JP4413727B2 - Vehicle seat device - Google Patents

Description

  The present invention relates to a vehicle seat device including a lock mechanism for fixing a headrest at a use position, and a lock release mechanism for releasing a lock state by the lock mechanism.

  Conventionally, many vehicles have been developed in which seat cushions and seat backs can be folded and stored. For example, the rear part of the seat cushion is supported so that it can be flipped up around the front part of the seat cushion connected to the floor part of the vehicle body by a hinge part, and the seat back is moved forward by a reclining mechanism fixed to the floor part of the vehicle body. 2. Description of the Related Art A vehicle seat device that is supported so as to fall down is known. In this vehicle seat device, after the seat cushion is flipped forward, the seat back is tilted forward so that the back surface of the seat back that is tilted forward functions substantially as a part of the cargo floor. Can do. Thereby, the floor surface of the luggage compartment at the rear of the vehicle body can be expanded. In such a vehicle seat device, when the headrest is mounted on the upper part of the seat back, the headrest interferes with the front seat when the seat back is tilted forward when the folding structure as described above is adopted. There is. Therefore, conventionally, one end of the operation cable is connected to a locking member for fixing the headrest, and the other end of the operation cable is connected to the reclining mechanism, and the other end of the operation cable is connected when the seat back is tilted forward. A vehicle seat device has been proposed in which the lock member is driven in the unlocking direction by pulling (see Patent Document 1).

JP-A-10-297332

In the vehicle seat device described in Patent Document 1 described above, other end of the operation cable is connected to the reclining mechanism, and one end of the operating cable is connected to the locking member in the headrest. Therefore, when the headrest is attached to the upper part of the seat back, the operation of routing the operation cable and the operation of connecting both ends of the operation cable to the reclining mechanism and the lock member are very complicated. Further, since the lock member and the reclining mechanism are connected by the operation cable, there is an inconvenience that the headrest cannot be removed from the upper part of the seat back after the head rest is once attached to the seat back.

  Therefore, the present invention provides a vehicle seat device including a lock mechanism for fixing a headrest at a use position and a lock release mechanism for releasing a lock state by the lock mechanism. It is an object of the present invention to provide a vehicle seat device that can be easily removed.

According to a first aspect of the present invention, there is provided a lock mechanism for fixing a headrest detachably mounted on an upper portion of a seat back at a use position, and a lock for releasing a lock state by the lock mechanism. A release mechanism, and when the locked state by the lock mechanism is released , the portion of the headrest excluding the attachment portion to the seat back is configured to be rotatable in at least one of the front and the rear. A vehicle seat device comprising:
The lock mechanism includes a lock member that is attached to a rotation shaft of the headrest, and an engagement member that is on the attachment portion side of the headrest to the seat back and engages with the lock member.
The unlocking mechanism has one end connected to the engaging member, the other end extending in the seat back direction, and a passive rod inserted into a sleeve fixed to a seat back mounting portion of the headrest; By projecting from the upper part of the seat back toward the inside of the sleeve on the seat back side, the other end of the passive rod is pushed and the engagement member is released from the state engaged with the lock member. A vehicle seat device comprising an actuating rod to be actuated.
According to the first aspect of the present invention, the operating rod protrudes from the upper part of the seat back, so that the locked state of the headrest by the lock mechanism can be released. Therefore, there is no need to connect the headrest side having the lock mechanism and the seat back side having the lock release mechanism by an operation cable or the like, and the lock mechanism on the headrest side and the lock release mechanism on the seat back side are separated from each other. Is possible. This ensures that the mechanisms of these headrests side and the seat back side because it is not connected by operating cable or the like, the headrest of the assembly work and detaching work on top of the seat back is very easy.

In a second aspect of the present invention based on claim 1,
The unlocking mechanism includes an operation cable whose one end is pulled in conjunction with a forward tilting operation of the seat back, and the operating rod is connected to the other end of the operation cable via a link member. The operation cable is configured to protrude from an upper portion of the seat back by pulling one end of the operation cable, and the operation cable is connected to a connecting portion between the other end of the operation cable and the link member. The vehicle seat device is provided with a play allowance that allows the operation rod to be pulled beyond a required operation amount .
According to the second aspect of the invention, the unlocking mechanism can be configured by the passive rod, the actuating rod , the link member, and the operation cable. Therefore, it is possible to simply configure the lock release mechanism. Further, according to the second aspect of the present invention, it is possible to simultaneously release the locked state by the lock mechanism by a one-stage operation of the forward movement of the seat back. In addition, since the connecting portion between the other end of the operation cable and the link member is provided with play allowance, even after the locked state by the locking mechanism is released by the forward operation of the seat back, the seat back can still be moved forward. As a result, even if the operation cable is pulled, its forward movement can be allowed by play.

According to a third aspect of the invention, in the first or second aspect of the invention, the headrest includes a biasing spring that biases the headrest in a direction in which the headrest is rotated forward. It is a sheet device.
According to the third aspect of the invention, when the lock state by the lock mechanism is released, the headrest is biased in the direction of rotating forward by the biasing spring. Therefore, it is possible not only to release the locked state by the lock mechanism at the same time, but also to automatically rotate the headrest toward the front by a one-step operation of the seat back forward operation. It becomes.

  According to the present invention, in a vehicle seat device including a lock mechanism for fixing a headrest at a use position and a lock release mechanism for releasing a lock state by the lock mechanism, an assembly operation of the headrest with respect to a seat back It is possible to provide a vehicular seat device that is extremely easy to remove and remove.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an appearance of a vehicle seat device 10 according to the present embodiment. As shown in FIG. 1, the vehicle seat device 10 according to the present embodiment includes a seat cushion 70 that is disposed on the floor of the vehicle so that an occupant can sit there. A seat back 50 is attached to the rear portion of the seat cushion 70 so that the occupant holds the back. The seat back 50 can be tilted forward and backward by a reclining mechanism 71. A headrest 30 is mounted on the upper portion of the seat back 50 so that an occupant holds the head.

First, the structure of the headrest 30 will be described. FIG. 2 is an exploded perspective view of the headrest 30. FIG. 3 is a side view of the headrest 30 and shows a state inside the headrest 30.
As shown in FIGS. 2 and 3, the headrest 30 is attached to a stay 32 for mounting the headrest 30 on the upper portion of the seat back 50, and to the stay 32 so as to be rotatable via the rotation shaft 20. The insert stay 33 is provided.
The stay 32 is integrally formed with a pair of left and right vertical axis parts 32b and a horizontal axis part 32a that connects the upper ends of the pair of vertical axis parts 32b, and is formed in a substantially inverted U-shape. As the stay 32, a metal pipe material or the like can be used. A pair of bearing brackets 34 a and 34 b are provided on the horizontal shaft portion 32 a of the stay 32 at a predetermined interval. Bearing holes 35a and 35b are formed in the pair of bearing brackets 34a and 34b, respectively. After both ends of the rotating shaft 20 are inserted into the bearing holes 35a and 35b, fixing rings 36a and 36b are attached to the rotating shaft 20, respectively. The fixing rings 36a and 36b are thin ring-shaped metal fittings, and prevent the rotating shaft 20 inserted through the bearing holes 35a and 35b from coming off in the axial direction. The hole diameters of the bearing holes 35a and 35b are slightly larger than the shaft diameter of the rotation shaft 20, and the rotation shaft 20 is freely rotatable when inserted into the bearing holes 35a and 35b. A first biasing spring 37 wound in a coil shape is mounted around the rotation shaft 20 so as to be positioned on the same axis. One end of the first urging spring 37 is hung on the horizontal shaft portion 32 a of the stay 32, and the other end of the first urging spring 37 is hung on the lower end portion 33 a of the insert stay 33. The insert stay 33 is urged by the elastic force of the urging spring in a direction to rotate forward about the rotation shaft 20.

  The insert stay 33 is a member that is formed in a substantially rectangular and annular shape, for example, from a metal pipe material or the like, and is disposed inside the headrest 30 as a core. The insert stay 33 is covered with a cushion body 31 made of, for example, a pad body such as urethane foam and a skin material, and the cushion body 31 enhances the shock absorbing performance and fit to the occupant's head. Yes. Hinge members 38a and 38b are attached to the lower end 33a of the insert stay 33 as a pair of left and right. Hinge holes 39a and 39b are formed in the pair of hinge members 38a and 38b, respectively. After both ends of the rotating shaft 20 are inserted into the hinge holes 39a and 39b, fixing rings 41a and 41b are attached to the rotating shaft 20, respectively. The fixing rings 41a and 41b prevent the pivot shaft 20 inserted through the hinge holes 39a and 39b from coming off in the axial direction. The hole diameters of the hinge holes 39a and 39b are formed to be substantially equal to the shaft diameter of the rotation shaft 20, and the rotation shaft 20 is fixed so as not to be rotatable with respect to the hinge members 38a and 38b. Has been.

As shown in FIGS. 2 and 3, a lock mechanism 40 is provided inside the headrest 30 to fix the headrest 30 in a standing use position. The lock mechanism 40 is a substantially disc-shaped lock plate 42 that is mounted around the rotation shaft 20 and a substantially L-shape that is rotatably attached to a lower portion of the bearing bracket 34b by a pin 44. The engagement hook 43 is used. A second urging spring 45 wound in a coil shape is attached around the axis of the pin 44. One end of the second urging spring 45 is hung on the bearing bracket 34 b, and the other end of the second urging spring 45 is hung on the engagement hook 43. Due to the elastic force of the second urging spring 45, the engagement hook 43 is urged in a direction to engage with the lock plate 42. An engagement groove 42a is formed in a concave shape on the outer periphery of the lock plate 42, and an engagement claw 43a formed in a convex shape at the tip of the engagement hook 43 is fitted into the engagement groove 42a. Match. At the end of the engaging hook 43 opposite to the engaging claw 43a, a passive rod 46 for receiving an operating rod 62 protruding upward by a lock release mechanism 60 described later can be rotated via a pin 47. It is connected to. The passive rod 46 is inserted into a first sleeve 48 formed in a substantially cylindrical shape with synthetic resin and disposed so as to open toward the lower portion of the headrest 30 in a vertically movable state. . The first sleeve 48 is inserted into an insertion hole 49a provided in a positioning bracket 49 attached to the longitudinal axis portion 32b of the stay 32, and is positioned so that the axis does not shake. . In the present embodiment, the lock plate 42 corresponds to a “lock member” in the present invention. The engagement hook 43 corresponds to the “engagement member” in the present invention. The stay 32 and the one integrated therewith correspond to the “attachment portion to the seat back” in the present invention, and the insert stay 33 and one integrated therewith are the “attachment portion to the seat back” in the present invention. It corresponds to “the part excluding”.

Next, the structure of the seat back 50 will be described. FIG. 4 is an exploded perspective view of the seat back 50. FIG. 5 is a front view of the seat back 50 and shows a state inside the seat back 50.
4 and 5, the seat back 50 includes a right vertical frame 52a, a left vertical frame 52b, and an upper frame 53 positioned between upper ends of the left and right vertical frames 52a and 52b. A back base plate 54 located on the back side of these three frames is disposed. A pair of stay insertion members 51a and 51b formed in a rectangular tube shape by a metal hollow material or the like are attached to the upper frame 53 with a predetermined interval. The longitudinal axis portion 32b of the stay 32 is inserted into the pair of stay insertion members 51a and 51b from above via a headrest support (not shown). Thereby, the headrest 30 is attached to the upper part of the seat back 50. A second sleeve 57 formed in a substantially cylindrical shape with a synthetic resin is attached to a substantially central portion of the upper frame 53 via a bracket 57a. Inside the second sleeve 57, an operating rod 62 protruding above the seat back 50 is inserted in a state in which it can move up and down by an unlocking mechanism 60 described later.

  As shown in FIG. 4, a part of the back base plate 54 is further recessed in a stepped shape toward the back side, and a storage chamber 61 for storing the unlocking mechanism 60 is formed. In the storage chamber 61, various components for configuring the lock release mechanism 60, that is, the operation rod 62, the operation cable 63, and the link arm 64 are stored.

The actuating rod 62 is a steel member formed in a substantially cylindrical shape, and is inserted into the sleeve 57 so as to be vertically movable. A connecting hole 62a is provided at the lower end of the actuating rod 62, and a connecting pin 64a provided on the link arm 64 is inserted into the connecting hole 62a and is fixed to the connecting pin 64a. A ring 64b is attached. As a result, the actuating rod 62 and the link arm 64 are connected in a rotatable state via the connecting pin 64a. The actuating rod 62, Ri member der for actuating in a direction out of the engagement with engagement hook 43 to lock plate 42, in this embodiment, actuating rod 62 is formed in a substantially cylindrical shape However, the present invention is not limited to such an embodiment. For example, the actuating rod 62 may be formed of a prismatic member.

  The link arm 64 is a steel member formed in a long shape. A link shaft 64f for mounting the link arm 64 is attached to the back base plate 54 via a bracket 64e. After the link shaft 64f is inserted into the center hole 64c formed in the substantially central portion of the link arm 64, the fixing ring 64g is attached to the link shaft 64f. Thereby, the link arm 64 is pivotally attached to the rear base plate 54 so as to be rotatable. A third biasing spring 65 wound in a coil shape is mounted around the link shaft 64f so as to be positioned on the same axis, and one end of the third biasing spring 65 is connected to the link arm. 64 and the other end of the third urging spring 65 is hung on the bracket 64e. By the elastic force of the third urging spring 65, the link arm 64 is urged in the direction in which the operating rod 62 is operated to the unlocking side, that is, in the direction in which the operating rod 62 is pulled down. The link arm 64 corresponds to the “link member” in the present invention.

The operation cable 63 includes a steel wire cable 63a and a synthetic resin-made outer tube 63b that covers the outer surface of the wire cable 63a. The operation cable 63 is attached to the rear base plate 54 via two brackets 63c and 63d.
A first connecting member 63e formed in a short rod shape by a synthetic resin is attached to the upper end portion of the operation cable 63, and the first connecting member 63e is a long hole 64d formed in the link arm 64. After the insertion, the fixing ring 63g is attached to the first connecting member 63e. Thereby, the upper end portion of the operation cable 63 is connected to the long hole 64 d formed in the link arm 64. The first connecting member 63e is movable inside the long hole 64d, and is pulled in the direction toward the center hole 64c of the link arm 64 by the elastic force of the tension spring 66 inside the long hole 64d. It has become. In addition, a second connecting member 63f formed in a short rod shape with a synthetic resin is attached to the lower end portion of the operation cable 63. The second connecting member 63f is connected to a connecting portion 74a of a connecting bracket 74 attached to a left frame 73 disposed in the seat cushion 70.

As described above, the lock mechanism 40 for fixing the headrest 30 in the upright use position is configured by the lock plate 42 and the engagement hook 43 disposed inside the headrest 30. Further, the lock mechanism 40 is locked by the passive rod 46 disposed inside the headrest 30, the actuating rod 62 disposed inside the seat back 50, the link arm 64, and the operation cable 63. A lock release mechanism 60 for releasing is configured. Hereinafter, specific operations of the lock mechanism 40 and the lock release mechanism 60 will be described.

  6 and 7 are side views of the vehicle seat device 10, and FIG. 6 shows a state in which the seat back 50 stands up. FIG. 7 shows the seat back 50 forward with the reclining shaft 72 as a rotation center. Shows the state of being defeated. As shown in FIGS. 6 and 7, by operating the seat back 50 forward, a bracket 63d that fixes the lower end of the outer tube 63b and a connecting bracket 74 that is connected to the lower end of the wire cable 63a. As a result, the wire cable 63a is drawn downward from the lower end of the outer tube 63b.

8 and 9 show states of the lock release mechanism 60 and the lock mechanism 40 when the wire cable 63a (operation cable 63) is pulled downward.
As shown in FIG. 8, when the wire cable 63a is pulled downward, the link arm 64 connected to the upper end of the wire cable 63a is rotated clockwise (in FIG. The actuating rod 62 connected to the link arm 64 via the connecting pin 64a is projected at the upper portion of the seat back 50. A headrest 30 is mounted on the upper portion of the seat back 50, and the lower end surface of the lock mechanism 40 for fixing the headrest 30 at the use position is made to abut on the upper end surface of the operating rod 62. A passive rod 46 is provided.

  As shown in FIG. 9, when the actuation rod 62 protrudes upward, the passive rod 46 moves upward so as to be pushed up by the actuation rod 62. When the passive rod 46 moves upward, the engagement hook 43 connected to the upper end portion of the passive rod 46 via the pin 47 is counterclockwise as viewed from the side with respect to the pin 44 (counterclockwise in FIG. 9). Rotate clockwise. When the engagement hook 43 is rotated in the counterclockwise direction, the engagement claw 43a of the engagement hook 43 is released from the state of being fitted in the engagement groove 42a of the lock plate 42 (unlocking). As a result, the lock plate 42 is released from the non-rotatable state, and the insert stay 33 disposed inside the headrest 30 can be rotated forward about the rotation shaft 20 as a rotation center. Become. Since the insert stay 33 is always urged by the first urging spring 37 in the direction of rotating forward, the lock state by the lock mechanism 40 is thus released, so that the insert stay 33 is moved to the cushion body 31. And automatically rotate forward.

  As shown in FIG. 8, a first connecting member 63e is attached to the upper end portion of the wire cable 63a. The first connecting member 63e is inserted into a long hole 64d formed in the link arm 64. In this state, the tension spring 66 pulls the link arm 64 toward the center hole 64c. When the seat back 50 is tilted further forward from the state shown in FIG. 7, the wire cable 63a is further pulled downward from the state shown in FIG. By allowing the member 63e to move downward within the elongated hole 64d, an allowance for allowing the wire cable 63a to be pulled further downward is secured.

  According to the vehicle seat device 10 configured as described above, the engagement hook 43 is operated in a direction away from the state in which the engagement hook 43 is engaged with the lock plate 42 by the operation rod 62 protruding above the seat back 50. (Unlock operation). Therefore, it is not necessary to directly connect the operation cable 63 to the engagement hook 43, in other words, it is not necessary to connect the lock mechanism 40 and the lock release mechanism 60 by the operation cable 63. Therefore, even after the vehicle seat device 10 is completed, the lock mechanism 40 and the lock release mechanism 60 can be separated from each other, and the headrest 30 and the seat back 50 can be separated from each other. . In this case, the operation work of the operation cable 63 when the headrest 30 is attached to the seat back 50 becomes unnecessary. Further, the operation of removing the operation cable 63 when removing the headrest 30 from the seat back 50 is not required.

  According to the vehicle seat device 10 according to the present embodiment, the operating rod 62 protrudes upward in conjunction with the forward tilting operation of the seat back 50 and is engaged by the operating rod 62. The state in which the hook 43 is engaged with the lock plate 42 (the locked state) is released. Further, the headrest 30 is automatically rotated forward by the first biasing spring 37. Therefore, not only can the locked state of the lock mechanism 40 be released by a one-step operation of the seatback 50 being moved forward, but the headrest 30 can be automatically rotated forward, which is convenient.

The vehicle seat according to the present invention can be applied to various types of vehicle seat devices. For example, the rear part of the seat cushion is supported so that it can be flipped up around the front part of the seat cushion connected to the floor part of the vehicle body by a hinge part, and the seat back is supported by the reclining mechanism fixed to the floor part of the vehicle body. The present invention can be applied to a vehicle seat device that is supported so as to fall down. In this case, after the seat cushion is flipped forward, the headrest is prevented from interfering with the seat cushion when the seat back is tilted forward.
The present invention is also applicable to a vehicle seat device in which the seat cushion is not supported so as to be able to be flipped forward. In this case, it is possible to prevent the headrest from interfering with the back surface of the seat back of the front seat when the seat back is tilted forward.

The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the scope of the invention.
In the said embodiment, although the example which applied this invention with respect to the vehicle seat apparatus 10 of the type which the headrest 30 rotates ahead centering on the rotating shaft 20 was shown, it is limited to such an aspect. It is not a thing. For example, the present invention can be applied to a vehicular seat device in which the headrest 30 rotates backward about the rotation shaft 20.

  In the above embodiment, the example in which the present invention is applied to the vehicle seat device 10 of the type in which the link arm 64 and the left frame 73 of the seat cushion 70 are connected by the operation cable 63 has been shown. It is not limited to such an aspect. For example, the present invention is also applied to a vehicle seat device of a type in which the link arm 64 and the left frame 73 of the seat cushion 70 are connected by an elongated bar such as metal, instead of using the operation cable 63. Can be applied.

The present invention provides a vehicle seat device in which a lock mechanism for fixing a headrest at a predetermined use position and a lock release mechanism for releasing a lock state by the lock mechanism are not connected by an operation cable or the like. Any vehicle seat device can be included.
For example, sensors (or switches) that can output a radio signal by detecting a forward tilting operation of the seat back are built in the reclining mechanism. Then, our Ku by arranging a drive device such as an electromagnetic solenoid that can project the actuation rod upwardly at the timing of receiving the radio signals from the sensors in the seat back. If as this, it is possible to release the locked state by the lock mechanism in conjunction with before tilting operation of the seat back. Even in this case, it is not necessary to connect the lock mechanism and the lock release mechanism with an operation cable or the like, so the headrest and the seat back can be separated, and when the headrest is attached to the seat back, The work at the time of removing and removing becomes extremely easy.

It is a perspective view which shows the external appearance of the vehicle seat apparatus. It is a disassembled perspective view of a headrest. It is a side view of a headrest and has shown the state inside a headrest. It is a disassembled perspective view of a seat back. It is a front view of a seat back and shows the state inside a seat back. It is a side view of a vehicle seat device and shows a state where a seat back stands up. It is a side view of a vehicle seat device and shows a state in which a seat back is tilted forward with a reclining shaft as a rotation center. It is a figure which shows the state of the lock release mechanism when a wire cable is pulled below. It is a figure which shows the state of the lock mechanism when a wire cable is pulled below.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle seat apparatus 20 Rotating shaft 30 Headrest 32 Stay 37 1st biasing spring 40 Lock mechanism 42 Lock plate (lock member)
43 Engagement hook (engagement member)
46 Passive rod 50 Seat back 54 Back base plate 60 Unlocking mechanism 62 Actuating rod (actuating member)
63 Operation cable 64 Link arm 70 Seat cushion

Claims (3)

A lock mechanism for fixing a headrest detachably mounted on an upper portion of a seat back at a use position; and a lock release mechanism for releasing a lock state by the lock mechanism, wherein the lock state by the lock mechanism is It is a vehicle seat device configured so that the portion excluding the attachment portion to the seat back of the headrest can be rotated in at least one of the front and rear by being released,
The lock mechanism includes a lock member that is attached to a rotation shaft of the headrest, and an engagement member that is on the attachment portion side of the headrest to the seat back and engages with the lock member.
The unlocking mechanism has one end connected to the engaging member, the other end extending in the seat back direction, and a passive rod inserted into a sleeve fixed to a seat back mounting portion of the headrest; By projecting from the upper part of the seat back toward the inside of the sleeve on the seat back side, the other end of the passive rod is pushed and the engagement member is released from the state engaged with the lock member. A vehicle seat device comprising an actuating rod to be actuated. The vehicle seat device according to claim 1,
The unlocking mechanism includes an operation cable whose one end is pulled in conjunction with a forward tilting operation of the seat back, and the operating rod is connected to the other end of the operation cable via a link member. The operation cable is configured to protrude from an upper portion of the seat back by pulling one end of the operation cable, and the operation cable is connected to a connecting portion between the other end of the operation cable and the link member. A vehicle seat device characterized in that a play allowance is provided that allows the operating rod to be pulled beyond a required operating amount . The vehicle seat device according to claim 1 or 2,
The vehicle seat device according to claim 1, wherein the headrest includes a biasing spring that biases the headrest in a direction in which the headrest is rotated forward.

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