JPH0742346Y2 - Double lock reclining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vehicle seat device, and more particularly to a dual lock reclining device.

[Prior Art] Generally, a seat device for a vehicle such as an automobile is provided with a reclining device capable of tilting a seat back of a seat in a front-rear direction so that an occupant can comfortably take an optimal sitting posture. In this reclining device, an arm pivotally supported by a base plate fixed to a seat cushion is fixed to a seat back so as to be tiltable at a predetermined angle via a reclining adjustment mechanism attached to the base plate. The reclining adjustment mechanism includes a tooth member that is integrally connected to one end of the arm or the arm, and a ratchet that is axially supported by the base plate so as to be disengageable from the tooth member.
This is a configuration in which an operating lever for swinging the same is provided. The operation lever is provided with a cam that engages and disengages with the ratchet and is rotatably supported by the base plate (see Japanese Utility Model Publication No. 55-51310 and Japanese Utility Model Publication No. 62-34840).

By the way, recently, reclining devices are often arranged symmetrically on the left and right sides of the seat. However, when the reclining devices are arranged on both the left and right sides of the seat in this manner, when the seat back is tilted, the reclining devices have tooth members and ratchets that mesh with them, so that the meshing between them is released,
Or, since the trouble of having to operate the locking adjustment mechanism separately for the left and right occurs, if one of the left and right is operated, the other is linked to the movement. In this interlocking structure, the left and right reclining devices have the same structure, and their operating levers are connected to each other by a wire to enable interlocking.

[Problems to be Solved by the Invention] However, in the case of interlocking with the above wires, it is necessary to simultaneously operate the ratchets of the left and right reclining devices to engage (lock) or unlock the tooth member. The meshing of the two may be inconsistent due to the variation of. For that, the vehicle floor,
The precision of each part of the seat frame, the slide, and the reclining device itself has to be considerably improved, which has a drawback of increasing cost.

This invention has been made for the purpose of eliminating the above-mentioned drawbacks.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a pair of reclining devices that rotate a ratchet by a cam that is rotated by an operating lever to engage and disengage the ratchet and the tooth member. By providing the pair of reclining devices on the left and right sides of the seat back so that the pair of reclining devices can be interlocked with each other, when the main reclining device is operated, the sub-reclining devices are interlocked with each other, so that the seat back can be locked and unlocked. In the above-mentioned one of the master-slave reclining device, a guide plate which is rotatable in conjunction with an operation lever thereof is provided, a guide hole having a step portion is formed in the guide plate, and the guide plate is engaged with the guide hole. By projecting the pin on the ratchet, the lock of the master-slave reclining device can be delayed. Both rock reclining devices were constructed.

[Operation] According to the above configuration of the present invention, when the operation lever of the main reclining device is raised and rotated, the sub-reclining devices are interlocked, and the cams of both the main and sub-reclining devices rotate to rotate the ratchet. By moving
Both locks are released at the same time. On the other hand, when the seat back is set to a desired inclination angle and then the operation lever is released, the ratchet of the one reclining device that does not include the guide plate meshes with the tooth member by the cam rotating the ratchet, In the ratchet of the other reclining device provided with the guide plate, the guide plate rotates to move the pin step portion, and the ratchet rotates faster than the one reclining device to engage with the tooth member. In this way, the locks of the master-slave reclining device are made to have a time lag, so that the meshing of both the master-slave and the master-slave will not be inconsistent.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. First
As shown in the figure, the main reclining device is configured as follows. A tooth member 4 is integrally fixed to an arm 3 rotatably attached to a base plate 1 via a shaft 2, and a ratchet 5 having a tooth portion 5a that meshes with a tooth portion 4a of the tooth member 4. Is rotatably mounted on the shaft 6. As shown in FIG. 2, the ratchet 5 has cam projections 5b and 5c and a cam recess 5d, and a cam 7 that engages and disengages with the cam projections 5b and 5c is rotatable together with an operating lever 8 via a shaft 9. It is pivotally attached to the base plate 1. One end of a spring 10 is connected to the operating lever 8, the other end of the spring 10 is connected to the base plate 1, and the operating lever 8 is always biased to rotate counterclockwise. Axis 2,6,
9 are pivotally supported by the base plate 1 and the reinforcing plate 11, respectively, and in particular, the shaft 2 is provided with a spring 12 for biasing the arm 3 to rotate counterclockwise. As shown in FIG. 3, the shaft 9 of the operation lever 8 has an oval cross section,
A through hole 13 in which the end 9a of the shaft 9 is bored in the base plate 1
And a guide plate 15 having an oval shaft hole 14 engaged with the end portion 9a is rotatably and coaxially connected to the back surface of the base plate 1. The guide plate 15 has a substantially fan shape and is provided with a guide hole 17 having a step portion 16 on its arcuate side portion. In this guide hole 17,
A pin 18 projecting from the ratchet 5 penetrates through an arcuate elongated hole 19 formed in the base plate 1 and engages with it. Step 16
Is provided in order to slightly delay the timing at which the cam 7 enters the cam concave portion 5d of the ratchet 5 and pushes the cam convex portion 5c to rotate the ratchet 5 counterclockwise in the drawing, compared with that of the sub-reclining device. Further, in FIG. 1 and FIG. 2, one end of a link 20 is rotatable on the operation lever 8 by a shaft 21, and the other end of the link 20 is rotatable by a back lever 22 via a shaft 23. Are linked to. The back lever 22 is substantially L-shaped, and one end of a wire 24 is connected to an end of an arm 22a of the back lever 22 via a ball end 25. The wire 24 is inserted into the guide tube 26 and extends, and the guide tube 26 is attached to the base plate 1 by the metal fitting 27.
The tube 28 is continuously fixed to the tube 28 and extends from the main reclining device to the sub-reclining device.

As shown in FIG. 4 and a main part thereof, the sub-reclining device has substantially the same structure as the main reclining device. The main difference is that the operation lever 8 in the main reclining device is firstly described. In place of the above, a lever 8a is provided, and the lever 8a is provided on the base plate 1 with metal fittings.
The other end of the wire 24 extending from the tube 28 fixed by 29 is connected, and secondly, the guide plate 15 of the main reclining device is not provided. Since it is the same as the reclining device, detailed description will be omitted.

The guide plate 15 may be provided not in the main reclining device but in the sub-reclining device.

Next, the operation of the above-described embodiment will be described. The operation lever 8 in the main reclining device is pulled upward to rotate against the force of the spring 10, and the cam 7 rotates integrally with the operation lever 8 in the clockwise direction. When the head 7a of the cam 7 enters the cam recess 5d, the guide plate 15 rotates at the same angle, the guide hole 17 moves in an arc shape in the clockwise direction in the drawing, and the pin 18 moves upward from the guide hole 17. Then, the step portion 16 is moved to the lower stage of the slide guide hole 17, and the ratchet 5 is rotated about the shaft 6 in the counterclockwise direction in the drawing to disengage the tooth portions 4a and 5a. Therefore, both the master and slave reclining devices are unlocked at the same time.

Contrary to the above unlocking operation, when locking the unlocked master-slave reclining device, after setting the seat back at a desired angle and releasing the operation lever 8,
The operation lever 8 is rotated counterclockwise by the force of the spring 10, and at that time, the pin 18 engaged with the guide hole 17 of the guide plate 15 in the main reclining device has the guide hole 17 as shown in FIG. Since the step portion 16 of the ratchet 5 rides up, the ratchet 5 is pressed against the tooth member 4 before the head portion 7a of the cam 7 comes into contact with the cam convex portion 5b of the ratchet 5, so that the tooth portions 4a, 5a
Locks together.

However, since the secondary reclining device does not have the guide plate 15, the ratchet is rotated only when the head portion 7a of the cam 7 comes into contact with the cam convex portion 5b of the ratchet 5. Therefore, the sub-reclining device is locked slightly later than the lock of the main reclining device.

[Advantages of the Invention] According to the invention described above, in the interlocking structure of a pair of reclining devices arranged on both left and right sides of one seat device, one of the master and slave reclining devices is interlocked with its operating lever. A guide plate that rotates is provided rotatably, a guide hole having a step is formed in the guide plate, and a pin that engages with the guide hole is provided on the ratchet so as to project. Since the locking operation of the reclining device has a slight time lag, one reclining device can always be locked first when using the reclining device of the same configuration on the left and right, so that the reclining device parts accuracy is higher than necessary. A good locked state can be obtained even if it does not go up, and therefore the cost of both lock reclining devices Can be down.

[Brief description of drawings]

FIG. 1 is a front view of a main reclining device, FIG. 2 is an explanatory view of a main part thereof, FIG. 3 is an exploded perspective view of a main part, FIG. 4 is a front view of a sub-reclining device, and FIG. It is a figure. 1 ... Base plate, 2, 6, 9, 14 ... Shaft, 3 ... Arm, 4 ...
Tooth member, 4a, 5a ... Tooth portion, 5 ... Ratchet, 5b, 5c ... Cam convex portion, 5d ... Cam concave portion, 7 ... Cam, 8 ... Operating lever, 14
... Shaft hole, 15 ... Guide plate, 16 ... Step portion, 17 ... Guide hole, 18 ... Pin, 19 ... Arc-shaped long hole, 20 ... Link, 22 ... Back lever, 24 ... Wire

Claims (1)

[Scope of utility model registration request] 1. A pair of reclining devices for engaging and disengaging the engagement between the ratchet and the tooth member are provided on the left and right sides of the seat back by a cam rotated by an operating lever, and the pair of reclining devices are interlocked. With such a configuration, when the main reclining device is operated, the sub-reclining device is interlocked, and in the vehicle seat device capable of locking and unlocking the seat back, one of the master-slave reclining device is provided with the operation lever. Is provided with a guide plate rotatable in conjunction with the guide plate, a guide hole having a step portion is formed in the guide plate, and a pin that engages with the guide hole is provided on the ratchet so as to project. A dual lock reclining device characterized in that the locks have a time difference.