JPS6320362Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reclining device for a front seat in a passenger car, particularly a two-door sedan type car.

To get into and out of the rear seat of a two-door sedan, the passenger folds the seat back of the front seat forward. For this reason, the front seat of a two-door sedan type car is provided with a seatback reclining angle adjustment mechanism and a seatback forward folding mechanism. It is desirable that the forward folding mechanism be equipped with a mechanism that can fold the seat back forward without changing the preset inclination angle of the seat back and return the seat back to its original setting position. Various mechanisms have been proposed. has been done.

However, in a reclining seat equipped with each of the above-mentioned mechanisms, the reclining angle adjustment mechanism is operated to tilt the seat back to the final reclined position (full recline) as shown by the solid line A in Figure 1, and the forward folding mechanism is operated in that state. Then, the seat bag automatically stands up to a substantially normal use position as shown by the chain line B in the figure by the action of the spring in the forward folding mechanism. Since the seat back is not fixed in this upright position, if you sit in this state and start the car, there is a risk that the seat back will unexpectedly fall to its final reclined position due to the weight applied to the seat back.

The purpose of this proposal is to solve the above-mentioned problem with the seatback when starting the vehicle, and includes a regulating means that allows the seatback forward folding mechanism to be operated only when the seatback inclination angle is within the normal range of use. , is provided between the forward folding mechanism and the seat cushion to achieve the above object.

The structure of the present device will be explained below with reference to the drawings.
A pair of brackets 2 and 3 are rotatably connected to each other by a shaft 1. One bracket 2 is fixed to a side surface of a seat cushion 4, and the other bracket 3 is fixed to a side surface of a seat bag 5.

A sector gear 6 having teeth 6A and a recess 6B on its circumference is rotatably supported on a shaft 1 between brackets 2 and 3. A lever 7 for adjusting the reclining angle is attached to the outside of the brackets 2 and 3, and a lever 7 for adjusting the reclining angle is attached to the shaft 1 as a pivot point.A lock claw 8 that engages and disengages from the sector gear 6 is operated via a cam plate 9 and a cam 10 is configured to do so.

The lever 7 and the cam plate 9 overlap on their side surfaces and are engaged with each other through a long hole 11 and a pin 12. The cam plate 9 and the cam 10 are integrally supported by a shaft 13 so as to be rotatable. The lock pawl 8 is swingably supported at one end by a shaft 14, and the lock pawl 8 and the cam plate 9 are engaged with each other through a pin 15 and an elongated hole 16. The cam 10 normally comes into contact with the back of the lock pawl 8 to maintain the engagement of the lock pawl 8 with the sector gear 6.

There is a sub-bracket 17 between the bracket 3 on the seat back side and the lever 7, and the shafts 13 and 14
Both ends of the bracket are fixed to the brackets 2 and 17. The shaft 1 passes through the brackets 2 and 17 on the front and back sides, and is fixed to the seat cushion side bracket 2. That is, the lock pawl 8, cam plate 9, cam 10, etc. that constitute the reclining angle adjustment mechanism are held between the brackets 2 and 17. A relief hole 18 is provided in the sub-bracket 17 to allow movement of the engagement pin 12 of the lever 7 and the lock pawl 8.

A lever 19 for operating the forward folding mechanism is attached to the seat back side bracket 3 with a shaft 20, and a locking lever 22 is supported on the same bracket 3 with a shaft 21.
and are connected via link members 23, 24, and 25.

One end of the locking lever 22 comes into contact with the front wall 6B1 of the recess 6B of the sector gear 6, and the lever 22
A tension coil spring 26 provided between the other end and the bracket 3 maintains the locking action of the lever 22 on the sector gear 6.

Also, the pin 27 implanted in the seat back side bracket 3 is inserted into the rear wall 6B2 of the recess 6B of the sector gear 6.
The lock lever 2 against the front wall 6B1
2 contacts the seat back side bracket 3
and the sector gear 6 is fixed in relative position.

The sub-bracket 17 is provided with an arc-shaped elongated hole 28 centered on the shaft 1, and a pin 29 at the tip of the locking lever 22 is loosely fitted into the elongated hole 28.

The length of the elongated hole 28 is within a range that allows movement of the seat bag 5 from the forward folding position to the last tilted position, and the width is such that in the range α of the seat bag 5 from the normally used tilt angle to the forward fold position, the lever for operating the forward folding mechanism 19, that is, a wide width that allows the locking lever 22 to swing, and a narrow width that makes it impossible to swing the locking lever 22 in the range β from the normal use tilt angle of the seat back 5 to the final tilt. has been done.

A tension coil spring 30 is provided between the reclining angle adjusting lever 7 and the sub-bracket 17 for keeping the reclining angle adjusting mechanism including the lever 7 in an inoperative state.

A spiral ring 32 is provided whose inner end is engaged with the shaft 1 and whose outer end is engaged with the protrusion 31 of the seat back bracket 3, so that the seat back 5 is always urged forward.

Further, on the surface opposite to the forward biasing spring 32, a spiral spring 34 is provided, the inner end of which is engaged with the shaft 1, and the outer end of which is engaged with a pin 33 implanted in the sector gear 6. It is biased counterclockwise.

Next, to explain the operation, FIGS. 2 and 3 show the state in which the reclining angle adjustment mechanisms 7 to 16 and the forward folding mechanisms 19 to 27 are not operating, and the lock pawl 8 is engaged with the tooth portion 6A of the sector gear 6. The relative position of the seat cushion side bracket 2 and the sector gear 6 is fixed. Furthermore, the locking lever 22 and the pin 27 abut on the front and rear walls 6B1 and 6B2 of the recess 6B of the sector gear 6, respectively, so that the relative position of the seat back side bracket 3 and the sector gear 6 is fixed. In other words, the seat back 5 via the sector gear 6
The angle of inclination is fixed.

If you sit in this state and operate the reclining angle adjusting lever 7 clockwise in the figure against the spring 30, the cam plate 9 and the cam 10 rotates counterclockwise around the shaft 13. Then,
The contact between the cam 10 and the lock pawl 8 is released, and the pin 15 of the lock pawl 8 is guided by the elongated hole 16 of the cam plate 9, so that the lock pawl 8 is aligned with the shaft 14.
The sector gear 6 swings counterclockwise around , and the sector gear 6 is disengaged.

When the sector gear 6 is released as described above, the sector gear 6 and the seat bag 5 are integrated through the bracket 3, and since the bracket 3 tends to tilt forward due to the spiral spring 32, push the seat bag 5 with your back. Alternatively, if the user lifts his/her back and selects the inclination angle of the seat bag 5 to a desired angle, and then releases the lever 7 in this state, the lever 7 returns to its original position by the action of the spring 30. Then, the lock pawl 8 swings clockwise via the cam plate 9 and cam 10 and engages with the sector gear 6, so that the inclination angle of the seat back 5 is fixed.

When the forward folding mechanism operation lever 19 is operated counterclockwise with the seat back 5 adjusted within the range of the normal use inclination angle α as described above, the locking lever is moved through the link members 23 to 25. 2
2 is rotated clockwise around the shaft 21 against the spring 26, and is removed from the side wall 6B1 of the recess 6B of the sector gear 6.

Then, the fixation of the relative position between the seatback side bracket 3 and the sector gear 6 is released, and the spiral spring 32 causes the bracket 3, that is, the seatback side 5
falls forward. The forward tilting angle is such that the pin 27 integrated with the bracket 3 moves in the recess 6B of the sector gear 6 and pushes the front wall 6 as shown by the chain line 27' in FIG.
It is regulated by meeting B1.

When the operation of the lever 19 for operating the forward-folding mechanism is stopped, the tip of the locking lever rests on the outer periphery of the sector gear 6, as shown by the chain line 22' in FIG. 3, and the forward-folding mechanism is maintained in the operating state.

When you raise your hand against the spiral spring 32 to tilt the seat bag 5 forward, the pin 27 hits the rear wall 6B2 of the recess 6B, and at the same time, the locking lever 22 moves into the recess 6.
B and is locked to the front wall 6B1, and the relative positions of the seat back bracket 3 and the sector gear 6 are fixed again. That is, the seat bag 5 returns to the inclination angle before being folded forward.

When the reclining angle adjustment lever 7 is operated to tilt the seat bag 5 backward from the normal use tilt angle α, the pin 29 of the locking lever 22 moves into the arc-shaped elongated hole 28 as shown by the chain line 29' in FIG. Move to the narrower width part. Therefore, even if an attempt is made to operate the lever 19 for operating the forward folding mechanism in this state, the pin 29 will be blocked by the elongated hole 28 as described above, and the locking lever 22 will not be able to swing.

That is, when the seat back 5 is tilted rearward as shown by the solid line A in FIG. 1, the forward folding mechanism cannot be operated.

Note that when the reclining angle adjustment lever 7 is operated with the seatback 5 tilted forward, the sector gear 6 is released, and the sector gear 6 is moved by the spiral spring 34.
As a result of this action, the rear wall 6B2 of the recess 6B rotates counterclockwise until it abuts the pin 27' at the position shown by the chain line. Then, the tip of the locking lever 22 that has been riding on the outer periphery of the sector gear 6 enters the recess 6B and is locked to the front wall 6B1, and the relative position between the sector gear 6 and the bracket 3, that is, the seat back 5 is fixed. .

Therefore, although the memory function of the original tilted position of the seatback is lost, if the seatback 5 is raised to the desired tilting angle and the lever 7 is released, the sector gear 6
is fixed, so there is no risk of the seat bag 5 accidentally falling backwards.

As described above, the reclining device of the present invention operates only when the inclination angle of the seat back 5 is within the normal use range α.
A sub-bracket 17 integrated with the seat cushion side bracket 2 serves as a regulating means to enable the operation of the seat cushion.
A long arc-shaped hole 28 centered on the seatback tilting central axis 1 is provided in the seatback, and a locking mechanism is provided in which the seatback is swung by a lever 19 for operating the forward folding mechanism provided on the seatback side to engage and disengage from the recess 6B of the sector gear 6. Lever 22
The upper pin 29 is loosely fitted into the arcuate long hole 28,
The length of the long hole 28 is set within a range that allows movement of the seat back 5 from the forward tilted position to the final tilted position, and the width of the long hole 28 is set within the range α of the seat back 5 from the normally used tilt angle to the forward tilted position. In this case, the width is wide enough to allow the locking lever 22 to swing, and the width is narrow enough to prevent the locking lever 22 from swinging in the range β from the normally used inclination angle of the seat back 5 to the final tilted position. Therefore, when the seat bag 5 is tilted rearward beyond the normal use range α by operating the reclining angle adjustment mechanisms 7 to 16, the arc-shaped elongated hole 28 on the sub-bracket 17 constituting the regulating means, Lever 19 for operating the forward folding mechanism
Due to the engagement with the pin 29 on the locking lever 22 that is linked to the locking lever 22, the forward folding mechanisms 19 to 26 become impossible to operate, and if the car is started without the seat back 5 being fixed, the seat back 5 will suddenly fall significantly backwards. There are no defects.

Further, the above-mentioned regulating means is achieved by forming an elongated hole 28 in the shape and width as described above in the sub-bracket 17, and fitting a pin 29 attached to the locking lever 22, which is a component of the forward-folding mechanism, into the elongated hole 28. Since it can be constructed by

[Brief explanation of the drawing]

Figure 1 is a side view illustrating the operation of an automobile seat with a reclining device, Figure 2 is a front view of the proposed reclining device with the front cover removed, and Figure 3 is a reclining angle adjustment lever, spiral spring, and sub-bracket. FIG. 4 is a cross-sectional plan view taken along the line of FIG. 2. 1 is the shaft, 2 and 3 are the brackets, 4 is the seat cushion, 5 is the seat back, 6 is the sector gear, 6
A is a tooth part, 6B is a recessed part, 7-16 is a reclining angle adjustment mechanism, 17 is a sub-bracket, 19-
26 is a forward folding mechanism, 27 is a pin, 28 and 29 are regulating means, and 32 and 34 are spiral springs.

Claims (1)

[Scope of utility model registration request] A seat back is attached to the seat cushion with a shaft so that its inclination angle can be adjusted, and a sector gear having teeth and a recess on the outer periphery is rotatably supported on the shaft,
In a reclining device that includes a reclining angle adjustment mechanism for the seatback that engages and disengages with the teeth of the sector gear on the seat cushion side, and a seatback forward folding mechanism that engages and disengages the seatback in the recess of the sector gear on the seatback side, the mechanism is integrated with the seat cushion side bracket. The sub-bracket is provided with an arc-shaped elongated hole centered around the seatback tilting center axis, and a locking lever is attached to the top of the locking lever that is swung by a lever for operating the forward-folding mechanism provided on the seatback side to engage and disengage from the recess of the sector gear. The pin is loosely fitted into the arc-shaped long hole, and the length of the long hole is set within a range that allows movement of the seat bag from the forward tilted position to the final tilted position, and the width of the long hole is set within the range that allows the seat bag to move from the forward tilted position to the final tilted position. In the range from the used inclination angle to the forward tilting position, the width is wide enough to allow the locking lever to swing, and in the range from the normal use inclination angle of the seat back to the final tilted position, the locking lever is disabled to swing. A reclining device for automobile seats formed into a narrow width.