JPH0737549Y2 - Reclining seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to a reclining seat, and more particularly, to a rear end portion of a seat cushion, which supports a lower end portion of the seat back through a reclining device. And a reclining seat in which the seat cushion is supported on an upper rail of a seat track and the position in the front-rear direction can be adjusted on the lower rail.

(Prior Art) As one type of reclining device that constitutes a reclining seat, it is disclosed in a publication "Automotive Engineering Handbook, Vol. 6, page 26 (published by Japan Society of Automotive Engineers)" and Japanese Utility Model Laid-Open No. 63-26443. As described above, the lower bracket fixed to the seat cushion side, the upper bracket pivotally attached to the lower bracket so as to be rotatable in the front-rear direction and fixed to the seat back side, and the pivotally attached portions of these both brackets are centered. A ratchet that has arcuate teeth and is provided on the upper bracket, a pole that is rotatably assembled to the lower bracket and that releasably meshes with a part of the teeth of the ratchet, and the ratchet The pawl is disengaged from the ratchet by a spring member that meshes with the teeth and a pivoting motion that is rotatably assembled to the lower bracket and resists the spring member There is a reclining device having a release lever for removing.

According to this type of reclining device, the engagement of the pole with the ratchet is released by rotating the release lever against the spring member, and the seat back can be rotated in the front-rear direction with respect to the seat cushion. By rotating the seat back in the front-rear direction and releasing the rotation operation of the relays lever, the meshing position of the pawl with respect to the ratchet can be changed to appropriately adjust the inclination angle of the seat back.

On the other hand, as a seat track that supports the seat cushion and allows the position of the reclining seat to be adjusted in the front-rear direction, the lower rail, the upper rail that is slidably mounted on the lower rail in the longitudinal direction, and the upper rail are appropriately attached to the lower rail. There is known a seat track having a lock mechanism that is releasably locked at the position. According to this type of seat track, by rotating the seat track handle that constitutes the lock mechanism, the lock release lever is rotated to release the lock of the upper rail with respect to the lower rail, and the seat is moved in the front-rear direction. If you release the turning operation of the seat track handle,
The position of the seat in the front-rear direction can be adjusted by changing the lock position of the upper rail with respect to the lower rail.

(Problems to be solved by the invention) As described above, in the reclining seat of the type, when the release lever is released while the seat back is being rotated, the pawl is engaged with the ratchet by the action of the spring member, Since the seat back cannot be further rotated, the release lever must be operated until the seat back is completely rotated. The same applies during the movement of the seat in the front-rear direction, and the operation of the seat track handle must be maintained until the end of the movement operation.

Therefore, for the purpose of laying down the body of the occupant or mounting a long object, the seat is moved forward and the seat back is tilted backward to be horizontal or close to this (hereinafter referred to as a flat state. ), It is necessary to maintain the rotation operation of the seat track handle to move the seat forward and maintain the rotation operation of the release lever to tilt the seat back backward.
The operation of flattening the seat is extremely troublesome.

Therefore, an object of the present invention is to provide a reclining seat of this type with respect to the lower rail of the upper rail by the locking mechanism of the seat track, by rotating the release lever of the reclining device to rotate the seat back forward by a predetermined amount. The lock is released at the same time, and even after releasing the rotation operation of the release lever, the engagement of the pole with the ratchet is restricted, and the lock of the upper rail with respect to the lower rail is restricted when the seat back is tilted forward. An object of the present invention is to provide a reclining seat capable of flattening the seat in a state in which the rotating operation of is released.

(Means for Solving the Problem) The present invention supports the lower end of the seat back at the rear end of the seat cushion through a reclining device, and makes it possible to adjust the tilt angle of the seat back in the front-rear direction. In a reclining seat in which the seat cushion is supported on an upper rail of a seat track and the position in the front-rear direction can be adjusted on the lower rail, the reclining device includes a lower bracket fixed to the seat cushion side, and a rear bracket attached to the lower bracket. An upper bracket fixed to the seat back side and pivotally movably pivoted in a direction, and a ratchet provided on the upper bracket having arcuate tooth portions centering on the pivotally attached portions of these brackets. , One of the teeth of the ratchet rotatably assembled to the lower bracket By a pole releasably meshing with the portion, a spring member for biasing the pole to mesh with the tooth portion of the ratchet, and a pivoting motion that is rotatably assembled to the lower bracket and resists the spring member. A release lever that releases the engagement of the pawl with the ratchet, and an arc-shaped cover portion that covers the tooth portion of the ratchet from the outer peripheral side to restrict the engagement with the pawl. An engagement restricting member that is supported so as to be rotatable with respect to the lower bracket and rotatable with respect to the upper bracket by a predetermined amount, and a large amount forward rotation position by urging the engagement restricting member. And a spring member for positioning the
The lock release lever of the lock mechanism that locks the upper rail to the lower rail and the upper bracket are connected by a connecting member, and when the seat back rotates forward by a predetermined amount, the upper rail is connected via the connecting member. It is characterized in that the lower rail is configured to be unlocked.

(Operation and effect of device) In the reclining seat configured in this way,
When the release lever constituting the reclining device is rotated against the spring member, the engagement of the pole with the ratchet is released. Therefore, the seat back can be rotated in the front-rear direction, and if the seat back is rotated in the front-rear direction, the upper bracket and the ratchet integrally rotate, and the seat back rotates to a desired position. If the pivoting operation is released, the meshing position of the pole with respect to the ratchet is changed and the tilt angle of the seat back in the front-rear direction is adjusted appropriately.

Further, in the reclining seat, when the seat track handle constituting the seat track is rotated, the lock release lever is rotated to release the lock of the upper rail with respect to the lower rail. For this reason,
The seat becomes movable in the front-rear direction, and if the seat is moved to a desired position and the rotation operation of the seat track handle is released, the lock release lever is returned to rotate and the lock position of the upper rail with respect to the lower rail is changed. The position in the front-back direction is adjusted appropriately.

On the other hand, after rotating the release lever to release the engagement of the pole with the ratchet, when the seat back is once rotated forward by a predetermined amount, the lock release lever that constitutes the lock mechanism of the seat track is rotated, The upper rail with respect to the lower rail is unlocked to allow the seat to move forward, and at the same time, the meshing restricting member positioned at the maximum forward rotating position rotates integrally with the upper bracket to cover the restricting member. Move to the position facing the teeth of the pole. For this reason, when the release lever is released from the rotation operation, the pawl is brought into contact with the outer periphery of the cover of the meshing restriction member by the action of the spring member to restrict the engagement with the ratchet, and the release lever is released from the rotation operation. The seat can be moved forward and the seat back can be rotated rearward.

Therefore, when the seat is moved forward while the rotation operation of the release lever is released and the seat back is rotated backward by a predetermined amount in this state, the relative position of the meshing restricting member to the upper bracket is rearward of the meshing restricting member. When the seat back is further rotated rearward, the meshing restricting member rotates integrally with the upper bracket, and the cover portion moves rearward between the pole and the ratchet. As a result, the pole meshes with the end portion of the ratchet, the further rotation of the seat back is restricted, and the seat is held in a flat state.

As described above, according to the reclining seat, the inclination angle of the seat back in the front-rear direction can be appropriately adjusted, and the release lever is once rotated to rotate the seat back forward by a predetermined amount. With this, the seat can be moved forward while the rotation operation of the release lever is released, and then the seat back can be rotated backward. Therefore, when the reclining seat is moved to the front and flattened, the seat track handle is kept rotating,
There is no need to maintain the rotation operation of the release lever,
The operation of flattening the seat becomes extremely easy.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a reclining device used for a reclining seat according to the present invention, and FIG. 2 shows the present invention. A vehicle second seat S2, which is an example of a reclining seat, is shown.

The reclining device 10 is a seat track described later.
Seat cushion SC mounted on 20 upper rails 23, 24
The lower bracket 11 is fixed to the rear end portion, and the upper bracket 11 is provided with an upper bracket 13 which is pivotally mounted on the lower bracket 11 so as to be rotatable in the front-rear direction about a pivot shaft 12. This upper bracket 13 is fixed to the lower end portion of the seat back SB to support the seat back SB rotatably in the front-rear direction, and one end is fixed to the pivot shaft 12 and the other end is fixed to the same bracket 13. It is biased forward at 14. Further, an arc-shaped ratchet 15 is integrally formed at the lower end of the upper bracket 13.

On the other hand, the lower bracket 11 is provided with a plurality of teeth 16a capable of meshing with the ratchet 15 and a pole 16 having a cam hole 16b is rotatably attached to the lower bracket 11 and the teeth 16a are attached to the upper bracket 13. When it is rotated forward, it engages with the starting end of the ratchet 15 as shown in FIG.
When 13 is rotated rearward, it meshes with the end side of the ratchet 15.

A release lever 17 is rotatably attached to the lower bracket 11 by means of a pivot shaft 12. A pin 17a penetrating into the cam hole 16b is planted in the release lever 17 and is biased in the direction of arrow B by a first spring 17b. As a result, when the release lever 17 is rotated in the direction of arrow A against the first spring 17b, the pin 17a slides along the cam hole 16b, and as a result, the pawl 16 rotates and meshes with the ratchet 15. When released and rotated in the direction of arrow B, the pole 16 will move to the ratchet as shown in FIG.
Mesh with 15.

A fan-shaped cover plate 18 corresponding to the meshing restricting member of the present invention is rotatably attached to the pivot shaft 12, and the tooth portion 15a of the ratchet 15 is covered with a pole 16 at the tip of the cover plate 18. A cover portion 18a for restricting engagement with the ratchet 15 is formed and an arc-shaped elongated hole 18b is formed. The long hole 18b is located on the circumference centered on the pivot shaft 12. On the other hand, the long hole 18 is provided in the upper bracket 13.
When the stopper pin 13a which freely penetrates into b is planted and the stopper pin 13a abuts on one end of the elongated hole 18b as shown in FIG. 1, the cover plate 18 is attached to the upper bracket 13,
The cover portion 18a is locked at a position retracted from the starting end side of the ratchet 15. That is, the cover plate 18 is positioned at the maximum forward rotation position. Also, stop stopper pin 13
When a comes into contact with the other end of the long hole 18b, the cover plate 18 covers the toothed portion 15a of the ratchet 15 with the cover portion 18a with respect to the upper bracket 13 and exposes only the rear end portion. Locked in. The cover plate 18 is the same plate 18
Second spring 18c mounted between the upper and outer bracket 13
The stopper pin 13a is urged in the direction of abutting against one end of the elongated hole 18b as shown in FIG.

The seat track 20 includes a pair of left and right lower rails 21 and 22 fixed to the vehicle floor, and upper rails 23 and 24 slidably attached to both lower rails 21 and 22 in the front-rear direction. Seat cushion SC is fixed. Further, a locking mechanism 30 for releasably fixing the upper rail 23 to the lower rail 21 is disposed between the lower rail 21 and the upper rail 23, and the locking mechanism 30 and the reclining device 10 are connected by a cable 41. Further, a helper spring 42 for urging the rail 24 forward is mounted between the upper rail 24 and the vehicle floor.

The lock mechanism 30 is based on the application filed by the present applicant.
It is similar to the lock mechanism shown in Japanese Patent Publication No. 3 and can be rotated to the side surface of the upper rail 23 and a lock plate (not shown) fixed to the lower rail 21 and having a plurality of engaging portions along the front-rear direction of the rail 21. A seat track handle (31) assembled in the direction (1), and a direction in which a lock lever (not shown) fixed to the handle (31) and releasably engaged with each engagement portion of the lock plate is engaged with the engagement portion of the lock plate. And a open lever 32 that is rotatably supported by the handle 31 and is connected to the cable 41 and that engages with the lock lever when rotating and integrally rotates the lever. The lever 32 corresponds to the lock release lever of the present invention. The other end of the cable 41 is connected to the upper end of the guide portion 13b of the upper bracket 13. As a result, when the upper bracket 13 is rotated forward by a predetermined amount from the state shown in FIG. The upper rail 23 and the lower rail 21 are unlocked by rotating the upper rail 23 integrally with the lower rail 21. When the handle 31 is rotated, only the lock lever is rotated and the lower rail 21 of the upper rail 22 is rotated.
Release the lock on.

This embodiment has the above-mentioned structure, and the release lever 17 is moved from the state shown in FIG. 1 against the first spring 17b by the arrow A.
When rotated in the direction, the pole 16 rotates and the engagement of the pole 16 with the ratchet 15 is released. Therefore, when the seat back SB is rotated rearward, the upper bracket 13 is also integrally rotated and the meshing position of the tooth portion 16a with respect to the ratchet 15 is changed, and the inclination angle of the seat back SB is appropriately adjusted.

On the other hand, after the release lever 17 is operated to release the meshing of the pole 16 with the ratchet 15, the seat back SB is once rotated to the maximum as shown in FIG. 6, and the upper back bracket 13 and the seat back SB are integrated with the seat back SB. As the inner wire 41a is pulled by the rotation, the seat track handle 31 is rotated, and the upper rail 23 is released from the lower rail 21, so that the second seat as shown in FIG.
S2 is moved forward by the helper spring 42.

Further, at this time, since the stopper pin 13a is biased by the second spring 18c and abuts against one end of the elongated hole 18b, as the upper bracket 13 rotates forward, as shown in FIG. 18 is also rotated together with the upper bracket 13 to bring the cover portion 18a to a position facing the tooth portion 16a of the pole 16.

Therefore, when the operation of the release lever 17 is released, the tooth portion 16a of the pole 16 is elastically contacted with the cover portion 18a by the release lever 17 biased by the first spring 17b in the arrow B direction. Therefore, even if the ratchet 15 is rotated to a position where it meshes with the pole 16, the pole for the ratchet 15 is rotated.
Since the engagement of 16 is restricted, the seat back SB can be rotated rearward even if the release lever 17 is released. Therefore, when the seat back SB is rotated rearward, the upper bracket 13 is also rotated rearward and the inner wire 41a is loosened. As a result, the seat track handle 31 returns, the upper mechanism 23 is fixed to the lower rail 21 by the locking mechanism 30, and the second seat S2 is fixed to the front position.

Then, when the upper bracket 13 is rotated backward by a predetermined amount, the stopper pin 13a comes into contact with the other end of the elongated hole 18b as shown in FIG. Further, when the upper bracket 13 is rotated rearward, the cover plate 18 is rotated integrally with the upper bracket 13, and the cover portion 18a is rotated rearward with respect to the tooth portion 16a of the pole 16. Therefore, as shown in FIG. 5, the tooth portion 16a of the pole 16 meshes with the end portion of the ratchet 15, the upper bracket 13 is fixed to the lower bracket 11, and as a result, the second seat S2 is shown in FIG. Set to flat as shown.

As described above, according to the present embodiment, the inclination angle of the seat back SB can be adjusted appropriately, and if the release lever 17 is once operated to rotate the seat back SB forward by a predetermined amount, the second seat S2 is moved. The seat back SB can be automatically moved to the front, and then the seat back SB can be rotated to the rear even if the release lever 17 is released. Therefore, when the second seat S2 is set to the flat, it is not necessary to operate the seat track handle 31, push the second seat S2 forward, or continue to operate the release lever 17, and the operation is extremely easy. Become.

[Brief description of drawings]

FIG. 1 is a side view showing a vehicle seat reclining device according to an embodiment of the present invention, FIG. 2 is a perspective view of a second seat equipped with the device, and FIGS. 3 to 5 are operations of the device. And FIG. 6 to FIG. 8 are side views for explaining the operation of the second seat. Explanation of code 10 …… Recliner, 11 …… Lower bracket, 12
...... Pivot axis, 13 ...... Upper bracket, 13a ...... Stupa pin, 15 ...... Ratchet, 16 ...... Pole, 17 ...... Release lever, 17b ...... First spring, 18 ...... Cover plate, 18a ...... Cover part, 18b ... elongated hole, 18c ... second
Spring, 20 …… Seat track, S2 …… Second seat, SB …… Seat back, SC …… Seat cushion.

Claims (1)

[Scope of utility model registration request] 1. A rear end portion of a seat cushion is supported by a lower end portion of a seat back via a reclining device so that a tilt angle of the seat back in a front-rear direction can be adjusted, and the seat cushion is attached to an upper rail of a seat track. In a reclining seat that is supported on the lower rail so that the position in the front-rear direction can be adjusted on the lower rail, the reclining device is pivotally attached to the lower bracket fixed to the seat cushion side and rotatable in the front-rear direction on the lower bracket. And an upper bracket fixed to the seat back side, a ratchet provided on the upper bracket having arcuate tooth portions centering on pivotal attachment portions of both brackets, and rotatable to the lower bracket Is attached to the ratchet and engages releasably with a part of the ratchet teeth. And a spring member for biasing the pawl to engage with the tooth portion of the ratchet, and a pivoting motion that is rotatably assembled to the lower bracket and resists the spring member to engage the pawl with the ratchet. It has a release lever to be released and an arc-shaped cover part that covers the tooth part of the ratchet from the outer peripheral side and restricts the engagement with the pole. An engagement restricting member that is movably supported so as to be rotatable by a predetermined amount with respect to the upper bracket, and a spring member that biases the engaging restricting member to position the maximum forward rotation position are provided. With the configuration,
The lock release lever of the lock mechanism that locks the upper rail to the lower rail and the upper bracket are connected by a connecting member, and when the seat back rotates forward by a predetermined amount, the upper rail is connected via the connecting member. A reclining seat characterized in that the lower rail is configured to be unlocked.