Power recliner

#This application claims the priority of Korean Patent Application No. 10-2020-0129650 filed on Oct. 7, 2020 and Korean Patent Application No. 10-2020-0149175 filed on Nov. 10, 2020, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

#The present disclosure relates to a power recliner, and more particularly, to a power recliner in which a support groove is formed in an accommodation groove of an internal gear, and wedges are installed and inserted into the support groove so as to be moved along the support groove, such that when a load is applied, one side of the wedges is dually in contact with a cam and an inner sidewall surface of the support groove or dually in contact with a burring part of the internal gear and the inner sidewall surface of the support groove to disperse the load applied to the recliner, thereby improving maximum strength of the recliner.

#In general, a recliner enables an angle in a forward-rearward direction of a seatback to be adjusted with respect to a seat cushion. The recliner has a high coupling force between components during a reclining operation to ensure safety of a passenger. The recliners are classified into a manual-type recliner, of which the angle of the seatback is adjusted as a passenger manipulates a lever, and a power-type recliner which is automatically operated by power of a motor through manipulation of a switch.

#The above and other aspects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

#FIG. 1 is an exemplified view illustrating a configuration of a power recliner having a cam according to the present disclosure;

#FIG. 2 is another exemplified view illustrating a configuration of the power recliner having the cam according to the present disclosure;

#The present disclosure provides a power recliner including a seatback having an angle that is adjusted when an external gear coupled to an accommodation groove of an internal gear is eccentrically rotated as wedges are operated by a rotation of a lever socket, in which a support groove having a depth difference is formed in the accommodation groove of the internal gear and maintains a predetermined radius based on a burring part, in which one side of the wedges are installed and inserted into the support groove so as to be moved along the support groove, and in which when a load is applied to a seatback, the wedges are dually in contact with a cam and an inner sidewall surface of the support groove or dually in contact with the burring part of the internal gear and the inner sidewall surface of the support groove to disperse the load.

#That is, the present disclosure provides a power recliner in which an external gear having one side engaging with an internal gear is rotated as a wedge and a cam are rotated by a lever socket or a power recliner in which an external gear having one side engaging with an internal gear is rotated as a wedge is rotated by a lever socket. A support groove having a depth difference is formed in an inner surface of an accommodation groove of the internal gear that accommodates the external gear, and one side of the wedges is installed and inserted into the support groove so that the wedges move along the support groove. When a load is applied to a seatback, the wedges are dually in contact with a cam and an inner sidewall surface of the support groove or dually in contact with a burring part of the internal gear and the inner sidewall surface of the support groove. Therefore, the load (external force) transmitted to the wedges are simultaneously transmitted to the burring part of the internal gear and the inner sidewall surface of the support groove, such that the load is dispersed, the dispersion of the load improves the maximum strength of the recliner.

#As illustrated in FIGS. 1 to 11, the present disclosure may be applied to all power recliners 100 each including a cam 30, wedges 20, a wedge spring 60, an internal gear 40 having a burring part 42, an external gear 50 having a press-fitted bearing 51, and a lever socket 10. Alternatively, as illustrated in FIGS. 12 to 15, the present disclosure may be applied to all power recliners 100′ each including wedges 20, a wedge spring 60, an internal gear 40 having a burring part 42, an external gear 50 having a press-fitted bearing 51, and a lever socket 10. Therefore, the present disclosure is not limited to the configuration of the power recliner.