Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
  • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
  • B60N2/235—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms
  • B60N2/2356—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls
  • B60N2/2362—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable by gear-pawl type mechanisms with internal pawls rotatably movable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
  • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
  • B60N2/20—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being tiltable, e.g. to permit easy access
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
  • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
  • B60N2/68—Seat frames
  • B60N2/682—Joining means

Definitions

• the present invention relates, in general, to seat recliners for vehicles and, more particularly, to a seat recliner having high strength for vehicles, which has an optimized size, and in which the shape of a seat back coupling part is improved.
• seat recliners for vehicles are devices that make it possible to adjust the angles of seat backs with respect to seat cushions within predetermined angular ranges.
• Such a seat recliner must be able to stably support a rider, even after the corresponding seat back has been rotated to a desired angle.
• the seat recliner must be designed such that no gap is defined between components of the seat recliner, to prevent the seat back from rattling.
• an object of the present invention is to provide a seat recliner having high strength which can stably support a seat back even though a relatively large rotating force is transmitted to the seat recliner through the seat back, and which enhances coupling force between the seat recliner and the seat back.
• the present invention provides a seat recliner for vehicles, including: a sector gear having a seat back coupling part on an outer surface thereof; a holder, rotatably coupled to the sector gear and having a seat cushion coupling part on an outer surface thereof; a cam, rotated and controlled by a shaft provided through the holder; a lock gear that is slid by compression of the cam to lock or unlock the sector gear to or from the holder; and a return spring supported at a first end thereof by the cam and supported at a second end thereof by the holder, thus elastically returning the cam
• the seat back coupling part includes: a main body protruding from the outer surface of the sector gear and having a predetermined diameter; and a plurality of coupling teeth provided on a circumferential outer edge of the main body at positions spaced apart from each other at predetermined intervals.
• the coupling teeth may comprise two or more kinds of coupling teeth having different sizes.
• the holder may include a spring seating part receiving the return spring therein, and a spring support part extending from the spring seating part and supporting the second end of the return spring.
• the seat cushion coupling part may comprise a plurality of protruding coupling parts provided on the outer surface of the holder at positions spaced apart from each other in a circumferential direction at predetermined angular intervals.
• the spring support part may be integrated with one of the plurality of protruding coupling parts.
• the holder may include a lock gear guide part to guide sliding movement of the lock gear
• the seat recliner may further include a compression spring interposed between the lock gear guide part and the lock gear and compressing the lock gear in a direction in which the sector gear is locked.
• the holder may include a spring seating part receiving the return spring therein, and the seat recliner may further include a thin plate ring interposed between the cam and the spring seating part and supporting the cam.
• the seat recliner for vehicles according to the present invention thanks to the structure in which a plurality of coupling teeth is provided on a seat back coupling part, even if a relatively large rotating force is applied to the seat recliner through a seat back, the seat recliner can stably support the seat back. In addition, the coupling force between the seat recliner and the seat back can be enhanced.
• the seat recliner for vehicles according to the present invention is constructed such that a spring support of a holder is integrated with part of a seat cushion coupling part, the manufacturability and strength of the holder can be enhanced.
• lock gear and the cam can always be smoothly operated in conjunction with each other in the same plane.
• FIG. 1 is a perspective view showing a mounting structure of a seat recliner for vehicles according to an embodiment of the present invention
• FIG. 2 is an exploded perspective view showing the mounting structure of the seat recliner for vehicles of FIG. 1;
• FIG. 3 is an exploded perspective view of the seat recliner for vehicles of FIG. 1;
• FIGS. 4 through 6 are a top perspective view, a bottom perspective view and a plan view, respectively, showing a sector gear, which is an element of the seat recliner for vehicles of FIG. 1 ;
• FIG. 7 is a plan view showing a holder, which is another element of the seat recliner for vehicles of FIG. 1 ;
• FIG. 8 is a plan view illustrating the assembled state of the seat recliner for vehicles of FIG. 1;
• FIG. 9 is a plan view and a side sectional view showing a conventional seat recliner for vehicles; and
• FIG. 10 is a plan view and a side sectional view showing the seat recliner for vehicles of FIG. 1.
• FIG. 1 is an exploded perspective view illustrating the coupling relationship between the mounting plates 10 and 20 and the seat recliner 100.
• a coupling hole 11 which receives therein a seat cushion coupling part 121 provided in a holder 120 of the seat recliner 100, which will be explained later herein, is formed through the stationary mounting plate 10.
• a coupling hole 21 which receives therein a seat back coupling part 111 provided in a sector gear (110 of
• FIG. 3 of the seat recliner 100 which will be explained later herein, is formed through the rotatable plate 20. [25] Therefore, the holder 120 of the seat recliner 100 is supported by the stationary mounting plate 10, and the sector gear (110 of FIG. 3) is inserted into the coupling hole (21 of FIG. 2), such that the seat back coupling part 111 engages with the coupling hole 21, so that the sector gear 110 is rotated along with the rotatable mounting plate 20.
• the reference numerals 12 and 22 denote locking protrusions.
• the locking protrusions 12 and 22 are respectively coupled to the stationary mounting plate 10 and the rotatable mounting plate 20, and respectively support an inside end 31 and an outside end 32 of a spring 30.
• a shaft 40 is coupled to a cam (130 of FIG. 3), which is provided in the seat recliner 100, so that the rotation of the cam 130 is controlled by the shaft 40.
• a lever (not shown), which is provided for manually conducting a reclining operation, is coupled to an end of the shaft 40.
• the seat recliner 100 includes the sector gear 110, from the upper surface of which the seat back coupling part 111 protrudes, and the holder 120, which contacts the sector gear 110 and is coupled thereto so that they are rotatable with respect to each other, and from the lower surface of which the seat cushion coupling part 121 protrudes. Furthermore, the cam 130, a plurality of lock gears 140, a thin plate ring 150 and a return spring 160 are provided in a space that is defined when the sector gear 110 is coupled to the holder 120.
• the seat back coupling part 111 protrudes from the sector gear 110 around a through hole 112, which is formed in the center through the sector gear 110.
• the seat back coupling part 111 includes a main body I l ia, which is provided on the upper surface of the sector gear 110 and is formed into a ring shape having a predetermined diameter, and a plurality of coupling teeth 11 Ib, which protrude outwards from the circumferential outer edge of the main body 11 Ia at positions spaced apart from each other at predetermined intervals in a circumferential direction.
• the present invention is advantageous in that the strength of the seat recliner 100 with respect to the moment of the seat back is increased.
• the coupling teeth 11 Ib comprise three large teeth 11 Ib-I, each of which has a relatively large width, and which are arranged around the main body of the seat back coupling part at regular angular intervals in a circumferential direction, and four small teeth 11 lb-2, each of which has a relatively small width, and which are provided around the main body of the seat back coupling part between the adjacent large teeth 11 Ib-I.
• two or more kinds of teeth 11 Ib-I and 11 lb-2, having different sizes, are provided in the sector gear 110, the engaging strength and shearing strength of the seat recliner 100 with respect to rotating force transmitted from the seat back can be further enhanced.
• large teeth 11 Ib-I can enhance the shearing strength
• a relatively large number of small teeth 11 lb-2 can enhance the compressive strength.
• the holder 120 includes a plurality of protruding coupling parts (the seat cushion coupling part) 121, which protrude from the outer surface (the lower surface in FIG. 3) of the holder 120.
• the protruding coupling parts 121 generally serve as the seat cushion coupling part, which is coupled to the stationary mounting plate (10 of FIG. 2).
• the holder 120 further includes a plurality of lock gear guide parts
• a spring seating part 124 is formed in the central portion of the holder 120, such that the return spring 160 is provided around the through hole 123 (see, FIG. 7).
• the rotation of the cam 130 is controlled by the shaft (40 of FIG. 2), which passes through the through hole 123 of the holder 120.
• the lock gears 140 are compressed by respective protrusions 131, which are provided on the circumferential outer edge of the cam 130, and by the rotation of the cam 130, thus sliding in a state in which they are in contact with the lock gear guide parts 122 of the holder 120.
• the gear teeth (113 of FIG. 5) provided on the circumferential inner surface of the sector gear 110, engage with or disengage from the lock gears (140 of FIG. 3), so that the sector gear 110 is locked to or unlocked from the holder 120.
• the return spring 160 is received in the spring seating part 124 of the holder 120.
• An inner end 161 of the return spring 160 is supported by the cam 130, and an outer end 162 thereof is supported by the holder 120, thus serving to elastically return the rotated cam 130.
• one 121-1 of the protruding coupling parts 121 is connected to the spring seating part 124, so that, as shown in FIG. 7, the outer end 162 of the return spring 160 is received in and supported by the protruding coupling part 121-1.
• the protruding coupling part can be used as a spring support, the shape of the holder 120 is simplified, compared to the conventional art, in which a separate support for the return spring 160 is provided in the spring seating part 124 (refer to FIG. 5 of Korean Patent Laid-Open Publication No. 10-2006-0016865). Therefore, the present invention is advantageous in that the manufacturability and strength of the holder 120 are enhanced.
• the thin plate ring 150 is interposed between the cam 130 and the return spring 160, the inner end 161 of which is coupled to the cam 130.
• the thin plate ring 150 serves as a cover of the spring seating part 124, into which the return spring 160 is seated.
• the perimeter of the lower surface of the cam 130 is supported by the thin plate ring 150, so that the lock gear 140 and the cam 130 can be smoothly operated in conjunction with each other in the same plane.
• an assembly holder 170 receives and supports the sector gear 110 and the holder 120 in the state in which the sector gear 110 and the holder 120 contact each other.
• the sector gear 110 and the holder 120 can be maintained at constant positions, when they are rotated relative to each other, by the support of the assembly holder 170 (refer to FIG. 10).
• the seat recliner 100 for vehicles according to the embodiment of the present invention may further include a compression spring 180, which is provided between the lock gear guide part 122 and the lock gears 140.
• the compression spring 180 compresses the lock gear 140 such that the lock gear 140 can smoothly engage with, in other words, be smoothly locked to, the internal gear teeth (113 of FIG. 5) formed on the circumferential inner surface of the sector gear (110 of FIG. 5).
• the locking of the lock gear 140 is realized by the elastic restoring force of the return spring (160 of Fig. 3) through the cam 130.
• the return spring 160 of Fig. 3
• the compression spring 180 is provided to avoid the unstably locked state described above.
• the compression spring 180 along with the returning rotating force of the return spring 160, slides the lock gears 140 in the direction in which that lock gears 140 are returned to the original positions, thus achieving the stably locked state of the seat recliner.
• FIGS. 9 and 10 are a plan view and a side sectional view, respectively, comparing the assembled states of the conventional seat recliner 200 for vehicles and the seat recliner 100 for vehicles according to the embodiment of the present invention.
• the overall diameter thereof is 83 mm
• the overall height, other than the seat back coupling part 211 and the seat cushion coupling part 221 is 17.1 mm.
• the seat recliner 100 for vehicles according to the embodiment of the present invention has a total diameter of 94 mm and an actual height of 17.3 mm.
• the seat recliner 100 for vehicles according to the embodiment of the present invention is increased in the total diameter and in actual height, compared to the conventional seat recliner.
• the strength of the seat recliner 100 is increased by the increase in size, and the engagement strength and support strength thereof are also increased because the seat back coupling part 111 has an improved shape.
• the strength of the seat cushion coupling part 121 of the holder 120 which is increased in size, is also increased.

Landscapes

• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Chairs For Special Purposes, Such As Reclining Chairs (AREA)
• Seats For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=38625225

Family Applications (1)

Country Status (2)

Cited By (4)

Families Citing this family (2)

Citations (5)

• 2006
  • 2006-04-26 KR KR1020060037806A patent/KR20070105552A/ko not_active Application Discontinuation
• 2007
  • 2007-04-25 WO PCT/KR2007/002013 patent/WO2007123367A1/en active Application Filing

Patent Citations (5)

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