KR101078775B1 - Vehicle folding seat - Google Patents

Abstract

       The present invention relates to a folding seat for a vehicle, wherein a cross section of a contact surface of a locking gear and a sector gear included in a recliner constituting the folding seat for a vehicle is mutually spaced apart from a rotation axis of the locking gear by a predetermined distance. And the heights of the locking gear and the sector gear become larger as they move away from the rotation axis of the locking gear.

       According to the present invention, the tooth having the arc-shaped cross section does not generate a force in the direction of releasing the locking gear when a load is applied by a forward or rearward collision so that deformation or breakage of other parts around it can be eliminated. As a result, the total engagement between the locking gear and the sector gear can be maintained even if the locking gear rotates partially due to the load.

Description

 Vehicle folding seat {Vehicle folding seat}

 1a and 1b is an operating state diagram of the vehicle folding seat,

 2a to 2c is a structure and operation state diagram of a vehicle recliner,

 3 is a front view showing teeth of a conventional locking gear and a sector gear,

 4 is a front view of the recliner according to the first embodiment of the present invention,

 5 is a front view of a recliner according to a second embodiment of the present invention;

6 is a front view of a recliner according to a third embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: recliner 11: lever

12: Locking Cam 20: Seat Back

13: Locking Gear 14: Sector Gear

 The present invention relates to a vehicle folding seat, and more particularly, to a vehicle that can prevent damage and deformation during load action such as a collision by improving the teeth of the locking gear and the sector gear constituting the recliner included in the vehicle folding seat. Relates to a folding seat.

As shown in FIGS. 1A and 1B, the vehicle folding seat folds the seat back constituting the seat forward to be interviewed with the seat cushion to secure a loading space in the vehicle, or to ride the rear passengers of a vehicle without a rear door. It is an apparatus which can be made easy.

As shown in Figures 2a to 2c, the conventional recliner 10 is a locking cam 113, a sector gear 114 and a locking cam for preventing the departure of the gear to adjust the angle of the seat back 20 112, the actuating lever 11 and the like.

The locking gear 113 is rotatably fixed to the seat back 20 so that when the seating member operates the lever 11 so that the locking cam 112 releases the locking gear 113, the seat back 20 is seat frame 41. It is folded to be able to contact the seat cushion 42 by rotating forward around the hinge point of the sector gear 114 fixed to the ().

However, in the conventional recliner, as shown in FIG. 3, the sector gear 114 and the locking gear 113 have a general gear shape, and thus, most of the load due to the inertia of the passenger during the front collision or the rear collision of the vehicle. When applied to the seat back 20 through the seat belt, the force is applied in a direction perpendicular to the contact surface of the teeth of the locking gear 113 fixed to the folding device and the sector gear 114 being interviewed thereto (131 in FIG. 3). Will be added. This load is divided into the component force in the rotational direction of the locking gear 113 (132 in FIG. 3) and the component force in the rotational center direction (133 in FIG. 3). The component force in the rotational direction of the locking gear releases the locking gear 113. Acting in the direction to apply a load to the locking cam 112, if the locking cam 112 does not firmly support the seat back, it transmits the load to the surrounding structure, causing deformation or breakage, and ultimately serious There was a problem of injuries.

Accordingly, the present invention provides a vehicle folding apparatus having a recliner which improves the shape of the cross section of the contact surface where the teeth of the rocking gear and the teeth of the sector are in contact with each other, thereby preventing the force of the rocking gear in the direction of release of the rocking gear during a load due to a collision or the like. An object is to provide a sheet.

       In order to achieve the above object, the present invention, in the configuration of a folding seat for a vehicle, the teeth of the locking gear has a concentric circular arc-shaped cross section of the contact surface in contact with the sector gear spaced apart from the rotation axis by a predetermined distance, the sector The tooth of the gear is characterized by having an arc-shaped cross section in contact with the contact surface of the locking gear.

       In addition, the height of the locking gear and the sector gear is formed so as to move away from the axis of rotation to increase the contact area between the locking gear and the sector gear, so that even if the locking gear rotates in part, the entire teeth can be maintained.

       Prior to the description, in various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, only the configuration different from the first embodiment will be described. do.

       Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.                     

       First embodiment

       As shown in FIGS. 1A and 1B, the vehicle folding seat is fixed to a seat frame 41 for fixing the seat to the vehicle body, a seat cushion 42 and a seat back 20 for seating the passenger, and the seat frame 41. And the seat back 20 includes a recliner 10 which rotates forward to interview the seat cushion 42.

       As shown in FIG. 2A, the recliner 10 is rotatably coupled to the rotation shaft 43 and the rotation shaft 43 provided on the side of the seat back 20 or the seat frame 41, and at least one tooth ( a locking gear 13 having a tooth, a sector gear 14 having a tooth fixed to the side of the seat frame or the seat back and engaging with the locking gear 13, and the seat back 20 forward A locking cam 12 which performs a function of fixing the engagement of the locking gear 13 and the sector gear 14 in a state of being folded and interviewed with the seat cushion 42 or seated backwards, and the locking cam 12 And a lever 11 fixed to the coupling member to engage or release the locking gear 13 and the sector gear 14 by rotating the locking cam 12.

       4 is a view showing the engagement between the locking gear 13 and the sector gear 14 of the recliner 10 in a state where the seat back 20 is turned back. The locking cam 12 is fixed to the locking gear 13 and the sector gear 14 meshed with each other so that the locking gear 13 is fixed so that the locking gear 13 is not released.

       Here, the teeth of the locking gear 13 are interviewed with the sector gear 14 and are formed on the opposite side of the first contact surface 21 facing the rotation axis 43 of the locking gear 13 to be interviewed with the sector gear 14. It is formed of two contact surfaces 22. The cross section of the first contact surface 21 has a constant distance from the rotating shaft 43 of the locking gear 13 so that the load generated during the front collision does not act in the direction in which the locking gear 13 is released from the sector gear 14. It is formed in an arc shape along the circumferential direction of the spaced concentric circles, the teeth of the sector gear 14 meshed with the locking gear 13 is provided with a corresponding tooth shape to be engaged with the teeth of the locking gear (13).

       Here, the values of the locking gear 13 and the sector gear 14 engaged with the locking gear 13 may be one or more, and preferably formed of a plurality of teeth to increase the strength by distributing the load transmitted to the locking gear to each tooth. Good to do.

       With this configuration, the operation of the recliner according to the first embodiment of the present invention will be described. As shown in FIG. 4, in the case where the cross section of the first contact surface 21 is formed in an arc shape, the load transmitted through the seat back 20 during front collision is combined with the locking gear 13 engaged. It acts in a direction perpendicular to the first contact surface 21 of the sector gear 14. In this case, since the first contact surface 21 coincides with an arc of a concentric circle around the rotation axis of the locking gear, the component force in the direction in which the locking gear 13 is released from the sector gear 14 is not generated. Even when the load is applied, the locking gear 13 and the sector gear 14 are not released. Therefore, it is possible to prevent the deformation and damage of the peripheral parts due to the release of the locking gear (13).

       Second embodiment

       As shown in FIG. 5, the recliner 10 according to the second embodiment of the present invention has a cross section of the first contact surface 21 of the locking gear 13 and the first contact surface according to the first embodiment. In the recliner 10 in which the cross section of the contact surface of the sector gear 14 to be interviewed is arcuate, the cross section of the second contact surface located opposite to the first contact surface 21 of the locking gear 13 and the locking. The cross section of the teeth of the sector gear 14 in contact with the second contact surface of the gear 13 is formed to have an arc shape of concentric circles spaced apart from the rotational axis of the locking gear 13 by a constant distance.

       Here, the recliner is formed in a concentric circular arc shape centering on the rotating shaft 43 only the end surface of the second contact surface 22 of the locking gear 13 and the contact surface of the sector gear 14 in contact with the recliner. can do.

       According to this configuration, in the present invention, the load transmitted through the seat back 20 during the rear collision is the contact surface of the first contact surface 21 of the locking gear 13 engaged with the sector gear 14 in contact with it ( Acts in a direction perpendicular to the direction of FIG. In this case, since the second contact surface 21 coincides with an arc of a concentric circle centering on the rotational axis 43 of the locking gear, no force in the direction in which the locking gear 13 is released from the sector gear 14 is generated. Therefore, the locking gear 13 and the sector gear 14 are not released even when the load is applied by the rear collision. Accordingly, in the case of the recliner according to the second embodiment, the locking gear 13 is released by the load caused by the collision of the front or the rear to prevent deformation and damage of the peripheral parts.

       Third embodiment

       As shown in FIG. 6, the recliner 10 according to the third embodiment of the present invention interviews the end face of the first contact surface of the locking gear 13 and the first contact surface according to the first embodiment. The cross section of the recliner in which the contact surface of the sector gear has an arc shape, or the cross section of the second contact surface of the locking gear 13 and the contact surface of the sector gear in contact with the second contact surface in an arc shape according to the second embodiment. A recliner comprising a locking gear 13 and a sector gear 14 each having an arcuate cross section of the first and second contact surfaces 21 and 22, wherein the locking gear 13 And the tooth height of the sector gear 14 are increased so as to be farther from the rotation axis of the locking gear 13.

       In the locking gear 13 and the sector gear 14 having a plurality of teeth, when the tooth height of the teeth is constant, the locking cam 12 is not secured when the load is applied by the front or rear collision, so that the locking gear ( In the case where 13) rotates about the rotation shaft 43, the locking gear 13 and the sector gear 14 may be released in the case of a tooth separated from the rotation shaft 43 by a predetermined distance or more, in which case the load is not released. By focusing on the remaining values, the risk of breakage increases.

       However, in the case of the recliner according to the present invention, the height of the recliner increases as the distance from the rotation shaft increases, so that even if the locking gear 113 rotates partially, the locking gear 13 and the sector gear 14 located far from the rotation shaft 43 are rotated. Can be prevented from being released.

As described above, according to the present invention, since the component force for releasing the locking gear 113 does not occur during a front or rear collision, it is possible to prevent deformation or damage to other parts in the vicinity, and the height is increased as it moves away from the rotation axis. By making the locking gear 113 rotate at a predetermined angle, all the teeth of the locking gear 113 and the sector gear 114 can maintain engagement.

Claims (3)

  A locking gear rotatably coupled to one of the vehicle seat back and the seat frame and a locking gear rotatably coupled to the rotation shaft and having one or more teeth, and the locking gear coupled to the other of the seat frame and the seat back. And a sector gear having a tooth engaged with the tooth, a locking cam for maintaining the engagement of the locking gear and the sector gear, and a lever for engaging or releasing the locking gear and the sector gear by rotating the locking cam. In the vehicle folding seat comprising a recliner to   The teeth of the locking gear are interviewed with the sector gear, and the first contact surface has an arc-shaped cross section of the concentric circle spaced apart from the rotational axis and the concentric circle spaced apart from the rotational axis and positioned opposite to the first contact surface. A second contact surface having an arcuate cross section,         And the teeth of the sector gear have an arc-shaped cross section which is in contact with the first contact surface and the second contact surface of the locking gear, respectively. delete         The method of claim 1,         And the height of the locking gear and the sector gear increases as the distance between the locking gear and the sector gear increases.

Images