JPH071001Y2 - Reclining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a reclining device that supports a seat back so that the seat back can be tilted and adjusted on the rear end side of a seat cushion.

[Conventional technology]

2. Description of the Related Art In a vehicle seat or the like, a reclining device that tiltably supports a seat back with respect to a seat cushion is provided, and the seat can be freely adjusted according to a seated person's body shape or taste. By the way, in this type of reclining device, in order to improve the operability of adjusting the tilt angle of the seat back and the stability of the locked state of the seat back at a predetermined angle position, the left and right side portions of the seat are The reclining device parts are provided in pairs, and the operation can be performed from either the left or right side.By incorporating a stepped meshing lock mechanism such as a ratchet in the device parts on both sides, respectively. Conventionally, a so-called double-sided reclining device type has been known which is capable of obtaining an appropriate and reliable tilting adjustment operation of a seat back and a locked state at a required adjustment position.

[Problems to be solved by the device]

However, according to such a double-sided device type reclining device, it is difficult to obtain the interlocked operation and locked states in the device parts on both sides of the seat, and the problem of synchronization deviation is unavoidable.
That is, in each device unit in such a reclining device, a base plate (hereinafter, referred to as a base) provided on the seat cushion side and an arm plate (hereinafter, referred to as an arm) provided on the seat back side are relatively rotatable and adjustable. With a stepwise meshing lock mechanism that is configured and intervenes between these bases and arms and that can lock them at the required tilt angle, the ratchet teeth, their meshing, and the operating lever that operates the meshing release. Was configured. Then, in order to obtain the interlocked operation and locked state of the device unit on both sides of these seats, a connecting shaft or the like for connecting them is required.Even with such a connecting shaft, the connecting shafts are twisted and the like on both sides. It is difficult to completely eliminate the synchronization deviation of the, and there is a risk that it may cause a problem such as a lock failure on only one side, which causes a problem in obtaining proper and reliable reclining performance. .

Further, in the mechanically locking reclining device configuration as described above, when a shock or the like is applied, an excessive load is applied between the base and the arm due to the influence of inertia, which causes deformation of the frame, etc. Therefore, it is desired to take some measures capable of solving these problems.

[Means for Solving the Problems]

In order to meet such a demand, the reclining device according to the present invention is provided on both left and right sides of the seat to support the lower end of the seat back at the rear end side of the seat cushion so that the reclining device operates in conjunction with each other. At least one of the device parts is provided with a constant mesh adjustment structure that allows relative rotational displacement between a base provided on the seat cushion side and an arm provided on the seat back side by meshing the tooth portions. In addition to the above structure, a friction lock mechanism for binding and loosening the movement of one of the teeth is interlocked with the movement of the other device through a transmission means.

[Action]

According to the present invention, at least one of the device parts is a constantly meshing adjustment structure by a friction lock mechanism that interlocks with the movement of the other device part via a transmission means, and yet with respect to an overload or the like, Since it is configured to absorb some positional deviation, the friction lock mechanism normally works to secure the locked state at the required tilting position, and when an overload is applied, it is absorbed and It is possible to prevent the adverse effect on.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

1 and 2 show an embodiment of a reclining device according to the present invention. In these figures, a vehicle seat generally designated by reference numeral 1 is a seat cushion 2 and a seat cushion 2 as shown in FIG. The seat back 3 and the like are installed upright on the rear end side so as to be tiltable. In the case of the vehicle seat 1, as is well known, the seat cushion 2 is supported by a pair of left and right slide rails (not shown) or the like on the floor surface of the vehicle compartment so as to be movable and adjustable in the front-back direction of the seat 1. However, detailed description thereof will be omitted.

Reference numeral 10 is a left and right device including bases 11 and 11 and arms 12 and 12 and pivot portions 13 and 13 thereof as a pair of plates attached to a seat cushion 2 and a seat back 3 which constitute the vehicle seat 1 described above. This is a double-sided device type reclining device consisting of parts 14 and 15, and its details are as shown in FIG.

To explain this in detail, as shown in FIGS. 1 and 2, the left side device portion 14 is directly (or via a link or the like) to the tip of the lever 16 by an operation lever 16 for manual operation of the reclining device 10. 17 indirectly provided)
However, it is configured as a driving side device constituted by a well-known stepwise meshing type lock mechanism 19 that selectively meshes with ratchet teeth 18 provided on the arm 12 and the like. 16
a is the support shaft of the operating lever 16, and the claw portion 17 of this lever 16
A biasing means (not shown) applies a biasing force to the ratchet teeth 18 in a direction in which the ratchet teeth 18 are constantly meshed.

According to the present invention, in the above-described structure, the left and right device units 14 and 15 are provided on both the left and right sides of the seat 1 for tiltably supporting the seat back 3 and are operated in conjunction with each other. At least one of the two (the right side device portion 15 on the driven side in this embodiment) is seat cushion 2
The base 11 provided on the side of the seat and the arm 12 provided on the side of the seat back 3 are configured to have a constantly meshing structure that allows relative rotational displacement by meshing of the pinion 20 and the ratchet teeth 21, and Pinion which is the tooth part of
Rotate 20 to operate lever 16
It is characterized in that a friction lock mechanism 23 having a drum brake structure that is tightly bound and loosened by being interlocked with a flexible wire 22 which is a transmission means is attached to the movement of the above.

Here, in FIG. 1, 24 is a drum integrally provided on the shaft portion of the pinion 20, 25 is a cup body fitted in the drum 24, and 26 is a drum between the drum 24 and the cup body 25.
A coil spring wound around 24. The coil spring 26 binds and loosens the drum 24 by a pulling force or a loosening force acting on the wire 22, and rubs the drum 24 to the cup body 25 on the fixed side. The structure is such that it can be fixed by force or can be rotated, and its details are well known. The friction lock mechanism 23 is not limited to the structure of this embodiment, and various modifications may be considered. Further, 27 in FIG. 1 indicates the movement of the left side device unit 14 on the driving side and the movement on the right side device unit on the driven side.
A tube for laying the wire 22 transmitted to 15 and 28 are brackets for fixing the tube 27 to the base 11 or the like on the fixed side.

Further, in the present embodiment, the detection drum 30 for detecting the rotation of the operation lever 16 is attached to the lever support shaft 16a portion, whereby the movement of the driving side device portion 14 is transmitted to the driven side. , Both sides are configured to function as reclining devices. As a means for detecting the movement on the main driving side and transmitting the movement to the driven side, it is conceivable that a suitable modification such as using a transmission rod or the like can be considered as conventionally known.

According to such a configuration, the right side device unit on the driven side
15 is a friction lock mechanism 23 by a drum brake that is interlocked with the movement of the left side device portion 15 on the driving side through a wire 22 or the like.
As a result, the pinion 20 and the ratchet teeth 21 provide a constant meshing adjustment structure, and even if an overload or the like is configured, a slight positional deviation can be absorbed against the frictional force. Is capable of ensuring a locked state at a desired tilting position by the action of the stepwise meshing type lock mechanism 19 or the constant meshing type friction lock mechanism 23 in the device unit 14 on the driving side, and locks due to the synchronization deviation as in the past. It is possible to solve the problem of causing defects. Note that the drive-side device unit 14 described above may be in a non-locking state depending on the meshing relationship between the tooth portions, but at this time, the friction lock mechanism 23 works to obtain a reliable locked state. . This will be clear from the fact that the friction force of the coil spring 26 on the drum 24 having a larger diameter is stronger than that of the pinion 20 and the locking can be performed easily. Further, even if an overload is applied at the time of a collision or the like, the energy can be properly and surely absorbed by the frictional force in the friction lock mechanism 23 to prevent adverse effects on each part such as frame deformation.

The present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the reclining device 10 including the stepwise meshing type lock mechanism 19 and the constant meshing type friction lock mechanism 23 may be used as necessary. You can freely change and change it,
Various modifications are conceivable. Further, it goes without saying that the reclining device 10 according to the present invention is not limited to the vehicle seat in the above-described embodiment.

[Effect of device]

As described above, according to the reclining device of the present invention, at least one of the device parts provided on both the left and right sides of the seat for being tiltably supported and operated in conjunction with each other is provided. , The seat cushion side base and the seat back side arm are configured by a constant meshing adjustment structure that allows relative rotational displacement by meshing the tooth portions, and the movement of one tooth portion of the other is Since a friction lock mechanism that binds and loosens in conjunction with the movement of the device section via transmission means is attached, the stepped meshing of the other device section is always performed despite the simple and inexpensive structure. The lock mechanism at the desired tilting position can be secured by the action of the non-locking mechanism or the friction lock mechanism of the constant meshing type. The problem can be solved, and even if an overload is received at the time of a collision, etc., this can be appropriately and surely absorbed by the friction force of the friction lock mechanism, and it is possible to prevent adverse effects such as frame deformation on each part. There are various excellent effects in practice.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a main part configuration showing an embodiment of a reclining device according to the present invention, and FIG. 2 is a schematic perspective view of an entire seat. In the figure, 1 ... Vehicle seat, 2 ... Seat cushion,
3 ... Seat back, 10 ... Reclining device, 11 ...
… Base (plate), 12 …… Arm (plate), 13
...... Axis part, 14, 15 ...... Left, right side device part, 16 …… Operating lever, 17 …… Pawl part, 18 …… Ratchet tooth, 19 …… Step-meshing lock mechanism, 20 …… Pinion, 21 …… ratchet teeth, 22 …… flexible wire, 23 …… constant mesh friction lock mechanism, 24 …… drum, 25 …… cup body,
26 ... Coil spring, 30 ... Detection drum.

Claims (1)

[Scope of utility model registration request] 1. A reclining device comprising a pair of device portions which are provided on both left and right sides of a seat to tiltably support a lower end portion of a seat back at a rear end side of a seat cushion and which are operated in conjunction with each other. In the above, at least one of the device parts is provided with a constant mesh adjustment structure that allows relative rotational displacement between a base plate provided on the seat cushion side and an arm plate provided on the seat back side by meshing the tooth portions. A reclining device characterized in that a friction lock mechanism is provided, which is configured to bind and loosen the movement of one of the tooth portions with the movement of the other device portion via a transmission means.