FITTING, METHOD FOR MOUNTING A FITTING AND VEHICLE SEAT

Abstract

Fitting, in particular a backrest lock for a vehicle seat, with which a movable part can be secured in its position on a stationary part (8, 30), wherein the fitting has a latching pawl (2) which can be transferred from a locking to an unlocked position, and a lever (1) by means of which the latching pawl (2) can be secured in its locked position by the lever (1) resting on the latching pawl (2) in a contact area (5) in a securing position, wherein a stop means (4) is provided on the lever (1), characterized in that the stop means (4) rests on a stop (12) in the securing position of the lever (1), wherein the lever (1) is at least partially covered by a cover (3) to which the stop (12) is fastened, wherein the stop (12) is at least partially plastically deformed during assembly.

Description

The present invention relates to a fitting, in particular a backrest locking mechanism for a vehicle seat, with which a movable part can be secured in its position on a stationary part, wherein the fitting has a latching pawl, which can be transferred from a locking position into an unlocked position, and a lever, by means of which the latching pawl can be secured in its locked position by the lever resting on the latching pawl in a contact region in a securing position, wherein a stop means is provided on the lever.The invention also relates to a method for mounting a fitting.The invention also relates to a vehicle seat having a seat part and a backrest rotatably connected to the seat part, in which the position of the backrest relative to the seat part can be locked by means of a fitting.Prior ArtDE 10 2005 050 475 A1 discloses a backrest hinge fitting for a fold-forward vehicle seat, with which a second articulated arm can be secured in its position on a fixed first articulated arm, wherein the fitting has a blocking cam, which is similar to a latching pawl and can be transferred from a locking position into an unlocked position, and a control arm, which is designed as a lever and by means of which the blocking cam can be secured in its locked position by the control arm resting on the blocking cam in a contact region in a securing position.A further fitting for a vehicle seat is known from DE 10 2011 013 788 A1, having a first fitting part and a second fitting part, which is in transmission connection with the first fitting part, for a relative rolling movement for adjusting the inclination of the backrest of the vehicle seat between different use positions.The object is to provide a method for performing a processThe invention is based on the object of improving a fitting of the type mentioned at the beginning, in particular making it less sensitive to excessive use loads, and of providing a method for mounting such a fitting and a vehicle seat with such a fitting.SolutionThis object is achieved according to the invention by a fitting having the features of claim 1, a method for mounting a fitting having the features of claim 9 and a vehicle seat having the features of claim 10.Because a stop means of the lever abuts a stop in the securing position of the lever, it is prevented that the lever automatically moves into a position in which it no longer interacts with the ratchet, in particular clampingly.Advantageous embodiments which can be used individually or in combination with one another are the subject matter of the dependent claims.The present invention preferably relates to a fitting, in particular a backrest locking device, with which a backrest of a vehicle seat, which is rotatably arranged on a seat part, can be fixed in a specific position. In particular, the present invention relates to a fitting for a backrest rapid adjustment, with which the backrest of the vehicle seat can be fixed in particular in one or two positions, namely a stowage position and / or a use position. This fixation is effected by a latching pawl which has a latching nose which cooperates, for example, in a positive and / or non-positive manner with a recess which is provided on a stationary part, for example, the seat part of the motor vehicle or the body of the vehicle. This detent can be moved from a locking position into an unlocked position. Furthermore, the fitting has a lever which secures the latching pawl in its locked position and can preferably also unlock the latching pawl. The lever secures the latching pawl in its locked position by abutting it in a clamping manner in a contact region and thereby preventing the latching pawl from automatically unlocking.The lever is preferably provided rotatably about a rotational axis, wherein the latching pawl is unlocked in one rotational direction and brought into its locking position in the opposite rotational direction and is secured there in a clamping manner.According to the invention, the lever is at least partially covered with a cover, in particular a sheet metal cover. This sheet metal part is preferably a stamped sheet metal part.Preferably, the stop is provided integrally on the cover and is punched out together with the cover.According to the invention, this stop is at least partially plastically deformed during the assembly of the fitting according to the invention.The stop can be tongue-shaped. This tongue shape is particularly preferably wavy. The tongue is preferably integrally connected at one end to the cover, while the other end preferably interacts with the pin. The plastic deformation of the stop preferably takes place in the region in which the tongue is connected to the cover.The fitting according to the invention preferably has a spring, in particular a torsion spring, which prestresses the lever in the direction of its securing position. Preferably, this spring force is lower, in particular substantially lower, than the force required to plastically deform the stop. The spring presses the stop means, in particular the pin, against the stop, so that it is secured against unintentional adjustment in two rotational directions.A further subject matter of the present invention is a vehicle seat having the features of patent claim 10. The fitting is preferably part of a quick adjustment with which the backrest can be brought from a substantially vertical position of use into a substantially horizontal stowage position. Preferably, the locking according to the invention locks the backrest in at least one of these two positions.The present invention further provides a method for mounting the fitting according to the invention, in which the lever is acted upon by a defined force until the fitting is locked without play, as a result of which the stop is at least partially plastically deformed.The explanations made with respect to this subject matter of the present invention apply equally and vice versa to the fitting according to the invention or the vehicle seat according to the invention.FIGURES AND EMBODIMENTS OF THE INVENTIONThe invention is explained below with reference to FIGS. 1 to 7. These explanations are merely exemplary and do not limit the general inventive concept. The explanations apply equally to all the subject matters of the present invention. The following are shown: FIG. 1 : a seat part of a vehicle seat with a fitting on both outer sides of the seat according to the prior art, FIG. 2 : a perspective view of the fitting from FIG. 1, FIG. 3 : a side view of the fitting from FIG. 1, FIG. 4 : a detailed view of the fitting from FIG. 1, FIG. 5 : a detailed view of a cover, a stop means designed as a pin and a stop of a fitting according to the invention, FIG. 6 is a view corresponding to FIG. 5 during an assembly step in which the stop is plastically deformed, and FIG. 7 : a view corresponding to FIG. 6 in a further assembly step in which the stop elastically springs back.The structure of a vehicle seat comprises a seat part 30 and a backrest which is connected to the seat part 30 by means of two fittings and is connected to a fitting in each case via a backrest adapter 20.FIGS. 1 to 4 show a fitting according to the prior art, with which the backrest of the vehicle seat, which is provided rotatably on the seat part 30 or the vehicle body, can be locked relative to the seat part 30 of such a motor vehicle seat or the vehicle body. A locking device of the fitting has for this purpose a latching pawl 2 which is provided supported about the axis of rotation 7 and can be unlocked by a clockwise rotation and locked by a rotation (counter-clockwise in FIG. 4 ), wherein in the locking position a latching nose 10 of the latching pawl 2 cooperates in a positive and / or non-positive manner with a recess which is provided in the stationary part 8, for example the seat part 30 or the body of the vehicle. Furthermore, the fitting has a release or locking lever 1 (referred to below and above as lever 1) which is mounted rotatably about an axis of rotation 11. Upon a counterclockwise rotation, the lever 1 interacts with the latching pawl 2 and rotates it in the clockwise direction, so that it is transferred into an unlocking position. Upon a clockwise rotation, the lever 1 presses the latching nose 10 of the latching pawl 2 into the recess provided for locking in the stationary part 8 and secures the latching pawl 2 in the locking position in that the lever 1 interacts with the latching pawl 2 in a contact region 5, in particular in a self-locking and / or clamping manner, so that the latter cannot be released automatically.At least the lever 1 is provided with a cover 3, in particular a cover plate 3, which in the present case has a slotted link 6, in which a stop means designed as a pin 4 moves, which is firmly connected to the lever 1.Furthermore, the fitting preferably has a spring means, in particular a torsion spring means, which prestresses the lever 1 in the direction of its locking position, i.e. rotating clockwise in FIG. 4. Due to play, it can now happen that the lever 1 rotates clockwise beyond the clamping region, whereby a sufficient securing of the latch 2 is no longer provided.In order to prevent this, the fitting according to the invention according to FIGS. 5 to 7 has a stop 12 which prevents the pin 4 firmly connected to the lever 1 from being able to be rotated beyond a certain point (clockwise in FIGS. 5 to 7 ). The stop 12 is formed in one piece with the cover 3. The cover 3 is preferably a sheet metal part which is particularly preferably punched out. During this punching process, the stop 12 is likewise produced, i.e. punched out. In the present case, the stop 12 is formed tongue-like, wherein one end of the tongue represents the integrally formed connection to the cover 3 and an opposite, free-standing end of the tongue interacts with the pin 4, i.e. can come into contact therewith. Preferably, the tongue is corrugated. In the locked state of the lever 1, the pin 4 is pressed against the stop 12 by the spring means not shown in the figures.FIGS. 5 to 7 show the mounting of the fitting according to the invention. After the latter has been pre-assembled, the pin 4 is moved in the direction of the stop 12, here rotated in the clockwise direction until the fitting according to the invention in the locked state has at least virtually no play any longer, which is symbolized by the arrow with the reference sign 14, which also represents a deformation path 14 of the stop. For this purpose, a force is necessary which is greater, in particular substantially greater, than the force of the spring with which the pin 4 is pressed against the stop 12 in an operating state. The movement of the pin 4 is transmitted to the tip of the stop 12, which is designed in the present case in the form of a tongue, as a result of which the stop 12 is deformed plastically in a certain region, a region of plastic deformation 13, in this case at the root of the tongue-shaped stop 12, and other regions of the stop 12 are deformed elastically.As soon as the fitting has locked at least almost without play, the force on the pin 4 is removed. Because the stop 12 has also undergone an elastic deformation in addition to the plastic deformation in the region of plastic deformation 13, the tip of the stop 12 moves back by an elastic restoring distance Δs, which is symbolized by the arrow with the reference symbol 9. The stop 12 is now in a position in which the fitting locks without play under normal conditions of use. As a result, the stop 12 of the fitting is coordinated and its tolerances are compensated accordingly.The features disclosed in the above description, the claims and the drawings can be important both individually and in combination for the realization of the invention in its various configurations.List of reference characters1 Lever (unlocking and locking lever) 2 Ratchet 3 Cover, cover plate 4 Stop means, pin 5 Contact region between the lever 1 and the ratchet 2 6 Link 7 Axis of rotation of the ratchet 8 Stationary part 9 Elastic return path 10 Ratchet 11 Axis of rotation of the lever 1 12 Stop 13 Region of plastic deformation 14 Deformation path 20 Backrest adapter 30 Seat part

Claims

Fitting, in particular backrest locking for a vehicle seat, with which a movable part can be secured in its position on a stationary part (8, 30), wherein the fitting has a latching pawl (2) which can be transferred from a locking position into an unlocked position, and a lever (1) by means of which the latching pawl (2) can be secured in its locked position by the lever (1) in a securing position resting in a contact region (5) on the latching pawl (2), wherein a stop means (4) is provided on the lever (1), characterized in that the stop means (4) in the securing position of the lever (1) rests on a stop (12), wherein the lever (1) is at least partially covered with a cover (3) to which the stop (12) is fastened, wherein the stop (12) is at least partially plastically deformed during assembly.Fitting according to claim 1, characterised in that the latching pawl (2) has a latching nose (10) which cooperates in a positive and / or non-positive manner with a recess in the fixed part (8, 30).Fitting according to claim 1 or 2, characterised in that the lever (1) is mounted rotatably about an axis of rotation (11).Fitting according to one of Claims 1 to 3, characterized in that the cover (3) is a sheet metal cover.Fitting according to one of Claims 1 to 4, characterized in that the stop (12) is formed integrally with the cover (3).Fitting according to one of Claims 1 to 5, characterized in that the stop (12) has a tongue shape, in particular a corrugated tongue shape.Fitting according to claim 6, characterised in that the tongue is connected at one end thereof in one piece with the cover (3), while the other end interacts with the stop means (4).Fitting according to one of Claims 1 to 7, characterized in that the stop (12) is plastically deformed in a region (13) in which the stop (12) is fastened to the cover (3).Method for mounting a fitting according to one of Claims 1 to 8, in which the lever (1) is acted upon by a defined force until the fitting is locked without play, as a result of which the stop (12) is at least partially plastically deformed.Vehicle seat having a seat part (30) and a backrest rotatably connected to the seat part (30), characterized in that the position of the backrest relative to the seat part (30) can be locked by means of a fitting according to one of Claims 1 to 8.

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