CN114514142B

CN114514142B - Vehicle seat

Info

Publication number: CN114514142B
Application number: CN202080065345.9A
Authority: CN
Inventors: 阿恩·格罗; 保罗·哈内菲尔德; 彼得·米勒; 沃尔克·温德克
Original assignee: Keiper Seating Mechanisms Co Ltd
Current assignee: Keiper Seating Mechanisms Co Ltd
Priority date: 2019-09-23
Filing date: 2020-09-23
Publication date: 2024-06-14
Anticipated expiration: 2040-09-23
Also published as: WO2021058499A1; CN114514142A

Abstract

The invention relates to a vehicle seat (100) having a seat structure (102), in particular a backrest structure, and having a locking device (104) for locking the seat structure (102) to a vehicle structure or to another seat structure, wherein the locking device (104) can be unlocked by a drive device, wherein for unlocking the locking device (104) the drive device can be coupled with an unlocking lever (106) of the locking device (104) by a clutch device (1) such that a driving movement of the drive device can be converted into an unlocking movement of the unlocking lever (106), wherein the clutch device (1) is decoupled from the unlocking lever (106) immediately after unlocking the unlocking device (104).

Description

Vehicle seat

Technical Field

The invention relates to a vehicle seat having a seat structure, in particular a backrest structure, and having a locking device for locking the seat structure to the vehicle structure or to another seat structure, wherein the locking device can be unlocked by means of a drive device, wherein the drive device can be coupled to an unlocking lever of the locking device by means of a clutch device in order to unlock the locking device, such that a driving movement of the drive device can be converted into an unlocking movement of the unlocking lever.

Background

Known vehicle seats have various forms of locking devices. The locking device may be used in other aspects of the vehicle such as in a vehicle door. The main task of the known locking devices is, for example, to be able to produce various different adjustment functions of the vehicle seat (for example to fold the rear seat back to enlarge the trunk space) or to be able to release the vehicle seat from the vehicle floor and to remove the vehicle seat.

Such locking means comprise a fixed point locker. These fixed point locks are characterized in that the locking unit locks only in one position on the seat and/or backrest and thus secures the seat and/or backrest relative to the adjacent components, typically relative to the vehicle. These locking devices, such as rotary latch locks, are sometimes referred to as locks or latches and are commonly used in foldable backrests for expanding luggage space. The locking unit is mostly arranged in the backrest. Other applications are locking of the detachable seat on the vehicle floor, and locking in the seat in a flexible seating arrangement.

The operation of the locking device is mostly performed manually (manual operation). The operating unit of the locking device can be located in different positions separately from the locking device, depending on the installation space situation and requirements. The force is then usually transmitted from the operating unit to the locking device via a bowden cable. The seat user signals accordingly and at the same time provides the necessary force to unlock the locking device. The operating force can sometimes be increased significantly, and in particular in the case of bowden cables.

In order to improve comfort, an electric operation may be used in addition to the manual operation. In these cases, only the release instruction needs to be issued by the user. The force required is then generated by an actuator which thus opens the locking unit.

WO 2012/104207 A1, for example, discloses an actuator by means of which, for example, the locking device known from WO 2012/152361 A1 can be unlocked.

Disclosure of Invention

The object of the invention is to improve a vehicle seat with a locking device of the type mentioned at the outset.

According to the invention, this object is achieved by a vehicle seat having a seat structure, in particular a backrest structure, and having a locking device for locking the seat structure to the vehicle structure or to another seat structure, wherein the locking device can be unlocked by means of a drive device, wherein the drive device can be coupled to an unlocking lever of the locking device by means of a clutch device in order to unlock the locking device, such that a driving movement of the drive device can be converted into an unlocking movement of the unlocking lever, wherein the clutch device is separated from the unlocking lever immediately after unlocking of the locking device.

The clutch device immediately separates the driving device from the unlocking lever after the clutch device is unlocked, so that the unlocking lever can idle. Thus, the operation lever is prevented from being pulled suddenly during the closing of the locking device to possibly damage the driving device.

By separating the drive device from the unlocking lever, the unlocking lever can be made to freewheel, wherein the freewheel of the unlocking lever enables the locking device to be locked again.

Advantageous embodiments that can be used individually or in combination with one another are the subject matter of the dependent claims.

In the idle movement of the unlocking lever, the locking device can be locked again. The clutch device may be capable of being shifted to a state in which the unlocking lever is separated from the driving device under the forced control immediately after the unlocking of the locking device.

The clutch device may have a wrap spring clutch. The clutch device may have a clutch shaft. The clutch device may have a clutch base. The clutch device may have a clutch core. The clutch base and the clutch core may be integrally formed. The clutch base and the clutch core may be mounted on the clutch shaft in a rotationally fixed manner. The clutch base and the clutch core may be rotatably supported on the clutch shaft. The clutch base may have external teeth.

The drive device may have a drive shaft. The drive shaft may be integrally formed with the clutch shaft. The drive shaft may have a drive pinion. The drive pinion may be meshed with external teeth of the clutch base. The drive pinion and the external teeth of the clutch base may constitute a reduction gear. The drive pinion and the external teeth of the clutch base may constitute a step-up gear.

The clutch device may have an elastic element. The elastic element may be a wrap spring. The elastic element may be a torsion spring. The elastic element may have axially protruding legs at both ends. The elastic element may be arranged coaxially with the clutch core. The first leg of the resilient element may be secured in a bore of the clutch base. The second leg of the resilient element may be secured in a hole of the coupling wheel. In the relaxed state of the elastic element, a gap may be provided between the elastic element and the clutch core.

The clutch device may have a coupling wheel. The coupling wheel may be rotatably supported on the clutch shaft. The coupling wheel may have a follower pin, in particular in a radially outer region. The follower pin may protrude perpendicularly from the coupling wheel.

The clutch device may have a coupling rod. The coupling rod may have a long hole, in particular in the region of the first end. The coupling rod may be connected with a follower pin. The follower pin can be guided displaceably in a long hole of the coupling rod. At the end of the coupling rod opposite the slot, in particular at the second end, a connecting hole for the articulated connection to a locking device, in particular an unlocking lever of the locking device, can be provided.

Drawings

The invention is described in detail below with the aid of an advantageous embodiment and a variant of this embodiment shown in the drawings. The present invention is not limited to this embodiment nor to variations of this embodiment. In the drawings:

Figure 1 shows a schematic perspective view of a clutch device of a vehicle seat according to the invention,

Figure 2 shows a partially exploded view of the clutch device of figure 1,

Figure 3 shows a side view of the clutch device of figure 1 with a housing part,

Figure 4 shows a cross-section of the clutch device, the drive shaft and the drive pinion along the section line A-A in figure 3,

Figure 5 shows a cross-section of the clutch device, the drive shaft and the drive pinion along section line B-B in figure 3,

Fig. 6 shows a top view of the clutch device of fig. 1, in a state corresponding to the locking device having been locked,

Fig. 7 shows a top view of the clutch device of fig. 1, in a state in which the locking device is unlocked,

Fig. 8 shows a top view of the clutch device of fig. 1, in a state during unlocking of the locking device,

Fig. 9 shows a top view of the clutch device of fig. 1, in a state in which the clutch device is in the dead-center range and the locking device is unlocked,

Fig. 10 shows a top view of the clutch device of fig. 1, in a state corresponding to the locking device having been unlocked,

Fig. 11 shows a top view of the clutch device of fig. 1, in the unlocked state of the locking device,

Fig. 12 shows a view of a vehicle seat with the clutch device and the locking device of fig. 1, wherein the clutch device and the locking device are in the state as in fig. 6,

Fig. 13 shows a view of the vehicle seat of fig. 12, wherein the clutch device is in the state as in fig. 7,

Fig. 14 shows a view of the vehicle seat of fig. 12, wherein the clutch device is in the state as in fig. 9,

Fig. 15 shows a view of the vehicle seat of fig. 12, with the clutch device in the state as in fig. 10, and

Fig. 16 shows a view of a variant of the vehicle seat of fig. 12.

Detailed Description

Fig. 1 shows a perspective view of a clutch device 1 according to the invention. Fig. 2 to 5 show further views of the clutch device of fig. 1 and will be described together below. Fig. 6 to 15 are used to illustrate the functional cooperation with the locking device 104.

The locking device 104 is used, for example, for locking a seat structure 102, such as a backrest structure, of the vehicle seat 100 according to the invention to a vehicle structure, to another seat structure of the vehicle seat 100, or to a vehicle seat adjacent to the vehicle seat 100. The further seat structure may be, for example, a further backrest structure.

The clutch device 1 for engaging a drive device, in particular an electric motor, and a locking device 104, in particular a rotary latch, shown in fig. 12 to 15, essentially has a clutch base 2, a clutch core 10, a clutch shaft 6, an elastic element 12, a coupling wheel 18 and a coupling rod 24.

The clutch base 2, the clutch core 10, the elastic element 12 and the coupling wheel 18 form a so-called wrap spring clutch. The clutch base 2 and the clutch core 10 are here integrally formed. The clutch base 2 has a substantially disc-shaped, cylindrical shape. The clutch core 10 is formed in a substantially cylindrical shape. The clutch core 10 has a diameter predetermined for sizing the clutch device 1. The clutch base 2 and the clutch core 10 are rotatably supported relative to the coupling wheel 18 by the clutch shaft 6. The clutch base 2 and the clutch core 10 are rotatably supported on the clutch shaft 6. As long as the clutch shaft 6 itself is rotatably supported in the clutch housing 30, the clutch base 2 and the clutch core 10 may instead be non-rotatably supported on the clutch shaft 6.

The coupling wheel 18 has a follower pin 22, in particular in the radially outer region. The follower pin 22 protrudes perpendicularly from the coupling wheel 18. The follower pin 22 is used on the output side for connection to a coupling rod 24. For this purpose, the coupling lever 24 has an elongated hole 26 in the region of the first end 24 a. The follower pin 22 is guided displaceably in an elongated hole of the coupling rod 24. The follower pin 22 and the long hole 26 constitute a rotary movement joint.

In a second end 24b opposite the first end 24a, the coupling rod 24 has a connection hole 28. The coupling rod 24 can be rotatably connected to an unlocking lever 106 of the locking device 104 via the connecting hole 28. The coupling lever 24 is here connected in its connection opening 28 to an intermediate lever 108, which intermediate lever 108 is in turn operatively connected to the unlocking lever 106. Any force applied to the intermediate lever 108 is transferred from the intermediate lever 108 to the unlocking lever 106.

The elastic element 12 is embodied in particular as a wrap spring. The elastic element 12 has axially protruding legs at both ends, in particular a first leg 14 and a second leg 16. The elastic element 12 is arranged coaxially with the clutch core 10. The first leg 14 of the resilient element 12 is fixed in a hole in the clutch base 2. The second leg 16 of the resilient element 12 is secured in the aperture 20 of the coupling wheel 18. Between the first leg 14 and the second leg 16, the spring element 12 has a plurality of coils, which have in particular a coil radius predetermined for dimensioning the clutch device 1. In the relaxed state of the elastic element 12, an annular gap is provided between the elastic element 12 and the clutch core 10.

If the clutch base 2, which can be driven by the drive, is rotated relative to the coupling wheel 18 in the winding direction of the elastic element 12, the first leg 14 is correspondingly rotated together with the clutch base 2 and the second leg 16 is fixed in the coupling wheel 18. The spring element 12 is thus rotated in its winding direction, whereby the coil radius of the spring element is reduced until the coil of the spring element 12 rests against the outer side of the clutch core 10. This state of the clutch device 1 may be referred to as an engaged state.

The clutch base 2 has external teeth 4 here. The clutch base 2 meshes with its external toothing 4 with an adjacent drive pinion 42 which can be driven by a drive. For this purpose, the drive pinion 42 is connected to the drive shaft 40 of the drive device in a rotationally fixed manner. The drive pinion 42 and the external toothing 4 of the clutch base 2 may form a reduction gear or an increase gear.

Fig. 6 to 11 each schematically show a top view of the previously described clutch device 1, wherein the clutch device is in each case in different states of the unlocking process. Fig. 12 to 15 show a vehicle seat 100 with a clutch device 1, which clutch device 1 is connected to a locking device 104 in several corresponding states shown in fig. 6 to 11. In particular, regarding the structure and function of the locking device, an exemplary usable locking device 104 is described in DE 102015204190 A1.

The clutch device 1 according to the invention for engaging a drive with a locking device 104 provides that the locking device 104 can be unlocked by the drive, wherein, for unlocking the locking device 104, the drive can be coupled by the clutch device 1 with an unlocking lever 106 of the locking device 104, so that a drive movement of the drive is converted into an unlocking movement of the unlocking lever 106. The clutch device 1, immediately after unlocking the locking device 104, disengages the drive device from the unlocking lever 106, so that the unlocking lever 106 can freewheel, in particular for locking the locking device 104 again. The unlocking lever 106 is thus prevented from being pulled suddenly during the closing of the locking device 104, which could damage the drive device.

Fig. 6 and 12 show the clutch device 1 in a state corresponding to the unlocking device 104 having been locked. The elastic element 12 of the clutch device 1 is in a relaxed state and the clutch base 2 and the coupling wheel 18 are aligned with each other in the initial position. If the clutch base 2 is driven by the drive device, the entire clutch device 1 is first rotated until the follower pin 22 comes to rest against the end of the slot 26 opposite the second end 24 b. The follower pin 22 and the coupling wheel 18 are then held in this starting position by the locking device 104 by the unlocking lever 106 and the coupling rod 24. Continued rotation of the clutch base 2 causes the clutch base 2 to rotate relative to the coupling wheel 18, whereby the resilient element 12 itself is rotated. Depending on the dimensioning of the spring element 12 and/or the clutch core 10, the required advance of the clutch base 2 relative to the coupling wheel 18 can be set, which must be reached before the spring element 12 rests against the clutch core 10 and the clutch base 2 stops relative to the coupling wheel 18.

In this state, the spring element 12 itself is rotated, so that the coil radius is reduced or reduced relative to the relaxed state, and the spring element 12 rests on the clutch core 10. The follower pin 22 of the coupling wheel 18 is able to move along a circular trajectory. The coupling rod 24 serves to convert the rotational movement of the coupling wheel 18 into a substantially linear pulling movement of the unlocking lever 106. As the clutch base 2 continues to be driven, the coupling lever 24 is driven by the follower pin 22 due to the driving of the coupling wheel 18, as shown in fig. 7, 8 and 13.

In fig. 9 and 14, a state is shown in which the unlocking lever 106 is located in the unlocking position and the follower pin 22 is located at a position almost farthest from the connection hole 28. This position may also be referred to as a so-called dead point. If the follower pin 22 is fixed at this dead point, the locking device 104 cannot be locked because the coupling rod 24 continuously operates the unlocking lever 106 and thus prevents locking.

If, in the clutch device 1, the drive device is then disconnected and the clutch base 2 is stopped in that position in which the follower pin 22 is located at the dead point, the coupling wheel 18 continues to rotate due to the pretensioning force of the elastic element 12, whereby the follower pin 22 is forcedly moved away from the dead point. The clutch device 1 is thus shifted to a state in which the unlocking lever 106 is disengaged from the drive device under forced control immediately after unlocking of the unlocking device 104.

When the clutch base 2 is driven beyond the aforementioned position in which the follower pin 22 is at dead point, the elastic element 12 accordingly relaxes and the rotation of the coupling wheel 18 accelerates. In this case, the counter moment introduced from the coupling lever 24 via the follower pin 22 of the coupling wheel 18 is reduced and the elastic element 12 is relaxed, whereby the speed of movement of the coupling wheel 18 relative to the clutch base 2 is accelerated until the coupling wheel 18 and the clutch base 2 are again aligned with each other in the initial relative angular position (corresponding to the initial position). This state is shown in fig. 10 and 15.

A variation of the vehicle seat 100 of fig. 12 is shown in fig. 16. The only difference from the vehicle seat 100 shown in fig. 12 is that the coupling lever 24 of the clutch device 1 is directly connected to the unlocking lever 106 of the unlocking device 104. The intermediate lever 108 may continue to exist, for example, to be manually unlocked by a handle operatively connected to the intermediate lever 108.

The features disclosed in the foregoing description, in the claims and in the accompanying drawings may be of significance both individually and in combination with one another for the realization of the invention in its various embodiments.

While the invention has been illustrated in detail in the drawings and foregoing description, the same is to be considered as illustrative and exemplary and not restrictive in character. In particular, the choice of proportions shown in the drawings of the various elements should be construed as not being necessary nor limiting. Furthermore, the invention is not limited in particular to the described embodiments nor to variants of the embodiments. Other variations to the present invention and embodiments thereof will become apparent to those skilled in the art from the foregoing disclosure, accompanying drawings, and claims.

The use of terms such as "comprising," "having," "including," "containing," and similar terms in the claims does not exclude other elements or steps. The use of the indefinite article does not exclude a plurality. A single device may perform the functions of several units or devices as mentioned in the claims.

List of reference numerals

1. Clutch device

2. Clutch base

3. External teeth

6. Clutch shaft

10. Clutch core

12. Elastic element

14. First support leg

16. Second support leg

18. Coupling wheel

20. Hole(s)

22. Follow-up pin

24. Coupling rod

24A first end

24B second end portion

26. Long hole

28. Connecting hole

30. Clutch housing

40. Driving shaft

42. Driving pinion

100. Vehicle seat

102. Chair structure

104. Locking device

106. Unlocking lever

108. Intermediate lever

Claims

1. A vehicle seat (100) having a seat structure (102) and having a locking device (104) for locking the seat structure (102) to the vehicle structure or to another seat structure, wherein the locking device (104) can be unlocked by a drive device, wherein, for unlocking the locking device (104), the drive device can be coupled with an unlocking lever (106) of the locking device (104) by a clutch device (1) such that a driving movement of the drive device can be converted into an unlocking movement of the unlocking lever (106),

Characterized in that the clutch device (1) is disengaged from the unlocking lever (106) immediately after unlocking the locking device (104).

2. The vehicle seat (100) of claim 1, wherein the seat structure (102) is a backrest structure.

3. The vehicle seat (100) according to claim 1, characterized in that the drive device is separated from the unlocking lever (106), the unlocking lever (106) being free-wheeling, wherein the free-wheeling of the unlocking lever (106) enables the locking device (104) to be locked again.

4. The vehicle seat (100) according to claim 1, characterized in that the clutch device (1) is shifted under forced control to a state in which the unlocking lever (106) is disengaged from the drive device immediately after unlocking the locking device (104).

5. The vehicle seat (100) according to claim 1, characterized in that the clutch device (1) has a wrap spring clutch.

6. The vehicle seat (100) according to claim 1, characterized in that the clutch device (1) has a clutch base (2) and a clutch core (10).

7. The vehicle seat (100) according to claim 6, wherein the clutch base (2) and the clutch core (10) are integrally formed.

8. Vehicle seat (100) according to claim 6, characterized in that the clutch device (1) has an elastic element (12).

9. The vehicle seat (100) according to claim 8, wherein the elastic element (12) is a wrap spring or a torsion spring.

10. The vehicle seat (100) according to claim 8, wherein the elastic element (12) has axially protruding legs (14, 16) at both ends.

11. The vehicle seat (100) according to claim 10, wherein the first leg (14) of the resilient element (12) is fixed in a hole of the clutch base (2).

12. The vehicle seat (100) according to claim 10, wherein the second leg (16) of the resilient element (12) is fixed in a hole (20) of the coupling wheel (18).

13. The vehicle seat (100) according to claim 12, wherein the elastic element (12) is arranged coaxially with the clutch core (10).

14. The vehicle seat (100) according to claim 12, characterized in that the coupling wheel (18) is rotatably supported on the clutch shaft (6).

15. The vehicle seat (100) of claim 14, wherein the coupling wheel (18) has a follower pin (22) in a radially outer region.

16. The vehicle seat (100) according to claim 15, characterized in that the clutch device (1) has a coupling rod (24).

17. The vehicle seat (100) according to claim 16, characterized in that the coupling rod (24) has an elongated hole (26) in the region of the first end (24 a) of the coupling rod (24).

18. The vehicle seat (100) of claim 17, wherein the coupling rod (24) is connected with the follower pin (22).

19. The vehicle seat (100) according to claim 18, characterized in that the follower pin (22) is movably guided in an elongated hole (26) of the coupling rod (24).

20. Vehicle seat (100) according to claim 19, characterized in that a connecting hole (28) for the articulated connection with an unlocking lever (106) of the locking device (104) is provided on a second end (24 b) of the coupling rod (24) opposite the slot (26).