JP2003325260A - Both-side reclining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a both-side reclining device without trouble in lock performance. <P>SOLUTION: The device includes: a hinge pin 120 fixed to the cam 170 of an outer side reclining mechanism 90; a cylindrical body 301' which is arranged at the rotary center of the cam 170' in an inner side reclining mechanism 90', and provided with two parallel sides in a cross-sectional shape and an open distal end surface; a connection pipe 311 whose one end part is fixed by the hinge pin 120 and whose other end part is fitted with play to the cam 170' of the inner side reclining mechanism 90'; and a centering member 317 which is fixed to the other end part of the connection pipe 311, provided with two projections 315 to be abutted to the two parallel sides of the outer cylinder of the cylindrical body 301' in the cam 170', and constituted of an elastic material. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a first reclining mechanism and a second reclining mechanism for locking / unlocking the tilting of a seat back by rotating a cam provided inside thereof, respectively. The present invention relates to a double-sided reclining device that locks / unlocks one of the first reclining mechanism and the second reclining mechanism to lock / unlock the other reclining mechanism.

[0002]

2. Description of the Related Art As shown in FIG. 16, by rotating a cam provided inside, a seat back 3 of a seat 1 is rotated.
There is a reclining mechanism provided on both sides (outer side, inner side) of the seat 1 for locking / unlocking the tilt of the seat cushion 5.

In the figure, an operating lever 11 is attached to a hinge pin 9 which is press-fitted into a cam of the outer reclining mechanism 7.
The operating force acting on the operation lever 11 is provided by the outer reclining mechanism 7 provided with the operation lever 11.
, One end of which is welded to the hinge pin 9 of the outer reclining mechanism 7 and the other end of which is welded to the hinge pin 14 of the inner reclining mechanism 13 via the connecting pipe 15 and the inner reclining mechanism 13 The hinge pin 14, and the hinge pin is transmitted to the press-fitted cam.

[0004]

However, when the double-sided reclining device having the above-described structure is assembled, after fixing the outer reclining mechanism 7 and the inner reclining mechanism 13 to the jig, both reclining mechanisms are locked. The connection pipe 15 is welded to the hinge pin 9 of the outer reclining mechanism 7 and the hinge pin 14 of the inner reclining mechanism 13.

Therefore, in this state, the cam and hinge pin 9 of the outer reclining mechanism 7, the connecting pipe 15, the cam and hinge pin 14 of the inner reclining mechanism 13 are integrated, and the outer reclining mechanism 7 is formed.
Between the inner reclining mechanism 13 and the inner reclining mechanism 13, the mechanism for transmitting the locking / unlocking movement of the outer reclining mechanism 7 to the inner reclining mechanism 13 has no play (clearance).

When the assembly in such a state is attached to the vehicle, the twist of one of the reclining mechanisms is caused to pass through the connecting pipe 15 due to the dimensional error of the outer reclining mechanism 7, the inner reclining mechanism 13 and the floor of the vehicle. Is transmitted to the reclining mechanism, and there is a problem that the lock performance is hindered.

The present invention has been made in view of the above problems, and an object thereof is to provide a double-sided reclining device that does not affect the lock performance.

[0008]

The invention according to claim 1 for solving the above-mentioned problems is a first reclining mechanism for locking / unlocking tilting of a seat back by rotating a cam provided therein. A two-sided reclining device in which second reclining mechanisms are provided on both sides of the seat, and when one of the first reclining mechanism and the second reclining mechanism is locked / unlocked, the other reclining mechanism is also locked / unlocked. The cams of the first reclining mechanism and the second reclining mechanism are arranged such that the rotation center axes of the cams are on the same straight line, the base end portion is fixed to the rotation center of the cam of the first reclining mechanism, and the tip end side is Along the center axis of rotation of the cam, it is directed toward the second reclining mechanism. The hinge pin extending in the direction of the second reclining mechanism is fixed to the rotation center of the cam of the second reclining mechanism, and the tip end side extends in the direction of the first reclining mechanism along the rotation center axis of the cam. A cylindrical body having two parallel sides and an open end surface
The reclining mechanism is arranged on the rotation center axis of the cam of the second reclining mechanism, one end of which is fixed to the hinge pin of the first reclining mechanism, and the other end of the reclining mechanism has a play with the inner cylinder of the cylindrical body. A connection pipe that is fitted and has a free fitting portion having two parallel sides that are opposed to the two parallel sides of the inner cylinder of the cylindrical body and that rotates integrally with the cam of the second reclining mechanism. And a centering member made of an elastic material that is fixed to the other end of the connecting pipe and has two projecting portions that come into contact with two parallel sides of the outer cylinder of the cylindrical body. It is a reclining device on both sides.

The connecting pipe and the cylinder fixed to the cam of the second reclining mechanism are loosely fitted (fitted with clearance). That is, since there is a clearance between the first reclining mechanism and the second reclining mechanism, the mechanism for transmitting the locking / unlocking motion of one reclining mechanism to the other reclining mechanism has a clearance, so that the first reclining mechanism and the second reclining mechanism are provided. After integrating
When attached to the vehicle, even if there is a dimensional error in the first reclining mechanism, the second reclining mechanism, and the floor of the vehicle, the twist of one reclining mechanism is not transmitted to the other reclining mechanism via the connecting pipe,
It does not affect the lock performance.

Further, although the connecting pipe and the cylinder fixed to the cam of the second reclining mechanism are loosely fitted (fitting with clearance), they are fixed to the other end side of the connecting pipe, By providing a centering member made of an elastic material having two protruding portions that come into contact with two parallel sides of the outer cylinder of the cylindrical body, the connecting pipe is located at approximately the center of the clearance, and the first reclining mechanism and the second reclining mechanism are provided. It is less likely that the lock / unlock timing of the reclining mechanism will shift.

According to the second aspect of the present invention, a first reclining mechanism and a second reclining mechanism for locking / unlocking the tilting of the seat back by rotating a cam provided inside are respectively provided on both sides of the seat. In the double-sided reclining device, when one of the first reclining mechanism and the second reclining mechanism is locked / unlocked, the other reclining mechanism is also locked / unlocked.
The reclining mechanism and the second reclining mechanism are arranged such that the rotation center axes of the cams are on the same straight line, the base end portion is fixed to the rotation center of the cam of the first reclining mechanism, and the tip side is the rotation center of the cam. A hinge pin extending in the direction of the second reclining mechanism along an axis and a base end portion are fixed to a rotation center of a cam of the second reclining mechanism, and a tip end side is along a rotation center axis of the cam. Extending in the direction of the first reclining mechanism,
A cylindrical body having two parallel sides and an open front end, and the first and second reclining mechanisms are arranged on the rotation center axes of the cams, and one end of the cylindrical body is It is fixed to the hinge pin of the first reclining mechanism, and on the other end side, is fitted in the inner cylinder of the cylindrical body loosely and has a cross-sectional shape of two parallel sides facing two parallel sides of the inner cylinder of the cylindrical body.
A connecting pipe that is formed with a loose fitting portion having a side and rotates integrally with the cam of the second reclining mechanism, and two faces having two parallel sides of the loose fitting portion of the connecting pipe, inside the tubular body. A two-sided reclining device comprising: an elastic projection formed on one of two surfaces of the cylinder having two parallel sides and abutting on the other two surfaces.

The connecting pipe and the cylinder fixed to the cam of the second reclining mechanism are loosely fitted (fitted with clearance). That is, since there is a clearance between the first reclining mechanism and the second reclining mechanism, the mechanism for transmitting the locking / unlocking motion of one reclining mechanism to the other reclining mechanism has a clearance, so that the first reclining mechanism and the second reclining mechanism are provided. After integrating
When attached to the vehicle, even if there is a dimensional error in the first reclining mechanism, the second reclining mechanism, and the floor of the vehicle, the twist of one reclining mechanism is not transmitted to the other reclining mechanism via the connecting pipe,
It does not affect the lock performance.

Further, the connecting pipe and the cylindrical body fixed to the cam of the second reclining mechanism are loosely fitted (fitting with clearance).
The connection is made by providing an elastic projection formed on one of two surfaces having two sides and two surfaces having two parallel sides of the inner cylinder of the tubular body and contacting the other two surfaces. The pipe is located approximately in the center of the clearance, and the lock / unlock timing deviations of the first reclining mechanism and the second reclining mechanism are less likely to occur.

According to a third aspect of the present invention, a first reclining mechanism and a second reclining mechanism for locking / unlocking the tilt of the seat back by rotating a cam provided inside are provided on both sides of the seat, respectively. In the double-sided reclining device, when one of the first reclining mechanism and the second reclining mechanism is locked / unlocked, the other reclining mechanism is also locked / unlocked.
The reclining mechanism and the second reclining mechanism are arranged such that the rotation center axes of the cams are on the same straight line, the base end portion is fixed to the rotation center of the cam of the first reclining mechanism, and the tip side is the rotation center of the cam. A first cylinder extending along the axis in the direction of the second reclining mechanism, having two sides whose cross-sectional shapes are parallel to each other, and having a front end surface which is an open surface; and a rotation center of a cam of the second reclining mechanism. A base end portion is fixedly attached, a front end side extends along the rotation center axis of the cam toward the first reclining mechanism, has two sides having parallel cross-sectional shapes, and the front end surface is an open surface. 2 cylinders,
A loose fitting portion is formed that is loosely fitted in the inner cylinder of the first cylindrical body and has a cross-sectional shape having two parallel sides facing the parallel two sides of the inner cylinder of the first cylindrical body, and the first reclining. A first hinge pin that rotates integrally with the cam of the mechanism, and a parallel 2 that is loosely fitted in the inner cylinder of the second cylinder and has a cross-sectional shape that faces two parallel sides of the inner cylinder of the second cylinder. A loose fitting portion having a side is formed,
A second hinge pin that rotates integrally with the cam of the second reclining mechanism; a connecting pipe having one end fixed to the first hinge pin and the other end fixed to the second hinge pin; The elastic member is attached to at least one of the first hinge pin and the second hinge pin and has two projecting portions that come into contact with two parallel sides of the outer cylinder of the cylinder body of the cam on the one hinge pin side. A double-sided reclining device having a centering member.

The first hinge pin and the first cylinder fixed to the cam of the first reclining mechanism are loosely fitted (fitted with clearance). The second hinge pin and the second
The second cylinder fixed to the cam of the reclining mechanism is
It is a loose fit. That is, since there is a clearance between the first reclining mechanism and the second reclining mechanism, the mechanism for transmitting the locking / unlocking motion of one reclining mechanism to the other reclining mechanism has a clearance, so that the first reclining mechanism and the second reclining mechanism are provided. After integrating
When attached to the vehicle, even if there is a dimensional error in the first reclining mechanism, the second reclining mechanism, and the floor of the vehicle, the twist of one reclining mechanism is not transmitted to the other reclining mechanism via the connecting pipe,
It does not affect the lock performance.

Further, the first hinge pin and the first cylindrical body fixed to the cam of the first reclining mechanism are loosely fitted (fitted with clearance), the second hinge pin and the second hinge pin.
The second cylinder fixed to the cam of the reclining mechanism is
Two protrusions, which are loosely fitted, are attached to one of the first hinge pin and the second hinge pin and are in contact with two parallel sides of the outer cylinder of the cylinder of the cam on the one hinge pin side. By providing the centering member made of an elastic material having
The hinge pin, the connecting pipe, and the second hinge pin are located substantially at the center of the clearance, and the first reclining mechanism and the second reclining mechanism are provided.
It is less likely that the lock / unlock timing of the reclining mechanism will shift.

Further, the cam, cylinder and hinge pin of the first reclining mechanism and the second reclining mechanism can be made common.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) First,
The reclining mechanism of the double-sided reclining device according to the present embodiment will be described. The outer reclining mechanism (first reclining mechanism) and the inner reclining mechanism (second reclining mechanism) have substantially the same structure and have or are not provided with a hinge pin. Therefore, the outer reclining mechanism 90 will be described below. To do.

In the reclining mechanism 90 of this embodiment,
The base arm 100 is attached as a lower arm to the frame 201 on the seat cushion side, and the ratchet 130 is attached to the back frame 202 on the seat back side (see FIGS. 4 to 6).

In particular, as shown in FIGS. 4-7 and 10.
A fitting hole 101 for rotatably supporting the hinge pin 120 is formed in the center of the base arm 100, and further,
Around the fitting hole 101, coaxially with the fitting hole 101, two support portions 102, 103 having the same arcuate cross section and protruding toward the ratchet 130 are formed so as to face each other.

A fitting hole 131 at the center of the ratchet 130
(See FIG. 8), support members 102 and 103 having an arcuate cross section are rotatably fitted to each other.
The ratchet 130 is tiltable with respect to zero.
Then, the outer periphery of the base arm 100 and the ratchet 13
The outer peripheral portion of 0 is joined by a fitting 205 so as to be relatively rotatable. As shown in FIG. 8, a substantially circular recess 132 centered on the tilt center of the ratchet 130 is formed on the surface of the ratchet 130 facing the base arm 100, and inner teeth 133, 134 are formed on the inner peripheral surface of the recess. Is engraved.

Ratchet 13 on the base arm 100
A concave portion 104 (see FIG. 7) is also formed on the surface of the concave portion 0 facing the concave portion 132, and guide projections 105 and 106, which are the first guide means, project toward the ratchet 130 at the upper part of the bottom surface of the concave portion 104. The guide protrusion 10 is provided on the bottom of the bottom surface and is the first guide means toward the ratchet 130.
7, 108 are projected.

The pole 140 is particularly shown in FIGS. 2, 7 and 1.
As shown in 0, it is sandwiched between the guide surfaces 105a and 106a of the guide protrusions 105 and 106 and is slidably guided in a direction orthogonal to the central axis of the tilt, and the outer teeth 141 of the front end portion are the inner teeth 133 of the ratchet 130. It is configured to be able to mesh with. Similarly for the pole 150, the guide protrusion 1
It is sandwiched between the guide surfaces 107a and 108a of 07 and 108, and is slid and guided in a direction orthogonal to the central axis of the tilt,
The outer teeth 151 at the front end portion are configured to be able to mesh with the inner teeth 134 of the ratchet 130.

Further, as shown in FIGS. 2 and 4, on the surfaces of the poles 140 and 150 facing the base arm 100,
A substantially rectangular convex portion 140 protruding in the direction of the base arm 100.
a, 150a are formed, and the convex portions 140a, 150a are formed.
Are formed on the base arm 100, and the poles 140, 15
A groove 100 for guiding 0 in a direction orthogonal to the central axis of tilting.
a, 100b (second guide means).

A cylindrical body 301 is provided at the center of rotation of the cam 170. The cylindrical body 301 has a cam 17 at the base end.
The oval shape is fixed to 0, the tip side extends along the rotation center axis of the cam 170 toward the inner side reclining mechanism, and has two parallel sides in cross section. And the cylindrical body 3
The end surface of 01 is an open surface, and the inner cylinder of the cylinder 301 is an oval hole 171 through which the cam 170 is inserted.

Oval section 123 of hinge pin 120 in cross section
The oval hole 171 of the cam 170 is press-fitted into the shaft, so that the hinge pin 120 and the cam 170 rotate together.

The cam 170 has a base arm 100.
Arc-shaped oblong holes 172 and 173 into which the support members 102 and 103 having an arc-shaped cross section are loosely fitted are formed, and the cam 170 can rotate with respect to the base arm 100 within a certain range.

That is, the cam 170 has the hinge pin 12
0 and rotates with the pressing portions 174 and 175, so that the pressed portions 1 of the rear surfaces 142 and 152 of the poles 140 and 150 are pressed.
The outer teeth 141 and 151 of the pawls 140 and 150 are engaged with the inner teeth 133 and 134 of the ratchet 130 by pushing the outer teeth 141 and 151 of the outer teeth 141 and 151.

In addition to the pressing portion 174 of the cam 170 and the pressed portion 142a of the back surface 142 of the pole 140, the cam 170 and the pole 140 have a pressing portion 174 of the cam 170 when the pole 140 is tilted. The abutment portion 174a formed on one side is attached to the abutment portion 142b of the pole 140.
However, the contact portion 142c of the pole 140 can contact the contact portion 174b formed on the other side of the pressing portion 174 of the cam 170.

Similarly, the cam 170 and the pole 150 have a pressing portion 175 of the cam 170 and a rear surface 1 of the pole 150.
In addition to the pressed portion 152a of 52, when the pole 150 is tilted, the contact portion 175a formed on one side of the pressing portion 175 of the cam 170 is attached to the contact portion 152 of the pole 150.
b is an abutting portion 175b formed on the other side of the pressing portion 175 of the cam 170, and an abutting portion 152c of the pole 150
Can contact.

Protrusions 176 and 177 protruding toward the ratchet 130 are formed on the cam 170. The protrusions 176 and 177 are formed in the holes 18 of the release plate 180.
1, 182 are fitted. Therefore, the cam 170 and the release plate 180 rotate in conjunction with each other.

The release plate 180 is provided with elongated hole-shaped cam holes 183 and 184 which fit into the projections 143 and 153 of the poles 140 and 150 in the plate thickness direction.
The shapes of the cam holes 183 and 184 are such that when the operation lever is rotated in the unlocking direction, the cam surfaces of the cam holes 183 and 184 press the protrusions 143 and 153, and the pole 140,
150 is retracted to the back side, and the outer teeth 141, 15 at the front end
1 is formed to be disengaged from the inner teeth 133 and 134 of the ratchet 130.

Spiral spring 1 as biasing means
The inner ends of the hooks 91 and 195 are hooks 1 of the base arm 100.
11 and 112, the outer end of which is a step portion 17 of the cam 170.
8 and 179, the cam 170 is attached to the poles 140 and 1
The cam 170 is rotationally biased so as to push the back surface of the cam 50.

The hinge pin 120 has an oval-shaped section 1
A small-diameter portion 124 is formed continuously with 23. The operation of the reclining mechanism 90 having the above structure will be described. Normally, the cam 170 pushes the back surface of the poles 140 and 150 by the urging force of the spiral springs 191 and 195,
The outer teeth 141 and 151 of the pawls 140 and 150 mesh with the inner teeth 133 and 134 of the ratchet 130, and rotation of the ratchet (seatback) 130 is prohibited (locked state).

2 and 3, the hinge pin 120 is resisted against the biasing force of the spiral springs 191 and 195.
Is rotated clockwise (arrow direction), the cams 170,
The release plate 180 rotates clockwise.

Then, the poles 140 and 15 of the cam 170 are
0 is released from the rear surface, and the cam surfaces of the cam holes 183 and 184 of the release plate 180 are connected to the pole 1
40, 150 protrusions 143, 153 are pressed,
40 and 150 are retracted to the back side. Therefore, the pawls 140 and 150 are guided by the guide surfaces 105a to 108a of the guide protrusions 105 to 108 and move to the back side, and the outer teeth 141 and 151 of the pawls 140 and 150 and the inner teeth 133 and 134 of the ratchet 130. Then, the ratchet (seat back) 130 becomes tiltable (unlocked state).

Inclining the seat back to a desired angle,
When the operating force on the operating lever is released, the cam 170 pushes the back surface of the poles 140, 150 by the biasing force of the spiral springs 191, 195, and the poles 140, 150
Outer teeth 141, 151 of the inner teeth 13 of the ratchet 130
Re-engages with 3,134 and ratchet (seat back)
The state in which the rotation of 130 is prohibited is restored.

Next, the mechanism for transmitting the movement of the cam 170 of the outer side reclining mechanism 90 to the cam 170 'of the inner side reclining mechanism 90' will be described with reference to FIGS.

First, as shown in FIG. 1, the cam 170 of the outer side reclining mechanism 90 and the cam of the inner side reclining mechanism 90 'are arranged so that their rotation center axes are on the same straight line.

One end of the connecting pipe 311 is fixed to the small diameter portion 124 of the hinge pin 120 of the outer side reclining mechanism 90 by welding. As shown in FIG. 11, an oval portion (a loose fitting portion) 313 having two parallel sides in a sectional shape is formed on the other end side of the connecting pipe 311.
The oval portion 313 is provided on the inner reclining mechanism 9
Oval hole 171 'of cylinder 301' of cam 170 'of 0'
The inner side reclining mechanism 90 'is loosely fitted to the (inner cylinder).
The cam 170 ′ is designed to rotate integrally with the connecting pipe 311. Further, the oval portion 313 of the connecting pipe 311 is made of an elastic material having two projecting portions 315 which come into contact with two parallel sides of the outer cylinder of the cylindrical body 301 'of the cam 170' of the inner reclining mechanism 90 '. The member 317 is press-fitted.

According to this structure, the following effects can be obtained. (1) The connecting pipe 311 and the cylindrical body 301 'fixed to the cam 170' of the inner reclining mechanism 90 'are
It is loose fitting (fitting with clearance). That is, since there is a clearance between the outer reclining mechanism 90 and the inner reclining mechanism 90 ', the mechanism for transmitting the locking / unlocking movement of one reclining mechanism to the other reclining mechanism has a clearance. , When the inner side reclining mechanism 90 'is integrated and then mounted on the vehicle, even if there is a dimensional error in the outer side reclining mechanism 90, the inner side reclining mechanism 90', and the floor of the vehicle, the twist of one of the reclining mechanisms will occur. It is not transmitted to the other reclining mechanism via the connecting pipe 311, and the lock performance is not hindered. (2) The connecting pipe 311 and the cylindrical body 301 'fixed to the cam 170' of the inner reclining mechanism 90 'are
Although it is loose fitting (fitting with clearance), it is fixed to the oval portion (i.e., loose fitting portion) 313 of the connecting pipe 311 and the tubular body 30
Two protrusions 315 that come into contact with two parallel sides of the outer cylinder 1 '
By providing the centering member 317 made of an elastic material, the connecting pipe 311 is located substantially at the center of the clearance, and the lock / unlock timing of the outer side reclining mechanism 90 and the inner side reclining mechanism 90 'is displaced. Hard to do.

The present invention is not limited to the above embodiment. In the above embodiment, the two-sided reclining device in which the operation lever is provided on the outer side reclining mechanism 90 side has been described, but it is also applicable to the both-sided reclining device in which the operation lever is provided on the inner side reclining mechanism 90 ′ side. Needless to say. (Second Embodiment) The difference between this embodiment and the first embodiment is the centering member, and the other structures are the same as those of the first embodiment. Therefore, only the parts different from the first embodiment will be described, the same parts will be denoted by the same reference numerals, and overlapping description will be omitted.

As shown in FIGS. 12 and 13, the cam 1 of the inner side reclining mechanism 90 'is provided on the two surfaces of the oval portion (free fitting portion) 313 of the connecting pipe 311 having two parallel sides.
Elastic projections 351 are formed to abut two parallel sides of the oval hole (inner cylinder) of the cylindrical body 301 'of the 70'. The elastic protrusion 351 can be attached by, for example, an injection molding method.

According to the above configuration, the following effects can be obtained. (1) The connecting pipe 311 and the cylindrical body 301 'fixed to the cam 170' of the inner reclining mechanism 90 'are
It is loose fitting (fitting with clearance). That is, since there is a clearance between the outer reclining mechanism 90 and the inner reclining mechanism 90 ', the mechanism for transmitting the locking / unlocking movement of one reclining mechanism to the other reclining mechanism has a clearance. , When the inner side reclining mechanism 90 'is integrated and then mounted on the vehicle, even if there is a dimensional error in the outer side reclining mechanism 90, the inner side reclining mechanism 90', and the floor of the vehicle, the twist of one of the reclining mechanisms will occur. It is not transmitted to the other reclining mechanism via the connecting pipe 311, and the lock performance is not hindered.

(2) Cylindrical body 3 fixed to the connecting pipe 311 and the cam 170 'of the inner reclining mechanism 90'.
Although 01 'is loose fitting (fitting with clearance), the inner side reclining mechanism 9 is provided on the two surfaces having two parallel sides of the oval portion (free fitting portion) 313 of the connecting pipe 311.
By forming the elastic protrusions 351 that come into contact with the parallel two sides of the oval hole (inner cylinder) of the cylindrical body 301 'of the 0'cam 170', the connecting pipe 311 is positioned substantially at the center of the clearance, and the outer side The lock / unlock timing deviations of the reclining mechanism 90 and the inner reclining mechanism 90 'are less likely to occur.

The present invention is not limited to the above embodiment. In the above embodiment, the two elastic protrusions 351 are formed on the oval portion 313 of the connecting pipe, but they may be formed on the inner cylinder of the cylinder body 301 'of the cam 170'. Further, one of the two elastic protrusions 351 may be provided on the connecting pipe 311 side, and the other may be provided on the cylindrical body 301 'side. (Third Embodiment) In the present embodiment, as shown in FIG. 14, the inner side reclining mechanism 90 'also has
Similar to the outer side reclining mechanism 90, the small diameter portion 12
A hinge pin 120 'having 4'is provided. However, the hinge pin (first hinge pin) of the present embodiment example
120 and hinge pin (second hinge pin) 120 ′ are cam 170, oval hole 171 of cam 170 ′, oval hole 171.
Is loosely fitted to. One end of the connecting pipe 311 has a hinge pin 120 of the outer reclining mechanism 90.
To the small diameter portion 124 of the hinge pin 120 'of the inner side reclining mechanism 90'. That is, the hinge pin 120, the connecting pipe 311, and the hinge pin 120 'are integrated,
The cam 170 and the cam 170 'are loosely fitted.

Then, as shown in FIG. 15, the inner side reclining mechanism 90 'is inserted into the oval portion 123' through which the oval hole 171 'of the cam 170' of the hinge pin 120 'is inserted.
According to the above configuration, the centering member 401 made of an elastic material having the two protruding portions 405 that come into contact with the two parallel sides of the outer cylinder of the cylindrical body 301 'of the cam 170' is press-fitted.
(1) The connecting pipe 311 and the tubular body 301 'fixed to the cam 170' of the inner reclining mechanism 90 'can achieve the following effects.
It is loose fitting (fitting with clearance). That is, since there is a clearance between the outer reclining mechanism 90 and the inner reclining mechanism 90 ', the mechanism for transmitting the locking / unlocking movement of one reclining mechanism to the other reclining mechanism has a clearance. , When the inner side reclining mechanism 90 'is integrated and then mounted on the vehicle, even if there is a dimensional error in the outer side reclining mechanism 90, the inner side reclining mechanism 90', and the floor of the vehicle, the twist of one of the reclining mechanisms will occur. It is not transmitted to the other reclining mechanism via the connecting pipe 311, and the lock performance is not hindered.

(2) Hinge pin 120, connecting pipe 31
1, the hinge pin 120 'is integrated and the cam 170,
Although it is loosely fitted to the cam 170 ', the inner reclining mechanism 90' is inserted into the oval portion 123 'of the hinge pin 120' which is inserted through the oval hole 171 'of the cam 170'.
The centering member 401 made of an elastic material having two protruding portions 405 that come into contact with two parallel sides of the outer cylinder of the cylinder body 301 ′ of the cam 170 ′ of FIG. The pipe 311 and the hinge pin 120 'are located at the approximate center of the clearance, and the locking / unlocking timing deviation of the outer reclining mechanism 90 and the inner reclining mechanism 90' is less likely to occur.

(3) Outer side reclining mechanism 90,
The cam 170, the cam 170 ', the hinge pin 120, and the hinge pin 120' of the inner-side reclining mechanism 90 'can be shared.

The present invention is not limited to the above embodiment. Although the centering member 401 is provided on the hinge pin 120 'side in the above-described embodiment, it may be provided on the hinge pin 120 side, or may be provided on both the hinge pin 120 and the hinge pin 120'.

[0051]

As described above, according to the first aspect of the invention, the connecting pipe and the cylindrical body fixed to the cam of the second reclining mechanism are loosely fitted (fitted with clearance).
Is. That is, since there is a clearance between the first reclining mechanism and the second reclining mechanism, the mechanism for transmitting the locking / unlocking motion of one reclining mechanism to the other reclining mechanism has a clearance, so that the first reclining mechanism and the second reclining mechanism are provided. After being integrated, when installed in the vehicle, even if there is a dimensional error in the first reclining mechanism, the second reclining mechanism, and the floor of the vehicle, the twist of one reclining mechanism will be transferred to the other reclining mechanism via the connecting pipe. It will not be transmitted and will not affect the lock performance.

Further, although the connecting pipe and the cylindrical body fixed to the cam of the second reclining mechanism are loose fitting (fitting with clearance), they are fixed to the other end side of the connecting pipe, By providing a centering member made of an elastic material having two protruding portions that come into contact with two parallel sides of the outer cylinder of the cylindrical body, the connecting pipe is located at approximately the center of the clearance, and the first reclining mechanism and the second reclining mechanism are provided. It is less likely that the lock / unlock timing of the reclining mechanism will shift.

According to the second aspect of the invention, the connecting pipe and the cylindrical body fixed to the cam of the second reclining mechanism are loosely fitted (fitted with clearance). That is, since there is a clearance between the first reclining mechanism and the second reclining mechanism, the mechanism for transmitting the locking / unlocking motion of one reclining mechanism to the other reclining mechanism has a clearance, so that the first reclining mechanism and the second reclining mechanism are provided. After being integrated, when installed in the vehicle, even if there is a dimensional error in the first reclining mechanism, the second reclining mechanism, and the floor of the vehicle, the twist of one reclining mechanism will be transferred to the other reclining mechanism via the connecting pipe. It will not be transmitted and will not affect the lock performance.

Further, the connecting pipe and the cylindrical body fixed to the cam of the second reclining mechanism are loosely fitted (fitting with clearance).
The connection is made by providing an elastic projection formed on one of two surfaces having two sides and two surfaces having two parallel sides of the inner cylinder of the tubular body and contacting the other two surfaces. The pipe is located approximately in the center of the clearance, and the lock / unlock timing deviations of the first reclining mechanism and the second reclining mechanism are less likely to occur.

According to the third aspect of the invention, the first hinge pin and the first cylindrical body fixed to the cam of the first reclining mechanism are loosely fitted (fitted with clearance).
Further, the second hinge pin and the second cylindrical body fixed to the cam of the second reclining mechanism are loosely fitted. That is, the first
Between the reclining mechanism and the second reclining mechanism,
Since there is a clearance in the mechanism for transmitting the locking / unlocking movement of one reclining mechanism to the other reclining mechanism, the first reclining mechanism is integrated with the first reclining mechanism and the second reclining mechanism, and then the first reclining mechanism is installed. Even if there is a dimensional error in the mechanism, the second reclining mechanism, and the floor of the vehicle, the twist of one reclining mechanism is not transmitted to the other reclining mechanism via the connecting pipe, and the locking performance is not hindered.

Furthermore, the first hinge pin and the first cylinder fixed to the cam of the first reclining mechanism are loosely fitted (fitted with clearance), and the second hinge pin and the second hinge pin are attached.
The second cylinder fixed to the cam of the reclining mechanism is
Two protrusions, which are loosely fitted, are attached to one of the first hinge pin and the second hinge pin and are in contact with two parallel sides of the outer cylinder of the cylinder of the cam on the one hinge pin side. By providing the centering member made of an elastic material having
The hinge pin, the connecting pipe, and the second hinge pin are located substantially at the center of the clearance, and the first reclining mechanism and the second reclining mechanism are provided.
It is less likely that the lock / unlock timing of the reclining mechanism will shift.

Further, the cam, cylinder and hinge pin of the first reclining mechanism and the second reclining mechanism can be made common.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a connection of a connecting pipe of a double-sided reclining device according to a first embodiment.

FIG. 2 is a front view with the base arm removed from FIG. 3 showing the outer side reclining mechanism of the double-sided reclining device of the first embodiment.

FIG. 3 is a front view showing the outer appearance of an outer reclining mechanism of the double-sided reclining device according to the first embodiment.

FIG. 4 is a cross-sectional view taken along the line C-C in FIGS. 2 and 3.

FIG. 5 is a cross-sectional view taken along the line D-D in FIGS. 2 and 3.

FIG. 6 is a cross-sectional view taken along the section line EE in FIGS. 2 and 3.

FIG. 7 is the base arm of FIG.

FIG. 8 is the ratchet of FIG.

9 is the cam of FIG.

FIG. 10 is a schematic exploded perspective view of a main part of an outer side reclining mechanism of the double-sided reclining device according to the first embodiment.

FIG. 11 is a perspective view of the invented portion of the first embodiment.

FIG. 12 is a perspective view of the invented portion of a second embodiment.

13 is a front view of the connection pipe as seen from the direction of arrow G in FIG.

FIG. 14 is a view for explaining the connection of the connecting pipes of the double-sided reclining device of the third embodiment.

FIG. 15 is a perspective view of the invented portion of the third embodiment.

FIG. 16 is a diagram illustrating a seat provided with a reclining device on both sides.

[Explanation of symbols]

90 Outer side reclining mechanism 90 'inner reclining machine 120,120 'Hinge pin 301, 301 'cylindrical body 311 Connection pipe 315 protrusion 317 Centering member

Claims (3)

[Claims] 1. A first reclining mechanism and a second reclining mechanism for locking / unlocking tilting of a seat back by rotating a cam provided inside thereof, respectively. Mechanism and a second reclining mechanism, wherein both sides of the reclining mechanism are locked / unlocked when the other reclining mechanism is locked / unlocked. In the double-sided reclining device, the rotation center of the cam of the first reclining mechanism or the second reclining mechanism The shafts are arranged so as to be on the same straight line, the proximal end portion is fixed to the rotation center of the cam of the first reclining mechanism, and the tip end side is directed along the rotation center axis of the cam toward the second reclining mechanism. A hinge pin extending toward the second reclining mechanism The base end portion is fixed to the rotation center of the cam, the tip end side extends along the rotation center axis of the cam toward the first reclining mechanism, has two sides with parallel cross-sectional shapes, and the tip end surface is open. A cylindrical body having a surface, the first reclining mechanism, and the second reclining mechanism, which are disposed on the rotation center axes of the cams of the second reclining mechanism, and have one end fixed to the hinge pin of the first reclining mechanism and the other end side. Is formed with a loose fitting portion that is loosely fitted in the inner cylinder of the cylindrical body and has a cross-sectional shape having two parallel sides that face two parallel sides of the inner cylinder of the cylindrical body, and the second reclining mechanism. A connecting pipe that rotates integrally with the cam, and an elastic member that is fixed to the other end of the connecting pipe and has two projecting portions that come into contact with two parallel sides of the outer cylinder of the cylindrical body. A centering member, and Reclining device. 2. A first reclining mechanism and a second reclining mechanism for locking / unlocking the tilting of the seat back by rotating a cam provided inside, respectively, are provided on both sides of the seat, and the first reclining mechanism is provided. Mechanism and a second reclining mechanism, wherein both sides of the reclining mechanism are locked / unlocked when the other reclining mechanism is locked / unlocked. In the double-sided reclining device, the rotation center of the cam of the first reclining mechanism or the second reclining mechanism The shafts are arranged so as to be on the same straight line, the proximal end portion is fixed to the rotation center of the cam of the first reclining mechanism, and the tip end side is directed along the rotation center axis of the cam toward the second reclining mechanism. A hinge pin extending toward the second reclining mechanism The base end portion is fixed to the rotation center of the cam, the tip end side extends along the rotation center axis of the cam toward the first reclining mechanism, has two sides with parallel cross-sectional shapes, and the tip end surface is open. A cylindrical body having a surface, the first reclining mechanism, and the second reclining mechanism, which are disposed on the rotation center axes of the cams of the second reclining mechanism, and have one end fixed to the hinge pin of the first reclining mechanism and the other end side. Is formed with a loose fitting portion that is loosely fitted in the inner cylinder of the cylindrical body and has two parallel sides whose cross-sectional shape faces two parallel sides of the inner cylinder of the cylindrical body. Two of the connecting pipe that rotates integrally with the cam, the two faces of the loose fitting portion of the connecting pipe that have two parallel sides, and the two faces of the inner cylinder of the tubular body that have two parallel sides.
A two-sided reclining device having an elastic protrusion formed on one surface and abutting on the other two surfaces. 3. A first reclining mechanism and a second reclining mechanism for locking / unlocking the tilting of the seat back by rotating a cam provided therein, respectively. Mechanism and a second reclining mechanism, wherein both sides of the reclining mechanism are locked / unlocked when the other reclining mechanism is locked / unlocked. In the double-sided reclining device, the rotation center of the cam of the first reclining mechanism or the second reclining mechanism The shafts are arranged so as to be on the same straight line, the base end portion is fixed to the rotation center of the cam of the first reclining mechanism, and the tip end side extends in the direction of the second reclining mechanism along the rotation center axis of the cam. It has two sides that are parallel to each other and the cross-sectional shape is parallel, and the end surface is an open surface A base end portion is fixed to the rotation center of the cam of the first reclining mechanism and the second reclining mechanism, and the tip end side extends in the direction of the first reclining mechanism along the rotation center axis of the cam and has a parallel sectional shape. A second cylinder having two sides and an open end surface; and two parallel sides of the inner cylinder of the first cylinder that are loosely fitted to the inner cylinder of the first cylinder. A first hinge pin that is formed with a loose fitting portion having two parallel parallel sides and rotates integrally with the cam of the first reclining mechanism, and is loosely fitted into the inner cylinder of the second cylindrical body, and has a sectional shape. And a second hinge pin that forms a loose fitting portion having two parallel sides that face two parallel sides of the inner cylinder of the second tubular body and that rotates integrally with the cam of the second reclining mechanism. , One end is fixed to the first hinge pin, and the other end is fixed to the second hinge pin. Connected pipe, and two protrusions attached to at least one hinge pin of the first hinge pin and the second hinge pin and abutting on two parallel sides of the outer cylinder of the cylinder body of the cam on the one hinge pin side. A centering member made of an elastic material having a portion, and a two-sided reclining device.