JPH0114206Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a seat reclining device that tilts a seat back constituting a seat back and forth.

Conventionally, this type of seat reclining device has a plate-shaped base plate 1 fixed to a seat cushion A, and a seat back B fixed to the outside of the base plate 1, as shown in FIGS. 1 and 2, for example. A plate-shaped arm 2 is rotatably attached to the base plate 1 by a shaft pin 3, and teeth 4 having a large number of gears 4a carved concentrically with the shaft pin 3 on the outer periphery are integrally attached to the base plate 1. A tooth 5 equipped with a gear 5a that meshes with the gear 4a is pivotally attached to the seat side of the arm 2, while an operating lever 7 is rotated by a shaft pin 3 on the outside of the arm 2. An engaging piece 8 is fixed to the seat side of the arm 2 coaxially with the pivot shaft 6 of the operating lever 7, and an engaging pin 9 provided on the engaging piece 8 is attached to the tooth 5. The gears 4a, 5a are engaged with the formed engagement groove 10, and the gears 4a, 5a are engaged or disengaged by rotating the operation lever 7, and the gears 4a, 5a are brought into a desired rotational angular position with respect to the base plate 1. There is one in which the arm 2 is fixed and the seat bag B supported by the arm 2 is tilted back and forth. In addition, Figures 1 and 2
In the figure, 2a is a reinforcing bead provided on the periphery of the arm 2, 11 is a spring that biases the operating lever 7 to ensure the meshing state of both gears 4a and 5a, and 12 is the shaft pin of the arm 2. A spiral spring 3 is wound around the seat bag B and urges the arm 2 in a direction to tilt the seat bag B forward, and 13 is a dust cover.

However, in such a conventional seat reclining device, when the seat back is tilted forward, the gear 4a is exposed to the passenger compartment side, which spoils the aesthetics and may come into contact with passengers, small objects, luggage, etc. in the passenger compartment. This had the disadvantage that it was stained with oil.

The present invention has been developed based on the above-mentioned viewpoint, and its purpose is to completely hide each member such as the teeth disposed between the arm and the base plate from the outside, and to The object of the present invention is to provide a seat reclining device that eliminates the above-mentioned drawbacks.

The gist of the present invention is that the lower teeth are integrally formed on the base plate, and
This seat reclining device is formed by forming a stepped part with the lower tooth side facing outward, and on the other hand, forming a covering flange part on the periphery of the arm that protrudes toward the base plate side and hides the lower tooth from the outside. .

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the embodiment shown in FIGS. 3 and 4, the seat reclining device includes a plate-shaped base plate 1 fixed to a seat cushion, and a pivot pin 3 fixed to the seat back and rotated on the outside of the base plate 1. It has a plate-shaped arm 2 which is freely pivotable.

In this embodiment, the base plate 1 has a plate base 1a fixed to the seat cushion.
and a lower teeth part 20 that is integrally formed on the upper part of the plate base 1a and has a gear 20a along the upper edge. A fixing hole 21 for fixing the shaft pin 3 of the arm 2 is provided in the center of the lower tooth portion 20. A stepped portion 22 is formed between the plate base 1a and the lower tooth portion 20, with the lower tooth portion 20 side offset outward from the plate base 1a.

Further, the arm 2 has the lower tooth portion 20.
A covering flange portion 23 extending toward the base plate 1 is formed on the peripheral edge of the arm 2 excluding the attachment portion 2b to the seat bag. Then, this covering flange portion 2
3, in order to prevent interference with the base plate 1,
The covering flange portion 2 extends to a position close to the plate base 1a and is located at the lower edge of the arm 2.
3 is the plate base 1a when the arm rotates twice.
It is now possible to move along the

Furthermore, the lower tooth portion 2 of the base plate 1
A holder plate 24 is provided coaxially with the shaft pin 3 of the arm 2 on the zero seat side, and a gear 25a that meshes with the gear 20a of the lower tooth portion 20 is provided between the holder plate 24 and the arm 2. The provided upper tooth 25 is pivotally supported by a pivot 32, and an engaging piece 8 coaxial with the pivot 6 of the operating lever 7 disposed on the outside of the arm 2 is provided. This engagement piece 8 is attached to the atsupatotooth 25
It has an engagement protrusion 27 that protrudes toward the side and fits into an engagement recess 26 formed in the top tooth 25. In normal conditions, this engagement piece 8 is interposed between the holder plate 24 and the holder plate 24. The biasing force of the spring 28 presses the top tooth 25 downward and engages the top tooth 25 with the lower tooth part 20. On the other hand, when the operating lever 7 is rotated, the top tooth 25 is pushed upward and the top tooth 25 is pushed upward. 25 and the lower tooth portion 20 are disengaged from each other. In FIGS. 3 and 4, 2a is a reinforcing bead provided on the periphery of the arm 2, and 12 is a reinforcing bead that has one end locked to the cut-and-raised piece 24a of the holder plate 24 and the other end to the shaft pin 3 of the arm 2. a spiral spring that is fixed and biases the arm 2 in the forward tilting direction of the seat back; 13 is a dust cover; 29
and 30 are guide pins and guide grooves for preventing the arm 2 from wobbling when the arm 2 rotates, and the guide pin 29 is slidably fitted into the guide groove 30 to connect the arm 2 and the base plate. It acts as a rotation stopper between 1 and 2.

Therefore, according to the seat reclining device according to this embodiment, the covering flange portion 23 at the periphery of the arm 2 is attached to the plate base 1 of the base plate 1.
Since it extends to a position close to a, the outer peripheral edge of the lower tooth portion 20 offset outward from the plate base 1a is completely covered by the covering flange portion 23, and meshes with this lower tooth portion 20. The upper tooth 25 and the engaging piece 8 of the operating lever 7, as well as the spring 28 that biases the operating lever 7 via the engaging piece 8, are completely hidden by the covering flange part 23, and the lower tooth part There is no need to worry about other members being visible from the outside, including the meshing portion between 20 and the top tooth 25. At this time, a minute gap 31 is inevitably formed between the covering flange part 23 and the plate base 1a of the base plate 1, but the covering flange part 23 extends to a position opposite to the peripheral wall of the plate base 1a. Therefore, even if the plate base portion 1a is formed across the front and rear sides of the base plate 1, each member inside the arm 2 will not be visible through the minute gap 31.

Further, in this embodiment, the covering flange portion 23 increases the rigidity of the arm 2 itself, and the support strength of the seat back is improved accordingly.

Furthermore, in the above embodiment, the lower tooth portion 2
0 is formed integrally with the base plate 1, the installation width of the seat reclining device can be made narrower compared to the case where a separate lower tooth is provided outside the base plate 1, and accordingly,
A wide operating space for the seat reclining device can be secured.

In the above embodiment, the covering flange portion 2
3 is formed on the periphery of the arm 2 except for the attachment part 2b to the seat bag, but the invention is not limited to this, and the covering flange part 23 may be formed on the entire periphery of the arm 2. Furthermore, the shape, dimensions, etc. of the pair of teeth 20, 25 and the Atsupa tooth 2
5 and the operating lever 7 are not necessarily limited to those shown in the above-mentioned embodiments, and the same ones as conventional ones may be used, and the design may be changed as appropriate. Furthermore, the shape of the plate base 1a of the base plate 1 is not necessarily limited to the shape shown in the above embodiment, and it goes without saying that the design can be changed as appropriate depending on the shape of the arm 2, etc.

As explained above, according to the seat reclining device according to the present invention, the lower tooth portion is integrally formed on the base plate, and a stepped portion is formed with the lower tooth portion side facing outward, while the periphery of the arm is provided with a stepped portion. Since the cover flange part is formed to protrude toward the base plate side and hide the lower tooth part from the outside, the cover flange part completely covers the lower tooth part and its surrounding parts from the outside, and there is no space between the arm and the base plate. It is possible to completely hide the provided teeth and other members, thereby improving the appearance of the seat reclining device from the outside, and preventing passengers and luggage inside the vehicle from coming into contact with the teeth and the like. It is possible to prevent the situation from getting dirty.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional seat reclining device seen from the seat side, and Figure 2 is a side view of a conventional seat reclining device.
3 is an exploded perspective view showing an embodiment of the seat reclining device according to the present invention, and FIG. 4 is an installation sectional view of FIG. 3. A... Seat cushion, B... Seat back, 1... Base plate, 2... Arm, 20
...Lower tooth section, 7...Operation lever, 22...
Stepped portion, 23...Covered flange portion, 25...Atsupatoosu.

Claims (1)

[Claims for Utility Model Registration] A base plate fixed to the seat cushion, an arm fixed to the seat bag and rotatably pivoted to the outside of the base plate, and a base plate provided on the arm and the base plate and meshing with each other. In the seat reclining device, the seat reclining device includes a lower tooth and a top tooth for fixing the arm at a desired rotational angle position with respect to the base plate, and an operating lever for operating one of the teeth to engage and disengage the meshing of both teeth, wherein the lower tooth is attached to the base plate. A step part is formed in which the lower tooth part side is offset toward the outside.Meanwhile, a covering flange part is provided on the periphery of the arm that protrudes toward the base plate side and hides the lower tooth part from the outside. A seat reclining device characterized by forming.