JP3208080B2 - Car Seat Hasp Fixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch fitting for a motor vehicle seat, and more particularly to a seat backrest which is pivotable about the axis of an articulation joint by the latch fitting. A latching device is provided to be fixedly connected to the support structure of the seat at the selected rotational position, wherein the latching device is provided on one part of the fixture and is connected to the axis of the articulation joint. A motor vehicle seat comprising a toothed portion having concentric teeth and a toothed pawl articulated to the other portion of the fixture and rotatable into an intermeshing position by an actuating element. For a latch fixture for

[0002]

2. Description of the Related Art Known latch fixtures of this type include:
The rearward pivoting range of the seat back is limited by a mechanical stop for the upper part of the fitting joined to the seat back. Small manufacturing tolerances are maintained in order to be able to ensure in this most rearward pivoted position that the latching device locks at the moment the actuating element of the latching device is released. Have to be done, which makes the locking device expensive. This is especially true as the force transmitted to the toothed pawl by the teeth of the latch device as the load is applied in the rearward direction of the seat back rest makes the teeth of the toothed pawl stronger in the teeth of the toothed part. This is true when the latch is configured to produce a pushing moment. When the latching device is configured in this way, the toothed pawl can only be pivoted to its fixed position when the toothed parts are in fact rotating simultaneously.

[0003]

SUMMARY OF THE INVENTION The present invention is directed to a toothed jaw engaging a toothed portion when the actuating element for the toothed jaw is released, even when the fixture is in one end position. It is based on the problem of providing a latch fitting of the type described above, which can be cost-effectively assured and thereby locking the fixture.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide a latch fitting for a motor vehicle seat of the type described above, which has a control device with a toothed claw associated therewith, the control device having a toothed part. During a pivoting movement of the part of the fixture with respect to the other pivoted part relative to the other part of the fixture, the toothed pawl is forcibly moved towards its intermeshing position, whereby the toothed pawl is displaced. Each available tooth is aligned in the space between the teeth of the toothed part, and the toothed pawl engages the teeth of the toothed part just before reaching the predetermined pivot position of the part of the fixture to be locked. The problem is solved by a latch fitting which is characterized in that

In the case of the latch fixture of the present invention, a mechanical stop which limits the range of rotation in one direction is omitted, thereby eliminating the need for precise tolerances to be maintained. For the sake of precision, the control associated with the toothed pawl causes the pivoting movement of the toothed pawl to be pivoted towards a predetermined end position for the part of the fixture that can be locked by the toothed pawl. Match the rotational movement of the toothed part,
Thereby, the tooth or teeth of the toothed nail are aligned with the space between the teeth of the toothed part before the toothed nail begins to engage the teeth of the toothed part, and the predetermined end position As a result, the toothed claws engage with the teeth of the toothed portion without play. The interlocking movement of the toothed claw and the toothed part is
It does not prevent the latching device from being approached by the actuating element to a pivot position that is within the pivot range. In addition, in these pivoted positions, there is no obstruction when the teeth of the toothed claw are not initially aligned with the space between the teeth of the toothed part, because in these pivoted positions This is because the seat back rest is moved forward or backward enough for the toothed pawl to lock with the toothed part. Alternatively, however, the control device can be configured to operate only at the end of the pivot range limited by the predetermined end position.

In a preferred construction, the control device starts with a defined pivotal position of the part of the fixture having a toothed part and transmits the movement of this part of the fixture to the toothed part according to a given relationship. Mechanical gear mechanism. Such a control device can be embodied simply and in a space-saving manner. This is especially
This can be said when a mechanical gear mechanism has a control cam that provides a given relationship and a follower element that follows this cam.

In a particularly advantageous embodiment because of its simplicity, the towing lever is rotatably mounted on the axis of the articulation and the part of the mounting with toothed parts is oriented in a predetermined pivoted position. As it moves, it is prevented from pivoting with this portion of the fixture. The gear connection between the towing lever and the toothed pawl is generated in this case by the control cam and the follower element. The control cam preferably defines a window of the towing lever. The driving action of the towing lever is made possible, for example, by a pin.

If the window is in the form of a groove following the control cam, the pivoting movement of the toothed pawl by the actuating element results in the pivoting movement of the towing lever. This window can also be configured such that the pivoting movement of the toothed pawl by the actuating element takes place without a simultaneous pivoting movement of the towing lever.

Instead of only one predetermined pivoted position limiting the pivoting range to one pivoting direction, at least two selectable predefined pivoted positions are provided. If the control device has a tow lever, it is only necessary to select a corresponding different position for the drive member. Such a drive member may for example be in the form of a rotatable eccentric disc which can be set in different rotated positions. However, it is also possible in a simple manner to obtain different predetermined pivot positions when using pins as drive members. For this, it is only necessary that the pins are inserted in different positions or moved, for example, by sliding members.

Via the interlocking of the pivoting movement of the toothed part with the pivoting movement of the toothed claw, the position of the toothed claw with respect to the axis of the articulation of the tooth is provided, whereby the fixture with toothed part is provided. Providing that the load applied to the toothed claw engaging the toothed portion with the portion toward the predetermined pivot position produces a torque such that the force applied to the teeth of the toothed portion of the toothed claw increases. It is possible without difficulty.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail hereinafter with reference to an embodiment shown in the drawings.

The backrest of the seat is pivotable about the axis of the articulation 2 and is connected by a latching device to a selectable pivoting position so as not to move relative to the support structure of the seat. A latch fitting for an installed motor vehicle seat comprises a lower fitting part 1 joined to the support structure of the seat and pivotally connected thereto by the axis of the articulation 2. And a panel-shaped upper fitting part 3 joined to the backrest of the seat. The blank part of the upper part 3 of the fitting projecting downward beyond the axis of the articulation 2 forms a toothed part 4 with teeth 4 ′ directed downwardly of the toothed part 4 concentric with the pivot pin 2. In this embodiment, it extends only over the central part of the lower edge of the upper part 3 of the fixture. Below the toothed part 4, the toothed nail 6
The pin 5 located parallel to the axis of the articulation 2 is articulated to the lower part 1 of the fixture, and the toothed pawl 6 lies on the same plane as the toothed part 4. Along the longitudinal side facing the toothed part, the toothed pawl 6 is provided with teeth 6 'which mesh with the teeth 4'.

The arrangement of the teeth 6 'with respect to the pin 5 is such that when the latch is closed, the upper part 3 of the fixture is loaded and the teeth 4' and 6 'are rotated as a result of a clockwise rotation as seen in FIG. The force transmitted to the toothed pawl 6 by '1' is selected to produce a torque that pushes the teeth 6 'more strongly into the teeth 4', ie, a torque acting counterclockwise as viewed in FIG.

From the disengaged position of the toothed pawl 6 shown in FIG. 1 in which the teeth 6 'do not mesh with the teeth 4' so that the upper part 3 of the fixture 3 can pivot with respect to the lower part 1 of the fixture.
The toothed pawl 6 can be pivoted counterclockwise to its fixed position in which the teeth 6 'engage the teeth 4' without play when viewed in FIG. 1, so that the upper part 3 of the fixture is The interlocking with the lower part 1 of the fixture is ensured and without play. Due to this pivoting movement of the toothed pawl 6, an actuating element 8 is articulated on the underside of the toothed pawl with a pin 7 on the lower part 1 of the fixture, and the actuating element 8 is coplanar with the toothed pawl 6. It is located in. The actuating element 8 is provided at its free end with a shut-off cam 9 and a fastening cam 10 adjacent thereto.

The actuating element 8 is held in the pivoted position shown in FIG. 1 against the force of the pretensioned spring, in which the toothed pawl 6 is in its disengaged position.
When actuating element 8 is released, actuating element 8 is rotated clockwise as viewed in FIG. 1 by a pretensioned spring. Since the actuating element 8 abuts the lower longitudinal side of the toothed pawl 6, this pivoting movement causes the toothed pawl 6 to pivot to its fixed position. For this reason, first, the blocking cam 9 and the fastening cam 10 come into contact with the lower edge of the claw 6 in the longitudinal direction. The inclination of the fastening cam 10 is selected so that no self-locking action takes place. On the other hand,
The self-locking action is achieved when the shut-off cam 9 is actuated. By this means, when the upper part 3 of the fixture is overloaded, no inoperative state occurs, whereas the toothed pawl 6 is actuated as shown in FIG. The pawl 6 is rotated clockwise to prevent further pivotal movement. Here, the teeth 6 ′ of the toothed nail 6 still largely mesh with the teeth 4 ′ of the toothed part 4.

The upper part 3 of the fitting is securely, ie, independent of the actuating element 8, with the upper part in the end position in FIG.
In this embodiment, a control means consisting of a mechanical gear mechanism is associated with the toothed pawl 6 in order to lock in this end position when pivoted clockwise as seen in FIG. This gear mechanism is mounted on a shaft of the articulated joint 2 so as to be rotatable, extends downward away from the axis of the articulated joint 2, and engages over a lower end portion thereof and a portion of the toothed claw 6. have. This lower end is provided with a window in the form of a control groove 12 projecting from the toothed pawl 6 and engaging a pin 13 arranged parallel to the pin 5. The pin 13 acts as a follower pin for the control cam 12 'forming the lower edge of the control groove 12. Furthermore, the control device comprises a drive pin 14 projecting from the upper part 3 of the fitting, at the end of the pivot range of the upper part 3 the drive pin is engaged with the towing lever 11 and the upper part of the latter. 3 forcibly moves the pivoted lever 11 as it is pivoted to the end position, i.e. clockwise as seen in FIG.

The control cam 12 ′ is provided so that the toothed pawl 6 is restrained and the pin 13 is restrained during this restrained pivoting movement of the towing lever resulting from the defined pivoting position of the mounting upper part 3.
From their disengaged position substantially located at one end of the control groove 12 are engaged with one another in a movement which corresponds to the rotational movement of the toothed part 4 as shown in FIGS. It is configured to rotate to the inclined position. These figures also show that the teeth of the toothed pawl 6 are directed towards a specific space between the teeth 4 'of the toothed part 4 which must enter to lock the mounting upper part 3 in its end position. It is shown that it is possible. When this end position is reached, the actuating element 8
Is released, and the actuating element 8 is moved clockwise as viewed in FIG. 4 so that its fastening cam 10 abuts the underside of the toothed pawl 6 and engages its teeth without play with the teeth 4 ′ of the toothed part 4. Rotate to the holding operating position. When the toothed pawl 4 locks the upper part 3 of the fixture in its rear end position, the pin 1
Reference numeral 3 is located near the rear end of the control groove 12, as shown in FIG.

If the upper part 3 of the fitting is pivoted counterclockwise as viewed in FIG. 4 out of its end position, the actuating element 8 is pivoted to the inoperative position shown in FIG. It just needs to be done. The toothed pawl 6 can thus be pivoted into its disengaged position by applying a force in the direction of a forward pivoting moment to the upper part 3 of the fixture, the force of this moment also being a different pivoted position. Gives the change in angular position from The force transmitted by the teeth 4 'and 6' to the toothed pawl 6 thereby produces a torque in a clockwise direction as seen in FIG. 4, which disengages the toothed pawl 6 from the teeth 4 'of the toothed part 4. In addition to this, the pin 13 and the control cam 1
With 2 ′, the towing lever 11 is also rotated. Actuating element
8 is released, the force of the pretensioned spring
As a result, the actuating element 8 rotates clockwise as seen in FIG.
The pawl 6 is rotated to a position where it engages with the toothed portion 4.
Further, the towing lever 11 is rotated clockwise.

The second embodiment shown in FIG. 5 is different from the first embodiment in that the control cam 1 of the towing lever 111 is provided.
The only difference is that the window 112 defined by 2 'is of a different type. Corresponding parts are therefore indicated by reference numbers increased by 100. For the corresponding features, the reader is referred to the description relating to the first embodiment.

The control cam 112 'has the same shape and position on the towing lever 111 as the control cam 12' on the towing lever 11. However, adjacent to each end of the cam there are two edge portions of the window 112, one of which extends approximately parallel to the side edge of the towing lever 111 and the other extends approximately perpendicular thereto. . The window 112 is thus in the form of a sector, the size of which is
The pin 113 of the toothed claw 106 is selected so that it can move freely in the window 112 when the movable member 108 is rotated to the fixed position by the movable member 108, that is, it is not necessary to move the towing lever 111. You.

The third embodiment shown in FIG. 6 differs from the first embodiment only in that there is a choice of several pivoting positions of the upper part of the fixture and a forced intermeshing occurs. are doing. Corresponding parts are therefore indicated by a reference number increased by 200 with respect to the first embodiment. Further, this difference will be described below. The reader is referred to the description of the first embodiment for the remaining details.

As shown in FIG. 6, the drive pin 214 can be disposed on the upper fixture portion 203 at a different position relative to the axis of the articulation 202. For example, there can be two or more holes into which the drive pins 214 can be inserted as desired. For example, the sliding member also allows the drive pin 214 to move to a different selectable position.
There are two alternatives.

The longitudinal edge of the towing lever 211 provided to engage with the driving pin 214 has a stepped structure. Individual part 2 for engaging drive pin 214
15, 216 and 217 provide different angular positions of the tow lever 211 with respect to the fixture upper part 203;
For this reason, the fixture upper part 203 at different angular positions
Reach a position which corresponds to one end of the pivoting range and cannot be exceeded by the clockwise pivoting movement as seen in FIG.

[Brief description of the drawings]

FIG. 1 shows a first position in which the latching device is released and the upper mounting part is in a pivot position close to the rear end of the pivot range.
FIG. 3 is a front view of the embodiment of FIG.

FIG. 2 is a front view of the first embodiment when the constrained movement of the toothed claws to the intermeshing position begins as the upper fixture portion approaches the rear end position of its pivot range. It is.

FIG. 3 is a front view of the first embodiment with the upper fixture portion closer closer to the limit point behind its pivot range.

FIG. 4 is a front view of the first embodiment with the upper fitting portion in a pivoted position corresponding to the rear end of the pivot range.

FIG. 5 is a front view of the second embodiment with the latching device opened and the upper fixture portion in a pivoted position near the rear end position of the pivot range.

FIG. 6 is a front view of the third embodiment with the latching device opened and the upper fixture portion in a pivoted position near the rear end position of the pivot range.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lower part of fixture 2 ... Joint part 3 ... Upper part of fixture 4 ... Teethed part 4 '... Teeth 5 ... Pin 6 ... Teethed nail 6' ... Teeth 7 ... Pin 8 ... Actuating element 9 ... Cut-off cam 10 ... fastening cam 11 ... towing lever 12 ... control groove 12 '... control cam 13 ... pin 14 ... drive pin

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Berner Bittik, Germany, 72722 Bimbayler, Bihernstrasse 37 (56) References JP-A-49-28467 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) F16B 1/02 B60N 2/00-2/54

Claims (13)

(57) [Claims] 1. A latch mounting for a motor vehicle seat, wherein a seat backrest is pivotable about the axis of the articulation by means of the latch mounting and support of the seat portion by a latching device. A locking device arranged to be coupled in a selectable pivot position so as to be immovable with respect to the structure, the latching device being provided on one part of the fixture and having teeth coaxial with the axis of the articulation; A latching fixture comprising a portion and a toothed claw articulated to the other portion of the fitting and rotatable into an intermeshing position by an actuating element. )
Is combined with a control device (11,12,13,14), the control device comprising a part (3; 203) of the fixture having the toothed part (4) and the other part (1) of the fixture. , The toothed pawls (6; 106) are forcibly moved toward their intermeshing positions when a rotational movement is made toward a predetermined rotated position .
Each tooth has a toothed claw (6; 106) and a toothed part (4)
And the part of the fitting (3; 203) is locked.
Just before reaching the predetermined rotational position that, toothed portion (4)
Latch for a motor vehicle seat, characterized in that it is arranged in the space between each tooth (4 ') of the vehicle. 2. A control device (11, 12, 13, 14).
Has a mounting portion (3; 20) having a toothed portion (4).
3) mounting part starting from the specified pivot position
(3; 203) movement is transmitted to the toothed nail (6; 106)
2. The latch mounting according to claim 1, wherein the latch mounting comprises a mechanical drive mechanism . 3. The control cam (1) includes a mechanical drive mechanism.
3 ';112') and a follower element (13; 113) following said control cam. 4. A traction lever (11; 111; 211) as part of a mechanical gear mechanism, said traction lever being rotatably mounted on the axis of the articulation (2) and being mounted. The part (3; 203) of the fixture has a toothed portion (4) in the direction of rotation of the part of the fixture in which the part is oriented to a predetermined rotation position
And towing lever (11; 111; 211)
To the control cam (12 ', 112') and the follower element (13;
113) The latching attachment according to claim 3, characterized in that it is forcibly moved by coupling to the toothed pawl (113). 5. A window (12;) in which a towing lever (11; 111; 211) is defined by a control cam (12 ';112') in a portion overlapping the toothed nail (6; 106).
5. A latch according to claim 4, characterized in that the pin (13) engaging the window (12; 112) is provided on the toothed pawl (6; 106). 6. The latch fitting according to claim 5, wherein the window (12) is in the form of a groove following the control cam (12 '). 7. A tow lever (111) with a window (112).
6. A latch according to claim 5, characterized in that it has a shape that allows the pivoting movement of the toothed pawl (106) by an operating element (108) independent of the pivoting movement of the latch. 8. A latch according to claim 1, having at least two selectable specific pivot positions. 9. A latch according to claim 8, wherein each of the predetermined pivot positions is determined by a selectable position of the drive element (214) for the towing lever (211). . 10. The drive element can be mounted at different positions.
The latch fixture according to claim 9, which is a drive pin . 11. The latch mounting according to claim 9, wherein the drive element is in the form of a pin (14). 12. The support surface of the towing lever (211) is one part (2) for each predetermined position of the drive element (214).
The hasp fitting according to claim 11, characterized in that it has a stepped shape having (15, 216, 217). 13. The position of the pivot (2) with respect to the tooth (6 ') of the toothed pawl (6) is selected, whereby a predetermined pivoting of the toothed pawl (6) into engagement with the toothed part (4). Part (3) of a fixture having a toothed part (4) facing a position
13. The load of claim 1, characterized in that the tooth claw (6) generates a torque such that the force exerted on the tooth (4 ') of the toothed part (4) is increased. A latch mounting according to any one of the preceding claims.