JP5597013B2 - Car seat double-sided reclining lock device - Google Patents

Description

  The present invention relates to a double-sided reclining lock device for an automobile seat provided with reclining lock mechanisms for adjusting a tilt angle of a seat back on both sides of the seat.

  As an example of the reclining lock mechanism, a disk-shaped housing and a disk-shaped cover plate with ring-shaped gear teeth provided on the inner surface of the outer peripheral wall are assembled so as to be able to rotate and pass each other, and a plurality of lock gears are installed inside the housing. Assemble with the gear teeth of the cover plate or releasably assemble the cams to displace the lock gears at the center of the lock galley, and set the operating shaft protruding from the cam plate side to the housing and cover plate plate. What is assembled by inserting in the center of the surface is known (Patent Document 1).

  The reclining lock mechanism (hereinafter simply referred to as “lock mechanism”) is fixed to both sides of the seat by fixing the housing and cover plate to the opposite side bracket plate surfaces of the seat back frame and seat cushion frame, respectively. Equipped as an assembled double-sided type.

  The double-sided reclining seat is assembled as a single unit with a connecting shaft that spans and locks both locking mechanisms to the operating shafts of each locking mechanism, and is equipped with an operating lever for unlocking on one operating shaft. The tilt angle of the seat back can be adjusted by releasing the lock by synchronizing both locking mechanisms with a connecting shaft that rotates in a straight line.

  In such a double-sided reclining seat, when a relatively large load is applied to the seat back from the rear side of the vehicle, the lock mechanism may be forcibly unlocked.

  Assuming that the heavy load placed on the rear side of the rear seat collides with the back of the seat back by stopping the vehicle by the brake operation, the load placed on the rear side of the rear seat is placed on the back of the seat back. When a collision occurs, the seat back may be pushed forward and deformed or displaced. Since there is a wheel house or the like on the vehicle body side (out side) of the seat back, it is considered that the luggage may collide with the vehicle inner side (in side) of the seat back.

  When the load collides with the inside of the seat back, the seat back may twist and rotate forward from the shoulder side on the inside of the vehicle. Along with this, the locking mechanism on the inside of the vehicle is integrated and pivoted in the forward direction around the operating shaft, and the locking mechanism on the vehicle body side is also unlocked due to the interlocking rotation of the connecting shaft Will occur.

  Conventionally, as a measure for preventing the lock mechanism from being unlocked due to a load such as a load, when a load is applied from behind the seat back, the connecting portion of one operating shaft and the connecting shaft of the connecting shaft is bent into a dogleg shape. In addition, even if the connecting shaft rotates integrally with one of the lock mechanisms, it has been proposed to prevent the turning force from being transmitted to another lock mechanism (Patent Document 2).

JP 08-253063 A WO 2007/026571 A1

  In the unlocking prevention means of the lock mechanism described above, the connecting portion between one operating shaft and the operating shaft of the connecting shaft is configured to be bent in a dogleg shape toward the front. Therefore, depending on the bending state of the connecting shaft, there is a concern that the seating feeling for the seated person may deteriorate.

  The problem to be solved by the present invention is not caused by deformation of the reclining lock mechanism itself, such as the connecting shaft being bent, and the complicated change of the mechanism is not applied to the inside of the reclining lock mechanism. The countermeasure is to prevent the reclining lock mechanism from being unlocked.

In the invention according to claim 1 of the present application, the reclining lock mechanism is provided on both sides of the seat by assembling between the opposite side brackets of the seat back frame and the seat cushion frame, and both the reclining lock mechanisms are operated by each reclining lock mechanism. Assemble with the connecting shaft that spans the shaft,
In the double-sided reclining lock device for automobile seats, which is configured such that the reclining lock mechanism is synchronized and unlocked by a connecting shaft that rotates in a certain direction by lever operation, and the tilt angle of the seat back is adjustable.
On the vehicle body side, one end of the rotation shaft inserted through the plate surface of the seat side frame is supported by the bearing at the upper end side, and the operation of pulling up from the lower end side around the front of the vehicle around the rotation support shaft. The lever and the operating shaft of the reclining lock mechanism are supported by the lower end, the operating lever provided on the upper end with the protrusion protruding sideways, and the other shaft end coaxial with the rotation support shaft of the operating lever Provided with a lock release mechanism assembled from a bridging lever that holds the bearing on the side, and accepts and holds the protrusion of the operating lever with a vertically long guide hole that opens upward from the lower end side,
Furthermore, the inertial weight of the operating lever is set to be larger than the inertial weight of the integral operating lever and the bridging lever at the rotating support shaft, and the locking hole of the protrusion along the rotational locus centering on the operating shaft of the reclining lock mechanism Is provided on the bridging lever continuously from the lower end of the guide hole to the front in the vehicle,
When a load due to luggage or the like is applied to the back of the seat back, the protrusion of the operating lever is received by the locking hole of the bridging lever due to the quick rotation of the operating lever, and the bridging lever is located above the front of the vehicle from the lower end side. It is characterized in that it is assembled with a lock release prevention mechanism for turning around and preventing the actuating lever from turning downward in the front of the vehicle interior by receiving the projection by the locking hole.

  The invention according to claim 2 of the present application is characterized in that a round bar-shaped guide pin is provided as a protrusion on the upper end side of the operating lever.

  In the invention according to claim 1 of the present application, when a load due to a load or the like is applied to the back portion of the seat back, the inertia weight of the operating lever is set to be larger than the inertia weight of the operation lever and the bridging lever integrated with the rotation support shaft. Therefore, the operating lever rotates faster than the bridging lever. Along with this, the protrusion of the operating lever is received by the locking hole of the bridging lever. The locking lever is unlocked to prevent the bridging lever from turning from the lower end to the upper part in the front of the vehicle and the operating lever from turning in the lower part of the front of the vehicle by receiving the projections by the locking holes. It can prevent turning in the direction. Thereby, the reclining lock mechanism can be kept in the locked state.

In the invention according to claim 1 of the present application, the reclining lock mechanism itself is not deformed such as the connecting shaft is bent, and the reclining due to a collision load such as a load is not applied to the inside of the reclining lock mechanism. It is possible to prevent the lock mechanism from being unlocked.

In the invention according to claim 2 of the present application, since a round bar-shaped guide pin is provided as a protrusion on the upper end side of the operating lever, the guide pin is relatively displaced upward from the guide hole in accordance with a normal lever operation. When the load due to luggage or the like is applied to the back portion of the seat back, the guide pin of the operating lever can be smoothly moved so as to be received by the locking hole of the bridging lever.

FIG. 1 is a perspective view showing a seat back frame of an automobile seat equipped with a double-sided reclining lock device according to the present invention as seen from the rear side. FIG. 2A is a side view schematically showing a lock release mechanism of the reclining lock device provided in the reclining seat of FIG. FIG. 2b is a front view schematically showing the unlocking mechanism of FIG. 2a. FIG. 3 is an explanatory diagram showing the operation of the unlocking mechanism of FIG. 2a by a normal lever operation. FIG. 4 is an explanatory diagram showing the movement of the unlocking mechanism of FIG. 2a accompanying a collision load such as luggage.

  The illustrated embodiment is applied to assembling a lock release prevention mechanism of a reclining lock mechanism due to a load such as a load in a double-sided reclining device equipped on a seat back frame 1 as shown in FIG. The seat back frame 1 is a round pipe member, and is formed in a substantially quadrangular frame shape from the upper frame 1a, the left and right side frames 1b and 1c, and the lower frame 1d.

  Side brackets 3a and 3b opposite to the side brackets 2a and 2b of the seat cushion (not shown) are fixed to the lower side of the left and right side portions of the seat back frame 1. Between the respective side brackets 2a, 3a, 2b, 3b, reclining lock mechanisms (hereinafter simply referred to as “lock mechanisms”) 4a, 4b are assembled and installed. Both lock mechanisms 4a and 4b are integrally assembled by a connecting shaft 5 that is spanned between operating shafts (not shown) of the lock mechanisms 4a and 4b.

  In the seat back frame 1 described above, both the lock mechanisms 4a and 4b are set to be unlocked when the connecting shaft 5 is rotated in the direction of the arrow by lever operation. The lock release prevention mechanism of the lock mechanism by a load such as a load is provided in a lock release mechanism including an operation lever linked to the reclining lock mechanism 4b on the vehicle body side (out side surrounded by a circle).

  As shown in FIG. 2a, the lock release mechanism includes an operation lever 10 that pulls up from the lower end side around the front in the interior of the vehicle, an operation lever 11 that holds the operation shaft 40 of the reclining lock mechanism 4b on the lower end side, and an operation lever. 10 is assembled with a bridging lever 12 that connects the operating lever 11 and 10. The operation lever 10 and the bridging lever 12 are assembled together via a rotating support shaft 13 of both.

  As shown in FIG. 2 b, the operating lever 10 holds the outer shaft end of the rotating shaft 13 inserted through the plate surface of the seat side frame 6 at the upper end side and holds the outer side of the seat side frame 6 downward from the rotating shaft 13. It is arranged outside.

  The actuating lever 11 is disposed on the inner side of the seat side frame 6 so as to rise obliquely upward behind the vehicle from the actuating shaft 40 of the reclining lock mechanism 4b. The operating lever 11 is provided with a projection 14 formed by the bridging lever 12 on the upper end side so as to protrude sideways.

  As the protrusion 14, a guide pin (hereinafter, “protrusion” is referred to as “guide pin”) in a round bar shape is provided. In addition, a part of the bridging lever 12 can be cut and formed. Including this, the protrusion 14 may be integrally formed in a shape other than a round bar shape, or may be attached separately.

  The bridging lever 12 holds the inner shaft end coaxial with the rotation support shaft 13 of the operation lever 10 at the upper end side, and is located inside the seat side frame 6 from the rotation support shaft 13 toward the upper end side of the operation lever 11. Has been placed. The bridging lever 12 is provided with a vertically long guide hole 15 for receiving and holding the guide pin 14 of the operating lever 11 upward from the lower end side. In the guide hole 15, the guide pin 14 of the actuating lever 11 is inserted and assembled near the lower end of the hole.

  In the lock release mechanism, the inertia weight of the operating lever 11 is set to be larger than the inertia weight of the integral operation lever 10 and the bridging lever 12 by the rotation support shaft 13. At the same time, the bridging lever 12 is provided with a locking hole 16 of the guide pin 14 along the rotation locus centering on the operating shaft 40 of the reclining mechanism 4 b so as to continue from the lower end of the guide hole 15 to the front in the vehicle. .

  In addition to the above-described mechanism, the bridging lever 12 is provided with a spring-loaded arm 17 that continues from the bridging lever 12 so as to rise obliquely upward at the rear of the vehicle from the bearing portion of the rotary support shaft 13. A spring end of a return spring 18 that is hung between the spring hook arm 17 and the seat side frame 6 is hooked on the upper end side of the spring hook arm 17.

  The unlocking mechanism of the reclining lock mechanism configured as described above is a normal lever operation, and as shown in FIG. Then, the bridging lever 12 turns integrally with the operation lever 10 from the lower end side to the upper front in the vehicle, and the guide pin 14 is pushed through the guide hole 15 while being relatively displaced upward from the guide hole 15. Along with this, the operation lever 11 turns downward in the forward direction in the vehicle.

  As a result, the connecting shaft 5 is rotated in a certain direction by the operating shaft 40 of the reclining lock mechanism 4b, and the reclining lock mechanisms 4a and 4b are unlocked in synchronization with the connecting shaft 5, thereby adjusting the inclination angle of the seat back. You can After adjusting the tilt angle of the seat back, when the pull-up operation of the operation lever 10 is released, the entire lock release mechanism is returned to the original state by the return spring 18.

  When a load due to luggage or the like is applied to the back of the seat back, the inertia weight of the operation lever 11 is set to be larger than the inertia weight of the integral operation lever 10 and the bridging lever 12 by the rotation support shaft 13. The operating lever 11 rotates faster than the bridging lever. Along with this, the guide pin 14 of the operating lever 11 is received by the locking hole 16 of the bridging lever 12. By receiving the guide pin 14 by the locking hole 16, the bridging lever 12 is turned from the lower end side to the upper front side in the vehicle, and the operation lever 11 is prevented from turning to the lower front side in the vehicle.

  Accordingly, the operation lever 11 can be prevented from turning in the unlocking direction, and the reclining lock mechanisms 4a and 4b can be kept in the locked state.

In this reclining lock device, the lock mechanism 4a, 4b itself is not deformed such that the connecting shaft is bent, and a complicated mechanism change is not applied to the inside of the lock mechanism 4a, 4b. It is possible to take measures to prevent the lock mechanism from being released.

  In addition, since the round bar-shaped guide pin 14 is provided on the upper end side of the operating lever 11 as a projection, the guide pin 15 is displaced upward relative to the guide hole 15 in accordance with a normal lever operation. The guide pin 14 of the operating lever 11 can be smoothly moved so as to be received by the locking hole 16 of the bridging lever 12 when a load due to luggage or the like is applied to the back portion of the seat back. .

DESCRIPTION OF SYMBOLS 1 Seat back frame 2a, 2b Side bracket 3a, 3b Seat back frame side bracket 4a Reclining lock mechanism 4a Car interior side reclining lock mechanism 40 Reclining lock mechanism actuating shaft 5 Connection shaft 10 Operation lever 11 Actuating lever 12 Bridge lever 13 Rotating spindle 14 Protruding part (guide pin)
15 Guide hole 16 Locking hole

Claims (2)

Installed between the opposite side brackets of the seat back frame and seat cushion frame, the reclining lock mechanism is provided on both sides of the seat, and both reclining lock mechanisms are assembled together with a connecting shaft that spans the operating shaft of each reclining lock mechanism. ,
In the double-sided reclining lock device for automobile seats, which is configured such that the reclining lock mechanism is synchronized and unlocked by a connecting shaft that rotates in a certain direction by lever operation, and the tilt angle of the seat back is adjustable.
On the vehicle body side, one end of the rotation shaft inserted through the plate surface of the seat side frame is supported by the bearing at the upper end side, and the operation of pulling up from the lower end side around the front of the vehicle around the rotation support shaft. The lever and the operating shaft of the reclining lock mechanism are supported by the lower end, the operating lever provided on the upper end with the protrusion protruding sideways, and the other shaft end coaxial with the rotation support shaft of the operating lever Provided with a lock release mechanism assembled from a bridging lever that holds the bearing on the side, and accepts and holds the protrusion of the operating lever with a vertically long guide hole that opens upward from the lower end side,
The inertial weight of the operating lever is set to be larger than the inertial weight of the integrated control lever and bridging lever on the rotating support shaft, and the locking holes of the protrusions along the rotation locus centering on the operating shaft of the reclining lock mechanism are guided. Provided to the bridging lever continuously from the lower end of the hole forward in the car,
When a load due to luggage or the like is applied to the back of the seat back, the protrusion of the operating lever is received by the locking hole of the bridging lever due to the quick rotation of the operating lever, and the bridging lever is located above the front of the vehicle from the lower end side. A double-sided reclining of an automobile seat, which is assembled with a lock release prevention mechanism that turns around and prevents the actuating lever from turning around the lower part of the front of the vehicle interior by receiving a projection by a locking hole. Locking device. The double-sided reclining lock device for an automobile seat according to claim 1, wherein a round rod-shaped guide pin is provided as a protrusion on the upper end side of the operating lever.

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