KR101417438B1 - Recliner of vehicle seet - Google Patents

Abstract

The present invention relates to a recliner for a vehicle seat, comprising: an external gear bracket having a through hole through which a rotating shaft is formed; an internal gear bracket having a central projection protruding from one surface thereof to be fitted into the through hole; And a power transmission unit for causing the gear bracket to rotate with respect to the internal gear bracket, wherein the power transmission unit includes a socket protrusion having a through-hole through which the rotation shaft passes and spline- A wedge spring that is supported by the socket block and is inserted between the pair of wedge blocks so that both ends of the wedge block are bent to elastically push the wedge block; A load applied to the central projection by the wedge block, which is provided between the socket block and the pair of wedge blocks, It characterized in that it comprises a load distribution member for dispersing. Therefore, the inner circumferential surface of the wedge block is supported by the outer circumferential surface of the central projection of the internal gear and the boss plate serving as the load distribution member provided on the socket block, so that the wedge block is not tilted so that the engagement between the internal gear and the external gear can be maintained The operation failure of the recliner can be prevented.

Description

RECLINER OF VEHICLE SEET}

The present invention relates to a recliner for a vehicle seat, and more particularly to a recliner for a vehicle seat, comprising a load distribution member for dispersing a load applied to a central projection of an internal gear bracket by a wedge block, The invention relates to a recliner for a vehicle seat capable of improving the strength by preventing the engagement ratio between the internal gear and the external gear from deteriorating.

BACKGROUND ART Generally, a recliner is provided in a vehicle such that the seat back can be pivotally connected to the seat cushion through a hinge structure, and the seat cushion can be switched from an unlocked state in which the angle is fixed to an unlocked state . That is, the occupant adjusts the angle of the seat back with respect to the seat cushion according to the body shape or convenience by the recliner.

Such a recliner includes a lever system in which the locking of the reclining is released and the seatback is pushed by the passenger to adjust the angle when the operating lever is operated and a rotary system in which the operating knob in the form of a dial is rotated to operate the angle of the seatback .

One example of the recliner of the rotary type among these recliners is disclosed in Korean Patent Laid-Open No. 10-2010-0095171.

1, the conventional recliner device 10 includes a rotary shaft 11, an external gear bracket 12, an internal gear bracket 13, a socket block 14, a bearing 15, A cover plate 16, a guide bracket 17, and a power transmitting unit 20.

The external gear bracket 12 is formed with a fitting hole 12a at its center, and an internal gear type internal gear 12b is formed on the inner surface thereof.

A center projection 13a is formed at the center of the internal gear bracket 13 and an internal gear 13b selectively meshing with the external gear 12b is formed along the circumferential direction on the outer peripheral surface. do. Here, the internal gear 13b has fewer gear teeth than the external gear 13b.

The socket block 14 is formed with a coupling hole 14a through which the rotary shaft 11 passes and is spline-coupled. A socket projection 14b is formed on one side of the coupling hole 14a of the socket block 14 so as to be inserted into the central projection 13a of the internal gear bracket 13.

In addition, an operation protrusion 14c for partially enclosing the outer circumferential surface of the center protrusion 13a is protruded from the bottom of one side of the socket block 14.

In addition, the socket block 14 is provided with a spring protrusion 14d protruding in the direction opposite to the socket protrusion 14b.

The bearing (15) is inserted into the fitting hole (12a) of the external gear bracket (12).

The power transmission unit 20 is configured to cause the external gear bracket 12 to rotate with respect to the internal gear bracket 13 and includes a pair of wedge blocks 21 rotating along the central projection 13a, A cam 22 which is in close contact with the bearing 15 and a wedge spring 21 which is provided so as to be fitted to each of the pair of wedge blocks 21 formed at both ends thereof and which provides a force to open the wedge block 21 outwardly 23).

The cam 22 is formed in a substantially semicircular shape and the inner circumferential surface of the wedge block 21 is partially in contact with the outer surface of the wedge block 21 so that the entire outer circumferential surface thereof is completely in contact with the inner surface of the bearing 15, And is configured to be pivoted during operation.

The plate cover 16 seals the rear portion of the external gear bracket 12 to prevent the socket block 14 and the power transmission unit 20 from separating from each other.

The guide ring 17 includes an external gear bracket 12 and covers the outer circumferential surfaces of the internal gear bracket 13 and the plate cover 16 and integrally joins them with one recliner device 10. [ .

The operation of the recliner device 10 is such that the wedge block 21 which receives the rotation of the socket block 14 through the rotary shaft 11 which receives the lever or motor external force is rotated together with the cam 22, Since the rotation of the backrest 21 causes a change in the position of the coupling section due to the difference in the gear teeth number, the angle of the backrest is adjusted by the coupling section variation.

The recliner 10 of the conventional vehicle seat as described above is operated in a state in which the two wedge blocks 21 surround the outer circumferential surface of the central projection 13a formed at the center of the internal gear bracket 13. [ Therefore, the central projection 13a is permanently deformed so that its outer circumferential surface always receives a concentrated load by the wedge block 21 and sinks. When the permanent projections of the internal gear bracket 13 are depressed, the wedge block 21 rotated along the outer peripheral surface of the internal gear bracket 13 is tilted so that the internal gear 13b of the internal gear bracket 13 There is a problem that the engagement ratio of the external gear 12b of the external gear bracket 12 is lowered.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a load distributing means for distributing a load acting as a central projection of an internal gear bracket, And it is an object of the present invention to provide a recliner device for a vehicle seat which can improve the operating endurance performance during driving.

According to an aspect of the present invention, there is provided an external gear bracket including a through hole through which a rotary shaft passes, an external gear having an external gear, a central protrusion fitted to the through hole, An internal gear bracket provided with an internal gear partially engaged with an external gear, a socket block having a socket protrusion protruded on one surface thereof, the socket block having a through hole through which the rotating shaft is inserted and splined, A pair of wedge blocks, a wedge spring supported by the socket block and bent at both ends to be pinched between the pair of wedge blocks to elastically push out the wedge block, And a load distribution member for dispersing a load applied to the central projection by the wedge block, wherein the load The dispersing member is preferably composed of a boss plate sandwiched by the socket projection of the socket block, an outer diameter of which is close to an end of the central projection, and an outer diameter of which is the same as the outer diameter of the central projection.

Preferably, the boss plate is integrally formed on one surface of the socket block in which the socket protrusion of the socket block is formed.

It is preferable that the load distribution member is constituted by a cam sleeve which surrounds a part of the outer circumferential surface of the socket projection of the socket block and is in close contact with the inner circumferential surface of the pair of wedge blocks.

In addition, the pair of wedge blocks may be provided with a bending portion whose ends are bent inwardly in order to press both ends of the cam sleeve in operation.

According to the present invention, since the inner circumferential surface of the wedge block is supported by the outer circumferential surface of the central projection of the internal gear and the boss plate serving as the load distribution member provided in the socket block, the wedge block is not tilted so that the engagement between the internal gear and the external gear So that the strength of the recliner can be improved.

Further, since the cam sleeve is provided between the wedge block and the central projection, a load due to the wedge block is not concentrated by the cam sleeve, but acts on the central projection to delay and prevent the central projection from collapsing. So that the strength of the recliner can be improved.

1 is an exploded perspective view showing a conventional vehicle recliner device.
2 is a plan sectional view showing a conventional vehicle recliner device.
3 is an exploded perspective view showing a reclining apparatus for a vehicle according to a first embodiment of the present invention;
4 is a sectional view showing a vehicle recliner apparatus according to a first embodiment of the present invention.
5A and 5B are views showing a state in which a load is applied to a central projection by a wedge block with or without a socket plate in the recliner of Fig.
6 is an exploded perspective view showing a reclining apparatus for a vehicle according to a second embodiment of the present invention.
Fig. 7 is a plan view showing a main portion of the recliner of Fig. 6 in which a cam serving as a load-distributing member is provided between the wedge block and the central projection in the power transmitting unit.
Figs. 8A and 8B are diagrams comparing a state in which a load acts on the wedge block and the central projection when the cam is located between the outer peripheral surface and the inner peripheral surface of the wedge block in the recliner according to the second embodiment of the present invention .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 3 is an exploded perspective view showing a reclining apparatus for a vehicle according to a first embodiment of the present invention, FIG. 4 is a sectional view showing a vehicle reclining apparatus according to a first embodiment of the present invention, and FIGS. 4 shows a state in which a load acts on a central projection by a wedge block according to presence or absence of a socket plate in a recliner.

The recliner apparatus 100 according to the first embodiment of the present invention includes an external gear bracket 110, an internal gear bracket 120, a guide ring 130, a plate cover 140, The power transmission unit 200 includes a socket block 210, a wedge block 220, a wedge spring 230, a cam 240, and a load distribution portion 250. [

First, the external gear bracket 110 is fixed to the seatback frame by a separate fixing member, and a through hole 111 is formed at the center. An internal gear 112 of an internal gear type formed by a plurality of gear teeth is continuously formed on the inner side surface of the external gear bracket 110 along the circumferential direction.

The internal gear bracket 120 is formed as a circular member welded to the seat cushion frame, and a central protrusion 121 protrudes from the center of the internal gear bracket 120 toward the external gear bracket 110. On the outer peripheral surface of the internal gear bracket 120, an internal gear 122 in the form of an external gear engaged with the external gear 112 of the external gear bracket 110 is continuously formed along the circumferential direction.

Here, the internal gear 122 is composed of gear teeth smaller than the gear teeth of the external gear 112. Further, the central protrusion 121 is formed in the form of a pipe having a through-hole structure through which the rotating shaft can pass.

The internal gear bracket 120 may be coupled to the seat back frame and the external gear bracket 110 may be coupled to the seat cushion frame.

The power transmission unit 200 includes a socket block 210 splined to a rotation shaft rotated by an occupant and a pair of wedge blocks 210 surrounding an outer circumferential surface of the central projection 121 of the internal gear bracket 120 And a pair of wedge blocks 220 supported on the socket block 210 and bent at opposite ends of the wedge block 220. The wedge blocks 220 A wedge spring 240 for elastically pushing the center protrusion 122 between the socket block 210 and the pair of wedge blocks 220 and distributing the load applied to the center protrusion 122 by the wedge block 220 And a load-dispersing member (250).

The socket block 210 has a coupling hole through which a rotating shaft passes and is spline-coupled at the center. One side of the coupling hole of the socket block 210 is provided with a socket projection 211 penetrating through the through hole 111 of the external gear bracket 110 and inserted into the central projection 121 of the internal gear bracket 120, Respectively.

A socket protrusion 211 is provided at a lower portion of one side of the socket block 210 or the socket protrusion 211 so as to partially cover the outer circumferential surface of the center protrusion 121 when the socket protrusion 211 is inserted into the center protrusion 121 121 are protruded.

The socket block 210 is formed with a connection plate 213 for integrally connecting the socket protrusion 211 and the operation protrusion 212. A spring protrusion protruding in a direction opposite to the socket protrusion 211 is provided on one side of the connection plate 213.

The wedge block 220 is installed so as to surround the outer circumferential surface of the central projection 121 of the internal gear bracket 120 and has one end supported by the operation protrusion 212 of the socket block 210 And are installed so as to face each other. The wedge block 220 is installed to cover the outer circumferential surface of the central protrusion 121 together with the actuating protrusion 212. The wedge block 220 receives power from the actuating protrusion 212 upon rotation of the rotating shaft and rotates along the central protrusion 121 in the circumferential direction .

The wedge blocks 220 are formed in a circular arc shape of about one quarter of a circle, and are formed so as to be opposed to each other in a pair and to be narrowed from one end to the other end. A bent end of the wedge spring 240 is inserted between one end of the pair of wedge blocks 220 and the other end of each wedge block 220 is provided with a projection contact portion 221 Are bent outwardly.

The wedge spring 240 is supported by the connecting plate 213 of the socket block 210 and has both ends bent at right angles, that is, bent in the lengthwise direction of the rotating shaft and between the pair of adjacent wedge blocks 220 So that each wedge block 220 is resiliently pushed out.

At this time, each of the pair of wedge blocks 220 is supported at one end by the wedge spring 240 and the other end is supported by the operation protrusion 212 of the socket block 210.

The load distribution member 250 is formed of a donut-shaped boss plate that is fitted to the outer circumferential surface of the socket protrusion 211 of the socket block 210 and closely attached to the connection plate 213.

The boss plate is formed with a fitting hole at the center, and the socket projection 211 is passed through the fitting hole, and one surface of the boss plate is closely attached to the connecting plate 213. The outer diameter of the boss plate is formed to be the same as the outer diameter of the central projection 121 of the internal gear bracket 120. That is, a pair of wedge blocks 220 are in contact with the outer circumferential surface of the central projection 121 and the outer circumferential surface of the boss plate so that a load acting on the wedge block 220 during the operation of the wedge block 220 is transmitted to the central projection 121 and the outer circumferential surface of the boss plate, respectively. That is, when the wedge block 220 is operated, the inner circumferential surface of the wedge block 220 contacts the outer circumferential surface of the center protrusion 121 and the outer circumferential surface of the boss plate, And the load acting on it is injected.

Accordingly, the height of the center projection 121 of the internal gear bracket 120, in which the socket projection 211 of the socket block 210 is fitted, is reduced.

The boss plate is integrally formed on the connection plate 213 of the socket block 210 and is formed on the surface facing the internal gear bracket 120.

5B, when the boss plate serving as the load distribution member 250 is provided between the one surface of the socket block 210 and the central projection 121 of the internal gear bracket 120, the wedge block 220 Is supported by the outer circumferential surface of the central projection 121 and the outer circumferential surface of the boss plate so that the load is dispersed by the wedge block 220. As a result, It is possible to prevent the wedge block 220 from being inclined due to the depression of the central projection 121,

Fig. 6 is an exploded perspective view showing a reclining apparatus for a vehicle according to a second embodiment of the present invention; Fig. 7 is a plan view of the recliner of Fig. 6 with a cam as a load- FIGS. 8A and 8B are views showing a state where a load is applied to the wedge block and the central projection when the cam is located between the outer circumferential surface and the inner circumferential surface of the wedge block in the conventional recliner and the recliner according to the second embodiment of the present invention Fig.

The recliner 200 of the vehicle seat according to the second embodiment of the present invention includes the external gear bracket 110, the internal gear bracket 120, the power transmitting unit 200, the guide ring 130 and a plate cover 140. The power transmission unit 200 includes a socket block 210, a pair of wedge blocks 220, a wedge spring 240, and a load distribution member 250 ' And a cam sleeve configured to closely contact the inner circumferential surface of the pair of wedge blocks 220 and to surround the outer circumferential surface of the central projection of the internal gear bracket.

That is, in the recliner 100 according to the second embodiment of the present invention, the cam is removed from the power transmitting unit 200 of the recliner according to the first embodiment described above, and the load dispersing member 250 ' And a cam sleeve formed between the wedge block 220 and the central projection 121. [

The remaining main components of the recliner according to the second embodiment are the same as those of the recliner according to the first embodiment, and a detailed description thereof will be omitted.

As described above, since the cam sleeve, which is the load dispersing member 250 ', is provided between the pair of wedge blocks 220 and the central projection 121, when the recliner operates, one of the pair of wedge blocks 220 8A, the load caused by the wedge block acts intensively on the central projection 121, as in the case of the conventional Fig. 8A. As shown in Fig. 8B of the second embodiment of the present invention, The central projections 121 are dispersed by the cam sleeves 250 ', so that the load absorption rate of the central projections 121 is increased.

The action of the recliner according to the present invention having the above-described structure will be described as an example of the recliner according to the first embodiment.

Here, the recliner according to the embodiment of the present invention is a seat reclining apparatus which is provided on a seat, in which an occupant directly rotates an operating dial coupled to a rotating shaft coupled to the socket block or connects a rotating shaft to a motor, And is configured to be operated by driving the motor when the occupant presses the operation button.

First, when the recliner device 100 is locked, the pair of wedge blocks 220 are forced outward due to the elastic force of the wedge spring 240, so that the outer peripheral surfaces of the pair of wedge blocks 220 A part of the internal gear 122 of the internal gear bracket 120 and a part of the external gear 112 of the external gear bracket 110 are kept in contact with the inner surface of the cam 230, So that the engagement is achieved.

Thereafter, the occupant operates the operation dial or the operation button provided on the seat in order to adjust the inclination of the seat back.

Then, the rotation shaft connected to the operation dial or connected to the motor driven by the operation button is rotated.

The rotation shaft is configured to be rotated forward or backward by the recliner device 100 at the lower end of the seatback so that it can be rotated clockwise or counterclockwise. Here, the rotation axis is rotated clockwise, for example.

At this time, the socket block 210 splined to the rotating shaft 101 rotates in the clockwise direction. At this time, the operating protrusion 212 of the socket block 210 contacts the wedge block 220 of one of the pair of wedge blocks 220, (220) in the clockwise direction. The wedge block 220 and the cam 230 pushed by the operation protrusion 212 are rotated in the clockwise direction and at the same time the external gear bracket 110 is rotated by the number of teeth of the internal gear bracket 120 And generates a rotation ratio to rotate in a counterclockwise direction.

When the external gear bracket 110 rotates in this way, the seatback rotates to adjust the angle.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: Recliner device 110: External gear bracket
120: internal gear bracket 121: central projection
130: Guide ring 140: Plate cover
200: Power transmission unit 210: Socket block
211: Socket projection 212: Operation projection
220: Wedge block
240: Wedge spring
250, 250 ': Load distribution member

Claims (4)

An external gear bracket formed with a through hole through which the rotary shaft passes, and having an external gear;
An internal gear bracket having an internal gear protruding toward the external gear bracket and partially engaged with the external gear,
A socket block having a socket projection having a through hole through which the rotating shaft passes and spline-
A pair of wedge blocks surrounding an outer circumferential surface of the central projection,
A wedge spring fitted between the pair of wedge blocks to elastically push out the wedge block,
A load distribution member provided between the socket block and the pair of wedge blocks for dispersing a load applied to the central projection by the wedge block;
Lt; / RTI >
Characterized in that the load distribution member is composed of a boss plate which is fitted in a socket projection of the socket block and whose outer diameter is in close contact with the end of the central projection and whose outer diameter is the same as the outer diameter of the central projection Seat recliner. The method according to claim 1,
The boss plate
Wherein the socket block is integrally formed on one surface of the socket block in which the socket projection of the socket block is formed. The method according to claim 1,
The load-
And a cam sleeve enclosing a part of an outer circumferential surface of the socket projection of the socket block and closely contacting the inner circumferential surface of the pair of wedge blocks. The method of claim 3,
Wherein the pair of wedge blocks is provided with a bending portion whose ends are bent inwardly in order to press both ends of the cam sleeve in operation.

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