WO2017094964A1

WO2017094964A1 - Recliner, for vehicle seats, having auxiliary cam

Info

Publication number: WO2017094964A1
Application number: PCT/KR2016/000567
Authority: WO
Inventors: 백홍전; 박건영; 정태주
Original assignee: 주식회사 서연씨엔에프
Priority date: 2015-12-03
Filing date: 2016-01-20
Publication date: 2017-06-08
Also published as: CN107531169A; KR101693176B1

Abstract

The present invention relates to a recliner, for vehicle seats, which is applied to vehicle seats and is used for adjusting the rotation angle of a seat back with respect to a seat cushion. A holder has: a center auxiliary cam accommodating groove portion protruding in the opposite direction from a guide embossment; and a plurality of spring accommodating groove portions disposed opposite from each other with the auxiliary cam accommodating groove portion therebetween. The recliner, for vehicle seats, further comprises: an auxiliary cam which is accommodated in the auxiliary cam accommodating groove portion, is stacked and coupled with a cam and integrally rotates; and a plurality of springs which are accommodated in the spring accommodating groove portions, respectively, are disposed in a stacked relationship with a plurality of lock gears, and rotate and press the auxiliary cam on the inner side to a fixed direction. Therefore, the total thickness of the recliner in an assembled state can be reduced, leaning of the cam due to the pressing force of the springs can be prevented, and the operation can be more convenient.

Description

Recliner for vehicle seat with auxiliary cam

The present invention relates to a vehicle seat recliner that is applied to a seat of a vehicle and used to adjust the rotation angle of the seatback with respect to the seat cushion.

As a conventional recliner for a vehicle seat, a type similar to the present invention has a lock gear 500 that is radially slid between the guide embosses 210 of the holder 200, as shown in FIG. Due to the counterclockwise rotation of 400, the outer circumferential surface is pressed to the teeth of the outer circumferential surface of the side gear 300 to block the relative rotation of the sector gear, thereby locking the state. It is a configuration to make it possible.

According to the conventional recliner for a vehicle seat, the entire recliner has a structure in which a spring 600 for elastically rotating and pressing the cam 400 is laminated on the cam 400 to maintain the locked state. In addition to increasing the thickness, the inner end portion of the spring 600 is urged to push the cam 400 eccentrically in one direction, so that the force is evenly distributed to the four lock gears 510, 520, 530, and 540. There was a problem that it could not make a perfect match.

In addition, the inner end portion of the spring 600 is a structure in which the cam 400 is always pressurized constantly, and thus there is a problem in terms of ease of operation such as excessive force is required for the user when the cam 400 is rotated.

[Preceding technical literature]

Patent Registration No. 10-1422419 (Registration Date: 2014.07.16.)

Accordingly, an object of the present invention is to reduce the overall thickness in the assembled state compared to the prior art, to prevent the cam phenomenon caused by the pressing force of the spring, and to provide a recliner for a vehicle seat with improved operation convenience. There is.

In order to achieve the above object, the present invention, the holder is formed with a guide emboss protruding from each other at a predetermined interval in the circumferential direction, the outer surface of the guide emboss and rotatably coupled to the holder and the tooth (tooth) on the inner peripheral surface Locking between the sector gear having a sector rim formed therein and a circumferentially guided circumferentially circumferentially slidably guided radially so that the outer circumferential surface where the teeth are formed engages the sector rim and the sector rim retracts from the sector rim. A plurality of lock gears reciprocating between the off positions and a cam mounted on the center of the holder for rotational operation, and a cam for pressing the lock gear in the locking position to maintain engagement with the sector rim. In this case, the holder is the auxiliary of the center protruding in the opposite direction of the guide embossing An accommodating groove part and a plurality of spring accommodating groove parts disposed in opposite directions with the auxiliary cam accommodating groove part interposed therebetween are formed. The recliner for the vehicle seat is accommodated in the auxiliary cam accommodating groove part and laminated to the cam. An auxiliary cam that rotates integrally; And a plurality of springs respectively accommodated in the plurality of spring receiving grooves and disposed in a stacking relationship with the plurality of lock gears to rotate and pressurize the auxiliary cam in a predetermined direction. to provide.

Here, the plurality of springs has a protruding end extending in the direction of the auxiliary cam inward, the auxiliary cam has a plurality of arms protruding in a radial direction corresponding to the protruding ends of the plurality of springs, As the angle of rotation operation of the cam increases, the contact point of the protruding end with respect to the plurality of arms may move to the distal end of the protruding end.

The guide emboss is formed with a first guide surface for guiding one side of the lock gear and a second guide surface for guiding the other side surface opposite to the one side with respect to the neighboring rock gear. A main ground portion protruding inwardly and protruding inwardly to one side and a ground surface protruding inwardly protruding to the other side, the cam corresponding to the lock gear of the locking position; The main pressurizing surface portion for contacting and pressurizing to the outside and the additional pressurizing surface portion for contacting and pressurizing to the outside may be formed on the outer circumferential surface.

At this time, the first guide surface and the second guide surface of the guide emboss the surface contact with the one side and the other side of the lock gear to be slidably supported, the first guide surface in some sections including the outer end One side of the lock gear is in close contact with each other, and in some sections including the inner end portion, the one side surface of the lock gear is formed to have a micro clearance, while the second guide surface includes a portion including the outer end portion. In the section there is a micro clearance and the other side of the lock gear, in some sections including the inner end may be formed to support the other side of the lock gear in close contact.

In addition, the ground surface portion and the ground surface portion of the lock gear is formed so that the normal direction on each surface passes through the center region of the holder, wherein the section where the main surface portion interacts with the main pressing surface portion of the cam is a straight section And the main pressurizing surface portion is mutually connected to the main ground portion through an elliptical arc whose radius is continuously reduced in a rotational direction for pressing the lock gear to the locking position when the main pressurizing surface portion is based on the center of the cam. In addition, the elliptical arc may maintain the contact pressure while changing the contact point with the known ground portion when the detailed position change of the lock gear in the locking position.

In this case, the elliptical arc may form a part of an arc having a rotational center at a position spaced apart from the center of the cam so as to form a predetermined pressure angle in contact with the main ground portion at the locking position of the lock gear.

As described above, according to the vehicle seat recliner according to the present invention, the auxiliary cam accommodating groove portion and a plurality of spring accommodating grooves protruding in a direction opposite to the guide emboss of the holder are formed to accommodate the auxiliary cam in the auxiliary cam accommodating groove. And by taking the structure to be rotated by the spring accommodated in the plurality of spring receiving grooves to this effect can be obtained by reducing the axial thickness of the spring in the entire assembled recliner, the spring receiving grooves are auxiliary By placing the cam receiving grooves in opposite directions, each spring rotates and presses the auxiliary cams in opposite directions, thereby preventing the cam from tilting in one direction. Contributes to full gearing with the gear side.

Further, each of the protruding end portions of the plurality of springs is pressed against the inner side of the auxiliary cam side arm, and as the rotational angle of the auxiliary cam increases, the contact pressing point is configured to move to the distal end of the protruding end portion so as to rotate the recliner. It is possible to improve the user's ease of operation by having a characteristic that gradually decreases as the initial excessive force is rotated during operation.

Further, according to the vehicle seat recliner according to the present invention, the lock gear has a main ground portion and a ground ground portion, and correspondingly, a main pressurizing surface portion and an additional pressurizing surface portion are provided on the cam, and the main pressurizing surface portion of the cam causes the It is a structure that guarantees the locking state of the lock gear even in the case of tolerances in the overall manufacturing and assembly of the recliner and in the process of use by inducing the bias of the bearing force by first implementing the contact support of the ground surface part. Can be achieved.

In this case, as a countermeasure against the weak ground portion of the lock gear, the teeth are slightly spaced on the outer end side of the second guide surface of the guide embosser, which guides the other side of the rock gear, and symmetrically opposite to the rock gear. The micro-gap is placed on the inner end side of the first guide surface of the guide embosser guiding one side, so that the guide embossment absorbs the rotational force of the lock gear due to the rotational impact of the sector gear through the second guide surface, that is, plasticity A method of immersion is presented. Accordingly, the problem that the lock gear is pushed inward and the sector gear is free to rotate can be prevented.

In addition, the lock gear side main ground portion is a straight section, and the cam side main pressure surface portion for contact and pressurization is formed by an elliptical arc, so that the lock gear is locked at the locking position due to manufacturing and assembly tolerances and wear in use. Even when a position error occurs or the lock gear is pushed inward due to the impact, the elliptical arc can maintain a continuous contact pressure state while varying the contact point with the main ground portion.

1 is a plan view showing a state in which the main portion of the recliner for a vehicle seat according to the prior art is combined;

2 is an exploded perspective view of a recliner for a vehicle seat according to an embodiment of the present invention;

3 is a plan view showing the main portion of the vehicle seat recliner of Figure 2 combined;

4 is an enlarged view of area A of FIG. 3,

FIG. 5 is an enlarged view of region A of FIG. 3 to explain a process of biting the lock gear and the cam;

6 and 7 are plan views illustrating the installation state and action of the spring in the vehicle seat recliner of FIG.

Recliner 100 for a vehicle seat according to an embodiment of the present invention, as shown in Figure 2, is accommodated in the holder 110 and the sector gear 120 and the receiving space therebetween rotatably coupled to each other Lock 130 during rotation operation of the cam 130 and the cam lock 130, the four lock gear 140, the spring 150 to provide a rotational force to the cam 130 for the locking of the lock gear 140 A thin plate lock plate 160 is provided to achieve unlocking of 140. In addition, the cover ring 170 is welded to the holder 110 by covering the outer periphery of the sector gear 120 to maintain the rotational coupling state of the sector gear 120 relative to the holder 110.

The holder 110 is formed with two spring receiving grooves 111 accommodating the spring 151, and four guide embosses 112 accommodating the lock gear 140 are formed with different layers. Therefore, the spring 150 is accommodated in each spring receiving groove 111, and then the lock gear 140 is interposed between each guide embossing 112 to be stacked on each corresponding spring 150. The cam 130 is accommodated in the inner central regions of the four lock gears 140 to form the same layer as the lock gears 140.

The two springs 150 elastically pressurize the cam 130 through the auxiliary cam 180 accommodated therein.

3 is a plan view showing a state accommodated in the holder 110 as described above.

In this embodiment, the four guide embosses 112 are formed to be symmetrical with respect to the center point O at regular intervals in the circumferential direction. The lock gear 140 is interposed between the guide embosses 112 adjacent in the circumferential direction and is slidably guided in the radial direction. To this end, the guide emboss 112 has a first guide surface 112a for guiding one side 141 of the lock gear 140 and a second guide for guiding the other side 142 of the lock gear 140 opposite thereto. Guide surface 112b is formed. However, as shown, one lock gear 140 is guided by the first guide surface 112a on one side and the second guide surface 112b on the other side of the guide embosses 112 adjacent to each other.

Accordingly, the lock gear 140 has a locking position of FIG. 3 in which the outer circumferential surface 143 on which the tooth is formed is engaged with the sector rim portion 121 having the inner circumferential surface 121a on which the tooth gear side teeth are formed, and the sector rim portion ( 121 is released, and the reciprocating slide is performed between the locking-off positions retreating toward the center.

The slide to the locking position of the lock gear 140 is accomplished by radially pressing due to the clockwise rotation of the cam 130 located in the inner center.

In particular, in the present embodiment, as a configuration for maintaining the locked state of the lock gear 140 of the cam 130 in the locking position of FIG. 3, the lock gear 140 is connected to one side surface 141 to the inner side (center). Direction) and a ground surface portion 144 protruding inwardly in contact with the other side surface 142 opposite thereto.

Correspondingly, the outer circumferential surface of the cam 130 contacts the main ground surface portion 144 and presses the main pressure surface portion 131 and the additional ground surface portion 145 in contact with the ground surface portion 145 to the outside. 132 is formed.

Here, the main pressurizing surface portion 131 which presses the main ground portion 144 becomes an element that bears a large portion of the bearing force for the lock gear 140, for example, 60 to 90 [%], and the ground ground portion ( The additional pressing surface 132 for pressing the 145 will bear only a portion corresponding to the rest of the bearing force. That is, the maintenance of the locked state of the lock gear 140 is mainly made by the main ground portion 144 and the main pressurizing surface portion 131 which presses it.

Even when an error occurs in the locking position of the lock gear 140 through the exercise of the biased bearing force by the main pressing surface 131, the lock gear outer peripheral surface 143 and the sector gear side inner peripheral surface Smooth engagement can be induced so that a gap with 121a does not occur.

In addition, in the present embodiment, as shown in FIG. 4, the right side of the first and

second guide surfaces

112a and 112b of the guide emboss 112 that is slidably supported in surface contact with the lock gear 140. The first guide surface 112a closely supports the one side surface 141 of the lock gear 140 in the partial section 112a-1 including the outer end, while the partial guide 112a-2 includes the inner end. In one embodiment, one side 141 of the lock gear 140 is formed to have a fine clearance (c).

Correspondingly, the second guide surface 112b on the opposite side is formed so that the other side surface 142 of the lock gear 140 and the micro clearance c exist in some sections 112b-2 including the inner end portion. On the other hand, it is formed to closely support the other side surface 142 of the lock gear 140 in some section (112b-1) including the outer end.

According to the formation of the microgap c of the guide emboss 112, the lock gear 140 is a part of the outer side of the second guide surface 112b on the left side due to the portion of the microgap c as described above. There is room for fine rotation in the clockwise direction toward the section 112b-1, and fine rotation in the clockwise direction toward the inner partial section 112a-2 of the first guide surface 112a on the right side. There will be room for you.

The lock gear 140 having such an operation characteristic has an operating margin due to the fine play c when the cam gear 130 receives the biased bearing force of the cam 130 from the main ground portion 144. When fully engaged with the inner circumferential surface 121a on the side of the sector gear 120, a perfect engagement can be achieved naturally.

In other words, it is possible to obtain an effect of securing the operation margin of the lock gear 140 for the perfect engagement.

On the other hand, assuming that the rotational shock of the sector gear 120 is applied to the lock gear 140, the main pressing surface 131 of the cam 130 is locked against the clockwise rotational impact of the sector gear 120. It is not a problem because it can exert sufficient supporting force to stably support the main ground portion 144 of the gear 140, but it is not a problem for the counterclockwise rotational impact of the sector gear 120. ) May not be enough to support the ground portion 145 alone.

In this case, the anti-clockwise rotational shock of the sector gear 120 is transmitted to the left side by transmitting the rotational shock through the other side 142 before the lock gear 140 slides inward, that is, the center direction. It is preferable to guide the guide embossing 112 to be absorbed and recessed.

In order to further induce this behavior, in the present embodiment, the second guide surface 112b has a recess 114 formed in some of the remaining sections except for the inner end and the outer end. Accordingly, since the counterclockwise rotational impact of the lock gear 140 is less supported by the recess 114, it is possible to concentrate more on some sections 112b-1 of the outer side so as to sink more smoothly.

Of course, when the anti-clockwise rotational impact of the sector gear 120 occurs, the lock gear 140 has a portion outside the second guide surface 112b on the left side due to the presence of the above fine play c. It rotates finely clockwise toward 112b-1, and to the right side also finely rotates clockwise toward the inner partial section 112a-2 of the first guide surface 112a. Therefore, the effect of inducing the left shock guide emboss 112 to be recessed before the rotationally impacted lock gear 140 is pushed (slid) to the inside, that is, the center can be achieved.

On the other hand, the main ground portion 144 and the ground portion 145 of the lock gear 140, the normal direction (A-A ', B-B') in each of the support surface of the holder (110 in FIG. 3) It is formed to be inclined inward to pass through the central area, in particular, the main ground portion 144 is a section that interacts with the main pressing surface portion 131 of the cam 130 as a straight line (D) as shown in FIG. Is done.

Correspondingly, the main pressing surface 131 of the cam 130 interacting with each other, as shown in FIG. 3, has an arc having a rotation center O 'at a position spaced apart from the center O of the cam 130. By being formed as a part of the elliptical arc, the result is an elliptical arc whose radius decreases continuously in the clockwise direction with respect to the center O of the cam 130.

According to the shape of the main pressing surface 131, even when the lock gear 140 in the locked position is not in the correct position and there is a slight error, that is, even when there is a fine position error between the upper and lower sides, The surface portion 131 may maintain a continuous contact support state regardless of whether the contact point with the well-known ground portion 144 is different. In this case, the contact point is always present on the straight section D of the well-known ground portion 144.

Of course, in the locked position of the lock gear 140, the constant contact of the main pressing surface portion 131 with respect to the main ground portion 144 is four springs (150 of FIG. 2) which press the cam 130 clockwise. Can be implemented by

On the other hand, since the bearing force F of the main pressing surface portion 131 with respect to the main ground surface portion 144 is exerted in the normal direction (B-B ') from the configuration in which the main pressing surface portion 131 forms an elliptical arc as described above. As shown in FIG. 3, a predetermined angle α is formed with the center O of the cam 130, and the bearing force F applied at this angle is pressed against the main ground portion 144. An angle α is formed.

This is because the cam 130 has a component force F * sinα corresponding to the sine value sinα of the pressure angle α with respect to the supporting force F even when the main pressing surface 131 and the main ground surface 144 are in contact with each other. It means that the force to penetrate clockwise with respect to the ground portion 144 as much as). That is, even if there is a slight position change in the locked state of the lock gear 140, the main pressing surface 131 always presses and presses the well-known ground portion 144 due to the above-mentioned digging force.

In addition, as described above, in FIG. 4, when the lock gear 140 in the locked state receives a biased bearing force by the main pressure surface part 131 together with the microgap c, the microgear c is rotated as much as the microgap c. As shown in FIG. 5, the cam 130 rotates finely and is further bitten into the lock gear 140 due to the presence of the pressure angle α. 130-> 130 ').

Meanwhile, in the vehicle seat recliner 100 according to the embodiment of the present invention, as shown in FIG. 2, the pair of spring receiving grooves 111 is opposite to the direction in which the guide emboss 112 protrudes. It is formed to protrude (recessed in Figure 2), the inner center of the auxiliary cam receiving groove 113 is also formed to protrude in the opposite direction to the guide emboss (112).

The pair of spring receiving grooves 111 are disposed in opposite directions with the auxiliary cam receiving groove portion 113 between them.

As shown in FIG. 6, the springs 150 are accommodated in the pair of spring receiving grooves 111, and the auxiliary cams 180 are accommodated in the auxiliary cam receiving grooves 113.

Each spring 150 has a fixed end 151 of the corresponding center is fixed to the holder side projection (111a) is fixed to the auxiliary cam 180 through the protruding end 152 is formed extending in the direction of the auxiliary cam 180 inside. Press to rotate clockwise.

In response to the left and right protruding end portions 152, the auxiliary cams 180 are provided with a plurality of arm portions 181 protruding in a radial direction and are in contact with and supported by the protruding end portions 152.

At this time, as the auxiliary cam 180 rotates counterclockwise due to the rotation operation of the recliner by the user, as shown in FIG. 7, the contact point between the arm part 181 and the protruding end 152 is the protruding end ( 152 to move toward the distal end 152a (P1-> P2) to take the configuration.

Accordingly, since the rotation pressing force of the spring 150 with respect to the auxiliary cam 180 is reduced by that, the rotational manipulation force of the user may also be less. In other words, once the unlocking operation is made by the user, it is possible to provide an operation convenience for maintaining the unlocking state with a relatively small force.

As shown in FIG. 2, the auxiliary cam 180 is inserted into the groove arc portion 135 on the cam 130 side formed by the protrusion arc portion 182 protruding in the axial direction. 130 and rotate integrally in a laminated state.

The spring 150 accommodated in the spring receiving groove 111 is disposed in a stacking relationship with the lock gear 140.

On the other hand, since the recliner 100 for the vehicle seat described above is only one embodiment for aiding the understanding of the present invention, it is difficult to understand the scope of the present invention to the technical scope of the present invention.

The scope of the invention to the technical scope is defined by the claims and equivalents described below.

Claims

A sector gear having a guide emboss protruding from each other at a predetermined interval in the circumferential direction, and a sector rim having a tooth formed on an inner circumferential surface of the guide emboss so as to be in surface contact with the holder and rotatably coupled thereto; A plurality of lock gears reciprocating between a locking position interposed between neighboring guide emboss in the circumferential direction and slidably guided in a radial direction so that an outer circumferential surface on which teeth are formed is engaged with the sector rim and a locking-off position retracting from the sector rim; And a cam mounted at the center of the holder to be rotated and pressurized to lock the lock gear in the locking position to maintain the engagement with the sector rim.

The holder,

A central auxiliary cam receiving groove portion protruding in the opposite direction of the guide emboss and a plurality of spring receiving grooves disposed in opposite directions with the auxiliary cam receiving groove interposed therebetween,

The vehicle seat recliner,

An auxiliary cam accommodated in the auxiliary cam accommodating groove to be integrally rotated by stacking with the cam;

And a plurality of springs respectively accommodated in the plurality of spring receiving grooves and disposed in a stacked relationship with the plurality of lock gears to rotate and pressurize the auxiliary cam in a predetermined direction.
The method of claim 1,

The plurality of springs has a protruding end extending in the direction of the auxiliary cam inward,

The auxiliary cam has a plurality of arms protruding in a radial direction corresponding to the protruding ends of the plurality of springs,

And the contact point of the protruding end with respect to the plurality of arm portions moves to the distal end of the protruding end as the rotationally operated angle of the cam increases.
The method of claim 1,

The guide emboss is formed with a first guide surface for guiding one side of the lock gear and a second guide surface for guiding the other side surface opposite to the one side with respect to the neighboring rock gear,

The lock gear has a main ground portion protruding inwardly and protruded inwardly on the one side and a ground surface protruding inwardly protruding inwardly to the other side,

The cam is formed on the outer circumferential surface of the main pressure surface portion for contacting the outer surface and pressurized to the outside in response to the lock gear of the locking position and the additional pressure surface portion for contacting the ground surface portion to the outside Recliner for seats.
The method of claim 3,

The first guide surface and the second guide surface of the guide emboss is in surface contact with one side and the other side of the lock gear to be slidably supported,

The first guide surface is in close contact with the one side of the lock gear in some section including the outer end, and in some section including the inner end is formed so that the micro-gauge with one side of the lock gear. On the other hand,

The second guide surface has a microgap with the other side surface of the lock gear in some section including the outer end, and in some section including the inner end is formed to closely support the other side of the lock gear. Recliner for a vehicle seat, characterized in that.
The method according to claim 3 or 4,

The main ground portion and the ground ground portion of the lock gear are formed such that the normal direction on each surface passes through the central region of the holder,

The main ground portion is a section in which the interaction with the main pressing surface of the cam is made of a straight section,

The main pressurizing surface portion interacts with the well-known ground portion through an elliptical arc whose radius is continuously reduced along the rotational direction for pressing the lock gear to the locking position when the center of the cam is referred to.

The elliptical arc is a recliner for a vehicle seat, characterized in that if the detailed position change of the lock gear in the locking position while maintaining the contact pressure while changing the contact point with the main ground portion.
The method of claim 5,

The elliptical arc is a part of the circular arc having a center of rotation at a position spaced from the center of the cam to form a predetermined pressure angle in contact with the main ground portion at the locking position of the lock gear. Recliner.