CN114714998A - Seat height adjustment system - Google Patents

Seat height adjustment system Download PDF

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Publication number
CN114714998A
CN114714998A CN202210007903.7A CN202210007903A CN114714998A CN 114714998 A CN114714998 A CN 114714998A CN 202210007903 A CN202210007903 A CN 202210007903A CN 114714998 A CN114714998 A CN 114714998A
Authority
CN
China
Prior art keywords
flange
tab
height adjustment
drive module
adjustment system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210007903.7A
Other languages
Chinese (zh)
Inventor
维罗尼奎·莱罗伊
柳伊斯·菲利佩·马奎斯·阿布勒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faurecia Sieges dAutomobile SAS
Original Assignee
Faurecia Sieges dAutomobile SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faurecia Sieges dAutomobile SAS filed Critical Faurecia Sieges dAutomobile SAS
Publication of CN114714998A publication Critical patent/CN114714998A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
    • B60N2/165—Gear wheel driven mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/0224—Non-manual adjustments, e.g. with electrical operation
    • B60N2/02246—Electric motors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1605—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the cinematic
    • B60N2/161—Rods
    • B60N2/1615—Parallelogram-like structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/04—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable
    • B60N2/16—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable
    • B60N2/1635—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the whole seat being movable height-adjustable characterised by the drive mechanism
    • B60N2/167—Ratchet mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/682—Joining means

Abstract

Seat height adjustment system (1), comprising: -a flange (Fl) of the seat frame, the flange having an inner side (Ci) and an outer side (Ce); -a housing (3) arranged inside the flange; -a drive module (2) arranged outside the flange, fixed to the flange, the drive module having a rotatable output (20), the output (20) protruding through an opening of the flange and being accommodated in a compartment formed by the housing (3); and wherein the housing has a centering portion comprising at least one cylindrical portion (30) extending through the circular opening of the flange to the outer side (Ce) of the flange, wherein the cylindrical portion (30) is radially deformed to form a catch (31) beyond the diameter of the circular opening, said catch engaging with the flange on the edge of the circular opening on the outer side (C1).

Description

Seat height adjustment system
The present invention relates to a height adjustment system for a seat, and a method for assembling the adjustment system.
Technical Field
The present invention is in the field of mechanisms for adjusting the height of at least a portion of a vehicle seat, in particular for adjusting the seat portion of a vehicle seat.
The present invention relates generally to a variety of manual adjustment mechanisms that allow a seat occupant to adjust the height of the seat portion with manually-actuated energy, typically actuated by pump motion on the input of an irreversible adjustment mechanism that is integrally formed with the flange of the seat portion frame (also referred to as the seat portion chassis), which is height adjustable.
The motion of these pumps typically drives the output member of the adjustment mechanism with a toothed shaft gear that meshes with a gear sector, which is typically part of an articulation that links the seat frame. The height of the seat frame is movable up to a portion of the seat where the height is fixed.
More particularly, the present disclosure relates to various assembly techniques for securing an irreversible adjustment mechanism to a seat portion flange.
Traditionally, this involves assembly between the irreversible adjustment mechanism on the flange and the housing. The mechanism is typically located on the outside, i.e. the side accessible to the operating handle that drives the mechanism input, of the flange, while the housing is fixed to the other, i.e. the inside, side of the flange. The housing forms a compartment for the shaft gear, which protrudes from the opening in the flange, on the side where the shaft gear meshes with the sector gear (or rack).
The distal end of the shaft gear typically includes a circular shoulder that mates with a guide opening provided in the housing to guide rotation of the shaft gear at the distal end.
One of the purposes of this assembly is to control the backlash between the toothed shaft gear and the sector gear (or rack).
It is important to eliminate the gap between the shaft gear and the sector gear (or rack) forming the output member so as to ensure good contact between the teeth of the shaft gear and the teeth of the sector gear (or rack) in the event of a collision. Otherwise, if an uncontrolled gap occurs, the contact between the teeth will not be sufficient to prevent the teeth from breaking when subjected to the stresses generated by the impact.
Further, eliminating the gap can eliminate noise during the height adjustment operation.
However, the present invention is not limited to the manual actuating mechanism, but may have a specific application in which the electric mechanism is assembled to the flange, outside the flange, and fixed to the inside together with the housing. The electric actuator may be mounted upside down, i.e. the electric actuator may be fixed to the inside and the housing to the outside.
In this case, the electric mechanism includes an electric motor that drives the output shaft gear. The mechanism is secured to one side of the flange and the shaft gear passes through an opening in the flange for receipt in a housing secured to the other side of the flange with the shaft gear engaging the sector gear (or rack). The distal end of the shaft gear includes a shoulder having a surface that mates with a guide opening in the housing.
Background
Therefore, in the prior art, irreversible adjustment mechanisms of the manual type are known, as shown in the left side view in fig. 1:
-a support member;
an input member Oe mounted to pivot relative to the support member about an axis of rotation Y, resiliently biased towards a rest position N, which is manually movable in a first direction within a first angular sector SI of the adjustment mechanism and in a second direction within a second angular sector SII of the adjustment mechanism.
Such an adjustment mechanism is configured to move the height adjustable portion of the seat upwardly when the input is moved in a first direction away from its rest position and to move the height adjustable portion of the seat downwardly when the input is moved in a second direction away from its rest position.
Such an adjustment mechanism comprises an output member which is mounted to pivot about an axis of rotation, a drive and lock system which is arranged on the one hand to drive the output member from the input member when the input member is moved away from its rest position in a first direction in a first angular sector SI or in a second direction in a second angular sector SII, and on the other hand to lock the rotation of the output member when the input member is returned to its rest position N.
Such irreversible adjustment mechanisms are known to the person skilled in the art and will therefore not be described in further detail. For more details on the structure of the irreversible adjustment mechanism, the person skilled in the art can refer to the description of document FR 2,809,355a1 of the applicant.
It should be noted, however, that the irreversible adjustment mechanism usually comprises, as a component essential to its operation, a clamping body (in the form of rollers or balls) having the function of ensuring the locking of the output member by wedge effect, so that the shaft gear can engage with the sector gear (or with the rack), in particular when the input member is in its rest position.
As can be seen from the bottom of the exploded view of fig. 7 in FR 2,809,355a1, the housing of the irreversible adjustment mechanism of document FR 2,809,355a1 comprises a connecting plate with a central opening (called the peg shaft in document FR 2,809,355a 1) through which the output shaft gear passes. The connecting plate comprises three holes, radially close to the central opening, for the connecting piece to ensure the irreversible assembly of the inner and of itself of the regulating mechanism. The connection plate also comprises three holes located at a distance from the central opening, which holes allow the passage of the connecting screws/nuts (usually bolts).
A plurality of screws of a plurality of bolts pass through a plurality of holes in the flange, but also through a plurality of holes in the housing, which is located on the other side of the flange relative to the irreversible adjustment mechanism.
The tightening bolts may fix the position of the assembly (i.e., the irreversible adjustment mechanism on one side of the flange and the housing on the other side of the flange), and may fix the position of the housing and the irreversible adjustment mechanism during both the tightening and tightening processes.
In particular, according to this assembly technique by screwing the bolts, the holes made on the flange wall of the seat part frame are intentionally oversized with respect to the cross section of the screws, usually in the form of oblong holes. These oblong holes allow the position of the assembly to be adjusted by moving the shaft gear of the assembly closer to (or further from) the teeth of the sector gear (or rack).
These oblong holes advantageously allow the adjustment described above, allowing a better adjustment of the operating clearances between the teeth of the shaft gear and the teeth of the sector gear (or rack), until the clearances between the teeth of the shaft gear and the teeth of the sector gear (or rack) are eliminated in the mechanism.
The technique of integral assembly (irreversible adjustment mechanism with casing) using bolts and correction of the clearance by adjusting the screws in the oversized holes in the flanges represents the assembly method that is best known to the person skilled in the art. It is particularly useful when tolerance stack-ups from assembly to subassembly require the installation of oblong holes rather than circular holes.
However, a second assembly method is known from the prior art, which has the advantage that no components need to be added in the irreversible adjusting mechanism and in the housing for assembly. In other words, the second method does not require bolts, unlike the first assembly method described above: the connection is substantially started from the inside of the flange, by inserting the tabs of the casing into the attachment holes of the flange, then folding back and resting on the opposite side of the flange, i.e. bending back on the outside, then passing in turn the tabs of the irreversible adjustment mechanism, which are inserted, starting from the outside, into the holes in the flange, or even simultaneously into the holes of the casing plate, then folded back inside the flange.
This assembly method follows the sequence that the housing is first fixed to the flange, forming a compartment of the shaft gear on the inside of the flange, in preference to fixing the irreversible adjustment mechanism on the outside of the flange.
By controlling the tolerance stack-up of the various components and during assembly, and by the predetermined positioning of the housing on the flange of the seat part, elimination of backlash (between the shaft gear and the sector gear) is ensured without adjusting the position of the components on the flange.
This predetermined positioning is ensured by a positioning and centering system between the flange and the casing, which comprises two calibrated openings of the flange and two bosses projecting from the casing wall for abutting against the flange. The two bosses of the casing are then engaged in the two calibrated openings to ensure the predetermined positioning of the casing with respect to the flange, and by folding the tabs of the casing outside the flange, before connecting the casing to the flange.
Such a method according to this assembly sequence has the advantage that it is obtained without additional components (i.e. without bolts) and adjustment steps, so that the assembly can be carried out between the irreversible adjustment mechanism, the casing and the flange, as shown in fig. 2 to 7.
On the other hand, according to the inventors' studies, this method is still not entirely satisfactory in the event of a crash, since the housing/irreversible adjustment mechanism assembly can still slip, which can lead to shocks to cause the release of the locking element and therefore the unintended unlocking of the output element.
According to the observation of the inventors, in particular there are still:
the gaps between the attachment tabs of the casing and the flange holes through which the tabs pass, as shown in figure 5, will cause the casing to slide relative to the flange in the event of an impact;
the clearance between the attachment tabs of the irreversible adjustment mechanism and the flange holes through which these tabs pass, as shown on the right side of the mechanism in fig. 6 or on the left side of fig. 7, will cause the irreversible adjustment mechanism to slide with respect to the flange in the event of an impact.
Furthermore, the inventors have observed that the engagement between the plurality of bosses and the plurality of calibrated openings of the casing is only configured to ensure a predetermined positioning of the casing on the flange during attachment to the casing (as shown by the plurality of lower bosses in fig. 4), and it is not configured to ensure a secure grip in the event of an impact. In other words, in the event of an impact, the bosses will disengage from the aligned openings of the housing due to deformation without preventing the tabs of the housing from sliding within the holes of the flange.
Disclosure of Invention
The present invention aims to improve the above situation.
The invention provides a seat height adjusting system, which comprises:
-a flange of the seat frame, the flange having an inner side and an outer side;
-a housing arranged on a first side of the flange, fixed to the flange, the first side being an inner or outer side;
-a drive module provided on a second side of the flange opposite the first side, having a rotatable output protruding through an opening of the flange and accommodated in a compartment formed by the housing;
wherein the housing has a centering portion comprising at least one cylindrical portion extending into the circular opening of the flange, the at least one cylindrical portion extending through the circular opening of the flange from the first side of the flange to the second side of the flange, wherein the cylindrical portion is radially deformed to form a stop edge beyond the diameter of the circular opening, the stop edge snapping over the flange on the edge of the circular opening on the second side of the flange to eliminate a gap between the cylindrical portion and the circular opening.
The features set forth in the following paragraphs may be selectively implemented, which may be implemented independently or in combination with each other:
the casing has at least one folded tab extending into the at least one first hole of the flange and abutting against the second side of the flange;
the drive module comprises at least one tab folded into at least a second hole of the flange, directly or indirectly against the first side of the flange.
The at least one second hole of the flange through which the tab of the drive module passes comprises a lug of the flange constituting an edge of the second hole, said lug being intended to correct any clearance, said lug bearing against the tab to eliminate the fit clearance between the tab of the drive module and the second hole of the flange;
the casing has a wall resting on the flange, said wall having a third hole, and at least one tab of the drive module passing through at least one second hole of the flange simultaneously passes through the third hole of the casing and is folded against the wall of the casing on the first side of the flange;
the output member is a shaft gear rotating about its rotational axis, the shaft gear having at a distal end a guide shoulder received in the guide opening of the housing, the guide shoulder and the guide opening of the shaft gear ensuring rotational guidance of the shaft gear relative to the housing;
the shaft gear has peripheral milled teeth meshing with a sector gear integral with a hinge, which is connected to a frame whose height is variable and to which a portion of the seat is fixed. Alternatively, the shaft gear has peripheral milled teeth that mesh with the rack.
The at least one cylindrical portion comprises a plurality of cylindrical portions housed in a plurality of circular openings of the flange, the plurality of cylindrical portions being respectively provided with a plurality of retaining edges to ensure that they can be engaged on the flange on the second side of the flange.
According to one embodiment, the drive module is an irreversible manual adjustment mechanism comprising an input, which is usable from the outside (first side), is mounted so as to pivot relative to the rotation axis Y and is elastically biased towards the rest position N, is manually movable in a first direction within a first angular Sector (SI) of said adjustment mechanism and is manually movable in a second direction within a second angular Sector (SII) of said adjustment mechanism, and wherein the irreversible adjustment mechanism is configured to move the height-adjustable frame upwards when the input is away from its rest position N in the first direction and is configured to move the height-adjustable part of the seat downwards when the input is away from its rest position N in the second direction.
The adjustment mechanism comprises an output mounted to pivot about a rotational axis and a drive and lock system configured to ensure, on the one hand, drive of the output by the input when the input is moved away from its rest position in a first direction within a first angular sector or in a second direction within a second angular sector, and on the other hand to lock rotation of the output when the input is returned to its rest position.
For drive modules with irreversible manual adjustment mechanisms, the drive module is fixed to the outside so that the operator can access and operate the handle of the input device. In this case, the first side of the stationary housing is the inner side and the second side of the stationary (manual) drive module is the outer side.
Alternatively, the drive module is motorized, comprising an irreversible gear motor ensuring motorized height adjustment of at least one part of the seat relative to said fixed part, said gear motor driving the output in one direction or the other, for which said drive module is motorized, which can be fixed to the outside or inside of the flange.
The second side of the flange securing the motorized drive module is the outside or inside of the flange, and thus the first side securing the housing is the inside or outside.
According to a second aspect, the invention relates to a method of assembling a seat height adjustment system according to the invention, the assembly method comprising the following successive steps:
-a/positioning the housing on the flange on a first side of the flange, the first side being an inner or outer side of the flange, and inserting the cylindrical portion into the circular opening starting from the first side until the cylindrical portion protrudes from the second side of the flange;
-B/fixing the shell to the flange by radial deformation of the cylindrical portion until a stop edge (31) is obtained, said stop edge engaging the flange on the second side of the flange to eliminate the gap between the cylindrical portion and the circular opening;
-C/positioning the drive module on the flange on the second side of the flange;
andD/fixing the drive module to the flange.
According to an embodiment, the assembly method may provide:
-in the step/a/of positioning the casing on the flange, starting from the first side of the flange, inserting the tab of the casing into the first hole of the flange; and is
-in the step/B/of fixing the casing to the flange, starting from the second side, folding the tab of the casing and abutting it against the second side of the flange.
According to an embodiment, the assembly method may provide:
-in step/C/, starting from the second side, inserting a tab of the drive module in said at least one second hole;
-in the step of fixing the drive module to the flange, starting from the first side, folding the tabs of the drive module and then abutting the folded tabs against the first side of the flange, directly or indirectly against the flange.
According to an embodiment, in step C/the tab of the drive module passing through the second hole of the flange simultaneously passes through the third hole of the casing and the tab is folded over and abuts against the wall of the casing in step D/C.
According to an embodiment, in step/D/, the tab passing through the second hole is folded, and the lug of the flange is pressed against the folded tab until the fitting clearance between the tab of the drive module and the second hole of the flange is eliminated.
Drawings
Other features, details and advantages will become apparent upon reading the following detailed description and analyzing the accompanying drawings, in which:
FIG. 1 is a side view of a vehicle seat with a drive module having a manual non-reversible adjustment mechanism on the left and a motorized drive module on the right;
FIG. 2 is a view of the seat portion frame including the components between the flange of the frame, the drive module and the housing, the module axle gear meshing with the sector gear as is known in the art;
FIG. 3 is a detailed view of the housing of FIG. 2, as viewed from the inside of the flange, with the housing wall having two locating bosses as is known in the prior art;
FIG. 4 is a cross-sectional view of FIG. 3 showing the engagement between one of the plurality of bosses and the alignment opening of the flange as known in the prior art;
FIG. 5 is a view of the assembly of FIG. 2 from the outside of the flange, more particularly illustrating the drive module and the plurality of projections from the tabs of the housing that pass through the plurality of holes of the flange, there being a gap between the lugs and the holes according to the prior art that is responsible for slippage between the housing and the flange in the event of an impact;
FIG. 6 is a cross-sectional view of a gap between a straight tab from the irreversible adjustment mechanism and a hole in the flange through which the tab passes, which gap, in the event of an impact, would cause slippage between the irreversible adjustment mechanism and the flange, according to the prior art;
FIG. 7 is a cross-sectional view of a left tab from the irreversible adjustment mechanism, which passes through both the hole in the flange and the hole in the casing, and through the gap between the tab and the two holes, which gap, in the event of an impact, would cause sliding between the irreversible adjustment mechanism and the flange, according to the prior art;
FIG. 8 is a view of the seat portion frame including the assembly between the flange of the frame, the drive module and the housing according to the present invention, with the module axle gear engaged with the sector gear;
FIG. 9 is a detailed view of the housing, more particularly illustrating the cylindrical portion, including its stop edge;
FIG. 10 is a cross-sectional view through two cylindrical sections including a catch on the flange that engages the outside of the flange;
the left figure in fig. 11 is a view before modification of the cylindrical portion inserted in the circular opening of the flange, while the right figure shows the deformation of the cylindrical portion starting from the outside, eliminating the gap and forming the stop edge;
fig. 12a shows a view of the drive module in the form of an irreversible adjustment mechanism, viewed from the input;
fig. 12b shows a view of the drive module in the form of an irreversible adjustment mechanism, viewed from the output;
FIG. 13 is an assembly view from the inside of the flange (housing not shown), more particularly showing a plurality of second tabs from the drive module passing through a plurality of second holes of the flange, two second holes on the left side of the shaft gear being provided with a plurality of flange lugs that abut against the plurality of second tabs to act to eliminate play; and
FIG. 14 is a cross-sectional view through the second tab of FIG. 13 and illustrates the clearance correction provided by the lug abutting the second tab.
Detailed Description
In most cases, the figures and the following description contain elements that are inherently deterministic. It is therefore useful not only to provide a better understanding of the present invention, but also to contribute to its definition where appropriate.
Furthermore, the invention relates to a seat height adjustment system 1, wherein the seat part frame (also called seat part chassis) has two flanges supported by a plurality of cross pieces of the frame.
Each flange has an inner side Ci facing the frame inner side and an outer side Ce facing the frame outer side.
Such a system allows the height of at least a portion of the chair to be adjusted relative to a fixed portion (the height being fixed), more particularly the seat portion of the chair and even the backrest of the chair.
To this end, the seat height adjustment system comprises a manual or motorized drive module 2, which is arranged in one of the two flanges of the seat part frame.
With the manual drive module, the module is provided on the outer side Ce of the seat so that the operator can access and operate the handle for operating the input device.
For motorized drive modules, the module may be disposed on the outside Ce (as shown on the right side of FIG. 1) or the inside Ci (not shown) of the flange.
The actuation system 2 can be manually actuated, comprising an irreversible adjustment mechanism, which, as shown on the left in fig. 1, comprises an input Oe which is pivoted relative to the support about an axis of rotation Y, resiliently biased towards a rest position N, and which is manually movable in a first direction within a first angular sector SI of the adjustment mechanism and in a second direction within a second angular sector SII of the adjustment mechanism.
Such an adjustment mechanism is configured to move the height adjustable portion of the seat upward when the input is moved in a first direction away from its rest position, and to move the height adjustable portion of the seat downward when the input is moved in a second direction away from the rest position.
Such an adjustment mechanism comprises an output member 20 mounted to pivot about a rotation axis and a drive and locking system configured, on the one hand, to ensure the drive of the output member by the input member when the input member is moved away from its rest position in a first direction within a first angular sector SI or in a second direction within a second angular Sector (SII), and, on the other hand, to lock the rotation of the output member when the input member is returned to its rest position N.
Such irreversible adjustment mechanisms are known to those skilled in the art and will therefore not be described in detail. For more details on the structure of the irreversible adjustment mechanism, the person skilled in the art can refer to the description of document FR 2,809,355a 1.
This irreversible adjustment mechanism allows the occupant to continuously raise the height adjustable portion of the seat by pump movement of the input in the first angular sector and to continuously lower the height adjustable portion of the seat by pump movement in the second angular sector.
The output member 20 typically comprises a shaft gear or the like disposed at the side of the seat to which the drive module is mounted, which meshes with a sector gear SD in the hinge connection. Alternatively, the shaft gear may be engaged with the rack (right).
Alternatively, the drive module 2 may be motorized and for this purpose comprise a geared motor M, which is schematically shown on the right in fig. 1.
Such an electric actuation system comprises:
-a reversible gear motor M ensuring that at least a part of the seat is electrically height-adjustable with respect to said fixed part;
an electrical control of the gear motor M configured to allow the occupant to adjust at least a portion of the seat up or down.
The output of the gear motor M typically comprises a shaft gear or the like disposed at the side of the seat to which the drive module is mounted, which engages the first rack.
Fig. 2 to 7 show a seat height adjustment system 1' known to the applicant, comprising:
a flange Fl of the seat frame having an inner side Ci and an outer side Ce;
-a housing 3' arranged inside the flange and fixed to the flange;
a drive module 2 'which is arranged outside the flange and is fixed to the flange, which has a rotatable output 20', which output 20 'protrudes through an opening of the flange and is accommodated in the compartment formed by the housing 3'.
The three components (flange, housing and drive module) are assembled in a specific order.
First, the housing 3 'is positioned on the flange Fl of the inner Ci by engaging the bosses BS in the calibrated openings of the flange, wherein the housing 3' is centered on the flange. During positioning, the tabs 32' Of the casing are inserted into the first holes Of1 Of the flange Fl. The shell is then secured to the flange by reverse folding the tabs on the outside of the flange.
In a second step, the drive module 2 ', which is of the irreversible adjustment mechanism type, is positioned outside the flange, while the tabs 21' of the drive module are inserted in the second holes of the flange, or even in the third hole of the casing.
As shown in fig. 5, according to the inventors ' study, there is still a gap between the fixing tabs 32 ' of the casing 3 ' and the holes of the flange through which these tabs pass, which would cause relative sliding between the casing and the flange in the event of an impact.
As shown in fig. 6, according to the inventors' study, there is still a clearance between the fixing tabs of the irreversible adjustment mechanism and the holes of the flange through which these tabs pass, which would cause relative sliding between the irreversible adjustment mechanism and the flange in the event of impact.
Further, according to the inventors' studies, the bosses of the housing that engage the aligned openings of the flange may disengage from the openings upon impact.
The present invention overcomes these disadvantages.
The invention relates to a seat height adjustment system 1 comprising:
a flange Fl of the seat frame, said flange having an inner side Ci and an outer side Ce;
a housing 3, arranged on a first side of the flange (inside or outside of the flange) and fixed to the flange;
a drive module 2, arranged on a second side opposite to the first side of the flange and fixed to the flange, having a rotatable output 20, which output 20 protrudes through an opening in the flange and is accommodated in the compartment formed by the housing 3.
According to the invention, in particular, the housing has a centering portion comprising at least one cylindrical portion 30, said at least one cylindrical portion 30 extending into the circular opening Ov of the flange Fl.
More specifically, the at least one cylindrical portion 30 extends through the circular opening of the flange from a first side of the flange (in particular the inner side Ci) to a second side of the flange, wherein the cylindrical portion 30 is radially deformed beyond the diameter of the circular opening, forming a stop edge 31.
As can be seen from the right-hand detailed view in fig. 10, the catch 31 engages with the flange of the edge of the circular opening on the second side (in particular on the outer side Ce), eliminating the gap between the cylindrical portion 30 and the circular opening Ov.
The conditioning system according to the invention can be obtained by implementing an assembly method comprising the following successive steps:
-/a/positioning the housing 3 on a flange (Fl) on a first side of the flange (flange inner Ci or outer Ce) and, starting from the first side, inserting the cylindrical portion 30 into the circular opening until the cylindrical portion 30 protrudes from a second side of the flange;
-/B/fixing the shell to the flange by radial deformation of the cylindrical portion until a stop edge 31 is obtained, the stop edge 31 engaging with the flange on the second side of the flange to eliminate the clearance between the cylindrical portion 30 and the circular opening Ov;
-C/positioning the drive module on the flange on the second side of the flange;
andD/fixing the drive module 2 to the flange.
The fixation step/B/is shown in FIG. 11. It will be noted that the material of the cylindrical portion is deformed radially from the second side (in this case the outer side Ce) using a pressing tool, so that the catch edge 31 is formed.
This can advantageously be achieved not only:
the cylindrical portion 30 is engaged to the second side (in particular as shown on the external side Ce, or on the internal side according to an example not shown) by the retaining lip 31, and the cylindrical portion 30 is locked in relation to the flange in the axial direction thereof in a washer-like manner on the first side (in particular as shown on the internal side Ci, or on the external side according to an example not shown) by the counter-support wall of the casing 3;
eliminating the (radial) gap between the cylindrical portion 30 and the circular opening.
The use of such a deformed cylindrical portion 30 in the circular hole advantageously eliminates slippage between the housing and the flange in the event of an impact.
The casing 3 may preferably comprise several cylindrical portions 30 housed in several circular openings Ov of the flange, said several cylindrical portions being respectively provided with several blocking edges 31, which blocking edges 31 engage on the second side of the flange (as shown on the outer side Ce, or on the inner side), eliminating the radial play as explained above.
The number of the plurality of cylindrical portions may in particular be three and is preferably distributed around the axis of the output 20 of the drive module 2.
According to an embodiment, the outer shell 3 has at least one folded tab 32 that extends into at least one first aperture Of1 Of the flange. This tab 32 Of the shell 3 is folded into the first aperture Of1 Of the flange, helping to retain the shell together with the cylindrical portion 30 on the flange. The tab abuts the second side of the flange.
In the case of a casing with tabs 32, the assembly method described above may provide:
in the step/a/Of positioning the casing on the flange, starting from a first side Of the flange (in particular the inner side Ci or the outer side Ce), the tab 32 Of the casing is inserted in the first hole Of1 Of the flange; and is
In the step/B/of fixing the casing to the flange, starting from the second side, the tab 32 of the casing is folded against the flange, the folded tab resting against the second side of the flange.
The folding of the tab 32 in step/B/may be performed using a variety of tools.
According to an embodiment, the drive module 2 may comprise at least one tab 21 folded into at least one second hole Of the flange Of2, and preferably, a plurality Of tabs 31 engaged in a plurality Of second holes Of2 Of the flange Fl.
In the case of a drive module with tab(s) 21, the assembly method may provide:
in step/C/, starting from the second side (in particular from the outer side Ce or optionally from the inner side Ci), the tab 21 Of the drive module is inserted into the at least one second hole Of 2;
in the step/D/of fixing the drive module to the flange, starting from the first side, the tabs of the drive module are folded back and brought to abut against the first side of the flange (directly or indirectly against the flange).
Preferably, the drive module may comprise a plurality of tabs 21, for example four tabs 21, to ensure the fixing of the module to the flange.
Advantageously, the at least one second aperture Of2 Of the flange through which the tab 21 Of the drive module passes may comprise a lug 4 Of the flange which constitutes an edge Of the second aperture Of2.
This lug 4 can advantageously be used to correct any play, said lug 4 abutting against the second tab 21 to eliminate the mating play between the tab 21 Of the drive module 2 and the second hole Of2 Of the flange.
In the case Of the second aperture Of2 having lugs 4 for correcting any clearance, a method Of assembly may be provided at step/D/, which may, after folding the tab 21 through the second aperture Of2, rest the lugs 4 Of the flange against the folded tab 21 until the mating clearance between the tab 21 Of the drive module 2 and the second aperture Of2 Of the flange is eliminated.
In fig. 13, the two tabs 21 Of the drive module 2 pass through two second holes Of2 on the left, seen from the inside Ci, the two holes Of2 each being provided with a lug 4 for correcting any play.
All or part Of the second aperture Of2 may be provided with this tab 4 for correcting any gaps.
The housing can have a wall that rests on the flange that has a third aperture Of3 and that passes through at least one second aperture Of2 Of the flange while passing through a third aperture Of3 Of the housing when the at least one tab 21 Of the drive module 2 is folded against the housing wall and the inside Of the flange Fl.
All or a portion Of tab 21 passing through second aperture Of2 may pass through third aperture Of3 before being folded over the enclosure wall.
In the case Of a housing with a third aperture Of3, in step/C/, the tab 21 Of the drive module 2 passes through the second aperture Of2 Of the flange while passing through the third aperture Of3 Of the housing, and in step/D/, the tab 21 is folded against the housing wall and the folded tab is abutted against the housing wall.
According to an embodiment, some tab(s) 21 having lugs pass through the second aperture Of2 to correct any gaps, while other tab(s) 21 may pass through the third aperture Of3 Of the case simultaneously before being folded over the case.
For example, in fig. 13, the two tabs 21 on the left that pass through the second aperture Of2 are associated with two lugs 4 for correcting any gaps, while the two tabs 21 on the right can pass through a third aperture Of3 in the wall Of the case 2 at the same time.
Advantages of
An advantage of the seat height adjustment system of the present invention is that it may provide a higher safety in the event of an impact by avoiding or at least reducing the risk of the housing or even the drive module sliding relative to the flange. The teeth of the shaft gear of the output member and the teeth of the sector gear (or rack) can be in contact with each other reliably (without play) at all times, so that breakage of the teeth at the time of impact is avoided.
According to at least one advantageous embodiment, after insertion of the cylindrical portion into the circular opening, an assembly between the flange and the drive module/housing assembly is obtained, which essentially consists of: a metal plate variant of the cylindrical portion and after insertion of the plurality of tabs into the first, second or even third holes; bending the metal plate of the lug of the shell main body; or bending tabs of the drive module mounting plate. Thus, additional fasteners, such as bolts or the like, may advantageously not be used.
List of reference numerals
Fl. the flanges of the two-way valve,
ci, Ce. are the inner and outer sides of the flange respectively,
Prior Art
-1' a seat height adjustment system,
-2' of a drive module,
-3' of the outer shell,
invention (I)Content of (2)
-1. a seat height adjustment system,
-2. a drive module,
20. an output member (in particular a toothed shaft gear),
-21. tabs (drive module),
-22. a guide shoulder,
-3. a housing,
-30. a cylindrical portion,
-31. a stop edge,
-32. tabs (outer shells),
-33. guide opening (shaft gear),
-4. lugs (to correct any play Of the second hole Of2),
off 1. a first hole (located in the flange through which the tab 32 passes),
second hole (located in the flange and crossed by tab 21),
off 3. third hole (located in the housing crossed by tab 21).

Claims (16)

1. Seat height adjustment system (1), comprising:
-a flange (Fl) of the seat frame, the flange having an inner side (Ci) and an outer side (Ce);
-a housing (3) arranged on a first side of the flange, fixed to the flange, the first side being an inner side (Ci) or an outer side (Ce);
-a drive module (2) arranged on a second side of the flange opposite to the first side, fixed to the flange, the second side being an outer side (Ce) or an inner side (Ci), having a rotatable output (20), the output (20) protruding through an opening of the flange and being housed in a compartment formed by the housing (3);
and wherein the housing has a centering portion comprising at least one cylindrical portion (30), the at least one cylindrical portion (30) extending into a circular opening (Ov) of the flange (Fl), the at least one cylindrical portion (30) extending through the circular opening of the flange from a first side of the flange to a second side of the flange, wherein the cylindrical portion (30) is radially deformed to form a catch (31) beyond the diameter of the circular opening, the catch catching on the second side of the flange a flange on the edge of the circular opening to eliminate a gap between the cylindrical portion (30) and the circular opening (Ov).
2. The seat height adjustment system according to claim 1, characterized in that the housing (3) has at least one fold tab (32) which extends into at least one first aperture (Of1) Of the flange and abuts against a second side Of the flange.
3. The seat height adjustment system according to claim 1 or 2, characterized in that the drive module (2) comprises at least one tab (21) which is folded into at least one second hole (Of2) Of the flange, rests on a first side Of the flange, and rests directly or indirectly on the flange.
4. Seat height adjustment system according to claim 3, characterized in that the at least one second hole (Of2) Of the flange through which the tab (21) Of the drive module (2) passes comprises a lug (4) Of the flange, the lug (4) constituting an edge Of the second hole (Of2), the lug (4) being used to correct any play, the lug (4) resting against the second tab (21) to eliminate the mating play between the tab (21) Of the drive module (2) and the second hole (Of2) Of the flange.
5. The seat height adjustment system according to any Of claims 3 to 4, characterized in that the housing (3) has a wall resting on the flange, the wall having a third aperture (Of3), and wherein the at least one tab (21) Of the drive module (2) passing through the at least one second aperture (Of2) Of the flange simultaneously passes through the third aperture (Of3) Of the housing (3) and abuts against the wall Of the housing (3) at the first side Of the flange (Fl).
6. Seat height adjustment system according to one of claims 1 to 5, wherein the output (20) is a shaft gear which rotates about its rotational axis, the shaft gear having at a distal end a guide shoulder (22) which is received in a guide opening (33) of the housing (3), the guide shoulder (22) of the shaft gear and the guide opening (33) ensuring the rotational guidance of the shaft gear relative to the housing.
7. Seat height adjustment system according to claim 6, wherein the shaft gear has peripheral milled teeth meshing with a sector gear (SD) integrated with an articulation, the articulation connecting frame being variable in height and a portion of the seat being fixed in height.
8. The seat height adjustment system of claim 6, wherein the shaft gear has peripheral milled teeth that mesh with the rack gear.
9. Seat height adjustment system according to any of claims 1 to 8, wherein the at least one cylindrical part comprises a number of cylindrical parts (30) received in a number of circular openings of the flange, the cylindrical parts being provided with respective retaining edges (31) to ensure that they snap over the flange on the second side of the flange.
10. The seat height adjustment system according to any of claims 1 to 9, wherein the drive module (2) is an irreversible manual adjustment mechanism comprising an input (Oe) which is usable from a first side of a flange formed by the outer side (Ce), is mounted to pivot and resiliently bias towards a rest position (N) with respect to an axis of rotation Y, is manually movable in a first direction within a first angular Sector (SI) of the adjustment mechanism, and is manually movable in a second direction within a second angular Sector (SII) of the adjustment mechanism, and wherein the irreversible adjustment mechanism is configured to move the height-adjustable frame upwards when the input is moved away from its rest position (N) in the first direction, and is configured to move the height-adjustable frame upwards when the input is moved away from its rest position in the second direction, moving the height adjustable part of the seat downwards, the adjustment mechanism comprising an output (20) mounted to pivot about the swivel axis and a drive and lock system configured to ensure, on the one hand, the drive of the output by the input when the input is away from its rest position in the first direction within the first angular Sector (SI) or in the second direction within the second angular Sector (SII), and on the other hand to lock the rotation of the output when the input is returned to its rest position (N).
11. The seat height adjustment system according to one of claims 1 to 9, wherein the drive module (2) is motorized, comprising an irreversible gear motor (M) ensuring motorized height adjustment of at least a part of the seat relative to the fixed part, the gear motor driving the output (20) in one direction or the other,
wherein the second side of the flange, on which the drive module (2) is fixed, is the outer side (Ce) or the inner side (Ci) of the flange.
12. Method of assembling a seat height adjustment system according to any of claims 1 to 11, comprising the following successive steps:
-a/positioning the housing (3) on a flange (Fl) on a first side of the flange, the first side being an inner side (Ci) or an outer side (Ce) of the flange, and inserting a cylindrical portion (30) into the circular opening starting from the first side until the cylindrical portion (30) protrudes from a second side of the flange;
-B/fixing the shell to the flange by radial deformation of the cylindrical portion until a stop edge (31) is obtained, said stop edge (31) engaging with the flange on the second side of the flange to eliminate the gap between the cylindrical portion (30) and the circular opening (Ov);
-C/positioning the drive module (2) on a flange on a second side of the flange;
-D/fixing the drive module (2) on the flange (Fl).
13. The method of assembling a seat height adjustment system according to claim 12, the seat height adjustment system being the seat height adjustment system according to claim 2, wherein:
-in the step/a/Of positioning the casing on the flange, starting from the first side, inserting a tab (32) Of the casing in a first hole (Of1) Of the flange; and is
-in the step/B/of fixing the casing to the flange, folding a tab (32) of the casing starting from the second side and abutting the tab against the second side of the flange.
14. The method of assembling a seat height adjustment system according to claim 12 or 13, the seat height adjustment system being the seat height adjustment system according to claim 3, wherein:
-inserting, in a step/C, a tab (21) Of the drive module in the at least one second hole (Of2) starting from a second side being the outer side (Ce) or inner side (Ci);
-in the step of fixing the drive module on the flange, folding the tab of the drive module starting from the first side and then abutting the folded tab against the first side of the flange, directly or indirectly against the flange.
15. Method Of assembling a seat height adjustment system according to claim 14, which is a seat height adjustment system according to claim 4, characterized in that in step/D/after folding the tab (21) passing through the second hole (Of2), the lug (4) Of the flange is brought to bear against the folded tab (21) until the mating gap between the tab (21) Of the drive module and the second hole (Of2) Of the flange is eliminated.
16. Method Of assembling a seat height adjustment system according to claim 14, which is a seat height adjustment system according to claim 5, characterized in that in step/C/, the tab (21) Of the drive module (2) passing through the second hole (Of2) Of the flange simultaneously passes through the third hole (Of3) Of the housing, and the tab (21) is folded against the wall Of the housing in step/D/, and the tab abuts against the wall Of the housing.
CN202210007903.7A 2021-01-05 2022-01-05 Seat height adjustment system Pending CN114714998A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2100070 2021-01-05
FR2100070A FR3118611B1 (en) 2021-01-05 2021-01-05 Seat height adjustment system

Publications (1)

Publication Number Publication Date
CN114714998A true CN114714998A (en) 2022-07-08

Family

ID=74669135

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210007903.7A Pending CN114714998A (en) 2021-01-05 2022-01-05 Seat height adjustment system

Country Status (2)

Country Link
CN (1) CN114714998A (en)
FR (1) FR3118611B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2809355B1 (en) 2000-05-24 2002-09-27 Faure Bertrand Equipements Sa IRREVERSIBLE ADJUSTMENT MECHANISM
JP2008075766A (en) * 2006-09-21 2008-04-03 Ntn Corp Clutch unit
DE102015223485B4 (en) * 2015-11-26 2022-05-05 Keiper Seating Mechanisms Co., Ltd. HEIGHT ADJUSTER FOR A VEHICLE SEAT, VEHICLE SEAT
DE102018110525A1 (en) * 2018-05-02 2019-11-07 Faurecia Autositze Gmbh Method for mounting a transmission component of a seat height adjustment

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FR3118611A1 (en) 2022-07-08

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