JPH0538306A - Seat reclining device - Google Patents

Abstract

PURPOSE:To prevent a seat reclining device from falling into an incomplete lock condition by enabling an tooth to be displaced relative to an upper arm during locking seat reclining devices so that a phase shift is corrected during locking the seat reclining devices. CONSTITUTION:An arm 90 is arranged overlapping with an upper tooth 20, having an insertion hole 90a formed in the lower part thereof, which is fitted onto a first pivot shaft 21, and attaching holes 90c, 90d formed therein in the vicinity of the insertion hole 90a. The attaching holes 90c, 90d are fitted therein with flanged attaching pins 23 for attaching the upper tooth 20 to the arm 90. The attaching pins 23 are inserted in through holes 20c, 20d with a predetermined gap (b). With this arrangement in which the predetermined gap (b) is given, even if a phase shift occurs between the outer side seat reclining device and the inner side seat reclining device so that either one of them falls into an incomplete lock condition during locking, the upper tooth 20 is turned by a degree corresponding to one-half of the tooth, relative to the arm 90, thereby it is possible to eliminate the incomplete lock condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat reclining device, and more particularly to a double-sided lock type seat reclining device provided with a latch type seat reclining device on each of the left and right sides of the seat.

[0002]

2. Description of the Related Art This type of seat reclining device is
It has outer side and inner side base plates that are fixed to the left and right sides of the seat cushion, and arms that are fixed to the left and right sides of the seat back and that are axially attached to the base plates, respectively. It has a lock mechanism consisting of a tooth, a lower tooth that can be engaged and disengaged with each of the upper parts, and a cam member that operates the lower tooth, and the cam is operated by operating an operation lever that is axially attached to the outer side base plate. It is designed to activate the member.

By operating the operating lever, the lock mechanism of the inner seat reclining device is driven in synchronism with the lock mechanism of the outer seat reclining device to lock or unlock each lower tooth with respect to each upper part. Is configured to be.

[0004]

However, due to the distortion of the seat frame, the distortion of the floor of the vehicle body, and the like, a phase shift occurs at the time of locking between the outer reclining device and the inner reclining device of the inner side. Even if the outer side is locked, the inner side may be incompletely locked, that is, half-locked. In order to prevent damage to upper parts, lower teeth, etc. due to this half lock, the conventional seat reclining device increases the strength by increasing the plate thickness of the upper parts, lower teeth, etc., which increases the weight. At the same time, there is a problem that the cost becomes high.

The present invention has been made to solve the above-mentioned problems of the prior art, and its object is to correct the phase shift when the seat reclining devices provided on the left and right sides of the seat are locked. It is to provide a seat reclining device capable of

[0006]

In order to achieve the above object, according to the present invention, a lower tooth which can be engaged with and disengaged from an upper part attached to an arm is provided on each base plate mounted on both left and right sides of a seat. The seat reclining device is characterized in that the upper part with respect to at least one of the arms can be displaced.

[0007]

Since the present invention is configured as described above, the upper part can be displaced with respect to the arm when each seat reclining device is locked. This makes it possible to correct the phase shift when each seat reclining device is locked and eliminate the half lock.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

1 to 12 relate to a first embodiment of the present invention, FIG. 1 is a schematic perspective view of a seat reclining device, FIG. 2 is a front view of an outer seat reclining device, and FIG. 3 is FIG. III-III arrow side view of FIG. 4, FIG. 4 is an IV-IV arrow view of FIG. 3, FIG. 5 is an explanatory view showing the relationship between the arm and upper parts, and FIG. 6 is a VI-VI arrow of FIG. Sectional explanatory view, FIG. 7 is a plan explanatory view of the reinforcing plate, FIG. 8 is an explanatory view showing a state in which upper parts, lower teeth and cam members are attached to the reinforcing plate, FIG. 9 is a front explanatory view of the inner seat reclining device, FIG. 10 is a side view of the X-X arrow of FIG. 9, FIG. 11 is an operation explanatory view of the outer seat reclining device, and FIG. 12 is an operation explanatory view of the inner seat reclining device.

In the figure, S is a seat reclining device, which is a base plate in which a lower tooth 30 that can be engaged with and disengaged from an upper part 20 attached to an arm 90 is mounted on both left and right sides of a seat, for example, outer and inner sides. It is provided in 10A and 10B.

The present invention is particularly applicable to at least one armature 90 for at least one arm 90.
The feature is that 0 can be displaced.

Next, the structure of the present invention will be described in more detail.

First, the seat reclining device S1 on the outer side will be described with reference to FIGS. 2 to 8 and 11. FIG.

The outer side base plate 10A is fixed to an outer side portion of a seat cushion (not shown), and a reinforcing plate 80 is superposed on the central portion of the outer surface of the base plate 10A. A first pivot 21 is planted in the base plate 10A and the reinforcing plate 80, and an upper part 20 having an arcuate tooth portion 20a formed at the lower edge is pivotally attached to the pivot 21. An arm 90 fixed to an outer side portion of a seat back (not shown) is superposed and arranged on the upper part 20, and an insertion hole 90a formed in a lower portion of the arm 90 is provided in the upper shaft 20.
It is inserted in 1. The arm 90 has an insertion hole 90a.
Flange portion 9 formed by burring near the
Mounting holes 90c and 90d are formed on both sides with 0b in between. The flange portion 90b is inserted into a through hole 20b formed in the upper part 20 with a predetermined clearance a, and a damper 22 made of a rubber-like elastic body is interposed in the clearance a. Further, a flanged mounting pin 23 for mounting the upper part 20 to the arm 90 is fixed to the mounting holes 90c and 90d, and the mounting pin 23 has a predetermined clearance in the through holes 20c and 20d formed in the upper part 20. It is inserted with b. by this,
The upper part 20 is set so as to rotate about 1/2 tooth with respect to the arm 90, and the damper 2
2 allows the upper part 20 to be held in the neutral position.

A lower tooth 30 having a tooth portion 30a that meshes with the tooth portion 20a of the upper part 20 is pivotally attached to a second pivot 31 planted in the base plate 10A and the reinforcing plate 80. Further, the lower tooth 30 has a tooth portion 30.
Projections 30c and 30d are formed on both sides of the recess 30b with a recess 30b sandwiched between the base plate 10A and the reinforcing plate. Third pivot 51 planted in 80
Is pivoted on. The cam member 50 is biased in the direction of arrow A in FIGS. 2 and 11 by a tension spring 52, and a connecting pin 53 is planted on its free end side. An outer side actuating lever 60A is rotatably mounted on the third pivot 51, and has an arcuate shape centered on the axial center of the third pivot 51 formed on one free end side of the actuating lever 60A. The connecting pin 53 implanted in the cam member 50 is inserted into the long hole 60a. The actuating lever 60A is a tension spring 4 described later.
2 is urged in the direction of arrow A in FIGS. 2 and 11, and a connecting pin 61A is planted on one free end side thereof.

First, second and third pivots 21, 31, 5
1, an outer holder plate 100A is fixed so as to sandwich an upper part 20, a lower tooth 30, and an operating lever 60A, and a connecting pin 61 of the operating lever 60A is fixed to the holder plate 100A.
An arcuate elongated hole 100a is formed around the axis of the third pivot 51 into which A is inserted. Further, the spiral spring 9 is attached to the first pivot shaft 21 protruding from the holder plate 100A.
1 is wound, one end of the spiral spring 91 is attached to the first pivot 21, and the other end is attached to the arm 90.
2, and the arm 90 is biased in the direction of arrow C in FIG. 2 by the spiral spring 91.

The first, second and third pivots 21, 3
1, 51 are provided with stepped portions, which are inserted into holes formed so as to face the reinforcing plate 80 and the base plate 10A, and then fixed by caulking the portions protruding from the base plate 10A. Further, as shown in FIG. 4, cut portions 21a are formed in the portions of the first pivot shaft 21 to be inserted into the reinforcing plate 80 and the base plate 10A so as to face each other. Also, it is set so as to be firmly fixed to the base plate 10A.

The operating lever 40 for actuating the cam member 50 via the actuating lever 60A is pivotally mounted on the second pivot 31, and the connecting link 41 is connected to the upper extending portion 40a as shown in FIG. Is connected and pivotally supported by the pin 42, and the other end of the connecting link 41 is pivotally connected by the connecting pin 61A of the operating lever 60A. The operating lever 40 is biased by a tension spring 43 so as to rotate in the direction of arrow D in FIG.
It is regulated by bringing the lateral extension 40b into contact with the stopper 100b formed by cutting and raising 00A.

Seat reclining device S on the outer side
The wire 70 for connecting the seat reclining device S2 on the inner side to the outer case 70b
One end of the inner wire 70a that is inserted into the holder is locked to the bent portion 60b formed on the other free end side of the actuating lever 60A, and one end of the outer case 70b is fixed to the guide portion 100c formed on the holder plate 100A. Then, it is inserted into the guide hole 10a formed in the base plate 10A by burring.

Next, the inner seat reclining device S2 will be described with reference to FIGS. 9, 10 and 12. In the figure, parts that are the same as or equivalent to those on the outer side are given the same reference numerals, and descriptions thereof will be omitted.

However, in this embodiment, the through holes 20c and 20d of the inner side upper part 20 and the two mounting pins 23 are provided.
The clearance b between and is set to O.

The connecting pin 61B, which is planted on one free end side of the inner-side actuating lever 60B pivotally mounted on the third pivot 51, has the center of the third pivot 51 on the inner-side holder plate 100B. Is inserted in the arc-shaped elongated hole 100d formed with the center as the center. Also the operating lever 60B
Is urged in the direction of arrow E in FIG. 9 by a tension spring 62 having both ends locked to the other free end side and the holder plate 100B, whereby the connecting pin 61B is always attached to the end of the long hole 100d. Are in contact.

On the inner side base plate 10B,
A guide hole 10b is formed by burring at a position facing the guide hole 10a of the outer side base plate 10A.
Is formed, and the wire 70 has guide holes 10a, 1
The other end of the outer case 70b is fixed to the guide portion 100e formed on the holder plate 100B through 0b, and the other end of the inner wire 70a is locked to the connecting pin 61B.

The outer side and inner side upper parts 20, 20, the lower teeth 30, 30, and the cam members 50, 50 constitute a locking mechanism.

Next, the operation of the first embodiment of the present invention will be described.

11 and 12 show a state in which the locking mechanisms of the outer and inner seat reclining devices S1 and S2 are locked. The cam member 50 is a tension spring on the convex portion 30c of the lower tooth 30. It is pressed by the spring force of 52, so that the lower tooth 3
The tooth portion 30 a of 0 meshes with the tooth portion 20 a of the upper part 20. The connecting pins 61A and 61B of the operating levers 60A and 60B are holder plates 100A and 100B.
Tension springs 43, 6 at one end of the long holes 100a, 100d of
It is pressed by the spring force of 2.

To release the lock from this locked state so as to tilt the seat back, the operation lever 40 is moved to the position shown in FIG.
The center second pivot 31 is rotated in the direction of arrow F. Then, the cam member 50 rotates counterclockwise through the connecting link 41 and the actuating lever 60A against the spring force of the tension spring 52 about the third pivot shaft 51 in FIG. 11 to rotate in the recess 30b of the lower tooth 30. Reach the position opposite. Further, the cam member 50 rotates in the same direction to rotate the convex portion 30d.
The lower tooth 30 rotates clockwise about the second pivot 31 in FIG. As a result, the tooth portion 20a of the upper part 20 and the tooth portion 30a of the lower tooth 30 are disengaged, and the arm 90 moves to the first pivot 2
It rotates clockwise about 1 by the spring force of the spiral spring 91 in FIG.

At this time, the operating lever 60A interlocking with the operating lever 40 via the connecting link 41 rotates counterclockwise about the third pivot 51 in FIG. 11, so it is connected to the operating lever 60A. Inner wire 70a
12, the inner side operating lever 60B is rotated clockwise in FIG. 12, whereby the cam member 50 is rotated clockwise against the spring force of the tension spring 62, as in the outer side. The tooth portion 20a of the upper part 20 and the tooth portion 30a of the lower tooth 30 are disengaged, and the lock is released.

In this way, by operating the operation lever 40, the outer and inner seat reclining devices S are
After unlocking S1 and S2, when the seated person tilts the seat back to a desired position and releases the operation lever 90, the operation lever 40 is moved by the spring force of the tension springs 43 and 52.
Return to position 1. At this time, the cam member 50 rotates clockwise in FIG. 11 via the connecting link 41 and the actuating lever 60A to push up the convex portion 30c of the lower tooth 30 and rotate the lower tooth 30 counterclockwise. The parts 20a and 30a are meshed with each other, whereby the seat reclining device S1 on the outer side is locked.

On the other hand, in the actuating lever 60B of the inner seat reclining device S2, the outer actuating lever 60A rotates clockwise in FIG. 11 to open the inner wire 70a. 62
The spring force causes the cam member 50 to rotate counterclockwise in the same manner as the outer side, so that the seat reclining device S2 on the inner side is locked.

Here, due to the distortion of the seat frame, the distortion of the floor of the vehicle body, or the like, a phase shift may occur between the outer side and the inner side at the time of locking, and either one may be in a half-locked state. In such a case, in this embodiment, the through hole 2 of the outer side upper part 20 is used.
Since a gap b is set between 0c and 20d and the two mounting pins 23, and the upper part 20 rotates about 1/2 tooth with respect to the arm 10, the half-locked state is canceled, Can be fully locked.

Further, in the above-described first embodiment, the clearance b is provided between the through holes 20c and 20d of the outer side upper part 20 and the two mounting pins 23, but the same clearance is provided only on the inner side. b may be provided, the outer side,
When the gap b is provided on both inner sides, it is about 1 / each.
It can be applied by rotating by 4 teeth.

In the above-described first embodiment, the flange portion 90b is formed on the arm 90, and the flange portion 90b is formed through the through hole 20b formed in the upper part 20.
The damper 22 made of a rubber-like elastic body is interposed in the gap a, and the damper 22 can hold the upper part 20 in the neutral position. 22 may use a damper as shown in FIGS. 13 to 23.

13 to 15 relate to the second embodiment of the present invention, FIG. 13 is an explanatory view showing the relationship between an arm provided with a damper and an upper part, and FIG. 14 is an XIV-XI of FIG.
FIG. 15 is a sectional view taken along the arrow V, and FIG. 15 is a sectional view corresponding to FIG. 14 showing a state before the damper mounting pin is crimped.

In the second embodiment, the flange portion 25 replaces the flange portion 90b of the arm 90 shown in the first embodiment.
The damper mounting pin 25 including a, a large diameter portion 25b and a small diameter portion 25c is used. The small diameter portion 25c is the arm 9
The large diameter portion 25b is fitted into the through hole 90e formed in 0.
Is inserted into the through hole 20e formed concentrically with the through hole 90e in the upper part 20 with a predetermined clearance d, and the damper 2 made of a rubber-like elastic body having a high hardness is inserted into the clearance d.
2A is interposed. The outer peripheral surface and the inner peripheral surface of the damper 22A are set so as to be respectively inserted into the through hole 20e of the upper part 20 and the large diameter portion 25b of the damper mounting pin 25, and the height of the damper 22A is set to the upper side. The plate thickness of the tooth 20 is larger by e, and the length of the large diameter portion 25b of the damper mounting pin 25 is set to be the same as the plate thickness of the upper part 20.

When the damper mounting pin 25 is caulked as shown in FIG. 15 and the small diameter portion 25c of the damper mounting pin 25 is caulked as shown in FIG.
2A is compressed by the collar portion 25a of the damper mounting pin 25. As a result, elastic force is applied to the damper 22A, and the upper part 20 can be held in the neutral position without play.

As described above, according to the second embodiment described above, the damper 22A is inserted into the through hole 20 of the upper part 20.
e and the large diameter portion 25b of the damper mounting pin 25, it can be easily inserted because no compressive force acts on the damper 22A. Therefore, the mounting workability of the damper 22A can be significantly improved.

16 to 20 relate to a third embodiment of the present invention, FIG. 16 is a plan view of a damper, and FIG. 17 is FIG.
6 is a sectional view taken along the line XVII-XVII of FIG. 18, FIG. 18 is an explanatory view showing the relationship between the arm provided with the damper and the upper part, FIG. 19 is a sectional view taken along the line XIX-XIX of FIG. 18, and FIG. FIG. 20 is a cross-sectional explanatory view corresponding to FIG. 19 showing a state before pin crimping.

In the third embodiment, instead of the damper 22A made of the rubber-like elastic body shown in the second embodiment,
A damper 22B made of a leaf spring is used. The damper 22B is formed in a cylindrical shape, and a plurality of slits 22a, for example, six slits 22a are formed on the upper outer peripheral surface of the slit 22a at the same intervals and open upward. Six notch portions 22b facing the middle portion are formed so as to open downward. The lower outer peripheral surface of the damper 22B including the cutouts 22b is curved outward to form an arcuate bent portion 22c.

The inner peripheral surface of the damper 22B is set so as to be fitted into the large diameter portion 25b of the damper mounting pin 25, and the bent portion 22c of the damper 22B is fitted into the through hole 20e of the upper part 20. 22B
The height of is set to be larger than the plate thickness of the upper part 20 by h.

Then, when the small diameter portion 25c of the damper mounting pin 25 is caulked as shown in FIG. 19 from the state before caulking the damper mounting pin 25 as shown in FIG.
B is compressed by the collar portion 25a of the damper mounting pin 25, and the effect of the third embodiment is the same as that of the second embodiment described above, and the description thereof is omitted.

21 to 23 relate to a fourth embodiment of the present invention, FIG. 21 is a perspective view of a damper, FIG. 22 is an explanatory view showing a relationship between an arm provided with a damper and an upper part, and FIG. FIG. 23 is a cross-sectional view taken along the line XXIII-XXIII of FIG. 22.

In the fourth embodiment, a damper 22C made of a leaf spring is used as in the third embodiment. The damper 22C includes a base portion 22d formed in a U shape and a pair of curved portions 22e formed in an inverted U shape from both ends of the base portion 22d. The base portion 22d has a large diameter portion 25b of the damper mounting pin 25. The curved portion 22e is elastically pressed into the through hole 20e of the upper part 20, and the height of the damper 22C is set to be equal to or slightly smaller than the plate thickness of the upper part 20.

By caulking the small diameter portion 25c of the damper mounting pin 25 as shown in FIG. 23, the upper part 20 can be held in the neutral position without play by the elastic force of the damper 22C.

As described above, according to the above-described fourth embodiment, the large diameter portion 25b of the damper mounting pin 25 is attached to the base portion 22d.
The damper 22C can be attached to the upper part 20 by simply inserting the curved portion 22e of the damper 22C into which the through hole 20e of the upper part 20 is pressed and inserted. Therefore, the mounting workability of the damper 22C can be significantly improved.

[0046]

As described above, according to the present invention, since the upper part can be displaced with respect to the arm, the phase shift when each seat reclining device is locked can be corrected, and the half lock can be eliminated. it can. As a result, even if the strength of the upper part lower or the lower tooth is lowered, it is not damaged. Therefore, the plate thickness of the upper part lower and the lower tooth can be reduced, the cost can be reduced, and the weight can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective explanatory view of a seat reclining device according to a first embodiment of the present invention.

FIG. 2 is also a front explanatory view of the seat reclining device on the outer side.

FIG. 3 is a side view of a III-III arrow in FIG.

FIG. 4 is a side view of an arrow IV-IV in FIG.

FIG. 5 is an explanatory view showing the relationship between the arm and the upper part according to the first embodiment of the present invention.

6 is a cross sectional view taken along the line VI-VI of FIG.

FIG. 7 is an explanatory plan view of the reinforcing plate according to the first embodiment of the present invention.

FIG. 8 is an explanatory view showing a state where the upper plate, the lower tooth, and the cam member are also attached to the reinforcing plate.

FIG. 9 is a front explanatory view of the inner seat reclining device according to the first embodiment of the present invention.

10 is an explanatory side view taken along the line XX of FIG.

FIG. 11 is an operation explanatory view of the outer seat reclining device according to the first embodiment of the present invention.

FIG. 12 is an explanatory view of the operation of the inner seat reclining device.

FIG. 13 is an explanatory view showing the relationship between the arm provided with the damper and the upper part according to the second embodiment of the present invention.

14 is a cross-sectional view taken along the line XIV-XIV of FIG.

FIG. 15 is a view showing a state before caulking the damper mounting pin.
It is a cross-sectional explanatory view corresponding to FIG.

FIG. 16 is a plan view of a damper according to the third embodiment of the present invention.

FIG. 17 is a cross sectional view taken along line XVII-XVII in FIG.

FIG. 18 is an explanatory diagram showing a relationship between an arm provided with a damper and an upper part according to a third embodiment of the present invention.

FIG. 19 is a sectional view taken along the line XIX-XIX in FIG.

FIG. 20 is a view showing a state before caulking the damper mounting pin.
It is a cross-sectional explanatory view corresponding to 9.

FIG. 21 is a perspective explanatory view of a damper according to a fourth embodiment of the present invention.

FIG. 22 is an explanatory diagram showing the relationship between the arm provided with the damper and the upper part.

23 is a cross-sectional view taken along the line XXIII-XXIII of FIG.

[Explanation of symbols]

 S Seat reclining device S1 Outer side seat reclining device S2 Inner side seat reclining device 10A Outer side base plate 10B Inner side base plate 10a, 10b Guide hole 20 Upper part 20a Teeth 20b Through hole 20c Through hole 20d Through hole 20e Through hole 21 First pivot 22 Damper 22A Damper 22B Damper 22C Damper 23C Mounting pin 25 Damper mounting pin 25a Collar part 25b Large diameter part 25c Small diameter part 30 Lower tooth 30a Tooth part 30b Recessed part 30c Convex part 30 Operation lever lever 40A Outer side base plate 40B Inner side base plate 40a Guide hole 40b Guide hole 41 Connection link 50 Reinforcing plate 50 Cam member 51 Third pivot Shaft 53 Connecting pin 60A Outer side operating lever 60B Inner side operating lever 60a Long hole 61A Connecting pin 61B Connecting pin 70 Wire 70a Inner wire 80 Reinforcing plate 90 Arm 90b Flange portion 90c Mounting hole 90d Mounting hole 90e Through hole 91 Swirl spring 100A Outer side holder plate 100B Inner side holder plate 100a long hole 100d long hole

Claims (1)

[Claims] 1. A seat reclining device in which lower teeth which can be engaged with and disengaged from an upper part attached to an arm are provided on respective base plates mounted on both left and right sides of a seat, wherein at least one of the arms is reclined. A seat reclining device characterized in that the upper part can be displaced.