JP2010188959A - Vehicular seat device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a vehicular seat device having a mechanism capable of applying an appropriate biasing force for both "folding" and "raising" operation. <P>SOLUTION: The vehicular seat device includes a support mechanism 40 for supporting a tilting motion between the seating position and the horizontal position of a seat back frame 20. The support mechanism 40 has a motor drive unit 41 comprising a motor and a first sector gear, and a drive conversion control unit 42 comprising a second sector gear capable of interlocking with the tilting motion of the seat back frame 20 and a detection means for detecting the forward tilting motion and the returning motion of the seat back frame 20 by the turning of the second sector gear. The detection means is disposed on the circumference of the second sector gear at a distance, capable of contacting a projection provided on the second sector gear. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat device that can be widely used by folding and storing the vehicle interior when not in use.

  The reclining function for adjusting the inclination angle of the seat back in a seat mounted on a vehicle or the like is now an indispensable function. The reclining function not only realizes an appropriate riding posture according to the body shape of the occupant seated on the seat, but also plays a role in effectively utilizing the limited vehicle interior space. Specifically, when the occupant does not sit on the rear seat (second row seat or third row seat) arranged immediately in front of the cargo compartment, the seat back of the rear seat faces the seat cushion seat surface. The cargo space can be expanded by moving forward.

  As a vehicular seat that enables the cargo space to be expanded as described above, the one disclosed in Patent Document 1 is known. In the “vehicle seat device” described in Patent Document 1, the lower part of the seat cushion is connected to the body by at least a pair of front and rear links of the first link and the second link so that the seat cushion moves rearward. At least one of the first link and the second link incorporates a spring body that applies a resilient force so that the seat is positioned at a neutral point where the seat weight and the resilient force are balanced. According to such a technique, the assisting force of the spring body can be obtained when the seat is moved to either the use position or the storage position, so that the occupant can move the seat with relatively little force, It can be said that this is an effective technique in that the rear surface of the stored seat back and the vehicle floor surface can be arranged substantially on the same plane, and the cargo space can be used effectively.

  However, the vehicle seat device according to Patent Document 1 urges the seat from the state of both the use position and the storage position of the seat to the neutral position (the seat is to be lifted from the storage state to the use state). Therefore, when folding to store, the seat must be pushed against the biasing force, which imposes a burden on the passenger. If the urging force is set so as to be easy to push in, the urging force is insufficient and cannot return to the neutral position, and the occupant is burdened. In particular, when the cushion portion as seen in recent rear seats is a wide seat, the weight of the seat itself increases, and there is a problem that it is difficult to set an optimal biasing force.

  In this regard, the “vehicle seat” described in Patent Document 2 is particularly mounted on a crane vehicle or the like, and a seat cushion supported by a pair of front and rear parallel links is urged from behind by a gas spring. The occupant only needs to operate the gas spring when raising and lowering the seat cushion, and can avoid overloading the occupant performing the crane operation.

  However, when the vehicle seat according to Patent Document 2 is mounted on a general passenger car, the cylinder related to the gas spring erodes the cargo compartment space, so that it is difficult to adopt the seat in the row immediately before the cargo compartment space. Thus, even with the invention described in Patent Document 2, the problem included in the technique described in Patent Document 1 cannot be solved.

  On the other hand, as a method of changing the form between the use position and the storage position of the seat, there is a power seat arrangement mechanism that performs a series of operations fully automatically, but a large motor must be used as a drive means. It is difficult to equip small cars such as mini cars.

JP 2004-276816 A Japanese Utility Model Publication No. 52-44004

  In view of the location of the above problems, the present invention has been devised to recognize the difference between an appropriate biasing force when folding the seat back against the seat cushion and an appropriate biasing force when raising the seat back to the use position. Is to provide a vehicle seat device having a mechanism capable of urging appropriate urging force for both “folding” and “raising” at a low cost.

In order to solve the above-described problem, in the vehicle seat device according to claim 1, “a seat cushion frame that supports a seat cushion on which an occupant is seated;
A reclining device attached to the seat cushion frame;
A seat back frame that is pivotally attached to the seat cushion frame by the reclining device and can be moved forward from a seating position to a horizontal position parallel to the seat cushion frame;
A support mechanism that is attached to the seat back frame and supports the tilting operation of the seat back frame.The support mechanism includes a motor drive unit and a drive conversion control unit.
The motor drive unit includes a motor and a first sector gear that is rotated by the motor,
The drive conversion control unit is a second sector gear that rotates in conjunction with the tilting operation of the seat back frame;
Detecting means for detecting a forward tilting operation and a returning operation of the seat back frame by rotating the second sector gear;
The second sector gear is provided with a protrusion, and the detection means is arranged on the circumference of the second sector gear with a distance that the protrusion can contact, and the protrusion contacts the detection means and rotates. To detect forward tilt or return motion,
When the seat back frame is tilted forward, it rotates even if it comes in contact with the detection means for detecting the return operation, but it is not detected.
When the seat back frame is returned, it rotates even if it comes into contact with a detecting means that detects a forward tilting action, but it does not detect it.
The first sector gear and the second sector gear each include a connecting portion that allows one to rotate in conjunction with the rotation of the other when the first sector gear rotates.
By slightly moving the seat back frame from a seating position or a horizontal position, the detection means detects a forward tilting operation or a returning operation, and operates the motor.
The technical feature is that the tilting operation of the seat back frame is supported by rotating the first and second sector gears with the driving force of the motor.

  According to the vehicle seat device of the first aspect, the vehicle seat device includes the support mechanism that supports the tilting operation between the seating position and the horizontal position of the seat back frame in the vehicle seat device, and the support mechanism includes the motor and the first mechanism. Detection by detecting rotation of the second sector gear with a motor drive unit composed of a sector gear, a second sector gear that can be linked with a tilting operation of the seat back frame, and a forward tilting operation and a returning operation of the seat back frame And a drive conversion control unit constituted by the means, and the detecting means is arranged on the circumference of the second sector gear with a distance that the protrusion provided on the second sector gear can contact.

  As a result, by slightly operating the seat back frame from the seating position or the horizontal position, the second sector gear rotates, and the detection means can detect and drive the motor. As a result, the driving force of the motor rotates the first and second sector gears to support the tilting operation of the seat back frame. By providing such a support mechanism, the seat back frame can be tilted forward and returned only by the rotation of the second sector gear, and the seat back frame can be tilted with an inexpensive structure with a small number of parts. Can be supported with an appropriate biasing force.

FIG. 1 is a side view of a vehicle seat device according to the present invention. 2A and 2B are enlarged views of the support mechanism, in which FIG. 2A is a right front perspective view and FIG. 2B is a right rear perspective view. FIG. 3 is an enlarged view of the drive conversion control unit. 4A and 4B show a control circuit, in which FIG. 4A is a view showing when the seat back is in a seatable position, and FIG. 4B is a view showing that the seat back is parallel to the seat cushion. It is the figure which showed the state.

  A vehicle slide rail device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a vehicle seat device according to the present invention. 2A and 2B are enlarged views of the support mechanism, in which FIG. 2A is a right front perspective view and FIG. 2B is a right rear perspective view. FIG. 3 is an enlarged view of the drive conversion control unit. 4A and 4B show a control circuit, in which FIG. 4A is a view showing when the seat back is in a seatable position, and FIG. 4B is a view showing that the seat back is parallel to the seat cushion. It is the figure which showed the state.

  As shown in FIG. 1, a vehicle seat apparatus 100 according to the present invention includes a seat cushion frame 10 that supports a seat cushion on which an occupant is seated, a seat back frame 20 that supports a backrest, and a seat back frame for the seat cushion frame 10. A reclining device 30 that locks the rotation of the seat 20 and a support mechanism 40 that supports the turning operation of the seat back frame 20 are provided.

  A seat back frame 20 is rotatably attached to the seat cushion frame 10 via a reclining device 30, and a support mechanism 40 is provided on a side surface side of the seat back frame 20. The reclining device 30 uses a general reclining device as described in, for example, Japanese Patent Application Laid-Open No. 2000-102440, and can be unlocked by operating the operation lever 31.

  Next, the support mechanism 40 will be described. As shown in FIG. 2, the support mechanism 40 includes a motor drive unit 41 and a drive conversion control unit 42. The motor drive unit 41 includes a motor 50, a first intermediate gear 51, a second intermediate gear 52, a connection spring 53, and a first sector gear 54. The drive conversion control unit 42 includes a second sector gear 55, a forward tilt detection unit 56, a rear tilt detection unit 57, a connection gear 58, and a lycra gear 59.

  The motor drive unit 41 and the drive conversion control unit 42 are mainly attached to the seat back frame 20 as shown in FIG. First, a first intermediate gear 51 rotatably supported below the motor 50 is engaged with a gear of the motor 50, and a second intermediate gear rotatably supported below the first intermediate gear 51. 52 are engaged. A first sector gear 54 is attached to the same axis as the second intermediate gear 52, and the second intermediate gear 52 and the first sector gear 54 are connected by a connecting spring 53. When either one of the gears rotates, the connecting spring 53 is connected. The other gear rotates against the elastic force.

  Further, the axis of the first sector gear 54 is coaxial with the axis of the second sector gear 55 constituting the drive conversion control unit 42, and the two gears are arranged so as to be able to turn adjacent to each other. The second sector gear 55 is integrally provided with a connecting pin 55a. When the second sector gear 55 rotates, the connecting pin 55 rotates and comes into contact with the first sector gear 54, thereby causing the first and second sector gears 55 to rotate. The second sector gear can be rotated simultaneously.

  Below the second sector gear 55, a connecting gear 58 is rotatably attached, and is connected to the lycra gear 59 via the connecting gear 58. The lycra gear 59 is attached coaxially with the central axis of the reclining device 30, is fixed on the circumference of the reclining device 30, and the connecting gear 58 can roll on the clincher gear 59.

  Protrusions 55b and 55b are provided on the circumference of the second sector gear 55. When the second sector gear 55 rotates, the forward inclination detecting means 56 and the backward inclination detecting means are located at positions where the protrusions 55b and 55b can contact. 57 is provided. The forward inclination detection means 56 and the backward inclination detection means 57 are substantially elliptical, and are pivotally supported at substantially the center so that they rotate when the projections 55b, 55b of the second sector gear 55 come into contact with each other, and one side of each detection means Each is provided with a forward tilt limit switch 56a and a rear tilt limit switch 57a. When each detecting means rotates, the limit switch is turned on only in one direction. When each of the limit switches 56a and 57a is turned on, the motor 50 is started.

  FIG. 3 is an enlarged view of the drive conversion control unit 42 with the front side of the seat facing left. With respect to the second sector gear 55, as shown in FIG. 3, the forward tilt detecting means 56 and the backward tilt detecting means 57 are arranged so that the end on the sector gear side is spaced at a distance shorter than the height of the projection 55b. It is attached to the circumference.

  Further, a forward tilt stop limit switch 54a and a rear tilt stop limit switch 54b are attached to the circumference of the first sector gear 54, and are turned off when the notches 54c and 54d provided in the first sector gear 54 are positioned. It is supposed to become.

  Next, the operation will be described. The operation of the vehicle seat device 100 according to the present invention will be described from a state in which an occupant can sit as shown in FIG. When the operation lever 31 is operated to move the seat back (seat back frame 20) forward, that is, to fold the seat back horizontally with respect to the seat cushion (seat cushion frame 10), the reclining device 30 is unlocked, and the seat cushion The seat back frame 20 is tilted forward in the forward tilt direction by the urging force of the spiral spring 60 suspended between the frame 10 and the seat back frame 20.

  When the seat back frame 20 is tilted forward, the connecting gear 58 meshes with the connecting gear 58 and rolls forward (rotates counterclockwise in FIG. 3), and the connecting gear 58 rolls to mesh with it. The second sector gear 55 rotates (rotates clockwise in FIG. 3). Then, the protrusion 55b comes into contact with the forward tilt detection means 56, and the forward tilt detection means 56 rotates (rotates counterclockwise in FIG. 3). By doing so, the forward tilt limit switch 56a provided on one side surface (the vehicle front side in FIG. 3) of the forward tilt detection means 56 is turned on.

  The second sector gear 55 rotates with the urging force of the spiral spring 60 together with the seat back frame 20, and the connecting pin 55 a protruding from the second sector gear 55 also rotates, and the connecting pin 55 a is connected to the first sector gear 54. It will abut. At the same time, since the protrusion 55b is provided so that the forward tilt limit switch 56a described above is turned on, the motor 50 is started.

  When the motor 50 is started, the first intermediate gear 51 meshed with the gear of the motor 50 is rotated, and the second intermediate gear 52 meshed with the first intermediate gear 51 is rotated. When the second intermediate gear 52 rotates, the connection spring 53 connected to the gear is wound against the urging force, and further rotated to rotate the first sector gear 54 in the same direction as the second sector gear 55. It has become. As a result, the seat back frame 20 tries to fall down vigorously due to its own weight and the urging force of the spiral spring 60, and the connecting pin 55 a of the second sector gear 55 comes into contact with the first sector gear 54, thereby It will slowly and automatically be advanced to the horizontal position.

  Here, since the coupling spring 53 is interposed, for example, when the seat back frame 20 hits a part of the human body when the seat back frame 20 falls forward, there is a margin for the elastic force. It can be avoided and it is safe.

  When the second sector gear 55 rotates when the seat back frame 20 is tilted forward, the projection 55b first contacts the forward tilt detection means 56 to turn on the forward tilt limit switch 56a. By the time the position is reached, the protrusion 55b also comes into contact with the rearward tilt detection means 57. Then, as a matter of course, the rearward tilt detecting means 57 also rotates, but the rearward tilt limit switch 57a is arranged not to be turned on when rotating in the same direction as the forward tilt detecting means 56. That is, as can be seen from FIG. 3, the backward tilt limit switch 57a is mounted upside down with respect to the forward tilt limit switch 56a.

  When the seat back frame 20 is moved forward to the horizontal position, the notch 54d of the first sector gear 54 rotates to the position of the forward tilt stop limit switch 54a, and the forward tilt stop limit switch 54a is moved to the position of the notch 54d. The motor 50 is stopped at the position.

  Next, the returning operation from the horizontal position to the seating position will be described. When the occupant gently lifts the seat back frame 20 in the horizontal position, the connecting gear 58 rolls in the opposite direction (clockwise in FIG. 3) from when the cradle gear 59 is moved forward. As a result, the second sector gear 55 rotates in the opposite direction to the connecting gear 58 (the counterclockwise direction in FIG. 3). Then, the projection 55b first comes into contact with the backward tilt detecting means 57. As described above, in this case, the backward tilt limit switch 57a is turned on.

  When the rearward tilt limit switch 57a is turned on, the motor 50 rotates in the reverse direction with respect to when the forward tilt limit switch 56a is turned on. Along with this, the first intermediate gear 51 and the second intermediate gear 52 also rotate in the reverse direction to the forward tilt. Therefore, the first sector gear 54 also rotates toward the connecting pin 55a of the second sector gear 55, contacts the connecting pin 55a, and then rotates by pushing the second sector gear 55 through the connecting pin 55a. Then, the connecting gear 58 is also rotated, and as a result, the seat back frame 20 itself can be pulled up by the force of the motor 50. As a result, the occupant only needs to first lift the seat back frame 20 lightly, and the subsequent return operation can be performed with the power of the motor 50. The return operation can be performed easily.

  Next, control of the vehicle seat apparatus 100 will be described using the control circuit shown in FIG. FIG. 4A is a view showing a state where the seat back is in a seatable position. When the operation lever 31 shown in FIG. 3 is operated to unlock the reclining device 30, the operation lever is detected. The switch 31a is turned off. When the lock of the reclining device 30 is released, the seat back frame 20 starts to rotate in the forward tilt direction by the urging force of the spiral spring 60, the second sector gear 55 rotates, the forward tilt detection means 56 is turned on, and the motor 50 rotates in the forward tilt direction, the first sector gear 54 rotates, the forward tilt stop limit switch 54a and the rear tilt stop limit switch 54b remain on, and the seat back frame 20 is moved to a safe speed. It will be tilted forward.

  Thereafter, when the seat back frame 20 is moved forward to the horizontal position with respect to the seat cushion frame 10, the notch 54d of the first sector gear 54 is positioned at the forward tilt stop limit switch 54a, so the forward tilt stop limit switch 54a is Turn off. Then, since the electric power is not supplied to the motor 50, the motor 50 is stopped and is brought forward as shown in FIG.

  The return from the forward-turned state shown in FIG. 4B to the seating position will be described. When the seat back (seat back frame 20) is lifted lightly by the occupant, the second sector gear 55 rotates in the return direction to detect the backward tilt. The means 57 is turned on, and the motor 50 rotates in the return direction. When the motor 50 rotates, the first sector gear 54 rotates, and the forward tilt stop limit switch 54a and the rear tilt stop limit switch 54b remain on. When the first sector gear 54 rotates, the first sector gear 54 abuts on the connecting pin 55a of the second sector gear 55 and pushes the second sector gear 55 to rotate simultaneously. Then, the notch 54c of the first sector gear 54 is positioned at the rearward tilt stop limit switch 54b. However, as shown in the circuit of FIG. 4, the operation lever detection switch 31a is turned on, that is, the reclining device 30 is locked and the operation lever Unless the motor 31 is returned to the original position, the motor 50 does not stop and further rotates because it does not depend on the state of the rearward tilt stop limit switch 54b.

  When the motor 50 continues to rotate, the first sector gear 54 further rotates, the notch 54c passes the limit switch 54b for backward tilt stop, and the limit switch 54b is turned on again. Thereafter, the seat back frame 20 is returned by the rotation of the second sector gear 55, and when the seating position is reached, the reclining device 30 is locked, the operating lever 31 returns to the original position, and the operating lever detection switch 31a is turned on. It becomes.

  At this time, since the control lever detection switch 31a is on, the forward tilt stop limit switch 54a is off, and the rear tilt stop limit switch 54b is on, the motor 50 moves forward from the return direction as can be seen from the circuit of FIG. It will be switched to rotation in the tilt direction. Accordingly, the first sector gear 54 rotates again in the forward tilt direction. When the first sector gear 54 reaches the position shown in FIG. 3, the rear tilt stop limit switch 54b is turned off, the motor 50 is stopped, and the return operation is completed.

  Here, after the seat back frame 20 is locked by the reclining device 30, the motor 50 stops again after rotating in the forward tilt direction, so the first sector gear 54 is slightly moved from the connecting pin 55 a of the second sector gear 55. It will stop at a distance. By doing so, the force applied to the second sector gear 55 is not directly applied to the first sector gear 54, making it difficult to apply a load to the motor 50, and the second sector gear when entering the forward tilting operation. Since the 55 connecting pins 55a can be moved slightly until they abut against the first sector gear 54, it is easy to detect the forward tilt, and it is possible to easily take the timing until the motor 50 starts.

DESCRIPTION OF SYMBOLS 100 Vehicle seat apparatus 10 Seat cushion frame 20 Seat back frame 30 Reclining apparatus 31 Operation lever 31a Operation lever detection switch 40 Support mechanism 41 Motor drive part 42 Drive conversion control part 50 Motor 51 First intermediate gear 52 Second intermediate gear 53 Connection Spring 54 First sector gear 54a Forward tilt stop limit switch 54b Back tilt stop limit switch 54c Notch 54d Notch 55 Second sector gear 55a Connection pin 55b Protrusion 56 Forward tilt detection means 56a Forward tilt limit switch 57 Back tilt detection means 57a Limit switch 58 for tilting backward 58 Connecting gear 59 Licra gear 60 Spiral spring

Claims (1)

A seat cushion frame that supports the seat cushion on which the occupant sits;
A reclining device attached to the seat cushion frame;
A seat back frame that is pivotally attached to the seat cushion frame by the reclining device and can be moved forward from a seating position to a horizontal position parallel to the seat cushion frame;
A support mechanism that is attached to the seat back frame and supports the tilting operation of the seat back frame.The support mechanism includes a motor drive unit and a drive conversion control unit.
The motor drive unit includes a motor and a first sector gear that is rotated by the motor,
The drive conversion control unit is a second sector gear that rotates in conjunction with the tilting operation of the seat back frame;
Detecting means for detecting a forward tilting operation and a returning operation of the seat back frame by rotating the second sector gear;
The second sector gear is provided with a protrusion, and the detection means is arranged on the circumference of the second sector gear with a distance that the protrusion can contact, and the protrusion contacts the detection means and rotates. To detect forward tilt or return motion,
When the seat back frame is tilted forward, it rotates even if it comes in contact with the detection means for detecting the return operation, but it is not detected.
When the seat back frame is returned, it rotates even if it comes into contact with a detecting means that detects a forward tilting action, but it does not detect it.
The first sector gear and the second sector gear each include a connecting portion that allows one to rotate in conjunction with the rotation of the other when the first sector gear rotates.
By slightly moving the seat back frame from a seating position or a horizontal position, the detection means detects a forward tilting operation or a returning operation, and operates the motor.
A vehicle seat device that supports the tilting operation of the seat back frame by rotating the first and second sector gears with the driving force of the motor.

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