrangement 410 can be a bottom rail 418 and an upper rail 420 which correspond to the lower and upper rails described above 318 . 320 may be similar or identical. Like the locking mechanism 322 can the locking mechanism 422 a series of pawls 446 , a series of biasing elements 448 , a mounting bracket or a housing 450 and an actuator 468 exhibit.

The mounting support 450 can a body 451 having a cavity 453 defines a pair of receiving openings 455 and tabs 467 , The cavity 453 can be a plurality of bags 458 which are interconnected and extending axially through the body 451 extend. The tabs 467 can be from a ceiling wall 462 can extend out and through openings 469 in the upper rail 420 extend. As described above, the locking mechanism 422 be preassembled as a cartridge or module by the mounting bracket 450 the upper rail 420 with threaded fasteners 466 is attached.

In the in the 34 - 38 shown embodiment, the locking mechanism 422 three pawls 446 on, which are independently movable. Each of the pawls 446 can be a main body 452 have a plurality of locking arms 454 (Locking elements), as well as an actuating arm 456 , Distal ends of the actuator arm 456 can be in associated openings in the main bodies 452 are formed, pressed (or otherwise fixed in it). In some embodiments, the main body could 452 , the locking arm 454 and the actuating arm 456 be integrally formed as a total body. In the configuration shown, the main body 452 a pair of locking arms 454 on, extending from each opposite end of the main body 452 extend.

The pretensioning elements 448 may be coil springs, which are part of the actuator arms 456 surrounded and within the pockets 458 the mounting bracket 450 are included. The pretensioning elements 448 are inside the bags 458 added to allow it, that the biasing elements 448 Forces on the pawls 446 (by means of each actuator arm 456 ) to the pawls 446 to bias upward toward a locked condition.

The actuator 468 can be an elongated strut 470 and a pen 471 exhibit. The elongated strut 470 can be inside the cavity 453 the mounting bracket 450 be arranged and can be movable in the pawls 446 from the locked state (ie, the upper position) toward the unlocked state (ie, the lower position). The elongated strut 470 may be in a direction parallel to the longitudinal axes of the rails 418 . 420 extend. The pencil 471 may be from the elongated strut 470 in a direction perpendicular to the longitudinal axes of the rails 418 . 420 extend and can through an opening 473 in the upper rail 420 protrude.

As in the 36 - 38 shown, the bottom rail closes 418 a plurality of locking features 432 (similar to the locking features 332 ) by protrusions 434 are separated from each other. The locking features 432 may be slots each having a width W1 that is at least two times greater than a width W2 of each locking arm 454 is. A width W3 of the projections 434 between adjacent locking features 432 may be about twice larger than, for example, the width W1. In some embodiments, the width W3 is less than twice the width W1. The size of the locking arms 454 and the distance between the locking arms 454 , as well as the size of the locking features 432 and the distance between the locking features 432 is such that the upper rail 420 in both directions (forward and backward) with respect to the lower rail 418 fixed is that the locking arms 454 from a first of the pawls 446 a front end surface 481 from one of the locking features 432 Contact that locking arms 454 from a second of the pawls 446 a back end 483 from another of the locking features 432 contact, and that the locking arms 454 from a third of the pawls 446 not in any of the locking features 432 be recorded. In some designs, the front end face 481 and the rear end surface 483 be formed tapered.

The locking arms 454 in contact with the front end faces 481 can absorb an impact load associated with a forward impact of a vehicle in which the seat track assembly 410 is arranged. The locking arms 454 in contact with the rear end faces 483 can absorb an impact load associated with a rear impact of the vehicle.

The locking mechanism 422 is a positive engagement locking mechanism (PEL). That is, at least one of the pawls 446 gets inside the locking features 432 in the lower rail 418 after a release of the actuator 468 be included, regardless of the position of the upper rail 420 in relation to the lower rail 418 , A second of the pawls 446 will be at another interlocking feature 432 in response to movement of the upper rail 420 over a distance (in any direction) of not more than half of the locking increment (ie, half the distance between adjacent locked positions of the upper rail) 420 ) engage.

Referring now to the 39 - 41 becomes another locking mechanism 522 indicated in a seat track assembly 510 could be integrated. The structure and function of the seat track assembly 510 and the locking mechanism 522 may be similar or identical to that of the seat track assembly 310 and the locking mechanism 322 as described above, except for certain exceptions described below and / or shown in the figures. Therefore, similar features and functions will not be described again in detail.

The seat rail arrangement 510 can lower and upper rails 518 . 520 have, leading to the lower and upper rails 118 . 120 as described above, may be similar or identical. The locking mechanism 522 can be a first pawl 546 , a second pawl 547 , a plurality of biasing elements 548 and a mounting bracket or housing 550 exhibit. The mounting support 550 can be generally similar to the mounting posts 350 . 450 be.

The first and second pawls 546 . 547 can each have a main body 552 , a plurality of locking arms 554 (Locking elements), as well as an actuating arm 556 exhibit. Distal ends of the actuator arm 556 can be assigned in openings that are in the main bodies 552 are formed, pressed (or otherwise fixed in it). In some embodiments, the main body could 552 , the locking arm 554 and the actuating arm 556 be integrally formed as a total body. The main body 552 the first pawl 546 may be a plurality of locking arms 554 which extend from each opposite end of the main body 552 extend. The main body 552 the second pawl 547 can have a single locking arm 554 which extends from each opposite end of the main body 542 extends out.

The pretensioning elements 548 may be coil springs, which are part of the actuator arms 556 enclose and within pockets 558 in the mounting bracket 550 are included. The pretensioning elements 548 are inside the bags 558 added to allow it, that the biasing elements 548 Forces on the pawls 546 . 547 (by means of each actuator arm 556 ) to the pawls 546 . 547 to bias in a locked state.

The actuating arm 556 the first pawl 546 can be an actuator 568 have, which is integrally formed therewith or attached thereto. The actuator 568 can be an elongated strut 570 have, which are parallel to the longitudinal axes of the rails 518 . 520 extends. A pen 571 may be from the elongated strut 570 upward in a direction perpendicular to the longitudinal axes of the rails 518 . 520 extend. As described above, the pen 571 through an opening in the upper rail 520 extend. If the actuator 568 is moved downwards (in terms of in 40 drawn position), both pawls can 546 . 547 simultaneously pushed down to the unlocked state.

As in 41 is shown have the locking arms 554 the first pawl 546 each a first width W1 less than a second width W2 of each of the lock arms 554 the second pawl 547 is. As described above, the locking arms 554 the pawls 546 . 547 in the locking features (eg slots) 532 be included in the lower rail 518 are formed. The front and back end surfaces 581 . 583 the locking features 532 may have inclined portions that are inclined to each other so that the width of the locking feature 532 with the distance from the opening of the locking feature 532 increases.

The narrowest area of each locking feature 532 is still greater than the first width W1 of the locking arm 554 the first pawl 546 , The width of the narrowest area of each locking feature 532 may be equal to or less than the second width W2 of the locking arms 554 the second pawl 547 be. In this way, the locking arm 554 the second pawl 547 at the same time the front and rear end surfaces 581 . 583 of the locking feature 532 in which he is included. This simultaneous contact with the front and back end surfaces 581 . 583 will any "slip" or any "play" between the lower and upper rail 518 . 520 eliminate when the locking mechanism 522 in the locked state. When the locking arms 554 the first pawl 546 in the associated locking features 532 are absorbed, they are able to absorb a large amount of energy that occurs with an accident or a sudden, extreme deceleration of the vehicle, wherein the seat track assembly 510 is installed.

Referring now to the 42 - 46 becomes another locking mechanism 622 indicated in a seat track assembly 610 could be integrated. The structure and function of the seat track assembly 610 and the locking mechanism 622 may be similar or identical to that of the seat track assembly 410 and the locking mechanism 422 As described above, except for certain exceptions described below and / or shown in the figures. Therefore, similar features and functions will not be described again in detail.

The seat rail arrangement 610 can be a bottom rail 618 and an upper rail 620 have, leading to the lower and upper rail 418 . 420 may be similar or identical as described above. The locking mechanism 622 can be a first pawl 646 , a second pawl 647 , a third pawl 649 , a series of biasing elements 648 , a mounting bracket 650 and an actuator 668 exhibit. The pretensioning elements 648 , the mounting bracket 650 and the actuator 668 may be similar or identical to the biasing elements 448 , the mounting post 450 and the actuator 468 be as described above. Furthermore, the first and the third pawl 646 . 649 similar or identical to the pawls described above 446 be.

Like the pawls 446 can be the first and third pawl 646 . 649 each a pair of locking arms 654 at both ends of the main body 652 from each pawl 646 . 649 (ie, each pawl 646 . 649 can have a total of four locking arms 654 exhibit). The second pawl 647 can only have a single locking arm 654 at each end of the main body 652 (ie, a total of two latch arms 654 on the second pawl 647 ).

In the in 44 shown position are the first and third pawl 646 . 649 in the locked state and the second pawl 647 is in the unlocked state. During a frontal impact, the first pawl may 646 absorb a large amount of energy and the upper rail 620 in relation to the lower rail 618 keep stationary. During a rear impact, the third pawl may 649 to absorb a large amount of energy and the upper rail 620 in relation to the lower rail 618 keep stationary.

In the in 45 shown position are the second and third pawl 647 . 649 in the locked state and the first pawl 646 is in the unlocked state. During a frontal impact, the third pawl may 649 absorb a large amount of energy and the upper rail 620 in relation to the lower rail 618 keep stationary. During a rear impact, the second pawl may 647 bend while absorbing impact energy and it's upper rail 620 allowed to move backwards in relation to the lower rail 618 to move until the first pawl 646 gets into the locked state. After that, the first pawl 646 absorb any remaining impact energy and the upper rail 620 in relation to the lower rail 618 keep stationary.

In the in 46 shown position are the first and the second pawl 646 . 647 in the locked state and the third pawl 649 is in the unlocked state. During a rear impact, the first pawl may 646 absorb a large amount of energy and the upper rail 620 in relation to the lower rail 618 keep stationary. During a frontal impact, the second pawl may 647 bend while absorbing impact energy and it's upper rail 620 allowed to lean forward towards the lower rail 618 to move until the third pawl 649 can move to the locked state. After that, the third pawl 649 absorb any remaining impact energy and the upper rail 620 stationary with respect to the lower rail 618 hold.

The foregoing description of embodiments has been made for the purposes of explanation and description. It is not intended to be exhaustive or to limit the disclosure. Particular elements or features of particular embodiments are not generally limited to the particular embodiment, but are interchangeable, as appropriate, and may be used in a selected embodiment, even if not specifically shown or described. The same can be changed in many ways. Such changes are not to be understood as a departure from the disclosure, and all such modifications are to be regarded as within the scope of the disclosure.

Claims (21)

A seat track assembly comprising: a first track member having a series of locking features; a second rail member slidably received on the first rail member; and a locking mechanism at least partially between the first Rail member and the second rail member is arranged and having a first, a second and a third pawl, which is independently between a locked state in engagement with the locking features for limiting relative movement between the first rail member and the second rail member and solved an unlocked state of the locking features is to allow relative movement between the first rail member and the second rail member, wherein each of the first, second and third pawls has a locking member which is within an associated locking feature of the sequence of locking features in the unlocked state the locking features each have a width that is at least twice the width of each of the locking elements, such that the locking elements of two of the first, second and third locking pawls simultaneously engage Limit relative movement between the first rail member and the second rail member in two directions when the two of the pawls are in the locked state, wherein at least one of the pawls is in the unlocked state at any time. The seat track assembly of claim 1, wherein a plurality of locking members extend from opposite ends of each of the pawls and are received in associated latching features when the pawls are in the locked condition. The seat track assembly of claim 1, wherein only a single locking element extends from each end of each pawl. The seat track assembly of claim 1, further comprising an actuator adapted to selectively apply a force to any two of the first, second and third pawls to hold the two of the pawls in the unlocked state. The seat track assembly of claim 4 wherein at least one of the pawls is in the unlocked state following release of the force independent of positioning of the second rail member with respect to the first rail member. The seat track assembly of claim 5, wherein relative movement between the first rail member and the second rail member is limited to one-half the width of one of the locking features following release of the force before the locking members of the two of the pawls are received in associated ones of the locking features are. The seat track assembly of claim 6, wherein the actuator comprises an elongated strut extending parallel to the longitudinal axes of the first and second rail members, and wherein the elongate strut encloses a pin perpendicular to the longitudinal axes and through an opening in the second Rail element extends. The seat track assembly of claim 7, wherein the elongate strut selectively exerts a force on the pawls to hold the pawls in the unlocked state. The seat track assembly of claim 8, further comprising a housing attached to the second rail member and disposed between the first and second rail members, the housing defining a cavity in which the elongated strut is movably received, each of the pawls having a An actuating arm which extends into the cavity and which reciprocates therein when the pawls move between the locked and the unlocked state. A seat track assembly with: a first rail member having a series of locking features; a second rail member slidably received on the first rail member; and with a latching mechanism at least partially received between the first rail member and the second rail member and having first and second pawls that are independently locked in engagement with the latching features to provide relative movement between the first rail member and the second rail member, and are movable in an unlocked state in which a release of the locking features, to allow relative movement between the first rail member and the second rail member, each of the pawls locking elements, which within an associated from the A series of locking features is received in the locked state, wherein the first pawl has a plurality of locking elements extending from opposite ends of the first pawl, wherein the second pawl n ur a single locking element which extends from each end of the second pawl. The seat track assembly of claim 10, wherein the locking features each have a width that is greater than a width of one of the locking elements of the first pawl and that are substantially equal to a width of one of the locking elements and the second locking pawl. The seat track assembly of claim 10, further comprising a third pawl that is movable independently of the first and second pawls between the locked and unlocked states. The seat track assembly of claim 12, wherein the second pawl is received between the first and third pawls. The seat track assembly of claim 13, further comprising an actuator operable to selectively apply force to any two of the first, second and third pawls to hold the two of the pawls in the unlocked state. The seat track assembly of claim 14, wherein at least one of the pawls is in the locked state following release of the force independent of the positioning of the second rail member with respect to the first rail member. The seat track assembly of claim 15, wherein relative movement between the first rail member and the second rail member is limited to half the width of one of the locking features following release of the force prior to the locking members of two of the pawls being received within associated latching features are. The seat track assembly of claim 10, further comprising an actuator operable to selectively apply a force to the pawls to hold the pawls in the unlocked state. The seat track assembly of claim 17, wherein the actuator comprises an elongated strut extending parallel to the longitudinal axes of the first and second rail members, and wherein the elongate strut comprises a pin extending perpendicular to the longitudinal axes and through an opening in the second Rail element extends. The seat track assembly of claim 18, further comprising a housing secured to the second rail member and disposed between the first and second rail members, the housing defining a cavity in which the elongate strut is movably received. The seat track assembly of claim 19, wherein each of the pawls includes an actuating arm that extends into the cavity and reciprocates therein as the pawls move between the locked and unlocked states. The seat track assembly of claim 10, wherein the first rail member and the second rail member are movable in two opposite directions with respect to each other along an axis when the locking mechanism is in the unlocked state.

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