EP3765330A1

EP3765330A1 - Seat depth adjustment for a motor vehicle seat that can be adjusted in the seat depth thereof manually or by motor

Info

Publication number: EP3765330A1
Application number: EP19710677.6A
Authority: EP
Inventors: Hans Burckhard Becker
Original assignee: Fisher Dynamics Germany GmbH
Current assignee: Fisher Dynamics Germany GmbH
Priority date: 2018-03-16
Filing date: 2019-03-12
Publication date: 2021-01-20
Also published as: CN112088108A; WO2019175150A1; US20210252998A1

Abstract

The invention relates to a seat depth adjustment device for a vehicle seat that can be adjusted in the seat depth thereof electrically by means of an electric motor (68) or manually by means of an operating lever (44), which seat depth adjustment device has: a preferably single-piece support plate (20) made of plastic, which comprises (a) a support part (22), which extends in the sliding direction (28), (b) a front apron (24), (c) two guides (30), which extend parallel to each other in the sliding direction (28) and are arranged at a distance from each other and are formed in the support part (22), (d) a slot (38) for a detent spring (40), which slot is formed in the support part (22) and extends perpendicularly to the sliding direction (28), and (e) a space (52) for the accommodation of at least a part of the operating lever (44) or of the electric motor (68) and for the fastening thereof, which space is open downward and is delimited by the support part (22) and by the front apron (24); and a preferably single-piece, metal base plate (26), which comprises guide means (32) matched to the guides (30), detent recesses (42) arranged one following the other in the sliding direction (28), and fasteners (72) for fastening the base plate to a vehicle seat.

Description

Seat depth adjustment for a manual or motorized seat depth adjustable motor vehicle seat

The invention relates to a seat depth adjustment of a motor vehicle seat, which has a seating area, which is connected to a base plate of the seat depth adjustment, and with a support plate which is adjustable relative to the base plate in a shift direction in different positions, wherein the support plate the Front edge of the seating area forms.

In the prior art adjusting device according to DE 198 26 823 CI drives an electric motor gears, which are mounted directly on the support plate. This can be adjusted relative to a seat frame in which it is guided laterally.

In the case of the motor vehicle seat previously known from DE 196 28 381 A1, a support plate is inserted in a U-shaped recess of the seat part which is open towards the front. The longitudinal guide is formed by a tube and a sliding sleeve. A determination between the support plate and seat part is achieved by a coil spring and is done with manual operation.

DE 698 27 303 T2 discloses a vehicle seat adjustable in its seat depth, in which a front seat part is adjusted by means of an electric motor relative to a rear seat part. In the case of the vehicle seat previously known from DE 199 13 503 A1, the seat area likewise has a front section and a rear section which can be positioned at different distances from one another by means of a manually operated adjustment device, so that the seat depth can be adjusted.

A disadvantage of the known adjusting device in this type is that they are intended exclusively for manual or motor training. If both manual and motor training is desired, the designs are significantly different and the proportion of common parts for both forms is very low. This they the invention as a disadvantage. Its purpose is to use as many common parts as possible for both trainings. Accordingly, it is an object of the invention to avoid the disadvantages of the previously known adjusting devices and to specify a seat depth adjustment device which uses as many identical parts for both embodiments and thus offers the possibility that even subsequently the one training is converted into the other training can.

This object is achieved by a seat depth adjustment device for a vehicle seat which is electrically adjustable in its seat depth in an adjustment direction by means of an electric motor or manually by means of an operating lever

(b) a front apron extending transversely to the direction of displacement and pointing downwards from a front edge of the support member, (c) two parallel (d) a slot formed in the support member, extending transversely to the direction of displacement, and (e) a downwardly open space bounded by the support member and the front apron for receiving at least a portion of the housing Operating lever or the electric motor and its attachment points up, and

- With a one-piece, metallic base plate, which has the guides adapted guide means, in the direction of displacement successively arranged Rastausneh- and fastening means.

In this adjustment, both the support plate and the base plate are each used identically for both training, so are suitable for both training and prepared accordingly. As a result, one or the other feature is not required for the formation, for example, the slot is not required for the motorized training. However, it is always the case that the feature not required in the other training does not bother.

In the assembled state, the two guides of the support plate engage in the guide means of the base plate. As a result, a relative movement between the support plate and the base plate is achieved and fixed exclusively in the direction of displacement. The displacement in the direction of displacement is limited in both directions by a stop. This is the way to move forward characterized in that the front apron of the support plate comes to stop against the front guides of the base plate.

The recesses of the guide means are preferably open at the top. They are only used for manual training. Preferably, the guide means of the base plate are upwardly facing a central region of the base plate. This results in a free space between the support plate and the base plate, which is accessible only in the direction of displacement. Laterally, it is limited by the engaged guide means and guides. The free space is used for receiving at least a portion of the operating lever or a spindle of a motor drive. This has a motor-rotatably driven spindle and a spindle nut engaged with this, the latter is held on the base plate.

Preferably, the guides push forward in the direction of displacement against the front apron, in particular they are connected at the front with this. As a result, the limitation of the displacement path is reached forward. Preferably, two bearing areas for the pivot axis of the operating lever are provided on the lower side of the supporting part. They each take on an end portion of the pivot axis. It is advantageous if each storage area is formed in each case by a recess and a resilient tongue located in the opening. When the end portions of the pivot axis are pressed into the recess, the tongues spring to the side until the end portions are in the recess and the tongues close the access to the recess again, so that the return path is locked.

Preferably, the guide means in the direction of displacement are shorter than the guides, in particular they are shorter by at least 30%. Regardless of the setting position of the support plate relative to the base plate, the guide means are preferably completely within the guides at least over 80% of their length, preferably at least over 90% of their length. As a result, a support of the support plate over the entire length of the guide means is achieved. The base plate preferably has a bay located between the guide means at its front end. This bay can accommodate either the electric motor or the control lever.

Preferably, the support plate has two supports arranged in the slot, each located between the longitudinal center of the slot and an end portion of the detent spring. On these supports the detent spring lies on. When the center portion of the detent spring is pressed down by the operating lever, the free ends of the detent springs move upward. These free ends are normally engaged with detent recesses formed in the base plate and open at the top. When the free ends are moved up, they come out of the recesses. Then it is possible to adjust the seat depth.

Preferably, the slot has a pocket located centrally between the guides, which is a recess of the slot. This bulge is directed backwards. The pocket preferably receives a nose of the operating lever, which moves up and down within the pocket when the operating lever is actuated. Normally, the operating lever is under the action of the detent spring against a stop of the support member. The detent spring is thus used for several tasks. It serves to adjust in the direction of displacement by engaging in detent recesses. The intervention is automatic, during the displacement, the ends of the detent spring slide over the guide means and automatically engage in a recess, as long as this is not prevented by the operating lever.

Preferably, the control lever has a U-shaped area with a front leg located in front of the front apron, with a base located below the front apron, and a rear leg located behind the front apron. The control lever is thus shaped so that it engages under the front apron, in other words, the bottom is guided around the front apron. His front thigh is in front of the front apron. Preferably, the operating lever further has a flange adjoining the upper end of the rear leg which is located in the space between the support plate and the base part. This flange carries the pivot axis of the operating lever. From the flange are two end portions of the pivot axis laterally away. These End areas or stubs are each located in one of the storage areas. The nose of the flange runs parallel to the direction of movement and reaches into the pocket of the slot. It engages through a central region of the detent spring, thereby it takes with the movements of the operating lever with the center of the detent spring. Specifically, she pushes it down when the front thigh is pulled up. Normally, the detent spring presses the operating lever against a stop. As a result, the operating lever is held in its normal position. The operating lever is also referred to as a handle. He has a handle at the upper end of the front thigh.

In a Sitztiefenverstellvorrichtung with motor actuation, the electric motor to a transmission which is connected to a spindle. This is located in the space between the support plate and the base plate. It extends in the direction of displacement. It is in engagement with a spindle nut, which is connected to the base plate.

Further advantages and features of the invention will become apparent from the remaining claims and the following description of two non-limiting exemplary embodiments, which are explained in more detail with reference to the drawings. The figures of this drawing show the following:

1 shows an exploded view of a manual seat depth adjustment device, showing a support plate in half section, section line in the direction of displacement, FIG.

FIG. 2 shows a perspective view of the parts shown in FIG. 1, now in the assembled state,

Figure 3 is a perspective view similar to Figure 2, but now is the

Support plate in half section, section line transverse to the displacement direction, shown,

Figure 4 is a perspective view of a view obliquely from below the

Support plate

Figure 5 is a perspective view similar to Figure 2, but now for a motorized seat depth adjustment.

For the description, a right-handed, orthogonal x, y, z coordinate system is used. The x-axis lies in the direction of displacement, the positive x-axis points in the direction of increasing seat surface. The y-axis lies in the plane of the seat surface, the z-axis points from the plane of the seat perpendicular to the top. This coordinate system essentially corresponds to the coordinate system conventionally used in motor vehicle technology and is identical to this if the xy plane is parallel to the road plane.

In the figures 1 to 4, the manual execution is shown. The adjusting device has a one-piece support plate 20 made of plastic. This support plate 20 consists of a in the x-y plane extending support member 22 and a front edge attached to the front apron 24. The adjustment device further has a base plate 26, which is preferably in one piece and preferably me tallisch. The support member 22 has two parallel to each other in a displacement direction 28 extending, spaced apart guides 30. They are arranged on the underside of the support member 22. According to them, the base plate 26 has guide means 32 which, together with a respective guide 30, form a longitudinal guide. As a result, the support member 22 relative to the seat-fixed base plate 26 are moved only in the direction of displacement 28.

The guide means 32 extend over only a portion of the length of the two guides 30. Over the entire permissible adjustment path, the guide means 32 always remain at least 70% in the region of the guides 30. The displacement movement forwards, in the positive x-direction , is limited by the fact that the guides 30 open into the front apron 24.

The front apron 24 extends substantially in the y-z plane, it is slightly curved about an axis parallel to the z-direction axis. It extends from a front edge of the support member 22 down. The front apron 24 is stiffened by ribs 34. The support member 22 is striped by square-shaped webs 36 located at its top. They run obliquely to the x- and also to the y-axis. They are at least twice as high in the z direction near the front edge as at the rear end of the support part 22.

The support member 22 has a slot 38 extending in the y-axis direction. It extends from the center of the support member 22 in both y-axis directions to each of the guides 30 and terminates within the guides 30, see FIG Displacement direction 28, the slot 38 is located approximately in the middle of the support member 22. The slot 38 provides space for a detent spring 40, which is needed only for manual execution. It is designed as a two-legged spring, the two legs extend from an annular central region.

The guide means 32 have upwardly, in the positive z-direction open Rastaus- recesses 42. which are arranged in the direction of displacement 28 one behind the other, the embodiment shows five such recesses 42. in the normal mal¬, ie the locking position, each engages a free end of a Schenkels the detent spring 40 in a recess 42. In this case, it is guided in the immediate vicinity of the recess 42 in the slot 38, which acts here as a shear window. As a result, the load on the leg in an accident or the like is low.

The manual version has an operating lever 44. It has (i) a U-shaped portion with a front leg 46 located in front of the front apron 24 and carrying a handle at its upper end, a rear leg 48 located behind the front apron 24 is located and a base that connects these two legs 46, 48 together and is located below the lower edge of the front apron 24. It has (ii) a flange 50 which attaches to the upper end of the rear leg 48 and extends rearwardly, generally in the direction of the negative x-axis. This flange 50 is located in a space 52 between the support part 22 and the base plate 26. This space 52 is accessible only in the displacement direction 28. He has a clear height of a minimum of one to a maximum of 8 cm.

The flange 50 carries a pivot axis 54 which extends in the y direction. From her are two end portions laterally away, which are stored in storage areas 56 of the support member 22. They can be clipped into these bearing areas 56 by a movement in the positive x-direction. Furthermore, the flange 50 has a nose 58 projecting in a negative x-direction. It passes through the annular center region of the detent spring 40 and takes it along when the operating lever 44 is actuated. This movement takes place essentially in the z-direction. In its longitudinal center of the slot 38 has a pocket which receives the free end of the nose 58. The support part 22 forms a support 60 within the slot 38 for each leg of the detent spring 40. Each leg is approximately on its longitudinal center on a support 60, it is located above the support 60. The two legs of the detent spring 40 are at an angle to each other, which is smaller than 180 °, preferably about 150 °. As a result, the nose 58 is resiliently biased upward in a positive z-direction and the flange 50 rests against the support part 22, so that the normal position of the operating lever 44 is predetermined. The detent spring 40 thus keeps the operating lever 44 elastically in its normal position.

When the operating lever 44 is actuated, thereby the front leg 46 is pulled upward, the nose 58 and thus the annular central region move downwards. The legs are pressed more strongly on the support 60. Their free ends move upwards. As a result, they are released from the latching recesses 42. An adjustment can be made.

The base plate 26 has a bay 62 located between the guide means 32 at its front edge. A partial area of the operating lever 44 is located in this bay 62, in particular the rear leg 48 and the flange 50 are at least partially located there 62 is also a recess 64 of the support member 22 through which space is created upwards. Projections 66 of the flange 50 come to rest on their lower surface, they limit the pivoting travel of the operating lever 44 into the normal position.

In the motor embodiment shown in Figure 5, an electric motor 68 is housed in the receiving space below the recess 64 and in the bay 62 and connected to the support plate 20. The parts operating lever 44 and detent spring 40 are no longer available, but the other parts. In other words, the components shown in FIG. 1 in the lower partial image do not exist, but only the components shown in the two upper partial images. The electric motor 68 has a cylindrical motor housing, the cylinder axis extends in the y direction. It is located approximately at the level of a central region 70 of the base plate 26. This is substantially planar. In it fastening means 72 are provided, realized here by holes, engage in the screws. About this attachment means 72, the connection is made with a seat portion of a motor vehicle seat, not shown here, both are after in the prior art. The middle area 70 is lowered by a few centimeters, for example one to 4 cm, downwards relative to the guide means 32, as a result of which the space 52 is larger than without this lowering.

The electric motor 68 is implemented according to the prior art. The electric motor 68 is located in the immediate vicinity of the front apron 24. It has a gear that is connected to a spindle 74. This extends in the direction of displacement 28. It is located at least partially in the space 52. It is in engagement with a spindle nut 76, which is held on a web portion 26 connected to the base plate 37. The spindle 74 is located in the plane in which guide 30 and guide means 32 engage with one another.

The support plate 20 is substantially symmetrical to the x-z plane. Therefore, it is sufficient, for example, in Figure 1, only one half to show. Likewise, the base plate 26 is symmetrical to the said plane. Also, the operating lever 44 and the detent spring 40 are symmetrical in this way. The space 52 is preferably also bounded by the front apron 24.

The seat depth adjustment device for a seat depth that is electrically adjustable by means of an electric motor 68 or manually by means of an operating lever 44 has a preferably one-piece support plate 20 made of plastic, which a) a support member 22 which extends in the direction of displacement 28, b) a front Apron 24, c) two mutually parallel in the direction 28 extending, spaced guides 30, which are formed in the support member 22, d) formed in the support member 22, transversely to the direction 28 extending slot 38 for a detent spring 40th and e) has a downwardly open space 52 bounded by the support part 22 and the front apron 24 for receiving at least part of the control lever 44 or the electric motor 68 and its attachment, and a preferably one-piece metallic base plate 26, the guiding means 32 adapted to the guides 30, one behind the other in the direction of displacement 28 eordnete locking recesses 42 and fastening means 72 has for their attachment to a vehicle seat.

Terms such as essentially, preferably and the like as well as possibly possibly to be understood as inaccurate statements are to be understood as meaning that a deviation of plus or minus 5%, preferably plus and minus 2%, and in particular plus minus one percent of normal value is possible. The Applicant reserves the right to combine any features and also sub-features from the claims and / or any features and also sub-features from a set of the description in any manner with other features, sub-features or sub-features, even outside the features of independent claims.

In the different figures, equivalent parts are always provided with the same reference numerals with respect to their function, so that these are usually described only once.

LIST OF REFERENCE NUMBERS

20 support plate

22 supporting part

24 Front bumper 26 Base plate

28 shift direction 30 guide

32 guide means 34 rib

36 footbridge

37 web part

38 slot

40 detent spring

42 locking recess 44 operating lever 46 front leg 48 rear leg 50 flange

52 room

54 Swivel axis 56 Bearing area 58 Nose

60 support

62 bay

64 recess 66 projection

68 Electric motor 70 Middle section 72 Fasteners 74 Spindle

76 spindle nut

Claims

claims

1. seat depth adjustment device for an in his seat depth in an adjustment direction electrically by means of an electric motor (68) or manually by means of an operating lever (44) adjustable vehicle seat

- With a one-piece support plate (20) made of plastic, which (a) a support member (22) extending in the direction of displacement (28), (b) a front apron (24) which extends transversely to the direction of displacement (28) and from a front edge of the support part (22) pointing downwards, (c) two spaced-apart guides (30) running parallel to one another in the displacement direction (28) and formed in the support part (22),

(D) a in the support member (22) formed transversely to the direction of displacement (28) extending slot (38) for a detent spring (40) and (e) a downwardly open from the support member (22) and the front apron (24) limited Having space (52) for receiving at least a portion of the operating lever (44) or the electric motor (68) and its attachment, and

- With a one-piece, metallic base plate (26), the guides (30) adapted guide means (32) in the direction of displacement (28) arranged behind each other recesses (42) and fastening means (72) for their attachment to a vehicle seat.

2. Sitztiefenverstellvorrichtung according to claim 1, characterized in that the guides (30) in the displacement direction (28) forward against the front apron (24) abut, in particular front are connected to this.

3. Sitztiefenverstellvorrichtung according to any one of the preceding claims, characterized in that on the underside of the support member (22) has two bearing portions (56) for receiving a pivot axis (54) of the operating lever (44) are provided.

4. Sitztiefenverstellvorrichtung according to any one of the preceding claims, characterized in that the guide means (32) are shorter than the guides (30) and regardless of the setting position of the support plate (20) relative to the base plate (26), the guide means (32) itself zumin- least over 80% of its length, preferably at least over 90% of its length within the guides (30).

5. Sitztiefenverstellvorrichtung according to any one of the preceding claims, characterized in that the base plate (26) at its front end between the guide means (32) located bay (62) has, and that in this bay (62) of Electric motor (68) or the operating lever (44) is located.

6. Sitztiefenverstellvorrichtung according to any one of the preceding claims, characterized in that the support plate (20) has two in the slot (38) arranged abutments (60), each between the longitudinal center of the slot (38) and an end portion of the slot (38). 38).

7. Sitztiefenverstellvorrichtung according to any one of the preceding claims, characterized in that the latching recesses (42) in the guides (30) are formed and are preferably open at the top.

8. Sitztiefenverstellvorrichtung according to any one of the preceding claims, characterized in that the slot (38) has a centrally located between the guides (30) located pocket, which is a bulge of the slot (38).

9. Sitztiefenverstellvorrichtung with manual operation and according to one of the preceding claims, characterized in that the detent spring (40) is a two-armed leg spring, on the one hand with the Rastaus- recesses (42) cooperates and on the other hand, the operating lever (44) resiliently biased to a normal position

10. Sitztiefenverstellvorrichtung according to the preceding claim,

characterized in that the operating lever (44) has a U-shaped area with a front leg located in front of the front apron (24), with a base located below the front apron (24), and with a rear leg, which is located behind the front apron (24) has.

11. Sitztiefenverstellvorrichtung according to claim 10, characterized in that the operating lever (44) further comprises a subsequent to the upper end of the rear leg flange (50) in the space (52) between the support plate (20) and the Base member which carries the pivot axis (54), projecting from the two stubs laterally from the flange (50), and carries a parallel to the displacement direction (28) extending nose, which extends freely into the slot (38) and a Center region (70) of the detent spring (40) passes through.

12. Sitztiefenverstellvorrichtung according to any one of claims 9 to 11, characterized in that the flange (50) has bumps, which come into contact with the support member (22), and that this contact limits the pivoting range of the operating lever (44).

13. Sitztiefenverstellvorrichtung with motorized operation and according to one of claims 1 to 8, characterized in that the electric motor has a gear which is connected to a spindle (74), that the spindle (74) in the space (52) between the support plate (20) and the base plate (26) and extending in the direction of displacement (28), and that a spindle nut (76) is connected to the base plate (26) and with the spindle (74) is engaged.

14. Sitztiefenverstellvorrichtung according to claim 13, characterized in that the electric motor is in the bay (62).