JP2548764Y2 - Seat reclining device - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention relates to a seat reclining device for a vehicle, and in particular, a double-sided lock provided with a latch type seat reclining device on each of the left and right sides of a seat. The present invention relates to a seat reclining device.

(Prior Art) This type of seat reclining device includes an outer side and an inner side base plates fixed to left and right sides of a seat cushion, and arms fixed to left and right sides of a seat back and pivotally mounted on the respective base plates. A lock mechanism comprising an upper part attached to each of the arms, a lower tooth capable of being disengaged with respect to each of the upper parts, and an operating member for operating each of the lower teeth. The operating member is actuated by operating an operation lever pivotally mounted on the base plate. Locking or unlocking of each lower tooth with respect to each upper part is performed, for example, by operating an operation lever of an outer side seat reclining device, thereby interlocking with a locking mechanism of the outer side seat reclining device. Is configured to be performed following.

(Problems to be Solved by the Invention) However, in the above conventional seat reclining device, the outer side and the inner side may be unlocked or the like due to a variation in dimensions of each part of each of the outer and inner side seat reclining devices. There is a case where a phase shift occurs between the outer side and the inner side, so that the unlocking of the outer side and the inner side may not be synchronized with each other, so that the operation feeling of the operation lever may be reduced.

This invention was made in order to solve the above-mentioned problems of the prior art, and an object of the invention is to correct a phase shift at the time of unlocking each of the outer and inner seat reclining devices. It is to provide a reclining device.

[Structure of device]

(Means for Solving the Problems) In order to achieve the above-described object, the present invention provides a method in which an arm is pivotally mounted on each of base plates mounted on the left and right sides of a seat, and each of the upper parts is provided between each of the base plates. A lock mechanism comprising a lower tooth capable of being disengaged from each of the upper teeth and an operating member for operating each of the lower teeth, and operating the operating member by operating an operating lever pivotally mounted on the one base plate. A seat reclining device that enables locking and unlocking of each lower tooth with respect to each of the upper parts, and corresponds to the other end of a connection link that has one end connected to the free end of the operation lever and the operation lever. The free ends of the actuating members are attached to the free ends of the links that are pivotally mounted on the other base plate. An absorbing engagement portion that engages with the end side and synchronizes the operation of each operation member at the time of unlocking is provided.

(Operation) Since the present invention is configured as described above, it is possible to synchronize the unlocking of each seat reclining device by correcting the phase shift at the time of unlocking each seat reclining device. Thereby, the operation feeling of the operation lever can be improved.

(Embodiment) The present invention will be described below based on an embodiment shown in the drawings.

1 to 10 relate to an embodiment of the present invention, FIG. 1 is a schematic perspective explanatory view of a seat reclining device, FIG. 2 is a sectional explanatory view of an outer side seat reclining device, and FIG. FIG. 4 is a side sectional view taken along the line III-III of FIG. 4, FIG. 4 is a sectional view taken along the line IV of FIG.
FIG. (A) is an enlarged explanatory view of a portion A in FIG. 2, FIG. 5 (B) is an explanatory sectional view taken along a line VV in FIG. 3, FIG. 6 is an explanatory sectional view of an inner seat reclining device, FIG. 7 is an explanatory side view taken along the line VII-VII of FIG. 6, FIG. 8 is an explanatory view taken along the line VIII of FIG. 7, FIG. 9 is an explanatory view showing a main part of the outer side seat reclining device, FIG. 10 is an explanatory view showing a main part of the seat reclining device on the inner side.

In the figure, E is a seat reclining device for a vehicle, and each base plate 40 mounted on the left and right sides of the seat.
A and 40B are each provided with an arm 10, and between each base plate 40A and 40B and the arm 10, each upper part 2
0 and lower tooth 3 that can be disengaged with this upper part 20
0 and an operating member 50 for operating the lower tooth 30.On the other hand, the operating member 50 is operated, for example, by operating an operating lever 70 which is axially mounted on the outer base plate 40A, and Locking and unlocking of each lower tooth 30 with respect to 20 is enabled.

This invention is particularly applicable to the other end of the connecting link 71 having one end connected to the free end side of the operating lever 7 and the other end corresponding to the operating lever 70, for example, a link 74 axially attached to the inner base plate 40B. On the free end side of
The long holes 71a, 74a, which are examples of the absorbing engagement portions, which engage with the free end side of the cam 50, which is an example, and synchronize the operation of each cam 50 at the time of unlocking, are provided. .

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

First, the outer side seat reclining device R1
This will be described with reference to FIGS. 5 to 9 and FIG.

A base plate 40A on the outer side is fixed to a side portion of a seat cushion (not shown), and a first pivot 21 fixed to an upper rear portion of the base plate 40A is implanted. An upper tooth 20 having an arcuate tooth portion 20a is mounted on the shaft. An arm 10 fixed to the side of the seat back (not shown) is attached to the upper part 20 by two mounting pins 10a and 10b and a burring 11 protruded from the arm 10. , Wound around the first pivot 21 and both ends of the first pivot 21
The arm is urged in a counterclockwise direction (FIG. 3) by a spiral spring 13 locked to a mounting pin 10a implanted in the arm 10, respectively.

The lower tooth 30 having the tooth part 30a meshing with the tooth part 20a of the upper part 20, as shown in FIG.
It is instructed to be rotatable into the mounting hole 40a of the base plate 40A by the second pivot 32 integrally with the first pivot 31. The diameter of the mounting hole 40a is set slightly larger than the diameter of the second pivot 32. I have. That is, a gap a is set between the mounting hole 40a and the second pivot 32 so that the lower tooth 30 can be rotated by approximately 1/2 tooth of the tooth portion 30a by the gap a. Is configured. Further, as shown in FIG. 2, a convex portion 31a formed on the upper portion of the reinforcing plate 31 has a concave portion formed on the base plate 40A in opposition to the convex portion 31a.
The lower tooth 30 is held in a neutral position by loosely fitting the gap 40 with a gap c in the gap 40c.

The lower tooth 30 has a cam projection 30b and a cam recess 30c formed at the lower edge opposite to the teeth 30a, and the cam constituting the operating member 50 engaged and disengaged with the cam projection 30b and the cam and 30c. 50 is overlapped with the reinforcing plate 31 and integrally rotatably supported by the third pivot 51 in the mounting hole 40b of the base plate 40A. The diameter of the mounting hole 40b is slightly smaller than the diameter of the third pivot 51. It is set large. That is, FIG. 5 (B)
As shown in FIG. 7, a gap b is set between the mounting hole 40b and the third pivot 51. The cam 50 is constantly urged counterclockwise by a tension spring 52.

A pivot 2 is provided outside the arm 10 and the lower tooth 30.
Holder plates 60 respectively fixed to 1, 32, 51 are provided.

In the cam 50, a sub-lever 55 superimposed around the third pivot 51 is fitted into the pin 41 implanted in the cam 50 and is integrally set.

An operating lever 70 for operating the cam 50 is mounted on the second pivot 32 and extends upward as shown in FIG.
One end of a connecting link 71 is pivotally connected to 70a by a pin 72,
The pin 53 implanted in the extension 55b of the sub-lever 55 fits into an elongated hole 71a formed at the other end of the connection link 71. Therefore, the operation lever 70 is the cam 50, the sub lever 55
And the tension spring 52 is always urged to rotate in the counterclockwise direction via the connecting link 71, and the rotation is performed by the stopper 60a formed by cutting and raising the holder plate 60 so that the upper extension 70a Is regulated by abutting. Also, this allows the operating lever 70 to be locked.
The mounting position of the cam 50 can be made constant.
The cam 50 can be released at the same time via the sub lever 55 while absorbing the left and right variations of the lock position.

Note that the operating lever 70 and the base plate 40A near the second pivot 32 are provided with auxiliary springs 73 which are weaker than the spring force of the tension springs 52.
The auxiliary spring 73 always keeps the upper extension 70a of the operating lever 70 in contact with the stopper 60a.

A bent portion 70c is formed on the laterally extending portion 70b of the operation lever 70 as shown in FIG. 4, and the bent portion 70c is brought into contact with a flange portion 40c formed on the base plate 40A. Is set to prevent the operation lever 70 from falling inside.

A base portion 80a of an outer side sub-lever 80A formed in a bell crank shape is axially attached to a mounting portion 40d formed on a base plate 40A near the second pivot 32 by a pin 81, and one free end portion 80b is One end of a wire 90 which is an example of a connecting means with an inner side sub-lever 80B formed in a bell crank shape is locked in the other free end portion 80c by loosely fitting into a locking hole 70d formed in the operation lever 70. Have been.

Next, the inner side seat reclining device R2 will be described with reference to FIG. 1, FIG. 6 to FIG. 8 and FIG.

In the figure, the same or equivalent parts as those on the outer side are denoted by the same reference numerals and described.

A link 74 corresponding to the operation lever 70 on the outer side is pivotally mounted on the inner reclining mechanism R2 by the second pivot 32. As shown in FIG. 10, a long hole 74a is formed at one free end of the link 74.
A pin 54 fixed to a sub-lever 56 integrally set with the cam 50 is loosely fitted. Inner side sub lever 80B
The base 80d is mounted on a mounting portion 40e formed on the base plate 40B near the second pivot 32 by a pin 82. One free end 80e of the base 80d is provided with a locking hole 7 formed on the link 74.
4b, the other end of the wire 90 is locked to the other free end 80f.

Other configurations are the same as those of the outer-side reclining mechanism R1.

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

9 and 10 show a state in which the outer side and inner side seat reclining devices R1 and R2 are locked, and the cam projection 30b of the lower tooth 30 is provided with a cam 50.
Are pressed against each other by a tension spring 52, whereby the teeth 30a of the lower tooth 30 mesh with the upper teeth 20 and the teeth 20a.

In order to tilt the seat back from this locked state,
To release the lock, the operation lever 70 is rotated clockwise about the second pivot 32 as shown by the imaginary line in FIG. Then, the cam 50 rotates clockwise about the third pivot 51 against the spring force of the tension spring 52 via the connecting link 71 and the sub-lever 55 to rotate the cam recess 30 of the lower tooth 30.
When the lower tooth 30 reaches the position opposing c, the lower tooth 30 rotates counterclockwise by its own weight, and the concave portion 30c engages with the cam 50. As a result, the upper tooth 20 and the lower tooth 30
The teeth 20a, 30a of the first arm are disengaged, and the arm 10 is moved to the first pivot 2
The spiral spring 13 rotates counterclockwise around 1 with the spring force of the spiral spring 13.

At this time, the sub-lever 80A connected to the operation lever 70
Is rotated counterclockwise about the pin 81 in FIG. 4, so that the wire 90 connected to the sub-lever 80A is
The link 74 is rotated counterclockwise via the sub-lever 80B of the inner reclining mechanism R2. As a result, the cam 50 is rotated clockwise against the spring force of the tension spring 52, and the meshing of the teeth 30a, 30a of the upper tooth 20 and the lower tooth 30 is released similarly to the outer side.

After the outer and inner seat reclining devices R1 and R2 are unlocked by operating the operation lever 70 in this manner, the seat back is fixed at a desired position by the occupant, and when the operation lever 70 is released, the operation is started. The lever 70 returns to the position shown by the solid line in FIG. 3 via the cam 50, the sub-lever 55, and the connection link 71 by the spring force of the tension spring 52. At this time, the cam 50 rotates counterclockwise about the third pivot 51, and pushes up the cam projection 30b of the lower tooth 30 to rotate the lower tooth 30 clockwise, so that the tooth portions 20a, 30a Are engaged with each other, whereby the outer-side seat reclining device R1 is locked.

On the other hand, the seat reclining device R2 on the inner side
The outer sub-lever 80A rotates clockwise about the pin 81 in FIG. 4 and releases the wire 90, so that the urging force of the tension spring 52 rotates the cam 50 counterclockwise about the third pivot 51. Then, the reclining mechanism R2 on the inner side is locked as in the outer side.

Here, in the outer-side seat reclining device R1, the connecting link is rotated in accordance with the clockwise rotation of the operation lever 70.
When the 71 moves and the left end of the long hole 71a contacts the pin 53, the sub-lever 55 and the cam 50 rotate to unlock.

On the other hand, in the seat reclining device R on the inner side, the link 74 rotates counterclockwise in conjunction with the operation lever 70 on the outer side, and the sub-lever 56 and the cam 50 are moved by the long hole 74a abutting on the pin 54. The inner side is unlocked by rotating. Therefore, the phase shift at the time of unlocking the outer side and the inner side due to variations in the engagement position of the cam 50 with the cam projection 30b of the lower tooth 30, the mounting position of the second pivot 32, etc.
The correction can be made by the cooperative action of the pin 74a and the pins 53 and 54, and the outer side and the inner side can be unlocked in synchronization.

[Effect of the invention]

As described above, according to the present invention, the unlocking of each seat reclining device can be synchronized by correcting the phase shift at the time of unlocking each seat reclining device. Thereby, the operation feeling of the operation lever can be improved.

[Brief description of the drawings]

1 to 10 relate to an embodiment of the present invention, FIG. 1 is a schematic perspective explanatory view of a seat reclining device, FIG. 2 is a sectional explanatory view of an outer side seat reclining device,
3 is an explanatory side view taken along the line III-III of FIG. 2, FIG. 4 is an explanatory cross-sectional view taken along the line IV of FIG. 3, and FIG. Part A is an enlarged explanatory view, and FIG.
FIG. 6 is a cross-sectional explanatory view taken along the line VV of FIG. 6, FIG. 6 is a cross-sectional explanatory view of the inner side seat reclining device, and FIG.
FIG. 8 is a side view as viewed in the direction of the arrows VII-VII, FIG. 8 is an explanatory view as viewed in the direction of the arrow VIII in FIG. 7, FIG. 9 is an explanatory view showing the main parts of the outer side seat reclining device, and FIG. FIG. 2 is an explanatory diagram illustrating a main part of the device. E: Seat reclining device R1: Outer seat reclining device R2: Inner seat reclining device 10: Arm 10a: Mounting hole 10b: Convex portion 20: Upholstery 20a: Tooth portion 20b: Concave portion 23 Damper 30 Lower tooth 30a Tooth 31 Reinforcement plate 31a Convex 33 Damper 40A Outer base plate 40B Inner base plate 40a Mounting hole 50 Operating member ( Cam) 53, 54 Pin 70 Operating lever 71 Connecting link 71a Absorbing engaging part (long hole) 74 Link 74a Absorbing engaging part (long hole) 80A Outer side sub lever 80B …… Inner side sub lever 90 …… Connection means (wire)

Claims (1)

(57) [Scope of request for utility model registration] An arm is pivotally mounted on each of the base plates mounted on the left and right sides of the seat, and each upper part is disposed between each base plate and the arm, and a lower tooth detachable from each of the upper parts is provided. A lock mechanism including an operating member for operating each lower tooth is provided, and by operating an operation lever pivotally mounted on the one base plate, the operating member is operated to lock and unlock each lower tooth with respect to each of the upper parts. The other end side of a connection link, one end of which is connected and pivoted to the free end side of the operation lever, and the free end side of a link pivotally mounted on the other base plate corresponding to the operation lever. To engage with the free end side of each of the operating members, and actuate each of the operating members when unlocking. A seat reclining device, wherein a synchronizing absorption engagement portion is provided.