JP2008285114A - Actuator for raising seat back - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an actuator for raising a seat back capable of performing raising operation of the fallen seat back by electric operation using one motor. <P>SOLUTION: The actuator for raising the seat back comprises a case body 2 mounted to a vehicle, a main gear 6 provided in the case body 2, a turning arm L to which a terminal of an inner cable 8 for raising the seat back is fixed, and hollow bodies C1, C2 which are fixed to the case body 2 and to which the inner cable 8 is inserted. Rotating torque of the electric motor is transmitted to the main gear 6 via a speed reducing mechanism, and a long hole engaged with a pin T provided in the eccentric position of the main gear 6 is provided on the turning arm L. A terminal of an outer casing 7 to which the inner cable 8 is slidably inserted is fixed to a remote end of the hollow bodies C1, C2, and comprises a fixation part 7a and a movable part to which the inner cable 8 is slidably inserted. An energizing means for energizing the movable part on the remote end side of the hollow bodies C1, C2 is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seat back raising actuator. More specifically, the present invention relates to a seat back triggering actuator that electrically operates a seat back that has fallen after the reclining release of the seat back of the vehicle seat by a single motor.

  The invention described in Patent Document 1 is a power seat adjustment capable of realizing a total of eight ways of adjustment of the front and rear positions of the seat, the respective vertical positions at the front and rear positions, and the angle adjustment of the seat back of the seat with a single forward / reverse motor. It is an object of the present invention to provide a device and a power seat adjusting device having a simple structure of a motor power transmission mechanism.

  In Patent Document 1, a single motor that can rotate in both forward and reverse directions, a driving-side rotating body that rotates in response to the rotation of the motor, and the driving-side rotating body are connected to the driving-side rotating body. An input-side clutch member that rotates together with the body, and an output-side clutch member that can be intermittently connected to the input-side clutch member. A clutch mechanism for intermittently rotating the motor is described.

  On the other hand, an object of the invention described in Patent Document 2 is to provide a seat with a walk-in mechanism that performs an accurate automatic operation corresponding to the state of the seat at that time by one operation switch installed in the vicinity of the driver.

  Patent Document 2 discloses a detection switch that detects the position of the seat back, and is electrically connected to the operation switch and the detection switch, and is based on an output signal of the detection switch when the operation switch is turned on. And a control device that determines and controls whether the automatic operation device should perform automatic operation of the walk-in mechanism or automatic return operation of the seat.

  According to the invention described in Patent Document 2, the control device determines the current seat state based on a signal from a detection switch that detects the seat back position, and activates the walk-in mechanism when the seat is in the return position. When the walk-in mechanism is in the operating state, the actuator of the automatic operation device is operated to operate the seat return.

  The invention described in Patent Document 3 has a problem (purpose) to reduce malfunction of the walk-in device, and in order to solve such a problem, the first switch installed on the inner wall surface of the vehicle and the first switch include A motor that operates when energized, and a movable member that is connected to a cam that rotates following the operation of the motor, and that operates the release means by the rotation of the cam. A walk-in device having a second switch that energizes the motor to operate when the switch is energized, the cam rotates by the operation of the motor, and the motor rotates when the cam rotates a predetermined amount is described. ing.

  That is, the walk-in device described in Patent Document 3 includes a “walk-in mechanism” that is installed in a vehicle seat and that allows the seat back to tilt, and a “control device” that controls the walk-in mechanism. Then, the release member of the walk-in mechanism is operated by the movable member of the control device, and the seat back of the vehicle seat on which the walk-in mechanism is installed is tilted.

  In the control device, when the first switch installed on any one of the inner wall surfaces is energized, the motor is started and the cam is rotated. When the cam rotates, the second switch is energized, and the motor is continuously operated to rotate the cam regardless of whether the first switch is energized. When the cam rotates, the movable member connected to the cam operates the release means of the walk-in mechanism to tilt the seat back of the vehicle seat on which the walk-in mechanism is installed. .

  The invention described in Patent Document 4 has an object (object) to provide a seat back raising device that can raise a fallen seat back by operating a switch in the vicinity of the opening at the rear of the vehicle body. Therefore, an output vehicle that can be rotated by an electric device in a seat cushion on the free hinge side of the seat back, a reduction gear that can rotate only in one direction via a one-way clutch bearing to the output vehicle, and the reduction gear A coaxial, another reduction gear that rotates integrally with the shaft, and a sector gear that meshes with the reduction gear are pivotally supported, and a wire end is connected to the sector gear. The other end of the end is connected to a lever that can be rotated together with the seat back. The seat back can be brought from the lying down state to the standing state by pulling the yaw to the sector gear side, while the wire is pulled to the lever side by manually pushing down the seat back and the sector gear is rotated in reverse by the one-way clutch bearing. Therefore, it is possible to return to the original state.

  In the invention described in Patent Document 4, when the electric device is driven, the sector gear is rotated forward via the output wheel and the reduction gear, and the seat back is erected by the wire being pulled toward the seat cushion side. When the standing seat back is manually laid down, the wire is pulled to the seat back side, the sector gear rotates backward, and the original state is restored.

  A geared motor is provided in a power seat provided with two types of seating posture control devices, a seat slide device and a reclining device. The seat slide device and the reclining device are each formed with a corresponding drive mechanism, In addition, it is also known that the second joint shaft is connected to the drive mechanism of each device via a torque cable (see, for example, Patent Document 5).

Japanese Patent Laid-Open No. 8-188073 JP-A-5-58208 JP 2003-31326 A JP 2001-239862 A Japanese Utility Model Publication No. 6-47753

  As disclosed in Patent Documents 1 to 5, although an actuator for performing reclining lock release of a vehicle seat (front-back of a seat back) electrically using a motor and a control cable is already known, There is no actuator with a simple configuration that uses a single motor to electrically lift the seat back reclining lock and to raise the seat back after the reclining is released. In addition, the structure is complicated. In the seat back raising mechanism disclosed in Patent Document 4, the operation amount from the lock position to the release position of the lock device in which one end of the wire is locked differs depending on the dimensional variation of the component parts. For this reason, if the operation amount increases, it is possible to avoid the problem that the lock cannot be released due to a shortage of the operation amount if the operation amount of the wire is set to be large in advance, but the operation amount is small. In this case, even if the unlocking is completed, the wire is further operated (especially, when the operation causing the seat back is performed, when the locking device reaches the locked position, the wire cannot be moved further). There is a problem that a load is applied to the wire, causing malfunction due to the elongation of the wire and damage to the wire end.

  Therefore, according to the present invention, the unlocking operation can be completed when the operation amount is small with a simpler structure that can be electrically operated using a single motor until the seatback that has fallen after the reclining is released is operated. However, there is no need to operate the control cable further, the control cable is not loaded, and the actuator that causes the seat back does not cause malfunction due to the extension of the inner cable or damage to the inner cable terminal member. The purpose is to provide.

The seat back raising actuator of the present invention comprises: (a) a housing attached to a vehicle;
(B) a main gear rotatably provided in the housing;
(C) a swivel arm provided in the case so as to be turnable, and having a terminal of the inner cable for raising the seat back fixed thereto;
(D) a hollow body fixed to the casing and having the inner cable introduced into the inner space thereof;
(E) The rotational torque output by the electric motor is transmitted to the main gear via the speed reduction mechanism,
(F) The swivel arm is provided with a long hole that engages with a pin provided at an eccentric position of the main gear,
(G) An end of an outer casing through which the inner cable is slidably inserted is fixed to a distal end of the hollow body,
(H) A terminal of the outer casing is provided with a fixed part, a movable part that is separable from the fixed part and is movable in the space of the hollow body, and the inner cable is slidably inserted therethrough. Consists of
(I) It is characterized by comprising urging means for urging the movable part toward the distal end side of the hollow body.

  According to the present invention, even if the unlocking is completed when the operation amount is small and the operation of causing the seat back that has fallen after the reclining is released is electrically performed using a single motor and the operation amount is small, the It is possible to provide an actuator that causes a seat back that does not operate the control cable, does not apply a load to the control cable, and does not cause malfunction due to extension of the inner cable or damage to the inner cable terminal member. .

  The seat back trigger actuator of the present invention will be described in detail below with reference to the accompanying drawings.

  FIG. 1A is an explanatory top view illustrating an example of a seatback-inducing actuator according to an embodiment of the present invention, and FIG. 1B is an upper-surface explanatory diagram illustrating a turning arm of the seatback-inducing actuator in FIG. FIG. 2 is an explanatory view of a main part of the seat back raising actuator shown in FIG. 1, and FIG. 3 is an explanatory view showing a relationship between a turning arm and a main gear of the seat back raising actuator shown in FIG.

Embodiment 1
Referring to FIGS. 1 to 3, the seat back raising actuator 1 according to the present embodiment includes a housing 2 attached to a vehicle, and a bearing B <b> 2 on a shaft A <b> 3 attached to the housing 2 (FIG. 3B). A main gear 6 that is rotatably supported via a shaft and a shaft P1 attached to the housing 2 so as to be pivotable via a bearing B1 (FIG. 3 (b)), and an inner cable 8 for raising a seat back. The driving device side terminal 8a is composed of a turning arm L which is attached to be freely turnable via a shaft P2 (FIG. 3B).

  The casing 2 has a hollow body (C1, C2) fixed thereto, and the inner cable 8 is introduced into the internal space (R1, R2). In the present embodiment, the hollow body C1 is coupled to the hollow body C2 by screwing, but the present invention is not limited to such a coupling method, and conventionally known coupling means can be applied. .

  Rotational torque output by an electric motor (not shown) is transmitted to the main gear 6 via a speed reduction mechanism. As the reduction gear mechanism, for example, the shaft A1 is directly connected to a rotating shaft (not shown) of an electric motor or connected via a worm / worm wheel, and torque transmitting means such as a key, a key groove, and a spline is used. The first gear 3 attached to the housing 2, the shaft A2 attached to the housing 2 is rotatably supported, the second gear 4 meshing with the first gear 3, the shaft A2 rotatably supported, and The third gear 5 is rotatably supported integrally with the second gear 4. However, it is not limited to such a configuration. Needless to say, conventionally known torque transmission means and deceleration mechanisms can be applied.

  The turning arm L is provided with a long hole La into which a pin T provided at an eccentric position of the main gear 6 is movably fitted. As shown in FIG. 3B, the pin 7a is composed of an axis A4 provided at an eccentric position of the main gear 6, and bearings T1 and T2 on the axis A4.

  With the above configuration, when the main gear 6 rotates, the revolving arm L reciprocates in a pendulum manner in cooperation with the pin T on the main gear 6 and the revolving arm L, whereby the inner cable 8 reciprocates. exercise. As the inner cable 8, a push-pull inner cable is preferably employed. The other end of the seat back raising inner cable 8 is connected to the seat back raising lever 21 as shown in FIGS. 4 and 5, and the raising operation of the seat back 40 is performed.

  An end of the outer casing 7 through which the inner cable 8 is slidably inserted is fixed to the distal end C2 of the hollow body (C1, C2). The terminal of the outer casing 7 is provided with a fixed portion 7a, separable with respect to the fixed portion 7a and movable in the spaces (R1, R2) of the hollow bodies (C1, C2), and the inner cable. 7 is comprised from the movable part M penetrated so that sliding is possible. The movable part M includes the movable part M (consisting of a large diameter part M1 and a small diameter part M2) in the space (R1, R2) of the hollow body (C1, C2). A compression coil spring S that functions as an urging means for urging the distal end side C2 of C1, C2) is provided. The diameter of the small diameter part M2 of the movable part M is slightly smaller than the diameter of the fixed part 7a fixed to the through-hole of the inner cable 8 provided at the distal end C2 of the hollow body (C1, C2), but the large diameter part M1. Is larger than the diameter of the fixed portion 7a fixed to the through-hole of the inner cable 8, so that the movable portion M biased to the distal end side C2 of the hollow body (C1, C2) is the hollow body (C1, C2). ) At the distal end side C2.

And as above-mentioned, the terminal by the side of the drive part of the outer casing 7 is separable with respect to the fixing | fixed part 7a and this fixing | fixed part 7a, and the inside of the space (R1, R2) of the said hollow body (C1, C2). The movable portion M is provided so as to be movable, and the inner cable 8 is slidably inserted therein. The outer casing 7 is fixed to be movable in the axial direction. When the above load (for example, 1000 N) is applied, a force is generated to make the inner cable 8 straight, and this force causes the movable portion M of the outer casing 7 to resist the urging force of the compression coil spring S. The load applied to the inner cable 8 is reduced by moving about 7 mm and shortening the routing path of the outer casing 7.
The seat back raising actuator 1 of the present embodiment is mainly intended to perform the raising operation of the conventional seat back 40 of FIGS. 4 and 5, and it is assumed that the reclining lock release is performed manually. .

FIG. 4 is a top explanatory view showing an example of a seat back raising actuator according to an embodiment of the present invention. FIG. 2 is a top explanatory view showing a swing arm of the actuator that raises the seat back of FIG. It is principal part explanatory drawing of the seat back raising actuator of FIG. It is explanatory drawing which shows the relationship between the turning arm of the seat back raising actuator of FIG. 1, and a main gear.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat actuator 2 Housing | casing 6 Main gear 7 Outer casing 8 Inner cable L Turning arm La Long hole C1, C2 Hollow body

Claims (1)

(A) a housing attached to the vehicle;
(B) a main gear rotatably provided in the housing;
(C) a swivel arm provided in the case so as to be turnable, and having a terminal of the inner cable for raising the seat back fixed thereto;
(D) a hollow body fixed to the casing and having the inner cable introduced into the inner space thereof;
(E) The rotational torque output by the electric motor is transmitted to the main gear via the speed reduction mechanism,
(F) The swivel arm is provided with a long hole that engages with a pin provided at an eccentric position of the main gear,
(G) An end of an outer casing through which the inner cable is slidably inserted is fixed to a distal end of the hollow body,
(H) A terminal of the outer casing is provided with a fixed part, a movable part that is separable from the fixed part and is movable in the space of the hollow body, and the inner cable is slidably inserted therethrough. Consists of
(I) A seat back raising actuator characterized by comprising an urging means for urging the movable part toward the distal end side of the hollow body.

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