KR101677055B1

KR101677055B1 - Device recliner for vehicle

Info

Publication number: KR101677055B1
Application number: KR1020150134781A
Authority: KR
Inventors: 허윤호; 심재원; 김영준
Original assignee: 대원정밀공업(주)
Priority date: 2015-09-23
Filing date: 2015-09-23
Publication date: 2016-11-29

Abstract

The present invention relates to a recliner device for a vehicle, and its object is to provide a reclining device for a vehicle, which is provided so that a main cam, a sub cam and a lock gear are supported so as to be two points mutually so as to stably engage and maintain And to provide a reclining apparatus for a vehicle.
The present invention is characterized in that the first and second operating surfaces of the main cam press the first and second contact surfaces of the sub cam to move the sub cam in the slide groove and the pressing surface of the sub cam is contacted with and supported by the support surface of the lock gear And the lock gear is engaged with the lock gear,
The support surface of the lock gear is formed so that the first, second and third support surfaces form a waveform, and the pressing surface of the sub cam is formed to have first, second and third pressing surfaces, Or the first and second support surfaces of the lock gear are point-supported by the first and second pressing surfaces of the sub cam, so that even when an impact load is applied to the seat, , The lock gear is prevented from being pushed by the two-point contact support between the lock gear and the sub cam, and the engagement between the lock gear and the gear is maintained firmly.

Description

[0001] DESCRIPTION [0002] DEVICE RECLINER FOR VEHICLE [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a recliner device for a vehicle, and more particularly to a recliner device for a vehicle, which is provided so that the main cam, the sub cam and the lock gear are supported to each other by two points, To a reclining apparatus for a vehicle.

Generally, a recliner applied to a seat of a vehicle is a mechanism for rotating the seatback from the seat cushion or enabling the position of the pivoted seatback to be fixed, thereby providing convenience to the passenger in terms of the position of the seatback .

Such a recliner should be designed in such a way that the positionally adjusted fixed state can be safely maintained even if any impact is applied in a state where the positionally adjusted seat back is fixed. However, in the conventional recliner, an impact load is generated in front of or behind the seat There arises a problem in terms of safety such as a phenomenon in which the engagement between the gear rim and the lock gear is partially disengaged due to an incomplete locked state of the engagement between the internal gear of the gear rim and the external gear of the lock gear.

1, a conventional conventional recliner 100 'has a receiving groove (not shown) formed on one side thereof, and an inner tooth 102 is formed on a circular rim portion of the receiving groove. And a guide plate 140 is mounted on one side of the gear rim 110 to protrude from the gear rim 110 and a plurality of guide blocks 142 that form a lock gear guide groove 141 on the other side. A cam 120 interposed between the guide plate 140 and the gear rim 101 and having a central portion connected to the lever rotation shaft 150 and an outer peripheral surface inserted into the lock gear guide groove 141, And a lock gear 130 formed with a pinion gear 131.

The conventional recliner 100 'having the above-described structure rotates the lever rotation shaft 150 in the clockwise direction and rotates the lever rotation shaft 150 by the both ends of the cam 120, The inner side surface of the lock plate 130 is pushed toward the outer side of the guide plate 140 and the lock gear 130 is moved along the gear guide groove 141 so that the pinion gear 131 of the lock gear 130 is engaged with the gear rim 110, respectively.

However, since the structure of the recliner 100 'is structured such that the lock gear 130 is slidably moved along the lock gear guide groove 141, both sides of the lock gear 130 and the lock gear guide groove 141 are formed Not only a fine clearance due to the operating clearance is always present between the inner side surfaces of the guide block 142 that is engaged with the guide block 142 and the lock gear 130 is repeatedly slid along the lock gear guide groove 141, 130 and the inner side surface of the guide block 142 is worn on both sides of the lock gear 130 and the inner side surface of the guide block 142. As the lock gear 130 is used for a long time, And the guide block 142 becomes larger and the seat back is shaken around the rotation axis of the backrest, thereby causing discomfort to the user.

When the external force is applied to the conventional recliner 100 ', a force applied to the lock gear 130 by the external force is transmitted to one of the guide blocks 142 located at one side or the other side of the lock gear 130 The lock gear 130 or the guide block 142 may be deformed as a whole when the lock gear 130 or the guide block 142 is concentrated on the side surface of the guide block 142, The coupling state of the gear and the lock gear is deteriorated due to the deformation of the gear, and micro-flow is generated toward the center of the cam along the entirely deformed guide block surface, Fatal structural defects are lost, such as the loss of the ability to hold the back of the city.

In the conventional recliner 100, the cam 120 supports the lock gear 130 in a very small area only at one position, so that the stress is concentrated on the cam 120, There are various problems such that the shape is very easily deformed or broken.

Patent Registration No. 10-1468420 (Nov.

An object of the present invention is to provide a reclining apparatus for a vehicle in which a main cam, a sub cam and a lock gear are provided so as to be supported by two points of each other so that a root can be stably meshed and held in a lock gear when a locking and an external impact load are generated will be.

The present invention is characterized in that the first and second operating surfaces of the main cam press the first and second contact surfaces of the sub cam to move the sub cam in the slide groove and the pressing surface of the sub cam is contacted with and supported by the support surface of the lock gear And the lock gear is engaged with the lock gear,

The support surface of the lock gear is formed so that the first, second and third support surfaces form a waveform, and the pressing surface of the sub cam is formed to have first, second and third pressing surfaces, Or the first and second support surfaces of the lock gear are point-supported by the first and second pressing surfaces of the sub cam, so that even when an impact load is applied to the seat, , The lock gear is prevented from being pushed by the two-point contact support between the lock gear and the sub cam, and the engagement between the lock gear and the gear is maintained firmly.

The present invention is characterized in that the first, second and third support surfaces of the lock gear and the first, second and third pressing surfaces of the sub cam have a waveform, and the second support surface and the third pressing surface have different radii, Even if an impact load is generated in the forward and backward directions of the rim, the support surface of the lock gear is always brought into contact with the pressing surface of the sub cam in an advantageous manner so that the pushing action of the lock gear is minimized.

In the present invention, by the rotation of the control disk by the elastic force of the spring or the rotation of the control disk by the main cam, a plurality of lock gears are held in the locking hole direction (the internal gear in the gear rim) So that locking or unlocking can be performed quickly and accurately by a simple operation.

Since the plurality of radially distributed lock gears are slid simultaneously and the external teeth of the lock gear are engaged with the internal gears of the gear rim, an equal support load is maintained in each lock gear, thereby improving the overall engagement rigidity have.

The present invention is characterized in that one side of the sub cam is in close contact with one side surface of the guide block and the other side of the lock gear which is in contact with and supported by the sub cam is in close contact with the other side surface of another guide block, So that temporary unlocking phenomenon, which may occur between the internal gear of the gear rim and the external gear of the lock gear, does not occur.

According to the present invention, the gear insertion hole formed between the guide blocks of the guide plate and the lock gear and the sub cam inserted therein can have clearance tolerances, thereby facilitating assembly of the lock gear and the sub cam.

In the present invention, a plurality of lock gears are simultaneously slidable by a single spring, so that the structure is simple and has excellent assemblability.

In addition, the first, second and third support surfaces of the lock gear and the first, second and third pressing surfaces of the sub cam form a waveform (curved surface), and the cam and each sub cam are held in contact with each other at two points, This is because the rotation force of the cam is designed considering the up-and-down linear movement of the lock gear and the sub cam in the rim direction and the left and right linear movement of the guide block, that is, the contact surface between the lock gear and the sub cam must be curved, There is an effect that two contact points are maintained.

In addition, as the guide block is deformed due to the impact, the coupling state between the gear and the lock gear becomes poor, and a waveform (curved surface) is formed for a phenomenon in which a microcurrent flows toward the center of the cam along the entirely deformed guide block surface, In the case of biaxial impact, the guide block is deformed into a double end by the lock gear, preventing the lowering of the coupling, thereby firmly maintaining the backrest holding function during impact.

FIG. 1 is an illustration showing a conventional recliner construction
Fig. 2 is an explanatory view showing an exploded configuration of the recliner device according to the present invention. Fig.
3 is another example showing a disassembled configuration of the recliner device according to the present invention
4 is an exemplary view showing a configuration of a guide plate according to the present invention.
5 is an exemplary view showing a configuration of a main cam according to the present invention.
6 is a view showing an example of the structure of the lock gear according to the present invention
FIG. 7 is an exemplary view showing a configuration of a sub cam according to the present invention. FIG.
8 is an exemplary diagram showing a configuration of a control disk according to the present invention.
Figure 9 is an exemplary diagram illustrating the operating relationship of the present invention (locking)
10 is an exemplary diagram showing an operating relationship when a forward external force is generated according to the present invention
11 is an exemplary diagram showing an operating relationship when a rear external force is generated for the present invention
12 is an exemplary view showing the main cam operation of the locking solution presentation according to the present invention;
FIG. 13 is an exemplary diagram showing a configuration in the unlocked state according to the present invention
FIG. 14 is an exemplary diagram showing an operating relationship of the control disk according to the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a view showing an exploded configuration of the recliner according to the present invention, FIG. 3 is a view showing another embodiment of the recliner apparatus according to the present invention, and FIG. 6 is a view showing a configuration of a lock gear according to the present invention. FIG. 7 is a view showing an example of a configuration of a sub cam according to the present invention, FIG. 5 is a view showing the configuration of a main cam according to the present invention, FIG. 8 is an exemplary diagram showing the configuration of a control disk according to the present invention, and FIG. 14 is an exemplary diagram showing an operating relationship of a control disk according to the present invention.

A guide plate (10) fixed to the seat cushion frame and having a plurality of slide grooves (11) radially formed therein; A gear rim (30) coupled by the guide plate (10) and the clamp ring (20) and having an internal gear (31) formed on its inner peripheral surface; A lock gear 40 inserted into the slide groove 11 of the guide plate 10 so as to slide back and forth and having an external gear 41 meshing with the internal gear 31 of the gear rim; A lever rotation shaft 50 installed to penetrate the guide plate 10 and the center of the gear rim 30; A main cam (60) having a lever rotation shaft (50) formed therein and having a plurality of pressing projections (61) on an outer peripheral surface thereof; Is inserted into the slide groove 11 so as to be positioned between the main cam 60 and the lock gear 40 and supported on both sides by the pressing projection 61 of the main cam so that the lock gear 40 is engaged with the internal gear A sub cam (70) which supports and presses in two directions in a direction of the sub cam (70); A control disc 80 provided so as to be positioned between the guide plate 10 and the gear rim 30 and closely contacting the main cam 60 with the sub cam 70 and the lock gear 40 in the direction of the guide plate 10, ; &Lt; / RTI >

Is radially positioned between the guide plate 10 and the gear rim 30 by the rotation of the control disc 80 by the elastic force of the spring or the rotation of the control disc 80 by the rotation of the main cam 60 The plurality of lock gears 40 and the sub cams 70 are reciprocally slid in the slide groove 11 so that the external gears 41 of the lock gear are engaged with the internal gears 31 of the gear rim to maintain the locked state , The external gear difference 41 of the lock gear is separated from the internal gear 31 of the gear rim to maintain the lock releasing.

The present invention is also directed to a disc drive apparatus which is installed to be positioned between a gear rim 30 and a control disc 80 and which has one end inserted through a guide hole 81 of a control disc and inserted into a spring hole 12 formed in a guide plate 10 And a return spring (90) supported at the other end thereof in contact with the control disc (80).

The gear rim 30 includes a fixing hole 32 formed at the center thereof to be assembled by being inserted into a rotation shaft of a backrest (not shown), a receiving groove 33 formed to have a predetermined depth to communicate with the fixing hole 32, An internal gear 31 formed along the rim of the receiving groove 33 and located on the inner peripheral surface of the gear rim and a control disc 80 protruding in the receiving groove 33, And an urging jaw 34 for urging the sub cam 70 toward the sub cam 70 side.

The guide plate 10 is coupled to the seat cushion frame and is coupled to the gear rim 30 by the clamp ring 20 so that the lever rotation axis 50 is located at the center, A plurality of guide blocks 14 protruding from the shaft hole 13 by a predetermined distance in a radial direction and a slide groove 11 formed between the guide blocks 14 ).

That is, a plurality of guide blocks 14 are protruded from the guide plate 10 so as to be spaced apart from each other by a predetermined distance, and a space between guide blocks spaced by a predetermined distance corresponds to the slide grooves 11.

The side walls 14a and 14b of the guide block 14 facing each other are formed to be parallel to each other and one end of the return spring 90 is inserted into the spring hole 12 Is formed.

The lever rotation shaft 50 penetrates the guide plate 10 and the center of the gear rim 30, that is, the shaft hole 13 of the guide plate 10 and the fixing hole 32 of the gear rim 30, City).

The main cam 60 is rotated by the lever rotation shaft 50 to press and slide the plurality of sub cams 70 simultaneously so that the lever rotation shaft 50 So as to reciprocate in the longitudinal direction of the seat.

5, the main cam 60 includes a body 62 formed with a lever hole 64 in which a lever rotation axis 50 is formed, and a protrusion 62 formed on one side of the body 62 And a plurality of pressing protrusions 61 protruding from the outer circumferential surface of the body 62 to be in pressing contact with the sub cam 70. The engaging protrusions 63 engage with the cam holes 82 of the control disc. The pressing protrusions 61 protrude in correspondence with the number of the sub cams 70 and include first and second operating surfaces 61a and 61b contacting the sub cams 70. [

The main cam 60 thus configured is rotated in the unlocking direction by the lever rotation shaft 50 or rotated in the locking direction by the rotation of the control disk 80 in accordance with the elastic spring force.

The lock gear 40 is inserted between the gear rim 30 and the guide plate 10 so as to be slidably reciprocated in the slide groove 11 of the guide plate, A gear train 41 formed on one side of the gear rim so as to be engaged with the gear teeth 31 of the gear rim and a support surface formed on the other side opposite to the gear train 41, 42 and a connecting protrusion 43 protruding from one side surface of the outer toothbrush body 41 so as to be positioned between the toothbrush body 41 and the supporting surface 42.

The support surface 42 has a first support surface 42a formed on one side so as to have a small diameter and a second support surface 42b formed on the other side so as to be symmetrical with respect to the first support surface 42a, 3 support surface 42c and a second support surface 42b formed in an arc shape and having a predetermined radius to connect the first support surface 42a and the third support surface 42c.

The radius r2 and the arc length LC2 of the second support surface are formed so as to correspond to the first and second support surfaces 42a, 42b, and 42c, 3, the radius r1, r3 of the support surface, and the arc length LC1, LC3.

The support surface 42 of the lock gear 40 constructed as described above is formed such that both sides thereof are symmetrical with respect to the center line CL1. That is, the first and third support surfaces 42a and 42c are formed to be symmetrical with respect to the center line CL1 of the second support surface.

The second support surface 42b is convex in the outer tooth difference direction and the connection protrusion 43 is located at the apex T1 and the second support surface 42b is located on the first support surface 42a. And the downward curved surface 42b-2 is formed from the apex of the second support surface 42b to the third support surface 42c up to the apex T1 of the first support surface 42b.

As shown in FIG. 14, the coupling protrusion 43 is inserted into one side of the control disc 80, and when the main cam is rotated in the unlocking direction, a control disc 80 And moves the lock gear 40 in the direction of the main cam. The connection protrusions 43 are described together in the description of the control disc 80 to be described later.

The sub cam 70 is inserted into the slide groove 11 of the guide plate so as to be positioned between the lock gear 40 and the main cam 60 and is engaged with the slide groove 11 by the rotation of the main cam 60 So that the external gear difference 41 of the lock gear is engaged with the internal gear 31 of the gear rim.

7, the sub cam 70 includes a pressing surface 71 supported by the support surface 42 of the lock gear in a two-point contact with the pressing projection 61 of the main cam 60, (72).

The contact surface 72 has a first contact surface 72a on which the first operation surface 61a formed on the pressing projection 61 of the main cam 60 is contactably supported and a second contact surface 72b on which the second operation surface 61b is contactably supported And a clearance groove (72c) formed between the first contact surface (72a) and the second contact surface (72b) and formed at a predetermined depth convex in the direction of the pressing surface (71) The first and second contact surfaces 72a and 72b are formed with a geometric curved surface so that the contact surface 72a, the clearance groove 72c and the second contact surface 72b are continuous. 2 operation surfaces 61a and 61b are simultaneously contacted.

The clearance groove 72c is formed in the outer peripheral surface of the gear rim 30 so as to be separated from the internal gear 31 of the gear rim 30 when the main cam 60 rotates for unlocking, In order to prevent the main cam 40 and the sub cam 70 in contact with the main cam from interfering with the pressing projection 61 of the main cam, The lock gear 40 pushes the sub cam 70 by the guide hole 81 of the control disc 80 while the second operation surface 61b is inserted into the clearance groove 72c, And is formed between the first and second contact surfaces 72a and 72b so as to be convex in the direction of the pressing surface.

The pressing surface 71 has a first pressing surface 71a formed at one side and a third pressing surface 71c formed at the other side so as to have a predetermined tilt angle so that the first pressing surface 71a has a predetermined inclination angle, And a second pressing surface (71b) formed in an arc shape and having a predetermined radius to connect the third pressing surface (71c)

The second pressing surface 71b is convexly formed in the lock gear direction so as to have the apex T2 and the second pressing surface 71b is formed at the apex of the second pressing surface 71b T2 from the apex of the second pressing surface 71b to the third pressing surface 71c by the downward curved surface 71b-2.

The sub cams thus formed are formed so that both sides of the sub cam are asymmetric with respect to the center line CL2, so that the pressing surface is supported in contact with the supporting surface of the lock gear 40 by two points.

That is, the first, second, and third pressing surfaces 71a, 71b, 71c of the sub cam have shapes corresponding to the first, second, and third support surfaces 42a, 42b, 42c of the lock gear,

The radius r4 of the second pressing surface 71b is formed to have a radius smaller than the radius r2 of the lock gear second supporting surface 42b and the length L1 of the first pressing surface 71a Of the sub cam 70 is set to be shorter than the length L3 of the third pressing surface 71c by the main cam 60 in a state in which the sub cam 70 in the slide groove 11 is assembled, Is moved to come into pressure contact with the support surface 42 of the lock gear 40,

One side of the upward curved surface 71b-1 of the sub cam second pressure surface 71b is pointly supported on one side of the upward curved surface 42b-1 of the lock gear second support surface 42b, and the third support surface The third pressing surface 71c of the sub cam 70 is point-supported by the first and second cams 42a and 42c so that the sub cam and the lock gear are held in contact with each other by two points. At this time, the first pressing surface 71a of the sub cam and the first supporting surface 42a of the lock gear are kept spaced apart.

8, the control disc 80 is fixed by being inserted into a cam hole 82 formed at the center of the coupling protrusion 63 of the main cam 60 so as to be rotated in conjunction with the main cam 60, A plurality of guide holes 81 through which the locking projections 43 of the lock gear are inserted are formed in the center of the cam hole 82.

The plurality of guide holes 81 have a guide surface 81a which is in contact with the coupling protrusion 43 of the lock gear and the guide surface 81a is provided with a lever rotation axis 50 in the circumferential direction opposite to the rotating direction of the control disc 80. The control disc 80 is rotated in the circumferential direction. That is, when the control disc is rotated in the unlocking direction, the guide hole 81 of the control disc is rotated while the guide surface 81a is in contact with the coupling protrusion 43 of the lock gear, The connecting protrusion 43 is moved in the direction of the main cam 60 by the pressing projection 81a.

The control disc 80 has a plurality of spring support protrusions 83 and 84 protruding from the guide hole 81 so as to be positioned between the cam hole 82 and the guide hole 81, The jaw 83 is supported by one end of the return spring 90 in contact with it. At this time, the spring supporting step 83 is protruded to be positioned on the side of the cam hole 82 so that the spring supporting step 84 is located on the guide hole 81 side.

The return spring 90 applies an elastic force so that the external gear 41 of the lock gear is gear-engaged with the internal gear 31 of the gear rim. The one end 91 of the return spring 90 is connected to the spring support jaw 83 of the control disk And is installed between the gear rim 30 and the control disc 80 so that the other side end 92 is inserted into the spring hole 15 of the guide plate. That is, the other end 92 of the spring passes through the guide hole 81 of the control disk and is inserted into the spring hole 12 formed in the guide plate.

The return spring 90 installed as described above rotates the control disc 80 and the main cam 60 coupled thereto by means of an elastic force to slide the sub cam 70 in the slide groove 11, (40) to gear-engage the external gear (41) of the lock gear and the internal gear (31) of the gear rim.

The return spring 90 is configured to pass between a spring support protrusion 83 protruding from one side of the control disc 80 and another spring support protrusion 84 protruding from the control disc 80, When the return spring 90 is compressed and operated by the rotation of the main shaft 60, one side of the return spring 90 to be compressed is contacted with the spring supporting step 84 so as to prevent interference with the rotation of the main cam .

According to the present invention configured as described above, the outer tooth difference gear 41 of the lock gear is coupled to the internal gear 31 of the gear rim by the rotation of the control disc by the elastic force (operating force) of the return spring, The control disc is rotated in the reverse direction when the control disc is locked by the rotation of the main cam along the rotation shaft of the lever so that the external gear difference 41 of the lock gear and the internal gear 31 of the gear rim are separated from each other , The locking of the position of the seat back is released.

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

FIG. 9 is an exemplary diagram showing an operating relationship of the present invention, FIG. 10 is an exemplary diagram showing an operating relationship when a front external force is generated according to the present invention, and FIG. 11 is an example FIG. 12 is an exemplary view showing the main cam operation of the locking solution presentation according to the present invention, FIG. 13 is an exemplary view showing the configuration in the unlocked state according to the present invention, FIG. 4 is a view showing an example of the operating relationship of FIG.

- Locked condition

The control disc 80 and the main cam 60 coupled to the control disc 80 are rotated in the direction A by the elastic force of the return spring 90 and the first and second operation The surfaces 61a and 61b are in contact with the first and second contact surfaces 72a and 72b of the sub cam so that the sub cam 70 slides along the slide groove 11 and the sub cam 70 The pressing surface 71 of the sub cam presses the support surface 42 of the lock gear.

At this time, the sub cam 60 receives a force in the direction B by the rotation of the main cam pressing protrusion 61 and the contact with the first and second operating faces 61a and 61b formed on the pressing protrusion 61 As a result, the sub cam 60 is slid in the direction of the lock gear along the slide groove 11 while being pushed in the C direction.

When the sub cam 60 is slid to one side and the pressing surface 71 of the sub cap presses the support surface 42 of the lock gear, the upward curved surface 71b of the sub cam second pressing surface 71b -1 is point-contacted to the upward curved surface 42b-1 of the lock gear second supporting surface 42b and the third pressing surface 71c of the sub cam is point contacted with the third supporting surface 42c of the lock gear The lock gear 40 is subjected to a force in the direction D and is consequently slid along the slide groove 11 while being pushed in the direction E so that the pinion gear 41 of the lock gear is engaged with the internal gear 31 of the gear rim. Thereby maintaining the locked state.

9, one side surface of the lock gear is in close contact (F) with the side wall 14a of the guide block (the side wall positioned in the forward direction in the slide groove) The one side surface of the cam is kept in a state of being closely attached (G) to the side wall (14b, the side wall positioned in the backward direction in the slide groove) of another guide block.

That is, a clearance gap is formed between the lock gear 40 and the slide groove 11 into which the lock gear is inserted and slides for the purpose of smooth machining and operation, However,

Since the side surfaces of the lock gear 40 and the sub cam 70 are in close contact with the side walls 14a and 14b of the different guide blocks to maintain a locked state, .

- External force generation (forward direction)

When an impact load is generated in the forward direction (H direction) of the gear rim, as shown in Fig. 10 (a), the lock gear 40 is moved in the forward direction H direction), and the lock gear 40 is moved in the forward direction (H direction) in the slide groove 11 by the transmitted force.

10 (b), when the lock gear 40 is moved in the forward direction (H direction), the guide blocks 14 that are in contact with the lock gear 40 are engaged with the double ends P1 and P2 The lock gear first support surface 42a is brought into contact with the first pressing surface 71a of the sub cam and the one end of the downward curved surface 42b-2 of the lock gear second support surface 42b Is brought into point contact with one side of the downward curved surface 71b-2 of the sub cam second pressure surface 71b so that the support surface 42 of the lock gear is supported by the pressure surface 71 of the sub cam at two points.

When the two points are supported by the two points, the force direction K is generated at the coupling side due to the upward shape of the contact portions by the continuous impact external force. At this time, The damage P1 due to the lock gear and the damage P2 due to the sub cam 70 are generated as shown in Figure 10 (b) (Or step) S1 is generated between the lock gear 40 and the main cam, so that the flow of the engagement of the lock gear 40 to the main cam side is restricted by the partition (or step).

That is, according to the present invention, when an impact load is generated in the forward direction (H direction) of the gear rim 30, occurrence of jamming due to the contact shape of the sub cam 70 and the lock gear 40, As a result of the step, the pushing force of the lock gear toward the main cam is remarkably improved, so that the shock has an excellent function for improving the safety of the seat back.

- External force generation (rearward direction)

11 (a), when the impact load is generated in the backward direction (I direction) of the gear rim, the lock gear also moves in the backward direction (I direction) .

When the lock gear 40 is moved in the backward direction (direction I) by the impact load, the upward curved surface 42b-1 of the lock gear second support surface is located on the upward curved surface 71b- 1), the third supporting surface of the lock gear is point-contacted to the third pressing surface of the sub cam, and the supporting surface 42 of the lock gear is supported by two points on the pressing surface 71 of the sub cam The lock gear and the sub cam are moved while the dual blocks P3 and P4 are generated in the guide block 14 as shown in FIG. 11 (b)

When the lock gear 40 and the sub cam 40 are supported by two points, the force direction L is generated at the engagement side due to the upward directional shape of the two points due to the continuous impact external force. A difference between the pushing direction of the sub cam 70 and the thrust amount of the sub cam 70 is generated so that the damage P3 caused by the lock gear and the damage P4 (Or a step S2) is generated between the lock gear 40 and the main cam side, and the flow in which the lock gear 40 is disengaged from the main cam side by the partition wall (or stepped portion) is limited.

That is, according to the present invention, when an impact load is generated in the forward direction (I direction) of the gear rim 30, occurrence of jamming toward the engagement side due to the contact shape of the sub cam 70 and the lock gear 40, As a result, the rocking gear is remarkably improved in the direction of the main cam, so that the shock is excellent for improving the safety of the seat back.

- Unlock

12 to 14 show the unlocked state of the reclining device in the locked state. When the lever rotation shaft 50 is rotated in the direction A ', the main cam 60 and the control disc 80 are also rotated in the direction A' The first and second actuating surfaces 61a and 61b formed on the pressing protrusion 61 of the main cam by the rotation of the main cam 60 in the direction of A ' The pressing force of the main cam 60 which has been detached from the first and second contact surfaces 72a and 72b of the sub cam 70 and applied to the sub cam 70 is eliminated.

At this time, the guide surface 81a of the guide hole 81 formed in the control disc 80 is inclined downwardly in the direction of A '. When the pressing force applied to the sub cam 70 is released, The lock protrusion 43 of the lock gear is brought into contact with the guide surface 81a of the lock gear 81 so that the lock gear 40 is slid along the slide groove 11 in the direction of the main cam 60.

The sub cam 70 is also moved toward the main cam 60 by the movement of the lock gear 40 and the external gear 41 of the lock gear 40 is separated from the internal gear 31 of the gear rim , The locking is released.

Fig. 14 (a) shows the positional state of the control disc in the locked state shown in Fig. 12, and Fig. 14 (b) shows the rotated state of the control disc in the unlocked state shown in Fig.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): guide plate (11): slide groove
(12): spring hole (13): shaft hole
(14): guide block (20): clamp ring
(30): gear rim (31): internal gear
(32): fixing hole (33): receiving groove
(34): close jaw (40): a lock gear
(41): External tooth roller (42): Support surface
(43): connection projection (50): lever rotation axis
(60): main cam (61): pressing projection
(62): body (63): engaging projection
(61a): first operating surface (61b): second operating surface
(70): sub cam (71): pressing face
(72): contact surface (80): control disc
(81): Guide hole (82): Cam hole
(83): spring support jaw (90): spring
(91): one end (92): the other end
(100): Recliner

Claims

The first and second operating surfaces of the main cam press the first and second contact surfaces of the sub cam to move the sub cam in the slide groove and the pressing surface of the sub cam is held in contact with the support surface of the lock gear, Respectively,
The support surface 42 of the lock gear includes a first support surface 42a formed on one side so as to have a small diameter and a third support surface 42c formed on the other side so as to be symmetrical with respect to the first support surface 42a, A second support surface 42b having a predetermined radius and formed in an arc shape to connect the first support surface 42a and the third support surface 42c is formed to have a waveform,
The pressing surface (71) of the sub cam includes a first pressing surface (71a) formed on one side so as to have a predetermined inclination angle, a third pressing surface (71c) formed on the other side so as to have a predetermined inclination angle, And a second pressing surface 71b formed in an arc shape and having a predetermined radius to connect the third pressing surface 71a and the third pressing surface 71c,
The second and third supporting surfaces of the lock gear are point-supported by the second and third pressing surfaces of the sub cam when the seat lock or the impact load is applied to the seat, Point support on the pressing surface,
So that the lock gear is prevented from being pushed by the two-point contact of the lock gear and the sub cam, so that the engagement between the lock gear and the gear is maintained firmly.

The method of claim 1,
The vehicle recliner device (1)
A gear rim (30) coupled by the guide plate (10) and the clamp ring (20) and having an internal gear (31) formed on its inner peripheral surface;
A lock gear 40 inserted into the guide plate 10 so as to slide reciprocally into a plurality of slide grooves 11 formed radially and engaging the teeth of the gear rim with external teeth;
A main cam (60) having a lever rotation axis (50) formed therein and having a plurality of pressing projections (61) having first and second operating surfaces on its outer circumferential surface;
First and second contact surfaces which are inserted into the slide groove 11 so as to be positioned between the main cam 60 and the lock gear 40 and which are in contact with and supported by the first and second operating surfaces of the main cam, A sub cam (70) having a pressure surface supported by two points on the support surface;
A control disc 80 coupled to rotate integrally with the main cam 60 to closely contact the sub cam 70 and the lock gear 40 in the direction of the guide plate 10;
And a return spring (90) having one end inserted into the spring hole (12) formed in the guide plate (10) and the other end thereof being contacted and supported by the control disc (80) .

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The method of claim 1,
The radius r2 and the arc length LC2 of the second support surface are integrally connected to each other so that the first, second and third support surfaces 42a, 42b, , The radius (r1, r3) of the supporting surface and the arc length (LC1, LC3)
The first, second, and third pressing surfaces 71a, 71b, 71c of the sub cam have shapes corresponding to the first, second, and third support surfaces 42a, 42b, 42c of the lock gear, The radius r4 of the surface 71b is formed to have a smaller radius than the radius r2 of the lock gear second supporting surface 42b and the length L1 of the first pressing surface 71a is set to be smaller than the radius Is formed to be shorter than the length L3 of the surface 71c,
When the pressing surface 71 of the sub cam is moved by the main cam 60 so as to press the supporting surface 42 of the lock gear 40 in a state in which the sub cam 70 in the slide groove 11 is assembled The second pressing surface 71b of the sub cam 70 is point supported on one side of the second supporting surface 42b of the lock gear and the third pressing surface 71b of the sub cam 70 is supported on the third supporting surface 42c of the lock gear, And the pressure surface (71c) is point-supported.

The method of claim 1,
The second supporting surface 42b is convexly formed in the outer tooth difference direction and the connecting protrusion 43 is located at the apex portion of the second supporting surface 42b. From the first supporting surface 42a to the apex T1 of the second supporting surface, And a downward curved surface 42b-2 from the apex (T1) of the second support surface to the third support surface 42c,
The second pressing surface 71b is convexly formed in the lock gear direction so as to have the apex T2 and the second pressing surface 71b is formed at the apex of the second pressing surface 71b Is formed to have an upward curved surface (71b-1) up to the third pressing surface (71b-2) and a downward curved surface (71b-2) from the apex of the second pressing surface (71b) to the third pressing surface (71c).

The method of claim 2,
The control disc 80 is formed with a plurality of guide holes 81 having a guide surface 81a which is in contact with the coupling protrusion 43 of the lock gear,
A plurality of spring support protrusions 83 and 84 protruding from one end of the return spring 90 in the assembling direction of the gear rim 30 so as to be positioned between the guide hole 81 and the cam hole 82 are formed The recliner device for a vehicle.