Adjustment accessory for vehicle seat and vehicle seat

Abstract

The invention relates to an adjustment fitting (100) for a vehicle seat, comprising a first fitting part (110) and at least one second fitting part (120), the second fitting part (120) being rotatable relative to the first fitting part (110) about a rotation axis (A), the adjustment fitting (100) further comprising at least one latch (130) for locking the first fitting part (110) to the second fitting part (120), wherein the adjustment fitting (100) comprises an input disc (140) connectable to a drive (141) and a positioning disc (170) frictionally connected to the input disc (140), and the positioning disc (170) holds the at least one latch (130) in an unlocked position when the drive (141) is activated.

Description

Technical Field

[0001] The invention relates to an adjustment accessory for a vehicle seat, and a vehicle seat. Background Art

[0002] DE 103 56 614 A1 discloses a seat with a seat part and a backrest, wherein the backrest can be rotated from a first position to a second position relative to the seat part and can be unlocked and locked in at least one position relative to the seat part. The seat also includes a motor, and the unlocking of the backrest relative to the seat part and the rotation of the backrest from the first position to the second position are both achieved by the motor.

[0003] DE 10 2006 020 751 A1 discloses an adjustment fitting for a vehicle seat, wherein the adjustment fitting comprises a first fitting part and a second fitting part, wherein relative rotational adjustability about a rotation axis is provided by gears, wherein the gears comprise a first set of teeth on the first fitting part, and a second set of teeth on the second fitting part, which is arranged eccentrically relative to the first set of teeth, and two wedge-shaped segments are provided to ensure the eccentric arrangement of the first set of teeth relative to the second set of teeth. The wedge-shaped segments have an inner radius and an outer radius, and the adjustment fitting comprises a brake element having a radial extension, starting from the rotation axis, which approximately corresponds to the outer radius of the wedge-shaped segments.

[0004] The vehicle seat known from DE 10 2007 017 672 A1 comprises a first seat part, a second seat part that is adjustable relative to the first seat part, an electric motor for adjusting the two seat parts relative to each other by means of an electric motor, and a locking device for locking the seat parts relative to each other. The locking device is designed to be unlocked by a first partial movement of the electric motor, and the seat parts can be adjusted relative to each other by a subsequent second partial movement of the electric motor, the electric motor rotating the adjustment device mounted on the first seat part, thereby generating a relative rotation between the adjustment device and the electric motor. During the first partial movement of the electric motor, the electric motor rotates about a common rotation axis, thereby unlocking the locking device. During the second partial movement, the electric motor is stationary and the adjustment device adjusts the second seat part.

[0005] DE 10 2009 038 735 A1 discloses an adjustment device for a vehicle component, in particular for a backrest of a vehicle seat, comprising a first fitting part and a second fitting part arranged along a rotational axis. The relative position of the two fitting parts relative to each other is variable via an eccentric element. The eccentric element transmits a torque from a driver to the first fitting part, causing the second fitting part to roll on the second fitting part. The eccentric element comprises two eccentrics, which can be driven by a drive element arranged on the driver. The eccentric element includes a spring element acting between the two eccentrics. A brake device prevents the adjustment device from self-adjusting. The brake device cooperates with a projection on the first fitting part, whose center axis extends parallel to the rotational axis of the device.

[0006] WO 2012 / 065721 A1 discloses an adjustment device for a vehicle component, comprising a first fitting part and a second fitting part arranged along a rotational axis, wherein the relative position of the two fitting parts relative to one another is variable via an eccentric, which transmits a torque from a drive to a gear wheel so that the latter rolls on the second fitting part, and wherein the eccentric preferably comprises two eccentrics, and wherein the adjustment device has a braking device which at least largely prevents its self-adjustment, and which interacts with a locking contour provided on the gear wheel.

[0007] Adjustment accessories for vehicle seats, particularly backrest adjusters, are known in the prior art. These backrest adjusters are developed and optimized to adjust the backrest angle within a relatively narrow, comfortable adjustment range near the design position. As the installation space between the vehicle seat and the B-pillar in newer vehicles is becoming increasingly smaller, making it difficult to access the handwheel to operate the backrest adjuster, the increasingly common electric adjustment function is designed to be adjusted by the operator by operating a corresponding electric switch. The adjustment speed must be kept low enough to allow the seat occupant to adjust the desired backrest angle based on their current reaction speed without having to adjust the backrest angle back and forth multiple times.

[0008] In view of the ever-increasing demands for comfort, the backrests of rear seat systems are also increasingly electrified. In addition to displaying a greater load capacity, they can also be adjusted fully forwards or backwards, preferably electrically via remote control or mobile phone app, and at a significantly faster speed than in the purely comfort setting.

[0009] The parallel development of autonomous vehicles also requires an expansion of the adjustment range of vehicle seats used by the driver as an occupant, in order to provide comfort even for drivers who are no longer actively behind the wheel. While also ensuring the safety of the occupants in the event of an accident, this means that the seat belt must fully follow the movement of the seat, remaining close to the occupant even when the seat or backrest is positioned far to the rear. Consequently, this type of seat belt system, in which the shoulder belt is no longer fastened to the B-pillar of the vehicle body but to the upper area of the backrest, results in a significantly increased load on the backrest adjuster (adjustment fitting), which therefore requires more installation space and weighs more than prior art backrest adjusters with the same basic mechanical principle. Summary of the Invention

[0010] The object of the present invention is to provide an adjustment fitting for high loads and a corresponding vehicle seat.

[0011] This object is achieved by an adjustment fitting and a vehicle seat having the following features.

[0012] The adjustment accessory comprises at least one first accessory part, a second accessory part rotatable relative to the first accessory part about a rotation axis, and at least one latch, the first accessory part being in particular connectable to a seat substructure of a vehicle seat, the second accessory part being in particular connectable to a backrest of the vehicle seat, the latch being in particular radially guided in one of the two accessory parts for locking the first accessory part to the second accessory part, the adjustment accessory having an input disc connectable to a drive and a positioning disc connectable to the input disc by friction, the positioning disc holding the at least one latch in an unlocked position when the drive is activated.

[0013] The adjustment fitting has an input disc connectable to the actuator and a positioning disc frictionally connected to the input disc, the positioning disc holding the at least one latch in an unlocked position when the actuator is activated, the adjustment fitting remaining in the unlocked position as long as the actuator adjusts the first and second fitting parts relative to each other.

[0014] In the activated state of the drive, the drive disc or drive pulley can act on the at least one latch in the circumferential direction so that the second fitting part rotates relative to the first fitting part. Optionally, the drive disc can at least indirectly drive the sun gear of the adjustment fitting.

[0015] In the activated state of the actuator, the spring device or spring assembly acting between the input disc and the control disc may also be preloaded. Furthermore, in the deactivated state of the actuator, the spring device relaxes or is less preloaded than in the activated state of the actuator. The energy stored in the spring device can be used to relock the adjustment accessory.

[0016] In a vehicle seat, the backrest and the adjustment fitting can be driven in two rotational directions. Preferably, the second fitting part can be selectively driven in two opposite rotational directions relative to the first fitting part. The number of control cams, positioning cams, and drive cams is at least, and in particular, twice, the number of latches. In particular, a portion or part of the control cams, positioning cams, and drive cams is active in the first rotational direction, while another portion or part of the control cams, positioning cams, and drive cams is active in the second rotational direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Before describing the present invention in more detail based on the following examples, it should be noted that the present invention is not limited to the described components or process steps. Furthermore, the terminology used is not intended to be limiting but rather illustrative. Where the singular is used in the specification and claims, the plural is intended to be included unless the context clearly excludes it.

[0018] Hereinafter, the present invention will be explained in more detail with reference to the embodiments shown in the accompanying drawings. However, the present invention is not limited to these embodiments. They show:

[0019] Figure 1 is a schematic diagram of an adjustment fitting according to a first embodiment, showing a locked state and a first angular position of the first fitting part relative to the second fitting part,

[0020] Figure 2 yes Figure 1 Detailed view of

[0021] Figure 3 yes Figure 2 Schematic diagram of the adjustment accessory during actuation of the adjustment accessory, with its positioning stud about to contact the latch cam of the latch,

[0022] Figure 4 yes Figure 2 Schematic diagram of the adjustment accessory during actuation of the adjustment accessory, with its positioning stud in contact with the latch cam,

[0023] Figure 5 yes Figure 2 Schematic diagram of the adjusting accessory during the actuation process of the adjusting accessory, wherein the latch moves radially inwards so that the adjusting accessory enters the unlocked state,

[0024] Figure 6 yes Figure 5 Detailed view of

[0025] Figure 6A The cam of the latch of the adjustment fitting is similar to the cam of the adjustment fitting according to the modification of the first embodiment. Figure 6 Detailed view of

[0026] Figure 7 yes Figure 2 showing an unlocked state and a second angular position of the first fitting part relative to the second fitting part,

[0027] Figure 8 yes Figure 2 showing a locked state and a second angular position of the first fitting part relative to the second fitting part,

[0028] Figure 9 is a partial perspective view of an adjustment fitting according to a second embodiment of the present invention, and

[0029] Figure 10 yes Figure 9 An exploded view of the parts of the adjustment fitting shown, showing only one gear and one latch. DETAILED DESCRIPTION

[0030] The vehicle seat (not shown) of a motor vehicle according to the invention comprises a seat portion and a backrest whose inclination can be adjusted relative to the seat portion. The backrest is connected to the seat portion in an inclination-adjustable manner via at least one adjustment fitting 100, 200 according to the invention.

[0031] Figures 1 to 8 An adjustment fitting 100 according to a first embodiment is shown. The adjustment fitting 100 has a first fitting part 110 and a second fitting part 120, which are rotatable relative to one another about an axis of rotation A. The adjustment fitting 100 also includes a retaining lock by means of a plurality of latches 130, similar to the retaining fitting described in DE 10 2006 015 560 B3. Unless otherwise specified below, the directional indicators "radial," "axial," and "circumferential" or "circumferential direction" used below refer to the axis of rotation A.

[0032] The two fitting parts 110, 120 can each be approximately disc-shaped. Both fitting parts 110, 120 are preferably made of metal, in particular steel, which can be hardened at least in certain areas. To absorb axial forces, i.e., to axially cohere the fitting parts 110, 120, a clamping collar (not shown) can be provided. The clamping collar can have a substantially flat annular shape, but in alternative embodiments can have an L-shaped profile with a cylindrical section and a flat annular section on the end face.

[0033] For example, the first fitting part 110 can be fixedly connected to the structure of the backrest of the vehicle seat. The second fitting part 120 can then be firmly connected to the structure of the seat part of the vehicle seat. However, the configuration of the fitting parts 110, 120 can also be interchanged, i.e. the first fitting part 110 can be connected to the seat part alternatively, while the second fitting part 120 can be connected to the backrest alternatively. Alternatively, one of the two fitting parts 110, 120 can be connected to another fitting or planetary gear or integrated into another adjustment fitting, in particular for driving a planetary gear. The adjustment fitting 100 installed in the vehicle seat is located in the power flow between the backrest and the seat part of the vehicle seat and must have a correspondingly strong and rigid design.

[0034] The second fitting part 120 has multiple guide segments, each paired with a straight guide surface, guiding a latch 130 in the radial direction. The latches 130 and their guide segments are evenly distributed around the circumference. In the figure, only one of the multiple latches 130 is shown as an example. The latches 130 are arranged in the installation space defined between the two fitting parts 110, 120. Each latch 130 has a toothing 132 on its radially outer end, which can engage with the toothed rim 112 (designed as a toothed ring) of the first fitting part 110. When the toothed rim 112 and latches 130 are in toothed engagement, the adjustment fitting 100 is locked and can absorb high torques about the rotation axis A. The latches 130 are preloaded toward the toothed rim 112 by a spring (in this case, a compression spring 134).

[0035] In order to unlock the adjustment fitting 100 and drive the second fitting part 120 relative to the first fitting part 110 about the rotation axis A, the adjustment fitting 100 further comprises an input disc 140 , a control disc 150 , a spring assembly 160 acting circumferentially between the input disc 140 and the control disc 150 , a positioning disc 170 and a drive disc 180 .

[0036] The input disc 140, the control disc 150, the spring assembly 160, the positioning disc 170, and the drive disc 180 are preferably each arranged at least largely within the installation space defined between the two fitting parts 110, 120. The input disc 140, the control disc 150, the positioning disc 170, and the drive disc 180 form a set of circular discs arranged axially adjacent to one another. These discs are all arranged concentrically about the rotation axis A and can be coupled to one another at the desired time by means of springs, drive studs, and profiles, which are only partially shown in the figure. The individual coupling elements (studs, profiles, etc.) are preferably present multiple times symmetrically about the rotation axis A, particularly as a function of the number of latches 130.

[0037] The input disc 140 is non-rotatably connected to a drive 141 , in particular an electric motor, preferably a geared motor.

[0038] In this example, the control disk 150 is substantially disc-shaped and has an annular region 152 radially outwardly. The control disk 150 also has a plurality of control cams 154. The number of control cams 154 corresponds to the number of latches 130. Each control cam 154 protrudes radially inward from the circular, cylindrical radially outer surface of the annular region 152. Each control cam 154 has a positioning profile 154b extending substantially in the circumferential direction and a ramp profile 154a connecting the radial inner surface of the annular region 152 to the positioning profile 154b. The end of the control cam 154, distal to the ramp profile 154a, may rise radially outward.

[0039] The control disc 150 is rotatably mounted in the mounting space, preferably on the first fitting part 110 and / or the second fitting part 120. The control disc 150 is circumferentially coupled to the input disc 140 via a spring assembly 160. Relative rotation between the input disc 140 and the control disc 150 tensions or relaxes the spring assembly 160. In the tensioned state of the spring assembly 160, the spring assembly 160 stores energy provided by elastic deformation, in particular by the actuator 141. This energy can, while relaxing the spring assembly 160, cause the input disc 140 and the control disc 150 to rotate relative to each other in a manner described in more detail below. The amount of this energy can be actively adjusted in various ways, ultimately by defining the relative rotational angle between the input disc 140 and the control disc 150, and by the effective spring rate of the spring assembly 160. The rotational angle or the associated torque balance can also be defined, for example, by the geometry of the control cams 154 connected to the control disc 150, in particular their idle travel, local pitch, travel / angle progression, etc. Furthermore, the friction ratio between the input disk 140 and the control disk 150 can in particular be set as a function of the relative rotation angle, so that a movement sequence between the input disk 140 and the control disk 150 described in more detail below is possible.

[0040] The positioning disc 170 is rotatably mounted in the mounting space, preferably on the first fitting part 110 and / or the second fitting part 120. The positioning disc 170 is frictionally coupled to the input disc 140. The torque that can be transmitted between the input disc 140 and the positioning disc 170 can be defined in various ways known per se, in particular by means of an axial preload force, frictional interaction of contact surfaces, etc.

[0041] The positioning disc 170 also has a plurality of axially protruding positioning cams 172, which can be specifically designed to be securely connected to the "through-positions" or pins or studs of the positioning disc 170. The number of positioning cams 172 corresponds to the number of latches 130. The positioning cams 172 are arranged in a radially outer area of the positioning disc 170, evenly distributed around the circumference. With the help of the positioning cams 172, the latches 130 can be frictionally held in the unlocked position. To this end, the positioning cams 172 can bear the axially protruding latch cams 136 of the latches 130 under preload and in a manner described in more detail below.

[0042] The drive disc 180 is rotatably mounted in the mounting space, preferably on the first fitting part 110 and / or the second fitting part 120. The drive disc 180 is frictionally coupled to the positioning disc 170. The torque that can be transmitted between the drive disc 180 and the positioning disc 170 can be defined in various ways known per se, in particular by means of an axial preload, frictional matching of contact surfaces, etc.

[0043] The drive disc 180 also has a plurality of axially projecting drive cams 182, which can be specifically designed as "through-positions" or pins or studs fixedly connected to the drive disc 180. The number of drive cams 182 corresponds at most to the number of latches 130. The drive cams 182 are arranged in a radially outer region of the drive disc 180, evenly distributed around the circumference. The drive cams 182 can be used to apply a force to the latches 130 in the circumferential direction, causing the latches 130 to rotate relative to the first fitting part 110 via a guide segment in the second fitting part 120.

[0044] At the start of the adjustment process of the adjustment fitting 100, the teeth 132 of the latch 130 must first disengage from the toothed rim 112 of the first fitting part 110 before relative rotation between the fitting parts 110, 120 can occur. To achieve this, the latch 130 moves radially inward. The unlocked state of the latch 130 must be maintained throughout the relative rotation between the fitting parts 110, 120. After the relative rotation is complete (by shutting down the actuator), the latch 130 must return to a locked state with the toothed rim 112 to absorb any loads from use or impact. The necessary radial outward movement of the latch 130 requires mechanical energy. However, since locking must occur immediately upon or after shutting down the actuator—that is, when no further energy is introduced into the adjustment fitting 100—the energy required for locking (the radial outward displacement of the latch 130) must be stored in the adjustment fitting 100. This function is performed by the spring assembly 160, which is connected to the input disk 140 on one hand and to the control disk 150 on the other.

[0045] Refer to the following diagram Figures 1 to 8The adjustment process of the adjustment accessory 100 is explained below, with the adjustment accessory 100 shown in a highly simplified and abstracted form for better understanding. The sequence of the figures corresponds to the sequence of unlocking, setting, and relocking the adjustment accessory 100. Only one latch 130 is shown with its associated control cam 154, associated positioning cam 172, and associated drive cam 182. The operation of the adjustment accessory 100 is described with reference to the one latch 130 shown. The other latches 130 operate in a similar manner.

[0046] Figure 1 and Figure 2 The adjustment fitting 100 is shown in a locked initial position, wherein the toothing 132 of the latch 130 guided in the second fitting part 120 engages with the toothed rim 112 of the first fitting part 110. The control cam 150, the positioning cam 170 and the drive cam 182 are in a relative angular position relative to each other and to the second fitting part 120, so that the control cam 154, the positioning cam 172 and the drive cam 182 are all located on the same side of the latch cam 136 when viewed in the circumferential direction. Figure 1 and Figure 2 on the right side.

[0047] In order to be able to rotate the first fitting part 110 currently connected to the backrest of the vehicle seat relative to the second fitting part 120 currently connected to the seat part of the vehicle seat about the rotation axis A and thus to be able to change the inclination angle of the backrest relative to the seat part, the adjustment fitting 100 must first be unlocked.

[0048] exist Figure 3 In the illustrated state of the adjustment accessory 100, the actuator has moved the input disk 140 (in Figure 3 The input disc 140 is rotated approximately 15 degrees (counterclockwise) in the middle. Due to this rotation of the input disc 140, the spring assembly 160 is tensioned and drive energy is stored between the input disc 140 and the control disc 150. This drive energy can be used in subsequent process steps. The amount of this drive energy can be defined in various ways, in particular by defining the relative rotation angle between the input disc 140 and the control disc 150, and by the effective spring rate of the spring assembly 160. The rotation angle or the associated torque balance can be defined, for example, by the geometry of the control cam 154 connected to the control disc 150, its idle travel, the local slope of the ramp profile 154a, the travel / angle progression, etc.

[0049] By comparison Figure 3 and Figure 1, it can be seen that the positioning cam 172 of the positioning plate 170 has moved the same angle as the input plate 140 and is about to contact the latch cam 136 of the latch 130. In the first step, this synchronized movement between the input plate 140 and the positioning plate 170 occurs through the friction coupling described above. The transmittable torque between the input plate 140 and the positioning plate 170 can be defined by the preload force, the friction between the contact surfaces, and so on.

[0050] exist Figure 4 The adjustment fitting 100 is shown in a state in which the positioning cam 172 is already in contact with the latching cam 136. This state, which further determines the minimum contact force between the positioning cam 172 and the latching cam 136, can be defined independently of the external load on the adjustment fitting 100. This serves to maintain the latch 130 in the unlocked, radially more inward position even if the external load becomes too small to maintain the unlocked position of the latch 130.

[0051] In the further process, the ramp profile 154a of the control cam 154 of the control disk 150 runs upward onto the latch cam 136, which then displaces the latch cam 136 radially inward. Subsequently, the positioning profile 154b of the control cam 154 reaches the latch cam 136 and thereby holds the latch 130 in the unlocked position. This situation is as follows Figure 5 shown.

[0052] Figure 6 yes Figure 5 A partial enlarged view of . Figure 6A is similar to Figure 6 , a partial enlarged view, in particular showing the latch cam 136' of the setting accessory according to a variant of the first embodiment, the design of which latch cam 136' is different from the latch cam 136 described previously, because the contact geometry between the positioning cam 172 and the latch cam 136' is designed in such a way that the latch 130 can be fixed in the unlocked (radially inner) position not only by friction, but also by positive engagement or positive locking or form-fitting engagement.

[0053] By observing and comparing Figure 6 and Figure 7As can be clearly seen, the control disc 150 is initially prevented by appropriate means from further rotation with the input disc 140 relative to the second fitting part 120, whereby the drive disc 180 continues to rotate with the input disc 140 until the drive cam 182, via a bearing, abuts the latch cam 136, actuating the latch 130 and thereby the second fitting part 120 in a pivoting manner about the rotation axis A. The latch 130 continues to be held in the unlocked (radially inward) position because the radially outward spring force of the compression spring 134 and the radially inward friction component of the tangential force of the friction connection between the input disc 140 and the positioning disc 170 oppose each other, so that, with a suitably high-torque friction connection between the input disc 140 and the positioning disc 170, the latch 130 can be securely held in the unlocked position.

[0054] Figure 8 The adjustment fitting 100 is shown after the angular position of the second fitting part 120 has been adjusted and locked again.

[0055] After the desired backrest inclination angle has been reached and the drive has been switched off, in particular when the user of the vehicle seat releases the control element for the electric adjustment of the inclination angle, the drive torque of the drive suddenly drops to almost zero, whereby both the drive force of the input disc 140 and the torque of the positioning disc 170 become zero. In the case of a drive by means of a self-locking gear motor, the input disc 140 cannot rotate back, so the now preloaded spring assembly 160 continues to rotate the remaining discs of the adjustment fitting 100 in the same direction (counterclockwise in the figure).

[0056] The latch 130 is now completely acted upon by the preload of the compression spring 134 and, at right angles or perpendicular thereto, by the frictional force generated by the friction between the control cam 154 and the latch cam 136, which, if the latter is properly designed, is overcome by the preload of the compression spring 134. Due to the energy stored in the spring assembly 160, the control disk 150 continues to rotate, causing the latch 130 to be released from the control cam 154 and pushed radially outward to its locked position. Figure 8 Displays this locked state.

[0057] Figure 9 and Figure 10 A partial circumference of an adjustment fitting 200 according to a second embodiment is shown. The adjustment fitting 200 comprises a first fitting part 210, a second fitting part 220, and three gears 230. The first fitting part 210 serves as the ring gear of the planetary gears and also includes the internal teeth 214 of the locking latch. The second fitting part 220 serves both as the web of the planetary gears and as a guide element for the locking latches. The adjustment fitting 200 includes an eccentric 250.

[0058] The first fitting part 210 has a first internal toothing 212, which forms the first internal toothing of the ring gear of the planetary gear. The three gears 230 act as planets of the planetary gear and are each rotatably mounted on one of the three bearing pins of the second fitting part 220. Figure 9 and Figure 10 Not shown, it acts as a web and meshes with the first internal toothing 212. For better illustration, Figure 10 Only one of the three gears 230 and one of the latches 240 are shown.

[0059] The bearing pins of the web are arranged at 120 degrees to each other around the axis of rotation A. The sun gear is not Figure 9 and Figure 10 The sun gear, which is mounted to rotate about the rotation axis A, is not shown. Figure 9 and Figure 10 middle.

[0060] The sun gear or eccentric 250 is preferably made of Figure 9 and Figure 10 An adjusting fitting drive (not shown) corresponds to the adjusting fitting 100 of the first embodiment, wherein the second fitting part 120 of the adjusting fitting 100 is fixedly connected to the sun gear or eccentric 250 of the adjusting fitting 200 .

[0061] The first fitting part 210 can be firmly connected to the seat substructure of the vehicle seat.The second fitting part 220 can be firmly connected to the backrest of the vehicle seat so that the (output) web of the planetary gear mechanism can be firmly connected to the backrest.

[0062] The second fitting part 220 also serves as a guide element for the latching latches. To this end, the second fitting part 220 has three guide channels 222 for each of the three latches 240. Each latch 240 is guided radially in its associated guide channel 222 relative to the axis of rotation A. Each latch 240 carries a set of teeth 242 radially outwardly that can mesh with the second set of internal teeth 214 of the first fitting part 210. When the latches 240 guided in the second fitting part 220 are in toothed engagement with the second internal teeth 214 of the first fitting part 210, the first fitting part 210 and the second fitting part 220 are interlocked so as to prevent relative rotation about the axis of rotation A.

[0063] For the implementation of the invention in its various embodiments, the features disclosed in the above description, the claims and the drawings can be of significance both individually and in combination, provided they remain within the scope of protection of the claims.

[0064] Although the present invention has been described in detail in the drawings and in the foregoing examples, these descriptions are illustrative and exemplary and should not be construed as limiting. In particular, the proportions of the various elements shown in the drawings should not be construed as necessary or limiting. Furthermore, the present invention is not specifically limited to the illustrated examples. Further variations of the present invention and its embodiments will be apparent to those skilled in the art from the foregoing disclosure, the drawings, and the claims.

[0065] Terms such as "comprising", "having", "containing", "including" etc. used in the claims do not exclude other elements or steps. The use of the indefinite article does not exclude a plurality. A single device may perform the functions of several units or devices recited in the claims.

[0066] 100 adjustment accessories 160 spring assembly

[0067] 110 first accessory part 170 positioning plate

[0068] 112 toothed rim 172 positioning cam

[0069] 120 second accessory part 180 drive disk

[0070] 130 latch 182 drive cam

[0071] 132 tooth shape 200 adjustment accessories

[0072] 134 compression spring 210 first accessory part

[0073] 136 latch cam 212 first internal tooth profile

[0074] 136' latch cam 214 internal teeth

[0075] 140 input disk 220 second accessory part

[0076] 141 driver 222 guide channel

[0077] 150 control panel 230 gear

[0078] 152 annular area 240 latch

[0079] 154 control cam 250 eccentric

[0080] 154a Ramp profile A rotation axis

[0081] 154b positioning profile

Claims

1. An adjustment fitting (100) for a vehicle seat, comprising a first fitting part (110) and a second fitting part (120), the second fitting part (120) being rotatable relative to the first fitting part (110) about a rotation axis (A), the adjustment fitting (100) having at least one latch (130), which is radially guided in one of the two fitting parts (110, 120) for locking the first fitting part (110) to the second fitting part (120), It is characterized in that The adjustment accessory (100) has an input disc (140) connectable to a driver (141) and a positioning disc (170) connected to the input disc (140) by friction, and The positioning disc (170) holds at least one latch (130) in an unlocked position when the driver (141) is activated, and the positioning disc (170) has a plurality of axially protruding positioning cams (172) which are arranged in a radially outer region of the positioning disc (170) and are evenly distributed on the circumference.

2. The adjustment accessory (100) according to claim 1, characterized in that In the activated state of the driver (141), the drive disc (180) acts on the at least one latch (130) in the circumferential direction, so that the second fitting part (120) is rotated relative to the first fitting part (110).

3. The adjustment accessory (100) according to claim 2, characterized in that The adjustment accessory (100) further comprises a control disc (150) circumferentially coupled to the input disc (140) by means of a spring assembly (160), wherein in an activated state of the actuator (141), the spring assembly (160) acting between the input disc (140) and the control disc (150) is preloaded.

4. The adjustment accessory (100) according to claim 3, characterized in that The spring assembly (160) is less preloaded in the deactivated state of the actuator (141) than in the activated state of the actuator (141).

5. The adjustment accessory (100) according to claim 1 or 2, characterized in that: The second fitting part (120) is selectively drivable in two opposite rotational directions relative to the first fitting part (110).

6. The adjustment accessory (100) according to claim 3, characterized in that When the adjustment accessory (100) is adjusted by relative rotation between the input disc (140) and the control disc (150), the spring assembly (160) is tensionable so that the spring assembly (160) stores driving energy between the input disc (140) and the control disc (150).

7. The adjustment accessory (100) according to claim 6, characterized in that To adjust the position of the accessory (100), the control disc (150) is further rotated by means of the energy stored in the spring assembly (160), so that the latch (130) can be released by the control cam (154) and the latch (130) can be pushed into the locked position.

8. The adjustment accessory (100) according to claim 3, characterized in that The drive disc (180) has a plurality of axially protruding drive cams (182), which are arranged in a radially outer region of the drive disc (180) and are evenly distributed on the circumference.

9. The adjustment accessory (100) according to claim 8, characterized in that The control disc (150) has a plurality of control cams (154), each control cam (154) having a positioning profile (154b) and a ramp profile (154a), wherein the positioning profile (154b) extends substantially in the circumferential direction, and the ramp profile (154a) connects the radial inner surface of the annular region (152) of the control disc (150) with the positioning profile (154b).

10. The adjustment accessory (100) according to claim 9, characterized in that The number of control cams (154), the number of positioning cams (172), and the number of drive cams (182) are each at least twice the number of latches (130).

11. The adjustment accessory (100) according to claim 9, characterized in that A portion of the control cam (154), the positioning cam (172) and the drive cam (182) is effective in a first rotational direction, and another portion of the control cam (154), the positioning cam (172) and the drive cam (182) is effective in a second rotational direction.

12. A vehicle seat with an adjustment fitting (100) according to any one of the preceding claims 1-11.

Images