JP2018030519A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both restraints of increase of the number of components and occurrence of abnormal noise in configuration of a vehicle seat actuating a lock release mechanism which releases such a state that a seat body is locked to a vehicle body in accordance with a tilting motion in which a seat back in the seat body changes a seat back angle to a seat cushion.SOLUTION: An objective vehicle seat has: a turning operation member 50 fixed to a back frame 2f and capable of operating a change-over lever (a lock release mechanism) by configuring to integrally turn coaxially with the center around which a seat back 2 tilts; and a hinge bracket 60 fixed to a cushion frame 3f and pivotally supporting the turning operation member 50 by a cylindrical part 62 insertable in the turning center of the turning operation member 50.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat.

  Conventionally, as a vehicle seat that operates a lock release mechanism that releases a state in which the seat body is locked to the vehicle body, with a tilting operation in which the seat back in the seat body changes the backrest angle with respect to the seat cushion, For example, Patent Document 1 is known.

  Here, the vehicle seat in Patent Document 1 is a slide mechanism that supports the seat body slidably with respect to the vehicle body in accordance with a tilting operation in which the seat back in the seat body changes a backrest angle with respect to the seat cushion. This is a vehicle seat in which a walk-in mechanism for releasing the slide lock state is activated. The vehicle seat is provided with a recliner that adjusts the backrest angle of the seat back between the seat back and the seat cushion. An operation shaft for operating the recliner is inserted through the center of the recliner. A rotation center of an operation link that enables operation of the walk-in mechanism is inserted through the operation shaft. On the other hand, a bracket protrudes outward in the width direction from the skeleton of the seat back, and is engaged with one end of the operation link. As a result, the bracket is rotated in accordance with the tilting operation in which the seat back changes the backrest angle with respect to the seat cushion, and the operation link is pushed to operate the walk-in mechanism. Here, since the bracket and the operation link are separated from each other, a tension spring is interposed between the two members in order to prevent noise caused by rattling.

JP 2014-91391 A

  However, the vehicle seat in the above technology requires countermeasures against abnormal noise, and has three components, namely, an operation link, a bracket, and a tension spring. Have.

  The present invention was devised in view of such points, and the problem to be solved by the present invention is accompanied by a tilting operation in which the seat back in the seat body changes the backrest angle with respect to the seat cushion. In constructing the vehicle seat that operates the unlocking mechanism that releases the locked state of the seat main body with respect to the vehicle main body, both the suppression of the number of parts and the suppression of abnormal noise are achieved.

  In order to solve the above problems, the vehicle seat of the present invention takes the following means. First, the vehicle seat according to the first aspect of the invention releases the locked state of the seat body with respect to the vehicle body as the seat back of the seat body changes the backrest angle with respect to the seat cushion. A vehicle seat that operates a lock release mechanism that is fixed to the skeleton of the seat back and configured to rotate integrally on the same axis as the tilting center of the seat back. The rotation operation member that can operate the lock release mechanism, and the rotation operation member that is fixed to the skeleton of the seat cushion and that is inserted into the rotation center of the rotation operation member are pivotally supported. A hinge bracket.

  According to the first aspect of the invention, the rotation operation member is fixed to the skeleton of the seat back and is configured to be integrally rotated coaxially with the center at which the seat back is tilted to release the lock. It is the structure which can operate a mechanism. That is, since the rotation operation member is configured to be fixed to the skeleton of the seat back, it is possible to suppress noise such as rattling. Further, since the operation link and the bracket of the conventional structure are not separated but integrated, the number of parts can be suppressed. The hinge bracket is fixed to the skeleton of the seat cushion and pivotally supports the rotation operation member by a cylindrical portion that can be inserted into the rotation center of the rotation operation member. Therefore, the rotation operation member is supported by the skeleton of the seat cushion in addition to the skeleton of the seat back, and can be supported stably.

  Next, a second invention is a vehicle seat according to the first invention, wherein an inner peripheral surface of a cylindrical portion of the hinge bracket is inserted into a central portion of a recliner for adjusting a backrest angle of the seat back. It is configured as a bearing for the operation shaft.

  According to the second invention, the hinge bracket can also function as a bearing for the operation shaft in the recliner without increasing the number of parts. Here, in the configuration in which the operation shaft is supported as the rotation shaft of the rotation operation member as in the prior art, it is necessary to provide backlash for suppressing the backlash of both members. In this case, the operation shaft and the rotating operation member may be loosely restricted, and the operation shaft may be forcibly restricted in the radial direction, which may cause a deterioration in quality as an inherent lock function of the recliner. However, the hinge bracket in the above configuration is fixed to the skeleton side of the seat cushion. Therefore, the load of the rotation operation member is supported on the skeleton side of the seat cushion, and can be configured not to be input to the operation shaft of the recliner. Therefore, the lock function of the recliner is not impaired. Further, since the inner peripheral surface of the cylindrical portion of the hinge bracket is configured as a bearing for the operation shaft, the operation shaft can be supported more stably.

  Next, a third invention is a vehicle seat according to the first invention or the second invention, wherein the rotating operation member includes a washer inserted through a cylindrical portion of the hinge bracket, the washer, The movement in the axial direction is restricted by the weld between the cylindrical portions.

  According to the third aspect of the invention, the rotation operation member is restricted from moving in the axial direction by the washer inserted through the cylindrical portion of the hinge bracket and the welded portion between the washer and the cylindrical portion. As a result, it is possible to stably prevent the turning operation member from coming off in the axial direction.

  According to the present invention, the seat body in the seat body is released from the locked state with respect to the vehicle body in accordance with the tilting operation in which the seat back in the seat body changes the backrest angle with respect to the seat cushion. In configuring the vehicle seat that operates the unlocking mechanism, it is possible to achieve both suppression of the number of parts and suppression of abnormal noise.

1 is an overall perspective view showing an overview of a vehicle seat according to Embodiment 1. FIG. It is the disassembled perspective view which showed the attachment structure of the rotation operation member in a vehicle seat. It is sectional drawing which showed the attachment structure of the rotation operation member in a vehicle seat.

  Below, embodiment of this invention is described using FIGS. 1-3. In the present embodiment, a vehicle seat in a vehicle will be described as an example of a vehicle seat. Note that the directions indicated by the arrows in the drawings are the front-rear, left-right, and up-down directions as seen from the seated occupant when the seated occupant is seated on the vehicle seat. Each drawing mainly shows the internal structure of the seat body 1 in order to easily explain the configuration of the embodiment. Therefore, the seat back 2 and the seat cushion 3 are mainly illustrated with an internal framework structure such as the back frame 2f and the cushion frame 3f constituting the skeleton, and equipment such as an outer skin and a seat pad attached to the outside is omitted. doing.

  The vehicle seat in this embodiment illustrates what is arrange | positioned as a 2nd row | line seat of a vehicle. As illustrated in FIG. 1, the vehicle seat includes a seat back 2 that serves as a backrest portion that constitutes the seat body 1 and a seat cushion 3 that serves as a seating portion. The seat body 1 is connected to the seat cushion 3 by recliners 4 provided at both lower portions in the width direction of the seat back 2. Accordingly, the seat back 2 is configured to be able to adjust the backrest angle with respect to the seat cushion 3 or to be moved forward to the upper side of the seat cushion 3.

  The recliner 4 is normally held in a locked state in which the backrest angle of the seat back 2 is fixed. As shown in FIGS. 2 and 3, the recliner 4 has an operation shaft 4a inserted through the center thereof, and operates when the operation shaft 4a rotates around the axis. The lever 4L is fixed to an intermediate portion of the operation shaft 4a, and the cable 4 is pulled by a turning operation of a reclining lever (not shown) provided on the side of the seat cushion 3 to rotate the lever 4L. With that, it rotates around the axis. When the recliner 4 is operated, the above-described locked state is released, and the backrest angle of the seat back 2 can be adjusted and moved. Further, the recliner 4 is configured to release the above lock state all at once by operating a walking lever different from the reclining lever. For example, the walking lever is arranged on the back side of the seat back 2 and can be operated by a passenger in the rear seat. Here, the reclining lever and the walking lever are collectively referred to as an operation lever. In the recliner 4, the operation parts of the lock mechanisms are connected to each other by the pulling operation of the cable, and the switching of the lock and unlock is performed synchronously on the left and right. Therefore, by operating the operation lever, the seat back 2 is released from the locked state of the recliner 4 all at once, the fixed state of the backrest angle of the seat back 2 is released, and the seat back 2 is tilted forward toward the seat cushion 3.

  Here, a winding spring 2s is hung between the back frame 2f, which is the skeleton of the seat back 2, and the cushion frame 3f, which is the skeleton of the seat cushion 3. The inner diameter side end of the winding spring 2s is hung on an inner diameter side bracket 2fa that protrudes inward in the width direction from the back frame 2f and is fixed. An outer diameter side end portion of the winding spring 2s is hung on an outer diameter side bracket 3fa fixed in a protruding manner in the width direction from the cushion frame 3f. A damper 2d is engaged with the inner diameter side bracket 2fa adjacent to the winding spring 2s. The damper 2d causes the seat back 2 to tilt forward while attenuating the urging force of the winding spring 2s. The winding spring 2s is normally urged in the forward rotation direction. Therefore, the seat back 2 is automatically tilted forward by the urging of the winding spring 2s and falls to the seat cushion 3 side by operating the operation lever in a state where no occupant is seated on the seat body 1. Yes. The recliner 4 described above is normally biased in the operating direction that is locked, and is automatically returned to the locked state when the operation lever is turned. However, the recliner 4 is further provided with a lock zone that can be returned to the locked state by stopping the rotation of the operation lever, and a free zone that cannot be returned to the locked state even if the rotation of the operation lever is stopped.

  The former lock zone is usually set in an angular region that is used as a backrest by a passenger seated on the seat body 1. In other words, the lock zone is in an area between a pivot position where the seat back 2 is in an upright posture with respect to the seat cushion 3 and a pivot position where the seat back 2 is fully retracted. Is set. The latter free zone is set in an angular region where the passenger is not seated and used. In other words, the free zone is set in an area between a rotational position where the seat back 2 is in a standing posture and a rotational position where the seat back 2 is fully tilted forward and in a forward tilted posture. Has been. Accordingly, when the seat back 2 is moved forward, the operation lever is operated so that the seat back 2 is automatically tilted forward from the standing posture, and the seat back 2 is automatically operated even when the operation lever is stopped. It is put down and it becomes the posture of the front-down state. Here, the seat back 2 is held in a state of abutting against a stopper pin (not shown) provided on the seat cushion 3 side in the forwardly tilted state. On the other hand, when an operation of a lowering lever (not shown) provided on the seat body 1 is performed, the stopper pin is retracted. As a result, the seat back 2 is in a fallen state in which the seat back 2 is further fallen on the seat surface of the seat cushion 3 from the position of the forward fall state.

  As shown in FIG. 1, the seating position in the vehicle front-rear direction with respect to the floor surface F of the seat body 1 can be adjusted between the seat body 1 and a vehicle body constituent member (vehicle constituent member) such as the floor surface F. A slide rail 6 (slide mechanism) is disposed. A pair of left and right slide rails 6 are provided between the seat cushion 3 and the floor surface F. The slide rails 6 are located on both sides of the seat body 1 and are arranged in parallel with the vehicle longitudinal direction. The slide rail 6 mainly includes a lower rail 10, an upper rail 20, a slide lock mechanism 30, and a walk-in mechanism 40. Since the left and right slide rails 6 in the present embodiment are configured to perform the same operation in synchronization with the left and right, the right slide rail 6 will be described as a representative.

  The lower rail 10 is a long member extending in the vehicle front-rear direction, and is fixed on a vehicle body constituent member such as the floor surface F via a leg portion L. The lower rail 10 is integrally formed in the following cross-sectional shape by bending a flat plate member made of steel material in some places. The upper rails 20 are disposed on the seat body 1 side, and are fitted into the lower rail 10 so as to be slidable in the rail longitudinal direction. Thereby, the upper rail 20 supports the seat body 1 and moves the seating position of the seat body 1 in the vehicle front-rear direction along with the sliding movement.

  The slide lock mechanism 30 is a mechanism that can restrict or release the relative movement (slide movement) of the upper rail 20 with respect to the lower rail 10 at a predetermined relative position. In the slide lock mechanism 30, a lock claw (not shown) is elastically biased at substantially the center in the longitudinal direction. The claw of the lock claw penetrates the through-holes provided in the upper rail 20 and the lower rail 10 to make a slide lock state in which relative movement (slide movement) is restricted at a predetermined relative position. On the other hand, when the claw of the lock claw is retracted (disengaged) from the through-holes provided in the upper rail 20 and the lower rail 10, the upper rail 20 is in a slide lock release state in which the upper rail 20 can move relative to the lower rail 10 (slide movement). The lock claw can be operated by engaging with the loop handle 33. The loop handle 33 is formed in a U shape by appropriately bending and drawing a metal bar-like member. The tip of the loop handle 33 is inserted between the lower rail 10 and the upper rail 20 of the left and right slide rails 6. The tip of the loop handle 33 is inserted to a position where it engages with the lock claw.

  The walk-in mechanism 40 is set on the lower rail 10 side and the upper rail 20 side, and the slide lock state by the slide lock mechanism 30 is changed to the slide lock release state and the slide lock release state is maintained as the seat back 2 is moved forward. It is a mechanism to make. The walk-in mechanism 40 is a mechanism that operates in accordance with the forward tilting operation of the seat back 2 without operating the loop handle 33 in the slide lock mechanism 30. Although the detailed structure is omitted, the walk-in mechanism 40 has a switching lever 70 that is operated by a rotation operation member 50 described later, and slides when the cable is pulled as the switching lever 70 rotates. The lock claw of the lock mechanism 30 is operated, and the claw of the lock claw is retracted from the through-holes provided in the upper rail 20 and the lower rail 10 so that the slide lock is released. Further, the walk-in mechanism of the present embodiment has a lock release maintaining mechanism in order to maintain the slide lock release state.

  A rotation operation member 50 is provided on the seat back 2 side. On the seat cushion 3 side, a switching lever 70 that operates the walk-in mechanism 40 by being pivotally supported at a position engaged with the rotation operation member 50 is provided. Note that the walk-in mechanism 40 and the switching lever 70 are mechanisms that release the slide lock state of the slide rail 6 as a mechanism that releases the seat body 1 locked to the floor surface (vehicle body). Corresponds to “unlock mechanism”.

  As shown in FIGS. 2 and 3, the rotation operation member 50 is fixed to a back frame 2 f that is a skeleton of the seat back 2, and rotates integrally with the center on which the seat back 2 tilts. With this configuration, the switch lever 70 (lock release mechanism) that operates the walk-in mechanism 40 can be operated. The rotation operation member 50 is a flat plate member having a band plate shape in plan view, and a shaft hole 52 into which a cylindrical portion 62 of a hinge bracket 60 described later is inserted is provided at a substantially central portion. Further, the upper end edge of the rotation operation member 50 is connected and fixed to the back frame 2f by the arm portion 54 extending to the back frame 2f in an arc shape. On the lower side of the rotation operation member 50, there is a pushing portion 56 configured in a square shape protruding radially from the rotation center. When the seat back 2 rotates in accordance with the forward-turning operation from the standing state to the forward-down state, the pusher 56 rotates the switching lever 70 in one direction from the initial position, and the slide-in mechanism 40 slides the lock. This is a part for shifting the mechanism 30 from the slide lock state to the slide lock release state. Further, when the seat back 2 is rotated in accordance with the standing-up operation from the lying-down state or the lying-down state to the standing-up state, the pushing portion 56 rotates the switching lever 70 in the other direction from the initial position, The mechanism 40 is a part that causes the slide lock mechanism 30 to shift from the slide lock release state to the slide lock state. The rotation operation member 50 is restricted from moving in the axial direction by a washer inserted into the cylindrical portion 62 of the hinge bracket 60 and a welded portion between the washer and the cylindrical portion 62. The rotation operation member 50 is pivotally supported by the hinge bracket 60.

  The hinge bracket 60 is fixed to a cushion frame 3 f that is a skeleton of the seat cushion 3, and has a cylindrical portion 62 that can be inserted through the rotation center of the rotation operation member 50, and pivotally supports the rotation operation member 50. . Specifically, in the hinge bracket 60, the hat-shaped member 61 and the support bracket 64 are integrally formed by welding. The hat-shaped member 61 is a member in which a cylindrical portion 62 and a flat annular portion 63 are integrated on the outer periphery of the cylindrical portion 62. The support bracket 64 has a hole 65 through which the cylindrical portion 62 of the hat-shaped member 61 can be inserted, and an arc-shaped arm portion 66 that extends from a part of the edge to the cushion frame 3f. The hinge bracket 60 is welded in a state where the cylindrical portion 62 of the hat-shaped member 61 is inserted through the hole portion 65 of the support bracket 64, and is connected to the cushion frame 3 f by the arm portion 66. Thereby, the hinge bracket 60 is fixed to the cushion frame 3f with the cylindrical portion 62 protruding outward in the width direction. The cylindrical portion 62 is inserted through the shaft hole 52 of the rotation operation member 50 on the outer peripheral side. Moreover, the cylindrical part 62 is comprised as a bearing of the operating shaft 4a by the front-end | tip part of the operating shaft 4a being penetrated by the internal peripheral surface side.

  As a result, the rotation operation member 50 is coaxial with the operation shaft 4a that is the center of the seatback 2 that tilts with the tilting motion in which the seatback 2 in the seat body 1 changes the backrest angle with respect to the seat cushion 3. It becomes the structure which rotates integrally.

  Thus, according to the vehicle seat of the embodiment, the rotation operation member 50 is fixed to the back frame 2f that is the skeleton of the seat back 2, and is coaxially integrated with the center at which the seat back 2 tilts. It is the structure which enables operation of the walk-in mechanism 40 and the switching lever 70 (lock release mechanism) by being comprised so that it may rotate to (1). That is, since the rotation operation member 50 is configured to be fixed to the back frame 2f of the seat back 2, it is possible to suppress noise such as rattling. Further, since the operation link and the bracket of the conventional structure are not separated but integrated, the number of parts can be suppressed. The hinge bracket 60 is fixed to a cushion frame 3 f that is a skeleton of the seat cushion 3, and pivotally supports the rotation operation member 50 by a cylindrical portion 62 that can be inserted into the rotation center of the rotation operation member 50. Therefore, the rotation operation member 50 is supported by the cushion frame 3f of the seat cushion 3 in addition to the back frame 2f, and can be stably supported.

  Further, the hinge bracket 60 can also function as a bearing for the operation shaft 4a in the recliner 4 without increasing the number of parts. Here, in the configuration in which the operation shaft 4a is supported as the rotation shaft of the rotation operation member 50 as in the prior art, it is necessary to provide backlash for suppressing backlash between both members. If it does so, the radial limitation may arise in the operation shaft 4a by the influence of the backlash of the operation shaft 4a and the rotation operation member 50, and there is a concern that the quality of the lock function inherent in the recliner 4 may deteriorate. End up. However, the hinge bracket 60 in the above configuration is fixed to the cushion frame 3f side of the seat cushion 3. Therefore, the load of the rotation operation member 50 is supported on the cushion frame 3 f side of the seat cushion 3 and can be configured not to be input to the operation shaft 4 a of the recliner 4. Therefore, the lock function of the recliner 4 is not impaired. Further, since the inner peripheral surface of the cylindrical portion 62 of the hinge bracket 60 is configured as a bearing for the operation shaft 4a, the operation shaft 4a can be supported more stably.

  Further, the rotation operation member 50 is restricted from moving in the axial direction by a washer 68 inserted through the cylindrical portion 62 of the hinge bracket 60 and a welded portion between the washer 68 and the cylindrical portion 62. As a result, it is possible to stably prevent the turning operation member 50 from coming off in the axial direction.

  As mentioned above, although embodiment of this invention was described, the vehicle seat of this invention is not limited to embodiment, It can implement with other various forms.

  For example, the vehicle is not limited to a vehicle, and can be applied to various vehicles such as a ship and an aircraft.

  In the present embodiment, the walk-in mechanism (lock release mechanism) that releases the slide lock state of the slide rail (slide mechanism) that slidably supports the seat body 1 with respect to the floor surface F (vehicle body) is operated. However, the present invention is not limited to this. In other words, any mechanism may be used as long as the seat back in the seat body operates a lock release mechanism that releases the locked state of the seat body relative to the vehicle body in accordance with the tilting operation that changes the backrest angle with respect to the seat cushion. For example, the present invention may be applied to a so-called tumble mechanism unlock mechanism, or a so-called space-up mechanism unlock mechanism.

  Although the rotation operation member 50 has been described with respect to the configuration in which the washer 68 inserted through the cylindrical portion 62 of the hinge bracket 60 and the movement in the axial direction are restricted by the welded portion between the washer 68 and the cylindrical portion 62, Not limited. For example, the structure which the movement to the axial direction of a rotation operation member may be controlled with the nut screwed with the cylindrical part 62 of the hinge bracket 60 may be sufficient.

  The hinge bracket 60 has a two-member configuration including the hat-shaped member 61 and the support bracket 64, but may be an integral configuration.

  The cylindrical portion 62 of the hinge bracket 60 is shown as being configured as a bearing for the operation shaft 4a by inserting the tip of the operation shaft 4a on the inner peripheral surface, but is not limited thereto. For example, when the operation shaft 4a is not supported as a bearing, the rotation operation member may be supported as a solid column instead of the cylindrical portion 62.

  Various operation configurations of the walk-in mechanism by the rotation of the rotation operation member 50 can be applied. Here, in this embodiment, although the aspect which has a lock release maintenance mechanism in a walk-in mechanism was shown, it is not limited to this. For example, when the walk-in mechanism does not have the lock release maintaining mechanism and the rotation operation member 50 rotates the switching lever 70 and the cable is pulled, the slide lock mechanism 30 is set to the slide lock release state. When the engagement between the rotation operation member 50 and the switching lever 70 is released and the cable is not pulled, the slide lock mechanism 30 may be in a slide lock state.

DESCRIPTION OF SYMBOLS 1 Seat body 2 Seat back 2f Back frame 2fa Inner side bracket 2d Damper 2s Winding spring 3 Seat cushion 3f Cushion frame 3fa Outer side bracket 4 Recliner 4a Operation shaft 4L Lever 6 Slide rail (slide mechanism)
10 Lower rail 20 Upper rail 30 Slide lock mechanism 33 Loop handle 40 Walk-in mechanism (lock release mechanism)
50 Rotating operation member 52 Shaft hole 54 Arm portion 56 Pushing portion 60 Hinge bracket 61 Hat-shaped member 62 Cylindrical portion 63 Ring portion 64 Support bracket 65 Hole portion 66 Arm portion 68 Washer 70 Switching lever (lock release mechanism)
F Floor L Leg

Claims (3)

A vehicle seat that operates a lock release mechanism that releases a state in which the seat main body is locked with respect to the vehicle main body in accordance with a tilting operation in which the seat back in the seat main body changes a backrest angle with respect to the seat cushion. ,
A rotation operating member that is fixed to the skeleton of the seat back and that is configured to rotate integrally on the same axis as the tilting center of the seat back so that the lock release mechanism can be operated;
A vehicle seat having a hinge bracket fixed to the skeleton of the seat cushion and pivotally supporting the rotation operation member by a cylindrical portion that can be inserted into the rotation center of the rotation operation member. The vehicle seat according to claim 1,
A vehicle seat configured such that an inner peripheral surface of a cylindrical portion of the hinge bracket is configured as a bearing of an operation shaft that is inserted into a central portion of a recliner that adjusts a backrest angle of the seat back. The vehicle seat according to claim 1 or 2, wherein
The rotation operation member is a vehicle seat in which movement in the axial direction is restricted by a washer inserted into a cylindrical portion of the hinge bracket and a welded portion between the washer and the cylindrical portion.

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