JPH07213366A - Seat reclining device - Google Patents

Abstract

PURPOSE:To provide the seat reclining device corresponding to the change of shapes of the base plates and arms by uniting the lock mechanism part of the device to be usable at either right or left side and improving the intensity of pivotally supporting of a rotation part. CONSTITUTION:The device is provided with a plate 1 connected overlapped to the base plate, upper tooth 4 connected to the arm of the sheet reclining device, lower tooth 5 loaded and unloaded to and from the upper tooth 4, and cam 7 rotating the lower tooth 5 between plates 2 overlapped separated from the plate 1 are rotatably assembled.

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 used in a seat device for a vehicle such as an automobile, and more particularly, to a reclining unit which can accommodate different base plates for different vehicle types.

[0002]

2. Description of the Related Art A seat reclining device used for a vehicle seat is an indispensable device for an automobile in order to ensure a comfortable posture and an optimal driving posture of a passenger.

In this seat reclining device, an upper part for connecting an arm for fixing to a seat back is pivotally supported via a hinge shaft to a base plate for fixing to a seat cushion of a seat.

Tooth parts are formed on a circumference of a predetermined radius centering on the hinge shaft in the upper part, and a lower tooth having a tooth part meshing with the tooth part and a cam for engaging and disengaging the lower tooth are formed on the base plate. A lock mechanism is rotatably supported, and an operation lever for rotating the cam is also supported coaxially with the cam to form a lock mechanism.

Furthermore, the arm is constantly biased by a spiral spring wound around the hinge shaft in the forward tilt direction.

Therefore, the occupant operates the operating lever to separate the tooth portion of the lower tooth from the tooth portion of the upper part, and pushes or bends the seat back with the back of the occupant and pulls by utilizing the force of the spiral spring. Thus, when the operation lever is released at a desired inclination angle, the arm is fixed by the lock mechanism.

As described above, by operating the lock mechanism to change the meshing position between the tooth portion of the lower tooth and the tooth portion of the upper part, an appropriate inclination angle of the seat back can be set arbitrarily.

[0008]

However, the conventional seat reclining device is a hinge shaft in which the upper part tooth, the lower tooth meshing with the tooth part of the upper part tooth, and the cam for rotating the lower tooth are fixed to the base plate in a cantilever manner. Since the seat reclining device is adopted as a pair on the left and right of the vehicle seat because it is rotatably pivoted with a pin or a pin, the configuration must be symmetrical, and therefore the left and right are manufactured separately as a pair. It had to be done, and the cost increased.

That is, when the operation lever is arranged on the seat reclining device on the left side of the vehicle seat, the seat reclining device on the right side of the vehicle seat is not provided with the operation lever and a rotating member (cam lever) is arranged instead of the operation lever. It is configured to work together. This is because the rotation member of the seat reclining device on the right side, which should be configured to interlock with the operation lever, moves in the opposite direction to the lock mechanism on the left side.

Further, the seat reclining device is usually different depending on the vehicle type, and the shape of the base plate is a short one fixed to a part of the side surface of the seat cushion, and the long side member extending over the entire side surface of the seat cushion. In some cases, the side bracket also functions as a bracket and is mounted on the seat slide mechanism to form a part of the seat slide mechanism.

On the other hand, the arm is influenced by the structure of the seat back, and the arm may have a rib formed by pressing, or may be formed of a thick single plate, and thus may have various shapes. is there.

By the way, even if the seat reclining device has the same operating angle of the arms and does not basically change in structure, if the base plate and the arms have different shapes, they are different base plates and arms. It is customary to not be able to use the existing production line for this reason and to provide a new production line.

Therefore, the seat reclining device having different kinds of base plates and arms is inevitably required to have an increase in manufacturing cost as compared with a certain standard seat reclining device.

Therefore, according to the present invention, by unitizing the locking mechanism of the seat reclining device, the seat reclining device can be shared in a left-right symmetrical arrangement, and different types of base plates and arms can be simply, quickly and easily manufactured on the same manufacturing line. It is intended to do so.

[0015]

To achieve the above object, a reclining device according to the present invention has an upper part which constitutes a locking mechanism of a seat reclining device, and a tooth portion which meshes with a tooth portion of the upper part. A lower tooth and a cam that engages and disengages with the lower tooth,
A reclining unit was rotatably sandwiched between two plates.

[0016]

[Function] By changing one side of the plate to the base plate or the other side to the base plate, the plates can be shared symmetrically. The same type or different types of base plates or arms can be used. It can be produced easily, quickly and easily on the production line.

[0017]

Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 4, the holder plates 1 and 2 as two plates having symmetrical shapes are provided.
The upper tooth 4 is rotatably supported via the shaft portion 3, and the lower tooth 5 having the tooth portion 5a meshing with the arc-shaped tooth portion 4a of the upper portion 4 is rotatable by the stepped pin 6. A cam 7 for pivotally supporting the lower tooth 5 is pivotally biased by a return spring 8 and pivotally supported by a stepped pin 9.

That is, the upper part stopper 4, the lower tooth 5 and the cam 7 which constitute the lock mechanism are sandwiched between the holder plates 1 and 2, and further, the stepped pins 6 and 9 are arranged at a portion forming a triangle. They are integrated by the attached pin 10 and are formed as an independent reclining unit 11. The upper part 4 has a connecting hole 4c for connecting the arm 31 to be fixed to the seat back.

The return spring 8 is mounted between the engaging portions 1a and 2a of the holder plates 1 and 2 and the cam 7. The locking portions 1a and 2a are offset from the surfaces of the holder plates 1 and 2 (see FIG. 2). As a result, the holder plates 1 and 2 can be prevented from peeling off, and there is an effect that the stepped pin 6 does not have to be caulked and joined to the holder plates 1 and 2. Contrary to this, if the stepped pin 6 is caulked and joined to the holder plates 1 and 2, locking portions 1a and 2a of one of the holder plates 1 and 2 are provided, and one end of the return spring 8 is locked to it. With sufficient effect.

As shown in FIGS. 2 to 4, both ends of the stepped pins 6, 9 and 10 respectively project outward from the holder plates 1 and 2, and these projecting portions are seated. It is used to connect the reclining unit 11 to the base plate by inserting the caulking process into the hole formed in the base plate 30 to be fixed to the cushion.

For example, when the projecting portions of the stepped pins 6, 9 and 10 projecting to the holder plate 1 side are connected to the base plate to be arranged on the right side of the auxiliary seat of the automobile, the seat reclining device on the inner side is formed. Further, the outer side seat reclining device can be formed by connecting the protruding portions of the stepped pins 6, 9, 10 protruding to the holder plate 2 side to the base plate to be arranged on the left side.

Here, as shown in FIG. 3, the shaft portion 3 is provided with a through hole 13 of the hinge shaft 12 at a position where the hinge shaft 12 should be located on the sides of the holder plates 1 and 2 facing each other. The columnar protrusions 14 are formed by the embossing described above, and these columnar protrusions 14 are formed by abutting each other. A shaft hole 4b of an upper part 4 is fitted in the shaft portion 3.

Therefore, on the outer surfaces of the holder plates 1 and 2 which do not face each other, the cylindrical protrusions 14 are formed, respectively.
The recessed surface 15 is formed, and the projections 16 are formed on the recessed surface 15 in the radial direction around the through hole 13 at regular intervals in the circumferential direction. The ridge 16 has an inclined surface 17 which is inclined toward the through hole 13 side, but this is for convenience in molding and does not matter in shape.

The hinge shaft 1 is provided in the through hole 13.
2 is inserted, the head 12 of this hinge shaft 12
Notches 18 or recesses into which the protrusions 16 are fitted are formed on the back surface of a at regular intervals in the circumferential direction. Notch 18
Are formed in a radial direction from the axial center of the hinge shaft 12 corresponding to the protrusions 16 and at predetermined intervals in the circumferential direction of the head portion 12a. The hinge shaft 12 has a spiral spring 60.
A slit 12b that locks the inner end of the is formed.

Therefore, the hinge shaft 12 is inserted through the through hole 13.
And the recessed portion or cutout portion 18 of the head portion 12a is inserted into the ridge portion 1
6 and then the hinge shaft 12 is caulked to the holder plates 1 and 2, and the head 12a
The back surface of the contacting the concave surface 15, the hinge shaft 12 is planted orthogonally to the holder plates 1 and 2,
The cutout portion 18 of the head portion 12a engages with the ridge portion 16 to form a rotation stopper for the hinge shaft 12.

The holder plates 1 and 2 are not limited to forming only the shaft portion 3 of the upper part 4, and
As shown in FIGS. 7 to 10, the holder plates 1, 2
Alternatively, the lower teeth 5 and the shaft portions 3a and 3b of the cam 7 may be formed. The shaft portions 3a and 3b are columnar protrusions 14 formed by embossing similarly to the shaft portion 3, and a through hole 19 is formed at the center thereof. A stepped pin 20 is inserted into the through hole 19, and the stepped pin 20 is caulked to fasten the holder plates 1 and 2.

Therefore, the reclining unit 11 is used.
Explaining the seat reclining device using
As shown in FIG. 11, the stepped pins 6, 9 and 10 are inserted into the through holes of the base plate 30 formed corresponding to the stepped pins 6, 9 and 10 of the reclining unit 11, and caulking is performed. Then, the reclining unit 11 and the base plate 30 are connected. Further, the receding unit 11 and the arm 31 are connected to each other by inserting the pin 32 through the through hole formed in the arm 31 corresponding to the connecting hole 4c of the upper part 4 and caulking.

The hinge shaft 12 is fitted in the shaft hole of the operation lever 33, and the operation lever 33 is arranged parallel to the holder plate 1 and is rotatably supported. The cam lever 34 has a three-pronged shape, is rotatably supported by the stepped pin 9, and is connected by a pin 35 to a long hole formed in the operation lever 33. The cam lever 34 is connected to the cam 7 by a pin 36 so as to rotate integrally. Furthermore, the cam lever 3
4 is formed with a locking portion 34a for connecting one end of the interlocking wire 37. The interlocking wire 37 forms a pair with the base plate 30 and the base plate 40 on the opposite side.
Reclining unit 1 connected and fixed to (FIG. 12)
The first cam 7 is interlocked.

Therefore, in FIG. 12, a substantially inverted L-shaped cam lever 34a is fitted to the stepped pin 9 of the cam 7 of the reclining unit 11 and pivotally supported so that the cam lever 34a and the cam 7 can rotate. Are connected by a pin 36a. A wire end connected to the other end of the interlocking wire 37 is locked and connected to the cam lever 34a by a pin 35a.

A back lever 50 is integrally formed with the operation lever 33 in FIG. 11 so that a seat occupant of the rear seat of a two-door type vehicle can push down the seat back of the front seat when getting on and off. The lever 50 may be projected to the rear seat side.

Further, since a walk-in function for unlocking the seat slide mechanism is provided in association with the frontward rotation of the seat back, the walk-in lever 51 is fitted to the hinge shaft 12 so that the seat shaft can be rotated. It is also possible to pivotally support and connect one end of the interlocking wire that interlocks with the lock mechanism of the seat slide mechanism to the locking end portion 53 of the walk-in lever 51.

The slit 12 of the hinge shaft 12
The inner end of the spiral spring 60 (FIG. 13) is locked and connected to b, and the outer end of the spiral spring 60 is locked and connected to the pin 32 that connects the arm 31 and the upper part 4 with each other. , The arm 31 always applies a biasing force for rotating the arm 31 to the front side. Thus, the seat reclining device is formed.

Since the hinge shaft 12 does not directly support the upper part 4 and has a function of merely locking the inner end of the spiral spring 60, the hinge shaft 12 is welded or firmly fixed to the plates 1 and 2. Since it is not necessary, the hinge shaft 12 only needs to have a supporting force for the spiral spring 60.

The operation of the above embodiment will be described below.
For the reclining adjustment, when the operation lever 33 is rotated upward about the hinge shaft 12, the cam lever 3 is rotated.
4 rotates counterclockwise in the figure around the stepped pin 9 against the force of the return spring 8, whereby the cam 7
Rotate integrally with each other, and the permanent contact portion 5b with the lower tooth 5 (see FIG. 1).
(Refer to FIG. 1) and moves toward the bending portion 5c (see FIG. 1).

Therefore, the lower tooth 5 rotates in the clockwise direction in the figure around the stepped pin 6 or the shaft portion 3b, and the tooth portion 5a thereof is disengaged from the tooth portion 4a of the upper portion 4, so that the upper portion 4 and the arm 31. Rotates integrally with the hinge shaft 12 toward the front side by the force of the spiral spring 60.

When the operation lever 33 is rotated, the cam lever 34 is rotated and the interlocking wire 37 is moved to the right in the figure, and the cam lever 34a on the base plate 40 side is turned around the stepped pin 9 or the shaft portion 3b. The lock mechanism on the base plate 40 side is released by rotating the lock mechanism clockwise. Therefore, the base plates 30, 40
The lock mechanism of works together.

Therefore, the seat back is pushed to the rear seat side to have an appropriate inclination angle, and at that stage, the operation lever 33
When is released, the cam 7 is rotated clockwise around the stepped pin 9 or the shaft portion 3b by the force of the return spring 8 to move from the curved portion 5c of the lower tooth 5 to the permanent contact portion 5b.

Therefore, the teeth 5a, 4a mesh with each other to lock the upper part 4 to maintain the inclination angle of the arm 31, and the cam 7 and the cam lever 34 rotate integrally, whereby the operating lever 33 is rotated. Returns to its original state. Further, the cam levers 34, 41 return to their original states, the interlocking wire 37 moves to the left in the drawing, and returns to their original state.

When the walk-in function is operated, the operation wire 33 is rotated upward, or the back lever 50 is stepped down and pushed down.
At 7, the cams 7 of the base plates 30 and 40 are interlocked and rotated to disengage the lower tooth 5 from the upper part 4 and the arm 31 is tilted forward by the force of the spiral spring 60.

Then, the end portion 5 of the walk-in lever 51 is
2 engages with the pin 32 and rotates counterclockwise to pull the interlocking wire, and the lock mechanism of the seat slide mechanism is released.

Still another embodiment will be described with reference to FIGS. 14 and 15. This embodiment differs from the above-mentioned embodiments in the structure of the lower tooth 5 pivoting. That is, in the above embodiment, the lower tooth 5 is axially supported by the stepped pin 6 located on the upper side of the holder plates 1 and 2 (FIGS. 1 and 7).
However, in this embodiment, the lower tooth 5 is pivotally supported by the stepped pin 6 or the shaft portion 3a located on the lower side of the holder plates 1 and 2.

Therefore, in this embodiment, the lower tooth 5 rotates counterclockwise around the stepped pin 6 to release the meshing of the tooth portions 5a and 4a.
May be rotated clockwise around the stepped pin 9. This is the same as the rotation when the operation lever 33a is operated.

Therefore, in the above embodiment, the cam lever 3
4 (see FIG. 11) needs to be interposed between the lever 4 and the operating lever 33, but in this embodiment, the cam pin 34 is not required and the stepped pin 9 is operated as shown in FIG. While pivotally supporting the lever 33a,
The pin 35a protruding from the operation lever is inserted into the hole 7a formed in the cam 7 so that the cam 7 and the operation lever 33a rotate integrally. Therefore, there is an effect that the cam lever 34 can be omitted and the number of parts can be reduced.

Further, since the holder plates 1 and 2 have different shapes from the above-described embodiment and the position of the stepped pin 6 is different, the through hole 6a is formed in a position substantially triangular with the stepped pins 6 and 9 (see FIG. 14) is drilled to form a stepped pin 60 (FIG. 15).
Since the number is increased, the stepped pins 6, 9 and 60 can be connected to the base plate 30 at three points, which has the effect of improving the connection strength.

[0045]

According to the present invention described above, the seat reclining device can be shared between the right and left by fixing one of the two plates holding the lock mechanism in contact with the base plate.

Further, not only can the right and left sides be shared, but the locking mechanism can be shared between different types of seat reclining devices having different base plate shapes.

Further, since any one of the pins protruding from the two plates can be selected and connected to the base plate, the seat reclining device can be simply, quickly and easily manufactured without using any other connecting tool.

Therefore, the seat reclining device having only the shapes of the arm and the base plate can be manufactured in various kinds in a small amount without providing a special manufacturing line, and an increase in manufacturing cost can be suppressed.

Since the cylindrical protrusions formed on the plate are butted against each other to form the shaft portion of the lock mechanism, the shaft support strength is improved and the engagement between the tooth portions of the upper parts and the lower teeth is improved.

The hinge shaft does not form the shaft portion of the upper part, and therefore has only the function of locking the inner end portion of the spiral spring, and therefore does not need to be welded or firmly fixed to the plate.

Further, since the lock mechanism is sandwiched between the two plates, the engaging portion of the return spring that is elastically mounted between the cam and the plate is formed by a part of the two plates to form the two plates. A tightening force can be applied, and therefore, it is possible to omit forming the shaft portion arranged in the vicinity of the locking portion by caulking the pin.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

3 is a sectional side view of FIG.

FIG. 4 is a partial cross-sectional view of FIG.

FIG. 5 is a front view of the hinge shaft head.

6 is an exploded perspective view of FIG.

FIG. 7 is a front view showing another example of the present invention.

FIG. 8 is a partial cross-sectional view of FIG.

9 is a partial cross-sectional view of FIG.

10 is a partial cross-sectional view of FIG.

FIG. 11 is a front view of a seat reclining device showing an application example of the present invention.

FIG. 12 is a front view of a seat reclining device showing an application example of the present invention.

FIG. 13 is an exploded perspective view of a main part of FIG.

FIG. 14 is a front view (A) and an exploded perspective view (B) showing still another embodiment of the present invention.

15 is a front view (A) and a partial cross-sectional view (B) showing an application example of FIG.

[Explanation of symbols]

 1, 2 ... Holder plate 3, 3a, 3b ... Shaft part 4 ... Upper parts 4a, 5a ... Tooth part 4c ... Connection hole 5 ... Lower tooth 6,9, 10 ... Stepped pin 7 ... Cam 8 ... Return spring 11 ... Reclining unit 12 ... Hinge shafts 13, 19 ... Through hole 14 ... Cylindrical protrusion 15 ... Recessed surface 16 ... Ridge portion 18 ... Notch 30, 40 ... Base plate 31 ... Arm 33 ... Operation lever 34 ... Cam lever 35, 36 ... pin

Claims (9)

[Claims] 1. A pair of plates rotate an upper part tooth that constitutes a lock mechanism of a seat reclining device, a lower tooth having a tooth portion that meshes with a tooth portion of the upper part tooth, and a cam that engages and disengages with the lower tooth member. A seat reclining device characterized by being movably clamped to form a reclining unit. 2. An upper part which constitutes a locking mechanism of a seat reclining device, a lower tooth having a tooth portion which meshes with a tooth portion of the upper part tooth, and a cam which engages and disengages with the lower tooth are rotated by two plates. A seat reclining unit which is movably sandwiched, and at least one or all of respective shaft portions is a reclining unit formed by abutting cylindrical protrusions formed on the two plates. apparatus. 3. The cylindrical protrusion has an axial through hole,
The hinge plate or the pin is inserted into the through hole, and both ends are fixed so as to project outward from the two plates, respectively, and the two plates are fastened together. Seat reclining device. 4. The seat reclining device according to claim 2, wherein the cylindrical protrusion is formed by embossing. 5. A recessed surface formed on the base of the cylindrical projection is provided with ridges in a radial direction centered on the through hole at predetermined intervals in the circumferential direction, and on the back surface of the head of the hinge shaft. The seat reclining device according to claim 2, 3 or 4, wherein notches or recesses for fitting the protrusions are formed at predetermined intervals in the circumferential direction. 6. An upper part which is connected to an arm of a seat reclining device and constitutes a lock mechanism between a plate which is overlapped and connected to a base plate and a plate which is spaced apart from the plate and a tooth portion of the upper part. A seat reclining device comprising: a lower tooth having a meshing tooth portion; and a cam that engages and disengages with the lower tooth so as to be rotatable. 7. A return spring is elastically mounted between the cam and the engaging portion formed at the mating ends of the two plates. Alternatively, the seat reclining device according to item 6. 8. The seat reclining device according to claim 1, wherein an operating lever which rotates integrally with the cam is coaxially and rotatably assembled. 9. A cam lever engaged with the cam is rotatably supported coaxially, and an operation lever engaged with the cam lever is rotatably supported on the hinge shaft. The seat reclining device according to 1, 2, 3, 4, 5, 6 or 7.