JP2006335093A - Power walk-in seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power walk-in seat in which walk-in motion is generated manually, without causing the complication of a constitution or the like and without the deterioration of functionality. <P>SOLUTION: The power walk-in seat includes a driving device for power slide devices 15L and 14R, which is formed of a cable driving means 12 equipped with a clutch mechanism 56 to change over the transmission and non-transmission of power from a motor assembly 28 to rotary drum assemblies 32L and 32R. A slide locking means of a latch type to conduct lock-release motion interlocking with tilting forward of a seat back and lock-release motion interlocking with the rising restitution of the seat back is installed in line with the power slide devices in such a way as also capable of the manual lock-release operation. When the clutch mechanism 56 is not fed with a current, the manual actuation of the power slide devices 14L and 14R is made possible owing to the sole actuation guarantee of the rotary drum assemblies 32L and 32R generated by the shutting-off of the clutch mechanism 56. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power walk-in seat that moves a seat body from an arbitrary slide adjustment position to a front walk-in position under the drive of a motor that is interlocked with the forward movement of a seat back.

  For example, as a front seat of a two-door type passenger car, a second seat of a three-row seat car, etc., a so-called walk-in seat is provided that automatically moves the seat main body forward with a forward tilt of the seat back. . As one form of this type of walk-in seat, for example, a so-called power walk-in seat using a seat slide device (power slide device) that moves the seat body back and forth by the power of a motor is known.

  As this type of power walk-in seat, for example, a configuration disclosed in JP-A-3-146007 can be exemplified. And in this well-known structure, the combination of the screw shaft (lead screw) rotated by the drive of a motor and the non-rotatable screwing member (nut) which this screw shaft screwed together is the power slide apparatus. It is embodied as a drive device.

  By the way, in the case of a power slide device using a motor as a power source, it is necessary to take measures in the event of an emergency such as a failure of the motor itself or a malfunction of the electric system of the vehicle, for example, emergency measures such as subsequent forced operation by human power. Can also happen. However, the driving device used in the configuration disclosed in the above-mentioned JP-A-3-146007 slides the seat body in the front-rear direction only by the rotation of the lead screw (screw shaft) accompanying the driving of the motor. Therefore, in this known power walk-in seat, it cannot be denied that the forced operation of the power slide device by human power as an emergency measure after the occurrence of an emergency situation cannot be easily obtained.

  In other words, in this known configuration, no measures are taken in the event of an emergency such as a failure of the motor itself or a malfunction of the electric system of the vehicle. Therefore, the operability as a walk-in seat after the occurrence of this emergency has occurred. It is easily considered that the utilization is inferior.

In the case of general power-type on-vehicle equipment mounted on automobiles, etc., the ignition key of automobiles is usually used as a main switch that controls switching between energization and de-energization of the motor. In the in-seat, the walk-in operation is often performed only when the ignition key is in the ON state. However, with such a configuration, when the ignition key is turned off when the vehicle is parked or the like, the operation of the power walk-in seat cannot be obtained, so that the vehicle parking when the ignition key is used as a main switch is not possible. It is easy to be accompanied by a decrease in convenience at times.
JP-A-3-146007

  The problem to be solved is that the known power walk-in seat cannot easily perform the forced walk-in operation of the seat body by human power.

  In the power walk-in seat according to claim 1 of the present invention, the drive device of the power slide device includes a motor assembly having a motor, and an inner cable of a pair of control cables that are driven by a rotary drum driven by the power of the motor. A rotating drum assembly that relatively moves the extending end part forward and backward, and a clutch mechanism that switches transmission / non-transmission of power from the motor assembly to the rotating drum assembly by connecting / disconnecting with energization / non-energization. Cable drive means arranged on the upper rail side member of the power slide device, and a lock-off operation interlocked with the seat back of the seat body being moved forward and a lock-off releasing operation interlocked with the restoration of the seat back. The latch-type slide lock means Man also to the lock-off operation, that is parallel in at least one of the right and left power slide device, has as one of its main features.

  Then, the clutch of the cable driving means in accordance with the lock-off operation of the slide lock means interlocked with the forward tilting of the seat back and the detection and recognition of both of them by the corresponding predetermined tilt detection means and the predetermined lock detection means. By energizing the mechanism and the motor, the power slide device is automatically advanced to the walk-in position of the seat body under the driving of the motor in the corresponding direction, and the slide lock means interlocked with the restoration of the seat back standing up. By detecting the lock-off release operation and detecting and recognizing the seat back upright by the tilt detection means, the motor is driven in the corresponding direction along with the energization of the clutch mechanism of the cable drive means and the motor. The slide device is locked by the lock detecting means. The automatic reverse operation is performed until the detection and recognition of this, and the energization of at least the clutch mechanism of the cable driving means is cut off based on the detection and recognition by the lock detecting means accompanying the lock-on of the slide lock means. When the clutch mechanism is not energized, manual operation of the power slide device that is independent of the motor drive / non-drive is associated with the lock-off of the slide lock means by ensuring the independent operation of the rotary drum assembly of the cable drive means by cutting off the clutch mechanism. Making this possible is the most important feature of the power walk-in seat according to claim 1.

  According to a second aspect of the present invention, the clutch mechanism of the cable driving means has an output shaft that can be integrally rotated on the same axis and an output from the motor assembly having a flange-like rotating plate integrally therewith. Rotation driven by the rotor, and rotation of the rotor around the output shaft, coaxial rotation and slidable arrangement of the rotor, and rotation of the rotor to achieve integral rotation with the rotor plate A disk-shaped armature, an output gear that is arranged coaxially around the output shaft of the rotor and is a power output path to the rotating drum assembly, and is interposed between the armature and the output gear. Both of them can be rotated together under connection, and a spring plate for applying an urging force in the direction of the output gear to the armature and the magnetic force generated by energization. The armature sandwiching the rotor rotating plate makes it possible to forcibly hold the armature in the contact position with the rotor rotating plate by attracting the armature from the separated position against the biasing force of the spring plate. The most important feature is that it is provided with a combination with a substantially ring-shaped solenoid portion arranged at a position opposite to the above.

  Further, according to a third aspect of the present invention, two sets of rotating drum assemblies of the cable driving means are provided, and each rotating drum of the two sets of rotating drum assemblies is provided with a predetermined synchronous rotating mechanism with respect to the motor of a single motor assembly. The inner cable extension end of the forward / backward identical side of the pair of control cables of the rotary drum assembly extended from the upper rail of the power slide device. The main feature is that the lower rail is connected to the same front and rear ends.

  Since the power walk-in seat according to the first aspect of the present invention uses the cable driving means having the clutch mechanism as the driving device for the power slide device, if the clutch mechanism is in a non-energized state, Manual operation that is independent of driving / non-driving can also be obtained in this power slide device. The latch-type slide lock means provided in the power slide device is configured to be switched between lock-off and lock-on in conjunction with forward and backward restoration of the seat back of the seat body. Even when an emergency situation such as a malfunction of the electrical system occurs or when the motor cannot be driven due to the main switch being turned off, the seat body walk-in operation accompanying the forward tilting of the seat back can be obtained. According to the power walk-in seat of claim 1, it becomes possible to easily cope with emergency measures after the occurrence of an emergency or when the motor cannot be driven, so that the operability and usability as a walk-in seat are further improved. There is an advantage that the improvement of the convenience can be surely made.

  In the second aspect of the present invention, the clutch mechanism of the cable driving means is embodied as a combination of a coaxially provided rotor, armature, spring plate, and solenoid portion. This clutch mechanism that enables switching between transmission / non-transmission of power can be easily secured without complicating the structure.

  Further, according to the third aspect of the present invention, the cable driving means is embodied as one in which two sets of rotating drum assemblies are operated synchronously under the drive of a single motor. There is an advantage that it is possible to easily balance transmission balance and operation balance without complicating the configuration.

  The purpose of obtaining a forced walk-in operation by human power in the power walk-in seat can be realized without complicating the structure and without impairing the functionality as a power walk-in seat.

  FIG. 1 is a schematic plan view of a power walk-in seat 10 according to the present invention. As can be seen from FIG. 1, in the present invention, a power slide device 14 (L, R) that can be automatically operated by a drive device 12. Is formed in the lower part of the seat body 15.

  As can be seen from FIG. 2 in addition to FIG. 1, the power slide device 14 (L, R) includes a lower rail (also referred to as a guide rail) 20 that is fixed to the floor body 18, and the lower rail. A seat formed as a combination of a seat cushion 23 and a seat back 24 formed with a combination with a slidably assembled upper rail (also referred to as a runner) 22 and a driving device 12 using a motor 26 as a power source. The power walk-in seat 10 is roughly formed by mounting and fixing the main body 15 on the upper rail, for example.

  In addition, as a basic configuration of the power slide device used for this type of power walk-in seat, in particular, a lower rail, an upper rail, and the like, for example, those disclosed in Japanese Patent Application Laid-Open No. 2004-243811 can be exemplified.

  Here, in the present invention, the cable driving means for relatively moving the control cable forward and backward under the drive of the motor is used as the driving device 12 of the power slide device 14 (L, R). 3 and 4 are a schematic plan view and a schematic longitudinal sectional view of the cable driving means (driving means) 12. FIG. As can be seen, the cable driving means (driving device) 12 includes a single motor assembly 28 having a motor 26 and two sets of rotations having a rotating drum 30 that is rotationally driven by the driving of the motor. It is embodied as a drum assembly 32 (L, R).

  The rotary drum assembly 32 (L, R) includes a rotary drum 30 that is driven to rotate by driving of the motor 26, and an inner member in a relative winding direction around the rotary drum with the base end locked to the rotary drum. The cable 33-ai, 33-bi is wound around each of the control cables 33-a, 33-b, and each inner cable is formed in accordance with the direction of rotation of the rotary drum. Each rotating drum assembly is configured such that the inner cable extending end portion is integrally and relatively moved forward and backward by feeding the cable and winding the other inner cable.

  As can be seen from FIGS. 3 and 4, the cable driving means 12 is roughly unitized by, for example, assembling the pair of upper and lower upper casings 36 and 38. As shown in FIG. 1, the cable driving means 12 is disposed by being fixed to an upper rail side member such as a seat body 15 that is installed and fixed between the upper rail side members 22, for example, the left and right upper rails 22.

  As shown in FIGS. 3 and 4, the rotary drums 30 of the two sets of rotary drum assemblies 32 (L, R) are arranged so as to be integrally rotatable with respect to individual support shafts 42. Each rotary drum is rotatably provided by being pivotally supported between the casing 36 and the lower casing 38. The rotating drums 30 of the two sets of rotating drum assemblies 32 (L, R) are coupled to a single motor assembly 28 through a synchronous rotating mechanism 40 so as to be capable of synchronous rotation.

  As this synchronous rotation mechanism 40, for example, an output gear 46 provided on the output shaft 44 of the motor assembly 28 and a first relay gear 48 on the input side thereof are meshed with this output gear and provided on a gear shaft 50. Each rotation gear, which is engaged with the relay gear group and the second relay gear 52 on the output side of the relay gear group, and provided on the spindle 42 of the rotary drum so as to be able to rotate integrally with the rotary drum 30. A combination with a transmission gear 54 for each rotating drum of the drum assembly can be exemplified.

  The synchronous rotation mechanism 40 is configured to have a so-called reduction function that transmits the rotation of the output shaft 44 by the motor 26 to each rotary drum 30 while reducing the rotation.

  An outline of the power transmission path of the motor 26 and its operation in the cable driving means 12 will be described here.

  As can be seen from FIG. 3, when the output shaft 44, that is, the output gear 46 rotates in the counterclockwise direction indicated by the arrow under the drive of the motor 26, the first gear meshed with the output gear is obtained. The relay gear 48 and the second relay gear 52 that rotates integrally with the first relay gear rotate in the clockwise direction in the drawing, and the two sets of rotating drum assemblies 32 meshed with the second relay gear. The (L, R) transmission gears 54 are synchronously rotated in the counterclockwise direction in FIG.

  When the rotating drum 30 rotates in the counterclockwise direction in the drawing, the inner cable 33-ai for each rotating drum assembly 32 (L, R) moves in the drawing direction, and the inner cable 33-bi. Moves in the feeding direction. As described above, according to the cable driving means 12, it is possible to ensure the synchronous operation of the two sets of rotating drum assemblies 32 (L, R) by driving the single motor assembly 28.

  Further, if the output shaft 44, that is, the output gear 46 rotates in the clockwise direction in the figure opposite to the arrow under the drive of the motor 26, two sets of rotations follow the transmission procedure opposite to the above case. Since each transmission gear 54 of the drum assembly 32 (L, R) is rotated in the clockwise direction in the drawing together with the respective rotating drum 30, the inner cable 33-ai reverse to the above, and the inner The cable 33-bi is pulled in.

  Thus, the cable driving means 12 shown here has two sets of rotating drum assemblies 32 (L, R) that are actuated by the drive of a single motor 26, and these two sets of rotating drum assemblies are synchronized. Since the synchronous operation is performed via the rotating mechanism 40, the synchronized output can be obtained by the pair of advancing and retracting control cables 33-a and 33-b provided in each rotating drum assembly. The two sets of rotating drum assemblies 32 (L, R) need only be connected to the single motor assembly 28 via the synchronous rotating mechanism 40 so that they can be interlocked. It is possible to sufficiently simplify the configuration of the cable driving means 12 that enables the above.

  As each basic configuration of the motor assembly 28 and the rotating drum assembly 32 (L, R), for example, a known configuration disclosed in Japanese Patent Application Laid-Open No. 2004-162892 can be applied, and the basic configuration itself is this Since it is not the gist of the invention, a detailed description of these basic configurations will be omitted here.

  As can be seen from FIGS. 3 and 4, the cable drive means 12 used in the power walk-in seat of the present invention transmits power between the motor assembly 28 and the rotating drum assembly 32 (L, R). / A clutch mechanism 56 that can switch non-transmission is provided as part of a power transmission path between the motor assembly and the rotary drum assembly.

  As can be seen from FIGS. 5 and 6, the clutch mechanism 56 has the output shaft 44 described above so as to be integrally rotatable on the same axis, and a flange-like rotating plate 58 a integrally therearound. The rotor plate is rotated by substantially surface contact with a rotor 58 that is rotationally driven by the output from the motor assembly 28 and a rotor rotating plate that is arranged coaxially and slidably around the output shaft of the rotor. And a disk-shaped armature 60 that can be rotated integrally with the rotor, and a front output serving as a power output path to the rotary drum assembly 32 (R, L) that is arranged coaxially around the output shaft of the rotor. The output gear 46 is interposed between the armature and the output gear, and both of them can be rotated together under the connection to both, and the urging force in the direction of the output gear is applied to the armature. The armature is brought into contact with the rotor rotating plate by adsorbing the armature from its separated position against the biasing force of the spring plate under the magnetic force generated by energization. It is formed to have a combination with a substantially ring-shaped solenoid portion 66 disposed at a position opposite to the armature that sandwiches the rotor rotating plate so as to be forcibly held.

  The output gear 46 of this clutch mechanism functions as an output gear that is rotationally driven by the motor 26. As shown in FIGS. 3 and 4, the output, that is, the power of the motor 26 is transmitted from the output gear 46 to the rotary drum 30 of the rotary drum assembly 32 (L, R) through the synchronous rotation mechanism 40. Is granted.

  As shown in FIGS. 3 and 4, the motor assembly 28 of the cable driving means in this embodiment is, for example, a combination of a motor 26 and a gear box 67. The output end (not shown) of this gear box is shown in FIG. The motor assembly, that is, transmission of power from the motor to the rotor 58, is applied to the rotor 58 by engaging and engaging with the lower end 58b of the rotor shown in FIG. When the rotation of the motor 26 is transmitted and output to the output gear 46 of the clutch mechanism, the rotating drum 30 responds through the interlocking rotation of each gear of the synchronous rotation mechanism 40 accompanying the rotation of the output gear. The inner cables 33-ai and 33-bi are relatively moved forward and backward by the rotation of the rotating drum.

  Here, as described above, the armature 60 and the output gear 46 are coupled to each other via the spring plate 64 so as to be integrally rotatable, and are arranged around the output shaft 44 so as to be rotatable around the upper portion of the rotor rotating plate 58a in the drawing. Has been.

  As can be seen from FIG. 5 and FIG. 6, the spring plate 64 is formed of a substantially disc-shaped plate spring having an initial shape as a flat shape. Then, the inner peripheral portion roughly divided by the partial slit 65 is individually connected to the lower surface in the drawing of the output gear 46, and the outer peripheral portion is individually connected to the upper surface in the drawing of the armature 60 by the pins 68. Thus, the spring plate 64 is interposed between the armature and the output gear so that a biasing force in the direction of the output gear can be applied to the armature.

  As shown in FIG. 5, the output gear 46 is assembled to the output shaft 44 of the rotor by a bush 69 and a C ring 70 so as to be rotatable and impossible to move in the axial direction. The armature 60 is slidable in the axial direction of the output shaft 44 of the rotor, although the armature 60 is connected to the output gear 46 by the spring plate 64 so as to be integrally rotatable. It is supported by a spring plate so that it can move up and down with respect to the gear.

  FIG. 5 shows an initial state in which the armature 60 is urged in the direction of the output gear 46 under the urging force of the spring plate 64. In this initial state, the armature and the rotor rotating plate 58a are in contact with each other. A predetermined gap 72 is formed between them.

  In the state in which the gap 72 is formed between the armature 60 and the rotor rotating plate 58a, the output gear 46 is only supported rotatably with respect to the rotor 58, so that the output without the rotor is involved. The rotation of the gear alone can be secured.

  Further, as described above, in the clutch mechanism 56, the substantially ring-shaped solenoid portion 66 is disposed at a position opposite to the armature 60 sandwiching the rotor rotating plate 58a.

  The solenoid portion 66 is disposed around the lower portion of the rotor rotating plate 58a in the main body 74, and the armature 60 is attracted by the armature 60 when the solenoid portion is energized under the generation of the magnetic force. The rotor is forcedly held in the contact position with the rotary plate 58a.

  Here, the contact surfaces of both the armature 60 and the rotor rotating plate 58a are treated as rough surfaces having a high friction coefficient, for example, and by contacting them under the magnetic force from the solenoid unit 66, An integral rotation of the rotor 58 and the armature is obtained.

  As shown in FIG. 7, when a magnetic force is generated by energization of the solenoid portion 66, the armature 60 is forcibly held at the contact position with the rotor rotating plate 58 a against the urging force of the spring plate 64. . In such a contact state of the rotor with the rotary plate 58a, the armature 60 is rotated together with the rotor 58 under the frictional force between the contact surfaces, so that the contact between the armature and the rotary plate of the rotor is caused. The rotation of the output gear 46 by the power of the motor 26, that is, the synchronous operation of the rotary drum assembly 32 (L, R) via the synchronous rotation mechanism 40 becomes possible.

  As described above, in the cable driving means 12 having the clutch mechanism 56, the operation of the rotating drum assembly 32 (L, R) by the motor 26 is performed by switching between energization / non-energization of the clutch mechanism, specifically, the solenoid portion 66. In addition, it is possible to arbitrarily switch the guarantee of the independent operation of the rotating drum assembly independent of the motor.

  The cable driving means 12 having such a configuration takes the following connection form.

  Here, the connection of the pair of control cables 33-a and 33-b of the rotary drum assembly 32 (R) on the power slide device 14 (R) side will be described first.

  As can be seen from FIG. 2, the control cables 33-a and 33-b of the rotary drum assembly 32 (R) are connected to the outer casing 33 with respect to the relay members 76-a and 76-b arranged before and after the upper rail 22. The inner cables 33-ai and 33-bi are connected to each other in the corresponding front-rear direction through the rotatable relay pulley 78 of the relay member. Each is extended.

  As shown in FIG. 1, each end of the inner cables 33-ai and 33-bi is connected to a locking member 80 arranged at the front and rear ends of the lower rail 20 of the power slide device, and an appropriate tension of the inner cable is obtained. It is connected and locked while maintaining

  The pair of control cables 33-a and 33-b of the other rotary drum assembly 32 (L) of the cable driving means 12 is connected to the power slide device 14 (L). In the cable driving means 12 having this configuration, the power of the control cable of the rotating drum assembly 32 (L) is set to the same side as the control cable 33-a and 33-b of the power slide device 14 (R). The placement site for the slide device is determined.

  That is, the control cable 33-a of the rotary drum assembly 32 (L) that is pulled in synchronization with the pull-in of the control cable 33-a of the rotary drum assembly 32 (R) is the same as the rotary drum assembly 32 (R) side. A control cable 33-b of the rotary drum assembly 32 (L) that is arranged on the front side of the power slide device 14 (L) and is fed out in synchronization therewith is a rotary drum on the rotary drum assembly 32 (R) side. Similar to the control cable 33-b of the assembly 32 (R), the power slide device 14 (L) is disposed on the rear side.

  A pair of control cables 33-a and 33 are moved forward and backward with the end of the outer casing 33-ao and 33-bo being locked and held with respect to the relay members 76-a and 76-b arranged before and after the upper rail. -B is connected to the upper rail 22 of the power slide device 14 (L), and the terminals of the inner cables 33-ai and 33-bi extending forward and backward through a rotatable relay pulley 78 of the relay member Are connected and locked to the locking members 80 at the front and rear ends of the lower rail of the power slide device 14 (L).

  In the power walk-in seat 10 having such a connection form of the control cables 33-a and 33-b, the inner cables 33-ai and 33-bi are moved forward and backward as the motor 26 is driven. The upper rail 22, that is, the seat body 15, is slid in the corresponding front-rear direction. Then, the left and right power slide devices 14 (L, R) can be evenly operated by synchronously operating the two sets of rotating drum assemblies 32 (L, R) with the power from the single motor assembly 28. Therefore, according to the power walk-in seat 10 of the present invention in which the cable driving means 12 of this embodiment is used as the driving device of the power slide device 14 (L, R), the balance of power transmission balance between the left and right power slide devices is achieved. And balancing the operating balance can be easily achieved.

  As can be seen from FIG. 2, the power slide device 14 (L, R) used in the power walk-in seat 10 of the present invention is a latch that can be manually operated even though the motor is used as a power source. A slide lock means 82 of the type is also provided.

  The latch-type slide lock means 82 is, for example, supported by the upper rail 22 so as to be vertically movable, and a latch plate 84 having a lock claw 84a at its lower end, and the lock claw can be inserted and engaged. And a combination with a series of lock holes 86 provided in the lower rail 20.

  The latch plate 84 of the slide lock means is biased downward by a biasing force from a predetermined lock spring (not shown) of a support arm 87 pivotally attached to the upper rail 22 by a pivot pin 88. The lower end lock claw 84a is inserted into and engaged with the lock hole 86 of the lower rail under the biasing force applied to the support arm.

  By the way, in the case of the power slide device 14 (L, R) having such a slide lock means 82, it is necessary that the slide lock means be in a lock-off state during the operation (automatic operation) by the power of the motor 26. Become. Accordingly, in the present invention, it is possible to detect and recognize whether the slide lock means 82 is in the lock-on / lock-off state, and to ensure the drive of the motor 26 only when this slide lock means is in the lock-off state. It is supposed to be.

  As shown in FIG. 2, in this embodiment, for example, a micro switch 90 that is turned OFF by pressing the operation piece is provided as a lock detecting means for detecting and recognizing the lock state of the slide lock means 82. The lock detecting means is arranged so that the operation piece is pressed by the tip piece 87a of the support arm 87 at the lowered position of the latch plate 84 when the slide lock means 82 is in the lock-on state, that is, is turned off. It is installed.

  That is, in this embodiment, when the latch plate 84 is lowered, that is, when the slide lock means 82 is locked, the lock detecting means (microswitch) 90 is turned OFF by pressing the operation piece by the tip piece 87a of the support arm. The lock detecting means is turned ON by the movement of the tip end piece of the support arm to the upper position as shown by the one-dot chain line in FIG.

  Further, the seat back of the power walk-in seat is usually configured to be able to be tilted forward from the standing position when seated. And, in general power walk-in seats, the basic mode of automatically operating the power slide device in the corresponding direction in conjunction with the forward tilting of the seat back and the standing up restoration of the seat back from the forward tilted position. have.

  As can be seen from FIG. 2, as the reclining lock means 92 that holds the seat back 24 in the upright position and can ensure the forward tilting, for example, a reclining arm that can rotate around the hinge 94 of the seat back. 96 passive teeth 98, an active tooth 102 that can be engaged with the passive teeth provided on the lock plate 100 that can rotate around the pivot pin 99, and a predetermined biasing means 104. The lock plate can be held in the meshing position of the active tooth portion with respect to the passive tooth portion under the engagement of the engagement pin 105 under the rotation around the pivot pin 106 by the urging force. The holding plate is attached to the biasing means 104 under rotation about the pivot pin 108 with its partial engagement with the holding plate 107 and its partial engagement with the engaging pin of the holding plate. Examples include a combination with a lock-off plate 109 that can be removed from the engagement position against a force, but the reclining lock means itself is not the gist of the present invention, and is not limited thereto. A component having a configuration may be used as the reclining lock means.

  Here, the power walk-in seat 10 is configured to obtain an automatic operation of the power slide device 14 (L, R), that is, a walk-in operation of the seat body 15 in conjunction with the forward movement of the seat back 24. ing.

  This forward movement of the seat back 24 is, for example, for the actuator 110 shown in FIG. 1 connected to the lock-off plate 109 of the reclining lock means 92 and capable of automatic operation from a remote position, etc., and for manual operation shown in FIG. The traction lever 112 is used.

  As shown in FIG. 1 and FIG. 2, the actuator 110 mentioned here includes a control cable 114 by a starting operation with a starting switch (not shown) located at a remote position such as an instrument panel with respect to a built-in motor (not shown). The inner cable 114a can be moved back and forth, and the inner cable connected to the lock-off plate 109 of the reclining lock means is pulled under the motor drive, so that the reclining lock means 92 of this actuator is driven. Lock-off is possible.

  Further, according to the traction lever 112 directly connected to the lock-off plate 109 of the reclining lock means 92, the lock-off operation of the reclining lock means 92 is performed under the manual traction operation.

  When the reclining lock unit 92 is locked off by the actuator 110 or the traction lever 112, the seat back is automatically and forcibly tilted forward by the forward biasing force applied to the seat back 24. In other words, it is brought forward.

  Note that the seat back 24 is restored (standing up and restored) from the forward tilted position to a predetermined standing and restoring position under the operation of causing the seat back against the urging force by an occupant or the like. Examples of the predetermined upright restoration position include the position before adjustment at the time of reclining adjustment of the seat back.

  By the way, in this type of power walk-in seat 10, a walk-in operation of the seat body 15, that is, a power walk-in operation under the drive of the motor 26, is performed by the forward and backward restoration of the seat back 24. Therefore, it is necessary to link the lock-off operation of the slide lock means 82 of the power slide device and the lock-off release operation to the forward and backward restoration of the seat back. Therefore, in this power walk-in seat 10, the interlocking means 116 obtains interlocking between the lock-off operation of the slide lock means 82 and the lock-off releasing operation.

  As can be seen from FIG. 2, as this interlocking means 116, for example, the base end piece 87b of the support arm 87 can be pressed together with the support shaft 117 so that it can be pressed against the urging force of the lock spring. The pressing piece 118, the locking piece 120 provided integrally with the spindle, and the hinge 94 are rotated around the hinge 94 in conjunction with the forward and backward tilting of the seat back 24 between the predetermined standing position. A combination with a control cable 122 constructed and connected so as to be interlocked with the link plate 121 is exemplified.

  Specifically, each end of the inner cable 122-i of the control cable 122 is connected to the locking piece 120 and the link plate 121, respectively, and each end of the outer casing 122-o is connected via a bracket 124 or the like. It is fixedly held at each position.

  The link plate 121 of the seat back rotates in the corresponding direction in conjunction with the forward tilt of the seat back 24 under the engagement with the engagement pin 126 protruding from the reclining arm 96, for example. It has become.

  Here, in the power walk-in seat 10, the sliding direction of the seat body 15, that is, the rotational driving direction of the motor 26 differs depending on whether the seat back 24 is tilted forward or restored. Therefore, the walk-in seat 10 is embodied as a configuration in which the seatback 24 is tilted forward and restored, and the rotational drive of the motor 26 is switched in the rotational direction corresponding to the seatback position.

  Examples of the tilt detection means 128 that detects the forward and backward restoration of the seat back 24 include a switching type micro switch in which the contact contact is switched by pressing / release of the link plate 121.

  Hereinafter, the operation procedure of the walk-in seat 10 and the operation thereof will be described with reference to the flowcharts of FIGS. 8 and 9.

  As shown in FIG. 8, for example, when the reclining lock means 92 is locked off by the actuator 110 or the traction lever 112 in the normal seating posture of the seat body 15 (202), the seat back 24 is moved under a predetermined urging force. The tilt detection means 128 is switched to the forward tilt side under the pressing of the operation piece by the rotation of the link plate 121 accompanying the forward tilt of the seat back (204) (FIG. 2). (See dashed line).

  Then, by the lock-off operation of the slide lock means 82 interlocked with the forward tilting of the seat back 24, the lock detection means 90 changes its lock-off state under the release of the operation piece by the tip piece 87a of the support arm, for example. When detected (206) (see the one-dot chain line in FIG. 2), the clutch mechanism 56 of the cable driving means, more specifically, the clutch mechanism is connected by energizing the solenoid 66 (208). When the motor 26 is energized, the motor is started (210).

  The rotational drive direction of the motor 26 at this time is limited to the direction corresponding to the forward movement of the seat body 15 under the switching of the tilt detection means 128 to the forward tilt side.

  The fact that the seat main body 15 has reached a predetermined walk-in position, that is, the slide front limit position by the forward automatic operation of the power slide device 14 (L, R) accompanying the rotational drive of the motor 26 in the forward direction, for example, When detected by a limit switch (not shown) or the like, the seat main body is stopped and set at the walk-in position by the stop of the motor accompanying the detection (212), whereby the forward walk-in in the power walk-in seat 10 is performed. The operation ends (214).

  Further, when the seat body 15 is returned from the walk-in position, that is, the backward walk-in operation in the power walk-in seat 10 is as follows.

  As shown in FIG. 9, the backward walk-in operation in the power walk-in seat 10 is first started by restoring the standing-up by causing the seat back at the walk-in position where the seat back 24 is tilted forward (252).

  When the seat back 24 is raised and restored to the predetermined standing and restoring position with the reclining lock means 92 being locked on, the tilt detection means 128 is switched to the restoring side by the rotation of the link plate 121 and the rotation is restored. In conjunction with the rotation of the link arm, the slide lock means 82 of the power slide device is unlocked (254) (see the solid line in FIG. 2).

  Note that the slide lock means 82 of the power slide device is not locked at the walk-in position of the seat body 15, that is, does not have a lock hole 86 to be inserted and engaged in the vicinity of the latch claw 84 a of the latch plate. Therefore, even if the slide lock means is unlocked when the seat back 24 is raised and restored, the latch plate can be inserted and engaged with the lock claw aligned with the lock hole. It is only waited as a state, and is not locked on simultaneously with the release of the lock-off.

  Then, the seat back 24 is restored to the upright position, that is, the tilt detecting means 128 is switched to the restoring side, whereby the clutch mechanism 56 of the cable driving means is connected by energization (256). By energizing the motor 26, the motor is started in a direction corresponding to the backward movement of the seat body 15 (258).

  As the motor 26 is driven to rotate in the reverse direction, the seat main body 15 is retracted by the automatic operation of the power slide device 14 (L, R), thereby aligning the lock pawl 84a of the latch plate with the lock hole 86. Originally, when the slide lock means 82 is locked on and the lock detection means 90 detects the lock on, the motor 26 is stopped accordingly, and the seat body is stopped and held at the slide adjustment limit position ( 260), the backward walk-in operation in the power walk-in seat 10 is thereby temporarily terminated (262).

  Here, under the backward walk-in operation of the power walk-in seat 10, the seat body 15 is merely returned to the position before slide adjustment. Therefore, in the present invention, the slide position of the seat body is arbitrarily adjusted under a manual lock-off operation at the position before the slide adjustment.

  As shown in FIG. 9, in the present invention, after the motor 26 is stopped, the clutch mechanism 56 is disconnected while the clutch mechanism 56 is de-energized, whereby the rotary drum assembly 32 of the cable driving means is operated independently. It is in a possible free state (264). When the clutch mechanism 56 is in the disconnected state, the slide lock means 82 is locked off under the operation of the operation lever 130 provided integrally with the support shaft 117 of the interlock means 116 as shown in FIG. By doing so, it becomes possible to manually adjust the seat position of the seat body 15 placed and supported on the power slide device 14 (L, R) (266), and the seat under the subsequent lock-on of the seat slide locking means. By setting the position, the backward walk-in operation including the position setting in the power walk-in seat 10 is completed (268).

  As described above, in the power walk-in seat 10 according to the present invention, the cable driving means 12 having the clutch mechanism 56 is used as a driving device for the power slide device 14 (L, R). If the clutch mechanism is in the disengaged state, it is possible to obtain a manual operation irrelevant to driving / non-driving of the motor also in this power slide device. That is, since the auto walk-in operation and the manual operation for the seat body 15 as described above can be used together, the walk-in operation in the power walk-in seat 10 can be sufficiently simplified.

  The latch-type slide lock means 82 provided in the power slide device 14 (L, R) is configured to be switched between lock-off and lock-on in conjunction with the forward and backward restoration of the seat back 24 of the seat body 15. Therefore, even in the event of an emergency such as a failure of the motor 26 or a malfunction of the electric system of the vehicle, or even when the motor cannot be driven due to the main switch being turned off, etc., the seat body accompanying the forward movement of the seat back The walk-in operation is obtained. Therefore, according to the present invention, it is possible to easily cope with emergency measures after the occurrence of an emergency situation or when the motor 26 cannot be driven, and thus the operability, usability, and convenience of the power walk-in seat are provided. The improvement of the property is surely made.

  In this embodiment, the slide adjustment of the seat body 15 is embodied by performing the lock-off / lock-on of the slide lock means 82 by manual operation. For example, a control cable 132 as shown in FIG. The slide adjustment of the seat body can be automatically controlled under the automatic control by an actuator (not shown) or the like.

  In this embodiment, the clutch mechanism 56 of the cable driving means is embodied as a combination of a rotor 58, an armature 60, an output gear 46, a spring plate 64, and a solenoid portion 66 as shown in FIGS. However, it is sufficient that the transmission / non-transmission of power from the motor assembly 28 to the rotating drum assembly 32 (L, R) can be switched by the energization / non-energization. It is not limited to.

  However, with the configuration of the clutch mechanism 56 in this embodiment, switching between transmission / non-transmission of power between the motor assembly 28 and the rotary drum assembly 32 (L, R) is not accompanied by a complicated configuration. It becomes possible to obtain appropriately.

  Further, in this embodiment, the cable driving means 12 is embodied as a configuration having two sets of rotary drum assemblies 32 (L, R), but is not limited to this, for example, a set of rotary drum assemblies is used. This cable drive means may be formed as it has.

  However, according to this configuration, two sets of rotating drum assemblies 32 (L, R) that are operated in synchronization can be individually connected to the left and right power slide devices 14 (L, R). Therefore, it is possible to easily balance the power transmission balance and the operation balance in the power slide device of the present invention without complicating the configuration.

  The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention. All modifications, alterations, etc. within the technical scope of the present invention are included in the present invention. Needless to say.

  This power walk-in seat can be embodied as a front seat of a two-door type passenger car or a second seat of a three-row car, but it can also be embodied in a power walk-in seat used as these seats. The present invention is applicable.

1 is a schematic plan view of a power walk-in seat according to the present invention. It is a partial side view of the power slide device in this power walk-in seat. It is a schematic plan view of a cable drive means. FIG. 4 is a schematic longitudinal sectional view taken along line AA in FIG. 3. It is a schematic front view of a partially broken view showing the clutch mechanism of the cable driving means when not energized. It is a general | schematic disassembled perspective view of the clutch mechanism of a cable drive means. It is a schematic front view of a partially broken view showing a clutch mechanism during energization of the cable driving means. 6 is a schematic flowchart showing a forward walk-in operation. It is a general | schematic flowchart which shows reverse walk-in operation | movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Power walk-in sheet 12 Cable drive means 14 (L, R) Power slide apparatus 26 Motor 28 Motor assembly 32 (L, R) Rotating drum assembly 46 Output gear 56 Clutch mechanism 58 Rotor 60 Armature 64 Spring plate 66 Solenoid part 82 Slide Lock means 90 Lock detection means 92 Reclining lock means 116 Interlocking means 128 Tilt detection means

Claims (3)

A predetermined driving device having a pair of left and right power slide devices having a combination of a lower rail that can be fixed to the floor body; a seat body mounting and a fixed upper rail; and a motor as a power source. In the power walk-in seat where the seat body walk-in operation is performed under the power of this motor by the automatic operation of this power slide device by
A motor assembly including the motor; a rotary drum assembly that relatively moves the extending ends of the inner cables of the pair of control cables forward and backward by driving the rotary drum by the power of the motor; And a clutch mechanism for switching transmission / non-transmission of power from the motor assembly to the rotating drum assembly by connecting / disconnecting with non-energization, and a cable drive disposed on the upper rail side member of the power slide device And a latch-type slide lock means that performs a lock-off operation in conjunction with the forward-back of the seat back of the seat body and a lock-off release operation in conjunction with the restoration of the seat back. The above left and right power slides are also possible Juxtaposed to at least one of location,
A lock-off operation of the slide lock means in conjunction with the forward tilting of the seat back, and detection and recognition of both of them by a predetermined tilt detection means and a predetermined lock detection means corresponding to each of the cable drive means. By energizing the clutch mechanism and the motor, the power slide device is automatically advanced to the walk-in position of the seat body under the driving of the motor in the corresponding direction,
The clutch mechanism of the cable driving means and the motor under the detection and recognition of the lock-off releasing operation of the slide lock means interlocked with the standing restoration of the seat back and the seat back standing restoration by the tilt detection means By driving the motor in the corresponding direction along with energization to the power slide device, the power slide device is automatically operated backward until detection and recognition of the lock on the slide lock means by the lock detection means,
Based on the detection and recognition by the lock detection means accompanying the lock-on of the slide lock means, at least the power supply to the clutch mechanism of the cable drive means is cut off, and the power is cut off when the clutch mechanism is not energized. By ensuring the independent operation of the rotary drum assembly of the cable drive means according to the above, it is possible to manually operate the power slide device irrespective of the driving / non-driving of the motor in conjunction with the lock-off of the slide lock means. A featured power walk-in seat. The clutch mechanism of the cable driving means is
A rotor which has an output shaft so as to be integrally rotatable on the same axis and has a flange-like rotating plate integrally therearound, and which is driven to rotate by the output from the motor assembly;
A disk-shaped armature arranged so as to be rotatable and slidable on the same axis around the output shaft of the rotor and capable of rotating integrally with the rotating plate by substantially surface contact with the rotating plate of the rotor;
An output gear that is disposed coaxially around the output shaft of the rotor and serves as a power output path to the rotary drum assembly;
A spring plate that is interposed between the armature and the output gear, and that allows both of them to rotate as a single unit under the connection between the armature and the output gear, and applies a biasing force in the direction of the output gear to the armature;
The armature can be forcibly held in the contact position with the rotor rotating plate by attracting the armature from the separated position against the biasing force of the spring plate under the magnetic force generated by energization. A substantially ring-shaped solenoid portion disposed at a position opposite to the armature sandwiching the rotor rotating plate;
The power walk-in seat according to claim 1, comprising a combination of: Two sets of rotating drum assemblies of the cable driving means are provided, and each rotating drum of the two sets of rotating drum assemblies performs synchronous rotation with respect to the motor of a single motor assembly via a predetermined synchronous rotating mechanism. Each connected as possible,
Of the pair of control cables of the rotary drum assembly that extend from the upper rail of the power slide device, the inner cable extending end portion on the same side of the forward and backward movement is connected to the same front and rear end portions of the lower rail. The power walk-in seat according to claim 1 or 2.

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