JPH0529937Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reclining device provided in a seat of a vehicle or the like.

[Conventional technology]

2. Description of the Related Art Seats in automobiles and the like are equipped with reclining devices that adjust the inclination angle of the seat back so that a seated person can assume a desired sitting posture.

Conventionally, in this reclining device, a rotating plate to which a seat back is connected is rotatably supported in the front-rear direction on a base plate fixed to the seat cushion side, for example, and this rotating arm is moved forward by a return spring. The rotating arm is provided with a sector gear and a lock member on the base plate side that is engaged with the sector gear.When adjusting the reclining, the lock member is operated to engage the sector gear. The inclination angle of the seat back can be adjusted arbitrarily by disengaging the seat back, pushing the seat back backward against the biasing force of the return spring, and engaging the locking member with the sector gear again when the desired inclination is achieved. It is done as if it were an adjustment.

[Problem that the invention attempts to solve]

Conventionally, this type of reclining device has only the function of adjusting the inclination angle of the seatback, that is, the function of fixedly locking the seatback at a desired inclination angle, and does not have other functions, so it does not provide a more comfortable seating feeling. I couldn't get it.

The present invention was developed in view of these points, and utilizes the elasticity of biasing members such as return springs in existing reclining mechanisms to provide the seat back with a flexing function even in its locked state, thereby providing a comfortable cushioning effect. This was done so that it could be obtained.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention consists of a base plate fixed to the seat cushion side, a rotating shaft that is rotatably supported in the front and back direction on a shaft provided on the base plate, and is connected to the seat back. a plate, a biasing member whose one end is locked to the shaft and whose other end is locked to the rotation plate to bias the rotation plate forward; and the shaft is rotatable in the same direction as the rotation plate. It is equipped with a sector gear that is pivotally supported, and a locking member that is disposed on a base plate and is engaged with and detached from the sector gear, and that has a rotating plate that corresponds to the front and rear side edges of the sector gear, respectively, and has a required play with the sector gear. The stopper is provided with a stopper that abuts and engages.

[Effect]

The means described above operate as follows.

When the sector gear is locked by the lock arm, when an occupant sits down and leans against the seat back, the load causes the seat back, that is, the rotation plate, to move against the locked sector gear by the amount of play in the return spring. The seat back is tilted backward against the biasing force, and at this time, the seat back exerts a flexing function due to the elastic repulsive force of the return spring, and the occupant is elastically supported.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 shows the entire reclining device of the present invention, and 2 is a base plate of this reclining device 1, which is fixed to the rear end of one side of the seat cushion Sc.

A shaft 3 is protruded from the upper part of the base plate 2, and a rotating plate 4 is rotatably supported on this shaft 3 so as to be rotatable in the front-rear direction.This rotating plate 4 is fixed to the frame 5 of the seat bag Sb. ing.

Further, a return spring 6 made of a spiral spring is wound around the tip of the shaft 3, and the inner end 6a of the return spring 6 has a notch-shaped engagement portion 7 formed at the end of the shaft 3.
The outer end 6b is locked to a locking piece 8 formed in a cut-out shape on the rotating plate 4, and the biasing force of the return spring 6 causes the rotating plate 4 to rotate. It is always urged forward to rotate.

Further, a sector gear 9 is coaxially supported on the base plate 2 so as to be rotatable in the front-rear direction.

Stoppers 10a and 10b are cut and raised on the rotating plate 4 so as to correspond to the front and rear edges 9a and 9b of the sector gear 9 at a required interval, and the rotating plate 4 and the sector gear 9 are provided with front and rear stoppers 10a. , 10b and front and rear side edges 9a, 9b
It is possible to rotate in the front and back direction within the range in which the two are engaged.

Further, a lock arm 11 is pivotally supported at the lower part of the base plate 2 by a pin 12 in correspondence with the sector gear 9. This lock arm 11 is
A gear portion 11a that meshes with the sector gear 9 at its rear end.
is formed, and a coil spring 14 stretched between the front half thereof and a pin 13 protruding from the base plate 2 biases the gear portion 11a so that it always meshes with the sector gear 9, and this lock arm A handle 11b is attached to the front end of the handle 11.

Next, the operation of the reclining device of the present invention constructed as described above will be explained.

Now, when the lock arm 11 is engaged with the sector gear 9 and no load is applied to the rotation plate 4, that is, the seat back Sb, the rotation plate 4 is urged to rotate forward by the biasing force of the return spring 6. Front stopper 10a is sector gear 9
The rotary plate 4, that is, the seat back Sb, is held in place by the front edge 9a of the sector gear 9, and in this state, the rear edge 9b of the sector gear 9 and the rotary plate 4 are engaged with each other. There is a gap (hereinafter referred to as play gap) a between the rear stopper 10b and the rear stopper 10b.

Then, in this state, the passenger is seated and the seatback is
When leaning against Sb, the rotating plate 4 becomes able to rotate rearward by the play distance a against the sector gear 9 against the biasing force of the return spring 6 due to the load, and the rotating plate 4, that is, the seat back Sb exhibits a bending function due to the elastic repulsive force of the return spring 6 within the play interval a,
The seated person can enjoy a comfortable cushioning effect similar to that of, for example, an office chair.

Further, when changing the inclination angle of the seat back Sb, a normal reclining operation may be performed. That is, when the handle 11b of the lock arm 11 is pulled upward, the gear portion 11a is removed from the sector gear 9, and the sector gear 9 is unlocked.
The rotating plate 4 tries to rotate forward together with the sector gear 9 by the biasing force of the return spring 6, but when the seat back Sb is pressed with the back, the rotating plate resists the biasing force of the return spring 6. 4 to the rear, the front stopper 1
0a is spaced apart from the front edge 9a of the sector gear 9, and the rear stopper 10b is spaced apart from the rear edge 9b of the sector gear 9.
is pressed, whereby the sector gear 9 is rotated together with the rotation plate 4.

When the user releases the handle 11b of the lock arm 11 with the seat back Sb tilted to a desired angle of inclination, the gear portion 11a of the lock arm 11 is engaged with the sector gear 9 by the biasing force of the coil spring 14. The sector gear 9 is locked again, and the front stopper 10a of the rotating plate 4 is brought into contact with the front edge 9a of the sector gear 9 by the biasing force of the return spring 6, thereby locking the rotating plate 4, that is, the seat back. Sb
will be held in its inclined state.

Of course, even in this reclining state, the cushioning effect of the seat back Sb can be obtained as described above.

Further, when the seat back Sb is further reclined to a so-called full reclined state, a best cushioning effect can be obtained due to the bending function of the seat back Sb.

In addition, in the configuration of this example, the stopper 10
a, 10b are cut and raised on the rotating plate 4 and are fixed, but these stoppers 10a, 1
By configuring 0b to be movable and adjustable by an adjustment mechanism such as a screw mechanism, the rotation plate 4
It is also possible to adjust the amount of deflection of the seat back Sb arbitrarily by changing the range of the play interval a between the sector gear 9 and the sector gear 9.

In addition, by providing an arcuate elongated hole of a required length around the pivot point on one side of the rotation plate 4 and the sector gear 9, and a pin that engages with the hole protruding from the other, the front and rear ends They may be engaged with a required play interval.

[Effect of idea]

As described above, according to the reclining device of the present invention, the sector gear is engaged with the rotating plate that is rotated and biased forward by the biasing member with the required play interval, so that the seat back is not seated. Due to the load, it is possible to tilt backward by the amount of play, and within this play, the deflection function is exerted by the elastic repulsive force of the biasing member.
In addition to the normal reclining function, the seated person can obtain a comfortable cushion effect similar to that of an office chair, further improving the feeling of sitting, and when the seat back is fully reclined, the flexing function provides a cushion effect similar to that of a vest. The practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a side view of the reclining device of the present invention, FIG. 2 is a rear view thereof, and FIG. 3 is a side view of the reclining device for explaining the operation. In the figure, Sc is a seat cushion, Sb is a seat back, 2 is a base plate, 3 is a shaft, 4 is a rotating plate, 6 is a return spring as a biasing member, 9 is a sector gear, 10a and 10b are stoppers, and 11 is a lock member. It is a lock arm.

Claims (1)

[Scope of Claim for Utility Model Registration] A base plate fixed to the seat cushion side; A rotation plate rotatably supported in the front and rear direction on a shaft provided on the base plate and connected to the seat bag; one end of the base plate; is locked to the shaft, and the other end is locked to the rotation plate to bias the rotation plate forward, and the shaft is rotatable in the same direction as the rotation plate. a sector gear that is pivotally supported by the sector gear; and a locking member that is disposed on the base plate and is engaged with and detached from the sector gear, and the rotary plate corresponds to the front and rear side edges of the sector gear, respectively; A reclining device comprising a stopper that abuts and engages the sector gear with a required play.