JP2001037571A - Reclining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reclining device which can prevent a delay in the time to unlock an inner reclining mechanism with respect to the time to unlock an outer reclining mechanism, and which allows use of common parts for the reclining mechanisms when used in an automobile with a driver's seat and a front passenger seat, enabling a reduction in manufacturing costs. SOLUTION: An outer reclining mechanism and an inner reclining mechanism are arranged in plane symmetry and the rotating part of the inner reclining mechanism is rotated and biased relative to the rotating part (shaft 20) of the outer reclining mechanism. Connections at both ends of a connecting pipe are given a phase difference to prevent a delay in the time to unlock the outer reclining mechanism by means of a release lever 60 with respect to the time to unlock the inner reclining mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining device used for a seat of an automobile or the like, and more particularly, to a reclining mechanism arranged on an outer side and an inner side of a seat.
A release lever for unlocking operation is provided on the outer reclining mechanism, and a rotating section of the inner reclining mechanism is connected to a rotating section of the outer reclining mechanism via a connecting pipe, so that the outer reclining mechanism and the inner reclining mechanism are connected. The present invention relates to a reclining device for interlocking with a reclining device.

[0002]

2. Description of the Related Art When reclining mechanisms are arranged on the outer and inner sides of a seat, a release lever for releasing the lock is directly connected to the outer reclining mechanism, so that the outer reclining mechanism can be directly operated. . On the other hand, the inner reclining mechanism
It is connected to the outer-side reclining mechanism via a connecting pipe, and the transmission of the operating force from the release lever to the inner-side reclining mechanism is performed via the outer-side reclining mechanism and the connecting pipe. For this reason, the transmission of the operating force of the release lever to the inner reclining mechanism is slower than the transmission to the outer reclining mechanism.

[0003] Specifically, there is a gap between members on the motion transmission path from the outer reclining mechanism to the inner reclining mechanism, or the connecting pipe is elastically deformed and twisted, so that motion transmission is delayed.

However, it is necessary to synchronize the unlocking of the outer and inner reclining mechanisms. Therefore, conventionally, a mechanism for eliminating a delay in unlocking the inner-side reclining mechanism is incorporated in the inner-side or outer-side reclining mechanism.

In a reclining device, for example, internal teeth are provided on an upper arm that tilts with a seat back, and a pole (external teeth) engaging and disengaging from the internal teeth is provided on a lower arm on a seat cushion side. In some cases, the inclination angle of the seat back is adjusted to an arbitrary angle by changing the relative meshing position relationship. In this reclining device, a pin is set up on a pole, this pin is slid into contact with a cam hole, the pin is moved by movement of the cam hole, and finally the engagement between the internal teeth and the pole is released, and the lock is performed. Release is performed.

In such a reclining device, in order to eliminate a delay in unlocking the inner reclining mechanism, the inner reclining mechanism and the outer reclining mechanism have different shapes such as cam holes and poles.

[0007]

Assuming that a reclining device is used in an automobile having a driver's seat and a passenger's seat, the outer reclining mechanism of the driver's seat and the inner reclining mechanism of the passenger's seat are in the same direction (left direction). ), And it is easy to use common parts. Similarly, the inner reclining mechanism of the driver's seat and the outer reclining mechanism of the passenger's seat face in the same direction (rightward), and it is easy to share parts.

However, when the above-described conventional structure is used as the reclining device, the outer reclining mechanism and the inner reclining mechanism have different shapes such as cam holes and poles, and the internal structure cannot be shared. For this reason, the outer reclining mechanism of the driver's seat and the inner reclining mechanism of the front passenger's seat cannot have the same structure even though they face the same direction. Regarding the outer reclining mechanism of the seat, it is not possible to have the same structure even though it faces the same direction.

Of course, the outer reclining mechanism and the inner reclining mechanism in each of the driver's seat and the passenger's seat have a plane-symmetric structure, and therefore cannot have the same structure.

Therefore, the four reclining mechanisms used on the outer side and the inner side of the driver's seat and the passenger's seat all have different structures. Therefore, the conventional reclining device has a problem that the number of parts increases and the manufacturing cost cannot be reduced.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to eliminate a delay in unlocking timing of an inner reclining mechanism with respect to unlocking timing of an outer reclining mechanism. It is an object of the present invention to provide a reclining device which can be used for a vehicle having a seat, in which parts of a reclining mechanism can be shared, and which can reduce manufacturing costs.

[0012]

According to the first aspect of the present invention, a reclining mechanism is disposed on an outer side and an inner side of a seat, and a release lever for unlocking operation is provided on the outer reclining mechanism. A reclining device that connects a rotating portion of an inner reclining mechanism to a rotating portion of the outer reclining mechanism via a connecting pipe, and interlocks the outer reclining mechanism and the inner reclining mechanism. The mechanism and the inner reclining mechanism are configured to be plane-symmetric,
In addition, the rotation part of the inner reclining mechanism is relatively rotationally displaced with respect to the rotation part of the outer reclining mechanism, and the inner reclining mechanism is moved with respect to the release timing of the lock of the outer reclining mechanism by the release lever. The connecting portions at both ends of the connecting pipe are provided with a phase difference so as to eliminate the delay of the lock release timing.

According to the present invention, the connecting pipe is used to eliminate the delay of the unlock timing of the inner reclining mechanism with respect to the unlock timing of the outer reclining mechanism, and the outer reclining mechanism, the inner reclining mechanism and When used in an automobile with a driver's seat and a passenger seat, the outer reclining mechanism on the driver's seat and the inner reclining mechanism on the passenger's seat can have the same structure. The reclining mechanism on the side and the outer reclining mechanism on the passenger seat can have the same structure. Therefore, the types of the reclining mechanisms used in total on the outer side and inner side of the driver's seat and the passenger's seat are reduced by half, the number of parts is reduced, and the manufacturing cost can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the connecting portions at both ends of the connecting pipe have square holes coaxially fitted with the rotating portions of the outer and inner reclining mechanisms. Are formed with a phase difference in the rotation direction.

According to the present invention, the processing of the connecting pipe simply involves forming square holes at both ends with a phase difference in the rotational direction, and the processing is easy, so that the manufacturing cost can be further reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a side view showing an outer reclining mechanism in a driver's seat of a right-hand drive vehicle, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG.
1 is an exploded perspective view of a main part in FIG. 1, and FIG. 4 is a perspective view of a connecting pipe.

In these figures, a circular hole 11 is formed in the lower arm 10 attached to the seat cushion side, and a cylindrical portion 21 of a shaft 20 is rotatably inserted into the hole 11. A hole 31 of a ratchet plate (upper arm) 30 attached to the seat back side is rotatably fitted to the other cylindrical portion 22 of the shaft 20.

The lower arm 10 has an arc-shaped protrusion 12 projecting toward the ratchet plate 30 and concentric with the hole 11.
A concave portion 13 formed by half-flow processing protruding to the opposite side is provided. The recess 13 has a hole 11
And a circular portion 13b connected to the rectangular portion 13a and concentric with the hole 11. The rectangular portion 13a has an elongated hole 14 extending in parallel with the side of the rectangular portion 13a.
Are drilled.

A recess 32 facing the recess 13 of the lower arm 10 is formed in the ratchet plate 30 by half-flow processing. The concave portion 32 is composed of a circular portion 32 a centered on the hole 31 and a sector portion 32 b, and the inner peripheral wall surface of the circular portion 32 a is formed by an arc-shaped convex portion 1 of the lower arm 10.
2 is sliding on the outer peripheral wall surface. Further, internal teeth 33 are formed on the inner peripheral portion of the sector 32b, and the ratchet plate 30 is formed.
An arc-shaped projection 34 centering on the hole 31 is formed at the bottom of the concave portion 32 by half-flow processing toward the lower arm 10 side.

In the space defined by the recess 13 of the lower arm 10 and the recess 32 of the ratchet plate 30, a pole 4 is provided.
0 and a cam plate 50 are provided. Paul 40
Is movable in the longitudinal direction of the elongated hole 14 in the rectangular portion 13a, has external teeth 41 that can be disengaged from the internal teeth 33 of the ratchet plate 30, and the inclined surface 42 on the opposite side to the external teeth 41 is It is in contact with the cam surface 51 of the cam plate 50. Further, a pin 43 that can slide in the elongated hole 14 is implanted in the pole 40.

The cam plate 50 has a cam surface 52 on the side opposite to the cam surface 51. The cam surface 52 is in contact with the inner peripheral wall surface of the arc-shaped projection 34 of the ratchet plate 30. An oval hole (an oval hole) 53 is formed in the center of the cam plate 50.
(An oval section in section) 23 is fitted, and rotates together with the shaft 20.

A release lever 60 is disposed on a surface of the lower arm 10 opposite to the surface on which the recess 13 is formed. The release lever 60 is provided with an oval hole 61 that fits with the oval portion 24 of the shaft 20 so as to rotate integrally with the shaft 20. Further, a cam hole 62 is formed in the release lever 60.
, A pin 43 is slidably fitted.

Here, the cam hole 62 is an arc-shaped hole 62a having a constant distance from the rotation center (the center of the oval hole 61) O.
1, and an inclined hole 62b for moving the pin 43 in the direction of the rotation center O when the release lever 60 rotates clockwise in FIG. The arc-shaped hole 62a has a sufficient length so that the half-lock state does not occur.

The release lever 60 is urged counterclockwise in FIG. 1 by a spring (not shown). The operating portion 63 is to be gripped when the operator lifts the release lever 60 against the elastic force of the spring at the time of unlocking.

The shaft 20 forms a rotating portion of the outer reclining mechanism, and a square column-shaped connecting portion 25 projects toward the inner reclining mechanism (not shown). In order to prevent the shaft 20 from coming off, the shaft 2
The E-ring 26 is locked at 0.

In this embodiment, the inner reclining mechanism is formed symmetrically with the outer reclining mechanism. However, a release lever is not attached to the inner-side reclining mechanism, and a plate corresponding to the release lever 60 from which the operation unit 63 is removed is attached to a shaft that forms a rotating part of the inner-side reclining mechanism. I have.

The shaft 2 of the outer reclining mechanism
The square-column-shaped connecting portion 25 at 0 and the square-column-shaped connecting portion of the shaft of the inner-side reclining mechanism (not shown) are connected by a connecting pipe 70 shown in FIG.

Square holes 73, 74 coaxially fitted with the rotating portions of the outer and inner reclining mechanisms are provided at the connecting portions 71, 72 at both ends of the connecting pipe 70.
Are formed with a phase difference θ in the rotation direction. FIG.
In other words, the shaft 20 of the outer reclining mechanism
The square hole 74 in which the square pillar-shaped connecting portion of the shaft of the inner reclining mechanism is fitted is located at a position rotated clockwise by the angle θ with respect to the square hole 73 in which the square pillar-shaped connecting portion 25 is fitted. The setting of θ will be described later.

Next, the operation of the above embodiment will be described. FIG.
Indicates a locked state, the cam surface 51 of the cam plate 50 presses the inclined surface 42 of the pawl 40, the external teeth 41 of the pawl 40 mesh with the internal teeth 33 of the ratchet plate 30, and the ratchet plate 30 ( Tilt of the seat back) is prohibited.

In this locked state, when the release lever 60 is operated clockwise in FIG. 1 against the urging force of a spring (not shown), the cam plate 50 rotates, and the cam surface 51 of the cam plate 50 tilts the pawl 40. The inclined hole 62b of the cam hole 62 moves away from the surface 42.
Moves the pin 43 toward the rotation center O, and moves the pawl 40 in a direction away from the internal teeth 33.

When the release lever 60 is rotated by a predetermined amount, the external teeth 41 of the pawl 40 and the ratchet plate 30
Is disengaged from the internal teeth 33, and the ratchet plate 30 is unlocked, so that the ratchet plate 30 can tilt in the front-rear direction.

When the operating force of the release lever 60 is released after the ratchet plate 30 is tilted to a desired tilt angle, the release lever 60 is moved in the direction of returning to the locked state by the urging force of a spring (not shown), and the cam plate is rotated. 50 also rotates toward the original position, and the cam plate 5
0 of the pawl 40 presses the inclined surface 42 of the pawl 40, and the outer teeth 41 of the pawl 40
3, and the ratchet plate 30 is again in the locked state in which the tilting of the ratchet plate 30 is prohibited.

Here, the square pillar-shaped connecting part 25 of the shaft 20 of the outer reclining mechanism and the square pillar-shaped connecting part of the shaft of the inner reclining mechanism (not shown) are connected by the connecting pipe 70. The reclining mechanism will be interlocked.

In this embodiment, the rotation of the shaft 20 of the outer reclining mechanism is controlled by the connecting pipe 70.
Is transmitted to the shaft of the inner-side reclining mechanism through the shaft. Here, since the outer-side reclining mechanism and the inner-side reclining mechanism are configured to be plane-symmetric, if the shafts in both reclining mechanisms rotate accurately in synchronization, the unlocking will be performed at the same timing. .

However, when transmitting the rotation of the shaft 20 to the shaft of the inner reclining mechanism via the connecting pipe 70, the connecting pipe 70
Torque. For this reason, connecting pipe 7
0 is twisted, and the shaft of the inner reclining mechanism starts to rotate later than the shaft 20. Furthermore, the shaft 20 of the outer-side reclining mechanism
There is a play in the rotational direction between the square pillar-shaped connecting portion 25 and the square pillar-shaped connecting portion of the shaft of the inner-side reclining mechanism, and the fitting portion between the square holes 73 and 74 of the connecting portions 71 and 72 at both ends of the connecting pipe 70. When there is, the shaft of the inner-side reclining mechanism starts rotating later than the shaft 20 by that much.

In the present embodiment, the rotation of the shaft 20 is started, and then the rotation of the shaft 20 is determined in advance to determine the rotation of the shaft of the inner-side reclining mechanism (this rotation delay angle θa is the same). The position of the square hole 74 with respect to the square hole 73 in the connecting pipe 70 is rotated clockwise in FIG. 4 by the rotation delay angle θa (θ = θa). . For this reason, connecting pipe 7
After the mounting, the shaft of the inner-side reclining mechanism is in a state of being rotated in the unlocking direction by the rotation delay angle θa.

Therefore, even if the shaft of the inner-side reclining mechanism starts rotating with a delay from the shaft 20, the shaft of the inner-side reclining mechanism is rotated in advance by that much, so that the poles in both reclining mechanisms are rotated. Of the ratchet plate and the external teeth of the ratchet plate are simultaneously unlocked and brought into an unlocked state.

As described above, in the above embodiment, the connecting pipe 70 is used to eliminate the delay of the unlock timing of the inner reclining mechanism with respect to the unlock timing of the outer reclining mechanism.
In addition, since the outer-side reclining mechanism and the inner-side reclining mechanism are configured in plane symmetry, when used in a vehicle having a driver's seat and a passenger seat, the outer reclining mechanism of the driver's seat and the inner reclining of the passenger's seat are used. The mechanism can have the same structure, and the inner reclining mechanism on the driver's seat and the outer reclining mechanism on the passenger's seat can have the same structure. Therefore, the types of the reclining mechanisms used in total on the outer side and inner side of the driver's seat and the passenger's seat are reduced by half, the number of parts is reduced, and the manufacturing cost can be reduced.

Further, square holes 73 and 74 which are coaxially fitted with the rotating portions of the outer and inner reclining mechanisms are formed in the connecting portions at both ends of the connecting pipe 70 with a phase difference in the rotating direction. Since the delay of the lock release timing of the inner reclining mechanism is eliminated, the processing of the connecting pipe 70 is easy,
Manufacturing costs can be further reduced.

(Second Embodiment) According to the present invention, a reclining mechanism is disposed on the outer side and inner side of a seat, a release lever for unlocking operation is provided on the outer reclining mechanism, and the outer reclining mechanism is provided. The present invention can be applied to any reclining device in which the rotating portion of the inner reclining mechanism is connected to the rotating portion via a connecting pipe, and the outer reclining mechanism and the inner reclining mechanism are linked. For example, the present invention can be applied to a reclining device as shown in FIGS.

Here, FIG. 6 is an exploded perspective view of an essential part showing the outer reclining mechanism in the second embodiment, FIG. 7 is an exploded perspective view of the cylindrical portion of the upper arm in FIG. 6, and FIG. 8 is FIG. FIG. 9 is a cross-sectional view of the seat provided with the reclining mechanism, and FIG.

As shown in FIGS. 6 and 7, the lower arm 2
A shaft 290, which forms a rotating part of the outer-side reclining mechanism, is rotatably inserted into the through hole 221 formed at 20. Also, in the lower part of the upper arm 210,
The cylindrical portion 23 whose bottom surface 231 faces the lower arm 220
0 is formed.

A substantially triangular disk 240 is provided inside the cylindrical portion 230. Note that the shape of the disk 240 is set to a size that allows rotation within the cylindrical portion 230. At the center of the disk 240 is a cylindrical projection 2
41 are formed. The cylindrical protrusion 241 is engaged with the hole 233 of the cylindrical portion 230 of the upper arm 210, and is attached to the lower arm 220 using four pins 243 and one spring hook pin 247.

Further, a hole 245 into which the shaft 290 is loosely fitted is formed at the center of the projection 241. Therefore,
The upper arm 210 is rotatable about a shaft 290 with respect to the lower arm 220.

As shown in FIG. 9, the disk 240 is disposed in the cylindrical portion 230 of the upper arm 210, so that the direction between the outer peripheral surface of the disk 240 and the inner peripheral surface of the cylindrical portion 230 is changed. Three approximately crescent-shaped spaces formed by two opposite wedge-shaped spaces are formed.

The disk 240 of this embodiment has a flange 240a formed in the shaft 290 direction.
Rollers 250 and 251 as a pair of rolling elements are provided in each of the substantially crescent-shaped spaces.
251 are urged by a spring 253 in a direction away from each other, that is, in a direction of pressing against the inner peripheral surface of the cylindrical portion 230 and the outer peripheral surface (flange portion 240a) of the disk 240.

Returning to FIG. 6 and FIG. 7, a disk with a claw and a pressure plate as reclining lock releasing means will be described. Adjacent to the disk 240, a disk 260 with claws is provided. The disk with a claw 260 has a shaft 290
A hole 261 into which the shaft 290 is loosely fitted is formed at the center so that the shaft 290 can be moved along.

On the surface of the disk 260 with the claws opposed to the disk 240, the disk is positioned between the rollers 250 and 251 provided with the top of the disk 240 interposed therebetween.
Three claws 263 having oblique sides facing 1 are formed. Then, as shown in FIG. 7, the slope of each claw 263,
Between the rollers 250 and 251, there are triangular pieces 265 and 267.
Is arranged.

As shown in FIG. 6, an oval hole 271 is formed at the center of the pressure plate 270 provided adjacent to the disk 260 with the claw, into which the second oval portion 296 of the shaft 290 is fitted. , Engaging the shaft 290
The ring 275 prevents the falling off.

Claw disk 26 of pressure plate 270
On the surface facing 0, three protrusions 273 having inclined surfaces are formed. The pressure plate 270 is also provided on the surface of the disk 260 with the claw facing the pressure plate 270.
The projection 273 can be in contact with the projection 273, and three projections 269 having an inclination opposite to the inclination of the slope of the projection 273 are formed.

Note that the projection 269 is provided with a claw 263 in the circumferential direction.
It was provided in the same place as. Accordingly, the rotation of the pressure plate 270 of the reclining lock releasing means causes the claw disk 260 to advance and retreat along the shaft 290.

The shaft 290 has six parts.
That is, the first cylindrical portion 291 which is loosely fitted in the through hole 221 of the lower arm 220 and the hole 245 of the disk 240 and the oval hole 281 of the release lever 280 arranged on the lower arm 220 and whose tip is crimped A first oval portion 292 and a flange portion 293 which comes into contact with the inner bottom surface 231 of the disk 240 to prevent the shaft 290 from coming off;
The second cylindrical portion 294 formed with the slit 295 and the second oval hole 271 of the pressure plate 270 are fitted into the second cylindrical portion 294.
The third oval portion 2 into which the oval portion 296 of the connecting pipe 400 for transmitting the movement of the shaft 290 to the reclining device on the other side is fitted.
97.

Therefore, when the release lever 280 is rotated about the shaft 290, the rotation is
90, the pressure is transmitted to the pressure plate 270 of the second oval portion 296 and the connecting pipe 400 of the third oval portion 297.

The release arm 2 is attached to the lower arm 220.
A pin 223 that engages with an arc-shaped guide hole 283 centered on a shaft 290 formed at 80 is provided upright to restrict the rotation range of the release lever 280.

The inner end is a slit 294 of the shaft 290.
The pressure plate 270 is rotated in a direction (lock direction) in which the disc 260 with the claw is separated from the release lever 280 (the cylindrical portion 230) by the spring 510 whose outer end is locked by the spring hook pin 247. It is being rushed.

The upper arm 210 and the seat back frame 300 are fixed by a spring 540 whose inner end is locked by a bracket 520 attached to the lower arm 220 and whose outer end is locked by a bracket 530 attached to the upper arm 210. Is biased in the forward falling direction.

Further, the upper arm 210 is provided with a lower arm 2 for restricting a tilt range of the upper arm 210.
20 is formed with an end 225a, 2 of a notch 225.
A cut-and-raised portion 221 that can be brought into contact with 25b is formed.

Also in this embodiment, the inner reclining mechanism is formed symmetrically with the outer reclining mechanism. However, the release lever 280 is not attached to the inner reclining mechanism, and a plate corresponding to the release lever 280 from which the operation unit 280a is removed is attached to a shaft forming a rotating part of the inner reclining mechanism. ing.

The connecting portion (oval portion 297) of the shaft 290 of the outer-side reclining mechanism and the connecting portion of the shaft of the inner-side reclining mechanism (not shown) are connected by a connecting pipe 400 so as to be interlocked. .

At the connecting portions at both ends of the connecting pipe 400, square holes (in this specification, including oval holes, which are coaxially fitted with the rotating portions of the outer and inner reclining mechanisms) are used. Are formed with a phase difference θ in the rotation direction, just like in the first embodiment.

Next, the operation of the above embodiment will be described. In the locked state, the pressure plate 270 is rotationally urged by the urging force of the spring 510 in a direction in which the claw disk 260 is separated from the release lever 280 (the cylindrical portion 230). That is, the rollers 250 and 251 press against the inner peripheral surface of the cylindrical portion 230 of the upper arm 210 and the outer peripheral surface of the disk 240, and the rotation of the upper arm 210 is prohibited.

Here, the operating section 2 of the release lever 280
When the lever 80a is rotated upward against the urging force of the spring 510, the pressure plate 270 rotates via the shaft 290, and the disc 260 with the pawl is
Move toward 80. The rotation of the release lever 280 is also transmitted to the connecting pipe 400 and also to the shaft 290 of the reclining device on the other side.

The movement of the disk with a claw 260 causes the claw 263 to move to the release lever 280 between the triangular pieces 265 and 267. When the claw 263 moves in the direction of the release lever 280, the interval between the roller 250 and the roller 251 increases through the triangular pieces 265 and 267, and the rollers 250 and 251 move.
The contact state between the disk and the outer peripheral surface of the disk 240 is released, and the upper arm 210 and the seat back frame 300 (seat back) can be rotated.

After obtaining the desired rotation of the upper arm 210 and the seat back frame 300 (inclination of the seat back),
When the operation force of the release lever 280 on the operation unit 280a is released, the release lever 280 and the pressure plate 270 move toward the locked position by the urging force of the spring 510. When the pressure plate 270 returns to the original position, the claw disk 260 also moves in a direction away from the release lever 280, and returns to the locked state.

Also in this embodiment, the rotation of the shaft 290 of the outer reclining mechanism is controlled by the connecting pipe 4.
, And is transmitted to the shaft of the inner-side reclining mechanism. Here, since the outer-side reclining mechanism and the inner-side reclining mechanism are configured to be plane-symmetric, if the shafts in both reclining mechanisms rotate accurately in synchronization, the unlocking will be performed at the same timing. .

However, when transmitting the rotation of the shaft 290 to the shaft of the inner-side reclining mechanism via the connecting pipe 400, torque is applied to the connecting pipe 400. For this reason, the connecting pipe 400 is twisted, and the shaft of the inner-side reclining mechanism starts to rotate later than the shaft 290. Furthermore, if there is any play in the rotational direction at the fitting portion between the connecting portions of the shaft 290 of the outer reclining mechanism and the shaft of the inner reclining mechanism, and the square holes at the connecting portions at both ends of the connecting pipe 400, further play may occur. The shaft of the inner-side reclining mechanism starts rotating later than the shaft 290.

In this embodiment, as in the case of the first embodiment, the rotation of the shaft 290 starts. After that, it is determined in advance how much the shaft 290 should rotate before the rotation of the shaft of the inner reclining mechanism starts. Then, the square holes at both ends of the connecting pipe 400 have a phase difference by the rotation delay angle θa. Therefore, even if the shaft of the inner-side reclining mechanism starts rotating later than the shaft 290, the shaft of the inner-side reclining mechanism is previously rotated by that much, so that the two reclining mechanisms are simultaneously unlocked. Becomes

As described above, also in this embodiment, the connecting pipe 400 is used to eliminate the delay of the unlock timing of the inner reclining mechanism with respect to the unlock timing of the outer reclining mechanism.
In addition, since the outer-side reclining mechanism and the inner-side reclining mechanism are configured in plane symmetry, when used in a vehicle having a driver's seat and a passenger seat, the outer reclining mechanism of the driver's seat and the inner reclining of the passenger's seat are used. The mechanism can have the same structure, and the inner reclining mechanism on the driver's seat and the outer reclining mechanism on the passenger's seat can have the same structure. Therefore, the types of the reclining mechanisms used in total on the outer side and inner side of the driver's seat and the passenger's seat are reduced by half, the number of parts is reduced, and the manufacturing cost can be reduced.

Further, square holes which coaxially fit with the rotating portions of the outer and inner reclining mechanisms are formed at the connecting portions at both ends of the connecting pipe 400 with a phase difference in the rotating direction so that the inner hole is formed. Since the delay of the lock release timing of the side reclining mechanism is eliminated, the processing of the connecting pipe 400 is easy, so that the manufacturing cost can be further reduced.

In the second embodiment, the disk 240 is provided on the upper arm 210 side.
The disk 240 may be provided on the side. Further, the disk 240 has a substantially triangular shape. However, the disk 240 may have any shape as long as at least one pair of wedge-shaped spaces in opposite directions can be formed between the disk 240 and the inner peripheral surface of the cylindrical portion 230 of the upper arm 210. It is also possible to replace it.

(Other Embodiments) In the above embodiments, the connecting pipes 70 and 400 are machined to form square holes having phase differences at both ends, and the prismatic connecting portions of the shafts are fitted therein. However, the present invention is not limited to this configuration. For example, as shown in FIG. 10, a round hole is formed at an end of the connecting pipe 70, 400, and the center of the connecting pipe 70, 400 is determined by fitting a cylindrical connecting portion of a shaft into the round hole. A hook plate 75 is fixed to both ends of the connecting pipes 70 and 400, and the position of the hook portion 75a is shifted in the rotation direction so that the hook plate 75 has a phase difference, and the hook portion 75a is rotated integrally with the shaft. May be engaged with a member (e.g., one equivalent to a release lever).

The method of processing the connecting pipes 70 and 400 to obtain a square hole having a phase difference at both ends includes a method of processing the square hole itself at a rotated position and providing a phase difference. After forming a square hole without a phase difference, there is a method of twisting the connecting pipes 70 and 400 to plastically deform the square pipe so that the square hole has a phase difference.

As a method of assembling the connecting pipes 70 and 400, the outer and inner reclining mechanisms are set to the same inclination angle, and the connecting pipes 70 and 400 are twisted (within elastic deformation) so that the both ends are elastically deformed. And a method in which the shaft of the inner-side reclining mechanism is rotated in advance, and the connecting pipes 70 and 400 are fitted to the shaft without twisting.

The phase difference is provided between the square holes at both ends of the connecting pipes 70 and 400 by providing a phase difference between the shaft in the outer reclining mechanism and the shaft in the inner reclining mechanism. In the case of the first embodiment, for example, if the purpose is only to provide a phase difference to the shaft, it can also be realized by making the relative positional relationship between the shaft and the cam plate different between the outer and inner reclining mechanisms. However, if you do this,
Common use of the components of the reclining mechanism is impeded.

[0075]

As described above, according to the first aspect of the present invention, the connecting pipe is used to eliminate the delay in the lock release timing of the inner reclining mechanism with respect to the lock release timing of the outer reclining mechanism. In addition, since the outer reclining mechanism and the inner reclining mechanism are configured to be symmetrical with respect to a plane, when used in an automobile having a driver seat and a passenger seat,
The outer reclining mechanism of the driver's seat and the inner reclining mechanism of the passenger seat can have the same structure, and the inner reclining mechanism of the driver's seat and the outer reclining mechanism of the passenger seat can have the same structure. Therefore, the types of the reclining mechanisms used in total on the outer side and inner side of the driver's seat and the passenger's seat are reduced by half, the number of parts is reduced, and the manufacturing cost can be reduced.

According to the second aspect of the present invention, a square hole coaxially fitted with the rotating portions of the outer and inner reclining mechanisms is provided at the connecting portions at both ends of the connecting pipe with a phase difference in the rotating direction. By forming this, the delay of the lock release timing of the inner-side reclining mechanism is eliminated, so that the processing of the connecting pipe is easy and the manufacturing cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an outer reclining mechanism in a driver's seat of a right-hand drive vehicle.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is an exploded perspective view of a main part in FIG.

FIG. 4 is a perspective view of a connecting pipe.

FIG. 5 is an explanatory diagram of a cam hole of a release lever.

FIG. 6 is an exploded perspective view showing a main part of an outer reclining mechanism according to a second embodiment.

FIG. 7 is an exploded perspective view of a cylindrical portion of the upper arm in FIG.

FIG. 8 is a sectional view of a seat provided with the reclining device shown in FIG. 6;

9 is a view in the direction of arrow D in FIG. 6;

FIG. 10 is a diagram showing another configuration example of the connecting pipe.

[Explanation of symbols]

 10,220 Lower arm 20,290 Shaft 30 Ratchet plate (Upper arm) 40 Pole 50 Cam plate 60,280 Release lever 70,400 Connecting pipe 73,74 Square hole 210 Upper arm 230 Cylindrical part 240 Disk 250,251 Roller 253 Spring 260 With nail Disk

Claims (2)

[Claims] A reclining mechanism is disposed on an outer side and an inner side of a seat, a release lever for an unlocking operation is provided on the outer side reclining mechanism, and a rotating pipe of the outer side reclining mechanism is connected to a rotating portion of the inner side via a connecting pipe. In a reclining device that connects a rotating part of a side reclining mechanism and interlocks the outer reclining mechanism and the inner reclining mechanism, the outer reclining mechanism and the inner reclining mechanism are configured to be plane-symmetric, and The rotating portion of the inner-side reclining mechanism is rotationally displaced relative to the rotating portion of the outer-side reclining mechanism, and the inner-side reclining with respect to the lock release timing of the outer-side reclining mechanism by the release lever. So as to eliminate a delay in unlocking timing mechanisms, the reclining apparatus is characterized in that to have a phase difference to the connecting portion of both ends of the connecting pipe. 2. A connecting hole at both ends of the connecting pipe is formed with a square hole coaxially fitted with a rotating portion of the outer and inner reclining mechanisms with a phase difference in a rotating direction. The reclining device according to claim 1, wherein