KR100785826B1 - Seat reclining device - Google Patents

Abstract

A seat reclining device is provided to reinforce coupling force between a holder and a gear wheel and reduce abrasion and noise caused by friction during an operation of the seat reclining device. A seat reclining device comprises a holder(110) having a gear rim formed with a tooth section at the inner peripheral surface thereof. A clamper(150) is received in the holder(110) to rotate about a certain rotating shaft. A hinge guide(140) is received in the holder(110) to provide the rotating shaft of the clamper(150). A spring(120) rotates the clamper(150) by pressing the clamper(150). A gear wheel(160) is received in the holder(110) such that the gear wheel(160) is interposed between the clamper(150) and the gear rim. A cam(130) is supported by the holder(110). The clamper(150) has a clamping surface that protrudes from two sides of the rotating shaft in the radius direction.

Description

Seat Reclining Device {SEAT RECLINING DEVICE}

1 is an exploded perspective view of a seat reclining apparatus according to a first embodiment of the present invention;

2 is a cross-sectional view of the seat reclining device of FIG.

3 and 4 are a plan view of a partially engaged state for explaining the operating state of the seat reclining apparatus of FIG.

5 is an enlarged view of region V of FIG. 4;

6 and 7 are a plan view of a partially engaged state for explaining the operating state of the seat reclining apparatus according to a second embodiment of the present invention,

FIG. 8 is an enlarged view of region VII of FIG. 7;

9 is a perspective view showing another embodiment of the holder and the gear wheel of the seat reclining apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: seat reclining apparatus 110: holder

111: gear rim 112: receiving portion

113: boss 114, 161: attachment protrusion

115: gear wheel seat 120: spring

130: cam 131: cam surface

132: input groove 140: hinge guide

141: hinge hole 150: clamper

151: hinge protrusion 152: locking protrusion

153: recess 154: clamping surface

160: gear wheel 170: housing

The present invention relates to a seat reclining apparatus, and more particularly, to a seat reclining apparatus characterized in that the contact force of the gear wheel to the gear rim of the holder is achieved by the self-rotating structure of the clamper. It is about.

The seat reclining apparatus is a device for adjusting the reclining amount of a seatback with respect to a seat mainly applied to a vehicle.

Among these kinds of sheet reclining apparatus, US Patent No. 6,830,298 "ADJUSTMENT-LOCKING MECHANISM FOR AN AUTOMOBILE SEAT BACK" (published: December 14, 2004), US Patent No. 2003/0214165 "FITTING FOR A VEHICLE SEAT" (published) As disclosed in November 20, 2003, there is an apparatus having a locking and unlocking structure between an inner tooth (holder side) and an outer tooth (gear wheel side) having different teeth.

The engagement coupling structure between the inner tooth and the outer tooth has an advantage that the reclining state between the seat and the seat back is relatively stable.

However, the conventional sheet reclining apparatus requires a relatively large number of parts, and thus, improvements in terms of manufacturing cost, complexity of manufacturing process, and increase in total weight are required.

In addition, in order to maintain locking between the holder and the gear wheel, the gear wheel is pressed to the holder side by a surface contact such as a wedge so that the gear wheel is engaged with each other. In addition to the weakening of the coupling force, there was a problem that a lot of wear due to friction due to the surface contact between the wedge and the gear wheel and the noise is severe.

Accordingly, it is an object of the present invention to improve the manufacturability and productivity by reducing the number of parts and to achieve a reduction in the overall weight, and to increase the coupling force between the holder and the gearwheel, as well as the amount of wear and noise generated by friction during operation. It is to provide a sheet reclining apparatus that can reduce the.

In order to achieve the above object, the present invention provides a reclining apparatus for a seat, comprising: a holder having a gear rim having a tooth formed on an inner circumferential surface thereof; A clamper accommodated in the holder to rotate about a predetermined rotation shaft; A hinge guide accommodated in the holder to provide a rotation shaft of the clamper; A spring for pressing and rotating the clamper; A gear wheel accommodated in the holder so as to be interposed between the clamper and the gear and engaged with the gear and pressurized by the rotating clamper to fix the position within the holder; And a cam rotatably supported by the holder to release the pressing force against the gear wheel by pivoting the clamper back.

Here, the clamper has a clamping surface protruding in a radial direction on both sides of the rotation shaft, one side of the clamping surface is in contact with the cam and the other clamping surface is the gear wheel during rotation by the spring May be pressurized.

At this time, the clamper may be such that the rotation radius of the point pressed by the spring around the rotation shaft is larger than the rotation radius of the clamping surface.

The clamper may be provided with a pair of line symmetry.

Further, the clamper presses the gear wheel while rotating clockwise (counterclockwise) about the rotational shaft by the rotation of the spring, and the half of the clamper about the rotational shaft by the rotation of the cam. The pressing force on the gear wheel may be released while rotating clockwise (clockwise).

In addition, the gear wheel may be formed to be integrally formed with a plurality of attachment protrusions on the opposite side of the holder.

In addition, the gear and the gear wheel may be formed in a plurality of layers, respectively.

In addition, the gear wheel may have a tooth that is engaged with the gear to the outer periphery.

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

As shown in FIG. 1, the seat reclining apparatus according to the first embodiment of the present invention includes a holder 110 having a gear 111 formed with teeth T1 on an inner circumferential surface thereof, and a receiving portion of the holder 110 ( The gear accommodated in the gear wheel seating portion 115 formed around the receiving portion 112 in the cam 130, the hinge guide 140, the clamper 150 and the spring 120, the holder 110 accommodated in the 112 The wheel 160 and a housing 170 for receiving the outer circumference of the gear wheel 160 and the holder 110 to support relative rotation.

The holder 110 has a gear 111 protruding upward from an outer circumference thereof, and a tooth T1 is formed as an inner circumferential surface of the gear 111. An accommodating part 112 is provided inside the gear 111, and a boss 113 for pivotally supporting the cam 130 is protruded at the center thereof.

The attachment protrusion 114 is protruded downward in the holder 110, and may be coupled to the seat frame (not shown).

The cam 130 is rotatably coupled to the boss 113 of the holder 110, and the hinge guide 140 is accommodated on one side of the cam 130 (see FIG. 3).

In addition, a pair of clampers 150 are symmetrically inserted around the cam 130 (see FIG. 3). The clamper 150 has a hinge protrusion 151 protruding downward from one side end thereof and inserted into the hinge holes 141 provided at both ends of the hinge guide 140. The clamper 150 rotates using the hinge hole 141 to which the hinge protrusion 151 is coupled as the rotation shaft A. FIG.

In addition, the clamper 150 is provided with a locking protrusion 152 protruding downward, and when the cam 130 rotates, the locking protrusion 152 is pressed by the cam surface 131 so that the entire clamper 150 rotates with the rotating shaft ( It rotates around A) (refer FIG. 3 and FIG. 4).

The upper surface of the cam 130 is in contact with the outside through the opening 162 of the gear wheel 160, and is coupled to the reclining knob (not shown) through the input groove 132 formed on the upper surface. Accordingly, the seat occupant of the seat may adjust the reclining angle of the seat by rotating the reclining knob connected to the cam 130.

On the outer circumference of the cam 130, the cam surface 131 is symmetrically protruded to correspond to the locking protrusion 152 of the clamper 150. When the cam 130 rotates, the clamper 150 is rotated by the cam surface 131.

1 and 3, the spring 120 is accommodated around the cam 130, the hinge guide 140, and the clamper 150, which are already accommodated in the accommodating part 112 of the holder 110. do. Both ends 121 of the spring 120 are caught by the recess 153 formed at the end opposite to the rotation shaft A of the clamper 150, respectively. As shown in FIG. 3, the spring 120 always elastically presses the clamper 150 inwardly, and accordingly, the clamper 150 rotates inwardly about the rotation shaft A, so as to be described later. The wheel 160 is pressed to maintain a state of locking (locking).

The gear wheel 160 has a tooth shape T2 having a size that can be engaged with the tooth shape T1 of the holder 110 around the outer circumference thereof and is accommodated in the gear wheel seat 115 of the holder 110. . The number of gear teeth of the gear wheel 160 is smaller than the number of gear teeth of the holder 110, so that the gear wheel 160 is engaged with the gear wheels 111 in the inner circumferential surface of the holder 110 so that relative rolling motion is possible. Has

A plurality of attachment protrusions 161 protrude integrally from the direction opposite to the holder 110 of the gear wheel 160, that is, the upper side in FIG. 1. Attachment protrusion 161 is coupled to the seat back frame (not shown).

The holder 110 and the gear wheel 160 accommodate the spring 120, the cam 130, the hinge guide 140, and the clamper 150 to be operable, respectively, by the outer housing 170. Combined with each other. 1 and 2, the gear wheel 160 is slidably supported on the gear wheel seat 115 of the holder 110 by the housing 170.

The operation process of the seat reclining apparatus 100 having the above configuration is as follows.

As shown in FIG. 3, in a state in which no external rotation force is applied through the cam 130, the pair of clampers 150 maintains a state in which the pair of clampers 150 is pressed inward by the spring 120. That is, the clamper 150 has clamping surfaces 154 (see FIG. 5) protruding in the radial direction of the rotation shaft A on both sides of the rotation shaft A, and the clamper 150 is pressed by the spring 120. ), The clamping surface 154 rotates integrally to support the inner cam 130 (refer to FIG. 5) and rotate the outer gearwheel 160 (refer to FIG. 5) outward (i.e., radially) when the To pressurize).

In particular, since the clamper 150 has a much larger radius of rotation than the radius of rotation of the clamping surface 154, the radius of rotation of the recess 153 pressurized by the spring 120 about the rotation axis A is large in shape. In proportion to the ratio of the rotation radius it is possible to apply a much larger pressing force to the gear wheel 160 compared to the spring force (crowd principle).

Due to the pressing of the clamper 150, the gear wheel 160 does not perform rolling motion while being engaged with the gear 111 in the holder 110, but is fixed at a position that is currently engaged with the gear 111. Locked. That is, the gear wheel 160 is fixed in the holder 110 by contact pressure with the outer clamping surface 154 of the clamper 150 and contact pressure with the inner clamping surface 154 and the cam 130. (Locked).

According to the pressing structure of the clamper 150, as the contact pressing force on the gear wheel 160 is larger than the conventional fixed position of the gear wheel 160 by the contact pressure of the entire circumferential surface of the wedge gear The engagement of the wheel 160 and the gear 111 may also be made stable to enhance the coupling force between the gears.

Here, as the clampers 150 are provided in pairs, the pressing force applied to the gear wheel 160 by the clamping surface 154 of each clamper 150 is doubled compared to one clamper 150.

In the case of applying the rotational force to the cam 130 in such a stop state, as shown by the solid line in Figure 4, the locking projection 152 of the clamper 150 in contact with the cam surface 131 in accordance with the rotation of the cam 130 As it is pushed and rotated together, the clampers 150 are respectively spread outwardly (left and right respectively in the drawing) about the rotation axis A. FIG. In FIG. 4, the portion indicated by the dotted line indicates the position before the rotation of the cam 130.

Therefore, with the rotation of the cam 130, the clamping surface 154, which has been pressing the cam 130 and the gear wheel 160 inward and outward, respectively, also rotates integrally with the clamper 150, so that the gear wheel 160 The pressing force is also released (ie unlocked). The reclining of the seat is made while the gear wheel 160 makes a rolling motion along the gear 111 in a state where the pressing force on the gear wheel 160 is released.

5 is an enlarged view showing a state in which the clamping surface 154 presses (dotted line) and depressurizes (solid line) the cam 130 and the gear wheel 160 located inside and outside according to the rotation of the clamper 150. It is also. When the clamper 150 rotates while the gear wheel 160 is depressurized (unlocked), between the cam 130 and the inner clamper surface 154 and between the outer clamper surface 154 and the gear wheel 160. There is a clearance in the gear wheel 160 of the gear wheel 160 on the gear (111 of Figure 4) can be made.

Meanwhile, in the seat reclining apparatus according to the second embodiment of the present invention, as shown in FIGS. 6 to 8, the pressing force of the spring 220 against the clamper 250 in the locked state of the gear wheel 160 is equal to the above. It is set so as to be applied to the opposite side, that is, to the outside of the first embodiment.

To this end, the recess 253 of the clamper 250 is formed to be located inside the clamper 250, the cam 230 is the clamper 250 to rotate the clamper 250 inward when rotating Has a locking ring 231 structure for receiving the locking projection 252 of the.

At the time of rotation of the cam 230, as shown by the solid line in FIG. 7, both of the clampers 250 are rotated inward.

The clamping surface 254 of the clamper 250 also has a shape opposite to that of the first embodiment (see FIG. 5). That is, as shown in FIG. 8, the clamping surface 254 in the present embodiment is the clamping surface 254 when the clamper 250 rotates inward, that is, counterclockwise about the rotation axis A '. ) Is formed to release the contact force.

Meanwhile, in the above embodiments, the gear 111 and the gear wheel 160 may be formed of a plurality of layers, respectively, as shown in FIG. 9 to be engaged with each layer. Thereby, the joining strength of the holder 210 and the gear wheel 260 can be strengthened.

As described above, according to the sheet reclining apparatus according to the present invention, by reducing the number of parts constituting the entire sheet reclining apparatus, it is possible to improve the manufacturability and productivity and to reduce the total weight. In addition, by adopting a clamper driving method that presses (locks) or releases (unlocks) the gear wheel while rotating about the rotation shaft by a cam in the holder, not only the coupling force between the holder and the gear wheel is strengthened, but also by the clamper. It can improve the pressing force and reduce the amount of abrasion and noise caused by friction when the clamper is operated.

Claims (8)

In the reclining apparatus of the sheet, A holder having a gear rim with teeth formed on an inner circumferential surface thereof; A clamper accommodated in the holder to rotate about a predetermined rotation shaft; A hinge guide accommodated in the holder to provide a rotation shaft of the clamper; A spring for pressing and rotating the clamper; A gear wheel accommodated in the holder so as to be interposed between the clamper and the gear and engaged with the gear and pressurized by the rotating clamper to fix the position within the holder; And And a cam rotatably supported by the holder to release the pressing force on the gear wheel by rotating the clamper back, The clamper, A clamping surface protruding in a radial direction on both sides of the rotation shaft is provided, the one side clamping surface is in contact with the cam and the other clamping surface pressurizes the gear wheel during rotation by the spring Sheet reclining device. delete The method of claim 1, The clamper, And a rotation radius of the point pressed by the spring about the rotation shaft is larger than the rotation radius of the clamping surface. The method of claim 1, The clamper is a seat reclining device, characterized in that provided in a pair of line symmetry. The method of claim 1, The clamper, Pressing the gear wheel while rotating clockwise (counterclockwise) about the rotating shaft by the rotation of the spring, and counterclockwise (clockwise) about the rotating shaft by the rotating of the cam. The seat reclining device, characterized in that to release the pressing force to the gear wheel while rotating. The method of claim 1, The gear wheel, A seat reclining apparatus, characterized in that a plurality of attachment protrusions integrally formed on the opposite side of the holder. The method of claim 1, And said gearwheel and said gearwheel are each formed of a plurality of layers. The method of claim 1, The gear wheel seat reclining device, characterized in that the teeth formed on the outer circumference is meshed with the gear.

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