JP3516745B2 - Seat reclining device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reclining device capable of arbitrarily adjusting and setting a swing angle (reclining angle) of a seat back with respect to a seat cushion by locking and unlocking.

[0002]

2. Description of the Related Art For example, a seat which supports a seat back so as to be swingable in a front-rear direction with respect to a seat cushion, and which is capable of arbitrarily adjusting and setting an inclination angle (reclining angle) of the seat back under locking and unlocking. Reclining devices are provided in various seats for automobiles and the like.

As a reclining device, for example, a structure generally provided with a lock gear that rotates around a hinge, which is a swing center of a seat back, and a stopper having a tooth portion that can mesh with a tooth portion of the lock gear is generally known. Has been. In such a structure, the lock gear is provided so as to be rotatable integrally with the seat back around the hinge, and the stopper, which is interlocked with the operating means such as the operating lever, is operated under the biasing force of the lock spring. It is possible to mesh with.

Such a reclining device is usually
It is provided at one end or both ends of the seat.

[0005]

By the way, in a seat with a reclining device, a return spring is normally provided for biasing the seat back forward when the reclining device is unlocked. As the return spring, for example, a spiral spring wound around a hinge is used.

In addition, in the known reclining device, in addition to the return spring, the lock gear is arranged around the hinge of the seat back, and the stopper and the lock spring are arranged around the lock gear. The protrusion of the hinge portion of the seat back is unavoidable, which may lead to an overall increase in the size of the seat in the width direction.

Increasing the size of the seat in the width direction due to the protrusion of the reclining device is not preferable for a vehicle seat or the like which is to be arranged in a narrow space.

Therefore, for example, a structure provided with a combination of a rack-shaped longitudinal lock gear whose one end is coupled to an arm or the like on the seat back side by a coupling pin and a stopper having a tooth portion which can be meshed with the longitudinal lock gear is specially provided. fair
No. 02-020246 and the like. With such a configuration, the reclining device can be arranged in a space below the seat cushion, so that the protrusion of the side portion of the hinge portion of the seat back or the like is prevented and the seat can be arranged in a narrow space. It will be possible.

Normally, in response to the linear movement of the longitudinal lock gear, the arm on the seat back side moves in an arc shape around the hinge of the seat back. Therefore, in a reclining device having such a longitudinal lock gear,
By making the connecting hole of the longitudinal lock gear an elongated hole orthogonal to the longitudinal direction and moving the connecting pin in the elongated hole, it is possible to ensure the displacement of the movement loci of the longitudinal lock gear and the arm on the seat back side.

However, in such a structure, since the connecting hole of the longitudinal lock gear is formed as an elongated hole, the wall width around the connecting hole is narrowed, so that the strength of the rear end portion of the longitudinal lock gear is likely to decrease. Since the long hole-shaped connecting hole is bored orthogonally to the longitudinal direction, the cost of the reclining device itself is inevitably increased by increasing the size of the longitudinal lock gear and adding a step of boring the long hole. .

Further, in a reclining device having a longitudinal lock gear, the longitudinal lock gear is usually slidable only within the effective range of the tooth portion with respect to the stopper. It is restricted within the reclining range corresponding to the sitting posture. That is, in the known configuration, since the seat back cannot be tilted forward with respect to the seat cushion, the seat cannot be mounted on the hinged seat that requires the seat back to be tilted, and the mountable seat is limited.

An object of the present invention is to provide a seat reclining device capable of sliding the longitudinal lock gear in synchronization with the swing of the seat back while ensuring the deviation of the locus without providing an elongated hole in the longitudinal lock gear. There is.

Another object of the present invention is to provide a seat reclining device capable of tilting the seat back forward without sliding the longitudinal lock gear.

[0014]

In order to achieve this object, according to the present invention, a mounting bolt , which is a stepped bolt , to which a nut is screwed, is separated from the front-rear direction.
If it is installed on the base bracket at two places,
Moni, this is loosely inserted in the bolt step of the respective mounting bolts, of the corresponding take with <br/> only holes provided in the seat cushion side, in either one of the corresponding circular holes, also remain Other mounting holes extend vertically around the round hole.
Bill arcuate long holes are formed respectively.

[0015]

In this structure, the reclining device itself moves to the longitudinal lock gear due to the movement of the other mounting bolts within the elongated hole centering on the mounting bolt loosely inserted in the round hole.
Since both of them are vertically swung following the swing of the seat back, the sliding of the longitudinal lock gear following the swing of the seat back can be smoothly obtained without making the connecting hole of the longitudinal lock gear an elongated hole. .

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the first aspect of the present invention is as follows.
The seat reclining device 10 according to the embodiment has a pair of linear longitudinal lock gears 12 slidable in the longitudinal direction and tooth portions 14a, 15a capable of meshing with the tooth portions 12a-1, 12a-2 of the longitudinal lock gears. And stoppers 14 and 15 of. As can be seen from FIG. 3 in addition to FIG. 1, a longitudinal lock gear including a pair of base brackets 18 and cover brackets 20.
The reclining device 10 is unitized in advance as one unit body by sandwiching the 12 and the pair of stoppers 14 and 15.

As shown in FIGS. 1 to 3, the pair of stoppers 14 and 15 are formed, for example, as upper and lower latches rotatable around the support pin 24 of the base bracket 18, respectively, and corresponding teeth. Teeth to parts 12a-1, 12a-2
Sliding of the longitudinal lock gear 12 can be regulated, that is, lockable, by sandwiching 14a and 15a from above and below while engaging with each other.

Upper and lower latches (stoppers) 14, 1
5 is linked to the latch guide 30 by free insertion of the projecting pin 26 into the corresponding elongated hole-shaped guide holes 28-1 and 28-2.

As can be seen from FIGS. 1 and 3, the latch guide 30 is formed integrally with, for example, a support shaft 32, and is supported on the side of the cover bracket between the base bracket 18 and the cover bracket 20. It is rotatably arranged with its shaft protruding. Further, for example, the operating means 34 including an operating lever is provided rotatably integrally with the support shaft 32 of the latch guide.

The guide holes 28-1 and 28-2 of the latch guide
Under the rotation of the latch guide 30 in the counterclockwise direction in FIG. 2, the latches 14 and 15 are engaged with the tooth portions 12a-1 and 12a-2 of the longitudinal lock gear.
The teeth 14a and 15a are inclined so as to rotate in the direction in which the teeth 14a and 15a move away from each other, that is, in the unlocking direction (FIG.
reference).

As shown in FIGS. 1 and 2, the latch guide 30 is provided with a tooth 14a of the latch to the tooth portions 12a-1 and 12a-2 of the longitudinal lock gear under the biasing force of the lock spring 36. , 15a are biased in the meshing direction, that is, in the clockwise direction in the figure. As the lock spring 36, for example, a locking piece of the latch guide 30
A tension coil spring stretched between 30a and the locking piece 20a of the cover bracket 20 can be used.

For example, from the initial state shown in FIG. 2, when the operating lever (operating means) 34 is operated in the counterclockwise direction against the biasing force of the lock spring 36, the latch guide 30 is rotated in accordance with the rotation thereof. , Upper and lower latches 14, 15
Rotate in the direction in which the tooth portions 14a, 15a separate from the corresponding tooth portions 12a-1, 12a-2 of the longitudinal lock gear, respectively, and the longitudinal lock gear is unlocked, as shown in FIG.

When the operating force of the operating lever 34 is released at any position of the longitudinal lock gear 12, the latch guide 30 rotates clockwise together with the operating lever under the biasing force of the lock spring 36. Due to the rotation of the upper and lower latches 14 and 15 associated with the above, the tooth portions 14a and 15a mesh with the tooth portions 12a-1 and 12a-2 of the longitudinal lock gear, as shown in FIG. Locked again.

As can be seen from FIG. 5, such a reclining device 10 is attached to a side bracket 40 on a side portion of the seat cushion 38, and a rear end portion of the longitudinal lock gear 12 is arranged in a front-back direction about a hinge 41. The arm 44 of the seat back 42, which can be swung freely, is attached to the connecting pin to the connecting hole 12b.
It is rotatably connected by inserting 46 (see FIG. 2).

As shown in FIGS. 1 and 3, the reclining device 10 normally uses two mounting bolts 48-1 and 48-2 of the base bracket 18 which is the base of the unit.
By inserting the mounting bolts into the corresponding mounting holes 50-1 and 50-2 of the side bracket 40 and screwing the nuts 52 on the opposite sides of the side bracket, the side bracket 40, that is, the seat cushion 38 is fixed. It is attached.

By the way, since the seat back arm 44 moves on an arc centered on the hinge 41, the longitudinal lock gear 12 tends to move linearly in the longitudinal direction.
A shift of the movement locus occurs between the arm and the longitudinal lock gear. In view of this, in the present invention, the reclining device 10 can be swung in the vertical direction with respect to the seat cushion 38, so that the shift of the movement locus between the seat back arm 44 and the longitudinal lock gear 12 can be guaranteed.

As seen from FIG. 6 in addition to FIGS. 1 and 3, in the present invention, the mounting bolts 48-1, 48-2 are attached.
However, the front mounting hole 50-1 is a round hole having a diameter corresponding to the bolt step portion, and the rear mounting hole 50-2 is formed as a stepped bolt having a step portion 48a.
Are formed as arc-shaped elongated holes centered on the front mounting hole 50-1. The front and rear mounting holes 50-1 and 50-2 are each formed to have a diameter that allows loose insertion of the bolt step portion 48a.

Arc-shaped mounting hole of the side bracket 40
50-2 is, for example, the tooth portions 12a-1 and 12a-2 of the longitudinal lock gear.
The reclining device 10 is formed in the reclining range of the seat back 42 corresponding to the effective range of the seat back 42, and within the range of the mounting hole, the reclining device 10 attaches to the side bracket 40, that is, the seat cushion 38, in front of the mounting bolt 48-1.
It is possible to swing up and down around.

For example, it is assumed that the state shown in FIG. 6 is the initial state of the angle of the arm 44 at the reclining front end position of the seat back 42 and the position of the longitudinal lock gear 12. From this initial state, the operation lever 34
When the seat back 42 is tilted rearward by unlocking the longitudinal lock gear 12 associated with the operation of, the rotational force of the arm 44 in the counterclockwise direction centering on the hinge 41 causes the longitudinal lock gear 12 to move upward and forward. Acts on the rear end of 12.

At this time, the reclining device 10 can swing together with the longitudinal lock gear 12 within the range of the mounting hole 50-2 formed of an arc-shaped long hole, so that the seat back 42 is moved as shown in FIG. That is, the arm 44 is tilted according to the swing angle.

As described above, according to the present invention, the reclining device 10 swings and tilts following the swing of the seat back arm 44 with the longitudinal lock gear 12, and therefore, the reclining device 10 and the seat back arm 44 extend longitudinally. The shift of the movement path from the lock gear is guaranteed, and the smooth sliding of the longitudinal lock gear that is interlocked with the swing of the seat back 42 is ensured. That is, unlike the known configuration in which the connecting hole at the rear end of the longitudinal lock gear is a long hole orthogonal to each other in the longitudinal direction, in the present invention, the connecting hole 12b at the rear end of the longitudinal lock gear has the connecting pin 46.
Can be formed as a round hole for loose insertion.

Therefore, without increasing the size of the rear end portion of the longitudinal lock gear 12, a wide wall thickness around the connecting hole 12b can be secured, and the rigidity of the longitudinal lock gear can be maintained high. Further, the cost of the reclining device itself can be surely reduced by downsizing the longitudinal lock gear 12 due to the unnecessary long holes and omitting the step of forming the long holes.

It should be noted that if the seat back is swung forward from the arbitrary rearward tilted position of the seat back 42 shown in FIG. 7 while the longitudinal lock gear 12 is unlocked, the arm around the hinge 41 is the center. Under the rotation of 44, the rear end portion of the longitudinal lock gear 12 follows the swing of the seat back and is pulled rearward while moving downward. In other words, the swing of the reclining device 10 in the counterclockwise direction around the front mounting bolt 48-1 ensures the displacement of the movement path between the arm and the longitudinal lock gear. Also, similar to the above operation, the smooth sliding of the longitudinal lock gear 12 that is interlocked with the swing of the seat back 42 can be ensured.

Here, in the embodiment, the front mounting hole 50-1 of the side bracket 44 is formed as a round hole and the rear mounting hole 50-2 is formed as an arc-shaped long hole. Since it suffices to be able to swing around either one of 48-1 and 48-2, conversely, the rear mounting hole 50-2 is a round hole and the front mounting hole 50-1 May be formed in each of the arc-shaped elongated holes.

However, if the rear mounting hole 50-2 is an arc-shaped long hole and is swingable around the front mounting bolt 48-1, the connecting point between the arm 44 and the longitudinal lock gear 12, that is, Since the distance from the connecting pin 46 can be obtained longer than when the rear mounting bolt 48-2 is used as the swing center, the moving range of the mounting bolt in the elongated hole, that is, the swing range of the reclining device 10 is obtained. Becomes smaller. Therefore, if the rear mounting hole 50-2 is a circular arc-shaped long hole, the excessive oscillating of the reclining device 10 due to the suppression of the oscillating range is prevented, so that the deterioration of the operability can be prevented.

In the embodiment, the two mounting bolts 48-1 and 48-2 are arranged in a substantially horizontal position, but it is sufficient if they are separated from each other in the front-rear direction. Instead, for example, the mounting bolts may be arranged at vertically displaced positions.

Further, in the embodiment, the mounting bolts are embodied as two places, but the number is not limited to this because two or more mounting bolts are sufficient, and for example, three or more places separated from the front and rear of the base bracket 18 are used. Alternatively, a mounting bolt may be provided. However, it was separated back and forth 2
Seat cushion side bracket 40
Since the reclining device 10 can be stably attached to the same, and the number of parts and the work process can be prevented from increasing, it is preferable to use two mounting bolts from the viewpoint of workability.

Here, in the above-described first embodiment, the connecting hole 12b of the longitudinal lock gear 12 is formed as a round hole, and the connecting pin 46 is inserted into the connecting hole, whereby the arm 44 of the seat back and the longitudinal lock gear are separated from each other. Are linked so that they can be linked. However, in the reclining device 110 according to the second embodiment of the present invention shown in FIGS. 8 and 9, the arm 144 and the longitudinal lock gear are engaged under the engagement of the arm side connecting pin 46 and the notch 112b of the longitudinal lock gear. The 112 can be detachably connected.

As can be seen from FIG. 8, in this structure, the arm 144 is formed, for example, by bonding a pair of symmetrical arm pieces 144-1 and 144-2, and between the expanded terminals. A connecting pin 46 is installed and fixed.

As shown in FIGS. 8 and 9, in the reclining device 110, for example, the hook 56 for preventing the connecting pin 46 from coming off from the opening of the notch 112b located on the upper surface of the longitudinal lock gear 112 is provided with the notch. Is provided so as to be engageable with the connecting pin at a position where the opening of the is closed. Hook 56
For example, a pivot pin 58 is pivotally attached to the rear end of the longitudinal lock gear 112 at a corresponding location.

The hook 56 is biased in the engagement direction with the connecting pin 46 under the biasing force of the return spring 60. As the return spring 60, for example, a torsion spring wound around the pivot pin 58, one end 60a of which is locked to the back surface 56a of the hook and the other end 60b of which is locked to the locking hole 62 of the longitudinal lock gear, can be used.

Here, in the embodiment, the return spring
The terminal 60b of 60 is configured to function as a stopper that prevents and restricts excessive rotation of the hook 56 under the biasing force of the return spring. With such a configuration, it is not necessary to provide a dedicated stopper at the rear end portion of the longitudinal lock gear 112, etc., so that it is possible to prevent an increase in the number of parts and a complicated configuration.

As can be seen from FIG. 9,
In this reclining device 110, the oblong mounting hole 50-2 of the side bracket is formed, for example, longer below the position corresponding to the front end of the reclining range of the seat back 42. That is, the reclining device 110 can swing further below the reclining range of the seat back 42.

Further, as shown in FIGS. 8 and 9, for example, a biasing support member 64 for supporting the longitudinal lock gear 112 so as to be capable of being biased upward is capable of supporting the rear end portion of the longitudinal lock gear from below, and the side bracket 40. Is stuck to. As the biasing support member 64, for example, a leaf spring curved in a predetermined shape can be used, which is elastically supported under an upward biasing force and is capable of holding the longitudinal lock gear 112 in the initial state shown in FIG. Has been done.

Also in this reclining device 110, the longitudinal lock gear 112 is formed to have a pair of tooth portions 112a-1 and 112a-2, as in the above embodiment, and the upper and lower latches 14 and 15 are formed. The longitudinal lock gear can be locked under the engagement of the corresponding tooth portions 14a and 15a. Then, the longitudinal lock gear 112, the upper and lower latches 14, 1
Since the configuration and operation of 5 are the same, detailed description thereof will be omitted here.

Now, paying attention to the fact that the support shaft 32 of the latch guide is located substantially coaxially with the rear mounting bolt 48-2, in this reclining device 110, the base 34a of the operating lever is pushed down. It is used as an operation piece for.

For example, the longitudinal lock gear 112 shown in FIG.
, The connecting state of the arms 144 is assumed to be the initial state of the reclining device 110. From this initial state, when the return spring 60 of the hook 56 and the base portion 34a of the operation lever 34 are pushed down against the biasing force of the bias support member 64, the reclining device 110, together with the longitudinal lock gear 112, attaches to the front mounting bolt 48-. Swing counterclockwise around 1.

Then, the rear end of the longitudinal lock gear 112 is
Since the arm descends with respect to the connecting pin 46 of the arm within the range of the attachment hole 150-2, the connecting pin is separated from the notch 112a through the opening as shown in FIG.

In this disengaged state, since the hook 56 is only locked to the upper part of the locking pin 46 of the arm, the hook 56 is moved rearward as the seat back 42 is pressed forward. The locking pin disengages from the hook, and the connection between the arm 144 and the longitudinal lock gear 112 is released. In other words, by swinging the rear end portion of the longitudinal lock gear 112 downward, the seat back without sliding of the longitudinal lock gear 112
42 forward moves are possible.

Further, when the hook 46 of the arm is disengaged from the notch 112a of the longitudinal lock gear when the seat back 42 is tilted forward, and when the downward pushing force of the operation lever 34 is released, the hook 56 causes the return spring 60 to move. And the longitudinal lock gear 112 is returned to the initial state under the biasing force of the biasing support member 64 (see FIG. 11).

As can be seen by looking at FIG. 11 in addition to FIG. 8, in the present invention, the rear end surface 66 of the longitudinal lock gear 112 and the corresponding end surface 68 of the hook 56 are connected by the connecting pin.
Each is formed as an opposing tapered surface capable of ensuring the entry of 46. In such a configuration, the connecting pin 46 moves the longitudinal lock gear 112 and the taper surface 6 of the hook 56 when the seat back 42 is moved from the forward tilted position.
When they come into contact with 6, 68, the longitudinal lock gear and the hook are expanded under the movement along the respective surfaces, and the entry of the connecting pin into the notch 112b is guaranteed. Then, when the connecting pin 46 is aligned with the notch 112b of the longitudinal lock gear, the arm 144 and the longitudinal lock gear 122 are rejoined under the engagement of the notch and the hook 56 (see FIG. 9).

That is, in this structure, the connection between the arm 144 and the longitudinal lock gear 112 associated with the raising of the seat back 42 can be automatically performed without the operation of the operation lever 34 and the like. Workability at the time of connection is improved.

According to the seat reclining device 110 having such a structure, since the seat back 42 can be mounted on the hinged seat which can be tilted forward, the range of use of the reclining device having the longitudinal lock gear 112 is expanded. It Further, since the reclining device 110 can be attached to the hinged seat as well, the hinged seat can be easily attached to a narrow space of an automobile or the like by preventing the side portion from projecting and preventing the size from increasing.

Here, in the embodiment, the longitudinal lock gear 112 and the arm 144 can be released from the connection by pushing down the reclining device 110 by the base portion 34a of the operating lever, but the invention is not limited to this, and the lower end is opened, for example. The notch 112b is provided at the rear end of the longitudinal lock gear, and the hook 56 is provided so as to be engageable with the connecting pin 46 of the arm from the opening side of the notch so that the longitudinal lock gear and the arm are disconnected by pulling up the reclining device. It may be configured to be possible.

However, compared with pulling up, pushing down is easier for the seated person to operate, and a sufficient operating force can be applied to the operating lever 34 without changing the sitting posture. If the longitudinal lock gear 112 and the arm 144 can be disconnected by pushing down the operation lever, the reclining device 11 with excellent operability can be obtained.
0 can be easily secured.

Further, in the embodiment, the operating lever 34 is exemplified as the operating means, but the operating lever 34 is not limited to the operating lever, as long as it can be rotated and pushed down, it is not limited to the operating lever. The operation handle or the like may be provided integrally with the latch guide 30 as the operation means.

Further, in the embodiment, the bias support member 64
Is exemplified as a leaf spring curved in a predetermined shape, but is not limited to a leaf spring, as long as it can apply an upward biasing force to the rear end portion of the longitudinal lock gear 112, it is not limited to a leaf coil, for example. The bias support member may be formed from another spring member such as a spring or a tension coil spring.

However, if the biasing support member 64 is formed of a leaf spring, other constituent members are unnecessary, and it is sufficient if the biasing support member 64 is bent into a predetermined shape and directly fixed to the side bracket 40. Can be simplified.

Although the present invention is most suitable as a seat reclining device for automobiles, the present invention is not limited to this, and for example, as a seat reclining device for various seats such as trains, airplanes, ships and households. The present invention can be applied.

The above-mentioned embodiments are for explaining the present invention and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0062]

As described above, according to the seat reclining device of the present invention, the reclining device itself swings and tilts in accordance with the swing of the seat back.
Since the displacement of the movement trajectory between the seatback arm and the longitudinal lock gear is guaranteed, the connecting hole at the rear end of the longitudinal lock gear can be formed as a round hole. Therefore, the rigidity of the longitudinal lock gear can be maintained high, and the cost of the reclining device itself can be surely reduced by downsizing the longitudinal lock gear and eliminating the process of drilling the oblong hole due to the elimination of the oblong hole.

If the longitudinal lock gear and the arm are detachably connected by the engagement of the notch and the connecting pin, the seat back without sliding of the longitudinal lock gear under the disengagement of the connecting pin from the notch. The reclining device can be attached to a hinged seat that allows the seat back to be tilted forward. Therefore, the range of use of the reclining device having the longitudinal lock gear is expanded.

Further, if the connection between the arm and the longitudinal lock gear can be released by the moving operation against the biasing force of the bias support member and the biasing force of the return spring of the hook by the operating means, the arm and the longitudinal lock gear can be released. Since the operation piece for releasing the connection between the parts can be omitted, the number of parts can be reduced and the configuration can be simplified.

Furthermore, if the connection between the arm and the longitudinal lock gear can be released by pushing down the operating means, the pushing down is easier for the seated person to operate than the pulling up, and the sitting posture is not changed. Since a sufficient operating force can be applied to the operating means, a reclining device with excellent operability can be easily secured.

If the rear end surface of the longitudinal lock gear and the corresponding end surface of the hook are formed as opposed taper surfaces, respectively, the longitudinal lock gear and the hook are moved under the movement of the connecting pin when the seat back is pulled up from the forward tilted position. Since the connection pin is expanded to ensure the entry of the connecting pin into the notch, automatic engagement can be obtained without operating the operating means. Therefore, workability at the time of reconnection between the arm and the longitudinal lock gear is improved.

Further, if the biasing support member is formed of a leaf spring curved in a predetermined shape, a constituent member for imparting a biasing force is unnecessary, and if it is directly fixed to the side bracket, it is sufficient. Can certainly be simplified.

Further, if the mounting bolts are provided at two positions separated from each other on the front and rear of the base bracket, the reclining device can be stably mounted on the side bracket of the seat cushion, and the number of parts and the number of working steps are prevented from increasing. Therefore, workability is improved.

Of the mounting holes of the number corresponding to the mounting bolts, if the frontmost mounting hole is a circular hole and the remaining mounting holes are arc-shaped long holes, the connecting pin between the arm and the longitudinal lock gear is The distance can be obtained longer than when the rear mounting bolt is used as the swing center.
The movement range of the mounting bolt in the long hole, that is, the swing range of the reclining device becomes small. Therefore, if the rear mounting hole is an arc-shaped long hole, it is possible to prevent the operability from being lowered by preventing the reclining device from excessively swinging due to the suppression of the swinging range.

[Brief description of drawings]

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

FIG. 2 is a schematic front view of the inside of the seat reclining device when locked.

FIG. 3 is a schematic vertical sectional view of a seat reclining device,

FIG. 4 is a schematic front view of the inside of the seat reclining device when the lock is released.

FIG. 5 is a schematic side view of the seat with a seat reclining device mounted, partially broken away.

FIG. 6 is a schematic front view of the seat reclining device at the reclining front end position of the seat back.

FIG. 7 is a schematic front view of the seat reclining device when the seat back is tilted after reclining.

FIG. 8 is a schematic exploded perspective view of a seat reclining device according to a second embodiment of the present invention.

FIG. 9 is a view showing the connection between the longitudinal lock gear and the arm,
It is a schematic front view of the seat reclining device of 2nd Example.

FIG. 10 is a schematic front view of the seat reclining device of the second embodiment when the connecting pin is detached from the notch.

FIG. 11 is a schematic front view of the seat reclining device of the second embodiment when the connection between the longitudinal lock gear and the arm is released.

[Explanation of symbols]

10, 110 Seat reclining device 12, 112 Longitudinal lock gears 12a-1, 12a-2, 112a-1, 112a-2 Longitudinal lock gear teeth 12b Connection hole 112b Notches 14, 15 Pair of stoppers (upper, lower 14a, 15a Stopper (latch) teeth 18 Base bracket 20 Cover bracket 28-1, 28-2 Guide hole 30 Latch guide 34 Operation means (operation lever) 34a Operation means base 38 Seat cushion 40 Side bracket 41 Seat back hinge 42 Seat back 44, 144 Arm 46 Connecting pin 48-1, 48-2 Mounting bolt (stepped bolt) 48a Bolt step 50-1, 150-1 Mounting hole (round hole) 50-2, 150 -2 Mounting hole (arc-shaped long hole) 52 Nut 56 Hook 58 Pivot pin 60 Return spring (torsion spring) 64 Bias support member (leaf spring) 66 Rear end face (tapered face) of the longitudinal lock gear 68 Corresponding end face of hook ( (Tapered surface)

Claims (8)

(57) [Claims] 1. An arm having a seat back swing center.
The rear end is connected to the lower end of the
The base bracket and cover bracket.
The length of each bracket
A linear longitudinal lock gear supported for linear sliding in the hand direction ; a pair of base brackets and a cover
It is rotatably arranged between brackets, and each bracket
The sliding of the longitudinal lock gear against the
From the facing position for the teeth formed on each side edge
As a unit body having a combination of a pair of upper and lower stoppers that can be regulated under engagement,
It is unitized in advance under the sandwiching by the racket,
To the corresponding mounting holes provided in the cushions side, projecting base bracket, predetermined number of mounting board
Of the mounting bolt after inserting the
By screwing the nut on the wing against a reclining device for a seat to be attached as one unit body against the seat cushion side, it is screwed nuts, mounting bolts consisting stepped bolt, away in the longitudinal direction At least 2 places
It is projected on the bracket and each of these mounting
Seat cushion side where the bolt step of the seat is loosely inserted
Of corresponding mounting holes provided in, any one of the corresponding circular holes, also an arcuate long hole remaining other mounting hole extending in the vertical direction around the circular hole, respectively formed By moving the other mounting bolts in the long hole centering on the mounting bolt loosely inserted in the round hole, the longitudinal lock gear, together with the unit body , swings up and down following the swing of the seat back. A seat reclining device characterized by the fact that it is possible. 2. An arm having a seat back swing center.
The rear end is connected to the lower end of the
The base bracket and cover bracket.
The length of each bracket
A linear longitudinal lock gear supported for linear sliding in the hand direction ; a pair of base brackets and a cover
It is rotatably arranged between brackets, and each bracket
The sliding of the longitudinal lock gear against the
From the facing position for the teeth formed on each side edge
As a unit body having a combination of a pair of upper and lower stoppers that can be regulated under engagement,
It is unitized in advance under the sandwiching by the racket,
To the corresponding mounting holes provided in the cushions side, projecting base bracket, predetermined number of mounting board
Of the mounting bolt after inserting the
By screwing the nut on the wing against a reclining device for a seat to be attached as one unit body against the seat cushion side, it is screwed nuts, mounting bolts consisting stepped bolt, away in the longitudinal direction At least 2 places
It is projected on the bracket and each of these mounting
Seat cushion side where the bolt step of the seat is loosely inserted
Of corresponding mounting holes provided in, any one of the corresponding circular holes, also an arcuate long hole remaining other mounting hole extending in the vertical direction around the circular hole, respectively formed By moving the other mounting bolts in the long hole centering on the mounting bolt loosely inserted in the round hole, the longitudinal lock gear, together with the unit body , swings up and down following the swing of the seat back. possible and then, the upper end, from the opening defined in one of the lower end, a
A notch that allows attachment and detachment of the connecting pin provided in the arm is provided at the rear end of the longitudinal lock gear, and the opening side of the notch is inserted into this notch under the biasing force of the return spring .
The hook that engages with the connecting pin of is attached rotatably to the corresponding position of the longitudinal lock gear.
The rear end of the
It is biased and supported by the holding member in the engaging direction of the notch with respect to the connecting pin , and by the forcible swinging of the entire unit body against the biasing force of the biasing support member and the biasing force of the hook return spring .
Of the connecting pin of the arm from the notch of the longitudinal lock gear.
Allows disengagement and connects pin from this notch
The seat reclining device is characterized in that the longitudinal lock gear and the arms are disengaged to release the connection, whereby the seat back can be tilted forward without the longitudinal lock gear sliding. 3. A source of rotation against a biasing force of a lock spring.
Use to rotate the pair of stoppers in the unlocking direction.
The operating means can rotate integrally with the spindle of the latch guide
The latch support shaft is provided coaxially with the mounting bolt loosely inserted in the arc-shaped elongated hole, and the base of the operating means at which the shaft is located is the biasing force of the biasing support member. And by moving in the corresponding direction up or down against the biasing force of the return spring of the hook ,
Is it a notch associated with the overall movement of the unit body ?
The seat reclining device according to claim 2, wherein the connection between the arm and the longitudinal lock gear can be released by detaching the connecting pin . 4. The notch of the longitudinal lock gear is formed with an opening on the upper surface, and the connection between the arm and the longitudinal lock gear can be released by pushing down the operating means.
Or the seat reclining device described in 3. 5. The rear end face of the longitudinal lock gear and the corresponding end face of the hook are brought into contact with the connecting pin of the arm in each pair.
5. The seat reclining device according to claim 2, wherein the reclining device is formed as opposed taper surfaces that can be expanded against a biasing force. 6. biasing support member for applying a biasing force in the direction of engagement with-out the connecting pin and the notch of the arm to the rear end of the longitudinal lock gear, when Ru is formed from a leaf spring which is curved into a predetermined shape
Both can support the rear end of the longitudinal lock gear from below.
The seat reclining device according to any one of claims 2 to 5, which is fixed to a side portion of the seat cushion . 7. The seat reclining device according to claim 1, wherein the mounting bolts are provided at two positions separated from each other in the front and rear of the base bracket. 8. The mounting hole in the forefront of the mounting holes corresponding to the mounting bolts is a round hole, and the remaining mounting holes in the rearward are circular arc-shaped elongated holes. Seat reclining device.