JP3643859B2 - Reclining device for seat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a seat reclining device for assembling a seat back so that it can tilt forward and backward from a predetermined standing position in a seat for automobiles and the like, and in particular, focuses on a pivot portion that tiltably supports a seat back on a seat cushion. As for improvement.
[0002]
[Prior art]
In general, a seat reclining device includes an upper bracket attached to the side portion of the seat back and a lower bracket attached to the side portion of the seat cushion, and a pivot that is inserted through the opposing plate surfaces of the upper bracket and the lower bracket. In addition, the seat back is assembled to the seat cushion so as to be tiltable before and after a predetermined position.
[0003]
In the reclining device for the seat, in order to simplify the whole mechanism, the pivot is inserted into the plate surface of the lower bracket opposite to the plate surface of the upper bracket, and the flat washer is protruded from the plate surface of the lower bracket. It is fitted to the shaft end side, and the shaft end of this pivot shaft is crushed and formed as a clinching portion. That is, the pivot shaft is fixed to each bracket from a stop hook portion provided on the shaft end side of the upper bracket and a clinch portion by crushing the shaft end. The axis of the pivot shaft is the clinch portion at the lower bracket. It is stopped directly.
[0004]
The pivot shaft has a stop hook portion facing the side portion of the seat back, and an axis line is fixed to the lower bracket side by a clinch portion. For this reason, when the seat back is tilted or returned, the upper bracket side is relatively shifted on the axis of the pivot, and accordingly, the side portion of the seat back is subjected to rotational friction at the stopper collar. When this occurs repeatedly, the side portion of the seat back is damaged by being cut or worn at the contact portion with the stop hook portion.
[0005]
[Problems to be solved by the invention]
The present invention is based on the premise that the whole mechanism is simplified, and is applied by crushing and forming one end of the pivot that is inserted into the opposite plate surface of each bracket as a clinch part, and the pivot is fixed directly to the bracket. Even so, an object of the present invention is to provide an improved seat reclining device that does not cause a situation in which the side portion of the seat back is damaged by the pivot.
[0006]
[Means for Solving the Problems]
In the reclining device for a seat according to claim 1 of the present invention, the seat reclining device includes an upper bracket attached to the side portion of the seat back and a lower bracket attached to the side portion of the seat cushion. The bracket is positioned inside, the lower bracket is positioned outside, the plate surface of each bracket is positioned relative to each other, and the seat back can be tilted with the seat cushion using the pivot that passes through the opposite plate surface of each bracket as a fulcrum The pivot shaft is rotatably supported on the lower bracket side, a retaining hook provided on the shaft end on the lower bracket side, and a clinch portion obtained by crushing and deforming the shaft end side protruding from the plate surface of the upper bracket, The shaft is fixed directly to the upper bracket side.
[0007]
In the reclining device for a seat according to claim 2 of the present invention, a bearing portion fitted and arranged on the axis of the pivot protruding from the plate surface of the upper bracket, and a direction away from the plate surface of the upper bracket from the bearing portion A washer having an outer peripheral flange portion projecting from the outer peripheral flange portion and a shielding cover that is fitted and fixed to the outer peripheral flange portion of the washer with a flat outer surface facing the seat back side, and the pivot is a washer with the clinch portion being a shielding cover. It is configured by enclosing and equipped with.
[0008]
In the reclining device for a seat according to claim 3 of the present invention, the upper bracket is supported by a corrugated washer interposed between the plate surfaces facing the lower bracket on the axis of the pivot so as to be slidably contactable with the lower bracket. It is configured.
[0009]
In the reclining device for a seat according to claim 4 of the present invention, the washer is configured to be fastened and fixed integrally with the upper bracket at the clinch portion of the pivot.
[0010]
In the reclining device for a seat according to claim 5 of the present invention, the shielding cover is configured by fitting a projecting piece standing from the cover body into the retaining hole of the upper bracket and latching and fixing it to the upper bracket.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a description will be given with reference to the accompanying drawings. In the drawings, a seat bracket device mounted on a right side portion of a driver seat is illustrated. The seat bracket device is assembled with an upper bracket 1 attached to the side portion of the seat back B and a lower bracket 2 attached to the side portion of the seat cushion C as shown in FIG.
[0012]
The upper bracket 1 is disposed inside the lower bracket 2 with respect to the seat back B. Also, the lower bracket plate surface is opposed to the rear bracket plate surface of the lower bracket 2, and the pivot 3 is inserted between the opposed plate surfaces to be pivotally connected to the lower bracket 2. In this bracket device, as will be described later, a stopper pin protrudes from the plate surface of the lower bracket 2 toward the upper bracket 1 or is immersible. From this basic reclining device configuration, the seat back B is supported by the seat cushion C so as to be tiltable before and after a predetermined standing position, and the predetermined standing position and the front and rear tilt positions are operated by operating the stopper pin. It is equipped with a lock fixing.
[0013]
As shown in FIGS. 2 and 3, the pivot 3 is inserted into the plate surface of the lower bracket 2 and the support shaft portion 3a is inserted through the plate surface of the upper bracket 1 and has a smaller diameter than the support shaft portion 3a. The shaft portion 3b, a retaining rod portion 3c provided at the shaft end on the lower bracket 2 side, and a support shaft portion 3d having a minimum diameter protruding from the plate surface of the upper bracket 1 are formed. The pivot 3 is inserted into the plate surface side of the upper bracket 1 from the plate surface side of the lower bracket 2, and is crushed and formed as a clinch portion 3 e with the protruding end side of the support shaft portion 3 d protruding from the plate surface of the upper bracket 1. The brackets 1 and 2 are provided with shaft stoppers from the stopper hook part 3c and the clinch part 3e.
[0014]
A bearing portion 4a is fitted and inserted into the pivot 3 on the axis of the support shaft portion 3d, and the washer 4 is supported before the shaft end of the support shaft portion 3d protruding from the bearing portion 4a is crushed as the clinch portion 3e described above. It is provided on the axis of the part 3d. The washer 4 is formed in a circular dish shape with an overhanging outer peripheral flange portion 4b that expands in a direction away from the plate surface of the upper bracket 1 from the bearing portion 4a. The washer 4 is attached to the plate surface of the upper bracket 1 with the bearing portion 4a as a seat portion, and the shaft end of the support shaft portion 3d protruding from the bearing portion 4a to the inside of the flange portion 4b is crushed and fixed to the upper bracket. Has been. Also, the axis of the pivot 3 is fixed directly to the plate surface of the upper bracket 1 by the clinching portion 3e, and is attached and fixed integrally with the upper bracket 1.
[0015]
A disc-shaped shielding cover 5 is fitted and fixed to the washer 4 so as to enclose the clinch portion 3e of the pivot 3 inside. The shielding cover 5 has a flat outer surface of the cover body 5a opposed to the side portion of the seat back B, and a plurality of latching claws 5b protruding on the inner surface side of the cover body 5a are provided on the overhanging flange portion 4b of the washer 4. By being engaged, it is fitted and fixed to the washer 4. Further, as shown in FIG. 4, the shielding cover 5 has a protruding piece 5c formed upright from the peripheral flange portion 5d, and the protruding piece 5c is fitted into a retaining hole 1a provided on the plate surface of the upper bracket 1 as shown in FIG. Therefore, the upper bracket 1 is fixed to the upper bracket 1.
[0016]
In addition to the components, the wave washer 6 is assembled by interposing between the opposing plate surfaces of the upper bracket 1 and the lower bracket 2 on the axis of the pivot 1. The corrugated washer 6 keeps a sliding contact distance between the plate surfaces of the upper bracket 1 and the lower bracket 2, and smoothly supports the upper bracket 1 and the pivot portion 3a of the pivot shaft 3 inserted through the plate surface of the lower bracket 2 together with the pivot shaft 3. It is installed so that it can slide and rotate.
[0017]
In the seat bracket device configured as described above, the pivot 3 is inserted into the plate surface of the upper bracket 1 located on the seat back B side from the plate surface of the lower bracket 2, and the protruding end side is crushed and molded, whereby the axis line is obtained. The retaining hook portion 3c and the clinch portion 3e are fixed directly to the upper bracket 1. The pivot 3 is rotatably supported by the lower bracket 2 at a support shaft 3a. For this reason, when the seat back B is tilted or returned with the pivot 3 as a fulcrum, the pivot 3 rotates integrally with the upper bracket 1 so that the clinch portion 3e does not slide on the side portion of the seat back B. .
[0018]
In particular, the clinching portion 3e is enclosed and accommodated in the washer 4 by the shielding cover 5 facing the side portion of the seat back B with the flat outer surface of the cover body 5a. It is possible to reliably prevent contact with the side portion of the. Further, since the shielding cover 5 is provided integrally with the upper bracket 1 together with the washer 4 which is fastened and fixed to the clinch portion 3e of the pivot 3, the seatback B may be subjected to frictional force due to the rotation of the shielding cover 5. Absent.
[0019]
The seat bracket device is assembled such that the seat back B can be locked to the seat cushion C at a predetermined standing position or at a front and rear tilt position. This locking means is configured by including a stopper pin 7 that protrudes from the plate surface of the lower bracket 2 toward the upper bracket 1 and has a stopper pin 7 that can be pulled by a knob operation in the direction away from the upper bracket 1. ing.
[0020]
Corresponding to the stopper pin 7, the upper bracket 1 is provided with a plurality of pin receiving grooves 1b on the outer peripheral edge of the lower side plate surface on a concentric circle with the pivot 3 as the center. At least three pin receiving grooves 1b are provided in accordance with the seat back B standing position and the front and rear tilt positions. Each pin receiving groove 1b is formed in a semicircular shape having the same diameter with which the tip shaft portion 7a of the stopper pin 7 is fitted. The stopper pin 7 is provided with a front end shaft portion 7a and a rear end shaft portion 7b formed with a diameter smaller than that of the middle abdominal shaft portion 7c inserted through the plate surface of the lower bracket 2.
[0021]
The stopper pin 7 is attached to the plate surface of the lower bracket 2 by a bottomed cylindrical pin holder 8. In this pin holder 8, the coil spring 9 is inserted into the rear end shaft portion 7 b of the stopper pin 7 as an extension spring, and the coil spring 9 including the coil spring 9 is accommodated in the cylinder from the open end side 8 a of the pin holder 8. The pin 7 is supported so as to be able to be biased. The stopper pin 7 projects the rear end shaft portion 7b outward from the bottom opening 8b of the pin holder 8, and the front end shaft portion 7a projects outward from the open end side 8a of the pin holder 8 so that the upper bracket 1 so as to be freely engageable with any one of the pin receiving grooves 1b.
[0022]
The pin holder 8 is formed on the plate surface of the lower bracket 2 by pressing and fitting the open end side 8a to the plate surface of the lower bracket 2 at the stepped portion of the outer peripheral surface, thereby crushing and forming the protruding end side as the clinch portion 8c. Can be fixed directly. At the same time, the stopper pin 7 protrudes by the coil spring 9 so that the stepped surface of the middle shaft portion 7c contacts the hole edge of the pin receiving groove 1b, and the tip shaft portion 7a engages with any pin receiving groove 1b. The front end shaft portion 7a can be detached from the pin receiving groove 1b by pulling from the rear end shaft portion 7b against the coil spring 9.
[0023]
The stopper pin 7 can be equipped with a pulling knob 10 on the rear end shaft portion 7 b protruding from the pin holder 9. Further, as described above, the stopper pin 7 engages the tip shaft portion 7a with the semicircular pin receiving groove 1b, and the pin receiving piece 11 is shown in FIGS. As shown, it is provided on the plate surface of the lower bracket 2 so as to be positioned relative to the outer peripheral edge of the lower plate surface of the upper bracket 1. This pin piece 11 can be equipped to serve also as a stopper for stably positioning the seat back by receiving and supporting the upper bracket 1 at the tilted position before and after the seat back.
[0024]
【The invention's effect】
As described above, according to the seat reclining device of the first aspect of the present invention, the axis of the pivot connecting the upper bracket to the lower bracket is fixed directly and fixed to the upper bracket side by the clinch portion, and Since the bearings are rotated so as to rotate relative to each other on the lower bracket side, the pivotal shaft does not slide and rotate on the seat back side as the seat back tilts or returns, so that the side portion of the seat back is not damaged.
[0025]
According to the seat reclining device according to claim 2 of the present invention, since the clinch portion of the pivot is enclosed and accommodated in the washer by the shielding cover, the clinch portion can be prevented from coming into contact with the side portion of the seat back, Further, since the shielding cover is fitted and fixed to the washer with the flat outer surface facing the seat back side, it is possible to more reliably prevent the side portion of the seat back from being damaged.
[0026]
According to the seat reclining device of the third aspect of the present invention, since the corrugated washer is interposed between the opposed plate surfaces of the upper bracket and the lower bracket, the upper bracket can be smoothly rotated together with the pivot so that the seat can be rotated. The bag can be easily tilted or returned.
[0027]
According to the seat reclining device of the fourth aspect of the present invention, the washer is also fastened integrally with the upper bracket by the clinch portion of the pivot so that the washer does not rotate on the seat back side like the clinch portion of the pivot. It can be easily installed and fixed.
[0028]
According to the seat reclining device of the fifth aspect of the present invention, together with the washer, the shielding cover can be securely attached and fixed to the upper bracket so as not to rotate on the seat back side.
[Brief description of the drawings]
FIG. 1 is a front view showing a seat reclining device according to the present invention from the front side of a seat.
FIG. 2 is a partially enlarged front view showing the seat reclining device.
FIG. 3 is an enlarged side view showing a pivot of the seat reclining device.
FIG. 4 is a partially enlarged sectional view showing a shielding cover of the seat reclining device.
FIG. 5 is a side view showing the seat reclining device from the facing side of the seat back and the seat cushion.
[Explanation of symbols]
B Seat back C Seat cushion 1 Upper bracket 1a Upper bracket retaining hole 2 Lower bracket 3 Pivot 3c Pivot stop 3e Pivot clinch 4 Washer 4a Washer bearing 4b Washer outer flange 5 Shield cover 5a Shield cover Cover body 5d Shield cover protrusion

Claims (5)

It has an upper bracket that is attached to the side of the seat back and a lower bracket that is attached to the side of the seat cushion. The upper bracket is located on the inner side and the lower bracket is located on the outer side with respect to the side of the seat back. In the seat reclining device for supporting the seat back in a tiltable manner with a seat cushion, with the pivots inserted through the opposing plate surfaces of the brackets positioned relative to each other and with the pivot as a fulcrum,
The pivot shaft is rotatably supported on the lower bracket side, and the axis line is set upward by a clasp portion provided on the shaft end on the lower bracket side and a clinch portion obtained by crushing and deforming the shaft end side protruding from the plate surface of the upper bracket. A reclining device for a seat, wherein the reclining device is fixed directly to the bracket side. A washer having a bearing portion fitted and arranged on the axis of the pivot projecting from the plate surface of the upper bracket, and an outer peripheral flange portion projecting in a direction away from the plate surface of the upper bracket from the bearing portion; A shielding cover fitted and fixed to the outer peripheral flange portion of the washer with the outer surface facing the seat back side,
2. The reclining device for a seat according to claim 1, wherein the pivot is provided with a clinching portion sealed in a washer with a shielding cover. 3. The seat for a seat according to claim 1, wherein the upper bracket is supported by a corrugated washer interposed on a pivot axis between the plate surfaces facing the lower bracket so as to be slidably rotatable with the lower bracket. Reclining device. 3. The seat reclining device according to claim 2, wherein the washer is fastened and fixed integrally with the upper bracket by a clinch portion of a pivot. 3. The seat reclining device according to claim 2, wherein the shielding cover is fixed by being hooked and fixed to the upper bracket by fitting a protruding piece standing from the cover main body into a retaining hole of the upper bracket.

Images