JP2021109486A - Angle adjustment device and vehicle seat comprising angle adjustment device - Google Patents

Abstract

To easily change an angular range, within which a lock is maintained in a released state, in an angle adjustment device.MEANS FOR SOLVING THE PROBLEM: An angle adjustment device 14 has: a first rotor 41 coupled to a first component 18; a second rotor 42 which is rotatably supported on the first rotor, and is coupled to a second component 21; a lock member 43 which is movable between a lock position and a release position; an energization component 44 which energizes the lock member toward the lock position; an operation part 45 which is so provided on the second rotor as to be displaceable between an initial position and an operation position, and moves from the initial position to the operation position, thereby moving the lock member to the release position against energization force of the energization component; and a first contact part 71 which is provided on the first component or the second component, and contacts the operation part to maintain the operation part at the operation position when an angle of the second component with respect to the first component falls within a prescribed first angular range.SELECTED DRAWING: Figure 8

Description

The present invention relates to an angle adjusting device and a vehicle seat provided with the angle adjusting device.

Patent Document 1 discloses an angle adjusting device for adjusting the angle between the seat cushion of a vehicle seat and the seat back. The angle adjusting device is provided between the base plate coupled to the seat cushion, the gear plate rotatably supported by the base plate, and the gear plate coupled to the seat cushion, and the base plate and the gear plate. A lock gear that can be moved between a lock position that engages both to regulate the relative rotation of the base plate and gear plate and a release position that is away from one of the base plate and gear plate and allows relative rotation of the base plate and gear plate. A cam that is provided on the base plate so that it can be displaced between the initial position and the operation position and allows the lock gear to move to the release position by moving from the initial position to the operation position, and the cam is urged to the initial position. It has a spring and an operating lever coupled to a cam. When the user operates the operation lever, the lock gear moves from the lock position to the release position, and the relative rotation of the base plate and the gear plate becomes rotatable.

Further, the lock gear has a protrusion, and the gear plate has a protrusion support. When the angle of the gear plate with respect to the base plate is within a predetermined angle range, the protrusion engages with the protrusion support to restrict movement to the locked position. As a result, the angle adjuster is maintained in an unlocked state when the angle of the gear plate with respect to the base plate is within a predetermined angle range. As a result, for example, when the seat back is in a predetermined forward tilted state with respect to the seat cushion, the angle adjusting device is in a unlocked state, and the seat back can be easily tilted.

JP-A-2018-192921

The angle adjusting device according to Patent Document 1 needs to change the shape of the protrusion support portion inside the angle adjusting device in order to change the angle range maintained in the unlocked state. Therefore, in the angle adjusting device according to Patent Document 1, it is difficult to change the angle range maintained in the unlocked state.

In view of the above background, it is an object of the present invention to facilitate the change of the angle range maintained in the unlocked state in the angle adjusting device. Another object of the present invention is to provide a vehicle seat provided with an angle adjusting device that can easily change the angle range that is maintained in the unlocked state.

In order to solve the above problems, the present invention is interposed between the first member (18) and the second member (21), and rotatably supports the second member with respect to the first member. At the same time, a first rotating body (41), which is an angle adjusting device (14) capable of maintaining the second member at an arbitrary angle with respect to the first member, and which is coupled to the first member, and the first member. A second rotating body (42) rotatably supported by the one rotating body and coupled to the second member, and the first rotating body provided between the first rotating body and the second rotating body. From a lock position that engages with both the rotating body and the second rotating body to regulate the relative rotation of the first rotating body and the second rotating body, and from one of the first rotating body and the second rotating body. A locking member (43) that is separated and movable between the first rotating body and the release position that enables relative rotation of the second rotating body, and an urging that urges the locking member toward the locking position. The urging member (44) is provided on the second rotating body so as to be displaceable between the initial position and the operating position, and by moving from the initial position to the operating position, it resists the urging force of the urging member. The operation unit (45) for moving the lock member to the release position and the angle of the second member with respect to the first member provided on the first member or the second member are within a predetermined first angle range. It has a first contact portion (71) that abuts on the operation portion and maintains the operation portion at the operation position.

According to this aspect, when the angle of the second member with respect to the first member is in the first angle range, the operation portion abuts on the first contact portion and is maintained at the operation position, and the lock member is maintained at the release position. NS. The first contact portion is a member provided on the first member or the second member, and can be easily attached and changed. Therefore, in the angle adjusting device, it is possible to easily change the angle range maintained in the unlocked state.

In the above aspect, the operation unit is rotatably provided between the initial position and the operation position, and the first contact portion has a separated position away from the operation unit and the operation unit. The first contact is provided on the second member so as to be rotatable between the pressing position and the operating position, and the angle of the second member with respect to the first member is within the first angle range. It is preferable to have a second contact portion (75) that abuts the portion and pushes the first contact portion toward the pressing position side.

According to this aspect, the size of at least one of the operating portion and the first contact portion can be reduced.

In the above aspect, the first contact portion has a fan-shaped plate (71A) extending in the radial direction from its own rotation shaft, and the rotation shaft (B) of the plate is the rotation of the operation portion. The side edge portion (71D) arranged parallel to the moving shaft (A) and extending in the radial direction of the plate abuts on the second contact portion, and the arc portion (71C) of the plate abuts on the operation portion. In this state, the operation unit may be maintained at the operation position.

According to this aspect, in a state where the first contact portion is in contact with the second contact portion, the first contact portion rotates with respect to the second member, so that the second member is in contact with the first member. Can rotate. Further, since the first contact portion is in sliding contact with the operation portion in the arc portion, the first contact portion can rotate with respect to the second member in a state of being in sliding contact with the operation portion. As a result, the second member can rotate with respect to the first member while maintaining the state in which the first contact portion is in contact with the operation portion.

In the above aspect, it is preferable to have a second urging member (73) that urges the first contact portion toward the separation position side.

According to this aspect, the position of the first contact portion is determined, and the vibration of the first contact portion and the collision between the first contact portion and another member can be suppressed.

In the above aspect, when the first rotating body or the second rotating body is in a second angle range including an angle range different from the first angle range, the angle of the second member with respect to the first member is in the second angle range. It is preferable to have a regulating portion that abuts on the lock member and maintains the lock member in the released position.

According to this aspect, the range of angles at which the lock is released can be extended.

In the above aspect, the operation unit is arranged between the first rotating body and the second rotating body, and is located at the first rotation position for pushing the lock member to the lock position and at the release position of the lock position. A cam (47) that can rotate between the second rotation position to be pushed, a first shaft (48) that extends along the rotation axis of the cam and projects outward from the second rotating body, and the first shaft. It is preferable that the plate has an operating lever (49) provided at the tip of the shaft and extends in the radial direction of the first shaft, and the plate abuts on the operating lever.

According to this aspect, since the plate and the operating lever are arranged outside the first rotating body and the second rotating body, the structure of the angle adjusting device can be simplified.

In the above aspect, the operating lever may have a contact pin (49B) extending parallel to the first shaft, and the first contact portion may be in sliding contact with the arc portion at the contact pin.

According to this aspect, the structure of the contact portion between the first contact portion and the operation lever can be simplified.

Another aspect of the present invention comprises the above angle adjusting device (14), wherein the first member is a base (18) provided on the floor (15) or a seat cushion frame provided on the floor. The second member is a vehicle seat (1) which is a seat back frame (5).

According to this aspect, in the vehicle seat, the unlocked state can be maintained when the angle of the seat back with respect to the seat cushion frame is within a predetermined angle range.

In the above embodiment, when the seat back frame is in a predetermined forward tilted state with respect to the floor, the first contact portion abuts on the operation portion to maintain the operation portion at the operation position. good.

According to this aspect, in the vehicle seat, the locked state can be maintained when the seat back is in the forward tilted state.

In the above aspect, when the seat back frame is in the rotation limit position to the front side with respect to the floor, the first contact portion abuts on the operation portion and the operation portion is moved to the operation position. Good to keep.

According to this aspect, in the vehicle seat, the locked state can be maintained when the seat back is in the forward rotation limit position.

In the above aspect, the first member has a stopper (81) protruding toward the seat back frame side, and the seat back frame rotates to the rear side of the seat back frame by abutting on the stopper. It has a convex portion (82) that determines a movement limit position, and the stopper is arranged on the first member so as to have an overlap with the seat back frame when viewed from a direction along the rotation axis of the seat back frame. It is good to be there.

According to this aspect, since the stopper is arranged between the first member and the second member, the coupling structure of the first member and the second member can be miniaturized. As a result, the cover that covers the connecting structure of the first member and the second member can be miniaturized.

In the above aspect, the stopper and the convex portion are formed from the rotation axis of the first contact portion in the radial direction about the rotation axis of the seat back frame when the seat back frame is in the upright position. Should also be located on the outside and below.

According to this aspect, since the stopper is arranged away from the rotation axis of the seat back frame, the seat back frame is surely maintained at a predetermined position by the contact between the stopper and the convex portion.

The present invention is interposed between the first member (18) and the second member (21), rotatably supports the second member with respect to the first member, and supports the first member with respect to the first member. An angle adjusting device (14) capable of maintaining the second member at an arbitrary angle, the first rotating body (41) coupled to the first member and rotatably supported by the first rotating body. A second rotating body (42) coupled to the second member, and the first rotating body and the second rotating body provided between the first rotating body and the second rotating body. A lock position that engages with both of the first rotating body and regulates the relative rotation of the second rotating body, and away from one of the first rotating body and the second rotating body, the first rotating body and the first rotating body and A lock member (43) that can move between the release position that enables the relative rotation of the second rotating body, an urging member (44) that urges the lock member toward the lock position, and an initial stage. The lock member is released from the second rotating body so as to be displaceable between the position and the operation position, and by moving from the initial position to the operation position, the lock member is released against the urging force of the urging member. An operation unit (45) to be moved to a position and an operation unit provided on the first member or the second member, and the operation unit is provided when the angle of the second member with respect to the first member is within a predetermined first angle range. It has a first contact portion (71) that abuts and maintains the operation portion at the operation position. According to this aspect, when the angle of the second member with respect to the first member is in the first angle range, the operation portion abuts on the first contact portion and is maintained at the operation position, and the lock member is maintained at the release position. NS. The first contact portion is a member provided on the first member or the second member, and can be easily attached and changed. Therefore, in the angle adjusting device, it is possible to easily change the angle range maintained in the unlocked state.

The operation unit is rotatably provided between the initial position and the operation position, and the first contact portion can press a separated position away from the operation unit and the operation unit to the operation position. It is provided on the second member so as to be rotatable with respect to the pressing position, and when the angle of the second member with respect to the first member is within the first angle range, it comes into contact with the first contact portion. It is preferable to have a second contact portion (75) that pushes the first contact portion toward the pressing position side. According to this aspect, the size of at least one of the operating portion and the first contact portion can be reduced.

The first contact portion has a fan-shaped plate (71A) extending in the radial direction from its own rotation shaft, and the rotation shaft (B) of the plate is the rotation shaft (A) of the operation portion. The side edge portion (71D) extending in the radial direction of the plate is in contact with the second contact portion, and the arc portion (71C) of the plate is in contact with the operation portion. It is preferable that the operation unit is maintained at the operation position. According to this aspect, in a state where the first contact portion is in contact with the second contact portion, the first contact portion rotates with respect to the second member, so that the second member is in contact with the first member. Can rotate. Further, since the first contact portion is in sliding contact with the operation portion in the arc portion, the first contact portion can rotate with respect to the second member in a state of being in sliding contact with the operation portion. As a result, the second member can rotate with respect to the first member while maintaining the state in which the first contact portion is in contact with the operation portion.

It is preferable to have a second urging member (73) that urges the first contact portion toward the separated position side. According to this aspect, the position of the first contact portion is determined, and the vibration of the first contact portion and the collision between the first contact portion and another member can be suppressed.

The first rotating body or the second rotating body hits the lock member when the angle of the second member with respect to the first member is in a second angle range including an angle range different from the first angle range. It is preferable to have a regulating portion that is in contact with the lock member to maintain the lock member in the released position. According to this aspect, the range of angles at which the lock is released can be extended.

The operation unit is arranged between the first rotating body and the second rotating body, and has a first rotation position for pushing the lock member to the lock position and a second rotation position for pushing the lock member to the release position of the lock position. A cam (47) that can rotate between the two, a first shaft (48) that extends along the rotation axis of the cam and projects outward from the second rotating body, and a tip of the first shaft. It is preferable that the plate has an operating lever (49) extending in the radial direction of the first shaft, and the plate comes into contact with the operating lever. According to this aspect, since the plate and the operating lever are arranged outside the first rotating body and the second rotating body, the structure of the angle adjusting device can be simplified.

The operating lever has a contact pin (49B) extending in parallel with the first shaft, and the first contact portion may be in sliding contact with the arc portion at the contact pin. According to this aspect, the structure of the contact portion between the first contact portion and the operation lever can be simplified.

The angle adjusting device (14) is provided, the first member is a base (18) provided on the floor (15), or a seat cushion frame provided on the floor, and the second member is a seat back frame. It is a vehicle seat (1) which is (5). According to this aspect, in the vehicle seat, the unlocked state can be maintained when the angle of the seat back with respect to the seat cushion frame is within a predetermined angle range.

When the seat back frame is in a predetermined forward tilted state with respect to the floor, the first contact portion may come into contact with the operation portion to maintain the operation portion at the operation position. According to this aspect, in the vehicle seat, the locked state can be maintained when the seat back is in the forward tilted state.

When the seat back frame is in the rotation limit position toward the front side with respect to the floor, the first contact portion may come into contact with the operation portion to maintain the operation portion at the operation position. According to this aspect, in the vehicle seat, the locked state can be maintained when the seat back is in the forward rotation limit position.

The first member has a stopper (81) protruding toward the seat back frame side, and the seat back frame determines a rotation limit position to the rear side of the seat back frame by abutting on the stopper. It is preferable that the stopper has a convex portion (82) and is arranged on the first member so as to have an overlap with the seat back frame when viewed from a direction along the rotation axis of the seat back frame. According to this aspect, since the stopper is arranged between the first member and the second member, the coupling structure of the first member and the second member can be miniaturized. As a result, the cover that covers the connecting structure of the first member and the second member can be miniaturized.

When the seat back frame is in the upright position, the stopper and the convex portion are outward and downward from the rotation axis of the first contact portion in the radial direction about the rotation axis of the seat back frame. It should be placed in. According to this aspect, since the stopper is arranged away from the rotation axis of the seat back frame, the seat back frame is surely maintained at a predetermined position by the contact between the stopper and the convex portion.

Perspective view of the sheet according to the embodiment Perspective view of the seat frame Left side view of the seat frame An exploded perspective view of the reclining device Plan view showing the inner surface side of the first rotating body Explanatory drawing showing the internal structure of the reclining device in the locked state Explanatory drawing showing the internal structure of the reclining device in the unlocked state Side view of the reclining device in the upright position Side view of a reclining device showing a forward tilted state in which the first contact portion and the second contact portion are in contact with each other. Side view of a reclining device showing a forward tilted state in which the operating portion is maintained at the operating position by the first contact portion. Perspective view of reclining device Side view of the reclining device according to the modified example

Hereinafter, embodiments of the present invention will be described with reference to the drawings. A vehicle seat is a seat applied to a rear seat, for example, in the second or third row of an automobile.

As shown in FIGS. 1 and 2, the seat 1 has a seat cushion 2 and a seat back 3. The seat cushion 2 has a seat cushion frame 5, a pad 6 supported by the seat cushion frame 5, and a skin material 7 that covers the pad 6. The seat back 3 has a seat back frame 9, a pad 10 supported by the seat back frame 9, and a skin material 11 that covers the pad 10.

The seat back frame 9 is attached to the floor 15 of the automobile via the slide device 13 and the reclining device 14. As a result, the seat back frame 9 is slidable with respect to the floor 15 and can be rotated (tilted) with respect to the slide device 13. The seat cushion frame 5 is rotatably attached to the seat back frame 9 via a tip-up device 16.

As shown in FIG. 3, the floor 15 has a high-level portion 15A on which the slide device 13 is installed and a low-level portion 15B formed on the front side and below the high-level portion 15A. The slide device 13 has a pair of left and right lower rails 13A extending in the front-rear direction and a pair of left and right upper rails 13B displaceably supported by each of the lower rails 13A, which are provided in the high portion 15A. Bases 18 are provided on the upper portions of the left and right upper rails 13B. As shown in FIG. 2, the left and right bases 18 are connected to each other by a connecting member 19 extending to the left and right. The left and right bases 18 are each formed by press-molding a metal plate or the like. The connecting member 19 is coupled to the corresponding base 18 at the left and right ends.

As shown in FIG. 2, the seat back frame 9 has a pair of left and right backside members 21 extending vertically, an upper member 22 extending left and right and connecting the upper ends of the left and right backside members 21, and below the upper member 22. It has a lower member 23 that extends to the left and right and connects the intermediate end ends of the left and right backside members 21. In the present embodiment, the upper portions of the left and right backside members 21, the upper member 22, and the lower member 23 are formed by a pipe frame formed in a vertically long rectangular frame shape. The lower portions of the left and right back side members 21 are formed of sheet metal.

The lower portions of the left and right back side members 21 have side surfaces facing in the left-right direction. The rear portions of the left and right bases 18 have sides facing left and right. The lower portion of each backside member 21 faces the rear portion of the corresponding base 18 on the left and right sides in the left-right direction via the reclining device 14. The lower portion of each backside member 21 is rotatably connected to the rear portion of the corresponding base 18 on the left and right sides via a reclining device 14. The rotation axes of the left and right backside members 21 extend to the left and right and are arranged coaxially with each other.

The seat cushion frame 5 includes left and right cushion side members 26 extending in the front-rear direction, front members 27 extending left and right to connect the front ends of the left and right cushion side members 26, and rear portions of the left and right cushion side members 26 extending left and right. It has a rear member 28 that connects the two. The rear ends of the left and right cushion side members 26 are rotatably attached to the corresponding back side members 21 on the left and right. The rotation axes of the left and right cushion side members 26 extend to the left and right, respectively, and are arranged coaxially with each other.

The left and right bases 18 have a support portion 31 projecting upward in an intermediate portion in the front-rear direction. The lower portions of the left and right cushion side members 26 have an extension portion extending in a direction approaching each other. The seat cushion 2 was supported from below by the left and right bases 18 by the lower portion of the extending portion abutting on the upper surface of the supporting portion of the corresponding base 18 on the left and right, and the left and right cushion side members 26 extended substantially horizontally. It is placed in the seating position.

Since the left and right reclining devices 14 have the same configuration, the left reclining device 14 will be described below. The reclining device 14 is interposed between the base 18 as the first member and the lower end of the backside member 21 as the second member. The reclining device 14 is an angle adjusting device that can rotatably support the backside member 21 with respect to the base 18 and maintain the backside member 21 at an arbitrary angle with respect to the base 18.

As shown in FIG. 4, the reclining device 14 is rotatably supported by the first rotating body 41 coupled to the base 18 and the first rotating body 41, and is coupled to the backside member 21 in the second rotation. It is provided between the body 42, the first rotating body 41 and the second rotating body 42, and engages with both the first rotating body 41 and the second rotating body 42 to engage with the first rotating body 41 and the second rotating body 42. Between the lock position that regulates the relative rotation of the 42 and the release position that allows the relative rotation of the first rotating body 41 and the second rotating body 42 away from one of the first rotating body 41 and the second rotating body 42. The lock member 43 that can be moved by the above, the urging member 44 that urges the lock member 43 toward the lock position, and the second rotating body 42 that is displaceable between the initial position and the operation position, and is provided at the initial position. It has an operation unit 45 that moves the lock member 43 to the release position against the urging force of the urging member 44 by moving from the urging member 44 to the operating position.

As shown in FIGS. 4 and 8, the operation unit 45 is arranged between the first rotating body 41 and the second rotating body 42, and has a first rotation position for pushing the lock member 43 to the lock position and a release of the lock position. A cam 47 that can rotate between a second rotation position that allows movement to a position, a first shaft 48 that extends along the rotation axis of the cam 47 and projects outward from the second rotating body 42, and a first shaft. It has an operating lever 49 provided at the tip of one shaft 48 and extending in the radial direction of the first shaft 48. In this embodiment, the cam 47 includes a central cam 51 and a cam plate 52.

As shown in FIGS. 4 and 5, the first rotating body 41 has a disk-shaped main body portion 41A and a cylindrical edge wall 41B projecting along the edge of the main body portion 41A. An annular internal tooth 41C is formed on the inner peripheral surface of the edge wall 41B. The second rotating body 42 is formed in a disk shape. The second rotating body 42 is rotatably received inside the edge wall 41B in coaxial with the first rotating body 41. The outer peripheral portions of the first rotating body 41 and the second rotating body 42 are received by the tubular cover 54. The cover 54 regulates the relative movement of the second rotating body 42 with respect to the first rotating body 41 in the axial direction. The cover 54 attaches the second rotating body 42 to the first rotating body 41.

As shown in FIGS. 4 and 6, the second rotating body 42 has four guide grooves 42A extending in the radial direction on the surface of the first rotating body 41 facing the main body portion 41A. The four guide grooves 42A are arranged at 90 ° intervals. A lock member 43 is arranged in each guide groove 42A so as to be slidable in the radial direction. The second rotating body 42 has a central groove 42C that rotatably receives the central cam 51 at the center of the surface of the first rotating body 41 facing the main body portion 41A. The central groove 42C is connected to each guide groove 42A.

The lock member 43 arranged in each guide groove 42A extends along the radial direction of the second rotating body 42, has a gear portion 43A at its radial outer end, and has a cam surface 43B inside the radial direction. The central cam 51 arranged in the central groove 42C is a plate cam and is arranged coaxially with the second rotating body 42. The central cam 51 has a cam surface 51A on the outer peripheral portion, and is in sliding contact with the cam surface 43B of each lock member 43 on the cam surface 51A. The central cam 51 is rotatable between the first rotation position and the second rotation position. When the central cam 51 is in the first rotation position, each lock member 43 is pushed outward in the radial direction by the central cam 51 and is located in the lock position. When each lock member 43 is in the locked position, the gear portion 43A of each lock member 43 meshes with the internal teeth 41C of the first rotating body 41. When the central cam 51 is in the second rotation position, the central cam 51 is separated from the cam 47 surface of each lock member 43, and each lock member 43 is located at a release position located radially inward with respect to the lock position. Can be done. When each lock member 43 is in the release position, the gear portion 43A of each lock member 43 separates from the internal teeth 41C of the first rotating body 41.

The cam plate 52 is formed in a disk shape and is arranged between the main body 41A of the first rotating body 41 and the second rotating body 42. The cam plate 52 is coupled to the central cam 51 so as to rotate integrally with the central cam 51. In the present embodiment, the cam plate 52 is coupled to the central cam 51 via the first shaft 48, and the cam plate 52, the shaft, and the central cam 51 rotate integrally. Each lock member 43 has a convex portion 43C on the surface on the cam plate 52 side. The cam plate 52 has a plurality of cam holes 52A that receive each convex portion 43C. The cam plate 52 can rotate together with the central cam 51 between the first rotation position and the second rotation position. When the cam plate 52 is in the first rotation position, each cam hole 52A allows the corresponding convex portion 43C to move to the lock position, and each lock member 43 can be located in the lock position. When the cam plate 52 is in the second rotation position, each cam hole 52A restricts the movement of the corresponding convex portion 43C to the lock position, and each lock member 43 is arranged in the release position.

With the central cam 51 and the cam plate 52, when the central cam 51 and the cam plate 52 are in the first rotation position, each lock member 43 is arranged in the lock position, and the central cam 51 and the cam plate 52 are in the second rotation position. At that time, each lock member 43 is arranged at the release position.

In this embodiment, the urging member 44 is two torsion springs. Each urging member 44 has one end locked to the second rotating body 42 and the other end locked to the central cam 51. Each urging member 44 urges the central cam 51 to the first rotation position with respect to the second rotating body 42. As a result, each urging member 44 urges each urging member 44 to the locked position via the central cam 51.

As shown in FIG. 8, the first shaft 48 penetrates the center of the second rotating body 42 and the backside member 21, and projects outward from the backside member 21. The operating lever 49 extends radially from the outer end of the first shaft 48. The operating lever 49 is rotatable between the initial position and the operating position. When the operating lever 49 is in the initial position, the central cam 51 and the cam plate 52 are in the first rotation position. When the operating lever 49 is in the operating position, the central cam 51 and the cam plate 52 are in the second rotation position.

As shown in FIG. 5, a regulating wall 41D (regulating portion) is provided on the surface of the main body portion 41A of the first rotating body 41 on the second rotating body 42 side. In this embodiment, a pair of regulation walls 41D is provided. The regulation wall 41D is formed in an arc shape with reference to the center of the first rotating body 41 and has a predetermined angle range. The pair of regulation walls 41D are arranged radially inside the internal teeth 41C. The pair of restricting walls 41D are provided at rotationally symmetrical positions with respect to the center of the first rotating body 41. When the rotation angle of the second rotating body 42 with respect to the first rotating body 41 is within a predetermined angle range (hereinafter referred to as a regulation angle range (second angle range)), each regulation wall 41D has a diameter of a corresponding convex portion 43C. It is arranged outside the direction and restricts the movement of the lock member 43 to the lock position. That is, when the convex portion 43C comes into contact with the regulation wall 41D, the lock member 43 is maintained at the released position. By maintaining the two lock members 43 in the release position, the central cam 51 and the cam plate 52 are maintained in the second rotation position, and the remaining two lock members 43 are also maintained in the release position. The regulation angle range may be set corresponding to the rotation of the backside member 21 to the front side from the standing position with respect to the base side.

As shown in FIG. 6, in the reclining device 14, in the initial state, the central cam 51 and the cam plate 52 are positioned at the first rotation position and the lock member 43 is positioned at the lock position due to the urging force of the urging member 44. , The operating lever 49 is located at the initial position. In this state, the gear portion 43A of the lock member 43 meshes with the internal teeth 41C of the first rotating body 41, so that the relative rotation between the first rotating body 41 and the second rotating body 42 is locked. As shown in FIG. 7, when the operating lever 49 is pushed by the user or another structure against the urging force of the urging member 44 and moved to the operating position, the central cam 51 and the cam plate 52 rotate second. It moves to the position, and the lock member 43 moves to the release position. In this state, the gear portion 43A of the lock member 43 is separated from the internal teeth 41C of the first rotating body 41, and the relative rotation between the first rotating body 41 and the second rotating body 42 becomes possible. Further, when the rotation angle of the second rotating body 42 with respect to the first rotating body 41 is within the regulation angle range, the convex portions 43C of the two lock members 43 come into contact with the regulation wall 41D in the radial direction. As a result, each lock member 43 is maintained in the release position, the central cam 51 and the cam plate 52 are maintained in the first rotation position, and the operation lever 49 is maintained in the operation position. In this state, the gear portion 43A of the lock member 43 is separated from the internal teeth 41C of the first rotating body 41, and the relative rotation between the first rotating body 41 and the second rotating body 42 becomes possible.

As shown in FIG. 8, the first rotating body 41 is coupled to the rear end of the base 18. The second rotating body 42 is coupled to the lower end of the backside member 21. The reclining device 14 has a rotation axis extending in the left-right direction while being coupled to the base 18 and the backside member 21. The backside member 21 has a bracket 61 on a side surface of the lower end thereof opposite to the reclining device 14 side. The bracket 61 is formed in a plate shape and is arranged along the backside member 21. The bracket 61 constitutes an outer surface of the backside member 21 that contradicts the reclining device 14 side. The first shaft 48 of the reclining device 14 penetrates the backside member 21 and projects from the outer surface opposite to the base 18 side of the backside member 21, that is, the bracket 61.

In the present embodiment, when the backside member 21 is in the upright position with respect to the base 18, the operating lever 49 in the initial position extends forward and upward from the first shaft 48. In another embodiment, when the backside member 21 is in the upright position with respect to the base 18, the operating lever 49 may extend horizontally forward from the first shaft 48 and extend forward and downward. May be good. The operating position of the operating lever 49 is located in the same rotation direction as the backward tilting rotation of the backside member 21 with respect to the initial position. In FIG. 8, the direction of the backward tilt rotation of the seat back 3 is the clockwise direction, and the direction of the forward tilt rotation of the seat back 3 is the counterclockwise direction.

The operation lever 49 is connected to the operation input device 65 by a control cable 63. As shown in FIG. 1, the operation input device 65 is an input device for the user to operate, and may be, for example, an operation knob provided on the shoulder of the upper end of the seat back 3. In another embodiment, the operation input device 65 may be a strap extending from the seat back 3. The occupant can rotate the operation lever 49 from the initial position to the operation position by operating the operation input device 65.

As shown in FIG. 8, the bracket 61 is provided with a first contact portion 71. The first contact portion 71 is rotatably supported by the bracket 61 about a rotation shaft B arranged in parallel with the rotation shaft A of the operation lever 49. The first contact portion 71 has a fan-shaped plate 71A extending in the radial direction from its own rotation axis B. The plate 71A may be rotatably supported by a second shaft 71B projecting from the bracket 61. The second shaft 71B extends parallel to the first shaft 48 and is set shorter than the first shaft 48. The plate 71A has an arc portion 71C centered on the rotation axis B and a pair of side edge portions 71D extending in the radial direction from the rotation axis B to the arc portion 71C.

The operating lever 49 extends from the plate-shaped main body 49A extending in the radial direction from the first shaft 48 to the backside member 21 and the second rotating body 42 side in parallel with the first shaft 48 from the tip of the main body 49A. It has a contact pin 49B. The contact pin 49B is preferably formed in a columnar shape.

The plate 71A of the first contact portion 71 rotates about the rotation axis B between a separated position away from the contact pin 49B and a pressing position where the contact pin 49B can be pressed. The bracket 61 has a stopper 61A that regulates the rotational position of the plate 71A. When the plate 71A is in contact with the stopper 61A, the plate 71A is separated from the contact pin 49B regardless of the position of the operating lever 49. That is, the plate 71A is in a separated position. An urging member 73 for urging the plate 71A to the stopper 61A side (separation position side) is provided between the plate 71A and the bracket 61. The urging member 73 may be a spring such as a torsion coil spring provided around the second shaft 71B. Since the position of the plate 71A is determined by the urging member 73, the vibration of the plate 71A and the collision between the plate 71A and other members are suppressed.

As shown in FIG. 8, when viewed from the direction along the rotation axis A, the lower end of the backside member 21 is formed in a semicircular shape centered on the rotation axis A. The plate 71A projects radially outward of the rotation axis A from the outer peripheral edge of the lower end of the backside member 21 when viewed from the direction along the rotation axis A. The base 18 is provided with a second contact portion 75 projecting toward the back side member 21 in parallel with the rotation axis A. In the present embodiment, the second contact portion 75 is a columnar pin extending parallel to the rotation axis A. When the angle of the backside member 21 with respect to the base 18 is within a predetermined angle range, the second contact portion 75 abuts on the plate 71A of the first contact portion 71 and pushes the plate 71A toward the pressing position side. The second contact portion 75 contacts the side edge portion 71D of the plate 71A and rotates the plate 71A around the rotation axis B.

As shown in FIG. 11, the base 18 has a stopper 81 protruding toward the back side member 21. The stopper 81 is, for example, a block made of resin or the like, and may be fixed to the side surface of the base 18 on the back side member 21 side by a fastening member such as a screw. The backside member 21 has a convex portion 82 that determines the position of the rotation limit to the rear side of the seat back frame 9 by contacting the stopper 81. The convex portion 82 may be formed integrally with the backside member 21. The convex portion 82 may extend from the outer peripheral edge of the lower end portion of the back side member 21 toward the base 18 side in parallel with the rotation axis A. The stopper 81 may be arranged on the base 18 so as to have an overlap with the back side member 21 when viewed from the direction along the rotation axis B. Since the stopper 81 is arranged between the base 18 and the backside member 21, the coupling structure of the base 18 and the backside member 21 can be miniaturized. As a result, the cover that covers the connecting structure of the base 18 and the backside member 21 can be miniaturized.

The stopper 81 and the convex portion 82 are arranged outward and below the rotating shaft B of the first contact portion 71 in the radial direction centered on the rotating shaft A when the seat back frame 9 is in the upright position. It is good to have. Since the stopper 81 is arranged away from the rotation axis B of the back side member 21, the seat back frame 9 is surely maintained at a predetermined position by the contact between the stopper 81 and the convex portion 82.

The operation and effect of the reclining device 14 and the seat 1 configured as described above will be described. FIG. 8 is a side view showing a rotating portion of the base 18 and the backside member 21 in a predetermined standing state. By operating the operation input device 65, the user can move the operation levers 49 of the left and right reclining devices 14 from the initial position to the operation position, and can put the reclining device 14 in the unlocked state. The reclining device 14 is maintained in the unlocked state while the user continues to operate the operation input device 65. When the reclining device 14 is in the unlocked state, the user can rotate the backside member 21 with respect to the base 18. In the standing state, when the user stops the operation of the operation input device 65, the reclining device 14 returns to the locked state by the urging force of the urging member 44, and the operation lever 49 returns from the operation position to the initial position.

When the backside member 21 rotates forward from the upright state of the backside member 21 shown in FIG. 8, the second hit when the angle of the backside member 21 with respect to the base 18 becomes a predetermined angle as shown in FIG. The contact portion 75 abuts on one side edge portion 71D of the plate 71A of the first contact portion 71. In the state shown in FIG. 9, since the plate 71A of the first contact portion 71 is separated from the operation lever 49, the operation lever 49 returns to the initial position when the user stops the operation of the operation input device 65.

After that, when the backside member 21 further rotates to the front side, the second contact portion 75 pushes the plate 71A toward the pressing position side against the urging force of the urging member 73, and the plate 71A rotates. As shown in FIG. 10, when the backside member 21 further rotates forward with respect to the base 18 and the angle of the backside member 21 with respect to the base 18 falls within a predetermined first angle range, the plate 71A reaches the pressing position. do. In this state, even if the user stops the operation of the operation input device 65, the operation lever 49 is maintained at the operation position by the contact between the plate 71A and the contact pin 49B. That is, the reclining device 14 is maintained in the unlocked state. At this time, the plate 71A comes into contact with the contact pin 49B at the arc portion 71C. In this state, even if the plate 71A further rotates in response to the rotation of the front side of the backside member 21, the arc portion 71C of the plate 71A slides with respect to the contact pin 49B and further pushes the contact pin 49B. There is no such thing. As a result, the rotation of the backside member 21 with respect to the base 18 is not hindered.

The reclining device 14 may be maintained in the unlocked state by the contact between the convex portion 43C and the regulation wall 41D in the angle range until the angle of the backside member 21 with respect to the base 18 becomes a predetermined first angle range.

When the backside member 21 rotates to the rear side, the plate 71A returns to the separated position according to the position of the second contact portion 75, and the operating lever 49 can return to the initial position from the operating position. When the user stops the operation of the operation input device 65 in this state, the reclining device 14 is locked.

The first contact portion 71 is a member provided on the base 18 or the backside member 21, and can be easily attached and changed. Therefore, in the reclining device 14, it is possible to easily change the angle range maintained in the unlocked state. Normally, the reclining device is often supplied as a unit, and in order to change the angle range maintained in the unlocked state, the shape of the reclining device, such as the regulation wall 41D, is arranged inside the reclining device. Need to change. In the reclining device 14 according to the present embodiment, the lock is released by changing the shape and position of the first contact portion 71 and the second contact portion 75 arranged outside regardless of the shape of the regulation wall 41D. The angle range that is maintained in the closed state can be easily changed.

Since the plate 71A is rotatably provided with respect to the backside member 21 and slides into contact with the contact pin 49B at the arc portion 71C, the first contact portion 71 and the second contact portion 75 come into contact with each other and the second contact portion 75. 1 The contact between the contact portion 71 and the operating lever 49 does not hinder the rotation of the backside member 21 with respect to the base 18.

The reclining device 14 can be maintained in the unlocked state even when the regulation wall 41D of the first rotating body 41 and the convex portion 43C of the lock member 43 come into contact with each other. The angle range of the backside member 21 with respect to the base 18 when the regulation wall 41D and the convex portion 43C are in contact with each other is different from the angle range when the first contact portion 71 maintains the operating lever 49 in the operating position. By including it, the angle range in which the lock is released can be extended.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. The first rotating body 41 may be coupled to the backside member 21 and the second rotating body 42 may be coupled to the base 18. In this case, it is preferable that the first contact portion 71 is provided on the base 18 and the second contact portion 75 is provided on the backside member 21. Further, the reclining device 14 is not limited to the rotating portion between the base 18 and the back side member 21, but may be provided at the rotating portion between the seat cushion 2 and the seat back 3.

The angle range of the backside member 21 with respect to the base 18 in which the first contact portion 71 contacts the operation lever 49 to maintain the operation lever 49 in the operating position is such that the backside member 21 is tilted forward with respect to the floor 15. It is preferable that a certain angle range or the back side member 21 is set in an angle range at a position where the back side member 21 can rotate forward with respect to the floor 15.

By adjusting the shape of the plate 71A, the angle of the backside member 21 when the first contact portion 71 pushes the operation lever 49 to the operation position can be changed. For example, as shown in FIG. 12, by reducing the angle width of the plate 71A about the rotation axis B, the backside member 21 when the first contact portion 71 pushes the operation lever 49 to the operation position. The forward angle can be increased. Further, by increasing the angle width about the rotation axis B of the plate 71A, the angle of the backside member 21 forward when the first contact portion 71 pushes the operation lever 49 to the operation position is reduced. be able to.

1: Seat 14: Reclining device 15: Floor 18: Side base (first member)
21: Backside member (second member)
41: 1st rotating body 41D: Regulatory wall 42: 2nd rotating body 43: Lock member 43C: Convex part 44: Biasing member 45: Operating part 47: Cam 48: 1st shaft 49: Operating lever 49B: Contact pin 51: Central cam 52: Cam plate 71: First contact portion 71A: Plate 71B: Second shaft 71C: Arc portion 71D: Side edge portion 73: Biasing member 75: Second contact portion

Claims (12)

It is interposed between the first member and the second member, supports the second member rotatably with respect to the first member, and supports the second member at an arbitrary angle with respect to the first member. A sustainable angle adjuster
The first rotating body coupled to the first member and
A second rotating body that is rotatably supported by the first rotating body and coupled to the second member,
Relative rotation of the first rotating body and the second rotating body provided between the first rotating body and the second rotating body and engaging with both the first rotating body and the second rotating body. Can be moved between a lock position that regulates the movement and a release position that allows relative rotation of the first rotating body and the second rotating body away from one of the first rotating body and the second rotating body. With the lock member
An urging member that urges the lock member toward the lock position,
The lock member is provided on the second rotating body so as to be displaceable between the initial position and the operation position, and by moving from the initial position to the operation position, the lock member is moved against the urging force of the urging member. The operation unit to move to the release position and
When the angle of the second member with respect to the first member, which is provided on the first member or the second member, is within a predetermined first angle range, the operation unit comes into contact with the operation unit to move the operation unit to the operation position. An angle adjusting device having a first contact portion to be maintained. The operation unit is rotatably provided between the initial position and the operation position.
The first contact portion is provided on the second member so as to be rotatable between a separated position away from the operating portion and a pressing position capable of pressing the operating portion to the operating position.
When the angle of the second member with respect to the first member is within the first angle range, the second contact portion comes into contact with the first contact portion and pushes the first contact portion toward the pressing position side. The angle adjusting device according to claim 1. The first contact portion has a fan-shaped plate extending in the radial direction from its own rotation axis.
The rotation axis of the plate is arranged in parallel with the rotation axis of the operation unit.
The side edge portion extending in the radial direction of the plate abuts on the second contact portion,
The angle adjusting device according to claim 2, wherein the operating portion is maintained at the operating position when the arc portion of the plate is in contact with the operating portion. The angle adjusting device according to claim 2 or 3, further comprising a second urging member that urges the first contact portion toward the separated position side. The first rotating body or the second rotating body hits the lock member when the angle of the second member with respect to the first member is in a second angle range including an angle range different from the first angle range. The angle adjusting device according to any one of claims 1 to 4, further comprising a regulating unit that contacts and maintains the lock member in the released position. The operation unit
Rotated between the first rotating position, which is arranged between the first rotating body and the second rotating body, and pushes the lock member to the lock position, and a second rotation position, which pushes the lock position to the release position. With possible cams
A first shaft extending along the rotation axis of the cam and projecting outward from the second rotating body,
It has an operating lever provided at the tip of the first shaft and extending in the radial direction of the first shaft.
The angle adjusting device according to claim 3, wherein the plate abuts on the operating lever. The operating lever has a contact pin extending parallel to the first shaft.
The angle adjusting device according to claim 6, wherein the first contact portion is in sliding contact with the arc portion at the contact pin. The angle adjusting device according to any one of claims 1 to 7 is provided.
The first member is a base provided on the floor or a seat cushion frame provided on the floor.
The second member is a vehicle seat which is a seat back frame. 8. The eighth aspect of the present invention, wherein when the seat back frame is in a predetermined forward tilted state with respect to the floor, the first contact portion abuts on the operation portion to maintain the operation portion at the operation position. Vehicle seats. 9. The claim 9 in which the first contact portion abuts on the operation portion to maintain the operation portion at the operation position when the seat back frame is in the rotation limit position toward the front side with respect to the floor. The vehicle seat described in. The first member has a stopper protruding toward the seat back frame side.
The seat back frame has a convex portion that determines a rotation limit position to the rear side of the seat back frame by abutting on the stopper.
The stopper according to any one of claims 8 to 10, wherein the stopper is arranged on the first member so as to have an overlap with the seat back frame when viewed from a direction along the rotation axis of the seat back frame. The vehicle seat described in. When the seat back frame is in the upright position, the stopper and the convex portion are outward and downward from the rotation axis of the first contact portion in the radial direction about the rotation axis of the seat back frame. The vehicle seat according to any one of claims 8 to 10, which is arranged in the vehicle.

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