JPS64116Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a seat reclining device in which a seat back of a seat can be tilted to an arbitrary angular position with respect to a seat cushion.

(Prior Art) As shown in FIG. 1, a conventional seat 100 equipped with a reclining device 104 can be moved to a proper inclination angle position by moving the seat back 103 by operating an operation dial 120 according to the passenger's preference. However, because the position of the operation dial 120 is limited due to its structure, it is difficult to operate depending on the vehicle.

For this reason, in U.S. Patent No. 3401979, the remote control shaft of the rotary handle and the control shaft of the external gear of the reclining device are connected by a flexible shaft, and the external gear is operated via the flexible shaft by rotational operation of the rotary handle. It has been proposed that the seat back is tilted forward and backward by rotating an internal gear that meshes with an external gear.

(Problems to be Solved by the Invention) However, since the seat back is tilted back and forth by rotating the rotary handle, there is a drawback that the rotational force of the rotary handle is very heavy.

The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks, and to provide a seat reclining device in which the operation dial is located in a position where it can be easily operated by the occupant, and the rotational operation force can be reduced. .

(Means for Solving the Problems) Therefore, the present invention provides a reclining device in which a tilting bracket fixed to a seat bag is pivotably tilted by a pivot with respect to a fixed bracket fixed to a seat cushion. A sector gear is fixed to one of the fixed bracket and the tilting bracket, a plate having a lock gear that removably engages with the sector gear and locks both brackets in the tilted position is pivotally mounted to the other, and the plate is pivoted to the pivot, A cam dial that swings and holds the plate in the lock position is pivotally mounted, the cam dial and the plate are connected by a connecting piece that swings and holds the plate in the unlock position, and the operation dial and the plate are connected by a connecting piece that swings and holds the plate in the unlock position. It is characterized in that it is connected to the cam dial by an endless belt member.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 2, a seat 1 includes a seat cushion 2, a seat back 3, and a reclining device 4 that connects the seat cushion 2 and the seat back 3 in a tiltable manner.

As shown in Figure 3, 5 is the seat cushion 2.
A fixed bracket 6 is fixed to the seat bag 3, and a tilting bracket 6 is fixed to the seat bag 3. The fixed bracket 5 and the tilting bracket 6 are pivotally connected by a pivot shaft 7 so as to be freely tiltable.

A sector gear 8 is fixed to the inner peripheral surface of the cylindrical case portion 6a of the tilting bracket 6. 9 is a cam rotatably fitted to the lower part of the pivot 7; 10 is a dial rotatably fitted to the upper part of the pivot 7; the cam 9 and the dial 10 are integrally fixed with a key 23, etc. . Reference numeral 11 denotes a support shaft provided protruding from the fixed bracket 5, and 12 represents a plate swingably attached to the support shaft 11, which forms a contact portion 13 on the outer peripheral end surface that comes into contact with the cam 9, as shown in FIG. . 14
A lock gear is integrally attached to one side of the plate 12 with a pin 15, and is removably engaged with the sector gear 8. A spiral spring (not shown) is provided to normally bias the tilting bracket 6 forward. 16 is pivotally connected to the cam at one end with a pin 18, and pin 1 of the plate 12 is inserted into the elongated hole 17 at the other end.
As shown in FIG. 4, when the dial 10 is rotated to the unlocked position via the belt 22 by operating the operation dial 20, the plate 12 is pulled down via the coupling piece 16, and the plate 12 is pulled down. When the lock gear 14 is disengaged from the sector gear 8 (see FIG. 6) and the dial 10 is rotated to the lock position, the pin 19 of the plate 12 is allowed to freely slide within the elongated hole 17. That is, when the dial 10 rotates to the lock position, the cam 9 integrated with the dial 10 pushes down the plate 12 so that the lock gear 14 of the plate 12 meshes with the sector gear 8 (see FIG. 5), while at the same time The elongated hole 17 prevents the piece 16 from interfering with the pin 19. Reference numeral 24 denotes a tension coil spring installed between the fixed bracket 5 and the dial 10, and its elastic force always biases the dial 10 in the counterclockwise direction. Further, 20 is an operation dial rotatably supported on the shaft 21 of the fixed bracket 5, and 22 is an endless belt installed between the operation dial 20 and the dial 10.

With the above configuration, when the operation dial 20 is rotated clockwise against the tension coil spring 24 as shown in FIG. 4, the cam 9 rotates together with the dial 10 which is interlocked by the belt 22.
When the cam 9 and the contact portion 13 of the plate 12 are separated, the plate 12 is pulled down via the connecting piece 16, and the lock gear 14 of the plate 12 is separated from the sector gear 8, so that the fixed bracket of the tilting bracket 6 is fixed. 5 is released, the tilting bracket 6 (seat back 3) can be tilted forward by the spiral spring, and it can also be tilted backward by pressing against the biasing force of the spiral spring. be.

Although the embodiment described above uses an endless belt, the present invention is not limited to this, and it goes without saying that the same function can be achieved even if a band, chain, etc. are used.

(Functions and Effects of the Invention) As described above, the present invention has a great practical effect because the endless belt member allows the operation dial to be moved from the conventional position to a position that is easier for the passenger to operate from an ergonomic point of view. be.

In addition, by rotating the operating dial, the plate with the lock gear is simply swung between the locked and unlocked positions, and the seat back is tilted forward and backward by the force of the spiral spring and the back pressure of the seat occupant, so the force required to rotate the operating dial is very light.

Furthermore, since the plate is held in the locked position by the cam dial and held in the unlocked position by the connecting piece, locking and unlocking can be performed reliably.

Furthermore, since the operation dial and the cam dial are connected by an endless belt member, assembly is easy, interlocking is smooth, and manufacturing cost is low.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the appearance of a seat equipped with a conventional device, Fig. 2 is a front view showing the appearance of a seat fitted with a device according to the present invention, and Fig. 3 is a part of the device shown in Fig. 2. Figure 4 is a front view showing the state in which the lock is released by rotating the operation dial, Figure 5 is an enlarged view of the main part of Figure 3, Figure 6 is the
It is an enlarged view of the main part of the figure. 1... Sheet, 2... Seat cushion, 3...
... Seat bag, 5... Fixed bracket, 6...
Tilting bracket, 7... Pivot, 8... Sector gear, 9... Cam, 10... Dial, 12... Plate, 14... Lock gear, 16... Connection piece,
20...Operation dial, 22...Endless belt.

Claims (1)

[Scope of Claim for Utility Model Registration] In a reclining device in which a tilting bracket fixed to a seat bag is pivotably tilted to a fixed bracket fixed to a seat cushion, either of the fixed bracket or the tilting bracket A sector gear is fixed to one of the brackets, a plate having a lock gear that removably engages with the sector gear and locks both brackets in a tilted position is pivotally mounted to one of the brackets, and the plate is pivoted to the lock position on the pivot shaft. A cam dial that is pivoted and held is pivotally mounted, the cam dial and the plate are connected by a connecting piece that swings and holds the plate in an unlocked position, and an operation dial is pivoted at a position separated from the pivot shaft. A seat reclining device characterized in that the operation dial and the cam dial are connected by an endless belt member.