JP5956865B2 - Seat back advancer - Google Patents

Description

TECHNICAL FIELD The present invention relates to a forward-back device for a seat back in a vehicle seat.

Conventionally, a mechanism disclosed in Patent Document 1 below is known as a vehicle seat having a structure that can be used by switching between two stages, a forward tilt state and a forward tilt state where the seat back is tilted forward rather than the forward tilt state. It has been. In this type of seat, the occupant can easily get into the rear row seats by making the seat lean forward, and the cargo space is expanded by making the seat lean.

In Patent Document 1 below, the relationship between the first operation lever and the first engagement protrusion that prevents the seat back from being tilted forward when the seat back is in the normal standing position, and the first operation lever and the first engagement protrusion. There is described a configuration in which a second operation lever and a second engagement protrusion are provided for preventing the seat back from being moved forward when the seat back is released by releasing the combination.

That is, if the first operation lever is operated to release the engagement and the seat back is moved forward, the seat back is stopped in the forward-turned state, and if the engagement is further released by operating the second operation lever, the seat back is released. Is a structure that allows further advancement (large-down state).

Shoko Sho 63-12006

However, since the levers that operate with each other are independent in the conventional structure, there is a possibility that the user may perform an unexpected operation depending on the operation procedure. Also, the first operation lever and the second operation lever may be operated twice. There is also a problem that the operation lever is required and the operation is troublesome.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat back front-facing device with excellent operability that enables the seat back to be tilted from a forward tilt state to a largely tilted state by a single operation of an operation lever.

In order to solve the above-mentioned problem, in the seat back forward tilting apparatus according to claim 1, the seat back attached to the seat cushion so as to be tiltable is tilted forward, and the seat back is tilted forward than the forward tilted state. A vehicle seat that can be used by switching to a tilted state, the seat back side bracket having a contact portion attached to the seat back side, the seat cushion side bracket attached to the seat cushion side and perforated, A reclining device having a lock mechanism that locks and locks off the relative rotation of the seat back side bracket and the seat cushion side bracket, a perforated operation lever that is connected to the reclining device and switches between lock and lock off, and the seat cushion It is slidably mounted in the side bracket bore, and the seat back A release link that comes into contact with the contact portion of the bracket on the bracket side, and a connection link that is connected to the release link and is slidably mounted in the perforation of the operation lever. When the apparatus is locked off and the seat back side bracket is tilted forward, the contact portion of the seat back side bracket tilts without coming into contact with the release link.

In the seat back forward tilting device according to claim 2, when the seat back side bracket is moved from the forward tilted state toward the large tilted state, the contact portion of the seat back side bracket contacts the release link, When the release link slides in the perforation of the bracket on the seat cushion side, the connection link connected to the release link also slides in the perforation of the operation lever, and the operation lever reclines as the connection link slides. The operation lever is held in a lock-off state by tilting in the lock-off direction of the device and the contact portion being kept in contact with the release link.

In the seat back forward device according to claim 3, the perforation of the operation lever is formed in an arc shape centering on the rotation center of the operation lever, and when the operation lever is operated to tilt the seat back side bracket, The connecting link is not interlocked with the tilting of the operation lever.

In the invention of claim 1, a vehicle seat that can be used by switching between a forward tilt state in which a seat back that is tiltably attached to a seat cushion is tilted and a large tilt state in which the seat back is tilted forward rather than the forward tilt state. A seat back side bracket attached to the seat back side and having a contact portion; a seat cushion side bracket attached to the seat cushion side and perforated; and the relative rotation of the seat back side bracket and the seat cushion side bracket. A reclining device having a lock mechanism that locks and locks off, a perforated operation lever that is connected to the reclining device and switches between lock and lock-off, and is slidably mounted within the perforation of the bracket on the seat cushion side, A release link that contacts the contact portion of the seat back side bracket; A connecting link that is connected to a release link and is slidably mounted in a bore of the operating lever, and the reclining device is locked off by the rotation of the operating lever, and the seat back side bracket is tilted forward In this case, the contact portion of the bracket on the seat back side tilts without contacting the release link. According to the above configuration, in the forward tilt state in which the seat back is not largely tilted, the seat back bracket can be locked at an arbitrary position within a predetermined angle, and the forward tilt state can be moved to the large tilt state. This is possible with a single operation of the control lever. In addition, since the constituent members are installed on the fixed seat cushion side bracket to which the seat cushion or the like is attached, and the movable seat back side bracket is not provided with a mechanism, layout characteristics such as an airbag and an armrest are good. Furthermore, since the operating lever is attached to the fixed seat cushion side bracket, it is easy to operate.

In the invention of claim 2, when the seat back side bracket is moved from the forward tilted state toward the greatly tilted state, the contact portion of the seat back side bracket contacts the release link, and the release link is The connection link that is connected to the release link by sliding in the perforation of the bracket on the seat cushion side also slides in the perforation of the operation lever, and the operation lever is locked off of the reclining device as the connection link slides. The operation lever is held in a lock-off state by tilting in the direction and the contact portion being kept in contact with the release link. By holding the reclining device in the lock-off state with the operation lever, the seat back side bracket can be tilted beyond the lock off region of the reclining device, and the seat back side bracket moves to a state of being largely collapsed.

According to the invention of claim 3, the perforation of the operation lever is formed in an arc shape centering on the rotation center of the operation lever, and the operation lever is operated when the operation lever is operated and the seat back side bracket is tilted. It is characterized in that the connecting link does not interlock with the tilt of the. When the seat back bracket moves to the forward tilted state by the operation of the operation lever, the connection link does not work together, so the release link does not work together, and the urging against the operation of the operation lever Will not be added.

The front view which shows the state of a normal seat apparatus. The rear view which shows the state of a normal sheet | seat apparatus. The action figure which shows the large fall start state which concerns on this invention. The effect | action figure which shows the large fall state which concerns on this invention.

A seat adjuster 100 according to the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the seat adjuster 100 includes a seat back side bracket 1 that allows a seat back to be mounted, a seat cushion side bracket 2 that allows a seat cushion to be mounted, a seat back side bracket 1 and a seat cushion. A reclining device that rotates the side brackets 2 to each other and an operation lever 3 that is operated when tilting the seat back are provided.

The seat back side bracket 1 can be rotated with respect to the seat cushion side bracket 2 by a reclining device, and the seat back side is tilted backward, the forward tilted forward direction, and the forward tilted state. It is used by switching to the large collapsed state. Further, a step portion 4 is formed at the lower end portion of the seat back side bracket 1, and when the seat back side bracket 1 is tilted forward from the forward inclined state, the step portion 4 is connected to a release link pin 5 described later. The release link pin 5 is slid by the contact.

The seat cushion side bracket 2 includes an operation lever 3 that is rotatably mounted by a center shaft, an arc hole 2a that is provided on the circumference centering on the axis of the center shaft, and the arc hole 2a. The release link pin 5 inserted through and slidably attached, the release link 6 interlocked with the release link pin 5, the connection link 7 connected to the release link 6 by a fixed rivet, and the connection link 7 And a link link pin 8 slidably mounted in the arc hole 3a provided in the operation lever 3.

The reclining device is connected to the seat back bracket 1 and the seat cushion side bracket 2 so that they can be switched between a lock-off state in which the seat back side bracket 1 can be tilted and a lock state in which the seat tilt side cannot be tilted. Then, it is locked by tilting upward. The reclining device is also provided with a free zone that does not enter a locked state when the seatback bracket 1 is tilted forward from a predetermined angle.

The operating lever 3 has an operating knob mounting structure at one end, an arc hole 3a at the other end, a connecting link pin 8 that is slidably mounted in the arc hole 3a, and the connecting link pin 8. The connection link 7 is connected to the release link 6. The arc hole 3a moves with the tilt of the operation lever 3, but the connecting link pin 8 does not interlock with the sliding of the arc hole 3a in the forward tilt state.

The present invention has the above-described structure for moving the seat back forward, and operates as follows.

By tilting the operation lever 3 downward, the reclining device is in a lock-off state, and the seat back bracket 1 can be moved forward. At this time, the seat back side bracket 1 can be locked at an arbitrary position within a predetermined angle. This state is the forward tilt state of the seat back in the present invention. Further, since the arc hole 3a of the operation lever 3 is formed in an arc shape within a predetermined angle that maintains the forward tilt state, the connecting link pin 8 does not interlock with the tilt of the operation lever 3.

When the seat back side bracket 1 is further tilted to a state where the seat back is tilted forward, the stepped portion 4 provided at the lower end of the seat back side bracket 1 is released as shown in FIG. And the release link pin 5 is slid. The release link 6 also moves in conjunction with the slide of the release link pin 5, and the connection link 7 connected to the release link 6 by the fixed rivet also slides in the arc hole 3a together with the connection link pin 8. The operating lever 3 is tilted downward by sliding of the connecting link pin 8 interlocked with the connecting link 7, and the operating lever 3 is held with the reclining device in the lock-off state as shown in FIG.

When the operation lever 3 holds the reclining device in the lock-off state, the seat back side bracket 1 can be tilted beyond the lock-off region of the reclining device. This state is a state where the seat back is greatly collapsed in the present invention.

As described above, the seat back forward tilting apparatus of the present embodiment can operate the reclining device without changing the normal operation in the forward tilt state of the seat back, and further requires tilting to the tilted state. By further tilting the seat back side bracket 1, the step 4 of the seat back side bracket 1 contacts the release link 6, and the release link 6 is released by sliding in the arc hole 2a of the seat cushion side bracket 2. The connecting link 7 connected to the link 6 also slides in the arc hole 3a of the operating lever 3, and as the connecting link 7 slides, the operating lever 3 tilts in the lock-off direction of the reclining device, and the step 4 is the release link 6 , The operation lever 3 is held in the lock-off state, and the seat back side bracket 1 can be tilted beyond the lock-off region of the reclining device. The seat back bracket 1 can be moved from the forward tilted state to the largely tilted state by a single operation of the operation lever 3.

1 Seat back bracket
2 Seat cushion side bracket
2a Circular hole
3 Control lever
3a Arc hole
4 steps
5 Release link pin
6 Release link
7 Link
8 Link pin

Claims (3)

A vehicle seat that can be used by switching between a forward-tilted state in which the seat back attached to the seat cushion is tiltable forward and a large-tilted state in which the seat back is tilted forward rather than the forward-tilted state. A seat back side bracket having an abutment portion, a seat cushion side bracket attached to the seat cushion side, and a perforated seat cushion, and a relative rotation of the seat back side bracket and the seat cushion side bracket are locked and locked off. A reclining device having a lock mechanism, a perforated operation lever that is connected to the reclining device and switches between locking and lock-off, and is slidably mounted in the perforation of the seat cushion side bracket. A release link that contacts the contact portion, and a link that is connected to the release link. A connecting link that is slidably mounted in the perforation of the operation lever, the reclining device is locked off by the rotation of the operation lever, and the seatback side bracket is in a forward inclined state. The seat back forward tilting device is characterized in that the contact portion of the seat back side bracket tilts without contacting the release link. 2. The seat back forward tilting device according to claim 1, wherein when the seat back side bracket is moved from the forward tilted state toward the largely tilted state, the contact portion of the seat back side bracket is the release link. And the release link is slid in the perforation of the bracket on the seat cushion side so that the connection link is connected to the release link, and the connection link is also slid in the perforation of the operation lever. A seatback forward-turning device, wherein the operation lever is tilted in a lock-off direction of the reclining device, and the contact portion is kept in contact with the release link, whereby the operation lever is held in the lock-off state.
2. The seat back forward-turning device according to claim 1, wherein the perforation of the operation lever is formed in an arc shape centering on a rotation center of the operation lever, and the operation lever is operated to When tilting, the connecting link is not interlocked with tilting of the operation lever, and the seat back is moved forward.

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